Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs...

[pandora-kernel.git] / fs / btrfs / file.c

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index bd4d061..a35e51c 100644 (file)
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1081,7 +1081,8 @@ static noinline int prepare_pages(struct btrfs_root *root, struct file *file,
 
 again:
        for (i = 0; i < num_pages; i++) {
-               pages[i] = grab_cache_page(inode->i_mapping, index + i);
+               pages[i] = find_or_create_page(inode->i_mapping, index + i,
+                                              GFP_NOFS);
                if (!pages[i]) {
                        faili = i - 1;
                        err = -ENOMEM;
@@ -1238,9 +1239,11 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file,
                 * managed to copy.
                 */
                if (num_pages > dirty_pages) {
-                       if (copied > 0)
-                               atomic_inc(
-                                       &BTRFS_I(inode)->outstanding_extents);
+                       if (copied > 0) {
+                               spin_lock(&BTRFS_I(inode)->lock);
+                               BTRFS_I(inode)->outstanding_extents++;
+                               spin_unlock(&BTRFS_I(inode)->lock);
+                       }
                        btrfs_delalloc_release_space(inode,
                                        (num_pages - dirty_pages) <<
                                        PAGE_CACHE_SHIFT);
@@ -1452,7 +1455,7 @@ int btrfs_release_file(struct inode *inode, struct file *filp)
  * important optimization for directories because holding the mutex prevents
  * new operations on the dir while we write to disk.
  */
-int btrfs_sync_file(struct file *file, int datasync)
+int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 {
        struct dentry *dentry = file->f_path.dentry;
        struct inode *inode = dentry->d_inode;
@@ -1462,9 +1465,13 @@ int btrfs_sync_file(struct file *file, int datasync)
 
        trace_btrfs_sync_file(file, datasync);
 
+       ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+       if (ret)
+               return ret;
+       mutex_lock(&inode->i_mutex);
+
        /* we wait first, since the writeback may change the inode */
        root->log_batch++;
-       /* the VFS called filemap_fdatawrite for us */
        btrfs_wait_ordered_range(inode, 0, (u64)-1);
        root->log_batch++;
 
@@ -1472,8 +1479,10 @@ int btrfs_sync_file(struct file *file, int datasync)
         * check the transaction that last modified this inode
         * and see if its already been committed
         */
-       if (!BTRFS_I(inode)->last_trans)
+       if (!BTRFS_I(inode)->last_trans) {
+               mutex_unlock(&inode->i_mutex);
                goto out;
+       }
 
        /*
         * if the last transaction that changed this file was before
@@ -1484,6 +1493,7 @@ int btrfs_sync_file(struct file *file, int datasync)
        if (BTRFS_I(inode)->last_trans <=
            root->fs_info->last_trans_committed) {
                BTRFS_I(inode)->last_trans = 0;
+               mutex_unlock(&inode->i_mutex);
                goto out;
        }
 
@@ -1496,12 +1506,15 @@ int btrfs_sync_file(struct file *file, int datasync)
        trans = btrfs_start_transaction(root, 0);
        if (IS_ERR(trans)) {
                ret = PTR_ERR(trans);
+               mutex_unlock(&inode->i_mutex);
                goto out;
        }
 
        ret = btrfs_log_dentry_safe(trans, root, dentry);
-       if (ret < 0)
+       if (ret < 0) {
+               mutex_unlock(&inode->i_mutex);
                goto out;
+       }
 
        /* we've logged all the items and now have a consistent
         * version of the file in the log.  It is possible that
@@ -1513,7 +1526,7 @@ int btrfs_sync_file(struct file *file, int datasync)
         * file again, but that will end up using the synchronization
         * inside btrfs_sync_log to keep things safe.
         */
-       mutex_unlock(&dentry->d_inode->i_mutex);
+       mutex_unlock(&inode->i_mutex);
 
        if (ret != BTRFS_NO_LOG_SYNC) {
                if (ret > 0) {
@@ -1528,7 +1541,6 @@ int btrfs_sync_file(struct file *file, int datasync)
        } else {
                ret = btrfs_end_transaction(trans, root);
        }
-       mutex_lock(&dentry->d_inode->i_mutex);
 out:
        return ret > 0 ? -EIO : ret;
 }