174db920cSGautham R Shenoy /* 274db920cSGautham R Shenoy * Virtio 9p 374db920cSGautham R Shenoy * 474db920cSGautham R Shenoy * Copyright IBM, Corp. 2010 574db920cSGautham R Shenoy * 674db920cSGautham R Shenoy * Authors: 774db920cSGautham R Shenoy * Gautham R Shenoy <ego@in.ibm.com> 874db920cSGautham R Shenoy * 974db920cSGautham R Shenoy * This work is licensed under the terms of the GNU GPL, version 2. See 1074db920cSGautham R Shenoy * the COPYING file in the top-level directory. 1174db920cSGautham R Shenoy * 1274db920cSGautham R Shenoy */ 1374db920cSGautham R Shenoy #include <stdio.h> 1474db920cSGautham R Shenoy #include <string.h> 1574db920cSGautham R Shenoy #include "qemu-fsdev.h" 1674db920cSGautham R Shenoy #include "qemu-queue.h" 1774db920cSGautham R Shenoy #include "osdep.h" 1874db920cSGautham R Shenoy #include "qemu-common.h" 19526c5237SGerd Hoffmann #include "qemu-config.h" 2074db920cSGautham R Shenoy 21fbcbf101SAneesh Kumar K.V static QTAILQ_HEAD(FsDriverEntry_head, FsDriverListEntry) fsdriver_entries = 22fbcbf101SAneesh Kumar K.V QTAILQ_HEAD_INITIALIZER(fsdriver_entries); 2374db920cSGautham R Shenoy 24fbcbf101SAneesh Kumar K.V static FsDriverTable FsDrivers[] = { 259f107513SAnthony Liguori { .name = "local", .ops = &local_ops}, 265f542225SAneesh Kumar K.V { .name = "handle", .ops = &handle_ops}, 2774db920cSGautham R Shenoy }; 2874db920cSGautham R Shenoy 2974db920cSGautham R Shenoy int qemu_fsdev_add(QemuOpts *opts) 3074db920cSGautham R Shenoy { 31fbcbf101SAneesh Kumar K.V struct FsDriverListEntry *fsle; 3274db920cSGautham R Shenoy int i; 339f506893SHarsh Prateek Bora const char *fsdev_id = qemu_opts_id(opts); 34fbcbf101SAneesh Kumar K.V const char *fsdriver = qemu_opt_get(opts, "fsdriver"); 359f506893SHarsh Prateek Bora const char *path = qemu_opt_get(opts, "path"); 369f506893SHarsh Prateek Bora const char *sec_model = qemu_opt_get(opts, "security_model"); 37d3ab98e6SAneesh Kumar K.V const char *writeout = qemu_opt_get(opts, "writeout"); 38*2c74c2cbSM. Mohan Kumar bool ro = qemu_opt_get_bool(opts, "readonly", 0); 3974db920cSGautham R Shenoy 409f506893SHarsh Prateek Bora if (!fsdev_id) { 4174db920cSGautham R Shenoy fprintf(stderr, "fsdev: No id specified\n"); 4274db920cSGautham R Shenoy return -1; 4374db920cSGautham R Shenoy } 4474db920cSGautham R Shenoy 45fbcbf101SAneesh Kumar K.V if (fsdriver) { 46fbcbf101SAneesh Kumar K.V for (i = 0; i < ARRAY_SIZE(FsDrivers); i++) { 47fbcbf101SAneesh Kumar K.V if (strcmp(FsDrivers[i].name, fsdriver) == 0) { 4874db920cSGautham R Shenoy break; 4974db920cSGautham R Shenoy } 5074db920cSGautham R Shenoy } 5174db920cSGautham R Shenoy 52fbcbf101SAneesh Kumar K.V if (i == ARRAY_SIZE(FsDrivers)) { 53fbcbf101SAneesh Kumar K.V fprintf(stderr, "fsdev: fsdriver %s not found\n", fsdriver); 549f506893SHarsh Prateek Bora return -1; 559f506893SHarsh Prateek Bora } 569f506893SHarsh Prateek Bora } else { 57fbcbf101SAneesh Kumar K.V fprintf(stderr, "fsdev: No fsdriver specified\n"); 5874db920cSGautham R Shenoy return -1; 5974db920cSGautham R Shenoy } 6074db920cSGautham R Shenoy 61d9b36a6eSM. Mohan Kumar if (!strcmp(fsdriver, "local") && !sec_model) { 62d9b36a6eSM. Mohan Kumar fprintf(stderr, "security model not specified, " 63d9b36a6eSM. Mohan Kumar "local fs needs security model\nvalid options are:" 64d9b36a6eSM. Mohan Kumar "\tsecurity_model=[passthrough|mapped|none]\n"); 65d9b36a6eSM. Mohan Kumar return -1; 66d9b36a6eSM. Mohan Kumar } 67d9b36a6eSM. Mohan Kumar 68d9b36a6eSM. Mohan Kumar if (strcmp(fsdriver, "local") && sec_model) { 69d9b36a6eSM. Mohan Kumar fprintf(stderr, "only local fs driver needs security model\n"); 709ce56db6SVenkateswararao Jujjuri (JV) return -1; 719ce56db6SVenkateswararao Jujjuri (JV) } 729ce56db6SVenkateswararao Jujjuri (JV) 739f506893SHarsh Prateek Bora if (!path) { 749f506893SHarsh Prateek Bora fprintf(stderr, "fsdev: No path specified.