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OpenCloudOS-Kernel/net/ceph/osd_client.c

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#include <linux/ceph/ceph_debug.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/highmem.h>
#include <linux/mm.h>
#include <linux/pagemap.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#ifdef CONFIG_BLOCK
#include <linux/bio.h>
#endif
#include <linux/ceph/ceph_features.h>
#include <linux/ceph/libceph.h>
#include <linux/ceph/osd_client.h>
#include <linux/ceph/messenger.h>
#include <linux/ceph/decode.h>
#include <linux/ceph/auth.h>
#include <linux/ceph/pagelist.h>
#define OSD_OPREPLY_FRONT_LEN 512
static struct kmem_cache *ceph_osd_request_cache;
static const struct ceph_connection_operations osd_con_ops;
/*
* Implement client access to distributed object storage cluster.
*
* All data objects are stored within a cluster/cloud of OSDs, or
* "object storage devices." (Note that Ceph OSDs have _nothing_ to
* do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply
* remote daemons serving up and coordinating consistent and safe
* access to storage.
*
* Cluster membership and the mapping of data objects onto storage devices
* are described by the osd map.
*
* We keep track of pending OSD requests (read, write), resubmit
* requests to different OSDs when the cluster topology/data layout
* change, or retry the affected requests when the communications
* channel with an OSD is reset.
*/
static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req);
static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req);
static void link_linger(struct ceph_osd *osd,
struct ceph_osd_linger_request *lreq);
static void unlink_linger(struct ceph_osd *osd,
struct ceph_osd_linger_request *lreq);
static void clear_backoffs(struct ceph_osd *osd);
#if 1
static inline bool rwsem_is_wrlocked(struct rw_semaphore *sem)
{
bool wrlocked = true;
if (unlikely(down_read_trylock(sem))) {
wrlocked = false;
up_read(sem);
}
return wrlocked;
}
static inline void verify_osdc_locked(struct ceph_osd_client *osdc)
{
WARN_ON(!rwsem_is_locked(&osdc->lock));
}
static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc)
{
WARN_ON(!rwsem_is_wrlocked(&osdc->lock));
}
static inline void verify_osd_locked(struct ceph_osd *osd)
{
struct ceph_osd_client *osdc = osd->o_osdc;
WARN_ON(!(mutex_is_locked(&osd->lock) &&
rwsem_is_locked(&osdc->lock)) &&
!rwsem_is_wrlocked(&osdc->lock));
}
static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq)
{
WARN_ON(!mutex_is_locked(&lreq->lock));
}
#else
static inline void verify_osdc_locked(struct ceph_osd_client *osdc) { }
static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) { }
static inline void verify_osd_locked(struct ceph_osd *osd) { }
static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) { }
#endif
/*
* calculate the mapping of a file extent onto an object, and fill out the
* request accordingly. shorten extent as necessary if it crosses an
* object boundary.
*
* fill osd op in request message.
*/
static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
u64 *objnum, u64 *objoff, u64 *objlen)
{
u64 orig_len = *plen;
int r;
/* object extent? */
r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
objoff, objlen);
if (r < 0)
return r;
if (*objlen < orig_len) {
*plen = *objlen;
dout(" skipping last %llu, final file extent %llu~%llu\n",
orig_len - *plen, off, *plen);
}
dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
return 0;
}
static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
{
memset(osd_data, 0, sizeof (*osd_data));
osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
}
static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
struct page **pages, u64 length, u32 alignment,
bool pages_from_pool, bool own_pages)
{
osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
osd_data->pages = pages;
osd_data->length = length;
osd_data->alignment = alignment;
osd_data->pages_from_pool = pages_from_pool;
osd_data->own_pages = own_pages;
}
static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
struct ceph_pagelist *pagelist)
{
osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
osd_data->pagelist = pagelist;
}
#ifdef CONFIG_BLOCK
static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
struct bio *bio, size_t bio_length)
{
osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
osd_data->bio = bio;
osd_data->bio_length = bio_length;
}
#endif /* CONFIG_BLOCK */
#define osd_req_op_data(oreq, whch, typ, fld) \
({ \
struct ceph_osd_request *__oreq = (oreq); \
unsigned int __whch = (whch); \
BUG_ON(__whch >= __oreq->r_num_ops); \
&__oreq->r_ops[__whch].typ.fld; \
})
static struct ceph_osd_data *
osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
{
BUG_ON(which >= osd_req->r_num_ops);
return &osd_req->r_ops[which].raw_data_in;
}
struct ceph_osd_data *
osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
unsigned int which)
{
return osd_req_op_data(osd_req, which, extent, osd_data);
}
EXPORT_SYMBOL(osd_req_op_extent_osd_data);
void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
unsigned int which, struct page **pages,
u64 length, u32 alignment,
bool pages_from_pool, bool own_pages)
{
struct ceph_osd_data *osd_data;
osd_data = osd_req_op_raw_data_in(osd_req, which);
ceph_osd_data_pages_init(osd_data, pages, length, alignment,
pages_from_pool, own_pages);
}
EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
unsigned int which, struct page **pages,
u64 length, u32 alignment,
bool pages_from_pool, bool own_pages)
{
struct ceph_osd_data *osd_data;
osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
ceph_osd_data_pages_init(osd_data, pages, length, alignment,
pages_from_pool, own_pages);
}
EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
unsigned int which, struct ceph_pagelist *pagelist)
{
struct ceph_osd_data *osd_data;
osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
ceph_osd_data_pagelist_init(osd_data, pagelist);
}
EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
#ifdef CONFIG_BLOCK
void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
unsigned int which, struct bio *bio, size_t bio_length)
{
struct ceph_osd_data *osd_data;
osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
ceph_osd_data_bio_init(osd_data, bio, bio_length);
}
EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
#endif /* CONFIG_BLOCK */
static void osd_req_op_cls_request_info_pagelist(
struct ceph_osd_request *osd_req,
unsigned int which, struct ceph_pagelist *pagelist)
{
struct ceph_osd_data *osd_data;
osd_data = osd_req_op_data(osd_req, which, cls, request_info);
ceph_osd_data_pagelist_init(osd_data, pagelist);
}
void osd_req_op_cls_request_data_pagelist(
struct ceph_osd_request *osd_req,
unsigned int which, struct ceph_pagelist *pagelist)
{
struct ceph_osd_data *osd_data;
osd_data = osd_req_op_data(osd_req, which, cls, request_data);
ceph_osd_data_pagelist_init(osd_data, pagelist);
osd_req->r_ops[which].cls.indata_len += pagelist->length;
osd_req->r_ops[which].indata_len += pagelist->length;
}
EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
unsigned int which, struct page **pages, u64 length,
u32 alignment, bool pages_from_pool, bool own_pages)
{
struct ceph_osd_data *osd_data;
osd_data = osd_req_op_data(osd_req, which, cls, request_data);
ceph_osd_data_pages_init(osd_data, pages, length, alignment,
pages_from_pool, own_pages);
osd_req->r_ops[which].cls.indata_len += length;
osd_req->r_ops[which].indata_len += length;
}
EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
unsigned int which, struct page **pages, u64 length,
u32 alignment, bool pages_from_pool, bool own_pages)
{
struct ceph_osd_data *osd_data;
osd_data = osd_req_op_data(osd_req, which, cls, response_data);
ceph_osd_data_pages_init(osd_data, pages, length, alignment,
pages_from_pool, own_pages);
}
EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
{
switch (osd_data->type) {
case CEPH_OSD_DATA_TYPE_NONE:
return 0;
case CEPH_OSD_DATA_TYPE_PAGES:
return osd_data->length;
case CEPH_OSD_DATA_TYPE_PAGELIST:
return (u64)osd_data->pagelist->length;
#ifdef CONFIG_BLOCK
case CEPH_OSD_DATA_TYPE_BIO:
return (u64)osd_data->bio_length;
#endif /* CONFIG_BLOCK */
default:
WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
return 0;
}
}
static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
{
if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
int num_pages;
num_pages = calc_pages_for((u64)osd_data->alignment,
(u64)osd_data->length);
ceph_release_page_vector(osd_data->pages, num_pages);
}
ceph_osd_data_init(osd_data);
}
static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
unsigned int which)
{
struct ceph_osd_req_op *op;
BUG_ON(which >= osd_req->r_num_ops);
op = &osd_req->r_ops[which];
switch (op->op) {
case CEPH_OSD_OP_READ:
case CEPH_OSD_OP_WRITE:
case CEPH_OSD_OP_WRITEFULL:
ceph_osd_data_release(&op->extent.osd_data);
break;
case CEPH_OSD_OP_CALL:
ceph_osd_data_release(&op->cls.request_info);
ceph_osd_data_release(&op->cls.request_data);
ceph_osd_data_release(&op->cls.response_data);
break;
case CEPH_OSD_OP_SETXATTR:
case CEPH_OSD_OP_CMPXATTR:
ceph_osd_data_release(&op->xattr.osd_data);
break;
case CEPH_OSD_OP_STAT:
ceph_osd_data_release(&op->raw_data_in);
break;
case CEPH_OSD_OP_NOTIFY_ACK:
ceph_osd_data_release(&op->notify_ack.request_data);
break;
case CEPH_OSD_OP_NOTIFY:
ceph_osd_data_release(&op->notify.request_data);
ceph_osd_data_release(&op->notify.response_data);
break;
case CEPH_OSD_OP_LIST_WATCHERS:
ceph_osd_data_release(&op->list_watchers.response_data);
break;
default:
break;
}
}
/*
* Assumes @t is zero-initialized.
*/
static void target_init(struct ceph_osd_request_target *t)
{
ceph_oid_init(&t->base_oid);
ceph_oloc_init(&t->base_oloc);
ceph_oid_init(&t->target_oid);
ceph_oloc_init(&t->target_oloc);
ceph_osds_init(&t->acting);
ceph_osds_init(&t->up);
t->size = -1;
t->min_size = -1;
t->osd = CEPH_HOMELESS_OSD;
}
static void target_copy(struct ceph_osd_request_target *dest,
const struct ceph_osd_request_target *src)
{
ceph_oid_copy(&dest->base_oid, &src->base_oid);
ceph_oloc_copy(&dest->base_oloc, &src->base_oloc);
ceph_oid_copy(&dest->target_oid, &src->target_oid);
ceph_oloc_copy(&dest->target_oloc, &src->target_oloc);
dest->pgid = src->pgid; /* struct */
dest->spgid = src->spgid; /* struct */
dest->pg_num = src->pg_num;
dest->pg_num_mask = src->pg_num_mask;
ceph_osds_copy(&dest->acting, &src->acting);
ceph_osds_copy(&dest->up, &src->up);
dest->size = src->size;
dest->min_size = src->min_size;
dest->sort_bitwise = src->sort_bitwise;
dest->flags = src->flags;
dest->paused = src->paused;
dest->epoch = src->epoch;
dest->last_force_resend = src->last_force_resend;
dest->osd = src->osd;
}
static void target_destroy(struct ceph_osd_request_target *t)
{
ceph_oid_destroy(&t->base_oid);
ceph_oloc_destroy(&t->base_oloc);
ceph_oid_destroy(&t->target_oid);
ceph_oloc_destroy(&t->target_oloc);
}
/*
* requests
*/
static void request_release_checks(struct ceph_osd_request *req)
{
WARN_ON(!RB_EMPTY_NODE(&req->r_node));
WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node));
WARN_ON(!list_empty(&req->r_unsafe_item));
WARN_ON(req->r_osd);
}
static void ceph_osdc_release_request(struct kref *kref)
{
struct ceph_osd_request *req = container_of(kref,
struct ceph_osd_request, r_kref);
unsigned int which;
dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
req->r_request, req->r_reply);
request_release_checks(req);
if (req->r_request)
ceph_msg_put(req->r_request);
if (req->r_reply)
ceph_msg_put(req->r_reply);
for (which = 0; which < req->r_num_ops; which++)
osd_req_op_data_release(req, which);
target_destroy(&req->r_t);
ceph_put_snap_context(req->r_snapc);
if (req->r_mempool)
mempool_free(req, req->r_osdc->req_mempool);
else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
kmem_cache_free(ceph_osd_request_cache, req);
else
kfree(req);
}
void ceph_osdc_get_request(struct ceph_osd_request *req)
{
dout("%s %p (was %d)\n", __func__, req,
kref_read(&req->r_kref));
kref_get(&req->r_kref);
}
EXPORT_SYMBOL(ceph_osdc_get_request);
void ceph_osdc_put_request(struct ceph_osd_request *req)
{
if (req) {
dout("%s %p (was %d)\n", __func__, req,
kref_read(&req->r_kref));
kref_put(&req->r_kref, ceph_osdc_release_request);
}
}
EXPORT_SYMBOL(ceph_osdc_put_request);
static void request_init(struct ceph_osd_request *req)
{
/* req only, each op is zeroed in _osd_req_op_init() */
memset(req, 0, sizeof(*req));
kref_init(&req->r_kref);
init_completion(&req->r_completion);
RB_CLEAR_NODE(&req->r_node);
RB_CLEAR_NODE(&req->r_mc_node);
INIT_LIST_HEAD(&req->r_unsafe_item);
target_init(&req->r_t);
}
/*
* This is ugly, but it allows us to reuse linger registration and ping
* requests, keeping the structure of the code around send_linger{_ping}()
* reasonable. Setting up a min_nr=2 mempool for each linger request
* and dealing with copying ops (this blasts req only, watch op remains
* intact) isn't any better.
*/
static void request_reinit(struct ceph_osd_request *req)
{
struct ceph_osd_client *osdc = req->r_osdc;
bool mempool = req->r_mempool;
unsigned int num_ops = req->r_num_ops;
u64 snapid = req->r_snapid;
struct ceph_snap_context *snapc = req->r_snapc;
bool linger = req->r_linger;
struct ceph_msg *request_msg = req->r_request;
struct ceph_msg *reply_msg = req->r_reply;
dout("%s req %p\n", __func__, req);
WARN_ON(kref_read(&req->r_kref) != 1);
request_release_checks(req);
WARN_ON(kref_read(&request_msg->kref) != 1);
WARN_ON(kref_read(&reply_msg->kref) != 1);
target_destroy(&req->r_t);
request_init(req);
req->r_osdc = osdc;
req->r_mempool = mempool;
req->r_num_ops = num_ops;
req->r_snapid = snapid;
req->r_snapc = snapc;
req->r_linger = linger;
req->r_request = request_msg;
req->r_reply = reply_msg;
}
struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
struct ceph_snap_context *snapc,
unsigned int num_ops,
bool use_mempool,
gfp_t gfp_flags)
{
struct ceph_osd_request *req;
if (use_mempool) {
BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
req = mempool_alloc(osdc->req_mempool, gfp_flags);
} else if (num_ops <= CEPH_OSD_SLAB_OPS) {
req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
} else {
BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
req = kmalloc(sizeof(*req) + num_ops * sizeof(req->r_ops[0]),
gfp_flags);
}
if (unlikely(!req))
return NULL;
request_init(req);
req->r_osdc = osdc;
req->r_mempool = use_mempool;
req->r_num_ops = num_ops;
req->r_snapid = CEPH_NOSNAP;
req->r_snapc = ceph_get_snap_context(snapc);
dout("%s req %p\n", __func__, req);
return req;
}
EXPORT_SYMBOL(ceph_osdc_alloc_request);
static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc)
{
return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0);
}
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;
WARN_ON(ceph_oid_empty(&req->r_base_oid));
WARN_ON(ceph_oloc_empty(&req->r_base_oloc));
/* create request message */
msg_size = CEPH_ENCODING_START_BLK_LEN +
CEPH_PGID_ENCODING_LEN + 1; /* spgid */
msg_size += 4 + 4 + 4; /* hash, osdmap_epoch, flags */
msg_size += CEPH_ENCODING_START_BLK_LEN +
sizeof(struct ceph_osd_reqid); /* reqid */
msg_size += sizeof(struct ceph_blkin_trace_info); /* trace */
msg_size += 4 + sizeof(struct ceph_timespec); /* client_inc, mtime */
msg_size += CEPH_ENCODING_START_BLK_LEN +
ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */
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 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
msg_size += 4 + 8; /* retry_attempt, features */
if (req->r_mempool)
msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
else
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;
/* create reply message */
msg_size = OSD_OPREPLY_FRONT_LEN;
msg_size += req->r_base_oid.name_len;
msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
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_messages);
static bool osd_req_opcode_valid(u16 opcode)
{
switch (opcode) {
#define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
__CEPH_FORALL_OSD_OPS(GENERATE_CASE)
#undef GENERATE_CASE
default:
return false;
}
}
/*
* This is an osd op init function for opcodes that have no data or
* other information associated with them. It also serves as a
* common init routine for all the other init functions, below.
