/*
- * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2019 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
+ *
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
- *
+ *
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
+ *
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
- *
+ *
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#include "shadow.h"
-static void
-vndevice_do_init(void) __attribute__((section("__TEXT, initcode")));
+static void
+vndevice_do_init(void);
-static ioctl_fcn_t vnioctl_chr;
-static ioctl_fcn_t vnioctl_blk;
-static open_close_fcn_t vnopen;
-static open_close_fcn_t vnclose;
-static psize_fcn_t vnsize;
-static strategy_fcn_t vnstrategy;
-static read_write_fcn_t vnread;
-static read_write_fcn_t vnwrite;
+static ioctl_fcn_t vnioctl_chr;
+static ioctl_fcn_t vnioctl_blk;
+static open_close_fcn_t vnopen;
+static open_close_fcn_t vnclose;
+static psize_fcn_t vnsize;
+static strategy_fcn_t vnstrategy;
+static read_write_fcn_t vnread;
+static read_write_fcn_t vnwrite;
-static int vndevice_bdev_major;
-static int vndevice_cdev_major;
+static int vndevice_bdev_major;
+static int vndevice_cdev_major;
/*
* cdevsw
* D_CANFREE We support B_FREEBUF
*/
-static struct bdevsw vn_bdevsw = {
- /* open */ vnopen,
- /* close */ vnclose,
- /* strategy */ vnstrategy,
- /* ioctl */ vnioctl_blk,
- /* dump */ eno_dump,
- /* psize */ vnsize,
- /* flags */ D_DISK,
+static const struct bdevsw vn_bdevsw = {
+ .d_open = vnopen,
+ .d_close = vnclose,
+ .d_strategy = vnstrategy,
+ .d_ioctl = vnioctl_blk,
+ .d_dump = eno_dump,
+ .d_psize = vnsize,
+ .d_type = D_DISK,
};
-static struct cdevsw vn_cdevsw = {
- /* open */ vnopen,
- /* close */ vnclose,
- /* read */ vnread,
- /* write */ vnwrite,
- /* ioctl */ vnioctl_chr,
- /* stop */ eno_stop,
- /* reset */ eno_reset,
- /* ttys */ NULL,
- /* select */ eno_select,
- /* mmap */ eno_mmap,
- /* strategy */ eno_strat,
- /* getc */ eno_getc,
- /* putc */ eno_putc,
- /* flags */ D_DISK,
+static const struct cdevsw vn_cdevsw = {
+ .d_open = vnopen,
+ .d_close = vnclose,
+ .d_read = vnread,
+ .d_write = vnwrite,
+ .d_ioctl = vnioctl_chr,
+ .d_stop = eno_stop,
+ .d_reset = eno_reset,
+ .d_ttys = NULL,
+ .d_select = eno_select,
+ .d_mmap = eno_mmap,
+ .d_strategy = eno_strat,
+ .d_reserved_1 = eno_getc,
+ .d_reserved_2 = eno_putc,
+ .d_type = D_DISK,
};
struct vn_softc {
- u_int64_t sc_fsize; /* file size in bytes */
- u_int64_t sc_size; /* size of vn, sc_secsize scale */
- int sc_flags; /* flags */
- u_int32_t sc_secsize; /* sector size */
- struct vnode *sc_vp; /* vnode if not NULL */
- uint32_t sc_vid;
- int sc_open_flags;
- struct vnode *sc_shadow_vp; /* shadow vnode if not NULL */
- uint32_t sc_shadow_vid;
- shadow_map_t * sc_shadow_map; /* shadow map if not NULL */
- kauth_cred_t sc_cred; /* credentials */
- u_int32_t sc_options; /* options */
- void * sc_bdev;
- void * sc_cdev;
+ u_int64_t sc_fsize; /* file size in bytes */
+ u_int64_t sc_size; /* size of vn, sc_secsize scale */
+ int sc_flags; /* flags */
+ u_int32_t sc_secsize; /* sector size */
+ struct vnode *sc_vp; /* vnode if not NULL */
+ uint32_t sc_vid;
+ int sc_open_flags;
+ struct vnode *sc_shadow_vp; /* shadow vnode if not NULL */
+ uint32_t sc_shadow_vid;
+ shadow_map_t * sc_shadow_map; /* shadow map if not NULL */
+ kauth_cred_t sc_cred; /* credentials */
+ u_int32_t sc_options; /* options */
+ void * sc_bdev;
+ void * sc_cdev;
} vn_table[NVNDEVICE];
-#define ROOT_IMAGE_UNIT 0
+#define ROOT_IMAGE_UNIT 0
/* sc_flags */
-#define VNF_INITED 0x01
-#define VNF_READONLY 0x02
+#define VNF_INITED 0x01
+#define VNF_READONLY 0x02
-static u_int32_t vn_options;
+static u_int32_t vn_options;
-#define IFOPT(vn,opt) if (((vn)->sc_options|vn_options) & (opt))
-#define TESTOPT(vn,opt) (((vn)->sc_options|vn_options) & (opt))
+#define IFOPT(vn, opt) if (((vn)->sc_options|vn_options) & (opt))
