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Date: Mon, 25 Dec 2023 22:43:35 +0800
From: Chao Yu <chao@...nel.org>
To: jaegeuk@...nel.org
Cc: linux-f2fs-devel@...ts.sourceforge.net,
linux-kernel@...r.kernel.org,
Chao Yu <chao@...nel.org>
Subject: [PATCH v2 6/6] f2fs: introduce FAULT_INCONSISTENCE
We will encounter below inconsistent status when FAULT_BLKADDR type
fault injection is on.
Info: checkpoint state = d6 : nat_bits crc fsck compacted_summary orphan_inodes sudden-power-off
[ASSERT] (fsck_chk_inode_blk:1254) --> ino: 0x1c100 has i_blocks: 000000c0, but has 191 blocks
[FIX] (fsck_chk_inode_blk:1260) --> [0x1c100] i_blocks=0x000000c0 -> 0xbf
[FIX] (fsck_chk_inode_blk:1269) --> [0x1c100] i_compr_blocks=0x00000026 -> 0x27
[ASSERT] (fsck_chk_inode_blk:1254) --> ino: 0x1cadb has i_blocks: 0000002f, but has 46 blocks
[FIX] (fsck_chk_inode_blk:1260) --> [0x1cadb] i_blocks=0x0000002f -> 0x2e
[FIX] (fsck_chk_inode_blk:1269) --> [0x1cadb] i_compr_blocks=0x00000011 -> 0x12
[ASSERT] (fsck_chk_inode_blk:1254) --> ino: 0x1c62c has i_blocks: 00000002, but has 1 blocks
[FIX] (fsck_chk_inode_blk:1260) --> [0x1c62c] i_blocks=0x00000002 -> 0x1
After we inject fault into f2fs_is_valid_blkaddr() during truncation,
a) it missed to increase @nr_free or @valid_blocks
b) it can cause in blkaddr leak in truncated dnode
Which may cause inconsistent status.
This patch separates FAULT_INCONSISTENCE from FAULT_BLKADDR, so that
we can:
a) use FAULT_INCONSISTENCE in f2fs_truncate_data_blocks_range() to
simulate inconsistent issue independently,
b) FAULT_BLKADDR fault will not cause any inconsistent status, we can
just use it to check error path handling in kernel side.
Signed-off-by: Chao Yu <chao@...nel.org>
---
v2:
- make __f2fs_is_valid_blkaddr() void.
Documentation/ABI/testing/sysfs-fs-f2fs | 1 +
Documentation/filesystems/f2fs.rst | 1 +
fs/f2fs/checkpoint.c | 19 +++++++++++++++----
fs/f2fs/f2fs.h | 3 +++
fs/f2fs/file.c | 8 ++++++--
fs/f2fs/super.c | 1 +
6 files changed, 27 insertions(+), 6 deletions(-)
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs
index 4f1d4e636d67..649aabac16c2 100644
--- a/Documentation/ABI/testing/sysfs-fs-f2fs
+++ b/Documentation/ABI/testing/sysfs-fs-f2fs
@@ -708,6 +708,7 @@ Description: Support configuring fault injection type, should be
FAULT_DQUOT_INIT 0x000010000
FAULT_LOCK_OP 0x000020000
FAULT_BLKADDR 0x000040000
+ FAULT_INCONSISTENCE 0x000080000
=================== ===========
What: /sys/fs/f2fs/<disk>/discard_io_aware_gran
diff --git a/Documentation/filesystems/f2fs.rst b/Documentation/filesystems/f2fs.rst
index d32c6209685d..5616fb8ae207 100644
--- a/Documentation/filesystems/f2fs.rst
+++ b/Documentation/filesystems/f2fs.rst
@@ -206,6 +206,7 @@ fault_type=%d Support configuring fault injection type, should be
FAULT_DQUOT_INIT 0x000010000
FAULT_LOCK_OP 0x000020000
FAULT_BLKADDR 0x000040000
+ FAULT_INCONSISTENCE 0x000080000
=================== ===========
mode=%s Control block allocation mode which supports "adaptive"
and "lfs". In "lfs" mode, there should be no random
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index b0597a539fc5..84546f529cf0 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -170,12 +170,9 @@ static bool __is_bitmap_valid(struct f2fs_sb_info *sbi, block_t blkaddr,
return exist;
}
-bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
+static bool __f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
block_t blkaddr, int type)
{
- if (time_to_inject(sbi, FAULT_BLKADDR))
- return false;
-
switch (type) {
case META_NAT:
break;
@@ -230,6 +227,20 @@ bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
return true;
}
+bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
+ block_t blkaddr, int type)
+{
+ if (time_to_inject(sbi, FAULT_BLKADDR))
+ return false;
+ return __f2fs_is_valid_blkaddr(sbi, blkaddr, type);
+}
+
+bool f2fs_is_valid_blkaddr_raw(struct f2fs_sb_info *sbi,
+ block_t blkaddr, int type)
+{
+ return __f2fs_is_valid_blkaddr(sbi, blkaddr, type);
+}
+
/*
* Readahead CP/NAT/SIT/SSA/POR pages
*/
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 34b20700b5ec..3985296e64cb 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -61,6 +61,7 @@ enum {
FAULT_DQUOT_INIT,
FAULT_LOCK_OP,
FAULT_BLKADDR,
+ FAULT_INCONSISTENCE,
FAULT_MAX,
};
@@ -3767,6 +3768,8 @@ struct page *f2fs_get_meta_page_retry(struct f2fs_sb_info *sbi, pgoff_t index);
struct page *f2fs_get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index);
bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
block_t blkaddr, int type);
+bool f2fs_is_valid_blkaddr_raw(struct f2fs_sb_info *sbi,
+ block_t blkaddr, int type);
int f2fs_ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
int type, bool sync);
void f2fs_ra_meta_pages_cond(struct f2fs_sb_info *sbi, pgoff_t index,
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 9f4e21b5916c..b5149f1f2a20 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -590,9 +590,13 @@ void f2fs_truncate_data_blocks_range(struct dnode_of_data *dn, int count)
f2fs_set_data_blkaddr(dn, NULL_ADDR);
if (__is_valid_data_blkaddr(blkaddr)) {
- if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
- DATA_GENERIC_ENHANCE))
+ if (time_to_inject(sbi, FAULT_INCONSISTENCE))
+ continue;
+ if (!f2fs_is_valid_blkaddr_raw(sbi, blkaddr,
+ DATA_GENERIC_ENHANCE)) {
+ f2fs_handle_error(sbi, ERROR_INVALID_BLKADDR);
continue;
+ }
if (compressed_cluster)
valid_blocks++;
}
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 206d03c82d96..9a5c5e06f766 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -62,6 +62,7 @@ const char *f2fs_fault_name[FAULT_MAX] = {
[FAULT_DQUOT_INIT] = "dquot initialize",
[FAULT_LOCK_OP] = "lock_op",
[FAULT_BLKADDR] = "invalid blkaddr",
+ [FAULT_INCONSISTENCE] = "inconsistence",
};
void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
--
2.40.1
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