#define xlog_recover_check_summary(log)
#endif
-
/*
* Sector aligned buffer routines for buffer create/read/write/access
*/
-#define XLOG_SECTOR_ROUNDUP_BBCOUNT(log, bbs) \
- ( ((log)->l_sectbb_mask && (bbs & (log)->l_sectbb_mask)) ? \
- ((bbs + (log)->l_sectbb_mask + 1) & ~(log)->l_sectbb_mask) : (bbs) )
-#define XLOG_SECTOR_ROUNDDOWN_BLKNO(log, bno) ((bno) & ~(log)->l_sectbb_mask)
+/* Number of basic blocks in a log sector */
+#define xlog_sectbb(log) (1 << (log)->l_sectbb_log)
+/*
+ * Verify the given count of basic blocks is valid number of blocks
+ * to specify for an operation involving the given XFS log buffer.
+ * Returns nonzero if the count is valid, 0 otherwise.
+ */
+
+static inline int
+xlog_buf_bbcount_valid(
+ xlog_t *log,
+ int bbcount)
+{
+ return bbcount > 0 && bbcount <= log->l_logBBsize;
+}
+
+/*
+ * Allocate a buffer to hold log data. The buffer needs to be able
+ * to map to a range of nbblks basic blocks at any valid (basic
+ * block) offset within the log.
+ */
STATIC xfs_buf_t *
xlog_get_bp(
xlog_t *log,
int nbblks)
{
- if (nbblks <= 0 || nbblks > log->l_logBBsize) {
- xlog_warn("XFS: Invalid block length (0x%x) given for buffer", nbblks);
- XFS_ERROR_REPORT("xlog_get_bp(1)",
- XFS_ERRLEVEL_HIGH, log->l_mp);
+ if (!xlog_buf_bbcount_valid(log, nbblks)) {
+ xlog_warn("XFS: Invalid block length (0x%x) given for buffer",
+ nbblks);
+ XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp);
return NULL;
}
- if (log->l_sectbb_log) {
- if (nbblks > 1)
- nbblks += XLOG_SECTOR_ROUNDUP_BBCOUNT(log, 1);
- nbblks = XLOG_SECTOR_ROUNDUP_BBCOUNT(log, nbblks);
- }
+ /*
+ * We do log I/O in units of log sectors (a power-of-2
+ * multiple of the basic block size), so we round up the
+ * requested size to acommodate the basic blocks required
+ * for complete log sectors.
+ *
+ * In addition, the buffer may be used for a non-sector-
+ * aligned block offset, in which case an I/O of the
+ * requested size could extend beyond the end of the
+ * buffer. If the requested size is only 1 basic block it
+ * will never straddle a sector boundary, so this won't be
+ * an issue. Nor will this be a problem if the log I/O is
+ * done in basic blocks (sector size 1). But otherwise we
+ * extend the buffer by one extra log sector to ensure
+ * there's space to accomodate this possiblility.