+#define TESTOPT(vn, opt) (((vn)->sc_options|vn_options) & (opt))
-static int setcred(struct vnode * vp, kauth_cred_t cred);
-static void vnclear (struct vn_softc *vn, vfs_context_t ctx);
+static int setcred(struct vnode * vp, kauth_cred_t cred);
+static void vnclear(struct vn_softc *vn, vfs_context_t ctx);
static void vn_ioctl_to_64(struct vn_ioctl_32 *from, struct vn_ioctl_64 *to);
void vndevice_init(void);
int vndevice_root_image(char * path, char devname[], dev_t * dev_p);
static int
vniocattach_file(struct vn_softc *vn,
- struct vn_ioctl_64 *vniop,
- dev_t dev,
- int in_kernel,
- proc_t p);
+ struct vn_ioctl_64 *vniop,
+ dev_t dev,
+ int in_kernel,
+ proc_t p);
static int
vniocattach_shadow(struct vn_softc * vn,
- struct vn_ioctl_64 *vniop,
- dev_t dev,
- int in_kernel,
- proc_t p);
+ struct vn_ioctl_64 *vniop,
+ dev_t dev,
+ int in_kernel,
+ proc_t p);
static __inline__ int
vnunit(dev_t dev)
{
- return (minor(dev));
+ return minor(dev);
}
-static int
-vnclose(__unused dev_t dev, __unused int flags,
- __unused int devtype, __unused proc_t p)
+static int
+vnclose(__unused dev_t dev, __unused int flags,
+ __unused int devtype, __unused proc_t p)
{
- return (0);
+ return 0;
}
-static int
+static int
vnopen(dev_t dev, int flags, __unused int devtype, __unused proc_t p)
{
struct vn_softc *vn;
unit = vnunit(dev);
if (vnunit(dev) >= NVNDEVICE) {
- return (ENXIO);
+ return ENXIO;
}
vn = vn_table + unit;
- if ((flags & FWRITE) && (vn->sc_flags & VNF_READONLY))
- return (EACCES);
+ if ((flags & FWRITE) && (vn->sc_flags & VNF_READONLY)) {
+ return EACCES;
+ }
- return(0);
+ return 0;
}
static int
-file_io(struct vnode * vp, vfs_context_t ctx,
- enum uio_rw op, char * base, off_t offset, user_ssize_t count,
- user_ssize_t * resid)
+file_io(struct vnode * vp, vfs_context_t ctx,
+ enum uio_rw op, char * base, off_t offset, user_ssize_t count,
+ user_ssize_t * resid)
{
- uio_t auio;
- int error;
- char uio_buf[UIO_SIZEOF(1)];
-
- auio = uio_createwithbuffer(1, offset, UIO_SYSSPACE, op,
- &uio_buf[0], sizeof(uio_buf));
+ uio_t auio;
+ int error;
+ char uio_buf[UIO_SIZEOF(1)];
+
+ auio = uio_createwithbuffer(1, offset, UIO_SYSSPACE, op,
+ &uio_buf[0], sizeof(uio_buf));
uio_addiov(auio, CAST_USER_ADDR_T(base), count);
- if (op == UIO_READ)
+ if (op == UIO_READ) {
error = VNOP_READ(vp, auio, IO_SYNC, ctx);
- else
+ } else {
error = VNOP_WRITE(vp, auio, IO_SYNC, ctx);
+ }
if (resid != NULL) {
*resid = uio_resid(auio);
}
- return (error);
+ return error;
}
static __inline__ off_t
block_round(off_t o, int blocksize)
{
- return ((o + blocksize - 1) / blocksize);
+ return (o + blocksize - 1) / blocksize;
}
static __inline__ off_t
block_truncate(off_t o, int blocksize)
{
- return (o / blocksize);
+ return o / blocksize;
}
static __inline__ int
block_remainder(off_t o, int blocksize)
{
- return (o % blocksize);
+ return o % blocksize;
}
static int
-vnread_shadow(struct vn_softc * vn, struct uio *uio, int ioflag,
- vfs_context_t ctx)
+vnread_shadow(struct vn_softc * vn, struct uio *uio, int ioflag,
+ vfs_context_t ctx)
{
- u_int32_t blocksize = vn->sc_secsize;
- int error = 0;
- off_t offset;
- user_ssize_t resid;
- off_t orig_offset;
- user_ssize_t orig_resid;
+ u_int32_t blocksize = vn->sc_secsize;
+ int error = 0;
+ off_t offset;
+ user_ssize_t resid;
+ off_t orig_offset;
+ user_ssize_t orig_resid;
orig_resid = resid = uio_resid(uio);
orig_offset = offset = uio_offset(uio);
while (resid > 0) {
- u_int32_t remainder;
- u_int32_t this_block_number;
- u_int32_t this_block_count;
- off_t this_offset;
- user_ssize_t this_resid;
- struct vnode * vp;
+ u_int32_t remainder;
+ off_t this_block_number;
+ size_t this_block_count;
+ off_t this_offset;
+ user_ssize_t this_resid;
+ struct vnode * vp;
/* figure out which blocks to read */
remainder = block_remainder(offset, blocksize);
if (shadow_map_read(vn->sc_shadow_map,
- block_truncate(offset, blocksize),
- block_round(resid + remainder, blocksize),
