Commit b5a71748 authored by Pavel Emelyanov's avatar Pavel Emelyanov Committed by Linus Torvalds

bsdacct: turn acct off for all pidns-s on umount time

All the bsd_acct_strcts with opened accounting are linked into a global
list.  So, the acct_auto_close(_mnt) walks one and drops the accounting
for each.
Signed-off-by: default avatarPavel Emelyanov <xemul@openvz.org>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 0b6b030f
......@@ -89,9 +89,11 @@ struct bsd_acct_struct {
struct file *file;
struct pid_namespace *ns;
struct timer_list timer;
struct list_head list;
};
static DEFINE_SPINLOCK(acct_lock);
static LIST_HEAD(acct_list);
/*
* Called whenever the timer says to check the free space.
......@@ -188,12 +190,14 @@ static void acct_file_reopen(struct bsd_acct_struct *acct, struct file *file,
acct->needcheck = 0;
acct->file = NULL;
acct->ns = NULL;
list_del(&acct->list);
}
if (file) {
acct->file = file;
acct->ns = ns;
acct->needcheck = 0;
acct->active = 1;
list_add(&acct->list, &acct_list);
/* It's been deleted if it was used before so this is safe */
setup_timer(&acct->timer, acct_timeout, (unsigned long)acct);
acct->timer.expires = jiffies + ACCT_TIMEOUT*HZ;
......@@ -314,13 +318,13 @@ void acct_auto_close_mnt(struct vfsmount *m)
{
struct bsd_acct_struct *acct;
acct = init_pid_ns.bacct;
if (acct == NULL)
return;
spin_lock(&acct_lock);
if (acct->file && acct->file->f_path.mnt == m)
restart:
list_for_each_entry(acct, &acct_list, list)
if (acct->file && acct->file->f_path.mnt == m) {
acct_file_reopen(acct, NULL, NULL);
goto restart;
}
spin_unlock(&acct_lock);
}
......@@ -335,13 +339,13 @@ void acct_auto_close(struct super_block *sb)
{
struct bsd_acct_struct *acct;
acct = init_pid_ns.bacct;
if (acct == NULL)
return;
spin_lock(&acct_lock);
if (acct->file && acct->file->f_path.mnt->mnt_sb == sb)
restart:
list_for_each_entry(acct, &acct_list, list)
if (acct->file && acct->file->f_path.mnt->mnt_sb == sb) {
acct_file_reopen(acct, NULL, NULL);
goto restart;
}
spin_unlock(&acct_lock);
}
......
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