diff options
| -rw-r--r-- | drivers/block/drbd/drbd_actlog.c | 21 | ||||
| -rw-r--r-- | drivers/block/drbd/drbd_int.h | 7 | ||||
| -rw-r--r-- | drivers/block/drbd/drbd_main.c | 57 | ||||
| -rw-r--r-- | drivers/block/drbd/drbd_nl.c | 137 | ||||
| -rw-r--r-- | drivers/block/drbd/drbd_receiver.c | 2 | ||||
| -rw-r--r-- | include/linux/drbd.h | 6 | ||||
| -rw-r--r-- | include/linux/drbd_genl.h | 2 | ||||
| -rw-r--r-- | include/linux/drbd_limits.h | 9 |
8 files changed, 188 insertions, 53 deletions
diff --git a/drivers/block/drbd/drbd_actlog.c b/drivers/block/drbd/drbd_actlog.c index 6608076..28c73ca 100644 --- a/drivers/block/drbd/drbd_actlog.c +++ b/drivers/block/drbd/drbd_actlog.c @@ -659,6 +659,27 @@ void drbd_al_shrink(struct drbd_conf *mdev) wake_up(&mdev->al_wait); } +int drbd_initialize_al(struct drbd_conf *mdev, void *buffer) +{ + struct al_transaction_on_disk *al = buffer; + struct drbd_md *md = &mdev->ldev->md; + sector_t al_base = md->md_offset + md->al_offset; + int al_size_4k = md->al_stripes * md->al_stripe_size_4k; + int i; + + memset(al, 0, 4096); + al->magic = cpu_to_be32(DRBD_AL_MAGIC); + al->transaction_type = cpu_to_be16(AL_TR_INITIALIZED); + al->crc32c = cpu_to_be32(crc32c(0, al, 4096)); + + for (i = 0; i < al_size_4k; i++) { + int err = drbd_md_sync_page_io(mdev, mdev->ldev, al_base + i * 8, WRITE); + if (err) + return err; + } + return 0; +} + static int w_update_odbm(struct drbd_work *w, int unused) { struct update_odbm_work *udw = container_of(w, struct update_odbm_work, w); diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h index 4519d63..2d7f608 100644 --- a/drivers/block/drbd/drbd_int.h +++ b/drivers/block/drbd/drbd_int.h @@ -1133,6 +1133,7 @@ extern void drbd_mdev_cleanup(struct drbd_conf *mdev); void drbd_print_uuids(struct drbd_conf *mdev, const char *text); extern void conn_md_sync(struct drbd_tconn *tconn); +extern void drbd_md_write(struct drbd_conf *mdev, void *buffer); extern void drbd_md_sync(struct drbd_conf *mdev); extern int drbd_md_read(struct drbd_conf *mdev, struct drbd_backing_dev *bdev); extern void drbd_uuid_set(struct drbd_conf *mdev, int idx, u64 val) __must_hold(local); @@ -1468,12 +1469,15 @@ extern void drbd_resume_io(struct drbd_conf *mdev); extern char *ppsize(char *buf, unsigned long long size); extern sector_t drbd_new_dev_size(struct drbd_conf *, struct drbd_backing_dev *, sector_t, int); enum determine_dev_size { + DS_ERROR_SHRINK = -3, + DS_ERROR_SPACE_MD = -2, DS_ERROR = -1, DS_UNCHANGED = 0, DS_SHRUNK = 1, DS_GREW = 2 }; -extern enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *, enum dds_flags) __must_hold(local); +extern enum determine_dev_size +drbd_determine_dev_size(struct drbd_conf *, enum dds_flags, struct resize_parms *) __must_hold(local); extern void resync_after_online_grow(struct drbd_conf *); extern void drbd_reconsider_max_bio_size(struct drbd_conf *mdev); extern enum drbd_state_rv drbd_set_role(struct drbd_conf *mdev, @@ -1639,6 +1643,7 @@ extern int __drbd_set_out_of_sync(struct drbd_conf *mdev, sector_t sector, #define drbd_set_out_of_sync(mdev, sector, size) \ __drbd_set_out_of_sync(mdev, sector, size, __FILE__, __LINE__) extern void drbd_al_shrink(struct drbd_conf *mdev); +extern int drbd_initialize_al(struct drbd_conf *, void *); /* drbd_nl.c */ /* state info broadcast */ diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index 49040a3..55635ed 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -2879,34 +2879,14 @@ struct meta_data_on_disk { u8 reserved_u8[4096 - (7*8 + 10*4)]; } __packed; -/** - * drbd_md_sync() - Writes the meta data super block if the MD_DIRTY flag bit is set - * @mdev: DRBD device. - */ -void drbd_md_sync(struct drbd_conf *mdev) + + +void drbd_md_write(struct drbd_conf *mdev, void *b) { - struct meta_data_on_disk *buffer; + struct meta_data_on_disk *buffer = b; sector_t sector; int i; - /* Don't accidentally change the DRBD meta data layout. */ - BUILD_BUG_ON(UI_SIZE != 4); - BUILD_BUG_ON(sizeof(struct meta_data_on_disk) != 4096); - - del_timer(&mdev->md_sync_timer); - /* timer may be rearmed by drbd_md_mark_dirty() now. */ - if (!test_and_clear_bit(MD_DIRTY, &mdev->flags)) - return; - - /* We use here D_FAILED and not D_ATTACHING because we try to write - * metadata even if we detach due to a disk failure! */ - if (!get_ldev_if_state(mdev, D_FAILED)) - return; - - buffer = drbd_md_get_buffer(mdev); - if (!buffer) - goto out; - memset(buffer, 0, sizeof(*buffer)); buffer->la_size_sect = cpu_to_be64(drbd_get_capacity(mdev->this_bdev)); @@ -2935,6 +2915,35 @@ void drbd_md_sync(struct drbd_conf *mdev) dev_err(DEV, "meta data update failed!\n"); drbd_chk_io_error(mdev, 1, DRBD_META_IO_ERROR); } +} + +/** + * drbd_md_sync() - Writes the meta data super block if the MD_DIRTY flag bit is set + * @mdev: DRBD device. + */ +void drbd_md_sync(struct drbd_conf *mdev) +{ + struct meta_data_on_disk *buffer; + + /* Don't accidentally change the DRBD meta data layout. */ + BUILD_BUG_ON(UI_SIZE != 4); + BUILD_BUG_ON(sizeof(struct meta_data_on_disk) != 4096); + + del_timer(&mdev->md_sync_timer); + /* timer may be rearmed by drbd_md_mark_dirty() now. */ + if (!test_and_clear_bit(MD_DIRTY, &mdev->flags)) + return; + + /* We use here D_FAILED and not D_ATTACHING because we try to write + * metadata even if we detach due to a disk failure! */ + if (!get_ldev_if_state(mdev, D_FAILED)) + return; + + buffer = drbd_md_get_buffer(mdev); + if (!buffer) + goto out; + + drbd_md_write(mdev, buffer); /* Update mdev->ldev->md.la_size_sect, * since we updated it on metadata. */ diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c index 45d1275..8cc1e64 100644 --- a/drivers/block/drbd/drbd_nl.c +++ b/drivers/block/drbd/drbd_nl.c @@ -827,12 +827,17 @@ void drbd_resume_io(struct drbd_conf *mdev) * Returns 0 on success, negative return values indicate errors. * You should call drbd_md_sync() after calling this function. */ -enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds_flags flags) __must_hold(local) +enum determine_dev_size +drbd_determine_dev_size(struct drbd_conf *mdev, enum dds_flags flags, struct resize_parms *rs) __must_hold(local) { sector_t prev_first_sect, prev_size; /* previous meta location */ sector_t la_size_sect, u_size; + struct drbd_md *md = &mdev->ldev->md; + u32 prev_al_stripe_size_4k; + u32 prev_al_stripes; sector_t size; char ppb[10]; + void *buffer; int md_moved, la_size_changed; enum determine_dev_size rv = DS_UNCHANGED; @@ -847,6 +852,11 @@ enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds * still lock the act_log to not trigger ASSERTs there. */ drbd_suspend_io(mdev); + buffer = drbd_md_get_buffer(mdev); /* Lock meta-data IO */ + if (!buffer) { + drbd_resume_io(mdev); + return DS_ERROR; + } /* no wait necessary anymore, actually we could assert that */ wait_event(mdev->al_wait, lc_try_lock(mdev->act_log)); @@ -855,7 +865,17 @@ enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds prev_size = mdev->ldev->md.md_size_sect; la_size_sect = mdev->ldev->md.la_size_sect; - /* TODO: should only be some assert here, not (re)init... */ + if (rs) { + /* rs is non NULL if we should change the AL layout only */ + + prev_al_stripes = md->al_stripes; + prev_al_stripe_size_4k = md->al_stripe_size_4k; + + md->al_stripes = rs->al_stripes; + md->al_stripe_size_4k = rs->al_stripe_size / 4; + md->al_size_4k = (u64)rs->al_stripes * rs->al_stripe_size / 4; + } + drbd_md_set_sector_offsets(mdev, mdev->ldev); rcu_read_lock(); @@ -863,6 +883,21 @@ enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds rcu_read_unlock(); size = drbd_new_dev_size(mdev, mdev->ldev, u_size, flags & DDSF_FORCED); + if (size < la_size_sect) { + if (rs && u_size == 0) { + /* Remove "rs &&" later. This check should always be active, but + right now the receiver expects the permissive behavior */ + dev_warn(DEV, "Implicit shrink not allowed. " + "Use --size=%llus for explicit shrink.\n", + (unsigned long long)size); + rv = DS_ERROR_SHRINK; + } + if (u_size > size) + rv = DS_ERROR_SPACE_MD; + if (rv != DS_UNCHANGED) + goto err_out; + } + if (drbd_get_capacity(mdev->this_bdev) != size || drbd_bm_capacity(mdev) != size) { int err; @@ -886,38 +921,57 @@ enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds dev_info(DEV, "size = %s (%llu KB)\n", ppsize(ppb, size>>1), (unsigned long long)size>>1); } - if (rv == DS_ERROR) - goto out; + if (rv <= DS_ERROR) + goto err_out; la_size_changed = (la_size_sect != mdev->ldev->md.la_size_sect); md_moved = prev_first_sect != drbd_md_first_sector(mdev->ldev) || prev_size != mdev->ldev->md.md_size_sect; - if (la_size_changed || md_moved) { - int err; + if (la_size_changed || md_moved || rs) { + u32 prev_flags; drbd_al_shrink(mdev); /* All extents inactive. */ + + prev_flags = md->flags; + md->flags &= ~MDF_PRIMARY_IND; + drbd_md_write(mdev, buffer); + dev_info(DEV, "Writing the whole bitmap, %s\n", la_size_changed && md_moved ? "size changed and md moved" : la_size_changed ? "size changed" : "md moved"); /* next line