- &this_block_number, &this_block_count)) {
+ block_truncate(offset, blocksize),
+ block_round(resid + remainder, blocksize),
+ &this_block_number, &this_block_count)) {
vp = vn->sc_shadow_vp;
- }
- else {
+ } else {
vp = vn->sc_vp;
}
/* read the blocks (or parts thereof) */
- this_offset = (off_t)this_block_number * blocksize + remainder;
+ this_offset = this_block_number * blocksize + remainder;
uio_setoffset(uio, this_offset);
this_resid = this_block_count * blocksize - remainder;
if (this_resid > resid) {
}
uio_setresid(uio, resid);
uio_setoffset(uio, offset);
- return (error);
+ return error;
}
static int
vncopy_block_to_shadow(struct vn_softc * vn, vfs_context_t ctx,
- u_int32_t file_block, u_int32_t shadow_block)
+ off_t file_block, off_t shadow_block)
{
- int error;
- char * tmpbuf;
+ int error;
+ char * tmpbuf;
tmpbuf = _MALLOC(vn->sc_secsize, M_TEMP, M_WAITOK);
if (tmpbuf == NULL) {
- return (ENOMEM);
+ return ENOMEM;
}
/* read one block from file at file_block offset */
error = file_io(vn->sc_vp, ctx, UIO_READ,
- tmpbuf, (off_t)file_block * vn->sc_secsize,
- vn->sc_secsize, NULL);
+ tmpbuf, file_block * vn->sc_secsize,
+ vn->sc_secsize, NULL);
if (error) {
goto done;
}
/* write one block to shadow file at shadow_block offset */
error = file_io(vn->sc_shadow_vp, ctx, UIO_WRITE,
- tmpbuf, (off_t)shadow_block * vn->sc_secsize,
- vn->sc_secsize, NULL);
- done:
+ tmpbuf, shadow_block * vn->sc_secsize,
+ vn->sc_secsize, NULL);
+done:
FREE(tmpbuf, M_TEMP);
- return (error);
+ return error;
}
enum {
};
static int
-vnwrite_shadow(struct vn_softc * vn, struct uio *uio, int ioflag,
- vfs_context_t ctx)
+vnwrite_shadow(struct vn_softc * vn, struct uio *uio, int ioflag,
+ vfs_context_t ctx)
{
- u_int32_t blocksize = vn->sc_secsize;
- int error = 0;
- user_ssize_t resid;
- off_t offset;
+ u_int32_t blocksize = vn->sc_secsize;
+ int error = 0;
+ user_ssize_t resid;
+ off_t offset;
resid = uio_resid(uio);
offset = uio_offset(uio);
while (resid > 0) {
- int flags = 0;
- u_int32_t offset_block_number;
- u_int32_t remainder;
- u_int32_t resid_block_count;
- u_int32_t shadow_block_count;
- u_int32_t shadow_block_number;
- user_ssize_t this_resid;
+ int flags = 0;
+ off_t offset_block_number;
+ u_int32_t remainder;
+ size_t resid_block_count;
+ size_t shadow_block_count;
+ off_t shadow_block_number;
+ user_ssize_t this_resid;
/* figure out which blocks to write */
offset_block_number = block_truncate(offset, blocksize);
/* figure out if the first or last blocks are partial writes */
if (remainder > 0
&& !shadow_map_is_written(vn->sc_shadow_map,
- offset_block_number)) {
+ offset_block_number)) {
/* the first block is a partial write */
flags |= FLAGS_FIRST_BLOCK_PARTIAL;
}
if (resid_block_count > 1
&& !shadow_map_is_written(vn->sc_shadow_map,
- offset_block_number
- + resid_block_count - 1)
+ offset_block_number
+ + resid_block_count - 1)
&& block_remainder(offset + resid, blocksize) > 0) {
/* the last block is a partial write */
flags |= FLAGS_LAST_BLOCK_PARTIAL;
}
if (shadow_map_write(vn->sc_shadow_map,
- offset_block_number, resid_block_count,
- &shadow_block_number,
- &shadow_block_count)) {
+ offset_block_number, resid_block_count,
+ &shadow_block_number,
+ &shadow_block_count)) {
/* shadow file is growing */
#if 0
/* truncate the file to its new length before write */
- off_t size;
- size = (off_t)shadow_map_shadow_size(vn->sc_shadow_map)
- * vn->sc_secsize;
+ off_t size;
+ size = (off_t)shadow_map_shadow_size(vn->sc_shadow_map)
+ * vn->sc_secsize;
vnode_setsize(vn->sc_shadow_vp, size, IO_SYNC, ctx);
#endif
}
/* write the blocks (or parts thereof) */
- uio_setoffset(uio, (off_t)
- shadow_block_number * blocksize + remainder);
- this_resid = (off_t)shadow_block_count * blocksize - remainder;
+ uio_setoffset(uio, shadow_block_number * blocksize + remainder);
+ this_resid = shadow_block_count * blocksize - remainder;
