From cae3d4ca6fd6872d8e9c21eff0e56398c938100a Mon Sep 17 00:00:00 2001 From: Ryusuke Konishi Date: Tue, 2 Aug 2016 14:05:00 -0700 Subject: [PATCH] nilfs2: hide function name argument from nilfs_error() 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. Link: http://lkml.kernel.org/r/1464875891-5443-2-git-send-email-konishi.ryusuke@lab.ntt.co.jp Signed-off-by: Ryusuke Konishi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- 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 f2a7877e0c8c..01fb1831ca25 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 e506f4f7120a..746956d2937a 100644 --- a/fs/nilfs2/dir.c +++ b/fs/nilfs2/dir.c @@ -140,10 +140,9 @@ static bool nilfs_check_page(struct page *page) /* 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 @@ static bool nilfs_check_page(struct page *page) 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<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<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 1d2b1805327a..b1c96285aa4a 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 b1d48bc0532d..e482c78bcc86 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 666107a18a22..7fe497eb2181 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; -- GitLab