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path: root/drivers/md/dm-raid1.c
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Diffstat (limited to 'drivers/md/dm-raid1.c')
-rw-r--r--drivers/md/dm-raid1.c97
1 files changed, 49 insertions, 48 deletions
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index d12cf3e5e076..be48cedf986b 100644
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -20,6 +20,8 @@
#include <linux/vmalloc.h>
#include <linux/workqueue.h>
+#define DM_MSG_PREFIX "raid1"
+
static struct workqueue_struct *_kmirrord_wq;
static struct work_struct _kmirrord_work;
@@ -106,12 +108,42 @@ struct region {
struct bio_list delayed_bios;
};
+
+/*-----------------------------------------------------------------
+ * Mirror set structures.
+ *---------------------------------------------------------------*/
+struct mirror {
+ atomic_t error_count;
+ struct dm_dev *dev;
+ sector_t offset;
+};
+
+struct mirror_set {
+ struct dm_target *ti;
+ struct list_head list;
+ struct region_hash rh;
+ struct kcopyd_client *kcopyd_client;
+
+ spinlock_t lock; /* protects the next two lists */
+ struct bio_list reads;
+ struct bio_list writes;
+
+ /* recovery */
+ region_t nr_regions;
+ int in_sync;
+
+ struct mirror *default_mirror; /* Default mirror */
+
+ unsigned int nr_mirrors;
+ struct mirror mirror[0];
+};
+
/*
* Conversion fns
*/
static inline region_t bio_to_region(struct region_hash *rh, struct bio *bio)
{
- return bio->bi_sector >> rh->region_shift;
+ return (bio->bi_sector - rh->ms->ti->begin) >> rh->region_shift;
}
static inline sector_t region_to_sector(struct region_hash *rh, region_t region)
@@ -458,11 +490,9 @@ static int __rh_recovery_prepare(struct region_hash *rh)
/* Already quiesced ? */
if (atomic_read(&reg->pending))
list_del_init(&reg->list);
+ else
+ list_move(&reg->list, &rh->quiesced_regions);
- else {
- list_del_init(&reg->list);
- list_add(&reg->list, &rh->quiesced_regions);
- }
spin_unlock_irq(&rh->region_lock);
return 1;
@@ -541,35 +571,6 @@ static void rh_start_recovery(struct region_hash *rh)
wake();
}
-/*-----------------------------------------------------------------
- * Mirror set structures.
- *---------------------------------------------------------------*/
-struct mirror {
- atomic_t error_count;
- struct dm_dev *dev;
- sector_t offset;
-};
-
-struct mirror_set {
- struct dm_target *ti;
- struct list_head list;
- struct region_hash rh;
- struct kcopyd_client *kcopyd_client;
-
- spinlock_t lock; /* protects the next two lists */
- struct bio_list reads;
- struct bio_list writes;
-
- /* recovery */
- region_t nr_regions;
- int in_sync;
-
- struct mirror *default_mirror; /* Default mirror */
-
- unsigned int nr_mirrors;
- struct mirror mirror[0];
-};
-
/*
* Every mirror should look like this one.
*/
@@ -603,7 +604,7 @@ static void recovery_complete(int read_err, unsigned int write_err,
struct region *reg = (struct region *) context;
/* FIXME: better error handling */
- rh_recovery_end(reg, read_err || write_err);
+ rh_recovery_end(reg, !(read_err || write_err));
}
static int recover(struct mirror_set *ms, struct region *reg)
@@ -893,7 +894,7 @@ static struct mirror_set *alloc_context(unsigned int nr_mirrors,
ms = kmalloc(len, GFP_KERNEL);
if (!ms) {
- ti->error = "dm-mirror: Cannot allocate mirror context";
+ ti->error = "Cannot allocate mirror context";
return NULL;
}
@@ -907,7 +908,7 @@ static struct mirror_set *alloc_context(unsigned int nr_mirrors,
ms->default_mirror = &ms->mirror[DEFAULT_MIRROR];
if (rh_init(&ms->rh, ms, dl, region_size, ms->nr_regions)) {
- ti->error = "dm-mirror: Error creating dirty region hash";
+ ti->error = "Error creating dirty region hash";
kfree(ms);
return NULL;
}
@@ -937,14 +938,14 @@ static int get_mirror(struct mirror_set *ms, struct dm_target *ti,
unsigned long long offset;
if (sscanf(argv[1], "%llu", &offset) != 1) {
- ti->error = "dm-mirror: Invalid offset";
+ ti->error = "Invalid offset";
return -EINVAL;
}
if (dm_get_device(ti, argv[0], offset, ti->len,
dm_table_get_mode(ti->table),
&ms->mirror[mirror].dev)) {
- ti->error = "dm-mirror: Device lookup failure";
+ ti->error = "Device lookup failure";
return -ENXIO;
}
@@ -981,30 +982,30 @@ static struct dirty_log *create_dirty_log(struct dm_target *ti,
struct dirty_log *dl;
if (argc < 2) {
- ti->error = "dm-mirror: Insufficient mirror log arguments";
+ ti->error = "Insufficient mirror log arguments";
return NULL;
}
if (sscanf(argv[1], "%u", &param_count) != 1) {
- ti->error = "dm-mirror: Invalid mirror log argument count";
+ ti->error = "Invalid mirror log argument count";
return NULL;
}
*args_used = 2 + param_count;
if (argc < *args_used) {
- ti->error = "dm-mirror: Insufficient mirror log arguments";
+ ti->error = "Insufficient mirror log arguments";
return NULL;
}
dl = dm_create_dirty_log(argv[0], ti, param_count, argv + 2);
if (!dl) {
- ti->error = "dm-mirror: Error creating mirror dirty log";
+ ti->error = "Error creating mirror dirty log";
return NULL;
}
if (!_check_region_size(ti, dl->type->get_region_size(dl))) {
- ti->error = "dm-mirror: Invalid region size";
+ ti->error = "Invalid region size";
dm_destroy_dirty_log(dl);
return NULL;
}
@@ -1038,7 +1039,7 @@ static int mirror_ctr(struct dm_target *ti, unsigned int argc, char **argv)
if (!argc || sscanf(argv[0], "%u", &nr_mirrors) != 1 ||
nr_mirrors < 2 || nr_mirrors > KCOPYD_MAX_REGIONS + 1) {
- ti->error = "dm-mirror: Invalid number of mirrors";
+ ti->error = "Invalid number of mirrors";
dm_destroy_dirty_log(dl);
return -EINVAL;
}
@@ -1046,7 +1047,7 @@ static int mirror_ctr(struct dm_target *ti, unsigned int argc, char **argv)
argv++, argc--;
if (argc != nr_mirrors * 2) {
- ti->error = "dm-mirror: Wrong number of mirror arguments";
+ ti->error = "Wrong number of mirror arguments";
dm_destroy_dirty_log(dl);
return -EINVAL;
}
@@ -1115,7 +1116,7 @@ static int mirror_map(struct dm_target *ti, struct bio *bio,
struct mirror *m;
struct mirror_set *ms = ti->private;
- map_context->ll = bio->bi_sector >> ms->rh.region_shift;
+ map_context->ll = bio_to_region(&ms->rh, bio);
if (rw == WRITE) {
queue_bio(ms, bio, rw);
@@ -1221,7 +1222,7 @@ static int mirror_status(struct dm_target *ti, status_type_t type,
static struct target_type mirror_target = {
.name = "mirror",
- .version = {1, 0, 1},
+ .version = {1, 0, 2},
.module = THIS_MODULE,
.ctr = mirror_ctr,
.dtr = mirror_dtr,
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-27 10:04:55 +0100