if (this_resid >= resid) {
this_resid = resid;
if ((flags & FLAGS_LAST_BLOCK_PARTIAL) != 0) {
/* copy the last block to the shadow */
- u_int32_t d;
- u_int32_t s;
+ off_t d;
+ off_t s;
- s = offset_block_number
- + resid_block_count - 1;
- d = shadow_block_number
- + shadow_block_count - 1;
+ s = offset_block_number
+ + resid_block_count - 1;
+ d = shadow_block_number
+ + shadow_block_count - 1;
error = vncopy_block_to_shadow(vn, ctx, s, d);
if (error) {
printf("vnwrite_shadow: failed to copy"
- " block %u to shadow block %u\n",
- s, d);
+ " block %lld to shadow block %lld\n",
+ s, d);
break;
}
}
if ((flags & FLAGS_FIRST_BLOCK_PARTIAL) != 0) {
/* copy the first block to the shadow */
error = vncopy_block_to_shadow(vn, ctx,
- offset_block_number,
- shadow_block_number);
+ offset_block_number,
+ shadow_block_number);
if (error) {
printf("vnwrite_shadow: failed to"
- " copy block %u to shadow block %u\n",
- offset_block_number,
- shadow_block_number);
+ " copy block %lld to shadow block %lld\n",
+ offset_block_number,
+ shadow_block_number);
break;
}
}
}
uio_setresid(uio, resid);
uio_setoffset(uio, offset);
- return (error);
+ return error;
}
-static int
+static int
vnread(dev_t dev, struct uio *uio, int ioflag)
{
- struct vfs_context context;
- int error = 0;
- boolean_t funnel_state;
- off_t offset;
- proc_t p;
- user_ssize_t resid;
- struct vn_softc * vn;
- int unit;
+ struct vfs_context context;
+ int error = 0;
+ off_t offset;
+ proc_t p;
+ user_ssize_t resid;
+ struct vn_softc * vn;
+ int unit;
unit = vnunit(dev);
if (vnunit(dev) >= NVNDEVICE) {
- return (ENXIO);
+ return ENXIO;
}
p = current_proc();
- funnel_state = thread_funnel_set(kernel_flock, TRUE);
vn = vn_table + unit;
if ((vn->sc_flags & VNF_INITED) == 0) {
error = ENXIO;
if (vn->sc_shadow_vp != NULL) {
error = vnode_getwithvid(vn->sc_shadow_vp,
- vn->sc_shadow_vid);
+ vn->sc_shadow_vid);
if (error != 0) {
/* the vnode is no longer available, abort */
error = ENXIO;
error = VNOP_READ(vn->sc_vp, uio, ioflag, &context);
}
vnode_put(vn->sc_vp);
- done:
- (void) thread_funnel_set(kernel_flock, funnel_state);
- return (error);
+done:
+ return error;
}
-static int
+static int
vnwrite(dev_t dev, struct uio *uio, int ioflag)
{
- struct vfs_context context;
- int error;
- boolean_t funnel_state;
- off_t offset;
- proc_t p;
- user_ssize_t resid;
- struct vn_softc * vn;
- int unit;
+ struct vfs_context context;
+ int error;
+ off_t offset;
+ proc_t p;
+ user_ssize_t resid;
+ struct vn_softc * vn;
+ int unit;
unit = vnunit(dev);
if (vnunit(dev) >= NVNDEVICE) {
- return (ENXIO);
+ return ENXIO;
}
p = current_proc();
- funnel_state = thread_funnel_set(kernel_flock, TRUE);
vn = vn_table + unit;
if ((vn->sc_flags & VNF_INITED) == 0) {
error = ENXIO;
if (vn->sc_shadow_vp != NULL) {
error = vnode_getwithvid(vn->sc_shadow_vp,
- vn->sc_shadow_vid);
+ vn->sc_shadow_vid);
if (error != 0) {
/* the vnode is no longer available, abort */
error = ENXIO;
error = VNOP_WRITE(vn->sc_vp, uio, ioflag, &context);
}
vnode_put(vn->sc_vp);
- done:
- (void) thread_funnel_set(kernel_flock, funnel_state);
- return (error);
+done:
+ return error;
}
static int
shadow_read(struct vn_softc * vn, struct buf * bp, char * base,
- vfs_context_t ctx)
+ vfs_context_t ctx)
{
- u_int32_t blocksize = vn->sc_secsize;
- int error = 0;
- u_int32_t offset;
- boolean_t read_shadow;
- u_int32_t resid;
- u_int32_t start = 0;
+ u_int32_t blocksize = vn->sc_secsize;
+ int error = 0;
+ off_t offset;
+ boolean_t read_shadow;
+ size_t resid;
+ u_int32_t start = 0;
offset = buf_blkno(bp);
resid = buf_resid(bp) / blocksize;
while (resid > 0) {
- user_ssize_t temp_resid;
- u_int32_t this_offset;
- u_int32_t this_resid;
- struct vnode * vp;
+ user_ssize_t temp_resid;
+ off_t this_offset;
+ size_t this_resid;
+ struct vnode * vp;
read_shadow = shadow_map_read(vn->sc_shadow_map,
- offset, resid,
- &this_offset, &this_resid);
