From: Anand Jain <anand.jain@oracle.com>
To: linux-btrfs@vger.kernel.org
Cc: nborisov@suse.com
Subject: [PATCH v3 1/15] btrfs: add btrfs_sysfs_add_device helper
Date: Thu, 3 Sep 2020 18:46:50 +0800 [thread overview]
Message-ID: <30dc9402060e4361c15082fa52e1470746a2a04b.1599129529.git.anand.jain@oracle.com> (raw)
In-Reply-To: <cover.1599091832.git.anand.jain@oracle.com>
btrfs_sysfs_add_devices_dir() adds device link and devid kobject
(sysfs entries) for a device or all the devices in the btrfs_fs_devices.
In preparation to add these sysfs entries for the seed as well, add
a btrfs_sysfs_add_device() helper function and avoid code duplication.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
---
v3: Use device->fs_info instead of device->fs_devices->fs_info
essentially both points to the same addr, but former is more
efficient.
Fix whitespace, which didn't appear red in the git diff earlier,
strange.
fs/btrfs/sysfs.c | 79 ++++++++++++++++++++++++++++++++----------------
1 file changed, 53 insertions(+), 26 deletions(-)
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index 190e59152be5..5cfa13957e2a 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -1271,44 +1271,71 @@ static struct kobj_type devid_ktype = {
.release = btrfs_release_devid_kobj,
};
-int btrfs_sysfs_add_devices_dir(struct btrfs_fs_devices *fs_devices,
- struct btrfs_device *one_device)
+static int btrfs_sysfs_add_device(struct btrfs_device *device)
{
- int error = 0;
- struct btrfs_device *dev;
+ int ret;
unsigned int nofs_flag;
+ struct kobject *devices_kobj;
+ struct kobject *devinfo_kobj;
- nofs_flag = memalloc_nofs_save();
- list_for_each_entry(dev, &fs_devices->devices, dev_list) {
+ /*
+ * make sure we use the fs_info::fs_devices to fetch the kobjects
+ * even for the seed fs_devices
+ */
+ devices_kobj = device->fs_info->fs_devices->devices_kobj;
+ devinfo_kobj = device->fs_info->fs_devices->devinfo_kobj;
+ ASSERT(devices_kobj);
+ ASSERT(devinfo_kobj);
- if (one_device && one_device != dev)
- continue;
+ nofs_flag = memalloc_nofs_save();
- if (dev->bdev) {
- struct hd_struct *disk;
- struct kobject *disk_kobj;
+ if (device->bdev) {
+ struct hd_struct *disk;
+ struct kobject *disk_kobj;
- disk = dev->bdev->bd_part;
- disk_kobj = &part_to_dev(disk)->kobj;
+ disk = device->bdev->bd_part;
+ disk_kobj = &part_to_dev(disk)->kobj;
- error = sysfs_create_link(fs_devices->devices_kobj,
- disk_kobj, disk_kobj->name);
- if (error)
- break;
+ ret = sysfs_create_link(devices_kobj, disk_kobj,
+ disk_kobj->name);
+ if (ret) {
+ btrfs_warn(device->fs_info,
+ "sysfs create device link failed %d devid %llu",
+ ret, device->devid);
+ goto out;
}
+ }
- init_completion(&dev->kobj_unregister);
- error = kobject_init_and_add(&dev->devid_kobj, &devid_ktype,
- fs_devices->devinfo_kobj, "%llu",
- dev->devid);
- if (error) {
- kobject_put(&dev->devid_kobj);
- break;
- }
+ init_completion(&device->kobj_unregister);
+ ret = kobject_init_and_add(&device->devid_kobj, &devid_ktype,
+ devinfo_kobj, "%llu", device->devid);
+ if (ret) {
+ kobject_put(&device->devid_kobj);
+ btrfs_warn(device->fs_info,
+ "sysfs devinfo init failed %d devid %llu",
+ ret, device->devid);
}
+
+out:
memalloc_nofs_restore(nofs_flag);
+ return ret;
+}
- return error;
+int btrfs_sysfs_add_devices_dir(struct btrfs_fs_devices *fs_devices,
+ struct btrfs_device *one_device)
+{
+ int ret;
+
+ if (one_device)
+ return btrfs_sysfs_add_device(one_device);
+
+ list_for_each_entry(one_device, &fs_devices->devices, dev_list) {
+ ret = btrfs_sysfs_add_device(one_device);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
}
void btrfs_kobject_uevent(struct block_device *bdev, enum kobject_action action)
--
2.25.1
next prev parent reply other threads:[~2020-09-03 10:47 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-03 0:57 [PATCH v2 0/15] btrfs: seed fix null ptr, use only main device_list_mutex, and cleanups Anand Jain
2020-09-03 0:57 ` [PATCH 01/15] btrfs: add btrfs_sysfs_add_device helper Anand Jain
2020-09-03 8:40 ` Nikolay Borisov
2020-09-03 9:36 ` Anand Jain
2020-09-03 10:14 ` Anand Jain
2020-09-03 0:57 ` [PATCH 02/15] btrfs: add btrfs_sysfs_remove_device helper Anand Jain
2020-09-03 8:44 ` Nikolay Borisov
2020-09-03 10:03 ` Anand Jain
2020-09-03 10:09 ` Nikolay Borisov
2020-09-03 15:43 ` Josef Bacik
2020-09-03 0:57 ` [PATCH 03/15] btrfs: btrfs_sysfs_remove_devices_dir drop return value Anand Jain
2020-09-03 8:42 ` Nikolay Borisov
2020-09-03 15:44 ` Josef Bacik
2020-09-03 0:57 ` [PATCH 04/15] btrfs: refactor btrfs_sysfs_add_devices_dir Anand Jain
2020-09-03 8:45 ` Nikolay Borisov
2020-09-03 15:44 ` Josef Bacik
2020-09-03 0:57 ` [PATCH 05/15] btrfs: refactor btrfs_sysfs_remove_devices_dir Anand Jain
2020-09-03 8:47 ` Nikolay Borisov
2020-09-03 0:57 ` [PATCH 06/15] btrfs: initialize sysfs devid and device link for seed device Anand Jain
2020-09-03 9:06 ` Nikolay Borisov
2020-09-03 11:35 ` Anand Jain
2020-09-04 11:28 ` David Sterba
2020-09-03 0:57 ` [PATCH 07/15] btrfs: handle fail path for btrfs_sysfs_add_fs_devices Anand Jain
2020-09-03 9:13 ` Nikolay Borisov
2020-09-04 9:24 ` [PATCH v3 " Anand Jain
2020-09-03 0:57 ` [PATCH 08/15] btrfs: reada: use sprout device_list_mutex Anand Jain
2020-09-03 0:57 ` [PATCH 09/15] btrfs: btrfs_init_devices_late: " Anand Jain
2020-09-03 0:57 ` [PATCH 10/15] btrfs: open code list_head pointer in btrfs_init_dev_replace_tgtdev Anand Jain
2020-09-03 0:57 ` [PATCH 11/15] btrfs: cleanup btrfs_remove_chunk Anand Jain
2020-09-03 0:57 ` [PATCH 12/15] btrfs: cleanup btrfs_assign_next_active_device() Anand Jain
2020-09-03 0:57 ` [PATCH 13/15] btrfs: cleanup unnecessary goto in open_seed_device Anand Jain
2020-09-03 0:57 ` [PATCH 14/15] btrfs: btrfs_dev_replace_update_device_in_mapping_tree drop file global declare Anand Jain
2020-09-03 0:57 ` [PATCH 15/15] btrfs: fix replace of seed device Anand Jain
2020-09-03 10:46 ` Anand Jain [this message]
2020-09-03 15:42 ` [PATCH v3 1/15] btrfs: add btrfs_sysfs_add_device helper Josef Bacik
2020-09-03 11:35 ` [PATCH] fstests: btrfs/161: extend the test case to delete seed Anand Jain
2020-09-03 15:46 ` Josef Bacik
2020-09-04 9:13 ` [PATCH] btrfs: add a test case for btrfs seed device delete Anand Jain
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