svn commit: r331623 - in head/sys: compat/freebsd32 dev/md
Brooks Davis
brooks at FreeBSD.org
Tue Mar 27 16:07:55 UTC 2018
Author: brooks
Date: Tue Mar 27 16:07:54 2018
New Revision: 331623
URL: https://svnweb.freebsd.org/changeset/base/331623
Log:
Move 32-bit compat for md(4) ioctls into the md code.
This is more correct in that ioctl commands have no meaning until they
hit the handler associated with the file descriptor.
Add support for MDIOCRESIZE_32 which was missed when it was added.
Reviewed by: cem, kib, markj (various versions)
Obtained from: CheriBSD
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D14714
Modified:
head/sys/compat/freebsd32/freebsd32_ioctl.c
head/sys/compat/freebsd32/freebsd32_ioctl.h
head/sys/dev/md/md.c
Modified: head/sys/compat/freebsd32/freebsd32_ioctl.c
==============================================================================
--- head/sys/compat/freebsd32/freebsd32_ioctl.c Tue Mar 27 15:29:32 2018 (r331622)
+++ head/sys/compat/freebsd32/freebsd32_ioctl.c Tue Mar 27 16:07:54 2018 (r331623)
@@ -42,7 +42,6 @@ __FBSDID("$FreeBSD$");
#include <sys/file.h>
#include <sys/ioccom.h>
#include <sys/malloc.h>
-#include <sys/mdioctl.h>
#include <sys/memrange.h>
#include <sys/pciio.h>
#include <sys/proc.h>
@@ -58,90 +57,13 @@ __FBSDID("$FreeBSD$");
#include <compat/freebsd32/freebsd32_ioctl.h>
#include <compat/freebsd32/freebsd32_proto.h>
-CTASSERT((sizeof(struct md_ioctl32)) == 436);
CTASSERT(sizeof(struct ioc_read_toc_entry32) == 8);
CTASSERT(sizeof(struct mem_range_op32) == 12);
CTASSERT(sizeof(struct pci_conf_io32) == 36);
CTASSERT(sizeof(struct pci_match_conf32) == 44);
CTASSERT(sizeof(struct pci_conf32) == 44);
-
static int
-freebsd32_ioctl_md(struct thread *td, struct freebsd32_ioctl_args *uap,
- struct file *fp)
-{
- struct md_ioctl mdv;
- struct md_ioctl32 md32;
- u_long com = 0;
- int i, error;
-
- if (uap->com & IOC_IN) {
- if ((error = copyin(uap->data, &md32, sizeof(md32)))) {
- return (error);
- }
- CP(md32, mdv, md_version);
- CP(md32, mdv, md_unit);
- CP(md32, mdv, md_type);
- PTRIN_CP(md32, mdv, md_file);
- CP(md32, mdv, md_mediasize);
- CP(md32, mdv, md_sectorsize);
- CP(md32, mdv, md_options);
- CP(md32, mdv, md_base);
- CP(md32, mdv, md_fwheads);
- CP(md32, mdv, md_fwsectors);
- PTRIN_CP(md32, mdv, md_label);
- } else if (uap->com & IOC_OUT) {
- /*
- * Zero the buffer so the user always
- * gets back something deterministic.
- */
- bzero(&mdv, sizeof mdv);
- }
-
- switch (uap->com) {
- case MDIOCATTACH_32:
- com = MDIOCATTACH;
- break;
- case MDIOCDETACH_32:
- com = MDIOCDETACH;
- break;
- case MDIOCQUERY_32:
- com = MDIOCQUERY;
- break;
- case MDIOCLIST_32:
- com = MDIOCLIST;
- break;
- default:
- panic("%s: unknown MDIOC %#x", __func__, uap->com);
- }
- error = fo_ioctl(fp, com, (caddr_t)&mdv, td->td_ucred, td);
- if (error == 0 && (com & IOC_OUT)) {
- CP(mdv, md32, md_version);
- CP(mdv, md32, md_unit);
- CP(mdv, md32, md_type);
- PTROUT_CP(mdv, md32, md_file);
- CP(mdv, md32, md_mediasize);
- CP(mdv, md32, md_sectorsize);
- CP(mdv, md32, md_options);
- CP(mdv, md32, md_base);
- CP(mdv, md32, md_fwheads);
- CP(mdv, md32, md_fwsectors);
- PTROUT_CP(mdv, md32, md_label);
- if (com == MDIOCLIST) {
- /*
- * Use MDNPAD, and not MDNPAD32. Padding is
- * allocated and used by compat32 ABI.
