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Date: Tue, 23 Nov 2010 18:49:54 -0800
From: Joe Perches <joe@...ches.com>
To: Jan Kara <jack@...e.cz>
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH] quota: Use %pV and __attribute__((format (printf in
__quota_error and fix fallout
Use %pV in __quota_error so a single printk can not be
interleaved with other logging messages.
Add __attribute__((format (printf, 3, 4))) so format
and arguments can be verified by compiler.
Make sure printk formats and arguments match.
Block # needed a pointer dereference.
Signed-off-by: Joe Perches <joe@...ches.com>
---
fs/quota/dquot.c | 18 +++++++++++-------
fs/quota/quota_tree.c | 9 +++++----
include/linux/quotaops.h | 5 +++--
3 files changed, 19 insertions(+), 13 deletions(-)
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 0fed41e..84becd3 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -133,16 +133,20 @@ __cacheline_aligned_in_smp DEFINE_SPINLOCK(dq_data_lock);
EXPORT_SYMBOL(dq_data_lock);
void __quota_error(struct super_block *sb, const char *func,
- const char *fmt, ...)
+ const char *fmt, ...)
{
- va_list args;
-
if (printk_ratelimit()) {
+ va_list args;
+ struct va_format vaf;
+
va_start(args, fmt);
- printk(KERN_ERR "Quota error (device %s): %s: ",
- sb->s_id, func);
- vprintk(fmt, args);
- printk("\n");
+
+ vaf.fmt = fmt;
+ vaf.va = &args;
+
+ printk(KERN_ERR "Quota error (device %s): %s: %pV\n",
+ sb->s_id, func, &vaf);
+
va_end(args);
}
}
diff --git a/fs/quota/quota_tree.c b/fs/quota/quota_tree.c
index 9e48874..e41c1becf 100644
--- a/fs/quota/quota_tree.c
+++ b/fs/quota/quota_tree.c
@@ -468,8 +468,8 @@ static int remove_tree(struct qtree_mem_dqinfo *info, struct dquot *dquot,
return -ENOMEM;
ret = read_blk(info, *blk, buf);
if (ret < 0) {
- quota_error(dquot->dq_sb, "Can't read quota data "
- "block %u", blk);
+ quota_error(dquot->dq_sb, "Can't read quota data block %u",
+ *blk);
goto out_buf;
}
newblk = le32_to_cpu(ref[get_index(info, dquot->dq_id, depth)]);
@@ -493,8 +493,9 @@ static int remove_tree(struct qtree_mem_dqinfo *info, struct dquot *dquot,
} else {
ret = write_blk(info, *blk, buf);
if (ret < 0)
- quota_error(dquot->dq_sb, "Can't write quota "
- "tree block %u", blk);
+ quota_error(dquot->dq_sb,
+ "Can't write quota tree block %u",
+ *blk);
}
}
out_buf:
diff --git a/include/linux/quotaops.h b/include/linux/quotaops.h
index d1a9193..223b14c 100644
--- a/include/linux/quotaops.h
+++ b/include/linux/quotaops.h
@@ -31,8 +31,9 @@ static inline bool is_quota_modification(struct inode *inode, struct iattr *ia)
#define quota_error(sb, fmt, args...) \
__quota_error((sb), __func__, fmt , ## args)
-extern void __quota_error(struct super_block *sb, const char *func,
- const char *fmt, ...);
+extern __attribute__((format (printf, 3, 4)))
+void __quota_error(struct super_block *sb, const char *func,
+ const char *fmt, ...);
/*
* declaration of quota_function calls in kernel.
--
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