From ae03bf639a5027d27270123f5f6e3ee6a412781d Mon Sep 17 00:00:00 2001 From: "Martin K. Petersen" Date: Fri, 22 May 2009 17:17:50 -0400 Subject: block: Use accessor functions for queue limits Convert all external users of queue limits to using wrapper functions instead of poking the request queue variables directly. Signed-off-by: Martin K. Petersen Signed-off-by: Jens Axboe --- drivers/md/multipath.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/md/multipath.c') diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c index 41ced0cbe82..4ee31aa13c4 100644 --- a/drivers/md/multipath.c +++ b/drivers/md/multipath.c @@ -303,7 +303,7 @@ static int multipath_add_disk(mddev_t *mddev, mdk_rdev_t *rdev) * merge_bvec_fn will be involved in multipath.) */ if (q->merge_bvec_fn && - mddev->queue->max_sectors > (PAGE_SIZE>>9)) + queue_max_sectors(q) > (PAGE_SIZE>>9)) blk_queue_max_sectors(mddev->queue, PAGE_SIZE>>9); conf->working_disks++; @@ -467,7 +467,7 @@ static int multipath_run (mddev_t *mddev) * violating it, not that we ever expect a device with * a merge_bvec_fn to be involved in multipath */ if (rdev->bdev->bd_disk->queue->merge_bvec_fn && - mddev->queue->max_sectors > (PAGE_SIZE>>9)) + queue_max_sectors(mddev->queue) > (PAGE_SIZE>>9)) blk_queue_max_sectors(mddev->queue, PAGE_SIZE>>9); if (!test_bit(Faulty, &rdev->flags)) -- cgit v1.2.3-70-g09d2 From 070ec55d07157a3041f92654135c3c6e2eaaf901 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Tue, 16 Jun 2009 16:54:21 +1000 Subject: md: remove mddev_to_conf "helper" macro Having a macro just to cast a void* isn't really helpful. I would must rather see that we are simply de-referencing ->private, than have to know what the macro does. So open code the macro everywhere and remove the pointless cast. Signed-off-by: NeilBrown --- drivers/md/linear.c | 12 ++++++------ drivers/md/linear.h | 2 -- drivers/md/multipath.c | 20 ++++++++++---------- drivers/md/multipath.h | 6 ------ drivers/md/raid0.c | 10 +++++----- drivers/md/raid0.h | 2 -- drivers/md/raid1.c | 38 +++++++++++++++++++------------------- drivers/md/raid1.h | 6 ------ drivers/md/raid10.c | 42 +++++++++++++++++++++--------------------- drivers/md/raid10.h | 6 ------ drivers/md/raid5.c | 36 ++++++++++++++++++------------------ drivers/md/raid5.h | 2 -- 12 files changed, 79 insertions(+), 103 deletions(-) (limited to 'drivers/md/multipath.c') diff --git a/drivers/md/linear.c b/drivers/md/linear.c index 64f1f3e046e..31f8ec7131b 100644 --- a/drivers/md/linear.c +++ b/drivers/md/linear.c @@ -28,7 +28,7 @@ static inline dev_info_t *which_dev(mddev_t *mddev, sector_t sector) { dev_info_t *hash; - linear_conf_t *conf = mddev_to_conf(mddev); + linear_conf_t *conf = mddev->private; sector_t idx = sector >> conf->sector_shift; /* @@ -79,7 +79,7 @@ static int linear_mergeable_bvec(struct request_queue *q, static void linear_unplug(struct request_queue *q) { mddev_t *mddev = q->queuedata; - linear_conf_t *conf = mddev_to_conf(mddev); + linear_conf_t *conf = mddev->private; int i; for (i=0; i < mddev->raid_disks; i++) { @@ -91,7 +91,7 @@ static void linear_unplug(struct request_queue *q) static int linear_congested(void *data, int bits) { mddev_t *mddev = data; - linear_conf_t *conf = mddev_to_conf(mddev); + linear_conf_t *conf = mddev->private; int i, ret = 0; for (i = 0; i < mddev->raid_disks && !ret ; i++) { @@ -103,7 +103,7 @@ static int linear_congested(void *data, int bits) static sector_t linear_size(mddev_t *mddev, sector_t sectors, int raid_disks) { - linear_conf_t *conf = mddev_to_conf(mddev); + linear_conf_t *conf = mddev->private; WARN_ONCE(sectors || raid_disks, "%s does not support generic reshape\n", __func__); @@ -294,7 +294,7 @@ static int linear_add(mddev_t *mddev, mdk_rdev_t *rdev) if (!newconf) return -ENOMEM; - newconf->prev = mddev_to_conf(mddev); + newconf->prev = mddev->private; mddev->private = newconf; mddev->raid_disks++; md_set_array_sectors(mddev, linear_size(mddev, 0, 0)); @@ -304,7 +304,7 @@ static int linear_add(mddev_t *mddev, mdk_rdev_t *rdev) static int linear_stop (mddev_t *mddev) { - linear_conf_t *conf = mddev_to_conf(mddev); + linear_conf_t *conf = mddev->private; blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/ do { diff --git a/drivers/md/linear.h b/drivers/md/linear.h index bf8179587f9..76078f1cded 100644 --- a/drivers/md/linear.h +++ b/drivers/md/linear.h @@ -24,6 +24,4 @@ struct linear_private_data typedef struct linear_private_data linear_conf_t; -#define mddev_to_conf(mddev) ((linear_conf_t *) mddev->private) - #endif diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c index 4ee31aa13c4..c1ca63f278a 100644 --- a/drivers/md/multipath.c +++ b/drivers/md/multipath.c @@ -58,7 +58,7 @@ static void multipath_reschedule_retry (struct multipath_bh *mp_bh) { unsigned long flags; mddev_t *mddev = mp_bh->mddev; - multipath_conf_t *conf = mddev_to_conf(mddev); + multipath_conf_t *conf = mddev->private; spin_lock_irqsave(&conf->device_lock, flags); list_add(&mp_bh->retry_list, &conf->retry_list); @@ -75,7 +75,7 @@ static void multipath_reschedule_retry (struct multipath_bh *mp_bh) static void multipath_end_bh_io (struct multipath_bh *mp_bh, int err) { struct bio *bio = mp_bh->master_bio; - multipath_conf_t *conf = mddev_to_conf(mp_bh->mddev); + multipath_conf_t *conf = mp_bh->mddev->private; bio_endio(bio, err); mempool_free(mp_bh, conf->pool); @@ -85,7 +85,7 @@ static void multipath_end_request(struct bio *bio, int error) { int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); struct multipath_bh * mp_bh = (struct multipath_bh *)(bio->bi_private); - multipath_conf_t *conf = mddev_to_conf(mp_bh->mddev); + multipath_conf_t *conf = mp_bh->mddev->private; mdk_rdev_t *rdev = conf->multipaths[mp_bh->path].rdev; if (uptodate) @@ -107,7 +107,7 @@ static void multipath_end_request(struct bio *bio, int error) static void unplug_slaves(mddev_t *mddev) { - multipath_conf_t *conf = mddev_to_conf(mddev); + multipath_conf_t *conf = mddev->private; int i; rcu_read_lock(); @@ -138,7 +138,7 @@ static void multipath_unplug(struct request_queue *q) static int multipath_make_request (struct request_queue *q, struct bio * bio) { mddev_t *mddev = q->queuedata; - multipath_conf_t *conf = mddev_to_conf(mddev); + multipath_conf_t *conf = mddev->private; struct multipath_bh * mp_bh; struct multipath_info *multipath; const int rw = bio_data_dir(bio); @@ -180,7 +180,7 @@ static int multipath_make_request (struct request_queue *q, struct bio * bio) static void multipath_status (struct seq_file *seq, mddev_t *mddev) { - multipath_conf_t *conf = mddev_to_conf(mddev); + multipath_conf_t *conf = mddev->private; int i; seq_printf (seq, " [%d/%d] [", conf->raid_disks, @@ -195,7 +195,7 @@ static void multipath_status (struct seq_file *seq, mddev_t *mddev) static int multipath_congested(void *data, int bits) { mddev_t *mddev = data; - multipath_conf_t *conf = mddev_to_conf(mddev); + multipath_conf_t *conf = mddev->private; int i, ret = 0; rcu_read_lock(); @@ -220,7 +220,7 @@ static int multipath_congested(void *data, int bits) */ static void multipath_error (mddev_t *mddev, mdk_rdev_t *rdev) { - multipath_conf_t *conf = mddev_to_conf(mddev); + multipath_conf_t *conf = mddev->private; if (conf->working_disks <= 1) { /* @@ -367,7 +367,7 @@ static void multipathd (mddev_t *mddev) struct multipath_bh *mp_bh; struct bio *bio; unsigned long flags; - multipath_conf_t *conf = mddev_to_conf(mddev); + multipath_conf_t *conf = mddev->private; struct list_head *head = &conf->retry_list; md_check_recovery(mddev); @@ -531,7 +531,7 @@ out: static int multipath_stop (mddev_t *mddev) { - multipath_conf_t *conf = mddev_to_conf(mddev); + multipath_conf_t *conf = mddev->private; md_unregister_thread(mddev->thread); mddev->thread = NULL; diff --git a/drivers/md/multipath.h b/drivers/md/multipath.h index 6fa70b400cd..d1c2a8d7839 100644 --- a/drivers/md/multipath.h +++ b/drivers/md/multipath.h @@ -18,12 +18,6 @@ struct multipath_private_data { typedef struct multipath_private_data multipath_conf_t; -/* - * this is the only point in the RAID code where we violate - * C type safety. mddev->private is an 'opaque' pointer. - */ -#define mddev_to_conf(mddev) ((multipath_conf_t *) mddev->private) - /* * this