Unless the top level is mounted there is no way to know the
details of all the subvolume. For example:
mount -o subvol=sv1/newsv1 /dev/sdb /btrfs
btrfs su list /btrfs
ID 257 gen 12 top level 5 path sv1
ID 258 gen 9 top level 257 path sv1/snap
ID 259 gen 11 top level 257 path sv1/newsv1
You can't subvol show for sv1 and sv1/snap as its paths aren't
accessible to the user unless the its top level is mounted.
This patch adds two new options to the existing btrfs subvol show
cli. They are --rootid/-r or --uuid/-u, with this now the user will
be able to look for a subvolume using the rootid OR the uuid.
./btrfs su show -r 257 /btrfs
sv1
Name: sv1
UUID: 30129358-c69d-3e4a-a662-29509cc69c95
Parent UUID: -
Received UUID: -
Creation time: 2017-07-11 20:32:57 +0800
Subvolume ID: 257
Generation: 12
Gen at creation: 7
Parent ID: 5
Top level ID: 5
Flags: -
Snapshot(s):
sv1/snap
Signed-off-by: Anand Jain <anand.jain@oracle.com>
[ minor adjustments in the help text ]
Signed-off-by: David Sterba <dsterba@suse.com>
There are not performance critical static inlines, we can do the normal
declaration/definition split for various helpers.
Signed-off-by: David Sterba <dsterba@suse.com>
Large numbers like (1024 * 1024 * 1024) may cost reader/reviewer to
waste one second to convert to 1G.
Introduce kernel include/linux/sizes.h to replace any intermediate
number larger than 4096 (not including 4096) to SZ_*.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The regulare mkfs_btrfs does not anything special about convert and just
passes the arguments. Make that two functions.
Signed-off-by: David Sterba <dsterba@suse.com>
Add a unit mode that will interpret the input number as a signed 64bit,
optionally and not by default for all numbers.
Signed-off-by: David Sterba <dsterba@suse.com>
I got tired of seeing "16.00EiB" whenever btrfs-progs encounters a
negative size value, e.g. during resize:
Unallocated:
/dev/mapper/datamd18 16.00EiB
This version is much more useful:
Unallocated:
/dev/mapper/datamd18 -26.29GiB
Signed-off-by: Zygo Blaxell <ce3g8jdj@umail.furryterror.org>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
It seems like bad idea to use a library name (lblkid) within generic
function name. The currently used scanning library is implementation
detail and this detail should be hidden for rest of the code.
Signed-off-by: Karel Zak <kzak@redhat.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Add options to show file and line or stack trace for error/warning
messages that use the common helpers. Possible to let any error stop
execution for ease of analysis and debugging.
Signed-off-by: David Sterba <dsterba@suse.com>
The message about discard is printed unconditionally and does not
conform to the --quite option eg. in mkfs. Consolidate the operation
flags into one argument and add support for verbosity.
Signed-off-by: David Sterba <dsterba@suse.com>
Introduce new function make_convert_btrfs() for convert.
This new function will have the following features:
1) Allocate temporary sb/metadata/system chunk, avoiding old used data
2) More structured functions
No more over 1000 lines function, better function split and code
reuse
This will finally replace current make_btrfs(), but now only used for
convert.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We know nodesize should not overflow with the shift, but le'ts make the
code correct if the resulting type can store the full value.
Resolves-coverity-id: 1358120
Signed-off-by: David Sterba <dsterba@suse.com>
David has reported some quite chaos usage of pseudo random numbers.
Like using static srand seed, or even calling rand() without setting
seed correctly.
The new pseudo random API will initialize the random seed on its first
calling and use uniformly distributed pseudo random number generator as
backend.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
[ renamed variables and functions, added prefixes ]
Signed-off-by: David Sterba <dsterba@suse.com>
The other get_device_info() is in the same file, 4 lines above.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Nodesize is used in kernel, the values are always equal. We have to keep
leafsize in headers, similarly the tree setting functions still take and
set leafsize, but it's effectively a no-op.
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Anand Jain <anand.jain@oracle.com>
[ renamed from subvol_minus_mnt to subvol_strip_mountpoint ]
Signed-off-by: David Sterba <dsterba@suse.com>
get_subvol_info() is useful as we are adding more features around
subvolume. This function was inline with the function
cmd_subvol_show().
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
kerncompat.h header file is part of libbtrfs API. min/max macros cause
conflict while building projects dependant on libbtrfs. Moving those
macros to btrfs-progs internal header file fixes the conflict.
Signed-off-by: Ondrej Kozina <okozina@redhat.com>
Signed-off-by: David Sterba <dsterba@suse.com>
All commands should support the "--" option separator. This is
transparently handled by getopt, but we don't use that everywhere.
Introduce a helper for commands that take no options (just the path).
The object file dependencies need to be adjusted a bit.
Signed-off-by: David Sterba <dsterba@suse.com>
Introduce 3 new members for btrfs_convert_context:
1) struct cache_tree used
Records accurate byte ranges which are used by old filesystem.
This will be used to create old filesystem image.
2) struct cache_tree data_chunks
Records batched ranges which must be covered by data chunks.
The bytenr range is optimized to meet all the chunk requirement.
3) u64 total_bytenr
Records how large the filesystem is in bytenr.
Yes, we can calculate it easy, but that's for old blocks based
filesystem.
This will make it more friendly for extent based filesystem.
And later cctx->block_counts and may be removed
And 2 for mkfs_config:
1) char *chunk_uuid.
Used as temporary chunk_uuid (unparsed) string for later
make_convert_btrfs()
2) u64 super_bytenr
Records the new temporary super bytenr after make_btrfs().
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
When creating small Btrfs filesystem instances (i.e. filesystem size <= 1GiB),
mkfs.btrfs fails if both sectorsize and nodesize are specified on the command
line and sectorsize != nodesize, since mixed block groups involves both data
and metadata blocks sharing the same block group. This is an incorrect behavior
when '-M' option isn't specified on the command line.
This commit makes optional the creation of mixed block groups i.e. Mixed block
groups are created only when -M option is specified on the command line.
Since we now allow small filesystem instances with sectorsize != nodesize to
be created, we can end up in the following situation,
[root@localhost ~]# mkfs.btrfs -f -n 65536 /dev/loop0
btrfs-progs v3.19-rc2-405-g976307c
See http://btrfs.wiki.kernel.org for more information.
Performing full device TRIM (512.00MiB) ...
Label: (null)
UUID: 49fab72e-0c8b-466b-a3ca-d1bfe56475f0
Node size: 65536
Sector size: 4096
Filesystem size: 512.00MiB
Block group profiles:
Data: single 8.00MiB
Metadata: DUP 40.00MiB
System: DUP 12.00MiB
SSD detected: no
Incompat features: extref, skinny-metadata
Number of devices: 1
Devices:
ID SIZE PATH
1 512.00MiB /dev/loop0
[root@localhost ~]# mount /dev/loop0 /mnt/
mount: mount /dev/loop0 on /mnt failed: No space left on device
The ENOSPC occurs during the creation of the UUID tree. This is because of
things like large metadata block size, DUP mode used for metadata and global
reservation consuming space. Also, large nodesize does not make sense on small
filesystems, hence this should not be an issue.
Signed-off-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Use btrfs_open_dir() in open_path_or_dev_mnt() to make the function
return error when target is neither block device nor btrfs mount point.
Also add "verbose" argument to let function output common error
message instead of putting duplicated lines in caller.
Before patch:
# ./btrfs device stats /mnt/tmp1
ERROR: getting dev info for devstats failed: Inappropriate ioctl for device
# ./btrfs replace start /dev/vdd /dev/vde /mnt/tmp1
ERROR: ioctl(DEV_REPLACE_STATUS) failed on "/mnt/tmp1": Inappropriate ioctl for device
After patch:
# ./btrfs device stats /mnt/tmp1
ERROR: not a btrfs filesystem: /mnt/tmp1
# ./btrfs replace start /dev/vdd /dev/vde /mnt/tmp1
ERROR: not a btrfs filesystem: /mnt/tmp1
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Current code use fprintf(stderr, "...") to output warnning and
error information.
The error message have different style, as:
# grep fprintf *.c
fprintf(stderr, "Open ctree failed\n");
fprintf(stderr, "%s: open ctree failed\n", __func__);
fprintf(stderr, "ERROR: cannot open ctree\n");
...
And sometimes, we forgot add tailed '\n', or use printf instead,
as in current code:
printf("warning, device %llu is missing\n",
This patch introduce warning() and error() as common function,
to make:
1: Each warning and error information have same format
2: Easy to search/change all error message
3: Easy to modify function's internal for debug or other requirement,
for example:
print function/linenumber in error()
dumpstack in error()
add some trace for some style of message
add support for -v, -vv, ...
support for locales
custom output functions
support some special device/tty
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
[print newline after the message]
Signed-off-by: David Sterba <dsterba@suse.com>
Check nodesize against features, not only sectorsize.
In fact, one of the btrfs-convert and mkfs differs in the nodesize
check.
This patch also provides the basis for later btrfs-convert fix.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Old kernels before 3.9 do not provide ioctl BTRFS_IOC_GET_FSLABEL.
So we need to provide a fail safe logic for btrfs-progs running
on those kernel.
In this patch when get_label_mounted() fails on the old kernel
it will fail back to the old method and uses get_label_unmounted(),
where it will read from the disk directly.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
