7 files changed, 95 insertions, 189 deletions

diff --git a/fs/coda/dir.c b/fs/coda/dir.c
index 69fbbea75f1b..96fbeab77f2f 100644
--- a/fs/coda/dir.c
+++ b/fs/coda/dir.c
@@ -17,7 +17,6 @@
 #include <linux/stat.h>
 #include <linux/errno.h>
 #include <linux/string.h>
-#include <linux/smp_lock.h>
 #include <linux/spinlock.h>
 
 #include <asm/uaccess.h>
@@ -117,15 +116,11 @@ static struct dentry *coda_lookup(struct inode *dir, struct dentry *entry, struc
                 goto exit;
         }
 
-        lock_kernel();
-
         error = venus_lookup(dir->i_sb, coda_i2f(dir), name, length,
                              &type, &resfid);
         if (!error)
                 error = coda_cnode_make(&inode, &resfid, dir->i_sb);
 
-        unlock_kernel();
-
         if (error && error != -ENOENT)
                 return ERR_PTR(error);
 
@@ -141,28 +136,24 @@ exit:
 
 int coda_permission(struct inode *inode, int mask)
 {
-        int error = 0;
+        int error;
 
         mask &= MAY_READ | MAY_WRITE | MAY_EXEC;
  
         if (!mask)
-                return 0; 
+                return 0;
 
         if ((mask & MAY_EXEC) && !execute_ok(inode))
                 return -EACCES;
 
-        lock_kernel();
-
         if (coda_cache_check(inode, mask))
-                goto out; 
+                return 0;
 
-        error = venus_access(inode->i_sb, coda_i2f(inode), mask);
+        error = venus_access(inode->i_sb, coda_i2f(inode), mask);
     
         if (!error)
                 coda_cache_enter(inode, mask);
 
- out:
-        unlock_kernel();
         return error;
 }
 
@@ -201,41 +192,34 @@ static inline void coda_dir_drop_nlink(struct inode *dir)
 /* creation routines: create, mknod, mkdir, link, symlink */
 static int coda_create(struct inode *dir, struct dentry *de, int mode, struct nameidata *nd)
 {
-        int error=0;
+        int error;
         const char *name=de->d_name.name;
         int length=de->d_name.len;
         struct inode *inode;
         struct CodaFid newfid;
         struct coda_vattr attrs;
 
-        lock_kernel();
-
-        if (coda_isroot(dir) && coda_iscontrol(name, length)) {
-                unlock_kernel();
+        if (coda_isroot(dir) && coda_iscontrol(name, length))
                 return -EPERM;
-        }
 
         error = venus_create(dir->i_sb, coda_i2f(dir), name, length, 
                                 0, mode, &newfid, &attrs);
-
-        if ( error ) {
-                unlock_kernel();
-                d_drop(de);
-                return error;
-        }
+        if (error)
+                goto err_out;
 
         inode = coda_iget(dir->i_sb, &newfid, &attrs);
-        if ( IS_ERR(inode) ) {
-                unlock_kernel();
-                d_drop(de);
-                return PTR_ERR(inode);
+        if (IS_ERR(inode)) {
+                error = PTR_ERR(inode);
+                goto err_out;
         }
 
         /* invalidate the directory cnode's attributes */
         coda_dir_update_mtime(dir);
-        unlock_kernel();
         d_instantiate(de, inode);
         return 0;
+err_out:
+        d_drop(de);
+        return error;
 }
 
 static int coda_mkdir(struct inode *dir, struct dentry *de, int mode)
@@ -247,36 +231,29 @@ static int coda_mkdir(struct inode *dir, struct dentry *de, int mode)
         int error;
         struct CodaFid newfid;
 
-        lock_kernel();
-
-        if (coda_isroot(dir) && coda_iscontrol(name, len)) {
-                unlock_kernel();
+        if (coda_isroot(dir) && coda_iscontrol(name, len))
                 return -EPERM;
-        }
 
         attrs.va_mode = mode;
         error = venus_mkdir(dir->i_sb, coda_i2f(dir), 
                                name, len, &newfid, &attrs);
-        
-        if ( error ) {
-                unlock_kernel();
-                d_drop(de);
-                return error;
-        }
+        if (error)
+                goto err_out;
          
         inode = coda_iget(dir->i_sb, &newfid, &attrs);
-        if ( IS_ERR(inode) ) {
-                unlock_kernel();
-                d_drop(de);
-                return PTR_ERR(inode);
+        if (IS_ERR(inode)) {
+                error = PTR_ERR(inode);
+                goto err_out;
         }
 
