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-rw-r--r--include/linux/Kbuild1
-rw-r--r--include/linux/dnotify.h1
-rw-r--r--include/linux/fanotify.h105
-rw-r--r--include/linux/fs.h16
-rw-r--r--include/linux/fsnotify.h161
-rw-r--r--include/linux/fsnotify_backend.h211
-rw-r--r--include/linux/inotify.h185
-rw-r--r--include/linux/mount.h6
-rw-r--r--include/linux/security.h1
-rw-r--r--include/linux/syscalls.h4
10 files changed, 352 insertions, 339 deletions
diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index 9aa9bcadf869..2547daf2aef2 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -210,6 +210,7 @@ unifdef-y += ethtool.h
unifdef-y += eventpoll.h
unifdef-y += signalfd.h
unifdef-y += ext2_fs.h
+unifdef-y += fanotify.h
unifdef-y += fb.h
unifdef-y += fcntl.h
unifdef-y += filter.h
diff --git a/include/linux/dnotify.h b/include/linux/dnotify.h
index ecc06286226d..3290555a52ee 100644
--- a/include/linux/dnotify.h
+++ b/include/linux/dnotify.h
@@ -28,6 +28,7 @@ struct dnotify_struct {
FS_CREATE | FS_DN_RENAME |\
FS_MOVED_FROM | FS_MOVED_TO)
+extern int dir_notify_enable;
extern void dnotify_flush(struct file *, fl_owner_t);
extern int fcntl_dirnotify(int, struct file *, unsigned long);
diff --git a/include/linux/fanotify.h b/include/linux/fanotify.h
new file mode 100644
index 000000000000..f0949a57ca9d
--- /dev/null
+++ b/include/linux/fanotify.h
@@ -0,0 +1,105 @@
+#ifndef _LINUX_FANOTIFY_H
+#define _LINUX_FANOTIFY_H
+
+#include <linux/types.h>
+
+/* the following events that user-space can register for */
+#define FAN_ACCESS 0x00000001 /* File was accessed */
+#define FAN_MODIFY 0x00000002 /* File was modified */
+#define FAN_CLOSE_WRITE 0x00000008 /* Unwrittable file closed */
+#define FAN_CLOSE_NOWRITE 0x00000010 /* Writtable file closed */
+#define FAN_OPEN 0x00000020 /* File was opened */
+
+#define FAN_EVENT_ON_CHILD 0x08000000 /* interested in child events */
+
+/* FIXME currently Q's have no limit.... */
+#define FAN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */
+
+#define FAN_OPEN_PERM 0x00010000 /* File open in perm check */
+#define FAN_ACCESS_PERM 0x00020000 /* File accessed in perm check */
+
+/* helper events */
+#define FAN_CLOSE (FAN_CLOSE_WRITE | FAN_CLOSE_NOWRITE) /* close */
+
+/* flags used for fanotify_init() */
+#define FAN_CLOEXEC 0x00000001
+#define FAN_NONBLOCK 0x00000002
+
+#define FAN_ALL_INIT_FLAGS (FAN_CLOEXEC | FAN_NONBLOCK)
+
+/* flags used for fanotify_modify_mark() */
+#define FAN_MARK_ADD 0x00000001
+#define FAN_MARK_REMOVE 0x00000002
+#define FAN_MARK_DONT_FOLLOW 0x00000004
+#define FAN_MARK_ONLYDIR 0x00000008
+#define FAN_MARK_MOUNT 0x00000010
+#define FAN_MARK_IGNORED_MASK 0x00000020
+#define FAN_MARK_IGNORED_SURV_MODIFY 0x00000040
+#define FAN_MARK_FLUSH 0x00000080
+
+#define FAN_ALL_MARK_FLAGS (FAN_MARK_ADD |\
+ FAN_MARK_REMOVE |\
+ FAN_MARK_DONT_FOLLOW |\
+ FAN_MARK_ONLYDIR |\
+ FAN_MARK_MOUNT |\
+ FAN_MARK_IGNORED_MASK |\
+ FAN_MARK_IGNORED_SURV_MODIFY)
+
+/*
+ * All of the events - we build the list by hand so that we can add flags in
+ * the future and not break backward compatibility. Apps will get only the
+ * events that they originally wanted. Be sure to add new events here!
