diff options
Diffstat (limited to 'fs/nfs')
| -rw-r--r-- | fs/nfs/client.c | 5 | ||||
| -rw-r--r-- | fs/nfs/delegation.c | 86 | ||||
| -rw-r--r-- | fs/nfs/dir.c | 6 | ||||
| -rw-r--r-- | fs/nfs/inode.c | 8 | ||||
| -rw-r--r-- | fs/nfs/nfs4proc.c | 12 | ||||
| -rw-r--r-- | fs/nfs/super.c | 3 | ||||
| -rw-r--r-- | fs/nfs/write.c | 95 |
7 files changed, 135 insertions, 80 deletions
diff --git a/fs/nfs/client.c b/fs/nfs/client.c index 2a3d352c0bf..acc9c4943b8 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -966,6 +966,8 @@ out_error: static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) { target->flags = source->flags; + target->rsize = source->rsize; + target->wsize = source->wsize; target->acregmin = source->acregmin; target->acregmax = source->acregmax; target->acdirmin = source->acdirmin; @@ -1294,7 +1296,8 @@ static int nfs4_init_server(struct nfs_server *server, /* Initialise the client representation from the mount data */ server->flags = data->flags; - server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR; + server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR| + NFS_CAP_POSIX_LOCK; server->options = data->options; /* Get a client record */ diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c index 15671245c6e..ea61d26e787 100644 --- a/fs/nfs/delegation.c +++ b/fs/nfs/delegation.c @@ -24,6 +24,8 @@ static void nfs_do_free_delegation(struct nfs_delegation *delegation) { + if (delegation->cred) + put_rpccred(delegation->cred); kfree(delegation); } @@ -36,13 +38,7 @@ static void nfs_free_delegation_callback(struct rcu_head *head) static void nfs_free_delegation(struct nfs_delegation *delegation) { - struct rpc_cred *cred; - - cred = rcu_dereference(delegation->cred); - rcu_assign_pointer(delegation->cred, NULL); call_rcu(&delegation->rcu, nfs_free_delegation_callback); - if (cred) - put_rpccred(cred); } void nfs_mark_delegation_referenced(struct nfs_delegation *delegation) @@ -129,21 +125,35 @@ again: */ void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res) { - struct nfs_delegation *delegation = NFS_I(inode)->delegation; - struct rpc_cred *oldcred; + struct nfs_delegation *delegation; + struct rpc_cred *oldcred = NULL; - if (delegation == NULL) - return; - memcpy(delegation->stateid.data, res->delegation.data, - sizeof(delegation->stateid.data)); - delegation->type = res->delegation_type; - delegation->maxsize = res->maxsize; - oldcred = delegation->cred; - delegation->cred = get_rpccred(cred); - clear_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags); - NFS_I(inode)->delegation_state = delegation->type; - smp_wmb(); - put_rpccred(oldcred); + rcu_read_lock(); + delegation = rcu_dereference(NFS_I(inode)->delegation); + if (delegation != NULL) { + spin_lock(&delegation->lock); + if (delegation->inode != NULL) { + memcpy(delegation->stateid.data, res->delegation.data, + sizeof(delegation->stateid.data)); + delegation->type = res->delegation_type; + delegation->maxsize = res->maxsize; + oldcred = delegation->cred; + delegation->cred = get_rpccred(cred); + clear_bit(NFS_DELEGATION_NEED_RECLAIM, + &delegation->flags); + NFS_I(inode)->delegation_state = delegation->type; + spin_unlock(&delegation->lock); + put_rpccred(oldcred); + rcu_read_unlock(); + } else { + /* We appear to have raced with a delegation return. */ + spin_unlock(&delegation->lock); + rcu_read_unlock(); + nfs_inode_set_delegation(inode, cred, res); + } + } else { + rcu_read_unlock(); + } } static int nfs_do_return_delegation(struct inode *inode, struct nfs_delegation *delegation, int issync) @@ -166,9 +176,13 @@ static struct inode *nfs_delegation_grab_inode(struct nfs_delegation *delegation return inode; } -static struct nfs_delegation *nfs_detach_delegation_locked(struct nfs_inode *nfsi, const nfs4_stateid *stateid) +static struct nfs_delegation *nfs_detach_delegation_locked(struct nfs_inode *nfsi, + const nfs4_stateid *stateid, + struct nfs_client *clp) { - struct nfs_delegation *delegation = rcu_dereference(nfsi->delegation); + struct nfs_delegation *delegation = + rcu_dereference_protected(nfsi->delegation, + lockdep_is_held(&clp->cl_lock)); if (delegation == NULL) goto nomatch; @@ -195,7 +209,7 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct { struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; struct nfs_inode *nfsi = NFS_I(inode); - struct nfs_delegation *delegation; + struct nfs_delegation *delegation, *old_delegation; struct nfs_delegation *freeme = NULL; int status = 0; @@ -213,10 +227,12 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct spin_lock_init(&delegation->lock); spin_lock(&clp->cl_lock); - if (rcu_dereference(nfsi->delegation) != NULL) { - if (memcmp(&delegation->stateid, &nfsi->delegation->stateid, - sizeof(delegation->stateid)) == 0 && - delegation->type == nfsi->delegation->type) { + old_delegation = rcu_dereference_protected(nfsi->delegation, + lockdep_is_held(&clp->cl_lock)); + if (old_delegation != NULL) { + if (memcmp(&delegation->stateid, &old_delegation->stateid, + sizeof(old_delegation->stateid)) == 0 && + delegation->type == old_delegation->type) { goto out; } /* @@ -226,12 +242,12 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct dfprintk(FILE, "%s: server %s handed out " "a duplicate delegation!\n", __func__, clp->cl_hostname); - if (delegation->type <= nfsi->delegation->type) { + if (delegation->type <= old_delegation->type) { freeme = delegation; delegation = NULL; goto out; } - freeme = nfs_detach_delegation_locked(nfsi, NULL); + freeme = nfs_detach_delegation_locked(nfsi, NULL, clp); } list_add_rcu(&delegation->super_list, &clp->cl_delegations); nfsi->delegation_state = delegation->type; @@ -301,7 +317,7 @@ restart: if (inode == NULL) continue; spin_lock(&clp->cl_lock); - delegation = nfs_detach_delegation_locked(NFS_I(inode), NULL); + delegation = nfs_detach_delegation_locked(NFS_I(inode), NULL, clp); spin_unlock(&clp->cl_lock); rcu_read_unlock(); if (delegation != NULL) { @@ -330,9 +346,9 @@ void nfs_inode_return_delegation_noreclaim(struct inode *inode) struct nfs_inode *nfsi = NFS_I(inode); struct nfs_delegation *delegation; - if (rcu_dereference(nfsi->delegation) != NULL) { + if (rcu_access_pointer(nfsi->delegation) != NULL) { spin_lock(&clp->cl_lock); - delegation = nfs_detach_delegation_locked(nfsi, NULL); + delegation = nfs_detach_delegation_locked(nfsi, NULL, clp); spin_unlock(&clp->cl_lock); if (delegation != NULL) nfs_do_return_delegation(inode, delegation, 0); @@ -346,9 +362,9 @@ int nfs_inode_return_delegation(struct inode *inode) struct nfs_delegation *delegation; int err = 0; - if (rcu_dereference(nfsi->delegation) != NULL) { + if (rcu_access_pointer(nfsi->delegation) != NULL) { spin_lock(&clp->cl_lock); - delegation = nfs_detach_delegation_locked(nfsi, NULL); + delegation = nfs_detach_delegation_locked(nfsi, NULL, clp); spin_unlock(&clp->cl_lock); if (delegation != NULL) { nfs_msync_inode(inode); @@ -526,7 +542,7 @@ restart: if (inode == NULL) continue; spin_lock(&clp->cl_lock); - delegation = nfs_detach_delegation_locked(NFS_I(inode), NULL); + delegation = nfs_detach_delegation_locked(NFS_I(inode), NULL, clp); spin_unlock(&clp->cl_lock); rcu_read_unlock(); if (delegation != NULL) diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index c6f2750648f..a7bb5c694aa 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -837,6 +837,8 @@ out_zap_parent: /* If we have submounts, don't unhash ! */ if (have_submounts(dentry)) goto out_valid; + if (dentry->d_flags & DCACHE_DISCONNECTED) + goto out_valid; shrink_dcache_parent(dentry); } d_drop(dentry); @@ -1025,12 +1027,12 @@ static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry res = NULL; goto out; /* This turned out not to be a regular file */ + case -EISDIR: case -ENOTDIR: goto no_open; case -ELOOP: if (!