diff options
Diffstat (limited to 'fs/afs')
-rw-r--r-- | fs/afs/cell.c | 328 | ||||
-rw-r--r-- | fs/afs/cmservice.c | 16 | ||||
-rw-r--r-- | fs/afs/dynroot.c | 43 | ||||
-rw-r--r-- | fs/afs/file.c | 2 | ||||
-rw-r--r-- | fs/afs/flock.c | 1 | ||||
-rw-r--r-- | fs/afs/fs_operation.c | 1 | ||||
-rw-r--r-- | fs/afs/fs_probe.c | 4 | ||||
-rw-r--r-- | fs/afs/fsclient.c | 42 | ||||
-rw-r--r-- | fs/afs/inode.c | 47 | ||||
-rw-r--r-- | fs/afs/internal.h | 35 | ||||
-rw-r--r-- | fs/afs/main.c | 2 | ||||
-rw-r--r-- | fs/afs/misc.c | 18 | ||||
-rw-r--r-- | fs/afs/mntpt.c | 4 | ||||
-rw-r--r-- | fs/afs/proc.c | 28 | ||||
-rw-r--r-- | fs/afs/rotate.c | 2 | ||||
-rw-r--r-- | fs/afs/rxrpc.c | 6 | ||||
-rw-r--r-- | fs/afs/server.c | 7 | ||||
-rw-r--r-- | fs/afs/super.c | 19 | ||||
-rw-r--r-- | fs/afs/vl_alias.c | 8 | ||||
-rw-r--r-- | fs/afs/vl_list.c | 1 | ||||
-rw-r--r-- | fs/afs/vl_probe.c | 82 | ||||
-rw-r--r-- | fs/afs/vl_rotate.c | 9 | ||||
-rw-r--r-- | fs/afs/vlclient.c | 24 | ||||
-rw-r--r-- | fs/afs/volume.c | 6 | ||||
-rw-r--r-- | fs/afs/write.c | 13 | ||||
-rw-r--r-- | fs/afs/yfsclient.c | 50 |
26 files changed, 485 insertions, 313 deletions
diff --git a/fs/afs/cell.c b/fs/afs/cell.c index 5b79cdceefa0..52233fa6195f 100644 --- a/fs/afs/cell.c +++ b/fs/afs/cell.c @@ -18,8 +18,10 @@ static unsigned __read_mostly afs_cell_gc_delay = 10; static unsigned __read_mostly afs_cell_min_ttl = 10 * 60; static unsigned __read_mostly afs_cell_max_ttl = 24 * 60 * 60; +static atomic_t cell_debug_id; -static void afs_manage_cell(struct work_struct *); +static void afs_queue_cell_manager(struct afs_net *); +static void afs_manage_cell_work(struct work_struct *); static void afs_dec_cells_outstanding(struct afs_net *net) { @@ -37,19 +39,22 @@ static void afs_set_cell_timer(struct afs_net *net, time64_t delay) atomic_inc(&net->cells_outstanding); if (timer_reduce(&net->cells_timer, jiffies + delay * HZ)) afs_dec_cells_outstanding(net); + } else { + afs_queue_cell_manager(net); } } /* - * Look up and get an activation reference on a cell record under RCU - * conditions. The caller must hold the RCU read lock. + * Look up and get an activation reference on a cell record. The caller must + * hold net->cells_lock at least read-locked. */ -struct afs_cell *afs_lookup_cell_rcu(struct afs_net *net, - const char *name, unsigned int namesz) +static struct afs_cell *afs_find_cell_locked(struct afs_net *net, + const char *name, unsigned int namesz, + enum afs_cell_trace reason) { struct afs_cell *cell = NULL; struct rb_node *p; - int n, seq = 0, ret = 0; + int n; _enter("%*.*s", namesz, namesz, name); @@ -58,61 +63,48 @@ struct afs_cell *afs_lookup_cell_rcu(struct afs_net *net, if (namesz > AFS_MAXCELLNAME) return ERR_PTR(-ENAMETOOLONG); - do { - /* Unfortunately, rbtree walking doesn't give reliable results - * under just the RCU read lock, so we have to check for - * changes. - */ - if (cell) - afs_put_cell(net, cell); - cell = NULL; - ret = -ENOENT; - - read_seqbegin_or_lock(&net->cells_lock, &seq); - - if (!name) { - cell = rcu_dereference_raw(net->ws_cell); - if (cell) { - afs_get_cell(cell); - ret = 0; - break; - } - ret = -EDESTADDRREQ; - continue; - } + if (!name) { + cell = net->ws_cell; + if (!cell) + return ERR_PTR(-EDESTADDRREQ); + goto found; + } - p = rcu_dereference_raw(net->cells.rb_node); - while (p) { - cell = rb_entry(p, struct afs_cell, net_node); - - n = strncasecmp(cell->name, name, - min_t(size_t, cell->name_len, namesz)); - if (n == 0) - n = cell->name_len - namesz; - if (n < 0) { - p = rcu_dereference_raw(p->rb_left); - } else if (n > 0) { - p = rcu_dereference_raw(p->rb_right); - } else { - if (atomic_inc_not_zero(&cell->usage)) { - ret = 0; - break; - } - /* We want to repeat the search, this time with - * the lock properly locked. - */ - } - cell = NULL; - } + p = net->cells.rb_node; + while (p) { + cell = rb_entry(p, struct afs_cell, net_node); - } while (need_seqretry(&net->cells_lock, seq)); + n = strncasecmp(cell->name, name, + min_t(size_t, cell->name_len, namesz)); + if (n == 0) + n = cell->name_len - namesz; + if (n < 0) + p = p->rb_left; + else if (n > 0) + p = p->rb_right; + else + goto found; + } - done_seqretry(&net->cells_lock, seq); + return ERR_PTR(-ENOENT); - if (ret != 0 && cell) - afs_put_cell(net, cell); +found: + return afs_use_cell(cell, reason); +} - return ret == 0 ? cell : ERR_PTR(ret); +/* + * Look up and get an activation reference on a cell record. + */ +struct afs_cell *afs_find_cell(struct afs_net *net, + const char *name, unsigned int namesz, + enum afs_cell_trace reason) +{ + struct afs_cell *cell; + + down_read(&net->cells_lock); + cell = afs_find_cell_locked(net, name, namesz, reason); + up_read(&net->cells_lock); + return cell; } /* @@ -166,8 +158,9 @@ static struct afs_cell *afs_alloc_cell(struct afs_net *net, cell->name[i] = tolower(name[i]); cell->name[i] = 0; - atomic_set(&cell->usage, 2); - INIT_WORK(&cell->manager, afs_manage_cell); + atomic_set(&cell->ref, 1); + atomic_set(&cell->active, 0); + INIT_WORK(&cell->manager, afs_manage_cell_work); cell->volumes = RB_ROOT; INIT_HLIST_HEAD(&cell->proc_volumes); seqlock_init(&cell->volume_lock); @@ -206,6 +199,9 @@ static struct afs_cell *afs_alloc_cell(struct afs_net *net, cell->dns_source = vllist->source; cell->dns_status = vllist->status; smp_store_release(&cell->dns_lookup_count, 1); /* vs source/status */ + atomic_inc(&net->cells_outstanding); + cell->debug_id = atomic_inc_return(&cell_debug_id); + trace_afs_cell(cell->debug_id, 1, 0, afs_cell_trace_alloc); _leave(" = %p", cell); return cell; @@ -245,9 +241,7 @@ struct afs_cell *afs_lookup_cell(struct afs_net *net, _enter("%s,%s", name, vllist); if (!excl) { - rcu_read_lock(); - cell = afs_lookup_cell_rcu(net, name, namesz); - rcu_read_unlock(); + cell = afs_find_cell(net, name, namesz, afs_cell_trace_use_lookup); if (!IS_ERR(cell)) goto wait_for_cell; } @@ -268,7 +262,7 @@ struct afs_cell *afs_lookup_cell(struct afs_net *net, /* Find the insertion point and check to see if someone else added a * cell whilst we were allocating. */ - write_seqlock(&net->cells_lock); + down_write(&net->cells_lock); pp = &net->cells.rb_node; parent = NULL; @@ -290,23 +284,26 @@ struct afs_cell *afs_lookup_cell(struct afs_net *net, cell = candidate; candidate = NULL; + atomic_set(&cell->active, 2); + trace_afs_cell(cell->debug_id, atomic_read(&cell->ref), 2, afs_cell_trace_insert); rb_link_node_rcu(&cell->net_node, parent, pp); rb_insert_color(&cell->net_node, &net->cells); - atomic_inc(&net->cells_outstanding); - write_sequnlock(&net->cells_lock); + up_write(&net->cells_lock); - queue_work(afs_wq, &cell->manager); + afs_queue_cell(cell, afs_cell_trace_get_queue_new); wait_for_cell: + trace_afs_cell(cell->debug_id, atomic_read(&cell->ref), atomic_read(&cell->active), + afs_cell_trace_wait); _debug("wait_for_cell"); wait_var_event(&cell->state, ({ state = smp_load_acquire(&cell->state); /* vs error */ - state == AFS_CELL_ACTIVE || state == AFS_CELL_FAILED; + state == AFS_CELL_ACTIVE || state == AFS_CELL_REMOVED; })); /* Check the state obtained from the wait check. */ - if (state == AFS_CELL_FAILED) { + if (state == AFS_CELL_REMOVED) { ret = cell->error; goto error; } @@ -320,16 +317,17 @@ cell_already_exists: if (excl) { ret = -EEXIST; } else { - afs_get_cell(cursor); + afs_use_cell(cursor, afs_cell_trace_use_lookup); ret = 0; } - write_sequnlock(&net->cells_lock); - kfree(candidate); + up_write(&net->cells_lock); + if (candidate) + afs_put_cell(candidate, afs_cell_trace_put_candidate); if (ret == 0) goto wait_for_cell; goto error_noput; error: - afs_put_cell(net, cell); + afs_unuse_cell(net, cell, afs_cell_trace_unuse_lookup); error_noput: _leave(" = %d [error]", ret); return ERR_PTR(ret); @@ -374,15 +372,16 @@ int afs_cell_init(struct afs_net *net, const char *rootcell) } if (!test_and_set_bit(AFS_CELL_FL_NO_GC, &new_root->flags)) - afs_get_cell(new_root); + afs_use_cell(new_root, afs_cell_trace_use_pin); /* install the new cell */ - write_seqlock(&net->cells_lock); - old_root = rcu_access_pointer(net->ws_cell); - rcu_assign_pointer(net->ws_cell, new_root); - write_sequnlock(&net->cells_lock); + down_write(&net->cells_lock); + afs_see_cell(new_root, afs_cell_trace_see_ws); + old_root = net->ws_cell; + net->ws_cell = new_root; + up_write(&net->cells_lock); - afs_put_cell(net, old_root); + afs_unuse_cell(net, old_root, afs_cell_trace_unuse_ws); _leave(" = 0"); return 0; } @@ -488,18 +487,22 @@ out_wake: static void afs_cell_destroy(struct rcu_head *rcu) { struct afs_cell *cell = container_of(rcu, struct afs_cell, rcu); + struct afs_net *net = cell->net; + int u; _enter("%p{%s}", cell, cell->name); - ASSERTCMP(atomic_read(&cell->usage), ==, 0); + u = atomic_read(&cell->ref); + ASSERTCMP(u, ==, 0); + trace_afs_cell(cell->debug_id, u, atomic_read(&cell->active), afs_cell_trace_free); - afs_put_volume(cell->net, cell->root_volume, afs_volume_trace_put_cell_root); - afs_put_vlserverlist(cell->net, rcu_access_pointer(cell->vl_servers)); - afs_put_cell(cell->net, cell->alias_of); + afs_put_vlserverlist(net, rcu_access_pointer(cell->vl_servers)); + afs_unuse_cell(net, cell->alias_of, afs_cell_trace_unuse_alias); key_put(cell->anonymous_key); kfree(cell->name); kfree(cell); + afs_dec_cells_outstanding(net); _leave(" [destroyed]"); } @@ -532,18 +535,63 @@ void afs_cells_timer(struct timer_list *timer) /* * Get a reference on a cell record. */ -struct afs_cell *afs_get_cell(struct afs_cell *cell) +struct afs_cell *afs_get_cell(struct afs_cell *cell, enum afs_cell_trace reason) { - atomic_inc(&cell->usage); + int u; + + if (atomic_read(&cell->ref) <= 0) + BUG(); + + u = atomic_inc_return(&cell->ref); + trace_afs_cell(cell->debug_id, u, atomic_read(&cell->active), reason); return cell; } /* * Drop a reference on a cell record. */ -void afs_put_cell(struct afs_net *net, struct afs_cell *cell) +void afs_put_cell(struct afs_cell *cell, enum afs_cell_trace reason) { + if (cell) { + unsigned int debug_id = cell->debug_id; + unsigned int u, a; + + a = atomic_read(&cell->active); + u = atomic_dec_return(&cell->ref); + trace_afs_cell(debug_id, u, a, reason); + if (u == 0) { + a = atomic_read(&cell->active); + WARN(a != 0, "Cell active count %u > 0\n", a); + call_rcu(&cell->rcu, afs_cell_destroy); + } + } +} + +/* + * Note a cell becoming more active. + */ +struct afs_cell *afs_use_cell(struct afs_cell *cell, enum afs_cell_trace reason) +{ + int u, a; + + if (atomic_read(&cell->ref) <= 0) + BUG(); + + u = atomic_read(&cell->ref); + a = atomic_inc_return(&cell->active); + trace_afs_cell(cell->debug_id, u, a, reason); + return cell; +} + +/* + * Record a cell becoming less active. When the active counter reaches 1, it + * is scheduled for destruction, but may get reactivated. + */ +void afs_unuse_cell(struct afs_net *net, struct afs_cell *cell, enum afs_cell_trace reason) +{ + unsigned int debug_id = cell->debug_id; time64_t now, expire_delay; + int u, a; if (!cell) return; @@ -556,11 +604,35 @@ void afs_put_cell(struct afs_net *net, struct afs_cell *cell) if (cell->vl_servers->nr_servers) expire_delay = afs_cell_gc_delay; - if (atomic_dec_return(&cell->usage) > 1) - return; + u = atomic_read(&cell->ref); + a = atomic_dec_return(&cell->active); + trace_afs_cell(debug_id, u, a, reason); + WARN_ON(a == 0); + if (a == 1) + /* 'cell' may now be garbage collected. */ + afs_set_cell_timer(net, expire_delay); +} + +/* + * Note that a cell has been seen. + */ +void afs_see_cell(struct afs_cell *cell, enum afs_cell_trace reason) +{ + int u, a; + + u = atomic_read(&cell->ref); + a = atomic_read(&cell->active); + trace_afs_cell(cell->debug_id, u, a, reason); +} - /* 'cell' may now be garbage collected. */ - afs_set_cell_timer(net, expire_delay); +/* + * Queue a cell for management, giving the workqueue a ref to hold. + */ +void afs_queue_cell(struct afs_cell *cell, enum afs_cell_trace reason) +{ + afs_get_cell(cell, reason); + if (!queue_work(afs_wq, &cell->manager)) + afs_put_cell(cell, afs_cell_trace_put_queue_fail); } /* @@ -660,12 +732,10 @@ static void afs_deactivate_cell(struct afs_net *net, struct afs_cell *cell) * Manage a cell record, initialising and destroying it, maintaining its DNS * records. */ -static void afs_manage_cell(struct work_struct *work) +static void afs_manage_cell(struct afs_cell *cell) { - struct afs_cell *cell = container_of(work, struct afs_cell, manager); struct afs_net *net = cell->net; - bool deleted; - int ret, usage; + int ret, active; _enter("%s", cell->name); @@ -674,14 +744,19 @@ again: switch (cell->state) { case AFS_CELL_INACTIVE: case AFS_CELL_FAILED: - write_seqlock(&net->cells_lock); - usage = 1; - deleted = atomic_try_cmpxchg_relaxed(&cell->usage, &usage, 0); - if (deleted) + down_write(&net->cells_lock); + active = 1; + if (atomic_try_cmpxchg_relaxed(&cell->active, &active, 0)) { rb_erase(&cell->net_node, &net->cells); - write_sequnlock(&net->cells_lock); - if (deleted) + trace_afs_cell(cell->debug_id, atomic_read(&cell->ref), 0, + afs_cell_trace_unuse_delete); + smp_store_release(&cell->state, AFS_CELL_REMOVED); + } + up_write(&net->cells_lock); + if (cell->state == AFS_CELL_REMOVED) { + wake_up_var(&cell->state); goto final_destruction; + } if (cell->state == AFS_CELL_FAILED) goto done; smp_store_release(&cell->state, AFS_CELL_UNSET); @@ -703,7 +778,7 @@ again: goto again; case AFS_CELL_ACTIVE: - if (atomic_read(&cell->usage) > 1) { + if (atomic_read(&cell->active) > 1) { if (test_and_clear_bit(AFS_CELL_FL_DO_LOOKUP, &cell->flags)) { ret = afs_update_cell(cell); if (ret < 0) @@ -716,13 +791,16 @@ again: goto again; case AFS_CELL_DEACTIVATING: - if (atomic_read(&cell->usage) > 1) + if (atomic_read(&cell->active) > 1) goto reverse_deactivation; afs_deactivate_cell(net, cell); smp_store_release(&cell->state, AFS_CELL_INACTIVE); wake_up_var(&cell->state); goto again; + case AFS_CELL_REMOVED: + goto done; + default: break; } @@ -748,9 +826,18 @@ done: return; final_destruction: - call_rcu(&cell->rcu, afs_cell_destroy); - afs_dec_cells_outstanding(net); - _leave(" [destruct %d]", atomic_read(&net->cells_outstanding)); + /* The root volume is pinning the cell */ + afs_put_volume(cell->net, cell->root_volume, afs_volume_trace_put_cell_root); + cell->root_volume = NULL; + afs_put_cell(cell, afs_cell_trace_put_destroy); +} + +static void afs_manage_cell_work(struct work_struct *work) +{ + struct afs_cell *cell = container_of(work, struct afs_cell, manager); + + afs_manage_cell(cell); + afs_put_cell(cell, afs_cell_trace_put_queue_work); } /* @@ -779,26 +866,29 @@ void afs_manage_cells(struct work_struct *work) * lack of use and cells whose DNS results have expired and dispatch * their managers. */ - read_seqlock_excl(&net->cells_lock); + down_read(&net->cells_lock); for (cursor = rb_first(&net->cells); cursor; cursor = rb_next(cursor)) { struct afs_cell *cell = rb_entry(cursor, struct afs_cell, net_node); - unsigned usage; + unsigned active; bool sched_cell = false; - usage = atomic_read(&cell->usage); - _debug("manage %s %u", cell->name, usage); + active = atomic_read(&cell->active); + trace_afs_cell(cell->debug_id, atomic_read(&cell->ref), + active, afs_cell_trace_manage); - ASSERTCMP(usage, >=, 1); + ASSERTCMP(active, >=, 1); if (purging) { - if (test_and_clear_bit(AFS_CELL_FL_NO_GC, &cell->flags)) - usage = atomic_dec_return(&cell->usage); - ASSERTCMP(usage, ==, 1); + if (test_and_clear_bit(AFS_CELL_FL_NO_GC, &cell->flags)) { + active = atomic_dec_return(&cell->active); + trace_afs_cell(cell->debug_id, atomic_read(&cell->ref), + active, afs_cell_trace_unuse_pin); + } } - if (usage == 