is our 'private' 'collective' MULTIPATH buffer head. * it contains information about what kind of IO operations were started diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c index e2e9c183333..77764dad1bc 100644 --- a/drivers/md/raid0.c +++ b/drivers/md/raid0.c @@ -26,7 +26,7 @@ static void raid0_unplug(struct request_queue *q) { mddev_t *mddev = q->queuedata; - raid0_conf_t *conf = mddev_to_conf(mddev); + raid0_conf_t *conf = mddev->private; mdk_rdev_t **devlist = conf->devlist; int i; @@ -40,7 +40,7 @@ static void raid0_unplug(struct request_queue *q) static int raid0_congested(void *data, int bits) { mddev_t *mddev = data; - raid0_conf_t *conf = mddev_to_conf(mddev); + raid0_conf_t *conf = mddev->private; mdk_rdev_t **devlist = conf->devlist; int i, ret = 0; @@ -294,7 +294,7 @@ static int raid0_run(mddev_t *mddev) static int raid0_stop(mddev_t *mddev) { - raid0_conf_t *conf = mddev_to_conf(mddev); + raid0_conf_t *conf = mddev->private; blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/ kfree(conf->strip_zone); @@ -327,7 +327,7 @@ static int raid0_make_request (struct request_queue *q, struct bio *bio) { mddev_t *mddev = q->queuedata; unsigned int sect_in_chunk, chunksect_bits, chunk_sects; - raid0_conf_t *conf = mddev_to_conf(mddev); + raid0_conf_t *conf = mddev->private; struct strip_zone *zone; mdk_rdev_t *tmp_dev; sector_t chunk; @@ -406,7 +406,7 @@ static void raid0_status (struct seq_file *seq, mddev_t *mddev) #ifdef MD_DEBUG int j, k, h; char b[BDEVNAME_SIZE]; - raid0_conf_t *conf = mddev_to_conf(mddev); + raid0_conf_t *conf = mddev->private; h = 0; for (j = 0; j < conf->nr_strip_zones; j++) { diff --git a/drivers/md/raid0.h b/drivers/md/raid0.h index 7b3605e570c..91f8e876ee6 100644 --- a/drivers/md/raid0.h +++ b/drivers/md/raid0.h @@ -17,6 +17,4 @@ struct raid0_private_data typedef struct raid0_private_data raid0_conf_t; -#define mddev_to_conf(mddev) ((raid0_conf_t *) mddev->private) - #endif diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index e23758b4a34..5ea5bca53a5 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -182,7 +182,7 @@ static void put_all_bios(conf_t *conf, r1bio_t *r1_bio) static void free_r1bio(r1bio_t *r1_bio) { - conf_t *conf = mddev_to_conf(r1_bio->mddev); + conf_t *conf = r1_bio->mddev->private; /* * Wake up any possible resync thread that waits for the device @@ -196,7 +196,7 @@ static void free_r1bio(r1bio_t *r1_bio) static void put_buf(r1bio_t *r1_bio) { - conf_t *conf = mddev_to_conf(r1_bio->mddev); + conf_t *conf = r1_bio->mddev->private; int i; for (i=0; iraid_disks; i++) { @@ -214,7 +214,7 @@ static void reschedule_retry(r1bio_t *r1_bio) { unsigned long flags; mddev_t *mddev = r1_bio->mddev; - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; spin_lock_irqsave(&conf->device_lock, flags); list_add(&r1_bio->retry_list, &conf->retry_list); @@ -253,7 +253,7 @@ static void raid_end_bio_io(r1bio_t *r1_bio) */ static inline void update_head_pos(int disk, r1bio_t *r1_bio) { - conf_t *conf = mddev_to_conf(r1_bio->mddev); + conf_t *conf = r1_bio->mddev->private; conf->mirrors[disk].head_position = r1_bio->sector + (r1_bio->sectors); @@ -264,7 +264,7 @@ static void raid1_end_read_request(struct bio *bio, int error) int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); r1bio_t * r1_bio = (r1bio_t *)(bio->bi_private); int mirror; - conf_t *conf = mddev_to_conf(r1_bio->mddev); + conf_t *conf = r1_bio->mddev->private; mirror = r1_bio->read_disk; /* @@ -309,7 +309,7 @@ static void raid1_end_write_request(struct bio *bio, int error) int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); r1bio_t * r1_bio = (r1bio_t *)(bio->bi_private); int mirror, behind = test_bit(R1BIO_BehindIO, &r1_bio->state); - conf_t *conf = mddev_to_conf(r1_bio->mddev); + conf_t *conf = r1_bio->mddev->private; struct bio *to_put = NULL; @@ -541,7 +541,7 @@ static int read_balance(conf_t *conf, r1bio_t *r1_bio) static void unplug_slaves(mddev_t *mddev) { - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; int i; rcu_read_lock(); @@ -573,7 +573,7 @@ static void raid1_unplug(struct request_queue *q) static int raid1_congested(void *data, int bits) { mddev_t *mddev = data; - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; int i, ret = 0; rcu_read_lock(); @@ -772,7 +772,7 @@ do_sync_io: static int make_request(struct request_queue *q, struct bio * bio) { mddev_t *mddev = q->queuedata; - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; mirror_info_t *mirror; r1bio_t *r1_bio; struct bio *read_bio; @@ -991,7 +991,7 @@ static int make_request(struct request_queue *q, struct bio * bio) static void status(struct seq_file *seq, mddev_t *mddev) { - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; int i; seq_printf(seq, " [%d/%d] [", conf->raid_disks, @@ -1010,7 +1010,7 @@ static void status(struct seq_file *seq, mddev_t *mddev) static void error(mddev_t *mddev, mdk_rdev_t *rdev) { char b[BDEVNAME_SIZE]; - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; /* * If it is not operational, then we have already marked it as dead @@ -1214,7 +1214,7 @@ static void end_sync_write(struct bio *bio, int error) int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); r1bio_t * r1_bio = (r1bio_t *)(bio->bi_private); mddev_t *mddev = r1_bio->mddev; - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; int i; int mirror=0; @@ -1248,7 +1248,7 @@ static void end_sync_write(struct bio *bio, int error) static void sync_request_write(mddev_t *mddev, r1bio_t *r1_bio) { - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; int i; int disks = conf->raid_disks; struct bio *bio, *wbio; @@ -1562,7 +1562,7 @@ static void raid1d(mddev_t *mddev) r1bio_t *r1_bio; struct bio *bio; unsigned long flags; - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; struct list_head *head = &conf->retry_list; int unplug=0; mdk_rdev_t *rdev; @@ -1585,7 +1585,7 @@ static void raid1d(mddev_t *mddev) spin_unlock_irqrestore(&conf->device_lock, flags); mddev = r1_bio->mddev; - conf = mddev_to_conf(mddev); + conf = mddev->private; if (test_bit(R1BIO_IsSync, &r1_bio->state)) { sync_request_write(mddev, r1_bio); unplug = 1; @@ -1706,7 +1706,7 @@ static int init_resync(conf_t *conf) static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, int go_faster) { - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; r1bio_t *r1_bio; struct bio *bio; sector_t max_sector, nr_sectors; @@ -2087,7 +2087,7 @@ out: static int stop(mddev_t *mddev) { - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; struct bitmap *bitmap = mddev->bitmap; int behind_wait = 0; @@ -2155,7 +2155,7 @@ static int raid1_reshape(mddev_t *mddev) mempool_t *newpool, *oldpool; struct pool_info *newpoolinfo; mirror_info_t *newmirrors; - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; int cnt, raid_disks; unsigned long flags; int d, d2, err; @@ -2252,7 +2252,7 @@ static int raid1_reshape(mddev_t *mddev) static void raid1_quiesce(mddev_t *mddev, int state) { - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; switch(state) { case 1: diff --git a/drivers/md/raid1.h b/drivers/md/raid1.h index 1620eea3d57..e87b84deff6 100644 --- a/drivers/md/raid1.h +++ b/drivers/md/raid1.h @@ -63,12 +63,6 @@ struct r1_private_data_s { typedef struct r1_private_data_s conf_t; -/* - * this is the only point in the RAID code where we violate - * C type safety. mddev->private is an 'opaque' pointer. - */ -#define mddev_to_conf(mddev) ((conf_t *) mddev->private) - /* * this is our 'private' RAID1 bio. * diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 750550c1166..9a5beb4fd95 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -188,7 +188,7 @@ static void put_all_bios(conf_t *conf, r10bio_t *r10_bio) static void free_r10bio(r10bio_t *r10_bio) { - conf_t *conf = mddev_to_conf(r10_bio->mddev); + conf_t *conf = r10_bio->mddev->private; /* * Wake up any possible resync thread that waits for the device @@ -202,7 +202,7 @@ static void free_r10bio(r10bio_t *r10_bio) static void put_buf(r10bio_t *r10_bio) { - conf_t *conf = mddev_to_conf(r10_bio->mddev); + conf_t *conf = r10_bio->mddev->private; mempool_free(r10_bio, conf->r10buf_pool); @@ -213,7 +213,7 @@ static void reschedule_retry(r10bio_t *r10_bio) { unsigned long