Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (39 commits) [PATCH] fix RLIM_NOFILE handling [PATCH] get rid of corner case in dup3() entirely [PATCH] remove remaining namei_{32,64}.h crap [PATCH] get rid of indirect users of namei.h [PATCH] get rid of __user_path_lookup_open [PATCH] f_count may wrap around [PATCH] dup3 fix [PATCH] don't pass nameidata to __ncp_lookup_validate() [PATCH] don't pass nameidata to gfs2_lookupi() [PATCH] new (local) helper: user_path_parent() [PATCH] sanitize __user_walk_fd() et.al. [PATCH] preparation to __user_walk_fd cleanup [PATCH] kill nameidata passing to permission(), rename to inode_permission() [PATCH] take noexec checks to very few callers that care Re: [PATCH 3/6] vfs: open_exec cleanup [patch 4/4] vfs: immutable inode checking cleanup [patch 3/4] fat: dont call notify_change [patch 2/4] vfs: utimes cleanup [patch 1/4] vfs: utimes: move owner check into inode_change_ok() [PATCH] vfs: use kstrdup() and check failing allocation ...
author: Linus Torvalds <torvalds@linux-foundation.org> 2008-07-26 23:23:44 -0400
committer: Linus Torvalds <torvalds@linux-foundation.org> 2008-07-26 23:23:44 -0400
commit: 4836e3007882984279ca63d3c42bf0b14616eb78 (patch)
tree: 28bf22726964e068b825491d71a141eefedbe5f8
parent: 5c7c204aeca51ccfad63caab4fcdc5d8026c0fd8 (diff)
parent: 4e1e018ecc6f7bfd10fc75b3ff9715cc8164e0a2 (diff)
126 files changed, 1088 insertions, 1535 deletions
diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c
index 32ca1b927307..6e943135f0e0 100644
--- a/arch/alpha/kernel/osf_sys.c
+++ b/arch/alpha/kernel/osf_sys.c
@@ -253,15 +253,15 @@ do_osf_statfs(struct dentry * dentry, struct osf_statfs __user *buffer,
 }
 asmlinkage int
-osf_statfs(char __user *path, struct osf_statfs __user *buffer, unsigned long bufsiz)
+osf_statfs(char __user *pathname, struct osf_statfs __user *buffer, unsigned long bufsiz)
 {
-        struct nameidata nd;
+        struct path path;
        int retval;
-        retval = user_path_walk(path, &nd);
+        retval = user_path(pathname, &path);
        if (!retval) {
-                retval = do_osf_statfs(nd.path.dentry, buffer, bufsiz);
+                retval = do_osf_statfs(path.dentry, buffer, bufsiz);
-                path_put(&nd.path);
+                path_put(&path);
        }
        return retval;
 }
diff --git a/arch/parisc/hpux/sys_hpux.c b/arch/parisc/hpux/sys_hpux.c
index be255ebb609c..18072e03a019 100644
--- a/arch/parisc/hpux/sys_hpux.c
+++ b/arch/parisc/hpux/sys_hpux.c
@@ -210,19 +210,19 @@ static int vfs_statfs_hpux(struct dentry *dentry, struct hpux_statfs *buf)
 }
 /* hpux statfs */
-asmlinkage long hpux_statfs(const char __user *path,
+asmlinkage long hpux_statfs(const char __user *pathname,
                                                struct hpux_statfs __user *buf)
 {
-        struct nameidata nd;
+        struct path path;
        int error;
-        error = user_path_walk(path, &nd);
+        error = user_path(pathname, &path);
        if (!error) {
                struct hpux_statfs tmp;
-                error = vfs_statfs_hpux(nd.path.dentry, &tmp);
+                error = vfs_statfs_hpux(path.dentry, &tmp);
                if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
                        error = -EFAULT;
-                path_put(&nd.path);
+                path_put(&path);
        }
        return error;
 }
diff --git a/drivers/net/ppp_generic.c b/drivers/net/ppp_generic.c
index 739b3ab7bccc..ddccc074a76a 100644
--- a/drivers/net/ppp_generic.c
+++ b/drivers/net/ppp_generic.c
@@ -581,12 +581,12 @@ static long ppp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
                        if (file == ppp->owner)
                                ppp_shutdown_interface(ppp);
                }
-                if (atomic_read(&file->f_count) <= 2) {
+                if (atomic_long_read(&file->f_count) <= 2) {
                        ppp_release(NULL, file);
                        err = 0;
                } else
-                        printk(KERN_DEBUG "PPPIOCDETACH file->f_count=%d\n",
+                        printk(KERN_DEBUG "PPPIOCDETACH file->f_count=%ld\n",
-                               atomic_read(&file->f_count));
+                               atomic_long_read(&file->f_count));
                unlock_kernel();
                return err;
        }
diff --git a/fs/affs/file.c b/fs/affs/file.c
index 6eac7bdeec94..1377b1240b6e 100644
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -46,8 +46,6 @@ const struct inode_operations affs_file_inode_operations = {
 static int
 affs_file_open(struct inode *inode, struct file *filp)
 {
-        if (atomic_read(&filp->f_count) != 1)
-                return 0;
        pr_debug("AFFS: open(%lu,%d)\n",
                 inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt));
        atomic_inc(&AFFS_I(inode)->i_opencnt);
@@ -57,8 +55,6 @@ affs_file_open(struct inode *inode, struct file *filp)
 static int
 affs_file_release(struct inode *inode, struct file *filp)
 {
-        if (atomic_read(&filp->f_count) != 0)
-                return 0;
        pr_debug("AFFS: release(%lu, %d)\n",
                 inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt));
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index 7102824ba847..3cb6920ff30b 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -469,8 +469,6 @@ extern bool afs_cm_incoming_call(struct afs_call *);
 extern const struct inode_operations afs_dir_inode_operations;
 extern const struct file_operations afs_dir_file_operations;
-extern int afs_permission(struct inode *, int, struct nameidata *);
 /*
 * file.c
 */
@@ -605,7 +603,7 @@ extern void afs_clear_permits(struct afs_vnode *);
 extern void afs_cache_permit(struct afs_vnode *, struct key *, long);
 extern void afs_zap_permits(struct rcu_head *);
 extern struct key *afs_request_key(struct afs_cell *);
-extern int afs_permission(struct inode *, int, struct nameidata *);
+extern int afs_permission(struct inode *, int);
 /*
 * server.c
diff --git a/fs/afs/security.c b/fs/afs/security.c
index 3bcbeceba1bb..3ef504370034 100644
--- a/fs/afs/security.c
+++ b/fs/afs/security.c
@@ -284,7 +284,7 @@ static int afs_check_permit(struct afs_vnode *vnode, struct key *key,
 * - AFS ACLs are attached to directories only, and a file is controlled by its
 *   parent directory's ACL
 */
-int afs_permission(struct inode *inode, int mask, struct nameidata *nd)
+int afs_permission(struct inode *inode, int mask)
 {
        struct afs_vnode *vnode = AFS_FS_I(inode);
        afs_access_t uninitialized_var(access);
diff --git a/fs/aio.c b/fs/aio.c
index 0051fd94b44e..f658441d5666 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -512,8 +512,8 @@ static void aio_fput_routine(struct work_struct *data)
 */
 static int __aio_put_req(struct kioctx *ctx, struct kiocb *req)
 {
-        dprintk(KERN_DEBUG "aio_put(%p): f_count=%d\n",
+        dprintk(KERN_DEBUG "aio_put(%p): f_count=%ld\n",
-                req, atomic_read(&req->ki_filp->f_count));
+                req, atomic_long_read(&req->ki_filp->f_count));
        assert_spin_locked(&ctx->ctx_lock);
@@ -528,7 +528,7 @@ static int __aio_put_req(struct kioctx *ctx, struct kiocb *req)
        /* Must be done under the lock to serialise against cancellation.
         * Call this aio_fput as it duplicates fput via the fput_work.
         */
-        if (unlikely(atomic_dec_and_test(&req->ki_filp->f_count))) {
+        if (unlikely(atomic_long_dec_and_test(&req->ki_filp->f_count))) {
                get_ioctx(ctx);
                spin_lock(&fput_lock);
                list_add(&req->ki_list, &fput_head);
diff --git a/fs/attr.c b/fs/attr.c
index 966b73e25f82..26c71ba1eed4 100644
--- a/fs/attr.c
+++ b/fs/attr.c
@@ -51,7 +51,7 @@ int inode_change_ok(struct inode *inode, struct iattr *attr)
        }
        /* Check for setting the inode time. */
-        if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET)) {
+        if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)) {
                if (!is_owner_or_cap(inode))
                        goto error;
        }
@@ -108,6 +108,11 @@ int notify_change(struct dentry * dentry, struct iattr * attr)
        struct timespec now;
        unsigned int ia_valid = attr->ia_valid;
+        if (ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID | ATTR_TIMES_SET)) {
+                if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
+                        return -EPERM;
+        }
        now = current_fs_time(inode->i_sb);
        attr->ia_ctime = now;
diff --git a/fs/bad_inode.c b/fs/bad_inode.c
index f1c2ea8342f5..5f1538c03b1b 100644
--- a/fs/bad_inode.c
+++ b/fs/bad_inode.c
@@ -243,8 +243,7 @@ static int bad_inode_readlink(struct dentry *dentry, char __user *buffer,
        return -EIO;
 }
-static int bad_inode_permission(struct inode *inode, int mask,
+static int bad_inode_permission(struct inode *inode, int mask)
-                        struct nameidata *nd)
 {
        return -EIO;
 }
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index fe5f6809cba6..1ec7076f7b24 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -267,7 +267,7 @@ cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
        return 0;
 }
-static int cifs_permission(struct inode *inode, int mask, struct nameidata *nd)
+static int cifs_permission(struct inode *inode, int mask)
 {
        struct cifs_sb_info *cifs_sb;
diff --git a/fs/coda/dir.c b/fs/coda/dir.c
index 3d2580e00a3e..c5916228243c 100644
--- a/fs/coda/dir.c
+++ b/fs/coda/dir.c
@@ -137,9 +137,11 @@ exit:
 }
-int coda_permission(struct inode *inode, int mask, struct nameidata *nd)
+int coda_permission(struct inode *inode, int mask)
 {
        int error = 0;
+        mask &= MAY_READ | MAY_WRITE | MAY_EXEC;
 
        if (!mask)
                return 0; 
diff --git a/fs/coda/pioctl.c b/fs/coda/pioctl.c
index c21a1f552a63..c51365422aa8 100644
--- a/fs/coda/pioctl.c
+++ b/fs/coda/pioctl.c
@@ -24,8 +24,7 @@
 #include <linux/coda_psdev.h>
 /* pioctl ops */
-static int coda_ioctl_permission(struct inode *inode, int mask,
+static int coda_ioctl_permission(struct inode *inode, int mask);
-                                 struct nameidata *nd);
 static int coda_pioctl(struct inode * inode, struct file * filp, 
                       unsigned int cmd, unsigned long user_data);
@@ -42,8 +41,7 @@ const struct file_operations coda_ioctl_operations = {
 };
 /* the coda pioctl inode ops */
-static int coda_ioctl_permission(struct inode *inode, int mask,
+static int coda_ioctl_permission(struct inode *inode, int mask)
-                                 struct nameidata *nd)
 {
        return 0;
 }
@@ -51,7 +49,7 @@ static int coda_ioctl_permission(struct inode *inode, int mask,
 static int coda_pioctl(struct inode * inode, struct file * filp, 
                       unsigned int cmd, unsigned long user_data)
 {
-        struct nameidata nd;
+        struct path path;
        int error;
        struct PioctlData data;
        struct inode *target_inode = NULL;
@@ -66,21 +64,21 @@ static int coda_pioctl(struct inode * inode, struct file * filp,
         * Look up the pathname. Note that the pathname is in 
         * user memory, and namei takes care of this
         */
-        if ( data.follow ) {
+        if (data.follow) {
-                error = user_path_walk(data.path, &nd);
+                error = user_path(data.path, &path);
        } else {
-                error = user_path_walk_link(data.path, &nd);
+                error = user_lpath(data.path, &path);
        }
                
        if ( error ) {
                return error;
        } else {
-                target_inode = nd.path.dentry->d_inode;
+                target_inode = path.dentry->d_inode;
        }
        
        /* return if it is not a Coda inode */
        if ( target_inode->i_sb != inode->i_sb ) {
-                path_put(&nd.path);
+                path_put(&path);
                return  -EINVAL;
        }
@@ -89,7 +87,7 @@ static int coda_pioctl(struct inode * inode, struct file * filp,
        error = venus_pioctl(inode->i_sb, &(cnp->c_fid), cmd, &data);
-        path_put(&nd.path);
+        path_put(&path);
        return error;
 }
diff --git a/fs/compat.c b/fs/compat.c
index 106eba28ec5a..c9d1472e65c5 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -234,18 +234,18 @@ static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *
 * The following statfs calls are copies of code from fs/open.c and
 * should be checked against those from time to time
 */
-asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf)
+asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf)
 {
-        struct nameidata nd;
+        struct path path;
        int error;
-        error = user_path_walk(path, &nd);
+        error = user_path(pathname, &path);
        if (!error) {
                struct kstatfs tmp;
-                error = vfs_statfs(nd.path.dentry, &tmp);
+                error = vfs_statfs(path.dentry, &tmp);
                if (!error)
                        error = put_compat_statfs(buf, &tmp);
-                path_put(&nd.path);
+                path_put(&path);
        }
        return error;
 }
@@ -299,21 +299,21 @@ static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstat
        return 0;
 }
-asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf)
+asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t sz, struct compat_statfs64 __user *buf)
 {
-        struct nameidata nd;
+        struct path path;
        int error;
        if (sz != sizeof(*buf))
                return -EINVAL;
-        error = user_path_walk(path, &nd);
+        error = user_path(pathname, &path);
        if (!error) {
                struct kstatfs tmp;
-                error = vfs_statfs(nd.path.dentry, &tmp);
+                error = vfs_statfs(path.dentry, &tmp);
                if (!error)
                        error = put_compat_statfs64(buf, &tmp);
-                path_put(&nd.path);
+                path_put(&path);
        }
        return error;
 }
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index d755455e3bff..89209f00f9c7 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -465,7 +465,6 @@ static int ecryptfs_symlink(struct inode *dir, struct dentry *dentry,
        int rc;
        struct dentry *lower_dentry;
        struct dentry *lower_dir_dentry;
-        umode_t mode;
        char *encoded_symname;
        int encoded_symlen;
        struct ecryptfs_crypt_stat *crypt_stat = NULL;
@@ -473,7 +472,6 @@ static int ecryptfs_symlink(struct inode *dir, struct dentry *dentry,
        lower_dentry = ecryptfs_dentry_to_lower(dentry);
        dget(lower_dentry);
        lower_dir_dentry = lock_parent(lower_dentry);
-        mode = S_IALLUGO;
        encoded_symlen = ecryptfs_encode_filename(crypt_stat, symname,
                                                  strlen(symname),
                                                  &encoded_symname);
@@ -482,7 +480,7 @@ static int ecryptfs_symlink(struct inode *dir, struct dentry *dentry,
                goto out_lock;
        }
        rc = vfs_symlink(lower_dir_dentry->d_inode, lower_dentry,
-                         encoded_symname, mode);
+                         encoded_symname);
        kfree(encoded_symname);
        if (rc || !lower_dentry->d_inode)
                goto out_lock;
@@ -830,22 +828,9 @@ out:
 }
 static int
-ecryptfs_permission(struct inode *inode, int mask, struct nameidata *nd)
+ecryptfs_permission(struct inode *inode, int mask)
 {
-        int rc;
+        return inode_permission(ecryptfs_inode_to_lower(inode), mask);
-        if (nd) {
-                struct vfsmount *vfsmnt_save = nd->path.mnt;
-                struct dentry *dentry_save = nd->path.dentry;
-                nd->path.mnt = ecryptfs_dentry_to_lower_mnt(nd->path.dentry);
-                nd->path.dentry = ecryptfs_dentry_to_lower(nd->path.dentry);
-                rc = permission(ecryptfs_inode_to_lower(inode), mask, nd);
-                nd->path.mnt = vfsmnt_save;
-                nd->path.dentry = dentry_save;
-        } else
-                rc = permission(ecryptfs_inode_to_lower(inode), mask, NULL);
-        return rc;
 }
 /**
diff --git a/fs/exec.c b/fs/exec.c
index b8792a131533..9696bbf0f0b1 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -106,11 +106,17 @@ static inline void put_binfmt(struct linux_binfmt * fmt)
 */
 asmlinkage long sys_uselib(const char __user * library)
 {
-        struct file * file;
+        struct file *file;
        struct nameidata nd;
-        int error;
+        char *tmp = getname(library);
+        int error = PTR_ERR(tmp);
-        error = __user_path_lookup_open(library, LOOKUP_FOLLOW, &nd, FMODE_READ|FMODE_EXEC);
+        if (!IS_ERR(tmp)) {
+                error = path_lookup_open(AT_FDCWD, tmp,
+                                         LOOKUP_FOLLOW, &nd,
+                                         FMODE_READ|FMODE_EXEC);
+                putname(tmp);
+        }
        if (error)
                goto out;
@@ -118,7 +124,11 @@ asmlinkage long sys_uselib(const char __user * library)
        if (!S_ISREG(nd.path.dentry->d_inode->i_mode))
                goto exit;
-        error = vfs_permission(&nd, MAY_READ | MAY_EXEC);
+        error = -EACCES;
+        if (nd.path.mnt->mnt_flags & MNT_NOEXEC)
+                goto exit;
+        error = vfs_permission(&nd, MAY_READ | MAY_EXEC | MAY_OPEN);
        if (error)
                goto exit;
@@ -656,38 +666,43 @@ EXPORT_SYMBOL(setup_arg_pages);
 struct file *open_exec(const char *name)
 {
        struct nameidata nd;
-        int err;
        struct file *file;
+        int err;
-        err = path_lookup_open(AT_FDCWD, name, LOOKUP_FOLLOW, &nd, FMODE_READ|FMODE_EXEC);
+        err = path_lookup_open(AT_FDCWD, name, LOOKUP_FOLLOW, &nd,
-        file = ERR_PTR(err);
+                                FMODE_READ|FMODE_EXEC);
+        if (err)
-        if (!err) {
+                goto out;
-                struct inode *inode = nd.path.dentry->d_inode;
-                file = ERR_PTR(-EACCES);
+        err = -EACCES;
-                if (S_ISREG(inode->i_mode)) {
+        if (!S_ISREG(nd.path.dentry->d_inode->i_mode))
-                        int err = vfs_permission(&nd, MAY_EXEC);
+                goto out_path_put;
-                        file = ERR_PTR(err);
-                        if (!err) {
+        if (nd.path.mnt->mnt_flags & MNT_NOEXEC)
-                                file = nameidata_to_filp(&nd,
+                goto out_path_put;
-                                                        O_RDONLY|O_LARGEFILE);
-                                if (!IS_ERR(file)) {
+        err = vfs_permission(&nd, MAY_EXEC | MAY_OPEN);
-                                        err = deny_write_access(file);
+        if (err)
-                                        if (err) {
+                goto out_path_put;
-                                                fput(file);
-                                                file = ERR_PTR(err);
+        file = nameidata_to_filp(&nd, O_RDONLY|O_LARGEFILE);
-                                        }
+        if (IS_ERR(file))
-                                }
+                return file;
-out:
-                                return file;
+        err = deny_write_access(file);
-                        }
+        if (err) {
-                }
+                fput(file);
-                release_open_intent(&nd);
+                goto out;
-                path_put(&nd.path);
        }
-        goto out;
-}
+        return file;
+ out_path_put:
+        release_open_intent(&nd);
+        path_put(&nd.path);
+ out:
+        return ERR_PTR(err);
+}
 EXPORT_SYMBOL(open_exec);
 int kernel_read(struct file *file, unsigned long offset,
diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c
index e58669e1b87c..ae8c4f850b27 100644
--- a/fs/ext2/acl.c
+++ b/fs/ext2/acl.c
@@ -294,7 +294,7 @@ ext2_check_acl(struct inode *inode, int mask)
 }
 int
-ext2_permission(struct inode *inode, int mask, struct nameidata *nd)
+ext2_permission(struct inode *inode, int mask)
 {
        return generic_permission(inode, mask, ext2_check_acl);
 }
diff --git a/fs/ext2/acl.h b/fs/ext2/acl.h
index 0bde85bafe38..b42cf578554b 100644
--- a/fs/ext2/acl.h
+++ b/fs/ext2/acl.h
@@ -58,7 +58,7 @@ static inline int ext2_acl_count(size_t size)
 #define EXT2_ACL_NOT_CACHED ((void *)-1)
 /* acl.c */
-extern int ext2_permission (struct inode *, int, struct nameidata *);
+extern int ext2_permission (struct inode *, int);
 extern int ext2_acl_chmod (struct inode *);
 extern int ext2_init_acl (struct inode *, struct inode *);
diff --git a/fs/ext3/acl.c b/fs/ext3/acl.c
index a754d1848173..b60bb241880c 100644
--- a/fs/ext3/acl.c
+++ b/fs/ext3/acl.c
@@ -299,7 +299,7 @@ ext3_check_acl(struct inode *inode, int mask)
 }
 int
-ext3_permission(struct inode *inode, int mask, struct nameidata *nd)
+ext3_permission(struct inode *inode, int mask)
 {
        return generic_permission(inode, mask, ext3_check_acl);
 }
diff --git a/fs/ext3/acl.h b/fs/ext3/acl.h
index 0d1e6279cbfd..42da16b8cac0 100644
--- a/fs/ext3/acl.h
+++ b/fs/ext3/acl.h
@@ -58,7 +58,7 @@ static inline int ext3_acl_count(size_t size)
 #define EXT3_ACL_NOT_CACHED ((void *)-1)
 /* acl.c */
-extern int ext3_permission (struct inode *, int, struct nameidata *);
+extern int ext3_permission (struct inode *, int);
 extern int ext3_acl_chmod (struct inode *);
 extern int ext3_init_acl (handle_t *, struct inode *, struct inode *);
diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index 3c8dab880d91..c7d04e165446 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -299,7 +299,7 @@ ext4_check_acl(struct inode *inode, int mask)
 }
 int
-ext4_permission(struct inode *inode, int mask, struct nameidata *nd)
+ext4_permission(struct inode *inode, int mask)
 {
        return generic_permission(inode, mask, ext4_check_acl);
 }
diff --git a/fs/ext4/acl.h b/fs/ext4/acl.h
index 26a5c1abf147..cd2b855a07d6 100644
--- a/fs/ext4/acl.h
+++ b/fs/ext4/acl.h
@@ -58,7 +58,7 @@ static inline int ext4_acl_count(size_t size)
 #define EXT4_ACL_NOT_CACHED ((void *)-1)
 /* acl.c */
-extern int ext4_permission (struct inode *, int, struct nameidata *);
+extern int ext4_permission (struct inode *, int);
 extern int ext4_acl_chmod (struct inode *);
 extern int ext4_init_acl (handle_t *, struct inode *, struct inode *);
diff --git a/fs/fat/file.c b/fs/fat/file.c
index c672df4036e9..8707a8cfa02c 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -15,6 +15,8 @@
 #include <linux/writeback.h>
 #include <linux/backing-dev.h>
 #include <linux/blkdev.h>
+#include <linux/fsnotify.h>
+#include <linux/security.h>
 int fat_generic_ioctl(struct inode *inode, struct file *filp,
                      unsigned int cmd, unsigned long arg)
@@ -64,6 +66,7 @@ int fat_generic_ioctl(struct inode *inode, struct file *filp,
                /* Equivalent to a chmod() */
                ia.ia_valid = ATTR_MODE | ATTR_CTIME;
+                ia.ia_ctime = current_fs_time(inode->i_sb);
                if (is_dir) {
                        ia.ia_mode = MSDOS_MKMODE(attr,
                                S_IRWXUGO & ~sbi->options.fs_dmask)
@@ -90,11 +93,21 @@ int fat_generic_ioctl(struct inode *inode, struct file *filp,
                        }
                }
+                /*
+                 * The security check is questionable...  We single
+                 * out the RO attribute for checking by the security
+                 * module, just because it maps to a file mode.
