diff options
author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2006-01-03 09:55:16 +0100 |
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committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2006-01-06 14:58:44 -0500 |
commit | 911d1aaf26fc4d771174d98fcab710a44e2a5fa0 (patch) | |
tree | e16df0f68093d2dc0abd5f55c2d46ff7705fffb8 /fs | |
parent | 864472e9b8fa76ffaad17dfcb84d79e16df6828c (diff) | |
download | kernel_samsung_aries-911d1aaf26fc4d771174d98fcab710a44e2a5fa0.zip kernel_samsung_aries-911d1aaf26fc4d771174d98fcab710a44e2a5fa0.tar.gz kernel_samsung_aries-911d1aaf26fc4d771174d98fcab710a44e2a5fa0.tar.bz2 |
NFSv4: locking XDR cleanup
Get rid of some unnecessary intermediate structures
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/nfs/nfs4proc.c | 192 | ||||
-rw-r--r-- | fs/nfs/nfs4xdr.c | 131 |
2 files changed, 155 insertions, 168 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 3ecb7da..8571257 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -2935,43 +2935,17 @@ nfs4_set_lock_task_retry(unsigned long timeout) return timeout; } -static inline int -nfs4_lck_type(int cmd, struct file_lock *request) -{ - /* set lock type */ - switch (request->fl_type) { - case F_RDLCK: - return IS_SETLKW(cmd) ? NFS4_READW_LT : NFS4_READ_LT; - case F_WRLCK: - return IS_SETLKW(cmd) ? NFS4_WRITEW_LT : NFS4_WRITE_LT; - case F_UNLCK: - return NFS4_WRITE_LT; - } - BUG(); - return 0; -} - -static inline uint64_t -nfs4_lck_length(struct file_lock *request) -{ - if (request->fl_end == OFFSET_MAX) - return ~(uint64_t)0; - return request->fl_end - request->fl_start + 1; -} - static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) { struct inode *inode = state->inode; struct nfs_server *server = NFS_SERVER(inode); struct nfs4_client *clp = server->nfs4_state; - struct nfs_lockargs arg = { + struct nfs_lockt_args arg = { .fh = NFS_FH(inode), - .type = nfs4_lck_type(cmd, request), - .offset = request->fl_start, - .length = nfs4_lck_length(request), + .fl = request, }; - struct nfs_lockres res = { - .server = server, + struct nfs_lockt_res res = { + .denied = request, }; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], @@ -2979,36 +2953,23 @@ static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock .rpc_resp = &res, .rpc_cred = state->owner->so_cred, }; - struct nfs_lowner nlo; struct nfs4_lock_state *lsp; int status; down_read(&clp->cl_sem); - nlo.clientid = clp->cl_clientid; + arg.lock_owner.clientid = clp->cl_clientid; status = nfs4_set_lock_state(state, request); if (status != 0) goto out; lsp = request->fl_u.nfs4_fl.owner; - nlo.id = lsp->ls_id; - arg.u.lockt = &nlo; + arg.lock_owner.id = lsp->ls_id; status = rpc_call_sync(server->client, &msg, 0); - if (!status) { - request->fl_type = F_UNLCK; - } else if (status == -NFS4ERR_DENIED) { - int64_t len, start, end; - start = res.u.denied.offset; - len = res.u.denied.length; - end = start + len - 1; - if (end < 0 || len == 0) - request->fl_end = OFFSET_MAX; - else - request->fl_end = (loff_t)end; - request->fl_start = (loff_t)start; - request->fl_type = F_WRLCK; - if (res.u.denied.type & 1) - request->fl_type = F_RDLCK; - request->fl_pid = 0; - status = 0; + switch (status) { + case 0: + request->fl_type = F_UNLCK; + break; + case -NFS4ERR_DENIED: + status = 0; } out: up_read(&clp->cl_sem); @@ -3048,17 +3009,42 @@ static int do_vfs_lock(struct file *file, struct file_lock *fl) } struct nfs4_unlockdata { - struct nfs_lockargs arg; - struct nfs_locku_opargs luargs; - struct nfs_lockres res; + struct nfs_locku_args arg; + struct nfs_locku_res res; struct nfs4_lock_state *lsp; struct nfs_open_context *ctx; + struct file_lock fl; + const struct nfs_server *server; }; +static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, + struct nfs_open_context *ctx, + struct nfs4_lock_state *lsp, + struct nfs_seqid *seqid) +{ + struct nfs4_unlockdata *p; + struct inode *inode = lsp->ls_state->inode; + + p = kmalloc(sizeof(*p), GFP_KERNEL); + if (p == NULL) + return NULL; + p->arg.fh = NFS_FH(inode); + p->arg.fl = &p->fl; + p->arg.seqid = seqid; + p->arg.stateid = &lsp->ls_stateid; + p->lsp = lsp; + atomic_inc(&lsp->ls_count); + /* Ensure we don't close file until we're done freeing locks! */ + p->ctx = get_nfs_open_context(ctx); + memcpy(&p->fl, fl, sizeof(p->fl)); + p->server = NFS_SERVER(inode); + return p; +} + static void nfs4_locku_release_calldata(void *data) { struct nfs4_unlockdata *calldata = data; - nfs_free_seqid(calldata->luargs.seqid); + nfs_free_seqid(calldata->arg.seqid); nfs4_put_lock_state(calldata->lsp); put_nfs_open_context(calldata->ctx); kfree(calldata); @@ -3070,19 +3056,19 @@ static void nfs4_locku_done(struct rpc_task *task, void *data) if (RPC_ASSASSINATED(task)) return; - nfs_increment_lock_seqid(task->tk_status, calldata->luargs.seqid); + nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid); switch (task->tk_status) { case 0: memcpy(calldata->lsp->ls_stateid.data, - calldata->res.u.stateid.data, + calldata->res.stateid.data, sizeof(calldata->lsp->ls_stateid.data)); break; case -NFS4ERR_STALE_STATEID: case -NFS4ERR_EXPIRED: - nfs4_schedule_state_recovery(calldata->res.server->nfs4_state); + nfs4_schedule_state_recovery(calldata->server->nfs4_state); break; default: - if (nfs4_async_handle_error(task, calldata->res.server) == -EAGAIN) { + if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) { rpc_restart_call(task); } } @@ -3097,10 +3083,8 @@ static void nfs4_locku_prepare(struct rpc_task *task, void *data) .rpc_resp = &calldata->res, .rpc_cred = calldata->lsp->ls_state->owner->so_cred, }; - int status; - status = nfs_wait_on_sequence(calldata->luargs.seqid, task); - if (status != 0) + if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) return; if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { /* Note: exit _without_ running nfs4_locku_done */ @@ -3121,43 +3105,32 @@ static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock * struct nfs4_unlockdata *calldata; struct inode *inode = state->inode; struct nfs_server *server = NFS_SERVER(inode); + struct nfs_seqid *seqid; struct nfs4_lock_state *lsp; struct rpc_task *task; int status = 0; /* Is this a delegated lock? */ if (test_bit(NFS_DELEGATED_STATE, &state->flags)) - goto out; + goto out_unlock; + /* Is this open_owner holding any locks on the server? */ + if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) + goto out_unlock; status = nfs4_set_lock_state(state, request); if (status != 0) - goto out; + goto out_unlock; lsp = request->fl_u.nfs4_fl.owner; - /* We might have lost the locks! */ - if ((lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) - goto out; status = -ENOMEM; - calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); + seqid = nfs_alloc_seqid(&lsp->ls_seqid); + if (seqid == NULL) + goto out_unlock; + calldata = nfs4_alloc_unlockdata(request, request->fl_file->private_data, + lsp, seqid); if (calldata == NULL) - goto out; - calldata->luargs.seqid = nfs_alloc_seqid(&lsp->ls_seqid); - if (calldata->luargs.seqid == NULL) { - kfree(calldata); - goto out; - } - calldata->luargs.stateid = &lsp->ls_stateid; - calldata->arg.fh = NFS_FH(inode); - calldata->arg.type = nfs4_lck_type(cmd, request); - calldata->arg.offset = request->fl_start; - calldata->arg.length = nfs4_lck_length(request); - calldata->arg.u.locku = &calldata->luargs; - calldata->res.server = server; - calldata->lsp = lsp; - atomic_inc(&lsp->ls_count); - - /* Ensure