* [PATCH] debugfs/logdump.c: Add parameter t to dump sequence commit timestamps
@ 2025-06-17 11:31 zhanchengbin
2025-06-30 15:10 ` Darrick J. Wong
0 siblings, 1 reply; 4+ messages in thread
From: zhanchengbin @ 2025-06-17 11:31 UTC (permalink / raw)
To: Theodore Ts'o; +Cc: linux-ext4, qiangxiaojun, hejie3
When filesystem errors occur, inspect journal sequences with parameter t to
dump commit timestamps.
Signed-off-by: zhanchengbin <zhanchengbin@huawei.com>
---
debugfs/logdump.c | 63 ++++++++++++++++++++++++++++++++++++++++-------
1 file changed, 54 insertions(+), 9 deletions(-)
diff --git a/debugfs/logdump.c b/debugfs/logdump.c
index 324ed42..bbe1384 100644
--- a/debugfs/logdump.c
+++ b/debugfs/logdump.c
@@ -47,7 +47,7 @@ enum journal_location {JOURNAL_IS_INTERNAL,
JOURNAL_IS_EXTERNAL};
#define ANY_BLOCK ((blk64_t) -1)
-static int dump_all, dump_super, dump_old, dump_contents,
dump_descriptors;
+static int dump_all, dump_super, dump_old, dump_contents,
dump_descriptors, dump_time;
static int64_t dump_counts;
static blk64_t block_to_dump, bitmap_to_dump, inode_block_to_dump;
static unsigned int group_to_dump, inode_offset_to_dump;
@@ -67,6 +67,8 @@ static void dump_descriptor_block(FILE *, struct
journal_source *,
char *, journal_superblock_t *,
unsigned int *, unsigned int, __u32, tid_t);
+static void dump_commit_time(FILE *out_file, char *buf);
+
static void dump_revoke_block(FILE *, char *, journal_superblock_t *,
unsigned int, unsigned int, tid_t);
@@ -118,10 +120,11 @@ void do_logdump(int argc, ss_argv_t argv, int
sci_idx EXT2FS_ATTR((unused)),
inode_block_to_dump = ANY_BLOCK;
inode_to_dump = -1;
dump_counts = -1;
+ dump_time = 0;
wrapped_flag = false;
reset_getopt();
- while ((c = getopt (argc, argv, "ab:ci:f:OsSn:")) != EOF) {
+ while ((c = getopt (argc, argv, "ab:ci:f:OsSn:t")) != EOF) {
switch (c) {
case 'a':
dump_all++;
@@ -162,6 +165,9 @@ void do_logdump(int argc, ss_argv_t argv, int
sci_idx EXT2FS_ATTR((unused)),
return;
}
break;
+ case 't':
+ dump_time++;
+ break;
default:
goto print_usage;
}
@@ -521,21 +527,33 @@ static void dump_journal(char *cmdname, FILE
*out_file,
break;
}
- if (dump_descriptors) {
- fprintf (out_file, "Found expected sequence %u, "
- "type %u (%s) at block %u\n",
- sequence, blocktype,
- type_to_name(blocktype), blocknr);
- }
-
switch (blocktype) {
case JBD2_DESCRIPTOR_BLOCK:
+ if (dump_descriptors) {
+ fprintf (out_file, "Found expected sequence %u, "
+ "type %u (%s) at block %u\n",
+ sequence, blocktype,
+ type_to_name(blocktype), blocknr);
+ }
+
dump_descriptor_block(out_file, source, buf, jsb,
&blocknr, blocksize, maxlen,
transaction);
continue;
case JBD2_COMMIT_BLOCK:
+ if (dump_descriptors) {
+ fprintf (out_file, "Found expected sequence %u, "
+ "type %u (%s) at block %u",
+ sequence, blocktype,
+ type_to_name(blocktype), blocknr);
+ }
+
+ if (dump_time)
+ dump_commit_time(out_file, buf);
+
+ fprintf(out_file, "\n");
+
cur_counts++;
transaction++;
blocknr++;
@@ -543,6 +561,13 @@ static void dump_journal(char *cmdname, FILE *out_file,
continue;
case JBD2_REVOKE_BLOCK:
+ if (dump_descriptors) {
+ fprintf (out_file, "Found expected sequence %u, "
+ "type %u (%s) at block %u\n",
+ sequence, blocktype,
+ type_to_name(blocktype), blocknr);
+ }
+
dump_revoke_block(out_file, buf, jsb,
blocknr, blocksize,
transaction);
@@ -742,6 +767,26 @@ static void dump_descriptor_block(FILE *out_file,
*blockp = blocknr;
}
+static void dump_commit_time(FILE *out_file, char *buf)
+{
+ struct commit_header *header;
+ __be64 commit_sec;
+ time_t timestamp;
+ struct tm timeinfo;
+
+ header = (struct commit_header*)buf;
+ commit_sec = be64_to_cpu(header->h_commit_sec);
+
+ timestamp = commit_sec;
+ gmtime_r(×tamp, &timeinfo);
+ fprintf(out_file, ", commit at UTC: %04d-%02d-%02d %02d:%02d:%02d",
+ timeinfo.tm_year + 1900,
+ timeinfo.tm_mon + 1,
+ timeinfo.tm_mday,
+ timeinfo.tm_hour,
+ timeinfo.tm_min,
+ timeinfo.tm_sec);
+}
static void dump_revoke_block(FILE *out_file, char *buf,
journal_superblock_t *jsb EXT2FS_ATTR((unused)),
--
2.33.0
^ permalink raw reply related [flat|nested] 4+ messages in thread* Re: [PATCH] debugfs/logdump.c: Add parameter t to dump sequence commit timestamps
2025-06-17 11:31 [PATCH] debugfs/logdump.c: Add parameter t to dump sequence commit timestamps zhanchengbin
@ 2025-06-30 15:10 ` Darrick J. Wong
2025-07-01 3:21 ` zhanchengbin
2025-07-01 9:31 ` zhanchengbin
0 siblings, 2 replies; 4+ messages in thread
From: Darrick J. Wong @ 2025-06-30 15:10 UTC (permalink / raw)
To: zhanchengbin; +Cc: Theodore Ts'o, linux-ext4, qiangxiaojun, hejie3
On Tue, Jun 17, 2025 at 07:31:35PM +0800, zhanchengbin wrote:
> When filesystem errors occur, inspect journal sequences with parameter t to
> dump commit timestamps.
>
> Signed-off-by: zhanchengbin <zhanchengbin@huawei.com>
> ---
> debugfs/logdump.c | 63 ++++++++++++++++++++++++++++++++++++++++-------
> 1 file changed, 54 insertions(+), 9 deletions(-)
>
> diff --git a/debugfs/logdump.c b/debugfs/logdump.c
> index 324ed42..bbe1384 100644
> --- a/debugfs/logdump.c
> +++ b/debugfs/logdump.c
> @@ -47,7 +47,7 @@ enum journal_location {JOURNAL_IS_INTERNAL,
> JOURNAL_IS_EXTERNAL};
>
> #define ANY_BLOCK ((blk64_t) -1)
>
> -static int dump_all, dump_super, dump_old, dump_contents,
> dump_descriptors;
> +static int dump_all, dump_super, dump_old, dump_contents,
> dump_descriptors, dump_time;
> static int64_t dump_counts;
> static blk64_t block_to_dump, bitmap_to_dump, inode_block_to_dump;
> static unsigned int group_to_dump, inode_offset_to_dump;
> @@ -67,6 +67,8 @@ static void dump_descriptor_block(FILE *, struct
> journal_source *,
> char *, journal_superblock_t *,
> unsigned int *, unsigned int, __u32, tid_t);
>
> +static void dump_commit_time(FILE *out_file, char *buf);
> +
> static void dump_revoke_block(FILE *, char *, journal_superblock_t *,
> unsigned int, unsigned int, tid_t);
>
> @@ -118,10 +120,11 @@ void do_logdump(int argc, ss_argv_t argv, int sci_idx
> EXT2FS_ATTR((unused)),
> inode_block_to_dump = ANY_BLOCK;
> inode_to_dump = -1;
> dump_counts = -1;
> + dump_time = 0;
Globals are initialized to zero if not given an explicit value so this
isn't necessary.
> wrapped_flag = false;
>
> reset_getopt();
> - while ((c = getopt (argc, argv, "ab:ci:f:OsSn:")) != EOF) {
> + while ((c = getopt (argc, argv, "ab:ci:f:OsSn:t")) != EOF) {
> switch (c) {
> case 'a':
> dump_all++;
> @@ -162,6 +165,9 @@ void do_logdump(int argc, ss_argv_t argv, int sci_idx
> EXT2FS_ATTR((unused)),
> return;
> }
> break;
> + case 't':
> + dump_time++;
> + break;
> default:
> goto print_usage;
> }
> @@ -521,21 +527,33 @@ static void dump_journal(char *cmdname, FILE
> *out_file,
> break;
> }
>
> - if (dump_descriptors) {
> - fprintf (out_file, "Found expected sequence %u, "
> - "type %u (%s) at block %u\n",
> - sequence, blocktype,
> - type_to_name(blocktype), blocknr);
> - }
> -
> switch (blocktype) {
> case JBD2_DESCRIPTOR_BLOCK:
> + if (dump_descriptors) {
> + fprintf (out_file, "Found expected sequence %u, "
> + "type %u (%s) at block %u\n",
> + sequence, blocktype,
> + type_to_name(blocktype), blocknr);
> + }
> +
> dump_descriptor_block(out_file, source, buf, jsb,
> &blocknr, blocksize, maxlen,
> transaction);
> continue;
>
> case JBD2_COMMIT_BLOCK:
> + if (dump_descriptors) {
> + fprintf (out_file, "Found expected sequence %u, "
> + "type %u (%s) at block %u",
> + sequence, blocktype,
> + type_to_name(blocktype), blocknr);
> + }
Why did the "Found expected sequence..." message get moved?
> +
> + if (dump_time)
> + dump_commit_time(out_file, buf);
> +
> + fprintf(out_file, "\n");
> +
> cur_counts++;
> transaction++;
> blocknr++;
> @@ -543,6 +561,13 @@ static void dump_journal(char *cmdname, FILE *out_file,
> continue;
>
> case JBD2_REVOKE_BLOCK:
> + if (dump_descriptors) {
> + fprintf (out_file, "Found expected sequence %u, "
> + "type %u (%s) at block %u\n",
> + sequence, blocktype,
> + type_to_name(blocktype), blocknr);
> + }
> +
> dump_revoke_block(out_file, buf, jsb,
> blocknr, blocksize,
> transaction);
> @@ -742,6 +767,26 @@ static void dump_descriptor_block(FILE *out_file,
> *blockp = blocknr;
> }
>
> +static void dump_commit_time(FILE *out_file, char *buf)
> +{
> + struct commit_header *header;
> + __be64 commit_sec;
> + time_t timestamp;
> + struct tm timeinfo;
> +
> + header = (struct commit_header*)buf;
> + commit_sec = be64_to_cpu(header->h_commit_sec);
> +
> + timestamp = commit_sec;
> + gmtime_r(×tamp, &timeinfo);
> + fprintf(out_file, ", commit at UTC: %04d-%02d-%02d %02d:%02d:%02d",
> + timeinfo.tm_year + 1900,
> + timeinfo.tm_mon + 1,
> + timeinfo.tm_mday,
> + timeinfo.tm_hour,
> + timeinfo.tm_min,
> + timeinfo.tm_sec);
Use ctime_r() to get a locale-appropriate local timestamp string to
print out. Or asctime_r() if you really need UTC.
--D
> +}
>
> static void dump_revoke_block(FILE *out_file, char *buf,
> journal_superblock_t *jsb EXT2FS_ATTR((unused)),
> --
> 2.33.0
>
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH] debugfs/logdump.c: Add parameter t to dump sequence commit timestamps
2025-06-30 15:10 ` Darrick J. Wong
@ 2025-07-01 3:21 ` zhanchengbin
2025-07-01 9:31 ` zhanchengbin
1 sibling, 0 replies; 4+ messages in thread
From: zhanchengbin @ 2025-07-01 3:21 UTC (permalink / raw)
To: Darrick J. Wong; +Cc: Theodore Ts'o, linux-ext4, qiangxiaojun, hejie3
On 2025/6/30 23:10, Darrick J. Wong wrote:
> On Tue, Jun 17, 2025 at 07:31:35PM +0800, zhanchengbin wrote:
>> When filesystem errors occur, inspect journal sequences with parameter t to
>> dump commit timestamps.
>>
>> Signed-off-by: zhanchengbin <zhanchengbin@huawei.com>
>> ---
>> debugfs/logdump.c | 63 ++++++++++++++++++++++++++++++++++++++++-------
>> 1 file changed, 54 insertions(+), 9 deletions(-)
>>
>> diff --git a/debugfs/logdump.c b/debugfs/logdump.c
>> index 324ed42..bbe1384 100644
>> --- a/debugfs/logdump.c
>> +++ b/debugfs/logdump.c
>> @@ -47,7 +47,7 @@ enum journal_location {JOURNAL_IS_INTERNAL,
>> JOURNAL_IS_EXTERNAL};
>>
>> #define ANY_BLOCK ((blk64_t) -1)
>>
>> -static int dump_all, dump_super, dump_old, dump_contents,
>> dump_descriptors;
>> +static int dump_all, dump_super, dump_old, dump_contents,
>> dump_descriptors, dump_time;
>> static int64_t dump_counts;
>> static blk64_t block_to_dump, bitmap_to_dump, inode_block_to_dump;
>> static unsigned int group_to_dump, inode_offset_to_dump;
>> @@ -67,6 +67,8 @@ static void dump_descriptor_block(FILE *, struct
>> journal_source *,
>> char *, journal_superblock_t *,
>> unsigned int *, unsigned int, __u32, tid_t);
>>
>> +static void dump_commit_time(FILE *out_file, char *buf);
>> +
>> static void dump_revoke_block(FILE *, char *, journal_superblock_t *,
>> unsigned int, unsigned int, tid_t);
>>
>> @@ -118,10 +120,11 @@ void do_logdump(int argc, ss_argv_t argv, int sci_idx
>> EXT2FS_ATTR((unused)),
>> inode_block_to_dump = ANY_BLOCK;
>> inode_to_dump = -1;
>> dump_counts = -1;
>> + dump_time = 0;
>
> Globals are initialized to zero if not given an explicit value so this
> isn't necessary.
Okay.
>
>> wrapped_flag = false;
>>
>> reset_getopt();
>> - while ((c = getopt (argc, argv, "ab:ci:f:OsSn:")) != EOF) {
>> + while ((c = getopt (argc, argv, "ab:ci:f:OsSn:t")) != EOF) {
>> switch (c) {
>> case 'a':
>> dump_all++;
>> @@ -162,6 +165,9 @@ void do_logdump(int argc, ss_argv_t argv, int sci_idx
>> EXT2FS_ATTR((unused)),
>> return;
>> }
>> break;
>> + case 't':
>> + dump_time++;
>> + break;
>> default:
>> goto print_usage;
>> }
>> @@ -521,21 +527,33 @@ static void dump_journal(char *cmdname, FILE
>> *out_file,
>> break;
>> }
>>
>> - if (dump_descriptors) {
>> - fprintf (out_file, "Found expected sequence %u, "
>> - "type %u (%s) at block %u\n",
>> - sequence, blocktype,
>> - type_to_name(blocktype), blocknr);
>> - }
>> -
>> switch (blocktype) {
>> case JBD2_DESCRIPTOR_BLOCK:
>> + if (dump_descriptors) {
>> + fprintf (out_file, "Found expected sequence %u, "
>> + "type %u (%s) at block %u\n",
>> + sequence, blocktype,
>> + type_to_name(blocktype), blocknr);
>> + }
>> +
>> dump_descriptor_block(out_file, source, buf, jsb,
>> &blocknr, blocksize, maxlen,
>> transaction);
>> continue;
>>
>> case JBD2_COMMIT_BLOCK:
>> + if (dump_descriptors) {
>> + fprintf (out_file, "Found expected sequence %u, "
>> + "type %u (%s) at block %u",
>> + sequence, blocktype,
>> + type_to_name(blocktype), blocknr);
>> + }
>
> Why did the "Found expected sequence..." message get moved?
To dump the time after the commit block without a new line.
>
>> +
>> + if (dump_time)
>> + dump_commit_time(out_file, buf);
>> +
>> + fprintf(out_file, "\n");
>> +
>> cur_counts++;
>> transaction++;
>> blocknr++;
>> @@ -543,6 +561,13 @@ static void dump_journal(char *cmdname, FILE *out_file,
>> continue;
>>
>> case JBD2_REVOKE_BLOCK:
>> + if (dump_descriptors) {
>> + fprintf (out_file, "Found expected sequence %u, "
>> + "type %u (%s) at block %u\n",
>> + sequence, blocktype,
>> + type_to_name(blocktype), blocknr);
>> + }
>> +
>> dump_revoke_block(out_file, buf, jsb,
>> blocknr, blocksize,
>> transaction);
>> @@ -742,6 +767,26 @@ static void dump_descriptor_block(FILE *out_file,
>> *blockp = blocknr;
>> }
>>
>> +static void dump_commit_time(FILE *out_file, char *buf)
>> +{
>> + struct commit_header *header;
>> + __be64 commit_sec;
>> + time_t timestamp;
>> + struct tm timeinfo;
>> +
>> + header = (struct commit_header*)buf;
>> + commit_sec = be64_to_cpu(header->h_commit_sec);
>> +
>> + timestamp = commit_sec;
>> + gmtime_r(×tamp, &timeinfo);
>> + fprintf(out_file, ", commit at UTC: %04d-%02d-%02d %02d:%02d:%02d",
>> + timeinfo.tm_year + 1900,
>> + timeinfo.tm_mon + 1,
>> + timeinfo.tm_mday,
>> + timeinfo.tm_hour,
>> + timeinfo.tm_min,
>> + timeinfo.tm_sec);
>
> Use ctime_r() to get a locale-appropriate local timestamp string to
> print out. Or asctime_r() if you really need UTC.
