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Message-ID: <CACOAw_wO+uO4FmAYujo1uV5=SGRUmxqh_O_vAuofdyUuH=_m2Q@mail.gmail.com>
Date: Thu, 24 Apr 2025 09:22:11 -0700
From: Daeho Jeong <daeho43@...il.com>
To: Chao Yu <chao@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
kernel-team@...roid.com, Daeho Jeong <daehojeong@...gle.com>
Subject: Re: [f2fs-dev] [PATCH] f2fs-tools: introduce fault injection to fsck
On Wed, Apr 23, 2025 at 7:01 PM Chao Yu <chao@...nel.org> wrote:
>
> On 4/19/25 00:56, Daeho Jeong wrote:
> > From: Daeho Jeong <daehojeong@...gle.com>
> >
> > Due to the difficulty of intentionally corrupting specific metadata on
> > some storage devices like zoned storage devices, it is challenging to
> > effectively verify fsck functionality. To facilitate this verification,
> > it is necessary to add a fault injection mode.
>
> Daeho,
>
> What do you think of adding some stats for how many time it was injected
> for each fault type? then we can check whether all faults we needed have
> been triggered and also we can get the triggered count.
Sounds good. Then, can we show the result at the end of the fsck run?
>
> Thanks,
>
> >
> > Signed-off-by: Daeho Jeong <daehojeong@...gle.com>
> > ---
> > fsck/fsck.c | 106 +++++++++++++++++++++++++++++++++-------------
> > fsck/main.c | 22 ++++++++++
> > fsck/mkquota.c | 3 ++
> > include/f2fs_fs.h | 54 +++++++++++++++++++++++
> > man/fsck.f2fs.8 | 36 ++++++++++++++++
> > 5 files changed, 192 insertions(+), 29 deletions(-)
> >
> > diff --git a/fsck/fsck.c b/fsck/fsck.c
> > index 8155cbd..e879d8c 100644
> > --- a/fsck/fsck.c
> > +++ b/fsck/fsck.c
> > @@ -16,6 +16,20 @@
> > char *tree_mark;
> > uint32_t tree_mark_size = 256;
> >
> > +const char *f2fs_fault_name[FAULT_MAX] = {
> > + [FAULT_SEG_TYPE] = "invalid segment type",
> > + [FAULT_SUM_TYPE] = "invalid summary type",
> > + [FAULT_SUM_ENT] = "invalid summary entry",
> > + [FAULT_NAT] = "invalid nat entry",
> > + [FAULT_NODE] = "invalid node block",
> > + [FAULT_XATTR_ENT] = "invalid xattr entry",
> > + [FAULT_COMPR] = "invalid compression type",
> > + [FAULT_INODE] = "invalid inode info",
> > + [FAULT_DENTRY] = "invalid dentry",
> > + [FAULT_DATA] = "invalid data block",
> > + [FAULT_QUOTA] = "invalid quota",
> > +};
> > +
> > int f2fs_set_main_bitmap(struct f2fs_sb_info *sbi, u32 blk, int type)
> > {
> > struct f2fs_fsck *fsck = F2FS_FSCK(sbi);
> > @@ -23,9 +37,9 @@ int f2fs_set_main_bitmap(struct f2fs_sb_info *sbi, u32 blk, int type)
> > int fix = 0;
> >
> > se = get_seg_entry(sbi, GET_SEGNO(sbi, blk));
> > - if (se->type >= NO_CHECK_TYPE)
> > - fix = 1;
> > - else if (IS_DATASEG(se->type) != IS_DATASEG(type))
> > + if (time_to_inject(FAULT_SEG_TYPE) ||
