From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf1-f177.google.com ([209.85.210.177]:34879 "EHLO mail-pf1-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726882AbeHIUhW (ORCPT ); Thu, 9 Aug 2018 16:37:22 -0400 From: Naohiro Aota To: David Sterba , linux-btrfs@vger.kernel.org Cc: Chris Mason , Josef Bacik , linux-kernel@vger.kernel.org, Hannes Reinecke , Damien Le Moal , Bart Van Assche , Matias Bjorling , Naohiro Aota Subject: [RFC PATCH 05/12] btrfs-progs: load and check zone information Date: Fri, 10 Aug 2018 03:10:58 +0900 Message-Id: <20180809181105.12856-5-naota@elisp.net> In-Reply-To: <20180809181105.12856-1-naota@elisp.net> References: <20180809180450.5091-1-naota@elisp.net> <20180809181105.12856-1-naota@elisp.net> Sender: linux-btrfs-owner@vger.kernel.org List-ID: This patch checks if a device added to btrfs is a zoned block device. If it is, load zones information and the zone size for the device. For a btrfs volume composed of multiple zoned block devices, all devices must have the same zone size. Signed-off-by: Naohiro Aota --- utils.c | 10 ++++++++++ volumes.c | 18 ++++++++++++++++++ volumes.h | 3 +++ 3 files changed, 31 insertions(+) diff --git a/utils.c b/utils.c index 71fc044a..a2172a82 100644 --- a/utils.c +++ b/utils.c @@ -250,6 +250,16 @@ int btrfs_add_to_fsid(struct btrfs_trans_handle *trans, goto out; } + ret = btrfs_get_zone_info(fd, path, fs_info->fs_devices->hmzoned, + &device->zinfo); + if (ret) + goto out; + if (device->zinfo.zone_size != fs_info->fs_devices->zone_size) { + error("Device zone size differ\n"); + ret = -EINVAL; + goto out; + } + disk_super = (struct btrfs_super_block *)buf; dev_item = &disk_super->dev_item; diff --git a/volumes.c b/volumes.c index d81b348e..2ec27cd7 100644 --- a/volumes.c +++ b/volumes.c @@ -160,6 +160,8 @@ static int device_list_add(const char *path, struct btrfs_device *device; struct btrfs_fs_devices *fs_devices; u64 found_transid = btrfs_super_generation(disk_super); + int hmzoned = btrfs_super_incompat_flags(disk_super) & + BTRFS_FEATURE_INCOMPAT_HMZONED; fs_devices = find_fsid(disk_super->fsid); if (!fs_devices) { @@ -237,6 +239,8 @@ static int device_list_add(const char *path, if (fs_devices->lowest_devid > devid) { fs_devices->lowest_devid = devid; } + if (hmzoned) + fs_devices->hmzoned = 1; *fs_devices_ret = fs_devices; return 0; } @@ -307,6 +311,8 @@ int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, int flags) struct btrfs_device *device; int ret; + fs_devices->zone_size = 0; + list_for_each_entry(device, &fs_devices->devices, dev_list) { if (!device->name) { printk("no name for device %llu, skip it now\n", device->devid); @@ -330,6 +336,18 @@ int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, int flags) device->fd = fd; if (flags & O_RDWR) device->writeable = 1; + + ret = btrfs_get_zone_info(fd, device->name, fs_devices->hmzoned, + &device->zinfo); + if (ret != 0) + goto fail; + if (!fs_devices->zone_size) { + fs_devices->zone_size = device->zinfo.zone_size; + } else if (device->zinfo.zone_size != fs_devices->zone_size) { + fprintf(stderr, "Device zone size differ\n"); + ret = -EINVAL; + goto fail; + } } return 0; fail: diff --git a/volumes.h b/volumes.h index bad688e5..36a6f44b 100644 --- a/volumes.h +++ b/volumes.h @@ -111,6 +111,9 @@ struct btrfs_fs_devices { int seeding; struct btrfs_fs_devices *seed; + + u64 zone_size; + unsigned int hmzoned:1; }; struct btrfs_bio_stripe { -- 2.18.0