diff options
author | Wang Shilong <wangsl-fnst@cn.fujitsu.com> | 2013-10-07 15:21:37 +0800 |
---|---|---|
committer | Chris Mason <chris.mason@fusionio.com> | 2013-10-16 08:23:12 -0400 |
commit | 1e174d2621fd1e329f5cb581d786efe5105ba1fe (patch) | |
tree | 245ac6b75c76e4b725c5907db23e387b5fd6a19f /qgroup.h | |
parent | 6659f446d4b57018ba7b04a7b9c7cdd553ad9f7a (diff) |
Btrfs-progs: restructure show_qgroups
The current show_qgroups() just shows a little information, and it is hard to
add some functions which the users need in the future, so i restructure it, make
it easy to add new functions.
In order to improve the scalability of show_qgroups(), i add some important
structures:
struct qgroup_lookup {
struct rb_root root;
}
/*
*store qgroup's information
*/
struct btrfs_qgroup {
struct rb_node rb_node;
u64 qgroupid;
u64 generation;
u64 rfer;
u64 rfer_cmpr;
u64 excl_cmpr;
u64 flags;
u64 max_rfer;
u64 max_excl;
u64 rsv_rfer;
u64 rsv_excl;
struct list_head qgroups;
struct list_head members;
}
/*
*glue structure to represent the relations
*between qgroups
*/
struct btrfs_qgroup_list {
struct list_head next_qgroups;
struct list_head next_member;
struct btrfs_qgroup *qgroup;
struct btrfs_qgroup *member;
}
The above 3 structures are used to manage all the information
of qgroups.
struct {
char *name;
char *column_name;
int need_print;
} btrfs_qgroup_columns[]
We define a arrary 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.
For example:
if outputing max referenced size of qgroup is needed,the function
'btrfs_qgroup_setup_column()' will be called, and the parameter 'BTRFS_QGROUP_MAX_RFER'
(extend in the future) will be passsed to the function. After the function is done,
when showing qgroups, max referenced size of qgroup will be output.
Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Diffstat (limited to 'qgroup.h')
-rw-r--r-- | qgroup.h | 10 |
1 files changed, 10 insertions, 0 deletions
@@ -22,6 +22,16 @@ #include "ioctl.h" #include "kerncompat.h" +enum btrfs_qgroup_column_enum { + BTRFS_QGROUP_QGROUPID, + BTRFS_QGROUP_RFER, + BTRFS_QGROUP_EXCL, + BTRFS_QGROUP_ALL, +}; + +int btrfs_show_qgroups(int fd); +void btrfs_qgroup_setup_print_column(enum btrfs_qgroup_column_enum column); + u64 parse_qgroupid(char *p); int qgroup_inherit_size(struct btrfs_qgroup_inherit *p); int qgroup_inherit_add_group(struct btrfs_qgroup_inherit **inherit, char *arg); |