/*
- * Virtio 9p
+ * 9p
*
* Copyright IBM, Corp. 2010
*
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
- *
*/
-#include <stdio.h>
-#include <string.h>
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
#include "qemu-fsdev.h"
-#include "qemu-queue.h"
-#include "osdep.h"
-#include "qemu-common.h"
-#include "qemu-config.h"
+#include "qemu/queue.h"
+#include "qemu/config-file.h"
+#include "qemu/error-report.h"
+#include "qemu/option.h"
-static QTAILQ_HEAD(FsDriverEntry_head, FsDriverListEntry) fsdriver_entries =
+/*
+ * 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},
- { .name = "handle", .ops = &handle_ops},
- { .name = "synth", .ops = &synth_ops},
+ {
+ .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",
+ NULL
+ },
+ },
+ {
+ .name = "synth",
+ .ops = &synth_ops,
+ .opts = (const char * []) {
+ COMMON_FS_DRIVER_OPTIONS,
+ NULL
+ },
+ },
+ {
+ .name = "proxy",
+ .ops = &proxy_ops,
+ .opts = (const char * []) {
+ COMMON_FS_DRIVER_OPTIONS,
+ "socket",
+ "sock_fd",
+ "writeout",
+ NULL
+ },
+ },
};
-int qemu_fsdev_add(QemuOpts *opts)
+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)
{
- struct FsDriverListEntry *fsle;
int i;
+ struct FsDriverListEntry *fsle;
const char *fsdev_id = qemu_opts_id(opts);
const char *fsdriver = qemu_opt_get(opts, "fsdriver");
- const char *path = qemu_opt_get(opts, "path");
- const char *sec_model = qemu_opt_get(opts, "security_model");
const char *writeout = qemu_opt_get(opts, "writeout");
bool ro = qemu_opt_get_bool(opts, "readonly", 0);
if (!fsdev_id) {
- fprintf(stderr, "fsdev: No id specified\n");
+ error_setg(errp, "fsdev: No id specified");
return -1;
}
}
if (i == ARRAY_SIZE(FsDrivers)) {
- fprintf(stderr, "fsdev: fsdriver %s not found\n", fsdriver);
+ error_setg(errp, "fsdev: fsdriver %s not found", fsdriver);
return -1;
}
} else {
- fprintf(stderr, "fsdev: No fsdriver specified\n");
- return -1;
- }
-
- if (!strcmp(fsdriver, "local") && !sec_model) {
- fprintf(stderr, "security model not specified, "
- "local fs needs security model\nvalid options are:"
- "\tsecurity_model=[passthrough|mapped|none]\n");
- return -1;
- }
-
- if (strcmp(fsdriver, "local") && sec_model) {
- fprintf(stderr, "only local fs driver needs security model\n");
+ error_setg(errp, "fsdev: No fsdriver specified");
return -1;
}
- if (!path) {
- fprintf(stderr, "fsdev: No path specified.\n");
+ if (qemu_opt_foreach(opts, validate_opt, &FsDrivers[i], errp)) {
return -1;
}
- fsle = g_malloc(sizeof(*fsle));
-
+ fsle = g_malloc0(sizeof(*fsle));
fsle->fse.fsdev_id = g_strdup(fsdev_id);
- fsle->fse.path = g_strdup(path);
fsle->fse.ops = FsDrivers[i].ops;
- fsle->fse.export_flags = 0;
if (writeout) {
if (!strcmp(writeout, "immediate")) {
fsle->fse.export_flags |= V9FS_IMMEDIATE_WRITEOUT;
fsle->fse.export_flags &= ~V9FS_RDONLY;
}
- if (strcmp(fsdriver, "local")) {
- goto done;
+ 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;
+ }
}
- if (!strcmp(sec_model, "passthrough")) {
- fsle->fse.export_flags |= V9FS_SM_PASSTHROUGH;
- } else if (!strcmp(sec_model, "mapped")) {
- fsle->fse.export_flags |= V9FS_SM_MAPPED;
- } else if (!strcmp(sec_model, "none")) {
- fsle->fse.export_flags |= V9FS_SM_NONE;
- } else {
- fprintf(stderr, "Invalid security model %s specified, valid options are"
- "\n\t [passthrough|mapped|none]\n", sec_model);
- return -1;
- }
-done:
QTAILQ_INSERT_TAIL(&fsdriver_entries, fsle, next);
return 0;
}
}
return NULL;
}
-
-static void fsdev_register_config(void)
-{
- qemu_add_opts(&qemu_fsdev_opts);
- qemu_add_opts(&qemu_virtfs_opts);
-}
-machine_init(fsdev_register_config);
-
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