*/
static struct ceph_osd_req_op *
_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
u16 opcode, u32 flags)
{
struct ceph_osd_req_op *op;
BUG_ON(which >= osd_req->r_num_ops);
BUG_ON(!osd_req_opcode_valid(opcode));
op = &osd_req->r_ops[which];
memset(op, 0, sizeof (*op));
op->op = opcode;
op->flags = flags;
return op;
}
void osd_req_op_init(struct ceph_osd_request *osd_req,
unsigned int which, u16 opcode, u32 flags)
{
(void)_osd_req_op_init(osd_req, which, opcode, flags);
}
EXPORT_SYMBOL(osd_req_op_init);
void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
unsigned int which, u16 opcode,
u64 offset, u64 length,
u64 truncate_size, u32 truncate_seq)
{
struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
opcode, 0);
size_t payload_len = 0;
BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
opcode != CEPH_OSD_OP_TRUNCATE);
op->extent.offset = offset;
op->extent.length = length;
op->extent.truncate_size = truncate_size;
op->extent.truncate_seq = truncate_seq;
if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
payload_len += length;
op->indata_len = payload_len;
}
EXPORT_SYMBOL(osd_req_op_extent_init);
void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
unsigned int which, u64 length)
{
struct ceph_osd_req_op *op;
u64 previous;
BUG_ON(which >= osd_req->r_num_ops);
op = &osd_req->r_ops[which];
previous = op->extent.length;
if (length == previous)
return; /* Nothing to do */
BUG_ON(length > previous);
op->extent.length = length;
if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
op->indata_len -= previous - length;
}
EXPORT_SYMBOL(osd_req_op_extent_update);
void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
unsigned int which, u64 offset_inc)
{
struct ceph_osd_req_op *op, *prev_op;
BUG_ON(which + 1 >= osd_req->r_num_ops);
prev_op = &osd_req->r_ops[which];
op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
/* dup previous one */
op->indata_len = prev_op->indata_len;
op->outdata_len = prev_op->outdata_len;
op->extent = prev_op->extent;
/* adjust offset */
op->extent.offset += offset_inc;
op->extent.length -= offset_inc;
if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
op->indata_len -= offset_inc;
}
EXPORT_SYMBOL(osd_req_op_extent_dup_last);
void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
u16 opcode, const char *class, const char *method)
{
struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
opcode, 0);
struct ceph_pagelist *pagelist;
size_t payload_len = 0;
size_t size;
BUG_ON(opcode != CEPH_OSD_OP_CALL);
pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
BUG_ON(!pagelist);
ceph_pagelist_init(pagelist);
op->cls.class_name = class;
size = strlen(class);
BUG_ON(size > (size_t) U8_MAX);
op->cls.class_len = size;
ceph_pagelist_append(pagelist, class, size);
payload_len += size;
op->cls.method_name = method;
size = strlen(method);
BUG_ON(size > (size_t) U8_MAX);
op->cls.method_len = size;
ceph_pagelist_append(pagelist, method, size);
payload_len += size;
osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
op->indata_len = payload_len;
}
EXPORT_SYMBOL(osd_req_op_cls_init);
int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
u16 opcode, const char *name, const void *value,
size_t size, u8 cmp_op, u8 cmp_mode)
{
struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
opcode, 0);
struct ceph_pagelist *pagelist;
size_t payload_len;
BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
pagelist = kmalloc(sizeof(*pagelist), 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);
op->xattr.value_len = size;
ceph_pagelist_append(pagelist, value, size);
payload_len += size;
op->xattr.cmp_op = cmp_op;
op->xattr.cmp_mode = cmp_mode;
ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
op->indata_len = payload_len;
return 0;
}
EXPORT_SYMBOL(osd_req_op_xattr_init);
/*
* @watch_opcode: CEPH_OSD_WATCH_OP_*
*/
static void osd_req_op_watch_init(struct ceph_osd_request *req, int which,
u64 cookie, u8 watch_opcode)
{
struct ceph_osd_req_op *op;
op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0);
op->watch.cookie = cookie;
op->watch.op = watch_opcode;
op->watch.gen = 0;
}
void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
unsigned int which,
u64 expected_object_size,
u64 expected_write_size)
{
struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
CEPH_OSD_OP_SETALLOCHINT,
0);
op->alloc_hint.expected_object_size = expected_object_size;
op->alloc_hint.expected_write_size = expected_write_size;
/*
* CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
* not worth a feature bit. Set FAILOK per-op flag to make
* sure older osds don't trip over an unsupported opcode.
*/
op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
}
EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
struct ceph_osd_data *osd_data)
{
u64 length = ceph_osd_data_length(osd_data);
if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
BUG_ON(length > (u64) SIZE_MAX);
if (length)
ceph_msg_data_add_pages(msg, osd_data->pages,
length, osd_data->alignment);
} else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
BUG_ON(!length);
ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
#ifdef CONFIG_BLOCK
} else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
ceph_msg_data_add_bio(msg, osd_data->bio, length);
#endif
} else {
BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
}
}
static u32 osd_req_encode_op(struct ceph_osd_op *dst,
const struct ceph_osd_req_op *src)
{
if (WARN_ON(!osd_req_opcode_valid(src->op))) {
pr_err("unrecognized osd opcode %d\n", src->op);
return 0;
}
switch (src->op) {
case CEPH_OSD_OP_STAT:
break;
case CEPH_OSD_OP_READ:
case CEPH_OSD_OP_WRITE:
case CEPH_OSD_OP_WRITEFULL:
case CEPH_OSD_OP_ZERO:
case CEPH_OSD_OP_TRUNCATE:
dst->extent.offset = cpu_to_le64(src->extent.offset);
dst->extent.length = cpu_to_le64(src->extent.length);
dst->extent.truncate_size =
cpu_to_le64(src->extent.truncate_size);
dst->extent.truncate_seq =
cpu_to_le32(src->extent.truncate_seq);
break;
case CEPH_OSD_OP_CALL:
dst->cls.class_len = src->cls.class_len;
dst->cls.method_len = src->cls.method_len;
dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
break;
case CEPH_OSD_OP_WATCH:
dst->watch.cookie = cpu_to_le64(src->watch.cookie);
dst->watch.ver = cpu_to_le64(0);
dst->watch.op = src->watch.op;
dst->watch.gen = cpu_to_le32(src->watch.gen);
break;
case CEPH_OSD_OP_NOTIFY_ACK:
break;
case CEPH_OSD_OP_NOTIFY:
dst->notify.cookie = cpu_to_le64(src->notify.cookie);
break;
case CEPH_OSD_OP_LIST_WATCHERS:
break;
case CEPH_OSD_OP_SETALLOCHINT:
dst->alloc_hint.expected_object_size =
cpu_to_le64(src->alloc_hint.expected_object_size);
dst->alloc_hint.expected_write_size =
cpu_to_le64(src->alloc_hint.expected_write_size);
break;
case CEPH_OSD_OP_SETXATTR:
case CEPH_OSD_OP_CMPXATTR:
dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
dst->xattr.cmp_op = src->xattr.cmp_op;
dst->xattr.cmp_mode = src->xattr.cmp_mode;
break;
case CEPH_OSD_OP_CREATE:
case CEPH_OSD_OP_DELETE:
break;
default:
pr_err("unsupported osd opcode %s\n",
ceph_osd_op_name(src->op));
WARN_ON(1);
return 0;
}
dst->op = cpu_to_le16(src->op);
dst->flags = cpu_to_le32(src->flags);
dst->payload_len = cpu_to_le32(src->indata_len);
return src->indata_len;
}
/*
* build new request AND message, calculate layout, and adjust file
* extent as needed.
*
* if the file was recently truncated, we include information about its
* old and new size so that the object can be updated appropriately. (we
* avoid synchronously deleting truncated objects because it's slow.)
*/
struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
struct ceph_file_layout *layout,
struct ceph_vino vino,
u64 off, u64 *plen,
unsigned int which, int num_ops,
int opcode, int flags,
struct ceph_snap_context *snapc,
u32 truncate_seq,
u64 truncate_size,
bool use_mempool)
{
struct ceph_osd_request *req;
u64 objnum = 0;
u64 objoff = 0;
u64 objlen = 0;
int r;
BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
GFP_NOFS);
if (!req) {
r = -ENOMEM;
goto fail;
}
/* calculate max write size */
r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
if (r)
goto fail;
if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
osd_req_op_init(req, which, opcode, 0);
} else {
u32 object_size = layout->object_size;
u32 object_base = off - objoff;
if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
if (truncate_size <= object_base) {
truncate_size = 0;
} else {
truncate_size -= object_base;
if (truncate_size > object_size)
truncate_size = object_size;
}
}
osd_req_op_extent_init(req, which, opcode, objoff, objlen,
truncate_size, truncate_seq);
}
req->r_abort_on_full = true;
req->r_flags = flags;
req->r_base_oloc.pool = layout->pool_id;
req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns);
ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
req->r_snapid = vino.snap;
if (flags & CEPH_OSD_FLAG_WRITE)
req->r_data_offset = off;
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);
/*
* We keep osd requests in an rbtree, sorted by ->r_tid.
*/
DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
static bool osd_homeless(struct ceph_osd *osd)
{
return osd->o_osd == CEPH_HOMELESS_OSD;
}
static bool osd_registered(struct ceph_osd *osd)
{
verify_osdc_locked(osd->o_osdc);
return !RB_EMPTY_NODE(&osd->o_node);
}
/*
* Assumes @osd is zero-initialized.
*/
static void osd_init(struct ceph_osd *osd)
{
refcount_set(&osd->o_ref, 1);
RB_CLEAR_NODE(&osd->o_node);
osd->o_requests = RB_ROOT;
osd->o_linger_requests = RB_ROOT;
osd->o_backoff_mappings = RB_ROOT;
osd->o_backoffs_by_id = RB_ROOT;
INIT_LIST_HEAD(&osd->o_osd_lru);
INIT_LIST_HEAD(&osd->o_keepalive_item);
osd->o_incarnation = 1;
mutex_init(&osd->lock);
}
static void osd_cleanup(struct ceph_osd *osd)
{
WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings));
WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id));
WARN_ON(!list_empty(&osd->o_osd_lru));
WARN_ON(!list_empty(&osd->o_keepalive_item));
if (osd->o_auth.authorizer) {
WARN_ON(osd_homeless(osd));
ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
}
}
/*
* Track open sessions with osds.
*/
static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
{
struct ceph_osd *osd;
WARN_ON(onum == CEPH_HOMELESS_OSD);
osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
osd_init(osd);
osd->o_osdc = osdc;
osd->o_osd = onum;
ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
return osd;
}
static struct ceph_osd *get_osd(struct ceph_osd *osd)
{
if (refcount_inc_not_zero(&osd->o_ref)) {
dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1,
refcount_read(&osd->o_ref));
return osd;
} else {
dout("get_osd %p FAIL\n", osd);
return NULL;
}
}
static void put_osd(struct ceph_osd *osd)
{
dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref),
refcount_read(&osd->o_ref) - 1);
if (refcount_dec_and_test(&osd->o_ref)) {
osd_cleanup(osd);
kfree(osd);
}
}
DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
static void __move_osd_to_lru(struct ceph_osd *osd)
{
struct ceph_osd_client *osdc = osd->o_osdc;
dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
BUG_ON(!list_empty(&osd->o_osd_lru));
spin_lock(&osdc->osd_lru_lock);
list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
spin_unlock(&osdc->osd_lru_lock);
osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
}
static void maybe_move_osd_to_lru(struct ceph_osd *osd)
{
if (RB_EMPTY_ROOT(&osd->o_requests) &&
RB_EMPTY_ROOT(&osd->o_linger_requests))
__move_osd_to_lru(osd);
}
static void __remove_osd_from_lru(struct ceph_osd *osd)
{
struct ceph_osd_client *osdc = osd->o_osdc;
dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
spin_lock(&osdc->osd_lru_lock);
if (!list_empty(&osd->o_osd_lru))
list_del_init(&osd->o_osd_lru);
spin_unlock(&osdc->osd_lru_lock);
}
/*
* Close the connection and assign any leftover requests to the
* homeless session.
*/
static void close_osd(struct ceph_osd *osd)
{
struct ceph_osd_client *osdc = osd->o_osdc;
struct rb_node *n;
verify_osdc_wrlocked(osdc);
dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
ceph_con_close(&osd->o_con);
for (n = rb_first(&osd->o_requests); n; ) {
struct ceph_osd_request *req =
rb_entry(n, struct ceph_osd_request, r_node);
n = rb_next(n); /* unlink_request() */
dout(" reassigning req %p tid %llu\n", req, req->r_tid);
unlink_request(osd, req);
link_request(&osdc->homeless_osd, req);
}
for (n = rb_first(&osd->o_linger_requests); n; ) {
struct ceph_osd_linger_request *lreq =
rb_entry(n, struct ceph_osd_linger_request, node);
n = rb_next(n); /* unlink_linger() */
dout(" reassigning lreq %p linger_id %llu\n", lreq,
lreq->linger_id);
unlink_linger(osd, lreq);
link_linger(&osdc->homeless_osd, lreq);
}
clear_backoffs(osd);
__remove_osd_from_lru(osd);
erase_osd(&osdc->osds, osd);
put_osd(osd);
}
/*
* reset osd connect
*/
static int reopen_osd(struct ceph_osd *osd)
{
struct ceph_entity_addr *peer_addr;
dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
if (RB_EMPTY_ROOT(&osd->o_requests) &&
RB_EMPTY_ROOT(&osd->o_linger_requests)) {
close_osd(osd);
return -ENODEV;
}
peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd];
if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
!ceph_con_opened(&osd->o_con)) {
struct rb_node *n;
dout("osd addr hasn't changed and connection never opened, "
"letting msgr retry\n");
/* touch each r_stamp for handle_timeout()'s benfit */
for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
struct ceph_osd_request *req =
rb_entry(n, struct ceph_osd_request, r_node);
req->r_stamp = jiffies;
}
return -EAGAIN;
}
ceph_con_close(&osd->o_con);
ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
osd->o_incarnation++;
return 0;
}
static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o,
bool wrlocked)
{
struct ceph_osd *osd;
if (wrlocked)
verify_osdc_wrlocked(osdc);
else
verify_osdc_locked(osdc);
if (o != CEPH_HOMELESS_OSD)
osd = lookup_osd(&osdc->osds, o);
else
osd = &osdc->homeless_osd;
if (!osd) {
if (!wrlocked)
return ERR_PTR(-EAGAIN);
osd = create_osd(osdc, o);
insert_osd(&osdc->osds, osd);
ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd,
&osdc->osdmap->osd_addr[osd->o_osd]);
}
dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd);
return osd;
}
/*
* Create request <-> OSD session relation.
*
* @req has to be assigned a tid, @osd may be homeless.
*/
static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req)
{
verify_osd_locked(osd);
WARN_ON(!req->r_tid || req->r_osd);
dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
req, req->r_tid);
if (!osd_homeless(osd))
__remove_osd_from_lru(osd);
else
atomic_inc(&osd->o_osdc->num_homeless);
get_osd(osd);
insert_request(&osd->o_requests, req);
req->r_osd = osd;
}
static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req)
{
verify_osd_locked(osd);
WARN_ON(req->r_osd != osd);
dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
req, req->r_tid);
req->r_osd = NULL;
erase_request(&osd->o_requests, req);
put_osd(osd);
if (!osd_homeless(osd))
maybe_move_osd_to_lru(osd);
else
atomic_dec(&osd->o_osdc->num_homeless);
}
static bool __pool_full(struct ceph_pg_pool_info *pi)
{
return pi->flags & CEPH_POOL_FLAG_FULL;
}
static bool have_pool_full(struct ceph_osd_client *osdc)
{
struct rb_node *n;
for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
struct ceph_pg_pool_info *pi =
rb_entry(n, struct ceph_pg_pool_info, node);
if (__pool_full(pi))
return true;
}
return false;
}
static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id)
{
struct ceph_pg_pool_info *pi;
pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
if (!pi)
return false;
return __pool_full(pi);
}
/*
* Returns whether a request should be blocked from being sent
* based on the current osdmap and osd_client settings.
