diff options
| -rw-r--r-- | fs/notify/fdinfo.c | 5 | ||||
| -rw-r--r-- | fs/notify/fsnotify.c | 8 | ||||
| -rw-r--r-- | fs/notify/fsnotify.h | 11 | ||||
| -rw-r--r-- | fs/notify/mark.c | 4 | ||||
| -rw-r--r-- | fs/super.c | 2 | ||||
| -rw-r--r-- | include/linux/fs.h | 5 | ||||
| -rw-r--r-- | include/linux/fsnotify_backend.h | 17 |
7 files changed, 47 insertions, 5 deletions
diff --git a/fs/notify/fdinfo.c b/fs/notify/fdinfo.c index 86fcf5814279..25385e336ac7 100644 --- a/fs/notify/fdinfo.c +++ b/fs/notify/fdinfo.c @@ -131,6 +131,11 @@ static void fanotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark) seq_printf(m, "fanotify mnt_id:%x mflags:%x mask:%x ignored_mask:%x\n", mnt->mnt_id, mflags, mark->mask, mark->ignored_mask); + } else if (mark->connector->type == FSNOTIFY_OBJ_TYPE_SB) { + struct super_block *sb = fsnotify_conn_sb(mark->connector); + + seq_printf(m, "fanotify sdev:%x mflags:%x mask:%x ignored_mask:%x\n", + sb->s_dev, mflags, mark->mask, mark->ignored_mask); } } diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c index ababdbfab537..2971803d151c 100644 --- a/fs/notify/fsnotify.c +++ b/fs/notify/fsnotify.c @@ -48,7 +48,7 @@ void __fsnotify_vfsmount_delete(struct vfsmount *mnt) * Called during unmount with no locks held, so needs to be safe against * concurrent modifiers. We temporarily drop sb->s_inode_list_lock and CAN block. */ -void fsnotify_unmount_inodes(struct super_block *sb) +static void fsnotify_unmount_inodes(struct super_block *sb) { struct inode *inode, *iput_inode = NULL; @@ -98,6 +98,12 @@ void fsnotify_unmount_inodes(struct super_block *sb) iput(iput_inode); } +void fsnotify_sb_delete(struct super_block *sb) +{ + fsnotify_unmount_inodes(sb); + fsnotify_clear_marks_by_sb(sb); +} + /* * Given an inode, first check if we care what happens to our children. Inotify * and dnotify both tell their parents about events. If we care about any event diff --git a/fs/notify/fsnotify.h b/fs/notify/fsnotify.h index 7902653dd577..5a00121fb219 100644 --- a/fs/notify/fsnotify.h +++ b/fs/notify/fsnotify.h @@ -21,6 +21,12 @@ static inline struct mount *fsnotify_conn_mount( return container_of(conn->obj, struct mount, mnt_fsnotify_marks); } +static inline struct super_block *fsnotify_conn_sb( + struct fsnotify_mark_connector *conn) +{ + return container_of(conn->obj, struct super_block, s_fsnotify_marks); +} + /* destroy all events sitting in this groups notification queue */ extern void fsnotify_flush_notify(struct fsnotify_group *group); @@ -43,6 +49,11 @@ static inline void fsnotify_clear_marks_by_mount(struct vfsmount *mnt) { fsnotify_destroy_marks(&real_mount(mnt)->mnt_fsnotify_marks); } +/* run the list of all marks associated with sb and destroy them */ +static inline void fsnotify_clear_marks_by_sb(struct super_block *sb) +{ + fsnotify_destroy_marks(&sb->s_fsnotify_marks); +} /* Wait until all marks queued for destruction are destroyed */ extern void fsnotify_wait_marks_destroyed(void); diff --git a/fs/notify/mark.c b/fs/notify/mark.c index 59cdb27826de..b5172ccb2e60 100644 --- a/fs/notify/mark.c +++ b/fs/notify/mark.c @@ -115,6 +115,8 @@ static __u32 *fsnotify_conn_mask_p(struct fsnotify_mark_connector *conn) return &fsnotify_conn_inode(conn)->i_fsnotify_mask; else if (conn->type == FSNOTIFY_OBJ_TYPE_VFSMOUNT) return &fsnotify_conn_mount(conn)->mnt_fsnotify_mask; + else if (conn->type == FSNOTIFY_OBJ_TYPE_SB) + return &fsnotify_conn_sb(conn)->s_fsnotify_mask; return NULL; } @@ -192,6 +194,8 @@ static struct inode *fsnotify_detach_connector_from_object( inode->i_fsnotify_mask = 0; } else if (conn->type == FSNOTIFY_OBJ_TYPE_VFSMOUNT) { fsnotify_conn_mount(conn)->mnt_fsnotify_mask = 0; + } else if (conn->type == FSNOTIFY_OBJ_TYPE_SB) { + fsnotify_conn_sb(conn)->s_fsnotify_mask = 0; } rcu_assign_pointer(*(conn->obj), NULL); diff --git a/fs/super.c b/fs/super.c