1f4f61d27SAneesh Kumar K.V /* 2f4f61d27SAneesh Kumar K.V * Virtio 9p backend 3f4f61d27SAneesh Kumar K.V * 4f4f61d27SAneesh Kumar K.V * Copyright IBM, Corp. 2010 5f4f61d27SAneesh Kumar K.V * 6f4f61d27SAneesh Kumar K.V * Authors: 7f4f61d27SAneesh Kumar K.V * Anthony Liguori <aliguori@us.ibm.com> 8f4f61d27SAneesh Kumar K.V * 9f4f61d27SAneesh Kumar K.V * This work is licensed under the terms of the GNU GPL, version 2. See 10f4f61d27SAneesh Kumar K.V * the COPYING file in the top-level directory. 11f4f61d27SAneesh Kumar K.V * 12f4f61d27SAneesh Kumar K.V */ 13f4f61d27SAneesh Kumar K.V 140d09e41aSPaolo Bonzini #include "hw/virtio/virtio.h" 1593b48c20SHans de Goede #include "hw/virtio/virtio-9p.h" 160d09e41aSPaolo Bonzini #include "hw/i386/pc.h" 171de7afc9SPaolo Bonzini #include "qemu/sockets.h" 18f4f61d27SAneesh Kumar K.V #include "virtio-9p.h" 19f4f61d27SAneesh Kumar K.V #include "fsdev/qemu-fsdev.h" 20f4f61d27SAneesh Kumar K.V #include "virtio-9p-xattr.h" 2139c0564eSVenkateswararao Jujjuri (JV) #include "virtio-9p-coth.h" 22*d64ccb91SGreg Kurz #include "hw/virtio/virtio-access.h" 23f4f61d27SAneesh Kumar K.V 24f4f61d27SAneesh Kumar K.V static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features) 25f4f61d27SAneesh Kumar K.V { 26f4f61d27SAneesh Kumar K.V features |= 1 << VIRTIO_9P_MOUNT_TAG; 27f4f61d27SAneesh Kumar K.V return features; 28f4f61d27SAneesh Kumar K.V } 29f4f61d27SAneesh Kumar K.V 30f4f61d27SAneesh Kumar K.V static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config) 31f4f61d27SAneesh Kumar K.V { 32e9a0152bSAneesh Kumar K.V int len; 33f4f61d27SAneesh Kumar K.V struct virtio_9p_config *cfg; 3413daf6caSKONRAD Frederic V9fsState *s = VIRTIO_9P(vdev); 35f4f61d27SAneesh Kumar K.V 36e9a0152bSAneesh Kumar K.V len = strlen(s->tag); 37e9a0152bSAneesh Kumar K.V cfg = g_malloc0(sizeof(struct virtio_9p_config) + len); 38*d64ccb91SGreg Kurz virtio_stw_p(vdev, &cfg->tag_len, len); 39e9a0152bSAneesh Kumar K.V /* We don't copy the terminating null to config space */ 40e9a0152bSAneesh Kumar K.V memcpy(cfg->tag, s->tag, len); 41f4f61d27SAneesh Kumar K.V memcpy(config, cfg, s->config_size); 427267c094SAnthony Liguori g_free(cfg); 43f4f61d27SAneesh Kumar K.V } 44f4f61d27SAneesh Kumar K.V 4559be7522SAndreas Färber static void virtio_9p_device_realize(DeviceState *dev, Error **errp) 46f4f61d27SAneesh Kumar K.V { 4759be7522SAndreas Färber VirtIODevice *vdev = VIRTIO_DEVICE(dev); 4859be7522SAndreas Färber V9fsState *s = VIRTIO_9P(dev); 49f4f61d27SAneesh Kumar K.V int i, len; 50f4f61d27SAneesh Kumar K.V struct stat stat; 51fbcbf101SAneesh Kumar K.V FsDriverEntry *fse; 527cca27dfSM. Mohan Kumar V9fsPath path; 53f4f61d27SAneesh Kumar K.V 540f3657ecSAndreas Färber virtio_init(vdev, "virtio-9p", VIRTIO_ID_9P, 55e7303c43SKONRAD Frederic sizeof(struct virtio_9p_config) + MAX_TAG_LEN); 56e8111e50SKONRAD Frederic 57f4f61d27SAneesh Kumar K.V /* initialize pdu allocator */ 58f4f61d27SAneesh Kumar K.V QLIST_INIT(&s->free_list); 59bccacf6cSAneesh Kumar