Commit Graph

16 Commits

Author SHA1 Message Date
Anand Jain
38cfeef103 btrfs-progs: introduce a proper structure on which cli will call register-device ioctl
As of now commands mentioned below (with in [..]) are calling call register-device
ioctl BTRFS_IOC_SCAN_DEV for all the devices in the system.
Some issues with it:
 BTRFS_IOC_SCAN_DEV: ioctl is a write operation, we don't want command like
 btrfs-debug-tree threads to do that..
   eg:
   ----
   $ cat /proc/fs/btrfs/devlist  | egrep fsid | wc -l
   0
   $ btrfs-debug-tree /dev/sde  (num_device > 1)
   $ cat /proc/fs/btrfs/devlist  | egrep fsid | wc -l
   5
   ----

 btrfs_scan_fs_devices() ends up calling this ioctl only when num_device > 1.
 That's inconsistency with in feature/bug.

 We don't have to register _all_ the btrfs devices (again) in the system
 without user consent.

Why its inconsistent:
 function btrfs_scan_fs_devices() calls btrfs_scan_lblkid only when
 num_devices is > 1, which in turn calls BTRFS_IOC_SCAN_DEV ioctl, if
 conditions are met.

 But main issue is we have too many consumers of btrfs_scan_fs_devices()
 the names below with in [] is the cli leading to this function.

 open_ctree_broken()  [btrfs-find-root]
 recover_prepare()    [btrfs rescue super-recover]
 __open_ctree_fd
 (updates always except when flag OPEN_CTREE_RECOVER_SUPER is set and
 flag OPEN_CTREE_RECOVER_SUPER is set only by 'btrfs rescue super-
 recover' but still this thread sneaks through the open_ctree function
 to call register-device-ioctl as show below).
	open_ctree_fs_info
		[btrfs-debug-tree]
		[btrfs-image -r]
		[btrfs check]
		open_fs
			[btrfs restore]
		open_ctree
			[calc-size]
			[btrfs-corrupt-block]
			[btrfs-image] (create)
			[btrfs-map-logical]
			[btrfs-select-super]
			[btrfstune]
			[btrfs-zero-log]
			[tester]
			[mkfs]
			[quick-test.c]
			[btrfs label set unmounted]
			[btrfs get label unmounted]
			[btrfs rescue super-recover]

	open_ctree_fd
		[btrfs-convert]

Fix:
 In an effort to make register-device consistent, all calls to
 btrfs_scan_fs_devices() will have 5th parameter set to 0. that means
 we don't need 5th parameter at all. And with this function not calling
 the register ioctl at all, finally we will have following two cli to call
 the ioctl BTRFS_IOC_SCAN_DEV.
    btrfs dev scan and
    mkfs.btrfs
 Threads needing to update kernel about a device would have to use
 btrfs_register_one_device() separately.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
2014-10-16 12:02:00 +02:00
Gui Hecheng
f1672e50c7 btrfs-progs: use check_argc_* to check arg number for all tools
Since this patch:
	btrfs-progs: move the check_argc_* functions into utils.c

All tools including the independent tools(e.g. btrfs-image, btrfs-convert)
can share the convenience of the check_argc_* functions, so this patch
adopt the argc check functions globally.

Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
2014-08-22 15:07:02 +02:00
Qu Wenruo
23d7f6d9dc btrfs-progs: Allow btrfs_read_dev_super() to read all 3 super for super_recover.
Btrfs-progs superblock checksum check is somewhat too restricted for
super-recover, since current btrfs-progs will only read the 1st
superblock and if you need super-recover the 1st superblock is
possibly already damaged.

The fix is introducing super_recover parameter for
btrfs_read_dev_super() and callers to allow scan backup superblocks if
needed.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
2014-08-22 15:04:50 +02:00
Rakesh Pandit
ad17d56084 Btrfs-progs: make smatch checker happy (trivial fixes)
It complains errno never gets assigned to zero in find-root and since
errno anyway is zero at program started up, lets remove it.

Check "copy is less then zero" isn't possible because strtoull used by
arg_strtou64 wouldn't return -ve number.

Trivial space fixes.

