[PATCH 17/20] xfs: stop using bp naming for log recovery buffers

Christoph Hellwig
2019-05-23T17:41:56Z

Now that we don't use struct xfs_buf to hold log recovery buffer rename
the related functions and variables to just talk of a buffer instead of
using the bp name that we usually use for xfs_buf related functionality.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
fs/xfs/xfs_log_recover.c | 201 ++++++++++++++++++++-------------------
1 file changed, 102 insertions(+), 99 deletions(-)

diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index a28c9dc8f1f2..403c2c96ed71 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -79,7 +79,7 @@ struct xfs_buf_cancel {
* are valid, false otherwise.
*/
static inline bool
-xlog_verify_bp(
+xlog_verify_bno(
struct xlog *log,
xfs_daddr_t blk_no,
int bbcount)
@@ -96,7 +96,7 @@ xlog_verify_bp(
* a range of nbblks basic blocks at any valid offset within the log.
*/
static char *
-xlog_get_bp(
+xlog_alloc_buffer(
struct xlog *log,
int nbblks)
{
@@ -104,7 +104,7 @@ xlog_get_bp(
* Pass log block 0 since we don't have an addr yet, buffer will be
* verified on read.
*/
- if (!xlog_verify_bp(log, 0, nbblks)) {
+ if (!xlog_verify_bno(log, 0, nbblks)) {
xfs_warn(log->l_mp, "Invalid block length (0x%x) for buffer",
nbblks);
XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp);
@@ -153,7 +153,7 @@ xlog_do_io(
{
int error;

- if (!xlog_verify_bp(log, blk_no, nbblks)) {
+ if (!xlog_verify_bno(log, blk_no, nbblks)) {
xfs_warn(log->l_mp,
"Invalid log block/length (0x%llx, 0x%x) for buffer",
blk_no, nbblks);
@@ -327,7 +327,7 @@ xlog_recover_iodone(
STATIC int
xlog_find_cycle_start(
struct xlog *log,
- char *bp,
+ char *buffer,
xfs_daddr_t first_blk,
xfs_daddr_t *last_blk,
uint cycle)
@@ -341,7 +341,7 @@ xlog_find_cycle_start(
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);
+ error = xlog_bread(log, mid_blk, 1, buffer, &offset);
if (error)
return error;
mid_cycle = xlog_get_cycle(offset);
@@ -377,7 +377,7 @@ xlog_find_verify_cycle(
{
xfs_daddr_t i, j;
uint cycle;
- char *bp;
+ char *buffer;
xfs_daddr_t bufblks;
char *buf = NULL;
int error = 0;
@@ -391,7 +391,7 @@ xlog_find_verify_cycle(
bufblks = 1 << ffs(nbblks);
while (bufblks > log->l_logBBsize)
bufblks >>= 1;
- while (!(bp = xlog_get_bp(log, bufblks))) {
+ while (!(buffer = xlog_alloc_buffer(log, bufblks))) {
bufblks >>= 1;
if (bufblks < log->l_sectBBsize)
return -ENOMEM;
@@ -402,7 +402,7 @@ xlog_find_verify_cycle(

bcount = min(bufblks, (start_blk + nbblks - i));

- error = xlog_bread(log, i, bcount, bp, &buf);
+ error = xlog_bread(log, i, bcount, buffer, &buf);
if (error)
goto out;

@@ -420,7 +420,7 @@ xlog_find_verify_cycle(
*new_blk = -1;

out:
- kmem_free(bp);
+ kmem_free(buffer);
return error;
}

@@ -444,7 +444,7 @@ xlog_find_verify_log_record(
int extra_bblks)
{
xfs_daddr_t i;
- char *bp;
+ char *buffer;
char *offset = NULL;
xlog_rec_header_t *head = NULL;
int error = 0;
@@ -454,12 +454,14 @@ xlog_find_verify_log_record(

ASSERT(start_blk != 0 || *last_blk != start_blk);

