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libceph: calculate placement based on the internal data types

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Instead of using the old ceph_object_layout struct, update our internal
ceph_calc_object_layout method to use the ceph_pg type.  This allows us to
pass the full 32-bit precision of the pgid.seed to the callers.  It also
allows some callers to avoid reaching into the request structures for the
struct ceph_object_layout fields.

Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
This commit is contained in:
Sage Weil 2013-02-25 16:13:08 -08:00
parent 4f6a7e5ee1
commit 2169aea649
5 changed files with 15 additions and 22 deletions
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5
fs/ceph/ioctl.c
View file

@ -185,7 +185,6 @@ static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
&ceph_sb_to_client(inode->i_sb)->client->osdc;
u64 len = 1, olen;
u64 tmp;
struct ceph_object_layout ol;
struct ceph_pg pgid;
int r;
@ -209,11 +208,9 @@ static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx",
ceph_ino(inode), dl.object_no);
ceph_calc_object_layout(&ol, dl.object_name, &ci->i_layout,
ceph_calc_object_layout(&pgid, dl.object_name, &ci->i_layout,
osdc->osdmap);
pgid.pool = le32_to_cpu(ol.ol_pgid.pool);
pgid.seed = le16_to_cpu(ol.ol_pgid.ps);
dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid);
if (dl.osd >= 0) {
struct ceph_entity_addr *a =

1
include/linux/ceph/osd_client.h
View file

@ -82,6 +82,7 @@ struct ceph_osd_request {
char r_oid[MAX_OBJ_NAME_SIZE]; /* object name */
int r_oid_len;
u64 r_snapid;
unsigned long r_stamp; /* send OR check time */
struct ceph_file_layout r_file_layout;

2
include/linux/ceph/osdmap.h
View file

@ -129,7 +129,7 @@ extern int ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
u64 *bno, u64 *oxoff, u64 *oxlen);
/* calculate mapping of object to a placement group */
extern int ceph_calc_object_layout(struct ceph_object_layout *ol,
extern int ceph_calc_object_layout(struct ceph_pg *pg,
const char *oid,
struct ceph_file_layout *fl,
struct ceph_osdmap *osdmap);

11
net/ceph/osd_client.c
View file

@ -913,21 +913,18 @@ EXPORT_SYMBOL(ceph_osdc_set_request_linger);
static int __map_request(struct ceph_osd_client *osdc,
struct ceph_osd_request *req, int force_resend)
{
struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base;
struct ceph_pg pgid;
int acting[CEPH_PG_MAX_SIZE];
int o = -1, num = 0;
int err;
dout("map_request %p tid %lld\n", req, req->r_tid);
err = ceph_calc_object_layout(&reqhead->layout, req->r_oid,
err = ceph_calc_object_layout(&pgid, req->r_oid,
&req->r_file_layout, osdc->osdmap);
if (err) {
list_move(&req->r_req_lru_item, &osdc->req_notarget);
return err;
}
pgid.pool = le32_to_cpu(reqhead->layout.ol_pgid.pool);
pgid.seed = le16_to_cpu(reqhead->layout.ol_pgid.ps);
req->r_pgid = pgid;
err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting);
@ -1000,10 +997,16 @@ static void __send_request(struct ceph_osd_client *osdc,
req, req->r_tid, req->r_osd->o_osd, req->r_flags);
reqhead = req->r_request->front.iov_base;
reqhead->snapid = cpu_to_le64(req->r_snapid);
reqhead->osdmap_epoch = cpu_to_le32(osdc->osdmap->epoch);
reqhead->flags |= cpu_to_le32(req->r_flags); /* e.g., RETRY */
reqhead->reassert_version = req->r_reassert_version;
reqhead->layout.ol_pgid.ps = cpu_to_le16(req->r_pgid.seed);
reqhead->layout.ol_pgid.pool = cpu_to_le32(req->r_pgid.pool);
reqhead->layout.ol_pgid.preferred = cpu_to_le16(-1);
reqhead->layout.ol_stripe_unit = 0;
req->r_stamp = jiffies;
list_move_tail(&req->r_req_lru_item, &osdc->req_lru);

18
net/ceph/osdmap.c
View file

@ -1095,32 +1095,24 @@ EXPORT_SYMBOL(ceph_calc_file_object_mapping);
* calculate an object layout (i.e. pgid) from an oid,
* file_layout, and osdmap
*/
int ceph_calc_object_layout(struct ceph_object_layout *ol,
int ceph_calc_object_layout(struct ceph_pg *pg,
const char *oid,
struct ceph_file_layout *fl,
struct ceph_osdmap *osdmap)
{
unsigned int num, num_mask;
struct ceph_pg pgid;
struct ceph_pg_pool_info *pool;
BUG_ON(!osdmap);
pgid.pool = le32_to_cpu(fl->fl_pg_pool);
pool = __lookup_pg_pool(&osdmap->pg_pools, pgid.pool);
pg->pool = le32_to_cpu(fl->fl_pg_pool);
pool = __lookup_pg_pool(&osdmap->pg_pools, pg->pool);
if (!pool)
return -EIO;
pgid.seed = ceph_str_hash(pool->object_hash, oid, strlen(oid));
pg->seed = ceph_str_hash(pool->object_hash, oid, strlen(oid));
num = pool->pg_num;
num_mask = pool->pg_num_mask;
dout("calc_object_layout '%s' pgid %lld.%x\n", oid, pgid.pool,
pgid.seed);
ol->ol_pgid.ps = cpu_to_le16(pgid.seed);
ol->ol_pgid.pool = fl->fl_pg_pool;
ol->ol_pgid.preferred = cpu_to_le16(-1);
ol->ol_stripe_unit = fl->fl_object_stripe_unit;
dout("calc_object_layout '%s' pgid %lld.%x\n", oid, pg->pool, pg->seed);
return 0;
}
EXPORT_SYMBOL(ceph_calc_object_layout);