* export, as there are no internal consumers.
*/
int
+get_kernel_symfile(__unused proc_t p, __unused char const **symfile);
+int
get_kernel_symfile(__unused proc_t p, __unused char const **symfile)
{
return KERN_FAILURE;
vfs_context_t ctx;
struct vnode * vp;
dev_t device;
+ uint32_t blksize;
+ off_t filelength;
+ char pinned;
};
return (VNOP_IOCTL(p1, theIoctl, result, 0, p2));
}
+static int
+kern_ioctl_file_extents(struct kern_direct_file_io_ref_t * ref, u_long theIoctl, off_t offset, off_t end)
+{
+ int error;
+ int (*do_ioctl)(void * p1, void * p2, u_long theIoctl, caddr_t result);
+ void * p1;
+ void * p2;
+ uint64_t fileblk;
+ size_t filechunk;
+ dk_extent_t extent;
+ dk_unmap_t unmap;
+ _dk_cs_pin_t pin;
+
+ bzero(&extent, sizeof(dk_extent_t));
+ bzero(&unmap, sizeof(dk_unmap_t));
+ bzero(&pin, sizeof(pin));
+ if (ref->vp->v_type == VREG)
+ {
+ p1 = &ref->device;
+ p2 = kernproc;
+ do_ioctl = &file_ioctl;
+ }
+ else
+ {
+ /* Partition. */
+ p1 = ref->vp;
+ p2 = ref->ctx;
+ do_ioctl = &device_ioctl;
+ }
+ while (offset < end)
+ {
+ if (ref->vp->v_type == VREG)
+ {
+ daddr64_t blkno;
+ filechunk = 1*1024*1024*1024;
+ if (filechunk > (size_t)(end - offset))
+ filechunk = (size_t)(end - offset);
+ error = VNOP_BLOCKMAP(ref->vp, offset, filechunk, &blkno,
+ &filechunk, NULL, VNODE_WRITE, NULL);
+ if (error) break;
+ fileblk = blkno * ref->blksize;
+ }
+ else if ((ref->vp->v_type == VBLK) || (ref->vp->v_type == VCHR))
+ {
+ fileblk = offset;
+ filechunk = ref->filelength;
+ }
+
+ if (DKIOCUNMAP == theIoctl)
+ {
+ extent.offset = fileblk;
+ extent.length = filechunk;
+ unmap.extents = &extent;
+ unmap.extentsCount = 1;
+ error = do_ioctl(p1, p2, theIoctl, (caddr_t)&unmap);
+// printf("DKIOCUNMAP(%d) 0x%qx, 0x%qx\n", error, extent.offset, extent.length);
+ }
+ else if (_DKIOCCSPINEXTENT == theIoctl)
+ {
+ pin.cp_extent.offset = fileblk;
+ pin.cp_extent.length = filechunk;
+ pin.cp_flags = _DKIOCCSPINFORHIBERNATION;
+ error = do_ioctl(p1, p2, theIoctl, (caddr_t)&pin);
+ if (error && (ENOTTY != error))
+ {
+ printf("_DKIOCCSPINEXTENT(%d) 0x%qx, 0x%qx\n",
+ error, pin.cp_extent.offset, pin.cp_extent.length);
+ }
+ }
+ else error = EINVAL;
+
+ if (error) break;
+ offset += filechunk;
+ }
+ return (error);
+}
+
+
struct kern_direct_file_io_ref_t *
kern_open_file_for_direct_io(const char * name,
+ boolean_t create_file,
kern_get_file_extents_callback_t callback,
void * callback_ref,
+ off_t set_file_size,
+ off_t write_file_offset,
+ caddr_t write_file_addr,
+ vm_size_t write_file_len,
dev_t * partition_device_result,
dev_t * image_device_result,
uint64_t * partitionbase_result,
uint64_t * maxiocount_result,
- uint32_t * oflags,
- off_t offset,
- caddr_t addr,
- vm_size_t len)
+ uint32_t * oflags)
{
struct kern_direct_file_io_ref_t * ref;
struct vnode_attr va;
int error;
off_t f_offset;
- off_t filelength;
uint64_t fileblk;
size_t filechunk;
uint64_t physoffset;
int isssd = 0;
uint32_t flags = 0;
uint32_t blksize;
- off_t maxiocount, count;
+ off_t maxiocount, count, segcount;
boolean_t locked = FALSE;
int (*do_ioctl)(void * p1, void * p2, u_long theIoctl, caddr_t result);
goto out;
}
- ref->vp = NULL;
+ bzero(ref, sizeof(*ref));
p = kernproc;
