diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/ceph/Makefile | 1 | ||||
| -rw-r--r-- | net/ceph/auth.c | 13 | ||||
| -rw-r--r-- | net/ceph/auth_none.c | 2 | ||||
| -rw-r--r-- | net/ceph/ceph_common.c | 13 | ||||
| -rw-r--r-- | net/ceph/ceph_strings.c | 1 | ||||
| -rw-r--r-- | net/ceph/cls_lock_client.c | 325 | ||||
| -rw-r--r-- | net/ceph/crush/mapper.c | 17 | ||||
| -rw-r--r-- | net/ceph/mon_client.c | 82 | ||||
| -rw-r--r-- | net/ceph/osd_client.c | 169 |
9 files changed, 607 insertions, 16 deletions
diff --git a/net/ceph/Makefile b/net/ceph/Makefile index 84cbed630c4b..6a5180903e7b 100644 --- a/net/ceph/Makefile +++ b/net/ceph/Makefile @@ -5,6 +5,7 @@ obj-$(CONFIG_CEPH_LIB) += libceph.o libceph-y := ceph_common.o messenger.o msgpool.o buffer.o pagelist.o \ mon_client.o \ + cls_lock_client.o \ osd_client.o osdmap.o crush/crush.o crush/mapper.o crush/hash.o \ debugfs.o \ auth.o auth_none.o \ diff --git a/net/ceph/auth.c b/net/ceph/auth.c index 2bc5965fdd1e..c822b3ae1bd3 100644 --- a/net/ceph/auth.c +++ b/net/ceph/auth.c @@ -82,7 +82,10 @@ void ceph_auth_reset(struct ceph_auth_client *ac) mutex_unlock(&ac->mutex); } -int ceph_entity_name_encode(const char *name, void **p, void *end) +/* + * EntityName, not to be confused with entity_name_t + */ +int ceph_auth_entity_name_encode(const char *name, void **p, void *end) { int len = strlen(name); @@ -111,7 +114,7 @@ int ceph_auth_build_hello(struct ceph_auth_client *ac, void *buf, size_t len) monhdr->session_mon = cpu_to_le16(-1); monhdr->session_mon_tid = 0; - ceph_encode_32(&p, 0); /* no protocol, yet */ + ceph_encode_32(&p, CEPH_AUTH_UNKNOWN); /* no protocol, yet */ lenp = p; p += sizeof(u32); @@ -124,7 +127,7 @@ int ceph_auth_build_hello(struct ceph_auth_client *ac, void *buf, size_t len) for (i = 0; i < num; i++) ceph_encode_32(&p, supported_protocols[i]); - ret = ceph_entity_name_encode(ac->name, &p, end); + ret = ceph_auth_entity_name_encode(ac->name, &p, end); if (ret < 0) goto out; ceph_decode_need(&p, end, sizeof(u64), bad); @@ -259,9 +262,7 @@ int ceph_build_auth(struct ceph_auth_client *ac, int ret = 0; mutex_lock(&ac->mutex); - if (!ac->protocol) - ret = ceph_auth_build_hello(ac, msg_buf, msg_len); - else if (ac->ops->should_authenticate(ac)) + if (ac->ops->should_authenticate(ac)) ret = ceph_build_auth_request(ac, msg_buf, msg_len); mutex_unlock(&ac->mutex); return ret; diff --git a/net/ceph/auth_none.c b/net/ceph/auth_none.c index 5f836f02ae36..df45e467c81f 100644 --- a/net/ceph/auth_none.c +++ b/net/ceph/auth_none.c @@ -46,7 +46,7 @@ static int ceph_auth_none_build_authorizer(struct ceph_auth_client *ac, int ret; ceph_encode_8_safe(&p, end, 1, e_range); - ret = ceph_entity_name_encode(ac->name, &p, end); + ret = ceph_auth_entity_name_encode(ac->name, &p, end); if (ret < 0) return ret; diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c index bddfcf6f09c2..464e88599b9d 100644 --- a/net/ceph/ceph_common.c +++ b/net/ceph/ceph_common.c @@ -566,11 +566,17 @@ int ceph_print_client_options(struct seq_file *m, struct ceph_client *client) } EXPORT_SYMBOL(ceph_print_client_options); -u64 ceph_client_id(struct ceph_client *client) +struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client) +{ + return &client->msgr.inst.addr; +} +EXPORT_SYMBOL(ceph_client_addr); + +u64 ceph_client_gid(struct ceph_client *client) { return client->monc.auth->global_id; } -EXPORT_SYMBOL(ceph_client_id); +EXPORT_SYMBOL(ceph_client_gid); /* * create a fresh client instance @@ -685,7 +691,8 @@ int __ceph_open_session(struct ceph_client *client, unsigned long started) return client->auth_err; } - pr_info("client%llu fsid %pU\n", ceph_client_id(client), &client->fsid); + pr_info("client%llu fsid %pU\n", ceph_client_gid(client), + &client->fsid); ceph_debugfs_client_init(client); return 0; diff --git a/net/ceph/ceph_strings.c b/net/ceph/ceph_strings.c index 3773a4fa11e3..19b7d8aa915c 100644 --- a/net/ceph/ceph_strings.c +++ b/net/ceph/ceph_strings.c @@ -15,6 +15,7 @@ const char *ceph_entity_type_name(int type) default: return "unknown"; } } +EXPORT_SYMBOL(ceph_entity_type_name); const char *ceph_osd_op_name(int op) { diff --git a/net/ceph/cls_lock_client.c b/net/ceph/cls_lock_client.c new file mode 100644 index 000000000000..50f040fdb2a9 --- /dev/null +++ b/net/ceph/cls_lock_client.c @@ -0,0 +1,325 @@ +#include <linux/ceph/ceph_debug.h> + +#include <linux/types.h> +#include <linux/slab.h> + +#include <linux/ceph/cls_lock_client.h> +#include <linux/ceph/decode.h> + +/** + * ceph_cls_lock - grab rados lock for object + * @oid, @oloc: object to lock + * @lock_name: the name of the lock + * @type: lock type (CEPH_CLS_LOCK_EXCLUSIVE or CEPH_CLS_LOCK_SHARED) + * @cookie: user-defined identifier for this instance of the lock + * @tag: user-defined tag + * @desc: user-defined lock description + * @flags: lock flags + * + * All operations on the same lock should use the same tag. + */ +int ceph_cls_lock(struct ceph_osd_client *osdc, + struct ceph_object_id *oid, + struct ceph_object_locator *oloc, + char *lock_name, u8 type, char *cookie, + char *tag, char *desc, u8 flags) +{ + int lock_op_buf_size; + int name_len = strlen(lock_name); + int cookie_len = strlen(cookie); + int tag_len = strlen(tag); + int desc_len = strlen(desc); + void *p, *end; + struct page *lock_op_page; + struct timespec mtime; + int ret; + + lock_op_buf_size = name_len + sizeof(__le32) + + cookie_len + sizeof(__le32) + + tag_len + sizeof(__le32) + + desc_len + sizeof(__le32) + + sizeof(struct ceph_timespec) + + /* flag and type */ + sizeof(u8) + sizeof(u8) + + CEPH_ENCODING_START_BLK_LEN; + if (lock_op_buf_size > PAGE_SIZE) + return -E2BIG; + + lock_op_page = alloc_page(GFP_NOIO); + if (!lock_op_page) + return -ENOMEM; + + p = page_address(lock_op_page); + end = p + lock_op_buf_size; + + /* encode cls_lock_lock_op struct */ + ceph_start_encoding(&p, 1, 1, + lock_op_buf_size - CEPH_ENCODING_START_BLK_LEN); + ceph_encode_string(&p, end, lock_name, name_len); + ceph_encode_8(&p, type); + ceph_encode_string(&p, end, cookie, cookie_len); + ceph_encode_string(&p, end, tag, tag_len); + ceph_encode_string(&p, end, desc, desc_len); + /* only support infinite duration */ + memset(&mtime, 0, sizeof(mtime)); + ceph_encode_timespec(p, &mtime); + p += sizeof(struct ceph_timespec); + ceph_encode_8(&p, flags); + + dout("%s