To add support for eCryptfs mounts on top of NFS client mounts, the NFS
client must properly handle NULL nameidata pointers in its d_revalidate
functions.
NFS clients should also handle NULL nameidata in its create functions,
although this is not currently required for eCryptfs support.
Signed-off-by: Tyler Hicks <tyhicks@xxxxxxxxxxxxxxxxxx>
---
fs/nfs/dir.c | 8 ++++----
1 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 7237672..03c6ab2 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1095,7 +1095,7 @@ static int nfs_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
struct nfs_fattr *fattr = NULL;
int error;
- if (nd->flags & LOOKUP_RCU)
+ if (nd && nd->flags & LOOKUP_RCU)
return -ECHILD;
parent = dget_parent(dentry);
@@ -1493,7 +1493,7 @@ static int nfs_open_revalidate(struct dentry *dentry, struct nameidata *nd)
struct nfs_open_context *ctx;
int openflags, ret = 0;
- if (nd->flags & LOOKUP_RCU)
+ if (nd && nd->flags & LOOKUP_RCU)
return -ECHILD;
inode = dentry->d_inode;
@@ -1583,7 +1583,7 @@ static int nfs_open_create(struct inode *dir, struct dentry *dentry, int mode,
attr.ia_mode = mode;
attr.ia_valid = ATTR_MODE;
- if ((nd->flags & LOOKUP_CREATE) != 0) {
+ if (nd && (nd->flags & LOOKUP_CREATE) != 0) {
open_flags = nd->intent.open.flags;
ctx = nameidata_to_nfs_open_context(dentry, nd);
@@ -1673,7 +1673,7 @@ static int nfs_create(struct inode *dir, struct dentry *dentry, int mode,
attr.ia_mode = mode;
attr.ia_valid = ATTR_MODE;
- if ((nd->flags & LOOKUP_CREATE) != 0)
+ if (nd && (nd->flags & LOOKUP_CREATE) != 0)
open_flags = nd->intent.open.flags;
error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags, NULL);
--
1.7.4.4
--
To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
