libceph: introduce and start using oid abstraction
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>
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 98792b2..6fdc5fc 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -1809,10 +1809,7 @@
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 @@
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;
}
diff --git a/include/linux/ceph/osd_client.h b/include/linux/ceph/osd_client.h
index b42f158..8d8bb53 100644
--- a/include/linux/ceph/osd_client.h
+++ b/include/linux/ceph/osd_client.h
@@ -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 @@
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 */
diff --git a/include/linux/ceph/osdmap.h b/include/linux/ceph/osdmap.h
index f2679c3..c85f7d4 100644
--- a/include/linux/ceph/osdmap.h
+++ b/include/linux/ceph/osdmap.h
@@ -43,6 +43,18 @@
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+ * (probably outdated: must be 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 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);
diff --git a/net/ceph/debugfs.c b/net/ceph/debugfs.c
index 83661cd..1f85627 100644
--- a/net/ceph/debugfs.c
+++ b/net/ceph/debugfs.c
@@ -132,7 +132,8 @@
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",
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index a053e7e..2988d68 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -765,9 +765,9 @@
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 @@
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 @@
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);