btrfs-progs: add dev stats on-disk structure
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
parent
b74dbb86c0
commit
0f4ab474fe
21
ctree.h
21
ctree.h
|
@ -919,6 +919,14 @@ struct btrfs_file_extent_item {
|
|||
|
||||
} __attribute__ ((__packed__));
|
||||
|
||||
struct btrfs_dev_stats_item {
|
||||
/*
|
||||
* grow this item struct at the end for future enhancements and keep
|
||||
* the existing values unchanged
|
||||
*/
|
||||
__le64 values[BTRFS_DEV_STAT_VALUES_MAX];
|
||||
} __attribute__ ((__packed__));
|
||||
|
||||
struct btrfs_csum_item {
|
||||
u8 csum;
|
||||
} __attribute__ ((__packed__));
|
||||
|
@ -2333,6 +2341,19 @@ static inline struct btrfs_disk_balance_args* btrfs_balance_item_sys(
|
|||
return &p->sys;
|
||||
}
|
||||
|
||||
/*
|
||||
* btrfs_dev_stats_item helper, returns pointer to the raw array, do the
|
||||
* endiannes conversion, @dsi is offset to eb data
|
||||
*/
|
||||
static inline __le64* btrfs_dev_stats_values(struct extent_buffer *eb,
|
||||
struct btrfs_dev_stats_item *dsi)
|
||||
{
|
||||
unsigned long offset = (unsigned long)dsi;
|
||||
struct btrfs_dev_stats_item *p;
|
||||
p = (struct btrfs_dev_stats_item *)(eb->data + offset);
|
||||
return p->values;
|
||||
}
|
||||
|
||||
/*
|
||||
* this returns the number of bytes used by the item on disk, minus the
|
||||
* size of any extent headers. If a file is compressed on disk, this is
|
||||
|
|
Loading…
Reference in a new issue