Re: [PATCH not for integration] btrfs-devlist: dumps btrfs_device and btrfs_fs_devices from kernel

[Anand Jain <Anand.Jain@oracle.com>]

On 26/07/2014 15:05, Goffredo Baroncelli wrote:
> On 07/25/2014 02:33 PM, Anand Jain wrote:
>> This would dump the following info:
>>
>> fs_address dev_address dev_root_addr root_fsid
>> fsid name uuid (seed_fsid@seed_addr sprout_fsid@sprout_addr)
>> 	(fs_num_devices fs_open_devices fs_rw_devices fs_missing_devices fs_total_devices) fs_total_rw_bytes fs_num_can_discard
>> 	devid gen total_bytes disk_total_bytes bytes_used type io_align io_width sector_size fmode
>> 	not_fs_Mounted|not_fs_Seeding|not_fs_Rotating
>> 	not_Writable|not_MD|not_Missing|not_Discard|not_Replace_tgt|not_Run_pending|not_Nobarriers|not_Stat_valid|not_Bdev
>>
>> Applies on Chris integration branch now
>
> Hi Anand,
>
> why not export these information via sysfs ?


Thanks for the comments.

  If its for the purpose of recreating the kernel
  LIST_HEAD(fs_uuids) in the user-space, what would you
  choose ? sysfs / ioctl / memory-dump / any-other better way ?

Regds, Anand



> BR
> G.Baroncelli
>
>>
>> Anand Jain (1):
>>    btrfs: introduce BTRFS_IOC_GET_DEVS
>>
>>   fs/btrfs/super.c           |  86 +++++++++++++++++++++++++++
>>   fs/btrfs/volumes.c         | 145 +++++++++++++++++++++++++++++++++++++++++++++
>>   fs/btrfs/volumes.h         |   3 +
>>   include/uapi/linux/btrfs.h |  53 ++++++++++++++++-
>>   4 files changed, 286 insertions(+), 1 deletion(-)
>>
>> Anand Jain (1):
>>    btrfs-progs: introduce btrfs-devlist
>>
>>   .gitignore      |   1 +
>>   Makefile        |   4 +-
>>   btrfs-devlist.c | 268 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>>   ioctl.h         |  52 +++++++++++
>>   4 files changed, 323 insertions(+), 2 deletions(-)
>>   create mode 100644 btrfs-devlist.c
>>
>
>