K.V QLIST_INIT(&s->active_list); 60f4f61d27SAneesh Kumar K.V for (i = 0; i < (MAX_REQ - 1); i++) { 61f4f61d27SAneesh Kumar K.V QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); 62f4f61d27SAneesh Kumar K.V } 63f4f61d27SAneesh Kumar K.V 64e8111e50SKONRAD Frederic s->vq = virtio_add_queue(vdev, MAX_REQ, handle_9p_output); 65f4f61d27SAneesh Kumar K.V 6627915efbSAndreas Färber v9fs_path_init(&path); 6727915efbSAndreas Färber 68e8111e50SKONRAD Frederic fse = get_fsdev_fsentry(s->fsconf.fsdev_id); 69f4f61d27SAneesh Kumar K.V 70f4f61d27SAneesh Kumar K.V if (!fse) { 71f4f61d27SAneesh Kumar K.V /* We don't have a fsdev identified by fsdev_id */ 7259be7522SAndreas Färber error_setg(errp, "Virtio-9p device couldn't find fsdev with the " 7359be7522SAndreas Färber "id = %s", 74e8111e50SKONRAD Frederic s->fsconf.fsdev_id ? s->fsconf.fsdev_id : "NULL"); 7592304bf3SM. Mohan Kumar goto out; 76f4f61d27SAneesh Kumar K.V } 77f4f61d27SAneesh Kumar K.V 78e8111e50SKONRAD Frederic if (!s->fsconf.tag) { 7999519f0aSAneesh Kumar K.V /* we haven't specified a mount_tag */ 8059be7522SAndreas Färber error_setg(errp, "fsdev with id %s needs mount_tag arguments", 81e8111e50SKONRAD Frederic s->fsconf.fsdev_id); 8292304bf3SM. Mohan Kumar goto out; 83f4f61d27SAneesh Kumar K.V } 84f4f61d27SAneesh Kumar K.V 85d3ab98e6SAneesh Kumar K.V s->ctx.export_flags = fse->export_flags; 867267c094SAnthony Liguori s->ctx.fs_root = g_strdup(fse->path); 87e06a765eSHarsh Prateek Bora s->ctx.exops.get_st_gen = NULL; 88e8111e50SKONRAD Frederic len = strlen(s->fsconf.tag); 89e9a0152bSAneesh Kumar K.V if (len > MAX_TAG_LEN - 1) { 9059be7522SAndreas Färber error_setg(errp, "mount tag '%s' (%d bytes) is longer than " 91e8111e50SKONRAD Frederic "maximum (%d bytes)", s->fsconf.tag, len, MAX_TAG_LEN - 1); 9292304bf3SM. Mohan Kumar goto out; 93f4f61d27SAneesh Kumar K.V } 94e9a0152bSAneesh Kumar K.V 9592304bf3SM. Mohan Kumar s->tag = g_strdup(s->fsconf.tag); 96f4f61d27SAneesh Kumar K.V s->ctx.uid = -1; 97f4f61d27SAneesh Kumar K.V 98f4f61d27SAneesh Kumar K.V s->ops = fse->ops; 99e9a0152bSAneesh Kumar K.V s->config_size = sizeof(struct virtio_9p_config) + len; 1009e5b2247SAneesh Kumar K.V s->fid_list = NULL; 10102cb7f3aSAneesh Kumar K.V qemu_co_rwlock_init(&s->rename_lock); 102f4f61d27SAneesh Kumar K.V 1030174fe73SAneesh Kumar K.V if (s->ops->init(&s->ctx) < 0) { 10459be7522SAndreas Färber error_setg(errp, "Virtio-9p Failed to initialize fs-driver with id:%s" 10559be7522SAndreas Färber " and export path:%s", s->fsconf.fsdev_id, s->ctx.fs_root); 10692304bf3SM. Mohan Kumar goto out; 1070174fe73SAneesh Kumar K.V } 10839c0564eSVenkateswararao Jujjuri (JV) if (v9fs_init_worker_threads() < 0) { 10959be7522SAndreas Färber error_setg(errp, "worker thread initialization failed"); 11092304bf3SM. Mohan Kumar goto out; 11139c0564eSVenkateswararao Jujjuri (JV) } 1127cca27dfSM. Mohan Kumar 1137cca27dfSM. Mohan Kumar /* 1147cca27dfSM. Mohan Kumar * Check details of export path, We need to use fs driver 