ext4: Once a day, printk file system error information to dmesg
This allows us to grab any file system error messages by scraping /var/log/messages. This will make it easy for us to do error analysis across the very large number of machines as we deploy ext4 across the fleet. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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1c13d5c087
Коммит
66e61a9e95
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@ -1166,6 +1166,9 @@ struct ext4_sb_info {
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/* workqueue for dio unwritten */
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struct workqueue_struct *dio_unwritten_wq;
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/* timer for periodic error stats printing */
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struct timer_list s_err_report;
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};
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static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb)
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@ -325,6 +325,12 @@ static void __save_error_info(struct super_block *sb, const char *func,
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es->s_first_error_ino = es->s_last_error_ino;
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es->s_first_error_block = es->s_last_error_block;
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}
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/*
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* Start the daily error reporting function if it hasn't been
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* started already
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*/
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if (!es->s_error_count)
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mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ);
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es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1);
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}
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@ -2480,6 +2486,53 @@ static int ext4_feature_set_ok(struct super_block *sb, int readonly)
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return 1;
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}
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/*
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* This function is called once a day if we have errors logged
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* on the file system
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*/
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static void print_daily_error_info(unsigned long arg)
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{
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struct super_block *sb = (struct super_block *) arg;
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struct ext4_sb_info *sbi;
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struct ext4_super_block *es;
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sbi = EXT4_SB(sb);
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es = sbi->s_es;
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if (es->s_error_count)
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ext4_msg(sb, KERN_NOTICE, "error count: %u",
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le32_to_cpu(es->s_error_count));
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if (es->s_first_error_time) {
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printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d",
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sb->s_id, le32_to_cpu(es->s_first_error_time),
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(int) sizeof(es->s_first_error_func),
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es->s_first_error_func,
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le32_to_cpu(es->s_first_error_line));
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if (es->s_first_error_ino)
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printk(": inode %u",
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le32_to_cpu(es->s_first_error_ino));
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if (es->s_first_error_block)
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printk(": block %llu", (unsigned long long)
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le64_to_cpu(es->s_first_error_block));
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printk("\n");
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}
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if (es->s_last_error_time) {
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printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d",
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sb->s_id, le32_to_cpu(es->s_last_error_time),
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(int) sizeof(es->s_last_error_func),
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es->s_last_error_func,
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le32_to_cpu(es->s_last_error_line));
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if (es->s_last_error_ino)
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printk(": inode %u",
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le32_to_cpu(es->s_last_error_ino));
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if (es->s_last_error_block)
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printk(": block %llu", (unsigned long long)
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le64_to_cpu(es->s_last_error_block));
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printk("\n");
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}
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mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */
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}
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static int ext4_fill_super(struct super_block *sb, void *data, int silent)
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__releases(kernel_lock)
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__acquires(kernel_lock)
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@ -3083,6 +3136,12 @@ no_journal:
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ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. "
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"Opts: %s", descr, orig_data);
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init_timer(&sbi->s_err_report);
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sbi->s_err_report.function = print_daily_error_info;
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sbi->s_err_report.data = (unsigned long) sb;
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if (es->s_error_count)
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mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */
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lock_kernel();
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kfree(orig_data);
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return 0;
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