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Add error flag to cbd_params, set it on write error

This commit is contained in:
Tom Marshall 2019-11-09 17:01:25 +01:00
parent 97eb421b58
commit 66eeec39f5
6 changed files with 30 additions and 17 deletions
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11
dm-compress/compress.c
View File

@ -91,7 +91,8 @@ compress_read_header(struct compress* c)
pblkbuf = page_address(pblkpage);
iopagev[0] = pblkpage;
ret = pblk_read_wait(c->dev->bdev, 0, 1, iopagev);
header.params.priv = c->dev->bdev;
ret = pblk_read_wait(&header.params, 0, 1, iopagev);
if (ret) {
printk(KERN_ERR "%s: failed to read header\n", __func__);
goto out;
@ -186,7 +187,7 @@ compress_write_header(struct compress* c)
memcpy(&header.stats, &c->stats, sizeof(header.stats));
cbd_header_put(pblkbuf, &header);
iopagev[0] = pblkpage;
ret = pblk_write_wait(c->params.priv, 0, 1, iopagev);
ret = pblk_write_wait(&c->params, 0, 1, iopagev);
if (ret) {
printk(KERN_ERR "%s: failed to write header\n", __func__);
}
@ -475,6 +476,12 @@ compress_map(struct dm_target *ti, struct bio *bio)
struct compress *c = ti->private;
struct compress_io *cio;
if (c->params.flags & CBD_FLAG_ERROR) {
bio->bi_status = BLK_STS_IOERR;
bio_endio(bio);
return DM_MAPIO_SUBMITTED; /* XXXX: DM_MAPIO_KILL? */
}
/* from dm-crypt.c */
if (unlikely(bio->bi_opf & REQ_PREFLUSH || bio_op(bio) == REQ_OP_DISCARD)) {
bio_set_dev(bio, c->dev->bdev);

4
dm-compress/lbatpage.c
View File

@ -91,7 +91,7 @@ lbatpage_flush(struct lbatpage* lp)
goto unlock;
}
iopagev[0] = lp->page;
pblk_write(lp->params->priv, lp->pblk, 1, iopagev);
pblk_write(lp->params, lp->pblk, 1, iopagev);
mutex_unlock(&lp->lock);
return ret;
@ -110,7 +110,7 @@ lbatpage_read(struct lbatpage* lp)
struct page* pagev[1];
pagev[0] = lp->page;
ret = pblk_read_wait(lp->params->priv, lp->pblk, 1, pagev);
ret = pblk_read_wait(lp->params, lp->pblk, 1, pagev);
return ret;
}

4
dm-compress/lbd.c
View File

@ -354,7 +354,7 @@ lbd_flush(struct lbd* lbd, struct cbd_stats* stats)
pblk = lbatview_elem_pblk(lbd->lv, lbd->lblk, n);
BUG_ON(pblk == PBLK_NONE);
iopagev[0] = lbd->pagev[n];
pblk_write(lbd->params->priv, pblk, 1, iopagev);
pblk_write(lbd->params, pblk, 1, iopagev);
}
while (n < lblk_per_pblk(lbd->params)) {
unlock_page(lbd->pagev[n]);
@ -407,7 +407,7 @@ lbd_read(struct lbd* lbd)
}
iopagev[0] = lbd->pagev[n];
/* XXX: Issue non-blocking reads? */
ret = pblk_read_wait(lbd->params->priv, pblk, 1, iopagev);
ret = pblk_read_wait(lbd->params, pblk, 1, iopagev);
if (ret) {
goto out;
}

4
dm-compress/pbat.c
View File

@ -112,7 +112,7 @@ pbat_flush(struct pbat* pbat)
goto unlock;
}
pblk = pbat_off(pbat->params, pbat->zone);
pblk_write(pbat->params->priv, pblk, nr_pages, pbat->pagev);
pblk_write(pbat->params, pblk, nr_pages, pbat->pagev);
mutex_unlock(&pbat->lock);
return ret;
@ -138,7 +138,7 @@ pbat_read(struct pbat* pbat)
return -EIO;
}
pblk = pbat_off(pbat->params, pbat->zone);
ret = pblk_read_wait(pbat->params->priv, pblk, nr_pages, pbat->pagev);
ret = pblk_read_wait(pbat->params, pblk, nr_pages, pbat->pagev);
return ret;
}