+ */
+#define FAN_ALL_EVENTS (FAN_ACCESS |\
+ FAN_MODIFY |\
+ FAN_CLOSE |\
+ FAN_OPEN)
+
+/*
+ * All events which require a permission response from userspace
+ */
+#define FAN_ALL_PERM_EVENTS (FAN_OPEN_PERM |\
+ FAN_ACCESS_PERM)
+
+#define FAN_ALL_OUTGOING_EVENTS (FAN_ALL_EVENTS |\
+ FAN_ALL_PERM_EVENTS |\
+ FAN_Q_OVERFLOW)
+
+#define FANOTIFY_METADATA_VERSION 1
+
+struct fanotify_event_metadata {
+ __u32 event_len;
+ __u32 vers;
+ __s32 fd;
+ __u64 mask;
+ __s64 pid;
+} __attribute__ ((packed));
+
+struct fanotify_response {
+ __s32 fd;
+ __u32 response;
+} __attribute__ ((packed));
+
+/* Legit userspace responses to a _PERM event */
+#define FAN_ALLOW 0x01
+#define FAN_DENY 0x02
+
+/* Helper functions to deal with fanotify_event_metadata buffers */
+#define FAN_EVENT_METADATA_LEN (sizeof(struct fanotify_event_metadata))
+
+#define FAN_EVENT_NEXT(meta, len) ((len) -= (meta)->event_len, \
+ (struct fanotify_event_metadata*)(((char *)(meta)) + \
+ (meta)->event_len))
+
+#define FAN_EVENT_OK(meta, len) ((long)(len) >= (long)FAN_EVENT_METADATA_LEN && \
+ (long)(meta)->event_len >= (long)FAN_EVENT_METADATA_LEN && \
+ (long)(meta)->event_len <= (long)(len))
+
+#ifdef __KERNEL__
+
+struct fanotify_wait {
+ struct fsnotify_event *event;
+ __s32 fd;
+};
+#endif /* __KERNEL__ */
+#endif /* _LINUX_FANOTIFY_H */
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 9e221016a6a9..a8ccf85b8691 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -91,6 +91,9 @@ struct inodes_stat_t {
/* Expect random access pattern */
#define FMODE_RANDOM ((__force fmode_t)0x1000)
+/* File was opened by fanotify and shouldn't generate fanotify events */
+#define FMODE_NONOTIFY ((__force fmode_t)16777216) /* 0x1000000 */
+
/*
* The below are the various read and write types that we support. Some of
* them include behavioral modifiers that send information down to the
@@ -409,9 +412,6 @@ extern int get_max_files(void);
extern int sysctl_nr_open;
extern struct inodes_stat_t inodes_stat;
extern int leases_enable, lease_break_time;
-#ifdef CONFIG_DNOTIFY
-extern int dir_notify_enable;
-#endif
struct buffer_head;
typedef int (get_block_t)(struct inode *inode, sector_t iblock,
@@ -772,12 +772,7 @@ struct inode {
#ifdef CONFIG_FSNOTIFY
__u32 i_fsnotify_mask; /* all events this inode cares about */
- struct hlist_head i_fsnotify_mark_entries; /* fsnotify mark entries */
-#endif
-
-#ifdef CONFIG_INOTIFY
- struct list_head inotify_watches; /* watches on this inode */
- struct mutex inotify_mutex; /* protects the watches list */
+ struct hlist_head i_fsnotify_marks;
#endif
unsigned long i_state;
@@ -2484,7 +2479,8 @@ int proc_nr_files(struct ctl_table *table, int write,
int __init get_filesystem_list(char *buf);
#define ACC_MODE(x) ("\004\002\006\006"[(x)&O_ACCMODE])
-#define OPEN_FMODE(flag) ((__force fmode_t)((flag + 1) & O_ACCMODE))
+#define OPEN_FMODE(flag) ((__force fmode_t)(((flag + 1) & O_ACCMODE) | \
+ (flag & FMODE_NONOTIFY)))
#endif /* __KERNEL__ */
#endif /* _LINUX_FS_H */
diff --git a/include/linux/fsnotify.h b/include/linux/fsnotify.h
index 01755909ce81..e4e2204187ee 100644
--- a/include/linux/fsnotify.h
+++ b/include/linux/fsnotify.h
@@ -11,8 +11,6 @@
* (C) Copyright 2005 Robert Love
*/
-#include <linux/dnotify.h>
-#include <linux/inotify.h>
#include <linux/fsnotify_backend.h>
#include <linux/audit.h>
#include <linux/slab.h>
@@ -21,35 +19,52 @@
* fsnotify_d_instantiate - instantiate a dentry for inode
* Called with dcache_lock held.
*/
-static inline void fsnotify_d_instantiate(struct dentry *entry,
- struct inode *inode)
+static inline void fsnotify_d_instantiate(struct dentry *dentry,
+ struct inode *inode)
{
- __fsnotify_d_instantiate(entry, inode);
-
- inotify_d_instantiate(entry, inode);
+ __fsnotify_d_instantiate(dentry, inode);
}
/* Notify this dentry's parent about a child's events. */
-static inline void fsnotify_parent(struct dentry *dentry, __u32 mask)
+static inline void fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask)
{
- __fsnotify_parent(dentry, mask);
+ if (!dentry)
+ dentry = file->f_path.dentry;
+
+ __fsnotify_parent(file, dentry, mask);
+}
- inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
+/* simple call site for access decisions */
+static inline int fsnotify_perm(struct file *file, int mask)
+{
+ struct inode *inode = file->f_path.dentry->d_inode;
+ __u32 fsnotify_mask = 0;
+
+ if (file->f_mode & FMODE_NONOTIFY)
+ return 0;
+ if (!(mask & (MAY_READ | MAY_OPEN)))
+ return 0;
+ if (mask & MAY_OPEN)
+ fsnotify_mask = FS_OPEN_PERM;
+ else if (mask & MAY_READ)
+ fsnotify_mask = FS_ACCESS_PERM;
+ else
+ BUG();
+
+ return fsnotify(inode, fsnotify_mask, file, FSNOTIFY_EVENT_FILE, NULL, 0);
}
/*
- * fsnotify_d_move - entry has been moved
- * Called with dcache_lock and entry->d_lock held.
+ * fsnotify_d_move - dentry has been moved
+ * Called with dcache_lock and dentry->d_lock held.
*/
-static inline void fsnotify_d_move(struct dentry *entry)
+static inline void fsnotify_d_move(struct dentry *dentry)
{
/*
- * On move we need to update entry->d_flags to indicate if the new parent
- * cares about events from this entry.
+ * On move we need to update dentry->d_flags to indicate if the new parent
+ * cares about events from this dentry.
