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libceph: move message allocation out of ceph_osdc_alloc_request()

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The size of ->r_request and ->r_reply messages depends on the size of
the object name (ceph_object_id), while the size of ceph_osd_request is
fixed.  Move message allocation into a separate function that would
have to be called after ceph_object_id and ceph_object_locator (which
is also going to become variable in size with RADOS namespaces) have
been filled in:

    req = ceph_osdc_alloc_request(...);
    <fill in req->r_base_oid>
    <fill in req->r_base_oloc>
    ceph_osdc_alloc_messages(req);

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Ilya Dryomov 2016-04-27 14:15:51 +02:00
parent 841272825b
commit 13d1ad16d0
5 changed files with 82 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/block/rbd.c
View File

@ -1954,7 +1954,7 @@ static struct ceph_osd_request *rbd_osd_req_create(
osd_req = ceph_osdc_alloc_request(osdc, snapc, num_ops, false,
GFP_NOIO);
if (!osd_req)
return NULL; /* ENOMEM */
goto fail;
if (op_type == OBJ_OP_WRITE || op_type == OBJ_OP_DISCARD)
osd_req->r_flags = CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK;
@ -1967,7 +1967,14 @@ static struct ceph_osd_request *rbd_osd_req_create(
osd_req->r_base_oloc.pool = ceph_file_layout_pg_pool(rbd_dev->layout);
ceph_oid_set_name(&osd_req->r_base_oid, obj_request->object_name);
if (ceph_osdc_alloc_messages(osd_req, GFP_NOIO))
goto fail;
return osd_req;
fail:
ceph_osdc_put_request(osd_req);
return NULL;
}
/*
@ -2003,7 +2010,7 @@ rbd_osd_req_create_copyup(struct rbd_obj_request *obj_request)
osd_req = ceph_osdc_alloc_request(osdc, snapc, num_osd_ops,
false, GFP_NOIO);
if (!osd_req)
return NULL; /* ENOMEM */
goto fail;
osd_req->r_flags = CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK;
osd_req->r_callback = rbd_osd_req_callback;
@ -2012,7 +2019,14 @@ rbd_osd_req_create_copyup(struct rbd_obj_request *obj_request)
osd_req->r_base_oloc.pool = ceph_file_layout_pg_pool(rbd_dev->layout);
ceph_oid_set_name(&osd_req->r_base_oid, obj_request->object_name);
if (ceph_osdc_alloc_messages(osd_req, GFP_NOIO))
goto fail;
return osd_req;
fail:
ceph_osdc_put_request(osd_req);
return NULL;
}

8
fs/ceph/addr.c
View File

@ -1762,6 +1762,10 @@ static int __ceph_pool_perm_get(struct ceph_inode_info *ci, u32 pool)
"%llx.00000000", ci->i_vino.ino);
rd_req->r_base_oid.name_len = strlen(rd_req->r_base_oid.name);
err = ceph_osdc_alloc_messages(rd_req, GFP_NOFS);
if (err)
goto out_unlock;
wr_req = ceph_osdc_alloc_request(&fsc->client->osdc, NULL,
1, false, GFP_NOFS);
if (!wr_req) {
@ -1775,6 +1779,10 @@ static int __ceph_pool_perm_get(struct ceph_inode_info *ci, u32 pool)
wr_req->r_base_oloc.pool = pool;
wr_req->r_base_oid = rd_req->r_base_oid;
err = ceph_osdc_alloc_messages(wr_req, GFP_NOFS);
if (err)
goto out_unlock;
/* one page should be large enough for STAT data */
pages = ceph_alloc_page_vector(1, GFP_KERNEL);
if (IS_ERR(pages)) {

7
fs/ceph/file.c
View File

@ -717,6 +717,13 @@ static void ceph_aio_retry_work(struct work_struct *work)
req->r_base_oloc = orig_req->r_base_oloc;
req->r_base_oid = orig_req->r_base_oid;
ret = ceph_osdc_alloc_messages(req, GFP_NOFS);
if (ret) {
ceph_osdc_put_request(req);
req = orig_req;
goto out;
}
req->r_ops[0] = orig_req->r_ops[0];
osd_req_op_init(req, 1, CEPH_OSD_OP_STARTSYNC, 0);