+ offset, resid,
+ &this_offset, &this_resid);
if (read_shadow) {
vp = vn->sc_shadow_vp;
- }
- else {
+ } else {
vp = vn->sc_vp;
}
error = file_io(vp, ctx, UIO_READ, base + start,
- (off_t)this_offset * blocksize,
- (user_ssize_t)this_resid * blocksize,
- &temp_resid);
+ this_offset * blocksize,
+ (user_ssize_t)this_resid * blocksize,
+ &temp_resid);
if (error) {
break;
}
offset += this_resid;
start += this_resid * blocksize;
}
- buf_setresid(bp, resid * blocksize);
- return (error);
+ buf_setresid(bp, (uint32_t)(resid * blocksize));
+ return error;
}
static int
-shadow_write(struct vn_softc * vn, struct buf * bp, char * base,
- vfs_context_t ctx)
+shadow_write(struct vn_softc * vn, struct buf * bp, char * base,
+ vfs_context_t ctx)
{
- u_int32_t blocksize = vn->sc_secsize;
- int error = 0;
- u_int32_t offset;
- boolean_t shadow_grew;
- u_int32_t resid;
- u_int32_t start = 0;
+ u_int32_t blocksize = vn->sc_secsize;
+ int error = 0;
+ off_t offset;
+ boolean_t shadow_grew;
+ size_t resid;
+ u_int32_t start = 0;
offset = buf_blkno(bp);
resid = buf_resid(bp) / blocksize;
while (resid > 0) {
- user_ssize_t temp_resid;
- u_int32_t this_offset;
- u_int32_t this_resid;
+ user_ssize_t temp_resid;
+ off_t this_offset;
+ size_t this_resid;
- shadow_grew = shadow_map_write(vn->sc_shadow_map,
- offset, resid,
- &this_offset, &this_resid);
+ shadow_grew = shadow_map_write(vn->sc_shadow_map,
+ offset, resid,
+ &this_offset, &this_resid);
if (shadow_grew) {
#if 0
- off_t size;
+ off_t size;
/* truncate the file to its new length before write */
- size = (off_t)shadow_map_shadow_size(vn->sc_shadow_map)
- * blocksize;
+ size = (off_t)shadow_map_shadow_size(vn->sc_shadow_map)
+ * blocksize;
vnode_setsize(vn->sc_shadow_vp, size, IO_SYNC, ctx);
#endif
}
- error = file_io(vn->sc_shadow_vp, ctx, UIO_WRITE,
- base + start,
- (off_t)this_offset * blocksize,
- (user_ssize_t)this_resid * blocksize,
- &temp_resid);
+ error = file_io(vn->sc_shadow_vp, ctx, UIO_WRITE,
+ base + start,
+ this_offset * blocksize,
+ (user_ssize_t)this_resid * blocksize,
+ &temp_resid);
if (error) {
break;
}
offset += this_resid;
start += this_resid * blocksize;
}
- buf_setresid(bp, resid * blocksize);
- return (error);
+ buf_setresid(bp, (uint32_t)(resid * blocksize));
+ return error;
}
static int
vn_readwrite_io(struct vn_softc * vn, struct buf * bp, vfs_context_t ctx)
{
- int error = 0;
- char * iov_base;
- caddr_t vaddr;
+ int error = 0;
+ char * iov_base;
+ caddr_t vaddr;
- if (buf_map(bp, &vaddr))
- panic("vn device: buf_map failed");
+ if (buf_map(bp, &vaddr)) {
+ panic("vn device: buf_map failed");
+ }
iov_base = (char *)vaddr;
if (vn->sc_shadow_vp == NULL) {
- user_ssize_t temp_resid;
+ user_ssize_t temp_resid;
error = file_io(vn->sc_vp, ctx,
- buf_flags(bp) & B_READ ? UIO_READ : UIO_WRITE,
- iov_base,
- (off_t)buf_blkno(bp) * vn->sc_secsize,
- buf_resid(bp), &temp_resid);
- buf_setresid(bp, temp_resid);
- }
- else {
- if (buf_flags(bp) & B_READ)
+ buf_flags(bp) & B_READ ? UIO_READ : UIO_WRITE,
+ iov_base,
+ (off_t)buf_blkno(bp) * vn->sc_secsize,
+ buf_resid(bp), &temp_resid);
+ buf_setresid(bp, (uint32_t)temp_resid);
+ } else {
+ if (buf_flags(bp) & B_READ) {
error = shadow_read(vn, bp, iov_base, ctx);
- else
+ } else {
error = shadow_write(vn, bp, iov_base, ctx);
+ }
}
buf_unmap(bp);
- return (error);
+ return error;
}
static void
{
struct vn_softc *vn;
int error = 0;
- long sz; /* in sc_secsize chunks */
+ long sz; /* in sc_secsize chunks */
daddr64_t blk_num;
- boolean_t funnel_state;
- struct vnode * shadow_vp = NULL;
- struct vnode * vp = NULL;
- struct vfs_context context;
+ struct vnode * shadow_vp = NULL;
+ struct vnode * vp = NULL;
+ struct vfs_context context;
- funnel_state = thread_funnel_set(kernel_flock, TRUE);
vn = vn_table + vnunit(buf_device(bp));
if ((vn->sc_flags & VNF_INITED) == 0) {
error = ENXIO;
* If the request crosses EOF, truncate the request.
