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https://github.com/xen-project/xen.git
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Juergen Gross
6f58df9d7d
Add some functions allowing to retrieve and set Xenstore quota (either global or domain specific). Signed-off-by: Juergen Gross <jgross@suse.com> Acked-by: Nick Rosbrook <enr0n@ubuntu.com> # golang stuff Reviewed-by: Anthony PERARD <anthony.perard@vates.tech>
117 lines
2.9 KiB
C
117 lines
2.9 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-only */
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/* Xenstore quota handling functions. */
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#include "libxl_internal.h"
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static int get_quota(libxl_ctx *ctx, unsigned int domid,
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libxl_xs_quota_list *q_out,
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bool (func)(struct xs_handle *h, unsigned int domid,
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const char *quota, unsigned int *value))
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{
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const char **names;
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unsigned int num, i;
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bool ok;
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int rc;
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GC_INIT(ctx);
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libxl_xs_quota_list_init(q_out);
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names = xs_get_quota_names(ctx->xsh, &num);
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if (!names) {
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/* Xenstore quota support is optional! */
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if (errno != ENOSYS) {
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libxl_xs_quota_list_dispose(q_out);
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rc = ERROR_FAIL;
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} else {
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rc = 0;
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}
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goto out;
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}
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q_out->num_quota = num;
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q_out->quota = libxl__calloc(NOGC, num, sizeof(*q_out->quota));
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for (i = 0; i < num; i++) {
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q_out->quota[i].name = libxl__strdup(NOGC, names[i]);
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ok = func(ctx->xsh, domid, q_out->quota[i].name, &q_out->quota[i].val);
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if (!ok) {
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libxl_xs_quota_list_dispose(q_out);
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rc = ERROR_FAIL;
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goto out;
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}
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}
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rc = 0;
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out:
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free(names);
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GC_FREE;
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return rc;
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}
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static int set_quota(libxl_ctx *ctx, unsigned int domid, libxl_xs_quota_list *q,
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bool (func)(struct xs_handle *h, unsigned int domid,
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const char *quota, unsigned int value))
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{
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unsigned int i;
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bool ok;
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int rc;
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GC_INIT(ctx);
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for (i = 0; i < q->num_quota; i++) {
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ok = func(ctx->xsh, domid, q->quota[i].name, q->quota[i].val);
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if (!ok) {
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rc = ERROR_FAIL;
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goto out;
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}
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}
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rc = 0;
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out:
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GC_FREE;
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return rc;
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}
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static bool get_global_quota(struct xs_handle *h, unsigned int domid,
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const char *quota, unsigned int *value)
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{
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return xs_get_global_quota(h, quota, value);
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}
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int libxl_xs_quota_global_get(libxl_ctx *ctx, libxl_xs_quota_list *q_out)
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{
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return get_quota(ctx, 0, q_out, get_global_quota);
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}
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static bool set_global_quota(struct xs_handle *h, unsigned int domid,
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const char *quota, unsigned int value)
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{
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return xs_set_global_quota(h, quota, value);
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}
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int libxl_xs_quota_global_set(libxl_ctx *ctx, libxl_xs_quota_list *q)
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{
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return set_quota(ctx, 0, q, set_global_quota);;
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}
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int libxl_xs_quota_domain_get(libxl_ctx *ctx, uint32_t domid,
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libxl_xs_quota_list *q_out)
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{
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return get_quota(ctx, domid, q_out, xs_get_domain_quota);
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}
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int libxl_xs_quota_domain_set(libxl_ctx *ctx, uint32_t domid,
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libxl_xs_quota_list *q)
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{
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return set_quota(ctx, domid, q, xs_set_domain_quota);
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}
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/*
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* Local variables:
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* mode: C
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* c-basic-offset: 4
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* indent-tabs-mode: nil
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* End:
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*/
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