17
dm-compress/util.c
View File

@ -123,13 +123,13 @@ pblk_io_prepare(struct block_device* bdev, unsigned int op,
}
int
pblk_read_wait(struct block_device* bdev,
pblk_read_wait(struct cbd_params* params,
u64 pblk, u32 count, struct page** pagev)
{
int ret;
struct bio* bio;
bio = pblk_io_prepare(bdev, REQ_OP_READ, pblk, count, pagev);
bio = pblk_io_prepare(params->priv, REQ_OP_READ, pblk, count, pagev);
if (!bio) {
printk(KERN_ERR "%s: out of memory\n", __func__);
return -ENOMEM;
@ -144,13 +144,13 @@ pblk_read_wait(struct block_device* bdev,
}
int
pblk_write_wait(struct block_device* bdev,
pblk_write_wait(struct cbd_params* params,
u64 pblk, u32 count, struct page** pagev)
{
int ret;
struct bio* bio;
bio = pblk_io_prepare(bdev, REQ_OP_WRITE, pblk, count, pagev);
bio = pblk_io_prepare(params->priv, REQ_OP_WRITE, pblk, count, pagev);
if (!bio) {
printk(KERN_ERR "%s: out of memory\n", __func__);
return -ENOMEM;
@ -158,6 +158,7 @@ pblk_write_wait(struct block_device* bdev,
ret = submit_bio_wait(bio);
if (ret) {
printk(KERN_ERR "%s: submit_bio_wait failed: %d\n", __func__, ret);
params->flags |= CBD_FLAG_ERROR;
}
bio_put(bio);
@ -167,11 +168,13 @@ pblk_write_wait(struct block_device* bdev,
void
pblk_write_endio(struct bio* bio)
{
struct cbd_params* params = bio->bi_private;
u32 n;
struct page* page;
BUG_ON(!bio);
if (bio->bi_status != BLK_STS_OK) {
params->flags |= CBD_FLAG_ERROR;
for (n = 0; n < bio->bi_max_vecs; ++n) {
page = bio->bi_io_vec[n].bv_page;
SetPageError(page);
@ -186,15 +189,16 @@ pblk_write_endio(struct bio* bio)
}
void
pblk_write(struct block_device* bdev,
pblk_write(struct cbd_params* params,
u64 pblk, u32 count, struct page** pagev)
{
struct bio* bio;
u32 n;
bio = pblk_io_prepare(bdev, REQ_OP_WRITE, pblk, count, pagev);
bio = pblk_io_prepare(params->priv, REQ_OP_WRITE, pblk, count, pagev);
if (!bio) {
printk(KERN_ERR "%s: out of memory\n", __func__);
params->flags |= CBD_FLAG_ERROR;
for (n = 0; n < count; ++n) {
SetPageError(pagev[n]);
unlock_page(pagev[n]);
@ -202,6 +206,7 @@ pblk_write(struct block_device* bdev,
return;
}
bio->bi_end_io = pblk_write_endio;
bio->bi_private = params;
submit_bio(bio);
}

7
include/linux/dm-compress.h
View File

@ -29,6 +29,7 @@ static const u16 CBD_VERSION_MAJOR = 1;
static const u16 CBD_VERSION_MINOR = 1;
#define CBD_FLAG_DIRTY 0x01
#define CBD_FLAG_ERROR 0x02
enum cbd_alg {
CBD_ALG_NONE,
@ -523,11 +524,11 @@ bool cbd_alloc_pagev(struct page** pagev, size_t len);
void cbd_free_pagev(struct page** pagev, size_t len);
/* Core low-level I/O */
int pblk_read_wait(struct block_device* bdev,
int pblk_read_wait(struct cbd_params* params,
u64 pblk, u32 count, struct page** pagev);
int pblk_write_wait(struct block_device* bdev,
int pblk_write_wait(struct cbd_params* params,
u64 pblk, u32 count, struct page** pagev);
void pblk_write(struct block_device* bdev,
void pblk_write(struct cbd_params* params,
u64 pblk, u32 count, struct page** pagev);
struct pbat;