\n"); 759f506893SHarsh Prateek Bora return -1; 769f506893SHarsh Prateek Bora } 779f506893SHarsh Prateek Bora 787267c094SAnthony Liguori fsle = g_malloc(sizeof(*fsle)); 7974db920cSGautham R Shenoy 807267c094SAnthony Liguori fsle->fse.fsdev_id = g_strdup(fsdev_id); 817267c094SAnthony Liguori fsle->fse.path = g_strdup(path); 82fbcbf101SAneesh Kumar K.V fsle->fse.ops = FsDrivers[i].ops; 83d3ab98e6SAneesh Kumar K.V fsle->fse.export_flags = 0; 84d3ab98e6SAneesh Kumar K.V if (writeout) { 85d3ab98e6SAneesh Kumar K.V if (!strcmp(writeout, "immediate")) { 86b97400caSAneesh Kumar K.V fsle->fse.export_flags |= V9FS_IMMEDIATE_WRITEOUT; 87d3ab98e6SAneesh Kumar K.V } 88d3ab98e6SAneesh Kumar K.V } 89*2c74c2cbSM. Mohan Kumar if (ro) { 90*2c74c2cbSM. Mohan Kumar fsle->fse.export_flags |= V9FS_RDONLY; 91*2c74c2cbSM. Mohan Kumar } else { 92*2c74c2cbSM. Mohan Kumar fsle->fse.export_flags &= ~V9FS_RDONLY; 93*2c74c2cbSM. Mohan Kumar } 94b97400caSAneesh Kumar K.V 95d9b36a6eSM. Mohan Kumar if (strcmp(fsdriver, "local")) { 96d9b36a6eSM. Mohan Kumar goto done; 97d9b36a6eSM. Mohan Kumar } 98d9b36a6eSM. Mohan Kumar 99b97400caSAneesh Kumar K.V if (!strcmp(sec_model, "passthrough")) { 100b97400caSAneesh Kumar K.V fsle->fse.export_flags |= V9FS_SM_PASSTHROUGH; 101b97400caSAneesh Kumar K.V } else if (!strcmp(sec_model, "mapped")) { 102b97400caSAneesh Kumar K.V fsle->fse.export_flags |= V9FS_SM_MAPPED; 103b97400caSAneesh Kumar K.V } else if (!strcmp(sec_model, "none")) { 104b97400caSAneesh Kumar K.V fsle->fse.export_flags |= V9FS_SM_NONE; 105b97400caSAneesh Kumar K.V } else { 106d9b36a6eSM. Mohan Kumar fprintf(stderr, "Invalid security model %s specified, valid options are" 107d9b36a6eSM. Mohan Kumar "\n\t [passthrough|mapped|none]\n", sec_model); 108d9b36a6eSM. Mohan Kumar return -1; 109b97400caSAneesh Kumar K.V } 110d9b36a6eSM. Mohan Kumar done: 111fbcbf101SAneesh Kumar K.V QTAILQ_INSERT_TAIL(&fsdriver_entries, fsle, next); 11274db920cSGautham R Shenoy return 0; 11374db920cSGautham R Shenoy } 11474db920cSGautham R Shenoy 115fbcbf101SAneesh Kumar K.V FsDriverEntry *get_fsdev_fsentry(char *id) 11674db920cSGautham R Shenoy { 1179f506893SHarsh Prateek Bora if (id) { 118fbcbf101SAneesh Kumar K.V struct FsDriverListEntry *fsle; 11974db920cSGautham R Shenoy 120fbcbf101SAneesh Kumar K.V QTAILQ_FOREACH(fsle, &fsdriver_entries, next) { 12174db920cSGautham R Shenoy if (strcmp(fsle->fse.fsdev_id, id) == 0) { 12274db920cSGautham R Shenoy return &fsle->fse; 12374db920cSGautham R Shenoy } 12474db920cSGautham R Shenoy } 1259f506893SHarsh Prateek Bora } 12674db920cSGautham R Shenoy return NULL; 12774db920cSGautham R Shenoy } 128526c5237SGerd Hoffmann 129526c5237SGerd Hoffmann static void fsdev_register_config(void) 130526c5237SGerd Hoffmann { 131526c5237SGerd Hoffmann qemu_add_opts(&qemu_fsdev_opts); 132526c5237SGerd Hoffmann qemu_add_opts(&qemu_virtfs_opts); 133526c5237SGerd Hoffmann } 134526c5237SGerd Hoffmann machine_init(fsdev_register_config); 135526c5237SGerd Hoffmann 136