*/
- __fsnotify_update_dcache_flags(entry);
-
- inotify_d_move(entry);
+ __fsnotify_update_dcache_flags(dentry);
}
/*
@@ -57,8 +72,6 @@ static inline void fsnotify_d_move(struct dentry *entry)
*/
static inline void fsnotify_link_count(struct inode *inode)
{
- inotify_inode_queue_event(inode, IN_ATTRIB, 0, NULL, NULL);
-
fsnotify(inode, FS_ATTRIB, inode, FSNOTIFY_EVENT_INODE, NULL, 0);
}
@@ -66,45 +79,31 @@ static inline void fsnotify_link_count(struct inode *inode)
* fsnotify_move - file old_name at old_dir was moved to new_name at new_dir
*/
static inline void fsnotify_move(struct inode *old_dir, struct inode *new_dir,
- const char *old_name,
+ const unsigned char *old_name,
int isdir, struct inode *target, struct dentry *moved)
{
struct inode *source = moved->d_inode;
- u32 in_cookie = inotify_get_cookie();
u32 fs_cookie = fsnotify_get_cookie();
__u32 old_dir_mask = (FS_EVENT_ON_CHILD | FS_MOVED_FROM);
__u32 new_dir_mask = (FS_EVENT_ON_CHILD | FS_MOVED_TO);
- const char *new_name = moved->d_name.name;
+ const unsigned char *new_name = moved->d_name.name;
if (old_dir == new_dir)
old_dir_mask |= FS_DN_RENAME;
if (isdir) {
- isdir = IN_ISDIR;
old_dir_mask |= FS_IN_ISDIR;
new_dir_mask |= FS_IN_ISDIR;
}
- inotify_inode_queue_event(old_dir, IN_MOVED_FROM|isdir, in_cookie, old_name,
- source);
- inotify_inode_queue_event(new_dir, IN_MOVED_TO|isdir, in_cookie, new_name,
- source);
-
fsnotify(old_dir, old_dir_mask, old_dir, FSNOTIFY_EVENT_INODE, old_name, fs_cookie);
fsnotify(new_dir, new_dir_mask, new_dir, FSNOTIFY_EVENT_INODE, new_name, fs_cookie);
- if (target) {
- inotify_inode_queue_event(target, IN_DELETE_SELF, 0, NULL, NULL);
- inotify_inode_is_dead(target);
-
- /* this is really a link_count change not a removal */
+ if (target)
fsnotify_link_count(target);
- }
- if (source) {
- inotify_inode_queue_event(source, IN_MOVE_SELF, 0, NULL, NULL);
+ if (source)
fsnotify(source, FS_MOVE_SELF, moved->d_inode, FSNOTIFY_EVENT_INODE, NULL, 0);
- }
audit_inode_child(moved, new_dir);
}
@@ -117,6 +116,14 @@ static inline void fsnotify_inode_delete(struct inode *inode)
}
/*
+ * fsnotify_vfsmount_delete - a vfsmount is being destroyed, clean up is needed
+ */
+static inline void fsnotify_vfsmount_delete(struct vfsmount *mnt)
+{
+ __fsnotify_vfsmount_delete(mnt);
+}
+
+/*
* fsnotify_nameremove - a filename was removed from a directory
*/
static inline void fsnotify_nameremove(struct dentry *dentry, int isdir)
@@ -126,7 +133,7 @@ static inline void fsnotify_nameremove(struct dentry *dentry, int isdir)
if (isdir)
mask |= FS_IN_ISDIR;
- fsnotify_parent(dentry, mask);
+ fsnotify_parent(NULL, dentry, mask);
}
/*
@@ -134,9 +141,6 @@ static inline void fsnotify_nameremove(struct dentry *dentry, int isdir)
*/
static inline void fsnotify_inoderemove(struct inode *inode)
{
- inotify_inode_queue_event(inode, IN_DELETE_SELF, 0, NULL, NULL);
- inotify_inode_is_dead(inode);
-
fsnotify(inode, FS_DELETE_SELF, inode, FSNOTIFY_EVENT_INODE, NULL, 0);
__fsnotify_inode_delete(inode);
}
@@ -146,8 +150,6 @@ static inline void fsnotify_inoderemove(struct inode *inode)
*/
static inline void fsnotify_create(struct inode *inode, struct dentry *dentry)
{
- inotify_inode_queue_event(inode, IN_CREATE, 0, dentry->d_name.name,
- dentry->d_inode);
audit_inode_child(dentry, inode);
fsnotify(inode, FS_CREATE, dentry->d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name, 0);
@@ -160,8 +162,6 @@ static inline void fsnotify_create(struct inode *inode, struct dentry *dentry)
*/
static inline void fsnotify_link(struct inode *dir, struct inode *inode, struct dentry *new_dentry)
{
- inotify_inode_queue_event(dir, IN_CREATE, 0, new_dentry->d_name.name,
- inode);
fsnotify_link_count(inode);
audit_inode_child(new_dentry, dir);
@@ -176,7 +176,6 @@ static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry)
__u32 mask = (FS_CREATE | FS_IN_ISDIR);
struct inode *d_inode = dentry->d_inode;
- inotify_inode_queue_event(inode, mask, 0, dentry->d_name.name, d_inode);
audit_inode_child(dentry, inode);
fsnotify(inode, mask, d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name, 0);
@@ -185,52 +184,52 @@ static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry)
/*
* fsnotify_access - file was read
*/
-static inline void fsnotify_access(struct dentry *dentry)
+static inline void fsnotify_access(struct file *file)
{
- struct inode *inode = dentry->d_inode;
+ struct inode *inode = file->f_path.dentry->d_inode;
__u32 mask = FS_ACCESS;
if (S_ISDIR(inode->i_mode))
mask |= FS_IN_ISDIR;
- inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
-
- fsnotify_parent(dentry, mask);
- fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0);
+ if (!(file->f_mode & FMODE_NONOTIFY)) {
+ fsnotify_parent(file, NULL, mask);
+ fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE, NULL, 0);
+ }
}
/*
* fsnotify_modify - file was modified
*/
-static inline void fsnotify_modify(struct dentry *dentry)
+static inline void fsnotify_modify(struct file *file)
{
- struct inode *inode = dentry->d_inode;
+ struct inode *inode = file->f_path.dentry->d_inode;
__u32 mask = FS_MODIFY;
if (S_ISDIR(inode->i_mode))
