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Add a request structure and make the implementation use it.

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This allows compatibility translation to take place on the stack
(md_ioctl is too big) and is more suitable as a public interface within
the kernel than the kern_ioctl interface.

Except for the initialization of the md_req from the md_ioctl
(including detection of kernel md_file pointers) and the updating
of the md_ioctl prior to return, this is a mechanical replacment
of md_ioctl and mdio with md_req and mdr.

Reviewed by:	markj, cem, kib (assorted versions)
Obtained from:	CheriBSD
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D14704
This commit is contained in:
Brooks Davis 2018-03-15 21:42:49 +00:00
parent 6f2e9930be
commit 064c9c3d42
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=331030
1 changed files with 157 additions and 115 deletions
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272
sys/dev/md/md.c
View File

@ -114,6 +114,21 @@
#define MD_NSECT (10000 * 2) #define MD_NSECT (10000 * 2)
#endif #endif
struct md_req {
unsigned md_unit; /* unit number */
enum md_types md_type; /* type of disk */
off_t md_mediasize; /* size of disk in bytes */
unsigned md_sectorsize; /* sectorsize */
unsigned md_options; /* options */
int md_fwheads; /* firmware heads */
int md_fwsectors; /* firmware sectors */
char *md_file; /* pathname of file to mount */
enum uio_seg md_file_seg; /* location of md_file */
char *md_label; /* label of the device (userspace) */
int *md_units; /* pointer to units array (kernel) */
size_t md_units_nitems; /* items in md_units array */
};
static MALLOC_DEFINE(M_MD, "md_disk", "Memory Disk"); static MALLOC_DEFINE(M_MD, "md_disk", "Memory Disk");
static MALLOC_DEFINE(M_MDSECT, "md_sectors", "Memory Disk Sectors"); static MALLOC_DEFINE(M_MDSECT, "md_sectors", "Memory Disk Sectors");
@ -1285,29 +1300,29 @@ mdinit(struct md_s *sc)
} }
static int static int
mdcreate_malloc(struct md_s *sc, struct md_ioctl *mdio) mdcreate_malloc(struct md_s *sc, struct md_req *mdr)
{ {
uintptr_t sp; uintptr_t sp;
int error; int error;
off_t u; off_t u;
error = 0; error = 0;
if (mdio->md_options & ~(MD_AUTOUNIT | MD_COMPRESS | MD_RESERVE)) if (mdr->md_options & ~(MD_AUTOUNIT | MD_COMPRESS | MD_RESERVE))
return (EINVAL); return (EINVAL);
if (mdio->md_sectorsize != 0 && !powerof2(mdio->md_sectorsize)) if (mdr->md_sectorsize != 0 && !powerof2(mdr->md_sectorsize))
return (EINVAL); return (EINVAL);
/* Compression doesn't make sense if we have reserved space */ /* Compression doesn't make sense if we have reserved space */
if (mdio->md_options & MD_RESERVE) if (mdr->md_options & MD_RESERVE)
mdio->md_options &= ~MD_COMPRESS; mdr->md_options &= ~MD_COMPRESS;
if (mdio->md_fwsectors != 0) if (mdr->md_fwsectors != 0)
sc->fwsectors = mdio->md_fwsectors; sc->fwsectors = mdr->md_fwsectors;
if (mdio->md_fwheads != 0) if (mdr->md_fwheads != 0)
sc->fwheads = mdio->md_fwheads; sc->fwheads = mdr->md_fwheads;
sc->flags = mdio->md_options & (MD_COMPRESS | MD_FORCE); sc->flags = mdr->md_options & (MD_COMPRESS | MD_FORCE);
sc->indir = dimension(sc->mediasize / sc->sectorsize); sc->indir = dimension(sc->mediasize / sc->sectorsize);
sc->uma = uma_zcreate(sc->name, sc->sectorsize, NULL, NULL, NULL, NULL, sc->uma = uma_zcreate(sc->name, sc->sectorsize, NULL, NULL, NULL, NULL,
0x1ff, 0); 0x1ff, 0);
if (mdio->md_options & MD_RESERVE) { if (mdr->md_options & MD_RESERVE) {
off_t nsectors; off_t nsectors;
nsectors = sc->mediasize / sc->sectorsize; nsectors = sc->mediasize / sc->sectorsize;
@ -1368,19 +1383,15 @@ mdsetcred(struct md_s *sc, struct ucred *cred)
} }
static int static int
mdcreate_vnode(struct md_s *sc, struct md_ioctl *mdio, struct thread *td) mdcreate_vnode(struct md_s *sc, struct md_req *mdr, struct thread *td)
{ {
struct vattr vattr; struct vattr vattr;
struct nameidata nd; struct nameidata nd;
char *fname; char *fname;
int error, flags; int error, flags;
/* fname = mdr->md_file;
* Kernel-originated requests must have the filename appended if (mdr->md_file_seg == UIO_USERSPACE) {
* to the mdio structure to protect against malicious software.
