xfs: add log item recovery tracing
Currently there is no tracing in log recovery, so it is difficult to
determine what is going on when something goes wrong.
Add tracing for log item recovery to provide visibility into the log
recovery process. The tracing added shows regions being extracted
from the log transactions and added to the transaction hash forming
recovery items, followed by the reordering, cancelling and finally
recovery of the items.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 22e6efd..f21eb8a 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -1408,6 +1408,7 @@
STATIC int
xlog_recover_add_to_cont_trans(
+ struct log *log,
xlog_recover_t *trans,
xfs_caddr_t dp,
int len)
@@ -1434,6 +1435,7 @@
memcpy(&ptr[old_len], dp, len); /* d, s, l */
item->ri_buf[item->ri_cnt-1].i_len += len;
item->ri_buf[item->ri_cnt-1].i_addr = ptr;
+ trace_xfs_log_recover_item_add_cont(log, trans, item, 0);
return 0;
}
@@ -1452,6 +1454,7 @@
*/
STATIC int
xlog_recover_add_to_trans(
+ struct log *log,
xlog_recover_t *trans,
xfs_caddr_t dp,
int len)
@@ -1510,6 +1513,7 @@
item->ri_buf[item->ri_cnt].i_addr = ptr;
item->ri_buf[item->ri_cnt].i_len = len;
item->ri_cnt++;
+ trace_xfs_log_recover_item_add(log, trans, item, 0);
return 0;
}
@@ -1521,7 +1525,9 @@
*/
STATIC int
xlog_recover_reorder_trans(
- xlog_recover_t *trans)
+ struct log *log,
+ xlog_recover_t *trans,
+ int pass)
{
xlog_recover_item_t *item, *n;
LIST_HEAD(sort_list);
@@ -1535,6 +1541,8 @@
switch (ITEM_TYPE(item)) {
case XFS_LI_BUF:
if (!(buf_f->blf_flags & XFS_BLI_CANCEL)) {
+ trace_xfs_log_recover_item_reorder_head(log,
+ trans, item, pass);
list_move(&item->ri_list, &trans->r_itemq);
break;
}
@@ -1543,6 +1551,8 @@
case XFS_LI_QUOTAOFF:
case XFS_LI_EFD:
case XFS_LI_EFI:
+ trace_xfs_log_recover_item_reorder_tail(log,
+ trans, item, pass);
list_move_tail(&item->ri_list, &trans->r_itemq);
break;
default:
@@ -1592,8 +1602,10 @@
/*
* If this isn't a cancel buffer item, then just return.
*/
- if (!(flags & XFS_BLI_CANCEL))
+ if (!(flags & XFS_BLI_CANCEL)) {
+ trace_xfs_log_recover_buf_not_cancel(log, buf_f);
return;
+ }
/*
* Insert an xfs_buf_cancel record into the hash table of
@@ -1627,6 +1639,7 @@
while (nextp != NULL) {
if (nextp->bc_blkno == blkno && nextp->bc_len == len) {
nextp->bc_refcount++;
+ trace_xfs_log_recover_buf_cancel_ref_inc(log, buf_f);
return;
}
prevp = nextp;
@@ -1640,6 +1653,7 @@
bcp->bc_refcount = 1;
bcp->bc_next = NULL;
prevp->bc_next = bcp;
+ trace_xfs_log_recover_buf_cancel_add(log, buf_f);
}
/*
@@ -1779,6 +1793,8 @@
unsigned int *data_map = NULL;
unsigned int map_size = 0;
+ trace_xfs_log_recover_buf_inode_buf(mp->m_log, buf_f);
+
switch (buf_f->blf_type) {
case XFS_LI_BUF:
data_map = buf_f->blf_data_map;
@@ -1874,6 +1890,7 @@
/*ARGSUSED*/
STATIC void
xlog_recover_do_reg_buffer(
+ struct xfs_mount *mp,
xlog_recover_item_t *item,
xfs_buf_t *bp,
xfs_buf_log_format_t *buf_f)
@@ -1885,6 +1902,8 @@
unsigned int map_size = 0;
int error;
+ trace_xfs_log_recover_buf_reg_buf(mp->m_log, buf_f);
+
switch (buf_f->blf_type) {
case XFS_LI_BUF:
data_map = buf_f->blf_data_map;
@@ -2083,6 +2102,8 @@
{
uint type;
+ trace_xfs_log_recover_buf_dquot_buf(log, buf_f);
+
/*
* Filesystems are required to send in quota flags at mount time.
*/
@@ -2103,7 +2124,7 @@
if (log->l_quotaoffs_flag & type)
return;
- xlog_recover_do_reg_buffer(item, bp, buf_f);
+ xlog_recover_do_reg_buffer(mp, item, bp, buf_f);
}
/*
@@ -2164,9 +2185,11 @@
*/
cancel = xlog_recover_do_buffer_pass2(log, buf_f);
if (cancel) {
+ trace_xfs_log_recover_buf_cancel(log, buf_f);
return 0;
}
}
+ trace_xfs_log_recover_buf_recover(log, buf_f);
switch (buf_f->blf_type) {
case XFS_LI_BUF:
blkno = buf_f->blf_blkno;
@@ -2204,7 +2227,7 @@
(XFS_BLI_UDQUOT_BUF|XFS_BLI_PDQUOT_BUF|XFS_BLI_GDQUOT_BUF)) {
xlog_recover_do_dquot_buffer(mp, log, item, bp, buf_f);
} else {
- xlog_recover_do_reg_buffer(item, bp, buf_f);
+ xlog_recover_do_reg_buffer(mp, item, bp, buf_f);
}
if (error)
return XFS_ERROR(error);
@@ -2284,8 +2307,10 @@
if (xlog_check_buffer_cancelled(log, in_f->ilf_blkno,
in_f->ilf_len, 0)) {
error = 0;
+ trace_xfs_log_recover_inode_cancel(log, in_f);
goto error;
}
+ trace_xfs_log_recover_inode_recover(log, in_f);
bp = xfs_buf_read(mp->m_ddev_targp, in_f->ilf_blkno, in_f->ilf_len,
XBF_LOCK);
@@ -2337,6 +2362,7 @@
/* do nothing */
} else {
xfs_buf_relse(bp);
+ trace_xfs_log_recover_inode_skip(log, in_f);
error = 0;
goto error;
}
@@ -2758,11 +2784,12 @@
int error = 0;
xlog_recover_item_t *item;
- error = xlog_recover_reorder_trans(trans);
+ error = xlog_recover_reorder_trans(log, trans, pass);
if (error)
return error;
list_for_each_entry(item, &trans->r_itemq, ri_list) {
+ trace_xfs_log_recover_item_recover(log, trans, item, pass);
switch (ITEM_TYPE(item)) {
case XFS_LI_BUF:
error = xlog_recover_do_buffer_trans(log, item, pass);
@@ -2919,8 +2946,9 @@
error = xlog_recover_unmount_trans(trans);
break;
case XLOG_WAS_CONT_TRANS:
- error = xlog_recover_add_to_cont_trans(trans,
- dp, be32_to_cpu(ohead->oh_len));
+ error = xlog_recover_add_to_cont_trans(log,
+ trans, dp,
+ be32_to_cpu(ohead->oh_len));
break;
case XLOG_START_TRANS:
xlog_warn(
@@ -2930,7 +2958,7 @@
break;
case 0:
case XLOG_CONTINUE_TRANS:
- error = xlog_recover_add_to_trans(trans,
+ error = xlog_recover_add_to_trans(log, trans,
dp, be32_to_cpu(ohead->oh_len));
break;
default: