Next patches will be reusing raid5-cache structures and functions, so
put them in their own header.
Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@xxxxxxxxx>
---
drivers/md/raid5-cache.c | 133 +------------------------------------
drivers/md/raid5-cache.h | 166 +++++++++++++++++++++++++++++++++++++++++++++++
drivers/md/raid5.c | 1 +
drivers/md/raid5.h | 30 ---------
4 files changed, 168 insertions(+), 162 deletions(-)
create mode 100644 drivers/md/raid5-cache.h
diff --git a/drivers/md/raid5-cache.c b/drivers/md/raid5-cache.c
index 76c0e5063f1b..394d87b62efa 100644
--- a/drivers/md/raid5-cache.c
+++ b/drivers/md/raid5-cache.c
@@ -24,6 +24,7 @@
#include "md.h"
#include "raid5.h"
#include "bitmap.h"
+#include "raid5-cache.h"
/*
* metadata/data stored in disk with 4k size unit (a block) regardless
@@ -53,16 +54,6 @@
*/
#define R5L_POOL_SIZE 4
-/*
- * r5c journal modes of the array: write-back or write-through.
- * write-through mode has identical behavior as existing log only
- * implementation.
- */
-enum r5c_journal_mode {
- R5C_JOURNAL_MODE_WRITE_THROUGH = 0,
- R5C_JOURNAL_MODE_WRITE_BACK = 1,
-};
-
static char *r5c_journal_mode_str[] = {"write-through",
"write-back"};
/*
@@ -96,81 +87,6 @@ static char *r5c_journal_mode_str[] = {"write-through",
* - return IO for pending writes
*/
-struct r5l_log {
- struct md_rdev *rdev;
-
- u32 uuid_checksum;
-
- sector_t device_size; /* log device size, round to
- * BLOCK_SECTORS */
- sector_t max_free_space; /* reclaim run if free space is at
- * this size */
-
- sector_t last_checkpoint; /* log tail. where recovery scan
- * starts from */
- u64 last_cp_seq; /* log tail sequence */
-
- sector_t log_start; /* log head. where new data appends */
- u64 seq; /* log head sequence */
-
- sector_t next_checkpoint;
-
- struct mutex io_mutex;
- struct r5l_io_unit *current_io; /* current io_unit accepting new data */
-
- spinlock_t io_list_lock;
- struct list_head running_ios; /* io_units which are still running,
- * and have not yet been completely
- * written to the log */
- struct list_head io_end_ios; /* io_units which have been completely
- * written to the log but not yet written
- * to the RAID */
- struct list_head flushing_ios; /* io_units which are waiting for log
- * cache flush */
- struct list_head finished_ios; /* io_units which settle down in log disk */
- struct bio flush_bio;
-
- struct list_head no_mem_stripes; /* pending stripes, -ENOMEM */
-
- struct kmem_cache *io_kc;
- mempool_t *io_pool;
- struct bio_set *bs;
- mempool_t *meta_pool;
-
- struct md_thread *reclaim_thread;
- unsigned long reclaim_target; /* number of space that need to be
- * reclaimed. if it's 0, reclaim spaces
- * used by io_units which are in
- * IO_UNIT_STRIPE_END state (eg, reclaim
- * dones't wait for specific io_unit
- * switching to IO_UNIT_STRIPE_END
- * state) */
- wait_queue_head_t iounit_wait;
-
- struct list_head no_space_stripes; /* pending stripes, log has no space */
- spinlock_t no_space_stripes_lock;
-
- bool need_cache_flush;
-
- /* for r5c_cache */
- enum r5c_journal_mode r5c_journal_mode;
-
- /* all stripes in r5cache, in the order of seq at sh->log_start */
- struct list_head stripe_in_journal_list;
-
- spinlock_t stripe_in_journal_lock;
- atomic_t stripe_in_journal_count;
-
- /* to submit async io_units, to fulfill ordering of flush */
- struct work_struct deferred_io_work;
- /* to disable write back during in degraded mode */
- struct work_struct disable_writeback_work;
-
- /* to for chunk_aligned_read in writeback mode, details below */
- spinlock_t tree_lock;
- struct radix_tree_root big_stripe_tree;
-};
-
/*
* Enable chunk_aligned_read() with write back cache.
