forked from luck/tmp_suning_uos_patched
NFSv4: Add support for the RELEASE_LOCKOWNER operation
This is needed by NFSv4.0 servers in order to keep the number of locking stateids at a manageable level. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
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daccbded7f
commit
d3c7b7ccc1
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@ -236,6 +236,7 @@ extern int nfs4_open_revalidate(struct inode *, struct dentry *, int, struct nam
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extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle);
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extern int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
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struct nfs4_fs_locations *fs_locations, struct page *page);
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extern void nfs4_release_lockowner(const struct nfs4_lock_state *);
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#if defined(CONFIG_NFS_V4_1)
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static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server)
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@ -4414,6 +4414,34 @@ int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
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return err;
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}
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static void nfs4_release_lockowner_release(void *calldata)
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{
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kfree(calldata);
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}
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const struct rpc_call_ops nfs4_release_lockowner_ops = {
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.rpc_release = nfs4_release_lockowner_release,
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};
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void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
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{
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struct nfs_server *server = lsp->ls_state->owner->so_server;
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struct nfs_release_lockowner_args *args;
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struct rpc_message msg = {
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.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
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};
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if (server->nfs_client->cl_mvops->minor_version != 0)
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return;
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args = kmalloc(sizeof(*args), GFP_NOFS);
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if (!args)
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return;
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args->lock_owner.clientid = server->nfs_client->cl_clientid;
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args->lock_owner.id = lsp->ls_id.id;
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msg.rpc_argp = args;
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rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
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}
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#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
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int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
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@ -701,6 +701,8 @@ void nfs4_put_lock_state(struct nfs4_lock_state *lsp)
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if (list_empty(&state->lock_states))
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clear_bit(LK_STATE_IN_USE, &state->flags);
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spin_unlock(&state->state_lock);
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if (lsp->ls_flags & NFS_LOCK_INITIALIZED)
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nfs4_release_lockowner(lsp);
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nfs4_free_lock_state(lsp);
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}
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@ -220,6 +220,11 @@ static int nfs4_stat_to_errno(int);
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4)
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#define decode_locku_maxsz (op_decode_hdr_maxsz + \
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decode_stateid_maxsz)
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#define encode_release_lockowner_maxsz \
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(op_encode_hdr_maxsz + \
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encode_lockowner_maxsz)
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#define decode_release_lockowner_maxsz \
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(op_decode_hdr_maxsz)
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#define encode_access_maxsz (op_encode_hdr_maxsz + 1)
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#define decode_access_maxsz (op_decode_hdr_maxsz + 2)
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#define encode_symlink_maxsz (op_encode_hdr_maxsz + \
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@ -474,6 +479,12 @@ static int nfs4_stat_to_errno(int);
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decode_sequence_maxsz + \
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decode_putfh_maxsz + \
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decode_locku_maxsz)
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#define NFS4_enc_release_lockowner_sz \
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(compound_encode_hdr_maxsz + \
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encode_lockowner_maxsz)
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#define NFS4_dec_release_lockowner_sz \
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(compound_decode_hdr_maxsz + \
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decode_lockowner_maxsz)
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#define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
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encode_sequence_maxsz + \
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encode_putfh_maxsz + \
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@ -1116,6 +1127,17 @@ static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *ar
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hdr->replen += decode_locku_maxsz;
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}
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static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
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{
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__be32 *p;
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p = reserve_space(xdr, 4);
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*p = cpu_to_be32(OP_RELEASE_LOCKOWNER);
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encode_lockowner(xdr, lowner);
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hdr->nops++;
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hdr->replen += decode_release_lockowner_maxsz;
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}
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static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
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{
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int len = name->len;
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@ -2056,6 +2078,20 @@ static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_
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return 0;
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}
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static int nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req, __be32 *p, struct nfs_release_lockowner_args *args)
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{
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struct xdr_stream xdr;
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struct compound_hdr hdr = {
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.minorversion = 0,
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};
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xdr_init_encode(&xdr, &req->rq_snd_buf, p);
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encode_compound_hdr(&xdr, req, &hdr);
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encode_release_lockowner(&xdr, &args->lock_owner, &hdr);
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encode_nops(&hdr);
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return 0;
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}
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/*
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* Encode a READLINK request
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*/
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@ -3981,6 +4017,11 @@ static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
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return status;
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}
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static int decode_release_lockowner(struct xdr_stream *xdr)
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{
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return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
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}
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static int decode_lookup(struct xdr_stream *xdr)
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{
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return decode_op_hdr(xdr, OP_LOOKUP);
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@ -5267,6 +5308,19 @@ static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock
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return status;
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}
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static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
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{
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struct xdr_stream xdr;
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struct compound_hdr hdr;
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int status;
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xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
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status = decode_compound_hdr(&xdr, &hdr);
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if (!status)
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status = decode_release_lockowner(&xdr);
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return status;
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}
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/*
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* Decode READLINK response
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*/
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@ -5874,6 +5928,7 @@ struct rpc_procinfo nfs4_procedures[] = {
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PROC(GETACL, enc_getacl, dec_getacl),
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PROC(SETACL, enc_setacl, dec_setacl),
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PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
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PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
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#if defined(CONFIG_NFS_V4_1)
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PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
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PROC(CREATE_SESSION, enc_create_session, dec_create_session),
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@ -523,6 +523,7 @@ enum {
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NFSPROC4_CLNT_GETACL,
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NFSPROC4_CLNT_SETACL,
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NFSPROC4_CLNT_FS_LOCATIONS,
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NFSPROC4_CLNT_RELEASE_LOCKOWNER,
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/* nfs41 */
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NFSPROC4_CLNT_EXCHANGE_ID,
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@ -315,6 +315,10 @@ struct nfs_lockt_res {
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struct nfs4_sequence_res seq_res;
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};
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struct nfs_release_lockowner_args {
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struct nfs_lowner lock_owner;
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};
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struct nfs4_delegreturnargs {
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const struct nfs_fh *fhandle;
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const nfs4_stateid *stateid;
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