*/
if ((blk_num + sz) > 0 && ((u_int64_t)(blk_num + sz)) > vn->sc_size) {
- buf_setcount(bp, (vn->sc_size - blk_num) * vn->sc_secsize);
+ buf_setcount(bp, (uint32_t)((vn->sc_size - blk_num) * vn->sc_secsize));
buf_setresid(bp, buf_count(bp));
}
vp = vn->sc_vp;
shadow_vp = vn->sc_shadow_vp;
if (shadow_vp != NULL) {
error = vnode_getwithvid(shadow_vp,
- vn->sc_shadow_vid);
+ vn->sc_shadow_vid);
if (error != 0) {
/* the vnode is no longer available, abort */
error = ENXIO;
vnode_put(shadow_vp);
}
- done:
- (void) thread_funnel_set(kernel_flock, funnel_state);
+done:
if (error) {
- buf_seterror(bp, error);
+ buf_seterror(bp, error);
}
buf_biodone(bp);
return;
}
/* ARGSUSED */
-static int
+static int
vnioctl(dev_t dev, u_long cmd, caddr_t data,
- __unused int flag, proc_t p,
- int is_char)
+ __unused int flag, proc_t p,
+ int is_char)
{
struct vn_softc *vn;
struct vn_ioctl_64 *viop;
int unit;
struct vfsioattr ioattr;
struct vn_ioctl_64 user_vnio;
- boolean_t funnel_state;
- struct vfs_context context;
+ struct vfs_context context;
unit = vnunit(dev);
if (vnunit(dev) >= NVNDEVICE) {
- return (ENXIO);
+ return ENXIO;
}
- funnel_state = thread_funnel_set(kernel_flock, TRUE);
vn = vn_table + unit;
error = proc_suser(p);
if (error) {
case DKIOCGETMAXSEGMENTBYTECOUNTREAD:
case DKIOCGETMAXSEGMENTBYTECOUNTWRITE:
case DKIOCGETBLOCKCOUNT:
- case DKIOCGETBLOCKCOUNT32:
if ((vn->sc_flags & VNF_INITED) == 0) {
error = ENXIO;
goto done;
break;
}
- if (vn->sc_vp != NULL)
+ if (vn->sc_vp != NULL) {
vfs_ioattr(vnode_mount(vn->sc_vp), &ioattr);
- else
+ } else {
bzero(&ioattr, sizeof(ioattr));
+ }
switch (cmd) {
case DKIOCISVIRTUAL:
*o = ioattr.io_maxsegwritesize;
break;
case DKIOCGETBLOCKSIZE:
- *f = vn->sc_secsize;
+ *f = vn->sc_secsize;
break;
case DKIOCSETBLOCKSIZE:
if (is_char) {
case DKIOCISWRITABLE:
*f = 1;
break;
- case DKIOCGETBLOCKCOUNT32:
- *f = vn->sc_size;
- break;
case DKIOCGETBLOCKCOUNT:
*o = vn->sc_size;
break;
error = ENOTTY;
break;
}
- done:
- (void) thread_funnel_set(kernel_flock, funnel_state);
- return(error);
+done:
+ return error;
}
-static int
+static int
vnioctl_chr(dev_t dev, u_long cmd, caddr_t data, int flag, proc_t p)
{
- return (vnioctl(dev, cmd, data, flag, p, TRUE));
+ return vnioctl(dev, cmd, data, flag, p, TRUE);
}
-static int
+static int
vnioctl_blk(dev_t dev, u_long cmd, caddr_t data, int flag, proc_t p)
{
- return (vnioctl(dev, cmd, data, flag, p, FALSE));
+ return vnioctl(dev, cmd, data, flag, p, FALSE);
}
/*
static int
vniocattach_file(struct vn_softc *vn,
- struct vn_ioctl_64 *vniop,
- dev_t dev,
- int in_kernel,
- proc_t p)
+ struct vn_ioctl_64 *vniop,
+ dev_t dev,
+ int in_kernel,
+ proc_t p)
{
- dev_t cdev;
+ dev_t cdev;
vfs_context_t ctx = vfs_context_current();
kauth_cred_t cred;
struct nameidata nd;
off_t file_size;
int error, flags;
- flags = FREAD|FWRITE;
+ flags = FREAD | FWRITE;
if (in_kernel) {
- NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, vniop->vn_file, ctx);
- }
- else {
- NDINIT(&nd, LOOKUP, FOLLOW,
- (IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32),
- vniop->vn_file, ctx);
+ NDINIT(&nd, LOOKUP, OP_OPEN, FOLLOW, UIO_SYSSPACE, vniop->vn_file, ctx);
+ } else {