*/
static bool target_should_be_paused(struct ceph_osd_client *osdc,
const struct ceph_osd_request_target *t,
struct ceph_pg_pool_info *pi)
{
bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
__pool_full(pi);
WARN_ON(pi->id != t->target_oloc.pool);
return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) ||
((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) ||
(osdc->osdmap->epoch < osdc->epoch_barrier);
}
enum calc_target_result {
CALC_TARGET_NO_ACTION = 0,
CALC_TARGET_NEED_RESEND,
CALC_TARGET_POOL_DNE,
};
static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
struct ceph_osd_request_target *t,
struct ceph_connection *con,
bool any_change)
{
struct ceph_pg_pool_info *pi;
struct ceph_pg pgid, last_pgid;
struct ceph_osds up, acting;
bool force_resend = false;
bool unpaused = false;
bool legacy_change;
bool split = false;
bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE);
bool recovery_deletes = ceph_osdmap_flag(osdc,
CEPH_OSDMAP_RECOVERY_DELETES);
enum calc_target_result ct_res;
int ret;
t->epoch = osdc->osdmap->epoch;
pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
if (!pi) {
t->osd = CEPH_HOMELESS_OSD;
ct_res = CALC_TARGET_POOL_DNE;
goto out;
}
if (osdc->osdmap->epoch == pi->last_force_request_resend) {
if (t->last_force_resend < pi->last_force_request_resend) {
t->last_force_resend = pi->last_force_request_resend;
force_resend = true;
} else if (t->last_force_resend == 0) {
force_resend = true;
}
}
/* apply tiering */
ceph_oid_copy(&t->target_oid, &t->base_oid);
ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0)
t->target_oloc.pool = pi->read_tier;
if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0)
t->target_oloc.pool = pi->write_tier;
pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool);
if (!pi) {
t->osd = CEPH_HOMELESS_OSD;
ct_res = CALC_TARGET_POOL_DNE;
goto out;
}
}
ret = __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc,
&pgid);
if (ret) {
WARN_ON(ret != -ENOENT);
t->osd = CEPH_HOMELESS_OSD;
ct_res = CALC_TARGET_POOL_DNE;
goto out;
}
last_pgid.pool = pgid.pool;
last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);
ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting);
if (any_change &&
ceph_is_new_interval(&t->acting,
&acting,
&t->up,
&up,
t->size,
pi->size,
t->min_size,
pi->min_size,
t->pg_num,
pi->pg_num,
t->sort_bitwise,
sort_bitwise,
t->recovery_deletes,
recovery_deletes,
&last_pgid))
force_resend = true;
if (t->paused && !target_should_be_paused(osdc, t, pi)) {
t->paused = false;
unpaused = true;
}
legacy_change = ceph_pg_compare(&t->pgid, &pgid) ||
ceph_osds_changed(&t->acting, &acting, any_change);
if (t->pg_num)
split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num);
if (legacy_change || force_resend || split) {
t->pgid = pgid; /* struct */
ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid);
ceph_osds_copy(&t->acting, &acting);
ceph_osds_copy(&t->up, &up);
t->size = pi->size;
t->min_size = pi->min_size;
t->pg_num = pi->pg_num;
t->pg_num_mask = pi->pg_num_mask;
t->sort_bitwise = sort_bitwise;
t->recovery_deletes = recovery_deletes;
t->osd = acting.primary;
}
if (unpaused || legacy_change || force_resend ||
(split && con && CEPH_HAVE_FEATURE(con->peer_features,
RESEND_ON_SPLIT)))
ct_res = CALC_TARGET_NEED_RESEND;
else
ct_res = CALC_TARGET_NO_ACTION;
out:
dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd);
return ct_res;
}
static struct ceph_spg_mapping *alloc_spg_mapping(void)
{
struct ceph_spg_mapping *spg;
spg = kmalloc(sizeof(*spg), GFP_NOIO);
if (!spg)
return NULL;
RB_CLEAR_NODE(&spg->node);
spg->backoffs = RB_ROOT;
return spg;
}
static void free_spg_mapping(struct ceph_spg_mapping *spg)
{
WARN_ON(!RB_EMPTY_NODE(&spg->node));
WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs));
kfree(spg);
}
/*
* rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to
* ceph_pg_mapping. Used to track OSD backoffs -- a backoff [range] is
* defined only within a specific spgid; it does not pass anything to
* children on split, or to another primary.
*/
DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare,
RB_BYPTR, const struct ceph_spg *, node)
static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid)
{
return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits;
}
static void hoid_get_effective_key(const struct ceph_hobject_id *hoid,
void **pkey, size_t *pkey_len)
{
if (hoid->key_len) {
*pkey = hoid->key;
*pkey_len = hoid->key_len;
} else {
*pkey = hoid->oid;
*pkey_len = hoid->oid_len;
}
}
static int compare_names(const void *name1, size_t name1_len,
const void *name2, size_t name2_len)
{
int ret;
ret = memcmp(name1, name2, min(name1_len, name2_len));
if (!ret) {
if (name1_len < name2_len)
ret = -1;
else if (name1_len > name2_len)
ret = 1;
}
return ret;
}
static int hoid_compare(const struct ceph_hobject_id *lhs,
const struct ceph_hobject_id *rhs)
{
void *effective_key1, *effective_key2;
size_t effective_key1_len, effective_key2_len;
int ret;
if (lhs->is_max < rhs->is_max)
return -1;
if (lhs->is_max > rhs->is_max)
return 1;
if (lhs->pool < rhs->pool)
return -1;
if (lhs->pool > rhs->pool)
return 1;
if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs))
return -1;
if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs))
return 1;
ret = compare_names(lhs->nspace, lhs->nspace_len,
rhs->nspace, rhs->nspace_len);
if (ret)
return ret;
hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len);
hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len);
ret = compare_names(effective_key1, effective_key1_len,
effective_key2, effective_key2_len);
if (ret)
return ret;
ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len);
if (ret)
return ret;
if (lhs->snapid < rhs->snapid)
return -1;
if (lhs->snapid > rhs->snapid)
return 1;
return 0;
}
/*
* For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX
* compat stuff here.
*
* Assumes @hoid is zero-initialized.
*/
static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid)
{
u8 struct_v;
u32 struct_len;
int ret;
ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v,
&struct_len);
if (ret)
return ret;
if (struct_v < 4) {
pr_err("got struct_v %d < 4 of hobject_t\n", struct_v);
goto e_inval;
}
hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len,
GFP_NOIO);
if (IS_ERR(hoid->key)) {
ret = PTR_ERR(hoid->key);
hoid->key = NULL;
return ret;
}
hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len,
GFP_NOIO);
if (IS_ERR(hoid->oid)) {
ret = PTR_ERR(hoid->oid);
hoid->oid = NULL;
return ret;
}
ceph_decode_64_safe(p, end, hoid->snapid, e_inval);
ceph_decode_32_safe(p, end, hoid->hash, e_inval);
ceph_decode_8_safe(p, end, hoid->is_max, e_inval);
hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len,
GFP_NOIO);
if (IS_ERR(hoid->nspace)) {
ret = PTR_ERR(hoid->nspace);
hoid->nspace = NULL;
return ret;
}
ceph_decode_64_safe(p, end, hoid->pool, e_inval);
ceph_hoid_build_hash_cache(hoid);
return 0;
e_inval:
return -EINVAL;
}
static int hoid_encoding_size(const struct ceph_hobject_id *hoid)
{
return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */
4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len;
}
static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid)
{
ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid));
ceph_encode_string(p, end, hoid->key, hoid->key_len);
ceph_encode_string(p, end, hoid->oid, hoid->oid_len);
ceph_encode_64(p, hoid->snapid);
ceph_encode_32(p, hoid->hash);
ceph_encode_8(p, hoid->is_max);
ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len);
ceph_encode_64(p, hoid->pool);
}
static void free_hoid(struct ceph_hobject_id *hoid)
{
if (hoid) {
kfree(hoid->key);
kfree(hoid->oid);
kfree(hoid->nspace);
kfree(hoid);
}
}
static struct ceph_osd_backoff *alloc_backoff(void)
{
struct ceph_osd_backoff *backoff;
backoff = kzalloc(sizeof(*backoff), GFP_NOIO);
if (!backoff)
return NULL;
RB_CLEAR_NODE(&backoff->spg_node);
RB_CLEAR_NODE(&backoff->id_node);
return backoff;
}
static void free_backoff(struct ceph_osd_backoff *backoff)
{
WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node));
WARN_ON(!RB_EMPTY_NODE(&backoff->id_node));
free_hoid(backoff->begin);
free_hoid(backoff->end);
kfree(backoff);
}
/*
* Within a specific spgid, backoffs are managed by ->begin hoid.
*/
DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare,
RB_BYVAL, spg_node);
static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root,
const struct ceph_hobject_id *hoid)
{
struct rb_node *n = root->rb_node;
while (n) {
struct ceph_osd_backoff *cur =
rb_entry(n, struct ceph_osd_backoff, spg_node);
int cmp;
cmp = hoid_compare(hoid, cur->begin);
if (cmp < 0) {
n = n->rb_left;
} else if (cmp > 0) {
if (hoid_compare(hoid, cur->end) < 0)
return cur;
n = n->rb_right;
} else {
return cur;
}
}
return NULL;
}
/*
* Each backoff has a unique id within its OSD session.
*/
DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node)
static void clear_backoffs(struct ceph_osd *osd)
{
while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) {
struct ceph_spg_mapping *spg =
rb_entry(rb_first(&osd->o_backoff_mappings),
struct ceph_spg_mapping, node);
while (!RB_EMPTY_ROOT(&spg->backoffs)) {
struct ceph_osd_backoff *backoff =
rb_entry(rb_first(&spg->backoffs),
struct ceph_osd_backoff, spg_node);
erase_backoff(&spg->backoffs, backoff);
erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
free_backoff(backoff);
}
erase_spg_mapping(&osd->o_backoff_mappings, spg);
free_spg_mapping(spg);
}
}
/*
* Set up a temporary, non-owning view into @t.
*/
static void hoid_fill_from_target(struct ceph_hobject_id *hoid,
const struct ceph_osd_request_target *t)
{
hoid->key = NULL;
hoid->key_len = 0;
hoid->oid = t->target_oid.name;
hoid->oid_len = t->target_oid.name_len;
hoid->snapid = CEPH_NOSNAP;
hoid->hash = t->pgid.seed;
hoid->is_max = false;
if (t->target_oloc.pool_ns) {
hoid->nspace = t->target_oloc.pool_ns->str;
hoid->nspace_len = t->target_oloc.pool_ns->len;
} else {
hoid->nspace = NULL;
hoid->nspace_len = 0;
}
hoid->pool = t->target_oloc.pool;
ceph_hoid_build_hash_cache(hoid);
}
static bool should_plug_request(struct ceph_osd_request *req)
{
struct ceph_osd *osd = req->r_osd;
struct ceph_spg_mapping *spg;
struct ceph_osd_backoff *backoff;
struct ceph_hobject_id hoid;
spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid);
if (!spg)
return false;
hoid_fill_from_target(&hoid, &req->r_t);
backoff = lookup_containing_backoff(&spg->backoffs, &hoid);
if (!backoff)
return false;
dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n",
__func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool,
backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id);
return true;
}
static void setup_request_data(struct ceph_osd_request *req,
struct ceph_msg *msg)
{
u32 data_len = 0;
int i;
if (!list_empty(&msg->data))
return;
WARN_ON(msg->data_length);
for (i = 0; i < req->r_num_ops; i++) {
struct ceph_osd_req_op *op = &req->r_ops[i];
switch (op->op) {
/* request */
case CEPH_OSD_OP_WRITE:
case CEPH_OSD_OP_WRITEFULL:
WARN_ON(op->indata_len != op->extent.length);
ceph_osdc_msg_data_add(msg, &op->extent.osd_data);
break;
case CEPH_OSD_OP_SETXATTR:
case CEPH_OSD_OP_CMPXATTR:
WARN_ON(op->indata_len != op->xattr.name_len +
op->xattr.value_len);
ceph_osdc_msg_data_add(msg, &op->xattr.osd_data);
break;
case CEPH_OSD_OP_NOTIFY_ACK:
ceph_osdc_msg_data_add(msg,
&op->notify_ack.request_data);
break;
/* reply */
case CEPH_OSD_OP_STAT:
ceph_osdc_msg_data_add(req->r_reply,
&op->raw_data_in);
break;
case CEPH_OSD_OP_READ:
ceph_osdc_msg_data_add(req->r_reply,
&op->extent.osd_data);
break;
case CEPH_OSD_OP_LIST_WATCHERS:
ceph_osdc_msg_data_add(req->r_reply,
&op->list_watchers.response_data);
break;
/* both */
case CEPH_OSD_OP_CALL:
WARN_ON(op->indata_len != op->cls.class_len +
op->cls.method_len +
op->cls.indata_len);
ceph_osdc_msg_data_add(msg, &op->cls.request_info);
/* optional, can be NONE */
ceph_osdc_msg_data_add(msg, &op->cls.request_data);
/* optional, can be NONE */
ceph_osdc_msg_data_add(req->r_reply,
&op->cls.response_data);
break;
case CEPH_OSD_OP_NOTIFY:
ceph_osdc_msg_data_add(msg,
&op->notify.request_data);
ceph_osdc_msg_data_add(req->r_reply,
&op->notify.response_data);
break;
}
data_len += op->indata_len;
}
WARN_ON(data_len != msg->data_length);
}
static void encode_pgid(void **p, const struct ceph_pg *pgid)
{
ceph_encode_8(p, 1);
ceph_encode_64(p, pgid->pool);
ceph_encode_32(p, pgid->seed);
ceph_encode_32(p, -1); /* preferred */
}
static void encode_spgid(void **p, const struct ceph_spg *spgid)
{
ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1);
encode_pgid(p, &spgid->pgid);
ceph_encode_8(p, spgid->shard);
}
static void encode_oloc(void **p, void *end,
const struct ceph_object_locator *oloc)
{
ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc));
ceph_encode_64(p, oloc->pool);
ceph_encode_32(p, -1); /* preferred */
ceph_encode_32(p, 0); /* key len */
if (oloc->pool_ns)
ceph_encode_string(p, end, oloc->pool_ns->str,
oloc->pool_ns->len);
else
ceph_encode_32(p, 0);
}
static void encode_request_partial(struct ceph_osd_request *req,
struct ceph_msg *msg)
{
void *p = msg->front.iov_base;
void *const end = p + msg->front_alloc_len;
u32 data_len = 0;
int i;
if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
/* snapshots aren't writeable */
WARN_ON(req->r_snapid != CEPH_NOSNAP);
} else {
WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
req->r_data_offset || req->r_snapc);
}
setup_request_data(req, msg);
encode_spgid(&p, &req->r_t.spgid); /* actual spg */
ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */
ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
ceph_encode_32(&p, req->r_flags);
/* reqid */
ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid));
memset(p, 0, sizeof(struct ceph_osd_reqid));
p += sizeof(struct ceph_osd_reqid);
/* trace */
memset(p, 0, sizeof(struct ceph_blkin_trace_info));
p += sizeof(struct ceph_blkin_trace_info);
ceph_encode_32(&p, 0); /* client_inc, always 0 */
ceph_encode_timespec(p, &req->r_mtime);
p += sizeof(struct ceph_timespec);
encode_oloc(&p, end, &req->r_t.target_oloc);
ceph_encode_string(&p, end, req->r_t.target_oid.name,
req->r_t.target_oid.name_len);
/* ops, can imply data */
ceph_encode_16(&p, req->r_num_ops);
for (i = 0; i < req->r_num_ops; i++) {
data_len += osd_req_encode_op(p, &req->r_ops[i]);
p += sizeof(struct ceph_osd_op);
}
ceph_encode_64(&p, req->r_snapid); /* snapid */
if (req->r_snapc) {
ceph_encode_64(&p, req->r_snapc->seq);
ceph_encode_32(&p, req->r_snapc->num_snaps);
for (i = 0; i < req->r_snapc->num_snaps; i++)
ceph_encode_64(&p, req->r_snapc->snaps[i]);
} else {
ceph_encode_64(&p, 0); /* snap_seq */
ceph_encode_32(&p, 0); /* snaps len */
}
ceph_encode_32(&p, req->r_attempts); /* retry_attempt */
BUG_ON(p > end - 8); /* space for features */
msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */
/* front_len is finalized in encode_request_finish() */
msg->front.iov_len = p - msg->front.iov_base;
msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
msg->hdr.data_len = cpu_to_le32(data_len);
/*
* The header "data_off" is a hint to the receiver allowing it
* to align received data into its buffers such that there's no
* need to re-copy it before writing it to disk (direct I/O).
*/
msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg,
req->r_t.target_oid.name, req->r_t.target_oid.name_len);
}
static void encode_request_finish(struct ceph_msg *msg)
{
void *p = msg->front.iov_base;
void *const partial_end = p + msg->front.iov_len;
void *const end = p + msg->front_alloc_len;
if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) {
/* luminous OSD -- encode features and be done */
p = partial_end;
ceph_encode_64(&p, msg->con->peer_features);
} else {
struct {
char spgid[CEPH_ENCODING_START_BLK_LEN +
CEPH_PGID_ENCODING_LEN + 1];
__le32 hash;
__le32 epoch;
__le32 flags;
char reqid[CEPH_ENCODING_START_BLK_LEN +
sizeof(struct ceph_osd_reqid)];
char trace[sizeof(struct ceph_blkin_trace_info)];
__le32 client_inc;
struct ceph_timespec mtime;
} __packed head;
struct ceph_pg pgid;
void *oloc, *oid, *tail;
int oloc_len, oid_len, tail_len;
int len;
/*
* Pre-luminous OSD -- reencode v8 into v4 using @head
* as a temporary buffer. Encode the raw PG; the rest
* is just a matter of moving oloc, oid and tail blobs
* around.
*/
memcpy(&head, p, sizeof(head));
p += sizeof(head);
oloc = p;
p += CEPH_ENCODING_START_BLK_LEN;
pgid.pool = ceph_decode_64(&p);
p += 4 + 4; /* preferred, key len */
len = ceph_decode_32(&p);
p += len; /* nspace */
oloc_len = p - oloc;
oid = p;
len = ceph_decode_32(&p);
p += len;
oid_len = p - oid;
tail = p;
tail_len = partial_end - p;
p = msg->front.iov_base;
ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc));
ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch));
ceph_encode_copy(&p, &head.flags, sizeof(head.flags));
ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime));
/* reassert_version */
memset(p, 0, sizeof(struct ceph_eversion));
p += sizeof(struct ceph_eversion);
BUG_ON(p >= oloc);
memmove(p, oloc, oloc_len);
p += oloc_len;
pgid.seed = le32_to_cpu(head.hash);
encode_pgid(&p, &pgid); /* raw pg */
BUG_ON(p >= oid);
memmove(p, oid, oid_len);
p += oid_len;
/* tail -- ops, snapid, snapc, retry_attempt */
BUG_ON(p >= tail);
memmove(p, tail, tail_len);
p += tail_len;
msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
}
BUG_ON(p > end);
msg->front.iov_len = p - msg->front.iov_base;
msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg,
le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len),
le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len),
le16_to_cpu(msg->hdr.version));
}
/*
* @req has to be assigned a tid and registered.