+                 */
+                err = security_inode_setattr(filp->f_path.dentry, &ia);
+                if (err)
+                        goto up;
                /* This MUST be done before doing anything irreversible... */
-                err = notify_change(filp->f_path.dentry, &ia);
+                err = fat_setattr(filp->f_path.dentry, &ia);
                if (err)
                        goto up;
+                fsnotify_change(filp->f_path.dentry, ia.ia_valid);
                if (sbi->options.sys_immutable) {
                        if (attr & ATTR_SYS)
                                inode->i_flags |= S_IMMUTABLE;
diff --git a/fs/fcntl.c b/fs/fcntl.c
index 9679fcbdeaa0..61d625136813 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -64,11 +64,6 @@ static int locate_fd(unsigned int orig_start, int cloexec)
        struct fdtable *fdt;
        spin_lock(&files->file_lock);
-        error = -EINVAL;
-        if (orig_start >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
-                goto out;
 repeat:
        fdt = files_fdtable(files);
        /*
@@ -83,10 +78,6 @@ repeat:
        if (start < fdt->max_fds)
                newfd = find_next_zero_bit(fdt->open_fds->fds_bits,
                                           fdt->max_fds, start);
-        
-        error = -EMFILE;
-        if (newfd >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
-                goto out;
        error = expand_files(files, newfd);
        if (error < 0)
@@ -135,20 +126,20 @@ asmlinkage long sys_dup3(unsigned int oldfd, unsigned int newfd, int flags)
        if ((flags & ~O_CLOEXEC) != 0)
                return -EINVAL;
+        if (unlikely(oldfd == newfd))
+                return -EINVAL;
        spin_lock(&files->file_lock);
        if (!(file = fcheck(oldfd)))
                goto out_unlock;
-        err = newfd;
-        if (newfd == oldfd)
-                goto out_unlock;
-        err = -EBADF;
-        if (newfd >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
-                goto out_unlock;
        get_file(file);                 /* We are now finished with oldfd */
        err = expand_files(files, newfd);
-        if (err < 0)
+        if (unlikely(err < 0)) {
+                if (err == -EMFILE)
+                        err = -EBADF;
                goto out_fput;
+        }
        /* To avoid races with open() and dup(), we will mark the fd as
         * in-use in the open-file bitmap throughout the entire dup2()
@@ -189,6 +180,14 @@ out_fput:
 asmlinkage long sys_dup2(unsigned int oldfd, unsigned int newfd)
 {
+        if (unlikely(newfd == oldfd)) { /* corner case */
+                struct files_struct *files = current->files;
+                rcu_read_lock();
+                if (!fcheck_files(files, oldfd))
+                        oldfd = -EBADF;
+                rcu_read_unlock();
+                return oldfd;
+        }
        return sys_dup3(oldfd, newfd, 0);
 }
@@ -321,6 +320,8 @@ static long do_fcntl(int fd, unsigned int cmd, unsigned long arg,
        switch (cmd) {
        case F_DUPFD:
        case F_DUPFD_CLOEXEC:
+                if (arg >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
+                        break;
                get_file(filp);
                err = dupfd(filp, arg, cmd == F_DUPFD_CLOEXEC);
                break;
diff --git a/fs/fifo.c b/fs/fifo.c
index 9785e36f81e7..987bf9411495 100644
--- a/fs/fifo.c
+++ b/fs/fifo.c
@@ -57,7 +57,7 @@ static int fifo_open(struct inode *inode, struct file *filp)
         *  POSIX.1 says that O_NONBLOCK means return with the FIFO
         *  opened, even when there is no process writing the FIFO.
         */
-                filp->f_op = &read_fifo_fops;
+                filp->f_op = &read_pipefifo_fops;
                pipe->r_counter++;
                if (pipe->readers++ == 0)
                        wake_up_partner(inode);
@@ -86,7 +86,7 @@ static int fifo_open(struct inode *inode, struct file *filp)
                if ((filp->f_flags & O_NONBLOCK) && !pipe->readers)
                        goto err;
-                filp->f_op = &write_fifo_fops;
+                filp->f_op = &write_pipefifo_fops;
                pipe->w_counter++;
                if (!pipe->writers++)
                        wake_up_partner(inode);
@@ -105,7 +105,7 @@ static int fifo_open(struct inode *inode, struct file *filp)
         *  This implementation will NEVER block on a O_RDWR open, since
         *  the process can at least talk to itself.
         */
-                filp->f_op = &rdwr_fifo_fops;
+                filp->f_op = &rdwr_pipefifo_fops;
                pipe->readers++;
                pipe->writers++;
@@ -151,5 +151,5 @@ err_nocleanup:
 * depending on the access mode of the file...
 */
 const struct file_operations def_fifo_fops = {
-        .open           = fifo_open,    /* will set read or write pipe_fops */
+        .open           = fifo_open,    /* will set read_ or write_pipefifo_fops */
 };
diff --git a/fs/file.c b/fs/file.c
index 7b3887e054d0..d8773b19fe47 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -250,9 +250,18 @@ int expand_files(struct files_struct *files, int nr)
        struct fdtable *fdt;
        fdt = files_fdtable(files);
+        /*
+         * N.B. For clone tasks sharing a files structure, this test
+         * will limit the total number of files that can be opened.
+         */
+        if (nr >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
+                return -EMFILE;
        /* Do we need to expand? */
        if (nr < fdt->max_fds)
                return 0;
        /* Can we expand? */
        if (nr >= sysctl_nr_open)
                return -EMFILE;
diff --git a/fs/file_table.c b/fs/file_table.c
index 83084225b4c3..f45a4493f9e7 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -120,7 +120,7 @@ struct file *get_empty_filp(void)
        tsk = current;
        INIT_LIST_HEAD(&f->f_u.fu_list);
-        atomic_set(&f->f_count, 1);
+        atomic_long_set(&f->f_count, 1);
        rwlock_init(&f->f_owner.lock);
        f->f_uid = tsk->fsuid;
        f->f_gid = tsk->fsgid;
@@ -219,7 +219,7 @@ EXPORT_SYMBOL(init_file);
 void fput(struct file *file)
 {
-        if (atomic_dec_and_test(&file->f_count))
+        if (atomic_long_dec_and_test(&file->f_count))
                __fput(file);
 }
@@ -294,7 +294,7 @@ struct file *fget(unsigned int fd)
        rcu_read_lock();
        file = fcheck_files(files, fd);
        if (file) {
-                if (!atomic_inc_not_zero(&file->f_count)) {
+                if (!atomic_long_inc_not_zero(&file->f_count)) {
                        /* File object ref couldn't be taken */
                        rcu_read_unlock();
                        return NULL;
@@ -326,7 +326,7 @@ struct file *fget_light(unsigned int fd, int *fput_needed)
                rcu_read_lock();
                file = fcheck_files(files, fd);
                if (file) {
-                        if (atomic_inc_not_zero(&file->f_count))
+                        if (atomic_long_inc_not_zero(&file->f_count))
                                *fput_needed = 1;
                        else
                                /* Didn't get the reference, someone's freed */
@@ -341,7 +341,7 @@ struct file *fget_light(unsigned int fd, int *fput_needed)
 void put_filp(struct file *file)
 {
-        if (atomic_dec_and_test(&file->f_count)) {
+        if (atomic_long_dec_and_test(&file->f_count)) {
                security_file_free(file);
                file_kill(file);
                file_free(file);
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 51d0035ff07e..fd03330cadeb 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -898,7 +898,7 @@ static int fuse_access(struct inode *inode, int mask)
                return PTR_ERR(req);
        memset(&inarg, 0, sizeof(inarg));
-        inarg.mask = mask;
+        inarg.mask = mask & (MAY_READ | MAY_WRITE | MAY_EXEC);
        req->in.h.opcode = FUSE_ACCESS;
        req->in.h.nodeid = get_node_id(inode);
        req->in.numargs = 1;
@@ -927,7 +927,7 @@ static int fuse_access(struct inode *inode, int mask)
 * access request is sent.  Execute permission is still checked
 * locally based on file mode.
 */
-static int fuse_permission(struct inode *inode, int mask, struct nameidata *nd)
+static int fuse_permission(struct inode *inode, int mask)
 {
        struct fuse_conn *fc = get_fuse_conn(inode);
        bool refreshed = false;
@@ -962,7 +962,7 @@ static int fuse_permission(struct inode *inode, int mask, struct nameidata *nd)
                   exist.  So if permissions are revoked this won't be
                   noticed immediately, only after the attribute
                   timeout has expired */
-        } else if (nd && (nd->flags & (LOOKUP_ACCESS | LOOKUP_CHDIR))) {
+        } else if (mask & MAY_ACCESS) {
                err = fuse_access(inode, mask);
        } else if ((mask & MAY_EXEC) && S_ISREG(inode->i_mode)) {
                if (!(inode->i_mode & S_IXUGO)) {
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 67ff2c6a8f63..2bada6bbc317 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -893,7 +893,7 @@ static ssize_t fuse_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
        if (count == 0)
                goto out;
-        err = remove_suid(file->f_path.dentry);
+        err = file_remove_suid(file);
        if (err)
                goto out;
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 6da0ab355b8a..8b0806a32948 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -448,7 +448,7 @@ struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
        struct qstr qstr;
        struct inode *inode;
        gfs2_str2qstr(&qstr, name);
-        inode = gfs2_lookupi(dip, &qstr, 1, NULL);
+        inode = gfs2_lookupi(dip, &qstr, 1);
        /* gfs2_lookupi has inconsistent callers: vfs
         * related routines expect NULL for no entry found,
         * gfs2_lookup_simple callers expect ENOENT
@@ -477,7 +477,7 @@ struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
 */
 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
-                           int is_root, struct nameidata *nd)
+                           int is_root)
 {
        struct super_block *sb = dir->i_sb;
        struct gfs2_inode *dip = GFS2_I(dir);
@@ -1173,7 +1173,7 @@ int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
                        break;
                }
-                tmp = gfs2_lookupi(dir, &dotdot, 1, NULL);
+                tmp = gfs2_lookupi(dir, &dotdot, 1);
                if (IS_ERR(tmp)) {
                        error = PTR_ERR(tmp);
                        break;
diff --git a/fs/gfs2/inode.h b/fs/gfs2/inode.h
index 6074c2506f75..58f9607d6a86 100644
--- a/fs/gfs2/inode.h
+++ b/fs/gfs2/inode.h
@@ -83,7 +83,7 @@ int gfs2_inode_refresh(struct gfs2_inode *ip);
 int gfs2_dinode_dealloc(struct gfs2_inode *inode);
 int gfs2_change_nlink(struct gfs2_inode *ip, int diff);
 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
-                           int is_root, struct nameidata *nd);
+                           int is_root);
 struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
                           unsigned int mode, dev_t dev);
 int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,
diff --git a/fs/gfs2/ops_export.c b/fs/gfs2/ops_export.c
index 990d9f4bc463..9cda8536530c 100644
--- a/fs/gfs2/ops_export.c
+++ b/fs/gfs2/ops_export.c
@@ -134,7 +134,7 @@ static struct dentry *gfs2_get_parent(struct dentry *child)
        struct dentry *dentry;
        gfs2_str2qstr(&dotdot, "..");
-        inode = gfs2_lookupi(child->d_inode, &dotdot, 1, NULL);
+        inode = gfs2_lookupi(child->d_inode, &dotdot, 1);
        if (!inode)
                return ERR_PTR(-ENOENT);
diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index 1e252dfc5294..e2c62f73a778 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -74,7 +74,7 @@ static int gfs2_create(struct inode *dir, struct dentry *dentry,
                        return PTR_ERR(inode);
                }
-                inode = gfs2_lookupi(dir, &dentry->d_name, 0, nd);
+                inode = gfs2_lookupi(dir, &dentry->d_name, 0);
                if (inode) {
                        if (!IS_ERR(inode)) {
                                gfs2_holder_uninit(ghs);
@@ -109,7 +109,7 @@ static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
        dentry->d_op = &gfs2_dops;
-        inode = gfs2_lookupi(dir, &dentry->d_name, 0, nd);
+        inode = gfs2_lookupi(dir, &dentry->d_name, 0);
        if (inode && IS_ERR(inode))
                return ERR_CAST(inode);
@@ -915,12 +915,6 @@ int gfs2_permission(struct inode *inode, int mask)
        return error;
 }
-static int gfs2_iop_permission(struct inode *inode, int mask,
-                               struct nameidata *nd)
-{
-        return gfs2_permission(inode, mask);
-}
 static int setattr_size(struct inode *inode, struct iattr *attr)
 {
        struct gfs2_inode *ip = GFS2_I(inode);
@@ -1150,7 +1144,7 @@ static int gfs2_removexattr(struct dentry *dentry, const char *name)
 }
 const struct inode_operations gfs2_file_iops = {
-        .permission = gfs2_iop_permission,
+        .permission = gfs2_permission,
        .setattr = gfs2_setattr,
        .getattr = gfs2_getattr,
        .setxattr = gfs2_setxattr,
@@ -1169,7 +1163,7 @@ const struct inode_operations gfs2_dir_iops = {
        .rmdir = gfs2_rmdir,
        .mknod = gfs2_mknod,
        .rename = gfs2_rename,
-        .permission = gfs2_iop_permission,
+        .permission = gfs2_permission,
        .setattr = gfs2_setattr,
        .getattr = gfs2_getattr,
        .setxattr = gfs2_setxattr,
@@ -1181,7 +1175,7 @@ const struct inode_operations gfs2_dir_iops = {
 const struct inode_operations gfs2_symlink_iops = {
        .readlink = gfs2_readlink,
        .follow_link = gfs2_follow_link,
-        .permission = gfs2_iop_permission,
+        .permission = gfs2_permission,
        .setattr = gfs2_setattr,
        .getattr = gfs2_getattr,
        .setxattr = gfs2_setxattr,
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 63a8a902d9db..ca831991cbc2 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -389,7 +389,7 @@ int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh)
                        break;
                INIT_LIST_HEAD(&jd->extent_list);
-                jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1, NULL);
+                jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1);
                if (!jd->jd_inode || IS_ERR(jd->jd_inode)) {
                        if (!jd->jd_inode)
                                error = -ENOENT;
diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index dc4ec640e875..7e19835efa2e 100644
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -511,8 +511,7 @@ void hfs_clear_inode(struct inode *inode)
        }
 }
-static int hfs_permission(struct inode *inode, int mask,
+static int hfs_permission(struct inode *inode, int mask)
-                          struct nameidata *nd)
 {
        if (S_ISREG(inode->i_mode) && mask & MAY_EXEC)
                return 0;
@@ -523,8 +522,6 @@ static int hfs_file_open(struct inode *inode, struct file *file)
 {
        if (HFS_IS_RSRC(inode))
                inode = HFS_I(inode)->rsrc_inode;
-        if (atomic_read(&file->f_count) != 1)
-                return 0;
        atomic_inc(&HFS_I(inode)->opencnt);
        return 0;
 }
@@ -535,8 +532,6 @@ static int hfs_file_release(struct inode *inode, struct file *file)
        if (HFS_IS_RSRC(inode))
                inode = HFS_I(inode)->rsrc_inode;
-        if (atomic_read(&file->f_count) != 0)
-                return 0;
        if (atomic_dec_and_test(&HFS_I(inode)->opencnt)) {
                mutex_lock(&inode->i_mutex);
                hfs_file_truncate(inode);
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index cc3b5e24339b..b085d64a2b67 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -238,7 +238,7 @@ static void hfsplus_set_perms(struct inode *inode, struct hfsplus_perm *perms)
        perms->dev = cpu_to_be32(HFSPLUS_I(inode).dev);
 }
-static int hfsplus_permission(struct inode *inode, int mask, struct nameidata *nd)
+static int hfsplus_permission(struct inode *inode, int mask)
 {
        /* MAY_EXEC is also used for lookup, if no x bit is set allow lookup,
         * open_exec has the same test, so it's still not executable, if a x bit
@@ -254,8 +254,6 @@ static int hfsplus_file_open(struct inode *inode, struct file *file)
 {
        if (HFSPLUS_IS_RSRC(inode))
                inode = HFSPLUS_I(inode).rsrc_inode;
-        if (atomic_read(&file->f_count) != 1)
-                return 0;
        atomic_inc(&HFSPLUS_I(inode).opencnt);
        return 0;
 }
@@ -266,8 +264,6 @@ static int hfsplus_file_release(struct inode *inode, struct file *file)
        if (HFSPLUS_IS_RSRC(inode))
                inode = HFSPLUS_I(inode).rsrc_inode;
-        if (atomic_read(&file->f_count) != 0)
-                return 0;
        if (atomic_dec_and_test(&HFSPLUS_I(inode).opencnt)) {
                mutex_lock(&inode->i_mutex);
                hfsplus_file_truncate(inode);
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 5222345ddccf..d6ecabf4d231 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -822,7 +822,7 @@ int hostfs_rename(struct inode *from_ino, struct dentry *from,
        return err;
 }
-int hostfs_permission(struct inode *ino, int desired, struct nameidata *nd)
+int hostfs_permission(struct inode *ino, int desired)
 {
        char *name;
        int r = 0, w = 0, x = 0, err;
diff --git a/fs/hpfs/namei.c b/fs/hpfs/namei.c
index d256559b4104..d9c59a775449 100644
--- a/fs/hpfs/namei.c
+++ b/fs/hpfs/namei.c
@@ -415,7 +415,7 @@ again:
                d_drop(dentry);
                spin_lock(&dentry->d_lock);
                if (atomic_read(&dentry->d_count) > 1 ||
-                    permission(inode, MAY_WRITE, NULL) ||
+                    generic_permission(inode, MAY_WRITE, NULL) ||
                    !S_ISREG(inode->i_mode) ||
                    get_write_access(inode)) {
                        spin_unlock(&dentry->d_lock);
diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index 65077aa90f0a..2b3d1828db99 100644
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -655,20 +655,13 @@ static void *hppfs_follow_link(struct dentry *dentry, struct nameidata *nd)
        return proc_dentry->d_inode->i_op->follow_link(proc_dentry, nd);
 }
-int hppfs_permission(struct inode *inode, int mask, struct nameidata *nd)
-{
-        return generic_permission(inode, mask, NULL);
-}
 static const struct inode_operations hppfs_dir_iops = {
        .lookup         = hppfs_lookup,
-        .permission     = hppfs_permission,
 };
 static const struct inode_operations hppfs_link_iops = {
        .readlink       = hppfs_readlink,
        .follow_link    = hppfs_follow_link,
-        .permission     = hppfs_permission,
 };
 static struct inode *get_inode(struct super_block *sb, struct dentry *dentry)
diff --git a/fs/inotify_user.c b/fs/inotify_user.c
index fe79c25d95dc..60249429a253 100644
--- a/fs/inotify_user.c
+++ b/fs/inotify_user.c
@@ -354,20 +354,20 @@ static void inotify_dev_event_dequeue(struct inotify_device *dev)
 }
 /*
- * find_inode - resolve a user-given path to a specific inode and return a nd
+ * find_inode - resolve a user-given path to a specific inode
 */
-static int find_inode(const char __user *dirname, struct nameidata *nd,
+static int find_inode(const char __user *dirname, struct path *path,
                      unsigned flags)
 {
        int error;
-        error = __user_walk(dirname, flags, nd);
+        error = user_path_at(AT_FDCWD, dirname, flags, path);
        if (error)
                return error;
        /* you can only watch an inode if you have read permissions on it */
-        error = vfs_permission(nd, MAY_READ);
+        error = inode_permission(path->dentry->d_inode, MAY_READ);
        if (error)
-                path_put(&nd->path);
+                path_put(path);
        return error;
 }
@@ -650,11 +650,11 @@ asmlinkage long sys_inotify_init(void)
        return sys_inotify_init1(0);
 }
-asmlinkage long sys_inotify_add_watch(int fd, const char __user *path, u32 mask)
+asmlinkage long sys_inotify_add_watch(int fd, const char __user *pathname, u32 mask)
 {
        struct inode *inode;
        struct inotify_device *dev;
-        struct nameidata nd;
+        struct path path;
        struct file *filp;
        int ret, fput_needed;
        unsigned flags = 0;
@@ -674,12 +674,12 @@ asmlinkage long sys_inotify_add_watch(int fd, const char __user *path, u32 mask)
        if (mask & IN_ONLYDIR)
                flags |= LOOKUP_DIRECTORY;
-        ret = find_inode(path, &nd, flags);
+        ret = find_inode(pathname, &path, flags);
        if (unlikely(ret))
                goto fput_and_out;
-        /* inode held in place by reference to nd; dev by fget on fd */
+        /* inode held in place by reference to path; dev by fget on fd */
-        inode = nd.path.dentry->d_inode;
+        inode = path.dentry->d_inode;
        dev = filp->private_data;
        mutex_lock(&dev->up_mutex);
@@ -688,7 +688,7 @@ asmlinkage long sys_inotify_add_watch(int fd, const char __user *path, u32 mask)
                ret = create_watch(dev, inode, mask);
        mutex_unlock(&dev->up_mutex);
-        path_put(&nd.path);
+        path_put(&path);
 fput_and_out:
        fput_light(filp, fput_needed);
        return ret;
diff --git a/fs/jffs2/acl.c b/fs/jffs2/acl.c
index 4c80404a9aba..d98713777a1b 100644
--- a/fs/jffs2/acl.c
+++ b/fs/jffs2/acl.c
@@ -314,7 +314,7 @@ static int jffs2_check_acl(struct inode *inode, int mask)
        return -EAGAIN;
 }
-int jffs2_permission(struct inode *inode, int mask, struct nameidata *nd)
+int jffs2_permission(struct inode *inode, int mask)
 {
        return generic_permission(inode, mask, jffs2_check_acl);
 }
diff --git a/fs/jffs2/acl.h b/fs/jffs2/acl.h
index 0bb7f003fd80..8ca058aed384 100644
--- a/fs/jffs2/acl.h
+++ b/fs/jffs2/acl.h
@@ -28,7 +28,7 @@ struct jffs2_acl_header {
 #define JFFS2_ACL_NOT_CACHED ((void *)-1)
-extern int jffs2_permission(struct inode *, int, struct nameidata *);
+extern int jffs2_permission(struct inode *, int);
 extern int jffs2_acl_chmod(struct inode *);
 extern int jffs2_init_acl_pre(struct inode *, struct inode *, int *);
 extern int jffs2_init_acl_post(struct inode *);
diff --git a/fs/jfs/acl.c b/fs/jfs/acl.c
index 4d84bdc88299..d3e5c33665de 100644
--- a/fs/jfs/acl.c
+++ b/fs/jfs/acl.c
@@ -140,7 +140,7 @@ static int jfs_check_acl(struct inode *inode, int mask)
        return -EAGAIN;
 }
-int jfs_permission(struct inode *inode, int mask, struct nameidata *nd)
+int jfs_permission(struct inode *inode, int mask)
 {
        return generic_permission(inode, mask, jfs_check_acl);
 }
diff --git a/fs/jfs/jfs_acl.h b/fs/jfs/jfs_acl.h
index 455fa4292045..88475f10a389 100644
--- a/fs/jfs/jfs_acl.h
+++ b/fs/jfs/jfs_acl.h
@@ -20,7 +20,7 @@
 #ifdef CONFIG_JFS_POSIX_ACL
-int jfs_permission(struct inode *, int, struct nameidata *);
+int jfs_permission(struct inode *, int);
 int jfs_init_acl(tid_t, struct inode *, struct inode *);
 int jfs_setattr(struct dentry *, struct iattr *);
diff --git a/fs/namei.c b/fs/namei.c
index 01e67dddcc3d..a7b0a0b80128 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -31,7 +31,6 @@
 #include <linux/file.h>
 #include <linux/fcntl.h>
 #include <linux/device_cgroup.h>
-#include <asm/namei.h>
 #include <asm/uaccess.h>
 #define ACC_MODE(x) ("\000\004\002\006"[(x)&O_ACCMODE])
@@ -185,6 +184,8 @@ int generic_permission(struct inode *inode, int mask,
 {
        umode_t                 mode = inode->i_mode;
+        mask &= MAY_READ | MAY_WRITE | MAY_EXEC;
        if (current->fsuid == inode->i_uid)
                mode >>= 6;
        else {
@@ -203,7 +204,7 @@ int generic_permission(struct inode *inode, int mask,
        /*
         * If the DACs are ok we don't need any capability check.
         */
-        if (((mode & mask & (MAY_READ|MAY_WRITE|MAY_EXEC)) == mask))
+        if ((mask & ~mode) == 0)
                return 0;
 check_capabilities:
@@ -226,13 +227,9 @@ int generic_permission(struct inode *inode, int mask,
        return -EACCES;
 }
-int permission(struct inode *inode, int mask, struct nameidata *nd)
+int inode_permission(struct inode *inode, int mask)
 {
-        int retval, submask;
+        int retval;
-        struct vfsmount *mnt = NULL;
-        if (nd)
-                mnt = nd->path.mnt;
        if (mask & MAY_WRITE) {
                umode_t mode = inode->i_mode;
@@ -251,19 +248,9 @@ int permission(struct inode *inode, int mask, struct nameidata *nd)
                        return -EACCES;
        }
-        if ((mask & MAY_EXEC) && S_ISREG(inode->i_mode)) {
-                /*
-                 * MAY_EXEC on regular files is denied if the fs is mounted
-                 * with the "noexec" flag.
-                 */
-                if (mnt && (mnt->mnt_flags & MNT_NOEXEC))
-                        return -EACCES;
-        }
        /* Ordinary permission routines do not understand MAY_APPEND. */
-        submask = mask & ~MAY_APPEND;
        if (inode->i_op && inode->i_op->permission) {
-                retval = inode->i_op->permission(inode, submask, nd);
+                retval = inode->i_op->permission(inode, mask);
                if (!retval) {
                        /*
                         * Exec permission on a regular file is denied if none
@@ -277,7 +264,7 @@ int permission(struct inode *inode, int mask, struct nameidata *nd)
                                return -EACCES;
                }
        } else {
-                retval = generic_permission(inode, submask, NULL);
+                retval = generic_permission(inode, mask, NULL);
        }
        if (retval)
                return retval;
@@ -286,7 +273,8 @@ int permission(struct inode *inode, int mask, struct nameidata *nd)
        if (retval)
                return retval;
-        return security_inode_permission(inode, mask, nd);
+        return security_inode_permission(inode,
+                        mask & (MAY_READ|MAY_WRITE|MAY_EXEC));
 }
 /**
@@ -301,7 +289,7 @@ int permission(struct inode *inode, int mask, struct nameidata *nd)
 */
 int vfs_permission(struct nameidata *nd, int mask)
 {
-        return permission(nd->path.dentry->d_inode, mask, nd);
+        return inode_permission(nd->path.dentry->d_inode, mask);
 }
 /**
@@ -318,7 +306,7 @@ int vfs_permission(struct nameidata *nd, int mask)
 */
 int file_permission(struct file *file, int mask)
 {
-        return permission(file->f_path.dentry->d_inode, mask, NULL);
+        return inode_permission(file->f_path.dentry->d_inode, mask);
 }
 /*
@@ -459,8 +447,7 @@ static struct dentry * cached_lookup(struct dentry * parent, struct qstr * name,
 * short-cut DAC fails, then call permission() to do more
 * complete permission check.