flags; mddev_t *mddev = r10_bio->mddev; - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; spin_lock_irqsave(&conf->device_lock, flags); list_add(&r10_bio->retry_list, &conf->retry_list); @@ -245,7 +245,7 @@ static void raid_end_bio_io(r10bio_t *r10_bio) */ static inline void update_head_pos(int slot, r10bio_t *r10_bio) { - conf_t *conf = mddev_to_conf(r10_bio->mddev); + conf_t *conf = r10_bio->mddev->private; conf->mirrors[r10_bio->devs[slot].devnum].head_position = r10_bio->devs[slot].addr + (r10_bio->sectors); @@ -256,7 +256,7 @@ static void raid10_end_read_request(struct bio *bio, int error) int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); r10bio_t * r10_bio = (r10bio_t *)(bio->bi_private); int slot, dev; - conf_t *conf = mddev_to_conf(r10_bio->mddev); + conf_t *conf = r10_bio->mddev->private; slot = r10_bio->read_slot; @@ -297,7 +297,7 @@ static void raid10_end_write_request(struct bio *bio, int error) int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); r10bio_t * r10_bio = (r10bio_t *)(bio->bi_private); int slot, dev; - conf_t *conf = mddev_to_conf(r10_bio->mddev); + conf_t *conf = r10_bio->mddev->private; for (slot = 0; slot < conf->copies; slot++) if (r10_bio->devs[slot].bio == bio) @@ -596,7 +596,7 @@ rb_out: static void unplug_slaves(mddev_t *mddev) { - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; int i; rcu_read_lock(); @@ -628,7 +628,7 @@ static void raid10_unplug(struct request_queue *q) static int raid10_congested(void *data, int bits) { mddev_t *mddev = data; - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; int i, ret = 0; rcu_read_lock(); @@ -788,7 +788,7 @@ static void unfreeze_array(conf_t *conf) static int make_request(struct request_queue *q, struct bio * bio) { mddev_t *mddev = q->queuedata; - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; mirror_info_t *mirror; r10bio_t *r10_bio; struct bio *read_bio; @@ -981,7 +981,7 @@ static int make_request(struct request_queue *q, struct bio * bio) static void status(struct seq_file *seq, mddev_t *mddev) { - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; int i; if (conf->near_copies < conf->raid_disks) @@ -1006,7 +1006,7 @@ static void status(struct seq_file *seq, mddev_t *mddev) static void error(mddev_t *mddev, mdk_rdev_t *rdev) { char b[BDEVNAME_SIZE]; - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; /* * If it is not operational, then we have already marked it as dead @@ -1215,7 +1215,7 @@ abort: static void end_sync_read(struct bio *bio, int error) { r10bio_t * r10_bio = (r10bio_t *)(bio->bi_private); - conf_t *conf = mddev_to_conf(r10_bio->mddev); + conf_t *conf = r10_bio->mddev->private; int i,d; for (i=0; icopies; i++) @@ -1253,7 +1253,7 @@ static void end_sync_write(struct bio *bio, int error) int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); r10bio_t * r10_bio = (r10bio_t *)(bio->bi_private); mddev_t *mddev = r10_bio->mddev; - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; int i,d; for (i = 0; i < conf->copies; i++) @@ -1300,7 +1300,7 @@ static void end_sync_write(struct bio *bio, int error) */ static void sync_request_write(mddev_t *mddev, r10bio_t *r10_bio) { - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; int i, first; struct bio *tbio, *fbio; @@ -1400,7 +1400,7 @@ done: static void recovery_request_write(mddev_t *mddev, r10bio_t *r10_bio) { - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; int i, d; struct bio *bio, *wbio; @@ -1549,7 +1549,7 @@ static void raid10d(mddev_t *mddev) r10bio_t *r10_bio; struct bio *bio; unsigned long flags; - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; struct list_head *head = &conf->retry_list; int unplug=0; mdk_rdev_t *rdev; @@ -1572,7 +1572,7 @@ static void raid10d(mddev_t *mddev) spin_unlock_irqrestore(&conf->device_lock, flags); mddev = r10_bio->mddev; - conf = mddev_to_conf(mddev); + conf = mddev->private; if (test_bit(R10BIO_IsSync, &r10_bio->state)) { sync_request_write(mddev, r10_bio); unplug = 1; @@ -1680,7 +1680,7 @@ static int init_resync(conf_t *conf) static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, int