> > + (se->type >= NO_CHECK_TYPE) ||
> > + (IS_DATASEG(se->type) != IS_DATASEG(type)))
> > fix = 1;
> >
> > /* just check data and node types */
> > @@ -168,7 +182,8 @@ static int is_valid_ssa_node_blk(struct f2fs_sb_info *sbi, u32 nid,
> >
> > sum_blk = get_sum_block(sbi, segno, &type);
> >
> > - if (type != SEG_TYPE_NODE && type != SEG_TYPE_CUR_NODE) {
> > + if (time_to_inject(FAULT_SUM_TYPE) ||
> > + (type != SEG_TYPE_NODE && type != SEG_TYPE_CUR_NODE)) {
> > /* can't fix current summary, then drop the block */
> > if (!c.fix_on || type < 0) {
> > ASSERT_MSG("Summary footer is not for node segment");
> > @@ -189,7 +204,8 @@ static int is_valid_ssa_node_blk(struct f2fs_sb_info *sbi, u32 nid,
> >
> > sum_entry = &(sum_blk->entries[offset]);
> >
> > - if (le32_to_cpu(sum_entry->nid) != nid) {
> > + if (time_to_inject(FAULT_SUM_ENT) ||
> > + (le32_to_cpu(sum_entry->nid) != nid)) {
> > if (!c.fix_on || type < 0) {
> > DBG(0, "nid [0x%x]\n", nid);
> > DBG(0, "target blk_addr [0x%x]\n", blk_addr);
> > @@ -282,7 +298,7 @@ static int is_valid_ssa_data_blk(struct f2fs_sb_info *sbi, u32 blk_addr,
> > struct f2fs_summary *sum_entry;
> > struct seg_entry * se;
> > u32 segno, offset;
> > - int need_fix = 0, ret = 0;
> > + int need_fix = 0, ret = 0, fault_sum_ent = 0;
> > int type;
> >
> > if (get_sb(feature) & F2FS_FEATURE_RO)
> > @@ -293,7 +309,8 @@ static int is_valid_ssa_data_blk(struct f2fs_sb_info *sbi, u32 blk_addr,
> >
> > sum_blk = get_sum_block(sbi, segno, &type);
> >
> > - if (type != SEG_TYPE_DATA && type != SEG_TYPE_CUR_DATA) {
> > + if (time_to_inject(FAULT_SUM_TYPE) ||
> > + (type != SEG_TYPE_DATA && type != SEG_TYPE_CUR_DATA)) {
> > /* can't fix current summary, then drop the block */
> > if (!c.fix_on || type < 0) {
> > ASSERT_MSG("Summary footer is not for data segment");
> > @@ -314,7 +331,10 @@ static int is_valid_ssa_data_blk(struct f2fs_sb_info *sbi, u32 blk_addr,
> >
> > sum_entry = &(sum_blk->entries[offset]);
> >
> > - if (le32_to_cpu(sum_entry->nid) != parent_nid ||
> > + if (time_to_inject(FAULT_SUM_ENT))
> > + fault_sum_ent = 1;
> > +
> > + if (fault_sum_ent || le32_to_cpu(sum_entry->nid) != parent_nid ||
> > sum_entry->version != version ||
> > le16_to_cpu(sum_entry->ofs_in_node) != idx_in_node) {
> > if (!c.fix_on || type < 0) {
> > @@ -333,7 +353,8 @@ static int is_valid_ssa_data_blk(struct f2fs_sb_info *sbi, u32 blk_addr,
> > DBG(0, "Target data block addr [0x%x]\n", blk_addr);
> > ASSERT_MSG("Invalid data seg summary\n");
> > ret = -EINVAL;
> > - } else if (is_valid_summary(sbi, sum_entry, blk_addr)) {
> > + } else if (!fault_sum_ent &&
> > + is_valid_summary(sbi, sum_entry, blk_addr)) {
> > /* delete wrong index */
> > ret = -EINVAL;
> > } else {
