Merge git://git.infradead.org/~dwmw2/mtd-2.6.35

[pandora-kernel.git] / drivers / block / drbd / drbd_main.c

diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index be2d2da..6b077f9 100644 (file)
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -1215,18 +1215,17 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
             ns.pdsk == D_OUTDATED)) {
                if (get_ldev(mdev)) {
                        if ((ns.role == R_PRIMARY || ns.peer == R_PRIMARY) &&
-                           mdev->ldev->md.uuid[UI_BITMAP] == 0 && ns.disk >= D_UP_TO_DATE &&
-                           !atomic_read(&mdev->new_c_uuid))
-                               atomic_set(&mdev->new_c_uuid, 2);
+                           mdev->ldev->md.uuid[UI_BITMAP] == 0 && ns.disk >= D_UP_TO_DATE) {
+                               drbd_uuid_new_current(mdev);
+                               drbd_send_uuids(mdev);
+                       }
                        put_ldev(mdev);
                }
        }
 
        if (ns.pdsk < D_INCONSISTENT && get_ldev(mdev)) {
-               /* Diskless peer becomes primary or got connected do diskless, primary peer. */
-               if (ns.peer == R_PRIMARY && mdev->ldev->md.uuid[UI_BITMAP] == 0 &&
-                   !atomic_read(&mdev->new_c_uuid))
-                       atomic_set(&mdev->new_c_uuid, 2);
+               if (ns.peer == R_PRIMARY && mdev->ldev->md.uuid[UI_BITMAP] == 0)
+                       drbd_uuid_new_current(mdev);
 
                /* D_DISKLESS Peer becomes secondary */
                if (os.peer == R_PRIMARY && ns.peer == R_SECONDARY)
@@ -1350,24 +1349,6 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
        drbd_md_sync(mdev);
 }
 
-static int w_new_current_uuid(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
-{
-       if (get_ldev(mdev)) {
-               if (mdev->ldev->md.uuid[UI_BITMAP] == 0) {
-                       drbd_uuid_new_current(mdev);
-                       if (get_net_conf(mdev)) {
-                               drbd_send_uuids(mdev);
-                               put_net_conf(mdev);
-                       }
-                       drbd_md_sync(mdev);
-               }
-               put_ldev(mdev);
-       }
-       atomic_dec(&mdev->new_c_uuid);
-       wake_up(&mdev->misc_wait);
-
-       return 1;
-}
 
 static int drbd_thread_setup(void *arg)
 {
@@ -2291,9 +2272,9 @@ static int we_should_drop_the_connection(struct drbd_conf *mdev, struct socket *
  * with page_count == 0 or PageSlab.
  */
 static int _drbd_no_send_page(struct drbd_conf *mdev, struct page *page,
-                  int offset, size_t size)
+                  int offset, size_t size, unsigned msg_flags)
 {
-       int sent = drbd_send(mdev, mdev->data.socket, kmap(page) + offset, size, 0);
+       int sent = drbd_send(mdev, mdev->data.socket, kmap(page) + offset, size, msg_flags);
        kunmap(page);
        if (sent == size)
                mdev->send_cnt += size>>9;
@@ -2301,7 +2282,7 @@ static int _drbd_no_send_page(struct drbd_conf *mdev, struct page *page,
 }
 
 static int _drbd_send_page(struct drbd_conf *mdev, struct page *page,
-                   int offset, size_t size)
+                   int offset, size_t size, unsigned msg_flags)
 {
        mm_segment_t oldfs = get_fs();
        int sent, ok;
@@ -2314,14 +2295,15 @@ static int _drbd_send_page(struct drbd_conf *mdev, struct page *page,
         * __page_cache_release a page that would actually still be referenced
         * by someone, leading to some obscure delayed Oops somewhere else. */
        if (disable_sendpage || (page_count(page) < 1) || PageSlab(page))
-               return _drbd_no_send_page(mdev, page, offset, size);
+               return _drbd_no_send_page(mdev, page, offset, size, msg_flags);
 
+       msg_flags |= MSG_NOSIGNAL;
        drbd_update_congested(mdev);
        set_fs(KERNEL_DS);
        do {
                sent = mdev->data.socket->ops->sendpage(mdev->data.socket, page,
                                                        offset, len,
-                                                       MSG_NOSIGNAL);
+                                                       msg_flags);
                if (sent == -EAGAIN) {
                        if (we_should_drop_the_connection(mdev,
                                                          mdev->data.socket))
@@ -2350,9 +2332,11 @@ static int _drbd_send_bio(struct drbd_conf *mdev, struct bio *bio)
 {
        struct bio_vec *bvec;
        int i;
+       /* hint all but last page with MSG_MORE */
        __bio_for_each_segment(bvec, bio, i, 0) {
                if (!_drbd_no_send_page(mdev, bvec->bv_page,
-                                    bvec->bv_offset, bvec->bv_len))
+                                    bvec->bv_offset, bvec->bv_len,
+                                    i == bio->bi_vcnt -1 ? 0 : MSG_MORE))
                        return 0;
        }
        return 1;
@@ -2362,12 +2346,13 @@ static int _drbd_send_zc_bio(struct drbd_conf *mdev, struct bio *bio)
 {
        struct bio_vec *bvec;
        int i;
+       /* hint all but last page with MSG_MORE */
        __bio_for_each_segment(bvec, bio, i, 0) {
                if (!_drbd_send_page(mdev, bvec->bv_page,
-                                    bvec->bv_offset, bvec->bv_len))
+                                    bvec->bv_offset, bvec->bv_len,
+                                    i == bio->bi_vcnt -1 ? 0 : MSG_MORE))
                        return 0;
        }
-
        return 1;
 }
 
