unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
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Ask for time_delta during fsinfo probe

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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>
This commit is contained in:
Ricardo Labiaga 2010-10-12 16:30:06 -07:00 committed by Trond Myklebust
parent 6b96724e50
commit 55b6e7742d
2 changed files with 22 additions and 1 deletions
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2
fs/nfs/nfs4proc.c
View file

@ -129,7 +129,7 @@ const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
| FATTR4_WORD0_MAXREAD
| FATTR4_WORD0_MAXWRITE
| FATTR4_WORD0_LEASE_TIME,
0
FATTR4_WORD1_TIME_DELTA
};
const u32 nfs4_fs_locations_bitmap[2] = {

21
fs/nfs/nfs4xdr.c
View file

@ -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: