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| author | Theodore Ts'o <tytso@mit.edu> | 2019-11-21 21:09:43 +0300 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2019-12-26 19:28:31 +0300 |
| commit | 46f870d690fecc792a66730dcbbf0aa109f5f9ab (patch) | |
| tree | 0e517f47ca1c5073481e0d8bfc8631f24388dbca /fs/ext4/sysfs.c | |
| parent | 878520ac45f9f698432d4276db3d9144b83931b6 (diff) | |
| download | linux-46f870d690fecc792a66730dcbbf0aa109f5f9ab.tar.xz | |
ext4: simulate various I/O and checksum errors when reading metadata
This allows us to test various error handling code paths
Link: https://lore.kernel.org/r/20191209012317.59398-1-tytso@mit.edu
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/sysfs.c')
| -rw-r--r-- | fs/ext4/sysfs.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/fs/ext4/sysfs.c b/fs/ext4/sysfs.c index eb1efad0e20a..a990d28d191b 100644 --- a/fs/ext4/sysfs.c +++ b/fs/ext4/sysfs.c @@ -29,6 +29,7 @@ typedef enum { attr_last_error_time, attr_feature, attr_pointer_ui, + attr_pointer_ul, attr_pointer_atomic, attr_journal_task, } attr_id_t; @@ -160,6 +161,9 @@ static struct ext4_attr ext4_attr_##_name = { \ #define EXT4_RW_ATTR_SBI_UI(_name,_elname) \ EXT4_ATTR_OFFSET(_name, 0644, pointer_ui, ext4_sb_info, _elname) +#define EXT4_RW_ATTR_SBI_UL(_name,_elname) \ + EXT4_ATTR_OFFSET(_name, 0644, pointer_ul, ext4_sb_info, _elname) + #define EXT4_ATTR_PTR(_name,_mode,_id,_ptr) \ static struct ext4_attr ext4_attr_##_name = { \ .attr = {.name = __stringify(_name), .mode = _mode }, \ @@ -194,6 +198,9 @@ 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_ES_UI(errors_count, s_error_count); EXT4_ATTR(first_error_time, 0444, first_error_time); EXT4_ATTR(last_error_time, 0444, last_error_time); @@ -228,6 +235,9 @@ 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 NULL, }; ATTRIBUTE_GROUPS(ext4); @@ -318,6 +328,11 @@ static ssize_t ext4_attr_show(struct kobject *kobj, else return snprintf(buf, PAGE_SIZE, "%u\n", *((unsigned int *) ptr)); + case attr_pointer_ul: + if (!ptr) + return 0; + return snprintf(buf, PAGE_SIZE, "%lu\n", + *((unsigned long *) ptr)); case attr_pointer_atomic: if (!ptr) return 0; @@ -361,6 +376,14 @@ static ssize_t ext4_attr_store(struct kobject *kobj, else *((unsigned int *) ptr) = t; return len; + case attr_pointer_ul: + if (!ptr) + return 0; + ret = kstrtoul(skip_spaces(buf), 0, &t); + if (ret) + return ret; + *((unsigned long *) ptr) = t; + return len; case attr_inode_readahead: return inode_readahead_blks_store(sbi, buf, len); case attr_trigger_test_error: |