(nd->intent.open.flags & O_NOFOLLOW)) goto no_open; - /* case -EISDIR: */ /* case -EINVAL: */ default: goto out; @@ -1050,7 +1052,7 @@ static int nfs_open_revalidate(struct dentry *dentry, struct nameidata *nd) struct inode *dir; int openflags, ret = 0; - if (!is_atomic_open(nd)) + if (!is_atomic_open(nd) || d_mountpoint(dentry)) goto no_open; parent = dget_parent(dentry); dir = parent->d_inode; diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 737128f777f..50a56edca0b 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -623,10 +623,10 @@ struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_c list_for_each_entry(pos, &nfsi->open_files, list) { if (cred != NULL && pos->cred != cred) continue; - if ((pos->mode & mode) == mode) { - ctx = get_nfs_open_context(pos); - break; - } + if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) + continue; + ctx = get_nfs_open_context(pos); + break; } spin_unlock(&inode->i_lock); return ctx; diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index d79a7b37e56..071fcedd517 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -1523,6 +1523,8 @@ static int _nfs4_proc_open(struct nfs4_opendata *data) nfs_post_op_update_inode(dir, o_res->dir_attr); } else nfs_refresh_inode(dir, o_res->dir_attr); + if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) + server->caps &= ~NFS_CAP_POSIX_LOCK; if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { status = _nfs4_proc_open_confirm(data); if (status != 0) @@ -1664,7 +1666,7 @@ static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, in status = PTR_ERR(state); if (IS_ERR(state)) goto err_opendata_put; - if ((opendata->o_res.rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) != 0) + if (server->caps & NFS_CAP_POSIX_LOCK) set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); nfs4_opendata_put(opendata); nfs4_put_state_owner(sp); @@ -2068,8 +2070,7 @@ nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, st case -EDQUOT: case -ENOSPC: case -EROFS: - lookup_instantiate_filp(nd, (struct dentry *)state, NULL); - return 1; + return PTR_ERR(state); default: goto out_drop; } @@ -5217,9 +5218,12 @@ static int nfs41_proc_reclaim_complete(struct nfs_client *clp) msg.rpc_resp = &calldata->res; task_setup_data.callback_data = calldata; task = rpc_run_task(&task_setup_data); - if (IS_ERR(task)) + if (IS_ERR(task)) { status = PTR_ERR(task); + goto out; + } rpc_put_task(task); + return 0; out: dprintk("<-- %s status=%d\n", __func__, status); return status; diff --git a/fs/nfs/super.c b/fs/nfs/super.c index e01637240ee..b4148fc00f9 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -2187,6 +2187,7 @@ static int nfs_get_sb(struct file_system_type *fs_type, if (data->version == 4) { error = nfs4_try_mount(flags, dev_name, data, mnt); kfree(data->client_address); + kfree(data->nfs_server.export_path); goto out; } #endif /* CONFIG_NFS_V4 */ @@ -2657,7 +2658,7 @@ static void nfs_fix_devname(const struct path *path, struct vfsmount *mnt) devname = nfs_path(path->mnt->mnt_devname, path->mnt->mnt_root, path->dentry, page, PAGE_SIZE); - if (devname == NULL) + if (IS_ERR(devname)) goto out_freepage; tmp = kstrdup(devname, GFP_KERNEL); if (tmp == NULL) diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 53ff70e2399..3aea3ca98ab 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -201,6 +201,7 @@ static int nfs_set_page_writeback(struct page *page) struct inode *inode = page->mapping->host; struct nfs_server *nfss = NFS_SERVER(inode); + page_cache_get(page); if (atomic_long_inc_return(&nfss->writeback) > NFS_CONGESTION_ON_THRESH) { set_bdi_congested(&nfss->backing_dev_info, @@ -216,6 +217,7 @@ static void nfs_end_page_writeback(struct page *page) struct nfs_server *nfss = NFS_SERVER(inode); end_page_writeback(page); + page_cache_release(page); if (atomic_long_dec_return(&nfss->writeback) < NFS_CONGESTION_OFF_THRESH) clear_bdi_congested(&nfss->backing_dev_info, BLK_RW_ASYNC); } @@ -421,6 +423,7 @@ static void nfs_mark_request_dirty(struct nfs_page *req) { __set_page_dirty_nobuffers(req->wb_page); + __mark_inode_dirty(req->wb_page->mapping->host, I_DIRTY_DATASYNC); } #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) @@ -660,9 +663,11 @@ static int nfs_writepage_setup(struct nfs_open_context *ctx, struct page *page, req = nfs_setup_write_request(ctx, page, offset, count); if (IS_ERR(req)) return PTR_ERR(req); + nfs_mark_request_dirty(req); /* Update file length */ nfs_grow_file(page, offset, count); nfs_mark_uptodate(page, req->wb_pgbase, req->wb_bytes); + nfs_mark_request_dirty(req); nfs_clear_page_tag_locked(req); return 0; } @@ -739,8 +744,6 @@ int nfs_updatepage(struct file *file, struct page *page, status = nfs_writepage_setup(ctx, page, offset, count); if (status < 0) nfs_set_pageerror(page); - else - __set_page_dirty_nobuffers(page); dprintk("NFS: nfs_updatepage returns %d (isize %lld)\n", status, (long long)i_size_read(inode)); @@ -749,13 +752,12 @@ int nfs_updatepage(struct file *file, struct page *page, static void nfs_writepage_release(struct nfs_page *req) { + struct page *page = req->wb_page; - if (PageError(req->wb_page) || !nfs_reschedule_unstable_write(req)) { - nfs_end_page_writeback(req->wb_page); + if (PageError(req->wb_page) || !nfs_reschedule_unstable_write(req)) nfs_inode_remove_request(req); - } else - nfs_end_page_writeback(req->wb_page); nfs_clear_page_tag_locked(req); + nfs_end_page_writeback(page); } static int flush_task_priority(int how) @@ -779,7 +781,6 @@ static int nfs_write_rpcsetup(struct nfs_page *req, int how) { struct inode *inode = req->wb_context->path.dentry->d_inode; - int flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; int priority = flush_task_priority(how); struct rpc_task *task; struct rpc_message msg = { @@ -794,9 +795,10 @@ static int nfs_write_rpcsetup(struct nfs_page *req, .callback_ops = call_ops, .callback_data = data, .workqueue = nfsiod_workqueue, - .flags = flags, + .flags = RPC_TASK_ASYNC, .priority = priority, }; + int ret = 0; /* Set up the RPC argument and reply structs * NB: take care not to mess about with data->commit et al. */ @@ -835,10 +837,18 @@ static int nfs_write_rpcsetup(struct nfs_page *req, (unsigned long long)data->args.offset); task = rpc_run_task(&task_setup_data); - if (IS_ERR(task)) - return PTR_ERR(task); + if (IS_ERR(task)) { + ret = PTR_ERR(task); + goto out; + } + if (how & FLUSH_SYNC) { + ret = rpc_wait_for_completion_task(task); + if (ret == 0) + ret = task->tk_status; + } rpc_put_task(task); - return 0; +out: + return ret; } /* If a nfs_flush_* function fails, it should remove reqs from @head and @@ -847,9 +857,11 @@ static int nfs_write_rpcsetup(struct nfs_page *req, */ static void nfs_redirty_request(struct nfs_page *req) { + struct page *page = req->wb_page; + nfs_mark_request_dirty(req); - nfs_end_page_writeback(req->wb_page); nfs_clear_page_tag_locked(req); + nfs_end_page_writeback(page); } /* @@ -1084,16 +1096,15 @@ static void nfs_writeback_release_full(void *calldata) if (nfs_write_need_commit(data)) { memcpy(&req->wb_verf, &data->verf, sizeof(req->wb_verf)); nfs_mark_request_commit(req); - nfs_end_page_writeback(page); dprintk(" marked for commit\n"); goto next; } dprintk(" OK\n"); remove_request: - nfs_end_page_writeback(page); nfs_inode_remove_request(req); next: nfs_clear_page_tag_locked(req); + nfs_end_page_writeback(page); } nfs_writedata_release(calldata); } @@ -1190,6 +1201,25 @@ int nfs_writeback_done(struct rpc_task *task, struct nfs_write_data *data) #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) +static int nfs_commit_set_lock(struct nfs_inode *nfsi, int may_wait) +{ + if (!test_and_set_bit(NFS_INO_COMMIT, &nfsi->flags)) + return 1; + if (may_wait && !out_of_line_wait_on_bit_lock(&nfsi->flags, + NFS_INO_COMMIT, nfs_wait_bit_killable, + TASK_KILLABLE)) + return 1; + return 0; +} + +static void nfs_commit_clear_lock(struct nfs_inode *nfsi) +{ + clear_bit(NFS_INO_COMMIT, &nfsi->flags); + smp_mb__after_clear_bit(); + wake_up_bit(&nfsi->flags, NFS_INO_COMMIT); +} + + static void nfs_commitdata_release(void *data) { struct nfs_write_data *wdata = data; @@ -1207,7 +1237,6 @@ static int nfs_commit_rpcsetup(struct list_head *head, { struct nfs_page *first = nfs_list_entry(head->next); struct inode *inode = first->wb_context->path.dentry->d_inode; - int flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; int priority = flush_task_priority(how); struct rpc_task *task; struct rpc_message msg = { @@ -1222,7 +1251,7 @@ static int nfs_commit_rpcsetup(struct list_head *head, .callback_ops = &nfs_commit_ops, .callback_data = data, .workqueue = nfsiod_workqueue, - .flags = flags, + .flags = RPC_TASK_ASYNC, .priority = priority, }; @@ -1282,6 +1311,7 @@ nfs_commit_list(struct inode *inode, struct list_head *head, int how) BDI_RECLAIMABLE); nfs_clear_page_tag_locked(req); } + nfs_commit_clear_lock(NFS_I(inode)); return -ENOMEM; } @@ -1337,6 +1367,7 @@ static void nfs_commit_release(void *calldata) next: nfs_clear_page_tag_locked(req); } + nfs_commit_clear_lock(NFS_I(data->inode)); nfs_commitdata_release(calldata); } @@ -1351,8 +1382,11 @@ static const struct rpc_call_ops nfs_commit_ops = { static int nfs_commit_inode(struct inode *inode, int how) { LIST_HEAD(head); - int res; + int may_wait = how & FLUSH_SYNC; + int res = 0; + if (!nfs_commit_set_lock(NFS_I(inode), may_wait)) + goto out; spin_lock(&inode->i_lock); res = nfs_scan_commit(inode, &head, 0, 0); spin_unlock(&inode->i_lock); @@ -1360,7 +1394,13 @@ static int nfs_commit_inode(struct inode *inode, int how) int error = nfs_commit_list(inode, &head, how); if (error < 0) return error; - } + if (may_wait) + wait_on_bit(&NFS_I(inode)->flags, NFS_INO_COMMIT, + nfs_wait_bit_killable, + TASK_KILLABLE); + } else + nfs_commit_clear_lock(NFS_I(inode)); +out: return res; } @@ -1432,6 +1472,7 @@ int nfs_wb_page_cancel(struct inode *inode, struct page *page) BUG_ON(!PageLocked(page)); for (;;) { + wait_on_page_writeback(page); req = nfs_page_find_request(page); if (req == NULL) break; @@ -1466,30 +1507,18 @@ int nfs_wb_page(struct inode *inode, struct page *page) .range_start = range_start, .range_end = range_end, }; - struct nfs_page *req; - int need_commit; int ret; while(PagePrivate(page)) { + wait_on_page_writeback(page); if (clear_page_dirty_for_io(page)) { ret = nfs_writepage_locked(page, &wbc); if (ret < 0) goto out_error; } - req = nfs_find_and_lock_request(page); - if (!req) - break; - if (IS_ERR(req)) { - ret = PTR_ERR(req); + ret = sync_inode(inode, &wbc); + if (ret < 0) goto out_error; - } - need_commit = test_bit(PG_CLEAN, &req->wb_flags); - nfs_clear_page_tag_locked(req); - if (need_commit) { - ret = nfs_commit_inode(inode, FLUSH_SYNC); - if (ret < 0) - goto out_error; - } } return 0; out_error: |