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libceph: introduce ceph_pagelist_alloc()

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struct ceph_pagelist cannot be embedded into anything else because it
has its own refcount.  Merge allocation and initialization together.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Ilya Dryomov
2018-09-28 15:38:34 +02:00
parent 24639ce560
commit 33165d4723
6 changed files with 28 additions and 26 deletions
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14
net/ceph/osd_client.c
View File

@@ -776,12 +776,10 @@ int osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
op = _osd_req_op_init(osd_req, which, CEPH_OSD_OP_CALL, 0);
pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
pagelist = ceph_pagelist_alloc(GFP_NOFS);
if (!pagelist)
return -ENOMEM;
ceph_pagelist_init(pagelist);
op->cls.class_name = class;
size = strlen(class);
BUG_ON(size > (size_t) U8_MAX);
@@ -814,12 +812,10 @@ int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS);
pagelist = ceph_pagelist_alloc(GFP_NOFS);
if (!pagelist)
return -ENOMEM;
ceph_pagelist_init(pagelist);
payload_len = strlen(name);
op->xattr.name_len = payload_len;
ceph_pagelist_append(pagelist, name, payload_len);
@@ -4598,11 +4594,10 @@ static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which,
op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0);
pl = kmalloc(sizeof(*pl), GFP_NOIO);
pl = ceph_pagelist_alloc(GFP_NOIO);
if (!pl)
return -ENOMEM;
ceph_pagelist_init(pl);
ret = ceph_pagelist_encode_64(pl, notify_id);
ret |= ceph_pagelist_encode_64(pl, cookie);
if (payload) {
@@ -4669,11 +4664,10 @@ static int osd_req_op_notify_init(struct ceph_osd_request *req, int which,
op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0);
op->notify.cookie = cookie;
pl = kmalloc(sizeof(*pl), GFP_NOIO);
pl = ceph_pagelist_alloc(GFP_NOIO);
if (!pl)
return -ENOMEM;
ceph_pagelist_init(pl);
ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */
ret |= ceph_pagelist_encode_32(pl, timeout);
ret |= ceph_pagelist_encode_32(pl, payload_len);

20
net/ceph/pagelist.c
View File

@@ -6,6 +6,26 @@
#include <linux/highmem.h>
#include <linux/ceph/pagelist.h>
struct ceph_pagelist *ceph_pagelist_alloc(gfp_t gfp_flags)
{
struct ceph_pagelist *pl;
pl = kmalloc(sizeof(*pl), gfp_flags);
if (!pl)
return NULL;
INIT_LIST_HEAD(&pl->head);
pl->mapped_tail = NULL;
pl->length = 0;
pl->room = 0;
INIT_LIST_HEAD(&pl->free_list);
pl->num_pages_free = 0;
refcount_set(&pl->refcnt, 1);
return pl;
}
EXPORT_SYMBOL(ceph_pagelist_alloc);
static void ceph_pagelist_unmap_tail(struct ceph_pagelist *pl)
{
if (pl->mapped_tail) {