NFS: Fix a sillyrename race...
Ensure that readdir revalidates its data cache after blocking on
sillyrename.
Also fix a typo in nfs_do_call_unlink(): swap the ^= for an |=. The result
is the same, since we've already checked that the flag is unset, but it
makes the code more readable.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index f697b5c..d9abdb1 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -537,12 +537,6 @@
lock_kernel();
- res = nfs_revalidate_mapping_nolock(inode, filp->f_mapping);
- if (res < 0) {
- unlock_kernel();
- return res;
- }
-
/*
* filp->f_pos points to the dirent entry number.
* *desc->dir_cookie has the cookie for the next entry. We have
@@ -564,6 +558,10 @@
desc->entry = &my_entry;
nfs_block_sillyrename(dentry);
+ res = nfs_revalidate_mapping_nolock(inode, filp->f_mapping);
+ if (res < 0)
+ goto out;
+
while(!desc->entry->eof) {
res = readdir_search_pagecache(desc);
@@ -594,6 +592,7 @@
break;
}
}
+out:
nfs_unblock_sillyrename(dentry);
unlock_kernel();
if (res > 0)
diff --git a/fs/nfs/unlink.c b/fs/nfs/unlink.c
index 233ad38..c5fa6d8 100644
--- a/fs/nfs/unlink.c
+++ b/fs/nfs/unlink.c
@@ -138,7 +138,7 @@
spin_lock(&alias->d_lock);
if (!(alias->d_flags & DCACHE_NFSFS_RENAMED)) {
alias->d_fsdata = data;
- alias->d_flags ^= DCACHE_NFSFS_RENAMED;
+ alias->d_flags |= DCACHE_NFSFS_RENAMED;
ret = 1;
}
spin_unlock(&alias->d_lock);
