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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-04-27 13:48:18 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-05-01 15:42:43 -0400 |
| commit | 3a1556e8662cc425c433b463fcdae138908ca467 (patch) | |
| tree | c4c16f7e33612c3ce3b504e9eedbf336d0c4bf20 | |
| parent | 6a4506c0b56889aaa15bcf50b3c75f46a8d0a3bd (diff) | |
| download | linux-stable-3a1556e8662cc425c433b463fcdae138908ca467.tar.gz linux-stable-3a1556e8662cc425c433b463fcdae138908ca467.tar.bz2 linux-stable-3a1556e8662cc425c433b463fcdae138908ca467.zip | |
NFSv2/v3: Simulate the change attribute
Use the ctime to simulate a change attribute for NFSv2 and NFSv3.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| -rw-r--r-- | fs/nfs/client.c | 2 | ||||
| -rw-r--r-- | fs/nfs/internal.h | 12 | ||||
| -rw-r--r-- | fs/nfs/nfs2xdr.c | 2 | ||||
| -rw-r--r-- | fs/nfs/nfs3xdr.c | 3 | ||||
| -rw-r--r-- | include/linux/nfs_xdr.h | 6 |
5 files changed, 21 insertions, 4 deletions
diff --git a/fs/nfs/client.c b/fs/nfs/client.c index 60f7e4ec842c..a8f8de618d73 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -880,7 +880,7 @@ static int nfs_init_server(struct nfs_server *server, server->options = data->options; server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID| NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP| - NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME; + NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME|NFS_CAP_CHANGE_ATTR; if (data->rsize) server->rsize = nfs_block_size(data->rsize, NULL); diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 0fd1efaf1cff..1855e8fea423 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -493,3 +493,15 @@ unsigned int nfs_page_array_len(unsigned int base, size_t len) PAGE_SIZE - 1) >> PAGE_SHIFT; } +/* + * Convert a struct timespec into a 64-bit change attribute + * + * This does approximately the same thing as timespec_to_ns(), + * but for calculation efficiency, we multiply the seconds by + * 1024*1024*1024. + */ +static inline +u64 nfs_timespec_to_change_attr(const struct timespec *ts) +{ + return ((u64)ts->tv_sec << 30) + ts->tv_nsec; +} diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c index 1f56000fabbd..c99008e9d8a4 100644 --- a/fs/nfs/nfs2xdr.c +++ b/fs/nfs/nfs2xdr.c @@ -313,6 +313,8 @@ static int decode_fattr(struct xdr_stream *xdr, struct nfs_fattr *fattr) p = xdr_decode_time(p, &fattr->atime); p = xdr_decode_time(p, &fattr->mtime); xdr_decode_time(p, &fattr->ctime); + fattr->change_attr = nfs_timespec_to_change_attr(&fattr->ctime); + return 0; out_overflow: print_overflow_msg(__func__, xdr); diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c index 01e53e94f53d..ee284c2b2757 100644 --- a/fs/nfs/nfs3xdr.c +++ b/fs/nfs/nfs3xdr.c @@ -675,6 +675,7 @@ static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr) p = xdr_decode_nfstime3(p, &fattr->atime); p = xdr_decode_nfstime3(p, &fattr->mtime); xdr_decode_nfstime3(p, &fattr->ctime); + fattr->change_attr = nfs_timespec_to_change_attr(&fattr->ctime); fattr->valid |= NFS_ATTR_FATTR_V3; return 0; @@ -725,12 +726,14 @@ static int decode_wcc_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) goto out_overflow; fattr->valid |= NFS_ATTR_FATTR_PRESIZE + | NFS_ATTR_FATTR_PRECHANGE | NFS_ATTR_FATTR_PREMTIME | NFS_ATTR_FATTR_PRECTIME; p = xdr_decode_size3(p, &fattr->pre_size); p = xdr_decode_nfstime3(p, &fattr->pre_mtime); xdr_decode_nfstime3(p, &fattr->pre_ctime); + fattr->pre_change_attr = nfs_timespec_to_change_attr(&fattr->pre_ctime); return 0; out_overflow: diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 6deb8f097c42..bc3680885428 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -106,14 +106,14 @@ struct nfs_fattr { | NFS_ATTR_FATTR_FILEID \ | NFS_ATTR_FATTR_ATIME \ | NFS_ATTR_FATTR_MTIME \ - | NFS_ATTR_FATTR_CTIME) + | NFS_ATTR_FATTR_CTIME \ + | NFS_ATTR_FATTR_CHANGE) #define NFS_ATTR_FATTR_V2 (NFS_ATTR_FATTR \ | NFS_ATTR_FATTR_BLOCKS_USED) #define NFS_ATTR_FATTR_V3 (NFS_ATTR_FATTR \ | NFS_ATTR_FATTR_SPACE_USED) #define NFS_ATTR_FATTR_V4 (NFS_ATTR_FATTR \ - | NFS_ATTR_FATTR_SPACE_USED \ - | NFS_ATTR_FATTR_CHANGE) + | NFS_ATTR_FATTR_SPACE_USED) /* * Info on the file system |