From: Naohiro Aota <naohiro.aota@wdc.com>
To: linux-btrfs@vger.kernel.org, David Sterba <dsterba@suse.com>
Cc: Chris Mason <clm@fb.com>, Josef Bacik <josef@toxicpanda.com>,
Nikolay Borisov <nborisov@suse.com>,
Damien Le Moal <damien.lemoal@wdc.com>,
Johannes Thumshirn <Johannes.Thumshirn@wdc.com>,
Hannes Reinecke <hare@suse.com>,
Anand Jain <anand.jain@oracle.com>,
linux-fsdevel@vger.kernel.org,
Naohiro Aota <naohiro.aota@wdc.com>
Subject: [PATCH v2 07/21] btrfs: factor out gather_device_info()
Date: Wed, 12 Feb 2020 16:20:34 +0900 [thread overview]
Message-ID: <20200212072048.629856-8-naohiro.aota@wdc.com> (raw)
In-Reply-To: <20200212072048.629856-1-naohiro.aota@wdc.com>
Factor out gather_device_info() from __btrfs_alloc_chunk(). This function
iterates over devices list and gather information about devices. This
commit also introduces "max_avail" and "dev_extent_min" to fold the same
calculation to one variable.
This commit has no functional changes.
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
---
fs/btrfs/volumes.c | 119 +++++++++++++++++++++++++--------------------
1 file changed, 66 insertions(+), 53 deletions(-)
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 9181e3ab617d..2bd3ed830a28 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -4896,59 +4896,25 @@ static void init_alloc_chunk_ctl(struct btrfs_fs_devices *fs_devices,
}
}
-static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
- u64 start, u64 type)
+static int gather_device_info(struct btrfs_fs_devices *fs_devices,
+ struct alloc_chunk_ctl *ctl,
+ struct btrfs_device_info *devices_info)
{
- struct btrfs_fs_info *info = trans->fs_info;
- struct btrfs_fs_devices *fs_devices = info->fs_devices;
+ struct btrfs_fs_info *info = fs_devices->fs_info;
struct btrfs_device *device;
- struct map_lookup *map = NULL;
- struct extent_map_tree *em_tree;
- struct extent_map *em;
- struct btrfs_device_info *devices_info = NULL;
- struct alloc_chunk_ctl ctl;
u64 total_avail;
- int data_stripes; /* number of stripes that count for
- block group size */
+ u64 dev_extent_want = ctl->max_stripe_size * ctl->dev_stripes;
+ u64 dev_extent_min = BTRFS_STRIPE_LEN * ctl->dev_stripes;
int ret;
- int ndevs;
- int i;
- int j;
-
- if (!alloc_profile_is_valid(type, 0)) {
- ASSERT(0);
- return -EINVAL;
- }
-
- if (list_empty(&fs_devices->alloc_list)) {
- if (btrfs_test_opt(info, ENOSPC_DEBUG))
- btrfs_debug(info, "%s: no writable device", __func__);
- return -ENOSPC;
- }
-
- if (!(type & BTRFS_BLOCK_GROUP_TYPE_MASK)) {
- btrfs_err(info, "invalid chunk type 0x%llx requested", type);
- BUG();
- }
-
- ctl.start = start;
- ctl.type = type;
- init_alloc_chunk_ctl(fs_devices, &ctl);
-
- devices_info = kcalloc(fs_devices->rw_devices, sizeof(*devices_info),
- GFP_NOFS);
- if (!devices_info)
- return -ENOMEM;
+ int ndevs = 0;
+ u64 max_avail;
+ u64 dev_offset;
/*
* in the first pass through the devices list, we gather information
* about the available holes on each device.