- */
- for (i = 0; i < MDNPAD; i++)
- CP(mdv, md32, md_pad[i]);
- }
- error = copyout(&md32, uap->data, sizeof(md32));
- }
- return error;
-}
-
-
-static int
freebsd32_ioctl_ioc_read_toc(struct thread *td,
struct freebsd32_ioctl_args *uap, struct file *fp)
{
@@ -414,13 +336,6 @@ freebsd32_ioctl(struct thread *td, struct freebsd32_io
}
switch (uap->com) {
- case MDIOCATTACH_32: /* FALLTHROUGH */
- case MDIOCDETACH_32: /* FALLTHROUGH */
- case MDIOCQUERY_32: /* FALLTHROUGH */
- case MDIOCLIST_32:
- error = freebsd32_ioctl_md(td, uap, fp);
- break;
-
case CDIOREADTOCENTRYS_32:
error = freebsd32_ioctl_ioc_read_toc(td, uap, fp);
break;
Modified: head/sys/compat/freebsd32/freebsd32_ioctl.h
==============================================================================
--- head/sys/compat/freebsd32/freebsd32_ioctl.h Tue Mar 27 15:29:32 2018 (r331622)
+++ head/sys/compat/freebsd32/freebsd32_ioctl.h Tue Mar 27 16:07:54 2018 (r331623)
@@ -45,22 +45,6 @@ struct ioc_read_toc_entry32 {
uint32_t data; /* struct cd_toc_entry* */
};
-#define MDNPAD32 MDNPAD
-struct md_ioctl32 {
- unsigned md_version; /* Structure layout version */
- unsigned md_unit; /* unit number */
- enum md_types md_type; /* type of disk */
- caddr_t32 md_file; /* pathname of file to mount */
- off_t md_mediasize; /* size of disk in bytes */
- unsigned md_sectorsize; /* sectorsize */
- unsigned md_options; /* options */
- u_int64_t md_base; /* base address */
- int md_fwheads; /* firmware heads */
- int md_fwsectors; /* firmware sectors */
- caddr_t32 md_label; /* label of the device */
- int md_pad[MDNPAD32]; /* padding for future ideas */
-} __attribute__((__packed__));
-
struct fiodgname_arg32 {
int len;
caddr_t32 buf;
@@ -112,10 +96,6 @@ struct pci_conf_io32 {
};
#define CDIOREADTOCENTRYS_32 _IOWR('c', 5, struct ioc_read_toc_entry32)
-#define MDIOCATTACH_32 _IOC(IOC_INOUT, 'm', 0, sizeof(struct md_ioctl32))
-#define MDIOCDETACH_32 _IOC(IOC_INOUT, 'm', 1, sizeof(struct md_ioctl32))
-#define MDIOCQUERY_32 _IOC(IOC_INOUT, 'm', 2, sizeof(struct md_ioctl32))
-#define MDIOCLIST_32 _IOC(IOC_INOUT, 'm', 3, sizeof(struct md_ioctl32))
#define FIODGNAME_32 _IOW('f', 120, struct fiodgname_arg32)
#define MEMRANGE_GET32 _IOWR('m', 50, struct mem_range_op32)
#define MEMRANGE_SET32 _IOW('m', 51, struct mem_range_op32)
Modified: head/sys/dev/md/md.c
==============================================================================
--- head/sys/dev/md/md.c Tue Mar 27 15:29:32 2018 (r331622)
+++ head/sys/dev/md/md.c Tue Mar 27 16:07:54 2018 (r331623)
@@ -60,6 +60,7 @@
* From: src/sys/dev/vn/vn.c,v 1.122 2000/12/16 16:06:03
*/
+#include "opt_compat.h"
#include "opt_rootdevname.h"
#include "opt_geom.h"
#include "opt_md.h"
@@ -130,6 +131,30 @@ struct md_req {
size_t md_units_nitems; /* items in md_units array */
};
+#ifdef COMPAT_FREEBSD32
+struct md_ioctl32 {
+ unsigned md_version;
+ unsigned md_unit;
+ enum md_types md_type;
+ uint32_t md_file;
+ off_t md_mediasize;
+ unsigned md_sectorsize;
+ unsigned md_options;
+ uint64_t md_base;
+ int md_fwheads;
+ int md_fwsectors;
+ uint32_t md_label;
+ int md_pad[MDNPAD];
+} __attribute__((__packed__));
+CTASSERT((sizeof(struct md_ioctl32)) == 436);
+
+#define MDIOCATTACH_32 _IOC_NEWTYPE(MDIOCATTACH, struct md_ioctl32)
+#define MDIOCDETACH_32 _IOC_NEWTYPE(MDIOCDETACH, struct md_ioctl32)
+#define MDIOCQUERY_32 _IOC_NEWTYPE(MDIOCQUERY, struct md_ioctl32)
+#define MDIOCLIST_32 _IOC_NEWTYPE(MDIOCLIST, struct md_ioctl32)
+#define MDIOCRESIZE_32 _IOC_NEWTYPE(MDIOCRESIZE, struct md_ioctl32)
+#endif /* COMPAT_FREEBSD32 */
+
static MALLOC_DEFINE(M_MD, "md_disk", "Memory Disk");
static MALLOC_DEFINE(M_MDSECT, "md_sectors", "Memory Disk Sectors");
@@ -1396,8 +1421,10 @@ mdcreate_vnode(struct md_s *sc, struct md_req *mdr, st
error = copyinstr(fname, sc->file, sizeof(sc->file), NULL);
if (error != 0)
return (error);
- } else
+ } else if (mdr->md_file_seg == UIO_SYSSPACE)
strlcpy(sc->file, fname, sizeof(sc->file));
+ else
+ return (EDOOFUS);
/*
* If the user specified that this is a read only device, don't
@@ -1859,61 +1886,111 @@ kern_mdlist(struct md_req *mdr)
return (error);
}
+/* Copy members that are not userspace pointers. */
+#define MD_IOCTL2REQ(mdio, mdr) do { \
+ (mdr)->md_unit = (mdio)->md_unit; \
+ (mdr)->md_type = (mdio)->md_type; \
+ (mdr)->md_mediasize = (mdio)->md_mediasize; \
+ (mdr)->md_sectorsize = (mdio)->md_sectorsize; \
+ (mdr)->md_options = (mdio)->md_options; \
+ (mdr)->md_fwheads = (mdio)->md_fwheads; \
+ (mdr)->md_fwsectors = (mdio)->md_fwsectors; \
+ (mdr)->md_units = &(mdio)->md_pad[0]; \
+ (mdr)->md_units_nitems = nitems((mdio)->md_pad); \
+} while(0)
+
+/* Copy members that might have been updated */
+#define MD_REQ2IOCTL(mdr, mdio) do { \
+ (mdio)->md_unit = (mdr)->md_unit; \
+ (mdio)->md_type = (mdr)->md_type; \
+ (mdio)->md_mediasize = (mdr)->md_mediasize; \
+ (mdio)->md_sectorsize = (mdr)->md_sectorsize; \
+ (mdio)->md_options = (mdr)->md_options; \
+ (mdio)->md_fwheads = (mdr)->md_fwheads; \
+ (mdio)->md_fwsectors = (mdr)->md_fwsectors; \
+} while(0)
+
static int
mdctlioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flags,
struct thread *td)
{
struct md_req mdr;
- struct md_ioctl *mdio;
int error;
if (md_debug)
printf("mdctlioctl(%s %lx %p %x %p)\n",
devtoname(dev), cmd, addr, flags, td);
+ bzero(&mdr, sizeof(mdr));
switch (cmd) {
case MDIOCATTACH:
case MDIOCDETACH:
case MDIOCRESIZE:
case MDIOCQUERY:
- case MDIOCLIST:
