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| author | Trond Myklebust <trond.myklebust@primarydata.com> | 2024-06-17 04:21:32 +0300 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2024-07-08 20:47:25 +0300 |
| commit | 707f13b3d081ea811c40014e7b61f2c487ee9a4f (patch) | |
| tree | d925f3e377dd131de440ee8ee32941b58485bef3 /fs/nfs/nfs4xdr.c | |
| parent | 32215c1f893a11c5b0c6e1d70907cb40b54925ab (diff) | |
| download | linux-707f13b3d081ea811c40014e7b61f2c487ee9a4f.tar.xz | |
NFSv4: Add support for the FATTR4_OPEN_ARGUMENTS attribute
Query the server for the OPEN arguments that it supports so that
we can figure out which extensions we can use.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Lance Shelton <lance.shelton@hammerspace.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs/nfs/nfs4xdr.c')
| -rw-r--r-- | fs/nfs/nfs4xdr.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index e160a275ad4a..98aab2c324c9 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -4337,6 +4337,28 @@ static int decode_attr_xattrsupport(struct xdr_stream *xdr, uint32_t *bitmap, return 0; } +static int decode_attr_open_arguments(struct xdr_stream *xdr, uint32_t *bitmap, + struct nfs4_open_caps *res) +{ + memset(res, 0, sizeof(*res)); + if (unlikely(bitmap[2] & (FATTR4_WORD2_OPEN_ARGUMENTS - 1U))) + return -EIO; + if (likely(bitmap[2] & FATTR4_WORD2_OPEN_ARGUMENTS)) { + if (decode_bitmap4(xdr, res->oa_share_access, ARRAY_SIZE(res->oa_share_access)) < 0) + return -EIO; + if (decode_bitmap4(xdr, res->oa_share_deny, ARRAY_SIZE(res->oa_share_deny)) < 0) + return -EIO; + if (decode_bitmap4(xdr, res->oa_share_access_want, ARRAY_SIZE(res->oa_share_access_want)) < 0) + return -EIO; + if (decode_bitmap4(xdr, res->oa_open_claim, ARRAY_SIZE(res->oa_open_claim)) < 0) + return -EIO; + if (decode_bitmap4(xdr, res->oa_createmode, ARRAY_SIZE(res->oa_createmode)) < 0) + return -EIO; + bitmap[2] &= ~FATTR4_WORD2_OPEN_ARGUMENTS; + } + return 0; +} + static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen) { unsigned int attrwords = XDR_QUADLEN(attrlen); @@ -4511,6 +4533,8 @@ static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_re if ((status = decode_attr_exclcreat_supported(xdr, bitmap, res->exclcreat_bitmask)) != 0) goto xdr_error; + if ((status = decode_attr_open_arguments(xdr, bitmap, &res->open_caps)) != 0) + goto xdr_error; status = verify_attr_len(xdr, savep, attrlen); xdr_error: dprintk("%s: xdr returned %d!\n", __func__, -status); |