implicitly does drbd_suspend_io()+drbd_resume_io() */ - err = drbd_bitmap_io(mdev, md_moved ? &drbd_bm_write_all : &drbd_bm_write, - "size changed", BM_LOCKED_MASK); - if (err) { - rv = DS_ERROR; - goto out; - } - drbd_md_mark_dirty(mdev); + drbd_bitmap_io(mdev, md_moved ? &drbd_bm_write_all : &drbd_bm_write, + "size changed", BM_LOCKED_MASK); + drbd_initialize_al(mdev, buffer); + + md->flags = prev_flags; + drbd_md_write(mdev, buffer); + + if (rs) + dev_info(DEV, "Changed AL layout to al-stripes = %d, al-stripe-size-kB = %d\n", + md->al_stripes, md->al_stripe_size_4k * 4); } if (size > la_size_sect) rv = DS_GREW; if (size < la_size_sect) rv = DS_SHRUNK; -out: + + if (0) { + err_out: + if (rs) { + md->al_stripes = prev_al_stripes; + md->al_stripe_size_4k = prev_al_stripe_size_4k; + md->al_size_4k = (u64)prev_al_stripes * prev_al_stripe_size_4k; + + drbd_md_set_sector_offsets(mdev, mdev->ldev); + } + } lc_unlock(mdev->act_log); wake_up(&mdev->al_wait); + drbd_md_put_buffer(mdev); drbd_resume_io(mdev); return rv; @@ -1618,8 +1672,8 @@ int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info) !drbd_md_test_flag(mdev->ldev, MDF_CONNECTED_IND)) set_bit(USE_DEGR_WFC_T, &mdev->flags); - dd = drbd_determine_dev_size(mdev, 0); - if (dd == DS_ERROR) { + dd = drbd_determine_dev_size(mdev, 0, NULL); + if (dd <= DS_ERROR) { retcode = ERR_NOMEM_BITMAP; goto force_diskless_dec; } else if (dd == DS_GREW) @@ -2316,6 +2370,7 @@ int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info) struct drbd_conf *mdev; enum drbd_ret_code retcode; enum determine_dev_size dd; + bool change_al_layout = false; enum dds_flags ddsf; sector_t u_size; int err; @@ -2326,31 +2381,33 @@ int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info) if (retcode != NO_ERROR) goto fail; + mdev = adm_ctx.mdev; + if (!get_ldev(mdev)) { + retcode = ERR_NO_DISK; + goto fail; + } + memset(&rs, 0, sizeof(struct resize_parms)); + rs.al_stripes = mdev->ldev->md.al_stripes; + rs.al_stripe_size = mdev->ldev->md.al_stripe_size_4k * 4; if (info->attrs[DRBD_NLA_RESIZE_PARMS]) { err = resize_parms_from_attrs(&rs, info); if (err) { retcode = ERR_MANDATORY_TAG; drbd_msg_put_info(from_attrs_err_to_txt(err)); - goto fail; + goto fail_ldev; } } - mdev = adm_ctx.mdev; if (mdev->state.conn > C_CONNECTED) { retcode = ERR_RESIZE_RESYNC; - goto fail; + goto fail_ldev; } if (mdev->state.role == R_SECONDARY && mdev->state.peer == R_SECONDARY) { retcode = ERR_NO_PRIMARY; - goto fail; - } - - if (!get_ldev(mdev)) { - retcode = ERR_NO_DISK; - goto fail; + goto fail_ldev; } if (rs.no_resync && mdev->tconn->agreed_pro_version < 93) { @@ -2369,6 +2426,28 @@ int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info) } } + if (mdev->ldev->md.al_stripes != rs.al_stripes || + mdev->ldev->md.al_stripe_size_4k != rs.al_stripe_size / 4) { + u32 al_size_k = rs.al_stripes * rs.al_stripe_size; + + if (al_size_k > (16 * 1024 * 1024)) { + retcode = ERR_MD_LAYOUT_TOO_BIG; + goto fail_ldev; + } + + if (al_size_k < MD_32kB_SECT/2) { + retcode = ERR_MD_LAYOUT_TOO_SMALL; + goto fail_ldev; + } + + if (mdev->state.conn != C_CONNECTED) { + retcode = ERR_MD_LAYOUT_CONNECTED; + goto fail_ldev; + } + + change_al_layout = true; + } + if (mdev->ldev->known_size != drbd_get_capacity(mdev->ldev->backing_bdev)) mdev->ldev->known_size = drbd_get_capacity(mdev->ldev->backing_bdev); @@ -2384,12 +2463,18 @@ int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info) } ddsf = (rs.resize_force ? DDSF_FORCED : 0) | (rs.no_resync ? DDSF_NO_RESYNC : 0); - dd = drbd_determine_dev_size(mdev, ddsf); + dd = drbd_determine_dev_size(mdev, ddsf, change_al_layout ? &rs : NULL); drbd_md_sync(mdev); put_ldev(mdev); if (dd == DS_ERROR) { retcode = ERR_NOMEM_BITMAP; goto fail; + } else if (dd == DS_ERROR_SPACE_MD) { + retcode = ERR_MD_LAYOUT_NO_FIT; + goto fail; + } else if (dd == DS_ERROR_SHRINK) { + retcode = ERR_IMPLICIT_SHRINK; + goto fail; } if (mdev->state.conn == C_CONNECTED) { diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index 26852b8..cc29cd3 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -3617,7 +3617,7 @@ static int receive_sizes(struct drbd_tconn *tconn, struct packet_info *pi) ddsf = be16_to_cpu(p->dds_flags); if (get_ldev(mdev)) { - dd = drbd_determine_dev_size(mdev, ddsf); + dd = drbd_determine_dev_size(mdev, ddsf, NULL); put_ldev(mdev); if (dd == DS_ERROR) return -EIO; diff --git a/include/linux/drbd.h b/include/linux/drbd.h index 1b4d4ee..de7d74a 100644 --- a/include/linux/drbd.h +++ b/include/linux/drbd.h @@ -177,7 +177,11 @@ enum drbd_ret_code { ERR_NEED_APV_100 = 163, ERR_NEED_ALLOW_TWO_PRI = 164, ERR_MD_UNCLEAN = 165, - + ERR_MD_LAYOUT_CONNECTED = 166, + ERR_MD_LAYOUT_TOO_BIG = 167, + ERR_MD_LAYOUT_TOO_SMALL = 168, + ERR_MD_LAYOUT_NO_FIT = 169, + ERR_IMPLICIT_SHRINK = 170, /* insert new ones above this line */ AFTER_LAST_ERR_CODE }; diff --git a/include/linux/drbd_genl.h b/include/linux/drbd_genl.h index d0d8fac..e8c4457 100644 --- a/include/linux/drbd_genl.h +++ b/include/linux/drbd_genl.h @@ -181,6 +181,8 @@ GENL_struct(DRBD_NLA_RESIZE_PARMS, 7, resize_parms, __u64_field(1, DRBD_GENLA_F_MANDATORY, resize_size) __flg_field(2, DRBD_GENLA_F_MANDATORY, resize_force) __flg_field(3, DRBD_GENLA_F_MANDATORY, no_resync) + __u32_field_def(4, 0 /* OPTIONAL */, al_stripes, DRBD_AL_STRIPES_DEF) + __u32_field_def(5, 0 /* OPTIONAL */, al_stripe_size, DRBD_AL_STRIPE_SIZE_DEF) ) GENL_struct(DRBD_NLA_STATE_INFO, 8, state_info, diff --git a/include/linux/drbd_limits.h b/include/linux/drbd_limits.h index 1fedf2b..17e50bb 100644 --- a/include/linux/drbd_limits.h +++ b/include/linux/drbd_limits.h @@ -215,4 +215,13 @@ #define DRBD_ALWAYS_ASBP_DEF 0 #define DRBD_USE_RLE_DEF 1 +#define DRBD_AL_STRIPES_MIN 1 +#define DRBD_AL_STRIPES_MAX 1024 +#define DRBD_AL_STRIPES_DEF 1 +#define DRBD_AL_STRIPES_SCALE '1' + +#define DRBD_AL_STRIPE_SIZE_MIN 4 +#define DRBD_AL_STRIPE_SIZE_MAX 16777216 +#define DRBD_AL_STRIPE_SIZE_DEF 32 +#define DRBD_AL_STRIPE_SIZE_SCALE 'k' /* kilobytes */ #endif |