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authorRicardo Labiaga <Ricardo.Labiaga@netapp.com>2010-10-12 16:30:06 -0700
committerTrond Myklebust <Trond.Myklebust@netapp.com>2010-10-24 18:00:04 -0400
commit55b6e7742d5b25182edf410369379b9727b2e5bc (patch)
tree7dbe87bdf772c4ec1896a8620c97b536cbcf73c6 /fs/nfs/nfs4xdr.c
parent6b96724e507fecc3e6440e86426fe4f44359ed66 (diff)
Ask for time_delta during fsinfo probe
Used by the client to determine if the server has a granular enough time stamp. Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/nfs4xdr.c')
-rw-r--r--fs/nfs/nfs4xdr.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 1e5d68e36e07..7131c761d85c 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -3582,6 +3582,24 @@ static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, s
return status;
}
+static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
+ struct timespec *time)
+{
+ int status = 0;
+
+ time->tv_sec = 0;
+ time->tv_nsec = 0;
+ if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
+ return -EIO;
+ if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
+ status = decode_attr_time(xdr, time);
+ bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
+ }
+ dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
+ (long)time->tv_nsec);
+ return status;
+}
+
static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
{
int status = 0;
@@ -3982,6 +4000,9 @@ static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
goto xdr_error;
fsinfo->wtpref = fsinfo->wtmax;
+ status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
+ if (status != 0)
+ goto xdr_error;
status = verify_attr_len(xdr, savep, attrlen);
xdr_error: