From patchwork Fri Aug 23 10:10:11 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Naohiro Aota X-Patchwork-Id: 11111315 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CF23E13A4 for ; Fri, 23 Aug 2019 10:11:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9973B233FE for ; Fri, 23 Aug 2019 10:11:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=wdc.com header.i=@wdc.com header.b="NGMf7tMO" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404129AbfHWKLP (ORCPT ); Fri, 23 Aug 2019 06:11:15 -0400 Received: from esa3.hgst.iphmx.com ([216.71.153.141]:47764 "EHLO esa3.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403955AbfHWKLP (ORCPT ); Fri, 23 Aug 2019 06:11:15 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1566555074; x=1598091074; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=HcRZl54N6cDqJ1/3YiP4NeC3nqSIvHaZZZE4W/u6D38=; b=NGMf7tMOLPoZ4x0VDGz7Ww4p9gDN4xZVV4+DAqCmgKJmiwAa+UP9Llxq CevWCX6u0DIdWRJnRFsAlrIIxzYUoCrwSWAOJCz5/pxv3r71+C09G23wv dmEwBgJY167SKcrfrE/DUoSNOCXYzi433f+3nnE54UfnCeDINy5ZyuOAM S8dhMiVbOTINE0ByNRWoprZJ9Sdq5xVcFa8OahzNtWjV+T8mbW2fe7sw+ QJv1ftdM/y80MHFL02mC/fFrOlnXVZ/SJljlxkq1VjI8h6jVCbdYBChNl HCrgrdWLRouULufyvrTCw4F7MtMR5WtkvxSp+DNdC9xgvFg7mK30HnMBm g==; IronPort-SDR: lrgTFPOgYwZYVd5jHyj0ucC7FpjTQ4BgLWun5KjlED01ZNmGk54VAj2/Uz8Oso3guqiosDAyxY 8RKh8rfCzG3HneiVRFwS/Mqz6FU1nWtdrm/kH+6fxglr4NoxugpGrUptpGV8pmpNJwBD7+EPv8 ErGFWMbflwnrLeexX0bTSFqlXlsfSbvZSUoyt5WKvqpWpvHyuAX6af1mCTRrbJt1AxDJGSwC00 dw/uEzKCix1XuVWnu9tolmm5D1lIbkfZO76O8W21hEM1Bxmyvi5SSrhWhm5qxlSByd0cnDpZUZ KtA= X-IronPort-AV: E=Sophos;i="5.64,420,1559491200"; d="scan'208";a="121096231" Received: from uls-op-cesaip01.wdc.com (HELO uls-op-cesaep01.wdc.com) ([199.255.45.14]) by ob1.hgst.iphmx.com with ESMTP; 23 Aug 2019 18:11:14 +0800 IronPort-SDR: J4D3o852WaIHz/Zp9wX/+eOxSV6Xejn2EuukQXKvHqfWl2wbCPGvy2IEUssyYAUifJ0m5jbvT3 O+NGDY9bDRBvJGhNZG2Mks6oKyQI58P+HtgAfTOYermexWg7ZVgpMzRj/3aGQO9Onu6DgcoMXV zGajqkm3e//jpP21LbBN7sa5LCI5xkdfBJ8e3LWpipx/C+8Zeq81xYOMdR3RiCv+9me3IXviov /ie5HekK66wW9A1AEWs1URiEni1eLAAibQi7PfpmrPRrjeB10MeEph0qrlyQbEyLkVDExg4LdY 3hEndzPOwrFRypT8rb2ogSvU Received: from uls-op-cesaip02.wdc.com ([10.248.3.37]) by uls-op-cesaep01.wdc.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Aug 2019 03:08:32 -0700 IronPort-SDR: 9CXjUJ9nCk/vTrzwBqSsA7CdOEiQzuPRC+EVyndAbUs47Zbt4voxWH/DW8hkX7oBuaVZqr3Bq/ Iq7okdbSZoPcV2TIqd+xyK0nz/HHfv1tSa5elmQRA/6bJl25qNcaXLPCr4LJWkQ1789WKvUVYF Lo1E5v5XQpbU36ELl4hdhfzRPJmycQKz+KgsyoUusvBjITaKDR5k5R9gdXRHISVWKsgCZeCXtC gb74IFrsqMngHJcxr+xh4OpoYoDLBXdhrYBIKGSI2lmbauNqlOmWoUoA46irFGTmEu5Zn+zBEu /gI= WDCIronportException: Internal Received: from naota.dhcp.fujisawa.hgst.com (HELO naota.fujisawa.hgst.com) ([10.149.53.115]) by uls-op-cesaip02.wdc.com with ESMTP; 23 Aug 2019 03:11:12 -0700 From: Naohiro Aota To: linux-btrfs@vger.kernel.org, David Sterba Cc: Chris Mason , Josef Bacik , Nikolay Borisov , Damien Le Moal , Matias Bjorling , Johannes Thumshirn , Hannes Reinecke , Anand Jain , linux-fsdevel@vger.kernel.org, Naohiro Aota Subject: [PATCH v4 02/27] btrfs: Get zone information of zoned block devices Date: Fri, 23 Aug 2019 19:10:11 +0900 Message-Id: <20190823101036.796932-3-naohiro.aota@wdc.