ocfs2: fix some small problems

First, move setting fe_done = 1 in spin lock, avoid bring any potential
race condition.

Second, tune mlog message level from ERROR to NOTICE, since the message
should not belong to error message.

Third, tune errno to -EAGAIN when file check queue is full, this errno
is more appropriate in the case.

Link: http://lkml.kernel.org/r/1495611866-27360-3-git-send-email-ghe@suse.com
Signed-off-by: Gang He <ghe@suse.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <jiangqi903@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/ocfs2/filecheck.c b/fs/ocfs2/filecheck.c
index 68f6c35..6014ebd 100644 (file)
--- a/fs/ocfs2/filecheck.c
+++ b/fs/ocfs2/filecheck.c
@@ -283,7 +283,7 @@ ocfs2_filecheck_adjust_max(struct ocfs2_filecheck_sysfs_entry *ent,
 
        spin_lock(&ent->fs_fcheck->fc_lock);
        if (len < (ent->fs_fcheck->fc_size - ent->fs_fcheck->fc_done)) {
-               mlog(ML_ERROR,
+               mlog(ML_NOTICE,
                "Cannot set online file check maximum entry number "
                "to %u due to too many pending entries(%u)\n",
                len, ent->fs_fcheck->fc_size - ent->fs_fcheck->fc_done);
@@ -457,8 +457,8 @@ static void
 ocfs2_filecheck_done_entry(struct ocfs2_filecheck_sysfs_entry *ent,
                           struct ocfs2_filecheck_entry *entry)
 {
-       entry->fe_done = 1;
        spin_lock(&ent->fs_fcheck->fc_lock);
+       entry->fe_done = 1;
        ent->fs_fcheck->fc_done++;
        spin_unlock(&ent->fs_fcheck->fc_lock);
 }
@@ -540,11 +540,11 @@ static ssize_t ocfs2_filecheck_store(struct kobject *kobj,
        spin_lock(&ent->fs_fcheck->fc_lock);
        if ((ent->fs_fcheck->fc_size >= ent->fs_fcheck->fc_max) &&
            (ent->fs_fcheck->fc_done == 0)) {
-               mlog(ML_ERROR,
+               mlog(ML_NOTICE,
                "Cannot do more file check "
                "since file check queue(%u) is full now\n",
                ent->fs_fcheck->fc_max);
-               ret = -EBUSY;
+               ret = -EAGAIN;
                kfree(entry);
        } else {
                if ((ent->fs_fcheck->fc_size >= ent->fs_fcheck->fc_max) &&