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Date: Thu, 10 Nov 2022 10:25:58 +0800
From: Zhang Yi <yi.zhang@...wei.com>
To: <linux-ext4@...r.kernel.org>
CC: <tytso@....edu>, <adilger.kernel@...ger.ca>, <jack@...e.cz>,
<yi.zhang@...wei.com>, <yukuai3@...wei.com>
Subject: [PATCH v2 12/12] ext4: remove simulate fail facility
Now that we have fault injection support for ext4, it could replace
current simulate fail facility entirely, so this patch remove all
ext4_simulate_fail() interface and supports.
Signed-off-by: Zhang Yi <yi.zhang@...wei.com>
---
fs/ext4/balloc.c | 4 +---
fs/ext4/ext4.h | 38 --------------------------------------
fs/ext4/ialloc.c | 4 +---
fs/ext4/inode.c | 6 ++----
fs/ext4/namei.c | 10 +++-------
fs/ext4/sysfs.c | 6 ------
6 files changed, 7 insertions(+), 61 deletions(-)
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index ff5c90f4386d..999e66d9dc45 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -384,8 +384,7 @@ static int ext4_validate_block_bitmap(struct super_block *sb,
if (buffer_verified(bh))
goto verified;
if (unlikely(!ext4_block_bitmap_csum_verify(sb, block_group,
- desc, bh) ||
- ext4_simulate_fail(sb, EXT4_SIM_BBITMAP_CRC))) {
+ desc, bh))) {
ext4_unlock_group(sb, block_group);
ext4_error(sb, "bg %u: bad block bitmap checksum", block_group);
ext4_mark_group_bitmap_corrupted(sb, block_group,
@@ -537,7 +536,6 @@ int ext4_wait_block_bitmap(struct super_block *sb, ext4_group_t block_group,
if (!desc)
return -EFSCORRUPTED;
wait_on_buffer(bh);
- ext4_simulate_fail_bh(sb, bh, EXT4_SIM_BBITMAP_EIO);
if (!buffer_uptodate(bh)) {
ext4_error_err(sb, EIO, "Cannot read block bitmap - "
"block_group = %u, block_bitmap = %llu",
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 96b805992ea5..74b5b36c39d3 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1849,9 +1849,6 @@ struct ext4_sb_info {
struct percpu_rw_semaphore s_writepages_rwsem;
struct dax_device *s_daxdev;
u64 s_dax_part_off;
-#ifdef CONFIG_EXT4_DEBUG
- unsigned long s_simulate_fail;
-#endif
#ifdef CONFIG_EXT4_FAULT_INJECTION
struct ext4_fault_attr s_fault_attr;
#endif
@@ -1966,41 +1963,6 @@ static inline int ext4_test_mount_flag(struct super_block *sb, int bit)
return test_bit(bit, &EXT4_SB(sb)->s_mount_flags);
}
-
-/*
- * Simulate_fail codes
- */
-#define EXT4_SIM_BBITMAP_EIO 1
-#define EXT4_SIM_BBITMAP_CRC 2
-#define EXT4_SIM_IBITMAP_EIO 3
-#define EXT4_SIM_IBITMAP_CRC 4
-#define EXT4_SIM_INODE_EIO 5
-#define EXT4_SIM_INODE_CRC 6
-#define EXT4_SIM_DIRBLOCK_EIO 7
-#define EXT4_SIM_DIRBLOCK_CRC 8
-
-static inline bool ext4_simulate_fail(struct super_block *sb,
- unsigned long code)
-{
-#ifdef CONFIG_EXT4_DEBUG
- struct ext4_sb_info *sbi = EXT4_SB(sb);
-
- if (unlikely(sbi->s_simulate_fail == code)) {
- sbi->s_simulate_fail = 0;
- return true;
- }
-#endif
- return false;
-}
-
-static inline void ext4_simulate_fail_bh(struct super_block *sb,
- struct buffer_head *bh,
- unsigned long code)
-{
- if (!IS_ERR(bh) && ext4_simulate_fail(sb, code))
- clear_buffer_uptodate(bh);
-}
-
/*
* Error number codes for s_{first,last}_error_errno
*
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index e299aa80a718..a45f0c0aaa3a 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -99,8 +99,7 @@ static int ext4_validate_inode_bitmap(struct super_block *sb,
goto verified;
blk = ext4_inode_bitmap(sb, desc);
if (!ext4_inode_bitmap_csum_verify(sb, block_group, desc, bh,
- EXT4_INODES_PER_GROUP(sb) / 8) ||
- ext4_simulate_fail(sb, EXT4_SIM_IBITMAP_CRC)) {
+ EXT4_INODES_PER_GROUP(sb) / 8)) {
ext4_unlock_group(sb, block_group);
