return libxl__xs_write(gc, XBT_NULL, path, "%s", cmd);
}
-struct libxl__physmap_info {
- uint64_t phys_offset;
- uint64_t start_addr;
- uint64_t size;
- uint32_t namelen;
- char name[];
-};
-
-/* Bump version every time when toolstack saved data changes.
- * Different types of data are arranged in the specified order.
- *
- * Version 1:
- * uint32_t version
- * QEMU physmap data:
- * uint32_t count
- * libxl__physmap_info * count
- */
-#define TOOLSTACK_SAVE_VERSION 1
-
-static inline char *restore_helper(libxl__gc *gc, uint32_t dm_domid,
- uint32_t domid,
- uint64_t phys_offset, char *node)
-{
- return libxl__device_model_xs_path(gc, dm_domid, domid,
- "/physmap/%"PRIx64"/%s",
- phys_offset, node);
-}
-
-static int libxl__toolstack_restore_qemu(libxl__gc *gc, uint32_t domid,
- const uint8_t *ptr, uint32_t size)
-{
- int ret, i;
- uint32_t count;
- char *xs_path;
- uint32_t dm_domid;
- struct libxl__physmap_info *pi;
-
- if (size < sizeof(count)) {
- LOG(ERROR, "wrong size");
- ret = -1;
- goto out;
- }
-
- memcpy(&count, ptr, sizeof(count));
- ptr += sizeof(count);
-
- if (size < sizeof(count) + count*(sizeof(struct libxl__physmap_info))) {
- LOG(ERROR, "wrong size");
- ret = -1;
- goto out;
- }
-
- dm_domid = libxl_get_stubdom_id(CTX, domid);
- for (i = 0; i < count; i++) {
- pi = (struct libxl__physmap_info*) ptr;
- ptr += sizeof(struct libxl__physmap_info) + pi->namelen;
-
- xs_path = restore_helper(gc, dm_domid, domid,
- pi->phys_offset, "start_addr");
- ret = libxl__xs_write(gc, 0, xs_path, "%"PRIx64, pi->start_addr);
- if (ret) goto out;
-
- xs_path = restore_helper(gc, dm_domid, domid, pi->phys_offset, "size");
- ret = libxl__xs_write(gc, 0, xs_path, "%"PRIx64, pi->size);
- if (ret) goto out;
-
- if (pi->namelen > 0) {
- xs_path = restore_helper(gc, dm_domid, domid,
- pi->phys_offset, "name");
- ret = libxl__xs_write(gc, 0, xs_path, "%s", pi->name);
- if (ret) goto out;
- }
- }
-
- ret = 0;
-out:
- return ret;
-
-}
-
-static int libxl__toolstack_restore_v1(libxl__gc *gc, uint32_t domid,
- const uint8_t *ptr, uint32_t size)
-{
- return libxl__toolstack_restore_qemu(gc, domid, ptr, size);
-}
-
-int libxl__toolstack_restore(uint32_t domid, const uint8_t *ptr,
- uint32_t size, void *user)
-{
- libxl__save_helper_state *shs = user;
- libxl__domain_create_state *dcs = shs->caller_state;
- STATE_AO_GC(dcs->ao);
- int ret;
- uint32_t version = 0, bufsize;
-
- LOG(DEBUG,"domain=%"PRIu32" toolstack data size=%"PRIu32, domid, size);
-
- if (size < sizeof(version)) {
- LOG(ERROR, "wrong size");
- ret = -1;
- goto out;
- }
-
- memcpy(&version, ptr, sizeof(version));
- ptr += sizeof(version);
- bufsize = size - sizeof(version);
-
- switch (version) {
- case 1:
- ret = libxl__toolstack_restore_v1(gc, domid, ptr, bufsize);
- break;
- default:
- LOG(ERROR, "wrong version");
- ret = -1;
- }
-
-out:
- return ret;
-}
-
/*
* Inspect the buffer between start and end, and return a pointer to the
