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Diffstat (limited to 'kernel/drivers/md/dm-log-writes.c')
-rw-r--r--kernel/drivers/md/dm-log-writes.c55
1 files changed, 20 insertions, 35 deletions
diff --git a/kernel/drivers/md/dm-log-writes.c b/kernel/drivers/md/dm-log-writes.c
index 93e08446a..624589d51 100644
--- a/kernel/drivers/md/dm-log-writes.c
+++ b/kernel/drivers/md/dm-log-writes.c
@@ -55,8 +55,8 @@
#define LOG_DISCARD_FLAG (1 << 2)
#define LOG_MARK_FLAG (1 << 3)
-#define WRITE_LOG_VERSION 1
-#define WRITE_LOG_MAGIC 0x6a736677736872
+#define WRITE_LOG_VERSION 1ULL
+#define WRITE_LOG_MAGIC 0x6a736677736872ULL
/*
* The disk format for this is braindead simple.
@@ -146,16 +146,16 @@ static void put_io_block(struct log_writes_c *lc)
}
}
-static void log_end_io(struct bio *bio, int err)
+static void log_end_io(struct bio *bio)
{
struct log_writes_c *lc = bio->bi_private;
struct bio_vec *bvec;
int i;
- if (err) {
+ if (bio->bi_error) {
unsigned long flags;
- DMERR("Error writing log block, error=%d", err);
+ DMERR("Error writing log block, error=%d", bio->bi_error);
spin_lock_irqsave(&lc->blocks_lock, flags);
lc->logging_enabled = false;
spin_unlock_irqrestore(&lc->blocks_lock, flags);
@@ -205,7 +205,6 @@ static int write_metadata(struct log_writes_c *lc, void *entry,
bio->bi_bdev = lc->logdev->bdev;
bio->bi_end_io = log_end_io;
bio->bi_private = lc;
- set_bit(BIO_UPTODATE, &bio->bi_flags);
page = alloc_page(GFP_KERNEL);
if (!page) {
@@ -270,7 +269,6 @@ static int log_one_block(struct log_writes_c *lc,
bio->bi_bdev = lc->logdev->bdev;
bio->bi_end_io = log_end_io;
bio->bi_private = lc;
- set_bit(BIO_UPTODATE, &bio->bi_flags);
for (i = 0; i < block->vec_cnt; i++) {
/*
@@ -292,7 +290,6 @@ static int log_one_block(struct log_writes_c *lc,
bio->bi_bdev = lc->logdev->bdev;
bio->bi_end_io = log_end_io;
bio->bi_private = lc;
- set_bit(BIO_UPTODATE, &bio->bi_flags);
ret = bio_add_page(bio, block->vecs[i].bv_page,
block->vecs[i].bv_len, 0);
@@ -420,6 +417,7 @@ static int log_writes_ctr(struct dm_target *ti, unsigned int argc, char **argv)
struct log_writes_c *lc;
struct dm_arg_set as;
const char *devname, *logdevname;
+ int ret;
as.argc = argc;
as.argv = argv;
@@ -443,18 +441,22 @@ static int log_writes_ctr(struct dm_target *ti, unsigned int argc, char **argv)
atomic_set(&lc->pending_blocks, 0);
devname = dm_shift_arg(&as);
- if (dm_get_device(ti, devname, dm_table_get_mode(ti->table), &lc->dev)) {
+ ret = dm_get_device(ti, devname, dm_table_get_mode(ti->table), &lc->dev);
+ if (ret) {
ti->error = "Device lookup failed";
goto bad;
}
logdevname = dm_shift_arg(&as);
- if (dm_get_device(ti, logdevname, dm_table_get_mode(ti->table), &lc->logdev)) {
+ ret = dm_get_device(ti, logdevname, dm_table_get_mode(ti->table),
+ &lc->logdev);
+ if (ret) {
ti->error = "Log device lookup failed";
dm_put_device(ti, lc->dev);
goto bad;
}
+ ret = -EINVAL;
lc->log_kthread = kthread_run(log_writes_kthread, lc, "log-write");
if (!lc->log_kthread) {
ti->error = "Couldn't alloc kthread";
@@ -479,7 +481,7 @@ static int log_writes_ctr(struct dm_target *ti, unsigned int argc, char **argv)
bad:
kfree(lc);
- return -EINVAL;
+ return ret;
}
static int log_mark(struct log_writes_c *lc, char *data)
@@ -606,7 +608,7 @@ static int log_writes_map(struct dm_target *ti, struct bio *bio)
WARN_ON(flush_bio || fua_bio);
if (lc->device_supports_discard)
goto map_bio;
- bio_endio(bio, 0);
+ bio_endio(bio);
return DM_MAPIO_SUBMITTED;
}
@@ -712,35 +714,19 @@ static void log_writes_status(struct dm_target *ti, status_type_t type,
}
}
-static int log_writes_ioctl(struct dm_target *ti, unsigned int cmd,
- unsigned long arg)
+static int log_writes_prepare_ioctl(struct dm_target *ti,
+ struct block_device **bdev, fmode_t *mode)
{
struct log_writes_c *lc = ti->private;
struct dm_dev *dev = lc->dev;
- int r = 0;
+ *bdev = dev->bdev;
/*
* Only pass ioctls through if the device sizes match exactly.
*/
if (ti->len != i_size_read(dev->bdev->bd_inode) >> SECTOR_SHIFT)
- r = scsi_verify_blk_ioctl(NULL, cmd);
-
- return r ? : __blkdev_driver_ioctl(dev->bdev, dev->mode, cmd, arg);
-}
-
-static int log_writes_merge(struct dm_target *ti, struct bvec_merge_data *bvm,
- struct bio_vec *biovec, int max_size)
-{
- struct log_writes_c *lc = ti->private;
- struct request_queue *q = bdev_get_queue(lc->dev->bdev);
-
- if (!q->merge_bvec_fn)
- return max_size;
-
- bvm->bi_bdev = lc->dev->bdev;
- bvm->bi_sector = dm_target_offset(ti, bvm->bi_sector);
-
- return min(max_size, q->merge_bvec_fn(q, bvm, biovec));
+ return 1;
+ return 0;
}
static int log_writes_iterate_devices(struct dm_target *ti,
@@ -795,8 +781,7 @@ static struct target_type log_writes_target = {
.map = log_writes_map,
.end_io = normal_end_io,
.status = log_writes_status,
- .ioctl = log_writes_ioctl,
- .merge = log_writes_merge,
+ .prepare_ioctl = log_writes_prepare_ioctl,
.message = log_writes_message,
.iterate_devices = log_writes_iterate_devices,
.io_hints = log_writes_io_hints,