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NFS: Get suppattr_exclcreat when getting server capabilities

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Create file with attributs as NFS4_CREATE_EXCLUSIVE4_1 mode
depends on suppattr_exclcreat attribut.

v3, same as v2.

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Kinglong Mee 2015-08-26 21:12:58 +08:00 • committed by Trond Myklebust
parent 5153aacfb8
commit 8c61282ff6
4 changed files with 41 additions and 6 deletions
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26
fs/nfs/nfs4xdr.c
View file

@ -2582,6 +2582,7 @@ static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs4_server_caps_arg *args)
{
const u32 *bitmask = args->bitmask;
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
@ -2589,11 +2590,7 @@ static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fhandle, &hdr);
encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
FATTR4_WORD0_FH_EXPIRE_TYPE|
FATTR4_WORD0_LINK_SUPPORT|
FATTR4_WORD0_SYMLINK_SUPPORT|
FATTR4_WORD0_ACLSUPPORT, &hdr);
encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
encode_nops(&hdr);
}
@ -3370,6 +3367,22 @@ out_overflow:
return -EIO;
}
static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
uint32_t *bitmap, uint32_t *bitmask)
{
if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
int ret;
ret = decode_attr_bitmap(xdr, bitmask);
if (unlikely(ret < 0))
return ret;
bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
} else
bitmask[0] = bitmask[1] = bitmask[2] = 0;
dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
bitmask[0], bitmask[1], bitmask[2]);
return 0;
}
static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
{
__be32 *p;
@ -4323,6 +4336,9 @@ static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_re
goto xdr_error;
if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
goto xdr_error;
if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
res->exclcreat_bitmask)) != 0)
goto xdr_error;
status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
dprintk("%s: xdr returned %d!\n", __func__, -status);