Expose a new type of fsnotify event for filesystems to report errors for
userspace monitoring tools. fanotify will send this type of
notification for FAN_ERROR marks.
Signed-off-by: Gabriel Krisman Bertazi <krisman@xxxxxxxxxxxxx>
---
fs/notify/fsnotify.c | 2 +-
include/linux/fsnotify_backend.h | 16 ++++++++++++++++
2 files changed, 17 insertions(+), 1 deletion(-)
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index 30d422b8c0fc..9fff35e67b37 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -558,7 +558,7 @@ static __init int fsnotify_init(void)
{
int ret;
- BUILD_BUG_ON(HWEIGHT32(ALL_FSNOTIFY_BITS) != 25);
+ BUILD_BUG_ON(HWEIGHT32(ALL_FSNOTIFY_BITS) != 26);
ret = init_srcu_struct(&fsnotify_mark_srcu);
if (ret)
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index a1a4dd69e5ed..f850bfbe30d4 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -48,6 +48,8 @@
#define FS_ACCESS_PERM 0x00020000 /* access event in a permissions hook */
#define FS_OPEN_EXEC_PERM 0x00040000 /* open/exec event in a permission hook */
+#define FS_ERROR 0x00100000 /* Used for filesystem error reporting */
+
#define FS_EXCL_UNLINK 0x04000000 /* do not send events if object is unlinked */
/*
* Set on inode mark that cares about things that happen to its children.
@@ -74,6 +76,8 @@
#define ALL_FSNOTIFY_PERM_EVENTS (FS_OPEN_PERM | FS_ACCESS_PERM | \
FS_OPEN_EXEC_PERM)
+#define ALL_FSNOTIFY_ERROR_EVENTS FS_ERROR
+
#define FSN_SUBMISSION_RING_BUFFER 0x00000080
/*
@@ -95,6 +99,7 @@
/* Events that can be reported to backends */
#define ALL_FSNOTIFY_EVENTS (ALL_FSNOTIFY_DIRENT_EVENTS | \
+ ALL_FSNOTIFY_ERROR_EVENTS | \
FS_EVENTS_POSS_ON_CHILD | \
FS_DELETE_SELF | FS_MOVE_SELF | FS_DN_RENAME | \
FS_UNMOUNT | FS_Q_OVERFLOW | FS_IN_IGNORED)
@@ -272,6 +277,17 @@ enum fsnotify_data_type {
FSNOTIFY_EVENT_NONE,
FSNOTIFY_EVENT_PATH,
FSNOTIFY_EVENT_INODE,
+ FSNOTIFY_EVENT_ERROR,
+};
+
+struct fs_error_report {
+ int error;
+
+ int line;
+ const char *function;
+
+ size_t fs_data_size;
+ void *fs_data;
};
static inline struct inode *fsnotify_data_inode(const void *data, int data_type)
--
2.31.0