>
> --D
>
I'll try to optimize this and push the patch for the next version.
Thanks,
- bin.
>> +}
>>
>> static void dump_revoke_block(FILE *out_file, char *buf,
>> journal_superblock_t *jsb EXT2FS_ATTR((unused)),
>> --
>> 2.33.0
>>
>
> .
>
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH] debugfs/logdump.c: Add parameter t to dump sequence commit timestamps
2025-06-30 15:10 ` Darrick J. Wong
2025-07-01 3:21 ` zhanchengbin
@ 2025-07-01 9:31 ` zhanchengbin
1 sibling, 0 replies; 4+ messages in thread
From: zhanchengbin @ 2025-07-01 9:31 UTC (permalink / raw)
To: Darrick J. Wong; +Cc: Theodore Ts'o, linux-ext4, qiangxiaojun, hejie3
On 2025/6/30 23:10, Darrick J. Wong wrote:
> On Tue, Jun 17, 2025 at 07:31:35PM +0800, zhanchengbin wrote:
>> When filesystem errors occur, inspect journal sequences with parameter t to
>> dump commit timestamps.
>>
>> Signed-off-by: zhanchengbin <zhanchengbin@huawei.com>
>> ---
>> debugfs/logdump.c | 63 ++++++++++++++++++++++++++++++++++++++++-------
>> 1 file changed, 54 insertions(+), 9 deletions(-)
>>
>> diff --git a/debugfs/logdump.c b/debugfs/logdump.c
>> index 324ed42..bbe1384 100644
>> --- a/debugfs/logdump.c
>> +++ b/debugfs/logdump.c
>> @@ -47,7 +47,7 @@ enum journal_location {JOURNAL_IS_INTERNAL,
>> JOURNAL_IS_EXTERNAL};
>>
>> #define ANY_BLOCK ((blk64_t) -1)
>>
>> -static int dump_all, dump_super, dump_old, dump_contents,
>> dump_descriptors;
>> +static int dump_all, dump_super, dump_old, dump_contents,
>> dump_descriptors, dump_time;
>> static int64_t dump_counts;
>> static blk64_t block_to_dump, bitmap_to_dump, inode_block_to_dump;
>> static unsigned int group_to_dump, inode_offset_to_dump;
>> @@ -67,6 +67,8 @@ static void dump_descriptor_block(FILE *, struct
>> journal_source *,
>> char *, journal_superblock_t *,
>> unsigned int *, unsigned int, __u32, tid_t);
>>
>> +static void dump_commit_time(FILE *out_file, char *buf);
>> +
>> static void dump_revoke_block(FILE *, char *, journal_superblock_t *,
>> unsigned int, unsigned int, tid_t);
>>
>> @@ -118,10 +120,11 @@ void do_logdump(int argc, ss_argv_t argv, int sci_idx
>> EXT2FS_ATTR((unused)),
>> inode_block_to_dump = ANY_BLOCK;
>> inode_to_dump = -1;
>> dump_counts = -1;
>> + dump_time = 0;
>
> Globals are initialized to zero if not given an explicit value so this
> isn't necessary.
When I run 'logdump -t', it displays the time，but when I run 'logdump'
without parameters for the second time, it still shows the time. Globals
retain their assigned values, which affects subsequent execution
results. So I think initializing the globals here is necessary.
Thanks,
- bin.
>
> .
>
^ permalink raw reply [flat|nested] 4+ messages in thread
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2025-06-17 11:31 [PATCH] debugfs/logdump.c: Add parameter t to dump sequence commit timestamps zhanchengbin
2025-06-30 15:10 ` Darrick J. Wong
2025-07-01 3:21 ` zhanchengbin
2025-07-01 9:31 ` zhanchengbin
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