lock_name %s type %d cookie %s tag %s desc %s flags 0x%x\n", + __func__, lock_name, type, cookie, tag, desc, flags); + ret = ceph_osdc_call(osdc, oid, oloc, "lock", "lock", + CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK, + lock_op_page, lock_op_buf_size, NULL, NULL); + + dout("%s: status %d\n", __func__, ret); + __free_page(lock_op_page); + return ret; +} +EXPORT_SYMBOL(ceph_cls_lock); + +/** + * ceph_cls_unlock - release rados lock for object + * @oid, @oloc: object to lock + * @lock_name: the name of the lock + * @cookie: user-defined identifier for this instance of the lock + */ +int ceph_cls_unlock(struct ceph_osd_client *osdc, + struct ceph_object_id *oid, + struct ceph_object_locator *oloc, + char *lock_name, char *cookie) +{ + int unlock_op_buf_size; + int name_len = strlen(lock_name); + int cookie_len = strlen(cookie); + void *p, *end; + struct page *unlock_op_page; + int ret; + + unlock_op_buf_size = name_len + sizeof(__le32) + + cookie_len + sizeof(__le32) + + CEPH_ENCODING_START_BLK_LEN; + if (unlock_op_buf_size > PAGE_SIZE) + return -E2BIG; + + unlock_op_page = alloc_page(GFP_NOIO); + if (!unlock_op_page) + return -ENOMEM; + + p = page_address(unlock_op_page); + end = p + unlock_op_buf_size; + + /* encode cls_lock_unlock_op struct */ + ceph_start_encoding(&p, 1, 1, + unlock_op_buf_size - CEPH_ENCODING_START_BLK_LEN); + ceph_encode_string(&p, end, lock_name, name_len); + ceph_encode_string(&p, end, cookie, cookie_len); + + dout("%s lock_name %s cookie %s\n", __func__, lock_name, cookie); + ret = ceph_osdc_call(osdc, oid, oloc, "lock", "unlock", + CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK, + unlock_op_page, unlock_op_buf_size, NULL, NULL); + + dout("%s: status %d\n", __func__, ret); + __free_page(unlock_op_page); + return ret; +} +EXPORT_SYMBOL(ceph_cls_unlock); + +/** + * ceph_cls_break_lock - release rados lock for object for specified client + * @oid, @oloc: object to lock + * @lock_name: the name of the lock + * @cookie: user-defined identifier for this instance of the lock + * @locker: current lock owner + */ +int ceph_cls_break_lock(struct ceph_osd_client *osdc, + struct ceph_object_id *oid, + struct ceph_object_locator *oloc, + char *lock_name, char *cookie, + struct ceph_entity_name *locker) +{ + int break_op_buf_size; + int name_len = strlen(lock_name); + int cookie_len = strlen(cookie); + struct page *break_op_page; + void *p, *end; + int ret; + + break_op_buf_size = name_len + sizeof(__le32) + + cookie_len + sizeof(__le32) + + sizeof(u8) + sizeof(__le64) + + CEPH_ENCODING_START_BLK_LEN; + if (break_op_buf_size > PAGE_SIZE) + return -E2BIG; + + break_op_page = alloc_page(GFP_NOIO); + if (!break_op_page) + return -ENOMEM; + + p = page_address(break_op_page); + end = p + break_op_buf_size; + + /* encode cls_lock_break_op struct */ + ceph_start_encoding(&p, 1, 1, + break_op_buf_size - CEPH_ENCODING_START_BLK_LEN); + ceph_encode_string(&p, end, lock_name, name_len); + ceph_encode_copy(&p, locker, sizeof(*locker)); + ceph_encode_string(&p, end, cookie, cookie_len); + + dout("%s lock_name %s cookie %s locker %s%llu\n", __func__, lock_name, + cookie, ENTITY_NAME(*locker)); + ret = ceph_osdc_call(osdc, oid, oloc, "lock", "break_lock", + CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK, + break_op_page, break_op_buf_size, NULL, NULL); + + dout("%s: status %d\n", __func__, ret); + __free_page(break_op_page); + return ret; +} +EXPORT_SYMBOL(ceph_cls_break_lock); + +void ceph_free_lockers(struct ceph_locker *lockers, u32 num_lockers) +{ + int i; + + for (i = 0; i < num_lockers; i++) + kfree(lockers[i].id.cookie); + kfree(lockers); +} +EXPORT_SYMBOL(ceph_free_lockers); + +static int decode_locker(void **p, void *end, struct ceph_locker *locker) +{ + u8 struct_v; + u32 len; + char *s; + int ret; + + ret = ceph_start_decoding(p, end, 1, "locker_id_t", &struct_v, &len); + if (ret) + return ret; + + ceph_decode_copy(p, &locker->id.name, sizeof(locker->id.name)); + s = ceph_extract_encoded_string(p, end, NULL, GFP_NOIO); + if (IS_ERR(s)) + return PTR_ERR(s); + + locker->id.cookie = s; + + ret = ceph_start_decoding(p, end, 1, "locker_info_t", &struct_v, &len); + if (ret) + return ret; + + *p += sizeof(struct ceph_timespec); /* skip expiration */ + ceph_decode_copy(p, &locker->info.addr, sizeof(locker->info.addr)); + ceph_decode_addr(&locker->info.addr); + len = ceph_decode_32(p); + *p += len; /* skip description */ + + dout("%s %s%llu cookie %s addr %s\n", __func__, + ENTITY_NAME(locker->id.name), locker->id.cookie, + ceph_pr_addr(&locker->info.addr.in_addr)); + return 0; +} + +static int decode_lockers(void **p, void *end, u8 *type, char **tag, + struct ceph_locker **lockers, u32 *num_lockers) +{ + u8 struct_v; + u32 struct_len; + char *s; + int i; + int ret; + + ret = ceph_start_decoding(p, end, 1, "cls_lock_get_info_reply", + &struct_v, &struct_len); + if (ret) + return ret; + + *num_lockers = ceph_decode_32(p); + *lockers = kcalloc(*num_lockers, sizeof(**lockers), GFP_NOIO); + if (!*lockers) + return -ENOMEM; + + for (i = 0; i < *num_lockers; i++) { + ret = decode_locker(p, end, *lockers + i); + if (ret) + goto err_free_lockers; + } + + *type = ceph_decode_8(p); + s = ceph_extract_encoded_string(p, end, NULL, GFP_NOIO); + if (IS_ERR(s)) { + ret = PTR_ERR(s); + goto err_free_lockers; + } + + *tag = s; + return 0; + +err_free_lockers: + ceph_free_lockers(*lockers, *num_lockers); + return ret; +} + +/* + * On success, the caller is responsible for: + * + * kfree(tag); + * ceph_free_lockers(lockers, num_lockers); + */ +int ceph_cls_lock_info(struct ceph_osd_client *osdc, + struct ceph_object_id *oid, + struct ceph_object_locator *oloc, + char *lock_name, u8 *type, char **tag, + struct ceph_locker **lockers, u32 *num_lockers) +{ + int get_info_op_buf_size; + int name_len = strlen(lock_name); + struct page *get_info_op_page, *reply_page; + size_t reply_len; + void *p, *end; + int ret; + + get_info_op_buf_size = name_len + sizeof(__le32) + + CEPH_ENCODING_START_BLK_LEN; + if (get_info_op_buf_size > PAGE_SIZE) + return -E2BIG; + + get_info_op_page = alloc_page(GFP_NOIO); + if (!get_info_op_page) + return -ENOMEM; + + reply_page = alloc_page(GFP_NOIO); + if (!reply_page) { + __free_page(get_info_op_page); + return -ENOMEM; + } + + p = page_address(get_info_op_page); + end = p + get_info_op_buf_size; + + /* encode cls_lock_get_info_op struct */ + ceph_start_encoding(&p, 1, 1, + get_info_op_buf_size - CEPH_ENCODING_START_BLK_LEN); + ceph_encode_string(&p, end, lock_name, name_len); + + dout("%s lock_name %s\n", __func__, lock_name); + ret = ceph_osdc_call(osdc, oid, oloc, "lock", "get_info", + CEPH_OSD_FLAG_READ, get_info_op_page, + get_info_op_buf_size, reply_page, &reply_len); + + dout("%s: status %d\n", __func__, ret); + if (ret >= 0) { + p = page_address(reply_page); + end = p + reply_len; + + ret = decode_lockers(&p, end, type, tag, lockers, num_lockers); + } + + __free_page(get_info_op_page); + __free_page(reply_page); + return ret; +} +EXPORT_SYMBOL(ceph_cls_lock_info); diff --git a/net/ceph/crush/mapper.c b/net/ceph/crush/mapper.c index 5fcfb98f309e..a421e905331a 100644 --- a/net/ceph/crush/mapper.c +++ b/net/ceph/crush/mapper.c @@ -245,7 +245,7 @@ static int bucket_straw_choose(struct crush_bucket_straw *bucket, /* compute 2^44*log2(input+1) */ static __u64 crush_ln(unsigned int xin) { - unsigned int x = xin, x1; + unsigned int x = xin; int iexpon, index1, index2; __u64 RH, LH, LL, xl64, result; @@ -253,9 +253,15 @@ static __u64 crush_ln(unsigned int xin) /* normalize input */ iexpon = 15; - while (!(x & 0x18000)) { - x <<= 1; - iexpon--; + + /* + * figure out number of bits we need to shift and + * do it in one step instead of iteratively + */ + if (!(x & 0x18000)) { + int bits = __builtin_clz(x & 0x1FFFF) - 16; + x <<= bits; + iexpon = 15 - bits; } index1 = (x >> 8) << 1; @@ -267,12 +273,11 @@ static __u64 crush_ln(unsigned int xin) /* RH*x ~ 2^48 * (2^15 + xf), xf<2^8 */ xl64 = (__s64)x * RH; xl64 >>= 48; - x1 = xl64; result = iexpon; result <<= (12 + 32); - index2 = x1 & 0xff; + index2 = xl64 & 0xff; /* LL ~ 2^48*log2(1.0+index2/2^15) */ LL = __LL_tbl[index2]; diff --git a/net/ceph/mon_client.c b/net/ceph/mon_client.c index ef34a02719d7..a8effc8b7280 100644 --- a/net/ceph/mon_client.c +++ b/net/ceph/mon_client.c @@ -835,6 +835,83 @@ int ceph_monc_get_version_async(struct ceph_mon_client *monc, const char *what, } EXPORT_SYMBOL(ceph_monc_get_version_async); +static void handle_command_ack(struct ceph_mon_client *monc, + struct ceph_msg *msg) +{ + struct ceph_mon_generic_request *req; + void *p = msg->front.iov_base; + void *const end = p + msg->front_alloc_len; + u64 tid = le64_to_cpu(msg->hdr.tid); + + dout("%s msg %p tid %llu\n", __func__, msg, tid); + + ceph_decode_need(&p, end, sizeof(struct ceph_mon_request_header) + + sizeof(u32), bad); + p += sizeof(struct ceph_mon_request_header); + + mutex_lock(&monc->mutex); + req = lookup_generic_request(&monc->generic_request_tree, tid); + if (!req) { + mutex_unlock(&monc->mutex); + return; + } + + req->result = ceph_decode_32(&p); + __finish_generic_request(req); + mutex_unlock(&monc->mutex); + + complete_generic_request(req); + return; + +bad: + pr_err("corrupt mon_command ack, tid %llu\n", tid); + ceph_msg_dump(msg); +} + +int ceph_monc_blacklist_add(struct ceph_mon_client *monc, + struct ceph_entity_addr *client_addr) +{ + struct ceph_mon_generic_request *req; + struct ceph_mon_command *h; + int ret = -ENOMEM; + int