When we compile btrfs-progs in RHEL5(with default gcc 4.1.2 and glibc-2.5-18),
we can get following error:
cc1: warnings being treated as errors
btrfs-list.c: In function 'ino_resolve':
btrfs-list.c:511: warning: implicit declaration of function 'strndup'
btrfs-list.c:511: warning: incompatible implicit declaration of built-in function 'strndup'
make: *** [btrfs-list.o] Error 1
...
cc1: warnings being treated as errors
btrfs.c: In function 'split_command':
btrfs.c:168: warning: implicit declaration of function 'strndup'
btrfs.c:168: warning: incompatible implicit declaration of built-in function 'strndup'
make: *** [btrfs-list.o] Error 1
We can add _GNU_SOURCE definition according man strndup.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Adding a mounted device is dangerous because it will destroy the filesystem
on that mounted device. So we add mounted-checking for btrfs-vol.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Otherwise we print FIRST_CHUNK_TREE for any objectid 256, which e.g. for
the root tree is the first snap/subvol.
Signed-off-by: Sage Weil <sage@newdream.net>
For now, btrfsctl does not check whether subvolume name contains slash
or not. If someone specify subvolume with trailing slash (in case
using shell completion), ioctl returns with EINVAL and this error
may confuse some careless users like me. So, this patch adds check
slashes in subvolume name in deletion same as snapshot/subvolume
creating. But considering shell completion, this fix allows trailing
slash.
Signed-off-by: TARUISI Hiroaki <taruishi.hiroak@jp.fujitsu.com>
compiling btrfs-progs from current git I get an error in btrfsck.c about
undefined references. The attached patch adds an include for sys/stat.h
which fixes the problem for me.
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
As recently discussed on the list, btrfsck should only be run on
unmounted filesystems. This patch adds a short check for the mount
status at the beginning of btrfsck. If the FS is mounted, the
program aborts showing an error message.
Signed-off-by: Andi Drebes <lists-receive@programmierforen.de>
Check_mount() should also work with multi device filesystems.
This patch adds checks that allow to detect if a file is a device
file used by a mounted single or multi device btrfs or if it is a
regular file used by a loopback device that is part of a mounted
single or multi device btrfs.
The single device checks also work for non-btrfs filesystems.
This might be helpful to prevent users from running btrfs programs
(e.g. mkfs.btrfs) accidentally on a filesystem used somewhere else.
Signed-off-by: Andi Drebes <lists-receive@programmierforen.de>
btrfs-subvol find-new <subvol> <id> will search through a given subvol
and print out all the files with extents newer than a given id.
Care must be taken to make sure any pending delalloc is on disk before
running this because that won't show up in the output.
This goes along with the new space info ioctl. This will spit out the space
info all nice and pretty with the type, it's flags (DUP, RAID) and how much
space is in that group and how much is in use.
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit introduces a new command called 'btrfs' for managing
a btrfs filesystem. 'btrfs' handles:
- snapshot/subvolume creation
- adding/removal of volume (ie: disk)
- defragment of a tree
- scan of a device searching a btrfs filesystem
- re-balancing of the chunk on the disks
- listing subvolumes and snapshots
This has also been updated to include the new defrag range ioctl.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This introduces a new btrfsctl option, -m, to allow you to set the default'ly
mounted subvolume. You can do
btrfsctl -m /your/subvolume
and that will make that subvolume the subvolume that is mounted by default, or
you can do
btrfsctl -m <treeid> /any/subvolume
and this will make the subvolume with tree id <treeid> the default'ly mounted
subvolume. You can get the treeid by using the listing option. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This allows us to figure out which physical byte offset on which device
is the real location for a given logical block number. It can
optionally read the block in and save it to a file for debugging
analysis.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This patch adds semantic checks for links to snapshot/subvolume and
root back/forward references.
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
remove code that updates the total used space, since
btrfs_update_block_group does that work now.
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
lookup_inline_extent_backref only checks for duplicate backref for data extent.
It assumes backrefs for tree block never conflict. This patch makes
lookup_inline_extent_backref check duplicate backrefs for both data and tree
block, so that we can detect potential bug earlier.
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Write dirty block groups may make some block groups dirty.
This patch make btrfs_write_dirty_block_groups properly
handle the recursion.
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit introduces a new kind of back reference for btrfs metadata.
Once a filesystem has been mounted with this commit, IT WILL NO LONGER
BE MOUNTABLE BY OLDER KERNELS.
The new back ref provides information about pointer's key, level and in which
tree the pointer lives. This information allow us to find the pointer by
searching the tree. The shortcoming of the new back ref is that it only works
for pointers in tree blocks referenced by their owner trees.
This is mostly a problem for snapshots, where resolving one of these fuzzy back
references would be O(number_of_snapshots) and quite slow. The solution used
here is to use the fuzzy back references in the common case where a given tree
block is only referenced by one root, and use the full back references when
multiple roots have a reference
There are still some warnings of the form:
format '%llu' expects type 'long long unsigned int' but argument has type 'u64'
In conjunction with -Werror, this is causing some build failures.
Now they're properly casted, avoiding compiler warnings.
Signed-off-by: Luca Bruno <lucab@debian.org>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
output objectid in btrfs_disk_key with human readable strings.
Other updates are included for more readable output.
Thanks Fengguang's fix to this patch.
Signed-off-by: Shen Feng <shen@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
mkfs.btrfs now prints its version when invoked with -V|--version
and exits without error.
All other mkfs.* tools provide this feature and follow this
implicit argument naming convention, as it is commonly used to
check for helper tools presence.
The corrisponding manual already mentions this option, no need to
touch it.
Signed-off-by: Luca Bruno <lucab@debian.org>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Kept the name with the name in, so that further processing such as
BUILD_DATE BUILD_VERSION etc. could be included later.
All man pages included in the man directory to avoid file cluttering.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.de>