*/
static void send_request(struct ceph_osd_request *req)
{
struct ceph_osd *osd = req->r_osd;
verify_osd_locked(osd);
WARN_ON(osd->o_osd != req->r_t.osd);
/* backoff? */
if (should_plug_request(req))
return;
/*
* We may have a previously queued request message hanging
* around. Cancel it to avoid corrupting the msgr.
*/
if (req->r_sent)
ceph_msg_revoke(req->r_request);
req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
if (req->r_attempts)
req->r_flags |= CEPH_OSD_FLAG_RETRY;
else
WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);
encode_request_partial(req, req->r_request);
dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d e%u flags 0x%x attempt %d\n",
__func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed,
req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags,
req->r_attempts);
req->r_t.paused = false;
req->r_stamp = jiffies;
req->r_attempts++;
req->r_sent = osd->o_incarnation;
req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
}
static void maybe_request_map(struct ceph_osd_client *osdc)
{
bool continuous = false;
verify_osdc_locked(osdc);
WARN_ON(!osdc->osdmap->epoch);
if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) ||
ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
dout("%s osdc %p continuous\n", __func__, osdc);
continuous = true;
} else {
dout("%s osdc %p onetime\n", __func__, osdc);
}
if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
osdc->osdmap->epoch + 1, continuous))
ceph_monc_renew_subs(&osdc->client->monc);
}
static void complete_request(struct ceph_osd_request *req, int err);
static void send_map_check(struct ceph_osd_request *req);
static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
{
struct ceph_osd_client *osdc = req->r_osdc;
struct ceph_osd *osd;
enum calc_target_result ct_res;
bool need_send = false;
bool promoted = false;
bool need_abort = false;
WARN_ON(req->r_tid);
dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
again:
ct_res = calc_target(osdc, &req->r_t, NULL, false);
if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
goto promote;
osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
if (IS_ERR(osd)) {
WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
goto promote;
}
if (osdc->osdmap->epoch < osdc->epoch_barrier) {
dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch,
osdc->epoch_barrier);
req->r_t.paused = true;
maybe_request_map(osdc);
} else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
dout("req %p pausewr\n", req);
req->r_t.paused = true;
maybe_request_map(osdc);
} else if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
dout("req %p pauserd\n", req);
req->r_t.paused = true;
maybe_request_map(osdc);
} else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
!(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY |
CEPH_OSD_FLAG_FULL_FORCE)) &&
(ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
pool_full(osdc, req->r_t.base_oloc.pool))) {
dout("req %p full/pool_full\n", req);
pr_warn_ratelimited("FULL or reached pool quota\n");
req->r_t.paused = true;
maybe_request_map(osdc);
if (req->r_abort_on_full)
need_abort = true;
} else if (!osd_homeless(osd)) {
need_send = true;
} else {
maybe_request_map(osdc);
}
mutex_lock(&osd->lock);
/*
* Assign the tid atomically with send_request() to protect
* multiple writes to the same object from racing with each
* other, resulting in out of order ops on the OSDs.
*/
req->r_tid = atomic64_inc_return(&osdc->last_tid);
link_request(osd, req);
if (need_send)
send_request(req);
else if (need_abort)
complete_request(req, -ENOSPC);
mutex_unlock(&osd->lock);
if (ct_res == CALC_TARGET_POOL_DNE)
send_map_check(req);
if (promoted)
downgrade_write(&osdc->lock);
return;
promote:
up_read(&osdc->lock);
down_write(&osdc->lock);
wrlocked = true;
promoted = true;
goto again;
}
static void account_request(struct ceph_osd_request *req)
{
WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK));
WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE)));
req->r_flags |= CEPH_OSD_FLAG_ONDISK;
atomic_inc(&req->r_osdc->num_requests);
req->r_start_stamp = jiffies;
}
static void submit_request(struct ceph_osd_request *req, bool wrlocked)
{
ceph_osdc_get_request(req);
account_request(req);
__submit_request(req, wrlocked);
}
static void finish_request(struct ceph_osd_request *req)
{
struct ceph_osd_client *osdc = req->r_osdc;
WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
if (req->r_osd)
unlink_request(req->r_osd, req);
atomic_dec(&osdc->num_requests);
/*
* If an OSD has failed or returned and a request has been sent
* twice, it's possible to get a reply and end up here while the
* request message is queued for delivery. We will ignore the
* reply, so not a big deal, but better to try and catch it.
*/
ceph_msg_revoke(req->r_request);
ceph_msg_revoke_incoming(req->r_reply);
}
static void __complete_request(struct ceph_osd_request *req)
{
if (req->r_callback) {
dout("%s req %p tid %llu cb %pf result %d\n", __func__, req,
req->r_tid, req->r_callback, req->r_result);
req->r_callback(req);
}
}
/*
* This is open-coded in handle_reply().
*/
static void complete_request(struct ceph_osd_request *req, int err)
{
dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
req->r_result = err;
finish_request(req);
__complete_request(req);
complete_all(&req->r_completion);
ceph_osdc_put_request(req);
}
static void cancel_map_check(struct ceph_osd_request *req)
{
struct ceph_osd_client *osdc = req->r_osdc;
struct ceph_osd_request *lookup_req;
verify_osdc_wrlocked(osdc);
lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
if (!lookup_req)
return;
WARN_ON(lookup_req != req);
erase_request_mc(&osdc->map_checks, req);
ceph_osdc_put_request(req);
}
static void cancel_request(struct ceph_osd_request *req)
{
dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
cancel_map_check(req);
finish_request(req);
complete_all(&req->r_completion);
ceph_osdc_put_request(req);
}
static void abort_request(struct ceph_osd_request *req, int err)
{
dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
cancel_map_check(req);
complete_request(req, err);
}
static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
{
if (likely(eb > osdc->epoch_barrier)) {
dout("updating epoch_barrier from %u to %u\n",
osdc->epoch_barrier, eb);
osdc->epoch_barrier = eb;
/* Request map if we're not to the barrier yet */
if (eb > osdc->osdmap->epoch)
maybe_request_map(osdc);
}
}
void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
{
down_read(&osdc->lock);
if (unlikely(eb > osdc->epoch_barrier)) {
up_read(&osdc->lock);
down_write(&osdc->lock);
update_epoch_barrier(osdc, eb);
up_write(&osdc->lock);
} else {
up_read(&osdc->lock);
}
}
EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier);
/*
* Drop all pending requests that are stalled waiting on a full condition to
* clear, and complete them with ENOSPC as the return code. Set the
* osdc->epoch_barrier to the latest map epoch that we've seen if any were
* cancelled.
*/
static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc)
{
struct rb_node *n;
bool victims = false;
dout("enter abort_on_full\n");
if (!ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) && !have_pool_full(osdc))
goto out;
/* Scan list and see if there is anything to abort */
for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
struct rb_node *m;
m = rb_first(&osd->o_requests);
while (m) {
struct ceph_osd_request *req = rb_entry(m,
struct ceph_osd_request, r_node);
m = rb_next(m);
if (req->r_abort_on_full) {
victims = true;
break;
}
}
if (victims)
break;
}
if (!victims)
goto out;
/*
* Update the barrier to current epoch if it's behind that point,
* since we know we have some calls to be aborted in the tree.
*/
update_epoch_barrier(osdc, osdc->osdmap->epoch);
for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
struct rb_node *m;
m = rb_first(&osd->o_requests);
while (m) {
struct ceph_osd_request *req = rb_entry(m,
struct ceph_osd_request, r_node);
m = rb_next(m);
if (req->r_abort_on_full &&
(ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
pool_full(osdc, req->r_t.target_oloc.pool)))
abort_request(req, -ENOSPC);
}
}
out:
dout("return abort_on_full barrier=%u\n", osdc->epoch_barrier);
}
static void check_pool_dne(struct ceph_osd_request *req)
{
struct ceph_osd_client *osdc = req->r_osdc;
struct ceph_osdmap *map = osdc->osdmap;
verify_osdc_wrlocked(osdc);
WARN_ON(!map->epoch);
if (req->r_attempts) {
/*
* We sent a request earlier, which means that
* previously the pool existed, and now it does not
* (i.e., it was deleted).
*/
req->r_map_dne_bound = map->epoch;
dout("%s req %p tid %llu pool disappeared\n", __func__, req,
req->r_tid);
} else {
dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__,
req, req->r_tid, req->r_map_dne_bound, map->epoch);
}
if (req->r_map_dne_bound) {
if (map->epoch >= req->r_map_dne_bound) {
/* we had a new enough map */
pr_info_ratelimited("tid %llu pool does not exist\n",
req->r_tid);
complete_request(req, -ENOENT);
}
} else {
send_map_check(req);
}
}
static void map_check_cb(struct ceph_mon_generic_request *greq)
{
struct ceph_osd_client *osdc = &greq->monc->client->osdc;
struct ceph_osd_request *req;
u64 tid = greq->private_data;
WARN_ON(greq->result || !greq->u.newest);
down_write(&osdc->lock);
req = lookup_request_mc(&osdc->map_checks, tid);
if (!req) {
dout("%s tid %llu dne\n", __func__, tid);
goto out_unlock;
}
dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__,
req, req->r_tid, req->r_map_dne_bound, greq->u.newest);
if (!req->r_map_dne_bound)
req->r_map_dne_bound = greq->u.newest;
erase_request_mc(&osdc->map_checks, req);
check_pool_dne(req);
ceph_osdc_put_request(req);
out_unlock:
up_write(&osdc->lock);
}
static void send_map_check(struct ceph_osd_request *req)
{
struct ceph_osd_client *osdc = req->r_osdc;
struct ceph_osd_request *lookup_req;
int ret;
verify_osdc_wrlocked(osdc);
lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
if (lookup_req) {
WARN_ON(lookup_req != req);
return;
}
ceph_osdc_get_request(req);
insert_request_mc(&osdc->map_checks, req);
ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
map_check_cb, req->r_tid);
WARN_ON(ret);
}
/*
* lingering requests, watch/notify v2 infrastructure
*/
static void linger_release(struct kref *kref)
{
struct ceph_osd_linger_request *lreq =
container_of(kref, struct ceph_osd_linger_request, kref);
dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq,
lreq->reg_req, lreq->ping_req);
WARN_ON(!RB_EMPTY_NODE(&lreq->node));
WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node));
WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
WARN_ON(!list_empty(&lreq->scan_item));
WARN_ON(!list_empty(&lreq->pending_lworks));
WARN_ON(lreq->osd);
if (lreq->reg_req)
ceph_osdc_put_request(lreq->reg_req);
if (lreq->ping_req)
ceph_osdc_put_request(lreq->ping_req);
target_destroy(&lreq->t);
kfree(lreq);
}
static void linger_put(struct ceph_osd_linger_request *lreq)
{
if (lreq)
kref_put(&lreq->kref, linger_release);
}
static struct ceph_osd_linger_request *
linger_get(struct ceph_osd_linger_request *lreq)
{
kref_get(&lreq->kref);
return lreq;
}
static struct ceph_osd_linger_request *
linger_alloc(struct ceph_osd_client *osdc)
{
struct ceph_osd_linger_request *lreq;
lreq = kzalloc(sizeof(*lreq), GFP_NOIO);
if (!lreq)
return NULL;
kref_init(&lreq->kref);
mutex_init(&lreq->lock);
RB_CLEAR_NODE(&lreq->node);
RB_CLEAR_NODE(&lreq->osdc_node);
RB_CLEAR_NODE(&lreq->mc_node);
INIT_LIST_HEAD(&lreq->scan_item);
INIT_LIST_HEAD(&lreq->pending_lworks);
init_completion(&lreq->reg_commit_wait);
init_completion(&lreq->notify_finish_wait);
lreq->osdc = osdc;
target_init(&lreq->t);
dout("%s lreq %p\n", __func__, lreq);
return lreq;
}
DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node)
DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node)
DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
/*
* Create linger request <-> OSD session relation.
*
* @lreq has to be registered, @osd may be homeless.
*/
static void link_linger(struct ceph_osd *osd,
struct ceph_osd_linger_request *lreq)
{
verify_osd_locked(osd);
WARN_ON(!lreq->linger_id || lreq->osd);
dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
osd->o_osd, lreq, lreq->linger_id);
if (!osd_homeless(osd))
__remove_osd_from_lru(osd);
else
atomic_inc(&osd->o_osdc->num_homeless);
get_osd(osd);
insert_linger(&osd->o_linger_requests, lreq);
lreq->osd = osd;
}
static void unlink_linger(struct ceph_osd *osd,
struct ceph_osd_linger_request *lreq)
{
verify_osd_locked(osd);
WARN_ON(lreq->osd != osd);
dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
osd->o_osd, lreq, lreq->linger_id);
lreq->osd = NULL;
erase_linger(&osd->o_linger_requests, lreq);
put_osd(osd);
if (!osd_homeless(osd))
maybe_move_osd_to_lru(osd);
else
atomic_dec(&osd->o_osdc->num_homeless);
}
static bool __linger_registered(struct ceph_osd_linger_request *lreq)
{
verify_osdc_locked(lreq->osdc);
return !RB_EMPTY_NODE(&lreq->osdc_node);
}
static bool linger_registered(struct ceph_osd_linger_request *lreq)
{
struct ceph_osd_client *osdc = lreq->osdc;
bool registered;
down_read(&osdc->lock);
registered = __linger_registered(lreq);
up_read(&osdc->lock);
return registered;
}
static void linger_register(struct ceph_osd_linger_request *lreq)
{
struct ceph_osd_client *osdc = lreq->osdc;
verify_osdc_wrlocked(osdc);
WARN_ON(lreq->linger_id);
linger_get(lreq);
lreq->linger_id = ++osdc->last_linger_id;
insert_linger_osdc(&osdc->linger_requests, lreq);
}
static void linger_unregister(struct ceph_osd_linger_request *lreq)
{
struct ceph_osd_client *osdc = lreq->osdc;
verify_osdc_wrlocked(osdc);
erase_linger_osdc(&osdc->linger_requests, lreq);
linger_put(lreq);
}
static void cancel_linger_request(struct ceph_osd_request *req)
{
struct ceph_osd_linger_request *lreq = req->r_priv;
WARN_ON(!req->r_linger);
cancel_request(req);
linger_put(lreq);
}
struct linger_work {
struct work_struct work;
struct ceph_osd_linger_request *lreq;
struct list_head pending_item;
unsigned long queued_stamp;
union {
struct {
u64 notify_id;
u64 notifier_id;
void *payload; /* points into @msg front */
size_t payload_len;
struct ceph_msg *msg; /* for ceph_msg_put() */
} notify;
struct {
int err;
} error;
};
};
static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq,
work_func_t workfn)
{
struct linger_work *lwork;
lwork = kzalloc(sizeof(*lwork), GFP_NOIO);
if (!lwork)
return NULL;
INIT_WORK(&lwork->work, workfn);
INIT_LIST_HEAD(&lwork->pending_item);
lwork->lreq = linger_get(lreq);
return lwork;
}
static void lwork_free(struct linger_work *lwork)
{
struct ceph_osd_linger_request *lreq = lwork->lreq;
mutex_lock(&lreq->lock);
list_del(&lwork->pending_item);
mutex_unlock(&lreq->lock);
linger_put(lreq);
kfree(lwork);
}
static void lwork_queue(struct linger_work *lwork)
{
struct ceph_osd_linger_request *lreq = lwork->lreq;
struct ceph_osd_client *osdc = lreq->osdc;
verify_lreq_locked(lreq);
WARN_ON(!list_empty(&lwork->pending_item));
lwork->queued_stamp = jiffies;
list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
queue_work(osdc->notify_wq, &lwork->work);
}
static void do_watch_notify(struct work_struct *w)
{
struct linger_work *lwork = container_of(w, struct linger_work, work);
struct ceph_osd_linger_request *lreq = lwork->lreq;
if (!linger_registered(lreq)) {
dout("%s lreq %p not registered\n", __func__, lreq);
goto out;
}
WARN_ON(!lreq->is_watch);
dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n",
__func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id,
lwork->notify.payload_len);
lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id,
lwork->notify.notifier_id, lwork->notify.payload,
lwork->notify.payload_len);
out:
ceph_msg_put(lwork->notify.msg);
lwork_free(lwork);
}
static void do_watch_error(struct work_struct *w)
{
struct linger_work *lwork = container_of(w, struct linger_work, work);
struct ceph_osd_linger_request *lreq = lwork->lreq;
if (!linger_registered(lreq)) {
dout("%s lreq %p not registered\n", __func__, lreq);
goto out;
}
dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err);
lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err);
out:
lwork_free(lwork);
}
static void queue_watch_error(struct ceph_osd_linger_request *lreq)
{
struct linger_work *lwork;
lwork = lwork_alloc(lreq, do_watch_error);
if (!lwork) {
pr_err("failed to allocate error-lwork\n");
return;
}
lwork->error.err = lreq->last_error;
lwork_queue(lwork);
}
static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq,
int result)
{
if (!completion_done(&lreq->reg_commit_wait)) {
lreq->reg_commit_error = (result <= 0 ? result : 0);
complete_all(&lreq->reg_commit_wait);
}
}
static void linger_commit_cb(struct ceph_osd_request *req)
{
struct ceph_osd_linger_request *lreq = req->r_priv;
mutex_lock(&lreq->lock);
dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq,
lreq->linger_id, req->r_result);
linger_reg_commit_complete(lreq, req->r_result);
lreq->committed = true;
if (!lreq->is_watch) {
struct ceph_osd_data *osd_data =
osd_req_op_data(req, 0, notify, response_data);
void *p = page_address(osd_data->pages[0]);
WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY ||
osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
/* make note of the notify_id */
if (req->r_ops[0].outdata_len >= sizeof(u64)) {
lreq->notify_id = ceph_decode_64(&p);
dout("lreq %p notify_id %llu\n", lreq,
lreq->notify_id);
} else {
dout("lreq %p no notify_id\n", lreq);
}
}
mutex_unlock(&lreq->lock);
linger_put(lreq);
}
static int normalize_watch_error(int err)
{
/*
* Translate ENOENT -> ENOTCONN so that a delete->disconnection
* notification and a failure to reconnect because we raced with
* the delete appear the same to the user.
