[PATCH 1/8] nilfs2: hide function name argument from nilfs_error()
From: Ryusuke Konishi
Date: Thu Jun 02 2016 - 10:04:38 EST
Simplify nilfs_error(), an output function used to report critical
issues in file system. This renames the original nilfs_error()
function to __nilfs_error() and redefines it as a macro to hide its
function name argument within the macro.
Every call site of nilfs_error() is changed to strip __func__ argument
except nilfs_bmap_convert_error(); nilfs_bmap_convert_error() directly
calls __nilfs_error() because it inherits caller's function name.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxxxxxx>
---
fs/nilfs2/bmap.c | 4 ++--
fs/nilfs2/dir.c | 38 +++++++++++++++++---------------------
fs/nilfs2/ifile.c | 3 +--
fs/nilfs2/nilfs.h | 20 +++++++++++++++++++-
fs/nilfs2/super.c | 22 ++++++++++++----------
5 files changed, 51 insertions(+), 36 deletions(-)
diff --git a/fs/nilfs2/bmap.c b/fs/nilfs2/bmap.c
index f2a7877..01fb183 100644
--- a/fs/nilfs2/bmap.c
+++ b/fs/nilfs2/bmap.c
@@ -41,8 +41,8 @@ static int nilfs_bmap_convert_error(struct nilfs_bmap *bmap,
struct inode *inode = bmap->b_inode;
if (err == -EINVAL) {
- nilfs_error(inode->i_sb, fname,
- "broken bmap (inode number=%lu)", inode->i_ino);
+ __nilfs_error(inode->i_sb, fname,
+ "broken bmap (inode number=%lu)", inode->i_ino);
err = -EIO;
}
return err;
diff --git a/fs/nilfs2/dir.c b/fs/nilfs2/dir.c
index e506f4f..746956d 100644
--- a/fs/nilfs2/dir.c
+++ b/fs/nilfs2/dir.c
@@ -140,10 +140,9 @@ out:
/* Too bad, we had an error */
Ebadsize:
- nilfs_error(sb, "nilfs_check_page",
+ nilfs_error(sb,
"size of directory #%lu is not a multiple of chunk size",
- dir->i_ino
- );
+ dir->i_ino);
goto fail;
Eshort:
error = "rec_len is smaller than minimal";
@@ -157,19 +156,18 @@ Enamelen:
Espan:
error = "directory entry across blocks";
bad_entry:
- nilfs_error(sb, "nilfs_check_page", "bad entry in directory #%lu: %s - "
- "offset=%lu, inode=%lu, rec_len=%d, name_len=%d",
- dir->i_ino, error, (page->index<<PAGE_SHIFT)+offs,
- (unsigned long) le64_to_cpu(p->inode),
+ nilfs_error(sb,
+ "bad entry in directory #%lu: %s - offset=%lu, inode=%lu, rec_len=%d, name_len=%d",
+ dir->i_ino, error, (page->index << PAGE_SHIFT) + offs,
+ (unsigned long)le64_to_cpu(p->inode),
rec_len, p->name_len);
goto fail;
Eend:
p = (struct nilfs_dir_entry *)(kaddr + offs);
- nilfs_error(sb, "nilfs_check_page",
- "entry in directory #%lu spans the page boundary"
- "offset=%lu, inode=%lu",
- dir->i_ino, (page->index<<PAGE_SHIFT)+offs,
- (unsigned long) le64_to_cpu(p->inode));
+ nilfs_error(sb,
+ "entry in directory #%lu spans the page boundary offset=%lu, inode=%lu",
+ dir->i_ino, (page->index << PAGE_SHIFT) + offs,
+ (unsigned long)le64_to_cpu(p->inode));
fail:
SetPageError(page);
return false;
@@ -267,8 +265,7 @@ static int nilfs_readdir(struct file *file, struct dir_context *ctx)
struct page *page = nilfs_get_page(inode, n);
if (IS_ERR(page)) {
- nilfs_error(sb, __func__, "bad page in #%lu",
- inode->i_ino);
+ nilfs_error(sb, "bad page in #%lu", inode->i_ino);
ctx->pos += PAGE_SIZE - offset;
return -EIO;
}
@@ -278,8 +275,7 @@ static int nilfs_readdir(struct file *file, struct dir_context *ctx)
NILFS_DIR_REC_LEN(1);
for ( ; (char *)de <= limit; de = nilfs_next_entry(de)) {
if (de->rec_len == 0) {
- nilfs_error(sb, __func__,
- "zero-length directory entry");
+ nilfs_error(sb, "zero-length directory entry");
nilfs_put_page(page);
return -EIO;
}
@@ -345,7 +341,7 @@ nilfs_find_entry(struct inode *dir, const struct qstr *qstr,
kaddr += nilfs_last_byte(dir, n) - reclen;
while ((char *) de <= kaddr) {
if (de->rec_len == 0) {
- nilfs_error(dir->i_sb, __func__,
+ nilfs_error(dir->i_sb,
"zero-length directory entry");
nilfs_put_page(page);
goto out;
@@ -360,7 +356,7 @@ nilfs_find_entry(struct inode *dir, const struct qstr *qstr,
n = 0;
/* next page is past the blocks we've got */
if (unlikely(n > (dir->i_blocks >> (PAGE_SHIFT - 9)))) {
