From cc94015a9eac5d511fe9b716624d8fdf9c6e64b2 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Tue, 26 Jul 2011 11:35:35 +1000 Subject: md/raid5: move stripe_head_state and more code into handle_stripe. By defining the 'stripe_head_state' in 'handle_stripe', we can move some common code out of handle_stripe[56]() and into handle_stripe. The means that all accesses for stripe_head_state in handle_stripe[56] need to be 's->' instead of 's.', but the compiler should inline those functions and just use a direct stack reference, and future patches while hoist most of this code up into handle_stripe() so we will revert to "s.". Signed-off-by: NeilBrown Reviewed-by: Namhyung Kim --- drivers/md/raid5.c | 340 +++++++++++++++++++++++++---------------------------- 1 file changed, 158 insertions(+), 182 deletions(-) (limited to 'drivers/md/raid5.c') diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index bc15f48be78d..36873cfc3291 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -2999,24 +2999,13 @@ static void handle_stripe_expansion(raid5_conf_t *conf, struct stripe_head *sh, * */ -static void handle_stripe5(struct stripe_head *sh) +static void handle_stripe5(struct stripe_head *sh, struct stripe_head_state *s) { raid5_conf_t *conf = sh->raid_conf; int disks = sh->disks, i; - struct stripe_head_state s; struct r5dev *dev; int prexor; - memset(&s, 0, sizeof(s)); - pr_debug("handling stripe %llu, state=%#lx cnt=%d, pd_idx=%d check:%d " - "reconstruct:%d\n", (unsigned long long)sh->sector, sh->state, - atomic_read(&sh->count), sh->pd_idx, sh->check_state, - sh->reconstruct_state); - - s.syncing = test_bit(STRIPE_SYNCING, &sh->state); - s.expanding = test_bit(STRIPE_EXPAND_SOURCE, &sh->state); - s.expanded = test_bit(STRIPE_EXPAND_READY, &sh->state); - /* Now to look around and see what can be done */ rcu_read_lock(); spin_lock_irq(&conf->device_lock); @@ -3039,25 +3028,28 @@ static void handle_stripe5(struct stripe_head *sh) set_bit(R5_Wantfill, &dev->flags); /* now count some things */ - if (test_bit(R5_LOCKED, &dev->flags)) s.locked++; - if (test_bit(R5_UPTODATE, &dev->flags)) s.uptodate++; - if (test_bit(R5_Wantcompute, &dev->flags)) s.compute++; + if (test_bit(R5_LOCKED, &dev->flags)) + s->locked++; + if (test_bit(R5_UPTODATE, &dev->flags)) + s->uptodate++; + if (test_bit(R5_Wantcompute, &dev->flags)) + s->compute++; if (test_bit(R5_Wantfill, &dev->flags)) - s.to_fill++; + s->to_fill++; else if (dev->toread) - s.to_read++; + s->to_read++; if (dev->towrite) { - s.to_write++; + s->to_write++; if (!test_bit(R5_OVERWRITE, &dev->flags)) - s.non_overwrite++; + s->non_overwrite++; } if (dev->written) - s.written++; + s->written++; rdev = rcu_dereference(conf->disks[i].rdev); - if (s.blocked_rdev == NULL && + if (s->blocked_rdev == NULL && rdev && unlikely(test_bit(Blocked, &rdev->flags))) { - s.blocked_rdev = rdev; + s->blocked_rdev = rdev; atomic_inc(&rdev->nr_pending); } clear_bit(R5_Insync, &dev->flags); @@ -3078,62 +3070,62 @@ static void handle_stripe5(struct stripe_head *sh) if (test_bit(R5_ReadError, &dev->flags)) clear_bit(R5_Insync, &dev->flags); if (!test_bit(R5_Insync, &dev->flags)) { - s.failed++; - s.failed_num[0] = i; + s->failed++; + s->failed_num[0] = i; } } spin_unlock_irq(&conf->device_lock); rcu_read_unlock(); - if (unlikely(s.blocked_rdev)) { - if (s.syncing || s.expanding || s.expanded || - s.to_write || s.written) { + if (unlikely(s->blocked_rdev)) { + if (s->syncing || s->expanding || s->expanded || + s->to_write || s->written) { set_bit(STRIPE_HANDLE, &sh->state); - goto unlock; + return; } /* There is nothing for the blocked_rdev to block */ - rdev_dec_pending(s.blocked_rdev, conf->mddev); - s.blocked_rdev = NULL; + rdev_dec_pending(s->blocked_rdev, conf->mddev); + s->blocked_rdev = NULL; } - if (s.to_fill && !test_bit(STRIPE_BIOFILL_RUN, &sh->state)) { - set_bit(STRIPE_OP_BIOFILL, &s.ops_request); + if (s->to_fill && !test_bit(STRIPE_BIOFILL_RUN, &sh->state)) { + set_bit(STRIPE_OP_BIOFILL, &s->ops_request); set_bit(STRIPE_BIOFILL_RUN, &sh->state); } pr_debug("locked=%d uptodate=%d to_read=%d" " to_write=%d failed=%d failed_num=%d\n", - s.locked, s.uptodate, s.to_read, s.to_write, - s.failed, s.failed_num[0]); + s->locked, s->uptodate, s->to_read, s->to_write, + s->failed, s->failed_num[0]); /* check if the array has lost two devices and, if so, some requests might * need to be failed */ - if (s.failed > 1 && s.to_read+s.to_write+s.written) - handle_failed_stripe(conf, sh, &s, disks, &s.return_bi); - if (s.failed > 1 && s.syncing) { + if (s->failed > 1 && s->to_read+s->to_write+s->written) + handle_failed_stripe(conf, sh, s, disks, &s->return_bi); + if (s->failed > 1 && s->syncing) { md_done_sync(conf->mddev, STRIPE_SECTORS,0); clear_bit(STRIPE_SYNCING, &sh->state); - s.syncing = 0; + s->syncing = 0; } /* might be able to return some write requests if the parity block * is safe, or on a failed drive */ dev = &sh->dev[sh->pd_idx]; - if ( s.written && - ((test_bit(R5_Insync, &dev->flags) && - !test_bit(R5_LOCKED, &dev->flags) && - test_bit(R5_UPTODATE, &dev->flags)) || - (s.failed == 1 && s.failed_num[0] == sh->pd_idx))) - handle_stripe_clean_event(conf, sh, disks, &s.return_bi); + if (s->written && + ((test_bit(R5_Insync, &dev->flags) && + !test_bit(R5_LOCKED, &dev->flags) && + test_bit(R5_UPTODATE, &dev->flags)) || + (s->failed == 1 && s->failed_num[0] == sh->pd_idx))) + handle_stripe_clean_event(conf, sh, disks, &s->return_bi); /* Now we might consider reading some blocks, either to check/generate * parity, or to satisfy requests * or to load a block that is being partially written. */ - if (s.to_read || s.non_overwrite || - (s.syncing && (s.uptodate + s.compute < disks)) || s.expanding) - handle_stripe_fill5(sh, &s, disks); + if (s->to_read || s->non_overwrite || + (s->syncing && (s->uptodate + s->compute < disks)) || s->expanding) + handle_stripe_fill5(sh, s, disks); /* Now we check to see if any write operations have recently * completed @@ -3158,12 +3150,12 @@ static void handle_stripe5(struct stripe_head *sh) if (prexor) continue; if (!test_bit(R5_Insync, &dev->flags) || - (i == sh->pd_idx && s.failed == 0)) + (i == sh->pd_idx && s->failed == 0)) set_bit(STRIPE_INSYNC, &sh->state); } } if (test_and_clear_bit(STRIPE_PREREAD_ACTIVE, &sh->state)) - s.dec_preread_active = 1; + s->dec_preread_active = 1; } /* Now to consider new write requests and what else, if anything @@ -3172,8 +3164,8 @@ static void handle_stripe5(struct stripe_head *sh) * 2/ A 'check' operation is in flight, as it may clobber the parity * block. */ - if (s.to_write && !sh->reconstruct_state && !sh->check_state) - handle_stripe_dirtying5(conf, sh, &s, disks); + if (s->to_write && !sh->reconstruct_state && !sh->check_state) + handle_stripe_dirtying5(conf, sh, s, disks); /* maybe we need to check and possibly fix the parity for this stripe * Any reads will already have been scheduled, so we just see if enough @@ -3181,12 +3173,13 @@ static void handle_stripe5(struct stripe_head *sh) * dependent operations are in flight. */ if (sh->check_state || - (s.syncing && s.locked == 0 && + (s->syncing && s->locked == 0 && !test_bit(STRIPE_COMPUTE_RUN, &sh->state) && !test_bit(STRIPE_INSYNC, &sh->state))) - handle_parity_checks5(conf, sh, &s, disks); + handle_parity_checks5(conf, sh, s, disks); - if (s.syncing && s.locked == 0 && test_bit(STRIPE_INSYNC, &sh->state)) { + if (s->syncing && s->locked == 0 + && test_bit(STRIPE_INSYNC, &sh->state)) { md_done_sync(conf->mddev, STRIPE_SECTORS,1); clear_bit(STRIPE_SYNCING, &sh->state); } @@ -3194,22 +3187,22 @@ static void handle_stripe5(struct stripe_head *sh) /* If the failed drive is just a ReadError, then we might need to progress * the repair/check process */ - if (s.failed == 1 && !conf->mddev->ro && - test_bit(R5_ReadError, &sh->dev[s.failed_num[0]].flags) - && !test_bit(R5_LOCKED, &sh->dev[s.failed_num[0]].flags) - && test_bit(R5_UPTODATE, &sh->dev[s.failed_num[0]].flags) + if (s->failed == 1 && !conf->mddev->ro && + test_bit(R5_ReadError, &sh->dev[s->failed_num[0]].flags) + && !test_bit(R5_LOCKED, &sh->dev[s->failed_num[0]].flags) + && test_bit(R5_UPTODATE, &sh->dev[s->failed_num[0]].flags) ) { - dev = &sh->dev[s.failed_num[0]]; + dev = &sh->dev[s->failed_num[0]]; if (!test_bit(R5_ReWrite, &dev->flags)) { set_bit(R5_Wantwrite, &dev->flags); set_bit(R5_ReWrite, &dev->flags); set_bit(R5_LOCKED, &dev->flags); - s.locked++; + s->locked++; } else { /* let's read it back */ set_bit(R5_Wantread, &dev->flags); set_bit(R5_LOCKED, &dev->flags); - s.locked++; + s->locked++; } } @@ -3227,7 +3220,7 @@ static void handle_stripe5(struct stripe_head *sh) &sh2->state)) atomic_inc(&conf->preread_active_stripes); release_stripe(sh2); - goto unlock; + return; } if (sh2) release_stripe(sh2); @@ -3237,69 +3230,35 @@ static void handle_stripe5(struct stripe_head *sh) for (i = conf->raid_disks; i--; ) { set_bit(R5_Wantwrite, &sh->dev[i].flags); set_bit(R5_LOCKED, &sh->dev[i].flags); - s.locked++; + s->locked++; } } - if (s.expanded && test_bit(STRIPE_EXPANDING, &sh->state) && + if (s->expanded && test_bit(STRIPE_EXPANDING, &sh->state) && !sh->reconstruct_state) { /* Need to write out all blocks after computing parity */ sh->disks = conf->raid_disks; stripe_set_idx(sh->sector, conf, 0, sh); - schedule_reconstruction(sh, &s, 1, 1); - } else if (s.expanded && !sh->reconstruct_state && s.locked == 0) { + schedule_reconstruction(sh, s, 1, 1); + } else if (s->expanded && !sh->reconstruct_state && s->locked == 0) { clear_bit(STRIPE_EXPAND_READY, &sh->state); atomic_dec(&conf->reshape_stripes); wake_up(&conf->wait_for_overlap); md_done_sync(conf->mddev, STRIPE_SECTORS, 1); } - if (s.expanding && s.locked == 0 && + if (s->expanding && s->locked == 0 && !test_bit(STRIPE_COMPUTE_RUN, &sh->state)) handle_stripe_expansion(conf, sh, NULL); - - unlock: - - /* wait for this device to become unblocked */ - if (unlikely(s.blocked_rdev)) - md_wait_for_blocked_rdev(s.blocked_rdev, conf->mddev); - - if (s.ops_request) - raid_run_ops(sh, s.ops_request); - - ops_run_io(sh, &s); - - if (s.dec_preread_active) { - /* We delay this until after ops_run_io so that if make_request - * is waiting on a flush, it won't continue until the writes - * have actually been submitted. - */ - atomic_dec(&conf->preread_active_stripes); - if (atomic_read(&conf->preread_active_stripes) < - IO_THRESHOLD) - md_wakeup_thread(conf->mddev->thread); - } - return_io(s.return_bi); } -static void handle_stripe6(struct stripe_head *sh) +static void handle_stripe6(struct stripe_head *sh, struct stripe_head_state *s) { raid5_conf_t *conf = sh->raid_conf; int disks = sh->disks; int i, pd_idx = sh->pd_idx, qd_idx = sh->qd_idx; - struct stripe_head_state s; struct r5dev *dev, *pdev, *qdev; - pr_debug("handling stripe %llu, state=%#lx cnt=%d, " - "pd_idx=%d, qd_idx=%d\n, check:%d, reconstruct:%d\n", - (unsigned long long)sh->sector, sh->state, - atomic_read(&sh->count), pd_idx, qd_idx, - sh->check_state, sh->reconstruct_state); - memset(&s, 0, sizeof(s)); - - s.syncing = test_bit(STRIPE_SYNCING, &sh->state); - s.expanding = test_bit(STRIPE_EXPAND_SOURCE, &sh->state); - s.expanded = test_bit(STRIPE_EXPAND_READY, &sh->state); /* Now to look around and see what can be done */ rcu_read_lock(); @@ -3320,28 +3279,30 @@ static void handle_stripe6(struct stripe_head *sh) set_bit(R5_Wantfill, &dev->flags); /* now count some things */ - if (test_bit(R5_LOCKED, &dev->flags)) s.locked++; - if (test_bit(R5_UPTODATE, &dev->flags)) s.uptodate++; + if (test_bit(R5_LOCKED, &dev->flags)) + s->locked++; + if (test_bit(R5_UPTODATE, &dev->flags)) + s->uptodate++; if (test_bit(R5_Wantcompute, &dev->flags)) { - s.compute++; - BUG_ON(s.compute > 2); + s->compute++; + BUG_ON(s->compute > 2); } if (test_bit(R5_Wantfill, &dev->flags)) { - s.to_fill++; + s->to_fill++; } else if (dev->toread) - s.to_read++; + s->to_read++; if (dev->towrite) { - s.to_write++; + s->to_write++; if (!test_bit(R5_OVERWRITE, &dev->flags)) - s.non_overwrite++; + s->non_overwrite++; } if (dev->written) - s.written++; + s->written++; rdev = rcu_dereference(conf->disks[i].rdev); - if (s.blocked_rdev == NULL && + if (s->blocked_rdev == NULL && rdev && unlikely(test_bit(Blocked, &rdev->flags))) { - s.blocked_rdev = rdev; + s->blocked_rdev = rdev; atomic_inc(&rdev->nr_pending); } clear_bit(R5_Insync, &dev->flags); @@ -3362,43 +3323,43 @@ static void handle_stripe6(struct stripe_head *sh) if (test_bit(R5_ReadError, &dev->flags)) clear_bit(R5_Insync, &dev->flags); if (!test_bit(R5_Insync, &dev->flags)) { - if (s.failed < 2) - s.failed_num[s.failed] = i; - s.failed++; + if (s->failed < 2) + s->failed_num[s->failed] = i; + s->failed++; } } spin_unlock_irq(&conf->device_lock); rcu_read_unlock(); - if (unlikely(s.blocked_rdev)) { - if (s.syncing || s.expanding || s.expanded || - s.to_write || s.written) { + if (unlikely(s->blocked_rdev)) { + if (s->syncing || s->expanding || s->expanded || + s->to_write || s->written) { set_bit(STRIPE_HANDLE, &sh->state); - goto unlock; + return; } /* There is nothing for the blocked_rdev to block */ - rdev_dec_pending(s.blocked_rdev, conf->mddev); - s.blocked_rdev = NULL; + rdev_dec_pending(s->blocked_rdev, conf->mddev); + s->blocked_rdev = NULL; } - if (s.to_fill && !test_bit(STRIPE_BIOFILL_RUN, &sh->state)) { - set_bit(STRIPE_OP_BIOFILL, &s.ops_request); + if (s->to_fill && !test_bit(STRIPE_BIOFILL_RUN, &sh->state)) { + set_bit(STRIPE_OP_BIOFILL, &s->ops_request); set_bit(STRIPE_BIOFILL_RUN, &sh->state); } pr_debug("locked=%d uptodate=%d to_read=%d" " to_write=%d failed=%d failed_num=%d,%d\n", - s.locked, s.uptodate, s.to_read, s.to_write, s.failed, - s.failed_num[0], s.failed_num[1]); + s->locked, s->uptodate, s->to_read, s->to_write, s->failed, + s->failed_num[0], s->failed_num[1]); /* check if the array has lost >2 devices and, if so, some requests * might need to be failed */ - if (s.failed > 2 && s.to_read+s.to_write+s.written) - handle_failed_stripe(conf, sh, &s, disks, &s.return_bi); - if (s.failed > 2 && s.syncing) { + if (s->failed > 2 && s->to_read+s->to_write+s->written) + handle_failed_stripe(conf, sh, s, disks, &s->return_bi); + if (s->failed > 2 && s->syncing) { md_done_sync(conf->mddev, STRIPE_SECTORS,0); clear_bit(STRIPE_SYNCING, &sh->state); - s.syncing = 0; + s->syncing = 0; } /* @@ -3406,28 +3367,28 @@ static void handle_stripe6(struct stripe_head *sh) * are safe, or on a failed drive */ pdev = &sh->dev[pd_idx]; - s.p_failed = (s.failed >= 1 && s.failed_num[0] == pd_idx) - || (s.failed >= 2 && s.failed_num[1] == pd_idx); + s->p_failed = (s->failed >= 1 && s->failed_num[0] == pd_idx) + || (s->failed >= 2 && s->failed_num[1] == pd_idx); qdev = &sh->dev[qd_idx]; - s.q_failed = (s.failed >= 1 && s.failed_num[0] == qd_idx) - || (s.failed >= 2 && s.failed_num[1] == qd_idx); + s->q_failed = (s->failed >= 1 && s->failed_num[0] == qd_idx) + || (s->failed >= 2 && s->failed_num[1] == qd_idx); - if (s.written && - (s.p_failed || ((test_bit(R5_Insync, &pdev->flags) + if (s->written && + (s->p_failed || ((test_bit(R5_Insync, &pdev->flags) && !test_bit(R5_LOCKED, &pdev->flags) && test_bit(R5_UPTODATE, &pdev->flags)))) && - (s.q_failed || ((test_bit(R5_Insync, &qdev->flags) + (s->q_failed || ((test_bit(R5_Insync, &qdev->flags) && !test_bit(R5_LOCKED, &qdev->flags) && test_bit(R5_UPTODATE, &qdev->flags))))) - handle_stripe_clean_event(conf, sh, disks, &s.return_bi); + handle_stripe_clean_event(conf, sh, disks, &s->return_bi); /* Now we might consider reading some blocks, either to check/generate * parity, or to satisfy requests * or to load a block that is being partially