1) { + if (active == 1) { struct afs_vlserver_list *vllist; time64_t expire_at = cell->last_inactive; @@ -821,10 +911,10 @@ void afs_manage_cells(struct work_struct *work) } if (sched_cell) - queue_work(afs_wq, &cell->manager); + afs_queue_cell(cell, afs_cell_trace_get_queue_manage); } - read_sequnlock_excl(&net->cells_lock); + up_read(&net->cells_lock); /* Update the timer on the way out. We have to pass an increment on * cells_outstanding in the namespace that we are in to the timer or @@ -854,11 +944,11 @@ void afs_cell_purge(struct afs_net *net) _enter(""); - write_seqlock(&net->cells_lock); - ws = rcu_access_pointer(net->ws_cell); - RCU_INIT_POINTER(net->ws_cell, NULL); - write_sequnlock(&net->cells_lock); - afs_put_cell(net, ws); + down_write(&net->cells_lock); + ws = net->ws_cell; + net->ws_cell = NULL; + up_write(&net->cells_lock); + afs_unuse_cell(net, ws, afs_cell_trace_unuse_ws); _debug("del timer"); if (del_timer_sync(&net->cells_timer)) diff --git a/fs/afs/cmservice.c b/fs/afs/cmservice.c index bef413818af7..a4e9e6e07e93 100644 --- a/fs/afs/cmservice.c +++ b/fs/afs/cmservice.c @@ -252,7 +252,7 @@ static int afs_deliver_cb_callback(struct afs_call *call) call->unmarshall++; /* extract the FID array and its count in two steps */ - /* fall through */ + fallthrough; case 1: _debug("extract FID count"); ret = afs_extract_data(call, true); @@ -271,7 +271,7 @@ static int afs_deliver_cb_callback(struct afs_call *call) afs_extract_to_buf(call, call->count * 3 * 4); call->unmarshall++; - /* Fall through */ + fallthrough; case 2: _debug("extract FID array"); ret = afs_extract_data(call, true); @@ -297,7 +297,7 @@ static int afs_deliver_cb_callback(struct afs_call *call) call->unmarshall++; /* extract the callback array and its count in two steps */ - /* fall through */ + fallthrough; case 3: _debug("extract CB count"); ret = afs_extract_data(call, true); @@ -312,7 +312,7 @@ static int afs_deliver_cb_callback(struct afs_call *call) iov_iter_discard(&call->def_iter, READ, call->count2 * 3 * 4); call->unmarshall++; - /* Fall through */ + fallthrough; case 4: _debug("extract discard %zu/%u", iov_iter_count(call->iter), call->count2 * 3 * 4); @@ -391,7 +391,7 @@ static int afs_deliver_cb_init_call_back_state3(struct afs_call *call) afs_extract_to_buf(call, 11 * sizeof(__be32)); call->unmarshall++; - /* Fall through */ + fallthrough; case 1: _debug("extract UUID"); ret = afs_extract_data(call, false); @@ -503,7 +503,7 @@ static int afs_deliver_cb_probe_uuid(struct afs_call *call) afs_extract_to_buf(call, 11 * sizeof(__be32)); call->unmarshall++; - /* Fall through */ + fallthrough; case 1: _debug("extract UUID"); ret = afs_extract_data(call, false); @@ -618,7 +618,7 @@ static int afs_deliver_yfs_cb_callback(struct afs_call *call) call->unmarshall++; /* extract the FID array and its count in two steps */ - /* Fall through */ + fallthrough; case 1: _debug("extract FID count"); ret = afs_extract_data(call, true); @@ -637,7 +637,7 @@ static int afs_deliver_yfs_cb_callback(struct afs_call *call) afs_extract_to_buf(call, size); call->unmarshall++; - /* Fall through */ + fallthrough; case 2: _debug("extract FID array"); ret = afs_extract_data(call, false); diff --git a/fs/afs/dynroot.c b/fs/afs/dynroot.c index b79879aacc02..db832cc931c8 100644 --- a/fs/afs/dynroot.c +++ b/fs/afs/dynroot.c @@ -123,9 +123,9 @@ static int afs_probe_cell_name(struct dentry *dentry) len--; } - cell = afs_lookup_cell_rcu(net, name, len); + cell = afs_find_cell(net, name, len, afs_cell_trace_use_probe); if (!IS_ERR(cell)) { - afs_put_cell(net, cell); + afs_unuse_cell(net, cell, afs_cell_trace_unuse_probe); return 0; } @@ -179,7 +179,6 @@ static struct dentry *afs_lookup_atcell(struct dentry *dentry) struct afs_cell *cell; struct afs_net *net = afs_d2net(dentry); struct dentry *ret; - unsigned int seq = 0; char *name; int len; @@ -191,17 +190,13 @@ static struct dentry *afs_lookup_atcell(struct dentry *dentry) if (!name) goto out_p; - rcu_read_lock(); - do { - read_seqbegin_or_lock(&net->cells_lock, &seq); - cell = rcu_dereference_raw(net->ws_cell); - if (cell) { - len = cell->name_len; - memcpy(name, cell->name, len + 1); - } - } while (need_seqretry(&net->cells_lock, seq)); - done_seqretry(&net->cells_lock, seq); - rcu_read_unlock(); + down_read(&net->cells_lock); + cell = net->ws_cell; + if (cell) { + len = cell->name_len; + memcpy(name, cell->name, len + 1); + } + up_read(&net->cells_lock); ret = ERR_PTR(-ENOENT); if (!cell) @@ -382,15 +377,17 @@ void afs_dynroot_depopulate(struct super_block *sb) net->dynroot_sb = NULL; mutex_unlock(&net->proc_cells_lock); - inode_lock(root->d_inode); - - /* Remove all the pins for dirs created for manually added cells */ - list_for_each_entry_safe(subdir, tmp, &root->d_subdirs, d_child) { - if (subdir->d_fsdata) { - subdir->d_fsdata = NULL; - dput(subdir); + if (root) { + inode_lock(root->d_inode); + + /* Remove all the pins for dirs created for manually added cells */ + list_for_each_entry_safe(subdir, tmp, &root->d_subdirs, d_child) { + if (subdir->d_fsdata) { + subdir->d_fsdata = NULL; + dput(subdir); + } } - } - inode_unlock(root->d_inode); + inode_unlock(root->d_inode); + } } diff --git a/fs/afs/file.c b/fs/afs/file.c index 6f6ed1605cfe..371d1488cc54 100644 --- a/fs/afs/file.c +++ b/fs/afs/file.c @@ -311,7 +311,7 @@ int afs_page_filler(void *data, struct page *page) case -ENOBUFS: _debug("cache said ENOBUFS"); - /* fall through */ + fallthrough; default: go_on: req = kzalloc(struct_size(req, array, 1), GFP_KERNEL); diff --git a/fs/afs/flock.c b/fs/afs/flock.c index ffb8575345ca..cb3054c7843e 100644 --- a/fs/afs/flock.c +++ b/fs/afs/flock.c @@ -376,7 +376,6 @@ again: spin_unlock(&vnode->lock); return; - /* Fall through */ default: /* Looks like a lock request was withdrawn. */ spin_unlock(&vnode->lock); diff --git a/fs/afs/fs_operation.c b/fs/afs/fs_operation.c index 24fd163c6323..97cab12b0a6c 100644 --- a/fs/afs/fs_operation.c +++ b/fs/afs/fs_operation.c @@ -235,6 +235,7 @@ int afs_put_operation(struct afs_operation *op) afs_end_cursor(&op->ac); afs_put_serverlist(op->net, op->server_list); afs_put_volume(op->net, op->volume, afs_volume_trace_put_put_op); + key_put(op->key); kfree(op); return ret; } diff --git a/fs/afs/fs_probe.c b/fs/afs/fs_probe.c index 5d9ef517cf81..e7e98ad63a91 100644 --- a/fs/afs/fs_probe.c +++ b/fs/afs/fs_probe.c @@ -161,8 +161,8 @@ responded: } } - rtt_us = rxrpc_kernel_get_srtt(call->net->socket, call->rxcall); - if (rtt_us < server->probe.rtt) { + if (rxrpc_kernel_get_srtt(call->net->socket, call->rxcall, &rtt_us) && + rtt_us < server->probe.rtt) { server->probe.rtt = rtt_us; server->rtt = rtt_us; alist->preferred = index; diff --git a/fs/afs/fsclient.c b/fs/afs/fsclient.c index acb4d0ca2649..1d95ed9dd86e 100644 --- a/fs/afs/fsclient.c +++ b/fs/afs/fsclient.c @@ -320,7 +320,7 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call) call->tmp_u = htonl(0); afs_extract_to_tmp(call); } - /* Fall through */ + fallthrough; /* extract the returned data length */ case 1: @@ -348,7 +348,7 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call) call->bvec[0].bv_page = req->pages[req->index]; iov_iter_bvec(&call->def_iter, READ, call->bvec, 1, size); ASSERTCMP(size, <=, PAGE_SIZE); - /* Fall through */ + fallthrough; /* extract the returned data */ case 2: @@ -375,7 +375,7 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call) /* Discard any excess data the server gave us */ afs_extract_discard(call, req->actual_len - req->len); call->unmarshall = 3; - /* Fall through */ + fallthrough; case 3: _debug("extract discard %zu/%llu", @@ -388,7 +388,7 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call) no_more_data: call->unmarshall = 4; afs_extract_to_buf(call, (21 + 3 + 6) * 4); - /* Fall through */ + fallthrough; /* extract