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authorAl Viro <viro@zeniv.linux.org.uk>2014-08-07 15:35:19 +0400
committerAl Viro <viro@zeniv.linux.org.uk>2014-08-07 22:40:08 +0400
commit17c0a5aaffa63da6b5c73a31e36616bdcd12d143 (patch)
tree5dfe2d6eaf41ee01aad44eaad06766dc67c74545 /kernel/acct.c
parent0aec09d049d7e994eba54bad4376dd8f58eab797 (diff)
downloadlinux-17c0a5aaffa63da6b5c73a31e36616bdcd12d143.tar.xz
make acct_kill() wait for file closing.
Do actual closing of file via schedule_work(). And use __fput_sync() there. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/acct.c')
-rw-r--r--kernel/acct.c20
1 files changed, 17 insertions, 3 deletions
diff --git a/kernel/acct.c b/kernel/acct.c
index 6fd375f15626..d9ebc96b1126 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -92,6 +92,8 @@ struct bsd_acct_struct {
unsigned long needcheck;
struct file *file;
struct pid_namespace *ns;
+ struct work_struct work;
+ struct completion done;
};
static void acct_free_rcu(struct rcu_head *head)
@@ -176,15 +178,27 @@ again:
return res;
}
+static void close_work(struct work_struct *work)
+{
+ struct bsd_acct_struct *acct = container_of(work, struct bsd_acct_struct, work);
+ struct file *file = acct->file;
+ mnt_unpin(file->f_path.mnt);
+ if (file->f_op->flush)
+ file->f_op->flush(file, NULL);
+ __fput_sync(file);
+ complete(&acct->done);
+}
+
static void acct_kill(struct bsd_acct_struct *acct,
struct bsd_acct_struct *new)
{
if (acct) {
- struct file *file = acct->file;
struct pid_namespace *ns = acct->ns;
do_acct_process(acct);
- mnt_unpin(file->f_path.mnt);
- filp_close(file, NULL);
+ INIT_WORK(&acct->work, close_work);
+ init_completion(&acct->done);
+ schedule_work(&acct->work);
+ wait_for_completion(&acct->done);
spin_lock(&acct_lock);
hlist_del(&acct->m_list);
hlist_del(&acct->s_list);