*/
if (err == -ENOENT)
err = -ENOTCONN;
return err;
}
static void linger_reconnect_cb(struct ceph_osd_request *req)
{
struct ceph_osd_linger_request *lreq = req->r_priv;
mutex_lock(&lreq->lock);
dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__,
lreq, lreq->linger_id, req->r_result, lreq->last_error);
if (req->r_result < 0) {
if (!lreq->last_error) {
lreq->last_error = normalize_watch_error(req->r_result);
queue_watch_error(lreq);
}
}
mutex_unlock(&lreq->lock);
linger_put(lreq);
}
static void send_linger(struct ceph_osd_linger_request *lreq)
{
struct ceph_osd_request *req = lreq->reg_req;
struct ceph_osd_req_op *op = &req->r_ops[0];
verify_osdc_wrlocked(req->r_osdc);
dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
if (req->r_osd)
cancel_linger_request(req);
request_reinit(req);
ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
req->r_flags = lreq->t.flags;
req->r_mtime = lreq->mtime;
mutex_lock(&lreq->lock);
if (lreq->is_watch && lreq->committed) {
WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
op->watch.cookie != lreq->linger_id);
op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT;
op->watch.gen = ++lreq->register_gen;
dout("lreq %p reconnect register_gen %u\n", lreq,
op->watch.gen);
req->r_callback = linger_reconnect_cb;
} else {
if (!lreq->is_watch)
lreq->notify_id = 0;
else
WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH);
dout("lreq %p register\n", lreq);
req->r_callback = linger_commit_cb;
}
mutex_unlock(&lreq->lock);
req->r_priv = linger_get(lreq);
req->r_linger = true;
submit_request(req, true);
}
static void linger_ping_cb(struct ceph_osd_request *req)
{
struct ceph_osd_linger_request *lreq = req->r_priv;
mutex_lock(&lreq->lock);
dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n",
__func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent,
lreq->last_error);
if (lreq->register_gen == req->r_ops[0].watch.gen) {
if (!req->r_result) {
lreq->watch_valid_thru = lreq->ping_sent;
} else if (!lreq->last_error) {
lreq->last_error = normalize_watch_error(req->r_result);
queue_watch_error(lreq);
}
} else {
dout("lreq %p register_gen %u ignoring old pong %u\n", lreq,
lreq->register_gen, req->r_ops[0].watch.gen);
}
mutex_unlock(&lreq->lock);
linger_put(lreq);
}
static void send_linger_ping(struct ceph_osd_linger_request *lreq)
{
struct ceph_osd_client *osdc = lreq->osdc;
struct ceph_osd_request *req = lreq->ping_req;
struct ceph_osd_req_op *op = &req->r_ops[0];
if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
dout("%s PAUSERD\n", __func__);
return;
}
lreq->ping_sent = jiffies;
dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n",
__func__, lreq, lreq->linger_id, lreq->ping_sent,
lreq->register_gen);
if (req->r_osd)
cancel_linger_request(req);
request_reinit(req);
target_copy(&req->r_t, &lreq->t);
WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
op->watch.cookie != lreq->linger_id ||
op->watch.op != CEPH_OSD_WATCH_OP_PING);
op->watch.gen = lreq->register_gen;
req->r_callback = linger_ping_cb;
req->r_priv = linger_get(lreq);
req->r_linger = true;
ceph_osdc_get_request(req);
account_request(req);
req->r_tid = atomic64_inc_return(&osdc->last_tid);
link_request(lreq->osd, req);
send_request(req);
}
static void linger_submit(struct ceph_osd_linger_request *lreq)
{
struct ceph_osd_client *osdc = lreq->osdc;
struct ceph_osd *osd;
calc_target(osdc, &lreq->t, NULL, false);
osd = lookup_create_osd(osdc, lreq->t.osd, true);
link_linger(osd, lreq);
send_linger(lreq);
}
static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq)
{
struct ceph_osd_client *osdc = lreq->osdc;
struct ceph_osd_linger_request *lookup_lreq;
verify_osdc_wrlocked(osdc);
lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
lreq->linger_id);
if (!lookup_lreq)
return;
WARN_ON(lookup_lreq != lreq);
erase_linger_mc(&osdc->linger_map_checks, lreq);
linger_put(lreq);
}
/*
* @lreq has to be both registered and linked.
*/
static void __linger_cancel(struct ceph_osd_linger_request *lreq)
{
if (lreq->is_watch && lreq->ping_req->r_osd)
cancel_linger_request(lreq->ping_req);
if (lreq->reg_req->r_osd)
cancel_linger_request(lreq->reg_req);
cancel_linger_map_check(lreq);
unlink_linger(lreq->osd, lreq);
linger_unregister(lreq);
}
static void linger_cancel(struct ceph_osd_linger_request *lreq)
{
struct ceph_osd_client *osdc = lreq->osdc;
down_write(&osdc->lock);
if (__linger_registered(lreq))
__linger_cancel(lreq);
up_write(&osdc->lock);
}
static void send_linger_map_check(struct ceph_osd_linger_request *lreq);
static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq)
{
struct ceph_osd_client *osdc = lreq->osdc;
struct ceph_osdmap *map = osdc->osdmap;
verify_osdc_wrlocked(osdc);
WARN_ON(!map->epoch);
if (lreq->register_gen) {
lreq->map_dne_bound = map->epoch;
dout("%s lreq %p linger_id %llu pool disappeared\n", __func__,
lreq, lreq->linger_id);
} else {
dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n",
__func__, lreq, lreq->linger_id, lreq->map_dne_bound,
map->epoch);
}
if (lreq->map_dne_bound) {
if (map->epoch >= lreq->map_dne_bound) {
/* we had a new enough map */
pr_info("linger_id %llu pool does not exist\n",
lreq->linger_id);
linger_reg_commit_complete(lreq, -ENOENT);
__linger_cancel(lreq);
}
} else {
send_linger_map_check(lreq);
}
}
static void linger_map_check_cb(struct ceph_mon_generic_request *greq)
{
struct ceph_osd_client *osdc = &greq->monc->client->osdc;
struct ceph_osd_linger_request *lreq;
u64 linger_id = greq->private_data;
WARN_ON(greq->result || !greq->u.newest);
down_write(&osdc->lock);
lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id);
if (!lreq) {
dout("%s linger_id %llu dne\n", __func__, linger_id);
goto out_unlock;
}
dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n",
__func__, lreq, lreq->linger_id, lreq->map_dne_bound,
greq->u.newest);
if (!lreq->map_dne_bound)
lreq->map_dne_bound = greq->u.newest;
erase_linger_mc(&osdc->linger_map_checks, lreq);
check_linger_pool_dne(lreq);
linger_put(lreq);
out_unlock:
up_write(&osdc->lock);
}
static void send_linger_map_check(struct ceph_osd_linger_request *lreq)
{
struct ceph_osd_client *osdc = lreq->osdc;
struct ceph_osd_linger_request *lookup_lreq;
int ret;
verify_osdc_wrlocked(osdc);
lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
lreq->linger_id);
if (lookup_lreq) {
WARN_ON(lookup_lreq != lreq);
return;
}
linger_get(lreq);
insert_linger_mc(&osdc->linger_map_checks, lreq);
ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
linger_map_check_cb, lreq->linger_id);
WARN_ON(ret);
}
static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq)
{
int ret;
dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
ret = wait_for_completion_interruptible(&lreq->reg_commit_wait);
return ret ?: lreq->reg_commit_error;
}
static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq)
{
int ret;
dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
ret = wait_for_completion_interruptible(&lreq->notify_finish_wait);
return ret ?: lreq->notify_finish_error;
}
/*
* Timeout callback, called every N seconds. When 1 or more OSD
* requests has been active for more than N seconds, we send a keepalive
* (tag + timestamp) to its OSD to ensure any communications channel
* reset is detected.
*/
static void handle_timeout(struct work_struct *work)
{
struct ceph_osd_client *osdc =
container_of(work, struct ceph_osd_client, timeout_work.work);
struct ceph_options *opts = osdc->client->options;
unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout;
LIST_HEAD(slow_osds);
struct rb_node *n, *p;
dout("%s osdc %p\n", __func__, osdc);
down_write(&osdc->lock);
/*
* ping osds that are a bit slow. this ensures that if there
* is a break in the TCP connection we will notice, and reopen
* a connection with that osd (from the fault callback).
*/
for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
bool found = false;
for (p = rb_first(&osd->o_requests); p; ) {
struct ceph_osd_request *req =
rb_entry(p, struct ceph_osd_request, r_node);
p = rb_next(p); /* abort_request() */
if (time_before(req->r_stamp, cutoff)) {
dout(" req %p tid %llu on osd%d is laggy\n",
req, req->r_tid, osd->o_osd);
found = true;
}
if (opts->osd_request_timeout &&
time_before(req->r_start_stamp, expiry_cutoff)) {
pr_err_ratelimited("tid %llu on osd%d timeout\n",
req->r_tid, osd->o_osd);
abort_request(req, -ETIMEDOUT);
}
}
for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) {
struct ceph_osd_linger_request *lreq =
rb_entry(p, struct ceph_osd_linger_request, node);
dout(" lreq %p linger_id %llu is served by osd%d\n",
lreq, lreq->linger_id, osd->o_osd);
found = true;
mutex_lock(&lreq->lock);
if (lreq->is_watch && lreq->committed && !lreq->last_error)
send_linger_ping(lreq);
mutex_unlock(&lreq->lock);
}
if (found)
list_move_tail(&osd->o_keepalive_item, &slow_osds);
}
if (opts->osd_request_timeout) {
for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
struct ceph_osd_request *req =
rb_entry(p, struct ceph_osd_request, r_node);
p = rb_next(p); /* abort_request() */
if (time_before(req->r_start_stamp, expiry_cutoff)) {
pr_err_ratelimited("tid %llu on osd%d timeout\n",
req->r_tid, osdc->homeless_osd.o_osd);
abort_request(req, -ETIMEDOUT);
}
}
}
if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds))
maybe_request_map(osdc);
while (!list_empty(&slow_osds)) {
struct ceph_osd *osd = list_first_entry(&slow_osds,
struct ceph_osd,
o_keepalive_item);
list_del_init(&osd->o_keepalive_item);
ceph_con_keepalive(&osd->o_con);
}
up_write(&osdc->lock);
schedule_delayed_work(&osdc->timeout_work,
osdc->client->options->osd_keepalive_timeout);
}
static void handle_osds_timeout(struct work_struct *work)
{
struct ceph_osd_client *osdc =
container_of(work, struct ceph_osd_client,
osds_timeout_work.work);
unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
struct ceph_osd *osd, *nosd;
dout("%s osdc %p\n", __func__, osdc);
down_write(&osdc->lock);
list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
if (time_before(jiffies, osd->lru_ttl))
break;
WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
close_osd(osd);
}
up_write(&osdc->lock);
schedule_delayed_work(&osdc->osds_timeout_work,
round_jiffies_relative(delay));
}
static int ceph_oloc_decode(void **p, void *end,
struct ceph_object_locator *oloc)
{
u8 struct_v, struct_cv;
u32 len;
void *struct_end;
int ret = 0;
ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
struct_v = ceph_decode_8(p);
struct_cv = ceph_decode_8(p);
if (struct_v < 3) {
pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
struct_v, struct_cv);
goto e_inval;
}
if (struct_cv > 6) {
pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
struct_v, struct_cv);
goto e_inval;
}
len = ceph_decode_32(p);
ceph_decode_need(p, end, len, e_inval);
struct_end = *p + len;
oloc->pool = ceph_decode_64(p);
*p += 4; /* skip preferred */
len = ceph_decode_32(p);
if (len > 0) {
pr_warn("ceph_object_locator::key is set\n");
goto e_inval;
}
if (struct_v >= 5) {
bool changed = false;
len = ceph_decode_32(p);
if (len > 0) {
ceph_decode_need(p, end, len, e_inval);
if (!oloc->pool_ns ||
ceph_compare_string(oloc->pool_ns, *p, len))
changed = true;
*p += len;
} else {
if (oloc->pool_ns)
changed = true;
}
if (changed) {
/* redirect changes namespace */
pr_warn("ceph_object_locator::nspace is changed\n");
goto e_inval;
}
}
if (struct_v >= 6) {
s64 hash = ceph_decode_64(p);
if (hash != -1) {
pr_warn("ceph_object_locator::hash is set\n");
goto e_inval;
}
}
/* skip the rest */
*p = struct_end;
out:
return ret;
e_inval:
ret = -EINVAL;
goto out;
}
static int ceph_redirect_decode(void **p, void *end,
struct ceph_request_redirect *redir)
{
u8 struct_v, struct_cv;
u32 len;
void *struct_end;
int ret;
ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
struct_v = ceph_decode_8(p);
struct_cv = ceph_decode_8(p);
if (struct_cv > 1) {
pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
struct_v, struct_cv);
goto e_inval;
}
len = ceph_decode_32(p);
ceph_decode_need(p, end, len, e_inval);
struct_end = *p + len;
ret = ceph_oloc_decode(p, end, &redir->oloc);
if (ret)
goto out;
len = ceph_decode_32(p);
if (len > 0) {
pr_warn("ceph_request_redirect::object_name is set\n");
goto e_inval;
}
len = ceph_decode_32(p);
*p += len; /* skip osd_instructions */
/* skip the rest */
*p = struct_end;
out:
return ret;
e_inval:
ret = -EINVAL;
goto out;
}
struct MOSDOpReply {
struct ceph_pg pgid;
u64 flags;
int result;
u32 epoch;
int num_ops;
u32 outdata_len[CEPH_OSD_MAX_OPS];
s32 rval[CEPH_OSD_MAX_OPS];
int retry_attempt;
struct ceph_eversion replay_version;
u64 user_version;
struct ceph_request_redirect redirect;
};
static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
{
void *p = msg->front.iov_base;
void *const end = p + msg->front.iov_len;
u16 version = le16_to_cpu(msg->hdr.version);
struct ceph_eversion bad_replay_version;
u8 decode_redir;
u32 len;
int ret;
int i;
ceph_decode_32_safe(&p, end, len, e_inval);
ceph_decode_need(&p, end, len, e_inval);
p += len; /* skip oid */
ret = ceph_decode_pgid(&p, end, &m->pgid);
if (ret)
return ret;
ceph_decode_64_safe(&p, end, m->flags, e_inval);
ceph_decode_32_safe(&p, end, m->result, e_inval);
ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
p += sizeof(bad_replay_version);
ceph_decode_32_safe(&p, end, m->epoch, e_inval);
ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
if (m->num_ops > ARRAY_SIZE(m->outdata_len))
goto e_inval;
ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
e_inval);
for (i = 0; i < m->num_ops; i++) {
struct ceph_osd_op *op = p;
m->outdata_len[i] = le32_to_cpu(op->payload_len);
p += sizeof(*op);
}
ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
for (i = 0; i < m->num_ops; i++)
ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
if (version >= 5) {
ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
memcpy(&m->replay_version, p, sizeof(m->replay_version));
p += sizeof(m->replay_version);
ceph_decode_64_safe(&p, end, m->user_version, e_inval);
} else {
m->replay_version = bad_replay_version; /* struct */
m->user_version = le64_to_cpu(m->replay_version.version);
}
if (version >= 6) {
if (version >= 7)
ceph_decode_8_safe(&p, end, decode_redir, e_inval);
else
decode_redir = 1;
} else {
decode_redir = 0;
}
if (decode_redir) {
ret = ceph_redirect_decode(&p, end, &m->redirect);
if (ret)
return ret;
} else {
ceph_oloc_init(&m->redirect.oloc);
}
return 0;
e_inval:
return -EINVAL;
}
/*
* Handle MOSDOpReply. Set ->r_result and call the callback if it is
* specified.
