wireguard-linux/fs/btrfs/sysfs.h, branch jd/unified-crypt-queue

btrfs: sysfs, rename device_link add/remove functions

2020-03-23T16:01:35Z

Since commit 668e48af7a94 ("btrfs: sysfs, add devid/dev_state kobject and device attributes"), the functions btrfs_sysfs_add_device_link() and btrfs_sysfs_rm_device_link() do more than just adding and removing the device link as its name indicated. Rename them to be more specific that's about the directory with the attirbutes Signed-off-by: Anand Jain Reviewed-by: David Sterba Signed-off-by: David Sterba

btrfs: sysfs, add devid/dev_state kobject and device attributes

2020-01-23T16:24:36Z

New sysfs attributes that track the filesystem status of devices, stored in the per-filesystem directory in /sys/fs/btrfs/FSID/devinfo . There's a directory for each device, with name corresponding to the numerical device id. in_fs_metadata - device is in the list of fs metadata missing - device is missing (no device node or block device) replace_target - device is target of replace writeable - writes from fs are allowed These attributes reflect the state of the device::dev_state and created at mount time. Sample output: $ pwd /sys/fs/btrfs/6e1961f1-5918-4ecc-a22f-948897b409f7/devinfo/1/ $ ls in_fs_metadata missing replace_target writeable $ cat missing 0 The output from these attributes are 0 or 1. 0 indicates unset and 1 indicates set. These attributes are readonly. It is observed that the device delete thread and sysfs read thread will not race because the delete thread calls sysfs kobject_put() which in turn waits for existing sysfs read to complete. Note for device replace devid swap: During the replace the target device temporarily assumes devid 0 before assigning the devid of the soruce device. In btrfs_dev_replace_finishing() we remove source sysfs devid using the function btrfs_sysfs_remove_devices_attr(), so after that call kobject_rename() to update the devid in the sysfs. This adds and calls btrfs_sysfs_update_devid() helper function to update the device id. Signed-off-by: Anand Jain Reviewed-by: David Sterba [ update changelog ] Signed-off-by: David Sterba

btrfs: sysfs, merge btrfs_sysfs_add devices_kobj and fsid

2020-01-20T15:40:50Z

Merge btrfs_sysfs_add_fsid() and btrfs_sysfs_add_devices_kobj() functions as these two are small and they are called one after the other. Signed-off-by: Anand Jain Reviewed-by: David Sterba Signed-off-by: David Sterba

btrfs: sysfs, btrfs_sysfs_add_fsid() drop unused argument parent

2020-01-20T15:40:49Z

Commit 24bd69cb ("Btrfs: sysfs: add support to add parent for fsid") added parent argument in preparation to show the seed fsid under the sprout fsid as in the patch [1] in the mailing list. [1] Btrfs: sysfs: support seed devices in the sysfs layout But later this idea was superseded by another idea to rename the fsid as in the commit f93c39970b1d ("btrfs: factor out sysfs code for updating sprout fsid"). So we don't need parent argument anymore. Signed-off-by: Anand Jain Reviewed-by: David Sterba Signed-off-by: David Sterba

btrfs: rename btrfs_block_group_cache

2019-11-18T16:51:51Z

The type name is misleading, a single entry is named 'cache' while this normally means a collection of objects. Rename that everywhere. Also the identifier was quite long, making function prototypes harder to format. Suggested-by: Nikolay Borisov Reviewed-by: Qu Wenruo Signed-off-by: David Sterba

btrfs: sysfs: move helper macros to sysfs.c

2019-09-09T12:59:08Z

None of the macros is used outside of sysfs.c. Signed-off-by: David Sterba

btrfs: sysfs: move type conversion helpers to sysfs.c

2019-09-09T12:59:08Z

Signed-off-by: David Sterba

btrfs: cleanup kobject.h includes

2019-09-09T12:59:07Z

The kobject should be pulled in via sysfs.h and that needs to include it because it needs various definitions like kobj_attribute or kobject. Signed-off-by: David Sterba

btrfs: factor out sysfs code for updating sprout fsid

2019-09-09T12:59:07Z

Wrap the fsid renaming code and move it to sysfs.c. Signed-off-by: David Sterba

btrfs: factor out sysfs code for deleting block group and space infos

2019-09-09T12:59:07Z

The helpers to create block group and space info directories already live in sysfs.c, move the deletion part there too. Signed-off-by: David Sterba