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Olaf Hering
364c9ee007
Initialze discard_enable properly. This avoids a crash if a libxl_device_disk with an uninitialized discard_enable is passed to device_disk_add. Up to now only xl initialized discard_enable in its config parser. External users of libxl, such as libvirt, do not need to provide a default value. Signed-off-by: Olaf Hering <olaf@aepfle.de> Acked-by: Ian Campbell <ian.campbell@citrix.com>
104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
#include "libxl_osdeps.h" /* must come before any other headers */
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#include "libxlu_internal.h"
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#include "libxlu_disk_l.h"
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#include "libxlu_disk_i.h"
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#include "libxlu_cfg_i.h"
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void xlu__disk_err(DiskParseContext *dpc, const char *erroneous,
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const char *message) {
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fprintf(dpc->cfg->report,
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"%s: config parsing error in disk specification: %s"
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"%s%s%s"
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" in `%s'\n",
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dpc->cfg->config_source, message,
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erroneous?": near `":"", erroneous?erroneous:"", erroneous?"'":"",
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dpc->spec);
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if (!dpc->err) dpc->err= EINVAL;
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}
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static int dpc_prep(DiskParseContext *dpc, const char *spec) {
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int e;
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dpc->spec = spec;
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e = xlu__disk_yylex_init_extra(dpc, &dpc->scanner);
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if (e) goto fail;
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dpc->buf = xlu__disk_yy_scan_bytes(spec, strlen(spec), dpc->scanner);
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if (!dpc->buf) { e = ENOMEM; goto fail; }
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return 0;
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fail:
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fprintf(dpc->cfg->report, "cannot init disk scanner: %s\n",
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strerror(errno));
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return e;
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}
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static void dpc_dispose(DiskParseContext *dpc) {
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if (dpc->buf) {
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xlu__disk_yy_delete_buffer(dpc->buf, dpc->scanner);
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dpc->buf = 0;
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}
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if (dpc->scanner) {
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xlu__disk_yylex_destroy(dpc->scanner);
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dpc->scanner = 0;
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}
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}
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int xlu_disk_parse(XLU_Config *cfg,
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int nspecs, const char *const *specs,
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libxl_device_disk *disk) {
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DiskParseContext dpc;
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int i, e;
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memset(&dpc,0,sizeof(dpc));
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dpc.cfg = cfg;
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dpc.scanner = 0;
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dpc.disk = disk;
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disk->readwrite = 1;
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for (i=0; i<nspecs; i++) {
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e = dpc_prep(&dpc, specs[i]);
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if (e) { dpc.err = e; goto x_err; }
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xlu__disk_yylex(dpc.scanner);
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assert(!e);
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if (dpc.err) goto x_err;
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dpc_dispose(&dpc);
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}
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if (disk->format == LIBXL_DISK_FORMAT_UNKNOWN) {
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disk->format = LIBXL_DISK_FORMAT_RAW;
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}
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if (disk->is_cdrom) {
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disk->removable = 1;
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disk->readwrite = 0;
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if (!disk->pdev_path || !strcmp(disk->pdev_path, ""))
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disk->format = LIBXL_DISK_FORMAT_EMPTY;
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}
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if (!disk->vdev) {
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xlu__disk_err(&dpc,0, "no vdev specified");
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goto x_err;
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}
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if (!disk->pdev_path && !disk->removable) {
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xlu__disk_err(&dpc,0,"no target specified (and device not removable)");
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goto x_err;
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}
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x_err:
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dpc_dispose(&dpc);
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return dpc.err;
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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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