go_faster) { - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; r10bio_t *r10_bio; struct bio *biolist = NULL, *bio; sector_t max_sector, nr_sectors; @@ -2026,7 +2026,7 @@ static sector_t raid10_size(mddev_t *mddev, sector_t sectors, int raid_disks) { sector_t size; - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; if (!raid_disks) raid_disks = mddev->raid_disks; @@ -2227,7 +2227,7 @@ out: static int stop(mddev_t *mddev) { - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; raise_barrier(conf, 0); lower_barrier(conf); @@ -2245,7 +2245,7 @@ static int stop(mddev_t *mddev) static void raid10_quiesce(mddev_t *mddev, int state) { - conf_t *conf = mddev_to_conf(mddev); + conf_t *conf = mddev->private; switch(state) { case 1: diff --git a/drivers/md/raid10.h b/drivers/md/raid10.h index 244dbe507a5..59cd1efb8d3 100644 --- a/drivers/md/raid10.h +++ b/drivers/md/raid10.h @@ -61,12 +61,6 @@ struct r10_private_data_s { typedef struct r10_private_data_s conf_t; -/* - * this is the only point in the RAID code where we violate - * C type safety. mddev->private is an 'opaque' pointer. - */ -#define mddev_to_conf(mddev) ((conf_t *) mddev->private) - /* * this is our 'private' RAID10 bio. * diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index bef87669823..7fb97c65ad3 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -3284,7 +3284,7 @@ static void activate_bit_delay(raid5_conf_t *conf) static void unplug_slaves(mddev_t *mddev) { - raid5_conf_t *conf = mddev_to_conf(mddev); + raid5_conf_t *conf = mddev->private; int i; rcu_read_lock(); @@ -3308,7 +3308,7 @@ static void unplug_slaves(mddev_t *mddev) static void raid5_unplug_device(struct request_queue *q) { mddev_t *mddev = q->queuedata; - raid5_conf_t *conf = mddev_to_conf(mddev); + raid5_conf_t *conf = mddev->private; unsigned long flags; spin_lock_irqsave(&conf->device_lock, flags); @@ -3327,7 +3327,7 @@ static void raid5_unplug_device(struct request_queue *q) static int raid5_congested(void *data, int bits) { mddev_t *mddev = data; - raid5_conf_t *conf = mddev_to_conf(mddev); + raid5_conf_t *conf = mddev->private; /* No difference between reads and writes. Just check * how busy the stripe_cache is @@ -3440,7 +3440,7 @@ static void raid5_align_endio(struct bio *bi, int error) bio_put(bi); mddev = raid_bi->bi_bdev->bd_disk->queue->queuedata; - conf = mddev_to_conf(mddev); + conf = mddev->private; rdev = (void*)raid_bi->bi_next; raid_bi->bi_next = NULL; @@ -3482,7 +3482,7 @@ static int bio_fits_rdev(struct bio *bi) static int chunk_aligned_read(struct request_queue *q, struct bio * raid_bio) { mddev_t *mddev = q->queuedata; - raid5_conf_t *conf = mddev_to_conf(mddev); + raid5_conf_t *conf = mddev->private; unsigned int dd_idx; struct bio* align_bi; mdk_rdev_t *rdev; @@ -3599,7 +3599,7 @@ static struct stripe_head *__get_priority_stripe(raid5_conf_t *conf) static int make_request(struct request_queue *q, struct bio * bi) { mddev_t *mddev = q->queuedata; - raid5_conf_t *conf = mddev_to_conf(mddev); + raid5_conf_t *conf = mddev->private; int dd_idx; sector_t new_sector; sector_t logical_sector, last_sector; @@ -4129,7 +4129,7 @@ static int retry_aligned_read(raid5_conf_t *conf, struct bio *raid_bio) static void raid5d(mddev_t *mddev) { struct stripe_head *sh; - raid5_conf_t *conf = mddev_to_conf(mddev); + raid5_conf_t *conf = mddev->private; int handled; pr_debug("+++ raid5d active\n"); @@ -4185,7 +4185,7 @@ static void raid5d(mddev_t *mddev) static ssize_t raid5_show_stripe_cache_size(mddev_t *mddev, char *page) { - raid5_conf_t *conf = mddev_to_conf(mddev); + raid5_conf_t *conf = mddev->private; if (conf) return sprintf(page, "%d\n", conf->max_nr_stripes); else @@ -4195,7 +4195,7 @@ raid5_show_stripe_cache_size(mddev_t *mddev, char *page) static ssize_t raid5_store_stripe_cache_size(mddev_t *mddev, const char *page, size_t len) { - raid5_conf_t *conf = mddev_to_conf(mddev); + raid5_conf_t *conf = mddev->private; unsigned long new; int err; @@ -4233,7 +4233,7 @@ raid5_stripecache_size = __ATTR(stripe_cache_size, S_IRUGO | S_IWUSR, static ssize_t raid5_show_preread_threshold(mddev_t *mddev, char *page) { - raid5_conf_t *conf = mddev_to_conf(mddev); + raid5_conf_t *conf = mddev->private; if (conf) return sprintf(page, "%d\n", conf->bypass_threshold); else @@ -4243,7 +4243,7 @@ raid5_show_preread_threshold(mddev_t *mddev, char *page) static ssize_t raid5_store_preread_threshold(mddev_t *mddev, const char *page, size_t len) { - raid5_conf_t *conf = mddev_to_conf(mddev); + raid5_conf_t *conf = mddev->private; unsigned long new; if (len >= PAGE_SIZE) return -EINVAL; @@ -4267,7 +4267,7 @@ raid5_preread_bypass_threshold = __ATTR(preread_bypass_threshold, static ssize_t stripe_cache_active_show(mddev_t *mddev, char *page) { - raid5_conf_t *conf = mddev_to_conf(mddev); + raid5_conf_t *conf = mddev->private; if (conf) return sprintf(page, "%d\n", atomic_read(&conf->active_stripes)); else @@ -4291,7 +4291,7 @@ static struct attribute_group raid5_attrs_group = { static sector_t raid5_size(mddev_t *mddev, sector_t sectors, int raid_disks) { - raid5_conf_t *conf = mddev_to_conf(mddev); + raid5_conf_t *conf = mddev->private; if (!sectors) sectors = mddev->dev_sectors; @@ -4845,7 +4845,7 @@ static int raid5_resize(mddev_t *mddev, sector_t sectors) static int raid5_check_reshape(mddev_t *mddev) { - raid5_conf_t *conf = mddev_to_conf(mddev); + raid5_conf_t *conf = mddev->private; if (mddev->delta_disks == 0 && mddev->new_layout == mddev->layout && @@ -4890,7 +4890,7 @@ static int raid5_check_reshape(mddev_t *mddev) static int raid5_start_reshape(mddev_t *mddev) { - raid5_conf_t *conf = mddev_to_conf(mddev); + raid5_conf_t *conf = mddev->private; mdk_rdev_t *rdev; int spares = 0; int added_devices = 0; @@ -5022,7 +5022,7 @@ static void end_reshape(raid5_conf_t *conf) static void raid5_finish_reshape(mddev_t *mddev) { struct block_device *bdev; - raid5_conf_t *conf = mddev_to_conf(mddev); + raid5_conf_t *conf = mddev->private; if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { @@ -5061,7 +5061,7 @@ static void raid5_finish_reshape(mddev_t *mddev) static void raid5_quiesce(mddev_t *mddev, int state) { - raid5_conf_t *conf = mddev_to_conf(mddev); + raid5_conf_t *conf = mddev->private; switch(state) { case 2: /* resume for a suspend */ @@ -5157,7 +5157,7 @@ static int raid5_reconfig(mddev_t *mddev, int new_layout, int new_chunk) * For larger arrays we record the new value - after validation * to be used by a reshape pass. */ - raid5_conf_t *conf = mddev_to_conf(mddev); + raid5_conf_t *conf = mddev->private; if (new_layout >= 0 && !algorithm_valid_raid5(new_layout)) return -EINVAL; diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h index 52ba99954de..1a25c9e252b 100644 --- a/drivers/md/raid5.h +++ b/drivers/md/raid5.h @@ -408,8 +408,6 @@ struct raid5_private_data { typedef struct raid5_private_data raid5_conf_t; -#define mddev_to_conf(mddev) ((raid5_conf_t *) mddev->private) - /* * Our supported algorithms */ -- cgit v1.2.3-70-g09d2 From 0894cc3066aaa3e75a99383c0d25feebf9b688ac Mon Sep 17 00:00:00 2001 From: Andre Noll Date: Thu, 18 Jun 2009 08:49:23 +1000 Subject: md: Move check for bitmap presence to personality code. If the superblock of a component device indicates the presence of a bitmap but the corresponding raid personality does not support bitmaps (raid0, linear, multipath, faulty), then something is seriously wrong and we'd better refuse to run such an array. Currently, this check is performed while the superblocks are examined, i.e. before entering personality code. Therefore the generic md layer must know which raid levels support bitmaps and which do not. This patch avoids this layer violation without adding identical code to various personalities. This is accomplished by introducing a new public function to md.c, md_check_no_bitmap(), which replaces the hard-coded checks in the superblock loading functions. A call to md_check_no_bitmap() is added to the ->run method of each personality which does not support bitmaps and assembly is aborted if at least one component device contains a bitmap. Signed-off-by: Andre Noll Signed-off-by: NeilBrown --- drivers/md/faulty.c | 6 +++++- drivers/md/linear.c | 2 ++ drivers/md/md.c | 40 ++++++++++++++++++---------------------- drivers/md/md.h | 1 + drivers/md/multipath.c | 3 +++ drivers/md/raid0.c | 2 ++ 6 files changed, 31 insertions(+), 23 deletions(-) (limited to 'drivers/md/multipath.c') diff --git a/drivers/md/faulty.c b/drivers/md/faulty.c index 6e83b38d931..87d88dbb667 100644 --- a/drivers/md/faulty.c +++ b/drivers/md/faulty.c @@ -299,8 +299,12 @@ static int run(mddev_t *mddev) { mdk_rdev_t *rdev; int i; + conf_t *conf; - conf_t *conf = kmalloc(sizeof(*conf), GFP_KERNEL); + if (md_check_no_bitmap(mddev)) + return -EINVAL; + + conf = kmalloc(sizeof(*conf), GFP_KERNEL); if (!conf) return -ENOMEM; diff --git a/drivers/md/linear.c b/drivers/md/linear.c index dda2f1b64a6..564c390f8a1 100644 --- a/drivers/md/linear.c +++ b/drivers/md/linear.c @@ -189,6 +189,8 @@ static int linear_run (mddev_t *mddev) { linear_conf_t *conf; + if (md_check_no_bitmap(mddev)) + return -EINVAL; mddev->queue->queue_lock = &mddev->queue->__queue_lock; conf = linear_conf(mddev, mddev->raid_disks); diff --git a/drivers/md/md.c b/drivers/md/md.c index 0f11fd1417a..09be637d52c 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -735,6 +735,24 @@ struct super_type { sector_t num_sectors); }; +/* + * Check that the given mddev has no bitmap. + * + * This function is called from the run method of all personalities that do not + * support bitmaps. It prints an error message and returns non-zero if mddev + * has a bitmap. Otherwise, it returns 0. + * + */ +int md_check_no_bitmap(mddev_t *mddev) +{ + if (!mddev->bitmap_file && !mddev->bitmap_offset) + return 0; + printk(KERN_ERR "%s: bitmaps are not supported for %s\n", + mdname(mddev), mddev->pers->name); + return 1; +} +EXPORT_SYMBOL(md_check_no_bitmap); + /* * load_super for 0.90.0 */ @@ -788,17 +806,6 @@ static int super_90_load(mdk_rdev_t *rdev, mdk_rdev_t *refdev, int minor_version rdev->data_offset = 0; rdev->sb_size = MD_SB_BYTES; - if (sb->state & (1<level != 1 && sb->level != 4 - && sb->level != 5 && sb->level != 6 - && sb->level != 10) { - /* FIXME use a better test */ - printk(KERN_WARNING - "md: bitmaps not supported for this level.\n"); - goto abort; - } - } - if (sb->level == LEVEL_MULTIPATH) rdev->desc_nr = -1; else @@ -1176,17 +1183,6 @@ static int super_1_load(mdk_rdev_t *rdev, mdk_rdev_t *refdev, int minor_version) bdevname(rdev->bdev,b)); return -EINVAL; } - if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET)) { - if (sb->level != cpu_to_le32(1) && - sb->level != cpu_to_le32(4) && - sb->level != cpu_to_le32(5) && - sb->level != cpu_to_le32(6) && - sb->level != cpu_to_le32(10)) { - printk(KERN_WARNING - "md: bitmaps not supported for this level.\n"); - return -EINVAL; - } - } rdev->preferred_minor = 0xffff; rdev->data_offset = le64_to_cpu(sb->data_offset); diff --git a/drivers/md/md.h b/drivers/md/md.h index ea2c441449d..9430a110db9 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -430,5 +430,6 @@ extern void md_new_event(mddev_t *mddev); extern int md_allow_write(mddev_t *mddev); extern void md_wait_for_blocked_rdev(mdk_rdev_t *rdev, mddev_t *mddev); extern void md_set_array_sectors(mddev_t *mddev, sector_t array_sectors); +extern int md_check_no_bitmap(mddev_t *mddev); #endif /* _MD_MD_H */ diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c index c1ca63f278a..cbe368fa659 100644 --- a/drivers/md/multipath.c +++ b/drivers/md/multipath.c @@ -421,6 +421,9 @@ static int multipath_run (mddev_t *mddev) struct multipath_info *disk; mdk_rdev_t *rdev; + if (md_check_no_bitmap(mddev)) + return -EINVAL; + if (mddev->level != LEVEL_MULTIPATH) { printk("multipath: %s: raid level not set to multipath IO (%d)\n", mdname(mddev), mddev->level); diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c index 717e64a4af9..ab4a489d869 100644 --- a/drivers/md/raid0.c +++ b/drivers/md/raid0.c @@ -314,6 +314,8 @@ static int raid0_run(mddev_t *mddev) printk(KERN_ERR "md/raid0: chunk size must be set.\n"); return -EINVAL; } + if (md_check_no_bitmap(mddev)) + return -EINVAL; blk_queue_max_sectors(mddev->queue, mddev->chunk_sectors); mddev->queue->queue_lock = &mddev->queue->__queue_lock; -- cgit v1.2.3-70-g09d2