#define NFS4_POLL_RETRY_MIN (1*HZ)
#define NFS4_POLL_RETRY_MAX (15*HZ)
+static int _nfs4_proc_open_confirm(struct rpc_clnt *clnt, const struct nfs_fh *fh, struct nfs4_state_owner *sp, nfs4_stateid *stateid, struct nfs_seqid *seqid);
static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
-static int nfs4_async_handle_error(struct rpc_task *, struct nfs_server *);
+static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
-static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
+static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus);
extern struct rpc_procinfo nfs4_procedures[];
nfsi->change_attr = cinfo->after;
}
+/* Helper for asynchronous RPC calls */
+static int nfs4_call_async(struct rpc_clnt *clnt, rpc_action tk_begin,
+ rpc_action tk_exit, void *calldata)
+{
+ struct rpc_task *task;
+
+ if (!(task = rpc_new_task(clnt, tk_exit, RPC_TASK_ASYNC)))
+ return -ENOMEM;
+
+ task->tk_calldata = calldata;
+ task->tk_action = tk_begin;
+ rpc_execute(task);
+ return 0;
+}
+
static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
{
struct inode *inode = state->inode;
/*
* OPEN_RECLAIM:
* reclaim state on the server after a reboot.
- * Assumes caller is holding the sp->so_sem
*/
static int _nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
{
};
int status = 0;
- down(&sp->so_sema);
if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
goto out;
if (state->state == 0)
memcpy(arg.u.delegation.data, state->stateid.data, sizeof(arg.u.delegation.data));
status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
nfs_increment_open_seqid(status, arg.seqid);
+ if (status != 0)
+ goto out_free;
+ if(res.rflags & NFS4_OPEN_RESULT_CONFIRM) {
+ status = _nfs4_proc_open_confirm(server->client, NFS_FH(inode),
+ sp, &res.stateid, arg.seqid);
+ if (status != 0)
+ goto out_free;
+ }
+ nfs_confirm_seqid(&sp->so_seqid, 0);
if (status >= 0) {
memcpy(state->stateid.data, res.stateid.data,
sizeof(state->stateid.data));
clear_bit(NFS_DELEGATED_STATE, &state->flags);
}
+out_free:
nfs_free_seqid(arg.seqid);
out:
- up(&sp->so_sema);
dput(parent);
return status;
}
return err;
}
-static inline int _nfs4_proc_open_confirm(struct rpc_clnt *clnt, const struct nfs_fh *fh, struct nfs4_state_owner *sp, nfs4_stateid *stateid, struct nfs_seqid *seqid)
+static int _nfs4_proc_open_confirm(struct rpc_clnt *clnt, const struct nfs_fh *fh, struct nfs4_state_owner *sp, nfs4_stateid *stateid, struct nfs_seqid *seqid)
{
struct nfs_open_confirmargs arg = {
.fh = fh,
dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
goto out_err;
}
- down(&sp->so_sema);
state = nfs4_get_open_state(inode, sp);
if (state == NULL)
goto out_err;
set_bit(NFS_DELEGATED_STATE, &state->flags);
update_open_stateid(state, &delegation->stateid, open_flags);
out_ok:
- up(&sp->so_sema);
nfs4_put_state_owner(sp);
up_read(&nfsi->rwsem);
up_read(&clp->cl_sem);
if (sp != NULL) {
if (state != NULL)
nfs4_put_open_state(state);
- up(&sp->so_sema);
nfs4_put_state_owner(sp);
}
up_read(&nfsi->rwsem);
} else
o_arg.u.attrs = sattr;
/* Serialization for the sequence id */
- down(&sp->so_sema);
o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
if (o_arg.seqid == NULL)
if (o_res.delegation_type != 0)
nfs_inode_set_delegation(inode, cred, &o_res);
nfs_free_seqid(o_arg.seqid);
- up(&sp->so_sema);
nfs4_put_state_owner(sp);
up_read(&clp->cl_sem);
*res = state;
if (state != NULL)
nfs4_put_open_state(state);
nfs_free_seqid(o_arg.seqid);
- up(&sp->so_sema);
nfs4_put_state_owner(sp);
}
/* Note: clp->cl_sem must be released before nfs4_put_open_state()! */
struct nfs_closeres res;
};
+static void nfs4_free_closedata(struct nfs4_closedata *calldata)
+{
+ struct nfs4_state *state = calldata->state;
+ struct nfs4_state_owner *sp = state->owner;
+
+ nfs4_put_open_state(calldata->state);
+ nfs_free_seqid(calldata->arg.seqid);
+ nfs4_put_state_owner(sp);
+ kfree(calldata);
+}
+
static void nfs4_close_done(struct rpc_task *task)
{
struct nfs4_closedata *calldata = (struct nfs4_closedata *)task->tk_calldata;
struct nfs4_state *state = calldata->state;
- struct nfs4_state_owner *sp = state->owner;
struct nfs_server *server = NFS_SERVER(calldata->inode);
/* hmm. we are done with the inode, and in the process of freeing
}
}
state->state = calldata->arg.open_flags;
- nfs4_put_open_state(state);
- nfs_free_seqid(calldata->arg.seqid);
- up(&sp->so_sema);
- nfs4_put_state_owner(sp);
- up_read(&server->nfs4_state->cl_sem);
- kfree(calldata);
+ nfs4_free_closedata(calldata);
}
-static inline int nfs4_close_call(struct rpc_clnt *clnt, struct nfs4_closedata *calldata)
+static void nfs4_close_begin(struct rpc_task *task)
{
+ struct nfs4_closedata *calldata = (struct nfs4_closedata *)task->tk_calldata;
+ struct nfs4_state *state = calldata->state;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
.rpc_argp = &calldata->arg,
.rpc_resp = &calldata->res,
- .rpc_cred = calldata->state->owner->so_cred,
+ .rpc_cred = state->owner->so_cred,
};
- if (calldata->arg.open_flags != 0)
+ int mode = 0;
+ int status;
+
+ status = nfs_wait_on_sequence(calldata->arg.seqid, task);
+ if (status != 0)
+ return;
+ /* Don't reorder reads */
+ smp_rmb();
+ /* Recalculate the new open mode in case someone reopened the file
+ * while we were waiting in line to be scheduled.