we don't close file until we're done freeing locks! */ - calldata->ctx = get_nfs_open_context((struct nfs_open_context*)request->fl_file->private_data); - + goto out_free_seqid; + /* Unlock _before_ we do the RPC call */ + do_vfs_lock(request->fl_file, request); task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_locku_ops, calldata); if (!IS_ERR(task)) { status = nfs4_wait_for_completion_rpc_task(task); @@ -3166,7 +3139,10 @@ static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock * status = PTR_ERR(task); nfs4_locku_release_calldata(calldata); } -out: + return status; +out_free_seqid: + nfs_free_seqid(seqid); +out_unlock: do_vfs_lock(request->fl_file, request); return status; } @@ -3176,27 +3152,19 @@ static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *r struct inode *inode = state->inode; struct nfs_server *server = NFS_SERVER(inode); struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; - struct nfs_lock_opargs largs = { + struct nfs_lock_args arg = { + .fh = NFS_FH(inode), + .fl = request, .lock_stateid = &lsp->ls_stateid, .open_stateid = &state->stateid, .lock_owner = { .clientid = server->nfs4_state->cl_clientid, .id = lsp->ls_id, }, + .block = (IS_SETLKW(cmd)) ? 1 : 0, .reclaim = reclaim, }; - struct nfs_lockargs arg = { - .fh = NFS_FH(inode), - .type = nfs4_lck_type(cmd, request), - .offset = request->fl_start, - .length = nfs4_lck_length(request), - .u = { - .lock = &largs, - }, - }; - struct nfs_lockres res = { - .server = server, - }; + struct nfs_lock_res res; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], .rpc_argp = &arg, @@ -3205,37 +3173,37 @@ static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *r }; int status = -ENOMEM; - largs.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); - if (largs.lock_seqid == NULL) + arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); + if (arg.lock_seqid == NULL) return -ENOMEM; if (!(lsp->ls_seqid.flags & NFS_SEQID_CONFIRMED)) { struct nfs4_state_owner *owner = state->owner; - largs.open_seqid = nfs_alloc_seqid(&owner->so_seqid); - if (largs.open_seqid == NULL) + arg.open_seqid = nfs_alloc_seqid(&owner->so_seqid); + if (arg.open_seqid == NULL) goto out; - largs.new_lock_owner = 1; + arg.new_lock_owner = 1; status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); /* increment open seqid on success, and seqid mutating errors */ - if (largs.new_lock_owner != 0) { - nfs_increment_open_seqid(status, largs.open_seqid); + if (arg.new_lock_owner != 0) { + nfs_increment_open_seqid(status, arg.open_seqid); if (status == 0) nfs_confirm_seqid(&lsp->ls_seqid, 0); } - nfs_free_seqid(largs.open_seqid); + nfs_free_seqid(arg.open_seqid); } else status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); /* increment lock seqid on success, and seqid mutating errors*/ - nfs_increment_lock_seqid(status, largs.lock_seqid); + nfs_increment_lock_seqid(status, arg.lock_seqid); /* save the returned stateid. */ if (status == 0) { - memcpy(lsp->ls_stateid.data, res.u.stateid.data, + memcpy(lsp->ls_stateid.data, res.stateid.data, sizeof(lsp->ls_stateid.data)); lsp->ls_flags |= NFS_LOCK_INITIALIZED; } else if (status == -NFS4ERR_DENIED) status = -EAGAIN; out: - nfs_free_seqid(largs.lock_seqid); + nfs_free_seqid(arg.lock_seqid); return status; } diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 3100172..a7b5de8 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -742,69 +742,80 @@ static int encode_link(struct xdr_stream *xdr, const struct qstr *name) return 0; } +static inline int nfs4_lock_type(struct file_lock *fl, int block) +{ + if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK) + return block ? NFS4_READW_LT : NFS4_READ_LT; + return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT; +} + +static