the metadata */ case 4: @@ -1343,7 +1343,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call) case 0: call->unmarshall++; afs_extract_to_buf(call, 12 * 4); - /* Fall through */ + fallthrough; /* extract the returned status record */ case 1: @@ -1356,7 +1356,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call) xdr_decode_AFSFetchVolumeStatus(&bp, &op->volstatus.vs); call->unmarshall++; afs_extract_to_tmp(call); - /* Fall through */ + fallthrough; /* extract the volume name length */ case 2: @@ -1371,7 +1371,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call) size = (call->count + 3) & ~3; /* It's padded */ afs_extract_to_buf(call, size); call->unmarshall++; - /* Fall through */ + fallthrough; /* extract the volume name */ case 3: @@ -1385,7 +1385,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call) _debug("volname '%s'", p); afs_extract_to_tmp(call); call->unmarshall++; - /* Fall through */ + fallthrough; /* extract the offline message length */ case 4: @@ -1400,7 +1400,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call) size = (call->count + 3) & ~3; /* It's padded */ afs_extract_to_buf(call, size); call->unmarshall++; - /* Fall through */ + fallthrough; /* extract the offline message */ case 5: @@ -1415,7 +1415,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call) afs_extract_to_tmp(call); call->unmarshall++; - /* Fall through */ + fallthrough; /* extract the message of the day length */ case 6: @@ -1430,7 +1430,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call) size = (call->count + 3) & ~3; /* It's padded */ afs_extract_to_buf(call, size); call->unmarshall++; - /* Fall through */ + fallthrough; /* extract the message of the day */ case 7: @@ -1682,7 +1682,7 @@ static int afs_deliver_fs_get_capabilities(struct afs_call *call) case 0: afs_extract_to_tmp(call); call->unmarshall++; - /* Fall through */ + fallthrough; /* Extract the capabilities word count */ case 1: @@ -1696,7 +1696,7 @@ static int afs_deliver_fs_get_capabilities(struct afs_call *call) call->count2 = count; afs_extract_discard(call, count * sizeof(__be32)); call->unmarshall++; - /* Fall through */ + fallthrough; /* Extract capabilities words */ case 2: @@ -1776,7 +1776,7 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call) case 0: afs_extract_to_tmp(call); call->unmarshall++; - /* Fall through */ + fallthrough; /* Extract the file status count and array in two steps */ case 1: @@ -1794,7 +1794,7 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call) call->unmarshall++; more_counts: afs_extract_to_buf(call, 21 * sizeof(__be32)); - /* Fall through */ + fallthrough; case 2: _debug("extract status array %u", call->count); @@ -1824,7 +1824,7 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call) call->count = 0; call->unmarshall++; afs_extract_to_tmp(call); - /* Fall through */ + fallthrough; /* Extract the callback count and array in two steps */ case 3: @@ -1841,7 +1841,7 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call) call->unmarshall++; more_cbs: afs_extract_to_buf(call, 3 * sizeof(__be32)); - /* Fall through */ + fallthrough; case 4: _debug("extract CB array"); @@ -1870,7 +1870,7 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call) afs_extract_to_buf(call, 6 * sizeof(__be32)); call->unmarshall++; - /* Fall through */ + fallthrough; case 5: ret = afs_extract_data(call, false); @@ -1974,7 +1974,7 @@ static int afs_deliver_fs_fetch_acl(struct afs_call *call) case 0: afs_extract_to_tmp(call); call->unmarshall++; - /* Fall through */ + fallthrough; /* extract the returned data length */ case 1: @@ -1992,7 +1992,7 @@ static int afs_deliver_fs_fetch_acl(struct afs_call *call) acl->size = call->count2; afs_extract_begin(call, acl->data, size); call->unmarshall++; - /* Fall through */ + fallthrough; /* extract the returned data */ case 2: @@ -2002,7 +2002,7 @@ static int afs_deliver_fs_fetch_acl(struct afs_call *call) afs_extract_to_buf(call, (21 + 6) * 4); call->unmarshall++; - /* Fall through */ + fallthrough; /* extract the metadata */ case 3: diff --git a/fs/afs/inode.c b/fs/afs/inode.c index 1d13d2e882ad..0fe8844b4bee 100644 --- a/fs/afs/inode.c +++ b/fs/afs/inode.c @@ -810,14 +810,32 @@ void afs_evict_inode(struct inode *inode) static void afs_setattr_success(struct afs_operation *op) { - struct inode *inode = &op->file[0].vnode->vfs_inode; + struct afs_vnode_param *vp = &op->file[0]; + struct inode *inode = &vp->vnode->vfs_inode; + loff_t old_i_size = i_size_read(inode); + + op->setattr.old_i_size = old_i_size; + afs_vnode_commit_status(op, vp); + /* inode->i_size has now been changed. */ + + if (op->setattr.attr->ia_valid & ATTR_SIZE) { + loff_t size = op->setattr.attr->ia_size; + if (size > old_i_size) + pagecache_isize_extended(inode, old_i_size, size); + } +} + +static void afs_setattr_edit_file(struct afs_operation *op) +{ + struct afs_vnode_param *vp = &op->file[0]; + struct inode *inode = &vp->vnode->vfs_inode; - afs_vnode_commit_status(op, &op->file[0]); if (op->setattr.attr->ia_valid & ATTR_SIZE) { - loff_t i_size = inode->i_size, size = op->setattr.attr->ia_size; - if (size > i_size) - pagecache_isize_extended(inode, i_size, size); - truncate_pagecache(inode, size); + loff_t size = op->setattr.attr->ia_size; + loff_t i_size = op->setattr.old_i_size; + + if (size < i_size) + truncate_pagecache(inode, size); } } @@ -825,6 +843,7 @@ static const struct afs_operation_ops afs_setattr_operation = { .issue_afs_rpc = afs_fs_setattr, .issue_yfs_rpc = yfs_fs_setattr, .success = afs_setattr_success, + .edit_dir = afs_setattr_edit_file, }; /* @@ -863,11 +882,16 @@ int afs_setattr(struct dentry *dentry, struct iattr *attr) if (S_ISREG(vnode->vfs_inode.i_mode)) filemap_write_and_wait(vnode->vfs_inode.i_mapping); + /* Prevent any new writebacks from starting whilst we do this. */ + down_write(&vnode->validate_lock); + op = afs_alloc_operation(((attr->ia_valid & ATTR_FILE) ? afs_file_key(attr->ia_file) : NULL), vnode->volume); - if (IS_ERR(op)) - return PTR_ERR(op); + if (IS_ERR(op)) { + ret = PTR_ERR(op); + goto out_unlock; + } afs_op_set_vnode(op, 0, vnode); op->setattr.attr = attr; @@ -880,5 +904,10 @@ int afs_setattr(struct dentry *dentry, struct iattr *attr) op->file[0].update_ctime = 1; op->ops = &afs_setattr_operation; - return afs_do_sync_operation(op); + ret = afs_do_sync_operation(op); + +out_unlock: + up_write(&vnode->validate_lock); + _leave(" = %d", ret); + return ret; } diff --git a/fs/afs/internal.h b/fs/afs/internal.h index 792ac711985e..81b0485fd22a 100644 --- a/fs/afs/internal.h +++ b/fs/afs/internal.h @@ -263,11 +263,11 @@ struct afs_net { /* Cell database */ struct rb_root cells; - struct afs_cell __rcu *ws_cell; + struct afs_cell *ws_cell; struct work_struct cells_manager; struct timer_list cells_timer; atomic_t cells_outstanding; - seqlock_t cells_lock; + struct rw_semaphore cells_lock; struct mutex cells_alias_lock; struct mutex proc_cells_lock; @@ -326,6 +326,7 @@ enum afs_cell_state { AFS_CELL_DEACTIVATING, AFS_CELL_INACTIVE, AFS_CELL_FAILED, + AFS_CELL_REMOVED, }; /* @@ -363,7 +364,8 @@ struct afs_cell { #endif time64_t dns_expiry; /* Time AFSDB/SRV record expires */ time64_t last_inactive; /* Time of last drop of usage count */ - atomic_t usage; + atomic_t ref; /* Struct refcount */ + atomic_t active; /* Active usage counter */ unsigned long flags; #define AFS_CELL_FL_NO_GC 0 /* The cell was added manually, don't auto-gc */ #define AFS_CELL_FL_DO_LOOKUP 1 /* DNS lookup requested */ @@ -373,6 +375,7 @@ struct afs_cell { enum dns_record_source dns_source:8; /* Latest source of data from lookup */ enum dns_lookup_status dns_status:8; /* Latest status of data from lookup */ unsigned int dns_lookup_count; /* Counter of DNS lookups */ + unsigned int debug_id; /* The volumes belonging to this