diff options
Diffstat (limited to 'drivers/md/kcopyd.c')
-rw-r--r-- | drivers/md/kcopyd.c | 51 |
1 files changed, 25 insertions, 26 deletions
diff --git a/drivers/md/kcopyd.c b/drivers/md/kcopyd.c index 21fea42c68c4..4f2c61acf7c6 100644 --- a/drivers/md/kcopyd.c +++ b/drivers/md/kcopyd.c | |||
@@ -9,9 +9,8 @@ | |||
9 | * completion notification. | 9 | * completion notification. |
10 | */ | 10 | */ |
11 | 11 | ||
12 | #include <asm/types.h> | 12 | #include <linux/types.h> |
13 | #include <asm/atomic.h> | 13 | #include <asm/atomic.h> |
14 | |||
15 | #include <linux/blkdev.h> | 14 | #include <linux/blkdev.h> |
16 | #include <linux/fs.h> | 15 | #include <linux/fs.h> |
17 | #include <linux/init.h> | 16 | #include <linux/init.h> |
@@ -39,7 +38,7 @@ static void wake(void) | |||
39 | * Each kcopyd client has its own little pool of preallocated | 38 | * Each kcopyd client has its own little pool of preallocated |
40 | * pages for kcopyd io. | 39 | * pages for kcopyd io. |
41 | *---------------------------------------------------------------*/ | 40 | *---------------------------------------------------------------*/ |
42 | struct kcopyd_client { | 41 | struct dm_kcopyd_client { |
43 | struct list_head list; | 42 | struct list_head list; |
44 | 43 | ||
45 | spinlock_t lock; | 44 | spinlock_t lock; |
@@ -76,7 +75,7 @@ static void free_pl(struct page_list *pl) | |||
76 | kfree(pl); | 75 | kfree(pl); |
77 | } | 76 | } |
78 | 77 | ||
79 | static int kcopyd_get_pages(struct kcopyd_client *kc, | 78 | static int kcopyd_get_pages(struct dm_kcopyd_client *kc, |
80 | unsigned int nr, struct page_list **pages) | 79 | unsigned int nr, struct page_list **pages) |
81 | { | 80 | { |
82 | struct page_list *pl; | 81 | struct page_list *pl; |
@@ -99,7 +98,7 @@ static int kcopyd_get_pages(struct kcopyd_client *kc, | |||
99 | return 0; | 98 | return 0; |
100 | } | 99 | } |
101 | 100 | ||
102 | static void kcopyd_put_pages(struct kcopyd_client *kc, struct page_list *pl) | 101 | static void kcopyd_put_pages(struct dm_kcopyd_client *kc, struct page_list *pl) |
103 | { | 102 | { |
104 | struct page_list *cursor; | 103 | struct page_list *cursor; |
105 | 104 | ||
@@ -127,7 +126,7 @@ static void drop_pages(struct page_list *pl) | |||
127 | } | 126 | } |
128 | } | 127 | } |
129 | 128 | ||
130 | static int client_alloc_pages(struct kcopyd_client *kc, unsigned int nr) | 129 | static int client_alloc_pages(struct dm_kcopyd_client *kc, unsigned int nr) |
131 | { | 130 | { |
132 | unsigned int i; | 131 | unsigned int i; |
133 | struct page_list *pl = NULL, *next; | 132 | struct page_list *pl = NULL, *next; |
@@ -148,7 +147,7 @@ static int client_alloc_pages(struct kcopyd_client *kc, unsigned int nr) | |||
148 | return 0; | 147 | return 0; |
149 | } | 148 | } |
150 | 149 | ||
151 | static void client_free_pages(struct kcopyd_client *kc) | 150 | static void client_free_pages(struct dm_kcopyd_client *kc) |
152 | { | 151 | { |
153 | BUG_ON(kc->nr_free_pages != kc->nr_pages); | 152 | BUG_ON(kc->nr_free_pages != kc->nr_pages); |
154 | drop_pages(kc->pages); | 153 | drop_pages(kc->pages); |
@@ -162,7 +161,7 @@ static void client_free_pages(struct kcopyd_client *kc) | |||
162 | * ever having to do io (which could cause a deadlock). | 161 | * ever having to do io (which could cause a deadlock). |