         /* invalidate the directory cnode's attributes */
         coda_dir_inc_nlink(dir);
         coda_dir_update_mtime(dir);
-        unlock_kernel();
         d_instantiate(de, inode);
         return 0;
+err_out:
+        d_drop(de);
+        return error;
 }
 
 /* try to make de an entry in dir_inodde linked to source_de */ 
@@ -288,52 +265,38 @@ static int coda_link(struct dentry *source_de, struct inode *dir_inode,
         int len = de->d_name.len;
         int error;
 
-        lock_kernel();
-
-        if (coda_isroot(dir_inode) && coda_iscontrol(name, len)) {
-                unlock_kernel();
+        if (coda_isroot(dir_inode) && coda_iscontrol(name, len))
                 return -EPERM;
-        }
 
         error = venus_link(dir_inode->i_sb, coda_i2f(inode),
                            coda_i2f(dir_inode), (const char *)name, len);
-
         if (error) {
                 d_drop(de);
-                goto out;
+                return error;
         }
 
         coda_dir_update_mtime(dir_inode);
         atomic_inc(&inode->i_count);
         d_instantiate(de, inode);
         inc_nlink(inode);
-
-out:
-        unlock_kernel();
-        return(error);
+        return 0;
 }
 
 
 static int coda_symlink(struct inode *dir_inode, struct dentry *de,
                         const char *symname)
 {
-        const char *name = de->d_name.name;
+        const char *name = de->d_name.name;
         int len = de->d_name.len;
         int symlen;
-        int error = 0;
-
-        lock_kernel();
+        int error;
 
-        if (coda_isroot(dir_inode) && coda_iscontrol(name, len)) {
-                unlock_kernel();
+        if (coda_isroot(dir_inode) && coda_iscontrol(name, len))
                 return -EPERM;
-        }
 
         symlen = strlen(symname);
-        if ( symlen > CODA_MAXPATHLEN ) {
-                unlock_kernel();
+        if (symlen > CODA_MAXPATHLEN)
                 return -ENAMETOOLONG;
-        }
 
         /*
          * This entry is now negative. Since we do not create
@@ -344,10 +307,9 @@ static int coda_symlink(struct inode *dir_inode, struct dentry *de,
                               symname, symlen);
 
         /* mtime is no good anymore */
-        if ( !error )
+        if (!error)
                 coda_dir_update_mtime(dir_inode);
 
-        unlock_kernel();
         return error;
 }
 
@@ -358,17 +320,12 @@ static int coda_unlink(struct inode *dir, struct dentry *de)
         const char *name = de->d_name.name;
         int len = de->d_name.len;
 
-        lock_kernel();
-
         error = venus_remove(dir->i_sb, coda_i2f(dir), name, len);
-        if ( error ) {
-                unlock_kernel();
+        if (error)
                 return error;
-        }
 
         coda_dir_update_mtime(dir);
         drop_nlink(de->d_inode);
-        unlock_kernel();
         return 0;
 }
 
@@ -378,8 +335,6 @@ static int coda_rmdir(struct inode *dir, struct dentry *de)
         int len = de->d_name.len;
         int error;
 
-        lock_kernel();
-
         error = venus_rmdir(dir->i_sb, coda_i2f(dir), name, len);
         if (!error) {
                 /* VFS may delete the child */
@@ -390,7 +345,6 @@ static int coda_rmdir(struct inode *dir, struct dentry *de)
                 coda_dir_drop_nlink(dir);
                 coda_dir_update_mtime(dir);
         }
-        unlock_kernel();
         return error;
 }
 
@@ -404,15 +358,12 @@ static int coda_rename(struct inode *old_dir, struct dentry *old_dentry,
         int new_length = new_dentry->d_name.len;
         int error;
 