> > @@ -397,6 +418,9 @@ err:
> > static int sanity_check_nat(struct f2fs_sb_info *sbi, u32 nid,
> > struct node_info *ni)
> > {
> > + if (time_to_inject(FAULT_NAT))
> > + return -EINVAL;
> > +
> > if (!IS_VALID_NID(sbi, nid)) {
> > ASSERT_MSG("nid is not valid. [0x%x]", nid);
> > return -EINVAL;
> > @@ -436,6 +460,9 @@ static int sanity_check_nid(struct f2fs_sb_info *sbi, u32 nid,
> > struct f2fs_fsck *fsck = F2FS_FSCK(sbi);
> > int ret;
> >
> > + if (time_to_inject(FAULT_NODE))
> > + return -EINVAL;
> > +
> > ret = sanity_check_nat(sbi, nid, ni);
> > if (ret)
> > return ret;
> > @@ -865,7 +892,7 @@ int chk_extended_attributes(struct f2fs_sb_info *sbi, u32 nid,
> > "end of list", nid);
> > need_fix = true;
> > }
> > - if (need_fix && c.fix_on) {
> > + if ((time_to_inject(FAULT_XATTR_ENT) || need_fix) && c.fix_on) {
> > memset(ent, 0, (u8 *)last_base_addr - (u8 *)ent);
> > write_all_xattrs(sbi, inode, xattr_size, xattr);
> > FIX_MSG("[0x%x] nullify wrong xattr entries", nid);
> > @@ -907,7 +934,8 @@ void fsck_chk_inode_blk(struct f2fs_sb_info *sbi, u32 nid,
> > if (!compressed)
> > goto check_next;
> >
> > - if (!compr_supported || (node_blk->i.i_inline & F2FS_INLINE_DATA)) {
> > + if (time_to_inject(FAULT_COMPR) || !compr_supported ||
> > + (node_blk->i.i_inline & F2FS_INLINE_DATA)) {
> > /*
> > * The 'compression' flag in i_flags affects the traverse of
> > * the node tree. Thus, it must be fixed unconditionally
> > @@ -943,12 +971,13 @@ check_next:
> > f2fs_set_main_bitmap(sbi, ni->blk_addr,
> > CURSEG_WARM_NODE);
> >
> > - if (i_links == 0 && (ftype == F2FS_FT_CHRDEV ||
> > + if (time_to_inject(FAULT_INODE) ||
> > + (i_links == 0 && (ftype == F2FS_FT_CHRDEV ||
> > ftype == F2FS_FT_BLKDEV ||
> > ftype == F2FS_FT_FIFO ||
> > ftype == F2FS_FT_SOCK ||
> > ftype == F2FS_FT_SYMLINK ||
> > - ftype == F2FS_FT_REG_FILE)) {
> > + ftype == F2FS_FT_REG_FILE))) {
> > ASSERT_MSG("ino: 0x%x ftype: %d has i_links: %u",
> > nid, ftype, i_links);
> > if (c.fix_on) {
> > @@ -1008,7 +1037,8 @@ check_next:
> > if (c.feature & F2FS_FEATURE_EXTRA_ATTR) {
> > unsigned int isize =
> > le16_to_cpu(node_blk->i.i_extra_isize);
> > - if (isize > 4 * DEF_ADDRS_PER_INODE) {
> > + if (time_to_inject(FAULT_INODE) ||
> > + (isize > 4 * DEF_ADDRS_PER_INODE)) {
> > ASSERT_MSG("[0x%x] wrong i_extra_isize=0x%x",
> > nid, isize);
> > if (c.fix_on) {
> > @@ -1038,8 +1068,9 @@ check_next:
> > unsigned int inline_size =
> > le16_to_cpu(node_blk->i.i_inline_xattr_size);
> >
> > - if (!inline_size ||
> > - inline_size > MAX_INLINE_XATTR_SIZE) {
> > + if (time_to_inject(FAULT_INODE) ||
> > + (!inline_size ||
> > + inline_size > MAX_INLINE_XATTR_SIZE)) {
> > ASSERT_MSG("[0x%x] wrong inline_xattr_size:%u",