- if (!(bp = xlog_get_bp(log, num_blks))) {
- if (!(bp = xlog_get_bp(log, 1)))
+ buffer = xlog_alloc_buffer(log, num_blks);
+ if (!buffer) {
+ buffer = xlog_alloc_buffer(log, 1);
+ if (!buffer)
return -ENOMEM;
smallmem = 1;
} else {
- error = xlog_bread(log, start_blk, num_blks, bp, &offset);
+ error = xlog_bread(log, start_blk, num_blks, buffer, &offset);
if (error)
goto out;
offset += ((num_blks - 1) << BBSHIFT);
@@ -476,7 +478,7 @@ xlog_find_verify_log_record(
}

if (smallmem) {
- error = xlog_bread(log, i, 1, bp, &offset);
+ error = xlog_bread(log, i, 1, buffer, &offset);
if (error)
goto out;
}
@@ -529,7 +531,7 @@ xlog_find_verify_log_record(
*last_blk = i;

out:
- kmem_free(bp);
+ kmem_free(buffer);
return error;
}

@@ -551,7 +553,7 @@ xlog_find_head(
struct xlog *log,
xfs_daddr_t *return_head_blk)
{
- char *bp;
+ char *buffer;
char *offset;
xfs_daddr_t new_blk, first_blk, start_blk, last_blk, head_blk;
int num_scan_bblks;
@@ -581,20 +583,20 @@ xlog_find_head(
}

first_blk = 0; /* get cycle # of 1st block */
- bp = xlog_get_bp(log, 1);
- if (!bp)
+ buffer = xlog_alloc_buffer(log, 1);
+ if (!buffer)
return -ENOMEM;

- error = xlog_bread(log, 0, 1, bp, &offset);
+ error = xlog_bread(log, 0, 1, buffer, &offset);
if (error)
- goto bp_err;
+ goto out_free_buffer;

first_half_cycle = xlog_get_cycle(offset);

last_blk = head_blk = log_bbnum - 1; /* get cycle # of last block */
- error = xlog_bread(log, last_blk, 1, bp, &offset);
+ error = xlog_bread(log, last_blk, 1, buffer, &offset);
if (error)
- goto bp_err;
+ goto out_free_buffer;

last_half_cycle = xlog_get_cycle(offset);
ASSERT(last_half_cycle != 0);
@@ -662,9 +664,10 @@ xlog_find_head(
* ^ we want to locate this spot
*/
stop_on_cycle = last_half_cycle;
- if ((error = xlog_find_cycle_start(log, bp, first_blk,
- &head_blk, last_half_cycle)))
- goto bp_err;
+ error = xlog_find_cycle_start(log, buffer, first_blk, &head_blk,
+ last_half_cycle);
+ if (error)
+ goto out_free_buffer;
}

/*
@@ -684,7 +687,7 @@ xlog_find_head(
if ((error = xlog_find_verify_cycle(log,
start_blk, num_scan_bblks,
stop_on_cycle, &new_blk)))
- goto bp_err;
+ goto out_free_buffer;
if (new_blk != -1)
head_blk = new_blk;
} else { /* need to read 2 parts of log */
@@ -721,7 +724,7 @@ xlog_find_head(
if ((error = xlog_find_verify_cycle(log, start_blk,
num_scan_bblks - (int)head_blk,
(stop_on_cycle - 1), &new_blk)))
- goto bp_err;
+ goto out_free_buffer;
if (new_blk != -1) {
head_blk = new_blk;
goto validate_head;
@@ -737,7 +740,7 @@ xlog_find_head(
if ((error = xlog_find_verify_cycle(log,
start_blk, (int)head_blk,
stop_on_cycle, &new_blk)))
- goto bp_err;
+ goto out_free_buffer;
if (new_blk != -1)
head_blk = new_blk;
}
@@ -756,13 +759,13 @@ xlog_find_head(
if (error == 1)
error = -EIO;
if (error)
- goto bp_err;
+ goto out_free_buffer;
} else {
start_blk = 0;
ASSERT(head_blk <= INT_MAX);
error = xlog_find_verify_log_record(log, start_blk, &head_blk, 0);
if (error < 0)
- goto bp_err;
+ goto out_free_buffer;
if (error == 1) {
/* We hit the beginning of the log during our search */
start_blk = log_bbnum - (num_scan_bblks - head_blk);
@@ -775,14 +778,14 @@ xlog_find_head(
if (error == 1)
error = -EIO;
if (error)
- goto bp_err;
+ goto out_free_buffer;
if (new_blk != log_bbnum)
head_blk = new_blk;
} else if (error)
- goto bp_err;
+ goto out_free_buffer;
}