 */
-static int exec_permission_lite(struct inode *inode,
+static int exec_permission_lite(struct inode *inode)
-                                       struct nameidata *nd)
 {
        umode_t mode = inode->i_mode;
@@ -486,7 +473,7 @@ static int exec_permission_lite(struct inode *inode,
        return -EACCES;
 ok:
-        return security_inode_permission(inode, MAY_EXEC, nd);
+        return security_inode_permission(inode, MAY_EXEC);
 }
 /*
@@ -519,7 +506,14 @@ static struct dentry * real_lookup(struct dentry * parent, struct qstr * name, s
         */
        result = d_lookup(parent, name);
        if (!result) {
-                struct dentry * dentry = d_alloc(parent, name);
+                struct dentry *dentry;
+                /* Don't create child dentry for a dead directory. */
+                result = ERR_PTR(-ENOENT);
+                if (IS_DEADDIR(dir))
+                        goto out_unlock;
+                dentry = d_alloc(parent, name);
                result = ERR_PTR(-ENOMEM);
                if (dentry) {
                        result = dir->i_op->lookup(dir, dentry, nd);
@@ -528,6 +522,7 @@ static struct dentry * real_lookup(struct dentry * parent, struct qstr * name, s
                        else
                                result = dentry;
                }
+out_unlock:
                mutex_unlock(&dir->i_mutex);
                return result;
        }
@@ -545,27 +540,16 @@ static struct dentry * real_lookup(struct dentry * parent, struct qstr * name, s
        return result;
 }
-static int __emul_lookup_dentry(const char *, struct nameidata *);
 /* SMP-safe */
-static __always_inline int
+static __always_inline void
 walk_init_root(const char *name, struct nameidata *nd)
 {
        struct fs_struct *fs = current->fs;
        read_lock(&fs->lock);
-        if (fs->altroot.dentry && !(nd->flags & LOOKUP_NOALT)) {
-                nd->path = fs->altroot;
-                path_get(&fs->altroot);
-                read_unlock(&fs->lock);
-                if (__emul_lookup_dentry(name,nd))
-                        return 0;
-                read_lock(&fs->lock);
-        }
        nd->path = fs->root;
        path_get(&fs->root);
        read_unlock(&fs->lock);
-        return 1;
 }
 /*
@@ -606,12 +590,9 @@ static __always_inline int __vfs_follow_link(struct nameidata *nd, const char *l
        if (*link == '/') {
                path_put(&nd->path);
-                if (!walk_init_root(link, nd))
+                walk_init_root(link, nd);
-                        /* weird __emul_prefix() stuff did it */
-                        goto out;
        }
        res = link_path_walk(link, nd);
-out:
        if (nd->depth || res || nd->last_type!=LAST_NORM)
                return res;
        /*
@@ -889,7 +870,7 @@ static int __link_path_walk(const char *name, struct nameidata *nd)
                unsigned int c;
                nd->flags |= LOOKUP_CONTINUE;
-                err = exec_permission_lite(inode, nd);
+                err = exec_permission_lite(inode);
                if (err == -EAGAIN)
                        err = vfs_permission(nd, MAY_EXEC);
                if (err)
@@ -1060,67 +1041,6 @@ static int path_walk(const char *name, struct nameidata *nd)
        return link_path_walk(name, nd);
 }
-/* 
- * SMP-safe: Returns 1 and nd will have valid dentry and mnt, if
- * everything is done. Returns 0 and drops input nd, if lookup failed;
- */
-static int __emul_lookup_dentry(const char *name, struct nameidata *nd)
-{
-        if (path_walk(name, nd))
-                return 0;               /* something went wrong... */
-        if (!nd->path.dentry->d_inode ||
-            S_ISDIR(nd->path.dentry->d_inode->i_mode)) {
-                struct path old_path = nd->path;
-                struct qstr last = nd->last;
-                int last_type = nd->last_type;
-                struct fs_struct *fs = current->fs;
-                /*
-                 * NAME was not found in alternate root or it's a directory.
-                 * Try to find it in the normal root:
-                 */
-                nd->last_type = LAST_ROOT;
-                read_lock(&fs->lock);
-                nd->path = fs->root;
-                path_get(&fs->root);
-                read_unlock(&fs->lock);
-                if (path_walk(name, nd) == 0) {
-                        if (nd->path.dentry->d_inode) {
-                                path_put(&old_path);
-                                return 1;
-                        }
-                        path_put(&nd->path);
-                }
-                nd->path = old_path;
-                nd->last = last;
-                nd->last_type = last_type;
-        }
-        return 1;
-}
-void set_fs_altroot(void)
-{
-        char *emul = __emul_prefix();
-        struct nameidata nd;
-        struct path path = {}, old_path;
-        int err;
-        struct fs_struct *fs = current->fs;
-        if (!emul)
-                goto set_it;
-        err = path_lookup(emul, LOOKUP_FOLLOW|LOOKUP_DIRECTORY|LOOKUP_NOALT, &nd);
-        if (!err)
-                path = nd.path;
-set_it:
-        write_lock(&fs->lock);
-        old_path = fs->altroot;
-        fs->altroot = path;
-        write_unlock(&fs->lock);
-        if (old_path.dentry)
-                path_put(&old_path);
-}
 /* Returns 0 and nd will be valid on success; Retuns error, otherwise. */
 static int do_path_lookup(int dfd, const char *name,
                                unsigned int flags, struct nameidata *nd)
@@ -1136,14 +1056,6 @@ static int do_path_lookup(int dfd, const char *name,
        if (*name=='/') {
                read_lock(&fs->lock);
-                if (fs->altroot.dentry && !(nd->flags & LOOKUP_NOALT)) {
-                        nd->path = fs->altroot;
-                        path_get(&fs->altroot);
-                        read_unlock(&fs->lock);
-                        if (__emul_lookup_dentry(name,nd))
-                                goto out; /* found in altroot */
-                        read_lock(&fs->lock);
-                }
                nd->path = fs->root;
                path_get(&fs->root);
                read_unlock(&fs->lock);
@@ -1177,7 +1089,6 @@ static int do_path_lookup(int dfd, const char *name,
        }
        retval = path_walk(name, nd);
-out:
        if (unlikely(!retval && !audit_dummy_context() && nd->path.dentry &&
                                nd->path.dentry->d_inode))
                audit_inode(name, nd->path.dentry);
@@ -1282,19 +1193,6 @@ static int path_lookup_create(int dfd, const char *name,
                        nd, open_flags, create_mode);
 }
-int __user_path_lookup_open(const char __user *name, unsigned int lookup_flags,
-                struct nameidata *nd, int open_flags)
-{
-        char *tmp = getname(name);
-        int err = PTR_ERR(tmp);
-        if (!IS_ERR(tmp)) {
-                err = __path_lookup_intent_open(AT_FDCWD, tmp, lookup_flags, nd, open_flags, 0);
-                putname(tmp);
-        }
-        return err;
-}
 static struct dentry *__lookup_hash(struct qstr *name,
                struct dentry *base, struct nameidata *nd)
 {
@@ -1317,7 +1215,14 @@ static struct dentry *__lookup_hash(struct qstr *name,
        dentry = cached_lookup(base, name, nd);
        if (!dentry) {
-                struct dentry *new = d_alloc(base, name);
+                struct dentry *new;
+                /* Don't create child dentry for a dead directory. */
+                dentry = ERR_PTR(-ENOENT);
+                if (IS_DEADDIR(inode))
+                        goto out;
+                new = d_alloc(base, name);
                dentry = ERR_PTR(-ENOMEM);
                if (!new)
                        goto out;
@@ -1340,7 +1245,7 @@ static struct dentry *lookup_hash(struct nameidata *nd)
 {
        int err;
-        err = permission(nd->path.dentry->d_inode, MAY_EXEC, nd);
+        err = inode_permission(nd->path.dentry->d_inode, MAY_EXEC);
        if (err)
                return ERR_PTR(err);
        return __lookup_hash(&nd->last, nd->path.dentry, nd);
@@ -1388,7 +1293,7 @@ struct dentry *lookup_one_len(const char *name, struct dentry *base, int len)
        if (err)
                return ERR_PTR(err);
-        err = permission(base->d_inode, MAY_EXEC, NULL);
+        err = inode_permission(base->d_inode, MAY_EXEC);
        if (err)
                return ERR_PTR(err);
        return __lookup_hash(&this, base, NULL);
@@ -1416,22 +1321,40 @@ struct dentry *lookup_one_noperm(const char *name, struct dentry *base)
        return __lookup_hash(&this, base, NULL);
 }
-int __user_walk_fd(int dfd, const char __user *name, unsigned flags,
+int user_path_at(int dfd, const char __user *name, unsigned flags,
-                            struct nameidata *nd)
+                 struct path *path)
 {
+        struct nameidata nd;
        char *tmp = getname(name);
        int err = PTR_ERR(tmp);
        if (!IS_ERR(tmp)) {
-                err = do_path_lookup(dfd, tmp, flags, nd);
+                BUG_ON(flags & LOOKUP_PARENT);
+                err = do_path_lookup(dfd, tmp, flags, &nd);
                putname(tmp);
+                if (!err)
+                        *path = nd.path;
        }
        return err;
 }
-int __user_walk(const char __user *name, unsigned flags, struct nameidata *nd)
+static int user_path_parent(int dfd, const char __user *path,
+                        struct nameidata *nd, char **name)
 {
-        return __user_walk_fd(AT_FDCWD, name, flags, nd);
+        char *s = getname(path);
+        int error;
+        if (IS_ERR(s))
+                return PTR_ERR(s);
+        error = do_path_lookup(dfd, s, LOOKUP_PARENT, nd);
+        if (error)
+                putname(s);
+        else
+                *name = s;
+        return error;
 }
 /*
@@ -1478,7 +1401,7 @@ static int may_delete(struct inode *dir,struct dentry *victim,int isdir)
        BUG_ON(victim->d_parent->d_inode != dir);
        audit_inode_child(victim->d_name.name, victim, dir);
-        error = permission(dir,MAY_WRITE | MAY_EXEC, NULL);
+        error = inode_permission(dir, MAY_WRITE | MAY_EXEC);
        if (error)
                return error;
        if (IS_APPEND(dir))
@@ -1515,7 +1438,7 @@ static inline int may_create(struct inode *dir, struct dentry *child,
                return -EEXIST;
        if (IS_DEADDIR(dir))
                return -ENOENT;
-        return permission(dir,MAY_WRITE | MAY_EXEC, nd);
+        return inode_permission(dir, MAY_WRITE | MAY_EXEC);
 }
 /* 
@@ -1755,7 +1678,7 @@ struct file *do_filp_open(int dfd, const char *pathname,
        int will_write;
        int flag = open_to_namei_flags(open_flag);
-        acc_mode = ACC_MODE(flag);
+        acc_mode = MAY_OPEN | ACC_MODE(flag);
        /* O_TRUNC implies we need access checks for write permissions */
        if (flag & O_TRUNC)
@@ -2071,20 +1994,18 @@ static int may_mknod(mode_t mode)
 asmlinkage long sys_mknodat(int dfd, const char __user *filename, int mode,
                                unsigned dev)
 {
-        int error = 0;
+        int error;
-        char * tmp;
+        char *tmp;
-        struct dentry * dentry;
+        struct dentry *dentry;
        struct nameidata nd;
        if (S_ISDIR(mode))
                return -EPERM;
-        tmp = getname(filename);
-        if (IS_ERR(tmp))
-                return PTR_ERR(tmp);
-        error = do_path_lookup(dfd, tmp, LOOKUP_PARENT, &nd);
+        error = user_path_parent(dfd, filename, &nd, &tmp);
        if (error)
-                goto out;
+                return error;
        dentry = lookup_create(&nd, 0);
        if (IS_ERR(dentry)) {
                error = PTR_ERR(dentry);
@@ -2116,7 +2037,6 @@ out_dput:
 out_unlock:
        mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
        path_put(&nd.path);
-out:
        putname(tmp);
        return error;
@@ -2156,14 +2076,10 @@ asmlinkage long sys_mkdirat(int dfd, const char __user *pathname, int mode)
        struct dentry *dentry;
        struct nameidata nd;
-        tmp = getname(pathname);
+        error = user_path_parent(dfd, pathname, &nd, &tmp);
-        error = PTR_ERR(tmp);
+        if (error)
-        if (IS_ERR(tmp))
                goto out_err;
-        error = do_path_lookup(dfd, tmp, LOOKUP_PARENT, &nd);
-        if (error)
-                goto out;
        dentry = lookup_create(&nd, 1);
        error = PTR_ERR(dentry);
        if (IS_ERR(dentry))
@@ -2181,7 +2097,6 @@ out_dput:
 out_unlock:
        mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
        path_put(&nd.path);
-out:
        putname(tmp);
 out_err:
        return error;
@@ -2259,13 +2174,9 @@ static long do_rmdir(int dfd, const char __user *pathname)
        struct dentry *dentry;
        struct nameidata nd;
-        name = getname(pathname);
+        error = user_path_parent(dfd, pathname, &nd, &name);
-        if(IS_ERR(name))
-                return PTR_ERR(name);
-        error = do_path_lookup(dfd, name, LOOKUP_PARENT, &nd);
        if (error)
-                goto exit;
+                return error;
        switch(nd.last_type) {
                case LAST_DOTDOT:
@@ -2294,7 +2205,6 @@ exit2:
        mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
 exit1:
        path_put(&nd.path);
-exit:
        putname(name);
        return error;
 }
@@ -2343,19 +2253,16 @@ int vfs_unlink(struct inode *dir, struct dentry *dentry)
 */
 static long do_unlinkat(int dfd, const char __user *pathname)
 {
-        int error = 0;
+        int error;
-        char * name;
+        char *name;
        struct dentry *dentry;
        struct nameidata nd;
        struct inode *inode = NULL;
-        name = getname(pathname);
+        error = user_path_parent(dfd, pathname, &nd, &name);
-        if(IS_ERR(name))
-                return PTR_ERR(name);
-        error = do_path_lookup(dfd, name, LOOKUP_PARENT, &nd);
        if (error)
-                goto exit;
+                return error;
        error = -EISDIR;
        if (nd.last_type != LAST_NORM)
                goto exit1;
@@ -2382,7 +2289,6 @@ static long do_unlinkat(int dfd, const char __user *pathname)
                iput(inode);    /* truncate the inode here */
 exit1:
        path_put(&nd.path);
-exit:
        putname(name);
        return error;
@@ -2408,7 +2314,7 @@ asmlinkage long sys_unlink(const char __user *pathname)
        return do_unlinkat(AT_FDCWD, pathname);
 }
-int vfs_symlink(struct inode *dir, struct dentry *dentry, const char *oldname, int mode)
+int vfs_symlink(struct inode *dir, struct dentry *dentry, const char *oldname)
 {
        int error = may_create(dir, dentry, NULL);
@@ -2432,23 +2338,20 @@ int vfs_symlink(struct inode *dir, struct dentry *dentry, const char *oldname, i
 asmlinkage long sys_symlinkat(const char __user *oldname,
                              int newdfd, const char __user *newname)
 {
-        int error = 0;
+        int error;
-        char * from;
+        char *from;
-        char * to;
+        char *to;
        struct dentry *dentry;
        struct nameidata nd;
        from = getname(oldname);
-        if(IS_ERR(from))
+        if (IS_ERR(from))
                return PTR_ERR(from);
-        to = getname(newname);
-        error = PTR_ERR(to);
-        if (IS_ERR(to))
-                goto out_putname;
-        error = do_path_lookup(newdfd, to, LOOKUP_PARENT, &nd);
+        error = user_path_parent(newdfd, newname, &nd, &to);
        if (error)
-                goto out;
+                goto out_putname;
        dentry = lookup_create(&nd, 0);
        error = PTR_ERR(dentry);
        if (IS_ERR(dentry))
@@ -2457,14 +2360,13 @@ asmlinkage long sys_symlinkat(const char __user *oldname,
        error = mnt_want_write(nd.path.mnt);
        if (error)
                goto out_dput;
-        error = vfs_symlink(nd.path.dentry->d_inode, dentry, from, S_IALLUGO);
+        error = vfs_symlink(nd.path.dentry->d_inode, dentry, from);
        mnt_drop_write(nd.path.mnt);
 out_dput:
        dput(dentry);
 out_unlock:
        mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
        path_put(&nd.path);
-out:
        putname(to);
 out_putname:
        putname(from);
@@ -2498,19 +2400,19 @@ int vfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_de
                return -EPERM;
        if (!dir->i_op || !dir->i_op->link)
                return -EPERM;
-        if (S_ISDIR(old_dentry->d_inode->i_mode))
+        if (S_ISDIR(inode->i_mode))
                return -EPERM;
        error = security_inode_link(old_dentry, dir, new_dentry);
        if (error)
                return error;
-        mutex_lock(&old_dentry->d_inode->i_mutex);
+        mutex_lock(&inode->i_mutex);
        DQUOT_INIT(dir);
        error = dir->i_op->link(old_dentry, dir, new_dentry);
-        mutex_unlock(&old_dentry->d_inode->i_mutex);
+        mutex_unlock(&inode->i_mutex);
        if (!error)
-                fsnotify_link(dir, old_dentry->d_inode, new_dentry);
+                fsnotify_link(dir, inode, new_dentry);
        return error;
 }
@@ -2528,27 +2430,25 @@ asmlinkage long sys_linkat(int olddfd, const char __user *oldname,
                           int flags)
 {
        struct dentry *new_dentry;
-        struct nameidata nd, old_nd;
+        struct nameidata nd;
+        struct path old_path;
        int error;
-        char * to;
+        char *to;
        if ((flags & ~AT_SYMLINK_FOLLOW) != 0)
                return -EINVAL;
-        to = getname(newname);
+        error = user_path_at(olddfd, oldname,
-        if (IS_ERR(to))
+                             flags & AT_SYMLINK_FOLLOW ? LOOKUP_FOLLOW : 0,
-                return PTR_ERR(to);
+                             &old_path);
-        error = __user_walk_fd(olddfd, oldname,
-                               flags & AT_SYMLINK_FOLLOW ? LOOKUP_FOLLOW : 0,
-                               &old_nd);
        if (error)
-                goto exit;
+                return error;
-        error = do_path_lookup(newdfd, to, LOOKUP_PARENT, &nd);
+        error = user_path_parent(newdfd, newname, &nd, &to);
        if (error)
                goto out;
        error = -EXDEV;
-        if (old_nd.path.mnt != nd.path.mnt)
+        if (old_path.mnt != nd.path.mnt)
                goto out_release;
        new_dentry = lookup_create(&nd, 0);
        error = PTR_ERR(new_dentry);
@@ -2557,7 +2457,7 @@ asmlinkage long sys_linkat(int olddfd, const char __user *oldname,
        error = mnt_want_write(nd.path.mnt);
        if (error)
                goto out_dput;
-        error = vfs_link(old_nd.path.dentry, nd.path.dentry->d_inode, new_dentry);
+        error = vfs_link(old_path.dentry, nd.path.dentry->d_inode, new_dentry);
        mnt_drop_write(nd.path.mnt);
 out_dput:
        dput(new_dentry);
@@ -2565,10 +2465,9 @@ out_unlock:
        mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
 out_release:
        path_put(&nd.path);
-out:
-        path_put(&old_nd.path);
-exit:
        putname(to);
+out:
+        path_put(&old_path);
        return error;
 }
@@ -2621,7 +2520,7 @@ static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry,
         * we'll need to flip '..'.
