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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-21 19:05:45 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-21 19:05:45 -0800 |
| commit | df32e43a54d04eda35d2859beaf90e3864d53288 (patch) | |
| tree | 7a61cf658b2949bd426285eb9902be7758ced1ba /fs | |
| parent | fbd918a2026d0464ce9c23f57b7de4bcfccdc2e6 (diff) | |
| parent | 78d5506e82b21a1a1de68c24182db2c2fe521422 (diff) | |
| download | op-kernel-dev-df32e43a54d04eda35d2859beaf90e3864d53288.zip op-kernel-dev-df32e43a54d04eda35d2859beaf90e3864d53288.tar.gz | |
Merge branch 'akpm' (incoming from Andrew)
Merge first patch-bomb from Andrew Morton:
- a couple of misc things
- inotify/fsnotify work from Jan
- ocfs2 updates (partial)
- about half of MM
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (117 commits)
mm/migrate: remove unused function, fail_migrate_page()
mm/migrate: remove putback_lru_pages, fix comment on putback_movable_pages
mm/migrate: correct failure handling if !hugepage_migration_support()
mm/migrate: add comment about permanent failure path
mm, page_alloc: warn for non-blockable __GFP_NOFAIL allocation failure
mm: compaction: reset scanner positions immediately when they meet
mm: compaction: do not mark unmovable pageblocks as skipped in async compaction
mm: compaction: detect when scanners meet in isolate_freepages
mm: compaction: reset cached scanner pfn's before reading them
mm: compaction: encapsulate defer reset logic
mm: compaction: trace compaction begin and end
memcg, oom: lock mem_cgroup_print_oom_info
sched: add tracepoints related to NUMA task migration
mm: numa: do not automatically migrate KSM pages
mm: numa: trace tasks that fail migration due to rate limiting
mm: numa: limit scope of lock for NUMA migrate rate limiting
mm: numa: make NUMA-migrate related functions static
lib/show_mem.c: show num_poisoned_pages when oom
mm/hwpoison: add '#' to hwpoison_inject
mm/memblock: use WARN_ONCE when MAX_NUMNODES passed as input parameter
...
Diffstat (limited to 'fs')
44 files changed, 775 insertions, 1147 deletions
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c index dc52e13..3881610 100644 --- a/fs/compat_ioctl.c +++ b/fs/compat_ioctl.c @@ -680,7 +680,8 @@ static int do_i2c_rdwr_ioctl(unsigned int fd, unsigned int cmd, struct i2c_msg __user *tmsgs; struct i2c_msg32 __user *umsgs; compat_caddr_t datap; - int nmsgs, i; + u32 nmsgs; + int i; if (get_user(nmsgs, &udata->nmsgs)) return -EFAULT; diff --git a/fs/notify/dnotify/dnotify.c b/fs/notify/dnotify/dnotify.c index 1fedd5f..0b9ff43 100644 --- a/fs/notify/dnotify/dnotify.c +++ b/fs/notify/dnotify/dnotify.c @@ -82,20 +82,23 @@ static void dnotify_recalc_inode_mask(struct fsnotify_mark *fsn_mark) * events. */ static int dnotify_handle_event(struct fsnotify_group *group, + struct inode *inode, struct fsnotify_mark *inode_mark, struct fsnotify_mark *vfsmount_mark, - struct fsnotify_event *event) + u32 mask, void *data, int data_type, + const unsigned char *file_name) { struct dnotify_mark *dn_mark; - struct inode *to_tell; struct dnotify_struct *dn; struct dnotify_struct **prev; struct fown_struct *fown; - __u32 test_mask = event->mask & ~FS_EVENT_ON_CHILD; + __u32 test_mask = mask & ~FS_EVENT_ON_CHILD; - BUG_ON(vfsmount_mark); + /* not a dir, dnotify doesn't care */ + if (!S_ISDIR(inode->i_mode)) + return 0; - to_tell = event->to_tell; + BUG_ON(vfsmount_mark); dn_mark = container_of(inode_mark, struct dnotify_mark, fsn_mark); @@ -122,23 +125,6 @@ static int dnotify_handle_event(struct fsnotify_group *group, return 0; } -/* - * Given an inode and mask determine if dnotify would be interested in sending - * userspace notification for that pair. - */ -static bool dnotify_should_send_event(struct fsnotify_group *group, - struct inode *inode, - struct fsnotify_mark *inode_mark, - struct fsnotify_mark *vfsmount_mark, - __u32 mask, void *data, int data_type) -{ - /* not a dir, dnotify doesn't care */ - if (!S_ISDIR(inode->i_mode)) - return false; - - return true; -} - static void dnotify_free_mark(struct fsnotify_mark *fsn_mark) { struct dnotify_mark *dn_mark = container_of(fsn_mark, @@ -152,10 +138,6 @@ static void dnotify_free_mark(struct fsnotify_mark *fsn_mark) static struct fsnotify_ops dnotify_fsnotify_ops = { .handle_event = dnotify_handle_event, - .should_send_event = dnotify_should_send_event, - .free_group_priv = NULL, - .freeing_mark = NULL, - .free_event_priv = NULL, }; /* diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c index 0c2f912..5877262 100644 --- a/fs/notify/fanotify/fanotify.c +++ b/fs/notify/fanotify/fanotify.c @@ -9,31 +9,27 @@ #include <linux/types.h> #include <linux/wait.h> -static bool should_merge(struct fsnotify_event *old, struct fsnotify_event *new) +#include "fanotify.h" + +static bool should_merge(struct fsnotify_event *old_fsn, + struct fsnotify_event *new_fsn) { - pr_debug("%s: old=%p new=%p\n", __func__, old, new); + struct fanotify_event_info *old, *new; - if (old->to_tell == new->to_tell && - old->data_type == new->data_type && - old->tgid == new->tgid) { - switch (old->data_type) { - case (FSNOTIFY_EVENT_PATH): #ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS - /* dont merge two permission events */ - if ((old->mask & FAN_ALL_PERM_EVENTS) && - (new->mask & FAN_ALL_PERM_EVENTS)) - return false; + /* dont merge two permission events */ + if ((old_fsn->mask & FAN_ALL_PERM_EVENTS) && + (new_fsn->mask & FAN_ALL_PERM_EVENTS)) + return false; #endif - if ((old->path.mnt == new->path.mnt) && - (old->path.dentry == new->path.dentry)) - return true; - break; - case (FSNOTIFY_EVENT_NONE): - return true; - default: - BUG(); - }; - } + pr_debug("%s: old=%p new=%p\n", __func__, old_fsn, new_fsn); + old = FANOTIFY_E(old_fsn); + new = FANOTIFY_E(new_fsn); + + if (old_fsn->inode == new_fsn->inode && old->tgid == new->tgid && + old->path.mnt == new->path.mnt && + old->path.dentry == new->path.dentry) + return true; return false; } @@ -41,59 +37,28 @@ static bool should_merge(struct fsnotify_event *old, struct fsnotify_event *new) static struct fsnotify_event *fanotify_merge(struct list_head *list, struct fsnotify_event *event) { - struct fsnotify_event_holder *test_holder; - struct fsnotify_event *test_event = NULL; - struct fsnotify_event *new_event; + struct fsnotify_event *test_event; + bool do_merge = false; pr_debug("%s: list=%p event=%p\n", __func__, list, event); - - list_for_each_entry_reverse(test_holder, list, event_list) { - if (should_merge(test_holder->event, event)) { - test_event = test_holder->event; + list_for_each_entry_reverse(test_event, list, list) { + if (should_merge(test_event, event)) { + do_merge = true; break; } } - if (!test_event) + if (!do_merge) return NULL; - fsnotify_get_event(test_event); - - /* if they are exactly the same we are done */ - if (test_event->mask == event->mask) - return test_event; - - /* - * if the refcnt == 2 this is the only queue - * for this event and so we can update the mask - * in place. - */ - if (atomic_read(&test_event->refcnt) == 2) { - test_event->mask |= event->mask; - return test_event; - } - - new_event = fsnotify_clone_event(test_event); - - /* done with test_event */ - fsnotify_put_event(test_event); - - /* couldn't allocate memory, merge was not possible */ - if (unlikely(!new_event)) - return ERR_PTR(-ENOMEM); - - /* build new event and replace it on the list */ - new_event->mask = (test_event->mask | event->mask); - fsnotify_replace_event(test_holder, new_event); - - /* we hold a reference on new_event from clone_event */ - return new_event; + test_event->mask |= event->mask; + return test_event; } #ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS static int fanotify_get_response_from_access(struct fsnotify_group *group, - struct fsnotify_event *event) + struct fanotify_event_info *event) { int ret; @@ -106,7 +71,6 @@ static int fanotify_get_response_from_access(struct fsnotify_group *group, return 0; /* userspace responded, convert to something usable */ - spin_lock(&event->lock); switch (event->response) { case FAN_ALLOW: ret = 0; @@ -116,7 +80,6 @@ static int fanotify_get_response_from_access(struct fsnotify_group *group, ret = -EPERM; } event->response = 0; - spin_unlock(&event->lock); pr_debug("%s: group=%p event=%p about to return ret=%d\n", __func__, group, event, ret); @@ -125,58 +88,17 @@ static int fanotify_get_response_from_access(struct fsnotify_group *group, } #endif -static int fanotify_handle_event(struct fsnotify_group *group, - struct fsnotify_mark *inode_mark, - struct fsnotify_mark *fanotify_mark, - struct fsnotify_event *event) -{ - int ret = 0; - struct fsnotify_event *notify_event = NULL; - - BUILD_BUG_ON(FAN_ACCESS != FS_ACCESS); - BUILD_BUG_ON(FAN_MODIFY != FS_MODIFY); - BUILD_BUG_ON(FAN_CLOSE_NOWRITE != FS_CLOSE_NOWRITE); - BUILD_BUG_ON(FAN_CLOSE_WRITE != FS_CLOSE_WRITE); - BUILD_BUG_ON(FAN_OPEN != FS_OPEN); - BUILD_BUG_ON(FAN_EVENT_ON_CHILD != FS_EVENT_ON_CHILD); - BUILD_BUG_ON(FAN_Q_OVERFLOW != FS_Q_OVERFLOW); - BUILD_BUG_ON(FAN_OPEN_PERM != FS_OPEN_PERM); - BUILD_BUG_ON(FAN_ACCESS_PERM != FS_ACCESS_PERM); - BUILD_BUG_ON(FAN_ONDIR != FS_ISDIR); - - pr_debug("%s: group=%p event=%p\n", __func__, group, event); - - notify_event = fsnotify_add_notify_event(group, event, NULL, fanotify_merge); - if (IS_ERR(notify_event)) - return PTR_ERR(notify_event); - -#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS - if (event->mask & FAN_ALL_PERM_EVENTS) { - /* if we merged we need to wait on the new event */ - if (notify_event) - event = notify_event; - ret = fanotify_get_response_from_access(group, event); - } -#endif - - if (notify_event) - fsnotify_put_event(notify_event); - - return ret; -} - -static bool fanotify_should_send_event(struct fsnotify_group *group, - struct inode *to_tell, - struct fsnotify_mark *inode_mark, +static bool fanotify_should_send_event(struct fsnotify_mark *inode_mark, struct fsnotify_mark *vfsmnt_mark, - __u32 event_mask, void *data, int data_type) + u32 event_mask, + void *data, int data_type) { __u32 marks_mask, marks_ignored_mask; struct path *path = data; - pr_debug("%s: group=%p to_tell=%p inode_mark=%p vfsmnt_mark=%p " - "mask=%x data=%p data_type=%d\n", __func__, group, to_tell, - inode_mark, vfsmnt_mark, event_mask, data, data_type); + pr_debug("%s: inode_mark=%p vfsmnt_mark=%p mask=%x data=%p" + " data_type=%d\n", __func__, inode_mark, vfsmnt_mark, + event_mask, data, data_type); /* if we don't have enough info to send an event to userspace say no */ if (data_type != FSNOTIFY_EVENT_PATH) @@ -217,6 +139,74 @@ static bool fanotify_should_send_event(struct fsnotify_group *group, return false; } +static int fanotify_handle_event(struct fsnotify_group *group, + struct inode *inode, + struct fsnotify_mark *inode_mark, + struct fsnotify_mark *fanotify_mark, + u32 mask, void *data, int data_type, + const unsigned char *file_name) +{ + int ret = 0; + struct fanotify_event_info *event; + struct fsnotify_event *fsn_event; + struct fsnotify_event *notify_fsn_event; + + BUILD_BUG_ON(FAN_ACCESS != FS_ACCESS); + BUILD_BUG_ON(FAN_MODIFY != FS_MODIFY); + BUILD_BUG_ON(FAN_CLOSE_NOWRITE != FS_CLOSE_NOWRITE); + BUILD_BUG_ON(FAN_CLOSE_WRITE != FS_CLOSE_WRITE); + BUILD_BUG_ON(FAN_OPEN != FS_OPEN); + BUILD_BUG_ON(FAN_EVENT_ON_CHILD != FS_EVENT_ON_CHILD); + BUILD_BUG_ON(FAN_Q_OVERFLOW != FS_Q_OVERFLOW); + BUILD_BUG_ON(FAN_OPEN_PERM != FS_OPEN_PERM); + BUILD_BUG_ON(FAN_ACCESS_PERM != FS_ACCESS_PERM); + BUILD_BUG_ON(FAN_ONDIR != FS_ISDIR); + + if (!fanotify_should_send_event(inode_mark, fanotify_mark, mask, data, + data_type)) + return 0; + + pr_debug("%s: group=%p inode=%p mask=%x\n", __func__, group, inode, + mask); + + event = kmem_cache_alloc(fanotify_event_cachep, GFP_KERNEL); + if (unlikely(!event)) + return -ENOMEM; + + fsn_event = &event->fse; + fsnotify_init_event(fsn_event, inode, mask); + event->tgid = get_pid(task_tgid(current)); + if (data_type == FSNOTIFY_EVENT_PATH) { + struct path *path = data; + event->path = *path; + path_get(&event->path); + } else { + event->path.mnt = NULL; + event->path.dentry = NULL; + } +#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS + event->response = 0; +#endif + + notify_fsn_event = fsnotify_add_notify_event(group, fsn_event, + fanotify_merge); + if (notify_fsn_event) { + /* Our event wasn't used in the end. Free it. */ + fsnotify_destroy_event(group, fsn_event); + if (IS_ERR(notify_fsn_event)) + return PTR_ERR(notify_fsn_event); + /* We need to ask about a different events after a merge... */ + event = FANOTIFY_E(notify_fsn_event); + fsn_event = notify_fsn_event; + } + +#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS + if (fsn_event->mask & FAN_ALL_PERM_EVENTS) + ret = fanotify_get_response_from_access(group, event); +#endif + return ret; +} + static void fanotify_free_group_priv(struct fsnotify_group *group) { struct user_struct *user; @@ -226,10 +216,18 @@ static void fanotify_free_group_priv(struct fsnotify_group *group) free_uid(user); } +static void fanotify_free_event(struct fsnotify_event *fsn_event) +{ + struct fanotify_event_info *event; + + event = FANOTIFY_E(fsn_event); + path_put(&event->path); + put_pid(event->tgid); + kmem_cache_free(fanotify_event_cachep, event); +} + const struct fsnotify_ops fanotify_fsnotify_ops = { .handle_event = fanotify_handle_event, - .should_send_event = fanotify_should_send_event, .free_group_priv = fanotify_free_group_priv, - .free_event_priv = NULL, - .freeing_mark = NULL, + .free_event = fanotify_free_event, }; diff --git a/fs/notify/fanotify/fanotify.h b/fs/notify/fanotify/fanotify.h new file mode 100644 index 0000000..0e90174 --- /dev/null +++ b/fs/notify/fanotify/fanotify.h @@ -0,0 +1,23 @@ +#include <linux/fsnotify_backend.h> +#include <linux/path.h> +#include <linux/slab.h> + +extern struct kmem_cache *fanotify_event_cachep; + +struct fanotify_event_info { + struct fsnotify_event fse; + /* + * We hold ref to this path so it may be dereferenced at any point + * during this object's lifetime + */ + struct path path; + struct pid *tgid; +#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS + u32 response; /* userspace answer to question */ +#endif +}; + +static inline struct fanotify_event_info *FANOTIFY_E(struct fsnotify_event *fse) +{ + return container_of(fse, struct fanotify_event_info, fse); +} diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c index e44cb64..57d7c08 100644 --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -19,6 +19,7 @@ #include "../../mount.h" #include "../fdinfo.h" +#include "fanotify.h" #define FANOTIFY_DEFAULT_MAX_EVENTS 16384 #define FANOTIFY_DEFAULT_MAX_MARKS 8192 @@ -28,11 +29,12 @@ extern const struct fsnotify_ops fanotify_fsnotify_ops; static struct kmem_cache *fanotify_mark_cache __read_mostly; static struct kmem_cache *fanotify_response_event_cache __read_mostly; +struct kmem_cache *fanotify_event_cachep __read_mostly; struct fanotify_response_event { struct list_head list; __s32 fd; - struct fsnotify_event *event; + struct fanotify_event_info *event; }; /* @@ -61,8 +63,8 @@ static struct fsnotify_event *get_one_event(struct fsnotify_group *group, } static int create_fd(struct fsnotify_group *group, - struct fsnotify_event *event, - struct file **file) + struct fanotify_event_info *event, + struct file **file) { int client_fd; struct file *new_file; @@ -73,12 +75,6 @@ static int create_fd(struct fsnotify_group *group, if (client_fd < 0) return client_fd; - if (event->data_type != FSNOTIFY_EVENT_PATH) { - WARN_ON(1); - put_unused_fd(client_fd); - return -EINVAL; - } - /* * we need a new file handle for the userspace program so it can read even if it was * originally opened O_WRONLY. @@ -109,23 +105,25 @@ static int create_fd(struct fsnotify_group *group, } static int fill_event_metadata(struct fsnotify_group *group, - struct fanotify_event_metadata *metadata, - struct fsnotify_event *event, - struct file **file) + struct fanotify_event_metadata *metadata, + struct fsnotify_event *fsn_event, + struct file **file) { int ret = 0; + struct fanotify_event_info *event; pr_debug("%s: group=%p metadata=%p event=%p\n", __func__, - group, metadata, event); + group, metadata, fsn_event); *file = NULL; + event = container_of(fsn_event, struct fanotify_event_info, fse); metadata->event_len = FAN_EVENT_METADATA_LEN; metadata->metadata_len = FAN_EVENT_METADATA_LEN; metadata->vers = FANOTIFY_METADATA_VERSION; metadata->reserved = 0; - metadata->mask = event->mask & FAN_ALL_OUTGOING_EVENTS; + metadata->mask = fsn_event->mask & FAN_ALL_OUTGOING_EVENTS; metadata->pid = pid_vnr(event->tgid); - if (unlikely(event->mask & FAN_Q_OVERFLOW)) + if (unlikely(fsn_event->mask & FAN_Q_OVERFLOW)) metadata->fd = FAN_NOFD; else { metadata->fd = create_fd(group, event, file); @@ -209,7 +207,7 @@ static int prepare_for_access_response(struct fsnotify_group *group, if (!re) return -ENOMEM; - re->event = event; + re->event = FANOTIFY_E(event); re->fd = fd; mutex_lock(&group->fanotify_data.access_mutex); @@ -217,7 +215,7 @@ static int prepare_for_access_response(struct fsnotify_group *group, if (atomic_read(&group->fanotify_data.bypass_perm)) { mutex_unlock(&group->fanotify_data.access_mutex); kmem_cache_free(fanotify_response_event_cache, re); - event->response = FAN_ALLOW; + FANOTIFY_E(event)->response = FAN_ALLOW; return 0; } @@ -273,7 +271,7 @@ out_close_fd: out: #ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS if (event->mask & FAN_ALL_PERM_EVENTS) { - event->response = FAN_DENY; + FANOTIFY_E(event)->response = FAN_DENY; wake_up(&group->fanotify_data.access_waitq); } #endif @@ -321,7 +319,7 @@ static ssize_t fanotify_read(struct file *file, char __user *buf, if (IS_ERR(kevent)) break; ret = copy_event_to_user(group, kevent, buf); - fsnotify_put_event(kevent); + fsnotify_destroy_event(group, kevent); if (ret < 0) break; buf += ret; @@ -409,7 +407,7 @@ static int fanotify_release(struct inode *ignored, struct file *file) static long fanotify_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { struct fsnotify_group *group; - struct fsnotify_event_holder *holder; + struct fsnotify_event *fsn_event; void __user *p; int ret = -ENOTTY; size_t send_len = 0; @@ -421,7 +419,7 @@ static long fanotify_ioctl(struct file *file, unsigned int cmd, unsigned long ar switch (cmd) { case FIONREAD: mutex_lock(&group->notification_mutex); - list_for_each_entry(holder, &group->notification_list, event_list) + list_for_each_entry(fsn_event, &group->notification_list, list) send_len += FAN_EVENT_METADATA_LEN; mutex_unlock(&group->notification_mutex); ret = put_user(send_len, (int __user *) p); @@ -906,6 +904,7 @@ static int __init fanotify_user_setup(void) fanotify_mark_cache = KMEM_CACHE(fsnotify_mark, SLAB_PANIC); fanotify_response_event_cache = KMEM_CACHE(fanotify_response_event, SLAB_PANIC); + fanotify_event_cachep = KMEM_CACHE(fanotify_event_info, SLAB_PANIC); return 0; } diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c index 4bb21d6..1d4e1ea 100644 --- a/fs/notify/fsnotify.c +++ b/fs/notify/fsnotify.c @@ -128,8 +128,7 @@ static int send_to_group(struct inode *to_tell, struct fsnotify_mark *vfsmount_mark, __u32 mask, void *data, int data_is, u32 cookie, - const unsigned char *file_name, - struct fsnotify_event **event) + const unsigned char *file_name) { struct fsnotify_group *group = NULL; __u32 inode_test_mask = 0; @@ -170,27 +169,17 @@ static int send_to_group(struct inode *to_tell, pr_debug("%s: group=%p to_tell=%p mask=%x inode_mark=%p" " inode_test_mask=%x vfsmount_mark=%p vfsmount_test_mask=%x" - " data=%p data_is=%d cookie=%d event=%p\n", + " data=%p data_is=%d cookie=%d\n", __func__, group, to_tell, mask, inode_mark, inode_test_mask, vfsmount_mark, vfsmount_test_mask, data, - data_is, cookie, *event); + data_is, cookie); if (!inode_test_mask && !vfsmount_test_mask) return 0; - if (group->ops->should_send_event(group, to_tell, inode_mark, - vfsmount_mark, mask, data, - data_is) == false) - return 0; - - if (!*event) { - *event = fsnotify_create_event(to_tell, mask, data, - data_is, file_name, - cookie, GFP_KERNEL); - if (!*event) - return -ENOMEM; - } - return group->ops->handle_event(group, inode_mark, vfsmount_mark, *event); + return group->ops->handle_event(group, to_tell, inode_mark, + vfsmount_mark, mask, data, data_is, + file_name); } /* @@ -205,7 +194,6 @@ int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is, struct hlist_node *inode_node = NULL, *vfsmount_node = NULL; struct fsnotify_mark *inode_mark = NULL, *vfsmount_mark = NULL; struct fsnotify_group *inode_group, *vfsmount_group; - struct fsnotify_event *event = NULL; struct mount *mnt; int idx, ret = 0; /* global tests shouldn't care about events on child only the specific event */ @@ -258,18 +246,18 @@ int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is, if (inode_group > vfsmount_group) { /* handle inode */ - ret = send_to_group(to_tell, inode_mark, NULL, mask, data, - data_is, cookie, file_name, &event); + ret = send_to_group(to_tell, inode_mark, NULL, mask, + data, data_is, cookie, file_name); /* we didn't use the vfsmount_mark */ vfsmount_group = NULL; } else if (vfsmount_group > inode_group) { - ret = send_to_group(to_tell, NULL, vfsmount_mark, mask, data, - data_is, cookie, file_name, &event); + ret = send_to_group(to_tell, NULL, vfsmount_mark, mask, + data, data_is, cookie, file_name); inode_group = NULL; } else { ret = send_to_group(to_tell, inode_mark, vfsmount_mark, - mask, data, data_is, cookie, file_name, - &event); + mask, data, data_is, cookie, + file_name); } if (ret && (mask & ALL_FSNOTIFY_PERM_EVENTS)) @@ -285,12 +273,6 @@ int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is, ret = 0; out: srcu_read_unlock(&fsnotify_mark_srcu, idx); - /* - * fsnotify_create_event() took a reference so the event can't be cleaned - * up while we are still trying to add it to lists, drop that one. - */ - if (event) - fsnotify_put_event(event); return ret; } diff --git a/fs/notify/group.c b/fs/notify/group.c index bd2625b..ee674fe 100644 --- a/fs/notify/group.c +++ b/fs/notify/group.c @@ -99,6 +99,7 @@ struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops) INIT_LIST_HEAD(&group->marks_list); group->ops = ops; + fsnotify_init_event(&group->overflow_event, NULL, FS_Q_OVERFLOW); return group; } diff --git a/fs/notify/inotify/inotify.h b/fs/notify/inotify/inotify.h index b6642e4..485eef3 100644 --- a/fs/notify/inotify/inotify.h +++ b/fs/notify/inotify/inotify.h @@ -2,11 +2,12 @@ #include <linux/inotify.h> #include <linux/slab.h> /* struct kmem_cache */ -extern struct kmem_cache *event_priv_cachep; - -struct inotify_event_private_data { - struct fsnotify_event_private_data fsnotify_event_priv_data; +struct inotify_event_info { + struct fsnotify_event fse; int wd; + u32 sync_cookie; + int name_len; + char name[]; }; struct inotify_inode_mark { @@ -14,8 +15,18 @@ struct inotify_inode_mark { int wd; }; +static inline struct inotify_event_info *INOTIFY_E(struct fsnotify_event *fse) +{ + return container_of(fse, struct inotify_event_info, fse); +} + extern void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark, struct fsnotify_group *group); -extern void inotify_free_event_priv(struct fsnotify_event_private_data *event_priv); +extern int inotify_handle_event(struct fsnotify_group *group, + struct inode *inode, + struct fsnotify_mark *inode_mark, + struct fsnotify_mark *vfsmount_mark, + u32 mask, void *data, int data_type, + const unsigned char *file_name); extern const struct fsnotify_ops inotify_fsnotify_ops; diff --git a/fs/notify/inotify/inotify_fsnotify.c b/fs/notify/inotify/inotify_fsnotify.c index 4216308..aad1a35 100644 --- a/fs/notify/inotify/inotify_fsnotify.c +++ b/fs/notify/inotify/inotify_fsnotify.c @@ -34,100 +34,87 @@ #include "inotify.h" /* - * Check if 2 events contain the same information. We do not compare private data - * but at this moment that isn't a problem for any know fsnotify listeners. + * Check if 2 events contain the same information. */ -static bool event_compare(struct fsnotify_event *old, struct fsnotify_event *new) +static bool event_compare(struct fsnotify_event *old_fsn, + struct fsnotify_event *new_fsn) { - if ((old->mask == new->mask) && - (old->to_tell == new->to_tell) && - (old->data_type == new->data_type) && - (old->name_len == new->name_len)) { - switch (old->data_type) { - case (FSNOTIFY_EVENT_INODE): - /* remember, after old was put on the wait_q we aren't - * allowed to look at the inode any more, only thing - * left to check was if the file_name is the same */ - if (!old->name_len || - !strcmp(old->file_name, new->file_name)) - return true; - break; - case (FSNOTIFY_EVENT_PATH): - if ((old->path.mnt == new->path.mnt) && - (old->path.dentry == new->path.dentry)) - return true; - break; - case (FSNOTIFY_EVENT_NONE): - if (old->mask & FS_Q_OVERFLOW) - return true; - else if (old->mask & FS_IN_IGNORED) - return false; - return true; - }; - } + struct inotify_event_info *old, *new; + + if (old_fsn->mask & FS_IN_IGNORED) + return false; + old = INOTIFY_E(old_fsn); + new = INOTIFY_E(new_fsn); + if ((old_fsn->mask == new_fsn->mask) && + (old_fsn->inode == new_fsn->inode) && + (old->name_len == new->name_len) && + (!old->name_len || !strcmp(old->name, new->name))) + return true; return false; } static struct fsnotify_event *inotify_merge(struct list_head *list, struct fsnotify_event *event) { - struct fsnotify_event_holder *last_holder; struct fsnotify_event *last_event; - /* and the list better be locked by something too */ - spin_lock(&event->lock); - - last_holder = list_entry(list->prev, struct fsnotify_event_holder, event_list); - last_event = last_holder->event; - if (event_compare(last_event, event)) - fsnotify_get_event(last_event); - else - last_event = NULL; - - spin_unlock(&event->lock); - + last_event = list_entry(list->prev, struct fsnotify_event, list); + if (!event_compare(last_event, event)) + return NULL; return last_event; } -static int inotify_handle_event(struct fsnotify_group *group, - struct fsnotify_mark *inode_mark, - struct fsnotify_mark *vfsmount_mark, - struct fsnotify_event *event) +int inotify_handle_event(struct fsnotify_group *group, + struct inode *inode, + struct fsnotify_mark *inode_mark, + struct fsnotify_mark *vfsmount_mark, + u32 mask, void *data, int data_type, + const unsigned char *file_name) { struct inotify_inode_mark *i_mark; - struct inode *to_tell; - struct inotify_event_private_data *event_priv; - struct fsnotify_event_private_data *fsn_event_priv; + struct inotify_event_info *event; struct fsnotify_event *added_event; - int wd, ret = 0; + struct fsnotify_event *fsn_event; + int ret = 0; + int len = 0; + int alloc_len = sizeof(struct inotify_event_info); BUG_ON(vfsmount_mark); - pr_debug("%s: group=%p event=%p to_tell=%p mask=%x\n", __func__, group, - event, event->to_tell, event->mask); + if ((inode_mark->mask & FS_EXCL_UNLINK) && + (data_type == FSNOTIFY_EVENT_PATH)) { + struct path *path = data; - to_tell = event->to_tell; + if (d_unlinked(path->dentry)) + return 0; + } + if (file_name) { + len = strlen(file_name); + alloc_len += len + 1; + } + + pr_debug("%s: group=%p inode=%p mask=%x\n", __func__, group, inode, + mask); i_mark = container_of(inode_mark, struct inotify_inode_mark, fsn_mark); - wd = i_mark->wd; - event_priv = kmem_cache_alloc(event_priv_cachep, GFP_KERNEL); - if (unlikely(!event_priv)) + event = kmalloc(alloc_len, GFP_KERNEL); + if (unlikely(!event)) return -ENOMEM; - fsn_event_priv = &event_priv->fsnotify_event_priv_data; - - fsnotify_get_group(group); - fsn_event_priv->group = group; - event_priv->wd = wd; + fsn_event = &event->fse; + fsnotify_init_event(fsn_event, inode, mask); + event->wd = i_mark->wd; + event->name_len = len; + if (len) + strcpy(event->name, file_name); - added_event = fsnotify_add_notify_event(group, event, fsn_event_priv, inotify_merge); + added_event = fsnotify_add_notify_event(group, fsn_event, inotify_merge); if (added_event) { - inotify_free_event_priv(fsn_event_priv); - if (!IS_ERR(added_event)) - fsnotify_put_event(added_event); - else + /* Our event wasn't used in the end. Free it. */ + fsnotify_destroy_event(group, fsn_event); + if (IS_ERR(added_event)) ret = PTR_ERR(added_event); } @@ -142,22 +129,6 @@ static void inotify_freeing_mark(struct fsnotify_mark *fsn_mark, struct fsnotify inotify_ignored_and_remove_idr(fsn_mark, group); } -static bool inotify_should_send_event(struct fsnotify_group *group, struct inode *inode, - struct fsnotify_mark *inode_mark, - struct fsnotify_mark *vfsmount_mark, - __u32 mask, void *data, int data_type) -{ - if ((inode_mark->mask & FS_EXCL_UNLINK) && - (data_type == FSNOTIFY_EVENT_PATH)) { - struct path *path = data; - - if (d_unlinked(path->dentry)) - return false; - } - - return true; -} - /* * This is NEVER supposed to be called. Inotify marks should either have been * removed from the idr when the watch was removed or in the @@ -202,22 +173,14 @@ static void inotify_free_group_priv(struct fsnotify_group *group) free_uid(group->inotify_data.user); } -void inotify_free_event_priv(struct fsnotify_event_private_data *fsn_event_priv) +static void inotify_free_event(struct fsnotify_event *fsn_event) { - struct inotify_event_private_data *event_priv; - - - event_priv = container_of(fsn_event_priv, struct inotify_event_private_data, - fsnotify_event_priv_data); - - fsnotify_put_group(fsn_event_priv->group); - kmem_cache_free(event_priv_cachep, event_priv); + kfree(INOTIFY_E(fsn_event)); } const struct fsnotify_ops inotify_fsnotify_ops = { .handle_event = inotify_handle_event, - .should_send_event = inotify_should_send_event, .free_group_priv = inotify_free_group_priv, - .free_event_priv = inotify_free_event_priv, + .free_event = inotify_free_event, .freeing_mark = inotify_freeing_mark, }; diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c index 60f954a..497395c 100644 --- a/fs/notify/inotify/inotify_user.c +++ b/fs/notify/inotify/inotify_user.c @@ -50,7 +50,6 @@ static int inotify_max_queued_events __read_mostly; static int inotify_max_user_watches __read_mostly; static struct kmem_cache *inotify_inode_mark_cachep __read_mostly; -struct kmem_cache *event_priv_cachep __read_mostly; #ifdef CONFIG_SYSCTL @@ -124,6 +123,16 @@ static unsigned int inotify_poll(struct file *file, poll_table *wait) return ret; } +static int round_event_name_len(struct fsnotify_event *fsn_event) +{ + struct inotify_event_info *event; + + event = INOTIFY_E(fsn_event); + if (!event->name_len) + return 0; + return roundup(event->name_len + 1, sizeof(struct inotify_event)); +} + /* * Get an inotify_kernel_event if one exists and is small * enough to fit in "count". Return an error pointer if @@ -144,9 +153,7 @@ static struct fsnotify_event *get_one_event(struct fsnotify_group *group, pr_debug("%s: group=%p event=%p\n", __func__, group, event); - if (event->name_len) - event_size += roundup(event->name_len + 1, event_size); - + event_size += round_event_name_len(event); if (event_size > count) return ERR_PTR(-EINVAL); @@ -164,40 +171,27 @@ static struct fsnotify_event *get_one_event(struct fsnotify_group *group, * buffer we had in "get_one_event()" above. */ static ssize_t copy_event_to_user(struct fsnotify_group *group, - struct fsnotify_event *event, + struct fsnotify_event *fsn_event, char __user *buf) { struct inotify_event inotify_event; - struct fsnotify_event_private_data *fsn_priv; - struct inotify_event_private_data *priv; + struct inotify_event_info *event; size_t event_size = sizeof(struct inotify_event); - size_t name_len = 0; - - pr_debug("%s: group=%p event=%p\n", __func__, group, event); + size_t name_len; + size_t pad_name_len; - /* we get the inotify watch descriptor from the event private data */ - spin_lock(&event->lock); - fsn_priv = fsnotify_remove_priv_from_event(group, event); - spin_unlock(&event->lock); - - if (!fsn_priv) - inotify_event.wd = -1; - else { - priv = container_of(fsn_priv, struct inotify_event_private_data, - fsnotify_event_priv_data); - inotify_event.wd = priv->wd; - inotify_free_event_priv(fsn_priv); - } + pr_debug("%s: group=%p event=%p\n", __func__, group, fsn_event); + event = INOTIFY_E(fsn_event); + name_len = event->name_len; /* - * round up event->name_len so it is a multiple of event_size + * round up name length so it is a multiple of event_size * plus an extra byte for the terminating '\0'. */ - if (event->name_len) - name_len = roundup(event->name_len + 1, event_size); - inotify_event.len = name_len; - - inotify_event.mask = inotify_mask_to_arg(event->mask); + pad_name_len = round_event_name_len(fsn_event); + inotify_event.len = pad_name_len; + inotify_event.mask = inotify_mask_to_arg(fsn_event->mask); + inotify_event.wd = event->wd; inotify_event.cookie = event->sync_cookie; /* send the main event */ @@ -209,20 +203,18 @@ static ssize_t copy_event_to_user(struct fsnotify_group *group, /* * fsnotify only stores the pathname, so here we have to send the pathname * and then pad that pathname out to a multiple of sizeof(inotify_event) - * with zeros. I get my zeros from the nul_inotify_event. + * with zeros. */ - if (name_len) { - unsigned int len_to_zero = name_len - event->name_len; + if (pad_name_len) { /* copy the path name */ - if (copy_to_user(buf, event->file_name, event->name_len)) + if (copy_to_user(buf, event->name, name_len)) return -EFAULT; - buf += event->name_len; + buf += name_len; /* fill userspace with 0's */ - if (clear_user(buf, len_to_zero)) + if (clear_user(buf, pad_name_len - name_len)) return -EFAULT; - buf += len_to_zero; - event_size += name_len; + event_size += pad_name_len; } return event_size; @@ -254,7 +246,7 @@ static ssize_t inotify_read(struct file *file, char __user *buf, if (IS_ERR(kevent)) break; ret = copy_event_to_user(group, kevent, buf); - fsnotify_put_event(kevent); + fsnotify_destroy_event(group, kevent); if (ret < 0) break; buf += ret; @@ -297,8 +289,7 @@ static long inotify_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { struct fsnotify_group *group; - struct fsnotify_event_holder *holder; - struct fsnotify_event *event; + struct fsnotify_event *fsn_event; void __user *p; int ret = -ENOTTY; size_t send_len = 0; @@ -311,12 +302,10 @@ static long inotify_ioctl(struct file *file, unsigned int cmd, switch (cmd) { case FIONREAD: mutex_lock(&group->notification_mutex); - list_for_each_entry(holder, &group->notification_list, event_list) { - event = holder->event; + list_for_each_entry(fsn_event, &group->notification_list, + list) { send_len += sizeof(struct inotify_event); - if (event->name_len) - send_len += roundup(event->name_len + 1, - sizeof(struct inotify_event)); + send_len += round_event_name_len(fsn_event); } mutex_unlock(&group->notification_mutex); ret = put_user(send_len, (int __user *) p); @@ -503,43 +492,12 @@ void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark, struct fsnotify_group *group) { struct inotify_inode_mark *i_mark; - struct fsnotify_event *ignored_event, *notify_event; - struct inotify_event_private_data *event_priv; - struct fsnotify_event_private_data *fsn_event_priv; - int ret; - - i_mark = container_of(fsn_mark, struct inotify_inode_mark, fsn_mark); - - ignored_event = fsnotify_create_event(NULL, FS_IN_IGNORED, NULL, - FSNOTIFY_EVENT_NONE, NULL, 0, - GFP_NOFS); - if (!ignored_event) - goto skip_send_ignore; - - event_priv = kmem_cache_alloc(event_priv_cachep, GFP_NOFS); - if (unlikely(!event_priv)) - goto skip_send_ignore; - - fsn_event_priv = &event_priv->fsnotify_event_priv_data; - - fsnotify_get_group(group); - fsn_event_priv->group = group; - event_priv->wd = i_mark->wd; - - notify_event = fsnotify_add_notify_event(group, ignored_event, fsn_event_priv, NULL); - if (notify_event) { - if (IS_ERR(notify_event)) - ret = PTR_ERR(notify_event); - else - fsnotify_put_event(notify_event); - inotify_free_event_priv(fsn_event_priv); - } -skip_send_ignore: - /* matches the reference taken when the event was created */ - if (ignored_event) - fsnotify_put_event(ignored_event); + /* Queue ignore event for the watch */ + inotify_handle_event(group, NULL, fsn_mark, NULL, FS_IN_IGNORED, + NULL, FSNOTIFY_EVENT_NONE, NULL); + i_mark = container_of(fsn_mark, struct inotify_inode_mark, fsn_mark); /* remove this mark from the idr */ inotify_remove_from_idr(group, i_mark); @@ -836,7 +794,6 @@ static int __init inotify_user_setup(void) BUG_ON(hweight32(ALL_INOTIFY_BITS) != 21); inotify_inode_mark_cachep = KMEM_CACHE(inotify_inode_mark, SLAB_PANIC); - event_priv_cachep = KMEM_CACHE(inotify_event_private_data, SLAB_PANIC); inotify_max_queued_events = 16384; inotify_max_user_instances = 128; diff --git a/fs/notify/notification.c b/fs/notify/notification.c index 7b51b05..952237b 100644 --- a/fs/notify/notification.c +++ b/fs/notify/notification.c @@ -48,15 +48,6 @@ #include <linux/fsnotify_backend.h> #include "fsnotify.h" -static struct kmem_cache *fsnotify_event_cachep; -static struct kmem_cache *fsnotify_event_holder_cachep; -/* - * This is a magic event we send when the q is too full. Since it doesn't - * hold real event information we just keep one system wide and use it any time - * it is needed. It's refcnt is set 1 at kernel init time and will never - * get set to 0 so it will never get 'freed' - */ -static struct fsnotify_event *q_overflow_event; static atomic_t fsnotify_sync_cookie = ATOMIC_INIT(0); /** @@ -76,60 +67,14 @@ bool fsnotify_notify_queue_is_empty(struct fsnotify_group *group) return list_empty(&group->notification_list) ? true : false; } -void fsnotify_get_event(struct fsnotify_event *event) +void fsnotify_destroy_event(struct fsnotify_group *group, + struct fsnotify_event *event) { - atomic_inc(&event->refcnt); -} - -void fsnotify_put_event(struct fsnotify_event *event) -{ - if (!event) + /* Overflow events are per-group and we don't want to free them */ + if (!event || event->mask == FS_Q_OVERFLOW) return; - if (atomic_dec_and_test(&event->refcnt)) { - pr_debug("%s: event=%p\n", __func__, event); - - if (event->data_type == FSNOTIFY_EVENT_PATH) - path_put(&event->path); - - BUG_ON(!list_empty(&event->private_data_list)); - - kfree(event->file_name); - put_pid(event->tgid); - kmem_cache_free(fsnotify_event_cachep, event); - } -} - -struct fsnotify_event_holder *fsnotify_alloc_event_holder(void) -{ - return kmem_cache_alloc(fsnotify_event_holder_cachep, GFP_KERNEL); -} - -void fsnotify_destroy_event_holder(struct fsnotify_event_holder *holder) -{ - if (holder) - kmem_cache_free(fsnotify_event_holder_cachep, holder); -} - -/* - * Find the private data that the group previously attached to this event when - * the group added the event to the notification queue (fsnotify_add_notify_event) - */ -struct fsnotify_event_private_data *fsnotify_remove_priv_from_event(struct fsnotify_group *group, struct fsnotify_event *event) -{ - struct fsnotify_event_private_data *lpriv; - struct fsnotify_event_private_data *priv = NULL; - - assert_spin_locked(&event->lock); - - list_for_each_entry(lpriv, &event->private_data_list, event_list) { - if (lpriv->group == group) { - priv = lpriv; - list_del(&priv->event_list); - break; - } - } - return priv; + group->ops->free_event(event); } /* @@ -137,91 +82,35 @@ struct fsnotify_event_private_data *fsnotify_remove_priv_from_event(struct fsnot * event off the queue to deal with. If the event is successfully added to the * group's notification queue, a reference is taken on event. */ -struct fsnotify_event *fsnotify_add_notify_event(struct fsnotify_group *group, struct fsnotify_event *event, - struct fsnotify_event_private_data *priv, +struct fsnotify_event *fsnotify_add_notify_event(struct fsnotify_group *group, + struct fsnotify_event *event, struct fsnotify_event *(*merge)(struct list_head *, struct fsnotify_event *)) { struct fsnotify_event *return_event = NULL; - struct fsnotify_event_holder *holder = NULL; struct list_head *list = &group->notification_list; - pr_debug("%s: group=%p event=%p priv=%p\n", __func__, group, event, priv); - - /* - * There is one fsnotify_event_holder embedded inside each fsnotify_event. - * Check if we expect to be able to use that holder. If not alloc a new - * holder. - * For the overflow event it's possible that something will use the in - * event holder before we get the lock so we may need to jump back and - * alloc a new holder, this can't happen for most events... - */ - if (!list_empty(&event->holder.event_list)) { -alloc_holder: - holder = fsnotify_alloc_event_holder(); - if (!holder) - return ERR_PTR(-ENOMEM); - } + pr_debug("%s: group=%p event=%p\n", __func__, group, event); mutex_lock(&group->notification_mutex); if (group->q_len >= group->max_events) { - event = q_overflow_event; - - /* - * we need to return the overflow event - * which means we need a ref - */ - fsnotify_get_event(event); + /* Queue overflow event only if it isn't already queued */ + if (list_empty(&group->overflow_event.list)) + event = &group->overflow_event; return_event = event; - - /* sorry, no private data on the overflow event */ - priv = NULL; } if (!list_empty(list) && merge) { - struct fsnotify_event *tmp; - - tmp = merge(list, event); - if (tmp) { - mutex_unlock(&group->notification_mutex); - - if (return_event) - fsnotify_put_event(return_event); - if (holder != &event->holder) - fsnotify_destroy_event_holder(holder); - return tmp; - } - } - - spin_lock(&event->lock); - - if (list_empty(&event->holder.event_list)) { - if (unlikely(holder)) - fsnotify_destroy_event_holder(holder); - holder = &event->holder; - } else if (unlikely(!holder)) { - /* between the time we checked above and got the lock the in - * event holder was used, go back and get a new one */ - spin_unlock(&event->lock); - mutex_unlock(&group->notification_mutex); - + return_event = merge(list, event); if (return_event) { - fsnotify_put_event(return_event); - return_event = NULL; + mutex_unlock(&group->notification_mutex); + return return_event; } - - goto alloc_holder; } group->q_len++; - holder->event = event; - - fsnotify_get_event(event); - list_add_tail(&holder->event_list, list); - if (priv) - list_add_tail(&priv->event_list, &event->private_data_list); - spin_unlock(&event->lock); + list_add_tail(&event->list, list); mutex_unlock(&group->notification_mutex); wake_up(&group->notification_waitq); @@ -230,32 +119,20 @@ alloc_holder: } /* - * Remove and return the first event from the notification list. There is a - * reference held on this event since it was on the list. It is the responsibility - * of the caller to drop this reference. + * Remove and return the first event from the notification list. It is the + * responsibility of the caller to destroy the obtained event */ struct fsnotify_event *fsnotify_remove_notify_event(struct fsnotify_group *group) { struct fsnotify_event *event; - struct fsnotify_event_holder *holder; BUG_ON(!mutex_is_locked(&group->notification_mutex)); pr_debug("%s: group=%p\n", __func__, group); - holder = list_first_entry(&group->notification_list, struct fsnotify_event_holder, event_list); - - event = holder->event; - - spin_lock(&event->lock); - holder->event = NULL; - list_del_init(&holder->event_list); - spin_unlock(&event->lock); - - /* event == holder means we are referenced through the in event holder */ - if (holder != &event->holder) - fsnotify_destroy_event_holder(holder); - + event = list_first_entry(&group->notification_list, + struct fsnotify_event, list); + list_del(&event->list); group->q_len--; return event; @@ -266,15 +143,10 @@ struct fsnotify_event *fsnotify_remove_notify_event(struct fsnotify_group *group */ struct fsnotify_event *fsnotify_peek_notify_event(struct fsnotify_group *group) { - struct fsnotify_event *event; - struct fsnotify_event_holder *holder; - BUG_ON(!mutex_is_locked(&group->notification_mutex)); - holder = list_first_entry(&group->notification_list, struct fsnotify_event_holder, event_list); - event = holder->event; - - return event; + return list_first_entry(&group->notification_list, + struct fsnotify_event, list); } /* @@ -284,181 +156,31 @@ struct fsnotify_event *fsnotify_peek_notify_event(struct fsnotify_group *group) void fsnotify_flush_notify(struct fsnotify_group *group) { struct fsnotify_event *event; - struct fsnotify_event_private_data *priv; mutex_lock(&group->notification_mutex); while (!fsnotify_notify_queue_is_empty(group)) { event = fsnotify_remove_notify_event(group); - /* if they don't implement free_event_priv they better not have attached any */ - if (group->ops->free_event_priv) { - spin_lock(&event->lock); - priv = fsnotify_remove_priv_from_event(group, event); - spin_unlock(&event->lock); - if (priv) - group->ops->free_event_priv(priv); - } - fsnotify_put_event(event); /* matches fsnotify_add_notify_event */ + fsnotify_destroy_event(group, event); } mutex_unlock(&group->notification_mutex); } -static void initialize_event(struct fsnotify_event *event) -{ - INIT_LIST_HEAD(&event->holder.event_list); - atomic_set(&event->refcnt, 