written. */ - if (s.to_read || s.non_overwrite || (s.to_write && s.failed) || - (s.syncing && (s.uptodate + s.compute < disks)) || s.expanding) - handle_stripe_fill6(sh, &s, disks); + if (s->to_read || s->non_overwrite || (s->to_write && s->failed) || + (s->syncing && (s->uptodate + s->compute < disks)) || s->expanding) + handle_stripe_fill6(sh, s, disks); /* Now we check to see if any write operations have recently * completed @@ -3450,12 +3411,12 @@ static void handle_stripe6(struct stripe_head *sh) set_bit(R5_Wantwrite, &dev->flags); if (!test_bit(R5_Insync, &dev->flags) || ((i == sh->pd_idx || i == qd_idx) && - s.failed == 0)) + s->failed == 0)) set_bit(STRIPE_INSYNC, &sh->state); } } if (test_and_clear_bit(STRIPE_PREREAD_ACTIVE, &sh->state)) - s.dec_preread_active = 1; + s->dec_preread_active = 1; } /* Now to consider new write requests and what else, if anything @@ -3464,8 +3425,8 @@ static void handle_stripe6(struct stripe_head *sh) * 2/ A 'check' operation is in flight, as it may clobber the parity * block. */ - if (s.to_write && !sh->reconstruct_state && !sh->check_state) - handle_stripe_dirtying6(conf, sh, &s, disks); + if (s->to_write && !sh->reconstruct_state && !sh->check_state) + handle_stripe_dirtying6(conf, sh, s, disks); /* maybe we need to check and possibly fix the parity for this stripe * Any reads will already have been scheduled, so we just see if enough @@ -3473,12 +3434,13 @@ static void handle_stripe6(struct stripe_head *sh) * dependent operations are in flight. */ if (sh->check_state || - (s.syncing && s.locked == 0 && + (s->syncing && s->locked == 0 && !test_bit(STRIPE_COMPUTE_RUN, &sh->state) && !test_bit(STRIPE_INSYNC, &sh->state))) - handle_parity_checks6(conf, sh, &s, disks); + handle_parity_checks6(conf, sh, s, disks); - if (s.syncing && s.locked == 0 && test_bit(STRIPE_INSYNC, &sh->state)) { + if (s->syncing && s->locked == 0 + && test_bit(STRIPE_INSYNC, &sh->state)) { md_done_sync(conf->mddev, STRIPE_SECTORS,1); clear_bit(STRIPE_SYNCING, &sh->state); } @@ -3486,9 +3448,9 @@ static void handle_stripe6(struct stripe_head *sh) /* If the failed drives are just a ReadError, then we might need * to progress the repair/check process */ - if (s.failed <= 2 && !conf->mddev->ro) - for (i = 0; i < s.failed; i++) { - dev = &sh->dev[s.failed_num[i]]; + if (s->failed <= 2 && !conf->mddev->ro) + for (i = 0; i < s->failed; i++) { + dev = &sh->dev[s->failed_num[i]]; if (test_bit(R5_ReadError, &dev->flags) && !test_bit(R5_LOCKED, &dev->flags) && test_bit(R5_UPTODATE, &dev->flags) @@ -3497,12 +3459,12 @@ static void handle_stripe6(struct stripe_head *sh) set_bit(R5_Wantwrite, &dev->flags); set_bit(R5_ReWrite, &dev->flags); set_bit(R5_LOCKED, &dev->flags); - s.locked++; + s->locked++; } else { /* let's read it back */ set_bit(R5_Wantread, &dev->flags); set_bit(R5_LOCKED, &dev->flags); - s.locked++; + s->locked++; } } } @@ -3514,11 +3476,11 @@ static void handle_stripe6(struct stripe_head *sh) for (i = conf->raid_disks; i--; ) { set_bit(R5_Wantwrite, &sh->dev[i].flags); set_bit(R5_LOCKED, &sh->dev[i].flags); - s.locked++; + s->locked++; } } - if (s.expanded && test_bit(STRIPE_EXPANDING, &sh->state) && + if (s->expanded && test_bit(STRIPE_EXPANDING, &sh->state) && !sh->reconstruct_state) { struct stripe_head *sh2 = get_active_stripe(conf, sh->sector, 1, 1, 1); @@ -3532,7 +3494,7 @@ static void handle_stripe6(struct stripe_head *sh) &sh2->state)) atomic_inc(&conf->preread_active_stripes); release_stripe(sh2); - goto unlock; + return; } if (sh2) release_stripe(sh2); @@ -3540,19 +3502,54 @@ static void handle_stripe6(struct stripe_head *sh) /* Need to write out all blocks after computing P&Q */ sh->disks = conf->raid_disks; stripe_set_idx(sh->sector, conf, 0, sh); - schedule_reconstruction(sh, &s, 1, 1); - } else if (s.expanded && !sh->reconstruct_state && s.locked == 0) { + schedule_reconstruction(sh, s, 1, 1); + } else if (s->expanded && !sh->reconstruct_state && s->locked == 0) { clear_bit(STRIPE_EXPAND_READY, &sh->state); atomic_dec(&conf->reshape_stripes); wake_up(&conf->wait_for_overlap); md_done_sync(conf->mddev, STRIPE_SECTORS, 1); } - if (s.expanding && s.locked == 0 && + if (s->expanding && s->locked == 0 && !test_bit(STRIPE_COMPUTE_RUN, &sh->state)) - handle_stripe_expansion(conf, sh, &s); + handle_stripe_expansion(conf, sh, s); +} + +static void handle_stripe(struct stripe_head *sh) +{ + struct stripe_head_state s; + raid5_conf_t *conf = sh->raid_conf; + + clear_bit(STRIPE_HANDLE, &sh->state); + if (test_and_set_bit(STRIPE_ACTIVE, &sh->state)) { + /* already being handled, ensure it gets handled + * again when current action finishes */ + set_bit(STRIPE_HANDLE, &sh->state); + return; + } + + if (test_and_clear_bit(STRIPE_SYNC_REQUESTED, &sh->state)) { + set_bit(STRIPE_SYNCING, &sh->state); + clear_bit(STRIPE_INSYNC, &sh->state); + } + clear_bit(STRIPE_DELAYED, &sh->state); + + pr_debug("handling stripe %llu, state=%#lx cnt=%d, " + "pd_idx=%d, qd_idx=%d\n, check:%d, reconstruct:%d\n", + (unsigned long long)sh->sector, sh->state, + atomic_read(&sh->count), sh->pd_idx, sh->qd_idx, + sh->check_state, sh->reconstruct_state); + memset(&s, 0, sizeof(s)); + + s.syncing = test_bit(STRIPE_SYNCING, &sh->state); + s.expanding = test_bit(STRIPE_EXPAND_SOURCE, &sh->state); + s.expanded = test_bit(STRIPE_EXPAND_READY, &sh->state); + + if (conf->level == 6) + handle_stripe6(sh, &s); + else + handle_stripe5(sh, &s); - unlock: /* wait for this device to become unblocked */ if (unlikely(s.blocked_rdev)) @@ -3576,28 +3573,7 @@ static void handle_stripe6(struct stripe_head *sh) } return_io(s.return_bi); -} -static void handle_stripe(struct stripe_head *sh) -{ - clear_bit(STRIPE_HANDLE, &sh->state); - if (test_and_set_bit(STRIPE_ACTIVE, &sh->state)) { - /* already being handled, ensure it gets handled - * again when current action finishes */ - set_bit(STRIPE_HANDLE, &sh->state); - return; - } - - if (test_and_clear_bit(STRIPE_SYNC_REQUESTED, &sh->state)) { - set_bit(STRIPE_SYNCING, &sh->state); - clear_bit(STRIPE_INSYNC, &sh->state); - } - clear_bit(STRIPE_DELAYED, &sh->state); - - if (sh->raid_conf->level == 6) - handle_stripe6(sh); - else - handle_stripe5(sh); clear_bit(STRIPE_ACTIVE, &sh->state); } -- cgit v1.2.3