> > nid, inline_size);
> > if (c.fix_on) {
> > @@ -1056,9 +1087,10 @@ check_next:
> > }
> > ofs = get_extra_isize(node_blk);
> >
> > - if ((node_blk->i.i_flags & cpu_to_le32(F2FS_CASEFOLD_FL)) &&
> > - (!S_ISDIR(le16_to_cpu(node_blk->i.i_mode)) ||
> > - !(c.feature & F2FS_FEATURE_CASEFOLD))) {
> > + if (time_to_inject(FAULT_INODE) ||
> > + ((node_blk->i.i_flags & cpu_to_le32(F2FS_CASEFOLD_FL)) &&
> > + (!S_ISDIR(le16_to_cpu(node_blk->i.i_mode)) ||
> > + !(c.feature & F2FS_FEATURE_CASEFOLD)))) {
> > ASSERT_MSG("[0x%x] unexpected casefold flag", nid);
> > if (c.fix_on) {
> > FIX_MSG("ino[0x%x] clear casefold flag", nid);
> > @@ -1077,7 +1109,8 @@ check_next:
> > qf_szchk_type[cur_qtype] = QF_SZCHK_INLINE;
> > block_t blkaddr = le32_to_cpu(node_blk->i.i_addr[ofs]);
> >
> > - if (blkaddr != NULL_ADDR) {
> > + if (time_to_inject(FAULT_INODE) ||
> > + (blkaddr != NULL_ADDR)) {
> > ASSERT_MSG("[0x%x] wrong inline reserve blkaddr:%u",
> > nid, blkaddr);
> > if (c.fix_on) {
> > @@ -1088,7 +1121,8 @@ check_next:
> > need_fix = 1;
> > }
> > }
> > - if (i_size > inline_size) {
> > + if (time_to_inject(FAULT_INODE) ||
> > + (i_size > inline_size)) {
> > ASSERT_MSG("[0x%x] wrong inline size:%lu",
> > nid, (unsigned long)i_size);
> > if (c.fix_on) {
> > @@ -1118,7 +1152,7 @@ check_next:
> > block_t blkaddr = le32_to_cpu(node_blk->i.i_addr[ofs]);
> >
> > DBG(3, "ino[0x%x] has inline dentry!\n", nid);
> > - if (blkaddr != 0) {
> > + if (time_to_inject(FAULT_INODE) || (blkaddr != 0)) {
> > ASSERT_MSG("[0x%x] wrong inline reserve blkaddr:%u",
> > nid, blkaddr);
> > if (c.fix_on) {
> > @@ -1728,6 +1762,9 @@ static int f2fs_check_hash_code(int encoding, int casefolded,
> > struct f2fs_dir_entry *dentry,
> > const unsigned char *name, u32 len, int enc_name)
> > {
> > + if (time_to_inject(FAULT_DENTRY))
> > + return 1;
> > +
> > /* Casefolded Encrypted names require a key to compute siphash */
> > if (enc_name && casefolded)
> > return 0;
> > @@ -1799,7 +1836,8 @@ static int __chk_dots_dentries(struct f2fs_sb_info *sbi,
> > int fixed = 0;
> >
> > if ((name[0] == '.' && len == 1)) {
> > - if (le32_to_cpu(dentry->ino) != child->p_ino) {
> > + if (time_to_inject(FAULT_DENTRY) ||
> > + (le32_to_cpu(dentry->ino) != child->p_ino)) {
> > ASSERT_MSG("Bad inode number[0x%x] for '.', parent_ino is [0x%x]\n",
> > le32_to_cpu(dentry->ino), child->p_ino);
> > dentry->ino = cpu_to_le32(child->p_ino);
> > @@ -1809,13 +1847,16 @@ static int __chk_dots_dentries(struct f2fs_sb_info *sbi,
> >
> > if (name[0] == '.' && name[1] == '.' && len == 2) {
> > if (child->p_ino == F2FS_ROOT_INO(sbi)) {
> > - if (le32_to_cpu(dentry->ino) != F2FS_ROOT_INO(sbi)) {
> > + if (time_to_inject(FAULT_DENTRY) ||