mask |= FS_IN_ISDIR;
- inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
-
- fsnotify_parent(dentry, mask);
- fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0);
+ if (!(file->f_mode & FMODE_NONOTIFY)) {
+ fsnotify_parent(file, NULL, mask);
+ fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE, NULL, 0);
+ }
}
/*
* fsnotify_open - file was opened
*/
-static inline void fsnotify_open(struct dentry *dentry)
+static inline void fsnotify_open(struct file *file)
{
- struct inode *inode = dentry->d_inode;
+ struct inode *inode = file->f_path.dentry->d_inode;
__u32 mask = FS_OPEN;
if (S_ISDIR(inode->i_mode))
mask |= FS_IN_ISDIR;
- inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
-
- fsnotify_parent(dentry, mask);
- fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0);
+ if (!(file->f_mode & FMODE_NONOTIFY)) {
+ fsnotify_parent(file, NULL, mask);
+ fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE, NULL, 0);
+ }
}
/*
@@ -238,18 +237,17 @@ static inline void fsnotify_open(struct dentry *dentry)
*/
static inline void fsnotify_close(struct file *file)
{
- struct dentry *dentry = file->f_path.dentry;
- struct inode *inode = dentry->d_inode;
+ struct inode *inode = file->f_path.dentry->d_inode;
fmode_t mode = file->f_mode;
__u32 mask = (mode & FMODE_WRITE) ? FS_CLOSE_WRITE : FS_CLOSE_NOWRITE;
if (S_ISDIR(inode->i_mode))
mask |= FS_IN_ISDIR;
- inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
-
- fsnotify_parent(dentry, mask);
- fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE, NULL, 0);
+ if (!(file->f_mode & FMODE_NONOTIFY)) {
+ fsnotify_parent(file, NULL, mask);
+ fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE, NULL, 0);
+ }
}
/*
@@ -263,9 +261,7 @@ static inline void fsnotify_xattr(struct dentry *dentry)
if (S_ISDIR(inode->i_mode))
mask |= FS_IN_ISDIR;
- inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
-
- fsnotify_parent(dentry, mask);
+ fsnotify_parent(NULL, dentry, mask);
fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0);
}
@@ -299,19 +295,18 @@ static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid)
if (mask) {
if (S_ISDIR(inode->i_mode))
mask |= FS_IN_ISDIR;
- inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
- fsnotify_parent(dentry, mask);
+ fsnotify_parent(NULL, dentry, mask);
fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0);
}
}
-#if defined(CONFIG_INOTIFY) || defined(CONFIG_FSNOTIFY) /* notify helpers */
+#if defined(CONFIG_FSNOTIFY) /* notify helpers */
/*
* fsnotify_oldname_init - save off the old filename before we change it
*/
-static inline const char *fsnotify_oldname_init(const char *name)
+static inline const unsigned char *fsnotify_oldname_init(const unsigned char *name)
{
return kstrdup(name, GFP_KERNEL);
}
@@ -319,22 +314,22 @@ static inline const char *fsnotify_oldname_init(const char *name)
/*
* fsnotify_oldname_free - free the name we got from fsnotify_oldname_init
*/
-static inline void fsnotify_oldname_free(const char *old_name)
+static inline void fsnotify_oldname_free(const unsigned char *old_name)
{
kfree(old_name);
}
-#else /* CONFIG_INOTIFY || CONFIG_FSNOTIFY */
+#else /* CONFIG_FSNOTIFY */
-static inline const char *fsnotify_oldname_init(const char *name)
+static inline const char *fsnotify_oldname_init(const unsigned char *name)
{
return NULL;
}
-static inline void fsnotify_oldname_free(const char *old_name)
+static inline void fsnotify_oldname_free(const unsigned char *old_name)
{
}
-#endif /* ! CONFIG_INOTIFY */
+#endif /* CONFIG_FSNOTIFY */
#endif /* _LINUX_FS_NOTIFY_H */
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index 4d6f47b51189..9bbfd7204b04 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -41,6 +41,10 @@
#define FS_Q_OVERFLOW 0x00004000 /* Event queued overflowed */
#define FS_IN_IGNORED 0x00008000 /* last inotify event here */
+#define FS_OPEN_PERM 0x00010000 /* open event in an permission hook */
+#define FS_ACCESS_PERM 0x00020000 /* access event in a permissions hook */
+
+#define FS_EXCL_UNLINK 0x04000000 /* do not send events if object is unlinked */
#define FS_IN_ISDIR 0x40000000 /* event occurred against dir */
#define FS_IN_ONESHOT 0x80000000 /* only send event once */
@@ -58,13 +62,20 @@
FS_MOVED_FROM | FS_MOVED_TO | FS_CREATE |\
FS_DELETE)
-/* listeners that hard code group numbers near the top */
-#define DNOTIFY_GROUP_NUM UINT_MAX
-#define INOTIFY_GROUP_NUM (DNOTIFY_GROUP_NUM-1)
+#define FS_MOVE (FS_MOVED_FROM | FS_MOVED_TO)
+
+#define ALL_FSNOTIFY_EVENTS (FS_ACCESS | FS_MODIFY | FS_ATTRIB | \
+ FS_CLOSE_WRITE | FS_CLOSE_NOWRITE | FS_OPEN | \
+ FS_MOVED_FROM | FS_MOVED_TO | FS_CREATE | \
+ FS_DELETE | FS_DELETE_SELF | FS_MOVE_SELF | \
+ FS_UNMOUNT | FS_Q_OVERFLOW | FS_IN_IGNORED | \
+ FS_OPEN_PERM | FS_ACCESS_PERM | FS_EXCL_UNLINK | \
+ FS_IN_ISDIR | FS_IN_ONESHOT | FS_DN_RENAME | \
+ FS_DN_MULTISHOT | FS_EVENT_ON_CHILD)
struct fsnotify_group;
struct fsnotify_event;
-struct fsnotify_mark_entry;
+struct fsnotify_mark;
struct fsnotify_event_private_data;
/*
@@ -80,10 +91,16 @@ struct fsnotify_event_private_data;
* valid group and inode to use to clean up.
