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charset="utf-8" This patch supports to inject fault into f2fs_down_write_trylock(). Usage: a) echo 524288 > /sys/fs/f2fs//inject_type or b) mount -o fault_type=3D524288 Signed-off-by: Yangtao Li --- Documentation/ABI/testing/sysfs-fs-f2fs | 1 + Documentation/filesystems/f2fs.rst | 1 + fs/f2fs/checkpoint.c | 4 ++-- fs/f2fs/f2fs.h | 16 +++++++++++++++- fs/f2fs/file.c | 8 ++++---- fs/f2fs/gc.c | 10 +++++----- fs/f2fs/node.c | 2 +- fs/f2fs/super.c | 1 + 8 files changed, 30 insertions(+), 13 deletions(-) diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/te= sting/sysfs-fs-f2fs index 94132745ecbe..a34507fbd01f 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -714,6 +714,7 @@ Description: Support configuring fault injection type, = should be FAULT_DQUOT_INIT 0x000010000 FAULT_LOCK_OP 0x000020000 FAULT_BLKADDR 0x000040000 + FAULT_LOCK 0x000080000 =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D =20 What: /sys/fs/f2fs//discard_io_aware_gran diff --git a/Documentation/filesystems/f2fs.rst b/Documentation/filesystems= /f2fs.rst index 2055e72871fe..a81c896464ff 100644 --- a/Documentation/filesystems/f2fs.rst +++ b/Documentation/filesystems/f2fs.rst @@ -206,6 +206,7 @@ fault_type=3D%d Support configuring fault injection t= ype, should be FAULT_DQUOT_INIT 0x000010000 FAULT_LOCK_OP 0x000020000 FAULT_BLKADDR 0x000040000 + FAULT_LOCK 0x000080000 =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D mode=3D%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 1369ec892a2c..93cee10d3244 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -372,7 +372,7 @@ static int f2fs_write_meta_pages(struct address_space *= mapping, goto skip_write; =20 /* if locked failed, cp will flush dirty pages instead */ - if (!f2fs_down_write_trylock(&sbi->cp_global_sem)) + if (!f2fs_down_write_trylock(sbi, &sbi->cp_global_sem)) goto skip_write; =20 trace_f2fs_writepages(mapping->host, wbc, META); @@ -1182,7 +1182,7 @@ static bool __need_flush_quota(struct f2fs_sb_info *s= bi) if (!is_journalled_quota(sbi)) return false; =20 - if (!f2fs_down_write_trylock(&sbi->quota_sem)) + if (!f2fs_down_write_trylock(sbi, &sbi->quota_sem)) return true; if (is_sbi_flag_set(sbi, SBI_QUOTA_SKIP_FLUSH)) { ret =3D false; diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 21596e0266ba..462e478528e2 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_LOCK, FAULT_MAX, }; =20 @@ -2207,8 +2208,21 @@ static inline void f2fs_down_write(struct f2fs_rwsem= *sem) down_write(&sem->internal_rwsem); } =20 -static inline int f2fs_down_write_trylock(struct f2fs_rwsem *sem) +#ifdef CONFIG_F2FS_FAULT_INJECTION +#define f2fs_down_write_trylock(sbi, sem) __f2fs_down_write_trylock(sbi, s= em) + +static inline int __f2fs_down_write_trylock(struct f2fs_sb_info *sbi, + struct f2fs_rwsem *sem) +{ + if (time_to_inject(sbi, FAULT_LOCK)) + return 0; +#else +#define f2fs_down_write_trylock(sbi, sem) __f2fs_down_write_trylock(sem) + +static inline int __f2fs_down_write_trylock(struct f2fs_rwsem *sem) { +#endif + return down_write_trylock(&sem->internal_rwsem); } =20 diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index ca1720fc1187..4fa9a5468e61 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -2462,7 +2462,7 @@ static int f2fs_ioc_gc(struct file *filp, unsigned lo= ng arg) return ret; =20 if (!sync) { - if (!f2fs_down_write_trylock(&sbi->gc_lock)) { + if (!f2fs_down_write_trylock(sbi, &sbi->gc_lock)) { ret =3D -EBUSY; goto out; } @@ -2506,7 +2506,7 @@ static int __f2fs_ioc_gc_range(struct file *filp, str= uct f2fs_gc_range *range) =20 do_more: if (!range->sync) { - if (!f2fs_down_write_trylock(&sbi->gc_lock)) { + if (!f2fs_down_write_trylock(sbi, &sbi->gc_lock)) { ret =3D -EBUSY; goto out; } @@ -2851,7 +2851,7 @@ static int f2fs_move_file_range(struct file *file_in,= loff_t pos_in, f2fs_down_write(&F2FS_I(src)->i_gc_rwsem[WRITE]); if (src !=3D dst) { ret =3D -EBUSY; - if (!f2fs_down_write_trylock(&F2FS_I(dst)->i_gc_rwsem[WRITE])) + if (!f2fs_down_write_trylock(sbi, &F2FS_I(dst)->i_gc_rwsem[WRITE])) goto out_src; } =20 @@ -2971,7 +2971,7 @@ static int f2fs_ioc_flush_device(struct file *filp, u= nsigned long arg) end_segno =3D min(start_segno + range.segments, dev_end_segno); =20 while (start_segno < end_segno) { - if (!f2fs_down_write_trylock(&sbi->gc_lock)) { + if (!f2fs_down_write_trylock(sbi, &sbi->gc_lock)) { ret =3D -EBUSY; goto out; } diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index 0a9dfa459860..8f4c99741f03 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -104,7 +104,7 @@ static int gc_thread_func(void *data) if (foreground) { f2fs_down_write(&sbi->gc_lock); goto do_gc; - } else if (!f2fs_down_write_trylock(&sbi->gc_lock)) { + } else if (!f2fs_down_write_trylock(sbi, &sbi->gc_lock)) { stat_other_skip_bggc_count(sbi); goto next; } @@ -1546,7 +1546,7 @@ static int gc_data_segment(struct f2fs_sb_info *sbi, = struct f2fs_summary *sum, return submitted; } =20 - if (!f2fs_down_write_trylock( + if (!f2fs_down_write_trylock(sbi, &F2FS_I(inode)->i_gc_rwsem[WRITE])) { iput(inode); sbi->skipped_gc_rwsem++; @@ -1589,11 +1589,11 @@ static int gc_data_segment(struct f2fs_sb_info *sbi= , struct f2fs_summary *sum, int err; =20 if (S_ISREG(inode->i_mode)) { - if (!f2fs_down_write_trylock(&fi->i_gc_rwsem[READ])) { + if (!f2fs_down_write_trylock(sbi, &fi->i_gc_rwsem[READ])) { sbi->skipped_gc_rwsem++; continue; } - if (!f2fs_down_write_trylock( + if (!f2fs_down_write_trylock(sbi, &fi->i_gc_rwsem[WRITE])) { sbi->skipped_gc_rwsem++; f2fs_up_write(&fi->i_gc_rwsem[READ]); @@ -2113,7 +2113,7 @@ int f2fs_resize_fs(struct f2fs_sb_info *sbi, __u64 bl= ock_count) secs =3D div_u64(shrunk_blocks, BLKS_PER_SEC(sbi)); =20 /* stop other GC */ - if (!f2fs_down_write_trylock(&sbi->gc_lock)) + if (!f2fs_down_write_trylock(sbi, &sbi->gc_lock)) return -EAGAIN; =20 /* stop CP to protect MAIN_SEC in free_segment_range */ diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index 19a1fee88a36..e35cbf0fc56b 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -517,7 +517,7 @@ int f2fs_try_to_free_nats(struct f2fs_sb_info *sbi, int= nr_shrink) struct f2fs_nm_info *nm_i =3D NM_I(sbi); int nr =3D nr_shrink; =20 - if (!f2fs_down_write_trylock(&nm_i->nat_tree_lock)) + if (!f2fs_down_write_trylock(sbi, &nm_i->nat_tree_lock)) return 0; =20 spin_lock(&nm_i->nat_list_lock); diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index aa55dc12aff2..33a315795deb 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -62,6 +62,7 @@ const char *f2fs_fault_name[FAULT_MAX] =3D { [FAULT_DQUOT_INIT] =3D "dquot initialize", [FAULT_LOCK_OP] =3D "lock_op", [FAULT_BLKADDR] =3D "invalid blkaddr", + [FAULT_LOCK] =3D "lock", }; =20 void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate, --=20 2.25.1