         */
        if (new_dir != old_dir) {
-                error = permission(old_dentry->d_inode, MAY_WRITE, NULL);
+                error = inode_permission(old_dentry->d_inode, MAY_WRITE);
                if (error)
                        return error;
        }
@@ -2724,20 +2623,22 @@ int vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
        return error;
 }
-static int do_rename(int olddfd, const char *oldname,
+asmlinkage long sys_renameat(int olddfd, const char __user *oldname,
-                        int newdfd, const char *newname)
+                             int newdfd, const char __user *newname)
 {
-        int error = 0;
+        struct dentry *old_dir, *new_dir;
-        struct dentry * old_dir, * new_dir;
+        struct dentry *old_dentry, *new_dentry;
-        struct dentry * old_dentry, *new_dentry;
+        struct dentry *trap;
-        struct dentry * trap;
        struct nameidata oldnd, newnd;
+        char *from;
+        char *to;
+        int error;
-        error = do_path_lookup(olddfd, oldname, LOOKUP_PARENT, &oldnd);
+        error = user_path_parent(olddfd, oldname, &oldnd, &from);
        if (error)
                goto exit;
-        error = do_path_lookup(newdfd, newname, LOOKUP_PARENT, &newnd);
+        error = user_path_parent(newdfd, newname, &newnd, &to);
        if (error)
                goto exit1;
@@ -2799,29 +2700,11 @@ exit3:
        unlock_rename(new_dir, old_dir);
 exit2:
        path_put(&newnd.path);
+        putname(to);
 exit1:
        path_put(&oldnd.path);
-exit:
-        return error;
-}
-asmlinkage long sys_renameat(int olddfd, const char __user *oldname,
-                             int newdfd, const char __user *newname)
-{
-        int error;
-        char * from;
-        char * to;
-        from = getname(oldname);
-        if(IS_ERR(from))
-                return PTR_ERR(from);
-        to = getname(newname);
-        error = PTR_ERR(to);
-        if (!IS_ERR(to)) {
-                error = do_rename(olddfd, from, newdfd, to);
-                putname(to);
-        }
        putname(from);
+exit:
        return error;
 }
@@ -2959,8 +2842,7 @@ const struct inode_operations page_symlink_inode_operations = {
        .put_link       = page_put_link,
 };
-EXPORT_SYMBOL(__user_walk);
+EXPORT_SYMBOL(user_path_at);
-EXPORT_SYMBOL(__user_walk_fd);
 EXPORT_SYMBOL(follow_down);
 EXPORT_SYMBOL(follow_up);
 EXPORT_SYMBOL(get_write_access); /* binfmt_aout */
@@ -2975,7 +2857,7 @@ EXPORT_SYMBOL(page_symlink);
 EXPORT_SYMBOL(page_symlink_inode_operations);
 EXPORT_SYMBOL(path_lookup);
 EXPORT_SYMBOL(vfs_path_lookup);
-EXPORT_SYMBOL(permission);
+EXPORT_SYMBOL(inode_permission);
 EXPORT_SYMBOL(vfs_permission);
 EXPORT_SYMBOL(file_permission);
 EXPORT_SYMBOL(unlock_rename);
diff --git a/fs/namespace.c b/fs/namespace.c
index f30b11e2240e..411728c0c8bb 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -112,9 +112,13 @@ struct vfsmount *alloc_vfsmnt(const char *name)
                int err;
                err = mnt_alloc_id(mnt);
-                if (err) {
+                if (err)
-                        kmem_cache_free(mnt_cache, mnt);
+                        goto out_free_cache;
-                        return NULL;
+                if (name) {
+                        mnt->mnt_devname = kstrdup(name, GFP_KERNEL);
+                        if (!mnt->mnt_devname)
+                                goto out_free_id;
                }
                atomic_set(&mnt->mnt_count, 1);
@@ -127,16 +131,14 @@ struct vfsmount *alloc_vfsmnt(const char *name)
                INIT_LIST_HEAD(&mnt->mnt_slave_list);
                INIT_LIST_HEAD(&mnt->mnt_slave);
                atomic_set(&mnt->__mnt_writers, 0);
-                if (name) {
-                        int size = strlen(name) + 1;
-                        char *newname = kmalloc(size, GFP_KERNEL);
-                        if (newname) {
-                                memcpy(newname, name, size);
-                                mnt->mnt_devname = newname;
-                        }
-                }
        }
        return mnt;
+out_free_id:
+        mnt_free_id(mnt);
+out_free_cache:
+        kmem_cache_free(mnt_cache, mnt);
+        return NULL;
 }
 /*
@@ -1128,27 +1130,27 @@ static int do_umount(struct vfsmount *mnt, int flags)
 asmlinkage long sys_umount(char __user * name, int flags)
 {
-        struct nameidata nd;
+        struct path path;
        int retval;
-        retval = __user_walk(name, LOOKUP_FOLLOW, &nd);
+        retval = user_path(name, &path);
        if (retval)
                goto out;
        retval = -EINVAL;
-        if (nd.path.dentry != nd.path.mnt->mnt_root)
+        if (path.dentry != path.mnt->mnt_root)
                goto dput_and_out;
-        if (!check_mnt(nd.path.mnt))
+        if (!check_mnt(path.mnt))
                goto dput_and_out;
        retval = -EPERM;
        if (!capable(CAP_SYS_ADMIN))
                goto dput_and_out;
-        retval = do_umount(nd.path.mnt, flags);
+        retval = do_umount(path.mnt, flags);
 dput_and_out:
        /* we mustn't call path_put() as that would clear mnt_expiry_mark */
-        dput(nd.path.dentry);
+        dput(path.dentry);
-        mntput_no_expire(nd.path.mnt);
+        mntput_no_expire(path.mnt);
 out:
        return retval;
 }
@@ -1972,7 +1974,7 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
                struct fs_struct *fs)
 {
        struct mnt_namespace *new_ns;
-        struct vfsmount *rootmnt = NULL, *pwdmnt = NULL, *altrootmnt = NULL;
+        struct vfsmount *rootmnt = NULL, *pwdmnt = NULL;
        struct vfsmount *p, *q;
        new_ns = kmalloc(sizeof(struct mnt_namespace), GFP_KERNEL);
@@ -2015,10 +2017,6 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
                                pwdmnt = p;
                                fs->pwd.mnt = mntget(q);
                        }
-                        if (p == fs->altroot.mnt) {
-                                altrootmnt = p;
-                                fs->altroot.mnt = mntget(q);
-                        }
                }
                p = next_mnt(p, mnt_ns->root);
                q = next_mnt(q, new_ns->root);
@@ -2029,8 +2027,6 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
                mntput(rootmnt);
        if (pwdmnt)
                mntput(pwdmnt);
-        if (altrootmnt)
-                mntput(altrootmnt);
        return new_ns;
 }
@@ -2183,28 +2179,26 @@ asmlinkage long sys_pivot_root(const char __user * new_root,
                               const char __user * put_old)
 {
        struct vfsmount *tmp;
-        struct nameidata new_nd, old_nd;
+        struct path new, old, parent_path, root_parent, root;
-        struct path parent_path, root_parent, root;
        int error;
        if (!capable(CAP_SYS_ADMIN))
                return -EPERM;
-        error = __user_walk(new_root, LOOKUP_FOLLOW | LOOKUP_DIRECTORY,
+        error = user_path_dir(new_root, &new);
-                            &new_nd);
        if (error)
                goto out0;
        error = -EINVAL;
-        if (!check_mnt(new_nd.path.mnt))
+        if (!check_mnt(new.mnt))
                goto out1;
-        error = __user_walk(put_old, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &old_nd);
+        error = user_path_dir(put_old, &old);
        if (error)
                goto out1;
-        error = security_sb_pivotroot(&old_nd.path, &new_nd.path);
+        error = security_sb_pivotroot(&old, &new);
        if (error) {
-                path_put(&old_nd.path);
+                path_put(&old);
                goto out1;
        }
@@ -2213,69 +2207,69 @@ asmlinkage long sys_pivot_root(const char __user * new_root,
        path_get(&current->fs->root);
        read_unlock(&current->fs->lock);
        down_write(&namespace_sem);
-        mutex_lock(&old_nd.path.dentry->d_inode->i_mutex);
+        mutex_lock(&old.dentry->d_inode->i_mutex);
        error = -EINVAL;
-        if (IS_MNT_SHARED(old_nd.path.mnt) ||
+        if (IS_MNT_SHARED(old.mnt) ||
-                IS_MNT_SHARED(new_nd.path.mnt->mnt_parent) ||
+                IS_MNT_SHARED(new.mnt->mnt_parent) ||
                IS_MNT_SHARED(root.mnt->mnt_parent))
                goto out2;
        if (!check_mnt(root.mnt))
                goto out2;
        error = -ENOENT;
-        if (IS_DEADDIR(new_nd.path.dentry->d_inode))
+        if (IS_DEADDIR(new.dentry->d_inode))
                goto out2;
-        if (d_unhashed(new_nd.path.dentry) && !IS_ROOT(new_nd.path.dentry))
+        if (d_unhashed(new.dentry) && !IS_ROOT(new.dentry))
                goto out2;
-        if (d_unhashed(old_nd.path.dentry) && !IS_ROOT(old_nd.path.dentry))
+        if (d_unhashed(old.dentry) && !IS_ROOT(old.dentry))
                goto out2;
        error = -EBUSY;
-        if (new_nd.path.mnt == root.mnt ||
+        if (new.mnt == root.mnt ||
-            old_nd.path.mnt == root.mnt)
+            old.mnt == root.mnt)
                goto out2; /* loop, on the same file system  */
        error = -EINVAL;
        if (root.mnt->mnt_root != root.dentry)
                goto out2; /* not a mountpoint */
        if (root.mnt->mnt_parent == root.mnt)
                goto out2; /* not attached */
-        if (new_nd.path.mnt->mnt_root != new_nd.path.dentry)
+        if (new.mnt->mnt_root != new.dentry)
                goto out2; /* not a mountpoint */
-        if (new_nd.path.mnt->mnt_parent == new_nd.path.mnt)
+        if (new.mnt->mnt_parent == new.mnt)
                goto out2; /* not attached */
        /* make sure we can reach put_old from new_root */
-        tmp = old_nd.path.mnt;
+        tmp = old.mnt;
        spin_lock(&vfsmount_lock);
-        if (tmp != new_nd.path.mnt) {
+        if (tmp != new.mnt) {
                for (;;) {
                        if (tmp->mnt_parent == tmp)
                                goto out3; /* already mounted on put_old */
-                        if (tmp->mnt_parent == new_nd.path.mnt)
+                        if (tmp->mnt_parent == new.mnt)
                                break;
                        tmp = tmp->mnt_parent;
                }
-                if (!is_subdir(tmp->mnt_mountpoint, new_nd.path.dentry))
+                if (!is_subdir(tmp->mnt_mountpoint, new.dentry))
                        goto out3;
-        } else if (!is_subdir(old_nd.path.dentry, new_nd.path.dentry))
+        } else if (!is_subdir(old.dentry, new.dentry))
                goto out3;
-        detach_mnt(new_nd.path.mnt, &parent_path);
+        detach_mnt(new.mnt, &parent_path);
        detach_mnt(root.mnt, &root_parent);
        /* mount old root on put_old */
-        attach_mnt(root.mnt, &old_nd.path);
+        attach_mnt(root.mnt, &old);
        /* mount new_root on / */
-        attach_mnt(new_nd.path.mnt, &root_parent);
+        attach_mnt(new.mnt, &root_parent);
        touch_mnt_namespace(current->nsproxy->mnt_ns);
        spin_unlock(&vfsmount_lock);
-        chroot_fs_refs(&root, &new_nd.path);
+        chroot_fs_refs(&root, &new);
-        security_sb_post_pivotroot(&root, &new_nd.path);
+        security_sb_post_pivotroot(&root, &new);
        error = 0;
        path_put(&root_parent);
        path_put(&parent_path);
 out2:
-        mutex_unlock(&old_nd.path.dentry->d_inode->i_mutex);
+        mutex_unlock(&old.dentry->d_inode->i_mutex);
        up_write(&namespace_sem);
        path_put(&root);
-        path_put(&old_nd.path);
+        path_put(&old);
 out1:
-        path_put(&new_nd.path);
+        path_put(&new);
 out0:
        return error;
 out3:
diff --git a/fs/ncpfs/dir.c b/fs/ncpfs/dir.c
index 011ef0b6d2d4..07e9715b8658 100644
--- a/fs/ncpfs/dir.c
+++ b/fs/ncpfs/dir.c
@@ -266,7 +266,7 @@ leave_me:;
 static int
-__ncp_lookup_validate(struct dentry * dentry, struct nameidata *nd)
+__ncp_lookup_validate(struct dentry *dentry)
 {
        struct ncp_server *server;
        struct dentry *parent;
@@ -340,7 +340,7 @@ ncp_lookup_validate(struct dentry * dentry, struct nameidata *nd)
 {
        int res;
        lock_kernel();
-        res = __ncp_lookup_validate(dentry, nd);
+        res = __ncp_lookup_validate(dentry);
        unlock_kernel();
        return res;
 }
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 28a238dab23a..74f92b717f78 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1884,7 +1884,7 @@ static int nfs_do_access(struct inode *inode, struct rpc_cred *cred, int mask)
                return status;
        nfs_access_add_cache(inode, &cache);
 out:
-        if ((cache.mask & mask) == mask)
+        if ((mask & ~cache.mask & (MAY_READ | MAY_WRITE | MAY_EXEC)) == 0)
                return 0;
        return -EACCES;
 }
@@ -1907,17 +1907,17 @@ int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags)
        return nfs_do_access(inode, cred, nfs_open_permission_mask(openflags));
 }
-int nfs_permission(struct inode *inode, int mask, struct nameidata *nd)
+int nfs_permission(struct inode *inode, int mask)
 {
        struct rpc_cred *cred;
        int res = 0;
        nfs_inc_stats(inode, NFSIOS_VFSACCESS);
-        if (mask == 0)
+        if ((mask & (MAY_READ | MAY_WRITE | MAY_EXEC)) == 0)
                goto out;
        /* Is this sys_access() ? */
-        if (nd != NULL && (nd->flags & LOOKUP_ACCESS))
+        if (mask & MAY_ACCESS)
                goto force_lookup;
        switch (inode->i_mode & S_IFMT) {
@@ -1926,8 +1926,7 @@ int nfs_permission(struct inode *inode, int mask, struct nameidata *nd)
                case S_IFREG:
                        /* NFSv4 has atomic_open... */
                        if (nfs_server_capable(inode, NFS_CAP_ATOMIC_OPEN)
-                                        && nd != NULL
+                                        && (mask & MAY_OPEN))
-                                        && (nd->flags & LOOKUP_OPEN))
                                goto out;
                        break;
                case S_IFDIR:
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 1955a2702e60..c53e65f8f3a2 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -12,6 +12,7 @@
 #include <linux/time.h>
 #include <linux/errno.h>
 #include <linux/fs.h>
+#include <linux/namei.h>
 #include <linux/fcntl.h>
 #include <linux/net.h>
 #include <linux/in.h>
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index f45451eb1e38..ea37c96f0445 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -51,7 +51,7 @@ static int nfsd_acceptable(void *expv, struct dentry *dentry)
                /* make sure parents give x permission to user */
                int err;
                parent = dget_parent(tdentry);
-                err = permission(parent->d_inode, MAY_EXEC, NULL);
+                err = inode_permission(parent->d_inode, MAY_EXEC);
                if (err < 0) {
                        dput(parent);
                        break;
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 0f4481e0502d..18060bed5267 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1516,7 +1516,6 @@ nfsd_symlink(struct svc_rqst *rqstp, struct svc_fh *fhp,
        struct dentry   *dentry, *dnew;
        __be32          err, cerr;
        int             host_err;
-        umode_t         mode;
        err = nfserr_noent;
        if (!flen || !plen)
@@ -1535,11 +1534,6 @@ nfsd_symlink(struct svc_rqst *rqstp, struct svc_fh *fhp,
        if (IS_ERR(dnew))
                goto out_nfserr;
-        mode = S_IALLUGO;
-        /* Only the MODE ATTRibute is even vaguely meaningful */
-        if (iap && (iap->ia_valid & ATTR_MODE))
-                mode = iap->ia_mode & S_IALLUGO;
        host_err = mnt_want_write(fhp->fh_export->ex_path.mnt);
        if (host_err)
                goto out_nfserr;
@@ -1551,11 +1545,11 @@ nfsd_symlink(struct svc_rqst *rqstp, struct svc_fh *fhp,
                else {
                        strncpy(path_alloced, path, plen);
                        path_alloced[plen] = 0;
-                        host_err = vfs_symlink(dentry->d_inode, dnew, path_alloced, mode);
+                        host_err = vfs_symlink(dentry->d_inode, dnew, path_alloced);
                        kfree(path_alloced);
                }
        } else
-                host_err = vfs_symlink(dentry->d_inode, dnew, path, mode);
+                host_err = vfs_symlink(dentry->d_inode, dnew, path);
        if (!host_err) {
                if (EX_ISSYNC(fhp->fh_export))
@@ -1959,12 +1953,12 @@ nfsd_permission(struct svc_rqst *rqstp, struct svc_export *exp,
                return 0;
        /* This assumes  NFSD_MAY_{READ,WRITE,EXEC} == MAY_{READ,WRITE,EXEC} */
-        err = permission(inode, acc & (MAY_READ|MAY_WRITE|MAY_EXEC), NULL);
+        err = inode_permission(inode, acc & (MAY_READ|MAY_WRITE|MAY_EXEC));
        /* Allow read access to binaries even when mode 111 */
        if (err == -EACCES && S_ISREG(inode->i_mode) &&
            acc == (NFSD_MAY_READ | NFSD_MAY_OWNER_OVERRIDE))
-                err = permission(inode, MAY_EXEC, NULL);
+                err = inode_permission(inode, MAY_EXEC);
        return err? nfserrno(err) : 0;
 }
diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
index 3c5550cd11d6..d020866d4232 100644
--- a/fs/ntfs/file.c
+++ b/fs/ntfs/file.c
@@ -2118,7 +2118,7 @@ static ssize_t ntfs_file_aio_write_nolock(struct kiocb *iocb,
                goto out;
        if (!count)
                goto out;
-        err = remove_suid(file->f_path.dentry);
+        err = file_remove_suid(file);
        if (err)
                goto out;
        file_update_time(file);
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index e8514e8b6ce8..be2dd95d3a1d 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1176,7 +1176,7 @@ bail:
        return err;
 }
-int ocfs2_permission(struct inode *inode, int mask, struct nameidata *nd)
+int ocfs2_permission(struct inode *inode, int mask)
 {
        int ret;
diff --git a/fs/ocfs2/file.h b/fs/ocfs2/file.h
index 048ddcaf5c80..1e27b4d017ea 100644
--- a/fs/ocfs2/file.h
+++ b/fs/ocfs2/file.h
@@ -62,8 +62,7 @@ int ocfs2_lock_allocators(struct inode *inode, struct ocfs2_dinode *di,
 int ocfs2_setattr(struct dentry *dentry, struct iattr *attr);
 int ocfs2_getattr(struct vfsmount *mnt, struct dentry *dentry,
                  struct kstat *stat);
-int ocfs2_permission(struct inode *inode, int mask,
+int ocfs2_permission(struct inode *inode, int mask);
-                     struct nameidata *nd);
 int ocfs2_should_update_atime(struct inode *inode,
                              struct vfsmount *vfsmnt);
diff --git a/fs/open.c b/fs/open.c
index bb98d2fe809f..52647be277a2 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -122,37 +122,37 @@ static int vfs_statfs64(struct dentry *dentry, struct statfs64 *buf)
        return 0;
 }
-asmlinkage long sys_statfs(const char __user * path, struct statfs __user * buf)
+asmlinkage long sys_statfs(const char __user *pathname, struct statfs __user * buf)
 {
-        struct nameidata nd;
+        struct path path;
        int error;
-        error = user_path_walk(path, &nd);
+        error = user_path(pathname, &path);
        if (!error) {
                struct statfs tmp;
-                error = vfs_statfs_native(nd.path.dentry, &tmp);
+                error = vfs_statfs_native(path.dentry, &tmp);
                if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
                        error = -EFAULT;
-                path_put(&nd.path);
+                path_put(&path);
        }
        return error;
 }
-asmlinkage long sys_statfs64(const char __user *path, size_t sz, struct statfs64 __user *buf)
+asmlinkage long sys_statfs64(const char __user *pathname, size_t sz, struct statfs64 __user *buf)
 {
-        struct nameidata nd;
+        struct path path;
        long error;
        if (sz != sizeof(*buf))
                return -EINVAL;
-        error = user_path_walk(path, &nd);
+        error = user_path(pathname, &path);
        if (!error) {
                struct statfs64 tmp;
-                error = vfs_statfs64(nd.path.dentry, &tmp);
+                error = vfs_statfs64(path.dentry, &tmp);
                if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
                        error = -EFAULT;
-                path_put(&nd.path);
+                path_put(&path);
        }
        return error;
 }
@@ -223,20 +223,20 @@ int do_truncate(struct dentry *dentry, loff_t length, unsigned int time_attrs,
        return err;
 }
-static long do_sys_truncate(const char __user * path, loff_t length)
+static long do_sys_truncate(const char __user *pathname, loff_t length)
 {
-        struct nameidata nd;
+        struct path path;
-        struct inode * inode;
+        struct inode *inode;
        int error;
        error = -EINVAL;
        if (length < 0) /* sorry, but loff_t says... */
                goto out;
-        error = user_path_walk(path, &nd);
+        error = user_path(pathname, &path);
        if (error)
                goto out;
-        inode = nd.path.dentry->d_inode;
+        inode = path.dentry->d_inode;
        /* For directories it's -EISDIR, for other non-regulars - -EINVAL */
        error = -EISDIR;
@@ -247,16 +247,16 @@ static long do_sys_truncate(const char __user * path, loff_t length)
        if (!S_ISREG(inode->i_mode))
                goto dput_and_out;
-        error = mnt_want_write(nd.path.mnt);
+        error = mnt_want_write(path.mnt);
        if (error)
                goto dput_and_out;
-        error = vfs_permission(&nd, MAY_WRITE);
+        error = inode_permission(inode, MAY_WRITE);
        if (error)
                goto mnt_drop_write_and_out;
        error = -EPERM;
-        if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
+        if (IS_APPEND(inode))
                goto mnt_drop_write_and_out;
        error = get_write_access(inode);
@@ -274,15 +274,15 @@ static long do_sys_truncate(const char __user * path, loff_t length)
        error = locks_verify_truncate(inode, NULL, length);
        if (!error) {
                DQUOT_INIT(inode);
-                error = do_truncate(nd.path.dentry, length, 0, NULL);
+                error = do_truncate(path.dentry, length, 0, NULL);
        }
 put_write_and_out:
        put_write_access(inode);
 mnt_drop_write_and_out:
-        mnt_drop_write(nd.path.mnt);
+        mnt_drop_write(path.mnt);
 dput_and_out:
-        path_put(&nd.path);
+        path_put(&path);
 out:
        return error;
 }
@@ -425,7 +425,8 @@ out:
 */
 asmlinkage long sys_faccessat(int dfd, const char __user *filename, int mode)
 {
-        struct nameidata nd;
+        struct path path;
+        struct inode *inode;
        int old_fsuid, old_fsgid;
        kernel_cap_t uninitialized_var(old_cap);  /* !SECURE_NO_SETUID_FIXUP */
        int res;
@@ -448,7 +449,7 @@ asmlinkage long sys_faccessat(int dfd, const char __user *filename, int mode)
                 * FIXME: There is a race here against sys_capset.  The
                 * capabilities can change yet we will restore the old
                 * value below.  We should hold task_capabilities_lock,
-                 * but we cannot because user_path_walk can sleep.
+                 * but we cannot because user_path_at can sleep.
                 */
 #endif /* ndef CONFIG_SECURITY_FILE_CAPABILITIES */
                if (current->uid)
@@ -457,14 +458,25 @@ asmlinkage long sys_faccessat(int dfd, const char __user *filename, int mode)
                        old_cap = cap_set_effective(current->cap_permitted);
        }
-        res = __user_walk_fd(dfd, filename, LOOKUP_FOLLOW|LOOKUP_ACCESS, &nd);
+        res = user_path_at(dfd, filename, LOOKUP_FOLLOW, &path);
        if (res)
                goto out;
-        res = vfs_permission(&nd, mode);
+        inode = path.dentry->d_inode;
+        if ((mode & MAY_EXEC) && S_ISREG(inode->i_mode)) {
+                /*
+                 * MAY_EXEC on regular files is denied if the fs is mounted
+                 * with the "noexec" flag.
+                 */
+                res = -EACCES;
+                if (path.mnt->mnt_flags & MNT_NOEXEC)
+                        goto out_path_release;
+        }
+        res = inode_permission(inode, mode | MAY_ACCESS);
        /* SuS v2 requires we report a read only fs too */
-        if(res || !(mode & S_IWOTH) ||
+        if (res || !(mode & S_IWOTH) || special_file(inode->i_mode))
-           special_file(nd.path.dentry->d_inode->i_mode))
                goto out_path_release;
        /*
         * This is a rare case where using __mnt_is_readonly()
@@ -476,11 +488,11 @@ asmlinkage long sys_faccessat(int dfd, const char __user *filename, int mode)
         * inherently racy and know that the fs may change
         * state before we even see this result.
         */
-        if (__mnt_is_readonly(nd.path.mnt))
+        if (__mnt_is_readonly(path.mnt))
                res = -EROFS;
 out_path_release:
-        path_put(&nd.path);
+        path_put(&path);
 out:
        current->fsuid = old_fsuid;
        current->fsgid = old_fsgid;
@@ -498,22 +510,21 @@ asmlinkage long sys_access(const char __user *filename, int mode)
 asmlinkage long sys_chdir(const char __user * filename)
 {
-        struct nameidata nd;
+        struct path path;
        int error;
-        error = __user_walk(filename,
+        error = user_path_dir(filename, &path);
-                            LOOKUP_FOLLOW|LOOKUP_DIRECTORY|LOOKUP_CHDIR, &nd);
        if (error)
                goto out;
-        error = vfs_permission(&nd, MAY_EXEC);
+        error = inode_permission(path.dentry->d_inode, MAY_EXEC | MAY_ACCESS);
        if (error)
                goto dput_and_out;
-        set_fs_pwd(current->fs, &nd.path);
+        set_fs_pwd(current->fs, &path);
 dput_and_out:
-        path_put(&nd.path);
+        path_put(&path);
 out:
        return error;
 }
@@ -535,7 +546,7 @@ asmlinkage long sys_fchdir(unsigned int fd)
        if (!S_ISDIR(inode->i_mode))
                goto out_putf;
-        error = file_permission(file, MAY_EXEC);
+        error = inode_permission(inode, MAY_EXEC | MAY_ACCESS);
        if (!error)
                set_fs_pwd(current->fs, &file->f_path);
 out_putf:
@@ -546,14 +557,14 @@ out:
 asmlinkage long sys_chroot(const char __user * filename)
 {
-        struct nameidata nd;
+        struct path path;
        int error;
-        error = __user_walk(filename, LOOKUP_FOLLOW | LOOKUP_DIRECTORY | LOOKUP_NOALT, &nd);
+        error = user_path_dir(filename, &path);
        if (error)
                goto out;
-        error = vfs_permission(&nd, MAY_EXEC);
+        error = inode_permission(path.dentry->d_inode, MAY_EXEC | MAY_ACCESS);
        if (error)
                goto dput_and_out;
@@ -561,11 +572,10 @@ asmlinkage long sys_chroot(const char __user * filename)
        if (!capable(CAP_SYS_CHROOT))
                goto dput_and_out;
-        set_fs_root(current->fs, &nd.path);
+        set_fs_root(current->fs, &path);
-        set_fs_altroot();
        error = 0;
 dput_and_out:
-        path_put(&nd.path);
+        path_put(&path);
 out:
        return error;
 }
@@ -590,9 +600,6 @@ asmlinkage long sys_fchmod(unsigned int fd, mode_t mode)
        err = mnt_want_write(file->f_path.mnt);
        if (err)
                goto out_putf;
-        err = -EPERM;
-        if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
-                goto out_drop_write;
        mutex_lock(&inode->i_mutex);
        if (mode == (mode_t) -1)
                mode = inode->i_mode;
@@ -600,8 +607,6 @@ asmlinkage long sys_fchmod(unsigned int fd, mode_t mode)
        newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
        err = notify_change(dentry, &newattrs);
        mutex_unlock(&inode->i_mutex);
-out_drop_write:
        mnt_drop_write(file->f_path.mnt);
 out_putf:
        fput(file);
@@ -612,36 +617,29 @@ out:
 asmlinkage long sys_fchmodat(int dfd, const char __user *filename,
                             mode_t mode)
 {
-        struct nameidata nd;
+        struct path path;
-        struct inode * inode;
+        struct inode *inode;
        int error;
        struct iattr newattrs;
-        error = __user_walk_fd(dfd, filename, LOOKUP_FOLLOW, &nd);
+        error = user_path_at(dfd, filename, LOOKUP_FOLLOW, &path);
        if (error)
                goto out;
-        inode = nd.path.dentry->d_inode;
+        inode = path.dentry->d_inode;
-        error = mnt_want_write(nd.path.mnt);
+        error = mnt_want_write(path.mnt);
        if (error)
                goto dput_and_out;
-        error = -EPERM;
-        if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
-                goto out_drop_write;
        mutex_lock(&inode->i_mutex);
        if (mode == (mode_t) -1)
                mode = inode->i_mode;
        newattrs.ia_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
        newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
-        error = notify_change(nd.path.dentry, &newattrs);
+        error = notify_change(path.dentry, &newattrs);
        mutex_unlock(&inode->i_mutex);
+        mnt_drop_write(path.mnt);
-out_drop_write:
-        mnt_drop_write(nd.path.mnt);
 dput_and_out:
-        path_put(&nd.path);
+        path_put(&path);
 out:
        return error;
 }
@@ -653,18 +651,10 @@ asmlinkage long sys_chmod(const char __user *filename, mode_t mode)
 static int chown_common(struct dentry * dentry, uid_t user, gid_t group)
 {
-        struct inode * inode;
+        struct inode *inode = dentry->d_inode;
        int error;
        struct iattr newattrs;
-        error = -ENOENT;
-        if (!(inode = dentry->d_inode)) {
-                printk(KERN_ERR "chown_common: NULL inode\n");
-                goto out;
-        }
-        error = -EPERM;
-        if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
-                goto out;
        newattrs.ia_valid =  ATTR_CTIME;
        if (user != (uid_t) -1) {
                newattrs.ia_valid |= ATTR_UID;
@@ -680,25 +670,25 @@ static int chown_common(struct dentry * dentry, uid_t user, gid_t group)
        mutex_lock(&inode->i_mutex);
        error = notify_change(dentry, &newattrs);
        mutex_unlock(&inode->i_mutex);
-out:
        return error;
 }
 asmlinkage long sys_chown(const char __user * filename, uid_t user, gid_t group)
 {
-        struct nameidata nd;
+        struct path path;
        int error;
-        error = user_path_walk(filename, &nd);
+        error = user_path(filename, &path);
        if (error)
                goto out;
-        error = mnt_want_write(nd.path.mnt);
+        error = mnt_want_write(path.mnt);
        if (error)
                goto out_release;
-        error = chown_common(nd.path.dentry, user, group);
+        error = chown_common(path.dentry, user, group);
-        mnt_drop_write(nd.path.mnt);
+        mnt_drop_write(path.mnt);
 out_release:
-        path_put(&nd.path);
+        path_put(&path);
 out:
        return error;
 }
@@ -706,7 +696,7 @@ out:
 asmlinkage long sys_fchownat(int dfd, const char __user *filename, uid_t user,
                             gid_t group, int flag)
 {
-        struct nameidata nd;
+        struct path path;
        int error = -EINVAL;
        int follow;
@@ -714,35 +704,35 @@ asmlinkage long sys_fchownat(int dfd, const char __user *filename, uid_t user,
                goto out;
        follow = (flag & AT_SYMLINK_NOFOLLOW) ? 0 : LOOKUP_FOLLOW;
-        error = __user_walk_fd(dfd, filename, follow, &nd);
+        error = user_path_at(dfd, filename, follow, &path);
        if (error)
                goto out;
-        error = mnt_want_write(nd.path.mnt);
+        error = mnt_want_write(path.mnt);
        if (error)
                goto out_release;
-        error = chown_common(nd.path.dentry, user, group);
+        error = chown_common(path.dentry, user, group);
-        mnt_drop_write(nd.path.mnt);
+        mnt_drop_write(path.mnt);
 out_release:
-        path_put(&nd.path);
+        path_put(&path);
 out:
        return error;
 }
 asmlinkage long sys_lchown(const char __user * filename, uid_t user, gid_t group)
 {
-        struct nameidata nd;
+        struct path path;
        int error;
-        error = user_path_walk_link(filename, &nd);
+        error = user_lpath(filename, &path);
        if (error)
                goto out;
-        error = mnt_want_write(nd.path.mnt);
+        error = mnt_want_write(path.mnt);
        if (error)
                goto out_release;
-        error = chown_common(nd.path.dentry, user, group);
+        error = chown_common(path.dentry, user, group);
-        mnt_drop_write(nd.path.mnt);
+        mnt_drop_write(path.mnt);
 out_release:
-        path_put(&nd.path);
+        path_put(&path);
 out:
        return error;
 }
@@ -982,7 +972,6 @@ int get_unused_fd_flags(int flags)
        int fd, error;
        struct fdtable *fdt;
-        error = -EMFILE;
        spin_lock(&files->file_lock);
 repeat:
@@ -990,13 +979,6 @@ repeat:
        fd = find_next_zero_bit(fdt->open_fds->fds_bits, fdt->max_fds,
                                files->next_fd);
-        /*
-         * N.B. For clone tasks sharing a files structure, this test
-         * will limit the total number of files that can be opened.
