From patchwork Mon Jun 15 17:21:05 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heinz Mauelshagen X-Patchwork-Id: 30382 X-Patchwork-Delegate: jbrassow@redhat.com Received: from hormel.redhat.com (hormel1.redhat.com [209.132.177.33]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id n5FHLjJI006931 for ; Mon, 15 Jun 2009 17:21:45 GMT Received: from listman.util.phx.redhat.com (listman.util.phx.redhat.com [10.8.4.110]) by hormel.redhat.com (Postfix) with ESMTP id D48C8618CC9; Mon, 15 Jun 2009 13:21:39 -0400 (EDT) Received: from int-mx1.corp.redhat.com (int-mx1.corp.redhat.com [172.16.52.254]) by listman.util.phx.redhat.com (8.13.1/8.13.1) with ESMTP id n5FHLZTi001690 for ; Mon, 15 Jun 2009 13:21:35 -0400 Received: from o.ww.redhat.com (vpn-10-181.str.redhat.com [10.32.10.181]) by int-mx1.corp.redhat.com (8.13.1/8.13.1) with ESMTP id n5FHLYV0008133; Mon, 15 Jun 2009 13:21:34 -0400 Received: from o.ww.redhat.com (localhost [127.0.0.1]) by o.ww.redhat.com (8.14.3/8.14.3) with ESMTP id n5FHL5lQ002121; Mon, 15 Jun 2009 19:21:05 +0200 Received: (from mauelsha@localhost) by o.ww.redhat.com (8.14.3/8.14.3/Submit) id n5FHL5qm002118; Mon, 15 Jun 2009 19:21:05 +0200 Date: Mon, 15 Jun 2009 19:21:05 +0200 From: heinzm@redhat.com To: dm-devel@redhat.com Message-ID: <4a368301.KBrCZcokAm87BF/S%heinzm@redhat.com> User-Agent: Heirloom mailx 12.4 7/29/08 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.58 on 172.16.52.254 X-loop: dm-devel@redhat.com Subject: [dm-devel] [PATCH 1/6] dm raid45 target: export region hash functions and add a needed one X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.5 Precedence: junk Reply-To: device-mapper development List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com Hi, this patch series introduces the raid45 target. Please include upstream. The raid45 target supports RAID4 mappings with a dedicated and selectable parity device and RAID5 mappings with rotating parity (left/right (a)symmetric). Initial and partial resynchronization functionality utilizes the dm dirty log module. A stripe cache handled by the target in order to update or reconstruct parity is based on memory objects being managed in a separate, sharable dm-memcache module, which allows for allocation of such objects with N chunks of page lists with M pages each. Message interface parsing is performed in the seperate, sharable dm-message module. Heinz Summary of the patch-set --- dm-devel mailing list dm-devel@redhat.com https://www.redhat.com/mailman/listinfo/dm-devel ======================== 1/5: dm raid45 target: export region hash functions and add a needed one 2/5: dm raid45 target: introduce memory cache 3/5: dm raid45 target: introduce message parser 4/5: dm raid45 target: export dm_disk from dm.c 5/5: dm raid45 target: introcuce the raid45 target 6/5: dm raid45 target: add raid45 modules to Makefile and adjust Kconfig include/linux/dm-region-hash.h | 4 ++++ drivers/md/dm-region-hash.c | 21 +++++++++++++++++-- drivers/md/dm-memcache.h | 68 ++++++++++++++++++++++ drivers/md/dm-memcache.c | 301 ++++++++++++++++++++++ drivers/md/dm-message.h | 91 ++++++++++++++++++++++++ drivers/md/dm-message.c | 183 ++++++++++++++++++++++++ drivers/md/dm.c | 1 + drivers/md/dm-raid45.h | 28 ++++++++++++++++++++++++++ drivers/md/dm-raid45.c | 4580 ++++++++++++++++++++++++++ drivers/md/Makefile | 3 +++ drivers/md/Kconfig | 9 +++++++++ 11 files changed, 5286 insertions(+), 3 deletions(-) .../{dm-region-hash.h.orig => dm-region-hash.h} | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/include/linux/dm-region-hash.h.orig b/include/linux/dm-region-hash.h index a9e652a..bfd21cb 100644 --- a/include/linux/dm-region-hash.h.orig +++ b/include/linux/dm-region-hash.h @@ -49,6 +49,7 @@ struct dm_dirty_log *dm_rh_dirty_log(struct dm_region_hash *rh); */ region_t dm_rh_bio_to_region(struct dm_region_hash *rh, struct bio *bio); sector_t dm_rh_region_to_sector(struct dm_region_hash *rh, region_t region); +region_t dm_rh_sector_to_region(struct dm_region_hash *rh, sector_t sector); void *dm_rh_region_context(struct dm_region *reg); /* @@ -72,11 +73,14 @@ void dm_rh_update_states(struct dm_region_hash *rh, int errors_handled); int dm_rh_flush(struct dm_region_hash *rh); /* Inc/dec pending count on regions. */ +void dm_rh_inc(struct dm_region_hash *rh, region_t region); void dm_rh_inc_pending(struct dm_region_hash *rh, struct bio_list *bios); void dm_rh_dec(struct dm_region_hash *rh, region_t region); /* Delay bios on regions. */ void dm_rh_delay(struct dm_region_hash *rh, struct bio *bio); +void dm_rh_delay_by_region(struct dm_region_hash *rh, struct bio *bio, + region_t region); void dm_rh_mark_nosync(struct dm_region_hash *rh, struct bio *bio, unsigned done, int error); .../md/{dm-region-hash.c.orig => dm-region-hash.c} | 21 +++++++++++++++++-- 1 files changed, 18 insertions(+), 3 deletions(-) diff --git a/drivers/md/dm-region-hash.c.orig b/drivers/md/dm-region-hash.c index 7b899be..47b088b 100644 --- a/drivers/md/dm-region-hash.c.orig +++ b/drivers/md/dm-region-hash.c @@ -107,10 +107,11 @@ struct dm_region { /* * Conversion fns */ -static region_t dm_rh_sector_to_region(struct dm_region_hash *rh, sector_t sector) +region_t dm_rh_sector_to_region(struct dm_region_hash *rh, sector_t sector) { return sector >> rh->region_shift; } +EXPORT_SYMBOL_GPL(dm_rh_sector_to_region); sector_t dm_rh_region_to_sector(struct dm_region_hash *rh, region_t region) { @@ -488,7 +489,7 @@ void dm_rh_update_states(struct dm_region_hash *rh, int errors_handled) } EXPORT_SYMBOL_GPL(dm_rh_update_states); -static void rh_inc(struct dm_region_hash *rh, region_t region) +void dm_rh_inc(struct dm_region_hash *rh, region_t region) { struct dm_region *reg; @@ -510,13 +511,14 @@ static void rh_inc(struct dm_region_hash *rh, region_t region) read_unlock(&rh->hash_lock); } +EXPORT_SYMBOL_GPL(dm_rh_inc); void dm_rh_inc_pending(struct dm_region_hash *rh, struct bio_list *bios) { struct bio *bio; for (bio = bios->head; bio; bio = bio->bi_next) - rh_inc(rh, dm_rh_bio_to_region(rh, bio)); + dm_rh_inc(rh, dm_rh_bio_to_region(rh, bio)); } EXPORT_SYMBOL_GPL(dm_rh_inc_pending); @@ -677,6 +679,19 @@ void dm_rh_delay(struct dm_region_hash *rh, struct bio *bio) } EXPORT_SYMBOL_GPL(dm_rh_delay); +void dm_rh_delay_by_region(struct dm_region_hash *rh, + struct bio *bio, region_t region) +{ + struct dm_region *reg; + + /* FIXME: locking. */ + read_lock(&rh->hash_lock); + reg = __rh_find(rh, region); + bio_list_add(®->delayed_bios, bio); + read_unlock(&rh->hash_lock); +} +EXPORT_SYMBOL_GPL(dm_rh_delay_by_region); + void dm_rh_stop_recovery(struct dm_region_hash *rh) { int i;