ref->ctx = vfs_context_create(vfs_context_current());
- if ((error = vnode_open(name, (O_CREAT | FWRITE), (0), 0, &ref->vp, ref->ctx)))
+ if ((error = vnode_open(name, (create_file) ? (O_CREAT | FWRITE) : FWRITE,
+ (0), 0, &ref->vp, ref->ctx)))
goto out;
- if (addr && len)
+ if (ref->vp->v_type == VREG)
{
- if ((error = kern_write_file(ref, offset, addr, len)))
+ vnode_lock_spin(ref->vp);
+ SET(ref->vp->v_flag, VSWAP);
+ vnode_unlock(ref->vp);
+ }
+
+ if (write_file_addr && write_file_len)
+ {
+ if ((error = kern_write_file(ref, write_file_offset, write_file_addr, write_file_len, 0)))
goto out;
}
VATTR_WANTED(&va, va_rdev);
VATTR_WANTED(&va, va_fsid);
VATTR_WANTED(&va, va_data_size);
+ VATTR_WANTED(&va, va_data_alloc);
VATTR_WANTED(&va, va_nlink);
error = EFAULT;
if (vnode_getattr(ref->vp, &va, ref->ctx))
kprintf("vp va_rdev major %d minor %d\n", major(va.va_rdev), minor(va.va_rdev));
kprintf("vp va_fsid major %d minor %d\n", major(va.va_fsid), minor(va.va_fsid));
- kprintf("vp size %qd\n", va.va_data_size);
+ kprintf("vp size %qd alloc %qd\n", va.va_data_size, va.va_data_alloc);
if (ref->vp->v_type == VREG)
{
- /* Don't dump files with links. */
- if (va.va_nlink != 1)
- goto out;
+ /* Don't dump files with links. */
+ if (va.va_nlink != 1)
+ goto out;
device = va.va_fsid;
+ ref->filelength = va.va_data_size;
+
p1 = &device;
p2 = p;
do_ioctl = &file_ioctl;
+
+ if (set_file_size)
+ {
+ error = vnode_setsize(ref->vp, set_file_size,
+ IO_NOZEROFILL | IO_NOAUTH, ref->ctx);
+ if (error)
+ goto out;
+ ref->filelength = set_file_size;
+ }
}
else if ((ref->vp->v_type == VBLK) || (ref->vp->v_type == VCHR))
{
}
ref->device = device;
- // generate the block list
-
- error = do_ioctl(p1, p2, DKIOCLOCKPHYSICALEXTENTS, NULL);
- if (error)
- goto out;
- locked = TRUE;
-
// get block size
- error = do_ioctl(p1, p2, DKIOCGETBLOCKSIZE, (caddr_t) &blksize);
+ error = do_ioctl(p1, p2, DKIOCGETBLOCKSIZE, (caddr_t) &ref->blksize);
if (error)
goto out;
- if (ref->vp->v_type == VREG)
- filelength = va.va_data_size;
- else
+ if (ref->vp->v_type != VREG)
{
error = do_ioctl(p1, p2, DKIOCGETBLOCKCOUNT, (caddr_t) &fileblk);
if (error)
goto out;
- filelength = fileblk * blksize;
+ ref->filelength = fileblk * ref->blksize;
}
+ // pin logical extents
+
+ error = kern_ioctl_file_extents(ref, _DKIOCCSPINEXTENT, 0, ref->filelength);
+ if (error && (ENOTTY != error)) goto out;
+ ref->pinned = (error == 0);
+
+ // generate the block list
+
+ error = do_ioctl(p1, p2, DKIOCLOCKPHYSICALEXTENTS, NULL);
+ if (error)
+ goto out;
+ locked = TRUE;
+
f_offset = 0;
- while (f_offset < filelength)
+ while (f_offset < ref->filelength)
{
if (ref->vp->v_type == VREG)
{
filechunk = 1*1024*1024*1024;
daddr64_t blkno;
- error = VNOP_BLOCKMAP(ref->vp, f_offset, filechunk, &blkno, &filechunk, NULL, 0, NULL);
+ error = VNOP_BLOCKMAP(ref->vp, f_offset, filechunk, &blkno,
+ &filechunk, NULL, VNODE_WRITE, NULL);
if (error)
goto out;
- fileblk = blkno * blksize;
+ fileblk = blkno * ref->blksize;
}
else if ((ref->vp->v_type == VBLK) || (ref->vp->v_type == VCHR))
{
fileblk = f_offset;
- filechunk = f_offset ? 0 : filelength;
+ filechunk = f_offset ? 0 : ref->filelength;
}
physoffset = 0;
error = ENOTSUP;
goto out;
