Page MenuHomeFreeBSD
Differential D37335 Diff 112851 stand/userboot/userboot/devicename.c

Changeset View

Standalone View

View Options

stand/userboot/userboot/devicename.c

Show All 32 Lines
#include "bootstrap.h" #include "bootstrap.h"
#include "disk.h" #include "disk.h"
#include "libuserboot.h" #include "libuserboot.h"
#if defined(USERBOOT_ZFS_SUPPORT) #if defined(USERBOOT_ZFS_SUPPORT)
#include "libzfs.h" #include "libzfs.h"
#endif #endif
static int userboot_parsedev(struct disk_devdesc **dev, const char *devspec, static int userboot_parsedev(struct devdesc **dev, const char *devspec,
const char **path); const char **path);
/* /*
* Point (dev) at an allocated device specifier for the device matching the * Point (dev) at an allocated device specifier for the device matching the
* path in (devspec). If it contains an explicit device specification, * path in (devspec). If it contains an explicit device specification,
* use that. If not, use the default device. * use that. If not, use the default device.
*/ */
int int
userboot_getdev(void **vdev, const char *devspec, const char **path) userboot_getdev(void **vdev, const char *devspec, const char **path)
{ {
struct disk_devdesc **dev = (struct disk_devdesc **)vdev; struct devdesc **dev = (struct devdesc **)vdev;
int rv; int rv;
/* /*
* If it looks like this is just a path and no * If it looks like this is just a path and no
* device, go with the current device. * device, go with the current device.
*/ */
if ((devspec == NULL) || if ((devspec == NULL) ||
(devspec[0] == '/') || (devspec[0] == '/') ||
Show All 21 Lines
* is parsed according to the rules applied to the device type. * is parsed according to the rules applied to the device type.
* *
* For disk-type devices, the syntax is: * For disk-type devices, the syntax is:
* *
* disk<unit>[s<slice>][<partition>]: * disk<unit>[s<slice>][<partition>]:
* *
*/ */
static int static int
userboot_parsedev(struct disk_devdesc **dev, const char *devspec, userboot_parsedev(struct devdesc **dev, const char *devspec,
const char **path) const char **path)
{ {
struct disk_devdesc *idev; struct devdesc *idev;
struct devsw *dv; struct devsw *dv;
int i, unit, err; int i, unit, err;
const char *cp; const char *cp;
const char *np; const char *np;
/* minimum length check */ /* minimum length check */
if (strlen(devspec) < 2) if (strlen(devspec) < 2)
return (EINVAL); return (EINVAL);
Show All 12 Linesuserboot_parsedev(struct devdesc **dev, const char *devspec,
err = 0; err = 0;
np = (devspec + strlen(dv->dv_name)); np = (devspec + strlen(dv->dv_name));
switch (dv->dv_type) { switch (dv->dv_type) {
case DEVT_NONE: /* XXX what to do here? Do we care? */ case DEVT_NONE: /* XXX what to do here? Do we care? */
break; break;
case DEVT_DISK: case DEVT_DISK:
err = disk_parsedev(idev, np, path); free(idev);
err = disk_parsedev(&idev, np, path);
if (err != 0) if (err != 0)
goto fail; goto fail;
break; break;
case DEVT_CD: case DEVT_CD:
case DEVT_NET: case DEVT_NET:
unit = 0; unit = 0;
if (*np && (*np != ':')) { if (*np && (*np != ':')) {
/* get unit number if present */ /* get unit number if present */
unit = strtol(np, (char **)&cp, 0); unit = strtol(np, (char **)&cp, 0);
if (cp == np) { if (cp == np) {
err = EUNIT; err = EUNIT;
goto fail; goto fail;
} }
} else { } else {
cp = np; cp = np;
} }
if (*cp && (*cp != ':')) { if (*cp && (*cp != ':')) {
err = EINVAL; err = EINVAL;
goto fail; goto fail;
} }
idev->dd.d_unit = unit; idev->d_unit = unit;
if (path != NULL) if (path != NULL)
*path = (*cp == 0) ? cp : cp + 1; *path = (*cp == 0) ? cp : cp + 1;
break; break;
case DEVT_ZFS: case DEVT_ZFS:
#if defined(USERBOOT_ZFS_SUPPORT) #if defined(USERBOOT_ZFS_SUPPORT)
/* XXX assumes sizeof disk_devdesc >= sizeof zfs_devdesc */
err = zfs_parsedev((struct zfs_devdesc *)idev, np, path); err = zfs_parsedev((struct zfs_devdesc *)idev, np, path);
if (err != 0) if (err != 0)
goto fail; goto fail;
break; break;
#else #else
/* FALLTHROUGH */ /* FALLTHROUGH */
#endif #endif
default: default:
err = EINVAL; err = EINVAL;
goto fail; goto fail;
} }
idev->dd.d_dev = dv; idev->d_dev = dv;
if (dev == NULL) { if (dev == NULL) {
free(idev); free(idev);
} else { } else {
*dev = idev; *dev = idev;
} }
return (0); return (0);
fail: fail:
free(idev); free(idev);
return (err); return (err);
} }
/* /*
* Set currdev to suit the value being supplied in (value) * Set currdev to suit the value being supplied in (value)
*/ */
int int
userboot_setcurrdev(struct env_var *ev, int flags, const void *value) userboot_setcurrdev(struct env_var *ev, int flags, const void *value)
{ {
struct disk_devdesc *ncurr; struct devdesc *ncurr;
int rv; int rv;
if ((rv = userboot_parsedev(&ncurr, value, NULL)) != 0) if ((rv = userboot_parsedev(&ncurr, value, NULL)) != 0)
return (rv); return (rv);
free(ncurr); free(ncurr);
return (mount_currdev(ev, flags, value)); return (mount_currdev(ev, flags, value));
} }