Signed-off-by: Rakesh Pandit <rakesh@tuxera.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
2014-05-02 17:03:45 +02:00
Wang Shilong
aab2f48c18 Btrfs-progs: switch to arg_strtou64() part1
switch to arg_strtou64 plus some cleanups to remove unnecessary
codes.

Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
2014-03-21 06:23:19 -07:00
Ross Kirk
7ff512ce38 btrfs-progs: Make btrfs_header_chunk_tree_uuid() return unsigned long
Internally, btrfs_header_chunk_tree_uuid() calculates an unsigned
long, but casts it to a pointer, while all callers cast it to unsigned
long again.

From btrfs commit b308bc2f05a86e728bd035e21a4974acd05f4d1e

Signed-off-by: Ross Kirk <ross.kirk@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
2014-01-31 08:22:04 -08:00
Wang Shilong
77801d34d0 Btrfs-progs: pass flag to control whether run ioctl in btrfs_scan_for_fsid()
If some fatal superblocks are damaged, running ioctl will return failure,
in this case, we should avoid run ioctl.

Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-10-16 08:22:26 -04:00
Zach Brown
51c5811583 btrfs-print: define void function args
This silences (reasonable) sparse warnings of the form:

	warning: non-ANSI function declaration of ..

Signed-off-by: Zach Brown <zab@redhat.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-09-03 19:41:04 +02:00
Eric Sandeen
fa25b35dcc btrfs-progs: mark static & remove unused from non-kernel code
Mark many functions as static, and remove any resulting dead code.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-09-03 19:40:54 +02:00
Wang Shilong
44aa9dce55 Btrfs-progs: fix wrong arg sb_bytenr for btrfs_scan_fs_devices()
For most time, In open_ctree_*(), we use the first superblock
(BTRFS_SUPER_INFO_OFFSET). However, for btrfs-convert, we don't,
we should pass the correct sb_bytenr to btrfs_scan_fs_devices() rather
than always use BTRFS_SUPER_INFO_OFFSET.This patch fix the following
regression:

mkfs.ext2 <dev>
btrfs-convert <dev>

warning, device 1 is missing
Check tree block failed, want=2670592, have=0
read block failed check_tree_block
Couldn't read chunk root
Segmentation fault (core dumped)

Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-09 14:32:37 +02:00
Qu Wenruo
6c10240e4e btrfs-progs: Cleanup for using BTRFS_SETGET_STACK instead of raw convert
Some codes still use the cpu_to_lexx instead of the
BTRFS_SETGET_STACK_FUNCS declared in ctree.h.

Also added some BTRFS_SETGET_STACK_FUNCS for btrfs_header and
btrfs_super.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-09 14:32:32 +02:00
Chris Mason
f4ca892339 Add options to btrfs-find-root to control generation and level
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-07-05 12:12:35 -04:00
Miao Xie
615f286785 Btrfs-progs: cleanup similar code in open_ctree_* and close_ctree
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-07-03 14:06:54 -04:00
Miao Xie
d25aa23b02 Btrfs-progs: Don't free the devices when close the ctree
Some commands(such as btrfs-convert) access the devices again after we close
the ctree, so it is better that we don't free the devices objects when the ctree
is closed, or we need re-allocate the memory for the devices. We needn't worry
the memory leak problem, because all the memory will be freed after the taskes
die.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-07-03 14:06:54 -04:00
Miao Xie
0daa219ee1 Btrfs-progs: don't close the file descriptor 0 when closing a device
As we know, the file descriptor 0 is a special number, so we shouldn't
use it to initialize the file descriptor of the devices, or we might
close this special file descriptor by mistake when we close the devices.
"-1" is a better choice.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-07-03 14:06:54 -04:00
Eric Sandeen
b1031dfae1 btrfs-progs: standardize tool source filenames
For any btrfs-$FOO executable, rename the main source file from
$FOO.c to to btrfs-$FOO.c

This makes it slightly more obvious what's building what,
and allows us to write a default rule in the Makefile for
these tools.

(also add btrfs-calc-size to the list of objects to remove
on make clean)

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
2013-04-24 14:05:33 +02:00