-         */
-        if (fd >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
-                goto out;
        /* Do we need to expand the fd array or fd set?  */
        error = expand_files(files, fd);
        if (error < 0)
@@ -1007,7 +989,6 @@ repeat:
                 * If we needed to expand the fs array we
                 * might have blocked - try again.
                 */
-                error = -EMFILE;
                goto repeat;
        }
diff --git a/fs/pipe.c b/fs/pipe.c
index 10c4e9aa5c49..fcba6542b8d0 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -777,45 +777,10 @@ pipe_rdwr_open(struct inode *inode, struct file *filp)
 /*
 * The file_operations structs are not static because they
 * are also used in linux/fs/fifo.c to do operations on FIFOs.
+ *
+ * Pipes reuse fifos' file_operations structs.
 */
-const struct file_operations read_fifo_fops = {
+const struct file_operations read_pipefifo_fops = {
-        .llseek         = no_llseek,
-        .read           = do_sync_read,
-        .aio_read       = pipe_read,
-        .write          = bad_pipe_w,
-        .poll           = pipe_poll,
-        .unlocked_ioctl = pipe_ioctl,
-        .open           = pipe_read_open,
-        .release        = pipe_read_release,
-        .fasync         = pipe_read_fasync,
-};
-const struct file_operations write_fifo_fops = {
-        .llseek         = no_llseek,
-        .read           = bad_pipe_r,
-        .write          = do_sync_write,
-        .aio_write      = pipe_write,
-        .poll           = pipe_poll,
-        .unlocked_ioctl = pipe_ioctl,
-        .open           = pipe_write_open,
-        .release        = pipe_write_release,
-        .fasync         = pipe_write_fasync,
-};
-const struct file_operations rdwr_fifo_fops = {
-        .llseek         = no_llseek,
-        .read           = do_sync_read,
-        .aio_read       = pipe_read,
-        .write          = do_sync_write,
-        .aio_write      = pipe_write,
-        .poll           = pipe_poll,
-        .unlocked_ioctl = pipe_ioctl,
-        .open           = pipe_rdwr_open,
-        .release        = pipe_rdwr_release,
-        .fasync         = pipe_rdwr_fasync,
-};
-static const struct file_operations read_pipe_fops = {
        .llseek         = no_llseek,
        .read           = do_sync_read,
        .aio_read       = pipe_read,
@@ -827,7 +792,7 @@ static const struct file_operations read_pipe_fops = {
        .fasync         = pipe_read_fasync,
 };
-static const struct file_operations write_pipe_fops = {
+const struct file_operations write_pipefifo_fops = {
        .llseek         = no_llseek,
        .read           = bad_pipe_r,
        .write          = do_sync_write,
@@ -839,7 +804,7 @@ static const struct file_operations write_pipe_fops = {
        .fasync         = pipe_write_fasync,
 };
-static const struct file_operations rdwr_pipe_fops = {
+const struct file_operations rdwr_pipefifo_fops = {
        .llseek         = no_llseek,
        .read           = do_sync_read,
        .aio_read       = pipe_read,
@@ -927,7 +892,7 @@ static struct inode * get_pipe_inode(void)
        inode->i_pipe = pipe;
        pipe->readers = pipe->writers = 1;
-        inode->i_fop = &rdwr_pipe_fops;
+        inode->i_fop = &rdwr_pipefifo_fops;
        /*
         * Mark the inode dirty from the very beginning,
@@ -978,7 +943,7 @@ struct file *create_write_pipe(int flags)
        d_instantiate(dentry, inode);
        err = -ENFILE;
-        f = alloc_file(pipe_mnt, dentry, FMODE_WRITE, &write_pipe_fops);
+        f = alloc_file(pipe_mnt, dentry, FMODE_WRITE, &write_pipefifo_fops);
        if (!f)
                goto err_dentry;
        f->f_mapping = inode->i_mapping;
@@ -1020,7 +985,7 @@ struct file *create_read_pipe(struct file *wrf, int flags)
        f->f_pos = 0;
        f->f_flags = O_RDONLY | (flags & O_NONBLOCK);
-        f->f_op = &read_pipe_fops;
+        f->f_op = &read_pipefifo_fops;
        f->f_mode = FMODE_READ;
        f->f_version = 0;
diff --git a/fs/proc/base.c b/fs/proc/base.c
index d744aa3c9f74..e74308bdabd3 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1859,8 +1859,7 @@ static const struct file_operations proc_fd_operations = {
 * /proc/pid/fd needs a special permission handler so that a process can still
 * access /proc/self/fd after it has executed a setuid().
 */
-static int proc_fd_permission(struct inode *inode, int mask,
+static int proc_fd_permission(struct inode *inode, int mask)
-                                struct nameidata *nd)
 {
        int rv;
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index b37f25dc45a5..8bb03f056c28 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -17,6 +17,7 @@
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/smp_lock.h>
+#include <linux/sysctl.h>
 #include <asm/system.h>
 #include <asm/uaccess.h>
@@ -65,6 +66,8 @@ static void proc_delete_inode(struct inode *inode)
                        module_put(de->owner);
                de_put(de);
        }
+        if (PROC_I(inode)->sysctl)
+                sysctl_head_put(PROC_I(inode)->sysctl);
        clear_inode(inode);
 }
@@ -84,6 +87,8 @@ static struct inode *proc_alloc_inode(struct super_block *sb)
        ei->fd = 0;
        ei->op.proc_get_link = NULL;
        ei->pde = NULL;
+        ei->sysctl = NULL;
+        ei->sysctl_entry = NULL;
        inode = &ei->vfs_inode;
        inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
        return inode;
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 5acc001d49f6..f9a8b892718f 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -10,149 +10,110 @@
 static struct dentry_operations proc_sys_dentry_operations;
 static const struct file_operations proc_sys_file_operations;
 static const struct inode_operations proc_sys_inode_operations;
+static const struct file_operations proc_sys_dir_file_operations;
+static const struct inode_operations proc_sys_dir_operations;
-static void proc_sys_refresh_inode(struct inode *inode, struct ctl_table *table)
+static struct inode *proc_sys_make_inode(struct super_block *sb,
-{
+                struct ctl_table_header *head, struct ctl_table *table)
-        /* Refresh the cached information bits in the inode */
-        if (table) {
-                inode->i_uid = 0;
-                inode->i_gid = 0;
-                inode->i_mode = table->mode;
-                if (table->proc_handler) {
-                        inode->i_mode |= S_IFREG;
-                        inode->i_nlink = 1;
-                } else {
-                        inode->i_mode |= S_IFDIR;
-                        inode->i_nlink = 0;     /* It is too hard to figure out */
-                }
-        }
-}
-static struct inode *proc_sys_make_inode(struct inode *dir, struct ctl_table *table)
 {
        struct inode *inode;
-        struct proc_inode *dir_ei, *ei;
+        struct proc_inode *ei;
-        int depth;
-        inode = new_inode(dir->i_sb);
+        inode = new_inode(sb);
        if (!inode)
                goto out;
-        /* A directory is always one deeper than it's parent */
+        sysctl_head_get(head);
-        dir_ei = PROC_I(dir);
-        depth = dir_ei->fd + 1;
        ei = PROC_I(inode);
-        ei->fd = depth;
+        ei->sysctl = head;
+        ei->sysctl_entry = table;
        inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
-        inode->i_op = &proc_sys_inode_operations;
-        inode->i_fop = &proc_sys_file_operations;
        inode->i_flags |= S_PRIVATE; /* tell selinux to ignore this inode */
-        proc_sys_refresh_inode(inode, table);
+        inode->i_mode = table->mode;
+        if (!table->child) {
+                inode->i_mode |= S_IFREG;
+                inode->i_op = &proc_sys_inode_operations;
+                inode->i_fop = &proc_sys_file_operations;
+        } else {
+                inode->i_mode |= S_IFDIR;
+                inode->i_nlink = 0;
+                inode->i_op = &proc_sys_dir_operations;
+                inode->i_fop = &proc_sys_dir_file_operations;
+        }
 out:
        return inode;
 }
-static struct dentry *proc_sys_ancestor(struct dentry *dentry, int depth)
+static struct ctl_table *find_in_table(struct ctl_table *p, struct qstr *name)
-{
-        for (;;) {
-                struct proc_inode *ei;
-                ei = PROC_I(dentry->d_inode);
-                if (ei->fd == depth)
-                        break; /* found */
-                dentry = dentry->d_parent;
-        }
-        return dentry;
-}
-static struct ctl_table *proc_sys_lookup_table_one(struct ctl_table *table,
-                                                        struct qstr *name)
 {
        int len;
-        for ( ; table->ctl_name || table->procname; table++) {
+        for ( ; p->ctl_name || p->procname; p++) {
-                if (!table->procname)
+                if (!p->procname)
                        continue;
-                len = strlen(table->procname);
+                len = strlen(p->procname);
                if (len != name->len)
                        continue;
-                if (memcmp(table->procname, name->name, len) != 0)
+                if (memcmp(p->procname, name->name, len) != 0)
                        continue;
                /* I have a match */
-                return table;
+                return p;
        }
        return NULL;
 }
-static struct ctl_table *proc_sys_lookup_table(struct dentry *dentry,
+struct ctl_table_header *grab_header(struct inode *inode)
-                                                struct ctl_table *table)
 {
-        struct dentry *ancestor;
+        if (PROC_I(inode)->sysctl)
-        struct proc_inode *ei;
+                return sysctl_head_grab(PROC_I(inode)->sysctl);
-        int depth, i;
+        else
+                return sysctl_head_next(NULL);
+}
-        ei = PROC_I(dentry->d_inode);
+static struct dentry *proc_sys_lookup(struct inode *dir, struct dentry *dentry,
-        depth = ei->fd;
+                                        struct nameidata *nd)
+{
+        struct ctl_table_header *head = grab_header(dir);
+        struct ctl_table *table = PROC_I(dir)->sysctl_entry;
+        struct ctl_table_header *h = NULL;
+        struct qstr *name = &dentry->d_name;
+        struct ctl_table *p;
+        struct inode *inode;
+        struct dentry *err = ERR_PTR(-ENOENT);
-        if (depth == 0)
+        if (IS_ERR(head))
-                return table;
+                return ERR_CAST(head);
-        for (i = 1; table && (i <= depth); i++) {
+        if (table && !table->child) {
-                ancestor = proc_sys_ancestor(dentry, i);
+                WARN_ON(1);
-                table = proc_sys_lookup_table_one(table, &ancestor->d_name);
+                goto out;
-                if (table)
-                        table = table->child;
        }
-        return table;
-}
-static struct ctl_table *proc_sys_lookup_entry(struct dentry *dparent,
-                                                struct qstr *name,
-                                                struct ctl_table *table)
-{
-        table = proc_sys_lookup_table(dparent, table);
-        if (table)
-                table = proc_sys_lookup_table_one(table, name);
-        return table;
-}
-static struct ctl_table *do_proc_sys_lookup(struct dentry *parent,
+        table = table ? table->child : head->ctl_table;
-                                                struct qstr *name,
-                                                struct ctl_table_header **ptr)
-{
-        struct ctl_table_header *head;
-        struct ctl_table *table = NULL;
-        for (head = sysctl_head_next(NULL); head;
+        p = find_in_table(table, name);
-                        head = sysctl_head_next(head)) {
+        if (!p) {
-                table = proc_sys_lookup_entry(parent, name, head->ctl_table);
+                for (h = sysctl_head_next(NULL); h; h = sysctl_head_next(h)) {
-                if (table)
+                        if (h->attached_to != table)
-                        break;
+                                continue;
+                        p = find_in_table(h->attached_by, name);
+                        if (p)
+                                break;
+                }
        }
-        *ptr = head;
-        return table;
-}
-static struct dentry *proc_sys_lookup(struct inode *dir, struct dentry *dentry,
-                                        struct nameidata *nd)
-{
-        struct ctl_table_header *head;
-        struct inode *inode;
-        struct dentry *err;
-        struct ctl_table *table;
-        err = ERR_PTR(-ENOENT);
+        if (!p)
-        table = do_proc_sys_lookup(dentry->d_parent, &dentry->d_name, &head);
-        if (!table)
                goto out;
        err = ERR_PTR(-ENOMEM);
-        inode = proc_sys_make_inode(dir, table);
+        inode = proc_sys_make_inode(dir->i_sb, h ? h : head, p);
+        if (h)
+                sysctl_head_finish(h);
        if (!inode)
                goto out;
@@ -168,22 +129,14 @@ out:
 static ssize_t proc_sys_call_handler(struct file *filp, void __user *buf,
                size_t count, loff_t *ppos, int write)
 {
-        struct dentry *dentry = filp->f_dentry;
+        struct inode *inode = filp->f_path.dentry->d_inode;
-        struct ctl_table_header *head;
+        struct ctl_table_header *head = grab_header(inode);
-        struct ctl_table *table;
+        struct ctl_table *table = PROC_I(inode)->sysctl_entry;
        ssize_t error;
        size_t res;
-        table = do_proc_sys_lookup(dentry->d_parent, &dentry->d_name, &head);
+        if (IS_ERR(head))
-        /* Has the sysctl entry disappeared on us? */
+                return PTR_ERR(head);
-        error = -ENOENT;
-        if (!table)
-                goto out;
-        /* Has the sysctl entry been replaced by a directory? */
-        error = -EISDIR;
-        if (!table->proc_handler)
-                goto out;
        /*
         * At this point we know that the sysctl was not unregistered
@@ -193,6 +146,11 @@ static ssize_t proc_sys_call_handler(struct file *filp, void __user *buf,
        if (sysctl_perm(head->root, table, write ? MAY_WRITE : MAY_READ))
                goto out;
+        /* if that can happen at all, it should be -EINVAL, not -EISDIR */
+        error = -EINVAL;
+        if (!table->proc_handler)
+                goto out;
        /* careful: calling conventions are nasty here */
        res = count;
        error = table->proc_handler(table, write, filp, buf, &res, ppos);
@@ -218,82 +176,86 @@ static ssize_t proc_sys_write(struct file *filp, const char __user *buf,
 static int proc_sys_fill_cache(struct file *filp, void *dirent,
-                                filldir_t filldir, struct ctl_table *table)
+                                filldir_t filldir,
+                                struct ctl_table_header *head,
+                                struct ctl_table *table)
 {
-        struct ctl_table_header *head;
-        struct ctl_table *child_table = NULL;
        struct dentry *child, *dir = filp->f_path.dentry;
        struct inode *inode;
        struct qstr qname;
        ino_t ino = 0;
        unsigned type = DT_UNKNOWN;
-        int ret;
        qname.name = table->procname;
        qname.len  = strlen(table->procname);
        qname.hash = full_name_hash(qname.name, qname.len);
-        /* Suppress duplicates.
-         * Only fill a directory entry if it is the value that
-         * an ordinary lookup of that name returns.  Hide all
-         * others.
-         *
-         * If we ever cache this translation in the dcache
-         * I should do a dcache lookup first.  But for now
-         * it is just simpler not to.
-         */
-        ret = 0;
-        child_table = do_proc_sys_lookup(dir, &qname, &head);
-        sysctl_head_finish(head);
-        if (child_table != table)
-                return 0;
        child = d_lookup(dir, &qname);
        if (!child) {
-                struct dentry *new;
+                child = d_alloc(dir, &qname);
-                new = d_alloc(dir, &qname);
+                if (child) {
-                if (new) {
+                        inode = proc_sys_make_inode(dir->d_sb, head, table);
-                        inode = proc_sys_make_inode(dir->d_inode, table);
+                        if (!inode) {
-                        if (!inode)
+                                dput(child);
-                                child = ERR_PTR(-ENOMEM);
+                                return -ENOMEM;
-                        else {
+                        } else {
-                                new->d_op = &proc_sys_dentry_operations;
+                                child->d_op = &proc_sys_dentry_operations;
-                                d_add(new, inode);
+                                d_add(child, inode);
                        }
-                        if (child)
+                } else {
-                                dput(new);
+                        return -ENOMEM;
-                        else
-                                child = new;
                }
        }
-        if (!child || IS_ERR(child) || !child->d_inode)
-                goto end_instantiate;
        inode = child->d_inode;
-        if (inode) {
+        ino  = inode->i_ino;
-                ino  = inode->i_ino;
+        type = inode->i_mode >> 12;
-                type = inode->i_mode >> 12;
-        }
        dput(child);
-end_instantiate:
+        return !!filldir(dirent, qname.name, qname.len, filp->f_pos, ino, type);
-        if (!ino)
+}
-                ino= find_inode_number(dir, &qname);
-        if (!ino)
+static int scan(struct ctl_table_header *head, ctl_table *table,
-                ino = 1;
+                unsigned long *pos, struct file *file,
-        return filldir(dirent, qname.name, qname.len, filp->f_pos, ino, type);
+                void *dirent, filldir_t filldir)
+{
+        for (; table->ctl_name || table->procname; table++, (*pos)++) {
+                int res;
+                /* Can't do anything without a proc name */
+                if (!table->procname)
+                        continue;
+                if (*pos < file->f_pos)
+                        continue;
+                res = proc_sys_fill_cache(file, dirent, filldir, head, table);
+                if (res)
+                        return res;
+                file->f_pos = *pos + 1;
+        }
+        return 0;
 }
 static int proc_sys_readdir(struct file *filp, void *dirent, filldir_t filldir)
 {
-        struct dentry *dentry = filp->f_dentry;
+        struct dentry *dentry = filp->f_path.dentry;
        struct inode *inode = dentry->d_inode;
-        struct ctl_table_header *head = NULL;
+        struct ctl_table_header *head = grab_header(inode);
-        struct ctl_table *table;
+        struct ctl_table *table = PROC_I(inode)->sysctl_entry;
+        struct ctl_table_header *h = NULL;
        unsigned long pos;
-        int ret;
+        int ret = -EINVAL;
+        if (IS_ERR(head))
+                return PTR_ERR(head);
-        ret = -ENOTDIR;
+        if (table && !table->child) {
-        if (!S_ISDIR(inode->i_mode))
+                WARN_ON(1);
                goto out;
+        }
+        table = table ? table->child : head->ctl_table;
        ret = 0;
        /* Avoid a switch here: arm builds fail with missing __cmpdi2 */
@@ -311,30 +273,17 @@ static int proc_sys_readdir(struct file *filp, void *dirent, filldir_t filldir)
        }
        pos = 2;
-        /* - Find each instance of the directory
+        ret = scan(head, table, &pos, filp, dirent, filldir);
-         * - Read all entries in each instance
+        if (ret)
-         * - Before returning an entry to user space lookup the entry
+                goto out;
-         *   by name and if I find a different entry don't return
-         *   this one because it means it is a buried dup.
-         * For sysctl this should only happen for directory entries.
-         */
-        for (head = sysctl_head_next(NULL); head; head = sysctl_head_next(head)) {
-                table = proc_sys_lookup_table(dentry, head->ctl_table);
-                if (!table)
+        for (h = sysctl_head_next(NULL); h; h = sysctl_head_next(h)) {
+                if (h->attached_to != table)
                        continue;
+                ret = scan(h, h->attached_by, &pos, filp, dirent, filldir);
-                for (; table->ctl_name || table->procname; table++, pos++) {
+                if (ret) {
-                        /* Can't do anything without a proc name */
+                        sysctl_head_finish(h);
-                        if (!table->procname)
+                        break;
-                                continue;
-                        if (pos < filp->f_pos)
-                                continue;
-                        if (proc_sys_fill_cache(filp, dirent, filldir, table) < 0)
-                                goto out;
-                        filp->f_pos = pos + 1;
                }
        }
        ret = 1;
@@ -343,53 +292,24 @@ out:
        return ret;
 }
-static int proc_sys_permission(struct inode *inode, int mask, struct nameidata *nd)
+static int proc_sys_permission(struct inode *inode, int mask)
 {
        /*
         * sysctl entries that are not writeable,
         * are _NOT_ writeable, capabilities or not.
         */
-        struct ctl_table_header *head;
+        struct ctl_table_header *head = grab_header(inode);
-        struct ctl_table *table;
+        struct ctl_table *table = PROC_I(inode)->sysctl_entry;
-        struct dentry *dentry;
-        int mode;
-        int depth;
        int error;
-        head = NULL;
+        if (IS_ERR(head))
-        depth = PROC_I(inode)->fd;
+                return PTR_ERR(head);
-        /* First check the cached permissions, in case we don't have
-         * enough information to lookup the sysctl table entry.
-         */
-        error = -EACCES;
-        mode = inode->i_mode;
-        if (current->euid == 0)
-                mode >>= 6;
-        else if (in_group_p(0))
-                mode >>= 3;
-        if ((mode & mask & (MAY_READ|MAY_WRITE|MAY_EXEC)) == mask)
-                error = 0;
-        /* If we can't get a sysctl table entry the permission
-         * checks on the cached mode will have to be enough.
-         */
-        if (!nd || !depth)
-                goto out;
-        dentry = nd->path.dentry;
+        if (!table) /* global root - r-xr-xr-x */
-        table = do_proc_sys_lookup(dentry->d_parent, &dentry->d_name, &head);
+                error = mask & MAY_WRITE ? -EACCES : 0;
+        else /* Use the permissions on the sysctl table entry */
+                error = sysctl_perm(head->root, table, mask);
-        /* If the entry does not exist deny permission */
-        error = -EACCES;
-        if (!table)
-                goto out;
-        /* Use the permissions on the sysctl table entry */
-        error = sysctl_perm(head->root, table, mask);
-out:
        sysctl_head_finish(head);
        return error;
 }
@@ -409,33 +329,70 @@ static int proc_sys_setattr(struct dentry *dentry, struct iattr *attr)
        return error;
 }
-/* I'm lazy and don't distinguish between files and directories,
+static int proc_sys_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
- * until access time.
