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[2/2] Btrfs-progs: introduce super_journal_tail to inspect-dump-super

Message ID 20170801161439.13426-17-bo.li.liu@oracle.com (mailing list archive)
State New, archived
Headers show

Commit Message

Liu Bo Aug. 1, 2017, 4:14 p.m. UTC 
We've record journal_tail of raid5/6 log in super_block so that recovery
of raid5/6 log can scan from this position.

This teaches inspect-dump-super to acknowledge %journal_tail.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
---
 cmds-inspect-dump-super.c | 2 ++
 ctree.h                   | 6 +++++-
 2 files changed, 7 insertions(+), 1 deletion(-)
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Patch

diff --git a/cmds-inspect-dump-super.c b/cmds-inspect-dump-super.c
index 98e0270..baa4d1a 100644
--- a/cmds-inspect-dump-super.c
+++ b/cmds-inspect-dump-super.c
@@ -389,6 +389,8 @@  static void dump_superblock(struct btrfs_super_block *sb, int full)
 	       (unsigned long long)btrfs_super_log_root_transid(sb));
 	printf("log_root_level\t\t%llu\n",
 	       (unsigned long long)btrfs_super_log_root_level(sb));
+	printf("journal_tail\t\t%llu\n",
+	       (unsigned long long)btrfs_super_journal_tail(sb));
 	printf("total_bytes\t\t%llu\n",
 	       (unsigned long long)btrfs_super_total_bytes(sb));
 	printf("bytes_used\t\t%llu\n",
diff --git a/ctree.h b/ctree.h
index 48ae890..d28d6f7 100644
--- a/ctree.h
+++ b/ctree.h
@@ -458,8 +458,10 @@  struct btrfs_super_block {
 	__le64 cache_generation;
 	__le64 uuid_tree_generation;
 
+	__le64 journal_tail;
+
 	/* future expansion */
-	__le64 reserved[30];
+	__le64 reserved[29];
 	u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
 	struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
 } __attribute__ ((__packed__));
@@ -2143,6 +2145,8 @@  BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
 			 log_root_transid, 64);
 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
 			 log_root_level, 8);
+BTRFS_SETGET_STACK_FUNCS(super_journal_tail, struct btrfs_super_block,
+			 journal_tail, 64);
 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
 			 total_bytes, 64);
 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,