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authorJeff Layton <jlayton@redhat.com>2007-06-05 14:49:03 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2007-07-10 23:40:25 -0400
commitaa53ed541a1fec78a78d02afc8b042d040cc080d (patch)
tree04d4c66b643e4ec9ec1277f3ad642b18f3f94990 /fs/nfs
parentfc6ae3cf482c385a6fe87ba119d399bb85aa670b (diff)
NFS4: on a O_EXCL OPEN make sure SETATTR sets the fields holding the verifier
The Linux NFS4 client simply skips over the bitmask in an O_EXCL open call and so it doesn't bother to reset any fields that may be holding the verifier. This patch has us save the first two words of the bitmask (which is all the current client has #defines for). The client then later checks this bitmask and turns on the appropriate flags in the sattr->ia_verify field for the following SETATTR call. This patch only currently checks to see if the server used the atime and mtime slots for the verifier (which is what the Linux server uses for this). I'm not sure of what other fields the server could reasonably use, but adding checks for others should be trivial. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/nfs4proc.c20
-rw-r--r--fs/nfs/nfs4xdr.c9
2 files changed, 27 insertions, 2 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 3cc75445a68..fee2d14b158 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -943,6 +943,22 @@ static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, st
}
/*
+ * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
+ * fields corresponding to attributes that were used to store the verifier.
+ * Make sure we clobber those fields in the later setattr call
+ */
+static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
+{
+ if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
+ !(sattr->ia_valid & ATTR_ATIME_SET))
+ sattr->ia_valid |= ATTR_ATIME;
+
+ if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
+ !(sattr->ia_valid & ATTR_MTIME_SET))
+ sattr->ia_valid |= ATTR_MTIME;
+}
+
+/*
* Returns a referenced nfs4_state
*/
static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
@@ -973,6 +989,9 @@ static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct
if (status != 0)
goto err_opendata_free;
+ if (opendata->o_arg.open_flags & O_EXCL)
+ nfs4_exclusive_attrset(opendata, sattr);
+
status = -ENOMEM;
state = nfs4_opendata_to_nfs4_state(opendata);
if (state == NULL)
@@ -1784,6 +1803,7 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
if (status == 0)
nfs_setattr_update_inode(state->inode, sattr);
+ nfs_post_op_update_inode(state->inode, &fattr);
}
if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
status = nfs4_intent_set_file(nd, &path, state);
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 8003c91ccb9..1fcca516e6e 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -3269,7 +3269,7 @@ static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
{
__be32 *p;
- uint32_t bmlen;
+ uint32_t savewords, bmlen, i;
int status;
status = decode_op_hdr(xdr, OP_OPEN);
@@ -3287,7 +3287,12 @@ static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
goto xdr_error;
READ_BUF(bmlen << 2);
- p += bmlen;
+ savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
+ for (i = 0; i < savewords; ++i)
+ READ32(res->attrset[i]);
+ for (; i < NFS4_BITMAP_SIZE; i++)
+ res->attrset[i] = 0;
+
return decode_delegation(xdr, res);
xdr_error:
dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);