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-rw-r--r--fs/notify/fanotify/fanotify.c6
-rw-r--r--fs/notify/fsnotify.c18
-rw-r--r--fs/notify/mark.c4
-rw-r--r--include/linux/fsnotify_backend.h41
4 files changed, 42 insertions, 27 deletions
diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c
index b6091775aa6e..652fe84cb8ac 100644
--- a/fs/notify/fanotify/fanotify.c
+++ b/fs/notify/fanotify/fanotify.c
@@ -299,7 +299,7 @@ static u32 fanotify_group_event_mask(struct fsnotify_group *group,
return 0;
}
- fsnotify_foreach_obj_type(type) {
+ fsnotify_foreach_iter_type(type) {
if (!fsnotify_iter_should_report_type(iter_info, type))
continue;
mark = iter_info->marks[type];
@@ -318,7 +318,7 @@ static u32 fanotify_group_event_mask(struct fsnotify_group *group,
* If the event is on a child and this mark is on a parent not
* watching children, don't send it!
*/
- if (type == FSNOTIFY_OBJ_TYPE_PARENT &&
+ if (type == FSNOTIFY_ITER_TYPE_PARENT &&
!(mark->mask & FS_EVENT_ON_CHILD))
continue;
@@ -746,7 +746,7 @@ static __kernel_fsid_t fanotify_get_fsid(struct fsnotify_iter_info *iter_info)
int type;
__kernel_fsid_t fsid = {};
- fsnotify_foreach_obj_type(type) {
+ fsnotify_foreach_iter_type(type) {
struct fsnotify_mark_connector *conn;
if (!fsnotify_iter_should_report_type(iter_info, type))
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index 4034ca566f95..0c94457c625e 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -330,7 +330,7 @@ static int send_to_group(__u32 mask, const void *data, int data_type,
/* clear ignored on inode modification */
if (mask & FS_MODIFY) {
- fsnotify_foreach_obj_type(type) {
+ fsnotify_foreach_iter_type(type) {
if (!fsnotify_iter_should_report_type(iter_info, type))
continue;
mark = iter_info->marks[type];
@@ -340,7 +340,7 @@ static int send_to_group(__u32 mask, const void *data, int data_type,
}
}
- fsnotify_foreach_obj_type(type) {
+ fsnotify_foreach_iter_type(type) {
if (!fsnotify_iter_should_report_type(iter_info, type))
continue;
mark = iter_info->marks[type];
@@ -405,7 +405,7 @@ static unsigned int fsnotify_iter_select_report_types(
int type;
/* Choose max prio group among groups of all queue heads */
- fsnotify_foreach_obj_type(type) {
+ fsnotify_foreach_iter_type(type) {
mark = iter_info->marks[type];
if (mark &&
fsnotify_compare_groups(max_prio_group, mark->group) > 0)
@@ -417,7 +417,7 @@ static unsigned int fsnotify_iter_select_report_types(
/* Set the report mask for marks from same group as max prio group */
iter_info->report_mask = 0;
- fsnotify_foreach_obj_type(type) {
+ fsnotify_foreach_iter_type(type) {
mark = iter_info->marks[type];
if (mark &&
fsnotify_compare_groups(max_prio_group, mark->group) == 0)
@@ -435,7 +435,7 @@ static void fsnotify_iter_next(struct fsnotify_iter_info *iter_info)
{
int type;
- fsnotify_foreach_obj_type(type) {
+ fsnotify_foreach_iter_type(type) {
if (fsnotify_iter_should_report_type(iter_info, type))
iter_info->marks[type] =
fsnotify_next_mark(iter_info->marks[type]);
@@ -519,18 +519,18 @@ int fsnotify(__u32 mask, const void *data, int data_type, struct inode *dir,
iter_info.srcu_idx = srcu_read_lock(&fsnotify_mark_srcu);
- iter_info.marks[FSNOTIFY_OBJ_TYPE_SB] =
+ iter_info.marks[FSNOTIFY_ITER_TYPE_SB] =
fsnotify_first_mark(&sb->s_fsnotify_marks);
if (mnt) {
- iter_info.marks[FSNOTIFY_OBJ_TYPE_VFSMOUNT] =
+ iter_info.marks[FSNOTIFY_ITER_TYPE_VFSMOUNT] =
fsnotify_first_mark(&mnt->mnt_fsnotify_marks);
}
if (inode) {
- iter_info.marks[FSNOTIFY_OBJ_TYPE_INODE] =
+ iter_info.marks[FSNOTIFY_ITER_TYPE_INODE] =
fsnotify_first_mark(&inode->i_fsnotify_marks);
}
if (parent) {
- iter_info.marks[FSNOTIFY_OBJ_TYPE_PARENT] =
+ iter_info.marks[FSNOTIFY_ITER_TYPE_PARENT] =
fsnotify_first_mark(&parent->i_fsnotify_marks);
}
diff --git a/fs/notify/mark.c b/fs/notify/mark.c
index 52af2e9dadc0..9007d6affff3 100644
--- a/fs/notify/mark.c
+++ b/fs/notify/mark.c
@@ -353,7 +353,7 @@ bool fsnotify_prepare_user_wait(struct fsnotify_iter_info *iter_info)
{
int type;
- fsnotify_foreach_obj_type(type) {
+ fsnotify_foreach_iter_type(type) {
/* This can fail if mark is being removed */
if (!fsnotify_get_mark_safe(iter_info->marks[type])) {
__release(&fsnotify_mark_srcu);
@@ -382,7 +382,7 @@ void fsnotify_finish_user_wait(struct fsnotify_iter_info *iter_info)
int type;
iter_info->srcu_idx = srcu_read_lock(&fsnotify_mark_srcu);
- fsnotify_foreach_obj_type(type)
+ fsnotify_foreach_iter_type(type)
fsnotify_put_mark_wake(iter_info->marks[type]);
}
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index b9c84b1dbcc8..73739fee1710 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -337,10 +337,25 @@ static inline struct fs_error_report *fsnotify_data_error_report(
}
}
+/*
+ * Index to merged marks iterator array that correlates to a type of watch.