}
+#if HIBFRAGMENT
+ uint64_t rev;
+ for (rev = 4096; rev <= getphysreq.length; rev += 4096)
+ {
+ callback(callback_ref, getphysreq.offset + getphysreq.length - rev, 4096);
+ }
+#else
callback(callback_ref, getphysreq.offset, getphysreq.length);
+#endif
physoffset += getphysreq.length;
}
f_offset += filechunk;
// get partition base
- error = do_ioctl(p1, p2, DKIOCGETBASE, (caddr_t) partitionbase_result);
- if (error)
- goto out;
+ if (partitionbase_result)
+ {
+ error = do_ioctl(p1, p2, DKIOCGETBASE, (caddr_t) partitionbase_result);
+ if (error)
+ goto out;
+ }
// get block size & constraints
maxiocount = count;
error = do_ioctl(p1, p2, DKIOCGETMAXSEGMENTBYTECOUNTREAD, (caddr_t) &count);
+ if (!error)
+ error = do_ioctl(p1, p2, DKIOCGETMAXSEGMENTCOUNTREAD, (caddr_t) &segcount);
if (error)
- count = 0;
+ count = segcount = 0;
+ count *= segcount;
if (count && (count < maxiocount))
maxiocount = count;
error = do_ioctl(p1, p2, DKIOCGETMAXSEGMENTBYTECOUNTWRITE, (caddr_t) &count);
+ if (!error)
+ error = do_ioctl(p1, p2, DKIOCGETMAXSEGMENTCOUNTWRITE, (caddr_t) &segcount);
if (error)
- count = 0;
+ count = segcount = 0;
+ count *= segcount;
if (count && (count < maxiocount))
maxiocount = count;
*partition_device_result = device;
if (image_device_result)
*image_device_result = target;
- if (flags)
+ if (oflags)
*oflags = flags;
out:
if (error && ref)
{
+ if (ref->pinned)
+ {
+ _dk_cs_pin_t pin;
+ bzero(&pin, sizeof(pin));
+
+ pin.cp_flags = _DKIOCCSPINDISCARDBLACKLIST;
+ p1 = &device;
+ (void) do_ioctl(p1, p2, _DKIOCCSUNPINEXTENT, (caddr_t)&pin);
+ }
if (ref->vp)
{
vnode_close(ref->vp, FWRITE, ref->ctx);
kfree(ref, sizeof(struct kern_direct_file_io_ref_t));
ref = NULL;
}
+
return(ref);
}
int
-kern_write_file(struct kern_direct_file_io_ref_t * ref, off_t offset, caddr_t addr, vm_size_t len)
+kern_write_file(struct kern_direct_file_io_ref_t * ref, off_t offset, caddr_t addr, vm_size_t len, int ioflag)
{
return (vn_rdwr(UIO_WRITE, ref->vp,
addr, len, offset,
- UIO_SYSSPACE, IO_SYNC|IO_NODELOCKED|IO_UNIT,
+ UIO_SYSSPACE, ioflag|IO_SYNC|IO_NODELOCKED|IO_UNIT,
vfs_context_ucred(ref->ctx), (int *) 0,
vfs_context_proc(ref->ctx)));
}
+
void
kern_close_file_for_direct_io(struct kern_direct_file_io_ref_t * ref,
- off_t offset, caddr_t addr, vm_size_t len)
+ off_t write_offset, caddr_t addr, vm_size_t write_length,
+ off_t discard_offset, off_t discard_end)
{
int error;
+ _dk_cs_pin_t pin;
kprintf("kern_close_file_for_direct_io\n");
if (!ref) return;
do_ioctl = &device_ioctl;
}
(void) do_ioctl(p1, p2, DKIOCUNLOCKPHYSICALEXTENTS, NULL);
+
+ if (ref->pinned)
+ {
+ bzero(&pin, sizeof(pin));
+ pin.cp_flags = _DKIOCCSPINDISCARDBLACKLIST;
+ (void) do_ioctl(p1, p2, _DKIOCCSUNPINEXTENT, (caddr_t)&pin);
+ }
+
- if (addr && len)
+ if (discard_offset && discard_end && !ref->pinned)
+ {
+ (void) kern_ioctl_file_extents(ref, DKIOCUNMAP, discard_offset, discard_end);
+ }
+ if (addr && write_length)
{
- (void) kern_write_file(ref, offset, addr, len);
+ (void) kern_write_file(ref, write_offset, addr, write_length, 0);
}
error = vnode_close(ref->vp, FWRITE, ref->ctx);
ref->ctx = NULL;
kfree(ref, sizeof(struct kern_direct_file_io_ref_t));
}
-
projects / apple / xnu.git / blobdiff