*/
struct fsnotify_ops {
- bool (*should_send_event)(struct fsnotify_group *group, struct inode *inode, __u32 mask);
- int (*handle_event)(struct fsnotify_group *group, struct fsnotify_event *event);
+ bool (*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);
+ int (*handle_event)(struct fsnotify_group *group,
+ struct fsnotify_mark *inode_mark,
+ struct fsnotify_mark *vfsmount_mark,
+ struct fsnotify_event *event);
void (*free_group_priv)(struct fsnotify_group *group);
- void (*freeing_mark)(struct fsnotify_mark_entry *entry, struct fsnotify_group *group);
+ void (*freeing_mark)(struct fsnotify_mark *mark, struct fsnotify_group *group);
void (*free_event_priv)(struct fsnotify_event_private_data *priv);
};
@@ -95,22 +112,6 @@ struct fsnotify_ops {
*/
struct fsnotify_group {
/*
- * global list of all groups receiving events from fsnotify.
- * anchored by fsnotify_groups and protected by either fsnotify_grp_mutex
- * or fsnotify_grp_srcu depending on write vs read.
- */
- struct list_head group_list;
-
- /*
- * Defines all of the event types in which this group is interested.
- * This mask is a bitwise OR of the FS_* events from above. Each time
- * this mask changes for a group (if it changes) the correct functions
- * must be called to update the global structures which indicate global
- * interest in event types.
- */
- __u32 mask;
-
- /*
* How the refcnt is used is up to each group. When the refcnt hits 0
* fsnotify will clean up all of the resources associated with this group.
* As an example, the dnotify group will always have a refcnt=1 and that
@@ -119,7 +120,6 @@ struct fsnotify_group {
* closed.
*/
atomic_t refcnt; /* things with interest in this group */
- unsigned int group_num; /* simply prevents accidental group collision */
const struct fsnotify_ops *ops; /* how this group handles things */
@@ -130,15 +130,12 @@ struct fsnotify_group {
unsigned int q_len; /* events on the queue */
unsigned int max_events; /* maximum events allowed on the list */
- /* stores all fastapth entries assoc with this group so they can be cleaned on unregister */
- spinlock_t mark_lock; /* protect mark_entries list */
- atomic_t num_marks; /* 1 for each mark entry and 1 for not being
+ /* stores all fastpath marks assoc with this group so they can be cleaned on unregister */
+ spinlock_t mark_lock; /* protect marks_list */
+ atomic_t num_marks; /* 1 for each mark and 1 for not being
* past the point of no return when freeing
* a group */
- struct list_head mark_entries; /* all inode mark entries for this group */
-
- /* prevents double list_del of group_list. protected by global fsnotify_grp_mutex */
- bool on_group_list;
+ struct list_head marks_list; /* all inode marks for this group */
/* groups can define private fields here or use the void *private */
union {
@@ -152,6 +149,17 @@ struct fsnotify_group {
struct user_struct *user;
} inotify_data;
#endif
+#ifdef CONFIG_FANOTIFY
+ struct fanotify_group_private_data {
+#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
+ /* allows a group to block waiting for a userspace response */
+ struct mutex access_mutex;
+ struct list_head access_list;
+ wait_queue_head_t access_waitq;
+#endif /* CONFIG_FANOTIFY_ACCESS_PERMISSIONS */
+ int f_flags;
+ } fanotify_data;
+#endif /* CONFIG_FANOTIFY */
};
};
@@ -195,35 +203,57 @@ struct fsnotify_event {
/* to_tell may ONLY be dereferenced during handle_event(). */
struct inode *to_tell; /* either the inode the event happened to or its parent */
/*
- * depending on the event type we should have either a path or inode
- * We hold a reference on path, but NOT on inode. Since we have the ref on
- * the path, it may be dereferenced at any point during this object's
+ * depending on the event type we should have either a file or inode
+ * We hold a reference on file, but NOT on inode. Since we have the ref on
+ * the file, it may be dereferenced at any point during this object's
* lifetime. That reference is dropped when this object's refcnt hits
- * 0. If this event contains an inode instead of a path, the inode may
+ * 0. If this event contains an inode instead of a file, the inode may
* ONLY be used during handle_event().
*/
union {
- struct path path;
+ struct file *file;
struct inode *inode;
};
/* when calling fsnotify tell it if the data is a path or inode */
#define FSNOTIFY_EVENT_NONE 0
-#define FSNOTIFY_EVENT_PATH 1
+#define FSNOTIFY_EVENT_FILE 1
#define FSNOTIFY_EVENT_INODE 2
-#define FSNOTIFY_EVENT_FILE 3
int data_type; /* which of the above union we have */
atomic_t refcnt; /* how many groups still are using/need to send this event */
__u32 mask; /* the type of access, bitwise OR for FS_* event types */
u32 sync_cookie; /* used to corrolate events, namely inotify mv events */
- char *file_name;
+ const unsigned char *file_name;
size_t name_len;
+ struct pid *tgid;
+
+#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
+ __u32 response; /* userspace answer to question */
+#endif /* CONFIG_FANOTIFY_ACCESS_PERMISSIONS */
struct list_head private_data_list; /* groups can store private data here */
};
/*
- * a mark is simply an entry attached to an in core inode which allows an
+ * Inode specific fields in an fsnotify_mark
+ */
+struct fsnotify_inode_mark {
+ struct inode *inode; /* inode this mark is associated with */
+ struct hlist_node i_list; /* list of marks by inode->i_fsnotify_marks */
+ struct list_head free_i_list; /* tmp list used when freeing this mark */
+};
+
+/*
+ * Mount point specific fields in an fsnotify_mark
+ */
+struct fsnotify_vfsmount_mark {
+ struct vfsmount *mnt; /* vfsmount this mark is associated with */
+ struct hlist_node m_list; /* list of marks by inode->i_fsnotify_marks */
+ struct list_head free_m_list; /* tmp list used when freeing this mark */
+};
+
+/*
+ * a mark is simply an object attached to an in core inode which allows an
* fsnotify listener to indicate they are either no longer interested in events
* of a type matching mask or only interested in those events.
*
@@ -232,19 +262,28 @@ struct fsnotify_event {
* (such as dnotify) will flush these when the open fd is closed and not at
* inode eviction or modification.
