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path: root/drivers/md/dm-verity-target.c
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Diffstat (limited to 'drivers/md/dm-verity-target.c')
-rw-r--r--drivers/md/dm-verity-target.c83
1 files changed, 41 insertions, 42 deletions
diff --git a/drivers/md/dm-verity-target.c b/drivers/md/dm-verity-target.c
index ccf5b852fbf7..ade83ef3b439 100644
--- a/drivers/md/dm-verity-target.c
+++ b/drivers/md/dm-verity-target.c
@@ -41,9 +41,9 @@
#define DM_VERITY_OPTS_MAX (4 + DM_VERITY_OPTS_FEC + \
DM_VERITY_ROOT_HASH_VERIFICATION_OPTS)
-static unsigned dm_verity_prefetch_cluster = DM_VERITY_DEFAULT_PREFETCH_SIZE;
+static unsigned int dm_verity_prefetch_cluster = DM_VERITY_DEFAULT_PREFETCH_SIZE;
-module_param_named(prefetch_cluster, dm_verity_prefetch_cluster, uint, S_IRUGO | S_IWUSR);
+module_param_named(prefetch_cluster, dm_verity_prefetch_cluster, uint, 0644);
static DEFINE_STATIC_KEY_FALSE(use_tasklet_enabled);
@@ -51,7 +51,7 @@ struct dm_verity_prefetch_work {
struct work_struct work;
struct dm_verity *v;
sector_t block;
- unsigned n_blocks;
+ unsigned int n_blocks;
};
/*
@@ -110,22 +110,24 @@ static int verity_hash_update(struct dm_verity *v, struct ahash_request *req,
sg_init_one(&sg, data, len);
ahash_request_set_crypt(req, &sg, NULL, len);
return crypto_wait_req(crypto_ahash_update(req), wait);
- } else {
- do {
- int r;
- size_t this_step = min_t(size_t, len, PAGE_SIZE - offset_in_page(data));
- flush_kernel_vmap_range((void *)data, this_step);
- sg_init_table(&sg, 1);
- sg_set_page(&sg, vmalloc_to_page(data), this_step, offset_in_page(data));
- ahash_request_set_crypt(req, &sg, NULL, this_step);
- r = crypto_wait_req(crypto_ahash_update(req), wait);
- if (unlikely(r))
- return r;
- data += this_step;
- len -= this_step;
- } while (len);
- return 0;
}
+
+ do {
+ int r;
+ size_t this_step = min_t(size_t, len, PAGE_SIZE - offset_in_page(data));
+
+ flush_kernel_vmap_range((void *)data, this_step);
+ sg_init_table(&sg, 1);
+ sg_set_page(&sg, vmalloc_to_page(data), this_step, offset_in_page(data));
+ ahash_request_set_crypt(req, &sg, NULL, this_step);
+ r = crypto_wait_req(crypto_ahash_update(req), wait);
+ if (unlikely(r))
+ return r;
+ data += this_step;
+ len -= this_step;
+ } while (len);
+
+ return 0;
}
/*
@@ -164,7 +166,7 @@ static int verity_hash_final(struct dm_verity *v, struct ahash_request *req,
r = verity_hash_update(v, req, v->salt, v->salt_size, wait);
if (r < 0) {
- DMERR("verity_hash_final failed updating salt: %d", r);
+ DMERR("%s failed updating salt: %d", __func__, r);
goto out;
}
}
@@ -196,10 +198,10 @@ out:
}
static void verity_hash_at_level(struct dm_verity *v, sector_t block, int level,
- sector_t *hash_block, unsigned *offset)
+ sector_t *hash_block, unsigned int *offset)
{
sector_t position = verity_position_at_level(v, block, level);
- unsigned idx;
+ unsigned int idx;
*hash_block = v->hash_level_block[level] + (position >> v->hash_per_block_bits);
@@ -287,7 +289,7 @@ static int verity_verify_level(struct dm_verity *v, struct dm_verity_io *io,
u8 *data;
int r;
sector_t hash_block;
- unsigned offset;
+ unsigned int offset;
verity_hash_at_level(v, block, level, &hash_block, &offset);
@@ -332,10 +334,8 @@ static int verity_verify_level(struct dm_verity *v, struct dm_verity_io *io,
*/
r = -EAGAIN;
goto release_ret_r;
- }
- else if (verity_fec_decode(v, io,
- DM_VERITY_BLOCK_TYPE_METADATA,
- hash_block, data, NULL) == 0)
+ } else if (verity_fec_decode(v, io, DM_VERITY_BLOCK_TYPE_METADATA,
+ hash_block, data, NULL) == 0)
aux->hash_verified = 1;
else if (verity_handle_err(v,
DM_VERITY_BLOCK_TYPE_METADATA,
@@ -424,7 +424,7 @@ static int verity_for_io_block(struct dm_verity *v, struct dm_verity_io *io,
r = crypto_wait_req(crypto_ahash_update(req), wait);
if (unlikely(r < 0)) {
- DMERR("verity_for_io_block crypto op failed: %d", r);