> > + (le32_to_cpu(dentry->ino) !=
> > + F2FS_ROOT_INO(sbi))) {
> > ASSERT_MSG("Bad inode number[0x%x] for '..'\n",
> > le32_to_cpu(dentry->ino));
> > dentry->ino = cpu_to_le32(F2FS_ROOT_INO(sbi));
> > fixed = 1;
> > }
> > - } else if (le32_to_cpu(dentry->ino) != child->pp_ino) {
> > + } else if (time_to_inject(FAULT_DENTRY) ||
> > + (le32_to_cpu(dentry->ino) != child->pp_ino)) {
> > ASSERT_MSG("Bad inode number[0x%x] for '..', parent parent ino is [0x%x]\n",
> > le32_to_cpu(dentry->ino), child->pp_ino);
> > dentry->ino = cpu_to_le32(child->pp_ino);
> > @@ -1826,7 +1867,7 @@ static int __chk_dots_dentries(struct f2fs_sb_info *sbi,
> > if (f2fs_check_hash_code(get_encoding(sbi), casefolded, dentry, name, len, enc_name))
> > fixed = 1;
> >
> > - if (name[len] != '\0') {
> > + if (time_to_inject(FAULT_DENTRY) || (name[len] != '\0')) {
> > ASSERT_MSG("'.' is not NULL terminated\n");
> > name[len] = '\0';
> > memcpy(*filename, name, len);
> > @@ -1889,7 +1930,8 @@ static int __chk_dentries(struct f2fs_sb_info *sbi, int casefolded,
> > i++;
> > continue;
> > }
> > - if (!IS_VALID_NID(sbi, le32_to_cpu(dentry[i].ino))) {
> > + if (time_to_inject(FAULT_DENTRY) ||
> > + !IS_VALID_NID(sbi, le32_to_cpu(dentry[i].ino))) {
> > ASSERT_MSG("Bad dentry 0x%x with invalid NID/ino 0x%x",
> > i, le32_to_cpu(dentry[i].ino));
> > if (c.fix_on) {
> > @@ -1903,7 +1945,9 @@ static int __chk_dentries(struct f2fs_sb_info *sbi, int casefolded,
> > }
> >
> > ftype = dentry[i].file_type;
> > - if ((ftype <= F2FS_FT_UNKNOWN || ftype > F2FS_FT_LAST_FILE_TYPE)) {
> > + if (time_to_inject(FAULT_DENTRY) ||
> > + (ftype <= F2FS_FT_UNKNOWN ||
> > + ftype > F2FS_FT_LAST_FILE_TYPE)) {
> > ASSERT_MSG("Bad dentry 0x%x with unexpected ftype 0x%x",
> > le32_to_cpu(dentry[i].ino), ftype);
> > if (c.fix_on) {
> > @@ -1918,7 +1962,8 @@ static int __chk_dentries(struct f2fs_sb_info *sbi, int casefolded,
> >
> > name_len = le16_to_cpu(dentry[i].name_len);
> >
> > - if (name_len == 0 || name_len > F2FS_NAME_LEN) {
> > + if (time_to_inject(FAULT_DENTRY) ||
> > + (name_len == 0 || name_len > F2FS_NAME_LEN)) {
> > ASSERT_MSG("Bad dentry 0x%x with invalid name_len", i);
> > if (c.fix_on) {
> > FIX_MSG("Clear bad dentry 0x%x", i);
> > @@ -2153,6 +2198,9 @@ int fsck_chk_data_blk(struct f2fs_sb_info *sbi, struct f2fs_inode *inode,
> > return 0;
> > }
> >
> > + if (time_to_inject(FAULT_DATA))
> > + return -EINVAL;
> > +
> > if (!f2fs_is_valid_blkaddr(sbi, blk_addr, DATA_GENERIC)) {
> > ASSERT_MSG("blkaddress is not valid. [0x%x]", blk_addr);
> > return -EINVAL;
> > diff --git a/fsck/main.c b/fsck/main.c
> > index 47ba6c9..29792d8 100644
> > --- a/fsck/main.c
> > +++ b/fsck/main.c
> > @@ -91,6 +91,8 @@ void fsck_usage()