- mdio = (struct md_ioctl *)addr;
+ case MDIOCLIST: {
+ struct md_ioctl *mdio = (struct md_ioctl *)addr;
if (mdio->md_version != MDIOVERSION)
return (EINVAL);
- mdr.md_unit = mdio->md_unit;
- mdr.md_type = mdio->md_type;
- mdr.md_mediasize = mdio->md_mediasize;
- mdr.md_sectorsize = mdio->md_sectorsize;
- mdr.md_options = mdio->md_options;
- mdr.md_fwheads = mdio->md_fwheads;
- mdr.md_fwsectors = mdio->md_fwsectors;
+ MD_IOCTL2REQ(mdio, &mdr);
mdr.md_file = mdio->md_file;
+ mdr.md_file_seg = UIO_USERSPACE;
/* If the file is adjacent to the md_ioctl it's in kernel. */
if ((void *)mdio->md_file == (void *)(mdio + 1))
mdr.md_file_seg = UIO_SYSSPACE;
- else
- mdr.md_file_seg = UIO_USERSPACE;
mdr.md_label = mdio->md_label;
- mdr.md_units = &mdio->md_pad[0];
- mdr.md_units_nitems = nitems(mdio->md_pad);
break;
}
+#ifdef COMPAT_FREEBSD32
+ case MDIOCATTACH_32:
+ case MDIOCDETACH_32:
+ case MDIOCRESIZE_32:
+ case MDIOCQUERY_32:
+ case MDIOCLIST_32: {
+ struct md_ioctl32 *mdio = (struct md_ioctl32 *)addr;
+ if (mdio->md_version != MDIOVERSION)
+ return (EINVAL);
+ MD_IOCTL2REQ(mdio, &mdr);
+ mdr.md_file = (void *)(uintptr_t)mdio->md_file;
+ mdr.md_file_seg = UIO_USERSPACE;
+ mdr.md_label = (void *)(uintptr_t)mdio->md_label;
+ break;
+ }
+#endif
+ default:
+ /* Fall through to handler switch. */
+ break;
+ }
error = 0;
switch (cmd) {
case MDIOCATTACH:
+#ifdef COMPAT_FREEBSD32
+ case MDIOCATTACH_32:
+#endif
error = kern_mdattach(td, &mdr);
break;
case MDIOCDETACH:
+#ifdef COMPAT_FREEBSD32
+ case MDIOCDETACH_32:
+#endif
error = kern_mddetach(td, &mdr);
break;
case MDIOCRESIZE:
+#ifdef COMPAT_FREEBSD32
+ case MDIOCRESIZE_32:
+#endif
error = kern_mdresize(&mdr);
break;
case MDIOCQUERY:
+#ifdef COMPAT_FREEBSD32
+ case MDIOCQUERY_32:
+#endif
error = kern_mdquery(&mdr);
break;
case MDIOCLIST:
+#ifdef COMPAT_FREEBSD32
+ case MDIOCLIST_32:
+#endif
error = kern_mdlist(&mdr);
break;
default:
@@ -1922,14 +1999,21 @@ mdctlioctl(struct cdev *dev, u_long cmd, caddr_t addr,
switch (cmd) {
case MDIOCATTACH:
- case MDIOCQUERY:
- mdio->md_unit = mdr.md_unit;
- mdio->md_type = mdr.md_type;
- mdio->md_mediasize = mdr.md_mediasize;
- mdio->md_sectorsize = mdr.md_sectorsize;
- mdio->md_options = mdr.md_options;
- mdio->md_fwheads = mdr.md_fwheads;
- mdio->md_fwsectors = mdr.md_fwsectors;
+ case MDIOCQUERY: {
+ struct md_ioctl *mdio = (struct md_ioctl *)addr;
+ MD_REQ2IOCTL(&mdr, mdio);
+ break;
+ }
+#ifdef COMPAT_FREEBSD32
+ case MDIOCATTACH_32:
+ case MDIOCQUERY_32: {
+ struct md_ioctl32 *mdio = (struct md_ioctl32 *)addr;
+ MD_REQ2IOCTL(&mdr, mdio);
+ break;
+ }
+#endif
+ default:
+ /* Other commands to not alter mdr. */
break;
}
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