On Thu, Jan 16, 2014 at 11:54:07AM -0500, Bob Peterson wrote:
> ----- Original Message -----
> | Something like this?
> (snip)
> | @@ -779,6 +782,11 @@ static struct dentry *__gfs2_lookup(struct inode *dir,
> | struct dentry *dentry,
> | }
> |
> | d = d_splice_alias(inode, dentry);
> | + if (IS_ERR(d)) {
> | + iput(inode);
> | + gfs2_glock_dq_uninit(&gh);
> | + return ERR_PTR(error);
>
> ---------------------------------^
> Shouldn't that be ERR_PTR(d)?
Oops, yeah--well, actually just "d" I guess.
This is what I've got for what it's worth.
--b.
commit 6fba5295019b52a03d76c9e9570952466051a7a6
Author: J. Bruce Fields <bfields@xxxxxxxxxx>
Date: Thu Jan 16 11:44:53 2014 -0500
gfs2: revert "GFS2: d_splice_alias() can't return error"
0d0d110720d7960b77c03c9f2597faaff4b484ae asserts that "d_splice_alias()
can't return error unless it was given an IS_ERR(inode)".
That was true of the implementation of d_splice_alias, but this is
really a problem with d_splice_alias: at a minimum it should be able to
return -ELOOP in the case where inserting the given dentry would cause a
directory loop.
Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxx>
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 7119504..3f44902 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -585,6 +585,9 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
error = PTR_ERR(inode);
if (!IS_ERR(inode)) {
d = d_splice_alias(inode, dentry);
+ error = PTR_ERR(d);
+ if (IS_ERR(d))
+ goto fail_gunlock;
error = 0;
if (file) {
if (S_ISREG(inode->i_mode)) {
@@ -779,6 +782,11 @@ static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry,
}
d = d_splice_alias(inode, dentry);
+ if (IS_ERR(d)) {
+ iput(inode);
+ gfs2_glock_dq_uninit(&gh);
+ return d;
+ }
if (file && S_ISREG(inode->i_mode))
error = finish_open(file, dentry, gfs2_open_common, opened);
--
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