> > MSG(0, " --no-kernel-check skips detecting kernel change\n");
> > MSG(0, " --kernel-check checks kernel change\n");
> > MSG(0, " --debug-cache to debug cache when -c is used\n");
> > + MSG(0, " --fault_injection=%%d to enable fault injection with specified injection rate\n");
> > + MSG(0, " --fault_type=%%d to configure enabled fault injection type\n");
> > exit(1);
> > }
> >
> > @@ -263,6 +265,8 @@ void f2fs_parse_options(int argc, char *argv[])
> > {"no-kernel-check", no_argument, 0, 2},
> > {"kernel-check", no_argument, 0, 3},
> > {"debug-cache", no_argument, 0, 4},
> > + {"fault_injection", required_argument, 0, 5},
> > + {"fault_type", required_argument, 0, 6},
> > {0, 0, 0, 0}
> > };
> >
> > @@ -287,6 +291,24 @@ void f2fs_parse_options(int argc, char *argv[])
> > case 4:
> > c.cache_config.dbg_en = true;
> > break;
> > + case 5:
> > + val = atoi(optarg);
> > + if ((unsigned int)val <= 1) {
> > + MSG(0, "\tError: injection rate must be larger "
> > + "than 1: %d\n", val);
> > + fsck_usage();
> > + }
> > + c.fault_info.inject_rate = val;
> > + c.fault_info.inject_type = F2FS_ALL_FAULT_TYPE;
> > + break;
> > + case 6:
> > + val = atoi(optarg);
> > + if (val >= (1UL << (FAULT_MAX))) {
> > + MSG(0, "\tError: Invalid inject type: %x\n", val);
> > + fsck_usage();
> > + }
> > + c.fault_info.inject_type = val;
> > + break;
> > case 'a':
> > c.auto_fix = 1;
> > MSG(0, "Info: Automatic fix mode enabled.\n");
> > diff --git a/fsck/mkquota.c b/fsck/mkquota.c
> > index 2451b58..eb63fc9 100644
> > --- a/fsck/mkquota.c
> > +++ b/fsck/mkquota.c
> > @@ -372,6 +372,9 @@ errcode_t quota_compare_and_update(struct f2fs_sb_info *sbi,
> > dict_t *dict = qctx->quota_dict[qtype];
> > errcode_t err = 0;
> >
> > + if (time_to_inject(FAULT_QUOTA))
> > + return -EINVAL;
> > +
> > if (!dict)
> > goto out;
> >
> > diff --git a/include/f2fs_fs.h b/include/f2fs_fs.h
> > index bb40adc..3e1056c 100644
> > --- a/include/f2fs_fs.h
> > +++ b/include/f2fs_fs.h
> > @@ -1476,6 +1476,33 @@ enum {
> > F2FS_FEATURE_NAT_BITS = 0x0001,
> > };
> >
> > +/* Fault inject control */
> > +enum {
> > + FAULT_SEG_TYPE,
> > + FAULT_SUM_TYPE,
> > + FAULT_SUM_ENT,
> > + FAULT_NAT,
> > + FAULT_NODE,
> > + FAULT_XATTR_ENT,
> > + FAULT_COMPR,
> > + FAULT_INODE,
> > + FAULT_DENTRY,
> > + FAULT_DATA,
> > + FAULT_QUOTA,
> > + FAULT_MAX
> > +};
> > +
> > +#define F2FS_ALL_FAULT_TYPE ((1UL << (FAULT_MAX)) - 1)
> > +
> > +struct f2fs_fault_info {
> > + int inject_ops;
> > + int inject_rate;
> > + unsigned int inject_type;
> > +};
> > +
> > +extern const char *f2fs_fault_name[FAULT_MAX];
> > +#define IS_FAULT_SET(fi, type) ((fi)->inject_type & (1UL << (type)))
> > +
> > struct f2fs_configuration {
> > uint32_t conf_reserved_sections;
