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 "qemu/osdep.h" 14 #include "qemu-fsdev.h" 15 #include "qemu/queue.h" 16 #include "qemu-common.h" 17 #include "qemu/config-file.h" 18 #include "qemu/error-report.h" 19 20 static QTAILQ_HEAD(FsDriverEntry_head, FsDriverListEntry) fsdriver_entries = 21 QTAILQ_HEAD_INITIALIZER(fsdriver_entries); 22 23 static FsDriverTable FsDrivers[] = { 24 { .name = "local", .ops = &local_ops}, 25 #ifdef CONFIG_OPEN_BY_HANDLE 26 { .name = "handle", .ops = &handle_ops}, 27 #endif 28 { .name = "synth", .ops = &synth_ops}, 29 { .name = "proxy", .ops = &proxy_ops}, 30 }; 31 32 int qemu_fsdev_add(QemuOpts *opts) 33 { 34 int i; 35 struct FsDriverListEntry *fsle; 36 const char *fsdev_id = qemu_opts_id(opts); 37 const char *fsdriver = qemu_opt_get(opts, "fsdriver"); 38 const char *writeout = qemu_opt_get(opts, "writeout"); 39 bool ro = qemu_opt_get_bool(opts, "readonly", 0); 40 41 if (!fsdev_id) { 42 error_report("fsdev: No id specified"); 43 return -1; 44 } 45 46 if (fsdriver) { 47 for (i = 0; i < ARRAY_SIZE(FsDrivers); i++) { 48 if (strcmp(FsDrivers[i].name, fsdriver) == 0) { 49 break; 50 } 51 } 52 53 if (i == ARRAY_SIZE(FsDrivers)) { 54 error_report("fsdev: fsdriver %s not found", fsdriver); 55 return -1; 56 } 57 } else { 58 error_report("fsdev: No fsdriver specified"); 59 return -1; 60 } 61 62 fsle = g_malloc0(sizeof(*fsle)); 63 fsle->fse.fsdev_id = g_strdup(fsdev_id); 64 fsle->fse.ops = FsDrivers[i].ops; 65 if (writeout) { 66 if (!strcmp(writeout, "immediate")) { 67 fsle->fse.export_flags |= V9FS_IMMEDIATE_WRITEOUT; 68 } 69 } 70 if (ro) { 71 fsle->fse.export_flags |= V9FS_RDONLY; 72 } else { 73 fsle->fse.export_flags &= ~V9FS_RDONLY; 74 } 75 76 if (fsle->fse.ops->parse_opts) { 77 if (fsle->fse.ops->parse_opts(opts, &fsle->fse)) { 78 g_free(fsle->fse.fsdev_id); 79 g_free(fsle); 80 return -1; 81 } 82 } 83 84 QTAILQ_INSERT_TAIL(&fsdriver_entries, fsle, next); 85 return 0; 86 } 87 88 FsDriverEntry *get_fsdev_fsentry(char *id) 89 { 90 if (id) { 91 struct FsDriverListEntry *fsle; 92 93 QTAILQ_FOREACH(fsle, &fsdriver_entries, next) { 94 if (strcmp(fsle->fse.fsdev_id, id) == 0) { 95 return &fsle->fse; 96 } 97 } 98 } 99 return NULL; 100 } 101