[PATCH v2 04/10] dm: reduce stack footprint dealing with block device names
From: Anton Suvorov
Date: Tue Jun 22 2021 - 13:44:54 EST
Stack usage reduced (measured with allyesconfig):
./drivers/md/dm-cache-target.c cache_ctr 392 328 -64
./drivers/md/dm-cache-target.c cache_io_hints 208 72 -136
./drivers/md/dm-clone-target.c clone_ctr 416 352 -64
./drivers/md/dm-clone-target.c clone_io_hints 216 80 -136
./drivers/md/dm-crypt.c crypt_convert_block_aead 408 272 -136
./drivers/md/dm-crypt.c kcryptd_async_done 192 56 -136
./drivers/md/dm-integrity.c integrity_metadata 872 808 -64
./drivers/md/dm-mpath.c parse_priority_group 368 304 -64
./drivers/md/dm-table.c device_area_is_invalid 216 80 -136
./drivers/md/dm-table.c dm_set_device_limits 200 72 -128
./drivers/md/dm-thin.c pool_io_hints 216 80 -136
Signed-off-by: Anton Suvorov <warwish@xxxxxxxxxxxxxx>
---
drivers/md/dm-cache-target.c | 10 ++++------
drivers/md/dm-clone-target.c | 10 ++++------
drivers/md/dm-crypt.c | 6 ++----
drivers/md/dm-integrity.c | 4 ++--
drivers/md/dm-mpath.c | 5 +----
drivers/md/dm-table.c | 34 ++++++++++++++++------------------
drivers/md/dm-thin.c | 8 +++-----
7 files changed, 32 insertions(+), 45 deletions(-)
diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c
index 6ab01ff25747..4c0230dcec71 100644
--- a/drivers/md/dm-cache-target.c
+++ b/drivers/md/dm-cache-target.c
@@ -2093,7 +2093,6 @@ static int parse_metadata_dev(struct cache_args *ca, struct dm_arg_set *as,
{
int r;
sector_t metadata_dev_size;
- char b[BDEVNAME_SIZE];
if (!at_least_one_arg(as, error))
return -EINVAL;
@@ -2107,8 +2106,8 @@ static int parse_metadata_dev(struct cache_args *ca, struct dm_arg_set *as,
metadata_dev_size = get_dev_size(ca->metadata_dev);
if (metadata_dev_size > DM_CACHE_METADATA_MAX_SECTORS_WARNING)
- DMWARN("Metadata device %s is larger than %u sectors: excess space will not be used.",
- bdevname(ca->metadata_dev->bdev, b), THIN_METADATA_MAX_SECTORS);
+ DMWARN("Metadata device %pg is larger than %u sectors: excess space will not be used.",
+ ca->metadata_dev->bdev, THIN_METADATA_MAX_SECTORS);
return 0;
}
@@ -3399,7 +3398,6 @@ static void disable_passdown_if_not_supported(struct cache *cache)
struct block_device *origin_bdev = cache->origin_dev->bdev;
struct queue_limits *origin_limits = &bdev_get_queue(origin_bdev)->limits;
const char *reason = NULL;
- char buf[BDEVNAME_SIZE];
if (!cache->features.discard_passdown)
return;
@@ -3411,8 +3409,8 @@ static void disable_passdown_if_not_supported(struct cache *cache)
reason = "max discard sectors smaller than a block";
if (reason) {
- DMWARN("Origin device (%s) %s: Disabling discard passdown.",
- bdevname(origin_bdev, buf), reason);
+ DMWARN("Origin device (%pg) %s: Disabling discard passdown.",
+ origin_bdev, reason);
cache->features.discard_passdown = false;
}
}
diff --git a/drivers/md/dm-clone-target.c b/drivers/md/dm-clone-target.c
index a90bdf9b2ca6..10e2e8d8fbec 100644
--- a/drivers/md/dm-clone-target.c
+++ b/drivers/md/dm-clone-target.c
@@ -1677,7 +1677,6 @@ static int parse_metadata_dev(struct clone *clone, struct dm_arg_set *as, char *
{
int r;
sector_t metadata_dev_size;
- char b[BDEVNAME_SIZE];
r = dm_get_device(clone->ti, dm_shift_arg(as), FMODE_READ | FMODE_WRITE,
&clone->metadata_dev);
@@ -1688,8 +1687,8 @@ static int parse_metadata_dev(struct clone *clone, struct dm_arg_set *as, char *
metadata_dev_size = get_dev_size(clone->metadata_dev);
if (metadata_dev_size > DM_CLONE_METADATA_MAX_SECTORS_WARNING)
- DMWARN("Metadata device %s is larger than %u sectors: excess space will not be used.",
- bdevname(clone->metadata_dev->bdev, b), DM_CLONE_METADATA_MAX_SECTORS);
+ DMWARN("Metadata device %pg is larger than %u sectors: excess space will not be used.",
+ clone->metadata_dev->bdev, DM_CLONE_METADATA_MAX_SECTORS);
return 0;
}
@@ -2028,7 +2027,6 @@ static void disable_passdown_if_not_supported(struct clone *clone)
struct block_device *dest_dev = clone->dest_dev->bdev;