*/
fname = mdio->md_file;
if ((void *)fname != (void *)(mdio + 1)) {
error = copyinstr(fname, sc->file, sizeof(sc->file), NULL); error = copyinstr(fname, sc->file, sizeof(sc->file), NULL);
if (error != 0) if (error != 0)
return (error); return (error);
@ -1391,8 +1402,8 @@ mdcreate_vnode(struct md_s *sc, struct md_ioctl *mdio, struct thread *td)
* If the user specified that this is a read only device, don't * If the user specified that this is a read only device, don't
* set the FWRITE mask before trying to open the backing store. * set the FWRITE mask before trying to open the backing store.
*/ */
flags = FREAD | ((mdio->md_options & MD_READONLY) ? 0 : FWRITE) \ flags = FREAD | ((mdr->md_options & MD_READONLY) ? 0 : FWRITE) \
| ((mdio->md_options & MD_VERIFY) ? O_VERIFY : 0); | ((mdr->md_options & MD_VERIFY) ? O_VERIFY : 0);
NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, sc->file, td); NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, sc->file, td);
error = vn_open(&nd, &flags, 0, NULL); error = vn_open(&nd, &flags, 0, NULL);
if (error != 0) if (error != 0)
@ -1416,13 +1427,13 @@ mdcreate_vnode(struct md_s *sc, struct md_ioctl *mdio, struct thread *td)
nd.ni_vp->v_vflag |= VV_MD; nd.ni_vp->v_vflag |= VV_MD;
VOP_UNLOCK(nd.ni_vp, 0); VOP_UNLOCK(nd.ni_vp, 0);
if (mdio->md_fwsectors != 0) if (mdr->md_fwsectors != 0)
sc->fwsectors = mdio->md_fwsectors; sc->fwsectors = mdr->md_fwsectors;
if (mdio->md_fwheads != 0) if (mdr->md_fwheads != 0)
sc->fwheads = mdio->md_fwheads; sc->fwheads = mdr->md_fwheads;
snprintf(sc->ident, sizeof(sc->ident), "MD-DEV%ju-INO%ju", snprintf(sc->ident, sizeof(sc->ident), "MD-DEV%ju-INO%ju",
(uintmax_t)vattr.va_fsid, (uintmax_t)vattr.va_fileid); (uintmax_t)vattr.va_fsid, (uintmax_t)vattr.va_fileid);
sc->flags = mdio->md_options & (MD_FORCE | MD_ASYNC | MD_VERIFY); sc->flags = mdr->md_options & (MD_FORCE | MD_ASYNC | MD_VERIFY);
if (!(flags & FWRITE)) if (!(flags & FWRITE))
sc->flags |= MD_READONLY; sc->flags |= MD_READONLY;
sc->vnode = nd.ni_vp; sc->vnode = nd.ni_vp;
@ -1488,7 +1499,7 @@ mddestroy(struct md_s *sc, struct thread *td)
} }
static int static int
