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libceph, rbd: add error handling for osd_req_op_cls_init()

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Add proper error handling for osd_req_op_cls_init() to replace
BUG_ON statement when failing from memory allocation.

Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Chengguang Xu 2018-04-12 12:04:55 +08:00 committed by Ilya Dryomov
parent 29dcea8877
commit fe943d5042
3 changed files with 16 additions and 7 deletions
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9
drivers/block/rbd.c
View File

@ -2339,6 +2339,7 @@ static bool is_zero_bvecs(struct bio_vec *bvecs, u32 bytes)
static int rbd_obj_issue_copyup(struct rbd_obj_request *obj_req, u32 bytes) static int rbd_obj_issue_copyup(struct rbd_obj_request *obj_req, u32 bytes)
{ {
unsigned int num_osd_ops = obj_req->osd_req->r_num_ops; unsigned int num_osd_ops = obj_req->osd_req->r_num_ops;
int ret;
dout("%s obj_req %p bytes %u\n", __func__, obj_req, bytes); dout("%s obj_req %p bytes %u\n", __func__, obj_req, bytes);
rbd_assert(obj_req->osd_req->r_ops[0].op == CEPH_OSD_OP_STAT); rbd_assert(obj_req->osd_req->r_ops[0].op == CEPH_OSD_OP_STAT);
@ -2353,6 +2354,11 @@ static int rbd_obj_issue_copyup(struct rbd_obj_request *obj_req, u32 bytes)
if (!obj_req->osd_req) if (!obj_req->osd_req)
return -ENOMEM; return -ENOMEM;
ret = osd_req_op_cls_init(obj_req->osd_req, 0, CEPH_OSD_OP_CALL, "rbd",
"copyup");
if (ret)
return ret;
/* /*
* Only send non-zero copyup data to save some I/O and network * Only send non-zero copyup data to save some I/O and network
* bandwidth -- zero copyup data is equivalent to the object not * bandwidth -- zero copyup data is equivalent to the object not
@ -2362,9 +2368,6 @@ static int rbd_obj_issue_copyup(struct rbd_obj_request *obj_req, u32 bytes)
dout("%s obj_req %p detected zeroes\n", __func__, obj_req); dout("%s obj_req %p detected zeroes\n", __func__, obj_req);
bytes = 0; bytes = 0;
} }
osd_req_op_cls_init(obj_req->osd_req, 0, CEPH_OSD_OP_CALL, "rbd",
"copyup");
osd_req_op_cls_request_data_bvecs(obj_req->osd_req, 0, osd_req_op_cls_request_data_bvecs(obj_req->osd_req, 0,
obj_req->copyup_bvecs, obj_req->copyup_bvecs,
obj_req->copyup_bvec_count, obj_req->copyup_bvec_count,

2
include/linux/ceph/osd_client.h
View File

@ -440,7 +440,7 @@ extern void osd_req_op_cls_response_data_pages(struct ceph_osd_request *,
struct page **pages, u64 length, struct page **pages, u64 length,
u32 alignment, bool pages_from_pool, u32 alignment, bool pages_from_pool,
bool own_pages); bool own_pages);
extern void osd_req_op_cls_init(struct ceph_osd_request *osd_req, extern int osd_req_op_cls_init(struct ceph_osd_request *osd_req,
unsigned int which, u16 opcode, unsigned int which, u16 opcode,
const char *class, const char *method); const char *class, const char *method);
extern int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which, extern int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,

12
net/ceph/osd_client.c
View File

@ -767,7 +767,7 @@ void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
} }
EXPORT_SYMBOL(osd_req_op_extent_dup_last); EXPORT_SYMBOL(osd_req_op_extent_dup_last);
void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which, int osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
u16 opcode, const char *class, const char *method) u16 opcode, const char *class, const char *method)
{ {
struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
@ -779,7 +779,9 @@ void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
BUG_ON(opcode != CEPH_OSD_OP_CALL); BUG_ON(opcode != CEPH_OSD_OP_CALL);
pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS); pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
BUG_ON(!pagelist); if (!pagelist)
return -ENOMEM;
ceph_pagelist_init(pagelist); ceph_pagelist_init(pagelist);
op->cls.class_name = class; op->cls.class_name = class;
@ -799,6 +801,7 @@ void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist); osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
op->indata_len = payload_len; op->indata_len = payload_len;
return 0;
} }
EXPORT_SYMBOL(osd_req_op_cls_init); EXPORT_SYMBOL(osd_req_op_cls_init);
@ -4928,7 +4931,10 @@ int ceph_osdc_call(struct ceph_osd_client *osdc,
if (ret) if (ret)
goto out_put_req; goto out_put_req;
osd_req_op_cls_init(req, 0, CEPH_OSD_OP_CALL, class, method); ret = osd_req_op_cls_init(req, 0, CEPH_OSD_OP_CALL, class, method);
if (ret)
goto out_put_req;
if (req_page) if (req_page)
osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len, osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len,
0, false, false); 0, false, false);