diff options
Diffstat (limited to 'sys/geom/geom_dev.c')
| -rw-r--r-- | sys/geom/geom_dev.c | 52 |
1 files changed, 51 insertions, 1 deletions
diff --git a/sys/geom/geom_dev.c b/sys/geom/geom_dev.c index f291b32..210f2ee 100644 --- a/sys/geom/geom_dev.c +++ b/sys/geom/geom_dev.c @@ -41,6 +41,7 @@ __FBSDID("$FreeBSD$"); #include <sys/malloc.h> #include <sys/kernel.h> #include <sys/conf.h> +#include <sys/ctype.h> #include <sys/bio.h> #include <sys/lock.h> #include <sys/mutex.h> @@ -52,6 +53,12 @@ __FBSDID("$FreeBSD$"); #include <sys/limits.h> #include <geom/geom.h> #include <geom/geom_int.h> +#include <machine/stdarg.h> + +/* + * Use the consumer private field to reference a physdev alias (if any). + */ +#define cp_alias_dev private static d_open_t g_dev_open; static d_close_t g_dev_close; @@ -72,12 +79,14 @@ static struct cdevsw g_dev_cdevsw = { static g_taste_t g_dev_taste; static g_orphan_t g_dev_orphan; +static g_attrchanged_t g_dev_attrchanged; static struct g_class g_dev_class = { .name = "DEV", .version = G_VERSION, .taste = g_dev_taste, .orphan = g_dev_orphan, + .attrchanged = g_dev_attrchanged }; void @@ -93,6 +102,40 @@ g_dev_print(void) printf("\n"); } +static void +g_dev_attrchanged(struct g_consumer *cp, const char *attr) +{ + + if (strcmp(attr, "GEOM::physpath") != 0) + return; + + if (g_access(cp, 1, 0, 0) == 0) { + char *physpath; + int error, physpath_len; + + physpath_len = MAXPATHLEN; + physpath = g_malloc(physpath_len, M_WAITOK|M_ZERO); + error = + g_io_getattr("GEOM::physpath", cp, &physpath_len, physpath); + g_access(cp, -1, 0, 0); + if (error == 0 && strlen(physpath) != 0) { + struct cdev *dev; + struct cdev *old_alias_dev; + struct cdev **alias_devp; + + dev = cp->geom->softc; + old_alias_dev = cp->cp_alias_dev; + alias_devp = (struct cdev **)&cp->cp_alias_dev; + make_dev_physpath_alias(MAKEDEV_WAITOK, alias_devp, + dev, old_alias_dev, physpath); + } else if (cp->cp_alias_dev) { + destroy_dev((struct cdev *)cp->cp_alias_dev); + cp->cp_alias_dev = NULL; + } + g_free(physpath); + } +} + struct g_provider * g_dev_getprovider(struct cdev *dev) { @@ -107,7 +150,6 @@ g_dev_getprovider(struct cdev *dev) return (cp->provider); } - static struct g_geom * g_dev_taste(struct g_class *mp, struct g_provider *pp, int insist __unused) { @@ -167,6 +209,9 @@ g_dev_taste(struct g_class *mp, struct g_provider *pp, int insist __unused) adev->si_drv1 = gp; adev->si_drv2 = cp; } + + g_dev_attrchanged(cp, "GEOM::physpath"); + return (gp); } @@ -365,6 +410,11 @@ g_dev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, struct thread case DIOCGSTRIPEOFFSET: *(off_t *)data = cp->provider->stripeoffset; break; + case DIOCGPHYSPATH: + error = g_io_getattr("GEOM::physpath", cp, &i, data); + if (error == 0 && *(char *)data == '\0') + error = ENOENT; + break; default: if (cp->provider->geom->ioctl != NULL) { error = cp->provider->geom->ioctl(cp->provider, cmd, data, fflag, td); |