cell */ struct rb_root volumes; /* Tree of volumes on this server */ @@ -401,22 +404,24 @@ struct afs_vlserver { #define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */ #define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */ #define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */ +#define AFS_VLSERVER_FL_RESPONDING 3 /* VL server is responding */ rwlock_t lock; /* Lock on addresses */ atomic_t usage; + unsigned int rtt; /* Server's current RTT in uS */ /* Probe state */ wait_queue_head_t probe_wq; atomic_t probe_outstanding; spinlock_t probe_lock; struct { - unsigned int rtt; /* RTT as ktime/64 */ + unsigned int rtt; /* RTT in uS */ u32 abort_code; short error; - bool have_result; - bool responded:1; - bool is_yfs:1; - bool not_yfs:1; - bool local_failure:1; + unsigned short flags; +#define AFS_VLSERVER_PROBE_RESPONDED 0x01 /* At least once response (may be abort) */ +#define AFS_VLSERVER_PROBE_IS_YFS 0x02 /* The peer appears to be YFS */ +#define AFS_VLSERVER_PROBE_NOT_YFS 0x04 /* The peer appears not to be YFS */ +#define AFS_VLSERVER_PROBE_LOCAL_FAILURE 0x08 /* A local failure prevented a probe */ } probe; u16 port; @@ -810,6 +815,7 @@ struct afs_operation { } store; struct { struct iattr *attr; + loff_t old_i_size; } setattr; struct afs_acl *acl; struct yfs_acl *yacl; @@ -914,11 +920,16 @@ static inline bool afs_cb_is_broken(unsigned int cb_break, * cell.c */ extern int afs_cell_init(struct afs_net *, const char *); -extern struct afs_cell *afs_lookup_cell_rcu(struct afs_net *, const char *, unsigned); +extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned, + enum afs_cell_trace); extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned, const char *, bool); -extern struct afs_cell *afs_get_cell(struct afs_cell *); -extern void afs_put_cell(struct afs_net *, struct afs_cell *); +extern struct afs_cell *afs_use_cell(struct afs_cell *, enum afs_cell_trace); +extern void afs_unuse_cell(struct afs_net *, struct afs_cell *, enum afs_cell_trace); +extern struct afs_cell *afs_get_cell(struct afs_cell *, enum afs_cell_trace); +extern void afs_see_cell(struct afs_cell *, enum afs_cell_trace); +extern void afs_put_cell(struct afs_cell *, enum afs_cell_trace); +extern void afs_queue_cell(struct afs_cell *, enum afs_cell_trace); extern void afs_manage_cells(struct work_struct *); extern void afs_cells_timer(struct timer_list *); extern void __net_exit afs_cell_purge(struct afs_net *); diff --git a/fs/afs/main.c b/fs/afs/main.c index 31b472f7c734..accdd8970e7c 100644 --- a/fs/afs/main.c +++ b/fs/afs/main.c @@ -78,7 +78,7 @@ static int __net_init afs_net_init(struct net *net_ns) mutex_init(&net->socket_mutex); net->cells = RB_ROOT; - seqlock_init(&net->cells_lock); + init_rwsem(&net->cells_lock); INIT_WORK(&net->cells_manager, afs_manage_cells); timer_setup(&net->cells_timer, afs_cells_timer, 0); diff --git a/fs/afs/misc.c b/fs/afs/misc.c index 5334f1bd2bca..1d1a8debe472 100644 --- a/fs/afs/misc.c +++ b/fs/afs/misc.c @@ -120,42 +120,42 @@ void afs_prioritise_error(struct afs_error *e, int error, u32 abort_code) if (e->error == -ETIMEDOUT || e->error == -ETIME) return; - /* Fall through */ + fallthrough; case -ETIMEDOUT: case -ETIME: if (e->error == -ENOMEM || e->error == -ENONET) return; - /* Fall through */ + fallthrough; case -ENOMEM: case -ENONET: if (e->error == -ERFKILL) return; - /* Fall through */ + fallthrough; case -ERFKILL: if (e->error == -EADDRNOTAVAIL) return; - /* Fall through */ + fallthrough; case -EADDRNOTAVAIL: if (e->error == -ENETUNREACH) return; - /* Fall through */ + fallthrough; case -ENETUNREACH: if (e->error == -EHOSTUNREACH) return; - /* Fall through */ + fallthrough; case -EHOSTUNREACH: if (e->error == -EHOSTDOWN) return; - /* Fall through */ + fallthrough; case -EHOSTDOWN: if (e->error == -ECONNREFUSED) return; - /* Fall through */ + fallthrough; case -ECONNREFUSED: if (e->error == -ECONNRESET) return; - /* Fall through */ + fallthrough; case -ECONNRESET: /* Responded, but call expired. */ if (e->responded) return; diff --git a/fs/afs/mntpt.c b/fs/afs/mntpt.c index 79bc5f1338ed..052dab2f5c03 100644 --- a/fs/afs/mntpt.c +++ b/fs/afs/mntpt.c @@ -88,7 +88,7 @@ static int afs_mntpt_set_params(struct fs_context *fc, struct dentry *mntpt) ctx->force = true; } if (ctx->cell) { - afs_put_cell(ctx->net, ctx->cell); + afs_unuse_cell(ctx->net, ctx->cell, afs_cell_trace_unuse_mntpt); ctx->cell = NULL; } if (test_bit(AFS_VNODE_PSEUDODIR, &vnode->flags)) { @@ -124,7 +124,7 @@ static int afs_mntpt_set_params(struct fs_context *fc, struct dentry *mntpt) char *buf; if (src_as->cell) - ctx->cell = afs_get_cell(src_as->cell); + ctx->cell = afs_use_cell(src_as->cell, afs_cell_trace_use_mntpt); if (size < 2 || size > PAGE_SIZE - 1) return -EINVAL; diff --git a/fs/afs/proc.c b/fs/afs/proc.c index e817fc740ba0..065a28bfa3f1 100644 --- a/fs/afs/proc.c +++ b/fs/afs/proc.c @@ -38,7 +38,7 @@ static int afs_proc_cells_show(struct seq_file *m, void *v) if (v == SEQ_START_TOKEN) { /* display header on line 1 */ - seq_puts(m, "USE TTL SV ST NAME\n"); + seq_puts(m, "USE ACT TTL SV ST NAME\n"); return 0; } @@ -46,10 +46,11 @@ static int afs_proc_cells_show(struct seq_file *m, void *v) vllist = rcu_dereference(cell->vl_servers); /* display one cell per line on subsequent lines */ - seq_printf(m, "%3u %6lld %2u %2u %s\n", - atomic_read(&cell->usage), + seq_printf(m, "%3u %3u %6lld %2u %2u %s\n", + atomic_read(&cell->ref), + atomic_read(&cell->active), cell->dns_expiry - ktime_get_real_seconds(), - vllist->nr_servers, + vllist ? vllist->nr_servers : 0, cell->state, cell->name); return 0; @@ -128,7 +129,7 @@ static int afs_proc_cells_write(struct file *file, char *buf, size_t size) } if (test_and_set_bit(AFS_CELL_FL_NO_GC, &cell->flags)) - afs_put_cell(net, cell); + afs_unuse_cell(net, cell, afs_cell_trace_unuse_no_pin); } else { goto inval; } @@ -154,13 +155,11 @@ static int afs_proc_rootcell_show(struct seq_file *m, void *v) struct afs_net *net; net = afs_seq2net_single(m); - if (rcu_access_pointer(net->ws_cell)) { - rcu_read_lock(); - cell = rcu_dereference(net->ws_cell); - if (cell) - seq_printf(m, "%s\n", cell->name); - rcu_read_unlock(); - } + down_read(&net->cells_lock); + cell = net->ws_cell; + if (cell) + seq_printf(m, "%s\n", cell->name); + up_read(&net->cells_lock); return 0; } @@ -310,6 +309,11 @@ static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v) alist->preferred == i ? '>' : '-', &alist->addrs[i].transport); } + seq_printf(m, " info: fl=%lx rtt=%d\n", vlserver->flags, vlserver->rtt); + seq_printf(m, " probe: fl=%x e=%d ac=%d out=%d\n", + vlserver->probe.flags, vlserver->probe.error, + vlserver->probe.abort_code, + atomic_read(&vlserver->probe_outstanding)); return 0; } diff --git a/fs/afs/rotate.c b/fs/afs/rotate.c index 6a0935cb822f..d83f13c44b92 100644 --- a/fs/afs/rotate.c +++ b/fs/afs/rotate.c @@ -281,7 +281,7 @@ bool afs_select_fileserver(struct afs_operation *op) case -ETIME: if (op->error != -EDESTADDRREQ) goto iterate_address; - /* Fall through */ + fallthrough; case -ERFKILL: case -EADDRNOTAVAIL: case -ENETUNREACH: diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c index 8fc8fb406a5a..8be709cb8542 100644 --- a/fs/afs/rxrpc.c +++ b/fs/afs/rxrpc.c @@ -568,7 +568,7 @@ static void afs_deliver_to_call(struct afs_call *call) case -EIO: pr_err("kAFS: Call %u in bad state %u\n", call->debug_id, state); - /* Fall through */ + fallthrough; case -ENODATA: case -EBADMSG: case -EMSGSIZE: @@ -669,7 +669,7 @@ long afs_wait_for_call_to_complete(struct afs_call *call, ret = call->ret0; call->ret0 = 0; - /* Fall through */ + fallthrough; case -ECONNABORTED: ac->responded = true; break; @@ -872,7 +872,7 @@ void afs_send_empty_reply(struct afs_call *call) _debug("oom"); rxrpc_kernel_abort_call(net->socket, call->rxcall, RX_USER_ABORT, -ENOMEM, "KOO"); - /* Fall