+ NDINIT(&nd, LOOKUP, OP_OPEN, FOLLOW,
+ (IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32),
+ vniop->vn_file, ctx);
}
/* vn_open gives both long- and short-term references */
error = vn_open(&nd, flags, 0);
if (error) {
if (error != EACCES && error != EPERM && error != EROFS) {
- return (error);
+ return error;
}
flags &= ~FWRITE;
if (in_kernel) {
- NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE,
- vniop->vn_file, ctx);
- }
- else {
- NDINIT(&nd, LOOKUP, FOLLOW,
- (IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32),
- vniop->vn_file, ctx);
+ NDINIT(&nd, LOOKUP, OP_OPEN, FOLLOW, UIO_SYSSPACE,
+ vniop->vn_file, ctx);
+ } else {
+ NDINIT(&nd, LOOKUP, OP_OPEN, FOLLOW,
+ (IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32),
+ vniop->vn_file, ctx);
}
error = vn_open(&nd, flags, 0);
if (error) {
- return (error);
+ return error;
}
}
if (nd.ni_vp->v_type != VREG) {
error = EINVAL;
- }
- else {
+ } else {
error = vnode_size(nd.ni_vp, &file_size, ctx);
}
if (error != 0) {
(void) vn_close(nd.ni_vp, flags, ctx);
vnode_put(nd.ni_vp);
- return (error);
+ return error;
}
cred = kauth_cred_proc_ref(p);
nd.ni_vp->v_flag |= VNOCACHE_DATA;
(void)vn_close(nd.ni_vp, flags, ctx);
vnode_put(nd.ni_vp);
kauth_cred_unref(&cred);
- return(error);
+ return error;
}
vn->sc_secsize = DEV_BSIZE;
vn->sc_fsize = file_size;
vn->sc_cred = cred;
cdev = makedev(vndevice_cdev_major, minor(dev));
vn->sc_cdev = devfs_make_node(cdev, DEVFS_CHAR,
- UID_ROOT, GID_OPERATOR,
- 0600, "rvn%d",
- minor(dev));
+ UID_ROOT, GID_OPERATOR,
+ 0600, "rvn%d",
+ minor(dev));
vn->sc_flags |= VNF_INITED;
- if (flags == FREAD)
+ if (flags == FREAD) {
vn->sc_flags |= VNF_READONLY;
+ }
/* lose the short-term reference */
vnode_put(nd.ni_vp);
- return(0);
+ return 0;
}
static int
-vniocattach_shadow(struct vn_softc *vn, struct vn_ioctl_64 *vniop,
- __unused dev_t dev, int in_kernel, proc_t p)
+vniocattach_shadow(struct vn_softc *vn, struct vn_ioctl_64 *vniop,
+ __unused dev_t dev, int in_kernel, proc_t p)
{
vfs_context_t ctx = vfs_context_current();
struct nameidata nd;
int error, flags;
- shadow_map_t * map;
+ shadow_map_t * map;
off_t file_size;
- flags = FREAD|FWRITE;
+ flags = FREAD | FWRITE;
if (in_kernel) {
- NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, vniop->vn_file, ctx);
- }
- else {
- NDINIT(&nd, LOOKUP, FOLLOW,
- (IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32),
- vniop->vn_file, ctx);
+ NDINIT(&nd, LOOKUP, OP_OPEN, FOLLOW, UIO_SYSSPACE, vniop->vn_file, ctx);
+ } else {
+ NDINIT(&nd, LOOKUP, OP_OPEN, FOLLOW,
+ (IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32),
+ vniop->vn_file, ctx);
}
/* vn_open gives both long- and short-term references */
error = vn_open(&nd, flags, 0);
if (error) {
/* shadow MUST be writable! */
- return (error);
+ return error;
}
- if (nd.ni_vp->v_type != VREG
+ if (nd.ni_vp->v_type != VREG
|| (error = vnode_size(nd.ni_vp, &file_size, ctx))) {
(void)vn_close(nd.ni_vp, flags, ctx);
vnode_put(nd.ni_vp);
- return (error ? error : EINVAL);
+ return error ? error : EINVAL;
}
map = shadow_map_create(vn->sc_fsize, file_size,
- 0, vn->sc_secsize);
+ 0, vn->sc_secsize);
if (map == NULL) {