> > uint32_t reserved_segments;
> > @@ -1604,6 +1631,9 @@ struct f2fs_configuration {
> > struct f2fs_journal nat_jnl;
> > char nat_bytes[F2FS_MAX_BLKSIZE];
> > };
> > +
> > + /* Fault injection control */
> > + struct f2fs_fault_info fault_info;
> > };
> >
> > extern int utf8_to_utf16(char *, const char *, size_t, size_t);
> > @@ -2131,4 +2161,28 @@ static inline void check_block_struct_sizes(void)
> > + NR_DENTRY_IN_BLOCK * F2FS_SLOT_LEN * sizeof(u8) == F2FS_BLKSIZE);
> > }
> >
> > +/* Fault inject control */
> > +#define time_to_inject(type) __time_to_inject(type, __func__, \
> > + __builtin_return_address(0))
> > +static inline bool __time_to_inject(int type, const char *func,
> > + const char *parent_func)
> > +{
> > + struct f2fs_fault_info *ffi = &c.fault_info;
> > +
> > + if (!ffi->inject_rate)
> > + return false;
> > +
> > + if (!IS_FAULT_SET(ffi, type))
> > + return false;
> > +
> > + ffi->inject_ops++;
> > + if (ffi->inject_ops >= ffi->inject_rate) {
> > + ffi->inject_ops = 0;
> > + MSG(0, "inject %s in %s of %p\n",
> > + f2fs_fault_name[type], func, parent_func);
> > + return true;
> > + }
> > + return false;
> > +}
> > +
> > #endif /*__F2FS_FS_H */
> > diff --git a/man/fsck.f2fs.8 b/man/fsck.f2fs.8
> > index e39a846..3762e6d 100644
> > --- a/man/fsck.f2fs.8
> > +++ b/man/fsck.f2fs.8
> > @@ -67,6 +67,42 @@ Enable to show every directory entries in the partition.
> > Specify the level of debugging options.
> > The default number is 0, which shows basic debugging messages.
> > .TP
> > +.BI \-\-fault_injection=%d " enable fault injection"
> > +Enable fault injection in all supported types with specified injection rate.
> > +.TP
> > +.BI \-\-fault_type=%d " configure fault injection type"
> > +Support configuring fault injection type, should be enabled with
> > +fault_injection option, fault type value is shown below, it supports
> > +single or combined type.
> > +.br
> > +=========================== ===========
> > +.br
> > +Type_Name Type_Value
> > +.br
> > +=========================== ===========
> > +.br
> > +FAULT_SEG_TYPE 0x000000001
> > +.br
> > +FAULT_SUM_TYPE 0x000000002
> > +.br
> > +FAULT_SUM_ENT 0x000000004
> > +.br
> > +FAULT_NAT 0x000000008
> > +.br
> > +FAULT_NODE 0x000000010
> > +.br
> > +FAULT_XATTR_ENT 0x000000020
> > +.br
> > +FAULT_COMPR 0x000000040
> > +.br
> > +FAULT_INODE 0x000000080
> > +.br
> > +FAULT_DENTRY 0x000000100
> > +.br
> > +FAULT_DATA 0x000000200
> > +.br
> > +FAULT_QUOTA 0x000000400
> > +.TP
> > .SH AUTHOR
> > Initial checking code was written by Byoung Geun Kim <bgbg.kim@...sung.com>.
> > Jaegeuk Kim <jaegeuk@...nel.org> reworked most parts of the codes to support
>
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