through */ + fallthrough; default: _leave(" [error]"); return; diff --git a/fs/afs/server.c b/fs/afs/server.c index e82e452e2612..684a2b02b9ff 100644 --- a/fs/afs/server.c +++ b/fs/afs/server.c @@ -550,7 +550,12 @@ void afs_manage_servers(struct work_struct *work) _debug("manage %pU %u", &server->uuid, active); - ASSERTIFCMP(purging, active, ==, 0); + if (purging) { + trace_afs_server(server, atomic_read(&server->ref), + active, afs_server_trace_purging); + if (active != 0) + pr_notice("Can't purge s=%08x\n", server->debug_id); + } if (active == 0) { time64_t expire_at = server->unuse_time; diff --git a/fs/afs/super.c b/fs/afs/super.c index b552357b1d13..6c5900df6aa5 100644 --- a/fs/afs/super.c +++ b/fs/afs/super.c @@ -294,7 +294,8 @@ static int afs_parse_source(struct fs_context *fc, struct fs_parameter *param) cellnamesz, cellnamesz, cellname ?: ""); return PTR_ERR(cell); } - afs_put_cell(ctx->net, ctx->cell); + afs_unuse_cell(ctx->net, ctx->cell, afs_cell_trace_unuse_parse); + afs_see_cell(cell, afs_cell_trace_see_source); ctx->cell = cell; } @@ -389,8 +390,9 @@ static int afs_validate_fc(struct fs_context *fc) _debug("switch to alias"); key_put(ctx->key); ctx->key = NULL; - cell = afs_get_cell(ctx->cell->alias_of); - afs_put_cell(ctx->net, ctx->cell); + cell = afs_use_cell(ctx->cell->alias_of, + afs_cell_trace_use_fc_alias); + afs_unuse_cell(ctx->net, ctx->cell, afs_cell_trace_unuse_fc); ctx->cell = cell; goto reget_key; } @@ -456,7 +458,6 @@ static int afs_fill_super(struct super_block *sb, struct afs_fs_context *ctx) ret = super_setup_bdi(sb); if (ret) return ret; - sb->s_bdi->ra_pages = VM_READAHEAD_PAGES; /* allocate the root inode and dentry */ if (as->dyn_root) { @@ -508,7 +509,7 @@ static struct afs_super_info *afs_alloc_sbi(struct fs_context *fc) if (ctx->dyn_root) { as->dyn_root = true; } else { - as->cell = afs_get_cell(ctx->cell); + as->cell = afs_use_cell(ctx->cell, afs_cell_trace_use_sbi); as->volume = afs_get_volume(ctx->volume, afs_volume_trace_get_alloc_sbi); } @@ -521,7 +522,7 @@ static void afs_destroy_sbi(struct afs_super_info *as) if (as) { struct afs_net *net = afs_net(as->net_ns); afs_put_volume(net, as->volume, afs_volume_trace_put_destroy_sbi); - afs_put_cell(net, as->cell); + afs_unuse_cell(net, as->cell, afs_cell_trace_unuse_sbi); put_net(as->net_ns); kfree(as); } @@ -607,7 +608,7 @@ static void afs_free_fc(struct fs_context *fc) afs_destroy_sbi(fc->s_fs_info); afs_put_volume(ctx->net, ctx->volume, afs_volume_trace_put_free_fc); - afs_put_cell(ctx->net, ctx->cell); + afs_unuse_cell(ctx->net, ctx->cell, afs_cell_trace_unuse_fc); key_put(ctx->key); kfree(ctx); } @@ -634,9 +635,7 @@ static int afs_init_fs_context(struct fs_context *fc) ctx->net = afs_net(fc->net_ns); /* Default to the workstation cell. */ - rcu_read_lock(); - cell = afs_lookup_cell_rcu(ctx->net, NULL, 0); - rcu_read_unlock(); + cell = afs_find_cell(ctx->net, NULL, 0, afs_cell_trace_use_fc); if (IS_ERR(cell)) cell = NULL; ctx->cell = cell; diff --git a/fs/afs/vl_alias.c b/fs/afs/vl_alias.c index 5082ef04e99c..f04a80e4f5c3 100644 --- a/fs/afs/vl_alias.c +++ b/fs/afs/vl_alias.c @@ -177,7 +177,7 @@ static int afs_compare_cell_roots(struct afs_cell *cell) is_alias: rcu_read_unlock(); - cell->alias_of = afs_get_cell(p); + cell->alias_of = afs_use_cell(p, afs_cell_trace_use_alias); return 1; } @@ -247,18 +247,18 @@ static int afs_query_for_alias(struct afs_cell *cell, struct key *key) continue; if (p->root_volume) continue; /* Ignore cells that have a root.cell volume. */ - afs_get_cell(p); + afs_use_cell(p, afs_cell_trace_use_check_alias); mutex_unlock(&cell->net->proc_cells_lock); if (afs_query_for_alias_one(cell, key, p) != 0) goto is_alias; if (mutex_lock_interruptible(&cell->net->proc_cells_lock) < 0) { - afs_put_cell(cell->net, p); + afs_unuse_cell(cell->net, p, afs_cell_trace_unuse_check_alias); return -ERESTARTSYS; } - afs_put_cell(cell->net, p); + afs_unuse_cell(cell->net, p, afs_cell_trace_unuse_check_alias); } mutex_unlock(&cell->net->proc_cells_lock); diff --git a/fs/afs/vl_list.c b/fs/afs/vl_list.c index 8fea54eba0c2..38b2ba1d9ec0 100644 --- a/fs/afs/vl_list.c +++ b/fs/afs/vl_list.c @@ -21,6 +21,7 @@ struct afs_vlserver *afs_alloc_vlserver(const char *name, size_t name_len, rwlock_init(&vlserver->lock); init_waitqueue_head(&vlserver->probe_wq); spin_lock_init(&vlserver->probe_lock); + vlserver->rtt = UINT_MAX; vlserver->name_len = name_len; vlserver->port = port; memcpy(vlserver->name, name, name_len); diff --git a/fs/afs/vl_probe.c b/fs/afs/vl_probe.c index e3aa013c2177..d1c7068b4346 100644 --- a/fs/afs/vl_probe.c +++ b/fs/afs/vl_probe.c @@ -11,15 +11,33 @@ #include "internal.h" #include "protocol_yfs.h" -static bool afs_vl_probe_done(struct afs_vlserver *server) + +/* + * Handle the completion of a set of probes. + */ +static void afs_finished_vl_probe(struct afs_vlserver *server) { - if (!atomic_dec_and_test(&server->probe_outstanding)) - return false; + if (!(server->probe.flags & AFS_VLSERVER_PROBE_RESPONDED)) { + server->rtt = UINT_MAX; + clear_bit(AFS_VLSERVER_FL_RESPONDING, &server->flags); + } - wake_up_var(&server->probe_outstanding); clear_bit_unlock(AFS_VLSERVER_FL_PROBING, &server->flags); wake_up_bit(&server->flags, AFS_VLSERVER_FL_PROBING); - return true; +} + +/* + * Handle the completion of a probe RPC call. + */ +static void afs_done_one_vl_probe(struct afs_vlserver *server, bool wake_up) +{ + if (atomic_dec_and_test(&server->probe_outstanding)) { + afs_finished_vl_probe(server); + wake_up = true; + } + + if (wake_up) + wake_up_all(&server->probe_wq); } /* @@ -45,15 +63,20 @@ void afs_vlserver_probe_result(struct afs_call *call) server->probe.error = 0; goto responded; case -ECONNABORTED: - if (!server->probe.responded) { + if (!(server->probe.flags & AFS_VLSERVER_PROBE_RESPONDED)) { server->probe.abort_code = call->abort_code; server->probe.error = ret; } goto responded; case -ENOMEM: case -ENONET: - server->probe.local_failure = true; - afs_io_error(call, afs_io_error_vl_probe_fail); + case -EKEYEXPIRED: + case -EKEYREVOKED: + case -EKEYREJECTED: + server->probe.flags |= AFS_VLSERVER_PROBE_LOCAL_FAILURE; + if (server->probe.error == 0) + server->probe.error = ret; + trace_afs_io_error(call->debug_id, ret, afs_io_error_vl_probe_fail); goto out; case -ECONNRESET: /* Responded, but call expired. */ case -ERFKILL: @@ -67,12 +90,12 @@ void afs_vlserver_probe_result(struct afs_call *call) default: clear_bit(index, &alist->responded); set_bit(index, &alist->failed); - if (!server->probe.responded && + if (!(server->probe.flags & AFS_VLSERVER_PROBE_RESPONDED) && (server->probe.error == 0 || server->probe.error == -ETIMEDOUT || server->probe.error == -ETIME)) server->probe.error = ret; - afs_io_error(call, afs_io_error_vl_probe_fail); + trace_afs_io_error(call->debug_id, ret, afs_io_error_vl_probe_fail); goto out; } @@ -81,39 +104,36 @@ responded: clear_bit(index, &alist->failed); if (call->service_id == YFS_VL_SERVICE) { - server->probe.is_yfs = true; + server->probe.flags |= AFS_VLSERVER_PROBE_IS_YFS; set_bit(AFS_VLSERVER_FL_IS_YFS, &server->flags); alist->addrs[index].srx_service = call->service_id; } else { - server->probe.not_yfs = true; - if (!server->probe.is_yfs) { + server->probe.flags |= AFS_VLSERVER_PROBE_NOT_YFS; + if (!