- kmem_free(bp);
+ kmem_free(buffer);
if (head_blk == log_bbnum)
*return_head_blk = 0;
else
@@ -795,9 +798,8 @@ xlog_find_head(
*/
return 0;

- bp_err:
- kmem_free(bp);
-
+out_free_buffer:
+ kmem_free(buffer);
if (error)
xfs_warn(log->l_mp, "failed to find log head");
return error;
@@ -817,7 +819,7 @@ xlog_rseek_logrec_hdr(
xfs_daddr_t head_blk,
xfs_daddr_t tail_blk,
int count,
- char *bp,
+ char *buffer,
xfs_daddr_t *rblk,
struct xlog_rec_header **rhead,
bool *wrapped)
@@ -836,7 +838,7 @@ xlog_rseek_logrec_hdr(
*/
end_blk = head_blk > tail_blk ? tail_blk : 0;
for (i = (int) head_blk - 1; i >= end_blk; i--) {
- error = xlog_bread(log, i, 1, bp, &offset);
+ error = xlog_bread(log, i, 1, buffer, &offset);
if (error)
goto out_error;

@@ -855,7 +857,7 @@ xlog_rseek_logrec_hdr(
*/
if (tail_blk >= head_blk && found != count) {
for (i = log->l_logBBsize - 1; i >= (int) tail_blk; i--) {
- error = xlog_bread(log, i, 1, bp, &offset);
+ error = xlog_bread(log, i, 1, buffer, &offset);
if (error)
goto out_error;

@@ -891,7 +893,7 @@ xlog_seek_logrec_hdr(
xfs_daddr_t head_blk,
xfs_daddr_t tail_blk,
int count,
- char *bp,
+ char *buffer,
xfs_daddr_t *rblk,
struct xlog_rec_header **rhead,
bool *wrapped)
@@ -910,7 +912,7 @@ xlog_seek_logrec_hdr(
*/
end_blk = head_blk > tail_blk ? head_blk : log->l_logBBsize - 1;
for (i = (int) tail_blk; i <= end_blk; i++) {
- error = xlog_bread(log, i, 1, bp, &offset);
+ error = xlog_bread(log, i, 1, buffer, &offset);
if (error)
goto out_error;

@@ -928,7 +930,7 @@ xlog_seek_logrec_hdr(
*/
if (tail_blk > head_blk && found != count) {
for (i = 0; i < (int) head_blk; i++) {
- error = xlog_bread(log, i, 1, bp, &offset);
+ error = xlog_bread(log, i, 1, buffer, &offset);
if (error)
goto out_error;

@@ -991,22 +993,22 @@ xlog_verify_tail(
int hsize)
{
struct xlog_rec_header *thead;
- char *bp;
+ char *buffer;
xfs_daddr_t first_bad;
int error = 0;
bool wrapped;
xfs_daddr_t tmp_tail;
xfs_daddr_t orig_tail = *tail_blk;

- bp = xlog_get_bp(log, 1);
- if (!bp)
+ buffer = xlog_alloc_buffer(log, 1);
+ if (!buffer)
return -ENOMEM;

/*
* Make sure the tail points to a record (returns positive count on
* success).
*/
- error = xlog_seek_logrec_hdr(log, head_blk, *tail_blk, 1, bp,
+ error = xlog_seek_logrec_hdr(log, head_blk, *tail_blk, 1, buffer,
&tmp_tail, &thead, &wrapped);
if (error < 0)
goto out;
@@ -1035,8 +1037,8 @@ xlog_verify_tail(
break;