*/
-struct fsnotify_mark_entry {
- __u32 mask; /* mask this mark entry is for */
+struct fsnotify_mark {
+ __u32 mask; /* mask this mark is for */
/* we hold ref for each i_list and g_list. also one ref for each 'thing'
* in kernel that found and may be using this mark. */
atomic_t refcnt; /* active things looking at this mark */
- struct inode *inode; /* inode this entry is associated with */
- struct fsnotify_group *group; /* group this mark entry is for */
- struct hlist_node i_list; /* list of mark_entries by inode->i_fsnotify_mark_entries */
- struct list_head g_list; /* list of mark_entries by group->i_fsnotify_mark_entries */
- spinlock_t lock; /* protect group, inode, and killme */
- struct list_head free_i_list; /* tmp list used when freeing this mark */
+ struct fsnotify_group *group; /* group this mark is for */
+ struct list_head g_list; /* list of marks by group->i_fsnotify_marks */
+ spinlock_t lock; /* protect group and inode */
+ union {
+ struct fsnotify_inode_mark i;
+ struct fsnotify_vfsmount_mark m;
+ };
+ __u32 ignored_mask; /* events types to ignore */
struct list_head free_g_list; /* tmp list used when freeing this mark */
- void (*free_mark)(struct fsnotify_mark_entry *entry); /* called on final put+free */
+#define FSNOTIFY_MARK_FLAG_INODE 0x01
+#define FSNOTIFY_MARK_FLAG_VFSMOUNT 0x02
+#define FSNOTIFY_MARK_FLAG_OBJECT_PINNED 0x04
+#define FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY 0x08
+#define FSNOTIFY_MARK_FLAG_ALIVE 0x10
+ unsigned int flags; /* vfsmount or inode mark? */
+ struct list_head destroy_list;
+ void (*free_mark)(struct fsnotify_mark *mark); /* called on final put+free */
};
#ifdef CONFIG_FSNOTIFY
@@ -252,10 +291,11 @@ struct fsnotify_mark_entry {
/* called from the vfs helpers */
/* main fsnotify call to send events */
-extern void fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is,
- const char *name, u32 cookie);
-extern void __fsnotify_parent(struct dentry *dentry, __u32 mask);
+extern int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is,
+ const unsigned char *name, u32 cookie);
+extern void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask);
extern void __fsnotify_inode_delete(struct inode *inode);
+extern void __fsnotify_vfsmount_delete(struct vfsmount *mnt);
extern u32 fsnotify_get_cookie(void);
static inline int fsnotify_inode_watches_children(struct inode *inode)
@@ -304,15 +344,9 @@ static inline void __fsnotify_d_instantiate(struct dentry *dentry, struct inode
/* called from fsnotify listeners, such as fanotify or dnotify */
-/* must call when a group changes its ->mask */
-extern void fsnotify_recalc_global_mask(void);
/* get a reference to an existing or create a new group */
-extern struct fsnotify_group *fsnotify_obtain_group(unsigned int group_num,
- __u32 mask,
- const struct fsnotify_ops *ops);
-/* run all marks associated with this group and update group->mask */
-extern void fsnotify_recalc_group_mask(struct fsnotify_group *group);
-/* drop reference on a group from fsnotify_obtain_group */
+extern struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops);
+/* drop reference on a group from fsnotify_alloc_group */
extern void fsnotify_put_group(struct fsnotify_group *group);
/* take a reference to an event */
@@ -323,8 +357,11 @@ extern struct fsnotify_event_private_data *fsnotify_remove_priv_from_event(struc
struct fsnotify_event *event);
/* attach the event to the group notification queue */
-extern int fsnotify_add_notify_event(struct fsnotify_group *group, struct fsnotify_event *event,
- struct fsnotify_event_private_data *priv);
+extern struct fsnotify_event *fsnotify_add_notify_event(struct fsnotify_group *group,
+ struct fsnotify_event *event,
+ struct fsnotify_event_private_data *priv,
+ struct fsnotify_event *(*merge)(struct list_head *,
+ struct fsnotify_event *));
/* true if the group notification queue is empty */
extern bool fsnotify_notify_queue_is_empty(struct fsnotify_group *group);
/* return, but do not dequeue the first event on the notification queue */
@@ -334,38 +371,66 @@ extern struct fsnotify_event *fsnotify_remove_notify_event(struct fsnotify_group
/* functions used to manipulate the marks attached to inodes */
+/* run all marks associated with a vfsmount and update mnt->mnt_fsnotify_mask */
+extern void fsnotify_recalc_vfsmount_mask(struct vfsmount *mnt);
/* run all marks associated with an inode and update inode->i_fsnotify_mask */
extern void fsnotify_recalc_inode_mask(struct inode *inode);
-extern void fsnotify_init_mark(struct fsnotify_mark_entry *entry, void (*free_mark)(struct fsnotify_mark_entry *entry));
+extern void fsnotify_init_mark(struct fsnotify_mark *mark, void (*free_mark)(struct fsnotify_mark *mark));
/* find (and take a reference) to a mark associated with group and inode */