1); - - spin_lock_init(&event->lock); - - INIT_LIST_HEAD(&event->private_data_list); -} - -/* - * Caller damn well better be holding whatever mutex is protecting the - * old_holder->event_list and the new_event must be a clean event which - * cannot be found anywhere else in the kernel. - */ -int fsnotify_replace_event(struct fsnotify_event_holder *old_holder, - struct fsnotify_event *new_event) -{ - struct fsnotify_event *old_event = old_holder->event; - struct fsnotify_event_holder *new_holder = &new_event->holder; - - enum event_spinlock_class { - SPINLOCK_OLD, - SPINLOCK_NEW, - }; - - pr_debug("%s: old_event=%p new_event=%p\n", __func__, old_event, new_event); - - /* - * if the new_event's embedded holder is in use someone - * screwed up and didn't give us a clean new event. - */ - BUG_ON(!list_empty(&new_holder->event_list)); - - spin_lock_nested(&old_event->lock, SPINLOCK_OLD); - spin_lock_nested(&new_event->lock, SPINLOCK_NEW); - - new_holder->event = new_event; - list_replace_init(&old_holder->event_list, &new_holder->event_list); - - spin_unlock(&new_event->lock); - spin_unlock(&old_event->lock); - - /* event == holder means we are referenced through the in event holder */ - if (old_holder != &old_event->holder) - fsnotify_destroy_event_holder(old_holder); - - fsnotify_get_event(new_event); /* on the list take reference */ - fsnotify_put_event(old_event); /* off the list, drop reference */ - - return 0; -} - -struct fsnotify_event *fsnotify_clone_event(struct fsnotify_event *old_event) -{ - struct fsnotify_event *event; - - event = kmem_cache_alloc(fsnotify_event_cachep, GFP_KERNEL); - if (!event) - return NULL; - - pr_debug("%s: old_event=%p new_event=%p\n", __func__, old_event, event); - - memcpy(event, old_event, sizeof(*event)); - initialize_event(event); - - if (event->name_len) { - event->file_name = kstrdup(old_event->file_name, GFP_KERNEL); - if (!event->file_name) { - kmem_cache_free(fsnotify_event_cachep, event); - return NULL; - } - } - event->tgid = get_pid(old_event->tgid); - if (event->data_type == FSNOTIFY_EVENT_PATH) - path_get(&event->path); - - return event; -} - /* * fsnotify_create_event - Allocate a new event which will be sent to each * group's handle_event function if the group was interested in this * particular event. * - * @to_tell the inode which is supposed to receive the event (sometimes a + * @inode the inode which is supposed to receive the event (sometimes a * parent of the inode to which the event happened. * @mask what actually happened. * @data pointer to the object which was actually affected * @data_type flag indication if the data is a file, path, inode, nothing... * @name the filename, if available */ -struct fsnotify_event *fsnotify_create_event(struct inode *to_tell, __u32 mask, void *data, - int data_type, const unsigned char *name, - u32 cookie, gfp_t gfp) +void fsnotify_init_event(struct fsnotify_event *event, struct inode *inode, + u32 mask) { - struct fsnotify_event *event; - - event = kmem_cache_zalloc(fsnotify_event_cachep, gfp); - if (!event) - return NULL; - - pr_debug("%s: event=%p to_tell=%p mask=%x data=%p data_type=%d\n", - __func__, event, to_tell, mask, data, data_type); - - initialize_event(event); - - if (name) { - event->file_name = kstrdup(name, gfp); - if (!event->file_name) { - kmem_cache_free(fsnotify_event_cachep, event); - return NULL; - } - event->name_len = strlen(event->file_name); - } - - event->tgid = get_pid(task_tgid(current)); - event->sync_cookie = cookie; - event->to_tell = to_tell; - event->data_type = data_type; - - switch (data_type) { - case FSNOTIFY_EVENT_PATH: { - struct path *path = data; - event->path.dentry = path->dentry; - event->path.mnt = path->mnt; - path_get(&event->path); - break; - } - case FSNOTIFY_EVENT_INODE: - event->inode = data; - break; - case FSNOTIFY_EVENT_NONE: - event->inode = NULL; - event->path.dentry = NULL; - event->path.mnt = NULL; - break; - default: - BUG(); - } - + INIT_LIST_HEAD(&event->list); + event->inode = inode; event->mask = mask; - - return event; -} - -static __init int fsnotify_notification_init(void) -{ - fsnotify_event_cachep = KMEM_CACHE(fsnotify_event, SLAB_PANIC); - fsnotify_event_holder_cachep = KMEM_CACHE(fsnotify_event_holder, SLAB_PANIC); - - q_overflow_event = fsnotify_create_event(NULL, FS_Q_OVERFLOW, NULL, - FSNOTIFY_EVENT_NONE, NULL, 0, - GFP_KERNEL); - if (!q_overflow_event) - panic("unable to allocate fsnotify q_overflow_event\n"); - - return 0; } -subsys_initcall(fsnotify_notification_init); diff --git a/fs/ocfs2/Makefile b/fs/ocfs2/Makefile index f17e58b..ce210d4 100644 --- a/fs/ocfs2/Makefile +++ b/fs/ocfs2/Makefile @@ -38,7 +38,6 @@ ocfs2-objs := \ symlink.o \ sysfile.o \ uptodate.o \ - ver.o \ quota_local.o \ quota_global.o \ xattr.o \ diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c index dc7411f..8750ae1 100644 --- a/fs/ocfs2/alloc.c +++ b/fs/ocfs2/alloc.c @@ -7260,14 +7260,8 @@ int ocfs2_trim_fs(struct super_block *sb, struct fstrim_range *range) start = range->start >> osb->s_clustersize_bits; len = range->len >> osb->s_clustersize_bits; minlen = range->minlen >> osb->s_clustersize_bits; - trimmed = 0; - - if (!len) { - range->len = 0; - return 0; - } - if (minlen >= osb->bitmap_cpg) + if (minlen >= osb->bitmap_cpg || range->len < sb->s_blocksize) return -EINVAL; main_bm_inode = ocfs2_get_system_file_inode(osb, @@ -7293,6 +7287,7 @@ int ocfs2_trim_fs(struct super_block *sb, struct fstrim_range *range) goto out_unlock; } + len = range->len >> osb->s_clustersize_bits; if (start + len > le32_to_cpu(main_bm->i_clusters)) len = le32_to_cpu(main_bm->i_clusters) - start; @@ -7307,6 +7302,7 @@ int ocfs2_trim_fs(struct super_block *sb, struct fstrim_range *range) last_group = ocfs2_which_cluster_group(main_bm_inode, start + len - 1); last_bit = osb->bitmap_cpg; + trimmed = 0; for (group = first_group; group <= last_group;) { if (first_bit + len >= osb->bitmap_cpg) last_bit = osb->bitmap_cpg; diff --git a/fs/ocfs2/cluster/Makefile b/fs/ocfs2/cluster/Makefile index bc8c5e7..1aefc03 100644 --- a/fs/ocfs2/cluster/Makefile +++ b/fs/ocfs2/cluster/Makefile @@ -1,4 +1,4 @@ obj-$(CONFIG_OCFS2_FS) += ocfs2_nodemanager.o ocfs2_nodemanager-objs := heartbeat.o masklog.o sys.o nodemanager.o \ - quorum.o tcp.o netdebug.o ver.o + quorum.o tcp.o netdebug.o diff --git a/fs/ocfs2/cluster/nodemanager.c b/fs/ocfs2/cluster/nodemanager.c index bb24064..441c84e 100644 --- a/fs/ocfs2/cluster/nodemanager.c +++ b/fs/ocfs2/cluster/nodemanager.c @@ -29,7 +29,6 @@ #include "heartbeat.h" #include "masklog.h" #include "sys.h" -#include "ver.h" /* for now we operate under the assertion that there can be only one * cluster active at a time. Changing this will require trickling @@ -945,8 +944,6 @@ static int __init init_o2nm(void) { int ret = -1; - cluster_print_version(); - ret = o2hb_init(); if (ret) goto out; @@ -984,6 +981,7 @@ out: MODULE_AUTHOR("Oracle"); MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("OCFS2 cluster management"); module_init(init_o2nm) module_exit(exit_o2nm) diff --git a/fs/ocfs2/cluster/ver.c b/fs/ocfs2/cluster/ver.c deleted file mode 100644 index a56eee6..0000000 --- a/fs/ocfs2/cluster/ver.c +++ /dev/null @@ -1,42 +0,0 @@ -/* -*- mode: c; c-basic-offset: 8; -*- - * vim: noexpandtab sw=8 ts=8 sts=0: - * - * ver.c - * - * version string - * - * Copyright (C) 2002, 2005 Oracle. All rights reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public - * License along with this program; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 021110-1307, USA. - */ - -#include <linux/module.h> -#include <linux/kernel.h> - -#include "ver.h" - -#define CLUSTER_BUILD_VERSION "1.5.0" - -#define VERSION_STR "OCFS2 Node Manager " CLUSTER_BUILD_VERSION - -void cluster_print_version(void) -{ - printk(KERN_INFO "%s\n", VERSION_STR); -} - -MODULE_DESCRIPTION(VERSION_STR); - -MODULE_VERSION(CLUSTER_BUILD_VERSION); diff --git a/fs/ocfs2/cluster/ver.h b/fs/ocfs2/cluster/ver.h deleted file mode 100644 index 32554c3..0000000 --- a/fs/ocfs2/cluster/ver.h +++ /dev/null @@ -1,31 +0,0 @@ -/* -*- mode: c; c-basic-offset: 8; -*- - * vim: noexpandtab sw=8 ts=8 sts=0: - * - * ver.h - * - * Function prototypes - * - * Copyright (C) 2005 Oracle. All rights reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public - * License along with this program; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 021110-1307, USA. - */ - -#ifndef O2CLUSTER_VER_H -#define O2CLUSTER_VER_H - -void cluster_print_version(void); - -#endif /* O2CLUSTER_VER_H */ diff --git a/fs/ocfs2/dlm/Makefile b/fs/ocfs2/dlm/Makefile index c8a044e..bd1aab1f 100644 --- a/fs/ocfs2/dlm/Makefile +++ b/fs/ocfs2/dlm/Makefile @@ -3,5 +3,5 @@ ccflags-y := -Ifs/ocfs2 obj-$(CONFIG_OCFS2_FS_O2CB) += ocfs2_dlm.o ocfs2_dlm-objs := dlmdomain.o dlmdebug.o dlmthread.o dlmrecovery.o \ - dlmmaster.o dlmast.o dlmconvert.o dlmlock.o dlmunlock.o dlmver.o + dlmmaster.o dlmast.o dlmconvert.o dlmlock.o dlmunlock.o diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c index 8b3382a..33660a4 100644 --- a/fs/ocfs2/dlm/dlmdomain.c +++ b/fs/ocfs2/dlm/dlmdomain.c @@ -43,8 +43,6 @@ #include "dlmdomain.h" #include "dlmdebug.h" -#include "dlmver.h" - #define MLOG_MASK_PREFIX (ML_DLM|ML_DLM_DOMAIN) #include "cluster/masklog.h" @@ -2328,8 +2326,6 @@ static int __init dlm_init(void) { int status; - dlm_print_version(); - status = dlm_init_mle_cache(); if (status) { mlog(ML_ERROR, "Could not create o2dlm_mle slabcache\n"); @@ -2379,6 +2375,7 @@ static void __exit dlm_exit (void) MODULE_AUTHOR("Oracle"); MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("OCFS2 Distributed Lock Management"); module_init(dlm_init); module_exit(dlm_exit); diff --git a/fs/ocfs2/dlm/dlmver.c b/fs/ocfs2/dlm/dlmver.c deleted file mode 100644 index dfc0da4..0000000 --- a/fs/ocfs2/dlm/dlmver.c +++ /dev/null @@ -1,42 +0,0 @@ -/* -*- mode: c; c-basic-offset: 8; -*- - * vim: noexpandtab sw=8 ts=8 sts=0: - * - * dlmver.c - * - * version string - * - * Copyright (C) 2002, 2005 Oracle. All rights reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public - * License along with this program; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 021110-1307, USA. - */ - -#include <linux/module.h> -#include <linux/kernel.h> - -#include "dlmver.h" - -#define DLM_BUILD_VERSION "1.5.0" - -#define VERSION_STR "OCFS2 DLM " DLM_BUILD_VERSION - -void dlm_print_version(void) -{ - printk(KERN_INFO "%s\n", VERSION_STR); -} - -MODULE_DESCRIPTION(VERSION_STR); - -MODULE_VERSION(DLM_BUILD_VERSION); diff --git a/fs/ocfs2/dlm/dlmver.h b/fs/ocfs2/dlm/dlmver.h deleted file mode 100644 index f674aee..0000000 --- a/fs/ocfs2/dlm/dlmver.h +++ /dev/null @@ -1,31 +0,0 @@ -/* -*- mode: c; c-basic-offset: 8; -*- - * vim: noexpandtab sw=8 ts=8 sts=0: - * - * dlmfsver.h - * - * Function prototypes - * - * Copyright (C) 2005 Oracle. All rights reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public - * License along with this program; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 021110-1307, USA. - */ - -#ifndef DLM_VER_H -#define DLM_VER_H - -void dlm_print_version(void); - -#endif /* DLM_VER_H */ diff --git a/fs/ocfs2/dlmfs/Makefile b/fs/ocfs2/dlmfs/Makefile