Subject: + fanotify-move-unrelated-handling-from-copy_event_to_user.patch added to -mm tree
To: jack@xxxxxxx,eparis@xxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Thu, 30 Jan 2014 14:01:35 -0800
The patch titled
Subject: fanotify: move unrelated handling from copy_event_to_user()
has been added to the -mm tree. Its filename is
fanotify-move-unrelated-handling-from-copy_event_to_user.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/fanotify-move-unrelated-handling-from-copy_event_to_user.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/fanotify-move-unrelated-handling-from-copy_event_to_user.patch
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------------------------------------------------------
From: Jan Kara <jack@xxxxxxx>
Subject: fanotify: move unrelated handling from copy_event_to_user()
Move code moving event structure to access_list from copy_event_to_user()
to fanotify_read() where it is more logical (so that we can immediately
see in the main loop that we either move the event to a different list or
free it). Also move special error handling for permission events from
copy_event_to_user() to the main loop to have it in one place with error
handling for normal events. This makes copy_event_to_user() really only
copy the event to user without any side effects.
Signed-off-by: Jan Kara <jack@xxxxxxx>
Cc: Eric Paris <eparis@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/notify/fanotify/fanotify_user.c | 35 +++++++++++++--------------
1 file changed, 18 insertions(+), 17 deletions(-)
diff -puN fs/notify/fanotify/fanotify_user.c~fanotify-move-unrelated-handling-from-copy_event_to_user fs/notify/fanotify/fanotify_user.c
--- a/fs/notify/fanotify/fanotify_user.c~fanotify-move-unrelated-handling-from-copy_event_to_user
+++ a/fs/notify/fanotify/fanotify_user.c
@@ -199,7 +199,7 @@ static ssize_t copy_event_to_user(struct
ret = fill_event_metadata(group, &fanotify_event_metadata, event, &f);
if (ret < 0)
- goto out;
+ return ret;
fd = fanotify_event_metadata.fd;
ret = -EFAULT;
@@ -208,13 +208,8 @@ static ssize_t copy_event_to_user(struct
goto out_close_fd;
#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
- if (event->mask & FAN_ALL_PERM_EVENTS) {
+ if (event->mask & FAN_ALL_PERM_EVENTS)
FANOTIFY_PE(event)->fd = fd;
- spin_lock(&group->fanotify_data.access_lock);
- list_add_tail(&event->fae.fse.list,
- &group->fanotify_data.access_list);
- spin_unlock(&group->fanotify_data.access_lock);
- }
#endif
if (fd != FAN_NOFD)
@@ -226,13 +221,6 @@ out_close_fd:
put_unused_fd(fd);
fput(f);
}
-out:
-#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
- if (event->mask & FAN_ALL_PERM_EVENTS) {
- FANOTIFY_PE(event)->response = FAN_DENY;
- wake_up(&group->fanotify_data.access_waitq);
- }
-#endif
return ret;
}
@@ -297,10 +285,23 @@ static ssize_t fanotify_read(struct file
* Permission events get queued to wait for response. Other
* events can be destroyed now.
*/
- if (!(kevent->mask & FAN_ALL_PERM_EVENTS))
+ if (!(kevent->mask & FAN_ALL_PERM_EVENTS)) {
fsnotify_destroy_event(group, kevent);
- if (ret < 0)
- break;
+ if (ret < 0)
+ break;
+ } else {
+#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
+ if (ret < 0) {
+ FANOTIFY_PE(kevent)->response = FAN_DENY;
+ wake_up(&group->fanotify_data.access_waitq);
+ break;
+ }
+ spin_lock(&group->fanotify_data.access_lock);
+ list_add_tail(&kevent->list,
+ &group->fanotify_data.access_list);
+ spin_unlock(&group->fanotify_data.access_lock);
+#endif
+ }
buf += ret;
count -= ret;
}
_
Patches currently in -mm which might be from jack@xxxxxxx are
origin.patch
fanotify-remove-useless-bypass_perm-check.patch
fanotify-use-fanotify-event-structure-for-permission-response-processing.patch
fanotify-remove-useless-test-from-event-initialization.patch
fanotify-convert-access_mutex-to-spinlock.patch
fanotify-reorganize-loop-in-fanotify_read.patch
fanotify-move-unrelated-handling-from-copy_event_to_user.patch
linux-next.patch
kernel-use-lockless-list-for-smp_call_function_single.patch
mm-add-strictlimit-knob-v2.patch
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