glibc 2.10+ (5+ years old) enables all the desired features:
_XOPEN_SOURCE 700, __XOPEN2K8, POSIX_C_SOURCE, DEFAULT_SOURCE; with a
single _GNU_SOURCE define in the makefile alone. For portability to
other libc implementations (e.g. dietlibc) _XOPEN_SOURCE=700 is also
defined.
This also resolves Debian bug report filed by Michael Tautschnig -
"Inconsistent use of _XOPEN_SOURCE results in conflicting
declarations". Whilst I was not able to reproduce the results, the
reported fact is that _XOPEN_SOURCE set to 500 in one set of files
(e.g. cmds-filesystem.c) generates/defines different struct stat from
other files (cmds-replace.c).
This patch thus cleans up all feature defines, and sets them at a
consistent level.
Bug-Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=747969
Signed-off-by: Dimitri John Ledkov <dimitri.j.ledkov@intel.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
These were added to deal with duplicated functionality within btrfs-progs, but
we specifically copied rbtree.c from the kernel, so move these functions out
into their own file. This will make it easier to keep rbtree.c in sync. Thanks,
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
When using send/receive, it it useful to be able to match up source
subvols on the send side (as, say, for -p or -c clone sources) with their
corresponding copies on the receive side. This patch adds a -R option to
btrfs sub list to show the received subvolume UUID on the receive side,
allowing the user to perform that matching correctly.
Signed-off-by: Hugo Mills <hugo@carfax.org.uk>
Signed-off-by: David Sterba <dsterba@suse.cz>
The real check whether to show deleted or live subvolumes was skipped if
just '-d' was specified without other filters. The 'deleted' filter was
not accounted.
It is now handled as a normal filter, that additionally sets the only_delete
global status in order to be processed before any other filters in
filter_root().
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
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>
Steps to reproduce:
# mkfs.btrfs -f /dev/sda8
# mount /dev/sda8 /mnt
# mkdir /mnt/subvolumes
# btrfs sub create /mnt/subvolumes/subv1
# btrfs sub create /mnt/subvolumes/subv1/subv1.1
# btrfs sub list -o /mnt/subvolumes/subv1 <----we did not list anything
The problem is that we don't set @top_id right, fix it.
Reported-by: Alex <alex@bpmit.com>
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>
free(3) already checks the pointer for NULL, no need to do it
on your own. This patch make the change globally.
Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
we use 37 as the allocation size to hold the uuid_unparse, here
it defines BTRFS_UUID_UNPARSE_SIZE for the same.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
New option to subvolume list that acts as a global filter and applies
the other filters to either live subvolumes or the uncleaned ones.
The path to the deleted subvolumes is lost at the deletion time, sample
output looks like:
ID 259 gen 7 top level 0 path <FS_TREE>/DELETED
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
The current code returns from the function when the call to ioctl
fails. This may leak cache_dir_name and cache_full_name. Fix it.
Signed-off-by: chandan <chandan@linux.vnet.ibm.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Signed-off-by: "Chris West (Faux)" <git@goeswhere.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
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>
__CHECKER__ is only for the type juggling used to tell sparse which
types need conversion between address spaces. It is not OK to use to
change the code that gets checked to avoid bugs elsewhere in the build
infrastructure. We want to check the code that builds when the checker
isn't enabled.
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>
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>
localtime may return NULL (when an error is detected eg. after setting
tzname), followed by a segfault when the values is about to be used.
localtime_r works, does not set tzname and does not return NULL.
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
The root_item->otime value must be accessed via the macro otherwise the
value is incorrect on big endian machines.
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
In fact, the code of many rb-tree insert/search/delete functions is similar,
so we can abstract them, and implement common functions for rb-tree, and then
simplify them.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
See the warnings below:
[CC] btrfs-list.o
btrfs-list.c: In function 'filter_by_parent':
btrfs-list.c:1183:34: warning: cast to pointer from integer of different size
[-Wint-to-pointer-cast]
[CC] cmds-subvolume.o
cmds-subvolume.c: In function 'cmd_subvol_show':
cmds-subvolume.c:917:5: warning: cast from pointer to integer of different size
[-Wpointer-to-int-cast]
[CC] cmds-restore.o
cmds-restore.c: In function 'decompress_lzo':
cmds-restore.c:116:10: warning: passing argument 4 of 'lzo1x_decompress_safe'
from incompatible pointer type [enabled by default]
In file included from cmds-restore.c:31:0:
/usr/include/lzo/lzo1x.h:77:1: note: expected 'lzo_uint *' but argument is of
type 'size_t *'
Reported-by: Russell Coker <russell@coker.com.au>
Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
btrfs_list_get_path_rootid() tries to return a negative
number on error, but it's a u64 function. Callers which test
for a return < 0 will never see an error.
Change the function to fill in the rootid via a pointer,
and then return a simple int as error.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
in btrfs_get_subvol(), there is a cut and paste error:
if (ri->full_path)
the_ri->full_path = strdup(ri->full_path);
else
the_ri->name = NULL;
It should be setting the_ri->full_path to NULL here.
Do it in a function instead of the cpoy & paste to avoid future
errors.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
btrfs snapshot list command will stop by the deleted subvolumes.
The problem may happen by two ways:
1. a subvolume deletion is not commited, that is ROOT_BACKREF has been deleted,
but ROOT_ITEM still exists. The command will fail to fill the path of
the deleted subvolumes because we can not get the parent fs/file tree.
2. a subvolume is possibly deleted when we fill the path, For example,
Fs tree
|->subv0
|->subv1
We may fill the path of subv1 firstly, after that, some user deletes subv1
and subv0, and then we fill the path of subv0. The command will fail to
fill the path of subv0 because we can not get path of subv0. And the command
also will fail to make the full path of subv1 because we don't have the path
of subv0.
Since these subvolumes have been deleted, we should filter them. This patch
fixed the above problem by this way.
For the 1st case, ->ref_tree of the deleted subvolumes are 0.
For the 2nd case, if we found the error number that ioctl() returns is ENOENT,
we will set ->ref_tree to 0.
And when we make the full path of the subvolumes, we will check ->ref_tree of
them and their parent. If someone's ->ref_tree or its parent's ->ref_tree is 0,
we will filter it.
Reported-by: Stefan Priebe <s.priebe@profihost.ag>
Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Signed-off-by: Anand Jain <anand.jain@oracle.com>
This adds show sub-command to the btrfs subvol cli
to display detailed inforamtion of the given subvol
or snapshot.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Currently you can print subvol in a list or table format.
This patch will provide a way to extend this to other formats
like the upcoming raw format.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
We need a function which can get the root_info of a given
subvol. This is in preparation to add support for the show
sub-cli.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
As we would add more ways to list and manage the subvols
and snapshots, its better if we have struct root_info
defined in the header file.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
To improve the code reuse its better to have btrfs_list_subvols
just return list of subvols witout printing
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Commit a1e89891eb changed subvolume list
command so that we list only subvolumes under the specified directory.
However this is confusing and unnecessary obstacle, because one usually
want to see all subvolumes in the file system. It was introduced with
the notion the full_path may be invalid which is not exactly true as the
full_path is always relative to the root subvolume which makes perfect
sense.
Simply making option '-a' default is not enough since it introduces the
relative/absolute path distinction effectively obfuscating the subvolume
nesting.
This commit returns the subvolume list command behaviour before commit
a1e89891eb where we list all subvolumes in
the filesystem with path naming from root subovolume. IMO this is the
best default as it is well understood and gives all the important
information about file system subvolumes including subvolume nesting
without the need to parse additional information.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Commit 8e8e019e91 introduces -a option
which will list all subvolumes with distinguishing between relative and
absolute by prepending absolute patch with "<FS_TREE>".
This commit moves the path modification to a filter code rather than
doing so in path construction in resolve_root(). This gives us more
flexibility in formatting path output.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Bug:
-------------
btrfs subvolume list / -a
ID 258 gen 4226 top level 384 path media/smbshare
::
btrfs subvolume list /home -a
ID 258 gen 4226 top level 5 path <FS_TREE>/__active/media/smbshare4.snap
In the first command's output, this path is printed correctly, however
in the second output it has "4.snap" appended, similar to the names of
the snapshots I made 22 hours ago.
------------
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reported-by: Brendan Hide <brendan@swiftspirit.co.za>
There are some unaligned accesses in progs that cause malfunction or
crashes on ARM.
This patch fixes the ones we stumbled upon.
Signed-off-by: Arne Jansen <sensille@gmx.net>
We list the subvolumes under current directory according to the input
subvolume.
However, if we still want to list all the subvolumes in the tree, we
can use '-a' option to help us.
There may be two kinds of path: absolute path , relative path .
The absolute path is beginning with "<FS_TREE>"
The relative path is under current path that you input.
Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
In the privous way, we list all the subvolumes in the filesystem default.
But if a subvolume mounts on another directory, some result's full_path
may be invaild.
According to this, we try to list subvolumes under directoy only by default.
In this way, all the subvolume can be arrived by the full_path.
Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
This patch introduces '-t' option into subvolume list command. By this
option, we can output the result as a table.
Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
This patch introduces '-g' '-c' '--sort' options
The option '-g' can help you filter the subvolumes by the generation, you may
use it just like:
btrfs subvol list -g +/-value <path>
'+' means the generation of the subvolumes should >= the value you specified.
'-' means the generation should <= the value
If you don't input either '+' nor '-', this command will list the subvolumes
that their generation equals to the value.
However if you want to find gengeration between value1 and value2
you may use the above like:
btrfs sub list -g -value1 -g +value2 <path>
The option '-c' can help you filter the subvolumes by the ogeneration, you may
use it just like:
btrfs subvol list -c +/-value <path>
The usage is the same to '-g'
You might want to list subvolumes in order of some items, such as root id, gen
and so on, you can use '--sort'. Now you can sort the subvolumes by root id,
gen, ogen and path.
For example:
If you want to list subvolumes in order of rootid, you can use the option like
that:
btrfs sub list --sort=+/-rooid <path>
Here, '+' means the result is sorted by ascending order. '-' is by descending
order. If you don't specify either '+' nor '-', the result is sorted by
default - ascending order.
If you want to combine sort items, you do it like that:
btrfs sub list --sort=-rootid,+path,ogen,gen <path>
Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
We want 'btrfs subvolume list' only to list readonly subvolumes, this patch set
introduces a new option 'r' to implement it.
You can use the command like that:
btrfs subvolume list -r <path>
Original-Signed-off-by: Zhou Bo <zhoub-fnst@cn.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
The current code of list_subvols() has very bad scalability, if we want to
add new filter conditions or new sort methods, we have to modify lots of code.
Beside that, the most code of list_snapshots() is similar to list_subvols(),
So I restructure list_subvols(), and split the subvolume filter function,
the subvolume sort function and the output function from list_subvols().
In order to implement it, we defined some importtant structures:
struct btrfs_list_filter {
btrfs_list_filter_func filter_func;
void *data;
};
struct btrfs_list_comparer {
btrfs_list_comp_func comp_func;
int is_descending;
};
struct {
char *name;
char *column_name;
int need_print;
} btrfs_list_columns[];
If we want to add a new filter condition, we can choose a suitable filter
function, or implement a new filter function[1], and add it into a set of
the filters, and then pass the filter set into list_subvols(). We also can
mix several filters (just add those filters into the set, and pass the set
into list_subvols()) if the users specify two or more filter conditions.
The subvolume sort function is similar to the subvolume filter function. The
differentiation is the order of comparers in the array which is passed into
list_subvols() show us the priority of the sort methods.
The output function is different with the above two functions, we define a
array to manage all the columns that can be outputed, and use a member variant
(->need_print) to control the output of the relative column. Some columns are
outputed by default. But we can change it according to the requirement of the
users.
After appling this patch, we needn't implement a independent list_snapshots()
function, just pass a filter function which is used to identify the snapshot
into list_subvols().
[1]: If we implement new filter functions or compare functions, we must add
them into the array all_filter_funcs or the array all_comp_funcs, and modify
the relative enum variants(btrfs_list_filter_enum, btrfs_list_comp_enum).
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Now we check if the root item contains otime and uuid or not by comparing
->generation_v2 and ->generation of the btrfs_root_item structure, it is
wrong because it is possbile that ->generation may equal to the first
variant of the next item. We fix this problem by check the size of btrfs_root_item,
if it is larger than the original one, the new btrfs_root_item contains otime
and uuid. we needn't worry the case that the new filesystem is mounted on the
old kernel. because the otime and uuid are not changed on the old kernel, we can
get the correct result even on the kernel.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Applications would need to know the uuid to manage the configurations
associated with the subvol and snapshots
Signed-off-by: Anand Jain <anand.jain@oracle.com>
The idea is that we usually use snapshot to backup/restore our data, and the
common way can be a cron script which makes lots of snapshots, so we can end
up with spending some time to find the latest snapshot to restore.
This adds a feature for 'btrfs subvolume list' to let it list snapshots by their
_created_ generation.
What we need to do is just to list them in descending order and get the latest
snapshot. What's more, we can find the oldest snapshot as well by listing
snapshots in ascending order.
Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
This adds the ability to show root's modification generation when we use
btrfs subvol list.
NOTE:
Like file's atime and ctime, root's generation also has 'creation generation'
and 'modification generation'.
The generation that we're going to show is 'modification generation', and the
next patch is going to show 'creation generation'.
Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Dimitri John Ledkov
David Sterba
Josef Bacik
Hugo Mills
Wang Shilong
Gui Hecheng
Anand Jain
chandan
Chris West (Faux)
Zach Brown
Eric Sandeen
Miao Xie
Wang Shilong
Stefan Behrens
Wang Shilong
Lukas Czerner
Arne Jansen
Zhou Bo
Liu Bo