On Mon, Apr 16, 2012 at 02:25:30PM +0200, Jan Kara wrote:
>
>
> this patch series aims at fixing a regression in parsing of
> journalled quota mount options introduced by Ted's mount option
> parsing rewrite. Patches 1 and 2 cleanup the code a bit and patch 3
> then fixes the regression. Patch 4 is a tiny cleanup.
Hi Jan,
Apologies for breaking the journalled mount options, and thank you for
this patch series. I agree it's an improvement on what we currently
have. My main concern with though, is I'd like to fix this for 3.4,
and the four patches together is a bit larger than what I feel
comfortable pushing to Linus at this point. What do you think of this
patch now, and I'll we'll add your changes for the next merge window?
- Ted
>From 816c710aa92cdf442e6fc722b74bb99bf8575a30 Mon Sep 17 00:00:00 2001
From: Theodore Ts'o <tytso@xxxxxxx>
Date: Mon, 16 Apr 2012 12:54:07 -0400
Subject: [PATCH] ext4: fix handling of journalled quota options
Commit 26092bf5 broke handling of journalled quota mount options by
trying to parse argument of every mount option as a number. Fix this
by dealing with the quota options before we call match_int().
Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx>
Cc: Jan Kara <jack@xxxxxxx>
---
fs/ext4/super.c | 32 +++++++++++++++-----------------
1 file changed, 15 insertions(+), 17 deletions(-)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index ef7db50..6da1935 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1305,20 +1305,20 @@ static int set_qf_name(struct super_block *sb, int qtype, substring_t *args)
ext4_msg(sb, KERN_ERR,
"Cannot change journaled "
"quota options when quota turned on");
- return 0;
+ return -1;
}
qname = match_strdup(args);
if (!qname) {
ext4_msg(sb, KERN_ERR,
"Not enough memory for storing quotafile name");
- return 0;
+ return -1;
}
if (sbi->s_qf_names[qtype] &&
strcmp(sbi->s_qf_names[qtype], qname)) {
ext4_msg(sb, KERN_ERR,
"%s quota file already specified", QTYPE2NAME(qtype));
kfree(qname);
- return 0;
+ return -1;
}
sbi->s_qf_names[qtype] = qname;
if (strchr(sbi->s_qf_names[qtype], '/')) {
@@ -1326,7 +1326,7 @@ static int set_qf_name(struct super_block *sb, int qtype, substring_t *args)
"quotafile must be on filesystem root");
kfree(sbi->s_qf_names[qtype]);
sbi->s_qf_names[qtype] = NULL;
- return 0;
+ return -1;
}
set_opt(sb, QUOTA);
return 1;
@@ -1341,7 +1341,7 @@ static int clear_qf_name(struct super_block *sb, int qtype)
sbi->s_qf_names[qtype]) {
ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options"
" when quota turned on");
- return 0;
+ return -1;
}
/*
* The space will be released later when all options are confirmed
@@ -1450,6 +1450,16 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token,
const struct mount_opts *m;
int arg = 0;
+#ifdef CONFIG_QUOTA
+ if (token == Opt_usrjquota)
+ return set_qf_name(sb, USRQUOTA, &args[0]);
+ else if (token == Opt_grpjquota)
+ return set_qf_name(sb, GRPQUOTA, &args[0]);
+ else if (token == Opt_offusrjquota)
+ return clear_qf_name(sb, USRQUOTA);
+ else if (token == Opt_offgrpjquota)
+ return clear_qf_name(sb, GRPQUOTA);
+#endif
if (args->from && match_int(args, &arg))
return -1;
switch (token) {
@@ -1549,18 +1559,6 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token,
sbi->s_mount_opt |= m->mount_opt;
}
#ifdef CONFIG_QUOTA
- } else if (token == Opt_usrjquota) {
- if (!set_qf_name(sb, USRQUOTA, &args[0]))
- return -1;
- } else if (token == Opt_grpjquota) {
- if (!set_qf_name(sb, GRPQUOTA, &args[0]))
- return -1;
- } else if (token == Opt_offusrjquota) {
- if (!clear_qf_name(sb, USRQUOTA))
- return -1;
- } else if (token == Opt_offgrpjquota) {
- if (!clear_qf_name(sb, GRPQUOTA))
- return -1;
} else if (m->flags & MOPT_QFMT) {
if (sb_any_quota_loaded(sb) &&
sbi->s_jquota_fmt != m->mount_opt) {
--
1.7.10.rc3
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