/* skip to the next record; returns positive count on success */
- error = xlog_seek_logrec_hdr(log, head_blk, first_bad, 2, bp,
- &tmp_tail, &thead, &wrapped);
+ error = xlog_seek_logrec_hdr(log, head_blk, first_bad, 2,
+ buffer, &tmp_tail, &thead, &wrapped);
if (error < 0)
goto out;

@@ -1051,7 +1053,7 @@ xlog_verify_tail(
"Tail block (0x%llx) overwrite detected. Updated to 0x%llx",
orig_tail, *tail_blk);
out:
- kmem_free(bp);
+ kmem_free(buffer);
return error;
}

@@ -1073,13 +1075,13 @@ xlog_verify_head(
struct xlog *log,
xfs_daddr_t *head_blk, /* in/out: unverified head */
xfs_daddr_t *tail_blk, /* out: tail block */
- char *bp,
+ char *buffer,
xfs_daddr_t *rhead_blk, /* start blk of last record */
struct xlog_rec_header **rhead, /* ptr to last record */
bool *wrapped) /* last rec. wraps phys. log */
{
struct xlog_rec_header *tmp_rhead;
- char *tmp_bp;
+ char *tmp_buffer;
xfs_daddr_t first_bad;
xfs_daddr_t tmp_rhead_blk;
int found;
@@ -1090,15 +1092,15 @@ xlog_verify_head(
* Check the head of the log for torn writes. Search backwards from the
* head until we hit the tail or the maximum number of log record I/Os
* that could have been in flight at one time. Use a temporary buffer so
- * we don't trash the rhead/bp pointers from the caller.
+ * we don't trash the rhead/buffer pointers from the caller.
*/
- tmp_bp = xlog_get_bp(log, 1);
- if (!tmp_bp)
+ tmp_buffer = xlog_alloc_buffer(log, 1);
+ if (!tmp_buffer)
return -ENOMEM;
error = xlog_rseek_logrec_hdr(log, *head_blk, *tail_blk,
- XLOG_MAX_ICLOGS, tmp_bp, &tmp_rhead_blk,
- &tmp_rhead, &tmp_wrapped);
- kmem_free(tmp_bp);
+ XLOG_MAX_ICLOGS, tmp_buffer,
+ &tmp_rhead_blk, &tmp_rhead, &tmp_wrapped);
+ kmem_free(tmp_buffer);
if (error < 0)
return error;

@@ -1127,8 +1129,8 @@ xlog_verify_head(
* (i.e., the records with invalid CRC) if the cycle number
* matches the the current cycle.
*/
- found = xlog_rseek_logrec_hdr(log, first_bad, *tail_blk, 1, bp,
- rhead_blk, rhead, wrapped);
+ found = xlog_rseek_logrec_hdr(log, first_bad, *tail_blk, 1,
+ buffer, rhead_blk, rhead, wrapped);
if (found < 0)
return found;
if (found == 0) /* XXX: right thing to do here? */
@@ -1188,7 +1190,7 @@ xlog_check_unmount_rec(
xfs_daddr_t *tail_blk,
struct xlog_rec_header *rhead,
xfs_daddr_t rhead_blk,
- char *bp,
+ char *buffer,
bool *clean)
{
struct xlog_op_header *op_head;
@@ -1231,7 +1233,7 @@ xlog_check_unmount_rec(
if (*head_blk == after_umount_blk &&
be32_to_cpu(rhead->h_num_logops) == 1) {
umount_data_blk = xlog_wrap_logbno(log, rhead_blk + hblks);
- error = xlog_bread(log, umount_data_blk, 1, bp, &offset);
+ error = xlog_bread(log, umount_data_blk, 1, buffer, &offset);
if (error)
return error;

@@ -1310,7 +1312,7 @@ xlog_find_tail(
{
xlog_rec_header_t *rhead;
char *offset = NULL;
- char *bp;
+ char *buffer;
int error;
xfs_daddr_t rhead_blk;
xfs_lsn_t tail_lsn;
@@ -1324,11 +1326,11 @@ xlog_find_tail(
return error;
ASSERT(*head_blk < INT_MAX);