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20190823101036.796932-1-naohiro.aota@wdc.com> References: <20190823101036.796932-1-naohiro.aota@wdc.com> MIME-Version: 1.0 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org If a zoned block device is found, get its zone information (number of zones and zone size) using the new helper function btrfs_get_dev_zonetypes(). To avoid costly run-time zone report commands to test the device zones type during block allocation, attach the seq_zones bitmap to the device structure to indicate if a zone is sequential or accept random writes. Also it attaches the empty_zones bitmap to indicate if a zone is empty or not. This patch also introduces the helper function btrfs_dev_is_sequential() to test if the zone storing a block is a sequential write required zone and btrfs_dev_is_empty_zone() to test if the zone is a empty zone. Signed-off-by: Damien Le Moal Signed-off-by: Naohiro Aota --- fs/btrfs/Makefile | 2 +- fs/btrfs/hmzoned.c | 159 +++++++++++++++++++++++++++++++++++++++++++++ fs/btrfs/hmzoned.h | 79 ++++++++++++++++++++++ fs/btrfs/volumes.c | 18 ++++- fs/btrfs/volumes.h | 4 ++ 5 files changed, 259 insertions(+), 3 deletions(-) create mode 100644 fs/btrfs/hmzoned.c create mode 100644 fs/btrfs/hmzoned.h diff --git a/fs/btrfs/Makefile b/fs/btrfs/Makefile index 76a843198bcb..8d93abb31074 100644 --- a/fs/btrfs/Makefile +++ b/fs/btrfs/Makefile @@ -11,7 +11,7 @@ btrfs-y += super.o ctree.o extent-tree.o print-tree.o root-tree.o dir-item.o \ compression.o delayed-ref.o relocation.o delayed-inode.o scrub.o \ reada.o backref.o ulist.o qgroup.o send.o dev-replace.o raid56.o \ uuid-tree.o props.o free-space-tree.o tree-checker.o space-info.o \ - block-rsv.o delalloc-space.o + block-rsv.o delalloc-space.o hmzoned.o btrfs-$(CONFIG_BTRFS_FS_POSIX_ACL) += acl.o btrfs-$(CONFIG_BTRFS_FS_CHECK_INTEGRITY) += check-integrity.o diff --git a/fs/btrfs/hmzoned.c b/fs/btrfs/hmzoned.c new file mode 100644 index 000000000000..23bf58d3d7bb --- /dev/null +++ b/fs/btrfs/hmzoned.c @@ -0,0 +1,159 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 Western Digital Corporation or its affiliates. + * Authors: + * Naohiro Aota + * Damien Le Moal + */ + +#include +#include +#include "ctree.h" +#include "volumes.h" +#include "hmzoned.h" +#include "rcu-string.h" + +/* Maximum number of zones to report per blkdev_report_zones() call */ +#define BTRFS_REPORT_NR_ZONES 4096 + +static int btrfs_get_dev_zones(struct btrfs_device *device, u64 pos, + struct blk_zone *zones, + unsigned int *nr_zones, gfp_t gfp_mask) +{ + int ret; + + ret = blkdev_report_zones(device->bdev, pos >> SECTOR_SHIFT, + zones, nr_zones, gfp_mask); + if (ret != 0) { + btrfs_err_in_rcu(device->fs_info, + "get zone at %llu on %s failed %d", pos, + rcu_str_deref(device->name), ret); + return ret; + } + if (!*nr_zones) + return -EIO; + + return 0; +} + +int btrfs_get_dev_zone_info(struct btrfs_device *device) +{ + struct btrfs_zoned_device_info *zone_info = NULL; + struct block_device *bdev = device->bdev; + sector_t nr_sectors = bdev->bd_part->nr_sects; + sector_t sector = 0; + struct blk_zone *zones = NULL; + unsigned int i, nreported = 0, nr_zones; + unsigned int zone_sectors; + int ret; + + if (!bdev_is_zoned(bdev)) + return 0; + + zone_info = kzalloc(sizeof(*zone_info), GFP_KERNEL); + if (!zone_info) + return -ENOMEM; + + zone_sectors = bdev_zone_sectors(bdev); + ASSERT(is_power_of_2(zone_sectors)); + zone_info->zone_size = (u64)zone_sectors << SECTOR_SHIFT; + zone_info->zone_size_shift = ilog2(zone_info->zone_size); + zone_info->nr_zones = nr_sectors >> ilog2(bdev_zone_sectors(bdev)); + if (nr_sectors & (bdev_zone_sectors(bdev) - 1)) + zone_info->nr_zones++; + + zone_info->seq_zones = kcalloc(BITS_TO_LONGS(zone_info->nr_zones), + sizeof(*zone_info->seq_zones), + GFP_KERNEL); + if (!zone_info->seq_zones) { + ret = -ENOMEM; + goto out; + } + + zone_info->empty_zones = kcalloc(BITS_TO_LONGS(zone_info->nr_zones), + sizeof(*zone_info->empty_zones), + GFP_KERNEL); + if (!zone_info->empty_zones) { + ret = -ENOMEM; + goto out; + } + + + zones = kcalloc(BTRFS_REPORT_NR_ZONES, + sizeof(struct blk_zone), GFP_KERNEL); + if (!zones) + return -ENOMEM; + + /* Get zones type */ + while (sector < nr_sectors) { + nr_zones = BTRFS_REPORT_NR_ZONES; + ret = btrfs_get_dev_zones(device, sector << SECTOR_SHIFT, + zones, &nr_zones, GFP_KERNEL); + if (ret) + goto out; + + for (i = 0; i < nr_zones; i++) { + if (zones[i].type == BLK_ZONE_TYPE_SEQWRITE_REQ) + set_bit(nreported, zone_info->seq_zones); + if (zones[i].cond == BLK_ZONE_COND_EMPTY) + set_bit(nreported, zone_info->empty_zones); + nreported++; + } + sector = zones[nr_zones - 1].start + zones[nr_zones - 1].len; + } + + if (nreported != zone_info->nr_zones) { + btrfs_err_in_rcu(device->fs_info, + "inconsistent number of zones on %s (%u / %u)", + rcu_str_deref(device->name), nreported, + zone_info->nr_zones); + ret = -EIO; + goto out; + } + + device->zone_info = zone_info; + + btrfs_info_in_rcu( + device->fs_info, + "host-%s zoned block device %s, %u zones of %llu sectors", + bdev_zoned_model(bdev) == BLK_ZONED_HM ? "managed" : "aware", + rcu_str_deref(device->name), zone_info->nr_zones, + zone_info->zone_size >> SECTOR_SHIFT); + +out: + kfree(zones); + + if (ret) { + kfree(zone_info->seq_zones); + kfree(zone_info->empty_zones); + kfree(zone_info); + } + + return ret; +} + +void btrfs_destroy_dev_zone_info(struct btrfs_device *device) +{ + struct btrfs_zoned_device_info *zone_info = device->zone_info; + + if (!zone_info) + return; + + kfree(zone_info->seq_zones); + kfree(zone_info->empty_zones); + kfree(zone_info); + device->zone_info = NULL; +} + +int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, + struct blk_zone *zone, gfp_t gfp_mask) +{ + unsigned int nr_zones = 1; + int ret; + + ret = btrfs_get_dev_zones(device, pos, zone, &nr_zones, gfp_mask); + if (ret != 0 || !nr_zones) + return ret ? ret : -EIO; + + return 0; +} diff --git a/fs/btrfs/hmzoned.h b/fs/btrfs/hmzoned.h new file mode 100644 index 000000000000..ffc70842135e --- /dev/null +++ b/fs/btrfs/hmzoned.h @@ -0,0 +1,79 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2019 Western Digital Corporation or its affiliates. + * Authors: + * Naohiro Aota + * Damien Le Moal + */ + +#ifndef BTRFS_HMZONED_H +#define BTRFS_HMZONED_H + +struct btrfs_zoned_device_info { + /* + * Number of zones, zone size and types of zones if bdev is a + * zoned block device. + */ + u64 zone_size; + u8 zone_size_shift; + u32 nr_zones; + unsigned long *seq_zones; + unsigned long *empty_zones; +}; + +int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, + struct blk_zone *zone, gfp_t gfp_mask); +int btrfs_get_dev_zone_info(struct btrfs_device *device); +void btrfs_destroy_dev_zone_info(struct btrfs_device *device); + +static inline bool btrfs_dev_is_sequential(struct btrfs_device *device, u64 pos) +{ + struct btrfs_zoned_device_info *zone_info = device->zone_info; + + if (!zone_info) + return false; + + return test_bit(pos >> zone_info->zone_size_shift, + zone_info->seq_zones); +} + +static inline bool btrfs_dev_is_empty_zone(struct btrfs_device *device, u64 pos) +{ + struct btrfs_zoned_device_info *zone_info = device->zone_info; + + if (!zone_info) + return true; + + return test_bit(pos >> zone_info->zone_size_shift, + zone_info->empty_zones); +} + +static inline void btrfs_dev_set_empty_zone_bit(struct btrfs_device *device, + u64 pos, bool set) +{ + struct btrfs_zoned_device_info *zone_info = device->zone_info; + unsigned int zno; + + if (!zone_info) + return; + + zno = pos >> zone_info->zone_size_shift; + if (set) + set_bit(zno, zone_info->empty_zones); + else + clear_bit(zno, zone_info->empty_zones); +} + +static inline void btrfs_dev_set_zone_empty(struct btrfs_device *device, + u64 pos) +{ + btrfs_dev_set_empty_zone_bit(device, pos, true); +} + +static inline void btrfs_dev_clear_zone_empty(struct btrfs_device *device, + u64 pos) +{ + btrfs_dev_set_empty_zone_bit(device, pos, false); +} + +#endif diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index a447d3ec48d5..a8c550562057 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -29,6 +29,7 @@ #include "sysfs.h" #include "tree-checker.h" #include "space-info.h" +#include "hmzoned.h" const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES] = { [BTRFS_RAID_RAID10] = { @@ -342,6 +343,7 @@ void btrfs_free_device(struct btrfs_device *device) rcu_string_free(device->name); extent_io_tree_release(&device->alloc_state); bio_put(device->flush_bio); + btrfs_destroy_dev_zone_info(device); kfree(device); } @@ -847,6 +849,11 @@ static int btrfs_open_one_device(struct btrfs_fs_devices *fs_devices, clear_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state); device->mode = flags; + /* Get zone type information of zoned block devices */ + ret = btrfs_get_dev_zone_info(device); + if (ret != 0) + goto error_brelse; + fs_devices->open_devices++; if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state) && device->devid != BTRFS_DEV_REPLACE_DEVID) { @@ -2598,6 +2605,14 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path } rcu_assign_pointer(device->name, name); + device->fs_info = fs_info; + device->bdev = bdev; + + /* Get zone type information of zoned block devices */ + ret = btrfs_get_dev_zone_info(device); + if (ret) + goto error_free_device; + trans = btrfs_start_transaction(root, 0); if (IS_ERR(trans)) { ret = PTR_ERR(trans); @@ -2614,8 +2629,6 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path fs_info->sectorsize); device->disk_total_bytes = device->total_bytes; device->commit_total_bytes = device->total_bytes; - device->fs_info = fs_info; - device->bdev = bdev; set_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state); clear_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state); device->mode = FMODE_EXCL; @@ -2756,6 +2769,7 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path sb->s_flags |= SB_RDONLY; if (trans) btrfs_end_transaction(trans); + btrfs_destroy_dev_zone_info(device); error_free_device: btrfs_free_device(device); error: diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index 7f6aa1816409..5da1f354db93 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -57,6 +57,8 @@ struct btrfs_io_geometry { #define BTRFS_DEV_STATE_REPLACE_TGT (3) #define BTRFS_DEV_STATE_FLUSH_SENT (4) +struct btrfs_zoned_device_info; + struct btrfs_device { struct list_head dev_list; /* device_list_mutex */ struct list_head dev_alloc_list; /* chunk mutex */ @@ -77,6 +79,8 @@ struct btrfs_device { struct block_device *bdev; + struct btrfs_zoned_device_info *zone_info; + /* the mode sent to blkdev_get */ fmode_t mode;