index f3a8c008e164..ca53a08497ed 100644 --- a/fs/super.c +++ b/fs/super.c @@ -442,7 +442,7 @@ void generic_shutdown_super(struct super_block *sb) sync_filesystem(sb); sb->s_flags &= ~SB_ACTIVE; - fsnotify_unmount_inodes(sb); + fsnotify_sb_delete(sb); cgroup_writeback_umount(); evict_inodes(sb); diff --git a/include/linux/fs.h b/include/linux/fs.h index 33322702c910..2c14801d0aa3 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1464,6 +1464,11 @@ struct super_block { spinlock_t s_inode_wblist_lock; struct list_head s_inodes_wb; /* writeback inodes */ + +#ifdef CONFIG_FSNOTIFY + __u32 s_fsnotify_mask; + struct fsnotify_mark_connector __rcu *s_fsnotify_marks; +#endif } __randomize_layout; /* Helper functions so that in most cases filesystems will diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h index b8f4182f42f1..81b88fc9df31 100644 --- a/include/linux/fsnotify_backend.h +++ b/include/linux/fsnotify_backend.h @@ -206,12 +206,14 @@ struct fsnotify_group { enum fsnotify_obj_type { FSNOTIFY_OBJ_TYPE_INODE, FSNOTIFY_OBJ_TYPE_VFSMOUNT, + FSNOTIFY_OBJ_TYPE_SB, FSNOTIFY_OBJ_TYPE_COUNT, FSNOTIFY_OBJ_TYPE_DETACHED = FSNOTIFY_OBJ_TYPE_COUNT }; #define FSNOTIFY_OBJ_TYPE_INODE_FL (1U << FSNOTIFY_OBJ_TYPE_INODE) #define FSNOTIFY_OBJ_TYPE_VFSMOUNT_FL (1U << FSNOTIFY_OBJ_TYPE_VFSMOUNT) +#define FSNOTIFY_OBJ_TYPE_SB_FL (1U << FSNOTIFY_OBJ_TYPE_SB) #define FSNOTIFY_OBJ_ALL_TYPES_MASK ((1U << FSNOTIFY_OBJ_TYPE_COUNT) - 1) static inline bool fsnotify_valid_obj_type(unsigned int type) @@ -255,6 +257,7 @@ static inline struct fsnotify_mark *fsnotify_iter_##name##_mark( \ FSNOTIFY_ITER_FUNCS(inode, INODE) FSNOTIFY_ITER_FUNCS(vfsmount, VFSMOUNT) +FSNOTIFY_ITER_FUNCS(sb, SB) #define fsnotify_foreach_obj_type(type) \ for (type = 0; type < FSNOTIFY_OBJ_TYPE_COUNT; type++) @@ -267,8 +270,8 @@ struct fsnotify_mark_connector; typedef struct fsnotify_mark_connector __rcu *fsnotify_connp_t; /* - * Inode / vfsmount point to this structure which tracks all marks attached to - * the inode / vfsmount. The reference to inode / vfsmount is held by this + * Inode/vfsmount/sb point to this structure which tracks all marks attached to + * the inode/vfsmount/sb. The reference to inode/vfsmount/sb is held by this * structure. We destroy this structure when there are no more marks attached * to it. The structure is protected by fsnotify_mark_srcu. */ @@ -335,6 +338,7 @@ extern int fsnotify(struct inode *to_tell, __u32 mask, const void *data, int dat extern int __fsnotify_parent(const struct path *path, struct dentry *dentry, __u32 mask); extern void __fsnotify_inode_delete(struct inode *inode); extern void __fsnotify_vfsmount_delete(struct vfsmount *mnt); +extern void fsnotify_sb_delete(struct super_block *sb); extern u32 fsnotify_get_cookie(void); static inline int fsnotify_inode_watches_children(struct inode *inode) @@ -455,9 +459,13 @@ static inline void fsnotify_clear_inode_marks_by_group(struct fsnotify_group *gr { fsnotify_clear_marks_by_group(group, FSNOTIFY_OBJ_TYPE_INODE_FL); } +/* run all the marks in a group, and clear all of the sn marks */ +static inline void fsnotify_clear_sb_marks_by_group(struct fsnotify_group *group) +{ + fsnotify_clear_marks_by_group(group, FSNOTIFY_OBJ_TYPE_SB_FL); +} extern void fsnotify_get_mark(struct fsnotify_mark *mark); extern void fsnotify_put_mark(struct fsnotify_mark *mark); -extern void fsnotify_unmount_inodes(struct super_block *sb); extern void fsnotify_finish_user_wait(struct fsnotify_iter_info *iter_info); extern bool fsnotify_prepare_user_wait(struct fsnotify_iter_info *iter_info); @@ -484,6 +492,9 @@ static inline void __fsnotify_inode_delete(struct inode *inode) static inline void __fsnotify_vfsmount_delete(struct vfsmount *mnt) {} +static inline void fsnotify_sb_delete(struct super_block *sb) +{} + static inline void fsnotify_update_flags(struct dentry *dentry) {} |