+ */
+ if (nbblks > 1 && log->l_sectbb_log)
+ nbblks += xlog_sectbb(log);
+ nbblks = round_up(nbblks, xlog_sectbb(log));
+
return xfs_buf_get_noaddr(BBTOB(nbblks), log->l_mp->m_logdev_targp);
}
{
int error;
- if (nbblks <= 0 || nbblks > log->l_logBBsize) {
- xlog_warn("XFS: Invalid block length (0x%x) given for buffer", nbblks);
- XFS_ERROR_REPORT("xlog_bread(1)",
- XFS_ERRLEVEL_HIGH, log->l_mp);
+ if (!xlog_buf_bbcount_valid(log, nbblks)) {
+ xlog_warn("XFS: Invalid block length (0x%x) given for buffer",
+ nbblks);
+ XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp);
return EFSCORRUPTED;
}
- if (log->l_sectbb_log) {
- blk_no = XLOG_SECTOR_ROUNDDOWN_BLKNO(log, blk_no);
- nbblks = XLOG_SECTOR_ROUNDUP_BBCOUNT(log, nbblks);
- }
+ blk_no = round_down(blk_no, xlog_sectbb(log));
+ nbblks = round_up(nbblks, xlog_sectbb(log));
ASSERT(nbblks > 0);
ASSERT(BBTOB(nbblks) <= XFS_BUF_SIZE(bp));
{
int error;
- if (nbblks <= 0 || nbblks > log->l_logBBsize) {
- xlog_warn("XFS: Invalid block length (0x%x) given for buffer", nbblks);
- XFS_ERROR_REPORT("xlog_bwrite(1)",
- XFS_ERRLEVEL_HIGH, log->l_mp);
+ if (!xlog_buf_bbcount_valid(log, nbblks)) {
+ xlog_warn("XFS: Invalid block length (0x%x) given for buffer",
+ nbblks);
+ XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp);
return EFSCORRUPTED;
}
- if (log->l_sectbb_log) {
- blk_no = XLOG_SECTOR_ROUNDDOWN_BLKNO(log, blk_no);
- nbblks = XLOG_SECTOR_ROUNDUP_BBCOUNT(log, nbblks);
- }
+ blk_no = round_down(blk_no, xlog_sectbb(log));
+ nbblks = round_up(nbblks, xlog_sectbb(log));
ASSERT(nbblks > 0);
ASSERT(BBTOB(nbblks) <= XFS_BUF_SIZE(bp));
{
xfs_caddr_t offset;
xfs_daddr_t mid_blk;
+ xfs_daddr_t end_blk;
uint mid_cycle;
int error;
- mid_blk = BLK_AVG(first_blk, *last_blk);
- while (mid_blk != first_blk && mid_blk != *last_blk) {
+ end_blk = *last_blk;
+ mid_blk = BLK_AVG(first_blk, end_blk);
+ while (mid_blk != first_blk && mid_blk != end_blk) {
error = xlog_bread(log, mid_blk, 1, bp, &offset);
if (error)
return error;
mid_cycle = xlog_get_cycle(offset);
- if (mid_cycle == cycle) {
- *last_blk = mid_blk;
- /* last_half_cycle == mid_cycle */
- } else {
- first_blk = mid_blk;
- /* first_half_cycle == mid_cycle */
- }
- mid_blk = BLK_AVG(first_blk, *last_blk);
+ if (mid_cycle == cycle)
+ end_blk = mid_blk; /* last_half_cycle == mid_cycle */
+ else
+ first_blk = mid_blk; /* first_half_cycle == mid_cycle */
+ mid_blk = BLK_AVG(first_blk, end_blk);
}
- ASSERT((mid_blk == first_blk && mid_blk+1 == *last_blk) ||
- (mid_blk == *last_blk && mid_blk-1 == first_blk));
+ ASSERT((mid_blk == first_blk && mid_blk+1 == end_blk) ||
+ (mid_blk == end_blk && mid_blk-1 == first_blk));
+
+ *last_blk = end_blk;
return 0;
}
xfs_caddr_t buf = NULL;
int error = 0;
+ /*
+ * Greedily allocate a buffer big enough to handle the full
+ * range of basic blocks we'll be examining. If that fails,
+ * try a smaller size. We need to be able to read at least
+ * a log sector, or we're out of luck.
+ */
bufblks = 1 << ffs(nbblks);
-
while (!(bp = xlog_get_bp(log, bufblks))) {
- /* can't get enough memory to do everything in one big buffer */
bufblks >>= 1;
- if (bufblks <= log->l_sectbb_log)
+ if (bufblks < xlog_sectbb(log))
return ENOMEM;
}
goto bp_err;
if (new_blk != -1) {
head_blk = new_blk;
- goto bad_blk;
+ goto validate_head;
}
/*
head_blk = new_blk;
}
- bad_blk:
+validate_head:
/*
* Now we need to make sure head_blk is not pointing to a block in
* the middle of a log record.
