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Commit 8c61282f authored by Kinglong Mee's avatar Kinglong Mee Committed by Trond Myklebust
Browse files

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: default avatarKinglong Mee <kinglongmee@gmail.com>
Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
parent 5153aacf

fs/nfs/nfs4proc.c

+13 −1
Original line number Diff line number Diff line
@@ -2893,8 +2893,10 @@ static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 


static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)

{

	u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;

	struct nfs4_server_caps_arg args = {

		.fhandle = fhandle,

		.bitmask = bitmask,

	};

	struct nfs4_server_caps_res res = {};

	struct rpc_message msg = {
@@ -2904,10 +2906,18 @@ static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *f 
	};

	int status;



	bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |

		     FATTR4_WORD0_FH_EXPIRE_TYPE |

		     FATTR4_WORD0_LINK_SUPPORT |

		     FATTR4_WORD0_SYMLINK_SUPPORT |

		     FATTR4_WORD0_ACLSUPPORT;

	if (minorversion)

		bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;



	status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);

	if (status == 0) {

		/* Sanity check the server answers */

		switch (server->nfs_client->cl_minorversion) {

		switch (minorversion) {

		case 0:

			res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;

			res.attr_bitmask[2] = 0;
@@ -2960,6 +2970,8 @@ static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *f 
		server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;

		server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;

		server->cache_consistency_bitmask[2] = 0;

		memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,

			sizeof(server->exclcreat_bitmask));

		server->acl_bitmask = res.acl_bitmask;

		server->fh_expire_type = res.fh_expire_type;

	}

fs/nfs/nfs4xdr.c

+21 −5
Original line number Diff line number Diff line
@@ -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 @@ static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t * 
	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);

include/linux/nfs_fs_sb.h

+5 −0
Original line number Diff line number Diff line
@@ -173,6 +173,11 @@ struct nfs_server { 
						   set of attributes supported

						   on this filesystem excluding

						   the label support bit. */

	u32			exclcreat_bitmask[3];

						/* V4 bitmask representing the

						   set of attributes supported

						   on this filesystem for the

						   exclusive create. */

	u32			cache_consistency_bitmask[3];

						/* V4 bitmask representing the subset

						   of change attribute, size, ctime

include/linux/nfs_xdr.h

+2 −0
Original line number Diff line number Diff line
@@ -1057,11 +1057,13 @@ struct nfs4_statfs_res { 
struct nfs4_server_caps_arg {

	struct nfs4_sequence_args	seq_args;

	struct nfs_fh		       *fhandle;

	const u32 *			bitmask;

};



struct nfs4_server_caps_res {

	struct nfs4_sequence_res	seq_res;

	u32				attr_bitmask[3];

	u32				exclcreat_bitmask[3];

	u32				acl_bitmask;

	u32				has_links;

	u32				has_symlinks;