163 | *---------------------------------------------------------------*/ | 162 | *---------------------------------------------------------------*/ |
164 | struct kcopyd_job { | 163 | struct kcopyd_job { |
165 | struct kcopyd_client *kc; | 164 | struct dm_kcopyd_client *kc; |
166 | struct list_head list; | 165 | struct list_head list; |
167 | unsigned long flags; | 166 | unsigned long flags; |
168 | 167 | ||
@@ -182,7 +181,7 @@ struct kcopyd_job { | |||
182 | * The destinations for the transfer. | 181 | * The destinations for the transfer. |
183 | */ | 182 | */ |
184 | unsigned int num_dests; | 183 | unsigned int num_dests; |
185 | struct dm_io_region dests[KCOPYD_MAX_REGIONS]; | 184 | struct dm_io_region dests[DM_KCOPYD_MAX_REGIONS]; |
186 | 185 | ||
187 | sector_t offset; | 186 | sector_t offset; |
188 | unsigned int nr_pages; | 187 | unsigned int nr_pages; |
@@ -192,7 +191,7 @@ struct kcopyd_job { | |||
192 | * Set this to ensure you are notified when the job has | 191 | * Set this to ensure you are notified when the job has |
193 | * completed. 'context' is for callback to use. | 192 | * completed. 'context' is for callback to use. |
194 | */ | 193 | */ |
195 | kcopyd_notify_fn fn; | 194 | dm_kcopyd_notify_fn fn; |
196 | void *context; | 195 | void *context; |
197 | 196 | ||
198 | /* | 197 | /* |
@@ -295,8 +294,8 @@ static int run_complete_job(struct kcopyd_job *job) | |||
295 | void *context = job->context; | 294 | void *context = job->context; |
296 | int read_err = job->read_err; | 295 | int read_err = job->read_err; |
297 | unsigned long write_err = job->write_err; | 296 | unsigned long write_err = job->write_err; |
298 | kcopyd_notify_fn fn = job->fn; | 297 | dm_kcopyd_notify_fn fn = job->fn; |
299 | struct kcopyd_client *kc = job->kc; | 298 | struct dm_kcopyd_client *kc = job->kc; |
300 | 299 | ||
301 | kcopyd_put_pages(kc, job->pages); | 300 | kcopyd_put_pages(kc, job->pages); |
302 | mempool_free(job, _job_pool); | 301 | mempool_free(job, _job_pool); |
@@ -318,7 +317,7 @@ static void complete_io(unsigned long error, void *context) | |||
318 | else | 317 | else |
319 | job->read_err = 1; | 318 | job->read_err = 1; |
320 | 319 | ||
321 | if (!test_bit(KCOPYD_IGNORE_ERROR, &job->flags)) { | 320 | if (!test_bit(DM_KCOPYD_IGNORE_ERROR, &job->flags)) { |
322 | push(&_complete_jobs, job); | 321 | push(&_complete_jobs, job); |
323 | wake(); | 322 | wake(); |
324 | return; | 323 | return; |
@@ -470,7 +469,7 @@ static void segment_complete(int read_err, unsigned long write_err, | |||
470 | * Only dispatch more work if there hasn't been an error. | 469 | * Only dispatch more work if there hasn't been an error. |
471 | */ | 470 | */ |
472 | if ((!job->read_err && !job->write_err) || | 471 | if ((!job->read_err && !job->write_err) || |
473 | test_bit(KCOPYD_IGNORE_ERROR, &job->flags)) { | 472 | test_bit(DM_KCOPYD_IGNORE_ERROR, &job->flags)) { |
474 | /* get the next chunk of work */ | 473 | /* get the next chunk of work */ |
475 | progress = job->progress; | 474 | progress = job->progress; |
476 | count = job->source.count - progress; | 475 | count = job->source.count - progress; |
@@ -527,9 +526,9 @@ static void split_job(struct kcopyd_job *job) | |||
527 | segment_complete(0, 0u, job); | 526 | segment_complete(0, 0u, job); |
528 | } | 527 | } |
529 | 528 | ||
530 | int kcopyd_copy(struct kcopyd_client *kc, struct dm_io_region *from, | 529 | int dm_kcopyd_copy(struct dm_kcopyd_client *kc, struct dm_io_region *from, |
