1 /* 2 * Virtio 9p 3 * 4 * Copyright IBM, Corp. 2010 5 * 6 * Authors: 7 * Gautham R Shenoy <ego@in.ibm.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2. See 10 * the COPYING file in the top-level directory. 11 * 12 */ 13 #include <stdio.h> 14 #include <string.h> 15 #include "qemu-fsdev.h" 16 #include "qemu-queue.h" 17 #include "osdep.h" 18 #include "qemu-common.h" 19 #include "qemu-config.h" 20 21 static QTAILQ_HEAD(FsDriverEntry_head, FsDriverListEntry) fsdriver_entries = 22 QTAILQ_HEAD_INITIALIZER(fsdriver_entries); 23 24 static FsDriverTable FsDrivers[] = { 25 { .name = "local", .ops = &local_ops}, 26 { .name = "handle", .ops = &handle_ops}, 27 }; 28 29 int qemu_fsdev_add(QemuOpts *opts) 30 { 31 struct FsDriverListEntry *fsle; 32 int i; 33 const char *fsdev_id = qemu_opts_id(opts); 34 const char *fsdriver = qemu_opt_get(opts, "fsdriver"); 35 const char *path = qemu_opt_get(opts, "path"); 36 const char *sec_model = qemu_opt_get(opts, "security_model"); 37 const char *writeout = qemu_opt_get(opts, "writeout"); 38 39 40 if (!fsdev_id) { 41 fprintf(stderr, "fsdev: No id specified\n"); 42 return -1; 43 } 44 45 if (fsdriver) { 46 for (i = 0; i < ARRAY_SIZE(FsDrivers); i++) { 47 if (strcmp(FsDrivers[i].name, fsdriver) == 0) { 48 break; 49 } 50 } 51 52 if (i == ARRAY_SIZE(FsDrivers)) { 53 fprintf(stderr, "fsdev: fsdriver %s not found\n", fsdriver); 54 return -1; 55 } 56 } else { 57 fprintf(stderr, "fsdev: No fsdriver specified\n"); 58 return -1; 59 } 60 61 if (!strcmp(fsdriver, "local") && !sec_model) { 62 fprintf(stderr, "security model not specified, " 63 "local fs needs security model\nvalid options are:" 64 "\tsecurity_model=[passthrough|mapped|none]\n"); 65 return -1; 66 } 67 68 if (strcmp(fsdriver, "local") && sec_model) { 69 fprintf(stderr, "only local fs driver needs security model\n"); 70 return -1; 71 } 72 73 if (!path) { 74 fprintf(stderr, "fsdev: No path specified.\n"); 75 return -1; 76 } 77 78 fsle = g_malloc(sizeof(*fsle)); 79 80 fsle->fse.fsdev_id = g_strdup(fsdev_id); 81 fsle->fse.path = g_strdup(path); 82 fsle->fse.ops = FsDrivers[i].ops; 83 fsle->fse.export_flags = 0; 84 if (writeout) { 85 if (!strcmp(writeout, "immediate")) { 86 fsle->fse.export_flags |= V9FS_IMMEDIATE_WRITEOUT; 87 } 88 } 89 90 if (strcmp(fsdriver, "local")) { 91 goto done; 92 } 93 94 if (!strcmp(sec_model, "passthrough")) { 95 fsle->fse.export_flags |= V9FS_SM_PASSTHROUGH; 96 } else if (!strcmp(sec_model, "mapped")) { 97 fsle->fse.export_flags |= V9FS_SM_MAPPED; 98 } else if (!strcmp(sec_model, "none")) { 99 fsle->fse.export_flags |= V9FS_SM_NONE; 100 } else { 101 fprintf(stderr, "Invalid security model %s specified, valid options are" 102 "\n\t [passthrough|mapped|none]\n", sec_model); 103 return -1; 104 } 105 done: 106 QTAILQ_INSERT_TAIL(&fsdriver_entries, fsle, next); 107 return 0; 108 } 109 110 FsDriverEntry *get_fsdev_fsentry(char *id) 111 { 112 if (id) { 113 struct FsDriverListEntry *fsle; 114 115 QTAILQ_FOREACH(fsle, &fsdriver_entries, next) { 116 if (strcmp(fsle->fse.fsdev_id, id) == 0) { 117 return &fsle->fse; 118 } 119 } 120 } 121 return NULL; 122 } 123 124 static void fsdev_register_config(void) 125 { 126 qemu_add_opts(&qemu_fsdev_opts); 127 qemu_add_opts(&qemu_virtfs_opts); 128 } 129 machine_init(fsdev_register_config); 130 131