diff options
Diffstat (limited to 'fs/notify')
-rw-r--r-- | fs/notify/dnotify/dnotify.c | 2 | ||||
-rw-r--r-- | fs/notify/fanotify/Kconfig | 1 | ||||
-rw-r--r-- | fs/notify/fanotify/fanotify.c | 16 | ||||
-rw-r--r-- | fs/notify/fsnotify.c | 8 | ||||
-rw-r--r-- | fs/notify/inotify/Kconfig | 1 | ||||
-rw-r--r-- | fs/notify/inotify/inotify.h | 2 | ||||
-rw-r--r-- | fs/notify/inotify/inotify_fsnotify.c | 6 | ||||
-rw-r--r-- | fs/notify/mark.c | 12 |
8 files changed, 28 insertions, 20 deletions
diff --git a/fs/notify/dnotify/dnotify.c b/fs/notify/dnotify/dnotify.c index 58d77dc696eb..250369d6901d 100644 --- a/fs/notify/dnotify/dnotify.c +++ b/fs/notify/dnotify/dnotify.c @@ -81,7 +81,7 @@ static void dnotify_recalc_inode_mask(struct fsnotify_mark *fsn_mark) static int dnotify_handle_event(struct fsnotify_group *group, struct inode *inode, u32 mask, const void *data, int data_type, - const unsigned char *file_name, u32 cookie, + const struct qstr *file_name, u32 cookie, struct fsnotify_iter_info *iter_info) { struct fsnotify_mark *inode_mark = fsnotify_iter_inode_mark(iter_info); diff --git a/fs/notify/fanotify/Kconfig b/fs/notify/fanotify/Kconfig index 735bfb2e9190..521dc91d2cb5 100644 --- a/fs/notify/fanotify/Kconfig +++ b/fs/notify/fanotify/Kconfig @@ -1,7 +1,6 @@ config FANOTIFY bool "Filesystem wide access notification" select FSNOTIFY - select ANON_INODES select EXPORTFS default n ---help--- diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c index 6b9c27548997..e6fde1a5c072 100644 --- a/fs/notify/fanotify/fanotify.c +++ b/fs/notify/fanotify/fanotify.c @@ -346,10 +346,16 @@ static __kernel_fsid_t fanotify_get_fsid(struct fsnotify_iter_info *iter_info) __kernel_fsid_t fsid = {}; fsnotify_foreach_obj_type(type) { + struct fsnotify_mark_connector *conn; + if (!fsnotify_iter_should_report_type(iter_info, type)) continue; - fsid = iter_info->marks[type]->connector->fsid; + conn = READ_ONCE(iter_info->marks[type]->connector); + /* Mark is just getting destroyed or created? */ + if (!conn) + continue; + fsid = conn->fsid; if (WARN_ON_ONCE(!fsid.val[0] && !fsid.val[1])) continue; return fsid; @@ -361,7 +367,7 @@ static __kernel_fsid_t fanotify_get_fsid(struct fsnotify_iter_info *iter_info) static int fanotify_handle_event(struct fsnotify_group *group, struct inode *inode, u32 mask, const void *data, int data_type, - const unsigned char *file_name, u32 cookie, + const struct qstr *file_name, u32 cookie, struct fsnotify_iter_info *iter_info) { int ret = 0; @@ -408,8 +414,12 @@ static int fanotify_handle_event(struct fsnotify_group *group, return 0; } - if (FAN_GROUP_FLAG(group, FAN_REPORT_FID)) + if (FAN_GROUP_FLAG(group, FAN_REPORT_FID)) { fsid = fanotify_get_fsid(iter_info); + /* Racing with mark destruction or creation? */ + if (!fsid.val[0] && !fsid.val[1]) + return 0; + } event = fanotify_alloc_event(group, inode, mask, data, data_type, &fsid); diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c index df06f3da166c..5433e37fb0c5 100644 --- a/fs/notify/fsnotify.c +++ b/fs/notify/fsnotify.c @@ -179,10 +179,10 @@ int __fsnotify_parent(const struct path *path, struct dentry *dentry, __u32 mask take_dentry_name_snapshot(&name, dentry); if (path) ret = fsnotify(p_inode, mask, path, FSNOTIFY_EVENT_PATH, - name.name, 0); + &name.name, 0); else ret = fsnotify(p_inode, mask, dentry->d_inode, FSNOTIFY_EVENT_INODE, - name.name, 0); + &name.name, 0); release_dentry_name_snapshot(&name); } @@ -195,7 +195,7 @@ EXPORT_SYMBOL_GPL(__fsnotify_parent); static int send_to_group(struct inode *to_tell, __u32 mask, const void *data, int data_is, u32 cookie, - const unsigned char *file_name, + const struct qstr *file_name, struct fsnotify_iter_info *iter_info) { struct fsnotify_group *group = NULL; @@ -325,7 +325,7 @@ static void fsnotify_iter_next(struct fsnotify_iter_info *iter_info) * notification event in whatever means they feel necessary. */ int fsnotify(struct