-extern struct fsnotify_mark_entry *fsnotify_find_mark_entry(struct fsnotify_group *group, struct inode *inode);
+extern struct fsnotify_mark *fsnotify_find_inode_mark(struct fsnotify_group *group, struct inode *inode);
+/* find (and take a reference) to a mark associated with group and vfsmount */
+extern struct fsnotify_mark *fsnotify_find_vfsmount_mark(struct fsnotify_group *group, struct vfsmount *mnt);
+/* copy the values from old into new */
+extern void fsnotify_duplicate_mark(struct fsnotify_mark *new, struct fsnotify_mark *old);
+/* set the ignored_mask of a mark */
+extern void fsnotify_set_mark_ignored_mask_locked(struct fsnotify_mark *mark, __u32 mask);
+/* set the mask of a mark (might pin the object into memory */
+extern void fsnotify_set_mark_mask_locked(struct fsnotify_mark *mark, __u32 mask);
/* attach the mark to both the group and the inode */
-extern int fsnotify_add_mark(struct fsnotify_mark_entry *entry, struct fsnotify_group *group, struct inode *inode);
+extern int fsnotify_add_mark(struct fsnotify_mark *mark, struct fsnotify_group *group,
+ struct inode *inode, struct vfsmount *mnt, int allow_dups);
/* given a mark, flag it to be freed when all references are dropped */
-extern void fsnotify_destroy_mark_by_entry(struct fsnotify_mark_entry *entry);
+extern void fsnotify_destroy_mark(struct fsnotify_mark *mark);
+/* run all the marks in a group, and clear all of the vfsmount marks */
+extern void fsnotify_clear_vfsmount_marks_by_group(struct fsnotify_group *group);
+/* run all the marks in a group, and clear all of the inode marks */
+extern void fsnotify_clear_inode_marks_by_group(struct fsnotify_group *group);
+/* run all the marks in a group, and clear all of the marks where mark->flags & flags is true*/
+extern void fsnotify_clear_marks_by_group_flags(struct fsnotify_group *group, unsigned int flags);
/* run all the marks in a group, and flag them to be freed */
extern void fsnotify_clear_marks_by_group(struct fsnotify_group *group);
-extern void fsnotify_get_mark(struct fsnotify_mark_entry *entry);
-extern void fsnotify_put_mark(struct fsnotify_mark_entry *entry);
+extern void fsnotify_get_mark(struct fsnotify_mark *mark);
+extern void fsnotify_put_mark(struct fsnotify_mark *mark);
extern void fsnotify_unmount_inodes(struct list_head *list);
/* put here because inotify does some weird stuff when destroying watches */
extern struct fsnotify_event *fsnotify_create_event(struct inode *to_tell, __u32 mask,
- void *data, int data_is, const char *name,
+ void *data, int data_is,
+ const unsigned char *name,
u32 cookie, gfp_t gfp);
+/* fanotify likes to change events after they are on lists... */
+extern struct fsnotify_event *fsnotify_clone_event(struct fsnotify_event *old_event);
+extern int fsnotify_replace_event(struct fsnotify_event_holder *old_holder,
+ struct fsnotify_event *new_event);
+
#else
-static inline void fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is,
- const char *name, u32 cookie)
-{}
+static inline int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is,
+ const unsigned char *name, u32 cookie)
+{
+ return 0;
+}
-static inline void __fsnotify_parent(struct dentry *dentry, __u32 mask)
+static inline void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask)
{}
static inline void __fsnotify_inode_delete(struct inode *inode)
{}
+static inline void __fsnotify_vfsmount_delete(struct vfsmount *mnt)
+{}
+
static inline void __fsnotify_update_dcache_flags(struct dentry *dentry)
{}
diff --git a/include/linux/inotify.h b/include/linux/inotify.h
index 37ea2894b3c0..d33041e2a42a 100644
--- a/include/linux/inotify.h
+++ b/include/linux/inotify.h
@@ -51,6 +51,7 @@ struct inotify_event {
/* special flags */
#define IN_ONLYDIR 0x01000000 /* only watch the path if it is a directory */
#define IN_DONT_FOLLOW 0x02000000 /* don't follow a sym link */
+#define IN_EXCL_UNLINK 0x04000000 /* exclude events on unlinked objects */
#define IN_MASK_ADD 0x20000000 /* add to the mask of an already existing watch */
#define IN_ISDIR 0x40000000 /* event occurred against dir */
#define IN_ONESHOT 0x80000000 /* only send event once */
@@ -70,177 +71,17 @@ struct inotify_event {
#define IN_NONBLOCK O_NONBLOCK
#ifdef __KERNEL__
-
-#include <linux/dcache.h>
-#include <linux/fs.h>
-
-/*
- * struct inotify_watch - represents a watch request on a specific inode
- *
- * h_list is protected by ih->mutex of the associated inotify_handle.
- * i_list, mask are protected by inode->inotify_mutex of the associated inode.
- * ih, inode, and wd are never written to once the watch is created.
- *
- * Callers must use the established inotify interfaces to access inotify_watch
- * contents. The content of this structure is private to the inotify
- * implementation.