*/
- ndevs = 0;
list_for_each_entry(device, &fs_devices->alloc_list, dev_alloc_list) {
- u64 max_avail;
- u64 dev_offset;
-
if (!test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state)) {
WARN(1, KERN_ERR
"BTRFS: read-only device in alloc_list\n");
@@ -4969,21 +4935,20 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
if (total_avail == 0)
continue;
- ret = find_free_dev_extent(
- device, ctl.max_stripe_size * ctl.dev_stripes,
- &dev_offset, &max_avail);
+ ret = find_free_dev_extent(device, dev_extent_want, &dev_offset,
+ &max_avail);
if (ret && ret != -ENOSPC)
- goto error;
+ return ret;
if (ret == 0)
- max_avail = ctl.max_stripe_size * ctl.dev_stripes;
+ max_avail = dev_extent_want;
- if (max_avail < BTRFS_STRIPE_LEN * ctl.dev_stripes) {
+ if (max_avail < dev_extent_min) {
if (btrfs_test_opt(info, ENOSPC_DEBUG))
btrfs_debug(info,
- "%s: devid %llu has no free space, have=%llu want=%u",
+ "%s: devid %llu has no free space, have=%llu want=%llu",
__func__, device->devid, max_avail,
- BTRFS_STRIPE_LEN * ctl.dev_stripes);
+ dev_extent_min);
continue;
}
@@ -4998,14 +4963,62 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
devices_info[ndevs].dev = device;
++ndevs;
}
- ctl.ndevs = ndevs;
+ ctl->ndevs = ndevs;
/*
* now sort the devices by hole size / available space
*/
- sort(devices_info, ctl.ndevs, sizeof(struct btrfs_device_info),
+ sort(devices_info, ndevs, sizeof(struct btrfs_device_info),
btrfs_cmp_device_info, NULL);
+ return 0;
+}
+
+static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
+ u64 start, u64 type)
+{
+ struct btrfs_fs_info *info = trans->fs_info;
+ struct btrfs_fs_devices *fs_devices = info->fs_devices;
+ struct map_lookup *map = NULL;
+ struct extent_map_tree *em_tree;
+ struct extent_map *em;
+ struct btrfs_device_info *devices_info = NULL;
+ struct alloc_chunk_ctl ctl;
+ int data_stripes; /* number of stripes that count for
+ block group size */
+ int ret;
+ int i;
+ int j;
+
+ if (!alloc_profile_is_valid(type, 0)) {
+ ASSERT(0);
+ return -EINVAL;
+ }
+
+ if (list_empty(&fs_devices->alloc_list)) {
+ if (btrfs_test_opt(info, ENOSPC_DEBUG))
+ btrfs_debug(info, "%s: no writable device", __func__);
+ return -ENOSPC;
+ }
+
+ if (!(type & BTRFS_BLOCK_GROUP_TYPE_MASK)) {
+ btrfs_err(info, "invalid chunk type 0x%llx requested", type);
+ BUG();
+ }
+
+ ctl.start = start;
+ ctl.type = type;
+ init_alloc_chunk_ctl(fs_devices, &ctl);
+
+ devices_info = kcalloc(fs_devices->rw_devices, sizeof(*devices_info),
+ GFP_NOFS);
+ if (!devices_info)
+ return -ENOMEM;
+
+ ret = gather_device_info(fs_devices, &ctl, devices_info);
+ if (ret < 0)
+ goto error;
+
/*
* Round down to number of usable stripes, devs_increment can be any
* number so we can't use round_down()
--
2.25.0
next prev parent reply other threads:[~2020-02-12 7:21 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-12 7:20 [PATCH v2 00/21] btrfs: refactor and generalize chunk/dev_extent/extent allocation Naohiro Aota
2020-02-12 7:20 ` [PATCH v2 01/21] btrfs: change type of full_search to bool Naohiro Aota