531 | unsigned int num_dests, struct dm_io_region *dests, | 530 | unsigned int num_dests, struct dm_io_region *dests, |
532 | unsigned int flags, kcopyd_notify_fn fn, void *context) | 531 | unsigned int flags, dm_kcopyd_notify_fn fn, void *context) |
533 | { | 532 | { |
534 | struct kcopyd_job *job; | 533 | struct kcopyd_job *job; |
535 | 534 | ||
@@ -570,6 +569,7 @@ int kcopyd_copy(struct kcopyd_client *kc, struct dm_io_region *from, | |||
570 | 569 | ||
571 | return 0; | 570 | return 0; |
572 | } | 571 | } |
572 | EXPORT_SYMBOL(dm_kcopyd_copy); | ||
573 | 573 | ||
574 | /* | 574 | /* |
575 | * Cancels a kcopyd job, eg. someone might be deactivating a | 575 | * Cancels a kcopyd job, eg. someone might be deactivating a |
@@ -589,14 +589,14 @@ int kcopyd_cancel(struct kcopyd_job *job, int block) | |||
589 | static DEFINE_MUTEX(_client_lock); | 589 | static DEFINE_MUTEX(_client_lock); |
590 | static LIST_HEAD(_clients); | 590 | static LIST_HEAD(_clients); |
591 | 591 | ||
592 | static void client_add(struct kcopyd_client *kc) | 592 | static void client_add(struct dm_kcopyd_client *kc) |
593 | { | 593 | { |
594 | mutex_lock(&_client_lock); | 594 | mutex_lock(&_client_lock); |
595 | list_add(&kc->list, &_clients); | 595 | list_add(&kc->list, &_clients); |
596 | mutex_unlock(&_client_lock); | 596 | mutex_unlock(&_client_lock); |
597 | } | 597 | } |
598 | 598 | ||
599 | static void client_del(struct kcopyd_client *kc) | 599 | static void client_del(struct dm_kcopyd_client *kc) |
600 | { | 600 | { |
601 | mutex_lock(&_client_lock); | 601 | mutex_lock(&_client_lock); |
602 | list_del(&kc->list); | 602 | list_del(&kc->list); |
@@ -650,10 +650,11 @@ static void kcopyd_exit(void) | |||
650 | mutex_unlock(&kcopyd_init_lock); | 650 | mutex_unlock(&kcopyd_init_lock); |
651 | } | 651 | } |
652 | 652 | ||
653 | int kcopyd_client_create(unsigned int nr_pages, struct kcopyd_client **result) | 653 | int dm_kcopyd_client_create(unsigned int nr_pages, |
654 | struct dm_kcopyd_client **result) | ||
654 | { | 655 | { |
655 | int r = 0; | 656 | int r = 0; |
656 | struct kcopyd_client *kc; | 657 | struct dm_kcopyd_client *kc; |
657 | 658 | ||
658 | r = kcopyd_init(); | 659 | r = kcopyd_init(); |
659 | if (r) | 660 | if (r) |
@@ -691,8 +692,9 @@ int kcopyd_client_create(unsigned int nr_pages, struct kcopyd_client **result) | |||
691 | *result = kc; | 692 | *result = kc; |
692 | return 0; | 693 | return 0; |
693 | } | 694 | } |
695 | EXPORT_SYMBOL(dm_kcopyd_client_create); | ||
694 | 696 | ||
695 | void kcopyd_client_destroy(struct kcopyd_client *kc) | 697 | void dm_kcopyd_client_destroy(struct dm_kcopyd_client *kc) |
696 | { | 698 | { |
697 | /* Wait for completion of all jobs submitted by this client. */ | 699 | /* Wait for completion of all jobs submitted by this client. */ |
698 | wait_event(kc->destroyq, !atomic_read(&kc->nr_jobs)); | 700 | wait_event(kc->destroyq, !atomic_read(&kc->nr_jobs)); |
@@ -703,7 +705,4 @@ void kcopyd_client_destroy(struct kcopyd_client *kc) | |||
703 | kfree(kc); | 705 | kfree(kc); |
704 | kcopyd_exit(); | 706 | kcopyd_exit(); |
705 | } | 707 | } |
706 | 708 | EXPORT_SYMBOL(dm_kcopyd_client_destroy); | |
707 | EXPORT_SYMBOL(kcopyd_client_create); | ||
708 | EXPORT_SYMBOL(kcopyd_client_destroy); | ||
709 | EXPORT_SYMBOL(kcopyd_copy); | ||