inline uint64_t nfs4_lock_length(struct file_lock *fl) +{ + if (fl->fl_end == OFFSET_MAX) + return ~(uint64_t)0; + return fl->fl_end - fl->fl_start + 1; +} + /* * opcode,type,reclaim,offset,length,new_lock_owner = 32 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40 */ -static int encode_lock(struct xdr_stream *xdr, const struct nfs_lockargs *arg) +static int encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args) { uint32_t *p; - struct nfs_lock_opargs *opargs = arg->u.lock; RESERVE_SPACE(32); WRITE32(OP_LOCK); - WRITE32(arg->type); - WRITE32(opargs->reclaim); - WRITE64(arg->offset); - WRITE64(arg->length); - WRITE32(opargs->new_lock_owner); - if (opargs->new_lock_owner){ + WRITE32(nfs4_lock_type(args->fl, args->block)); + WRITE32(args->reclaim); + WRITE64(args->fl->fl_start); + WRITE64(nfs4_lock_length(args->fl)); + WRITE32(args->new_lock_owner); + if (args->new_lock_owner){ RESERVE_SPACE(40); - WRITE32(opargs->open_seqid->sequence->counter); - WRITEMEM(opargs->open_stateid->data, sizeof(opargs->open_stateid->data)); - WRITE32(opargs->lock_seqid->sequence->counter); - WRITE64(opargs->lock_owner.clientid); + WRITE32(args->open_seqid->sequence->counter); + WRITEMEM(args->open_stateid->data, sizeof(args->open_stateid->data)); + WRITE32(args->lock_seqid->sequence->counter); + WRITE64(args->lock_owner.clientid); WRITE32(4); - WRITE32(opargs->lock_owner.id); + WRITE32(args->lock_owner.id); } else { RESERVE_SPACE(20); - WRITEMEM(opargs->lock_stateid->data, sizeof(opargs->lock_stateid->data)); - WRITE32(opargs->lock_seqid->sequence->counter); + WRITEMEM(args->lock_stateid->data, sizeof(args->lock_stateid->data)); + WRITE32(args->lock_seqid->sequence->counter); } return 0; } -static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockargs *arg) +static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args) { uint32_t *p; - struct nfs_lowner *opargs = arg->u.lockt; RESERVE_SPACE(40); WRITE32(OP_LOCKT); - WRITE32(arg->type); - WRITE64(arg->offset); - WRITE64(arg->length); - WRITE64(opargs->clientid); + WRITE32(nfs4_lock_type(args->fl, 0)); + WRITE64(args->fl->fl_start); + WRITE64(nfs4_lock_length(args->fl)); + WRITE64(args->lock_owner.clientid); WRITE32(4); - WRITE32(opargs->id); + WRITE32(args->lock_owner.id); return 0; } -static int encode_locku(struct xdr_stream *xdr, const struct nfs_lockargs *arg) +static int encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args) { uint32_t *p; - struct nfs_locku_opargs *opargs = arg->u.locku; RESERVE_SPACE(44); WRITE32(OP_LOCKU); - WRITE32(arg->type); - WRITE32(opargs->seqid->sequence->counter); - WRITEMEM(opargs->stateid->data, sizeof(opargs->stateid->data)); - WRITE64(arg->offset); - WRITE64(arg->length); + WRITE32(nfs4_lock_type(args->fl, 0)); + WRITE32(args->seqid->sequence->counter); + WRITEMEM(args->stateid->data, sizeof(args->stateid->data)); + WRITE64(args->fl->fl_start); + WRITE64(nfs4_lock_length(args->fl)); return 0; } @@ -1596,21 +1607,20 @@ out: /* * Encode a LOCK request */ -static int nfs4_xdr_enc_lock(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args) +static int nfs4_xdr_enc_lock(struct rpc_rqst *req, uint32_t *p, struct nfs_lock_args *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .nops = 2, }; - struct nfs_lock_opargs *opargs = args->u.lock; int status; - status = nfs_wait_on_sequence(opargs->lock_seqid, req->rq_task); + status = nfs_wait_on_sequence(args->lock_seqid, req->rq_task); if (status != 0) goto out; /* Do we need to do an open_to_lock_owner? */ - if (opargs->lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED) - opargs->new_lock_owner = 0; + if (args->lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED) + args->new_lock_owner = 0; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, &hdr); status = encode_putfh(&xdr, args->fh); @@ -1624,7 +1634,7 @@ out: /* * Encode a LOCKT request */ -static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args) +static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, uint32_t *p, struct nfs_lockt_args *args) { struct xdr_stream xdr; struct compound_hdr hdr = { @@ -1645,7 +1655,7 @@ out: /* * Encode a LOCKU request */ -static int nfs4_xdr_enc_locku(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args) +static int nfs4_xdr_enc_locku(struct rpc_rqst *req, uint32_t *p, struct nfs_locku_args *args) { struct xdr_stream xdr; struct compound_hdr hdr = { @@ -2949,55 +2959,64 @@ static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo) /* * We create the owner, so we know a proper owner.id length is 4. */ -static int decode_lock_denied (struct xdr_stream *xdr, struct nfs_lock_denied *denied) +static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl) { + uint64_t offset, length, clientid; uint32_t *p; - uint32_t namelen; + uint32_t namelen, type; READ_BUF(32); - READ64(denied->offset); - READ64(denied->length); - READ32(denied->type); - READ64(denied->owner.clientid); + READ64(offset); + READ64(length); + READ32(type); + if (fl != NULL) { + fl->fl_start = (loff_t)offset; + fl->fl_end = fl->fl_start + (loff_t)length - 1; + if (length == ~(uint64_t)0) + fl->fl_end = OFFSET_MAX; + fl->fl_type = F_WRLCK; + if (type & 1) + fl->fl_type = F_RDLCK; + fl->fl_pid = 0; + } + READ64(clientid); READ32(namelen); READ_BUF(namelen); - if (namelen == 4) - READ32(denied->owner.id); return -NFS4ERR_DENIED; } -static int decode_lock(struct xdr_stream *xdr, struct nfs_lockres *res) +static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res) { uint32_t *p; int status; status = decode_op_hdr(xdr, OP_LOCK); if (status == 0) { - READ_BUF(sizeof(res->u.stateid.data)); - COPYMEM(res->u.stateid.data, sizeof(res->u.stateid.data)); + READ_BUF(sizeof(res->stateid.data)); + COPYMEM(res->stateid.data, sizeof(res->stateid.data)); } else if (status == -NFS4ERR_DENIED) - return decode_lock_denied(xdr, &res->u.denied); + return decode_lock_denied(xdr, NULL); return status; } -static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockres *res) +static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res) { int status; status = decode_op_hdr(xdr, OP_LOCKT); if (status == -NFS4ERR_DENIED) - return decode_lock_denied(xdr, &res->u.denied); + return decode_lock_denied(xdr, res->denied); return status; } -static int decode_locku(struct xdr_stream *xdr, struct nfs_lockres *res) +static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res) { uint32_t *p; int status; status = decode_op_hdr(xdr, OP_LOCKU); if (status == 0) { - READ_BUF(sizeof(res->u.stateid.data)); - COPYMEM(res->u.stateid.data, sizeof(res->u.stateid.data)); + READ_BUF(sizeof(res->stateid.data)); + COPYMEM(res->stateid.data, sizeof(res->stateid.data)); } return status; } @@ -3861,7 +3880,7 @@ out: /* * Decode LOCK response */ -static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res) +static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lock_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; @@ -3882,7 +3901,7 @@ out: /* * Decode LOCKT response */ -static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res) +static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockt_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; @@ -3903,7 +3922,7 @@ out: /* * Decode LOCKU response */ -static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res) +static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_locku_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; |