-        lock_kernel();
-
         error = venus_rename(old_dir->i_sb, coda_i2f(old_dir),
                              coda_i2f(new_dir), old_length, new_length,
                              (const char *) old_name, (const char *)new_name);
-
-        if ( !error ) {
-                if ( new_dentry->d_inode ) {
-                        if ( S_ISDIR(new_dentry->d_inode->i_mode) ) {
+        if (!error) {
+                if (new_dentry->d_inode) {
+                        if (S_ISDIR(new_dentry->d_inode->i_mode)) {
                                 coda_dir_drop_nlink(old_dir);
                                 coda_dir_inc_nlink(new_dir);
                         }
@@ -424,8 +375,6 @@ static int coda_rename(struct inode *old_dir, struct dentry *old_dentry,
                         coda_flag_inode(new_dir, C_VATTR);
                 }
         }
-        unlock_kernel();
-
         return error;
 }
 
@@ -595,10 +544,7 @@ static int coda_dentry_revalidate(struct dentry *de, struct nameidata *nd)
         struct inode *inode = de->d_inode;
         struct coda_inode_info *cii;
 
-        if (!inode)
-                return 1;
-        lock_kernel();
-        if (coda_isroot(inode))
+        if (!inode || coda_isroot(inode))
                 goto out;
         if (is_bad_inode(inode))
                 goto bad;
@@ -621,12 +567,9 @@ static int coda_dentry_revalidate(struct dentry *de, struct nameidata *nd)
         spin_lock(&cii->c_lock);
         cii->c_flags &= ~(C_VATTR | C_PURGE | C_FLUSH);
         spin_unlock(&cii->c_lock);
-
 bad:
-        unlock_kernel();
         return 0;
 out:
-        unlock_kernel();
         return 1;
 }
 
@@ -659,20 +602,19 @@ static int coda_dentry_delete(struct dentry * dentry)
 int coda_revalidate_inode(struct dentry *dentry)
 {
         struct coda_vattr attr;
-        int error = 0;
+        int error;
         int old_mode;
         ino_t old_ino;
         struct inode *inode = dentry->d_inode;
         struct coda_inode_info *cii = ITOC(inode);
 
-        lock_kernel();
-        if ( !cii->c_flags )
-                goto ok;
+        if (!cii->c_flags)
+                return 0;
 
         if (cii->c_flags & (C_VATTR | C_PURGE | C_FLUSH)) {
                 error = venus_getattr(inode->i_sb, &(cii->c_fid), &attr);
-                if ( error )
-                        goto return_bad;
+                if (error)
+                        return -EIO;
 
                 /* this inode may be lost if:
                    - it's ino changed 
@@ -691,7 +633,7 @@ int coda_revalidate_inode(struct dentry *dentry)
                 /* the following can happen when a local fid is replaced 
                    with a global one, here we lose and declare the inode bad */
                 if (inode->i_ino != old_ino)
-                        goto return_bad;
+                        return -EIO;
                 
                 coda_flag_inode_children(inode, C_FLUSH);
 
@@ -699,12 +641,5 @@ int coda_revalidate_inode(struct dentry *dentry)
                 cii->c_flags &= ~(C_VATTR | C_PURGE | C_FLUSH);
                 spin_unlock(&cii->c_lock);
         }
-
-ok:
-        unlock_kernel();
         return 0;
-
-return_bad:
-        unlock_kernel();
-        return -EIO;
 }
diff --git a/fs/coda/file.c b/fs/coda/file.c
index c4e395781d41..c8b50ba4366a 100644
--- a/fs/coda/file.c
+++ b/fs/coda/file.c
@@ -15,7 +15,6 @@
 #include <linux/stat.h>
 #include <linux/cred.h>
 #include <linux/errno.h>
-#include <linux/smp_lock.h>
 #include <linux/spinlock.h>
 #include <linux/string.h>
 #include <linux/slab.h>
@@ -144,8 +143,6 @@ int coda_open(struct inode *coda_inode, struct file *coda_file)
         if (!cfi)
                 return -ENOMEM;
 
-        lock_kernel();
-
         error = venus_open(coda_inode->i_sb, coda_i2f(coda_inode), coda_flags,
                            &host_file);
         if (!host_file)
@@ -153,7 +150,6 @@ int coda_open(struct inode *coda_inode, struct file *coda_file)
 
         if (error) {
                 kfree(cfi);
-                unlock_kernel();
                 return error;
         }
 
