The idea was to introduce /dev/mapper to find for btrfs disk,
However I found first we need to congregate the disk scan
procedure at a function so it would help to consistently tune
it across the btrfs-progs. As of now both fi show and
dev scan use the disks scan they do it on their own.
So here it would congregate btrfs-disk scans at the function
scan_devs_for_btrfs, adds /dev/mapper to be used to scan
for btrfs, and updates its calling functions and few bug fixes.
v1->v2:
Rebased on top of David' integration branch origin/integration-20130524
patch 1 to 5 (below) are made independent of the idea to have the
/dev/mapper as one of the path to recognize the btrfs disks.
Which means they can be installed with out having anything
new. It just adds the framework/improves to integrated a
/dev/mapper path, which is only done in the patch 6.
So patch 1 to 5 are safe.
Also in v1 I suggested that we have -d option instead of
long option --all-devices which I have dropped that idea
here in v2.
Patch 6: adds a new option --mapper to the filesystem show
and device scan which inturn will use /dev/mapper to scan
for the btrfs.
Example output of using the --mapper option is as below..
btrfs filesystem show --mapper
Label: none uuid: 0a621111-ad84-4d80-842a-dd9c1c60bf51
Total devices 2 FS bytes used 1.17MB
devid 1 size 44.99GB used 2.04GB path /dev/mapper/mpathe
devid 2 size 48.23GB used 2.03GB path /dev/mapper/mpathd
Label: none uuid: bad9105f-bdc6-4626-9ba7-80bd97aebe19
Total devices 1 FS bytes used 28.00KB
devid 1 size 15.00GB used 2.04GB path /dev/mapper/mpathbp1
Btrfs v0.20-rc1-350-g7731651
btrfs device scan --mapper
-----
[1118885.473298] device fsid bad9105f-bdc6-4626-9ba7-80bd97aebe19 devid 1 transid 4 /dev/mapper/mpathbp1
[1118885.474077] device fsid 0a621111-ad84-4d80-842a-dd9c1c60bf51 devid 2 transid 103 /dev/mapper/mpathd
[1118885.474133] device fsid 0a621111-ad84-4d80-842a-dd9c1c60bf51 devid 1 transid 103 /dev/mapper/mpathe
-----
Anand Jain (6):
btrfs-progs: btrfs_scan_for_fsid doesn't need all the arguments
btrfs-progs: label option in btrfs filesystem show is not coded
btrfs-progs: update device scan usage
btrfs-progs: congregate dev scan
btrfs-progs: btrfs_scan_one_dir not to skip links when /dev/mapper is
provided
btrfs-progs: scan /dev/mapper in filesystem show and device scan
btrfs-find-root.c | 2 +-
cmds-device.c | 19 ++++++++++---------
cmds-filesystem.c | 16 ++++++++--------
disk-io.c | 2 +-
man/btrfs.8.in | 16 +++++++++-------
utils.c | 34 +++++++++++++++++++++++++++++-----
utils.h | 9 ++++++---
7 files changed, 64 insertions(+), 34 deletions(-)
--
1.8.1.227.g44fe835
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