diff options
| -rw-r--r-- | fs/ceph/mon_client.c | 170 | ||||
| -rw-r--r-- | fs/ceph/mon_client.h | 5 |
2 files changed, 158 insertions, 17 deletions
diff --git a/fs/ceph/mon_client.c b/fs/ceph/mon_client.c index 54fe01c50706..b2a5a3e4a671 100644 --- a/fs/ceph/mon_client.c +++ b/fs/ceph/mon_client.c @@ -349,7 +349,7 @@ out: } /* - * statfs + * generic requests (e.g., statfs, poolop) */ static struct ceph_mon_generic_request *__lookup_generic_req( struct ceph_mon_client *monc, u64 tid) @@ -442,6 +442,35 @@ static struct ceph_msg *get_generic_reply(struct ceph_connection *con, return m; } +static int do_generic_request(struct ceph_mon_client *monc, + struct ceph_mon_generic_request *req) +{ + int err; + + /* register request */ + mutex_lock(&monc->mutex); + req->tid = ++monc->last_tid; + req->request->hdr.tid = cpu_to_le64(req->tid); + __insert_generic_request(monc, req); + monc->num_generic_requests++; + ceph_con_send(monc->con, ceph_msg_get(req->request)); + mutex_unlock(&monc->mutex); + + err = wait_for_completion_interruptible(&req->completion); + + mutex_lock(&monc->mutex); + rb_erase(&req->node, &monc->generic_request_tree); + monc->num_generic_requests--; + mutex_unlock(&monc->mutex); + + if (!err) + err = req->result; + return err; +} + +/* + * statfs + */ static void handle_statfs_reply(struct ceph_mon_client *monc, struct ceph_msg *msg) { @@ -468,7 +497,7 @@ static void handle_statfs_reply(struct ceph_mon_client *monc, return; bad: - pr_err("corrupt generic reply, no tid\n"); + pr_err("corrupt generic reply, tid %llu\n", tid); ceph_msg_dump(msg); } @@ -487,6 +516,7 @@ int ceph_monc_do_statfs(struct ceph_mon_client *monc, struct ceph_statfs *buf) kref_init(&req->kref); req->buf = buf; + req->buf_len = sizeof(*buf); init_completion(&req->completion); err = -ENOMEM; @@ -504,33 +534,134 @@ int ceph_monc_do_statfs(struct ceph_mon_client *monc, struct ceph_statfs *buf) h->monhdr.session_mon_tid = 0; h->fsid = monc->monmap->fsid; - /* register request */ - mutex_lock(&monc->mutex); - req->tid = ++monc->last_tid; - req->request->hdr.tid = cpu_to_le64(req->tid); - __insert_generic_request(monc, req); - monc->num_generic_requests++; - mutex_unlock(&monc->mutex); + err = do_generic_request(monc, req); - /* send request and wait */ - ceph_con_send(monc->con, ceph_msg_get(req->request)); - err = wait_for_completion_interruptible(&req->completion); +out: + kref_put(&req->kref, release_generic_request); + return err; +} + +/* + * pool ops + */ +static int get_poolop_reply_buf(const char *src, size_t src_len, + char *dst, size_t dst_len) +{ + u32 buf_len; + + if (src_len != sizeof(u32) + dst_len) + return -EINVAL; + + buf_len = le32_to_cpu(*(u32 *)src); + if (buf_len != dst_len) + return -EINVAL; + + memcpy(dst, src + sizeof(u32), dst_len); + return 0; +} + +static void handle_poolop_reply(struct ceph_mon_client *monc, + struct ceph_msg *msg) +{ + struct ceph_mon_generic_request *req; + struct ceph_mon_poolop_reply *reply = msg->front.iov_base; + u64 tid = le64_to_cpu(msg->hdr.tid); + + if (msg->front.iov_len < sizeof(*reply)) + goto bad; + dout("handle_poolop_reply %p tid %llu\n", msg, tid); mutex_lock(&monc->mutex); - rb_erase(&req->node, &monc->generic_request_tree); - monc->num_generic_requests--; + req = __lookup_generic_req(monc, tid); + if (req) { + if (req->buf_len && + get_poolop_reply_buf(msg->front.iov_base + sizeof(*reply), + msg->front.iov_len - sizeof(*reply), + req->buf, req->buf_len) < 0) { + mutex_unlock(&monc->mutex); + goto bad; + } + req->result = le32_to_cpu(reply->reply_code); + get_generic_request(req); + } mutex_unlock(&monc->mutex); + if (req) { + complete(&req->completion); + put_generic_request(req); + } + return; - if (!err) - err = req->result; +bad: + pr_err("corrupt generic reply, tid %llu\n", tid); + ceph_msg_dump(msg); +} + +/* + * Do a synchronous pool op. + */ +int ceph_monc_do_poolop(struct ceph_mon_client *monc, u32 op, + u32 pool, u64 snapid, + char *buf, int len) +{ + struct ceph_mon_generic_request *req; + struct ceph_mon_poolop *h; + int err; + + req = kzalloc(sizeof(*req), GFP_NOFS); + if (!req) + return -ENOMEM; + + kref_init(&req->kref); + req->buf = buf; + req->buf_len = len; + init_completion(&req->completion); + + err = -ENOMEM; + req->request = ceph_msg_new(CEPH_MSG_POOLOP, sizeof(*h), GFP_NOFS); + if (!req->request) + goto out; + req->reply = ceph_msg_new(CEPH_MSG_POOLOP_REPLY, 1024, GFP_NOFS); + if (!req->reply) + goto out; + + /* fill out request */ + req->request->hdr.version = cpu_to_le16(2); + 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->pool = cpu_to_le32(pool); + h->op = cpu_to_le32(op); + h->auid = 0; + h->snapid = cpu_to_le64(snapid); + h->name_len = 0; + + err = do_generic_request(monc, req); out: kref_put(&req->kref, release_generic_request); return err; } +int ceph_monc_create_snapid(struct ceph_mon_client *monc, + u32 pool, u64 *snapid) +{ + return ceph_monc_do_poolop(monc, POOL_OP_CREATE_UNMANAGED_SNAP, + pool, 0, (char *)snapid, sizeof(*snapid)); + +} + +int ceph_monc_delete_snapid(struct ceph_mon_client *monc, + u32 pool, u64 snapid) +{ + return ceph_monc_do_poolop(monc, POOL_OP_CREATE_UNMANAGED_SNAP, + pool, snapid, 0, 0); + +} + /* - * Resend pending statfs requests. + * Resend pending generic requests. */ static void __resend_generic_request(struct ceph_mon_client *monc) { @@ -783,6 +914,10 @@ static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) handle_statfs_reply(monc, msg); break; + case CEPH_MSG_POOLOP_REPLY: + handle_poolop_reply(monc, msg); + break; + case CEPH_MSG_MON_MAP: ceph_monc_handle_map(monc, msg); break; @@ -820,6 +955,7 @@ static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con, case CEPH_MSG_MON_SUBSCRIBE_ACK: m = ceph_msg_get(monc->m_subscribe_ack); break; + case CEPH_MSG_POOLOP_REPLY: case CEPH_MSG_STATFS_REPLY: return get_generic_reply(con, hdr, skip); case CEPH_MSG_AUTH_REPLY: diff --git a/fs/ceph/mon_client.h b/fs/ceph/mon_client.h index 174d794321d0..8e396f2c0963 100644 --- a/fs/ceph/mon_client.h +++ b/fs/ceph/mon_client.h @@ -50,6 +50,7 @@ struct ceph_mon_generic_request { struct rb_node node; int result; void *buf; + int buf_len; struct completion completion; struct ceph_msg *request; /* original request */ struct ceph_msg *reply; /* and reply */ @@ -111,6 +112,10 @@ extern int ceph_monc_open_session(struct ceph_mon_client *monc); extern int ceph_monc_validate_auth(struct ceph_mon_client *monc); +extern int ceph_monc_create_snapid(struct ceph_mon_client *monc, + u32 pool, u64 *snapid); +extern int ceph_monc_delete_snapid(struct ceph_mon_client *monc, + u32 pool, u64 snapid); #endif |