summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorAndreas Gruenbacher <agruen@suse.de>2009-12-17 21:24:27 -0500
committerEric Paris <eparis@redhat.com>2010-07-28 09:58:56 -0400
commit32c3263221bd63316815286dccacdc7abfd7f3c4 (patch)
tree9dad12d5b966cf42d7506e10fb2e3c8d955415d3
parent22aa425dec9e47051624714ae283eb2b6a473013 (diff)
fanotify: Add pids to events
Pass the process identifiers of the triggering processes to fanotify listeners: this information is useful for event filtering and logging. Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Signed-off-by: Eric Paris <eparis@redhat.com>
-rw-r--r--fs/notify/fanotify/fanotify.c5
-rw-r--r--fs/notify/fanotify/fanotify_user.c1
-rw-r--r--fs/notify/notification.c3
-rw-r--r--include/linux/fanotify.h1
-rw-r--r--include/linux/fsnotify_backend.h1
5 files changed, 9 insertions, 2 deletions
diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c
index 5b0b6b485a9..881067dc792 100644
--- a/fs/notify/fanotify/fanotify.c
+++ b/fs/notify/fanotify/fanotify.c
@@ -10,8 +10,9 @@ static bool should_merge(struct fsnotify_event *old, struct fsnotify_event *new)
{
pr_debug("%s: old=%p new=%p\n", __func__, old, new);
- if ((old->to_tell == new->to_tell) &&
- (old->data_type == new->data_type)) {
+ if (old->to_tell == new->to_tell &&
+ old->data_type == new->data_type &&
+ old->tgid == new->tgid) {
switch (old->data_type) {
case (FSNOTIFY_EVENT_PATH):
if ((old->path.mnt == new->path.mnt) &&
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index cf9c3000982..66e38fc052b 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -103,6 +103,7 @@ static ssize_t fill_event_metadata(struct fsnotify_group *group,
metadata->event_len = FAN_EVENT_METADATA_LEN;
metadata->vers = FANOTIFY_METADATA_VERSION;
metadata->mask = fanotify_outgoing_mask(event->mask);
+ metadata->pid = pid_vnr(event->tgid);
metadata->fd = create_fd(group, event);
return metadata->fd;
diff --git a/fs/notify/notification.c b/fs/notify/notification.c
index 066f1f988ba..7fc8d004084 100644
--- a/fs/notify/notification.c
+++ b/fs/notify/notification.c
@@ -93,6 +93,7 @@ void fsnotify_put_event(struct fsnotify_event *event)
BUG_ON(!list_empty(&event->private_data_list));
kfree(event->file_name);
+ put_pid(event->tgid);
kmem_cache_free(fsnotify_event_cachep, event);
}
}
@@ -346,6 +347,7 @@ struct fsnotify_event *fsnotify_clone_event(struct fsnotify_event *old_event)
return NULL;
}
}
+ event->tgid = get_pid(old_event->tgid);
if (event->data_type == FSNOTIFY_EVENT_PATH)
path_get(&event->path);
@@ -385,6 +387,7 @@ struct fsnotify_event *fsnotify_create_event(struct inode *to_tell, __u32 mask,
event->name_len = strlen(event->file_name);
}
+ event->tgid = get_pid(task_tgid(current));
event->sync_cookie = cookie;
event->to_tell = to_tell;
event->data_type = data_type;
diff --git a/include/linux/fanotify.h b/include/linux/fanotify.h
index c1c66162a46..5f633af4d1b 100644
--- a/include/linux/fanotify.h
+++ b/include/linux/fanotify.h
@@ -62,6 +62,7 @@ struct fanotify_event_metadata {
__u32 vers;
__s32 fd;
__u64 mask;
+ __s64 pid;
} __attribute__ ((packed));
/* Helper functions to deal with fanotify_event_metadata buffers */
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index ff654c1932f..7d93572ec56 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -221,6 +221,7 @@ struct fsnotify_event {
u32 sync_cookie; /* used to corrolate events, namely inotify mv events */
char *file_name;
size_t name_len;
+ struct pid *tgid;
struct list_head private_data_list; /* groups can store private data here */
};