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| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-03-18 22:38:20 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-03-18 22:38:20 +0100 |
| commit | c592c761a36286ab83451daa37a21c8558ea99c0 (patch) | |
| tree | 8abf57708fabf2a915320e9515b1ae2730ebf499 /fs/quota/quota.c | |
| parent | Merge remote-tracking branch 'regulator/topic/drivers' into regulator-next (diff) | |
| parent | ARM i.MX 3ds debugboard: register a dummy regulator for the smsc911x device (diff) | |
| download | linux-c592c761a36286ab83451daa37a21c8558ea99c0.tar.xz linux-c592c761a36286ab83451daa37a21c8558ea99c0.zip | |
Merge remote-tracking branch 'regulator/topic/stub' into regulator-next
Diffstat (limited to 'fs/quota/quota.c')
| -rw-r--r-- | fs/quota/quota.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/fs/quota/quota.c b/fs/quota/quota.c index 7898cd688a00..fc2c4388d126 100644 --- a/fs/quota/quota.c +++ b/fs/quota/quota.c @@ -292,11 +292,26 @@ static int do_quotactl(struct super_block *sb, int type, int cmd, qid_t id, } } +/* Return 1 if 'cmd' will block on frozen filesystem */ +static int quotactl_cmd_write(int cmd) +{ + switch (cmd) { + case Q_GETFMT: + case Q_GETINFO: + case Q_SYNC: + case Q_XGETQSTAT: + case Q_XGETQUOTA: + case Q_XQUOTASYNC: + return 0; + } + return 1; +} + /* * look up a superblock on which quota ops will be performed * - use the name of a block device to find the superblock thereon */ -static struct super_block *quotactl_block(const char __user *special) +static struct super_block *quotactl_block(const char __user *special, int cmd) { #ifdef CONFIG_BLOCK struct block_device *bdev; @@ -309,7 +324,10 @@ static struct super_block *quotactl_block(const char __user *special) putname(tmp); if (IS_ERR(bdev)) return ERR_CAST(bdev); - sb = get_super(bdev); + if (quotactl_cmd_write(cmd)) + sb = get_super_thawed(bdev); + else + sb = get_super(bdev); bdput(bdev); if (!sb) return ERR_PTR(-ENODEV); @@ -361,7 +379,7 @@ SYSCALL_DEFINE4(quotactl, unsigned int, cmd, const char __user *, special, pathp = &path; } - sb = quotactl_block(special); + sb = quotactl_block(special, cmds); if (IS_ERR(sb)) { ret = PTR_ERR(sb); goto out; |