mdresize(struct md_s *sc, struct md_ioctl *mdio) mdresize(struct md_s *sc, struct md_req *mdr)
{ {
int error, res; int error, res;
vm_pindex_t oldpages, newpages; vm_pindex_t oldpages, newpages;
@ -1498,11 +1509,11 @@ mdresize(struct md_s *sc, struct md_ioctl *mdio)
case MD_NULL: case MD_NULL:
break; break;
case MD_SWAP: case MD_SWAP:
if (mdio->md_mediasize <= 0 || if (mdr->md_mediasize <= 0 ||
(mdio->md_mediasize % PAGE_SIZE) != 0) (mdr->md_mediasize % PAGE_SIZE) != 0)
return (EDOM); return (EDOM);
oldpages = OFF_TO_IDX(round_page(sc->mediasize)); oldpages = OFF_TO_IDX(round_page(sc->mediasize));
newpages = OFF_TO_IDX(round_page(mdio->md_mediasize)); newpages = OFF_TO_IDX(round_page(mdr->md_mediasize));
if (newpages < oldpages) { if (newpages < oldpages) {
VM_OBJECT_WLOCK(sc->object); VM_OBJECT_WLOCK(sc->object);
vm_object_page_remove(sc->object, newpages, 0, 0); vm_object_page_remove(sc->object, newpages, 0, 0);
@ -1518,7 +1529,7 @@ mdresize(struct md_s *sc, struct md_ioctl *mdio)
oldpages), sc->cred); oldpages), sc->cred);
if (!res) if (!res)
return (ENOMEM); return (ENOMEM);
if ((mdio->md_options & MD_RESERVE) || if ((mdr->md_options & MD_RESERVE) ||
(sc->flags & MD_RESERVE)) { (sc->flags & MD_RESERVE)) {
error = swap_pager_reserve(sc->object, error = swap_pager_reserve(sc->object,
oldpages, newpages - oldpages); oldpages, newpages - oldpages);
@ -1539,7 +1550,7 @@ mdresize(struct md_s *sc, struct md_ioctl *mdio)
return (EOPNOTSUPP); return (EOPNOTSUPP);
} }
sc->mediasize = mdio->md_mediasize; sc->mediasize = mdr->md_mediasize;
g_topology_lock(); g_topology_lock();
g_resize_provider(sc->pp, sc->mediasize); g_resize_provider(sc->pp, sc->mediasize);
g_topology_unlock(); g_topology_unlock();
@ -1547,7 +1558,7 @@ mdresize(struct md_s *sc, struct md_ioctl *mdio)
} }
static int static int
mdcreate_swap(struct md_s *sc, struct md_ioctl *mdio, struct thread *td) mdcreate_swap(struct md_s *sc, struct md_req *mdr, struct thread *td)
{ {
vm_ooffset_t npage; vm_ooffset_t npage;
int error; int error;
@ -1565,19 +1576,19 @@ mdcreate_swap(struct md_s *sc, struct md_ioctl *mdio, struct thread *td)
* Note the truncation. * Note the truncation.