index f14be89..eed3db8c 100644 --- a/fs/ocfs2/dlmfs/Makefile +++ b/fs/ocfs2/dlmfs/Makefile @@ -2,4 +2,4 @@ ccflags-y := -Ifs/ocfs2 obj-$(CONFIG_OCFS2_FS) += ocfs2_dlmfs.o -ocfs2_dlmfs-objs := userdlm.o dlmfs.o dlmfsver.o +ocfs2_dlmfs-objs := userdlm.o dlmfs.o diff --git a/fs/ocfs2/dlmfs/dlmfs.c b/fs/ocfs2/dlmfs/dlmfs.c index efa2b3d..09b7d9d 100644 --- a/fs/ocfs2/dlmfs/dlmfs.c +++ b/fs/ocfs2/dlmfs/dlmfs.c @@ -49,7 +49,6 @@ #include "stackglue.h" #include "userdlm.h" -#include "dlmfsver.h" #define MLOG_MASK_PREFIX ML_DLMFS #include "cluster/masklog.h" @@ -644,8 +643,6 @@ static int __init init_dlmfs_fs(void) int status; int cleanup_inode = 0, cleanup_worker = 0; - dlmfs_print_version(); - status = bdi_init(&dlmfs_backing_dev_info); if (status) return status; @@ -701,6 +698,7 @@ static void __exit exit_dlmfs_fs(void) MODULE_AUTHOR("Oracle"); MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("OCFS2 DLM-Filesystem"); module_init(init_dlmfs_fs) module_exit(exit_dlmfs_fs) diff --git a/fs/ocfs2/dlmfs/dlmfsver.c b/fs/ocfs2/dlmfs/dlmfsver.c deleted file mode 100644 index a733b33..0000000 --- a/fs/ocfs2/dlmfs/dlmfsver.c +++ /dev/null @@ -1,42 +0,0 @@ -/* -*- mode: c; c-basic-offset: 8; -*- - * vim: noexpandtab sw=8 ts=8 sts=0: - * - * dlmfsver.c - * - * version string - * - * Copyright (C) 2002, 2005 Oracle. All rights reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public - * License along with this program; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 021110-1307, USA. - */ - -#include <linux/module.h> -#include <linux/kernel.h> - -#include "dlmfsver.h" - -#define DLM_BUILD_VERSION "1.5.0" - -#define VERSION_STR "OCFS2 DLMFS " DLM_BUILD_VERSION - -void dlmfs_print_version(void) -{ - printk(KERN_INFO "%s\n", VERSION_STR); -} - -MODULE_DESCRIPTION(VERSION_STR); - -MODULE_VERSION(DLM_BUILD_VERSION); diff --git a/fs/ocfs2/dlmfs/dlmfsver.h b/fs/ocfs2/dlmfs/dlmfsver.h deleted file mode 100644 index f35eadb..0000000 --- a/fs/ocfs2/dlmfs/dlmfsver.h +++ /dev/null @@ -1,31 +0,0 @@ -/* -*- mode: c; c-basic-offset: 8; -*- - * vim: noexpandtab sw=8 ts=8 sts=0: - * - * dlmver.h - * - * Function prototypes - * - * Copyright (C) 2005 Oracle. All rights reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public - * License along with this program; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 021110-1307, USA. - */ - -#ifndef DLMFS_VER_H -#define DLMFS_VER_H - -void dlmfs_print_version(void); - -#endif /* DLMFS_VER_H */ diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c index 3407b2c..1998695 100644 --- a/fs/ocfs2/dlmglue.c +++ b/fs/ocfs2/dlmglue.c @@ -2996,6 +2996,8 @@ int ocfs2_dlm_init(struct ocfs2_super *osb) /* for now, uuid == domain */ status = ocfs2_cluster_connect(osb->osb_cluster_stack, + osb->osb_cluster_name, + strlen(osb->osb_cluster_name), osb->uuid_str, strlen(osb->uuid_str), &lproto, ocfs2_do_node_down, osb, @@ -3005,7 +3007,7 @@ int ocfs2_dlm_init(struct ocfs2_super *osb) goto bail; } - status = ocfs2_cluster_this_node(&osb->node_num); + status = ocfs2_cluster_this_node(conn, &osb->node_num); if (status < 0) { mlog_errno(status); mlog(ML_ERROR, diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c index 6fff128..f42eece 100644 --- a/fs/ocfs2/file.c +++ b/fs/ocfs2/file.c @@ -1869,7 +1869,8 @@ static int __ocfs2_change_file_space(struct file *file, struct inode *inode, } size = sr->l_start + sr->l_len; - if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) { + if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64 || + cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) { if (sr->l_len <= 0) { ret = -EINVAL; goto out_inode_unlock; diff --git a/fs/ocfs2/ioctl.c b/fs/ocfs2/ioctl.c index fa32ce9..8ca3c29 100644 --- a/fs/ocfs2/ioctl.c +++ b/fs/ocfs2/ioctl.c @@ -7,6 +7,7 @@ #include <linux/fs.h> #include <linux/mount.h> +#include <linux/blkdev.h> #include <linux/compat.h> #include <cluster/masklog.h> @@ -966,15 +967,21 @@ long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) case FITRIM: { struct super_block *sb = inode->i_sb; + struct request_queue *q = bdev_get_queue(sb->s_bdev); struct fstrim_range range; int ret = 0; if (!capable(CAP_SYS_ADMIN)) return -EPERM; + if (!blk_queue_discard(q)) + return -EOPNOTSUPP; + if (copy_from_user(&range, argp, sizeof(range))) return -EFAULT; + range.minlen = max_t(u64, q->limits.discard_granularity, + range.minlen); ret = ocfs2_trim_fs(sb, &range); if (ret < 0) return ret; diff --git a/fs/ocfs2/move_extents.c b/fs/ocfs2/move_extents.c index 631a982..64c304d 100644 --- a/fs/ocfs2/move_extents.c +++ b/fs/ocfs2/move_extents.c @@ -561,83 +561,6 @@ static void ocfs2_probe_alloc_group(struct inode *inode, struct buffer_head *bh, mlog(0, "found phys_cpos: %u to fit the wanted moving.\n", *phys_cpos); } -static int ocfs2_alloc_dinode_update_counts(struct inode *inode, - handle_t *handle, - struct buffer_head *di_bh, - u32 num_bits, - u16 chain) -{ - int ret; - u32 tmp_used; - struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data; - struct ocfs2_chain_list *cl = - (struct ocfs2_chain_list *) &di->id2.i_chain; - - ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, - OCFS2_JOURNAL_ACCESS_WRITE); - if (ret < 0) { - mlog_errno(ret); - goto out; - } - - tmp_used = le32_to_cpu(di->id1.bitmap1.i_used); - di->id1.bitmap1.i_used = cpu_to_le32(num_bits + tmp_used); - le32_add_cpu(&cl->cl_recs[chain].c_free, -num_bits); - ocfs2_journal_dirty(handle, di_bh); - -out: - return ret; -} - -static inline int ocfs2_block_group_set_bits(handle_t *handle, - struct inode *alloc_inode, - struct ocfs2_group_desc *bg, - struct buffer_head *group_bh, - unsigned int bit_off, - unsigned int num_bits) -{ - int status; - void *bitmap = bg->bg_bitmap; - int journal_type = OCFS2_JOURNAL_ACCESS_WRITE; - - /* All callers get the descriptor via - * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ - BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); - BUG_ON(le16_to_cpu(bg->bg_free_bits_count) < num_bits); - - mlog(0, "block_group_set_bits: off = %u, num = %u\n", bit_off, - num_bits); - - if (ocfs2_is_cluster_bitmap(alloc_inode)) - journal_type = OCFS2_JOURNAL_ACCESS_UNDO; - - status = ocfs2_journal_access_gd(handle, - INODE_CACHE(alloc_inode), - group_bh, - journal_type); - if (status < 0) { - mlog_errno(status); - goto bail; - } - - le16_add_cpu(&bg->bg_free_bits_count, -num_bits); - if (le16_to_cpu(bg->bg_free_bits_count) > le16_to_cpu(bg->bg_bits)) { - ocfs2_error(alloc_inode->i_sb, "Group descriptor # %llu has bit" - " count %u but claims %u are freed. num_bits %d", - (unsigned long long)le64_to_cpu(bg->bg_blkno), - le16_to_cpu(bg->bg_bits), - le16_to_cpu(bg->bg_free_bits_count), num_bits); - return -EROFS; - } - while (num_bits--) - ocfs2_set_bit(bit_off++, bitmap); - - ocfs2_journal_dirty(handle, group_bh); - -bail: - return status; -} - static int ocfs2_move_extent(struct ocfs2_move_extents_context *context, u32 cpos, u32 phys_cpos, u32 *new_phys_cpos, u32 len, int ext_flags) diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h index 3a90347..553f53c 100644 --- a/fs/ocfs2/ocfs2.h +++ b/fs/ocfs2/ocfs2.h @@ -387,6 +387,7 @@ struct ocfs2_super u8 osb_stackflags; char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; + char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1]; struct ocfs2_cluster_connection *cconn; struct ocfs2_lock_res osb_super_lockres; struct ocfs2_lock_res osb_rename_lockres; diff --git a/fs/ocfs2/stack_o2cb.c b/fs/ocfs2/stack_o2cb.c index bf1f893..1724d43 100644 --- a/fs/ocfs2/stack_o2cb.c +++ b/fs/ocfs2/stack_o2cb.c @@ -398,7 +398,8 @@ static int o2cb_cluster_disconnect(struct ocfs2_cluster_connection *conn) return 0; } -static int o2cb_cluster_this_node(unsigned int *node) +static int o2cb_cluster_this_node(struct ocfs2_cluster_connection *conn, + unsigned int *node) { int node_num; diff --git a/fs/ocfs2/stack_user.c b/fs/ocfs2/stack_user.c index 286edf1..13a8537 100644 --- a/fs/ocfs2/stack_user.c +++ b/fs/ocfs2/stack_user.c @@ -23,6 +23,7 @@ #include <linux/mutex.h> #include <linux/slab.h> #include <linux/reboot.h> +#include <linux/sched.h> #include <asm/uaccess.h> #include "stackglue.h" @@ -102,6 +103,12 @@ #define OCFS2_TEXT_UUID_LEN 32 #define OCFS2_CONTROL_MESSAGE_VERNUM_LEN 2 #define OCFS2_CONTROL_MESSAGE_NODENUM_LEN 8 +#define VERSION_LOCK "version_lock" + +enum ocfs2_connection_type { + WITH_CONTROLD, + NO_CONTROLD +}; /* * ocfs2_live_connection is refcounted because the filesystem and @@ -110,6 +117,13 @@ struct ocfs2_live_connection { struct list_head oc_list; struct ocfs2_cluster_connection *oc_conn; + enum ocfs2_connection_type oc_type; + atomic_t oc_this_node; + int oc_our_slot; + struct dlm_lksb oc_version_lksb; + char oc_lvb[DLM_LVB_LEN]; + struct completion oc_sync_wait; + wait_queue_head_t oc_wait; }; struct ocfs2_control_private { @@ -198,20 +212,15 @@ static struct ocfs2_live_connection *ocfs2_connection_find(const char *name) * mount path. Since the VFS prevents multiple calls to * fill_super(), we can't get dupes here. */ -static int ocfs2_live_connection_new(struct ocfs2_cluster_connection *conn, - struct ocfs2_live_connection **c_ret) +static int ocfs2_live_connection_attach(struct ocfs2_cluster_connection *conn, + struct ocfs2_live_connection *c) { int rc = 0; - struct ocfs2_live_connection *c; - - c = kzalloc(sizeof(struct ocfs2_live_connection), GFP_KERNEL); - if (!c) - return -ENOMEM; mutex_lock(&ocfs2_control_lock); c->oc_conn = conn; - if (atomic_read(&ocfs2_control_opened)) + if ((c->oc_type == NO_CONTROLD) || atomic_read(&ocfs2_control_opened)) list_add(&c->oc_list, &ocfs2_live_connection_list); else { printk(KERN_ERR @@ -220,12 +229,6 @@ static int ocfs2_live_connection_new(struct ocfs2_cluster_connection *conn, } mutex_unlock(&ocfs2_control_lock); - - if (!rc) - *c_ret = c; - else - kfree(c); - return rc; } @@ -799,18 +802,251 @@ static int fs_protocol_compare(struct ocfs2_protocol_version *existing, return 0; } +static void lvb_to_version(char *lvb, struct ocfs2_protocol_version *ver) +{ + struct ocfs2_protocol_version *pv = + (struct ocfs2_protocol_version *)lvb; + /* + * ocfs2_protocol_version has two u8 variables, so we don't + * need any endian conversion. + */ + ver->pv_major = pv->pv_major; + ver->pv_minor = pv->pv_minor; +} + +static void version_to_lvb(struct ocfs2_protocol_version *ver, char *lvb) +{ + struct ocfs2_protocol_version *pv = + (struct ocfs2_protocol_version *)lvb; + /* + * ocfs2_protocol_version has two u8 variables, so we don't + * need any endian conversion. + */ + pv->pv_major = ver->pv_major; + pv->pv_minor = ver->pv_minor; +} + +static void sync_wait_cb(void *arg) +{ + struct ocfs2_cluster_connection *conn = arg; + struct ocfs2_live_connection *lc = conn->cc_private; + complete(&lc->oc_sync_wait); +} + +static int sync_unlock(struct ocfs2_cluster_connection *conn, + struct dlm_lksb *lksb, char *name) +{ + int error; + struct ocfs2_live_connection *lc = conn->cc_private; + + error = dlm_unlock(conn->cc_lockspace, lksb->sb_lkid, 0, lksb, conn); + if (error) { + printk(KERN_ERR "%s lkid %x error %d\n", + name, lksb->sb_lkid, error); + return error; + } + + wait_for_completion(&lc->oc_sync_wait); + + if (lksb->sb_status != -DLM_EUNLOCK) { + printk(KERN_ERR "%s lkid %x status %d\n", + name, lksb->sb_lkid, lksb->sb_status); + return -1; + } + return 0; +} + +static int sync_lock(struct ocfs2_cluster_connection *conn, + int mode, uint32_t flags, + struct dlm_lksb *lksb, char *name) +{ + int error, status; + struct ocfs2_live_connection *lc = conn->cc_private; + + error = dlm_lock(conn->cc_lockspace, mode, lksb, flags, + name, strlen(name), + 0, sync_wait_cb, conn, NULL); + if (error) { + printk(KERN_ERR "%s lkid %x flags %x mode %d error %d\n", + name, lksb->sb_lkid, flags, mode, error); + return error; + } + + wait_for_completion(&lc->oc_sync_wait); + + status = lksb->sb_status; + + if (status && status != -EAGAIN) { + printk(KERN_ERR "%s lkid %x flags %x mode %d status %d\n", + name, lksb->sb_lkid, flags, mode, status); + } + + return status; +} + + +static int version_lock(struct ocfs2_cluster_connection *conn, int mode, + int flags) +{ + struct ocfs2_live_connection *lc = conn->cc_private; + return sync_lock(conn, mode, flags, + &lc->oc_version_lksb, VERSION_LOCK); +} + +static int version_unlock(struct ocfs2_cluster_connection *conn) +{ + struct ocfs2_live_connection *lc = conn->cc_private; + return sync_unlock(conn, &lc->oc_version_lksb, VERSION_LOCK); +} + +/* get_protocol_version() + * + * To exchange ocfs2 versioning, we use the LVB of the version dlm lock. + * The algorithm is: + * 1. Attempt to take the lock in EX mode (non-blocking). + * 2. If successful (which means it is the first mount), write the + * version number and downconvert to PR lock. + * 3. If unsuccessful (returns -EAGAIN), read the version from the LVB after + * taking the PR lock. + */ + +static int get_protocol_version(struct ocfs2_cluster_connection *conn) +{ + int ret; + struct ocfs2_live_connection *lc = conn->cc_private; + struct ocfs2_protocol_version pv; + + running_proto.pv_major = + ocfs2_user_plugin.sp_max_proto.pv_major; + running_proto.pv_minor = + ocfs2_user_plugin.sp_max_proto.pv_minor; + + lc->oc_version_lksb.sb_lvbptr = lc->oc_lvb; + ret = version_lock(conn, DLM_LOCK_EX, + DLM_LKF_VALBLK|DLM_LKF_NOQUEUE); + if (!ret) { + conn->cc_version.pv_major = running_proto.pv_major; + conn->cc_version.pv_minor = running_proto.pv_minor; + version_to_lvb(&running_proto, lc->oc_lvb); + version_lock(conn, DLM_LOCK_PR, DLM_LKF_CONVERT|DLM_LKF_VALBLK); + } else if (ret == -EAGAIN) { + ret = version_lock(conn, DLM_LOCK_PR, DLM_LKF_VALBLK); + if (ret) + goto out; + lvb_to_version(lc->oc_lvb, &pv); + + if ((pv.pv_major != running_proto.pv_major) || + (pv.pv_minor > running_proto.pv_minor)) { + ret = -EINVAL; + goto out; + } + + conn->cc_version.pv_major = pv.pv_major; + conn->cc_version.pv_minor = pv.pv_minor; + } +out: + return ret; +} + +static void user_recover_prep(void *arg) +{ +} + +static void user_recover_slot(void *arg, struct dlm_slot *slot) +{ + struct ocfs2_cluster_connection *conn = arg; + printk(KERN_INFO "ocfs2: Node %d/%d down. Initiating recovery.\n", + slot->nodeid, slot->slot); + conn->cc_recovery_handler(slot->nodeid, conn->cc_recovery_data); + +} + +static void user_recover_done(void *arg, struct dlm_slot *slots, + int num_slots, int our_slot, + uint32_t generation) +{ + struct ocfs2_cluster_connection *conn = arg; + struct ocfs2_live_connection *lc = conn->cc_private; + int i; + + for (i = 0; i < num_slots; i++) + if (slots[i].slot == our_slot) { + atomic_set(&lc->oc_this_node, slots[i].nodeid); + break; + } + + lc->oc_our_slot = our_slot; + wake_up(&lc->oc_wait); +} + +static const struct dlm_lockspace_ops ocfs2_ls_ops = { + .recover_prep = user_recover_prep, + .recover_slot = user_recover_slot, + .recover_done = user_recover_done, +}; + +static int user_cluster_disconnect(struct ocfs2_cluster_connection *conn) +{ + version_unlock(conn); + dlm_release_lockspace(conn->cc_lockspace, 2); + conn->cc_lockspace = NULL; + ocfs2_live_connection_drop(conn->cc_private); + conn->cc_private = NULL; + return 0; +} + static int user_cluster_connect(struct ocfs2_cluster_connection *conn) { dlm_lockspace_t *fsdlm; - struct ocfs2_live_connection *uninitialized_var(control); - int rc = 0; + struct ocfs2_live_connection *lc; + int rc, ops_rv; BUG_ON(conn == NULL); - rc = ocfs2_live_connection_new(conn, &control); + lc = kzalloc(sizeof(struct ocfs2_live_connection), GFP_KERNEL); + if (!lc) { + rc = -ENOMEM; + goto out; + } + + init_waitqueue_head(&lc->oc_wait); + init_completion(&lc->oc_sync_wait); + atomic_set(&lc->oc_this_node, 0); + conn->cc_private = lc; + lc->oc_type = NO_CONTROLD; + + rc = dlm_new_lockspace(conn->cc_name, conn->cc_cluster_name, + DLM_LSFL_FS, DLM_LVB_LEN, + &ocfs2_ls_ops, conn, &ops_rv, &fsdlm); + if (rc) + goto out; + + if (ops_rv == -EOPNOTSUPP) { + lc->oc_type = WITH_CONTROLD; + printk(KERN_NOTICE "ocfs2: You seem to be using an older " + "version of dlm_controld and/or ocfs2-tools." + " Please consider upgrading.\n"); + } else if (ops_rv) { + rc = ops_rv; + goto out; + } + conn->cc_lockspace = fsdlm; + + rc = ocfs2_live_connection_attach(conn, lc); if (rc) goto out; + if (lc->oc_type == NO_CONTROLD) { + rc = get_protocol_version(conn); + if (rc) { + printk(KERN_ERR "ocfs2: Could not determine" + " locking version\n"); + user_cluster_disconnect(conn); + goto out; + } + wait_event(lc->oc_wait, (atomic_read(&lc->oc_this_node) > 0)); + } + /* * running_proto must have been set before we allowed any mounts * to proceed. @@ -818,42 +1054,34 @@ static int user_cluster_connect(struct ocfs2_cluster_connection *conn) if (fs_protocol_compare(&running_proto, &conn->cc_version)) { printk(KERN_ERR "Unable to mount with fs locking protocol version " - "%u.%u because the userspace control daemon has " - "negotiated %u.%u\n", + "%u.%u because negotiated protocol is %u.%u\n", conn->cc_version.pv_major, conn->cc_version.pv_minor, running_proto.pv_major, running_proto.pv_minor); rc = -EPROTO; - ocfs2_live_connection_drop(control); - goto out; - } - - rc = dlm_new_lockspace(conn->cc_name, NULL, DLM_LSFL_FS, DLM_LVB_LEN, - NULL, NULL, NULL, &fsdlm); - if (rc) { - ocfs2_live_connection_drop(control); - goto out; + ocfs2_live_connection_drop(lc); + lc = NULL; } - conn->cc_private = control; - conn->cc_lockspace = fsdlm; out: + if (rc && lc) + kfree(lc); return rc; } -static int user_cluster_disconnect(struct ocfs2_cluster_connection *conn) -{ - dlm_release_lockspace(conn->cc_lockspace, 2); - conn->cc_lockspace = NULL; - ocfs2_live_connection_drop(conn->cc_private); - conn->cc_private = NULL; - return 0; -} -static int user_cluster_this_node(unsigned int *this_node) +static int user_cluster_this_node(struct ocfs2_cluster_connection *conn, + unsigned int *this_node) { int rc; + struct ocfs2_live_connection *lc = conn->cc_private; + + if (lc->oc_type == WITH_CONTROLD) + rc = ocfs2_control_get_this_node(); + else if (lc->oc_type == NO_CONTROLD) + rc = atomic_read(&lc->oc_this_node); + else + rc = -EINVAL; - rc = ocfs2_control_get_this_node(); if (rc < 0) return rc; diff --git a/fs/ocfs2/stackglue.c b/fs/ocfs2/stackglue.c index cb7ec0b..1324e66 100644 --- a/fs/ocfs2/stackglue.c +++ b/fs/ocfs2/stackglue.c @@ -309,6 +309,8 @@ int ocfs2_plock(struct ocfs2_cluster_connection *conn, u64 ino, EXPORT_SYMBOL_GPL(ocfs2_plock); int ocfs2_cluster_connect(const char *stack_name, + const char *cluster_name, + int cluster_name_len, const char *group, int grouplen, struct ocfs2_locking_protocol *lproto, @@ -342,8 +344,10 @@ int ocfs2_cluster_connect(const char *stack_name, goto out; } - memcpy(new_conn->cc_name, group, grouplen); + strlcpy(new_conn->cc_name, group, GROUP_NAME_MAX + 1); new_conn->cc_namelen = grouplen; + strlcpy(new_conn->cc_cluster_name, cluster_name, CLUSTER_NAME_MAX + 1); + new_conn->cc_cluster_name_len = cluster_name_len; new_conn->cc_recovery_handler = recovery_handler; new_conn->cc_recovery_data = recovery_data; @@ -386,8 +390,9 @@ int ocfs2_cluster_connect_agnostic(const char *group, if (cluster_stack_name[0]) stack_name = cluster_stack_name; - return ocfs2_cluster_connect(stack_name, group, grouplen, lproto, - recovery_handler, recovery_data, conn); + return ocfs2_cluster_connect(stack_name, NULL, 0, group, grouplen, + lproto, recovery_handler, recovery_data, + conn); } EXPORT_SYMBOL_GPL(ocfs2_cluster_connect_agnostic); @@ -460,9 +465,10 @@ void ocfs2_cluster_hangup(const char *group, int grouplen) } EXPORT_SYMBOL_GPL(ocfs2_cluster_hangup); -int ocfs2_cluster_this_node(unsigned int *node) +int ocfs2_cluster_this_node(struct ocfs2_cluster_connection *conn, + unsigned int *node) { - return active_stack->sp_ops->this_node(node); + return active_stack->sp_ops->this_node(conn, node); } EXPORT_SYMBOL_GPL(ocfs2_cluster_this_node); diff --git a/fs/ocfs2/stackglue.h b/fs/ocfs2/stackglue.h index 1ec56fd..66334a3 100644 --- a/fs/ocfs2/stackglue.h +++ b/fs/ocfs2/stackglue.h @@ -45,6 +45,9 @@ struct file_lock; */ #define GROUP_NAME_MAX 64 +/* This shadows OCFS2_CLUSTER_NAME_LEN */ +#define CLUSTER_NAME_MAX 16 + /* * ocfs2_protocol_version changes when ocfs2 does something different in @@ -97,8 +100,10 @@ struct ocfs2_locking_protocol { * locking compatibility. */ struct ocfs2_cluster_connection { - char cc_name[GROUP_NAME_MAX]; + char cc_name[GROUP_NAME_MAX + 1]; int cc_namelen; + char cc_cluster_name[CLUSTER_NAME_MAX + 1]; + int cc_cluster_name_len; struct ocfs2_protocol_version cc_version; struct ocfs2_locking_protocol *cc_proto; void (*cc_recovery_handler)(int node_num, void *recovery_data); @@ -152,7 +157,8 @@ struct ocfs2_stack_operations { * ->this_node() returns the cluster's unique identifier for the * local node. */ - int (*this_node)(unsigned int *node); + int (*this_node)(struct ocfs2_cluster_connection *conn, + unsigned int *node); /* * Call the underlying dlm lock function. The ->dlm_lock() @@ -239,6 +245,8 @@ struct ocfs2_stack_plugin { /* Used by the filesystem */ int ocfs2_cluster_connect(const char *stack_name, + const char *cluster_name, + int cluster_name_len, const char *group, int grouplen, struct ocfs2_locking_protocol *lproto, @@ -260,7 +268,8 @@ int ocfs2_cluster_connect_agnostic(const char *group, int ocfs2_cluster_disconnect(struct ocfs2_cluster_connection *conn, int hangup_pending); void ocfs2_cluster_hangup(const char *group, int grouplen); -int ocfs2_cluster_this_node(unsigned int *node); +int ocfs2_cluster_this_node(struct ocfs2_cluster_connection *conn, + unsigned int *node); struct ocfs2_lock_res; int ocfs2_dlm_lock(struct ocfs2_cluster_connection *conn, diff --git a/fs/ocfs2/suballoc.c b/fs/ocfs2/suballoc.c index 2c91452..47ae266 100644 --- a/fs/ocfs2/suballoc.c +++ b/fs/ocfs2/suballoc.c @@ -113,12 +113,6 @@ static int ocfs2_claim_suballoc_bits(struct ocfs2_alloc_context *ac, struct ocfs2_suballoc_result *res); static int ocfs2_test_bg_bit_allocatable(struct buffer_head *bg_bh, int nr); -static inline int ocfs2_block_group_set_bits(handle_t *handle, - struct inode *alloc_inode, - struct ocfs2_group_desc *bg, - struct buffer_head *group_bh, - unsigned int bit_off, - unsigned int num_bits); static int ocfs2_relink_block_group(handle_t *handle, struct inode *alloc_inode, struct buffer_head *fe_bh, @@ -1343,7 +1337,7 @@ static int ocfs2_block_group_find_clear_bits(struct ocfs2_super *osb, return status; } -static inline int ocfs2_block_group_set_bits(handle_t *handle, +int ocfs2_block_group_set_bits(handle_t *handle, struct inode *alloc_inode, struct ocfs2_group_desc *bg, struct buffer_head *group_bh, @@ -1388,8 +1382,6 @@ static inline int ocfs2_block_group_set_bits(handle_t *handle, ocfs2_journal_dirty(handle, group_bh); bail: - if (status) - mlog_errno(status); return status; } @@ -1588,7 +1580,7 @@ static int ocfs2_block_group_search(struct inode *inode, return ret; } -static int ocfs2_alloc_dinode_update_counts(struct inode *inode, +int ocfs2_alloc_dinode_update_counts(struct inode *inode, handle_t *handle, struct buffer_head *di_bh, u32 num_bits, diff --git a/fs/ocfs2/suballoc.h b/fs/ocfs2/suballoc.h index a36d0aa..218d803 100644 --- a/fs/ocfs2/suballoc.h +++ b/fs/ocfs2/suballoc.h @@ -86,6 +86,18 @@ int ocfs2_reserve_clusters(struct ocfs2_super *osb, u32 bits_wanted, struct ocfs2_alloc_context **ac); +int ocfs2_alloc_dinode_update_counts(struct inode *inode, + handle_t *handle, + struct buffer_head *di_bh, + u32 num_bits, + u16 chain); +int ocfs2_block_group_set_bits(handle_t *handle, + struct inode *alloc_inode, + struct ocfs2_group_desc *bg, + struct buffer_head *group_bh, + unsigned int bit_off, + unsigned int num_bits); + int ocfs2_claim_metadata(handle_t *handle, struct ocfs2_alloc_context *ac, u32 bits_wanted, diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c index c414929..49d84f8 100644 --- a/fs/ocfs2/super.c +++ b/fs/ocfs2/super.c @@ -68,7 +68,6 @@ #include "super.h" #include "sysfile.h" #include "uptodate.h" -#include "ver.h" #include "xattr.h" #include "quota.h" #include "refcounttree.h" @@ -90,6 +89,7 @@ static struct dentry *ocfs2_debugfs_root = NULL; MODULE_AUTHOR("Oracle"); MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("OCFS2 cluster file system"); struct mount_options { @@ -1618,8 +1618,6 @@ static int __init ocfs2_init(void) { int status, i; - ocfs2_print_version(); - for (i = 0; i < OCFS2_IOEND_WQ_HASH_SZ; i++) init_waitqueue_head(&ocfs2__ioend_wq[i]); @@ -1947,11 +1945,15 @@ static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) ocfs2_shutdown_local_alloc(osb); - ocfs2_truncate_log_shutdown(osb); - /* This will disable recovery and flush any recovery work. */ ocfs2_recovery_exit(osb); + /* + * During dismount, when it recovers another node it will call + * ocfs2_recover_orphans and queue delayed work osb_truncate_log_wq. + */ + ocfs2_truncate_log_shutdown(osb); + ocfs2_journal_shutdown(osb); ocfs2_sync_blockdev(sb); @@ -2225,10 +2227,9 @@ static int ocfs2_initialize_super(struct super_block *sb, if (ocfs2_clusterinfo_valid(osb)) { osb->osb_stackflags = OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; - memcpy(osb->osb_cluster_stack, + strlcpy(osb->osb_cluster_stack, OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, - OCFS2_STACK_LABEL_LEN); - osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; + OCFS2_STACK_LABEL_LEN + 1); if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { mlog(ML_ERROR, "couldn't mount because of an invalid " @@ -2237,6 +2238,9 @@ static int ocfs2_initialize_super(struct super_block *sb, status = -EINVAL; goto bail; } + strlcpy(osb->osb_cluster_name, + OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster, + OCFS2_CLUSTER_NAME_LEN + 1); } else { /* The empty string is identical with classic tools that * don't know about s_cluster_info. */ diff --git a/fs/ocfs2/ver.c b/fs/ocfs2/ver.c deleted file mode 100644 index e2488f4..0000000 --- a/fs/ocfs2/ver.c +++ /dev/null @@ -1,43 +0,0 @@ -/* -*- mode: c; c-basic-offset: 8; -*- - * vim: noexpandtab sw=8 ts=8 sts=0: - * - * ver.c - * - * version string - * - * Copyright (C) 2002, 2005 Oracle. All rights reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public - * License along with this program; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 021110-1307, USA. - */ - -#include <linux/module.h> -#include <linux/string.h> -#include <linux/kernel.h> - -#include "ver.h" - -#define OCFS2_BUILD_VERSION "1.5.0" - -#define VERSION_STR "OCFS2 " OCFS2_BUILD_VERSION - -void ocfs2_print_version(void) -{ - printk(KERN_INFO "%s\n", VERSION_STR); -} - -MODULE_DESCRIPTION(VERSION_STR); - -MODULE_VERSION(OCFS2_BUILD_VERSION); diff --git a/fs/ocfs2/ver.h b/fs/ocfs2/ver.h deleted file mode 100644 index d7395cb..0000000 --- a/fs/ocfs2/ver.h +++ /dev/null @@ -1,31 +0,0 @@ -/* -*- mode: c; c-basic-offset: 8; -*- - * vim: noexpandtab sw=8 ts=8 sts=0: - * - * ver.h - * - * Function prototypes - * - * Copyright (C) 2002, 2004 Oracle. All rights reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public - * License along with this program; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 021110-1307, USA. - */ - -#ifndef OCFS2_VER_H -#define OCFS2_VER_H - -void ocfs2_print_version(void); - -#endif /* OCFS2_VER_H */ diff --git a/fs/posix_acl.c b/fs/posix_acl.c index 8bd2135..021e7c0 100644 --- a/fs/posix_acl.c +++ b/fs/posix_acl.c @@ -22,11 +22,80 @@ #include <linux/errno.h> -EXPORT_SYMBOL(posix_acl_init); -EXPORT_SYMBOL(posix_acl_alloc); -EXPORT_SYMBOL(posix_acl_valid); -EXPORT_SYMBOL(posix_acl_equiv_mode); -EXPORT_SYMBOL(posix_acl_from_mode); +struct posix_acl **acl_by_type(struct inode *inode, int type) +{ + switch (type) { + case ACL_TYPE_ACCESS: + return &inode->i_acl; + case ACL_TYPE_DEFAULT: + return &inode->i_default_acl; + default: + BUG(); + } +} +EXPORT_SYMBOL(acl_by_type); + +struct posix_acl *get_cached_acl(struct inode *inode, int type) +{ + struct posix_acl **p = acl_by_type(inode, type); + struct posix_acl *acl = ACCESS_ONCE(*p); + if (acl) { + spin_lock(&inode->i_lock); + acl = *p; + if (acl != ACL_NOT_CACHED) + acl = posix_acl_dup(acl); + spin_unlock(&inode->i_lock); + } + return acl; +} +EXPORT_SYMBOL(get_cached_acl); + +struct posix_acl *get_cached_acl_rcu(struct inode *inode, int type) +{ + return rcu_dereference(*acl_by_type(inode, type)); +} +EXPORT_SYMBOL(get_cached_acl_rcu); + +void set_cached_acl(struct inode *inode, int type, struct posix_acl *acl) +{ + struct posix_acl **p = acl_by_type(inode, type); + struct posix_acl *old; + spin_lock(&inode->i_lock); + old = *p; + rcu_assign_pointer(*p, posix_acl_dup(acl)); + spin_unlock(&inode->i_lock); + if (old != ACL_NOT_CACHED) + posix_acl_release(old); +} +EXPORT_SYMBOL(set_cached_acl); + +void forget_cached_acl(struct inode *inode, int type) +{ + struct posix_acl **p = acl_by_type(inode, type); + struct posix_acl *old; + spin_lock(&inode->i_lock); + old = *p; + *p = ACL_NOT_CACHED; + spin_unlock(&inode->i_lock); + if (old != ACL_NOT_CACHED) + posix_acl_release(old); +} +EXPORT_SYMBOL(forget_cached_acl); + +void forget_all_cached_acls(struct inode *inode) +{ + struct posix_acl *old_access, *old_default; + spin_lock(&inode->i_lock); + old_access = inode->i_acl; + old_default = inode->i_default_acl; + inode->i_acl = inode->i_default_acl = ACL_NOT_CACHED; + spin_unlock(&inode->i_lock); + if (old_access != ACL_NOT_CACHED) + posix_acl_release(old_access); + if (old_default != ACL_NOT_CACHED) + posix_acl_release(old_default); +} +EXPORT_SYMBOL(forget_all_cached_acls); /* * Init a fresh posix_acl @@ -37,6 +106,7 @@ posix_acl_init(struct posix_acl *acl, int count) atomic_set(&acl->a_refcount, 1); acl->a_count = count; } +EXPORT_SYMBOL(posix_acl_init); /* * Allocate a new ACL with the specified number of entries. @@ -51,6 +121,7 @@ posix_acl_alloc(int count, gfp_t flags) posix_acl_init(acl, count); return acl; } +EXPORT_SYMBOL(posix_acl_alloc); /* * Clone an ACL. @@ -146,6 +217,7 @@ posix_acl_valid(const struct posix_acl *acl) return 0; return -EINVAL; } +EXPORT_SYMBOL(posix_acl_valid); /* * Returns 0 if the acl can be exactly represented in the traditional @@ -186,6 +258,7 @@ posix_acl_equiv_mode(const struct posix_acl *acl, umode_t *mode_p) *mode_p = (*mode_p & ~S_IRWXUGO) | mode; return not_equiv; } +EXPORT_SYMBOL(posix_acl_equiv_mode); /* * Create an ACL representing the file mode permission bits of an inode. @@ -207,6 +280,7 @@ posix_acl_from_mode(umode_t mode, gfp_t flags) acl->a_entries[2].e_perm = (mode & S_IRWXO); return acl; } +EXPORT_SYMBOL(posix_acl_from_mode); /* * Return 0 if current is granted want access to the inode diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c index a77d2b2..24270ec 100644 --- a/fs/proc/meminfo.c +++ b/fs/proc/meminfo.c @@ -26,7 +26,11 @@ static int meminfo_proc_show(struct seq_file *m, void *v) unsigned long committed; struct vmalloc_info vmi; long cached; + long available; + unsigned long pagecache; + unsigned long wmark_low = 0; unsigned long pages[NR_LRU_LISTS]; + struct zone *zone; int lru; /* @@ -47,12 +51,44 @@ static int meminfo_proc_show(struct seq_file *m, void *v) for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++) pages[lru] = global_page_state(NR_LRU_BASE + lru); + for_each_zone(zone) + wmark_low += zone->watermark[WMARK_LOW]; + + /* + * Estimate the amount of memory available for userspace allocations, + * without causing swapping. + * + * Free memory cannot be taken below the low watermark, before the + * system starts swapping. + */ + available = i.freeram - wmark_low; + + /* + * Not all the page cache can be freed, otherwise the system will + * start swapping. Assume at least half of the page cache, or the + * low watermark worth of cache, needs to stay. + */ + pagecache = pages[LRU_ACTIVE_FILE] + pages[LRU_INACTIVE_FILE]; + pagecache -= min(pagecache / 2, wmark_low); + available += pagecache; + + /* + * Part of the reclaimable swap consists of items that are in use, + * and cannot be freed. Cap this estimate at the low watermark. + */ + available += global_page_state(NR_SLAB_RECLAIMABLE) - + min(global_page_state(NR_SLAB_RECLAIMABLE) / 2, wmark_low); + + if (available < 0) + available = 0; + /* * Tagged format, for easy grepping and expansion. */ seq_printf(m, "MemTotal: %8lu kB\n" "MemFree: %8lu kB\n" + "MemAvailable: %8lu kB\n" "Buffers: %8lu kB\n" "Cached: %8lu kB\n" "SwapCached: %8lu kB\n" @@ -105,6 +141,7 @@ static int meminfo_proc_show(struct seq_file *m, void *v) , K(i.totalram), K(i.freeram), + K(available), K(i.bufferram), K(cached), K(total_swapcache_pages()), diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c index 39d1465..6a3e2c4 100644 --- a/fs/ramfs/inode.c +++ b/fs/ramfs/inode.c @@ -275,4 +275,4 @@ int __init init_ramfs_fs(void) return err; } -module_init(init_ramfs_fs) +fs_initcall(init_ramfs_fs); diff --git a/fs/read_write.c b/fs/read_write.c index 58e440d..1193ffd 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -901,10 +901,6 @@ static ssize_t compat_do_readv_writev(int type, struct file *file, io_fn_t fn; iov_fn_t fnv; - ret = -EFAULT; - if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector))) - goto out; - ret = compat_rw_copy_check_uvector(type, uvector, nr_segs, UIO_FASTIOV, iovstack, &iov); if (ret <= 0) @@ -166,6 +166,8 @@ static struct super_block *alloc_super(struct file_system_type *type, int flags) if (!s) return NULL; + INIT_LIST_HEAD(&s->s_mounts); + if (security_sb_alloc(s)) goto fail; @@ -188,7 +190,6 @@ static struct super_block *alloc_super(struct file_system_type *type, int flags) if (list_lru_init(&s->s_inode_lru)) goto fail; - INIT_LIST_HEAD(&s->s_mounts); init_rwsem(&s->s_umount); lockdep_set_class(&s->s_umount, &type->s_umount_key); /* |
