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Date: Sat, 3 Sep 2022 11:01:45 +0800
From: Jason Yan <yanaijie@...wei.com>
To: <tytso@....edu>, <adilger.kernel@...ger.ca>, <jack@...e.cz>,
<ritesh.list@...il.com>, <lczerner@...hat.com>,
<linux-ext4@...r.kernel.org>
CC: Jason Yan <yanaijie@...wei.com>
Subject: [PATCH v2 02/13] ext4: remove cantfind_ext4 error handler
The 'cantfind_ext4' error handler is just a error msg print and then
goto failed_mount. This two level goto makes the code complex and not
easy to read. The only benefit is that is saves a little bit code.
However some branches can merge and some branches dot not even need it.
So do some refactor and remove it.
Signed-off-by: Jason Yan <yanaijie@...wei.com>
Reviewed-by: Jan Kara <jack@...e.cz>
---
fs/ext4/super.c | 29 +++++++++++++----------------
1 file changed, 13 insertions(+), 16 deletions(-)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 6126da867b26..6fced457ba3f 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4373,8 +4373,12 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
es = (struct ext4_super_block *) (bh->b_data + offset);
sbi->s_es = es;
sb->s_magic = le16_to_cpu(es->s_magic);
- if (sb->s_magic != EXT4_SUPER_MAGIC)
- goto cantfind_ext4;
+ if (sb->s_magic != EXT4_SUPER_MAGIC) {
+ if (!silent)
+ ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem");
+ goto failed_mount;
+ }
+
sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written);
/* Warn if metadata_csum and gdt_csum are both set. */
@@ -4387,8 +4391,7 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
if (!ext4_verify_csum_type(sb, es)) {
ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with "
"unknown checksum algorithm.");
- silent = 1;
- goto cantfind_ext4;
+ goto failed_mount;
}
ext4_setup_csum_trigger(sb, EXT4_JTR_ORPHAN_FILE,
ext4_orphan_file_block_trigger);
@@ -4406,9 +4409,8 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
if (!ext4_superblock_csum_verify(sb, es)) {
ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with "
"invalid superblock checksum. Run e2fsck?");
- silent = 1;
ret = -EFSBADCRC;
- goto cantfind_ext4;
+ goto failed_mount;
}
/* Precompute checksum seed for all metadata */
@@ -4798,8 +4800,11 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group);
sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb);
- if (sbi->s_inodes_per_block == 0)
- goto cantfind_ext4;
+ if (sbi->s_inodes_per_block == 0 || sbi->s_blocks_per_group == 0) {
+ if (!silent)
+ ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem");
+ goto failed_mount;
+ }
if (sbi->s_inodes_per_group < sbi->s_inodes_per_block ||
sbi->s_inodes_per_group > blocksize * 8) {
ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n",
@@ -4896,9 +4901,6 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
goto failed_mount;
}
- if (EXT4_BLOCKS_PER_GROUP(sb) == 0)
- goto cantfind_ext4;
-
/* check blocks count against device size */
blocks_count = sb_bdev_nr_blocks(sb);
if (blocks_count && ext4_blocks_count(es) > blocks_count) {
@@ -5408,11 +5410,6 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
return 0;
-cantfind_ext4:
- if (!silent)
- ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem");
- goto failed_mount;
-
failed_mount9:
ext4_release_orphan_info(sb);
failed_mount8:
--
2.31.1
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