*/ */
if ((mdio->md_options & MD_VERIFY) != 0) if ((mdr->md_options & MD_VERIFY) != 0)
return (EINVAL); return (EINVAL);
npage = mdio->md_mediasize / PAGE_SIZE; npage = mdr->md_mediasize / PAGE_SIZE;
if (mdio->md_fwsectors != 0) if (mdr->md_fwsectors != 0)
sc->fwsectors = mdio->md_fwsectors; sc->fwsectors = mdr->md_fwsectors;
if (mdio->md_fwheads != 0) if (mdr->md_fwheads != 0)
sc->fwheads = mdio->md_fwheads; sc->fwheads = mdr->md_fwheads;
sc->object = vm_pager_allocate(OBJT_SWAP, NULL, PAGE_SIZE * npage, sc->object = vm_pager_allocate(OBJT_SWAP, NULL, PAGE_SIZE * npage,
VM_PROT_DEFAULT, 0, td->td_ucred); VM_PROT_DEFAULT, 0, td->td_ucred);
if (sc->object == NULL) if (sc->object == NULL)
return (ENOMEM); return (ENOMEM);
sc->flags = mdio->md_options & (MD_FORCE | MD_RESERVE); sc->flags = mdr->md_options & (MD_FORCE | MD_RESERVE);
if (mdio->md_options & MD_RESERVE) { if (mdr->md_options & MD_RESERVE) {
if (swap_pager_reserve(sc->object, 0, npage) < 0) { if (swap_pager_reserve(sc->object, 0, npage) < 0) {
error = EDOM; error = EDOM;
goto finish; goto finish;
@ -1593,7 +1604,7 @@ mdcreate_swap(struct md_s *sc, struct md_ioctl *mdio, struct thread *td)
} }
static int static int
mdcreate_null(struct md_s *sc, struct md_ioctl *mdio, struct thread *td) mdcreate_null(struct md_s *sc, struct md_req *mdr, struct thread *td)
{ {
/* /*
@ -1607,7 +1618,7 @@ mdcreate_null(struct md_s *sc, struct md_ioctl *mdio, struct thread *td)
} }
static int static int
kern_mdattach_locked(struct thread *td, struct md_ioctl *mdio) kern_mdattach_locked(struct thread *td, struct md_req *mdr)
{ {
struct md_s *sc; struct md_s *sc;
unsigned sectsize; unsigned sectsize;
@ -1615,7 +1626,7 @@ kern_mdattach_locked(struct thread *td, struct md_ioctl *mdio)
sx_assert(&md_sx, SA_XLOCKED); sx_assert(&md_sx, SA_XLOCKED);
switch (mdio->md_type) { switch (mdr->md_type) {
case MD_MALLOC: case MD_MALLOC:
case MD_PRELOAD: case MD_PRELOAD:
case MD_VNODE: case MD_VNODE:
@ -1625,35 +1636,35 @@ kern_mdattach_locked(struct thread *td, struct md_ioctl *mdio)
default: default:
return (EINVAL); return (EINVAL);
} }
if (mdio->md_sectorsize == 0) if (mdr->md_sectorsize == 0)
sectsize = DEV_BSIZE; sectsize = DEV_BSIZE;
else else
sectsize = mdio->md_sectorsize; sectsize = mdr->md_sectorsize;
if (sectsize > MAXPHYS || mdio->md_mediasize < sectsize) if (sectsize > MAXPHYS || mdr->md_mediasize < sectsize)
return (EINVAL); return (EINVAL);
if (mdio->md_options & MD_AUTOUNIT) if (mdr->md_options & MD_AUTOUNIT)
sc = mdnew(-1, &error, mdio->md_type); sc = mdnew(-1, &error, mdr->md_type);
else { else {
if (mdio->md_unit > INT_MAX) if (mdr->md_unit > INT_MAX)
return (EINVAL); return (EINVAL);
sc = mdnew(mdio->md_unit, &error, mdio->md_type); sc = mdnew(mdr->md_unit, &error, mdr->md_type);
} }
if (sc == NULL) if (sc == NULL)
return (error); return (error);
if (mdio->md_label != NULL) if (mdr->md_label != NULL)
error = copyinstr(mdio->md_label, sc->label, error = copyinstr(mdr->md_label, sc->label,
