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We should be using the length from the second vfs_getxattr, in case it
changed. (Note: there's still a small race here; we could end up returning
-ENOMEM if the length increased between the first and second call. I don't
know whether it's worth spending a lot of effort to fix that.)
This makes XFS ACLs usable on NFS exports, which they currently aren't,
since XFS appears to be returning a too-large value for vfs_getxattr() when
it's passed a NULL buffer. So there's probably an XFS bug here too, though
since getxattr with a NULL buffer is usually used to decide how much memory
to allocate, it may be a fairly harmless bug in most cases.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
### Diffstat output
./fs/nfsd/vfs.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff ./fs/nfsd/vfs.c~current~ ./fs/nfsd/vfs.c
--- ./fs/nfsd/vfs.c~current~ 2006-04-03 15:12:07.000000000 +1000
+++ ./fs/nfsd/vfs.c 2006-04-03 15:12:07.000000000 +1000
@@ -371,7 +371,6 @@ out_nfserr:
static ssize_t nfsd_getxattr(struct dentry *dentry, char *key, void **buf)
{
ssize_t buflen;
- int error;
buflen = vfs_getxattr(dentry, key, NULL, 0);
if (buflen <= 0)
@@ -381,10 +380,7 @@ static ssize_t nfsd_getxattr(struct dent
if (!*buf)
return -ENOMEM;
- error = vfs_getxattr(dentry, key, *buf, buflen);
- if (error < 0)
- return error;
- return buflen;
+ return vfs_getxattr(dentry, key, *buf, buflen);
}
#endif
-
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