1157cca27dfSM. Mohan Kumar * call back to do that. Since we are in the init path, we don't 1167cca27dfSM. Mohan Kumar * use co-routines here. 1177cca27dfSM. Mohan Kumar */ 1187cca27dfSM. Mohan Kumar if (s->ops->name_to_path(&s->ctx, NULL, "/", &path) < 0) { 11959be7522SAndreas Färber error_setg(errp, 1207cca27dfSM. Mohan Kumar "error in converting name to path %s", strerror(errno)); 12192304bf3SM. Mohan Kumar goto out; 1227cca27dfSM. Mohan Kumar } 1237cca27dfSM. Mohan Kumar if (s->ops->lstat(&s->ctx, &path, &stat)) { 12459be7522SAndreas Färber error_setg(errp, "share path %s does not exist", fse->path); 12592304bf3SM. Mohan Kumar goto out; 1267cca27dfSM. Mohan Kumar } else if (!S_ISDIR(stat.st_mode)) { 12759be7522SAndreas Färber error_setg(errp, "share path %s is not a directory", fse->path); 12892304bf3SM. Mohan Kumar goto out; 1297cca27dfSM. Mohan Kumar } 1307cca27dfSM. Mohan Kumar v9fs_path_free(&path); 1317cca27dfSM. Mohan Kumar 13259be7522SAndreas Färber return; 13392304bf3SM. Mohan Kumar out: 13492304bf3SM. Mohan Kumar g_free(s->ctx.fs_root); 13592304bf3SM. Mohan Kumar g_free(s->tag); 13692304bf3SM. Mohan Kumar virtio_cleanup(vdev); 13792304bf3SM. Mohan Kumar v9fs_path_free(&path); 138e7303c43SKONRAD Frederic } 139e7303c43SKONRAD Frederic 140e7303c43SKONRAD Frederic /* virtio-9p device */ 141e7303c43SKONRAD Frederic 142e7303c43SKONRAD Frederic static Property virtio_9p_properties[] = { 143e7303c43SKONRAD Frederic DEFINE_VIRTIO_9P_PROPERTIES(V9fsState, fsconf), 144e7303c43SKONRAD Frederic DEFINE_PROP_END_OF_LIST(), 145e7303c43SKONRAD Frederic }; 146e7303c43SKONRAD Frederic 147e7303c43SKONRAD Frederic static void virtio_9p_class_init(ObjectClass *klass, void *data) 148e7303c43SKONRAD Frederic { 149e7303c43SKONRAD Frederic DeviceClass *dc = DEVICE_CLASS(klass); 150e7303c43SKONRAD Frederic VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); 15159be7522SAndreas Färber 152e7303c43SKONRAD Frederic dc->props = virtio_9p_properties; 153125ee0edSMarcel Apfelbaum set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 15459be7522SAndreas Färber vdc->realize = virtio_9p_device_realize; 155e7303c43SKONRAD Frederic vdc->get_features = virtio_9p_get_features; 156e7303c43SKONRAD Frederic vdc->get_config = virtio_9p_get_config; 157e7303c43SKONRAD Frederic } 158e7303c43SKONRAD Frederic 159e7303c43SKONRAD Frederic static const TypeInfo virtio_device_info = { 160e7303c43SKONRAD Frederic .name = TYPE_VIRTIO_9P, 161e7303c43SKONRAD Frederic .parent = TYPE_VIRTIO_DEVICE, 162e7303c43SKONRAD Frederic .instance_size = sizeof(V9fsState), 163e7303c43SKONRAD Frederic .class_init = virtio_9p_class_init, 164e7303c43SKONRAD Frederic }; 165e7303c43SKONRAD Frederic 166e7303c43SKONRAD Frederic static void virtio_9p_register_types(void) 167e7303c43SKONRAD Frederic { 168e7303c43SKONRAD Frederic type_register_static(&virtio_device_info); 169e7303c43SKONRAD Frederic } 170e7303c43SKONRAD Frederic 171e7303c43SKONRAD Frederic type_init(virtio_9p_register_types) 172