v4.19.13 snapshot.
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
new file mode 100644
index 0000000..60934bd
--- /dev/null
+++ b/net/ceph/osd_client.c
@@ -0,0 +1,5463 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#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>
+#include <linux/ceph/striper.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;
+ u32 xlen;
+
+ /* object extent? */
+ ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
+ objoff, &xlen);
+ *objlen = xlen;
+ 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 ceph_bio_iter *bio_pos,
+ u32 bio_length)
+{
+ osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
+ osd_data->bio_pos = *bio_pos;
+ osd_data->bio_length = bio_length;
+}
+#endif /* CONFIG_BLOCK */
+
+static void ceph_osd_data_bvecs_init(struct ceph_osd_data *osd_data,
+ struct ceph_bvec_iter *bvec_pos,
+ u32 num_bvecs)
+{
+ osd_data->type = CEPH_OSD_DATA_TYPE_BVECS;
+ osd_data->bvec_pos = *bvec_pos;
+ osd_data->num_bvecs = num_bvecs;
+}
+
+#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 ceph_bio_iter *bio_pos,
+ u32 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_pos, bio_length);
+}
+EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
+#endif /* CONFIG_BLOCK */
+
+void osd_req_op_extent_osd_data_bvecs(struct ceph_osd_request *osd_req,
+ unsigned int which,
+ struct bio_vec *bvecs, u32 num_bvecs,
+ u32 bytes)
+{
+ struct ceph_osd_data *osd_data;
+ struct ceph_bvec_iter it = {
+ .bvecs = bvecs,
+ .iter = { .bi_size = bytes },
+ };
+
+ osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
+ ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs);
+}
+EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvecs);
+
+void osd_req_op_extent_osd_data_bvec_pos(struct ceph_osd_request *osd_req,
+ unsigned int which,
+ struct ceph_bvec_iter *bvec_pos)
+{
+ struct ceph_osd_data *osd_data;
+
+ osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
+ ceph_osd_data_bvecs_init(osd_data, bvec_pos, 0);
+}
+EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvec_pos);
+
+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_request_data_bvecs(struct ceph_osd_request *osd_req,
+ unsigned int which,
+ struct bio_vec *bvecs, u32 num_bvecs,
+ u32 bytes)
+{
+ struct ceph_osd_data *osd_data;
+ struct ceph_bvec_iter it = {
+ .bvecs = bvecs,
+ .iter = { .bi_size = bytes },
+ };
+
+ osd_data = osd_req_op_data(osd_req, which, cls, request_data);
+ ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs);
+ osd_req->r_ops[which].cls.indata_len += bytes;
+ osd_req->r_ops[which].indata_len += bytes;
+}
+EXPORT_SYMBOL(osd_req_op_cls_request_data_bvecs);
+
+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 */
+ case CEPH_OSD_DATA_TYPE_BVECS:
+ return osd_data->bvec_pos.iter.bi_size;
+ 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(struct_size(req, r_ops, num_ops), 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);
+
+int 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);
+ if (!pagelist)
+ return -ENOMEM;
+
+ 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;
+ return 0;
+}
+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_pos, length);
+#endif
+ } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) {
+ ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos);
+ } 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_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)
+
+/*
+ * Call @fn on each OSD request as long as @fn returns 0.