- bp = xlog_get_bp(log, 1);
- if (!bp)
+ buffer = xlog_alloc_buffer(log, 1);
+ if (!buffer)
return -ENOMEM;
if (*head_blk == 0) { /* special case */
- error = xlog_bread(log, 0, 1, bp, &offset);
+ error = xlog_bread(log, 0, 1, buffer, &offset);
if (error)
goto done;

@@ -1344,7 +1346,7 @@ xlog_find_tail(
* block. This wraps all the way back around to the head so something is
* seriously wrong if we can't find it.
*/
- error = xlog_rseek_logrec_hdr(log, *head_blk, *head_blk, 1, bp,
+ error = xlog_rseek_logrec_hdr(log, *head_blk, *head_blk, 1, buffer,
&rhead_blk, &rhead, &wrapped);
if (error < 0)
return error;
@@ -1365,7 +1367,7 @@ xlog_find_tail(
* state to determine whether recovery is necessary.
*/
error = xlog_check_unmount_rec(log, head_blk, tail_blk, rhead,
- rhead_blk, bp, &clean);
+ rhead_blk, buffer, &clean);
if (error)
goto done;

@@ -1382,7 +1384,7 @@ xlog_find_tail(
if (!clean) {
xfs_daddr_t orig_head = *head_blk;

- error = xlog_verify_head(log, head_blk, tail_blk, bp,
+ error = xlog_verify_head(log, head_blk, tail_blk, buffer,
&rhead_blk, &rhead, &wrapped);
if (error)
goto done;
@@ -1393,7 +1395,7 @@ xlog_find_tail(
wrapped);
tail_lsn = atomic64_read(&log->l_tail_lsn);
error = xlog_check_unmount_rec(log, head_blk, tail_blk,
- rhead, rhead_blk, bp,
+ rhead, rhead_blk, buffer,
&clean);
if (error)
goto done;
@@ -1431,7 +1433,7 @@ xlog_find_tail(
error = xlog_clear_stale_blocks(log, tail_lsn);

done:
- kmem_free(bp);
+ kmem_free(buffer);

if (error)
xfs_warn(log->l_mp, "failed to locate log tail");
@@ -1459,7 +1461,7 @@ xlog_find_zeroed(
struct xlog *log,
xfs_daddr_t *blk_no)
{
- char *bp;
+ char *buffer;
char *offset;
uint first_cycle, last_cycle;
xfs_daddr_t new_blk, last_blk, start_blk;
@@ -1469,35 +1471,36 @@ xlog_find_zeroed(
*blk_no = 0;

/* check totally zeroed log */
- bp = xlog_get_bp(log, 1);
- if (!bp)
+ buffer = xlog_alloc_buffer(log, 1);
+ if (!buffer)
return -ENOMEM;
- error = xlog_bread(log, 0, 1, bp, &offset);
+ error = xlog_bread(log, 0, 1, buffer, &offset);
if (error)
- goto bp_err;
+ goto out_free_buffer;

first_cycle = xlog_get_cycle(offset);
if (first_cycle == 0) { /* completely zeroed log */
*blk_no = 0;
- kmem_free(bp);
+ kmem_free(buffer);
return 1;
}

/* check partially zeroed log */
- error = xlog_bread(log, log_bbnum-1, 1, bp, &offset);
+ error = xlog_bread(log, log_bbnum-1, 1, buffer, &offset);
if (error)
- goto bp_err;
+ goto out_free_buffer;

last_cycle = xlog_get_cycle(offset);
if (last_cycle != 0) { /* log completely written to */
- kmem_free(bp);
+ kmem_free(buffer);
return 0;
}

/* we have a partially zeroed log */
last_blk = log_bbnum-1;
- if ((error = xlog_find_cycle_start(log, bp, 0, &last_blk, 0)))
- goto bp_err;
+ error = xlog_find_cycle_start(log, buffer, 0, &last_blk, 0);
+ if (error)
+ goto out_free_buffer;

