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libceph: introduce and start using oid abstraction

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In preparation for tiering support, which would require having two
(base and target) object names for each osd request and also copying
those names around, introduce struct ceph_object_id (oid) and a couple
helpers to facilitate those copies and encapsulate the fact that object
name is not necessarily a NUL-terminated string.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
This commit is contained in:
Ilya Dryomov 2014-01-27 17:40:18 +02:00
parent 2d0ebc5d59
commit 4295f2217a
5 changed files with 50 additions and 25 deletions
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10
drivers/block/rbd.c
View file

@ -1809,10 +1809,7 @@ static struct ceph_osd_request *rbd_osd_req_create(
osd_req->r_priv = obj_request;
osd_req->r_oloc.pool = ceph_file_layout_pg_pool(rbd_dev->layout);
osd_req->r_oid_len = strlen(obj_request->object_name);
rbd_assert(osd_req->r_oid_len < sizeof (osd_req->r_oid));
memcpy(osd_req->r_oid, obj_request->object_name, osd_req->r_oid_len);
ceph_oid_set_name(&osd_req->r_oid, obj_request->object_name);
return osd_req;
}
@ -1850,10 +1847,7 @@ rbd_osd_req_create_copyup(struct rbd_obj_request *obj_request)
osd_req->r_priv = obj_request;
osd_req->r_oloc.pool = ceph_file_layout_pg_pool(rbd_dev->layout);
osd_req->r_oid_len = strlen(obj_request->object_name);
rbd_assert(osd_req->r_oid_len < sizeof (osd_req->r_oid));
memcpy(osd_req->r_oid, obj_request->object_name, osd_req->r_oid_len);
ceph_oid_set_name(&osd_req->r_oid, obj_request->object_name);
return osd_req;
}

9
include/linux/ceph/osd_client.h
View file

@ -12,12 +12,6 @@
#include <linux/ceph/auth.h>
#include <linux/ceph/pagelist.h>
/*
* Maximum object name size
* (must be at least as big as RBD_MAX_MD_NAME_LEN -- currently 100)
*/
#define CEPH_MAX_OID_NAME_LEN 100
struct ceph_msg;
struct ceph_snap_context;
struct ceph_osd_request;
@ -160,9 +154,8 @@ struct ceph_osd_request {
void *r_priv; /* ditto */
struct ceph_object_locator r_oloc;
struct ceph_object_id r_oid;
char r_oid[CEPH_MAX_OID_NAME_LEN]; /* object name */
int r_oid_len;
u64 r_snapid;
unsigned long r_stamp; /* send OR check time */

36
include/linux/ceph/osdmap.h
View file

@ -43,6 +43,18 @@ struct ceph_object_locator {
s64 pool;
};
/*
* Maximum supported by kernel client object name length
*
* (probably outdated: must be >= RBD_MAX_MD_NAME_LEN -- currently 100)
*/
#define CEPH_MAX_OID_NAME_LEN 100
struct ceph_object_id {
char name[CEPH_MAX_OID_NAME_LEN];
int name_len;
};
struct ceph_pg_mapping {
struct rb_node node;
struct ceph_pg pgid;
@ -72,6 +84,30 @@ struct ceph_osdmap {
struct crush_map *crush;
};
static inline void ceph_oid_set_name(struct ceph_object_id *oid,
const char *name)
{
int len;
len = strlen(name);
if (len > sizeof(oid->name)) {
WARN(1, "ceph_oid_set_name '%s' len %d vs %zu, truncating\n",
name, len, sizeof(oid->name));
len = sizeof(oid->name);
}
memcpy(oid->name, name, len);
oid->name_len = len;
}
static inline void ceph_oid_copy(struct ceph_object_id *dest,
struct ceph_object_id *src)
{
BUG_ON(src->name_len > sizeof(dest->name));
memcpy(dest->name, src->name, src->name_len);
dest->name_len = src->name_len;
}
static inline int ceph_osd_is_up(struct ceph_osdmap *map, int osd)
{
return (osd < map->max_osd) && (map->osd_state[osd] & CEPH_OSD_UP);

3
net/ceph/debugfs.c
View file

@ -132,7 +132,8 @@ static int osdc_show(struct seq_file *s, void *pp)
req->r_osd ? req->r_osd->o_osd : -1,
req->r_pgid.pool, req->r_pgid.seed);
seq_printf(s, "%.*s", req->r_oid_len, req->r_oid);
seq_printf(s, "%.*s", req->r_oid.name_len,
req->r_oid.name);
if (req->r_reassert_version.epoch)
seq_printf(s, "\t%u'%llu",

17
net/ceph/osd_client.c
View file

@ -765,9 +765,9 @@ struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
req->r_oloc.pool = ceph_file_layout_pg_pool(*layout);
snprintf(req->r_oid, sizeof(req->r_oid), "%llx.%08llx",
vino.ino, objnum);
req->r_oid_len = strlen(req->r_oid);
snprintf(req->r_oid.name, sizeof(req->r_oid.name),
"%llx.%08llx", vino.ino, objnum);
req->r_oid.name_len = strlen(req->r_oid.name);
return req;
}
@ -1269,7 +1269,7 @@ static int __map_request(struct ceph_osd_client *osdc,
bool was_paused;
dout("map_request %p tid %lld\n", req, req->r_tid);
err = ceph_calc_ceph_pg(&pgid, req->r_oid, osdc->osdmap,
err = ceph_calc_ceph_pg(&pgid, req->r_oid.name, osdc->osdmap,
req->r_oloc.pool);
if (err) {
list_move(&req->r_req_lru_item, &osdc->req_notarget);
@ -2118,10 +2118,11 @@ void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
ceph_encode_32(&p, -1); /* preferred */
/* oid */
ceph_encode_32(&p, req->r_oid_len);
memcpy(p, req->r_oid, req->r_oid_len);
dout("oid '%.*s' len %d\n", req->r_oid_len, req->r_oid, req->r_oid_len);
p += req->r_oid_len;
ceph_encode_32(&p, req->r_oid.name_len);
memcpy(p, req->r_oid.name, req->r_oid.name_len);
dout("oid '%.*s' len %d\n", req->r_oid.name_len,
req->r_oid.name, req->r_oid.name_len);
p += req->r_oid.name_len;
/* ops--can imply data */
ceph_encode_16(&p, (u16)req->r_num_ops);