struct queue_limits *dest_limits = &bdev_get_queue(dest_dev)->limits;
const char *reason = NULL;
- char buf[BDEVNAME_SIZE];
if (!test_bit(DM_CLONE_DISCARD_PASSDOWN, &clone->flags))
return;
@@ -2039,8 +2037,8 @@ static void disable_passdown_if_not_supported(struct clone *clone)
reason = "max discard sectors smaller than a region";
if (reason) {
- DMWARN("Destination device (%s) %s: Disabling discard passdown.",
- bdevname(dest_dev, buf), reason);
+ DMWARN("Destination device (%pg) %s: Disabling discard passdown.",
+ dest_dev, reason);
clear_bit(DM_CLONE_DISCARD_PASSDOWN, &clone->flags);
}
}
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 50f4cbd600d5..719137d41f3d 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -1361,8 +1361,7 @@ static int crypt_convert_block_aead(struct crypt_config *cc,
}
if (r == -EBADMSG) {
- char b[BDEVNAME_SIZE];
- DMERR_LIMIT("%s: INTEGRITY AEAD ERROR, sector %llu", bio_devname(ctx->bio_in, b),
+ DMERR_LIMIT("%pg: INTEGRITY AEAD ERROR, sector %llu", ctx->bio_in->bi_bdev,
(unsigned long long)le64_to_cpu(*sector));
}
@@ -2172,8 +2171,7 @@ static void kcryptd_async_done(struct crypto_async_request *async_req,
error = cc->iv_gen_ops->post(cc, org_iv_of_dmreq(cc, dmreq), dmreq);
if (error == -EBADMSG) {
- char b[BDEVNAME_SIZE];
- DMERR_LIMIT("%s: INTEGRITY AEAD ERROR, sector %llu", bio_devname(ctx->bio_in, b),
+ DMERR_LIMIT("%pg: INTEGRITY AEAD ERROR, sector %llu", ctx->bio_in->bi_bdev,
(unsigned long long)le64_to_cpu(*org_sector_of_dmreq(cc, dmreq)));
io->error = BLK_STS_PROTECTION;
} else if (error < 0)
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index 20f2510db1f6..d2fec41635ff 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -1781,8 +1781,8 @@ static void integrity_metadata(struct work_struct *w)
checksums_ptr - checksums, dio->op == REQ_OP_READ ? TAG_CMP : TAG_WRITE);
if (unlikely(r)) {
if (r > 0) {
- char b[BDEVNAME_SIZE];
- DMERR_LIMIT("%s: Checksum failed at sector 0x%llx", bio_devname(bio, b),
+ DMERR_LIMIT("%pg: Checksum failed at sector 0x%llx",
+ bio->bi_bdev,
(sector - ((r + ic->tag_size - 1) / ic->tag_size)));
r = -EILSEQ;
atomic64_inc(&ic->number_of_mismatches);
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index bced42f082b0..8d3ec771bb64 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -900,10 +900,7 @@ static int setup_scsi_dh(struct block_device *bdev, struct multipath *m,
if (m->hw_handler_name) {
r = scsi_dh_attach(q, m->hw_handler_name);
if (r == -EBUSY) {
- char b[BDEVNAME_SIZE];
-
- printk(KERN_INFO "dm-mpath: retaining handler on device %s\n",
- bdevname(bdev, b));
+ pr_info("dm-mpath: retaining handler on device %pg\n", bdev);
goto retain;
}
if (r < 0) {
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 0543cdf89e92..a9ce74b75990 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -230,15 +230,14 @@ static int device_area_is_invalid(struct dm_target *ti, struct dm_dev *dev,
i_size_read(bdev->bd_inode) >> SECTOR_SHIFT;
unsigned short logical_block_size_sectors =
limits->logical_block_size >> SECTOR_SHIFT;
- char b[BDEVNAME_SIZE];
if (!dev_size)
return 0;
if ((start >= dev_size) || (start + len > dev_size)) {
- DMWARN("%s: %s too small for target: "
+ DMWARN("%s: %pg too small for target: "
"start=%llu, len=%llu, dev_size=%llu",
- dm_device_name(ti->table->md), bdevname(bdev, b),
+ dm_device_name(ti->table->md), bdev,
(unsigned long long)start,
(unsigned long long)len,
(unsigned long long)dev_size);
@@ -253,10 +252,10 @@ static int device_area_is_invalid(struct dm_target *ti, struct dm_dev *dev,
unsigned int zone_sectors = bdev_zone_sectors(bdev);
if (start & (zone_sectors - 1)) {
- DMWARN("%s: start=%llu not aligned to h/w zone size %u of %s",
+ DMWARN("%s: start=%llu not aligned to h/w zone size %u of %pg",
dm_device_name(ti->table->md),
(unsigned long long)start,
- zone_sectors, bdevname(bdev, b));
+ zone_sectors, bdev);
return 1;
}
@@ -270,10 +269,10 @@ static int device_area_is_invalid(struct dm_target *ti, struct dm_dev *dev,
* the sector range.
