[PATCH] assorted path_lookup() -> kern_path() conversions

more nameidata eviction

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

4 files changed, 34 insertions, 37 deletions

diff --git a/fs/block_dev.c b/fs/block_dev.c
index 218408eed1bb..d06fe3c3dd3f 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1268,33 +1268,33 @@ EXPORT_SYMBOL(ioctl_by_bdev);
  * namespace if possible and return it.  Return ERR_PTR(error)
  * otherwise.
  */
-struct block_device *lookup_bdev(const char *path)
+struct block_device *lookup_bdev(const char *pathname)
 {
         struct block_device *bdev;
         struct inode *inode;
-        struct nameidata nd;
+        struct path path;
         int error;
 
-        if (!path || !*path)
+        if (!pathname || !*pathname)
                 return ERR_PTR(-EINVAL);
 
-        error = path_lookup(path, LOOKUP_FOLLOW, &nd);
+        error = kern_path(pathname, LOOKUP_FOLLOW, &path);
         if (error)
                 return ERR_PTR(error);
 
-        inode = nd.path.dentry->d_inode;
+        inode = path.dentry->d_inode;
         error = -ENOTBLK;
         if (!S_ISBLK(inode->i_mode))
                 goto fail;
         error = -EACCES;
-        if (nd.path.mnt->mnt_flags & MNT_NODEV)
+        if (path.mnt->mnt_flags & MNT_NODEV)
                 goto fail;
         error = -ENOMEM;
         bdev = bd_acquire(inode);
         if (!bdev)
                 goto fail;
 out:
-        path_put(&nd.path);
+        path_put(&path);
         return bdev;
 fail:
         bdev = ERR_PTR(error);
diff --git a/fs/configfs/symlink.c b/fs/configfs/symlink.c
index bf74973b0492..932a92b31483 100644
--- a/fs/configfs/symlink.c
+++ b/fs/configfs/symlink.c
@@ -108,18 +108,18 @@ out:
 }
 
 
-static int get_target(const char *symname, struct nameidata *nd,
+static int get_target(const char *symname, struct path *path,
                       struct config_item **target)
 {
         int ret;
 
-        ret = path_lookup(symname, LOOKUP_FOLLOW|LOOKUP_DIRECTORY, nd);
+        ret = kern_path(symname, LOOKUP_FOLLOW|LOOKUP_DIRECTORY, path);
         if (!ret) {
-                if (nd->path.dentry->d_sb == configfs_sb) {
-                        *target = configfs_get_config_item(nd->path.dentry);
+                if (path->dentry->d_sb == configfs_sb) {
+                        *target = configfs_get_config_item(path->dentry);
                         if (!*target) {
                                 ret = -ENOENT;
-                                path_put(&nd->path);
+                                path_put(path);
                         }
                 } else
                         ret = -EPERM;
@@ -132,7 +132,7 @@ static int get_target(const char *symname, struct nameidata *nd,
 int configfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
 {
         int ret;
-        struct nameidata nd;
+        struct path path;
         struct configfs_dirent *sd;
         struct config_item *parent_item;
         struct config_item *target_item;
@@ -159,7 +159,7 @@ int configfs_symlink(struct inode *dir, struct dentry *dentry, const char *symna
             !type->ct_item_ops->allow_link)
                 goto out_put;
 
-        ret = get_target(symname, &nd, &target_item);
+        ret = get_target(symname, &path, &target_item);
         if (ret)
                 goto out_put;
 
@@ -174,7 +174,7 @@ int configfs_symlink(struct inode *dir, struct dentry *dentry, const char *symna
         }
 
         config_item_put(target_item);
-        path_put(&nd.path);
+        path_put(&path);
 
 out_put:
         config_item_put(parent_item);
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index 046e027a4cb1..64d2ba980df4 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -471,31 +471,26 @@ out:
  */
 static int ecryptfs_read_super(struct super_block *sb, const char *dev_name)
 {
+        struct path path;
         int rc;
-        struct nameidata nd;
-        struct dentry *lower_root;
-        struct vfsmount *lower_mnt;
 
-        memset(&nd, 0, sizeof(struct nameidata));
-        rc = path_lookup(dev_name, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &nd);
+        rc = kern_path(dev_name, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &path);
         if (rc) {
                 ecryptfs_printk(KERN_WARNING, "path_lookup() failed\n");
                 goto out;
         }
-        lower_root = nd.path.dentry;
-        lower_mnt = nd.path.mnt;
-        ecryptfs_set_superblock_lower(sb, lower_root->d_sb);
-        sb->s_maxbytes = lower_root->d_sb->s_maxbytes;
-        sb->s_blocksize = lower_root->d_sb->s_blocksize;
-        ecryptfs_set_dentry_lower(sb->s_root, lower_root);
-        ecryptfs_set_dentry_lower_mnt(sb->s_root, lower_mnt);
-        rc = ecryptfs_interpose(lower_root, sb->s_root, sb, 0);
+        ecryptfs_set_superblock_lower(sb, path.dentry->d_sb);
+        sb->s_maxbytes = path.dentry->d_sb->s_maxbytes;
+        sb->s_blocksize = path.dentry->d_sb->s_blocksize;
+        ecryptfs_set_dentry_lower(sb->s_root, path.dentry);
+        ecryptfs_set_dentry_lower_mnt(sb->s_root, path.mnt);
+        rc = ecryptfs_interpose(path.dentry, sb->s_root, sb, 0);
         if (rc)
                 goto out_free;
         rc = 0;
         goto out;
 out_free:
-        path_put(&nd.path);
+        path_put(&path);
 out:
         return rc;
 }
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index c647aab8d418..dc504d308ec0 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -711,28 +711,30 @@ static struct sock *unix_find_other(struct net *net,
                                     int type, unsigned hash, int *error)
 {
         struct sock *u;
-        struct nameidata nd;
+        struct path path;
         int err = 0;
 
         if (sunname->sun_path[0]) {
-                err = path_lookup(sunname->sun_path, LOOKUP_FOLLOW, &nd);
+                struct inode *inode;
+                err = kern_path(sunname->sun_path, LOOKUP_FOLLOW, &path);
                 if (err)
                         goto fail;
-                err = vfs_permission(&nd, MAY_WRITE);
+                inode = path.dentry->d_inode;
+                err = inode_permission(inode, MAY_WRITE);
                 if (err)
                         goto put_fail;
 
                 err = -ECONNREFUSED;
-                if (!S_ISSOCK(nd.path.dentry->d_inode->i_mode))
+                if (!S_ISSOCK(inode->i_mode))
                         goto put_fail;
-                u = unix_find_socket_byinode(net, nd.path.dentry->d_inode);
+                u = unix_find_socket_byinode(net, inode);
                 if (!u)
                         goto put_fail;
 
                 if (u->sk_type == type)
-                        touch_atime(nd.path.mnt, nd.path.dentry);
+                        touch_atime(path.mnt, path.dentry);
 
-                path_put(&nd.path);
+                path_put(&path);
 
                 err=-EPROTOTYPE;
                 if (u->sk_type != type) {
@@ -753,7 +755,7 @@ static struct sock *unix_find_other(struct net *net,
         return u;
 
 put_fail:
-        path_put(&nd.path);
+        path_put(&path);
 fail:
         *error=err;
         return NULL;