+{
- */
+        struct inode *inode = dentry->d_inode;
+        struct ctl_table_header *head = grab_header(inode);
+        struct ctl_table *table = PROC_I(inode)->sysctl_entry;
+        if (IS_ERR(head))
+                return PTR_ERR(head);
+        generic_fillattr(inode, stat);
+        if (table)
+                stat->mode = (stat->mode & S_IFMT) | table->mode;
+        sysctl_head_finish(head);
+        return 0;
+}
 static const struct file_operations proc_sys_file_operations = {
        .read           = proc_sys_read,
        .write          = proc_sys_write,
+};
+static const struct file_operations proc_sys_dir_file_operations = {
        .readdir        = proc_sys_readdir,
 };
 static const struct inode_operations proc_sys_inode_operations = {
+        .permission     = proc_sys_permission,
+        .setattr        = proc_sys_setattr,
+        .getattr        = proc_sys_getattr,
+};
+static const struct inode_operations proc_sys_dir_operations = {
        .lookup         = proc_sys_lookup,
        .permission     = proc_sys_permission,
        .setattr        = proc_sys_setattr,
+        .getattr        = proc_sys_getattr,
 };
 static int proc_sys_revalidate(struct dentry *dentry, struct nameidata *nd)
 {
-        struct ctl_table_header *head;
+        return !PROC_I(dentry->d_inode)->sysctl->unregistering;
-        struct ctl_table *table;
+}
-        table = do_proc_sys_lookup(dentry->d_parent, &dentry->d_name, &head);
-        proc_sys_refresh_inode(dentry->d_inode, table);
+static int proc_sys_delete(struct dentry *dentry)
-        sysctl_head_finish(head);
+{
-        return !!table;
+        return !!PROC_I(dentry->d_inode)->sysctl->unregistering;
+}
+static int proc_sys_compare(struct dentry *dir, struct qstr *qstr,
+                            struct qstr *name)
+{
+        struct dentry *dentry = container_of(qstr, struct dentry, d_name);
+        if (qstr->len != name->len)
+                return 1;
+        if (memcmp(qstr->name, name->name, name->len))
+                return 1;
+        return !sysctl_is_seen(PROC_I(dentry->d_inode)->sysctl);
 }
 static struct dentry_operations proc_sys_dentry_operations = {
        .d_revalidate   = proc_sys_revalidate,
+        .d_delete       = proc_sys_delete,
+        .d_compare      = proc_sys_compare,
 };
 static struct proc_dir_entry *proc_sys_root;
@@ -443,8 +400,8 @@ static struct proc_dir_entry *proc_sys_root;
 int proc_sys_init(void)
 {
        proc_sys_root = proc_mkdir("sys", NULL);
-        proc_sys_root->proc_iops = &proc_sys_inode_operations;
+        proc_sys_root->proc_iops = &proc_sys_dir_operations;
-        proc_sys_root->proc_fops = &proc_sys_file_operations;
+        proc_sys_root->proc_fops = &proc_sys_dir_file_operations;
        proc_sys_root->nlink = 0;
        return 0;
 }
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index d7c4935c1034..bb3cb5b7cdb2 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -1250,7 +1250,7 @@ static int reiserfs_check_acl(struct inode *inode, int mask)
        return error;
 }
-int reiserfs_permission(struct inode *inode, int mask, struct nameidata *nd)
+int reiserfs_permission(struct inode *inode, int mask)
 {
        /*
         * We don't do permission checks on the internal objects.
diff --git a/fs/smbfs/file.c b/fs/smbfs/file.c
index 2294783320cb..e4f8d51a5553 100644
--- a/fs/smbfs/file.c
+++ b/fs/smbfs/file.c
@@ -408,7 +408,7 @@ smb_file_release(struct inode *inode, struct file * file)
 * privileges, so we need our own check for this.
 */
 static int
-smb_file_permission(struct inode *inode, int mask, struct nameidata *nd)
+smb_file_permission(struct inode *inode, int mask)
 {
        int mode = inode->i_mode;
        int error = 0;
@@ -417,7 +417,7 @@ smb_file_permission(struct inode *inode, int mask, struct nameidata *nd)
        /* Look at user permissions */
        mode >>= 6;
-        if ((mode & 7 & mask) != mask)
+        if (mask & ~mode & (MAY_READ | MAY_WRITE | MAY_EXEC))
                error = -EACCES;
        return error;
 }
diff --git a/fs/splice.c b/fs/splice.c
index 47dc1a445d1f..b30311ba8af6 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -772,7 +772,7 @@ generic_file_splice_write_nolock(struct pipe_inode_info *pipe, struct file *out,
        ssize_t ret;
        int err;
-        err = remove_suid(out->f_path.dentry);
+        err = file_remove_suid(out);
        if (unlikely(err))
                return err;
@@ -830,7 +830,7 @@ generic_file_splice_write(struct pipe_inode_info *pipe, struct file *out,
        ssize_t ret;
        inode_double_lock(inode, pipe->inode);
-        ret = remove_suid(out->f_path.dentry);
+        ret = file_remove_suid(out);
        if (likely(!ret))
                ret = __splice_from_pipe(pipe, &sd, pipe_to_file);
        inode_double_unlock(inode, pipe->inode);
diff --git a/fs/stat.c b/fs/stat.c
index 9cf41f719d50..7c46fbeb8b76 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -57,13 +57,13 @@ EXPORT_SYMBOL(vfs_getattr);
 int vfs_stat_fd(int dfd, char __user *name, struct kstat *stat)
 {
-        struct nameidata nd;
+        struct path path;
        int error;
-        error = __user_walk_fd(dfd, name, LOOKUP_FOLLOW, &nd);
+        error = user_path_at(dfd, name, LOOKUP_FOLLOW, &path);
        if (!error) {
-                error = vfs_getattr(nd.path.mnt, nd.path.dentry, stat);
+                error = vfs_getattr(path.mnt, path.dentry, stat);
-                path_put(&nd.path);
+                path_put(&path);
        }
        return error;
 }
@@ -77,13 +77,13 @@ EXPORT_SYMBOL(vfs_stat);
 int vfs_lstat_fd(int dfd, char __user *name, struct kstat *stat)
 {
-        struct nameidata nd;
+        struct path path;
        int error;
-        error = __user_walk_fd(dfd, name, 0, &nd);
+        error = user_path_at(dfd, name, 0, &path);
        if (!error) {
-                error = vfs_getattr(nd.path.mnt, nd.path.dentry, stat);
+                error = vfs_getattr(path.mnt, path.dentry, stat);
-                path_put(&nd.path);
+                path_put(&path);
        }
        return error;
 }
@@ -291,29 +291,29 @@ asmlinkage long sys_newfstat(unsigned int fd, struct stat __user *statbuf)
        return error;
 }
-asmlinkage long sys_readlinkat(int dfd, const char __user *path,
+asmlinkage long sys_readlinkat(int dfd, const char __user *pathname,
                                char __user *buf, int bufsiz)
 {
-        struct nameidata nd;
+        struct path path;
        int error;
        if (bufsiz <= 0)
                return -EINVAL;
-        error = __user_walk_fd(dfd, path, 0, &nd);
+        error = user_path_at(dfd, pathname, 0, &path);
        if (!error) {
-                struct inode *inode = nd.path.dentry->d_inode;
+                struct inode *inode = path.dentry->d_inode;
                error = -EINVAL;
                if (inode->i_op && inode->i_op->readlink) {
-                        error = security_inode_readlink(nd.path.dentry);
+                        error = security_inode_readlink(path.dentry);
                        if (!error) {
-                                touch_atime(nd.path.mnt, nd.path.dentry);
+                                touch_atime(path.mnt, path.dentry);
-                                error = inode->i_op->readlink(nd.path.dentry,
+                                error = inode->i_op->readlink(path.dentry,
                                                              buf, bufsiz);
                        }
                }
-                path_put(&nd.path);
+                path_put(&path);
        }
        return error;
 }
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index 005a3b854d96..8565e586e533 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -53,6 +53,7 @@
 #include "ubifs.h"
 #include <linux/mount.h>
+#include <linux/namei.h>
 static int read_block(struct inode *inode, void *addr, unsigned int block,
                      struct ubifs_data_node *dn)
diff --git a/fs/utimes.c b/fs/utimes.c
index b6b664e7145e..6929e3e91d05 100644
--- a/fs/utimes.c
+++ b/fs/utimes.c
@@ -48,66 +48,22 @@ static bool nsec_valid(long nsec)
        return nsec >= 0 && nsec <= 999999999;
 }
-/* If times==NULL, set access and modification to current time,
+static int utimes_common(struct path *path, struct timespec *times)
- * must be owner or have write permission.
- * Else, update from *times, must be owner or super user.
- */
-long do_utimes(int dfd, char __user *filename, struct timespec *times, int flags)
 {
        int error;
-        struct nameidata nd;
-        struct dentry *dentry;
-        struct inode *inode;
        struct iattr newattrs;
-        struct file *f = NULL;
+        struct inode *inode = path->dentry->d_inode;
-        struct vfsmount *mnt;
-        error = -EINVAL;
-        if (times && (!nsec_valid(times[0].tv_nsec) ||
-                      !nsec_valid(times[1].tv_nsec))) {
-                goto out;
-        }
-        if (flags & ~AT_SYMLINK_NOFOLLOW)
-                goto out;
-        if (filename == NULL && dfd != AT_FDCWD) {
-                error = -EINVAL;
-                if (flags & AT_SYMLINK_NOFOLLOW)
-                        goto out;
-                error = -EBADF;
+        error = mnt_want_write(path->mnt);
-                f = fget(dfd);
-                if (!f)
-                        goto out;
-                dentry = f->f_path.dentry;
-                mnt = f->f_path.mnt;
-        } else {
-                error = __user_walk_fd(dfd, filename, (flags & AT_SYMLINK_NOFOLLOW) ? 0 : LOOKUP_FOLLOW, &nd);
-                if (error)
-                        goto out;
-                dentry = nd.path.dentry;
-                mnt = nd.path.mnt;
-        }
-        inode = dentry->d_inode;
-        error = mnt_want_write(mnt);
        if (error)
-                goto dput_and_out;
+                goto out;
        if (times && times[0].tv_nsec == UTIME_NOW &&
                     times[1].tv_nsec == UTIME_NOW)
                times = NULL;
-        /* In most cases, the checks are done in inode_change_ok() */
        newattrs.ia_valid = ATTR_CTIME | ATTR_MTIME | ATTR_ATIME;
        if (times) {
-                error = -EPERM;
-                if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
-                        goto mnt_drop_write_and_out;
                if (times[0].tv_nsec == UTIME_OMIT)
                        newattrs.ia_valid &= ~ATTR_ATIME;
                else if (times[0].tv_nsec != UTIME_NOW) {
@@ -123,21 +79,13 @@ long do_utimes(int dfd, char __user *filename, struct timespec *times, int flags
                        newattrs.ia_mtime.tv_nsec = times[1].tv_nsec;
                        newattrs.ia_valid |= ATTR_MTIME_SET;
                }
                /*
-                 * For the UTIME_OMIT/UTIME_NOW and UTIME_NOW/UTIME_OMIT
+                 * Tell inode_change_ok(), that this is an explicit time
-                 * cases, we need to make an extra check that is not done by
+                 * update, even if neither ATTR_ATIME_SET nor ATTR_MTIME_SET
-                 * inode_change_ok().
+                 * were used.
                 */
-                if (((times[0].tv_nsec == UTIME_NOW &&
+                newattrs.ia_valid |= ATTR_TIMES_SET;
-                            times[1].tv_nsec == UTIME_OMIT)
-                     ||
-                     (times[0].tv_nsec == UTIME_OMIT &&
-                            times[1].tv_nsec == UTIME_NOW))
-                    && !is_owner_or_cap(inode))
-                        goto mnt_drop_write_and_out;
        } else {
                /*
                 * If times is NULL (or both times are UTIME_NOW),
                 * then we need to check permissions, because
@@ -148,21 +96,76 @@ long do_utimes(int dfd, char __user *filename, struct timespec *times, int flags
                        goto mnt_drop_write_and_out;
                if (!is_owner_or_cap(inode)) {
-                        error = permission(inode, MAY_WRITE, NULL);
+                        error = inode_permission(inode, MAY_WRITE);
                        if (error)
                                goto mnt_drop_write_and_out;
                }
        }
        mutex_lock(&inode->i_mutex);
-        error = notify_change(dentry, &newattrs);
+        error = notify_change(path->dentry, &newattrs);
        mutex_unlock(&inode->i_mutex);
 mnt_drop_write_and_out:
-        mnt_drop_write(mnt);
+        mnt_drop_write(path->mnt);
-dput_and_out:
+out:
-        if (f)
+        return error;
-                fput(f);
+}
-        else
-                path_put(&nd.path);
+/*
+ * do_utimes - change times on filename or file descriptor
+ * @dfd: open file descriptor, -1 or AT_FDCWD
+ * @filename: path name or NULL
+ * @times: new times or NULL
+ * @flags: zero or more flags (only AT_SYMLINK_NOFOLLOW for the moment)
+ *
+ * If filename is NULL and dfd refers to an open file, then operate on
+ * the file.  Otherwise look up filename, possibly using dfd as a
+ * starting point.
+ *
+ * If times==NULL, set access and modification to current time,
+ * must be owner or have write permission.
+ * Else, update from *times, must be owner or super user.
+ */
+long do_utimes(int dfd, char __user *filename, struct timespec *times, int flags)
+{
+        int error = -EINVAL;
+        if (times && (!nsec_valid(times[0].tv_nsec) ||
+                      !nsec_valid(times[1].tv_nsec))) {
+                goto out;
+        }
+        if (flags & ~AT_SYMLINK_NOFOLLOW)
+                goto out;
+        if (filename == NULL && dfd != AT_FDCWD) {
+                struct file *file;
+                if (flags & AT_SYMLINK_NOFOLLOW)
+                        goto out;
+                file = fget(dfd);
+                error = -EBADF;
+                if (!file)
+                        goto out;
+                error = utimes_common(&file->f_path, times);
+                fput(file);
+        } else {
+                struct path path;
+                int lookup_flags = 0;
+                if (!(flags & AT_SYMLINK_NOFOLLOW))
+                        lookup_flags |= LOOKUP_FOLLOW;
+                error = user_path_at(dfd, filename, lookup_flags, &path);
+                if (error)
+                        goto out;
+                error = utimes_common(&path, times);
+                path_put(&path);
+        }
 out:
        return error;
 }
diff --git a/fs/xattr.c b/fs/xattr.c
index 4706a8b1f495..468377e66531 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -63,7 +63,7 @@ xattr_permission(struct inode *inode, const char *name, int mask)
                        return -EPERM;
        }
-        return permission(inode, mask, NULL);
+        return inode_permission(inode, mask);
 }
 int
@@ -252,40 +252,40 @@ setxattr(struct dentry *d, const char __user *name, const void __user *value,
 }
 asmlinkage long
-sys_setxattr(const char __user *path, const char __user *name,
+sys_setxattr(const char __user *pathname, const char __user *name,
             const void __user *value, size_t size, int flags)
 {
-        struct nameidata nd;
+        struct path path;
        int error;
-        error = user_path_walk(path, &nd);
+        error = user_path(pathname, &path);
        if (error)
                return error;
-        error = mnt_want_write(nd.path.mnt);
+        error = mnt_want_write(path.mnt);
        if (!error) {
-                error = setxattr(nd.path.dentry, name, value, size, flags);
+                error = setxattr(path.dentry, name, value, size, flags);
-                mnt_drop_write(nd.path.mnt);
+                mnt_drop_write(path.mnt);
        }
-        path_put(&nd.path);
+        path_put(&path);
        return error;
 }
 asmlinkage long
-sys_lsetxattr(const char __user *path, const char __user *name,
+sys_lsetxattr(const char __user *pathname, const char __user *name,
              const void __user *value, size_t size, int flags)
 {
-        struct nameidata nd;
+        struct path path;
        int error;
-        error = user_path_walk_link(path, &nd);
+        error = user_lpath(pathname, &path);
        if (error)
                return error;
-        error = mnt_want_write(nd.path.mnt);
+        error = mnt_want_write(path.mnt);
        if (!error) {
-                error = setxattr(nd.path.dentry, name, value, size, flags);
+                error = setxattr(path.dentry, name, value, size, flags);
-                mnt_drop_write(nd.path.mnt);
+                mnt_drop_write(path.mnt);
        }
-        path_put(&nd.path);
+        path_put(&path);
        return error;
 }
@@ -350,32 +350,32 @@ getxattr(struct dentry *d, const char __user *name, void __user *value,
 }
 asmlinkage ssize_t
-sys_getxattr(const char __user *path, const char __user *name,
+sys_getxattr(const char __user *pathname, const char __user *name,
             void __user *value, size_t size)
 {
-        struct nameidata nd;
+        struct path path;
        ssize_t error;
-        error = user_path_walk(path, &nd);
+        error = user_path(pathname, &path);
        if (error)
                return error;
-        error = getxattr(nd.path.dentry, name, value, size);
+        error = getxattr(path.dentry, name, value, size);
-        path_put(&nd.path);
+        path_put(&path);
        return error;
 }
 asmlinkage ssize_t
-sys_lgetxattr(const char __user *path, const char __user *name, void __user *value,
+sys_lgetxattr(const char __user *pathname, const char __user *name, void __user *value,
              size_t size)
 {
-        struct nameidata nd;
+        struct path path;
        ssize_t error;
-        error = user_path_walk_link(path, &nd);
+        error = user_lpath(pathname, &path);
        if (error)
                return error;
-        error = getxattr(nd.path.dentry, name, value, size);
+        error = getxattr(path.dentry, name, value, size);
-        path_put(&nd.path);
+        path_put(&path);
        return error;
 }
@@ -425,30 +425,30 @@ listxattr(struct dentry *d, char __user *list, size_t size)
 }
 asmlinkage ssize_t
-sys_listxattr(const char __user *path, char __user *list, size_t size)
+sys_listxattr(const char __user *pathname, char __user *list, size_t size)
 {
-        struct nameidata nd;
+        struct path path;
        ssize_t error;
-        error = user_path_walk(path, &nd);
+        error = user_path(pathname, &path);
        if (error)
                return error;
-        error = listxattr(nd.path.dentry, list, size);
+        error = listxattr(path.dentry, list, size);
-        path_put(&nd.path);
+        path_put(&path);
        return error;
 }
 asmlinkage ssize_t
-sys_llistxattr(const char __user *path, char __user *list, size_t size)
+sys_llistxattr(const char __user *pathname, char __user *list, size_t size)
 {
-        struct nameidata nd;
+        struct path path;
        ssize_t error;
-        error = user_path_walk_link(path, &nd);
+        error = user_lpath(pathname, &path);
        if (error)
                return error;
-        error = listxattr(nd.path.dentry, list, size);
+        error = listxattr(path.dentry, list, size);
-        path_put(&nd.path);
+        path_put(&path);
        return error;
 }
@@ -486,38 +486,38 @@ removexattr(struct dentry *d, const char __user *name)
 }
 asmlinkage long
-sys_removexattr(const char __user *path, const char __user *name)
+sys_removexattr(const char __user *pathname, const char __user *name)
 {
-        struct nameidata nd;
+        struct path path;
        int error;
-        error = user_path_walk(path, &nd);
+        error = user_path(pathname, &path);
        if (error)
                return error;
-        error = mnt_want_write(nd.path.mnt);
+        error = mnt_want_write(path.mnt);
        if (!error) {
-                error = removexattr(nd.path.dentry, name);
+                error = removexattr(path.dentry, name);
-                mnt_drop_write(nd.path.mnt);
+                mnt_drop_write(path.mnt);
        }
-        path_put(&nd.path);
+        path_put(&path);
        return error;
 }
 asmlinkage long
-sys_lremovexattr(const char __user *path, const char __user *name)
+sys_lremovexattr(const char __user *pathname, const char __user *name)
 {
-        struct nameidata nd;
+        struct path path;
        int error;
-        error = user_path_walk_link(path, &nd);
+        error = user_lpath(pathname, &path);
        if (error)
                return error;
-        error = mnt_want_write(nd.path.mnt);
+        error = mnt_want_write(path.mnt);
        if (!error) {
-                error = removexattr(nd.path.dentry, name);
+                error = removexattr(path.dentry, name);
-                mnt_drop_write(nd.path.mnt);
+                mnt_drop_write(path.mnt);
        }
-        path_put(&nd.path);
+        path_put(&path);
        return error;
 }
diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c
index a42ba9d71156..01939ba2d8de 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl.c
@@ -84,17 +84,15 @@ xfs_find_handle(
        switch (cmd) {
        case XFS_IOC_PATH_TO_FSHANDLE:
        case XFS_IOC_PATH_TO_HANDLE: {
-                struct nameidata        nd;
+                struct path path;
-                int                     error;
+                int error = user_lpath((const char __user *)hreq.path, &path);
-                error = user_path_walk_link((const char __user *)hreq.path, &nd);
                if (error)
                        return error;
-                ASSERT(nd.path.dentry);
+                ASSERT(path.dentry);
-                ASSERT(nd.path.dentry->d_inode);
+                ASSERT(path.dentry->d_inode);
-                inode = igrab(nd.path.dentry->d_inode);
+                inode = igrab(path.dentry->d_inode);
-                path_put(&nd.path);
+                path_put(&path);
                break;
        }
diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c
index 2bf287ef5489..5fc61c824bb9 100644
--- a/fs/xfs/linux-2.6/xfs_iops.c
+++ b/fs/xfs/linux-2.6/xfs_iops.c
@@ -589,8 +589,7 @@ xfs_check_acl(
 STATIC int
 xfs_vn_permission(
        struct inode            *inode,
-        int                     mask,
+        int                     mask)
-        struct nameidata        *nd)
 {
        return generic_permission(inode, mask, xfs_check_acl);
 }
diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index 5e3b57516ec7..82333b3e118e 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -711,7 +711,7 @@ start:
             !capable(CAP_FSETID)) {
                error = xfs_write_clear_setuid(xip);
                if (likely(!error))
-                        error = -remove_suid(file->f_path.dentry);
+                        error = -file_remove_suid(file);
                if (unlikely(error)) {
                        goto out_unlock_internal;
                }
diff --git a/include/asm-alpha/namei.h b/include/asm-alpha/namei.h
deleted file mode 100644
index 5cc9bb39499d..000000000000
--- a/include/asm-alpha/namei.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/* $Id: namei.h,v 1.1 1996/12/13 14:48:21 jj Exp $
- * linux/include/asm-alpha/namei.h
- *
- * Included from linux/fs/namei.c
- */
-#ifndef __ALPHA_NAMEI_H
-#define __ALPHA_NAMEI_H
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-#define __emul_prefix() NULL
-#endif /* __ALPHA_NAMEI_H */
diff --git a/include/asm-arm/namei.h b/include/asm-arm/namei.h
deleted file mode 100644
index a402d3b9d0f7..000000000000
--- a/include/asm-arm/namei.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/* 
- * linux/include/asm-arm/namei.h
- *
- * Routines to handle famous /usr/gnemul
- * Derived from the Sparc version of this file
- *
- * Included from linux/fs/namei.c
- */
-#ifndef __ASMARM_NAMEI_H
-#define __ASMARM_NAMEI_H
-#define ARM_BSD_EMUL "usr/gnemul/bsd/"
-static inline char *__emul_prefix(void)
-{
-        switch (current->personality) {
-        case PER_BSD:
-                return ARM_BSD_EMUL;
-        default:
-                return NULL;
-        }
-}
-#endif /* __ASMARM_NAMEI_H */
diff --git a/include/asm-avr32/namei.h b/include/asm-avr32/namei.h
deleted file mode 100644
index f0a26de06cab..000000000000
--- a/include/asm-avr32/namei.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#ifndef __ASM_AVR32_NAMEI_H
-#define __ASM_AVR32_NAMEI_H
-/* This dummy routine may be changed to something useful */
-#define __emul_prefix() NULL
-#endif /* __ASM_AVR32_NAMEI_H */
diff --git a/include/asm-blackfin/namei.h b/include/asm-blackfin/namei.h
deleted file mode 100644
index 8b89a2d65cb4..000000000000
--- a/include/asm-blackfin/namei.h
+++ /dev/null
@@ -1,19 +0,0 @@
-/*
- * linux/include/asm/namei.h
- *
- * Included from linux/fs/namei.c
- *
- * Changes made by Lineo Inc.    May 2001
- */
-#ifndef __BFIN_NAMEI_H
-#define __BFIN_NAMEI_H
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-#define __emul_prefix() NULL
-#endif
diff --git a/include/asm-cris/namei.h b/include/asm-cris/namei.h
deleted file mode 100644
index 8a3be7a6d9f6..000000000000
--- a/include/asm-cris/namei.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/* $Id: namei.h,v 1.1 2000/07/10 16:32:31 bjornw Exp $
- * linux/include/asm-cris/namei.h
- *
- * Included from linux/fs/namei.c
- */
-#ifndef __CRIS_NAMEI_H
-#define __CRIS_NAMEI_H
-/* used to find file-system prefixes for doing emulations
- * see for example asm-sparc/namei.h
- * we don't use it...
