static int add_new_disk_start(struct mddev *mddev, struct md_rdev *rdev) { struct md_cluster_info *cinfo = mddev->cluster_info; struct cluster_msg cmsg; int ret = 0; struct mdp_superblock_1 *sb = page_address(rdev->sb_page); char *uuid = sb->device_uuid; memset(&cmsg, 0, sizeof(cmsg)); cmsg.type = cpu_to_le32(NEWDISK); memcpy(cmsg.uuid, uuid, 16); cmsg.raid_slot = rdev->desc_nr; lock_comm(cinfo); ret = __sendmsg(cinfo, &cmsg); if (ret) return ret; cinfo->no_new_dev_lockres->flags |= DLM_LKF_NOQUEUE; ret = dlm_lock_sync(cinfo->no_new_dev_lockres, DLM_LOCK_EX); cinfo->no_new_dev_lockres->flags &= ~DLM_LKF_NOQUEUE; /* Some node does not "see" the device */ if (ret == -EAGAIN) ret = -ENOENT; else dlm_lock_sync(cinfo->no_new_dev_lockres, DLM_LOCK_CR); return ret; }
static int sendmsg(struct md_cluster_info *cinfo, struct cluster_msg *cmsg) { int ret; lock_comm(cinfo); ret = __sendmsg(cinfo, cmsg); unlock_comm(cinfo); return ret; }
/* add_new_disk() - initiates a disk add * However, if this fails before writing md_update_sb(), * add_new_disk_cancel() must be called to release token lock */ static int add_new_disk(struct mddev *mddev, struct md_rdev *rdev) { struct md_cluster_info *cinfo = mddev->cluster_info; struct cluster_msg cmsg; int ret = 0; struct mdp_superblock_1 *sb = page_address(rdev->sb_page); char *uuid = sb->device_uuid; memset(&cmsg, 0, sizeof(cmsg)); cmsg.type = cpu_to_le32(NEWDISK); memcpy(cmsg.uuid, uuid, 16); cmsg.raid_slot = cpu_to_le32(rdev->desc_nr); lock_comm(cinfo); ret = __sendmsg(cinfo, &cmsg); if (ret) return ret; cinfo->no_new_dev_lockres->flags |= DLM_LKF_NOQUEUE; ret = dlm_lock_sync(cinfo->no_new_dev_lockres, DLM_LOCK_EX); cinfo->no_new_dev_lockres->flags &= ~DLM_LKF_NOQUEUE; /* Some node does not "see" the device */ if (ret == -EAGAIN) ret = -ENOENT; if (ret) unlock_comm(cinfo); else { dlm_lock_sync(cinfo->no_new_dev_lockres, DLM_LOCK_CR); /* Since MD_CHANGE_DEVS will be set in add_bound_rdev which * will run soon after add_new_disk, the below path will be * invoked: * md_wakeup_thread(mddev->thread) * -> conf->thread (raid1d) * -> md_check_recovery -> md_update_sb * -> metadata_update_start/finish * MD_CLUSTER_SEND_LOCKED_ALREADY will be cleared eventually. * * For other failure cases, metadata_update_cancel and * add_new_disk_cancel also clear below bit as well. * */ set_bit(MD_CLUSTER_SEND_LOCKED_ALREADY, &cinfo->state); wake_up(&cinfo->wait); } return ret; }
static int metadata_update_start(struct mddev *mddev) { return lock_comm(mddev->cluster_info); }