(void)vn_close(nd.ni_vp, flags, ctx);
vnode_put(nd.ni_vp);
vn->sc_shadow_vp = NULL;
- return (ENOMEM);
+ return ENOMEM;
}
vn->sc_shadow_vp = nd.ni_vp;
vn->sc_shadow_vid = vnode_vid(nd.ni_vp);
/* lose the short-term reference */
vnode_put(nd.ni_vp);
- return(0);
+ return 0;
}
int
vndevice_root_image(char * path, char devname[], dev_t * dev_p)
{
- int error = 0;
- struct vn_softc * vn;
- struct vn_ioctl_64 vnio;
+ int error = 0;
+ struct vn_softc * vn;
+ struct vn_ioctl_64 vnio;
vnio.vn_file = CAST_USER_ADDR_T(path);
vnio.vn_size = 0;
vn = vn_table + ROOT_IMAGE_UNIT;
- *dev_p = makedev(vndevice_bdev_major,
- ROOT_IMAGE_UNIT);
+ *dev_p = makedev(vndevice_bdev_major,
+ ROOT_IMAGE_UNIT);
snprintf(devname, 16, "vn%d", ROOT_IMAGE_UNIT);
error = vniocattach_file(vn, &vnio, *dev_p, 1, current_proc());
- return (error);
+ return error;
}
/*
{
char *tmpbuf;
int error = 0;
- struct vfs_context context;
+ struct vfs_context context;
/*
* Horrible kludge to establish credentials for NFS XXX.
tmpbuf = _MALLOC(DEV_BSIZE, M_TEMP, M_WAITOK);
error = file_io(vp, &context, UIO_READ, tmpbuf, 0, DEV_BSIZE, NULL);
FREE(tmpbuf, M_TEMP);
- return (error);
+ return error;
}
void
}
}
-static int
+static int
vnsize(dev_t dev)
{
- int secsize;
+ int secsize;
struct vn_softc *vn;
int unit;
- boolean_t funnel_state;
unit = vnunit(dev);
if (vnunit(dev) >= NVNDEVICE) {
- return (-1);
+ return -1;
}
- funnel_state = thread_funnel_set(kernel_flock, TRUE);
vn = vn_table + unit;
- if ((vn->sc_flags & VNF_INITED) == 0)
+ if ((vn->sc_flags & VNF_INITED) == 0) {
secsize = -1;
- else
+ } else {
secsize = vn->sc_secsize;
- (void) thread_funnel_set(kernel_flock, funnel_state);
- return (secsize);
+ }
+
+ return secsize;
}
-#define CDEV_MAJOR -1
-#define BDEV_MAJOR -1
+#define CDEV_MAJOR -1
+#define BDEV_MAJOR -1
static int vndevice_inited = 0;
-void
+void
vndevice_init(void)
{
- if (vndevice_inited)
+ if (vndevice_inited) {
return;
-
+ }
+
vndevice_do_init();
}
-
-static void
+
+static void
vndevice_do_init( void )
{
- int i;
+ int i;
vndevice_bdev_major = bdevsw_add(BDEV_MAJOR, &vn_bdevsw);
if (vndevice_bdev_major < 0) {
printf("vndevice_init: bdevsw_add() returned %d\n",
- vndevice_bdev_major);
+ vndevice_bdev_major);
return;
}
vndevice_cdev_major = cdevsw_add_with_bdev(CDEV_MAJOR, &vn_cdevsw,
- vndevice_bdev_major);
+ vndevice_bdev_major);
if (vndevice_cdev_major < 0) {
printf("vndevice_init: cdevsw_add() returned %d\n",
- vndevice_cdev_major);
+ vndevice_cdev_major);
return;
}
for (i = 0; i < NVNDEVICE; i++) {
- dev_t dev = makedev(vndevice_bdev_major, i);
+ dev_t dev = makedev(vndevice_bdev_major, i);
vn_table[i].sc_bdev = devfs_make_node(dev, DEVFS_BLOCK,
- UID_ROOT, GID_OPERATOR,
- 0600, "vn%d",
- i);
- if (vn_table[i].sc_bdev == NULL)
+ UID_ROOT, GID_OPERATOR,
+ 0600, "vn%d",
+ i);
+ if (vn_table[i].sc_bdev == NULL) {
printf("vninit: devfs_make_node failed!\n");
+ }
}
}
-static void
-vn_ioctl_to_64(struct vn_ioctl_32 *from, struct vn_ioctl_64 *to)
+static void
+vn_ioctl_to_64(struct vn_ioctl_32 *from, struct vn_ioctl_64 *to)
{
to->vn_file = CAST_USER_ADDR_T(from->vn_file);
to->vn_size = from->vn_size;
projects / apple / xnu.git / blobdiff