Subject: + fanotify-reorganize-loop-in-fanotify_read.patch added to -mm tree
To: jack@xxxxxxx,eparis@xxxxxxxxxx,viro@xxxxxxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Tue, 04 Mar 2014 13:12:03 -0800
The patch titled
Subject: fanotify: reorganize loop in fanotify_read()
has been added to the -mm tree. Its filename is
fanotify-reorganize-loop-in-fanotify_read.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/fanotify-reorganize-loop-in-fanotify_read.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/fanotify-reorganize-loop-in-fanotify_read.patch
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------------------------------------------------------
From: Jan Kara <jack@xxxxxxx>
Subject: fanotify: reorganize loop in fanotify_read()
Swap the error / "read ok" branches in the main loop of fanotify_read().
We will grow the "read ok" part in the next patch and this makes the
indentation easier. Also it is more common to have error conditions
inside an 'if' instead of the fast path.
Signed-off-by: Jan Kara <jack@xxxxxxx>
Cc: Eric Paris <eparis@xxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/notify/fanotify/fanotify_user.c | 46 ++++++++++++++-------------
1 file changed, 24 insertions(+), 22 deletions(-)
diff -puN fs/notify/fanotify/fanotify_user.c~fanotify-reorganize-loop-in-fanotify_read fs/notify/fanotify/fanotify_user.c
--- a/fs/notify/fanotify/fanotify_user.c~fanotify-reorganize-loop-in-fanotify_read
+++ a/fs/notify/fanotify/fanotify_user.c
@@ -272,35 +272,37 @@ static ssize_t fanotify_read(struct file
kevent = get_one_event(group, count);
mutex_unlock(&group->notification_mutex);
- if (kevent) {
+ if (IS_ERR(kevent)) {
ret = PTR_ERR(kevent);
- if (IS_ERR(kevent))
+ break;
+ }
+
+ if (!kevent) {
+ ret = -EAGAIN;
+ if (file->f_flags & O_NONBLOCK)
+ break;
+
+ ret = -ERESTARTSYS;
+ if (signal_pending(current))
break;
- ret = copy_event_to_user(group, kevent, buf);
- /*
- * Permission events get queued to wait for response.
- * Other events can be destroyed now.
- */
- if (!(kevent->mask & FAN_ALL_PERM_EVENTS))
- fsnotify_destroy_event(group, kevent);
- if (ret < 0)
+
+ if (start != buf)
break;
- buf += ret;
- count -= ret;
+ schedule();
continue;
}
- ret = -EAGAIN;
- if (file->f_flags & O_NONBLOCK)
- break;
- ret = -ERESTARTSYS;
- if (signal_pending(current))
+ ret = copy_event_to_user(group, kevent, buf);
+ /*
+ * Permission events get queued to wait for response. Other
+ * events can be destroyed now.
+ */
+ if (!(kevent->mask & FAN_ALL_PERM_EVENTS))
+ fsnotify_destroy_event(group, kevent);
+ if (ret < 0)
break;
-
- if (start != buf)
- break;
-
- schedule();
+ buf += ret;
+ count -= ret;
}
finish_wait(&group->notification_waitq, &wait);
_
Patches currently in -mm which might be from jack@xxxxxxx are
ocfs2-fix-quota-file-corruption.patch
backing_dev-fix-hung-task-on-sync.patch
kthread-ensure-locality-of-task_struct-allocations.patch
fanotify-remove-useless-bypass_perm-check.patch
fanotify-use-fanotify-event-structure-for-permission-response-processing.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
ocfs2-remove-ocfs2_inode_skip_delete-flag.patch
ocfs2-move-dquot_initialize-in-ocfs2_delete_inode-somewhat-later.patch
quota-provide-function-to-grab-quota-structure-reference.patch
ocfs2-implement-delayed-dropping-of-last-dquot-reference.patch
ocfs2-avoid-blocking-in-ocfs2_mark_lockres_freeing-in-downconvert-thread.patch
ocfs2-revert-iput-deferring-code-in-ocfs2_drop_dentry_lock.patch
mm-vmstat-fix-up-zone-state-accounting.patch
fs-cachefiles-use-add_to_page_cache_lru.patch
lib-radix-tree-radix_tree_delete_item.patch
mm-shmem-save-one-radix-tree-lookup-when-truncating-swapped-pages.patch
mm-filemap-move-radix-tree-hole-searching-here.patch
mm-fs-prepare-for-non-page-entries-in-page-cache-radix-trees.patch
mm-fs-store-shadow-entries-in-page-cache.patch
mm-thrash-detection-based-file-cache-sizing.patch
lib-radix_tree-tree-node-interface.patch
mm-keep-page-cache-radix-tree-nodes-in-check.patch
mm-readaheadc-fix-readahead-failure-for-memoryless-numa-nodes-and-limit-readahead-pages.patch
printk-remove-duplicated-check-for-log-level.patch
printk-remove-obsolete-check-for-log-level-c.patch
printk-add-comment-about-tricky-check-for-text-buffer-size.patch
printk-use-also-the-last-bytes-in-the-ring-buffer.patch
printk-do-not-compute-the-size-of-the-message-twice.patch
linux-next.patch
mm-add-strictlimit-knob-v2.patch
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