+ DMERR("%s crypto op failed: %d", __func__, r);
return r;
}
@@ -445,13 +445,13 @@ int verity_for_bv_block(struct dm_verity *v, struct dm_verity_io *io,
struct dm_verity_io *io, u8 *data,
size_t len))
{
- unsigned todo = 1 << v->data_dev_block_bits;
+ unsigned int todo = 1 << v->data_dev_block_bits;
struct bio *bio = dm_bio_from_per_bio_data(io, v->ti->per_io_data_size);
do {
int r;
u8 *page;
- unsigned len;
+ unsigned int len;
struct bio_vec bv = bio_iter_iovec(bio, *iter);
page = bvec_kmap_local(&bv);
@@ -685,10 +685,12 @@ static void verity_prefetch_io(struct work_struct *work)
for (i = v->levels - 2; i >= 0; i--) {
sector_t hash_block_start;
sector_t hash_block_end;
+
verity_hash_at_level(v, pw->block, i, &hash_block_start, NULL);
verity_hash_at_level(v, pw->block + pw->n_blocks - 1, i, &hash_block_end, NULL);
+
if (!i) {
- unsigned cluster = READ_ONCE(dm_verity_prefetch_cluster);
+ unsigned int cluster = READ_ONCE(dm_verity_prefetch_cluster);
cluster >>= v->data_dev_block_bits;
if (unlikely(!cluster))
@@ -753,7 +755,7 @@ static int verity_map(struct dm_target *ti, struct bio *bio)
bio_set_dev(bio, v->data_dev->bdev);
bio->bi_iter.bi_sector = verity_map_sector(v, bio->bi_iter.bi_sector);
- if (((unsigned)bio->bi_iter.bi_sector | bio_sectors(bio)) &
+ if (((unsigned int)bio->bi_iter.bi_sector | bio_sectors(bio)) &
((1 << (v->data_dev_block_bits - SECTOR_SHIFT)) - 1)) {
DMERR_LIMIT("unaligned io");
return DM_MAPIO_KILL;
@@ -789,12 +791,12 @@ static int verity_map(struct dm_target *ti, struct bio *bio)
* Status: V (valid) or C (corruption found)
*/
static void verity_status(struct dm_target *ti, status_type_t type,
- unsigned status_flags, char *result, unsigned maxlen)
+ unsigned int status_flags, char *result, unsigned int maxlen)
{
struct dm_verity *v = ti->private;
- unsigned args = 0;
- unsigned sz = 0;
- unsigned x;
+ unsigned int args = 0;
+ unsigned int sz = 0;
+ unsigned int x;
switch (type) {
case STATUSTYPE_INFO:
@@ -1054,7 +1056,7 @@ static int verity_parse_opt_args(struct dm_arg_set *as, struct dm_verity *v,
bool only_modifier_opts)
{
int r = 0;
- unsigned argc;
+ unsigned int argc;
struct dm_target *ti = v->ti;
const char *arg_name;
@@ -1156,13 +1158,12 @@ static int verity_parse_opt_args(struct dm_arg_set *as, struct dm_verity *v,
* <digest>
* <salt> Hex string or "-" if no salt.
*/
-static int verity_ctr(struct dm_target *ti, unsigned argc, char **argv)
+static int verity_ctr(struct dm_target *ti, unsigned int argc, char **argv)
{
struct dm_verity *v;
struct dm_verity_sig_opts verify_args = {0};
struct dm_arg_set as;
unsigned int num;
- unsigned int wq_flags;
unsigned long long num_ll;
int r;
int i;
@@ -1370,6 +1371,7 @@ static int verity_ctr(struct dm_target *ti, unsigned argc, char **argv)
hash_position = v->hash_start;
for (i = v->levels - 1; i >= 0; i--) {
sector_t s;
+
v->hash_level_block[i] = hash_position;
s = (v->data_blocks + ((sector_t)1 << ((i + 1) * v->hash_per_block_bits)) - 1)
>> ((i + 1) * v->hash_per_block_bits);
@@ -1399,8 +1401,6 @@ static int verity_ctr(struct dm_target *ti, unsigned argc, char **argv)
goto bad;
}
- /* WQ_UNBOUND greatly improves performance when running on ramdisk */
- wq_flags = WQ_MEM_RECLAIM | WQ_UNBOUND;
/*
* Using WQ_HIGHPRI improves throughput and completion latency by
* reducing wait times when reading from a dm-verity device.
@@ -1410,8 +1410,7 @@ static int verity_ctr(struct dm_target *ti, unsigned argc, char **argv)
* will fall-back to using it for error handling (or if the bufio cache
* doesn't have required hashes).
*/
- wq_flags |= WQ_HIGHPRI;
- v->verify_wq = alloc_workqueue("kverityd", wq_flags, num_online_cpus());
+ v->verify_wq = alloc_workqueue("kverityd", WQ_MEM_RECLAIM | WQ_HIGHPRI, 0);
if (!v->verify_wq) {
ti->error = "Cannot allocate workqueue";
r = -ENOMEM;
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-17 06:44:43 +0300