ext4: add debugging trigger for ext4_error() (2c0544b2) · Commits · 戴 / test

fs/ext4/ext4.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -1197,6 +1197,7 @@ struct ext4_sb_info {
		struct proc_dir_entry *s_proc;
		struct kobject s_kobj;
		struct completion s_kobj_unregister;
		struct super_block *s_sb;

		/* Journaling */
		struct journal_s *s_journal;

+20 −0

Original line number	Diff line number	Diff line
		@@ -2473,6 +2473,23 @@ static ssize_t sbi_ui_store(struct ext4_attr *a,
		return count;
		}

		static ssize_t trigger_test_error(struct ext4_attr *a,
		struct ext4_sb_info *sbi,
		const char *buf, size_t count)
		{
		int len = count;

		if (!capable(CAP_SYS_ADMIN))
		return -EPERM;

		if (len && buf[len-1] == '\n')
		len--;

		if (len)
		ext4_error(sbi->s_sb, "%.*s", len, buf);
		return count;
		}

		#define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \
		static struct ext4_attr ext4_attr_##_name = { \
		.attr = {.name = __stringify(_name), .mode = _mode }, \
		@@ -2503,6 +2520,7 @@ EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs);
		EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request);
		EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc);
		EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump);
		EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error);

		static struct attribute *ext4_attrs[] = {
		ATTR_LIST(delayed_allocation_blocks),
		@@ -2517,6 +2535,7 @@ static struct attribute *ext4_attrs[] = {
		ATTR_LIST(mb_stream_req),
		ATTR_LIST(mb_group_prealloc),
		ATTR_LIST(max_writeback_mb_bump),
		ATTR_LIST(trigger_fs_error),
		NULL,
		};

		@@ -3087,6 +3106,7 @@ static int ext4_fill_super(struct super_block sb, void data, int silent)
		goto out_free_orig;
		}
		sb->s_fs_info = sbi;
		sbi->s_sb = sb;
		sbi->s_mount_opt = 0;
		sbi->s_resuid = EXT4_DEF_RESUID;
		sbi->s_resgid = EXT4_DEF_RESGID;