diff options
Diffstat (limited to 'fs/quota/quota.c')
| -rw-r--r-- | fs/quota/quota.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/fs/quota/quota.c b/fs/quota/quota.c index 2d445425aad7..6ce6f4b6826b 100644 --- a/fs/quota/quota.c +++ b/fs/quota/quota.c @@ -789,9 +789,14 @@ static int quotactl_cmd_write(int cmd) } return 1; } - #endif /* CONFIG_BLOCK */ +/* Return true if quotactl command is manipulating quota on/off state */ +static bool quotactl_cmd_onoff(int cmd) +{ + return (cmd == Q_QUOTAON) || (cmd == Q_QUOTAOFF); +} + /* * look up a superblock on which quota ops will be performed * - use the name of a block device to find the superblock thereon @@ -809,7 +814,9 @@ static struct super_block *quotactl_block(const char __user *special, int cmd) putname(tmp); if (IS_ERR(bdev)) return ERR_CAST(bdev); - if (quotactl_cmd_write(cmd)) + if (quotactl_cmd_onoff(cmd)) + sb = get_super_exclusive_thawed(bdev); + else if (quotactl_cmd_write(cmd)) sb = get_super_thawed(bdev); else sb = get_super(bdev); @@ -872,7 +879,10 @@ SYSCALL_DEFINE4(quotactl, unsigned int, cmd, const char __user *, special, ret = do_quotactl(sb, type, cmds, id, addr, pathp); - drop_super(sb); + if (!quotactl_cmd_onoff(cmds)) + drop_super(sb); + else + drop_super_exclusive(sb); out: if (pathp && !IS_ERR(pathp)) path_put(pathp); |