ext4_error(sb, "Corrupt inode bitmap - block_group = %u, "
"inode_bitmap = %llu", block_group, blk);
@@ -200,7 +199,6 @@ ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group)
goto read_err;
}
ext4_read_bh(bh, REQ_META | REQ_PRIO, ext4_end_bitmap_read);
- ext4_simulate_fail_bh(sb, bh, EXT4_SIM_IBITMAP_EIO);
if (!buffer_uptodate(bh)) {
err = -EIO;
goto read_err;
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 8c611ad6dac1..20546338bc2a 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4578,7 +4578,6 @@ static int __ext4_get_inode_loc(struct super_block *sb, unsigned long ino,
ext4_read_bh_nowait(bh, REQ_META | REQ_PRIO, NULL);
blk_finish_plug(&plug);
wait_on_buffer(bh);
- ext4_simulate_fail_bh(sb, bh, EXT4_SIM_INODE_EIO);
if (!buffer_uptodate(bh))
goto err;
has_buffer:
@@ -4835,9 +4834,8 @@ struct inode *__ext4_iget(struct super_block *sb, unsigned long ino,
sizeof(gen));
}
- if ((!ext4_inode_csum_verify(inode, raw_inode, ei) ||
- ext4_simulate_fail(sb, EXT4_SIM_INODE_CRC)) &&
- (!(EXT4_SB(sb)->s_mount_state & EXT4_FC_REPLAY))) {
+ if (!ext4_inode_csum_verify(inode, raw_inode, ei) &&
+ (!(EXT4_SB(sb)->s_mount_state & EXT4_FC_REPLAY))) {
ext4_error_inode_err(inode, function, line, 0,
EFSBADCRC, "iget: checksum invalid");
ret = -EFSBADCRC;
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index fa754f1ba4a6..e410e4c0357a 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -138,9 +138,7 @@ static struct buffer_head *__ext4_read_dirblock(struct inode *inode,
return ERR_PTR(-EFSCORRUPTED);
}
- if (ext4_simulate_fail(inode->i_sb, EXT4_SIM_DIRBLOCK_EIO))
- bh = ERR_PTR(-EIO);
- else if (ext4_fault_dirblock_io(inode, block))
+ if (ext4_fault_dirblock_io(inode, block))
bh = ERR_PTR(-EIO);
else
bh = ext4_bread(NULL, inode, block, 0);
@@ -187,8 +185,7 @@ static struct buffer_head *__ext4_read_dirblock(struct inode *inode,
* caller is sure it should be an index block.
*/
if (is_dx_block && type == INDEX) {
- if (ext4_dx_csum_verify(inode, dirent) &&
- !ext4_simulate_fail(inode->i_sb, EXT4_SIM_DIRBLOCK_CRC))
+ if (ext4_dx_csum_verify(inode, dirent))
set_buffer_verified(bh);
else {
ext4_error_inode_err(inode, func, line, block,
@@ -199,8 +196,7 @@ static struct buffer_head *__ext4_read_dirblock(struct inode *inode,
}
}
if (!is_dx_block) {
- if (ext4_dirblock_csum_verify(inode, bh) &&
- !ext4_simulate_fail(inode->i_sb, EXT4_SIM_DIRBLOCK_CRC))
+ if (ext4_dirblock_csum_verify(inode, bh))
set_buffer_verified(bh);
else {
ext4_error_inode_err(inode, func, line, block,
diff --git a/fs/ext4/sysfs.c b/fs/ext4/sysfs.c
index da725e128c89..11fc508de336 100644
--- a/fs/ext4/sysfs.c
+++ b/fs/ext4/sysfs.c
@@ -227,9 +227,6 @@ EXT4_RW_ATTR_SBI_UI(warning_ratelimit_interval_ms, s_warning_ratelimit_state.int
EXT4_RW_ATTR_SBI_UI(warning_ratelimit_burst, s_warning_ratelimit_state.burst);
EXT4_RW_ATTR_SBI_UI(msg_ratelimit_interval_ms, s_msg_ratelimit_state.interval);
EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst);
-#ifdef CONFIG_EXT4_DEBUG
-EXT4_RW_ATTR_SBI_UL(simulate_fail, s_simulate_fail);
-#endif
EXT4_RO_ATTR_SBI_ATOMIC(warning_count, s_warning_count);
EXT4_RO_ATTR_SBI_ATOMIC(msg_count, s_msg_count);
EXT4_RO_ATTR_ES_UI(errors_count, s_error_count);
@@ -294,9 +291,6 @@ static struct attribute *ext4_attrs[] = {
ATTR_LIST(first_error_time),
ATTR_LIST(last_error_time),
ATTR_LIST(journal_task),
-#ifdef CONFIG_EXT4_DEBUG
- ATTR_LIST(simulate_fail),
-#endif
ATTR_LIST(mb_prefetch),
ATTR_LIST(mb_prefetch_limit),
ATTR_LIST(last_trim_minblks),
--
2.31.1
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