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>
Btrfs's subvolume/snapshot is limited to
[BTRFS_FIRST_FREE_OBJECTID, BTRFS_LAST_FREE_OBJECTID], so just apply the range.
Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Commit bab2c565 accidentally broke 'subvol get-default' command by
removing almost all of the underlying code. Bring it back with some
fixes and improvements.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Don't pass a pointer to root_id to resolve_root(). It's always the same as
ri->root_id, passing a pointer hints that root_id can somehow change which is
not true.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
two new commands that make use of the new path resolving functions
implemented for scrub, doing the resolving in-kernel. the result for both
commands is a list of files belonging to that inode / logical address.
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Stephane Chazelas <stephane.chazelas@gmail.com> writes:
> I've got a btrfs FS with 84 subvolumes in it (some created with
> "btrfs sub create", some with "btrfs sub snap" of the other
> ones). There's no nesting of subvolumes at all (all direct children
> of the root subvolume).
>
> The "btrfs subvolume list" is only showing 80 subvolumes. The 4
> missing ones (1 original volume, 3 snapshots) do exist on disk and
> files in there have different st_devs from any other subvolume.
>
> I found
> http://thread.gmane.org/gmane.comp.file-systems.btrfs/8123/focus=8208
>
> which looks like the same issue, with Li Zefan saying he had a
> fix, but I couldn't find any mention that it was actually fixed.
Li Zefan <lizf@cn.fujitsu.com> replied:
> After that, I posted a patch to fix btrfs-progs, which Chris aggreed
> on:
>
> http://marc.info/?l=linux-btrfs&m=129238454714319&w=2
So this btrfs-progs patch should fix missing subvolumes in the output of
"subvolume list":
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Hugo Mills <hugo@carfax.org.uk>
split list_subvols to separate functions and allow printing only in the
containing function. lets us make use of those functions when resolving
logical addresses.
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Add subcommand to get the default subvolume of btrfs filesystem
V2->V3:
* add man page
* based on http://git.darksatanic.net/repo/btrfs-progs-unstable.git
integration-20110705
Reviewed-by: Andreas Philipp <philipp.andreas@gmail.com>
Reviewed-by: Goffredo Baroncelli <kreijack@libero.it>
Reported-by: Yang, Yi <yi.y.yang@intel.com>
Signed-off-by: Zhong, Xin <xin.zhong@intel.com>
In the file btrfs-list.c version.h was included but not used. So just
drop it.
Signed-off-by: Andreas Philipp <philipp.andreas@gmail.com>
Signed-off-by: Hugo Mills <hugo@carfax.org.uk>
There was some discussion on "where" subvolumes live in. Why do we not
simply print the parent ID for each subvolume in btrfs subvolume list?
This patch adds this functionality when called with parameter "-p".
Signed-off-by: Andreas Philipp <philipp.andreas@gmail.com>
Signed-off-by: Hugo Mills <hugo@carfax.org.uk>
When building on ppc64 I hit a number of warnings in printf:
btrfs-map-logical.c:69: error: format ‘%Lu’ expects type ‘long long
unsigned int’, but argument 4 has type ‘u64’
Fix them.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Hugo Mills <hugo@carfax.org.uk>
Hi Chris,
below is enclosed a trivial patch, which has the aim to improve the error
reporting of the "btrfs" command.
You can pull from
http://cassiopea.homelinux.net/git/btrfs-progs-unstable.git
branch
strerror
I changed every printf("some-error") to something like:
e = errno;
fprintf(stderr, "ERROR: .... - %s", strerror(e));
so:
1) all the error are reported to standard error
2) At the end of the message is printed the error as returned by the system.
The change is quite simple, I replaced every printf("some-error") to the line
above. I don't touched anything other.
I also integrated a missing "printf" on the basis of the Ben patch.
This patch leads the btrfs command to be more "user friendly" :-)
Regards
G.Baroncelli
btrfs-list.c | 40 ++++++++++++++++++++++--------
btrfs_cmds.c | 77 ++++++++++++++++++++++++++++++++++++++++-----------------
utils.c | 6 ++++
3 files changed, 89 insertions(+), 34 deletions(-)
Signed-off-by: Chris Mason <chris.mason@oracle.com>
If we meet a bad extent type, find_updated_files is going
to print random things. Better warn the user about what
happens.
This fixes:
btrfs-list.c: Dans la fonction «find_updated_files» :
btrfs-list.c:668: attention : «disk_offset» may be used uninitialized in this function
btrfs-list.c:668: note: «disk_offset» was declared here
btrfs-list.c:667: attention : «disk_start» may be used uninitialized in this function
btrfs-list.c:667: note: «disk_start» was declared here
btrfs-list.c:666: attention : «len» may be used uninitialized in this function
btrfs-list.c:666: note: «len» was declared here
make: *** [btrfs-list.o] Erreur 1
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
When we compile btrfs-progs in RHEL5(with default gcc version 4.1.2 20070626),
we can get following error:
cc1: warnings being treated as errors
btrfs-list.c: In function 'find_updated_files':
btrfs-list.c:668: warning: 'disk_offset' may be used uninitialized in this function
btrfs-list.c:667: warning: 'disk_start' may be used uninitialized in this function
btrfs-list.c:666: warning: 'len' may be used uninitialized in this function
make: *** [btrfs-list.o] Error 1
These varient are always initialized except inconsistent data in file system.
We can set initial value for these variant for this situation.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
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>
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 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>