@@ -165,8 +161,6 @@ int coda_open(struct inode *coda_inode, struct file *coda_file)
 
         BUG_ON(coda_file->private_data != NULL);
         coda_file->private_data = cfi;
-
-        unlock_kernel();
         return 0;
 }
 
@@ -177,9 +171,7 @@ int coda_release(struct inode *coda_inode, struct file *coda_file)
         struct coda_file_info *cfi;
         struct coda_inode_info *cii;
         struct inode *host_inode;
-        int err = 0;
-
-        lock_kernel();
+        int err;
 
         cfi = CODA_FTOC(coda_file);
         BUG_ON(!cfi || cfi->cfi_magic != CODA_MAGIC);
@@ -203,8 +195,6 @@ int coda_release(struct inode *coda_inode, struct file *coda_file)
         kfree(coda_file->private_data);
         coda_file->private_data = NULL;
 
-        unlock_kernel();
-
         /* VFS fput ignores the return value from file_operations->release, so
          * there is no use returning an error here */
         return 0;
@@ -215,7 +205,7 @@ int coda_fsync(struct file *coda_file, int datasync)
         struct file *host_file;
         struct inode *coda_inode = coda_file->f_path.dentry->d_inode;
         struct coda_file_info *cfi;
-        int err = 0;
+        int err;
 
         if (!(S_ISREG(coda_inode->i_mode) || S_ISDIR(coda_inode->i_mode) ||
               S_ISLNK(coda_inode->i_mode)))
@@ -226,11 +216,8 @@ int coda_fsync(struct file *coda_file, int datasync)
         host_file = cfi->cfi_container;
 
         err = vfs_fsync(host_file, datasync);
-        if ( !err && !datasync ) {
-                lock_kernel();
+        if (!err && !datasync)
                 err = venus_fsync(coda_inode->i_sb, coda_i2f(coda_inode));
-                unlock_kernel();
-        }
 
         return err;
 }
diff --git a/fs/coda/inode.c b/fs/coda/inode.c
index 0553f3bd7b1b..b7fa3e3d772f 100644
--- a/fs/coda/inode.c
+++ b/fs/coda/inode.c
@@ -150,8 +150,6 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
         int error;
         int idx;
 
-        lock_kernel();
-
         idx = get_device_index((struct coda_mount_data *) data);
 
         /* Ignore errors in data, for backward compatibility */
@@ -161,23 +159,26 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
         printk(KERN_INFO "coda_read_super: device index: %i\n", idx);
 
         vc = &coda_comms[idx];
+        lock_kernel();
+
         if (!vc->vc_inuse) {
                 printk("coda_read_super: No pseudo device\n");
-                unlock_kernel();
-                return -EINVAL;
+                error = -EINVAL;
+                goto unlock_out;
         }
 
-        if ( vc->vc_sb ) {
+        if (vc->vc_sb) {
                 printk("coda_read_super: Device already mounted\n");
-                unlock_kernel();
-                return -EBUSY;
+                error = -EBUSY;
+                goto unlock_out;
         }
 
         error = bdi_setup_and_register(&vc->bdi, "coda", BDI_CAP_MAP_COPY);
         if (error)
-                goto bdi_err;
+                goto unlock_out;
 
         vc->vc_sb = sb;
+        unlock_kernel();
 
         sb->s_fs_info = vc;
         sb->s_flags |= MS_NOATIME;
@@ -206,21 +207,23 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
         printk("coda_read_super: rootinode is %ld dev %s\n", 
                root->i_ino, root->i_sb->s_id);
         sb->s_root = d_alloc_root(root);
-        if (!sb->s_root)
+        if (!sb->s_root) {
+                error = -EINVAL;
                 goto error;
-        unlock_kernel();
+        }
         return 0;
 
- error:
-        bdi_destroy(&vc->bdi);
- bdi_err:
+error:
         if (root)
                 iput(root);
-        if (vc)
-                vc->vc_sb = NULL;
 