*
@@ -218,53 +134,6 @@ static inline sector_t r5c_tree_index(struct r5conf *conf,
return sect;
}
-/*
- * an IO range starts from a meta data block and end at the next meta data
- * block. The io unit's the meta data block tracks data/parity followed it. io
- * unit is written to log disk with normal write, as we always flush log disk
- * first and then start move data to raid disks, there is no requirement to
- * write io unit with FLUSH/FUA
- */
-struct r5l_io_unit {
- struct r5l_log *log;
-
- struct page *meta_page; /* store meta block */
- int meta_offset; /* current offset in meta_page */
-
- struct bio *current_bio;/* current_bio accepting new data */
-
- atomic_t pending_stripe;/* how many stripes not flushed to raid */
- u64 seq; /* seq number of the metablock */
- sector_t log_start; /* where the io_unit starts */
- sector_t log_end; /* where the io_unit ends */
- struct list_head log_sibling; /* log->running_ios */
- struct list_head stripe_list; /* stripes added to the io_unit */
-
- int state;
- bool need_split_bio;
- struct bio *split_bio;
-
- unsigned int has_flush:1; /* include flush request */
- unsigned int has_fua:1; /* include fua request */
- unsigned int has_null_flush:1; /* include empty flush request */
- /*
- * io isn't sent yet, flush/fua request can only be submitted till it's
- * the first IO in running_ios list
- */
- unsigned int io_deferred:1;
-
- struct bio_list flush_barriers; /* size == 0 flush bios */
-};
-
-/* r5l_io_unit state */
-enum r5l_io_unit_state {
- IO_UNIT_RUNNING = 0, /* accepting new IO */
- IO_UNIT_IO_START = 1, /* io_unit bio start writing to log,
- * don't accepting new bio */
- IO_UNIT_IO_END = 2, /* io_unit bio finish writing to log */
- IO_UNIT_STRIPE_END = 3, /* stripes data finished writing to raid */
-};
-
bool r5c_is_writeback(struct r5l_log *log)
{
return (log != NULL &&
diff --git a/drivers/md/raid5-cache.h b/drivers/md/raid5-cache.h
new file mode 100644
index 000000000000..96dc95d4a36c
--- /dev/null
+++ b/drivers/md/raid5-cache.h
@@ -0,0 +1,166 @@
+#ifndef _RAID5_CACHE_H
+#define _RAID5_CACHE_H
+
+/*
+ * r5c journal modes of the array: write-back or write-through.
+ * write-through mode has identical behavior as existing log only
+ * implementation.
+ */
+enum r5c_journal_mode {
+ R5C_JOURNAL_MODE_WRITE_THROUGH = 0,
+ R5C_JOURNAL_MODE_WRITE_BACK = 1,
+};
+
+struct r5l_log {
+ struct md_rdev *rdev;
+
+ u32 uuid_checksum;
+
+ sector_t device_size; /* log device size, round to
+ * BLOCK_SECTORS */
+ sector_t max_free_space; /* reclaim run if free space is at
+ * this size */
+
+ sector_t last_checkpoint; /* log tail. where recovery scan
+ * starts from */
+ u64 last_cp_seq; /* log tail sequence */
+
+ sector_t log_start; /* log head. where new data appends */
+ u64 seq; /* log head sequence */
+
+ sector_t next_checkpoint;
+
+ struct mutex io_mutex;
+ struct r5l_io_unit *current_io; /* current io_unit accepting new data */
+
+ spinlock_t io_list_lock;
+ struct list_head running_ios; /* io_units which are still running,
+ * and have not yet been completely
+ * written to the log */
+ struct list_head io_end_ios; /* io_units which have been completely
+ * written to the log but not yet written
+ * to the RAID */
+ struct list_head flushing_ios; /* io_units which are waiting for log
+ * cache flush */
+ struct list_head finished_ios; /* io_units which settle down in log disk */
+ struct bio flush_bio;
+
+ struct list_head no_mem_stripes; /* pending stripes, -ENOMEM */
+
+ struct kmem_cache *io_kc;