inode *to_tell, __u32 mask, const void *data, int data_is, - const unsigned char *file_name, u32 cookie) + const struct qstr *file_name, u32 cookie) { struct fsnotify_iter_info iter_info = {}; struct super_block *sb = to_tell->i_sb; diff --git a/fs/notify/inotify/Kconfig b/fs/notify/inotify/Kconfig index b981fc0c8379..0161c74e76e2 100644 --- a/fs/notify/inotify/Kconfig +++ b/fs/notify/inotify/Kconfig @@ -1,6 +1,5 @@ config INOTIFY_USER bool "Inotify support for userspace" - select ANON_INODES select FSNOTIFY default y ---help--- diff --git a/fs/notify/inotify/inotify.h b/fs/notify/inotify/inotify.h index 74ae60305189..3f246f7b8a92 100644 --- a/fs/notify/inotify/inotify.h +++ b/fs/notify/inotify/inotify.h @@ -27,7 +27,7 @@ extern void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark, extern int inotify_handle_event(struct fsnotify_group *group, struct inode *inode, u32 mask, const void *data, int data_type, - const unsigned char *file_name, u32 cookie, + const struct qstr *file_name, u32 cookie, struct fsnotify_iter_info *iter_info); 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 ff30abd6a49b..7e8b131029f8 100644 --- a/fs/notify/inotify/inotify_fsnotify.c +++ b/fs/notify/inotify/inotify_fsnotify.c @@ -67,7 +67,7 @@ static int inotify_merge(struct list_head *list, int inotify_handle_event(struct fsnotify_group *group, struct inode *inode, u32 mask, const void *data, int data_type, - const unsigned char *file_name, u32 cookie, + const struct qstr *file_name, u32 cookie, struct fsnotify_iter_info *iter_info) { struct fsnotify_mark *inode_mark = fsnotify_iter_inode_mark(iter_info); @@ -89,7 +89,7 @@ int inotify_handle_event(struct fsnotify_group *group, return 0; } if (file_name) { - len = strlen(file_name); + len = file_name->len; alloc_len += len + 1; } @@ -129,7 +129,7 @@ int inotify_handle_event(struct fsnotify_group *group, event->sync_cookie = cookie; event->name_len = len; if (len) - strcpy(event->name, file_name); + strcpy(event->name, file_name->name); ret = fsnotify_add_event(group, fsn_event, inotify_merge); if (ret) { diff --git a/fs/notify/mark.c b/fs/notify/mark.c index d593d4269561..22acb0a79b53 100644 --- a/fs/notify/mark.c +++ b/fs/notify/mark.c @@ -239,13 +239,13 @@ static void fsnotify_drop_object(unsigned int type, void *objp) void fsnotify_put_mark(struct fsnotify_mark *mark) { - struct fsnotify_mark_connector *conn; + struct fsnotify_mark_connector *conn = READ_ONCE(mark->connector); void *objp = NULL; unsigned int type = FSNOTIFY_OBJ_TYPE_DETACHED; bool free_conn = false; /* Catch marks that were actually never attached to object */ - if (!mark->connector) { + if (!conn) { if (refcount_dec_and_test(&mark->refcnt)) fsnotify_final_mark_destroy(mark); return; @@ -255,10 +255,9 @@ void fsnotify_put_mark(struct fsnotify_mark *mark) * We have to be careful so that traversals of obj_list under lock can * safely grab mark reference. */ - if (!refcount_dec_and_lock(&mark->refcnt, &mark->connector->lock)) + if (!refcount_dec_and_lock(&mark->refcnt, &conn->lock)) return; - conn = mark->connector; hlist_del_init_rcu(&mark->obj_list); if (hlist_empty(&conn->list)) { objp = fsnotify_detach_connector_from_object(conn, &type); @@ -266,7 +265,7 @@ void fsnotify_put_mark(struct fsnotify_mark *mark) } else { __fsnotify_recalc_mask(conn); } - mark->connector = NULL; + WRITE_ONCE(mark->connector, NULL); spin_unlock(&conn->lock); fsnotify_drop_object(type, objp); @@ -620,7 +619,7 @@ restart: /* mark should be the last entry. last is the current last entry */ hlist_add_behind_rcu(&mark->obj_list, &last->obj_list); added: - mark->connector = conn; + WRITE_ONCE(mark->connector, conn); out_err: spin_unlock(&conn->lock); spin_unlock(&mark->lock); @@ -808,6 +807,7 @@ void fsnotify_init_mark(struct fsnotify_mark *mark, refcount_set(&mark->refcnt, 1); fsnotify_get_group(group); mark->group = group; + WRITE_ONCE(mark->connector, NULL); } /* |