sizeof(sc->label), NULL); sizeof(sc->label), NULL);
if (error != 0) if (error != 0)
goto err_after_new; goto err_after_new;
if (mdio->md_options & MD_AUTOUNIT) if (mdr->md_options & MD_AUTOUNIT)
mdio->md_unit = sc->unit; mdr->md_unit = sc->unit;
sc->mediasize = mdio->md_mediasize; sc->mediasize = mdr->md_mediasize;
sc->sectorsize = sectsize; sc->sectorsize = sectsize;
error = EDOOFUS; error = EDOOFUS;
switch (sc->type) { switch (sc->type) {
case MD_MALLOC: case MD_MALLOC:
sc->start = mdstart_malloc; sc->start = mdstart_malloc;
error = mdcreate_malloc(sc, mdio); error = mdcreate_malloc(sc, mdr);
break; break;
case MD_PRELOAD: case MD_PRELOAD:
/* /*
@ -1665,15 +1676,15 @@ kern_mdattach_locked(struct thread *td, struct md_ioctl *mdio)
break; break;
case MD_VNODE: case MD_VNODE:
sc->start = mdstart_vnode; sc->start = mdstart_vnode;
error = mdcreate_vnode(sc, mdio, td); error = mdcreate_vnode(sc, mdr, td);
break; break;
case MD_SWAP: case MD_SWAP:
sc->start = mdstart_swap; sc->start = mdstart_swap;
error = mdcreate_swap(sc, mdio, td); error = mdcreate_swap(sc, mdr, td);
break; break;
case MD_NULL: case MD_NULL:
sc->start = mdstart_null; sc->start = mdstart_null;
error = mdcreate_null(sc, mdio, td); error = mdcreate_null(sc, mdr, td);
break; break;
} }
err_after_new: err_after_new:
@ -1691,122 +1702,122 @@ kern_mdattach_locked(struct thread *td, struct md_ioctl *mdio)
} }
static int static int
kern_mdattach(struct thread *td, struct md_ioctl *mdio) kern_mdattach(struct thread *td, struct md_req *mdr)
{ {
int error; int error;
sx_xlock(&md_sx); sx_xlock(&md_sx);
error = kern_mdattach_locked(td, mdio); error = kern_mdattach_locked(td, mdr);
sx_xunlock(&md_sx); sx_xunlock(&md_sx);
return (error); return (error);
} }
static int static int
kern_mddetach_locked(struct thread *td, struct md_ioctl *mdio) kern_mddetach_locked(struct thread *td, struct md_req *mdr)
{ {
struct md_s *sc; struct md_s *sc;
sx_assert(&md_sx, SA_XLOCKED); sx_assert(&md_sx, SA_XLOCKED);
if (mdio->md_mediasize != 0 || if (mdr->md_mediasize != 0 ||
(mdio->md_options & ~MD_FORCE) != 0) (mdr->md_options & ~MD_FORCE) != 0)
return (EINVAL); return (EINVAL);
sc = mdfind(mdio->md_unit); sc = mdfind(mdr->md_unit);
if (sc == NULL) if (sc == NULL)
return (ENOENT); return (ENOENT);
if (sc->opencount != 0 && !(sc->flags & MD_FORCE) && if (sc->opencount != 0 && !(sc->flags & MD_FORCE) &&
!(mdio->md_options & MD_FORCE)) !(mdr->md_options & MD_FORCE))
return (EBUSY); return (EBUSY);
return (mddestroy(sc, td)); return (mddestroy(sc, td));
} }
static int static int
kern_mddetach(struct thread *td, struct md_ioctl *mdio) kern_mddetach(struct thread *td, struct md_req *mdr)
{ {
int error; int error;
sx_xlock(&md_sx); sx_xlock(&md_sx);
error = kern_mddetach_locked(td, mdio); error = kern_mddetach_locked(td, mdr);
sx_xunlock(&md_sx); sx_xunlock(&md_sx);
return (error); return (error);
} }
static int static int
kern_mdresize_locked(struct md_ioctl *mdio) kern_mdresize_locked(struct md_req *mdr)