+        lock_kernel();
+        bdi_destroy(&vc->bdi);
+        vc->vc_sb = NULL;
+        sb->s_fs_info = NULL;
+unlock_out:
         unlock_kernel();
-        return -EINVAL;
+        return error;
 }
 
 static void coda_put_super(struct super_block *sb)
@@ -253,8 +256,6 @@ int coda_setattr(struct dentry *de, struct iattr *iattr)
         struct coda_vattr vattr;
         int error;
 
-        lock_kernel();
-        
         memset(&vattr, 0, sizeof(vattr)); 
 
         inode->i_ctime = CURRENT_TIME_SEC;
@@ -264,13 +265,10 @@ int coda_setattr(struct dentry *de, struct iattr *iattr)
         /* Venus is responsible for truncating the container-file!!! */
         error = venus_setattr(inode->i_sb, coda_i2f(inode), &vattr);
 
-        if ( !error ) {
+        if (!error) {
                 coda_vattr_to_iattr(inode, &vattr); 
                 coda_cache_clear_inode(inode);
         }
-
-        unlock_kernel();
-
         return error;
 }
 
@@ -284,12 +282,8 @@ static int coda_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
         int error;
         
-        lock_kernel();
-
         error = venus_statfs(dentry, buf);
 
-        unlock_kernel();
-
         if (error) {
                 /* fake something like AFS does */
                 buf->f_blocks = 9000000;
diff --git a/fs/coda/pioctl.c b/fs/coda/pioctl.c
index 028a9a0f588b..2fd89b5c5c7b 100644
--- a/fs/coda/pioctl.c
+++ b/fs/coda/pioctl.c
@@ -23,8 +23,6 @@
 #include <linux/coda_fs_i.h>
 #include <linux/coda_psdev.h>
 
-#include <linux/smp_lock.h>
-
 /* pioctl ops */
 static int coda_ioctl_permission(struct inode *inode, int mask);
 static long coda_pioctl(struct file *filp, unsigned int cmd,
@@ -58,13 +56,9 @@ static long coda_pioctl(struct file *filp, unsigned int cmd,
         struct inode *target_inode = NULL;
         struct coda_inode_info *cnp;
 
-        lock_kernel();
-
         /* get the Pioctl data arguments from user space */
-        if (copy_from_user(&data, (void __user *)user_data, sizeof(data))) {
-                error = -EINVAL;
-                goto out;
-        }
+        if (copy_from_user(&data, (void __user *)user_data, sizeof(data)))
+                return -EINVAL;
 
         /*
          * Look up the pathname. Note that the pathname is in
@@ -76,13 +70,12 @@ static long coda_pioctl(struct file *filp, unsigned int cmd,
                 error = user_lpath(data.path, &path);
 
         if (error)
-                goto out;
-        else
-                target_inode = path.dentry->d_inode;
+                return error;
+
+        target_inode = path.dentry->d_inode;
 
         /* return if it is not a Coda inode */
         if (target_inode->i_sb != inode->i_sb) {
-                path_put(&path);
                 error = -EINVAL;
                 goto out;
         }
@@ -91,10 +84,7 @@ static long coda_pioctl(struct file *filp, unsigned int cmd,
         cnp = ITOC(target_inode);
 
         error = venus_pioctl(inode->i_sb, &(cnp->c_fid), cmd, &data);
-
-        path_put(&path);
-
 out:
-        unlock_kernel();
+        path_put(&path);
         return error;
 }
diff --git a/fs/coda/psdev.c b/fs/coda/psdev.c
index fdc2f3ef7ecd..9a9248e632c6 100644
--- a/fs/coda/psdev.c
+++ b/fs/coda/psdev.c
@@ -108,16 +108,9 @@ static ssize_t coda_psdev_write(struct file *file, const char __user *buf,
                 return -EFAULT;
 
         if (DOWNCALL(hdr.opcode)) {
-                struct super_block *sb = NULL;
-                union outputArgs *dcbuf;
+                union outputArgs *dcbuf;
                 int size = sizeof(*dcbuf);
 
-                sb = vcp->vc_sb;
-                if ( !sb ) {
-                        count = nbytes;
-                        goto out;
-                }
-
                 if  ( nbytes < sizeof(struct coda_out_hdr) ) {
                         printk("coda_downcall opc %d uniq %d, not enough!\n",
                                hdr.opcode, hdr.unique);
@@ -137,9 +130,7 @@ static ssize_t coda_psdev_write(struct file *file, const char __user *buf,
                 }
 