+ */
+static void for_each_request(struct ceph_osd_client *osdc,
+ int (*fn)(struct ceph_osd_request *req, void *arg),
+ void *arg)
+{
+ struct rb_node *n, *p;
+
+ for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
+ struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
+
+ 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);
+ if (fn(req, arg))
+ return;
+ }
+ }
+
+ 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);
+ if (fn(req, arg))
+ return;
+ }
+}
+
+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;
+
+ 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;
+ }
+ }
+
+ __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc, &pgid);
+ 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_timespec64(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;
+ int err = 0;
+ bool need_send = false;
+ bool promoted = 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->abort_err) {
+ dout("req %p abort_err %d\n", req, osdc->abort_err);
+ err = osdc->abort_err;
+ } else 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);
+ if (osdc->abort_on_full) {
+ err = -ENOSPC;
+ } else {
+ 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);
+ else if (err)
+ complete_request(req, err);
+ mutex_unlock(&osd->lock);
+
+ if (!err && 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)
+{
+ dout("%s req %p tid %llu cb %pf result %d\n", __func__, req,
+ req->r_tid, req->r_callback, req->r_result);
+
+ if (req->r_callback)
+ req->r_callback(req);
+ complete_all(&req->r_completion);
+ ceph_osdc_put_request(req);
+}
+
+static void complete_request_workfn(struct work_struct *work)
+{
+ struct ceph_osd_request *req =
+ container_of(work, struct ceph_osd_request, r_complete_work);
+
+ __complete_request(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);
+
+ INIT_WORK(&req->r_complete_work, complete_request_workfn);
+ queue_work(req->r_osdc->completion_wq, &req->r_complete_work);
+}
+
+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 int abort_fn(struct ceph_osd_request *req, void *arg)
+{
+ int err = *(int *)arg;
+
+ abort_request(req, err);
+ return 0; /* continue iteration */
+}
+
+/*
+ * Abort all in-flight requests with @err and arrange for all future
+ * requests to be failed immediately.
+ */
+void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err)
+{
+ dout("%s osdc %p err %d\n", __func__, osdc, err);
+ down_write(&osdc->lock);
+ for_each_request(osdc, abort_fn, &err);
+ osdc->abort_err = err;
+ up_write(&osdc->lock);
+}
+EXPORT_SYMBOL(ceph_osdc_abort_requests);
+
+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);
+
+/*
+ * We can end up releasing caps as a result of abort_request().
+ * In that case, we probably want to ensure that the cap release message
+ * has an updated epoch barrier in it, so set the epoch barrier prior to
+ * aborting the first request.
+ */
+static int abort_on_full_fn(struct ceph_osd_request *req, void *arg)
+{
+ struct ceph_osd_client *osdc = req->r_osdc;
+ bool *victims = arg;
+
+ if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
+ (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
+ pool_full(osdc, req->r_t.base_oloc.pool))) {
+ if (!*victims) {
+ update_epoch_barrier(osdc, osdc->osdmap->epoch);
+ *victims = true;
+ }
+ abort_request(req, -ENOSPC);
+ }
+
+ return 0; /* continue iteration */
+}
+
+/*
+ * 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)
+{
+ bool victims = false;
+
+ if (osdc->abort_on_full &&
+ (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || have_pool_full(osdc)))
+ for_each_request(osdc, abort_on_full_fn, &victims);
+}
+
+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);
+ 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_ts64(&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_ts64(&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,
+ u32 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,
+ u32 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, u32 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,
+ u32 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;
+
+ ret = osd_req_op_cls_init(req, 0, CEPH_OSD_OP_CALL, class, method);
+ if (ret)
+ goto out_put_req;
+
+ 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;
+
+ osdc->completion_wq = create_singlethread_workqueue("ceph-completion");
+ if (!osdc->completion_wq)
+ goto out_notify_wq;
+
+ 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_notify_wq:
+ destroy_workqueue(osdc->notify_wq);
+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)
+{
+ destroy_workqueue(osdc->completion_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 timespec64 *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 __init 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;
+}
+
+void ceph_osdc_cleanup(void)
+{
+ BUG_ON(!ceph_osd_request_cache);
+ kmem_cache_destroy(ceph_osd_request_cache);
+ ceph_osd_request_cache = NULL;
+}
+
+/*
+ * 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 add_authorizer_challenge(struct ceph_connection *con,
+ void *challenge_buf, int challenge_buf_len)
+{
+ 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_add_authorizer_challenge(ac, o->o_auth.authorizer,
+ challenge_buf, challenge_buf_len);
+}
+
+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,
+ .add_authorizer_challenge = add_authorizer_challenge,
+ .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,
+};