* character following the NUL terminator of start, or NULL if start is not
/*----- callbacks, called by xc_domain_save -----*/
-static inline char *physmap_path(libxl__gc *gc, uint32_t dm_domid,
- uint32_t domid,
- char *phys_offset, char *node)
-{
- return libxl__device_model_xs_path(gc, dm_domid, domid,
- "/physmap/%s/%s",
- phys_offset, node);
-}
-
-int libxl__toolstack_save(uint32_t domid, uint8_t **buf,
- uint32_t *len, void *dss_void)
-{
- libxl__domain_suspend_state *dss = dss_void;
- int ret;
- STATE_AO_GC(dss->ao);
- int i = 0;
- uint32_t version = TOOLSTACK_SAVE_VERSION;
- uint8_t *ptr = NULL;
-
- ret = -1;
-
- /* Version number */
- *len = sizeof(version);
- *buf = calloc(1, *len);
- if (*buf == NULL) goto out;
- ptr = *buf;
- memcpy(ptr, &version, sizeof(version));
-
- /* QEMU physmap data */
- {
- char **entries = NULL, *xs_path;
- struct libxl__physmap_info *pi;
- uint32_t dm_domid;
- char *start_addr = NULL, *size = NULL, *phys_offset = NULL;
- char *name = NULL;
- unsigned int num = 0;
- uint32_t count = 0, namelen = 0;
-
- dm_domid = libxl_get_stubdom_id(CTX, domid);
-
- xs_path = libxl__device_model_xs_path(gc, dm_domid, domid,
- "/physmap");
- entries = libxl__xs_directory(gc, 0, xs_path, &num);
- count = num;
-
- *len += sizeof(count);
- *buf = realloc(*buf, *len);
- if (*buf == NULL) goto out;
- ptr = *buf + sizeof(version);
- memcpy(ptr, &count, sizeof(count));
- ptr += sizeof(count);
-
- for (i = 0; i < count; i++) {
- unsigned long offset;
- phys_offset = entries[i];
- if (phys_offset == NULL) {
- LOG(ERROR, "phys_offset %d is NULL", i);
- goto out;
- }
-
- xs_path = physmap_path(gc, dm_domid, domid, phys_offset,
- "start_addr");
- start_addr = libxl__xs_read(gc, 0, xs_path);
- if (start_addr == NULL) {
- LOG(ERROR, "%s is NULL", xs_path);
- goto out;
- }
-
- xs_path = physmap_path(gc, dm_domid, domid, phys_offset, "size");
- size = libxl__xs_read(gc, 0, xs_path);
- if (size == NULL) {
- LOG(ERROR, "%s is NULL", xs_path);
- goto out;
- }
-
- xs_path = physmap_path(gc, dm_domid, domid, phys_offset, "name");
- name = libxl__xs_read(gc, 0, xs_path);
- if (name == NULL)
- namelen = 0;
- else
- namelen = strlen(name) + 1;
- *len += namelen + sizeof(struct libxl__physmap_info);
- offset = ptr - (*buf);
- *buf = realloc(*buf, *len);
- if (*buf == NULL) goto out;
- ptr = (*buf) + offset;
- pi = (struct libxl__physmap_info *) ptr;
- pi->phys_offset = strtoll(phys_offset, NULL, 16);
- pi->start_addr = strtoll(start_addr, NULL, 16);
- pi->size = strtoll(size, NULL, 16);
- pi->namelen = namelen;
- memcpy(pi->name, name, namelen);
- ptr += sizeof(struct libxl__physmap_info) + namelen;
- }
- }
-
- LOG(DEBUG,"domain=%"PRIu32" toolstack data size=%"PRIu32, domid, *len);
-
- ret = 0;
-out:
- return ret;
-}
-
/*
* Expand the buffer 'buf' of length 'len', to append 'str' including its NUL
* terminator.
projects / people / liuw / libxenctrl-split / xen.git / commitdiff