+ */
+ if (state->nreaders != 0)
+ mode |= FMODE_READ;
+ if (state->nwriters != 0)
+ mode |= FMODE_WRITE;
+ if (test_bit(NFS_DELEGATED_STATE, &state->flags))
+ state->state = mode;
+ if (mode == state->state) {
+ nfs4_free_closedata(calldata);
+ task->tk_exit = NULL;
+ rpc_exit(task, 0);
+ return;
+ }
+ if (mode != 0)
msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
- return rpc_call_async(clnt, &msg, 0, nfs4_close_done, calldata);
+ calldata->arg.open_flags = mode;
+ rpc_call_setup(task, &msg, 0);
}
/*
int nfs4_do_close(struct inode *inode, struct nfs4_state *state, mode_t mode)
{
struct nfs4_closedata *calldata;
- int status;
+ int status = -ENOMEM;
- /* Tell caller we're done */
- if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
- state->state = mode;
- return 0;
- }
- calldata = (struct nfs4_closedata *)kmalloc(sizeof(*calldata), GFP_KERNEL);
+ calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
if (calldata == NULL)
- return -ENOMEM;
+ goto out;
calldata->inode = inode;
calldata->state = state;
calldata->arg.fh = NFS_FH(inode);
+ calldata->arg.stateid = &state->stateid;
/* Serialization for the sequence id */
calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
- if (calldata->arg.seqid == NULL) {
- kfree(calldata);
- return -ENOMEM;
- }
- calldata->arg.open_flags = mode;
- memcpy(&calldata->arg.stateid, &state->stateid,
- sizeof(calldata->arg.stateid));
- status = nfs4_close_call(NFS_SERVER(inode)->client, calldata);
- /*
- * Return -EINPROGRESS on success in order to indicate to the
- * caller that an asynchronous RPC call has been launched, and
- * that it will release the semaphores on completion.
- */
- return (status == 0) ? -EINPROGRESS : status;
+ if (calldata->arg.seqid == NULL)
+ goto out_free_calldata;
+
+ status = nfs4_call_async(NFS_SERVER(inode)->client, nfs4_close_begin,
+ nfs4_close_done, calldata);
+ if (status == 0)
+ goto out;
+
+ nfs_free_seqid(calldata->arg.seqid);
+out_free_calldata:
+ kfree(calldata);
+out:
+ return status;
}
struct inode *
}
static int
-nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server)
+nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
{
struct nfs4_client *clp = server->nfs4_state;
/* This is the error handling routine for processes that are allowed
* to sleep.
