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author | Theodore Ts'o <tytso@mit.edu> | 2019-12-23 18:44:49 -0500 |
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committer | Theodore Ts'o <tytso@mit.edu> | 2019-12-26 11:29:10 -0500 |
commit | 4549b49f82ab40c214778f316b6898aa4132723a (patch) | |
tree | fc799e33431f444e06f625237ac66f3dff368dcb /fs/ext4 | |
parent | 46f870d690fecc792a66730dcbbf0aa109f5f9ab (diff) | |
download | linux-4549b49f82ab40c214778f316b6898aa4132723a.tar.bz2 |
ext4: export information about first/last errors via /sys/fs/ext4/<dev>
Make {first,last}_error_{ino,block,line,func,errcode} available via
sysfs.
Also add a missing newline for {first,last}_error_time.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
-rw-r--r-- | fs/ext4/sysfs.c | 65 |
1 files changed, 64 insertions, 1 deletions
diff --git a/fs/ext4/sysfs.c b/fs/ext4/sysfs.c index a990d28d191b..d218ebdafa4a 100644 --- a/fs/ext4/sysfs.c +++ b/fs/ext4/sysfs.c @@ -30,6 +30,9 @@ typedef enum { attr_feature, attr_pointer_ui, attr_pointer_ul, + attr_pointer_u64, + attr_pointer_u8, + attr_pointer_string, attr_pointer_atomic, attr_journal_task, } attr_id_t; @@ -47,6 +50,7 @@ struct ext4_attr { struct attribute attr; short attr_id; short attr_ptr; + unsigned short attr_size; union { int offset; void *explicit_ptr; @@ -155,9 +159,29 @@ static struct ext4_attr ext4_attr_##_name = { \ }, \ } +#define EXT4_ATTR_STRING(_name,_mode,_size,_struct,_elname) \ +static struct ext4_attr ext4_attr_##_name = { \ + .attr = {.name = __stringify(_name), .mode = _mode }, \ + .attr_id = attr_pointer_string, \ + .attr_size = _size, \ + .attr_ptr = ptr_##_struct##_offset, \ + .u = { \ + .offset = offsetof(struct _struct, _elname),\ + }, \ +} + #define EXT4_RO_ATTR_ES_UI(_name,_elname) \ EXT4_ATTR_OFFSET(_name, 0444, pointer_ui, ext4_super_block, _elname) +#define EXT4_RO_ATTR_ES_U8(_name,_elname) \ + EXT4_ATTR_OFFSET(_name, 0444, pointer_u8, ext4_super_block, _elname) + +#define EXT4_RO_ATTR_ES_U64(_name,_elname) \ + EXT4_ATTR_OFFSET(_name, 0444, pointer_u64, ext4_super_block, _elname) + +#define EXT4_RO_ATTR_ES_STRING(_name,_elname,_size) \ + EXT4_ATTR_STRING(_name, 0444, _size, ext4_super_block, _elname) + #define EXT4_RW_ATTR_SBI_UI(_name,_elname) \ EXT4_ATTR_OFFSET(_name, 0644, pointer_ui, ext4_sb_info, _elname) @@ -202,6 +226,16 @@ EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst); EXT4_RW_ATTR_SBI_UL(simulate_fail, s_simulate_fail); #endif EXT4_RO_ATTR_ES_UI(errors_count, s_error_count); +EXT4_RO_ATTR_ES_U8(first_error_errcode, s_first_error_errcode); +EXT4_RO_ATTR_ES_U8(last_error_errcode, s_last_error_errcode); +EXT4_RO_ATTR_ES_UI(first_error_ino, s_first_error_ino); +EXT4_RO_ATTR_ES_UI(last_error_ino, s_last_error_ino); +EXT4_RO_ATTR_ES_U64(first_error_block, s_first_error_block); +EXT4_RO_ATTR_ES_U64(last_error_block, s_last_error_block); +EXT4_RO_ATTR_ES_UI(first_error_line, s_first_error_line); +EXT4_RO_ATTR_ES_UI(last_error_line, s_last_error_line); +EXT4_RO_ATTR_ES_STRING(first_error_func, s_first_error_func, 32); +EXT4_RO_ATTR_ES_STRING(last_error_func, s_last_error_func, 32); EXT4_ATTR(first_error_time, 0444, first_error_time); EXT4_ATTR(last_error_time, 0444, last_error_time); EXT4_ATTR(journal_task, 0444, journal_task); @@ -232,6 +266,16 @@ static struct attribute *ext4_attrs[] = { ATTR_LIST(msg_ratelimit_interval_ms), ATTR_LIST(msg_ratelimit_burst), ATTR_LIST(errors_count), + ATTR_LIST(first_error_ino), + ATTR_LIST(last_error_ino), + ATTR_LIST(first_error_block), + ATTR_LIST(last_error_block), + ATTR_LIST(first_error_line), + ATTR_LIST(last_error_line), + ATTR_LIST(first_error_func), + ATTR_LIST(last_error_func), + ATTR_LIST(first_error_errcode), + ATTR_LIST(last_error_errcode), ATTR_LIST(first_error_time), ATTR_LIST(last_error_time), ATTR_LIST(journal_task), @@ -290,7 +334,7 @@ static void *calc_ptr(struct ext4_attr *a, struct ext4_sb_info *sbi) static ssize_t __print_tstamp(char *buf, __le32 lo, __u8 hi) { - return snprintf(buf, PAGE_SIZE, "%lld", + return snprintf(buf, PAGE_SIZE, "%lld\n", ((time64_t)hi << 32) + le32_to_cpu(lo)); } @@ -333,6 +377,25 @@ static ssize_t ext4_attr_show(struct kobject *kobj, return 0; return snprintf(buf, PAGE_SIZE, "%lu\n", *((unsigned long *) ptr)); + case attr_pointer_u8: + if (!ptr) + return 0; + return snprintf(buf, PAGE_SIZE, "%u\n", + *((unsigned char *) ptr)); + case attr_pointer_u64: + if (!ptr) + return 0; + if (a->attr_ptr == ptr_ext4_super_block_offset) + return snprintf(buf, PAGE_SIZE, "%llu\n", + le64_to_cpup(ptr)); + else + return snprintf(buf, PAGE_SIZE, "%llu\n", + *((unsigned long long *) ptr)); + case attr_pointer_string: + if (!ptr) + return 0; + return snprintf(buf, PAGE_SIZE, "%.*s\n", a->attr_size, + (char *) ptr); case attr_pointer_atomic: if (!ptr) return 0; |