*/
if (len & (zone_sectors - 1)) {
- DMWARN("%s: len=%llu not aligned to h/w zone size %u of %s",
+ DMWARN("%s: len=%llu not aligned to h/w zone size %u of %pg",
dm_device_name(ti->table->md),
(unsigned long long)len,
- zone_sectors, bdevname(bdev, b));
+ zone_sectors, bdev);
return 1;
}
}
@@ -282,20 +281,20 @@ static int device_area_is_invalid(struct dm_target *ti, struct dm_dev *dev,
return 0;
if (start & (logical_block_size_sectors - 1)) {
- DMWARN("%s: start=%llu not aligned to h/w "
- "logical block size %u of %s",
+ DMWARN("%s: start=%llu not aligned to h/w logical block size %u of %pg",
dm_device_name(ti->table->md),
(unsigned long long)start,
- limits->logical_block_size, bdevname(bdev, b));
+ limits->logical_block_size,
+ bdev);
return 1;
}
if (len & (logical_block_size_sectors - 1)) {
- DMWARN("%s: len=%llu not aligned to h/w "
- "logical block size %u of %s",
+ DMWARN("%s: len=%llu not aligned to h/w logical block size %u of %pg",
dm_device_name(ti->table->md),
(unsigned long long)len,
- limits->logical_block_size, bdevname(bdev, b));
+ limits->logical_block_size,
+ bdev);
return 1;
}
@@ -400,20 +399,19 @@ static int dm_set_device_limits(struct dm_target *ti, struct dm_dev *dev,
struct queue_limits *limits = data;
struct block_device *bdev = dev->bdev;
struct request_queue *q = bdev_get_queue(bdev);
- char b[BDEVNAME_SIZE];
if (unlikely(!q)) {
- DMWARN("%s: Cannot set limits for nonexistent device %s",
- dm_device_name(ti->table->md), bdevname(bdev, b));
+ DMWARN("%s: Cannot set limits for nonexistent device %pg",
+ dm_device_name(ti->table->md), bdev);
return 0;
}
if (blk_stack_limits(limits, &q->limits,
get_start_sect(bdev) + start) < 0)
- DMWARN("%s: adding target device %s caused an alignment inconsistency: "
+ DMWARN("%s: adding target device %pg caused an alignment inconsistency: "
"physical_block_size=%u, logical_block_size=%u, "
"alignment_offset=%u, start=%llu",
- dm_device_name(ti->table->md), bdevname(bdev, b),
+ dm_device_name(ti->table->md), bdev,
q->limits.physical_block_size,
q->limits.logical_block_size,
q->limits.alignment_offset,
diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index 985baee3a678..4ffe750341ad 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -2834,7 +2834,6 @@ static void disable_passdown_if_not_supported(struct pool_c *pt)
struct block_device *data_bdev = pt->data_dev->bdev;
struct queue_limits *data_limits = &bdev_get_queue(data_bdev)->limits;
const char *reason = NULL;
- char buf[BDEVNAME_SIZE];
if (!pt->adjusted_pf.discard_passdown)
return;
@@ -2846,7 +2845,7 @@ static void disable_passdown_if_not_supported(struct pool_c *pt)
reason = "max discard sectors smaller than a block";
if (reason) {
- DMWARN("Data device (%s) %s: Disabling discard passdown.", bdevname(data_bdev, buf), reason);
+ DMWARN("Data device (%pg) %s: Disabling discard passdown.", data_bdev, reason);
pt->adjusted_pf.discard_passdown = false;
}
}
@@ -3218,11 +3217,10 @@ static sector_t get_dev_size(struct block_device *bdev)
static void warn_if_metadata_device_too_big(struct block_device *bdev)
{
sector_t metadata_dev_size = get_dev_size(bdev);
- char buffer[BDEVNAME_SIZE];
if (metadata_dev_size > THIN_METADATA_MAX_SECTORS_WARNING)
- DMWARN("Metadata device %s is larger than %u sectors: excess space will not be used.",
- bdevname(bdev, buffer), THIN_METADATA_MAX_SECTORS);
+ DMWARN("Metadata device %pg is larger than %u sectors: excess space will not be used.",
+ bdev, THIN_METADATA_MAX_SECTORS);
}
static sector_t get_metadata_dev_size(struct block_device *bdev)
--
2.25.1