if (*head_blk == 0) { /* special case */
error = xlog_bread(log, 0, 1, bp, &offset);
if (error)
- goto bread_err;
+ goto done;
if (xlog_get_cycle(offset) == 0) {
*tail_blk = 0;
/* leave all other log inited values alone */
- goto exit;
+ goto done;
}
}
for (i = (int)(*head_blk) - 1; i >= 0; i--) {
error = xlog_bread(log, i, 1, bp, &offset);
if (error)
- goto bread_err;
+ goto done;
if (XLOG_HEADER_MAGIC_NUM == be32_to_cpu(*(__be32 *)offset)) {
found = 1;
for (i = log->l_logBBsize - 1; i >= (int)(*head_blk); i--) {
error = xlog_bread(log, i, 1, bp, &offset);
if (error)
- goto bread_err;
+ goto done;
if (XLOG_HEADER_MAGIC_NUM ==
be32_to_cpu(*(__be32 *)offset)) {
umount_data_blk = (i + hblks) % log->l_logBBsize;
error = xlog_bread(log, umount_data_blk, 1, bp, &offset);
if (error)
- goto bread_err;
+ goto done;
op_head = (xlog_op_header_t *)offset;
if (op_head->oh_flags & XLOG_UNMOUNT_TRANS) {
* But... if the -device- itself is readonly, just skip this.
* We can't recover this device anyway, so it won't matter.
*/
- if (!xfs_readonly_buftarg(log->l_mp->m_logdev_targp)) {
+ if (!xfs_readonly_buftarg(log->l_mp->m_logdev_targp))
error = xlog_clear_stale_blocks(log, tail_lsn);
- }
-bread_err:
-exit:
+done:
xlog_put_bp(bp);
if (error)
xfs_caddr_t offset;
xfs_buf_t *bp;
int balign, ealign;
- int sectbb = XLOG_SECTOR_ROUNDUP_BBCOUNT(log, 1);
+ int sectbb = xlog_sectbb(log);
int end_block = start_block + blocks;
int bufblks;
int error = 0;
int i, j = 0;
+ /*
+ * Greedily allocate a buffer big enough to handle the full
+ * range of basic blocks to be written. If that fails, try
+ * a smaller size. We need to be able to write at least a
+ * log sector, or we're out of luck.
+ */
bufblks = 1 << ffs(blocks);
while (!(bp = xlog_get_bp(log, bufblks))) {
bufblks >>= 1;
- if (bufblks <= log->l_sectbb_log)
+ if (bufblks < xlog_sectbb(log))
return ENOMEM;
}
* the buffer in the starting sector not covered by the first
* write below.
*/
- balign = XLOG_SECTOR_ROUNDDOWN_BLKNO(log, start_block);
+ balign = round_down(start_block, sectbb);
if (balign != start_block) {
error = xlog_bread_noalign(log, start_block, 1, bp);
if (error)
* the buffer in the final sector not covered by the write.
* If this is the same sector as the above read, skip it.
*/
- ealign = XLOG_SECTOR_ROUNDDOWN_BLKNO(log, end_block);
+ ealign = round_down(end_block, sectbb);
if (j == 0 && (start_block + endcount > ealign)) {
offset = XFS_BUF_PTR(bp);
balign = BBTOB(ealign - start_block);
STATIC int
xlog_recover_add_to_cont_trans(
+ struct log *log,
xlog_recover_t *trans,
xfs_caddr_t dp,
int len)
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;
}
*/
STATIC int
xlog_recover_add_to_trans(
+ struct log *log,
xlog_recover_t *trans,
xfs_caddr_t dp,
int len)
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;
}
*/
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);
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;
}
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:
/*
* 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
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;
bcp->bc_refcount = 1;
bcp->bc_next = NULL;
prevp->bc_next = bcp;
+ trace_xfs_log_recover_buf_cancel_add(log, buf_f);
}
/*
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;
/*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)
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;
{
uint type;
+ trace_xfs_log_recover_buf_dquot_buf(log, buf_f);
+
/*
* Filesystems are required to send in quota flags at mount time.
*/
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);
}
/*
*/
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;
(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);
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);
/* do nothing */
} else {
xfs_buf_relse(bp);
+ trace_xfs_log_recover_inode_skip(log, in_f);
error = 0;
goto error;
}
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);
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(
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:
projects / mv-sheeva.git / blobdiff