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libceph: define new ceph_file_layout structure

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Define new ceph_file_layout structure and rename old ceph_file_layout
to ceph_file_layout_legacy. This is preparation for adding namespace
to ceph_file_layout structure.

Signed-off-by: Yan, Zheng <zyan@redhat.com>
This commit is contained in:
Yan, Zheng
2016-02-03 21:24:49 +08:00
committed by Ilya Dryomov
parent 22748f9d61
commit 7627151ea3
12 changed files with 102 additions and 88 deletions
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48
include/linux/ceph/ceph_fs.h
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@@ -34,9 +34,9 @@
#define CEPH_MAX_MON 31
/*
* ceph_file_layout - describe data layout for a file/inode
* legacy ceph_file_layoute
*/
struct ceph_file_layout {
struct ceph_file_layout_legacy {
/* file -> object mapping */
__le32 fl_stripe_unit; /* stripe unit, in bytes. must be multiple
of page size. */
@@ -53,33 +53,25 @@ struct ceph_file_layout {
__le32 fl_pg_pool; /* namespace, crush ruleset, rep level */
} __attribute__ ((packed));
#define ceph_file_layout_su(l) ((__s32)le32_to_cpu((l).fl_stripe_unit))
#define ceph_file_layout_stripe_count(l) \
((__s32)le32_to_cpu((l).fl_stripe_count))
#define ceph_file_layout_object_size(l) ((__s32)le32_to_cpu((l).fl_object_size))
#define ceph_file_layout_cas_hash(l) ((__s32)le32_to_cpu((l).fl_cas_hash))
#define ceph_file_layout_object_su(l) \
((__s32)le32_to_cpu((l).fl_object_stripe_unit))
#define ceph_file_layout_pg_pool(l) \
((__s32)le32_to_cpu((l).fl_pg_pool))
/*
* ceph_file_layout - describe data layout for a file/inode
*/
struct ceph_file_layout {
/* file -> object mapping */
u32 stripe_unit; /* stripe unit, in bytes */
u32 stripe_count; /* over this many objects */
u32 object_size; /* until objects are this big */
s64 pool_id; /* rados pool id */
};
static inline unsigned ceph_file_layout_stripe_width(struct ceph_file_layout *l)
{
return le32_to_cpu(l->fl_stripe_unit) *
le32_to_cpu(l->fl_stripe_count);
}
/* "period" == bytes before i start on a new set of objects */
static inline unsigned ceph_file_layout_period(struct ceph_file_layout *l)
{
return le32_to_cpu(l->fl_object_size) *
le32_to_cpu(l->fl_stripe_count);
}
extern int ceph_file_layout_is_valid(const struct ceph_file_layout *layout);
extern void ceph_file_layout_from_legacy(struct ceph_file_layout *fl,
struct ceph_file_layout_legacy *legacy);
extern void ceph_file_layout_to_legacy(struct ceph_file_layout *fl,
struct ceph_file_layout_legacy *legacy);
#define CEPH_MIN_STRIPE_UNIT 65536
int ceph_file_layout_is_valid(const struct ceph_file_layout *layout);
struct ceph_dir_layout {
__u8 dl_dir_hash; /* see ceph_hash.h for ids */
__u8 dl_unused1;
@@ -399,7 +391,7 @@ union ceph_mds_request_args {
__le32 flags;
} __attribute__ ((packed)) setxattr;
struct {
struct ceph_file_layout layout;
struct ceph_file_layout_legacy layout;
} __attribute__ ((packed)) setlayout;
struct {
__u8 rule; /* currently fcntl or flock */
@@ -478,7 +470,7 @@ struct ceph_mds_reply_inode {
__le64 version; /* inode version */
__le64 xattr_version; /* version for xattr blob */
struct ceph_mds_reply_cap cap; /* caps issued for this inode */
struct ceph_file_layout layout;
struct ceph_file_layout_legacy layout;
struct ceph_timespec ctime, mtime, atime;
__le32 time_warp_seq;
__le64 size, max_size, truncate_size;
@@ -673,7 +665,7 @@ struct ceph_mds_caps {
__le64 size, max_size, truncate_size;
__le32 truncate_seq;
struct ceph_timespec mtime, atime, ctime;
struct ceph_file_layout layout;
struct ceph_file_layout_legacy layout;
__le32 time_warp_seq;
} __attribute__ ((packed));