+ * The type of watched object can be deduced from the iterator type, but not
+ * the other way around, because an event can match different watched objects
+ * of the same object type.
+ * For example, both parent and child are watching an object of type inode.
+ */
+enum fsnotify_iter_type {
+ FSNOTIFY_ITER_TYPE_INODE,
+ FSNOTIFY_ITER_TYPE_VFSMOUNT,
+ FSNOTIFY_ITER_TYPE_SB,
+ FSNOTIFY_ITER_TYPE_PARENT,
+ FSNOTIFY_ITER_TYPE_COUNT
+};
+
+/* The type of object that a mark is attached to */
enum fsnotify_obj_type {
FSNOTIFY_OBJ_TYPE_ANY = -1,
FSNOTIFY_OBJ_TYPE_INODE,
- FSNOTIFY_OBJ_TYPE_PARENT,
FSNOTIFY_OBJ_TYPE_VFSMOUNT,
FSNOTIFY_OBJ_TYPE_SB,
FSNOTIFY_OBJ_TYPE_COUNT,
@@ -353,37 +368,37 @@ static inline bool fsnotify_valid_obj_type(unsigned int obj_type)
}
struct fsnotify_iter_info {
- struct fsnotify_mark *marks[FSNOTIFY_OBJ_TYPE_COUNT];
+ struct fsnotify_mark *marks[FSNOTIFY_ITER_TYPE_COUNT];
unsigned int report_mask;
int srcu_idx;
};
static inline bool fsnotify_iter_should_report_type(
- struct fsnotify_iter_info *iter_info, int type)
+ struct fsnotify_iter_info *iter_info, int iter_type)
{
- return (iter_info->report_mask & (1U << type));
+ return (iter_info->report_mask & (1U << iter_type));
}
static inline void fsnotify_iter_set_report_type(
- struct fsnotify_iter_info *iter_info, int type)
+ struct fsnotify_iter_info *iter_info, int iter_type)
{
- iter_info->report_mask |= (1U << type);
+ iter_info->report_mask |= (1U << iter_type);
}
static inline void fsnotify_iter_set_report_type_mark(
- struct fsnotify_iter_info *iter_info, int type,
+ struct fsnotify_iter_info *iter_info, int iter_type,
struct fsnotify_mark *mark)
{
- iter_info->marks[type] = mark;
- iter_info->report_mask |= (1U << type);
+ iter_info->marks[iter_type] = mark;
+ iter_info->report_mask |= (1U << iter_type);
}
#define FSNOTIFY_ITER_FUNCS(name, NAME) \
static inline struct fsnotify_mark *fsnotify_iter_##name##_mark( \
struct fsnotify_iter_info *iter_info) \
{ \
- return (iter_info->report_mask & (1U << FSNOTIFY_OBJ_TYPE_##NAME)) ? \
- iter_info->marks[FSNOTIFY_OBJ_TYPE_##NAME] : NULL; \
+ return (iter_info->report_mask & (1U << FSNOTIFY_ITER_TYPE_##NAME)) ? \
+ iter_info->marks[FSNOTIFY_ITER_TYPE_##NAME] : NULL; \
}
FSNOTIFY_ITER_FUNCS(inode, INODE)
@@ -391,8 +406,8 @@ FSNOTIFY_ITER_FUNCS(parent, PARENT)
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++)
+#define fsnotify_foreach_iter_type(type) \
+ for (type = 0; type < FSNOTIFY_ITER_TYPE_COUNT; type++)
/*
* fsnotify_connp_t is what we embed in objects which connector can be attached
generated by cgit v1.2.3 (git 2.39.0) at 2024-09-07 07:23:59 +0300