len; + + req = alloc_generic_request(monc, GFP_NOIO); + if (!req) + goto out; + + req->request = ceph_msg_new(CEPH_MSG_MON_COMMAND, 256, GFP_NOIO, true); + if (!req->request) + goto out; + + req->reply = ceph_msg_new(CEPH_MSG_MON_COMMAND_ACK, 512, GFP_NOIO, + true); + if (!req->reply) + goto out; + + mutex_lock(&monc->mutex); + register_generic_request(req); + h = req->request->front.iov_base; + h->monhdr.have_version = 0; + h->monhdr.session_mon = cpu_to_le16(-1); + h->monhdr.session_mon_tid = 0; + h->fsid = monc->monmap->fsid; + h->num_strs = cpu_to_le32(1); + len = sprintf(h->str, "{ \"prefix\": \"osd blacklist\", \ + \"blacklistop\": \"add\", \ + \"addr\": \"%pISpc/%u\" }", + &client_addr->in_addr, le32_to_cpu(client_addr->nonce)); + h->str_len = cpu_to_le32(len); + send_generic_request(monc, req); + mutex_unlock(&monc->mutex); + + ret = wait_generic_request(req); +out: + put_generic_request(req); + return ret; +} +EXPORT_SYMBOL(ceph_monc_blacklist_add); + /* * Resend pending generic requests. */ @@ -1139,6 +1216,10 @@ static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) handle_get_version_reply(monc, msg); break; + case CEPH_MSG_MON_COMMAND_ACK: + handle_command_ack(monc, msg); + break; + case CEPH_MSG_MON_MAP: ceph_monc_handle_map(monc, msg); break; @@ -1178,6 +1259,7 @@ static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con, m = ceph_msg_get(monc->m_subscribe_ack); break; case CEPH_MSG_STATFS_REPLY: + case CEPH_MSG_MON_COMMAND_ACK: return get_generic_reply(con, hdr, skip); case CEPH_MSG_AUTH_REPLY: m = ceph_msg_get(monc->m_auth_reply); diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c index a97e7b506612..d9bf7a1d0a58 100644 --- a/net/ceph/osd_client.c +++ b/net/ceph/osd_client.c @@ -338,6 +338,9 @@ static void osd_req_op_data_release(struct ceph_osd_request *osd_req, 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; } @@ -863,6 +866,8 @@ static u32 osd_req_encode_op(struct ceph_osd_op *dst, 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); @@ -1445,6 +1450,10 @@ static void setup_request_data(struct ceph_osd_request *req, 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: @@ -3891,12 +3900,121 @@ int ceph_osdc_watch_check(struct ceph_osd_client *osdc, 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); @@ -3910,6 +4028,57 @@ void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc) EXPORT_SYMBOL(ceph_osdc_maybe_request_map); /* + * Execute an OSD class method on an object. + * + * @flags: CEPH_OSD_FLAG_* + * @resp_len: 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; + + req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); + if (!req) + return -ENOMEM; + + ceph_oid_copy(&req->r_base_oid, oid); + ceph_oloc_copy(&req->r_base_oloc, oloc); + req->r_flags = flags; + + ret = ceph_osdc_alloc_messages(req, GFP_NOIO); + if (ret) + goto out_put_req; + + osd_req_op_cls_init(req, 0, CEPH_OSD_OP_CALL, class, method); + if (req_page) + osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len, + 0, false, false); + if (resp_page) + osd_req_op_cls_response_data_pages(req, 0, &resp_page, + PAGE_SIZE, 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) |