commit 2158c99307d0ca7d6a2eb9889c6b2ad8ce508aa4
Author: Erez Zadok <[EMAIL PROTECTED]>
Date: Wed Apr 23 19:13:04 2008 -0400
Unionfs: maintain one-open-file invariant for non-directories
Signed-off-by: Erez Zadok <[EMAIL PROTECTED]>
diff --git a/fs/unionfs/commonfops.c b/fs/unionfs/commonfops.c
index 2706194..82b0eea 100644
--- a/fs/unionfs/commonfops.c
+++ b/fs/unionfs/commonfops.c
@@ -320,7 +320,9 @@ static int __unionfs_file_revalidate(struct file *file,
struct dentry *dentry,
* to refresh things.
*/
if (d_deleted(dentry) ||
- (sbgen <= fgen && dbstart(dentry) == fbstart(file)))
+ (sbgen <= fgen &&
+ dbstart(dentry) == fbstart(file) &&
+ unionfs_lower_file(file)))
goto out_may_copyup;
/* save orig branch ID */
@@ -369,6 +371,8 @@ static int __unionfs_file_revalidate(struct file *file,
struct dentry *dentry,
unionfs_mntput(sb->s_root,
branch_id_to_idx(sb, orig_brid));
}
+ /* regular files have only one open lower file */
+ fbend(file) = fbstart(file);
}
atomic_set(&UNIONFS_F(file)->generation,
atomic_read(&UNIONFS_I(dentry->d_inode)->generation));
@@ -381,6 +385,9 @@ out_may_copyup:
pr_debug("unionfs: do delay copyup of \"%s\"\n",
dentry->d_name.name);
err = do_delayed_copyup(file);
+ /* regular files have only one open lower file */
+ if (!err && !S_ISDIR(dentry->d_inode->i_mode))
+ fbend(file) = fbstart(file);
}
out:
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