Commit e377a3e6 authored by Ondrej Valousek's avatar Ondrej Valousek Committed by Chuck Lever
Browse files

nfsd: Add support for the birth time attribute 



For filesystems that supports "btime" timestamp (i.e. most modern
filesystems do) we share it via kernel nfsd. Btime support for NFS
client has already been added by Trond recently.

Suggested-by: default avatarBruce Fields <bfields@fieldses.org>
Signed-off-by: default avatarOndrej Valousek <ondrej.valousek.xm@renesas.com>
[ cel: addressed some whitespace/checkpatch nits ]
Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
parent 7e57714c

fs/nfsd/nfs4xdr.c

+10 −0
Original line number Diff line number Diff line
@@ -2854,6 +2854,9 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, 
	err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);

	if (err)

		goto out_nfserr;

	if (!(stat.result_mask & STATX_BTIME))

		/* underlying FS does not offer btime so we can't share it */

		bmval1 &= ~FATTR4_WORD1_TIME_CREATE;

	if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |

			FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||

	    (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
@@ -3254,6 +3257,13 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, 
		p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);

		*p++ = cpu_to_be32(stat.mtime.tv_nsec);

	}

	if (bmval1 & FATTR4_WORD1_TIME_CREATE) {

		p = xdr_reserve_space(xdr, 12);

		if (!p)

			goto out_resource;

		p = xdr_encode_hyper(p, (s64)stat.btime.tv_sec);

		*p++ = cpu_to_be32(stat.btime.tv_nsec);

	}

	if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {

		struct kstat parent_stat;

		u64 ino = stat.ino;

fs/nfsd/nfsd.h

+1 −1
Original line number Diff line number Diff line
@@ -364,7 +364,7 @@ void nfsd_lockd_shutdown(void); 
 | FATTR4_WORD1_OWNER	        | FATTR4_WORD1_OWNER_GROUP  | FATTR4_WORD1_RAWDEV           \

 | FATTR4_WORD1_SPACE_AVAIL     | FATTR4_WORD1_SPACE_FREE   | FATTR4_WORD1_SPACE_TOTAL      \

 | FATTR4_WORD1_SPACE_USED      | FATTR4_WORD1_TIME_ACCESS  | FATTR4_WORD1_TIME_ACCESS_SET  \

 | FATTR4_WORD1_TIME_DELTA   | FATTR4_WORD1_TIME_METADATA    \

 | FATTR4_WORD1_TIME_DELTA      | FATTR4_WORD1_TIME_METADATA   | FATTR4_WORD1_TIME_CREATE      \

 | FATTR4_WORD1_TIME_MODIFY     | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)



#define NFSD4_SUPPORTED_ATTRS_WORD2 0