/*
* Validate the answer. Because there is no way to guarantee that
@@ -1520,7 +1523,7 @@ xlog_find_zeroed(
*/
if ((error = xlog_find_verify_cycle(log, start_blk,
(int)num_scan_bblks, 0, &new_blk)))
- goto bp_err;
+ goto out_free_buffer;
if (new_blk != -1)
last_blk = new_blk;

@@ -1532,11 +1535,11 @@ xlog_find_zeroed(
if (error == 1)
error = -EIO;
if (error)
- goto bp_err;
+ goto out_free_buffer;

*blk_no = last_blk;
-bp_err:
- kmem_free(bp);
+out_free_buffer:
+ kmem_free(buffer);
if (error)
return error;
return 1;
@@ -1579,7 +1582,7 @@ xlog_write_log_records(
int tail_block)
{
char *offset;
- char *bp;
+ char *buffer;
int balign, ealign;
int sectbb = log->l_sectBBsize;
int end_block = start_block + blocks;
@@ -1596,7 +1599,7 @@ xlog_write_log_records(
bufblks = 1 << ffs(blocks);
while (bufblks > log->l_logBBsize)
bufblks >>= 1;
- while (!(bp = xlog_get_bp(log, bufblks))) {
+ while (!(buffer = xlog_alloc_buffer(log, bufblks))) {
bufblks >>= 1;
if (bufblks < sectbb)
return -ENOMEM;
@@ -1608,9 +1611,9 @@ xlog_write_log_records(
*/
balign = round_down(start_block, sectbb);
if (balign != start_block) {
- error = xlog_bread_noalign(log, start_block, 1, bp);
+ error = xlog_bread_noalign(log, start_block, 1, buffer);
if (error)
- goto out_put_bp;
+ goto out_free_buffer;

j = start_block - balign;
}
@@ -1628,27 +1631,27 @@ xlog_write_log_records(
ealign = round_down(end_block, sectbb);
if (j == 0 && (start_block + endcount > ealign)) {
error = xlog_bread_noalign(log, ealign, sectbb,
- bp + BBTOB(ealign - start_block));
+ buffer + BBTOB(ealign - start_block));
if (error)
break;

}

- offset = bp + xlog_align(log, start_block);
+ offset = buffer + xlog_align(log, start_block);
for (; j < endcount; j++) {
xlog_add_record(log, offset, cycle, i+j,
tail_cycle, tail_block);
offset += BBSIZE;
}
- error = xlog_bwrite(log, start_block, endcount, bp);
+ error = xlog_bwrite(log, start_block, endcount, buffer);
if (error)
break;
start_block += endcount;
j = 0;
}

- out_put_bp:
- kmem_free(bp);
+out_free_buffer:
+ kmem_free(buffer);
return error;
}

@@ -5253,7 +5256,7 @@ xlog_do_recovery_pass(
* iclog header and extract the header size from it. Get a
* new hbp that is the correct size.
*/
- hbp = xlog_get_bp(log, 1);
+ hbp = xlog_alloc_buffer(log, 1);
if (!hbp)
return -ENOMEM;

@@ -5296,20 +5299,20 @@ xlog_do_recovery_pass(
if (h_size % XLOG_HEADER_CYCLE_SIZE)
hblks++;
kmem_free(hbp);
- hbp = xlog_get_bp(log, hblks);
+ hbp = xlog_alloc_buffer(log, hblks);
} else {
hblks = 1;
}
} else {
ASSERT(log->l_sectBBsize == 1);
hblks = 1;
- hbp = xlog_get_bp(log, 1);
+ hbp = xlog_alloc_buffer(log, 1);
h_size = XLOG_BIG_RECORD_BSIZE;
}

if (!hbp)
return -ENOMEM;
- dbp = xlog_get_bp(log, BTOBB(h_size));
+ dbp = xlog_alloc_buffer(log, BTOBB(h_size));
if (!dbp) {
kmem_free(hbp);
return -ENOMEM;
--
2.20.1