*/
-int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
+int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
{
struct nfs4_client *clp = server->nfs4_state;
int ret = errorcode;
down_read(&clp->cl_sem);
nlo.clientid = clp->cl_clientid;
- down(&state->lock_sema);
status = nfs4_set_lock_state(state, request);
if (status != 0)
goto out;
status = 0;
}
out:
- up(&state->lock_sema);
up_read(&clp->cl_sem);
return status;
}
return res;
}
-static int _nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
+struct nfs4_unlockdata {
+ struct nfs_lockargs arg;
+ struct nfs_locku_opargs luargs;
+ struct nfs_lockres res;
+ struct nfs4_lock_state *lsp;
+ struct nfs_open_context *ctx;
+ atomic_t refcount;
+ struct completion completion;
+};
+
+static void nfs4_locku_release_calldata(struct nfs4_unlockdata *calldata)
{
- struct inode *inode = state->inode;
- struct nfs_server *server = NFS_SERVER(inode);
- struct nfs4_client *clp = server->nfs4_state;
- struct nfs_lockargs arg = {
- .fh = NFS_FH(inode),
- .type = nfs4_lck_type(cmd, request),
- .offset = request->fl_start,
- .length = nfs4_lck_length(request),
- };
- struct nfs_lockres res = {
- .server = server,
- };
+ if (atomic_dec_and_test(&calldata->refcount)) {
+ nfs_free_seqid(calldata->luargs.seqid);
+ nfs4_put_lock_state(calldata->lsp);
+ put_nfs_open_context(calldata->ctx);
+ kfree(calldata);
+ }
+}
+
+static void nfs4_locku_complete(struct nfs4_unlockdata *calldata)
+{
+ complete(&calldata->completion);
+ nfs4_locku_release_calldata(calldata);
+}
+
+static void nfs4_locku_done(struct rpc_task *task)
+{
+ struct nfs4_unlockdata *calldata = (struct nfs4_unlockdata *)task->tk_calldata;
+
+ nfs_increment_lock_seqid(task->tk_status, calldata->luargs.seqid);
+ switch (task->tk_status) {
+ case 0:
+ memcpy(calldata->lsp->ls_stateid.data,
+ calldata->res.u.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);
+ break;
+ default:
+ if (nfs4_async_handle_error(task, calldata->res.server) == -EAGAIN) {
+ rpc_restart_call(task);
+ return;
+ }
+ }
+ nfs4_locku_complete(calldata);
+}
+
+static void nfs4_locku_begin(struct rpc_task *task)
+{
+ struct nfs4_unlockdata *calldata = (struct nfs4_unlockdata *)task->tk_calldata;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
- .rpc_argp = &arg,
- .rpc_resp = &res,
- .rpc_cred = state->owner->so_cred,
+ .rpc_argp = &calldata->arg,
+ .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)
+ return;
+ if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
+ nfs4_locku_complete(calldata);
+ task->tk_exit = NULL;
+ rpc_exit(task, 0);
+ return;
+ }
+ rpc_call_setup(task, &msg, 0);
+}
+
+static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
+{
+ struct nfs4_unlockdata *calldata;
+ struct inode *inode = state->inode;
+ struct nfs_server *server = NFS_SERVER(inode);
struct nfs4_lock_state *lsp;
- struct nfs_locku_opargs luargs;
int status;
-
- down_read(&clp->cl_sem);
- down(&state->lock_sema);
+
status = nfs4_set_lock_state(state, request);
if (status != 0)
- goto out;
+ return status;
lsp = request->fl_u.nfs4_fl.owner;
/* We might have lost the locks! */
if ((lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0)
- goto out;
- luargs.seqid = nfs_alloc_seqid(&lsp->ls_seqid);
- status = -ENOMEM;
- if (luargs.seqid == NULL)
- goto out;
- memcpy(luargs.stateid.data, lsp->ls_stateid.data, sizeof(luargs.stateid.data));
- arg.u.locku = &luargs;
- status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
- nfs_increment_lock_seqid(status, luargs.seqid);
-
- if (status == 0)
- memcpy(lsp->ls_stateid.data, res.u.stateid.data,
- sizeof(lsp->ls_stateid.data));
- nfs_free_seqid(luargs.seqid);
-out:
- up(&state->lock_sema);
+ return 0;
+ calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
+ if (calldata == NULL)
+ return -ENOMEM;
+ calldata->luargs.seqid = nfs_alloc_seqid(&lsp->ls_seqid);
+ if (calldata->luargs.seqid == NULL) {
+ kfree(calldata);
+ return -ENOMEM;
+ }
+ 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);
+
+ atomic_set(&calldata->refcount, 2);
+ init_completion(&calldata->completion);
+
+ status = nfs4_call_async(NFS_SERVER(inode)->client, nfs4_locku_begin,
+ nfs4_locku_done, calldata);
if (status == 0)
- do_vfs_lock(request->fl_file, request);
- up_read(&clp->cl_sem);
+ wait_for_completion_interruptible(&calldata->completion);
+ do_vfs_lock(request->fl_file, request);
+ nfs4_locku_release_calldata(calldata);
return status;
}
-static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
-{
- struct nfs4_exception exception = { };
- int err;
-
- do {
- err = nfs4_handle_exception(NFS_SERVER(state->inode),
- _nfs4_proc_unlck(state, cmd, request),
- &exception);
- } while (exception.retry);
- return err;
-}
-
static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *request, int reclaim)
{
struct inode *inode = state->inode;
largs.u.open_lock = &otl;
largs.new_lock_owner = 1;
arg.u.lock = &largs;
- down(&owner->so_sema);
otl.open_seqid = nfs_alloc_seqid(&owner->so_seqid);
if (otl.open_seqid != NULL) {
status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
nfs_increment_open_seqid(status, otl.open_seqid);
nfs_free_seqid(otl.open_seqid);
}
- up(&owner->so_sema);
if (status == 0)
nfs_confirm_seqid(&lsp->ls_seqid, 0);
} else {
int status;
down_read(&clp->cl_sem);
- down(&state->lock_sema);
status = nfs4_set_lock_state(state, request);
if (status == 0)
status = _nfs4_do_setlk(state, cmd, request, 0);
- up(&state->lock_sema);
if (status == 0) {
/* Note: we always want to sleep here! */
request->fl_flags |= FL_SLEEP;
projects / linux-2.6-block.git / blobdiff