- nilfs_error(dir->i_sb, __func__,
+ nilfs_error(dir->i_sb,
"dir %lu size %lld exceeds block count %llu",
dir->i_ino, dir->i_size,
(unsigned long long)dir->i_blocks);
@@ -469,7 +465,7 @@ int nilfs_add_link(struct dentry *dentry, struct inode *inode)
goto got_it;
}
if (de->rec_len == 0) {
- nilfs_error(dir->i_sb, __func__,
+ nilfs_error(dir->i_sb,
"zero-length directory entry");
err = -EIO;
goto out_unlock;
@@ -541,7 +537,7 @@ int nilfs_delete_entry(struct nilfs_dir_entry *dir, struct page *page)
while ((char *)de < (char *)dir) {
if (de->rec_len == 0) {
- nilfs_error(inode->i_sb, __func__,
+ nilfs_error(inode->i_sb,
"zero-length directory entry");
err = -EIO;
goto out;
@@ -628,7 +624,7 @@ int nilfs_empty_dir(struct inode *inode)
while ((char *)de <= kaddr) {
if (de->rec_len == 0) {
- nilfs_error(inode->i_sb, __func__,
+ nilfs_error(inode->i_sb,
"zero-length directory entry (kaddr=%p, de=%p)",
kaddr, de);
goto not_empty;
diff --git a/fs/nilfs2/ifile.c b/fs/nilfs2/ifile.c
index 1d2b180..b1c9628 100644
--- a/fs/nilfs2/ifile.c
+++ b/fs/nilfs2/ifile.c
@@ -145,8 +145,7 @@ int nilfs_ifile_get_inode_block(struct inode *ifile, ino_t ino,
int err;
if (unlikely(!NILFS_VALID_INODE(sb, ino))) {
- nilfs_error(sb, __func__, "bad inode number: %lu",
- (unsigned long) ino);
+ nilfs_error(sb, "bad inode number: %lu", (unsigned long)ino);
return -EINVAL;
}
diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h
index b1d48bc0..e482c78 100644
--- a/fs/nilfs2/nilfs.h
+++ b/fs/nilfs2/nilfs.h
@@ -299,10 +299,28 @@ static inline int nilfs_mark_inode_dirty_sync(struct inode *inode)
/* super.c */
extern struct inode *nilfs_alloc_inode(struct super_block *);
extern void nilfs_destroy_inode(struct inode *);
+
extern __printf(3, 4)
-void nilfs_error(struct super_block *, const char *, const char *, ...);
+void __nilfs_error(struct super_block *sb, const char *function,
+ const char *fmt, ...);
extern __printf(3, 4)
void nilfs_warning(struct super_block *, const char *, const char *, ...);
+
+#ifdef CONFIG_PRINTK
+
+#define nilfs_error(sb, fmt, ...) \
+ __nilfs_error(sb, __func__, fmt, ##__VA_ARGS__)
+
+#else
+
+#define nilfs_error(sb, fmt, ...) \
+ do { \
+ no_printk(fmt, ##__VA_ARGS__); \
+ __nilfs_error(sb, "", " "); \
+ } while (0)
+
+#endif /* CONFIG_PRINTK */
+
extern struct nilfs_super_block *
nilfs_read_super_block(struct super_block *, u64, int, struct buffer_head **);
extern int nilfs_store_magic_and_option(struct super_block *,
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 666107a..7fe497e 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -91,19 +91,21 @@ static void nilfs_set_error(struct super_block *sb)
}
/**
- * nilfs_error() - report failure condition on a filesystem
+ * __nilfs_error() - report failure condition on a filesystem
*
- * nilfs_error() sets an ERROR_FS flag on the superblock as well as
- * reporting an error message. It should be called when NILFS detects
- * incoherences or defects of meta data on disk. As for sustainable
- * errors such as a single-shot I/O error, nilfs_warning() or the printk()
- * function should be used instead.
+ * __nilfs_error() sets an ERROR_FS flag on the superblock as well as
+ * reporting an error message. This function should be called when
+ * NILFS detects incoherences or defects of meta data on disk.
*
- * The segment constructor must not call this function because it can
- * kill itself.
+ * This implements the body of nilfs_error() macro. Normally,
+ * nilfs_error() should be used. As for sustainable errors such as a
+ * single-shot I/O error, nilfs_warning() or printk() should be used
+ * instead.
+ *
+ * Callers should not add a trailing newline since this will do it.
*/
-void nilfs_error(struct super_block *sb, const char *function,
- const char *fmt, ...)
+void __nilfs_error(struct super_block *sb, const char *function,
+ const char *fmt, ...)
{
struct the_nilfs *nilfs = sb->s_fs_info;
struct va_format vaf;
--
1.8.3.1