*/
static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
{
struct ceph_osd_client *osdc = osd->o_osdc;
struct ceph_osd_request *req;
struct MOSDOpReply m;
u64 tid = le64_to_cpu(msg->hdr.tid);
u32 data_len = 0;
int ret;
int i;
dout("%s msg %p tid %llu\n", __func__, msg, tid);
down_read(&osdc->lock);
if (!osd_registered(osd)) {
dout("%s osd%d unknown\n", __func__, osd->o_osd);
goto out_unlock_osdc;
}
WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
mutex_lock(&osd->lock);
req = lookup_request(&osd->o_requests, tid);
if (!req) {
dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
goto out_unlock_session;
}
m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns;
ret = decode_MOSDOpReply(msg, &m);
m.redirect.oloc.pool_ns = NULL;
if (ret) {
pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
req->r_tid, ret);
ceph_msg_dump(msg);
goto fail_request;
}
dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
__func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
le64_to_cpu(m.replay_version.version), m.user_version);
if (m.retry_attempt >= 0) {
if (m.retry_attempt != req->r_attempts - 1) {
dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
req, req->r_tid, m.retry_attempt,
req->r_attempts - 1);
goto out_unlock_session;
}
} else {
WARN_ON(1); /* MOSDOpReply v4 is assumed */
}
if (!ceph_oloc_empty(&m.redirect.oloc)) {
dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
m.redirect.oloc.pool);
unlink_request(osd, req);
mutex_unlock(&osd->lock);
/*
* Not ceph_oloc_copy() - changing pool_ns is not
* supported.
*/
req->r_t.target_oloc.pool = m.redirect.oloc.pool;
req->r_flags |= CEPH_OSD_FLAG_REDIRECTED;
req->r_tid = 0;
__submit_request(req, false);
goto out_unlock_osdc;
}
if (m.num_ops != req->r_num_ops) {
pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
req->r_num_ops, req->r_tid);
goto fail_request;
}
for (i = 0; i < req->r_num_ops; i++) {
dout(" req %p tid %llu op %d rval %d len %u\n", req,
req->r_tid, i, m.rval[i], m.outdata_len[i]);
req->r_ops[i].rval = m.rval[i];
req->r_ops[i].outdata_len = m.outdata_len[i];
data_len += m.outdata_len[i];
}
if (data_len != le32_to_cpu(msg->hdr.data_len)) {
pr_err("sum of lens %u != %u for tid %llu\n", data_len,
le32_to_cpu(msg->hdr.data_len), req->r_tid);
goto fail_request;
}
dout("%s req %p tid %llu result %d data_len %u\n", __func__,
req, req->r_tid, m.result, data_len);
/*
* Since we only ever request ONDISK, we should only ever get
* one (type of) reply back.
*/
WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK));
req->r_result = m.result ?: data_len;
finish_request(req);
mutex_unlock(&osd->lock);
up_read(&osdc->lock);
__complete_request(req);
complete_all(&req->r_completion);
ceph_osdc_put_request(req);
return;
fail_request:
complete_request(req, -EIO);
out_unlock_session:
mutex_unlock(&osd->lock);
out_unlock_osdc:
up_read(&osdc->lock);
}
static void set_pool_was_full(struct ceph_osd_client *osdc)
{
struct rb_node *n;
for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
struct ceph_pg_pool_info *pi =
rb_entry(n, struct ceph_pg_pool_info, node);
pi->was_full = __pool_full(pi);
}
}
static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
{
struct ceph_pg_pool_info *pi;
pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
if (!pi)
return false;
return pi->was_full && !__pool_full(pi);
}
static enum calc_target_result
recalc_linger_target(struct ceph_osd_linger_request *lreq)
{
struct ceph_osd_client *osdc = lreq->osdc;
enum calc_target_result ct_res;
ct_res = calc_target(osdc, &lreq->t, NULL, true);
if (ct_res == CALC_TARGET_NEED_RESEND) {
struct ceph_osd *osd;
osd = lookup_create_osd(osdc, lreq->t.osd, true);
if (osd != lreq->osd) {
unlink_linger(lreq->osd, lreq);
link_linger(osd, lreq);
}
}
return ct_res;
}
/*
* Requeue requests whose mapping to an OSD has changed.
*/
static void scan_requests(struct ceph_osd *osd,
bool force_resend,
bool cleared_full,
bool check_pool_cleared_full,
struct rb_root *need_resend,
struct list_head *need_resend_linger)
{
struct ceph_osd_client *osdc = osd->o_osdc;
struct rb_node *n;
bool force_resend_writes;
for (n = rb_first(&osd->o_linger_requests); n; ) {
struct ceph_osd_linger_request *lreq =
rb_entry(n, struct ceph_osd_linger_request, node);
enum calc_target_result ct_res;
n = rb_next(n); /* recalc_linger_target() */
dout("%s lreq %p linger_id %llu\n", __func__, lreq,
lreq->linger_id);
ct_res = recalc_linger_target(lreq);
switch (ct_res) {
case CALC_TARGET_NO_ACTION:
force_resend_writes = cleared_full ||
(check_pool_cleared_full &&
pool_cleared_full(osdc, lreq->t.base_oloc.pool));
if (!force_resend && !force_resend_writes)
break;
/* fall through */
case CALC_TARGET_NEED_RESEND:
cancel_linger_map_check(lreq);
/*
* scan_requests() for the previous epoch(s)
* may have already added it to the list, since
* it's not unlinked here.
*/
if (list_empty(&lreq->scan_item))
list_add_tail(&lreq->scan_item, need_resend_linger);
break;
case CALC_TARGET_POOL_DNE:
list_del_init(&lreq->scan_item);
check_linger_pool_dne(lreq);
break;
}
}
for (n = rb_first(&osd->o_requests); n; ) {
struct ceph_osd_request *req =
rb_entry(n, struct ceph_osd_request, r_node);
enum calc_target_result ct_res;
n = rb_next(n); /* unlink_request(), check_pool_dne() */
dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
ct_res = calc_target(osdc, &req->r_t, &req->r_osd->o_con,
false);
switch (ct_res) {
case CALC_TARGET_NO_ACTION:
force_resend_writes = cleared_full ||
(check_pool_cleared_full &&
pool_cleared_full(osdc, req->r_t.base_oloc.pool));
if (!force_resend &&
(!(req->r_flags & CEPH_OSD_FLAG_WRITE) ||
!force_resend_writes))
break;
/* fall through */
case CALC_TARGET_NEED_RESEND:
cancel_map_check(req);
unlink_request(osd, req);
insert_request(need_resend, req);
break;
case CALC_TARGET_POOL_DNE:
check_pool_dne(req);
break;
}
}
}
static int handle_one_map(struct ceph_osd_client *osdc,
void *p, void *end, bool incremental,
struct rb_root *need_resend,
struct list_head *need_resend_linger)
{
struct ceph_osdmap *newmap;
struct rb_node *n;
bool skipped_map = false;
bool was_full;
was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
set_pool_was_full(osdc);
if (incremental)
newmap = osdmap_apply_incremental(&p, end, osdc->osdmap);
else
newmap = ceph_osdmap_decode(&p, end);
if (IS_ERR(newmap))
return PTR_ERR(newmap);
if (newmap != osdc->osdmap) {
/*
* Preserve ->was_full before destroying the old map.
* For pools that weren't in the old map, ->was_full
* should be false.
*/
for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
struct ceph_pg_pool_info *pi =
rb_entry(n, struct ceph_pg_pool_info, node);
struct ceph_pg_pool_info *old_pi;
old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
if (old_pi)
pi->was_full = old_pi->was_full;
else
WARN_ON(pi->was_full);
}
if (osdc->osdmap->epoch &&
osdc->osdmap->epoch + 1 < newmap->epoch) {
WARN_ON(incremental);
skipped_map = true;
}
ceph_osdmap_destroy(osdc->osdmap);
osdc->osdmap = newmap;
}
was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
scan_requests(&osdc->homeless_osd, skipped_map, was_full, true,
need_resend, need_resend_linger);
for (n = rb_first(&osdc->osds); n; ) {
struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
n = rb_next(n); /* close_osd() */
scan_requests(osd, skipped_map, was_full, true, need_resend,
need_resend_linger);
if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
memcmp(&osd->o_con.peer_addr,
ceph_osd_addr(osdc->osdmap, osd->o_osd),
sizeof(struct ceph_entity_addr)))
close_osd(osd);
}
return 0;
}
static void kick_requests(struct ceph_osd_client *osdc,
struct rb_root *need_resend,
struct list_head *need_resend_linger)
{
struct ceph_osd_linger_request *lreq, *nlreq;
enum calc_target_result ct_res;
struct rb_node *n;
/* make sure need_resend targets reflect latest map */
for (n = rb_first(need_resend); n; ) {
struct ceph_osd_request *req =
rb_entry(n, struct ceph_osd_request, r_node);
n = rb_next(n);
if (req->r_t.epoch < osdc->osdmap->epoch) {
ct_res = calc_target(osdc, &req->r_t, NULL, false);
if (ct_res == CALC_TARGET_POOL_DNE) {
erase_request(need_resend, req);
check_pool_dne(req);
}
}
}
for (n = rb_first(need_resend); n; ) {
struct ceph_osd_request *req =
rb_entry(n, struct ceph_osd_request, r_node);
struct ceph_osd *osd;
n = rb_next(n);
erase_request(need_resend, req); /* before link_request() */
osd = lookup_create_osd(osdc, req->r_t.osd, true);
link_request(osd, req);
if (!req->r_linger) {
if (!osd_homeless(osd) && !req->r_t.paused)
send_request(req);
} else {
cancel_linger_request(req);
}
}
list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) {
if (!osd_homeless(lreq->osd))
send_linger(lreq);
list_del_init(&lreq->scan_item);
}
}
/*
* Process updated osd map.
*
* The message contains any number of incremental and full maps, normally
* indicating some sort of topology change in the cluster. Kick requests
* off to different OSDs as needed.
*/
void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
{
void *p = msg->front.iov_base;
void *const end = p + msg->front.iov_len;
u32 nr_maps, maplen;
u32 epoch;
struct ceph_fsid fsid;
struct rb_root need_resend = RB_ROOT;
LIST_HEAD(need_resend_linger);
bool handled_incremental = false;
bool was_pauserd, was_pausewr;
bool pauserd, pausewr;
int err;
dout("%s have %u\n", __func__, osdc->osdmap->epoch);
down_write(&osdc->lock);
/* verify fsid */
ceph_decode_need(&p, end, sizeof(fsid), bad);
ceph_decode_copy(&p, &fsid, sizeof(fsid));
if (ceph_check_fsid(osdc->client, &fsid) < 0)
goto bad;
was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
have_pool_full(osdc);
/* incremental maps */
ceph_decode_32_safe(&p, end, nr_maps, bad);
dout(" %d inc maps\n", nr_maps);
while (nr_maps > 0) {
ceph_decode_need(&p, end, 2*sizeof(u32), bad);
epoch = ceph_decode_32(&p);
maplen = ceph_decode_32(&p);
ceph_decode_need(&p, end, maplen, bad);
if (osdc->osdmap->epoch &&
osdc->osdmap->epoch + 1 == epoch) {
dout("applying incremental map %u len %d\n",
epoch, maplen);
err = handle_one_map(osdc, p, p + maplen, true,
&need_resend, &need_resend_linger);
if (err)
goto bad;
handled_incremental = true;
} else {
dout("ignoring incremental map %u len %d\n",
epoch, maplen);
}
p += maplen;
nr_maps--;
}
if (handled_incremental)
goto done;
/* full maps */
ceph_decode_32_safe(&p, end, nr_maps, bad);
dout(" %d full maps\n", nr_maps);
while (nr_maps) {
ceph_decode_need(&p, end, 2*sizeof(u32), bad);
epoch = ceph_decode_32(&p);
maplen = ceph_decode_32(&p);
ceph_decode_need(&p, end, maplen, bad);
if (nr_maps > 1) {
dout("skipping non-latest full map %u len %d\n",
epoch, maplen);
} else if (osdc->osdmap->epoch >= epoch) {
dout("skipping full map %u len %d, "
"older than our %u\n", epoch, maplen,
osdc->osdmap->epoch);
} else {
dout("taking full map %u len %d\n", epoch, maplen);
err = handle_one_map(osdc, p, p + maplen, false,
&need_resend, &need_resend_linger);
if (err)
goto bad;
}
p += maplen;
nr_maps--;
}
done:
/*
* subscribe to subsequent osdmap updates if full to ensure
* we find out when we are no longer full and stop returning
* ENOSPC.
*/
pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
have_pool_full(osdc);
if (was_pauserd || was_pausewr || pauserd || pausewr ||
osdc->osdmap->epoch < osdc->epoch_barrier)
maybe_request_map(osdc);
kick_requests(osdc, &need_resend, &need_resend_linger);
ceph_osdc_abort_on_full(osdc);
ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
osdc->osdmap->epoch);
up_write(&osdc->lock);
wake_up_all(&osdc->client->auth_wq);
return;
bad:
pr_err("osdc handle_map corrupt msg\n");
ceph_msg_dump(msg);
up_write(&osdc->lock);
}
/*
* Resubmit requests pending on the given osd.
*/
static void kick_osd_requests(struct ceph_osd *osd)
{
struct rb_node *n;
clear_backoffs(osd);
for (n = rb_first(&osd->o_requests); n; ) {
struct ceph_osd_request *req =
rb_entry(n, struct ceph_osd_request, r_node);
n = rb_next(n); /* cancel_linger_request() */
if (!req->r_linger) {
if (!req->r_t.paused)
send_request(req);
} else {
cancel_linger_request(req);
}
}
for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
struct ceph_osd_linger_request *lreq =
rb_entry(n, struct ceph_osd_linger_request, node);
send_linger(lreq);
}
}
/*
* If the osd connection drops, we need to resubmit all requests.
*/
static void osd_fault(struct ceph_connection *con)
{
struct ceph_osd *osd = con->private;
struct ceph_osd_client *osdc = osd->o_osdc;
dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
down_write(&osdc->lock);
if (!osd_registered(osd)) {
dout("%s osd%d unknown\n", __func__, osd->o_osd);
goto out_unlock;
}
if (!reopen_osd(osd))
kick_osd_requests(osd);
maybe_request_map(osdc);
out_unlock:
up_write(&osdc->lock);
}
struct MOSDBackoff {
struct ceph_spg spgid;
u32 map_epoch;
u8 op;
u64 id;
struct ceph_hobject_id *begin;
struct ceph_hobject_id *end;
};
static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m)
{
void *p = msg->front.iov_base;
void *const end = p + msg->front.iov_len;
u8 struct_v;
u32 struct_len;
int ret;
ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len);
if (ret)
return ret;
ret = ceph_decode_pgid(&p, end, &m->spgid.pgid);
if (ret)
return ret;
ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval);
ceph_decode_32_safe(&p, end, m->map_epoch, e_inval);
ceph_decode_8_safe(&p, end, m->op, e_inval);
ceph_decode_64_safe(&p, end, m->id, e_inval);
m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO);
if (!m->begin)
return -ENOMEM;
ret = decode_hoid(&p, end, m->begin);
if (ret) {
free_hoid(m->begin);
return ret;
}
m->end = kzalloc(sizeof(*m->end), GFP_NOIO);
if (!m->end) {
free_hoid(m->begin);
return -ENOMEM;
}
ret = decode_hoid(&p, end, m->end);
if (ret) {
free_hoid(m->begin);
free_hoid(m->end);
return ret;
}
return 0;
e_inval:
return -EINVAL;
}
static struct ceph_msg *create_backoff_message(
const struct ceph_osd_backoff *backoff,
u32 map_epoch)
{
struct ceph_msg *msg;
void *p, *end;
int msg_size;
msg_size = CEPH_ENCODING_START_BLK_LEN +
CEPH_PGID_ENCODING_LEN + 1; /* spgid */
msg_size += 4 + 1 + 8; /* map_epoch, op, id */
msg_size += CEPH_ENCODING_START_BLK_LEN +
hoid_encoding_size(backoff->begin);
msg_size += CEPH_ENCODING_START_BLK_LEN +
hoid_encoding_size(backoff->end);
msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true);
if (!msg)
return NULL;
p = msg->front.iov_base;
end = p + msg->front_alloc_len;
encode_spgid(&p, &backoff->spgid);
ceph_encode_32(&p, map_epoch);
ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK);
ceph_encode_64(&p, backoff->id);
encode_hoid(&p, end, backoff->begin);
encode_hoid(&p, end, backoff->end);
BUG_ON(p != end);
msg->front.iov_len = p - msg->front.iov_base;
msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */
msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
return msg;
}
static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m)
{
struct ceph_spg_mapping *spg;
struct ceph_osd_backoff *backoff;
struct ceph_msg *msg;
dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid);
if (!spg) {
spg = alloc_spg_mapping();
if (!spg) {
pr_err("%s failed to allocate spg\n", __func__);
return;
}
spg->spgid = m->spgid; /* struct */
insert_spg_mapping(&osd->o_backoff_mappings, spg);
}
backoff = alloc_backoff();
if (!backoff) {
pr_err("%s failed to allocate backoff\n", __func__);
return;
}
backoff->spgid = m->spgid; /* struct */
backoff->id = m->id;
backoff->begin = m->begin;
m->begin = NULL; /* backoff now owns this */
backoff->end = m->end;
m->end = NULL; /* ditto */
insert_backoff(&spg->backoffs, backoff);
insert_backoff_by_id(&osd->o_backoffs_by_id, backoff);
/*
* Ack with original backoff's epoch so that the OSD can
* discard this if there was a PG split.