2020-02-12 7:20 ` [PATCH v2 02/21] btrfs: do not BUG_ON with invalid profile Naohiro Aota
2020-02-12 7:58 ` Johannes Thumshirn
2020-02-12 14:14 ` Josef Bacik
2020-02-12 7:20 ` [PATCH v2 03/21] btrfs: introduce chunk allocation policy Naohiro Aota
2020-02-12 7:20 ` [PATCH v2 04/21] btrfs: refactor find_free_dev_extent_start() Naohiro Aota
2020-02-12 14:16 ` Josef Bacik
2020-02-13 11:32 ` Johannes Thumshirn
2020-02-12 7:20 ` [PATCH v2 05/21] btrfs: introduce alloc_chunk_ctl Naohiro Aota
2020-02-12 8:00 ` Johannes Thumshirn
2020-02-13 16:17 ` Josef Bacik
2020-02-12 7:20 ` [PATCH v2 06/21] btrfs: factor out init_alloc_chunk_ctl Naohiro Aota
2020-02-13 16:20 ` Josef Bacik
2020-02-12 7:20 ` Naohiro Aota [this message]
2020-02-12 8:04 ` [PATCH v2 07/21] btrfs: factor out gather_device_info() Johannes Thumshirn
2020-02-12 7:20 ` [PATCH v2 08/21] btrfs: factor out decide_stripe_size() Naohiro Aota
2020-02-12 7:20 ` [PATCH v2 09/21] btrfs: factor out create_chunk() Naohiro Aota
2020-02-12 8:07 ` Johannes Thumshirn
2020-02-13 16:24 ` Josef Bacik
2020-02-20 10:17 ` Naohiro Aota
2020-02-12 7:20 ` [PATCH v2 10/21] btrfs: parameterize dev_extent_min Naohiro Aota
2020-02-13 16:27 ` Josef Bacik
2020-02-12 7:20 ` [PATCH v2 11/21] btrfs: introduce extent allocation policy Naohiro Aota
2020-02-13 19:55 ` Josef Bacik
2020-02-12 7:20 ` [PATCH v2 12/21] btrfs: move hint_byte into find_free_extent_ctl Naohiro Aota
2020-02-12 14:11 ` Johannes Thumshirn
2020-02-13 19:56 ` Josef Bacik
2020-02-12 7:20 ` [PATCH v2 13/21] btrfs: move vairalbes for clustered allocation " Naohiro Aota
2020-02-12 14:14 ` Johannes Thumshirn
2020-02-13 19:57 ` Josef Bacik
2020-02-20 14:27 ` Christoph Hellwig
2020-02-12 7:20 ` [PATCH v2 14/21] btrfs: factor out do_allocation() Naohiro Aota
2020-02-12 14:45 ` Johannes Thumshirn
2020-02-13 19:57 ` Josef Bacik
2020-02-12 7:20 ` [PATCH v2 15/21] btrfs: drop unnecessary arguments from clustered allocation functions Naohiro Aota
2020-02-12 14:47 ` Johannes Thumshirn
2020-02-13 19:58 ` Josef Bacik
2020-02-12 7:20 ` [PATCH v2 16/21] btrfs: factor out release_block_group() Naohiro Aota
2020-02-12 14:48 ` Johannes Thumshirn
2020-02-13 19:58 ` Josef Bacik
2020-02-12 7:20 ` [PATCH v2 17/21] btrfs: factor out found_extent() Naohiro Aota
2020-02-12 14:50 ` Johannes Thumshirn
2020-02-13 19:58 ` Josef Bacik
2020-02-12 7:20 ` [PATCH v2 18/21] btrfs: drop unnecessary arguments from find_free_extent_update_loop() Naohiro Aota
2020-02-12 14:51 ` Johannes Thumshirn
2020-02-13 19:58 ` Josef Bacik
2020-02-12 7:20 ` [PATCH v2 19/21] btrfs: factor out chunk_allocation_failed() Naohiro Aota
2020-02-12 14:56 ` Johannes Thumshirn
2020-02-13 19:52 ` Josef Bacik
2020-02-20 9:57 ` Naohiro Aota
2020-02-12 7:20 ` [PATCH v2 20/21] btrfs: skip LOOP_NO_EMPTY_SIZE if not clustered allocation Naohiro Aota
2020-02-13 19:55 ` Josef Bacik
2020-02-20 9:56 ` Naohiro Aota
2020-02-20 15:40 ` Josef Bacik
2020-02-12 7:20 ` [PATCH v2 21/21] btrfs: factor out prepare_allocation() Naohiro Aota
2020-02-13 19:59 ` Josef Bacik
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