NFS: Get suppattr_exclcreat when getting server capabilities
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>
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index c42459e..ad8dde1 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -2582,6 +2582,7 @@
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 @@
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 @@
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 @@
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);