                 /* what downcall errors does Venus handle ? */
-                lock_kernel();
-                error = coda_downcall(hdr.opcode, dcbuf, sb);
-                unlock_kernel();
+                error = coda_downcall(vcp, hdr.opcode, dcbuf);
 
                 CODA_FREE(dcbuf, nbytes);
                 if (error) {
diff --git a/fs/coda/symlink.c b/fs/coda/symlink.c
index 4513b7258458..af78f007a2b0 100644
--- a/fs/coda/symlink.c
+++ b/fs/coda/symlink.c
@@ -14,7 +14,6 @@
 #include <linux/stat.h>
 #include <linux/errno.h>
 #include <linux/pagemap.h>
-#include <linux/smp_lock.h>
 
 #include <linux/coda.h>
 #include <linux/coda_linux.h>
@@ -29,11 +28,9 @@ static int coda_symlink_filler(struct file *file, struct page *page)
         unsigned int len = PAGE_SIZE;
         char *p = kmap(page);
 
-        lock_kernel();
         cii = ITOC(inode);
 
         error = venus_readlink(inode->i_sb, &cii->c_fid, p, &len);
-        unlock_kernel();
         if (error)
                 goto fail;
         SetPageUptodate(page);
diff --git a/fs/coda/upcall.c b/fs/coda/upcall.c
index b8893ab6f9e6..4c258cb5266d 100644
--- a/fs/coda/upcall.c
+++ b/fs/coda/upcall.c
@@ -27,6 +27,7 @@
 #include <linux/errno.h>
 #include <linux/string.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 #include <linux/vmalloc.h>
 #include <linux/vfs.h>
@@ -667,18 +668,23 @@ static int coda_upcall(struct venus_comm *vcp,
 {
         union outputArgs *out;
         union inputArgs *sig_inputArgs;
-        struct upc_req *req, *sig_req;
-        int error = 0;
+        struct upc_req *req = NULL, *sig_req;
+        int error;
+
+        lock_kernel();
 
         if (!vcp->vc_inuse) {
                 printk(KERN_NOTICE "coda: Venus dead, not sending upcall\n");
-                return -ENXIO;
+                error = -ENXIO;
+                goto exit;
         }
 
         /* Format the request message. */
         req = kmalloc(sizeof(struct upc_req), GFP_KERNEL);
-        if (!req)
-                return -ENOMEM;
+        if (!req) {
+                error = -ENOMEM;
+                goto exit;
+        }
 
         req->uc_data = (void *)buffer;
         req->uc_flags = 0;
@@ -759,6 +765,7 @@ static int coda_upcall(struct venus_comm *vcp,
 
 exit:
         kfree(req);
+        unlock_kernel();
         return error;
 }
 
@@ -796,21 +803,24 @@ exit:
  *
  * CODA_REPLACE -- replace one CodaFid with another throughout the name cache */
 
-int coda_downcall(int opcode, union outputArgs * out, struct super_block *sb)
+int coda_downcall(struct venus_comm *vcp, int opcode, union outputArgs *out)
 {
         struct inode *inode = NULL;
         struct CodaFid *fid, *newfid;
+        struct super_block *sb;
 
         /* Handle invalidation requests. */
-        if ( !sb || !sb->s_root)
-                return 0;
+        lock_kernel();
+        sb = vcp->vc_sb;
+        if (!sb || !sb->s_root)
+                goto unlock_out;
 
         switch (opcode) {
         case CODA_FLUSH:
                 coda_cache_clear_all(sb);
                 shrink_dcache_sb(sb);
                 if (sb->s_root->d_inode)
-                    coda_flag_inode(sb->s_root->d_inode, C_FLUSH);
+                        coda_flag_inode(sb->s_root->d_inode, C_FLUSH);
                 break;
 
         case CODA_PURGEUSER:
@@ -855,9 +865,11 @@ int coda_downcall(int opcode, union outputArgs * out, struct super_block *sb)
                 break;
         }
 
+unlock_out:
+        unlock_kernel();
+
         if (inode)
                 iput(inode);
-
         return 0;
 }