*/
msg = create_backoff_message(backoff, m->map_epoch);
if (!msg) {
pr_err("%s failed to allocate msg\n", __func__);
return;
}
ceph_con_send(&osd->o_con, msg);
}
static bool target_contained_by(const struct ceph_osd_request_target *t,
const struct ceph_hobject_id *begin,
const struct ceph_hobject_id *end)
{
struct ceph_hobject_id hoid;
int cmp;
hoid_fill_from_target(&hoid, t);
cmp = hoid_compare(&hoid, begin);
return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0);
}
static void handle_backoff_unblock(struct ceph_osd *osd,
const struct MOSDBackoff *m)
{
struct ceph_spg_mapping *spg;
struct ceph_osd_backoff *backoff;
struct rb_node *n;
dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id);
if (!backoff) {
pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n",
__func__, osd->o_osd, m->spgid.pgid.pool,
m->spgid.pgid.seed, m->spgid.shard, m->id);
return;
}
if (hoid_compare(backoff->begin, m->begin) &&
hoid_compare(backoff->end, m->end)) {
pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n",
__func__, osd->o_osd, m->spgid.pgid.pool,
m->spgid.pgid.seed, m->spgid.shard, m->id);
/* unblock it anyway... */
}
spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid);
BUG_ON(!spg);
erase_backoff(&spg->backoffs, backoff);
erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
free_backoff(backoff);
if (RB_EMPTY_ROOT(&spg->backoffs)) {
erase_spg_mapping(&osd->o_backoff_mappings, spg);
free_spg_mapping(spg);
}
for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
struct ceph_osd_request *req =
rb_entry(n, struct ceph_osd_request, r_node);
if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) {
/*
* Match against @m, not @backoff -- the PG may
* have split on the OSD.
*/
if (target_contained_by(&req->r_t, m->begin, m->end)) {
/*
* If no other installed backoff applies,
* resend.
*/
send_request(req);
}
}
}
}
static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg)
{
struct ceph_osd_client *osdc = osd->o_osdc;
struct MOSDBackoff m;
int ret;
down_read(&osdc->lock);
if (!osd_registered(osd)) {
dout("%s osd%d unknown\n", __func__, osd->o_osd);
up_read(&osdc->lock);
return;
}
WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
mutex_lock(&osd->lock);
ret = decode_MOSDBackoff(msg, &m);
if (ret) {
pr_err("failed to decode MOSDBackoff: %d\n", ret);
ceph_msg_dump(msg);
goto out_unlock;
}
switch (m.op) {
case CEPH_OSD_BACKOFF_OP_BLOCK:
handle_backoff_block(osd, &m);
break;
case CEPH_OSD_BACKOFF_OP_UNBLOCK:
handle_backoff_unblock(osd, &m);
break;
default:
pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op);
}
free_hoid(m.begin);
free_hoid(m.end);
out_unlock:
mutex_unlock(&osd->lock);
up_read(&osdc->lock);
}
/*
* Process osd watch notifications
*/
static void handle_watch_notify(struct ceph_osd_client *osdc,
struct ceph_msg *msg)
{
void *p = msg->front.iov_base;
void *const end = p + msg->front.iov_len;
struct ceph_osd_linger_request *lreq;
struct linger_work *lwork;
u8 proto_ver, opcode;
u64 cookie, notify_id;
u64 notifier_id = 0;
s32 return_code = 0;
void *payload = NULL;
u32 payload_len = 0;
ceph_decode_8_safe(&p, end, proto_ver, bad);
ceph_decode_8_safe(&p, end, opcode, bad);
ceph_decode_64_safe(&p, end, cookie, bad);
p += 8; /* skip ver */
ceph_decode_64_safe(&p, end, notify_id, bad);
if (proto_ver >= 1) {
ceph_decode_32_safe(&p, end, payload_len, bad);
ceph_decode_need(&p, end, payload_len, bad);
payload = p;
p += payload_len;
}
if (le16_to_cpu(msg->hdr.version) >= 2)
ceph_decode_32_safe(&p, end, return_code, bad);
if (le16_to_cpu(msg->hdr.version) >= 3)
ceph_decode_64_safe(&p, end, notifier_id, bad);
down_read(&osdc->lock);
lreq = lookup_linger_osdc(&osdc->linger_requests, cookie);
if (!lreq) {
dout("%s opcode %d cookie %llu dne\n", __func__, opcode,
cookie);
goto out_unlock_osdc;
}
mutex_lock(&lreq->lock);
dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
opcode, cookie, lreq, lreq->is_watch);
if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
if (!lreq->last_error) {
lreq->last_error = -ENOTCONN;
queue_watch_error(lreq);
}
} else if (!lreq->is_watch) {
/* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */
if (lreq->notify_id && lreq->notify_id != notify_id) {
dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq,
lreq->notify_id, notify_id);
} else if (!completion_done(&lreq->notify_finish_wait)) {
struct ceph_msg_data *data =
list_first_entry_or_null(&msg->data,
struct ceph_msg_data,
links);
if (data) {
if (lreq->preply_pages) {
WARN_ON(data->type !=
CEPH_MSG_DATA_PAGES);
*lreq->preply_pages = data->pages;
*lreq->preply_len = data->length;
} else {
ceph_release_page_vector(data->pages,
calc_pages_for(0, data->length));
}
}
lreq->notify_finish_error = return_code;
complete_all(&lreq->notify_finish_wait);
}
} else {
/* CEPH_WATCH_EVENT_NOTIFY */
lwork = lwork_alloc(lreq, do_watch_notify);
if (!lwork) {
pr_err("failed to allocate notify-lwork\n");
goto out_unlock_lreq;
}
lwork->notify.notify_id = notify_id;
lwork->notify.notifier_id = notifier_id;
lwork->notify.payload = payload;
lwork->notify.payload_len = payload_len;
lwork->notify.msg = ceph_msg_get(msg);
lwork_queue(lwork);
}
out_unlock_lreq:
mutex_unlock(&lreq->lock);
out_unlock_osdc:
up_read(&osdc->lock);
return;
bad:
pr_err("osdc handle_watch_notify corrupt msg\n");
}
/*
* Register request, send initial attempt.
*/
int ceph_osdc_start_request(struct ceph_osd_client *osdc,
struct ceph_osd_request *req,
bool nofail)
{
down_read(&osdc->lock);
submit_request(req, false);
up_read(&osdc->lock);
return 0;
}
EXPORT_SYMBOL(ceph_osdc_start_request);
/*
* Unregister a registered request. The request is not completed:
* ->r_result isn't set and __complete_request() isn't called.
*/
void ceph_osdc_cancel_request(struct ceph_osd_request *req)
{
struct ceph_osd_client *osdc = req->r_osdc;
down_write(&osdc->lock);
if (req->r_osd)
cancel_request(req);
up_write(&osdc->lock);
}
EXPORT_SYMBOL(ceph_osdc_cancel_request);
/*
* @timeout: in jiffies, 0 means "wait forever"
*/
static int wait_request_timeout(struct ceph_osd_request *req,
unsigned long timeout)
{
long left;
dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
left = wait_for_completion_killable_timeout(&req->r_completion,
ceph_timeout_jiffies(timeout));
if (left <= 0) {
left = left ?: -ETIMEDOUT;
ceph_osdc_cancel_request(req);
} else {
left = req->r_result; /* completed */
}
return left;
}
/*
* wait for a request to complete
*/
int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
struct ceph_osd_request *req)
{
return wait_request_timeout(req, 0);
}
EXPORT_SYMBOL(ceph_osdc_wait_request);
/*
* sync - wait for all in-flight requests to flush. avoid starvation.
*/
void ceph_osdc_sync(struct ceph_osd_client *osdc)
{
struct rb_node *n, *p;
u64 last_tid = atomic64_read(&osdc->last_tid);
again:
down_read(&osdc->lock);
for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
mutex_lock(&osd->lock);
for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
struct ceph_osd_request *req =
rb_entry(p, struct ceph_osd_request, r_node);
if (req->r_tid > last_tid)
break;
if (!(req->r_flags & CEPH_OSD_FLAG_WRITE))
continue;
ceph_osdc_get_request(req);
mutex_unlock(&osd->lock);
up_read(&osdc->lock);
dout("%s waiting on req %p tid %llu last_tid %llu\n",
__func__, req, req->r_tid, last_tid);
wait_for_completion(&req->r_completion);
ceph_osdc_put_request(req);
goto again;
}
mutex_unlock(&osd->lock);
}
up_read(&osdc->lock);
dout("%s done last_tid %llu\n", __func__, last_tid);
}
EXPORT_SYMBOL(ceph_osdc_sync);
static struct ceph_osd_request *
alloc_linger_request(struct ceph_osd_linger_request *lreq)
{
struct ceph_osd_request *req;
req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO);
if (!req)
return NULL;
ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
if (ceph_osdc_alloc_messages(req, GFP_NOIO)) {
ceph_osdc_put_request(req);
return NULL;
}
return req;
}
/*
* Returns a handle, caller owns a ref.
*/
struct ceph_osd_linger_request *
ceph_osdc_watch(struct ceph_osd_client *osdc,
struct ceph_object_id *oid,
struct ceph_object_locator *oloc,
rados_watchcb2_t wcb,
rados_watcherrcb_t errcb,
void *data)
{
struct ceph_osd_linger_request *lreq;
int ret;
lreq = linger_alloc(osdc);
if (!lreq)
return ERR_PTR(-ENOMEM);
lreq->is_watch = true;
lreq->wcb = wcb;
lreq->errcb = errcb;
lreq->data = data;
lreq->watch_valid_thru = jiffies;
ceph_oid_copy(&lreq->t.base_oid, oid);
ceph_oloc_copy(&lreq->t.base_oloc, oloc);
lreq->t.flags = CEPH_OSD_FLAG_WRITE;
ktime_get_real_ts(&lreq->mtime);
lreq->reg_req = alloc_linger_request(lreq);
if (!lreq->reg_req) {
ret = -ENOMEM;
goto err_put_lreq;
}
lreq->ping_req = alloc_linger_request(lreq);
if (!lreq->ping_req) {
ret = -ENOMEM;
goto err_put_lreq;
}
down_write(&osdc->lock);
linger_register(lreq); /* before osd_req_op_* */
osd_req_op_watch_init(lreq->reg_req, 0, lreq->linger_id,
CEPH_OSD_WATCH_OP_WATCH);
osd_req_op_watch_init(lreq->ping_req, 0, lreq->linger_id,
CEPH_OSD_WATCH_OP_PING);
linger_submit(lreq);
up_write(&osdc->lock);
ret = linger_reg_commit_wait(lreq);
if (ret) {
linger_cancel(lreq);
goto err_put_lreq;
}
return lreq;
err_put_lreq:
linger_put(lreq);
return ERR_PTR(ret);
}
EXPORT_SYMBOL(ceph_osdc_watch);
/*
* Releases a ref.
*
* Times out after mount_timeout to preserve rbd unmap behaviour
* introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap
* with mount_timeout").
*/
int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
struct ceph_osd_linger_request *lreq)
{
struct ceph_options *opts = osdc->client->options;
struct ceph_osd_request *req;
int ret;
req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
if (!req)
return -ENOMEM;
ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
req->r_flags = CEPH_OSD_FLAG_WRITE;
ktime_get_real_ts(&req->r_mtime);
osd_req_op_watch_init(req, 0, lreq->linger_id,
CEPH_OSD_WATCH_OP_UNWATCH);
ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
if (ret)
goto out_put_req;
ceph_osdc_start_request(osdc, req, false);
linger_cancel(lreq);
linger_put(lreq);
ret = wait_request_timeout(req, opts->mount_timeout);
out_put_req:
ceph_osdc_put_request(req);
return ret;
}
EXPORT_SYMBOL(ceph_osdc_unwatch);
static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which,
u64 notify_id, u64 cookie, void *payload,
size_t payload_len)
{
struct ceph_osd_req_op *op;
struct ceph_pagelist *pl;
int ret;
op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0);
pl = kmalloc(sizeof(*pl), 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) {
ret |= ceph_pagelist_encode_32(pl, payload_len);
ret |= ceph_pagelist_append(pl, payload, payload_len);
} else {
ret |= ceph_pagelist_encode_32(pl, 0);
}
if (ret) {
ceph_pagelist_release(pl);
return -ENOMEM;
}
ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl);
op->indata_len = pl->length;
return 0;
}
int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
struct ceph_object_id *oid,
struct ceph_object_locator *oloc,
u64 notify_id,
u64 cookie,
void *payload,
size_t payload_len)
{
struct ceph_osd_request *req;
int ret;
req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
if (!req)
return -ENOMEM;
ceph_oid_copy(&req->r_base_oid, oid);
ceph_oloc_copy(&req->r_base_oloc, oloc);
req->r_flags = CEPH_OSD_FLAG_READ;
ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
if (ret)
goto out_put_req;
ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload,
payload_len);
if (ret)
goto out_put_req;
ceph_osdc_start_request(osdc, req, false);
ret = ceph_osdc_wait_request(osdc, req);
out_put_req:
ceph_osdc_put_request(req);
return ret;
}
EXPORT_SYMBOL(ceph_osdc_notify_ack);
static int osd_req_op_notify_init(struct ceph_osd_request *req, int which,
u64 cookie, u32 prot_ver, u32 timeout,
void *payload, size_t payload_len)
{
struct ceph_osd_req_op *op;
struct ceph_pagelist *pl;
int ret;
op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0);
op->notify.cookie = cookie;
pl = kmalloc(sizeof(*pl), 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);
ret |= ceph_pagelist_append(pl, payload, payload_len);
if (ret) {
ceph_pagelist_release(pl);
return -ENOMEM;
}
ceph_osd_data_pagelist_init(&op->notify.request_data, pl);
op->indata_len = pl->length;
return 0;
}
/*
* @timeout: in seconds
*
* @preply_{pages,len} are initialized both on success and error.
* The caller is responsible for:
*
* ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len))
*/
int ceph_osdc_notify(struct ceph_osd_client *osdc,
struct ceph_object_id *oid,
struct ceph_object_locator *oloc,
void *payload,
size_t payload_len,
u32 timeout,
struct page ***preply_pages,
size_t *preply_len)
{
struct ceph_osd_linger_request *lreq;
struct page **pages;
int ret;
WARN_ON(!timeout);
if (preply_pages) {
*preply_pages = NULL;
*preply_len = 0;
}
lreq = linger_alloc(osdc);
if (!lreq)
return -ENOMEM;
lreq->preply_pages = preply_pages;
lreq->preply_len = preply_len;
ceph_oid_copy(&lreq->t.base_oid, oid);
ceph_oloc_copy(&lreq->t.base_oloc, oloc);
lreq->t.flags = CEPH_OSD_FLAG_READ;
lreq->reg_req = alloc_linger_request(lreq);
if (!lreq->reg_req) {
ret = -ENOMEM;
goto out_put_lreq;
}
/* for notify_id */
pages = ceph_alloc_page_vector(1, GFP_NOIO);
if (IS_ERR(pages)) {
ret = PTR_ERR(pages);
goto out_put_lreq;
}
down_write(&osdc->lock);
linger_register(lreq); /* before osd_req_op_* */
ret = osd_req_op_notify_init(lreq->reg_req, 0, lreq->linger_id, 1,
timeout, payload, payload_len);
if (ret) {
linger_unregister(lreq);
up_write(&osdc->lock);
ceph_release_page_vector(pages, 1);
goto out_put_lreq;
}
ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify,
response_data),
pages, PAGE_SIZE, 0, false, true);
linger_submit(lreq);
up_write(&osdc->lock);
ret = linger_reg_commit_wait(lreq);
if (!ret)
ret = linger_notify_finish_wait(lreq);
else
dout("lreq %p failed to initiate notify %d\n", lreq, ret);
linger_cancel(lreq);
out_put_lreq:
linger_put(lreq);
return ret;
}
EXPORT_SYMBOL(ceph_osdc_notify);
/*
* Return the number of milliseconds since the watch was last
* confirmed, or an error. If there is an error, the watch is no
* longer valid, and should be destroyed with ceph_osdc_unwatch().