{ {
struct md_s *sc; struct md_s *sc;
sx_assert(&md_sx, SA_XLOCKED); sx_assert(&md_sx, SA_XLOCKED);
if ((mdio->md_options & ~(MD_FORCE | MD_RESERVE)) != 0) if ((mdr->md_options & ~(MD_FORCE | MD_RESERVE)) != 0)
return (EINVAL); return (EINVAL);
sc = mdfind(mdio->md_unit); sc = mdfind(mdr->md_unit);
if (sc == NULL) if (sc == NULL)
return (ENOENT); return (ENOENT);
if (mdio->md_mediasize < sc->sectorsize) if (mdr->md_mediasize < sc->sectorsize)
return (EINVAL); return (EINVAL);
if (mdio->md_mediasize < sc->mediasize && if (mdr->md_mediasize < sc->mediasize &&
!(sc->flags & MD_FORCE) && !(sc->flags & MD_FORCE) &&
!(mdio->md_options & MD_FORCE)) !(mdr->md_options & MD_FORCE))
return (EBUSY); return (EBUSY);
return (mdresize(sc, mdio)); return (mdresize(sc, mdr));
} }
static int static int
kern_mdresize(struct md_ioctl *mdio) kern_mdresize(struct md_req *mdr)
{ {
int error; int error;
sx_xlock(&md_sx); sx_xlock(&md_sx);
error = kern_mdresize_locked(mdio); error = kern_mdresize_locked(mdr);
sx_xunlock(&md_sx); sx_xunlock(&md_sx);
return (error); return (error);
} }
static int static int
kern_mdquery_locked(struct md_ioctl *mdio) kern_mdquery_locked(struct md_req *mdr)
{ {
struct md_s *sc; struct md_s *sc;
int error; int error;
sx_assert(&md_sx, SA_XLOCKED); sx_assert(&md_sx, SA_XLOCKED);
sc = mdfind(mdio->md_unit); sc = mdfind(mdr->md_unit);
if (sc == NULL) if (sc == NULL)
return (ENOENT); return (ENOENT);
mdio->md_type = sc->type; mdr->md_type = sc->type;
mdio->md_options = sc->flags; mdr->md_options = sc->flags;
mdio->md_mediasize = sc->mediasize; mdr->md_mediasize = sc->mediasize;
mdio->md_sectorsize = sc->sectorsize; mdr->md_sectorsize = sc->sectorsize;
error = 0; error = 0;
if (mdio->md_label != NULL) { if (mdr->md_label != NULL) {
error = copyout(sc->label, mdio->md_label, error = copyout(sc->label, mdr->md_label,
strlen(sc->label) + 1); strlen(sc->label) + 1);
if (error != 0) if (error != 0)
return (error); return (error);
} }
if (sc->type == MD_VNODE || if (sc->type == MD_VNODE ||
(sc->type == MD_PRELOAD && mdio->md_file != NULL)) (sc->type == MD_PRELOAD && mdr->md_file != NULL))
error = copyout(sc->file, mdio->md_file, error = copyout(sc->file, mdr->md_file,
strlen(sc->file) + 1); strlen(sc->file) + 1);
return (error); return (error);
} }
static int static int
kern_mdquery(struct md_ioctl *mdio) kern_mdquery(struct md_req *mdr)
{ {
int error; int error;
sx_xlock(&md_sx); sx_xlock(&md_sx);
error = kern_mdquery_locked(mdio); error = kern_mdquery_locked(mdr);
sx_xunlock(&md_sx); sx_xunlock(&md_sx);
return (error); return (error);
} }
static int static int
kern_mdlist_locked(struct md_ioctl *mdio) kern_mdlist_locked(struct md_req *mdr)
{ {
struct md_s *sc; struct md_s *sc;
int i; int i;
@ -1814,9 +1825,9 @@ kern_mdlist_locked(struct md_ioctl *mdio)
sx_assert(&md_sx, SA_XLOCKED); sx_assert(&md_sx, SA_XLOCKED);
/* /*
* Write the number of md devices to mdio->md_pad[0]. * Write the number of md devices to mdr->md_units[0].
