blob: e6ae15bc41b74dfc96e9d967139367b4ad3be952 [file] [log] [blame]
#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/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);
#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->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->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,
atomic_read(&req->r_kref.refcount));
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,
atomic_read(&req->r_kref.refcount));
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);
init_completion(&req->r_safe_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(atomic_read(&req->r_kref.refcount) != 1);
request_release_checks(req);
WARN_ON(atomic_read(&request_msg->kref.refcount) != 1);
WARN_ON(atomic_read(&reply_msg->kref.refcount) != 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(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 = 4 + 4 + 4; /* client_inc, osdmap_epoch, flags */
msg_size += 4 + 4 + 4 + 8; /* mtime, reassert_version */
msg_size += CEPH_ENCODING_START_BLK_LEN +
ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */
msg_size += 1 + 8 + 4 + 4; /* pgid */
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; /* retry_attempt */
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;
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_STARTSYNC:
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.)
*
* if @do_sync, include a 'startsync' command so that the osd will flush
* data quickly.
*/
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_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)
{
atomic_set(&osd->o_ref, 1);
RB_CLEAR_NODE(&osd->o_node);
osd->o_requests = RB_ROOT;
osd->o_linger_requests = 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(!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 (atomic_inc_not_zero(&osd->o_ref)) {
dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
atomic_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, atomic_read(&osd->o_ref),
atomic_read(&osd->o_ref) - 1);
if (atomic_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);
}
__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->base_oloc.pool);
return (t->flags & CEPH_OSD_FLAG_READ && pauserd) ||
(t->flags & CEPH_OSD_FLAG_WRITE && pausewr);
}
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,
u32 *last_force_resend,
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 need_check_tiering = false;
bool need_resend = false;
bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE);
enum calc_target_result ct_res;
int ret;
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 (last_force_resend &&
*last_force_resend < pi->last_force_request_resend) {
*last_force_resend = pi->last_force_request_resend;
force_resend = true;
} else if (!last_force_resend) {
force_resend = true;
}
}
if (ceph_oid_empty(&t->target_oid) || force_resend) {
ceph_oid_copy(&t->target_oid, &t->base_oid);
need_check_tiering = true;
}
if (ceph_oloc_empty(&t->target_oloc) || force_resend) {
ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
need_check_tiering = true;
}
if (need_check_tiering &&
(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;
}
ret = ceph_object_locator_to_pg(osdc->osdmap, &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, &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,
&last_pgid))
force_resend = true;
if (t->paused && !target_should_be_paused(osdc, t, pi)) {
t->paused = false;
need_resend = true;
}
if (ceph_pg_compare(&t->pgid, &pgid) ||
ceph_osds_changed(&t->acting, &acting, any_change) ||
force_resend) {
t->pgid = pgid; /* struct */
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->osd = acting.primary;
need_resend = true;
}
ct_res = need_resend ? CALC_TARGET_NEED_RESEND : 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 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_request(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);
ceph_encode_32(&p, 1); /* client_inc, always 1 */
ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
ceph_encode_32(&p, req->r_flags);
ceph_encode_timespec(p, &req->r_mtime);
p += sizeof(struct ceph_timespec);
/* aka reassert_version */
memcpy(p, &req->r_replay_version, sizeof(req->r_replay_version));
p += sizeof(req->r_replay_version);
/* oloc */
ceph_start_encoding(&p, 5, 4,
ceph_oloc_encoding_size(&req->r_t.target_oloc));
ceph_encode_64(&p, req->r_t.target_oloc.pool);
ceph_encode_32(&p, -1); /* preferred */
ceph_encode_32(&p, 0); /* key len */
if (req->r_t.target_oloc.pool_ns)
ceph_encode_string(&p, end, req->r_t.target_oloc.pool_ns->str,
req->r_t.target_oloc.pool_ns->len);
else
ceph_encode_32(&p, 0);
/* pgid */
ceph_encode_8(&p, 1);
ceph_encode_64(&p, req->r_t.pgid.pool);
ceph_encode_32(&p, req->r_t.pgid.seed);
ceph_encode_32(&p, -1); /* preferred */
/* oid */
ceph_encode_32(&p, req->r_t.target_oid.name_len);
memcpy(p, req->r_t.target_oid.name, req->r_t.target_oid.name_len);
p += 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);
msg->front.iov_len = p - msg->front.iov_base;
msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
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 oid %s oid_len %d front %zu data %u\n", __func__,
req, req->r_t.target_oid.name, req->r_t.target_oid.name_len,
msg->front.iov_len, data_len);
}
/*
* @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);
/*
* 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(req, req->r_request);
dout("%s req %p tid %llu to pg %llu.%x osd%d flags 0x%x attempt %d\n",
__func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
req->r_t.osd, 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 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;
WARN_ON(req->r_tid || req->r_got_reply);
dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
again:
ct_res = calc_target(osdc, &req->r_t, &req->r_last_force_resend, 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 ((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);
} 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);
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)
{
unsigned int mask = CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK;
if (req->r_flags & CEPH_OSD_FLAG_READ) {
WARN_ON(req->r_flags & mask);
req->r_flags |= CEPH_OSD_FLAG_ACK;
} else if (req->r_flags & CEPH_OSD_FLAG_WRITE)
WARN_ON(!(req->r_flags & mask));
else
WARN_ON(1);
WARN_ON(req->r_unsafe_callback && (req->r_flags & mask) != mask);
atomic_inc(&req->r_osdc->num_requests);
}
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;
struct ceph_osd *osd = req->r_osd;
verify_osd_locked(osd);
dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
unlink_request(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 finish_request(struct ceph_osd_request *req)
{
__finish_request(req);
ceph_osdc_put_request(req);
}
static void __complete_request(struct ceph_osd_request *req)
{
if (req->r_callback)
req->r_callback(req);
else
complete_all(&req->r_completion);
}
/*
* Note that this is open-coded in handle_reply(), which has to deal
* with ack vs commit, dup acks, etc.
*/
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_safe_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);
}
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);
WARN_ON(!__linger_registered(lreq));
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, &lreq->last_force_resend, 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;
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; p = rb_next(p)) {
struct ceph_osd_request *req =
rb_entry(p, struct ceph_osd_request, r_node);
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;
}
}
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 (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;