| /* |
| * 9p |
| * |
| * Copyright IBM, Corp. 2010 |
| * |
| * Authors: |
| * Gautham R Shenoy <ego@in.ibm.com> |
| * |
| * This work is licensed under the terms of the GNU GPL, version 2. See |
| * the COPYING file in the top-level directory. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "qapi/error.h" |
| #include "qemu-fsdev.h" |
| #include "qemu/queue.h" |
| #include "qemu/config-file.h" |
| #include "qemu/error-report.h" |
| #include "qemu/option.h" |
| |
| /* |
| * A table to store the various file systems and their callback operations. |
| * ----------------- |
| * fstype | ops |
| * ----------------- |
| * local | local_ops |
| * . | |
| * . | |
| * . | |
| * . | |
| * ----------------- |
| * etc |
| */ |
| typedef struct FsDriverTable { |
| const char *name; |
| FileOperations *ops; |
| const char **opts; |
| } FsDriverTable; |
| |
| typedef struct FsDriverListEntry { |
| FsDriverEntry fse; |
| QTAILQ_ENTRY(FsDriverListEntry) next; |
| } FsDriverListEntry; |
| |
| static QTAILQ_HEAD(, FsDriverListEntry) fsdriver_entries = |
| QTAILQ_HEAD_INITIALIZER(fsdriver_entries); |
| |
| #define COMMON_FS_DRIVER_OPTIONS "id", "fsdriver", "readonly" |
| |
| static FsDriverTable FsDrivers[] = { |
| { |
| .name = "local", |
| .ops = &local_ops, |
| .opts = (const char * []) { |
| COMMON_FS_DRIVER_OPTIONS, |
| "security_model", |
| "path", |
| "writeout", |
| "fmode", |
| "dmode", |
| "multidevs", |
| "throttling.bps-total", |
| "throttling.bps-read", |
| "throttling.bps-write", |
| "throttling.iops-total", |
| "throttling.iops-read", |
| "throttling.iops-write", |
| "throttling.bps-total-max", |
| "throttling.bps-read-max", |
| "throttling.bps-write-max", |
| "throttling.iops-total-max", |
| "throttling.iops-read-max", |
| "throttling.iops-write-max", |
| "throttling.bps-total-max-length", |
| "throttling.bps-read-max-length", |
| "throttling.bps-write-max-length", |
| "throttling.iops-total-max-length", |
| "throttling.iops-read-max-length", |
| "throttling.iops-write-max-length", |
| "throttling.iops-size", |
| }, |
| }, |
| { |
| .name = "synth", |
| .ops = &synth_ops, |
| .opts = (const char * []) { |
| COMMON_FS_DRIVER_OPTIONS, |
| }, |
| }, |
| { |
| .name = "proxy", |
| .ops = &proxy_ops, |
| .opts = (const char * []) { |
| COMMON_FS_DRIVER_OPTIONS, |
| "socket", |
| "sock_fd", |
| "writeout", |
| }, |
| }, |
| }; |
| |
| static int validate_opt(void *opaque, const char *name, const char *value, |
| Error **errp) |
| { |
| FsDriverTable *drv = opaque; |
| const char **opt; |
| |
| for (opt = drv->opts; *opt; opt++) { |
| if (!strcmp(*opt, name)) { |
| return 0; |
| } |
| } |
| |
| error_setg(errp, "'%s' is invalid for fsdriver '%s'", name, drv->name); |
| return -1; |
| } |
| |
| int qemu_fsdev_add(QemuOpts *opts, Error **errp) |
| { |
| int i; |
| struct FsDriverListEntry *fsle; |
| const char *fsdev_id = qemu_opts_id(opts); |
| const char *fsdriver = qemu_opt_get(opts, "fsdriver"); |
| const char *writeout = qemu_opt_get(opts, "writeout"); |
| bool ro = qemu_opt_get_bool(opts, "readonly", 0); |
| |
| if (!fsdev_id) { |
| error_setg(errp, "fsdev: No id specified"); |
| return -1; |
| } |
| |
| if (fsdriver) { |
| for (i = 0; i < ARRAY_SIZE(FsDrivers); i++) { |
| if (strcmp(FsDrivers[i].name, fsdriver) == 0) { |
| break; |
| } |
| } |
| |
| if (i == ARRAY_SIZE(FsDrivers)) { |
| error_setg(errp, "fsdev: fsdriver %s not found", fsdriver); |
| return -1; |
| } |
| } else { |
| error_setg(errp, "fsdev: No fsdriver specified"); |
| return -1; |
| } |
| |
| if (qemu_opt_foreach(opts, validate_opt, &FsDrivers[i], errp)) { |
| return -1; |
| } |
| |
| fsle = g_malloc0(sizeof(*fsle)); |
| fsle->fse.fsdev_id = g_strdup(fsdev_id); |
| fsle->fse.ops = FsDrivers[i].ops; |
| if (writeout) { |
| if (!strcmp(writeout, "immediate")) { |
| fsle->fse.export_flags |= V9FS_IMMEDIATE_WRITEOUT; |
| } |
| } |
| if (ro) { |
| fsle->fse.export_flags |= V9FS_RDONLY; |
| } else { |
| fsle->fse.export_flags &= ~V9FS_RDONLY; |
| } |
| |
| if (fsle->fse.ops->parse_opts) { |
| if (fsle->fse.ops->parse_opts(opts, &fsle->fse, errp)) { |
| g_free(fsle->fse.fsdev_id); |
| g_free(fsle); |
| return -1; |
| } |
| } |
| |
| QTAILQ_INSERT_TAIL(&fsdriver_entries, fsle, next); |
| return 0; |
| } |
| |
| FsDriverEntry *get_fsdev_fsentry(char *id) |
| { |
| if (id) { |
| struct FsDriverListEntry *fsle; |
| |
| QTAILQ_FOREACH(fsle, &fsdriver_entries, next) { |
| if (strcmp(fsle->fse.fsdev_id, id) == 0) { |
| return &fsle->fse; |
| } |
| } |
| } |
| return NULL; |
| } |