*/
int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
struct ceph_osd_linger_request *lreq)
{
unsigned long stamp, age;
int ret;
down_read(&osdc->lock);
mutex_lock(&lreq->lock);
stamp = lreq->watch_valid_thru;
if (!list_empty(&lreq->pending_lworks)) {
struct linger_work *lwork =
list_first_entry(&lreq->pending_lworks,
struct linger_work,
pending_item);
if (time_before(lwork->queued_stamp, stamp))
stamp = lwork->queued_stamp;
}
age = jiffies - stamp;
dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__,
lreq, lreq->linger_id, age, lreq->last_error);
/* we are truncating to msecs, so return a safe upper bound */
ret = lreq->last_error ?: 1 + jiffies_to_msecs(age);
mutex_unlock(&lreq->lock);
up_read(&osdc->lock);
return ret;
}
static int decode_watcher(void **p, void *end, struct ceph_watch_item *item)
{
u8 struct_v;
u32 struct_len;
int ret;
ret = ceph_start_decoding(p, end, 2, "watch_item_t",
&struct_v, &struct_len);
if (ret)
return ret;
ceph_decode_copy(p, &item->name, sizeof(item->name));
item->cookie = ceph_decode_64(p);
*p += 4; /* skip timeout_seconds */
if (struct_v >= 2) {
ceph_decode_copy(p, &item->addr, sizeof(item->addr));
ceph_decode_addr(&item->addr);
}
dout("%s %s%llu cookie %llu addr %s\n", __func__,
ENTITY_NAME(item->name), item->cookie,
ceph_pr_addr(&item->addr.in_addr));
return 0;
}
static int decode_watchers(void **p, void *end,
struct ceph_watch_item **watchers,
u32 *num_watchers)
{
u8 struct_v;
u32 struct_len;
int i;
int ret;
ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t",
&struct_v, &struct_len);
if (ret)
return ret;
*num_watchers = ceph_decode_32(p);
*watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO);
if (!*watchers)
return -ENOMEM;
for (i = 0; i < *num_watchers; i++) {
ret = decode_watcher(p, end, *watchers + i);
if (ret) {
kfree(*watchers);
return ret;
}
}
return 0;
}
/*
* On success, the caller is responsible for:
*
* kfree(watchers);
*/
int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
struct ceph_object_id *oid,
struct ceph_object_locator *oloc,
struct ceph_watch_item **watchers,
u32 *num_watchers)
{
struct ceph_osd_request *req;
struct page **pages;
int ret;
req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
if (!req)
return -ENOMEM;
ceph_oid_copy(&req->r_base_oid, oid);
ceph_oloc_copy(&req->r_base_oloc, oloc);
req->r_flags = CEPH_OSD_FLAG_READ;
ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
if (ret)
goto out_put_req;
pages = ceph_alloc_page_vector(1, GFP_NOIO);
if (IS_ERR(pages)) {
ret = PTR_ERR(pages);
goto out_put_req;
}
osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0);
ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers,
response_data),
pages, PAGE_SIZE, 0, false, true);
ceph_osdc_start_request(osdc, req, false);
ret = ceph_osdc_wait_request(osdc, req);
if (ret >= 0) {
void *p = page_address(pages[0]);
void *const end = p + req->r_ops[0].outdata_len;
ret = decode_watchers(&p, end, watchers, num_watchers);
}
out_put_req:
ceph_osdc_put_request(req);
return ret;
}
EXPORT_SYMBOL(ceph_osdc_list_watchers);
/*
* Call all pending notify callbacks - for use after a watch is
* unregistered, to make sure no more callbacks for it will be invoked
*/
void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
{
dout("%s osdc %p\n", __func__, osdc);
flush_workqueue(osdc->notify_wq);
}
EXPORT_SYMBOL(ceph_osdc_flush_notifies);
void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc)
{
down_read(&osdc->lock);
maybe_request_map(osdc);
up_read(&osdc->lock);
}
EXPORT_SYMBOL(ceph_osdc_maybe_request_map);
/*
* Execute an OSD class method on an object.
*
* @flags: CEPH_OSD_FLAG_*
* @resp_len: in/out param for reply length
*/
int ceph_osdc_call(struct ceph_osd_client *osdc,
struct ceph_object_id *oid,
struct ceph_object_locator *oloc,
const char *class, const char *method,
unsigned int flags,
struct page *req_page, size_t req_len,
struct page *resp_page, size_t *resp_len)
{
struct ceph_osd_request *req;
int ret;
if (req_len > PAGE_SIZE || (resp_page && *resp_len > PAGE_SIZE))
return -E2BIG;
req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
if (!req)
return -ENOMEM;
ceph_oid_copy(&req->r_base_oid, oid);
ceph_oloc_copy(&req->r_base_oloc, oloc);
req->r_flags = flags;
ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
if (ret)
goto out_put_req;
osd_req_op_cls_init(req, 0, CEPH_OSD_OP_CALL, class, method);
if (req_page)
osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len,
0, false, false);
if (resp_page)
osd_req_op_cls_response_data_pages(req, 0, &resp_page,
*resp_len, 0, false, false);
ceph_osdc_start_request(osdc, req, false);
ret = ceph_osdc_wait_request(osdc, req);
if (ret >= 0) {
ret = req->r_ops[0].rval;
if (resp_page)
*resp_len = req->r_ops[0].outdata_len;
}
out_put_req:
ceph_osdc_put_request(req);
return ret;
}
EXPORT_SYMBOL(ceph_osdc_call);
/*
* init, shutdown
*/
int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
{
int err;
dout("init\n");
osdc->client = client;
init_rwsem(&osdc->lock);
osdc->osds = RB_ROOT;
INIT_LIST_HEAD(&osdc->osd_lru);
spin_lock_init(&osdc->osd_lru_lock);
osd_init(&osdc->homeless_osd);
osdc->homeless_osd.o_osdc = osdc;
osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
osdc->last_linger_id = CEPH_LINGER_ID_START;
osdc->linger_requests = RB_ROOT;
osdc->map_checks = RB_ROOT;
osdc->linger_map_checks = RB_ROOT;
INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
err = -ENOMEM;
osdc->osdmap = ceph_osdmap_alloc();
if (!osdc->osdmap)
goto out;
osdc->req_mempool = mempool_create_slab_pool(10,
ceph_osd_request_cache);
if (!osdc->req_mempool)
goto out_map;
err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
PAGE_SIZE, 10, true, "osd_op");
if (err < 0)
goto out_mempool;
err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
PAGE_SIZE, 10, true, "osd_op_reply");
if (err < 0)
goto out_msgpool;
err = -ENOMEM;
osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
if (!osdc->notify_wq)
goto out_msgpool_reply;
schedule_delayed_work(&osdc->timeout_work,
osdc->client->options->osd_keepalive_timeout);
schedule_delayed_work(&osdc->osds_timeout_work,
round_jiffies_relative(osdc->client->options->osd_idle_ttl));
return 0;
out_msgpool_reply:
ceph_msgpool_destroy(&osdc->msgpool_op_reply);
out_msgpool:
ceph_msgpool_destroy(&osdc->msgpool_op);
out_mempool:
mempool_destroy(osdc->req_mempool);
out_map:
ceph_osdmap_destroy(osdc->osdmap);
out:
return err;
}
void ceph_osdc_stop(struct ceph_osd_client *osdc)
{
flush_workqueue(osdc->notify_wq);
destroy_workqueue(osdc->notify_wq);
cancel_delayed_work_sync(&osdc->timeout_work);
cancel_delayed_work_sync(&osdc->osds_timeout_work);
down_write(&osdc->lock);
while (!RB_EMPTY_ROOT(&osdc->osds)) {
struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
struct ceph_osd, o_node);
close_osd(osd);
}
up_write(&osdc->lock);
WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1);
osd_cleanup(&osdc->homeless_osd);
WARN_ON(!list_empty(&osdc->osd_lru));
WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
WARN_ON(atomic_read(&osdc->num_requests));
WARN_ON(atomic_read(&osdc->num_homeless));
ceph_osdmap_destroy(osdc->osdmap);
mempool_destroy(osdc->req_mempool);
ceph_msgpool_destroy(&osdc->msgpool_op);
ceph_msgpool_destroy(&osdc->msgpool_op_reply);
}
/*
* Read some contiguous pages. If we cross a stripe boundary, shorten
* *plen. Return number of bytes read, or error.
*/
int ceph_osdc_readpages(struct ceph_osd_client *osdc,
struct ceph_vino vino, struct ceph_file_layout *layout,
u64 off, u64 *plen,
u32 truncate_seq, u64 truncate_size,
struct page **pages, int num_pages, int page_align)
{
struct ceph_osd_request *req;
int rc = 0;
dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
vino.snap, off, *plen);
req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
NULL, truncate_seq, truncate_size,
false);
if (IS_ERR(req))
return PTR_ERR(req);
/* it may be a short read due to an object boundary */
osd_req_op_extent_osd_data_pages(req, 0,
pages, *plen, page_align, false, false);
dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
off, *plen, *plen, page_align);
rc = ceph_osdc_start_request(osdc, req, false);
if (!rc)
rc = ceph_osdc_wait_request(osdc, req);
ceph_osdc_put_request(req);
dout("readpages result %d\n", rc);
return rc;
}
EXPORT_SYMBOL(ceph_osdc_readpages);
/*
* do a synchronous write on N pages
*/
int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
struct ceph_file_layout *layout,
struct ceph_snap_context *snapc,
u64 off, u64 len,
u32 truncate_seq, u64 truncate_size,
struct timespec *mtime,
struct page **pages, int num_pages)
{
struct ceph_osd_request *req;
int rc = 0;
int page_align = off & ~PAGE_MASK;
req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE,
snapc, truncate_seq, truncate_size,
true);
if (IS_ERR(req))
return PTR_ERR(req);
/* it may be a short write due to an object boundary */
osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
false, false);
dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
req->r_mtime = *mtime;
rc = ceph_osdc_start_request(osdc, req, true);
if (!rc)
rc = ceph_osdc_wait_request(osdc, req);
ceph_osdc_put_request(req);
if (rc == 0)
rc = len;
dout("writepages result %d\n", rc);
return rc;
}
EXPORT_SYMBOL(ceph_osdc_writepages);
int ceph_osdc_setup(void)
{
size_t size = sizeof(struct ceph_osd_request) +
CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
BUG_ON(ceph_osd_request_cache);
ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
0, 0, NULL);
return ceph_osd_request_cache ? 0 : -ENOMEM;
}
EXPORT_SYMBOL(ceph_osdc_setup);
void ceph_osdc_cleanup(void)
{
BUG_ON(!ceph_osd_request_cache);
kmem_cache_destroy(ceph_osd_request_cache);
ceph_osd_request_cache = NULL;
}
EXPORT_SYMBOL(ceph_osdc_cleanup);
/*
* handle incoming message
*/
static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
{
struct ceph_osd *osd = con->private;
struct ceph_osd_client *osdc = osd->o_osdc;
int type = le16_to_cpu(msg->hdr.type);
switch (type) {
case CEPH_MSG_OSD_MAP:
ceph_osdc_handle_map(osdc, msg);
break;
case CEPH_MSG_OSD_OPREPLY:
handle_reply(osd, msg);
break;
case CEPH_MSG_OSD_BACKOFF:
handle_backoff(osd, msg);
break;
case CEPH_MSG_WATCH_NOTIFY:
handle_watch_notify(osdc, msg);
break;
default:
pr_err("received unknown message type %d %s\n", type,
ceph_msg_type_name(type));
}
ceph_msg_put(msg);
}
/*
* Lookup and return message for incoming reply. Don't try to do
* anything about a larger than preallocated data portion of the
* message at the moment - for now, just skip the message.
*/
static struct ceph_msg *get_reply(struct ceph_connection *con,
struct ceph_msg_header *hdr,
int *skip)
{
struct ceph_osd *osd = con->private;
struct ceph_osd_client *osdc = osd->o_osdc;
struct ceph_msg *m = NULL;
struct ceph_osd_request *req;
int front_len = le32_to_cpu(hdr->front_len);
int data_len = le32_to_cpu(hdr->data_len);
u64 tid = le64_to_cpu(hdr->tid);
down_read(&osdc->lock);
if (!osd_registered(osd)) {
dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd);
*skip = 1;
goto out_unlock_osdc;
}
WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num));
mutex_lock(&osd->lock);
req = lookup_request(&osd->o_requests, tid);
if (!req) {
dout("%s osd%d tid %llu unknown, skipping\n", __func__,
osd->o_osd, tid);
*skip = 1;
goto out_unlock_session;
}
ceph_msg_revoke_incoming(req->r_reply);
if (front_len > req->r_reply->front_alloc_len) {
pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
__func__, osd->o_osd, req->r_tid, front_len,
req->r_reply->front_alloc_len);
m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
false);
if (!m)
goto out_unlock_session;
ceph_msg_put(req->r_reply);
req->r_reply = m;
}
if (data_len > req->r_reply->data_length) {
pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
__func__, osd->o_osd, req->r_tid, data_len,
req->r_reply->data_length);
m = NULL;
*skip = 1;
goto out_unlock_session;
}
m = ceph_msg_get(req->r_reply);
dout("get_reply tid %lld %p\n", tid, m);
out_unlock_session:
mutex_unlock(&osd->lock);
out_unlock_osdc:
up_read(&osdc->lock);
return m;
}
/*
* TODO: switch to a msg-owned pagelist
*/
static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr)
{
struct ceph_msg *m;
int type = le16_to_cpu(hdr->type);
u32 front_len = le32_to_cpu(hdr->front_len);
u32 data_len = le32_to_cpu(hdr->data_len);
m = ceph_msg_new(type, front_len, GFP_NOIO, false);
if (!m)
return NULL;
if (data_len) {
struct page **pages;
struct ceph_osd_data osd_data;
pages = ceph_alloc_page_vector(calc_pages_for(0, data_len),
GFP_NOIO);
if (IS_ERR(pages)) {
ceph_msg_put(m);
return NULL;
}
ceph_osd_data_pages_init(&osd_data, pages, data_len, 0, false,
false);
ceph_osdc_msg_data_add(m, &osd_data);
}
return m;
}
static struct ceph_msg *alloc_msg(struct ceph_connection *con,
struct ceph_msg_header *hdr,
int *skip)
{
struct ceph_osd *osd = con->private;
int type = le16_to_cpu(hdr->type);
*skip = 0;
switch (type) {
case CEPH_MSG_OSD_MAP:
case CEPH_MSG_OSD_BACKOFF:
case CEPH_MSG_WATCH_NOTIFY:
return alloc_msg_with_page_vector(hdr);
case CEPH_MSG_OSD_OPREPLY:
return get_reply(con, hdr, skip);
default:
pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
osd->o_osd, type);
*skip = 1;
return NULL;
}
}
/*
* Wrappers to refcount containing ceph_osd struct
*/
static struct ceph_connection *get_osd_con(struct ceph_connection *con)
{
struct ceph_osd *osd = con->private;
if (get_osd(osd))
return con;
return NULL;
}
static void put_osd_con(struct ceph_connection *con)
{
struct ceph_osd *osd = con->private;
put_osd(osd);
}
/*
* authentication
*/
/*
* Note: returned pointer is the address of a structure that's
* managed separately. Caller must *not* attempt to free it.
*/
static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
int *proto, int force_new)
{
struct ceph_osd *o = con->private;
struct ceph_osd_client *osdc = o->o_osdc;
struct ceph_auth_client *ac = osdc->client->monc.auth;
struct ceph_auth_handshake *auth = &o->o_auth;
if (force_new && auth->authorizer) {
ceph_auth_destroy_authorizer(auth->authorizer);
auth->authorizer = NULL;
}
if (!auth->authorizer) {
int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
auth);
if (ret)
return ERR_PTR(ret);
} else {
int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
auth);
if (ret)
return ERR_PTR(ret);
}
*proto = ac->protocol;
return auth;
}
static int verify_authorizer_reply(struct ceph_connection *con)
{
struct ceph_osd *o = con->private;
struct ceph_osd_client *osdc = o->o_osdc;
struct ceph_auth_client *ac = osdc->client->monc.auth;
return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer);
}
static int invalidate_authorizer(struct ceph_connection *con)
{
struct ceph_osd *o = con->private;
struct ceph_osd_client *osdc = o->o_osdc;
struct ceph_auth_client *ac = osdc->client->monc.auth;
ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
return ceph_monc_validate_auth(&osdc->client->monc);
}
static void osd_reencode_message(struct ceph_msg *msg)
{
int type = le16_to_cpu(msg->hdr.type);
if (type == CEPH_MSG_OSD_OP)
encode_request_finish(msg);
}
static int osd_sign_message(struct ceph_msg *msg)
{
struct ceph_osd *o = msg->con->private;
struct ceph_auth_handshake *auth = &o->o_auth;
return ceph_auth_sign_message(auth, msg);
}
static int osd_check_message_signature(struct ceph_msg *msg)
{
struct ceph_osd *o = msg->con->private;
struct ceph_auth_handshake *auth = &o->o_auth;
return ceph_auth_check_message_signature(auth, msg);
}
static const struct ceph_connection_operations osd_con_ops = {
.get = get_osd_con,
.put = put_osd_con,
.dispatch = dispatch,
.get_authorizer = get_authorizer,
.verify_authorizer_reply = verify_authorizer_reply,
.invalidate_authorizer = invalidate_authorizer,
.alloc_msg = alloc_msg,
.reencode_message = osd_reencode_message,
.sign_message = osd_sign_message,
.check_message_signature = osd_check_message_signature,
.fault = osd_fault,
};
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