+ mempool_t *io_pool;
+ struct bio_set *bs;
+ mempool_t *meta_pool;
+
+ struct md_thread *reclaim_thread;
+ unsigned long reclaim_target; /* number of space that need to be
+ * reclaimed. if it's 0, reclaim spaces
+ * used by io_units which are in
+ * IO_UNIT_STRIPE_END state (eg, reclaim
+ * dones't wait for specific io_unit
+ * switching to IO_UNIT_STRIPE_END
+ * state) */
+ wait_queue_head_t iounit_wait;
+
+ struct list_head no_space_stripes; /* pending stripes, log has no space */
+ spinlock_t no_space_stripes_lock;
+
+ bool need_cache_flush;
+
+ /* for r5c_cache */
+ enum r5c_journal_mode r5c_journal_mode;
+
+ /* all stripes in r5cache, in the order of seq at sh->log_start */
+ struct list_head stripe_in_journal_list;
+
+ spinlock_t stripe_in_journal_lock;
+ atomic_t stripe_in_journal_count;
+
+ /* to submit async io_units, to fulfill ordering of flush */
+ struct work_struct deferred_io_work;
+ /* to disable write back during in degraded mode */
+ struct work_struct disable_writeback_work;
+
+ /* to for chunk_aligned_read in writeback mode, details below */
+ spinlock_t tree_lock;
+ struct radix_tree_root big_stripe_tree;
+};
+
+/*
+ * an IO range starts from a meta data block and end at the next meta data
+ * block. The io unit's the meta data block tracks data/parity followed it. io
+ * unit is written to log disk with normal write, as we always flush log disk
+ * first and then start move data to raid disks, there is no requirement to
+ * write io unit with FLUSH/FUA
+ */
+struct r5l_io_unit {
+ struct r5l_log *log;
+
+ struct page *meta_page; /* store meta block */
+ int meta_offset; /* current offset in meta_page */
+
+ struct bio *current_bio;/* current_bio accepting new data */
+
+ atomic_t pending_stripe;/* how many stripes not flushed to raid */
+ u64 seq; /* seq number of the metablock */
+ sector_t log_start; /* where the io_unit starts */
+ sector_t log_end; /* where the io_unit ends */
+ struct list_head log_sibling; /* log->running_ios */
+ struct list_head stripe_list; /* stripes added to the io_unit */
+
+ int state;
+ bool need_split_bio;
+ struct bio *split_bio;
+
+ unsigned int has_flush:1; /* include flush request */
+ unsigned int has_fua:1; /* include fua request */
+ unsigned int has_null_flush:1; /* include empty flush request */
+ /*
+ * io isn't sent yet, flush/fua request can only be submitted till it's
+ * the first IO in running_ios list
+ */
+ unsigned int io_deferred:1;
+
+ struct bio_list flush_barriers; /* size == 0 flush bios */
+};
+
+/* r5l_io_unit state */
+enum r5l_io_unit_state {
+ IO_UNIT_RUNNING = 0, /* accepting new IO */
+ IO_UNIT_IO_START = 1, /* io_unit bio start writing to log,
+ * don't accepting new bio */
+ IO_UNIT_IO_END = 2, /* io_unit bio finish writing to log */
+ IO_UNIT_STRIPE_END = 3, /* stripes data finished writing to raid */
+};
+
+extern int r5l_init_log(struct r5conf *conf, struct md_rdev *rdev);
+extern void r5l_exit_log(struct r5l_log *log);
+extern int r5l_write_stripe(struct r5l_log *log, struct stripe_head *sh);
+extern void r5l_write_stripe_run(struct r5l_log *log);
+extern void r5l_flush_stripe_to_raid(struct r5l_log *log);
+extern void r5l_stripe_write_finished(struct stripe_head *sh);
+extern int r5l_handle_flush_request(struct r5l_log *log, struct bio *bio);
+extern void r5l_quiesce(struct r5l_log *log, int state);
+extern bool r5l_log_disk_error(struct r5conf *conf);
+extern bool r5c_is_writeback(struct r5l_log *log);
+extern int
+r5c_try_caching_write(struct r5conf *conf, struct stripe_head *sh,