@@ -2375,9 +2360,11 @@ static int _drbd_send_zc_ee(struct drbd_conf *mdev, struct drbd_epoch_entry *e)
 {
        struct page *page = e->pages;
        unsigned len = e->size;
+       /* hint all but last page with MSG_MORE */
        page_chain_for_each(page) {
                unsigned l = min_t(unsigned, len, PAGE_SIZE);
-               if (!_drbd_send_page(mdev, page, 0, l))
+               if (!_drbd_send_page(mdev, page, 0, l,
+                               page_chain_next(page) ? MSG_MORE : 0))
                        return 0;
                len -= l;
        }
@@ -2457,11 +2444,11 @@ int drbd_send_dblock(struct drbd_conf *mdev, struct drbd_request *req)
        p.dp_flags = cpu_to_be32(dp_flags);
        set_bit(UNPLUG_REMOTE, &mdev->flags);
        ok = (sizeof(p) ==
-               drbd_send(mdev, mdev->data.socket, &p, sizeof(p), MSG_MORE));
+               drbd_send(mdev, mdev->data.socket, &p, sizeof(p), dgs ? MSG_MORE : 0));
        if (ok && dgs) {
                dgb = mdev->int_dig_out;
                drbd_csum_bio(mdev, mdev->integrity_w_tfm, req->master_bio, dgb);
-               ok = drbd_send(mdev, mdev->data.socket, dgb, dgs, MSG_MORE);
+               ok = drbd_send(mdev, mdev->data.socket, dgb, dgs, 0);
        }
        if (ok) {
                if (mdev->net_conf->wire_protocol == DRBD_PROT_A)
@@ -2510,11 +2497,11 @@ int drbd_send_block(struct drbd_conf *mdev, enum drbd_packets cmd,
                return 0;
 
        ok = sizeof(p) == drbd_send(mdev, mdev->data.socket, &p,
-                                       sizeof(p), MSG_MORE);
+                                       sizeof(p), dgs ? MSG_MORE : 0);
        if (ok && dgs) {
                dgb = mdev->int_dig_out;
                drbd_csum_ee(mdev, mdev->integrity_w_tfm, e, dgb);
-               ok = drbd_send(mdev, mdev->data.socket, dgb, dgs, MSG_MORE);
+               ok = drbd_send(mdev, mdev->data.socket, dgb, dgs, 0);
        }
        if (ok)
                ok = _drbd_send_zc_ee(mdev, e);
@@ -2708,7 +2695,6 @@ void drbd_init_set_defaults(struct drbd_conf *mdev)
        atomic_set(&mdev->net_cnt, 0);
        atomic_set(&mdev->packet_seq, 0);
        atomic_set(&mdev->pp_in_use, 0);
-       atomic_set(&mdev->new_c_uuid, 0);
 
        mutex_init(&mdev->md_io_mutex);
        mutex_init(&mdev->data.mutex);
@@ -2739,14 +2725,12 @@ void drbd_init_set_defaults(struct drbd_conf *mdev)
        INIT_LIST_HEAD(&mdev->bm_io_work.w.list);
        INIT_LIST_HEAD(&mdev->delay_probes);
        INIT_LIST_HEAD(&mdev->delay_probe_work.list);
-       INIT_LIST_HEAD(&mdev->uuid_work.list);
 
        mdev->resync_work.cb  = w_resync_inactive;
        mdev->unplug_work.cb  = w_send_write_hint;
        mdev->md_sync_work.cb = w_md_sync;
        mdev->bm_io_work.w.cb = w_bitmap_io;
        mdev->delay_probe_work.cb = w_delay_probes;
-       mdev->uuid_work.cb = w_new_current_uuid;
        init_timer(&mdev->resync_timer);
        init_timer(&mdev->md_sync_timer);
        init_timer(&mdev->delay_probe_timer);
@@ -3799,7 +3783,7 @@ _drbd_insert_fault(struct drbd_conf *mdev, unsigned int type)
        if (ret) {
                fault_count++;
 
-               if (printk_ratelimit())
+               if (__ratelimit(&drbd_ratelimit_state))
                        dev_warn(DEV, "***Simulating %s failure\n",
                                _drbd_fault_str(type));
        }