- */
-#define __emul_prefix() NULL
-#endif /* __CRIS_NAMEI_H */
diff --git a/include/asm-frv/namei.h b/include/asm-frv/namei.h
deleted file mode 100644
index 4ea57171d951..000000000000
--- a/include/asm-frv/namei.h
+++ /dev/null
@@ -1,18 +0,0 @@
-/*
- * include/asm-frv/namei.h
- *
- * Included from linux/fs/namei.c
- */
-#ifndef __ASM_NAMEI_H
-#define __ASM_NAMEI_H
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-#define __emul_prefix() NULL
-#endif
diff --git a/include/asm-h8300/namei.h b/include/asm-h8300/namei.h
deleted file mode 100644
index ab6f196db6e0..000000000000
--- a/include/asm-h8300/namei.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/*
- * linux/include/asm-h8300/namei.h
- *
- * Included from linux/fs/namei.c
- */
-#ifndef __H8300_NAMEI_H
-#define __H8300_NAMEI_H
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-#define __emul_prefix() NULL
-#endif
diff --git a/include/asm-ia64/namei.h b/include/asm-ia64/namei.h
deleted file mode 100644
index 78e768079083..000000000000
--- a/include/asm-ia64/namei.h
+++ /dev/null
@@ -1,25 +0,0 @@
-#ifndef _ASM_IA64_NAMEI_H
-#define _ASM_IA64_NAMEI_H
-/*
- * Modified 1998, 1999, 2001
- *      David Mosberger-Tang <davidm@hpl.hp.com>, Hewlett-Packard Co
- */
-#include <asm/ptrace.h>
-#include <asm/system.h>
-#define EMUL_PREFIX_LINUX_IA32 "/emul/ia32-linux/"
-static inline char *
-__emul_prefix (void)
-{
-        switch (current->personality) {
-              case PER_LINUX32:
-                return EMUL_PREFIX_LINUX_IA32;
-              default:
-                return NULL;
-        }
-}
-#endif /* _ASM_IA64_NAMEI_H */
diff --git a/include/asm-m32r/namei.h b/include/asm-m32r/namei.h
deleted file mode 100644
index 210f8056b805..000000000000
--- a/include/asm-m32r/namei.h
+++ /dev/null
@@ -1,17 +0,0 @@
-#ifndef _ASM_M32R_NAMEI_H
-#define _ASM_M32R_NAMEI_H
-/*
- * linux/include/asm-m32r/namei.h
- *
- * Included from linux/fs/namei.c
- */
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-#define __emul_prefix() NULL
-#endif /* _ASM_M32R_NAMEI_H */
diff --git a/include/asm-m68k/namei.h b/include/asm-m68k/namei.h
deleted file mode 100644
index f33f243b644a..000000000000
--- a/include/asm-m68k/namei.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/*
- * linux/include/asm-m68k/namei.h
- *
- * Included from linux/fs/namei.c
- */
-#ifndef __M68K_NAMEI_H
-#define __M68K_NAMEI_H
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-#define __emul_prefix() NULL
-#endif
diff --git a/include/asm-m68knommu/namei.h b/include/asm-m68knommu/namei.h
deleted file mode 100644
index 31a85d27b931..000000000000
--- a/include/asm-m68knommu/namei.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-m68k/namei.h>
diff --git a/include/asm-mips/namei.h b/include/asm-mips/namei.h
deleted file mode 100644
index a6605a752469..000000000000
--- a/include/asm-mips/namei.h
+++ /dev/null
@@ -1,11 +0,0 @@
-#ifndef _ASM_NAMEI_H
-#define _ASM_NAMEI_H
-/*
- * This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- */
-#define __emul_prefix() NULL
-#endif /* _ASM_NAMEI_H */
diff --git a/include/asm-mn10300/namei.h b/include/asm-mn10300/namei.h
deleted file mode 100644
index bd9ce94aeb65..000000000000
--- a/include/asm-mn10300/namei.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/* Emulation stuff
- *
- * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
- */
-#ifndef _ASM_NAMEI_H
-#define _ASM_NAMEI_H
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-#define __emul_prefix() NULL
-#endif /* _ASM_NAMEI_H */
diff --git a/include/asm-parisc/namei.h b/include/asm-parisc/namei.h
deleted file mode 100644
index 8d29b3d9fb33..000000000000
--- a/include/asm-parisc/namei.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/* $Id: namei.h,v 1.1 1996/12/13 14:48:21 jj Exp $
- * linux/include/asm-parisc/namei.h
- *
- * Included from linux/fs/namei.c
- */
-#ifndef __PARISC_NAMEI_H
-#define __PARISC_NAMEI_H
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-#define __emul_prefix() NULL
-#endif /* __PARISC_NAMEI_H */
diff --git a/include/asm-powerpc/namei.h b/include/asm-powerpc/namei.h
deleted file mode 100644
index 657443474a6a..000000000000
--- a/include/asm-powerpc/namei.h
+++ /dev/null
@@ -1,20 +0,0 @@
-#ifndef _ASM_POWERPC_NAMEI_H
-#define _ASM_POWERPC_NAMEI_H
-#ifdef __KERNEL__
-/*
- * Adapted from include/asm-alpha/namei.h
- *
- * Included from fs/namei.c
- */
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-#define __emul_prefix() NULL
-#endif  /* __KERNEL__ */
-#endif  /* _ASM_POWERPC_NAMEI_H */
diff --git a/include/asm-s390/namei.h b/include/asm-s390/namei.h
deleted file mode 100644
index 3e286bdde4b0..000000000000
--- a/include/asm-s390/namei.h
+++ /dev/null
@@ -1,21 +0,0 @@
-/*
- *  include/asm-s390/namei.h
- *
- *  S390 version
- *
- *  Derived from "include/asm-i386/namei.h"
- *
- *  Included from linux/fs/namei.c
- */
-#ifndef __S390_NAMEI_H
-#define __S390_NAMEI_H
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-#define __emul_prefix() NULL
-#endif /* __S390_NAMEI_H */
diff --git a/include/asm-sh/namei.h b/include/asm-sh/namei.h
deleted file mode 100644
index 338a5d947143..000000000000
--- a/include/asm-sh/namei.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/* $Id: namei.h,v 1.3 2000/07/04 06:24:49 gniibe Exp $
- * linux/include/asm-sh/namei.h
- *
- * Included from linux/fs/namei.c
- */
-#ifndef __ASM_SH_NAMEI_H
-#define __ASM_SH_NAMEI_H
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-#define __emul_prefix() NULL
-#endif /* __ASM_SH_NAMEI_H */
diff --git a/include/asm-sparc/namei.h b/include/asm-sparc/namei.h
deleted file mode 100644
index eff944b8e321..000000000000
--- a/include/asm-sparc/namei.h
+++ /dev/null
@@ -1,8 +0,0 @@
-#ifndef ___ASM_SPARC_NAMEI_H
-#define ___ASM_SPARC_NAMEI_H
-#if defined(__sparc__) && defined(__arch64__)
-#include <asm-sparc/namei_64.h>
-#else
-#include <asm-sparc/namei_32.h>
-#endif
-#endif
diff --git a/include/asm-sparc/namei_32.h b/include/asm-sparc/namei_32.h
deleted file mode 100644
index 0646102fb020..000000000000
--- a/include/asm-sparc/namei_32.h
+++ /dev/null
@@ -1,13 +0,0 @@
-/*
- * linux/include/asm-sparc/namei.h
- *
- * Routines to handle famous /usr/gnemul/s*.
- * Included from linux/fs/namei.c
- */
-#ifndef __SPARC_NAMEI_H
-#define __SPARC_NAMEI_H
-#define __emul_prefix() NULL
-#endif /* __SPARC_NAMEI_H */
diff --git a/include/asm-sparc/namei_64.h b/include/asm-sparc/namei_64.h
deleted file mode 100644
index cbc1b4c06891..000000000000
--- a/include/asm-sparc/namei_64.h
+++ /dev/null
@@ -1,13 +0,0 @@
-/*
- * linux/include/asm-sparc64/namei.h
- *
- * Routines to handle famous /usr/gnemul/s*.
- * Included from linux/fs/namei.c
- */
-#ifndef __SPARC64_NAMEI_H
-#define __SPARC64_NAMEI_H
-#define __emul_prefix() NULL
-#endif /* __SPARC64_NAMEI_H */
diff --git a/include/asm-sparc64/namei.h b/include/asm-sparc64/namei.h
deleted file mode 100644
index 1344a910ba2f..000000000000
--- a/include/asm-sparc64/namei.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-sparc/namei.h>
diff --git a/include/asm-um/namei.h b/include/asm-um/namei.h
deleted file mode 100644
index 002984d5bc85..000000000000
--- a/include/asm-um/namei.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef __UM_NAMEI_H
-#define __UM_NAMEI_H
-#include "asm/arch/namei.h"
-#endif
diff --git a/include/asm-v850/namei.h b/include/asm-v850/namei.h
deleted file mode 100644
index ee8339b23843..000000000000
--- a/include/asm-v850/namei.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/*
- * linux/include/asm-v850/namei.h
- *
- * Included from linux/fs/namei.c
- */
-#ifndef __V850_NAMEI_H__
-#define __V850_NAMEI_H__
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-#define __emul_prefix() NULL
-#endif /* __V850_NAMEI_H__ */
diff --git a/include/asm-x86/namei.h b/include/asm-x86/namei.h
deleted file mode 100644
index 415ef5d9550e..000000000000
--- a/include/asm-x86/namei.h
+++ /dev/null
@@ -1,11 +0,0 @@
-#ifndef _ASM_X86_NAMEI_H
-#define _ASM_X86_NAMEI_H
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-#define __emul_prefix() NULL
-#endif /* _ASM_X86_NAMEI_H */
diff --git a/include/asm-xtensa/namei.h b/include/asm-xtensa/namei.h
deleted file mode 100644
index 3fdff039d27d..000000000000
--- a/include/asm-xtensa/namei.h
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * include/asm-xtensa/namei.h
- *
- * Included from linux/fs/namei.c
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2001 - 2005 Tensilica Inc.
- */
-#ifndef _XTENSA_NAMEI_H
-#define _XTENSA_NAMEI_H
-#ifdef __KERNEL__
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-#define __emul_prefix() NULL
-#endif  /* __KERNEL__ */
-#endif  /* _XTENSA_NAMEI_H */
diff --git a/include/linux/coda_linux.h b/include/linux/coda_linux.h
index 31b75311e2ca..dcc228aa335a 100644
--- a/include/linux/coda_linux.h
+++ b/include/linux/coda_linux.h
@@ -37,7 +37,7 @@ extern const struct file_operations coda_ioctl_operations;
 /* operations shared over more than one file */
 int coda_open(struct inode *i, struct file *f);
 int coda_release(struct inode *i, struct file *f);
-int coda_permission(struct inode *inode, int mask, struct nameidata *nd);
+int coda_permission(struct inode *inode, int mask);
 int coda_revalidate_inode(struct dentry *);
 int coda_getattr(struct vfsmount *, struct dentry *, struct kstat *);
 int coda_setattr(struct dentry *, struct iattr *);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 53d2edb709b3..8252b045e624 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -60,6 +60,8 @@ extern int dir_notify_enable;
 #define MAY_WRITE 2
 #define MAY_READ 4
 #define MAY_APPEND 8
+#define MAY_ACCESS 16
+#define MAY_OPEN 32
 #define FMODE_READ 1
 #define FMODE_WRITE 2
@@ -277,7 +279,7 @@ extern int dir_notify_enable;
 #include <linux/types.h>
 #include <linux/kdev_t.h>
 #include <linux/dcache.h>
-#include <linux/namei.h>
+#include <linux/path.h>
 #include <linux/stat.h>
 #include <linux/cache.h>
 #include <linux/kobject.h>
@@ -318,22 +320,23 @@ typedef void (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
 * Attribute flags.  These should be or-ed together to figure out what
 * has been changed!
 */
-#define ATTR_MODE       1
+#define ATTR_MODE       (1 << 0)
-#define ATTR_UID        2
+#define ATTR_UID        (1 << 1)
-#define ATTR_GID        4
+#define ATTR_GID        (1 << 2)
-#define ATTR_SIZE       8
+#define ATTR_SIZE       (1 << 3)
-#define ATTR_ATIME      16
+#define ATTR_ATIME      (1 << 4)
-#define ATTR_MTIME      32
+#define ATTR_MTIME      (1 << 5)
-#define ATTR_CTIME      64
+#define ATTR_CTIME      (1 << 6)
-#define ATTR_ATIME_SET  128
+#define ATTR_ATIME_SET  (1 << 7)
-#define ATTR_MTIME_SET  256
+#define ATTR_MTIME_SET  (1 << 8)
-#define ATTR_FORCE      512     /* Not a change, but a change it */
+#define ATTR_FORCE      (1 << 9) /* Not a change, but a change it */
-#define ATTR_ATTR_FLAG  1024
+#define ATTR_ATTR_FLAG  (1 << 10)
-#define ATTR_KILL_SUID  2048
+#define ATTR_KILL_SUID  (1 << 11)
-#define ATTR_KILL_SGID  4096
+#define ATTR_KILL_SGID  (1 << 12)
-#define ATTR_FILE       8192
+#define ATTR_FILE       (1 << 13)
-#define ATTR_KILL_PRIV  16384
+#define ATTR_KILL_PRIV  (1 << 14)
-#define ATTR_OPEN       32768   /* Truncating from open(O_TRUNC) */
+#define ATTR_OPEN       (1 << 15) /* Truncating from open(O_TRUNC) */
+#define ATTR_TIMES_SET  (1 << 16)
 /*
 * This is the Inode Attributes structure, used for notify_change().  It
@@ -792,7 +795,7 @@ struct file {
 #define f_dentry        f_path.dentry
 #define f_vfsmnt        f_path.mnt
        const struct file_operations    *f_op;
-        atomic_t                f_count;
+        atomic_long_t           f_count;
        unsigned int            f_flags;
        mode_t                  f_mode;
        loff_t                  f_pos;
@@ -821,8 +824,8 @@ extern spinlock_t files_lock;
 #define file_list_lock() spin_lock(&files_lock);
 #define file_list_unlock() spin_unlock(&files_lock);
-#define get_file(x)     atomic_inc(&(x)->f_count)
+#define get_file(x)     atomic_long_inc(&(x)->f_count)
-#define file_count(x)   atomic_read(&(x)->f_count)
+#define file_count(x)   atomic_long_read(&(x)->f_count)
 #ifdef CONFIG_DEBUG_WRITECOUNT
 static inline void file_take_write(struct file *f)
@@ -1136,7 +1139,7 @@ extern int vfs_permission(struct nameidata *, int);
 extern int vfs_create(struct inode *, struct dentry *, int, struct nameidata *);
 extern int vfs_mkdir(struct inode *, struct dentry *, int);
 extern int vfs_mknod(struct inode *, struct dentry *, int, dev_t);
-extern int vfs_symlink(struct inode *, struct dentry *, const char *, int);
+extern int vfs_symlink(struct inode *, struct dentry *, const char *);
 extern int vfs_link(struct dentry *, struct inode *, struct dentry *);
 extern int vfs_rmdir(struct inode *, struct dentry *);
 extern int vfs_unlink(struct inode *, struct dentry *);
@@ -1272,7 +1275,7 @@ struct inode_operations {
        void * (*follow_link) (struct dentry *, struct nameidata *);
        void (*put_link) (struct dentry *, struct nameidata *, void *);
        void (*truncate) (struct inode *);
-        int (*permission) (struct inode *, int, struct nameidata *);
+        int (*permission) (struct inode *, int);
        int (*setattr) (struct dentry *, struct iattr *);
        int (*getattr) (struct vfsmount *mnt, struct dentry *, struct kstat *);
        int (*setxattr) (struct dentry *, const char *,const void *,size_t,int);
@@ -1696,9 +1699,9 @@ extern void init_special_inode(struct inode *, umode_t, dev_t);
 extern void make_bad_inode(struct inode *);
 extern int is_bad_inode(struct inode *);
-extern const struct file_operations read_fifo_fops;
+extern const struct file_operations read_pipefifo_fops;
-extern const struct file_operations write_fifo_fops;
+extern const struct file_operations write_pipefifo_fops;
-extern const struct file_operations rdwr_fifo_fops;
+extern const struct file_operations rdwr_pipefifo_fops;
 extern int fs_may_remount_ro(struct super_block *);
@@ -1767,7 +1770,7 @@ extern int do_remount_sb(struct super_block *sb, int flags,
 extern sector_t bmap(struct inode *, sector_t);
 #endif
 extern int notify_change(struct dentry *, struct iattr *);
-extern int permission(struct inode *, int, struct nameidata *);
+extern int inode_permission(struct inode *, int);
 extern int generic_permission(struct inode *, int,
                int (*check_acl)(struct inode *, int));
@@ -1831,7 +1834,7 @@ extern void clear_inode(struct inode *);
 extern void destroy_inode(struct inode *);
 extern struct inode *new_inode(struct super_block *);
 extern int should_remove_suid(struct dentry *);
-extern int remove_suid(struct dentry *);
+extern int file_remove_suid(struct file *);
 extern void __insert_inode_hash(struct inode *, unsigned long hashval);
 extern void remove_inode_hash(struct inode *);
diff --git a/include/linux/fs_struct.h b/include/linux/fs_struct.h
index 282f54219129..9e5a06e78d02 100644
--- a/include/linux/fs_struct.h
+++ b/include/linux/fs_struct.h
@@ -7,7 +7,7 @@ struct fs_struct {
        atomic_t count;
        rwlock_t lock;
        int umask;
-        struct path root, pwd, altroot;
+        struct path root, pwd;
 };
 #define INIT_FS {                               \
@@ -19,7 +19,6 @@ struct fs_struct {
 extern struct kmem_cache *fs_cachep;
 extern void exit_fs(struct task_struct *);
-extern void set_fs_altroot(void);
 extern void set_fs_root(struct fs_struct *, struct path *);
 extern void set_fs_pwd(struct fs_struct *, struct path *);
 extern struct fs_struct *copy_fs_struct(struct fs_struct *);
diff --git a/include/linux/mount.h b/include/linux/mount.h
index 4374d1adeb4b..b5efaa2132ab 100644
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -47,7 +47,7 @@ struct vfsmount {
        struct list_head mnt_child;     /* and going through their mnt_child */
        int mnt_flags;
        /* 4 bytes hole on 64bits arches */
-        char *mnt_devname;              /* Name of device e.g. /dev/dsk/hda1 */
+        const char *mnt_devname;        /* Name of device e.g. /dev/dsk/hda1 */
        struct list_head mnt_list;
        struct list_head mnt_expire;    /* link in fs-specific expiry list */
        struct list_head mnt_share;     /* circular list of shared mounts */
diff --git a/include/linux/namei.h b/include/linux/namei.h
index 24d88e98a626..68f8c3203c89 100644
--- a/include/linux/namei.h
+++ b/include/linux/namei.h
@@ -47,27 +47,24 @@ enum {LAST_NORM, LAST_ROOT, LAST_DOT, LAST_DOTDOT, LAST_BIND};
 #define LOOKUP_DIRECTORY         2
 #define LOOKUP_CONTINUE          4
 #define LOOKUP_PARENT           16
-#define LOOKUP_NOALT            32
 #define LOOKUP_REVAL            64
 /*
 * Intent data
 */
 #define LOOKUP_OPEN             (0x0100)
 #define LOOKUP_CREATE           (0x0200)
-#define LOOKUP_ACCESS           (0x0400)
-#define LOOKUP_CHDIR            (0x0800)
+extern int user_path_at(int, const char __user *, unsigned, struct path *);
-extern int __user_walk(const char __user *, unsigned, struct nameidata *);
+#define user_path(name, path) user_path_at(AT_FDCWD, name, LOOKUP_FOLLOW, path)
-extern int __user_walk_fd(int dfd, const char __user *, unsigned, struct nameidata *);
+#define user_lpath(name, path) user_path_at(AT_FDCWD, name, 0, path)
-#define user_path_walk(name,nd) \
+#define user_path_dir(name, path) \
-        __user_walk_fd(AT_FDCWD, name, LOOKUP_FOLLOW, nd)
+        user_path_at(AT_FDCWD, name, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, path)
-#define user_path_walk_link(name,nd) \
-        __user_walk_fd(AT_FDCWD, name, 0, nd)
 extern int path_lookup(const char *, unsigned, struct nameidata *);
 extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
                           const char *, unsigned int, struct nameidata *);
-extern int __user_path_lookup_open(const char __user *, unsigned lookup_flags, struct nameidata *nd, int open_flags);
 extern int path_lookup_open(int dfd, const char *name, unsigned lookup_flags, struct nameidata *, int open_flags);
 extern struct file *lookup_instantiate_filp(struct nameidata *nd, struct dentry *dentry,
                int (*open)(struct inode *, struct file *));
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 29d261918734..78a5922a2f11 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -42,7 +42,6 @@
 #include <linux/in.h>
 #include <linux/kref.h>
 #include <linux/mm.h>
-#include <linux/namei.h>
 #include <linux/pagemap.h>
 #include <linux/rbtree.h>
 #include <linux/rwsem.h>
@@ -332,7 +331,7 @@ extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *);
 extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr);
 extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr);
 extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
-extern int nfs_permission(struct inode *, int, struct nameidata *);
+extern int nfs_permission(struct inode *, int);
 extern int nfs_open(struct inode *, struct file *);
 extern int nfs_release(struct inode *, struct file *);
 extern int nfs_attribute_timeout(struct inode *inode);
diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
index f560d1705afe..fb61850d1cfc 100644
--- a/include/linux/proc_fs.h
+++ b/include/linux/proc_fs.h
@@ -282,11 +282,16 @@ union proc_op {
                struct task_struct *task);
 };
+struct ctl_table_header;
+struct ctl_table;
 struct proc_inode {
        struct pid *pid;
        int fd;
        union proc_op op;
        struct proc_dir_entry *pde;
+        struct ctl_table_header *sysctl;
+        struct ctl_table *sysctl_entry;
        struct inode vfs_inode;
 };
diff --git a/include/linux/reiserfs_xattr.h b/include/linux/reiserfs_xattr.h
index 66a96814d614..af135ae895db 100644
--- a/include/linux/reiserfs_xattr.h
+++ b/include/linux/reiserfs_xattr.h
@@ -55,7 +55,7 @@ int reiserfs_removexattr(struct dentry *dentry, const char *name);
 int reiserfs_delete_xattrs(struct inode *inode);
 int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs);
 int reiserfs_xattr_init(struct super_block *sb, int mount_flags);
-int reiserfs_permission(struct inode *inode, int mask, struct nameidata *nd);
+int reiserfs_permission(struct inode *inode, int mask);
 int reiserfs_xattr_del(struct inode *, const char *);
 int reiserfs_xattr_get(const struct inode *, const char *, void *, size_t);
diff --git a/include/linux/security.h b/include/linux/security.h
index f0e9adb22ac2..fd96e7f8a6f9 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -1362,7 +1362,7 @@ struct security_operations {
                             struct inode *new_dir, struct dentry *new_dentry);
        int (*inode_readlink) (struct dentry *dentry);
        int (*inode_follow_link) (struct dentry *dentry, struct nameidata *nd);
-        int (*inode_permission) (struct inode *inode, int mask, struct nameidata *nd);
+        int (*inode_permission) (struct inode *inode, int mask);
        int (*inode_setattr)    (struct dentry *dentry, struct iattr *attr);
        int (*inode_getattr) (struct vfsmount *mnt, struct dentry *dentry);
        void (*inode_delete) (struct inode *inode);
@@ -1628,7 +1628,7 @@ int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
                          struct inode *new_dir, struct dentry *new_dentry);
 int security_inode_readlink(struct dentry *dentry);
 int security_inode_follow_link(struct dentry *dentry, struct nameidata *nd);
-int security_inode_permission(struct inode *inode, int mask, struct nameidata *nd);
+int security_inode_permission(struct inode *inode, int mask);
 int security_inode_setattr(struct dentry *dentry, struct iattr *attr);
 int security_inode_getattr(struct vfsmount *mnt, struct dentry *dentry);
 void security_inode_delete(struct inode *inode);
@@ -2021,8 +2021,7 @@ static inline int security_inode_follow_link(struct dentry *dentry,
        return 0;
 }
-static inline int security_inode_permission(struct inode *inode, int mask,
+static inline int security_inode_permission(struct inode *inode, int mask)
-                                             struct nameidata *nd)
 {
        return 0;
 }
diff --git a/include/linux/shmem_fs.h b/include/linux/shmem_fs.h
index f2d12d5a21b8..fd83f2584b15 100644
--- a/include/linux/shmem_fs.h
+++ b/include/linux/shmem_fs.h
@@ -43,7 +43,7 @@ static inline struct shmem_inode_info *SHMEM_I(struct inode *inode)
 }
 #ifdef CONFIG_TMPFS_POSIX_ACL
-int shmem_permission(struct inode *, int, struct nameidata *);
+int shmem_permission(struct inode *, int);
 int shmem_acl_init(struct inode *, struct inode *);
 void shmem_acl_destroy_inode(struct inode *);
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index 24141b4d1a11..d0437f36921f 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -947,6 +947,22 @@ struct ctl_table;
 struct nsproxy;
 struct ctl_table_root;
+struct ctl_table_set {
+        struct list_head list;
+        struct ctl_table_set *parent;
+        int (*is_seen)(struct ctl_table_set *);
+};
+extern void setup_sysctl_set(struct ctl_table_set *p,
+        struct ctl_table_set *parent,
+        int (*is_seen)(struct ctl_table_set *));
+struct ctl_table_header;
+extern void sysctl_head_get(struct ctl_table_header *);
+extern void sysctl_head_put(struct ctl_table_header *);
+extern int sysctl_is_seen(struct ctl_table_header *);
+extern struct ctl_table_header *sysctl_head_grab(struct ctl_table_header *);
 extern struct ctl_table_header *sysctl_head_next(struct ctl_table_header *prev);
 extern struct ctl_table_header *__sysctl_head_next(struct nsproxy *namespaces,
                                                struct ctl_table_header *prev);
@@ -1049,8 +1065,8 @@ struct ctl_table
 struct ctl_table_root {
        struct list_head root_list;
-        struct list_head header_list;
+        struct ctl_table_set default_set;
-        struct list_head *(*lookup)(struct ctl_table_root *root,
+        struct ctl_table_set *(*lookup)(struct ctl_table_root *root,
                                           struct nsproxy *namespaces);
        int (*permissions)(struct ctl_table_root *root,
                        struct nsproxy *namespaces, struct ctl_table *table);
@@ -1063,9 +1079,14 @@ struct ctl_table_header
        struct ctl_table *ctl_table;
        struct list_head ctl_entry;
        int used;
+        int count;
        struct completion *unregistering;
        struct ctl_table *ctl_table_arg;
        struct ctl_table_root *root;
+        struct ctl_table_set *set;
+        struct ctl_table *attached_by;
+        struct ctl_table *attached_to;
+        struct ctl_table_header *parent;
 };
 /* struct ctl_path describes where in the hierarchy a table is added */
diff --git a/include/net/af_unix.h b/include/net/af_unix.h
index 2dfa96b0575e..7dd29b7e461d 100644
--- a/include/net/af_unix.h
+++ b/include/net/af_unix.h
@@ -51,7 +51,7 @@ struct unix_sock {
        struct sock             *peer;