+ struct stripe_head_state *s, int disks);
+extern void
+r5c_finish_stripe_write_out(struct r5conf *conf, struct stripe_head *sh,
+ struct stripe_head_state *s);
+extern void r5c_release_extra_page(struct stripe_head *sh);
+extern void r5c_use_extra_page(struct stripe_head *sh);
+extern void r5l_wake_reclaim(struct r5l_log *log, sector_t space);
+extern void r5c_handle_cached_data_endio(struct r5conf *conf,
+ struct stripe_head *sh, int disks, struct bio_list *return_bi);
+extern int r5c_cache_data(struct r5l_log *log, struct stripe_head *sh,
+ struct stripe_head_state *s);
+extern void r5c_make_stripe_write_out(struct stripe_head *sh);
+extern void r5c_flush_cache(struct r5conf *conf, int num);
+extern void r5c_check_stripe_cache_usage(struct r5conf *conf);
+extern void r5c_check_cached_full_stripe(struct r5conf *conf);
+extern struct md_sysfs_entry r5c_journal_mode;
+extern void r5c_update_on_rdev_error(struct mddev *mddev);
+extern bool r5c_big_stripe_cached(struct r5conf *conf, sector_t sect);
+#endif /* _RAID5_CACHE_H */
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index b62f671a93ab..d1cba941951e 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -61,6 +61,7 @@
#include "raid5.h"
#include "raid0.h"
#include "bitmap.h"
+#include "raid5-cache.h"
#define UNSUPPORTED_MDDEV_FLAGS (1L << MD_FAILFAST_SUPPORTED)
diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h
index c0687df5ba06..0f64a58873de 100644
--- a/drivers/md/raid5.h
+++ b/drivers/md/raid5.h
@@ -763,34 +763,4 @@ extern struct stripe_head *
raid5_get_active_stripe(struct r5conf *conf, sector_t sector,
int previous, int noblock, int noquiesce);
extern int raid5_calc_degraded(struct r5conf *conf);
-extern int r5l_init_log(struct r5conf *conf, struct md_rdev *rdev);
-extern void r5l_exit_log(struct r5l_log *log);
-extern int r5l_write_stripe(struct r5l_log *log, struct stripe_head *head_sh);
-extern void r5l_write_stripe_run(struct r5l_log *log);
-extern void r5l_flush_stripe_to_raid(struct r5l_log *log);
-extern void r5l_stripe_write_finished(struct stripe_head *sh);
-extern int r5l_handle_flush_request(struct r5l_log *log, struct bio *bio);
-extern void r5l_quiesce(struct r5l_log *log, int state);
-extern bool r5l_log_disk_error(struct r5conf *conf);
-extern bool r5c_is_writeback(struct r5l_log *log);
-extern int
-r5c_try_caching_write(struct r5conf *conf, struct stripe_head *sh,
- struct stripe_head_state *s, int disks);
-extern void
-r5c_finish_stripe_write_out(struct r5conf *conf, struct stripe_head *sh,
- struct stripe_head_state *s);
-extern void r5c_release_extra_page(struct stripe_head *sh);
-extern void r5c_use_extra_page(struct stripe_head *sh);
-extern void r5l_wake_reclaim(struct r5l_log *log, sector_t space);
-extern void r5c_handle_cached_data_endio(struct r5conf *conf,
- struct stripe_head *sh, int disks, struct bio_list *return_bi);
-extern int r5c_cache_data(struct r5l_log *log, struct stripe_head *sh,
- struct stripe_head_state *s);
-extern void r5c_make_stripe_write_out(struct stripe_head *sh);
-extern void r5c_flush_cache(struct r5conf *conf, int num);
-extern void r5c_check_stripe_cache_usage(struct r5conf *conf);
-extern void r5c_check_cached_full_stripe(struct r5conf *conf);
-extern struct md_sysfs_entry r5c_journal_mode;
-extern void r5c_update_on_rdev_error(struct mddev *mddev);
-extern bool r5c_big_stripe_cached(struct r5conf *conf, sector_t sect);
#endif
--
2.11.0
--
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