- */
-struct inotify_watch {
- struct list_head h_list; /* entry in inotify_handle's list */
- struct list_head i_list; /* entry in inode's list */
- atomic_t count; /* reference count */
- struct inotify_handle *ih; /* associated inotify handle */
- struct inode *inode; /* associated inode */
- __s32 wd; /* watch descriptor */
- __u32 mask; /* event mask for this watch */
-};
-
-struct inotify_operations {
- void (*handle_event)(struct inotify_watch *, u32, u32, u32,
- const char *, struct inode *);
- void (*destroy_watch)(struct inotify_watch *);
-};
-
-#ifdef CONFIG_INOTIFY
-
-/* Kernel API for producing events */
-
-extern void inotify_d_instantiate(struct dentry *, struct inode *);
-extern void inotify_d_move(struct dentry *);
-extern void inotify_inode_queue_event(struct inode *, __u32, __u32,
- const char *, struct inode *);
-extern void inotify_dentry_parent_queue_event(struct dentry *, __u32, __u32,
- const char *);
-extern void inotify_unmount_inodes(struct list_head *);
-extern void inotify_inode_is_dead(struct inode *);
-extern u32 inotify_get_cookie(void);
-
-/* Kernel Consumer API */
-
-extern struct inotify_handle *inotify_init(const struct inotify_operations *);
-extern void inotify_init_watch(struct inotify_watch *);
-extern void inotify_destroy(struct inotify_handle *);
-extern __s32 inotify_find_watch(struct inotify_handle *, struct inode *,
- struct inotify_watch **);
-extern __s32 inotify_find_update_watch(struct inotify_handle *, struct inode *,
- u32);
-extern __s32 inotify_add_watch(struct inotify_handle *, struct inotify_watch *,
- struct inode *, __u32);
-extern __s32 inotify_clone_watch(struct inotify_watch *, struct inotify_watch *);
-extern void inotify_evict_watch(struct inotify_watch *);
-extern int inotify_rm_watch(struct inotify_handle *, struct inotify_watch *);
-extern int inotify_rm_wd(struct inotify_handle *, __u32);
-extern void inotify_remove_watch_locked(struct inotify_handle *,
- struct inotify_watch *);
-extern void get_inotify_watch(struct inotify_watch *);
-extern void put_inotify_watch(struct inotify_watch *);
-extern int pin_inotify_watch(struct inotify_watch *);
-extern void unpin_inotify_watch(struct inotify_watch *);
-
-#else
-
-static inline void inotify_d_instantiate(struct dentry *dentry,
- struct inode *inode)
-{
-}
-
-static inline void inotify_d_move(struct dentry *dentry)
-{
-}
-
-static inline void inotify_inode_queue_event(struct inode *inode,
- __u32 mask, __u32 cookie,
- const char *filename,
- struct inode *n_inode)
-{
-}
-
-static inline void inotify_dentry_parent_queue_event(struct dentry *dentry,
- __u32 mask, __u32 cookie,
- const char *filename)
-{
-}
-
-static inline void inotify_unmount_inodes(struct list_head *list)
-{
-}
-
-static inline void inotify_inode_is_dead(struct inode *inode)
-{
-}
-
-static inline u32 inotify_get_cookie(void)
-{
- return 0;
-}
-
-static inline struct inotify_handle *inotify_init(const struct inotify_operations *ops)
-{
- return ERR_PTR(-EOPNOTSUPP);
-}
-
-static inline void inotify_init_watch(struct inotify_watch *watch)
-{
-}
-
-static inline void inotify_destroy(struct inotify_handle *ih)
-{
-}
-
-static inline __s32 inotify_find_watch(struct inotify_handle *ih, struct inode *inode,
- struct inotify_watch **watchp)
-{
- return -EOPNOTSUPP;
-}
-
-static inline __s32 inotify_find_update_watch(struct inotify_handle *ih,
- struct inode *inode, u32 mask)
-{
- return -EOPNOTSUPP;
-}
-
-static inline __s32 inotify_add_watch(struct inotify_handle *ih,
- struct inotify_watch *watch,
- struct inode *inode, __u32 mask)
-{
- return -EOPNOTSUPP;
-}
-
-static inline int inotify_rm_watch(struct inotify_handle *ih,
- struct inotify_watch *watch)
-{
- return -EOPNOTSUPP;
-}
-
-static inline int inotify_rm_wd(struct inotify_handle *ih, __u32 wd)
-{
- return -EOPNOTSUPP;
-}
-
-static inline void inotify_remove_watch_locked(struct inotify_handle *ih,
- struct inotify_watch *watch)
-{
-}
-
-static inline void get_inotify_watch(struct inotify_watch *watch)
-{
-}
-
-static inline void put_inotify_watch(struct inotify_watch *watch)
-{
-}
-
-extern inline int pin_inotify_watch(struct inotify_watch *watch)
-{
- return 0;
-}
-
-extern inline void unpin_inotify_watch(struct inotify_watch *watch)
-{
-}
-
-#endif /* CONFIG_INOTIFY */
-
-#endif /* __KERNEL __ */
+#include <linux/sysctl.h>
+extern struct ctl_table inotify_table[]; /* for sysctl */
+
+#define ALL_INOTIFY_BITS (IN_ACCESS | IN_MODIFY | IN_ATTRIB | IN_CLOSE_WRITE | \
+ IN_CLOSE_NOWRITE | IN_OPEN | IN_MOVED_FROM | \
+ IN_MOVED_TO | IN_CREATE | IN_DELETE | \
+ IN_DELETE_SELF | IN_MOVE_SELF | IN_UNMOUNT | \
+ IN_Q_OVERFLOW | IN_IGNORED | IN_ONLYDIR | \
+ IN_DONT_FOLLOW | IN_EXCL_UNLINK | IN_MASK_ADD | \
+ IN_ISDIR | IN_ONESHOT)
+
+#endif
#endif /* _LINUX_INOTIFY_H */
diff --git a/include/linux/mount.h b/include/linux/mount.h
index 4bd05474d11d..907210bd9f9c 100644
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -56,7 +56,11 @@ struct vfsmount {
struct list_head mnt_mounts; /* list of children, anchored here */
struct list_head mnt_child; /* and going through their mnt_child */
int mnt_flags;
- /* 4 bytes hole on 64bits arches */
+ /* 4 bytes hole on 64bits arches without fsnotify */
+#ifdef CONFIG_FSNOTIFY
+ __u32 mnt_fsnotify_mask;
+ struct hlist_head mnt_fsnotify_marks;
+#endif
const char *mnt_devname; /* Name of device e.g. /dev/dsk/hda1 */
struct list_head mnt_list;
struct list_head mnt_expire; /* link in fs-specific expiry list */
diff --git a/include/linux/security.h b/include/linux/security.h
index 723a93df756a..5bcb395a49d4 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -23,6 +23,7 @@
#define __LINUX_SECURITY_H
#include <linux/fs.h>
+#include <linux/fsnotify.h>
#include <linux/binfmts.h>
#include <linux/signal.h>
#include <linux/resource.h>
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index a6bfd1367d2a..2ab198a1e38d 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -811,6 +811,10 @@ asmlinkage long sys_pselect6(int, fd_set __user *, fd_set __user *,
asmlinkage long sys_ppoll(struct pollfd __user *, unsigned int,
struct timespec __user *, const sigset_t __user *,
size_t);
+asmlinkage long sys_fanotify_init(unsigned int flags, unsigned int event_f_flags);
+asmlinkage long sys_fanotify_mark(int fanotify_fd, unsigned int flags,
+ u64 mask, int fd,
+ const char __user *pathname);
int kernel_execve(const char *filename, char *const argv[], char *const envp[]);