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nfs: get clone_blksize when probing fsinfo 

NFSv42 CLONE operation is supposed to respect it.

Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
hifive-unleashed-5.1
Peng Tao 2015-09-26 02:24:37 +08:00 committed by Trond Myklebust
parent bea51b30b2
commit 2a92ee92d4
6 changed files with 30 additions and 0 deletions
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1
fs/nfs/client.c
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@ -764,6 +764,7 @@ static void nfs_server_set_fsinfo(struct nfs_server *server,
server->time_delta = fsinfo->time_delta;
server->clone_blksize = fsinfo->clone_blksize;
/* We're airborne Set socket buffersize */
rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
}

1
fs/nfs/nfs4proc.c
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@ -239,6 +239,7 @@ const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
FATTR4_WORD1_TIME_DELTA
| FATTR4_WORD1_FS_LAYOUT_TYPES,
FATTR4_WORD2_LAYOUT_BLKSIZE
| FATTR4_WORD2_CLONE_BLKSIZE
};
const u32 nfs4_fs_locations_bitmap[3] = {

25
fs/nfs/nfs4xdr.c
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@ -4764,6 +4764,28 @@ static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
return 0;
}
/*
* The granularity of a CLONE operation.
*/
static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
uint32_t *res)
{
__be32 *p;
dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
*res = 0;
if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p)) {
print_overflow_msg(__func__, xdr);
return -EIO;
}
*res = be32_to_cpup(p);
bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
}
return 0;
}
static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
{
unsigned int savep;
@ -4796,6 +4818,9 @@ static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
if (status != 0)
goto xdr_error;
status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
if (status)
goto xdr_error;
status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
if (status)
goto xdr_error;

1
include/linux/nfs4.h
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@ -422,6 +422,7 @@ enum lock_type4 {
#define FATTR4_WORD2_LAYOUT_TYPES (1UL << 0)
#define FATTR4_WORD2_LAYOUT_BLKSIZE (1UL << 1)
#define FATTR4_WORD2_MDSTHRESHOLD (1UL << 4)
#define FATTR4_WORD2_CLONE_BLKSIZE (1UL << 13)
#define FATTR4_WORD2_SECURITY_LABEL (1UL << 16)
/* MDS threshold bitmap bits */

1
include/linux/nfs_fs_sb.h
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@ -147,6 +147,7 @@ struct nfs_server {
unsigned int acdirmax;
unsigned int namelen;
unsigned int options; /* extra options enabled by mount */
unsigned int clone_blksize; /* granularity of a CLONE operation */
#define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */
#define NFS_OPTION_MIGRATION 0x00000002 /* - NFSv4 migration enabled */

1
include/linux/nfs_xdr.h
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@ -141,6 +141,7 @@ struct nfs_fsinfo {
__u32 lease_time; /* in seconds */
__u32 layouttype; /* supported pnfs layout driver */
__u32 blksize; /* preferred pnfs io block size */
__u32 clone_blksize; /* granularity of a CLONE operation */
};
struct nfs_fsstat {