(server->probe.flags & AFS_VLSERVER_PROBE_IS_YFS)) { clear_bit(AFS_VLSERVER_FL_IS_YFS, &server->flags); alist->addrs[index].srx_service = call->service_id; } } - rtt_us = rxrpc_kernel_get_srtt(call->net->socket, call->rxcall); - if (rtt_us < server->probe.rtt) { + if (rxrpc_kernel_get_srtt(call->net->socket, call->rxcall, &rtt_us) && + rtt_us < server->probe.rtt) { server->probe.rtt = rtt_us; + server->rtt = rtt_us; alist->preferred = index; - have_result = true; } smp_wmb(); /* Set rtt before responded. */ - server->probe.responded = true; + server->probe.flags |= AFS_VLSERVER_PROBE_RESPONDED; set_bit(AFS_VLSERVER_FL_PROBED, &server->flags); + set_bit(AFS_VLSERVER_FL_RESPONDING, &server->flags); + have_result = true; out: spin_unlock(&server->probe_lock); _debug("probe [%u][%u] %pISpc rtt=%u ret=%d", server_index, index, &alist->addrs[index].transport, rtt_us, ret); - have_result |= afs_vl_probe_done(server); - if (have_result) { - server->probe.have_result = true; - wake_up_var(&server->probe.have_result); - wake_up_all(&server->probe_wq); - } + afs_done_one_vl_probe(server, have_result); } /* @@ -151,11 +171,10 @@ static bool afs_do_probe_vlserver(struct afs_net *net, in_progress = true; } else { afs_prioritise_error(_e, PTR_ERR(call), ac.abort_code); + afs_done_one_vl_probe(server, false); } } - if (!in_progress) - afs_vl_probe_done(server); return in_progress; } @@ -193,7 +212,7 @@ int afs_wait_for_vl_probes(struct afs_vlserver_list *vllist, { struct wait_queue_entry *waits; struct afs_vlserver *server; - unsigned int rtt = UINT_MAX; + unsigned int rtt = UINT_MAX, rtt_s; bool have_responders = false; int pref = -1, i; @@ -205,7 +224,7 @@ int afs_wait_for_vl_probes(struct afs_vlserver_list *vllist, server = vllist->servers[i].server; if (!test_bit(AFS_VLSERVER_FL_PROBING, &server->flags)) __clear_bit(i, &untried); - if (server->probe.responded) + if (server->probe.flags & AFS_VLSERVER_PROBE_RESPONDED) have_responders = true; } } @@ -231,7 +250,7 @@ int afs_wait_for_vl_probes(struct afs_vlserver_list *vllist, for (i = 0; i < vllist->nr_servers; i++) { if (test_bit(i, &untried)) { server = vllist->servers[i].server; - if (server->probe.responded) + if (server->probe.flags & AFS_VLSERVER_PROBE_RESPONDED) goto stop; if (test_bit(AFS_VLSERVER_FL_PROBING, &server->flags)) still_probing = true; @@ -249,10 +268,11 @@ stop: for (i = 0; i < vllist->nr_servers; i++) { if (test_bit(i, &untried)) { server = vllist->servers[i].server; - if (server->probe.responded && - server->probe.rtt < rtt) { + rtt_s = READ_ONCE(server->rtt); + if (test_bit(AFS_VLSERVER_FL_RESPONDING, &server->flags) && + rtt_s < rtt) { pref = i; - rtt = server->probe.rtt; + rtt = rtt_s; } remove_wait_queue(&server->probe_wq, &waits[i]); diff --git a/fs/afs/vl_rotate.c b/fs/afs/vl_rotate.c index f405ca8b240a..488e58490b16 100644 --- a/fs/afs/vl_rotate.c +++ b/fs/afs/vl_rotate.c @@ -45,7 +45,7 @@ static bool afs_start_vl_iteration(struct afs_vl_cursor *vc) cell->dns_expiry <= ktime_get_real_seconds()) { dns_lookup_count = smp_load_acquire(&cell->dns_lookup_count); set_bit(AFS_CELL_FL_DO_LOOKUP, &cell->flags); - queue_work(afs_wq, &cell->manager); + afs_queue_cell(cell, afs_cell_trace_get_queue_dns); if (cell->dns_source == DNS_RECORD_UNAVAILABLE) { if (wait_var_event_interruptible( @@ -192,7 +192,8 @@ pick_server: for (i = 0; i < vc->server_list->nr_servers; i++) { struct afs_vlserver *s = vc->server_list->servers[i].server; - if (!test_bit(i, &vc->untried) || !s->probe.responded) + if (!test_bit(i, &vc->untried) || + !test_bit(AFS_VLSERVER_FL_RESPONDING, &s->flags)) continue; if (s->probe.rtt < rtt) { vc->index = i; @@ -262,10 +263,14 @@ no_more_servers: for (i = 0; i < vc->server_list->nr_servers; i++) { struct afs_vlserver *s = vc->server_list->servers[i].server; + if (test_bit(AFS_VLSERVER_FL_RESPONDING, &s->flags)) + e.responded = true; afs_prioritise_error(&e, READ_ONCE(s->probe.error), s->probe.abort_code); } + error = e.error; + failed_set_error: vc->error = error; failed: diff --git a/fs/afs/vlclient.c b/fs/afs/vlclient.c index fd82850cd424..dc9327332f06 100644 --- a/fs/afs/vlclient.c +++ b/fs/afs/vlclient.c @@ -196,7 +196,7 @@ static int afs_deliver_vl_get_addrs_u(struct afs_call *call) /* Extract the returned uuid, uniquifier, nentries and * blkaddrs size */ - /* Fall through */ + fallthrough; case 1: ret = afs_extract_data(call, true); if (ret < 0) @@ -221,7 +221,7 @@ static int afs_deliver_vl_get_addrs_u(struct afs_call *call) count = min(call->count, 4U); afs_extract_to_buf(call, count * sizeof(__be32)); - /* Fall through - and extract entries */ + fallthrough; /* and extract entries */ case 2: ret = afs_extract_data(call, call->count > 4); if (ret < 0) @@ -324,7 +324,7 @@ static int afs_deliver_vl_get_capabilities(struct afs_call *call) afs_extract_to_tmp(call); call->unmarshall++; - /* Fall through - and extract the capabilities word count */ + fallthrough; /* and extract the capabilities word count */ case 1: ret = afs_extract_data(call, true); if (ret < 0) @@ -337,7 +337,7 @@ static int afs_deliver_vl_get_capabilities(struct afs_call *call) call->unmarshall++; afs_extract_discard(call, count * sizeof(__be32)); - /* Fall through - and extract capabilities words */ + fallthrough; /* and extract capabilities words */ case 2: ret = afs_extract_data(call, false); if (ret < 0) @@ -436,7 +436,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call) /* Extract the returned uuid, uniquifier, fsEndpoints count and * either the first fsEndpoint type or the volEndpoints * count if there are no fsEndpoints. */ - /* Fall through */ + fallthrough; case 1: ret = afs_extract_data(call, true); if (ret < 0) @@ -475,7 +475,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call) afs_extract_to_buf(call, size); call->unmarshall = 2; - /* Fall through - and extract fsEndpoints[] entries */ + fallthrough; /* and extract fsEndpoints[] entries */ case 2: ret = afs_extract_data(call, true); if (ret < 0) @@ -526,7 +526,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call) * extract the type of the next endpoint when we extract the * data of the current one, but this is the first... */ - /* Fall through */ + fallthrough; case 3: ret = afs_extract_data(call, true); if (ret < 0) @@ -552,7 +552,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call) afs_extract_to_buf(call, size); call->unmarshall = 4; - /* Fall through - and extract volEndpoints[] entries */ + fallthrough; /* and extract volEndpoints[] entries */ case 4: ret = afs_extract_data(call, true); if (ret < 0) @@ -587,7 +587,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call) afs_extract_discard(call, 0); call->unmarshall = 5; - /* Fall through - Done */ + fallthrough; /* Done */ case 5: ret = afs_extract_data(call, false); if (ret < 0) @@ -663,7 +663,7 @@ static int afs_deliver_yfsvl_get_cell_name(struct afs_call *call) afs_extract_to_tmp(call); call->unmarshall++; - /* Fall through - and extract the cell name length */ + fallthrough; /* and extract the cell name length */ case 1: ret = afs_extract_data(call, true); if (ret < 0) @@ -685,7 +685,7 @@ static int afs_deliver_yfsvl_get_cell_name(struct afs_call *call) afs_extract_begin(call, cell_name, namesz); call->unmarshall++; - /* Fall through - and extract cell name */ + fallthrough; /* and extract cell name */ case 2: ret = afs_extract_data(call, true); if (ret < 0) @@ -694,7 +694,7 @@ static int afs_deliver_yfsvl_get_cell_name(struct afs_call *call) afs_extract_discard(call, call->count2); call->unmarshall++; - /* Fall through - and extract padding */ + fallthrough; /* and extract padding */ case 3: ret = afs_extract_data(call, false); if (ret < 0) diff --git a/fs/afs/volume.c b/fs/afs/volume.c index 9bc0509e3634..f84194b791d3 100644 --- a/fs/afs/volume.c +++ b/fs/afs/volume.c @@ -83,7 +83,7 @@ static struct afs_volume *afs_alloc_volume(struct afs_fs_context *params, volume->vid = vldb->vid[params->type]; volume->update_at = ktime_get_real_seconds() + afs_volume_record_life; - volume->cell = afs_get_cell(params->cell); + volume->cell = afs_get_cell(params->cell, afs_cell_trace_get_vol); volume->type = params->type; volume->type_force = params->force; volume->name_len = vldb->name_len; @@ -106,7 +106,7 @@ static struct afs_volume *afs_alloc_volume(struct