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

@ -322,6 +322,7 @@ extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *
unsigned int num_ops,
bool use_mempool,
gfp_t gfp_flags);
int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp);
extern void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
struct ceph_snap_context *snapc,

88
net/ceph/osd_client.c
View File

@ -369,8 +369,6 @@ struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
gfp_t gfp_flags)
{
struct ceph_osd_request *req;
struct ceph_msg *msg;
size_t msg_size;
if (use_mempool) {
BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
@ -407,53 +405,59 @@ struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
req->r_base_oloc.pool = -1;
req->r_target_oloc.pool = -1;
msg_size = OSD_OPREPLY_FRONT_LEN;
if (num_ops > CEPH_OSD_SLAB_OPS) {
/* ceph_osd_op and rval */
msg_size += (num_ops - CEPH_OSD_SLAB_OPS) *
(sizeof(struct ceph_osd_op) + 4);
}
dout("%s req %p\n", __func__, req);
return req;
}
EXPORT_SYMBOL(ceph_osdc_alloc_request);
/* create reply message */
if (use_mempool)
msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
else
msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size,
gfp_flags, true);
if (!msg) {
ceph_osdc_put_request(req);
return NULL;
}
req->r_reply = msg;
int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
{
struct ceph_osd_client *osdc = req->r_osdc;
struct ceph_msg *msg;
int msg_size;
/* create request message */
msg_size = 4 + 4 + 4; /* client_inc, osdmap_epoch, flags */
msg_size += 4 + 4 + 4 + 8; /* mtime, reassert_version */
msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */
msg_size += 1 + 8 + 4 + 4; /* pgid */
msg_size += 4 + CEPH_MAX_OID_NAME_LEN; /* oid */
msg_size += 2 + num_ops * sizeof(struct ceph_osd_op);
msg_size += 4 + req->r_base_oid.name_len; /* oid */
msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
msg_size += 8; /* snapid */
msg_size += 8; /* snap_seq */
msg_size += 4 + 8 * (snapc ? snapc->num_snaps : 0); /* snaps */
msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
msg_size += 4; /* retry_attempt */
/* create request message; allow space for oid */
if (use_mempool)
if (req->r_mempool)
msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
else
msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true);
if (!msg) {
ceph_osdc_put_request(req);
return NULL;
}
msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp, true);
if (!msg)
return -ENOMEM;
memset(msg->front.iov_base, 0, msg->front.iov_len);
req->r_request = msg;
return req;
/* create reply message */
msg_size = OSD_OPREPLY_FRONT_LEN;
if (req->r_num_ops > CEPH_OSD_SLAB_OPS) {
/* ceph_osd_op and rval */
msg_size += (req->r_num_ops - CEPH_OSD_SLAB_OPS) *
(sizeof(struct ceph_osd_op) + 4);
}
if (req->r_mempool)
msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
else
msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size, gfp, true);
if (!msg)
return -ENOMEM;
req->r_reply = msg;
return 0;
}
EXPORT_SYMBOL(ceph_osdc_alloc_request);
EXPORT_SYMBOL(ceph_osdc_alloc_messages);
static bool osd_req_opcode_valid(u16 opcode)
{
@ -828,17 +832,17 @@ struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
GFP_NOFS);
if (!req)
return ERR_PTR(-ENOMEM);
if (!req) {
r = -ENOMEM;
goto fail;
}
req->r_flags = flags;
/* calculate max write size */
r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
if (r < 0) {
ceph_osdc_put_request(req);
return ERR_PTR(r);
}
if (r)
goto fail;
if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
osd_req_op_init(req, which, opcode, 0);
@ -864,7 +868,15 @@ struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
"%llx.%08llx", vino.ino, objnum);
req->r_base_oid.name_len = strlen(req->r_base_oid.name);
r = ceph_osdc_alloc_messages(req, GFP_NOFS);
if (r)
goto fail;
return req;
fail:
ceph_osdc_put_request(req);
return ERR_PTR(r);
}
EXPORT_SYMBOL(ceph_osdc_new_request);