* Write the unit number of the first (MDNPAD - 2) units * Write the unit number of the first (mdr->md_units_nitems - 2)
* to mdio->md_pad[1::(MDNPAD - 2)] and terminate the * units to mdr->md_units[1::(mdr->md_units - 2)] and terminate the
* list with -1. * list with -1.
* *
* XXX: There is currently no mechanism to retrieve unit * XXX: There is currently no mechanism to retrieve unit
@ -1827,22 +1838,22 @@ kern_mdlist_locked(struct md_ioctl *mdio)
*/ */
i = 1; i = 1;
LIST_FOREACH(sc, &md_softc_list, list) { LIST_FOREACH(sc, &md_softc_list, list) {
if (i < MDNPAD - 1) if (i < mdr->md_units_nitems - 1)
mdio->md_pad[i] = sc->unit; mdr->md_units[i] = sc->unit;
i++; i++;
} }
mdio->md_pad[MIN(i, MDNPAD - 1)] = -1; mdr->md_units[MIN(i, mdr->md_units_nitems - 1)] = -1;
mdio->md_pad[0] = i - 1; mdr->md_units[0] = i - 1;
return (0); return (0);
} }
static int static int
kern_mdlist(struct md_ioctl *mdio) kern_mdlist(struct md_req *mdr)
{ {
int error; int error;
sx_xlock(&md_sx); sx_xlock(&md_sx);
error = kern_mdlist_locked(mdio); error = kern_mdlist_locked(mdr);
sx_xunlock(&md_sx); sx_xunlock(&md_sx);
return (error); return (error);
} }
@ -1851,6 +1862,7 @@ static int
mdctlioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flags, mdctlioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flags,
struct thread *td) struct thread *td)
{ {
struct md_req mdr;
struct md_ioctl *mdio; struct md_ioctl *mdio;
int error; int error;
@ -1858,37 +1870,67 @@ mdctlioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flags,
printf("mdctlioctl(%s %lx %p %x %p)\n", printf("mdctlioctl(%s %lx %p %x %p)\n",
devtoname(dev), cmd, addr, flags, td); devtoname(dev), cmd, addr, flags, td);
mdio = (struct md_ioctl *)addr; switch (cmd) {
if (mdio->md_version != MDIOVERSION) case MDIOCATTACH:
return (EINVAL); case MDIOCDETACH:
case MDIOCRESIZE:
case MDIOCQUERY:
case MDIOCLIST:
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;
mdr.md_file = mdio->md_file;
/* 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;
}
/*
* We assert the version number in the individual ioctl
* handlers instead of out here because (a) it is possible we
* may add another ioctl in the future which doesn't read an
* mdio, and (b) the correct return value for an unknown ioctl
* is ENOIOCTL, not EINVAL.
*/
error = 0; error = 0;
switch (cmd) { switch (cmd) {
case MDIOCATTACH: case MDIOCATTACH:
error = kern_mdattach(td, mdio); error = kern_mdattach(td, &mdr);
break; break;
case MDIOCDETACH: case MDIOCDETACH:
error = kern_mddetach(td, mdio); error = kern_mddetach(td, &mdr);
break; break;
case MDIOCRESIZE: case MDIOCRESIZE:
error = kern_mdresize(mdio); error = kern_mdresize(&mdr);
break; break;
case MDIOCQUERY: case MDIOCQUERY:
error = kern_mdquery(mdio); error = kern_mdquery(&mdr);
break; break;
case MDIOCLIST: case MDIOCLIST:
error = kern_mdlist(mdio); error = kern_mdlist(&mdr);
break; break;
default: default:
error = ENOIOCTL; error = ENOIOCTL;
}; }
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;
break;
}
return (error); return (error);
} }