afs_fs_context *params, return volume; error_1: - afs_put_cell(params->net, volume->cell); + afs_put_cell(volume->cell, afs_cell_trace_put_vol); kfree(volume); error_0: return ERR_PTR(ret); @@ -228,7 +228,7 @@ static void afs_destroy_volume(struct afs_net *net, struct afs_volume *volume) afs_remove_volume_from_cell(volume); afs_put_serverlist(net, rcu_access_pointer(volume->servers)); - afs_put_cell(net, volume->cell); + afs_put_cell(volume->cell, afs_cell_trace_put_vol); trace_afs_volume(volume->vid, atomic_read(&volume->usage), afs_volume_trace_free); kfree_rcu(volume, rcu); diff --git a/fs/afs/write.c b/fs/afs/write.c index a121c247d95a..da12abd6db21 100644 --- a/fs/afs/write.c +++ b/fs/afs/write.c @@ -609,7 +609,7 @@ no_more: default: pr_notice("kAFS: Unexpected error from FS.StoreData %d\n", ret); - /* Fall through */ + fallthrough; case -EACCES: case -EPERM: case -ENOKEY: @@ -738,11 +738,21 @@ static int afs_writepages_region(struct address_space *mapping, int afs_writepages(struct address_space *mapping, struct writeback_control *wbc) { + struct afs_vnode *vnode = AFS_FS_I(mapping->host); pgoff_t start, end, next; int ret; _enter(""); + /* We have to be careful as we can end up racing with setattr() + * truncating the pagecache since the caller doesn't take a lock here + * to prevent it. + */ + if (wbc->sync_mode == WB_SYNC_ALL) + down_read(&vnode->validate_lock); + else if (!down_read_trylock(&vnode->validate_lock)) + return 0; + if (wbc->range_cyclic) { start = mapping->writeback_index; end = -1; @@ -762,6 +772,7 @@ int afs_writepages(struct address_space *mapping, ret = afs_writepages_region(mapping, wbc, start, end, &next); } + up_read(&vnode->validate_lock); _leave(" = %d", ret); return ret; } diff --git a/fs/afs/yfsclient.c b/fs/afs/yfsclient.c index 8c24fdc899e3..3b1239b7e90d 100644 --- a/fs/afs/yfsclient.c +++ b/fs/afs/yfsclient.c @@ -373,7 +373,7 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call) req->offset = req->pos & (PAGE_SIZE - 1); afs_extract_to_tmp64(call); call->unmarshall++; - /* Fall through */ + fallthrough; /* extract the returned data length */ case 1: @@ -401,7 +401,7 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call) call->bvec[0].bv_page = req->pages[req->index]; iov_iter_bvec(&call->def_iter, READ, call->bvec, 1, size); ASSERTCMP(size, <=, PAGE_SIZE); - /* Fall through */ + fallthrough; /* extract the returned data */ case 2: @@ -428,7 +428,7 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call) /* Discard any excess data the server gave us */ afs_extract_discard(call, req->actual_len - req->len); call->unmarshall = 3; - /* Fall through */ + fallthrough; case 3: _debug("extract discard %zu/%llu", @@ -444,7 +444,7 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call) sizeof(struct yfs_xdr_YFSFetchStatus) + sizeof(struct yfs_xdr_YFSCallBack) + sizeof(struct yfs_xdr_YFSVolSync)); - /* Fall through */ + fallthrough; /* extract the metadata */ case 4: @@ -461,7 +461,7 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call) req->file_size = vp->scb.status.size; call->unmarshall++; - /* Fall through */ + fallthrough; case 5: break; @@ -1262,7 +1262,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call) case 0: call->unmarshall++; afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchVolumeStatus)); - /* Fall through */ + fallthrough; /* extract the returned status record */ case 1: @@ -1275,7 +1275,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call) xdr_decode_YFSFetchVolumeStatus(&bp, &op->volstatus.vs); call->unmarshall++; afs_extract_to_tmp(call); - /* Fall through */ + fallthrough; /* extract the volume name length */ case 2: @@ -1290,7 +1290,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call) size = (call->count + 3) & ~3; /* It's padded */ afs_extract_to_buf(call, size); call->unmarshall++; - /* Fall through */ + fallthrough; /* extract the volume name */ case 3: @@ -1304,7 +1304,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call) _debug("volname '%s'", p); afs_extract_to_tmp(call); call->unmarshall++; - /* Fall through */ + fallthrough; /* extract the offline message length */ case 4: @@ -1319,7 +1319,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call) size = (call->count + 3) & ~3; /* It's padded */ afs_extract_to_buf(call, size); call->unmarshall++; - /* Fall through */ + fallthrough; /* extract the offline message */ case 5: @@ -1334,7 +1334,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call) afs_extract_to_tmp(call); call->unmarshall++; - /* Fall through */ + fallthrough; /* extract the message of the day length */ case 6: @@ -1349,7 +1349,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call) size = (call->count + 3) & ~3; /* It's padded */ afs_extract_to_buf(call, size); call->unmarshall++; - /* Fall through */ + fallthrough; /* extract the message of the day */ case 7: @@ -1363,7 +1363,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call) _debug("motd '%s'", p); call->unmarshall++; - /* Fall through */ + fallthrough; case 8: break; @@ -1622,7 +1622,7 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call) case 0: afs_extract_to_tmp(call); call->unmarshall++; - /* Fall through */ + fallthrough; /* Extract the file status count and array in two steps */ case 1: @@ -1640,7 +1640,7 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call) call->unmarshall++; more_counts: afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchStatus)); - /* Fall through */ + fallthrough; case 2: _debug("extract status array %u", call->count); @@ -1670,7 +1670,7 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call) call->count = 0; call->unmarshall++; afs_extract_to_tmp(call); - /* Fall through */ + fallthrough; /* Extract the callback count and array in two steps */ case 3: @@ -1687,7 +1687,7 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call) call->unmarshall++; more_cbs: afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSCallBack)); - /* Fall through */ + fallthrough; case 4: _debug("extract CB array"); @@ -1716,7 +1716,7 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call) afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSVolSync)); call->unmarshall++; - /* Fall through */ + fallthrough; case 5: ret = afs_extract_data(call, false); @@ -1727,7 +1727,7 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call) xdr_decode_YFSVolSync(&bp, &op->volsync); call->unmarshall++; - /* Fall through */ + fallthrough; case 6: break; @@ -1804,7 +1804,7 @@ static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call) case 0: afs_extract_to_tmp(call); call->unmarshall++; - /* Fall through */ + fallthrough; /* Extract the file ACL length */ case 1: @@ -1826,7 +1826,7 @@ static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call) afs_extract_discard(call, size); } call->unmarshall++; - /* Fall through */ + fallthrough; /* Extract the file ACL */ case 2: @@ -1836,7 +1836,7 @@ static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call) afs_extract_to_tmp(call); call->unmarshall++; - /* Fall through */ + fallthrough; /* Extract the volume ACL length */ case 3: @@ -1858,7 +1858,7 @@ static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call) afs_extract_discard(call, size); } call->unmarshall++; - /* Fall through */ + fallthrough; /* Extract the volume ACL */ case 4: @@ -1871,7 +1871,7 @@ static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call) sizeof(struct yfs_xdr_YFSFetchStatus) + sizeof(struct yfs_xdr_YFSVolSync)); call->unmarshall++; - /* Fall through */ + fallthrough; /* extract the metadata */ case 5: @@ -1886,7 +1886,7 @@ static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call) xdr_decode_YFSVolSync(&bp, &op->volsync); call->unmarshall++; - /* Fall through */ + fallthrough; case 6: break; |