        struct sock             *other;
        struct list_head        link;
-        atomic_t                inflight;
+        atomic_long_t           inflight;
        spinlock_t              lock;
        unsigned int            gc_candidate : 1;
        wait_queue_head_t       peer_wait;
diff --git a/include/net/ip.h b/include/net/ip.h
index b5862b975207..250e6ef025a4 100644
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -188,6 +188,8 @@ extern int sysctl_ip_dynaddr;
 extern void ipfrag_init(void);
+extern void ip_static_sysctl_init(void);
 #ifdef CONFIG_INET
 #include <net/dst.h>
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index 3855620b78a9..a8eb43cf0c7e 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -38,7 +38,9 @@ struct net {
        struct proc_dir_entry   *proc_net;
        struct proc_dir_entry   *proc_net_stat;
-        struct list_head        sysctl_table_headers;
+#ifdef CONFIG_SYSCTL
+        struct ctl_table_set    sysctls;
+#endif
        struct net_device       *loopback_dev;          /* The loopback */
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 474984f9e032..96fb36cd9874 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -638,7 +638,7 @@ static int oflag2acc[O_ACCMODE] = { MAY_READ, MAY_WRITE,
                return ERR_PTR(-EINVAL);
        }
-        if (permission(dentry->d_inode, oflag2acc[oflag & O_ACCMODE], NULL)) {
+        if (inode_permission(dentry->d_inode, oflag2acc[oflag & O_ACCMODE])) {
                dput(dentry);
                mntput(mqueue_mnt);
                return ERR_PTR(-EACCES);
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 89bd6fb7894f..657f8f8d93a5 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -45,6 +45,7 @@
 #include <linux/delayacct.h>
 #include <linux/cgroupstats.h>
 #include <linux/hash.h>
+#include <linux/namei.h>
 #include <asm/atomic.h>
diff --git a/kernel/exec_domain.c b/kernel/exec_domain.c
index c1ef192aa655..0d407e886735 100644
--- a/kernel/exec_domain.c
+++ b/kernel/exec_domain.c
@@ -168,7 +168,6 @@ __set_personality(u_long personality)
        current->personality = personality;
        oep = current_thread_info()->exec_domain;
        current_thread_info()->exec_domain = ep;
-        set_fs_altroot();
        module_put(oep->module);
        return 0;
diff --git a/kernel/exit.c b/kernel/exit.c
index 6cdf60712bd2..0caf590548a0 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -565,8 +565,6 @@ void put_fs_struct(struct fs_struct *fs)
        if (atomic_dec_and_test(&fs->count)) {
                path_put(&fs->root);
                path_put(&fs->pwd);
-                if (fs->altroot.dentry)
-                        path_put(&fs->altroot);
                kmem_cache_free(fs_cachep, fs);
        }
 }
diff --git a/kernel/fork.c b/kernel/fork.c
index abb3ed6298f6..5e050c1317c4 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -657,13 +657,6 @@ static struct fs_struct *__copy_fs_struct(struct fs_struct *old)
                path_get(&old->root);
                fs->pwd = old->pwd;
                path_get(&old->pwd);
-                if (old->altroot.dentry) {
-                        fs->altroot = old->altroot;
-                        path_get(&old->altroot);
-                } else {
-                        fs->altroot.mnt = NULL;
-                        fs->altroot.dentry = NULL;
-                }
                read_unlock(&old->lock);
        }
        return fs;
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 35a50db9b6ce..911d846f0503 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -160,12 +160,13 @@ static struct ctl_table root_table[];
 static struct ctl_table_root sysctl_table_root;
 static struct ctl_table_header root_table_header = {
        .ctl_table = root_table,
-        .ctl_entry = LIST_HEAD_INIT(sysctl_table_root.header_list),
+        .ctl_entry = LIST_HEAD_INIT(sysctl_table_root.default_set.list),
        .root = &sysctl_table_root,
+        .set = &sysctl_table_root.default_set,
 };
 static struct ctl_table_root sysctl_table_root = {
        .root_list = LIST_HEAD_INIT(sysctl_table_root.root_list),
-        .header_list = LIST_HEAD_INIT(root_table_header.ctl_entry),
+        .default_set.list = LIST_HEAD_INIT(root_table_header.ctl_entry),
 };
 static struct ctl_table kern_table[];
@@ -1386,6 +1387,9 @@ static void start_unregistering(struct ctl_table_header *p)
                spin_unlock(&sysctl_lock);
                wait_for_completion(&wait);
                spin_lock(&sysctl_lock);
+        } else {
+                /* anything non-NULL; we'll never dereference it */
+                p->unregistering = ERR_PTR(-EINVAL);
        }
        /*
         * do not remove from the list until nobody holds it; walking the
@@ -1394,6 +1398,32 @@ static void start_unregistering(struct ctl_table_header *p)
        list_del_init(&p->ctl_entry);
 }
+void sysctl_head_get(struct ctl_table_header *head)
+{
+        spin_lock(&sysctl_lock);
+        head->count++;
+        spin_unlock(&sysctl_lock);
+}
+void sysctl_head_put(struct ctl_table_header *head)
+{
+        spin_lock(&sysctl_lock);
+        if (!--head->count)
+                kfree(head);
+        spin_unlock(&sysctl_lock);
+}
+struct ctl_table_header *sysctl_head_grab(struct ctl_table_header *head)
+{
+        if (!head)
+                BUG();
+        spin_lock(&sysctl_lock);
+        if (!use_table(head))
+                head = ERR_PTR(-ENOENT);
+        spin_unlock(&sysctl_lock);
+        return head;
+}
 void sysctl_head_finish(struct ctl_table_header *head)
 {
        if (!head)
@@ -1403,14 +1433,20 @@ void sysctl_head_finish(struct ctl_table_header *head)
        spin_unlock(&sysctl_lock);
 }
+static struct ctl_table_set *
+lookup_header_set(struct ctl_table_root *root, struct nsproxy *namespaces)
+{
+        struct ctl_table_set *set = &root->default_set;
+        if (root->lookup)
+                set = root->lookup(root, namespaces);
+        return set;
+}
 static struct list_head *
 lookup_header_list(struct ctl_table_root *root, struct nsproxy *namespaces)
 {
-        struct list_head *header_list;
+        struct ctl_table_set *set = lookup_header_set(root, namespaces);
-        header_list = &root->header_list;
+        return &set->list;
-        if (root->lookup)
-                header_list = root->lookup(root, namespaces);
-        return header_list;
 }
 struct ctl_table_header *__sysctl_head_next(struct nsproxy *namespaces,
@@ -1480,9 +1516,9 @@ static int do_sysctl_strategy(struct ctl_table_root *root,
        int op = 0, rc;
        if (oldval)
-                op |= 004;
+                op |= MAY_READ;
        if (newval)
-                op |= 002;
+                op |= MAY_WRITE;
        if (sysctl_perm(root, table, op))
                return -EPERM;
@@ -1524,7 +1560,7 @@ repeat:
                if (n == table->ctl_name) {
                        int error;
                        if (table->child) {
-                                if (sysctl_perm(root, table, 001))
+                                if (sysctl_perm(root, table, MAY_EXEC))
                                        return -EPERM;
                                name++;
                                nlen--;
@@ -1599,7 +1635,7 @@ static int test_perm(int mode, int op)
                mode >>= 6;
        else if (in_egroup_p(0))
                mode >>= 3;
-        if ((mode & op & 0007) == op)
+        if ((op & ~mode & (MAY_READ|MAY_WRITE|MAY_EXEC)) == 0)
                return 0;
        return -EACCES;
 }
@@ -1609,7 +1645,7 @@ int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int op)
        int error;
        int mode;
-        error = security_sysctl(table, op);
+        error = security_sysctl(table, op & (MAY_READ | MAY_WRITE | MAY_EXEC));
        if (error)
                return error;
@@ -1644,6 +1680,52 @@ static __init int sysctl_init(void)
 core_initcall(sysctl_init);
+static int is_branch_in(struct ctl_table *branch, struct ctl_table *table)
+{
+        struct ctl_table *p;
+        const char *s = branch->procname;
+        /* branch should have named subdirectory as its first element */
+        if (!s || !branch->child)
+                return 0;
+        /* ... and nothing else */
+        if (branch[1].procname || branch[1].ctl_name)
+                return 0;
+        /* table should contain subdirectory with the same name */
+        for (p = table; p->procname || p->ctl_name; p++) {
+                if (!p->child)
+                        continue;
+                if (p->procname && strcmp(p->procname, s) == 0)
+                        return 1;
+        }
+        return 0;
+}
+/* see if attaching q to p would be an improvement */
+static void try_attach(struct ctl_table_header *p, struct ctl_table_header *q)
+{
+        struct ctl_table *to = p->ctl_table, *by = q->ctl_table;
+        int is_better = 0;
+        int not_in_parent = !p->attached_by;
+        while (is_branch_in(by, to)) {
+                if (by == q->attached_by)
+                        is_better = 1;
+                if (to == p->attached_by)
+                        not_in_parent = 1;
+                by = by->child;
+                to = to->child;
+        }
+        if (is_better && not_in_parent) {
+                q->attached_by = by;
+                q->attached_to = to;
+                q->parent = p;
+        }
+}
 /**
 * __register_sysctl_paths - register a sysctl hierarchy
 * @root: List of sysctl headers to register on
@@ -1720,10 +1802,10 @@ struct ctl_table_header *__register_sysctl_paths(
        struct nsproxy *namespaces,
        const struct ctl_path *path, struct ctl_table *table)
 {
-        struct list_head *header_list;
        struct ctl_table_header *header;
        struct ctl_table *new, **prevp;
        unsigned int n, npath;
+        struct ctl_table_set *set;
        /* Count the path components */
        for (npath = 0; path[npath].ctl_name || path[npath].procname; ++npath)
@@ -1765,6 +1847,7 @@ struct ctl_table_header *__register_sysctl_paths(
        header->unregistering = NULL;
        header->root = root;
        sysctl_set_parent(NULL, header->ctl_table);
+        header->count = 1;
 #ifdef CONFIG_SYSCTL_SYSCALL_CHECK
        if (sysctl_check_table(namespaces, header->ctl_table)) {
                kfree(header);
@@ -1772,8 +1855,20 @@ struct ctl_table_header *__register_sysctl_paths(
        }
 #endif
        spin_lock(&sysctl_lock);
-        header_list = lookup_header_list(root, namespaces);
+        header->set = lookup_header_set(root, namespaces);
-        list_add_tail(&header->ctl_entry, header_list);
+        header->attached_by = header->ctl_table;
+        header->attached_to = root_table;
+        header->parent = &root_table_header;
+        for (set = header->set; set; set = set->parent) {
+                struct ctl_table_header *p;
+                list_for_each_entry(p, &set->list, ctl_entry) {
+                        if (p->unregistering)
+                                continue;
+                        try_attach(p, header);
+                }
+        }
+        header->parent->count++;
+        list_add_tail(&header->ctl_entry, &header->set->list);
        spin_unlock(&sysctl_lock);
        return header;
@@ -1828,8 +1923,37 @@ void unregister_sysctl_table(struct ctl_table_header * header)
        spin_lock(&sysctl_lock);
        start_unregistering(header);
+        if (!--header->parent->count) {
+                WARN_ON(1);
+                kfree(header->parent);
+        }
+        if (!--header->count)
+                kfree(header);
        spin_unlock(&sysctl_lock);
-        kfree(header);
+}
+int sysctl_is_seen(struct ctl_table_header *p)
+{
+        struct ctl_table_set *set = p->set;
+        int res;
+        spin_lock(&sysctl_lock);
+        if (p->unregistering)
+                res = 0;
+        else if (!set->is_seen)
+                res = 1;
+        else
+                res = set->is_seen(set);
+        spin_unlock(&sysctl_lock);
+        return res;
+}
+void setup_sysctl_set(struct ctl_table_set *p,
+        struct ctl_table_set *parent,
+        int (*is_seen)(struct ctl_table_set *))
+{
+        INIT_LIST_HEAD(&p->list);
+        p->parent = parent ? parent : &sysctl_table_root.default_set;
+        p->is_seen = is_seen;
 }
 #else /* !CONFIG_SYSCTL */
@@ -1848,6 +1972,16 @@ void unregister_sysctl_table(struct ctl_table_header * table)
 {
 }
+void setup_sysctl_set(struct ctl_table_set *p,
+        struct ctl_table_set *parent,
+        int (*is_seen)(struct ctl_table_set *))
+{
+}
+void sysctl_head_put(struct ctl_table_header *head)
+{
+}
 #endif /* CONFIG_SYSCTL */
 /*
diff --git a/mm/filemap.c b/mm/filemap.c
index 2ed8b0389c51..5de7633e1dbe 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1758,8 +1758,9 @@ static int __remove_suid(struct dentry *dentry, int kill)
        return notify_change(dentry, &newattrs);
 }
-int remove_suid(struct dentry *dentry)
+int file_remove_suid(struct file *file)
 {
+        struct dentry *dentry = file->f_path.dentry;
        int killsuid = should_remove_suid(dentry);
        int killpriv = security_inode_need_killpriv(dentry);
        int error = 0;
@@ -1773,7 +1774,7 @@ int remove_suid(struct dentry *dentry)
        return error;
 }
-EXPORT_SYMBOL(remove_suid);
+EXPORT_SYMBOL(file_remove_suid);
 static size_t __iovec_copy_from_user_inatomic(char *vaddr,
                        const struct iovec *iov, size_t base, size_t bytes)
@@ -2529,7 +2530,7 @@ __generic_file_aio_write_nolock(struct kiocb *iocb, const struct iovec *iov,
        if (count == 0)
                goto out;
-        err = remove_suid(file->f_path.dentry);
+        err = file_remove_suid(file);
        if (err)
                goto out;
diff --git a/mm/filemap_xip.c b/mm/filemap_xip.c
index 3e744abcce9d..98a3f31ccd6a 100644
--- a/mm/filemap_xip.c
+++ b/mm/filemap_xip.c
@@ -380,7 +380,7 @@ xip_file_write(struct file *filp, const char __user *buf, size_t len,
        if (count == 0)
                goto out_backing;
-        ret = remove_suid(filp->f_path.dentry);
+        ret = file_remove_suid(filp);
        if (ret)
                goto out_backing;
diff --git a/mm/shmem_acl.c b/mm/shmem_acl.c
index f5664c5b9eb1..8e5aadd7dcd6 100644
--- a/mm/shmem_acl.c
+++ b/mm/shmem_acl.c
@@ -191,7 +191,7 @@ shmem_check_acl(struct inode *inode, int mask)
 * shmem_permission  -  permission() inode operation
 */
 int
-shmem_permission(struct inode *inode, int mask, struct nameidata *nd)
+shmem_permission(struct inode *inode, int mask)
 {
        return generic_permission(inode, mask, shmem_check_acl);
 }
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index d9f15ddac316..8a3ac1fa71a9 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1439,6 +1439,10 @@ static int __init inet_init(void)
        (void)sock_register(&inet_family_ops);
+#ifdef CONFIG_SYSCTL
+        ip_static_sysctl_init();
+#endif
        /*
         *      Add all the base protocols.
         */
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 14ef202a2254..d63e9388d92d 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -882,4 +882,11 @@ static __init int sysctl_ipv4_init(void)
        return 0;
 }
+/* set enough of tree skeleton to get rid of ordering problems */
+void __init ip_static_sysctl_init(void)
+{
+        static ctl_table table[1];
+        register_sysctl_paths(net_ipv4_ctl_path, table);
+}
 __initcall(sysctl_ipv4_init);
diff --git a/net/sched/sch_atm.c b/net/sched/sch_atm.c
index 04faa835be17..6b517b9dac5b 100644
--- a/net/sched/sch_atm.c
+++ b/net/sched/sch_atm.c
@@ -162,7 +162,7 @@ static void atm_tc_put(struct Qdisc *sch, unsigned long cl)
        qdisc_destroy(flow->q);
        tcf_destroy_chain(&flow->filter_list);
        if (flow->sock) {
-                pr_debug("atm_tc_put: f_count %d\n",
+                pr_debug("atm_tc_put: f_count %ld\n",
                        file_count(flow->sock->file));
                flow->vcc->pop = flow->old_pop;
                sockfd_put(flow->sock);
@@ -259,7 +259,7 @@ static int atm_tc_change(struct Qdisc *sch, u32 classid, u32 parent,
        sock = sockfd_lookup(fd, &error);
        if (!sock)
                return error;   /* f_count++ */
-        pr_debug("atm_tc_change: f_count %d\n", file_count(sock->file));
+        pr_debug("atm_tc_change: f_count %ld\n", file_count(sock->file));
        if (sock->ops->family != PF_ATMSVC && sock->ops->family != PF_ATMPVC) {
                error = -EPROTOTYPE;
                goto err_out;
diff --git a/net/sysctl_net.c b/net/sysctl_net.c
index 63ada437fc2f..cefbc367d8be 100644
--- a/net/sysctl_net.c
+++ b/net/sysctl_net.c
@@ -29,10 +29,15 @@
 #include <linux/if_tr.h>
 #endif
-static struct list_head *
+static struct ctl_table_set *
 net_ctl_header_lookup(struct ctl_table_root *root, struct nsproxy *namespaces)
 {
-        return &namespaces->net_ns->sysctl_table_headers;
+        return &namespaces->net_ns->sysctls;
+}
+static int is_seen(struct ctl_table_set *set)
+{
+        return &current->nsproxy->net_ns->sysctls == set;
 }
 /* Return standard mode bits for table entry. */
@@ -53,13 +58,6 @@ static struct ctl_table_root net_sysctl_root = {
        .permissions = net_ctl_permissions,
 };
-static LIST_HEAD(net_sysctl_ro_tables);
-static struct list_head *net_ctl_ro_header_lookup(struct ctl_table_root *root,
-                struct nsproxy *namespaces)
-{
-        return &net_sysctl_ro_tables;
-}
 static int net_ctl_ro_header_perms(struct ctl_table_root *root,
                struct nsproxy *namespaces, struct ctl_table *table)
 {
@@ -70,19 +68,18 @@ static int net_ctl_ro_header_perms(struct ctl_table_root *root,
 }
 static struct ctl_table_root net_sysctl_ro_root = {
-        .lookup = net_ctl_ro_header_lookup,
        .permissions = net_ctl_ro_header_perms,
 };
 static int sysctl_net_init(struct net *net)
 {
-        INIT_LIST_HEAD(&net->sysctl_table_headers);
+        setup_sysctl_set(&net->sysctls, NULL, is_seen);
        return 0;
 }
 static void sysctl_net_exit(struct net *net)
 {
-        WARN_ON(!list_empty(&net->sysctl_table_headers));
+        WARN_ON(!list_empty(&net->sysctls.list));
        return;
 }
@@ -98,6 +95,7 @@ static __init int sysctl_init(void)
        if (ret)
                goto out;
        register_sysctl_root(&net_sysctl_root);
+        setup_sysctl_set(&net_sysctl_ro_root.default_set, NULL, NULL);
        register_sysctl_root(&net_sysctl_ro_root);
 out:
        return ret;
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 24eb214581d5..015606b54d9b 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -603,7 +603,7 @@ static struct sock * unix_create1(struct net *net, struct socket *sock)
        u->dentry = NULL;
        u->mnt    = NULL;
        spin_lock_init(&u->lock);
-        atomic_set(&u->inflight, 0);
+        atomic_long_set(&u->inflight, 0);
        INIT_LIST_HEAD(&u->link);
        mutex_init(&u->readlock); /* single task reading lock */
        init_waitqueue_head(&u->peer_wait);
diff --git a/net/unix/garbage.c b/net/unix/garbage.c
index ebdff3d877a1..2a27b84f740b 100644
--- a/net/unix/garbage.c
+++ b/net/unix/garbage.c
@@ -127,7 +127,7 @@ void unix_inflight(struct file *fp)
        if(s) {
                struct unix_sock *u = unix_sk(s);
                spin_lock(&unix_gc_lock);
-                if (atomic_inc_return(&u->inflight) == 1) {
+                if (atomic_long_inc_return(&u->inflight) == 1) {
                        BUG_ON(!list_empty(&u->link));
                        list_add_tail(&u->link, &gc_inflight_list);
                } else {
@@ -145,7 +145,7 @@ void unix_notinflight(struct file *fp)
                struct unix_sock *u = unix_sk(s);
                spin_lock(&unix_gc_lock);
                BUG_ON(list_empty(&u->link));
-                if (atomic_dec_and_test(&u->inflight))
+                if (atomic_long_dec_and_test(&u->inflight))
                        list_del_init(&u->link);
                unix_tot_inflight--;
                spin_unlock(&unix_gc_lock);
@@ -237,17 +237,17 @@ static void scan_children(struct sock *x, void (*func)(struct unix_sock *),
 static void dec_inflight(struct unix_sock *usk)
 {
-        atomic_dec(&usk->inflight);
+        atomic_long_dec(&usk->inflight);
 }
 static void inc_inflight(struct unix_sock *usk)
 {
-        atomic_inc(&usk->inflight);
+        atomic_long_inc(&usk->inflight);
 }
 static void inc_inflight_move_tail(struct unix_sock *u)
 {
-        atomic_inc(&u->inflight);
+        atomic_long_inc(&u->inflight);
        /*
         * If this is still a candidate, move it to the end of the
         * list, so that it's checked even if it was already passed
@@ -288,11 +288,11 @@ void unix_gc(void)
         * before the detach without atomicity guarantees.
         */
        list_for_each_entry_safe(u, next, &gc_inflight_list, link) {
-                int total_refs;
+                long total_refs;
-                int inflight_refs;
+                long inflight_refs;
                total_refs = file_count(u->sk.sk_socket->file);
-                inflight_refs = atomic_read(&u->inflight);
+                inflight_refs = atomic_long_read(&u->inflight);
                BUG_ON(inflight_refs < 1);
                BUG_ON(total_refs < inflight_refs);
@@ -324,7 +324,7 @@ void unix_gc(void)
                /* Move cursor to after the current position. */
                list_move(&cursor, &u->link);
-                if (atomic_read(&u->inflight) > 0) {
+                if (atomic_long_read(&u->inflight) > 0) {
                        list_move_tail(&u->link, &gc_inflight_list);
                        u->gc_candidate = 0;
                        scan_children(&u->sk, inc_inflight_move_tail, NULL);
diff --git a/security/capability.c b/security/capability.c
index 5b01c0b02422..63d10da515a5 100644
--- a/security/capability.c
+++ b/security/capability.c
@@ -211,8 +211,7 @@ static int cap_inode_follow_link(struct dentry *dentry,
        return 0;
 }
-static int cap_inode_permission(struct inode *inode, int mask,
+static int cap_inode_permission(struct inode *inode, int mask)
-                                struct nameidata *nd)
 {
        return 0;
 }
diff --git a/security/security.c b/security/security.c
index 59f23b5918b3..ff7068727757 100644
--- a/security/security.c
+++ b/security/security.c
@@ -429,11 +429,11 @@ int security_inode_follow_link(struct dentry *dentry, struct nameidata *nd)
        return security_ops->inode_follow_link(dentry, nd);
 }
-int security_inode_permission(struct inode *inode, int mask, struct nameidata *nd)
+int security_inode_permission(struct inode *inode, int mask)
 {
        if (unlikely(IS_PRIVATE(inode)))
                return 0;
-        return security_ops->inode_permission(inode, mask, nd);
+        return security_ops->inode_permission(inode, mask);
 }
 int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
@@ -442,6 +442,7 @@ int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
                return 0;
        return security_ops->inode_setattr(dentry, attr);
 }
+EXPORT_SYMBOL_GPL(security_inode_setattr);
 int security_inode_getattr(struct vfsmount *mnt, struct dentry *dentry)
 {
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index da36dac6535f..40d06c533f89 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2624,12 +2624,11 @@ static int selinux_inode_follow_link(struct dentry *dentry, struct nameidata *na
        return dentry_has_perm(current, NULL, dentry, FILE__READ);
 }
-static int selinux_inode_permission(struct inode *inode, int mask,
+static int selinux_inode_permission(struct inode *inode, int mask)
-                                    struct nameidata *nd)
 {
        int rc;
-        rc = secondary_ops->inode_permission(inode, mask, nd);
+        rc = secondary_ops->inode_permission(inode, mask);
        if (rc)
                return rc;
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index ee5a51cbc5eb..1b40e558f983 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -522,8 +522,7 @@ static int smack_inode_rename(struct inode *old_inode,
 *
 * Returns 0 if access is permitted, -EACCES otherwise
 */
-static int smack_inode_permission(struct inode *inode, int mask,
+static int smack_inode_permission(struct inode *inode, int mask)
-                                  struct nameidata *nd)
 {
        /*
         * No permission to check. Existence test. Yup, it's there.
author	Linus Torvalds <torvalds@linux-foundation.org>	2008-07-26 23:23:44 -0400
committer	Linus Torvalds <torvalds@linux-foundation.org>	2008-07-26 23:23:44 -0400
commit	4836e3007882984279ca63d3c42bf0b14616eb78 (patch)
tree	28bf22726964e068b825491d71a141eefedbe5f8
parent	5c7c204aeca51ccfad63caab4fcdc5d8026c0fd8 (diff)
parent	4e1e018ecc6f7bfd10fc75b3ff9715cc8164e0a2 (diff)