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@perches.com>
Signed-off-by: Jan Kara <jack@suse.cz>

diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 0fed41e..84becd3 100644 (file)
--- 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..e41c1be 100644 (file)
--- 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 (file)
--- 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.