#include <sys/stat.h>
#include <sys/disk.h>
#include <sys/conf.h>
+#include <sys/content_protection.h>
#include <mach-o/loader.h>
#include <mach-o/nlist.h>
#include <kern/kalloc.h>
#include <vm/vm_kern.h>
#include <pexpert/pexpert.h>
-#include <IOKit/IOHibernatePrivate.h>
+#include <IOKit/IOPolledInterface.h>
/* This function is called from kern_sysctl in the current process context;
* it is exported with the System6.0.exports, but this appears to be a legacy
* 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;
struct kern_direct_file_io_ref_t
{
- vfs_context_t ctx;
- struct vnode *vp;
+ vfs_context_t ctx;
+ struct vnode * vp;
+ dev_t device;
+ uint32_t blksize;
+ off_t filelength;
+ char cf;
+ char pinned;
};
-static int file_ioctl(void * p1, void * p2, int theIoctl, caddr_t result)
+static int file_ioctl(void * p1, void * p2, u_long theIoctl, caddr_t result)
{
dev_t device = *(dev_t*) p1;
(device, theIoctl, result, S_IFBLK, p2));
}
-static int device_ioctl(void * p1, __unused void * p2, int theIoctl, caddr_t result)
+static int device_ioctl(void * p1, __unused void * p2, u_long theIoctl, caddr_t result)
{
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 = 0;
+ 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;
+ }
+
+ if (_DKIOCCSPINEXTENT == theIoctl) {
+ /* Tell CS the image size, so it knows whether to place the subsequent pins SSD/HDD */
+ pin.cp_extent.length = end;
+ pin.cp_flags = _DKIOCCSHIBERNATEIMGSIZE;
+ (void) do_ioctl(p1, p2, _DKIOCCSPINEXTENT, (caddr_t)&pin);
+ } else if (_DKIOCCSUNPINEXTENT == theIoctl) {
+ /* Tell CS hibernation is done, so it can stop blocking overlapping writes */
+ pin.cp_flags = _DKIOCCSPINDISCARDBLACKLIST;
+ (void) do_ioctl(p1, p2, _DKIOCCSUNPINEXTENT, (caddr_t)&pin);
+ }
+
+ for (; offset < end; offset += filechunk)
+ {
+ 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 | VNODE_BLOCKMAP_NO_TRACK, NULL);
+ if (error) break;
+ if (-1LL == blkno) continue;
+ 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 if (_DKIOCCSUNPINEXTENT == 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("_DKIOCCSUNPINEXTENT(%d) 0x%qx, 0x%qx\n", error, pin.cp_extent.offset, pin.cp_extent.length);
+ }
+ }
+ else error = EINVAL;
+
+ if (error) break;
+ }
+ return (error);
+}
+
+extern uint32_t freespace_mb(vnode_t vp);
+
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,
- dev_t * device_result,
+ off_t set_file_size,
+ off_t fs_free_size,
+ off_t write_file_offset,
+ void * write_file_addr,
+ size_t write_file_len,
+ dev_t * partition_device_result,
+ dev_t * image_device_result,
uint64_t * partitionbase_result,
- uint64_t * maxiocount_result)
+ uint64_t * maxiocount_result,
+ uint32_t * oflags)
{
struct kern_direct_file_io_ref_t * ref;
- proc_t p;
- struct vnode_attr va;
- int error;
- off_t f_offset;
- uint32_t blksize;
- uint64_t size;
- dev_t device;
- off_t maxiocount, count;
-
- int (*do_ioctl)(void * p1, void * p2, int theIoctl, caddr_t result);
- void * p1;
- void * p2;
+ proc_t p;
+ struct vnode_attr va;
+ int error;
+ off_t f_offset;
+ uint64_t fileblk;
+ size_t filechunk;
+ uint64_t physoffset;
+ dev_t device;
+ dev_t target = 0;
+ int isssd = 0;
+ uint32_t flags = 0;
+ uint32_t blksize;
+ off_t maxiocount, count, segcount;
+ boolean_t locked = FALSE;
+ int fmode, cmode;
+ struct nameidata nd;
+ u_int32_t ndflags;
+ off_t mpFree;
+
+ int (*do_ioctl)(void * p1, void * p2, u_long theIoctl, caddr_t result);
+ void * p1 = NULL;
+ void * p2 = NULL;
error = EFAULT;
goto out;
}
- ref->vp = NULL;
- p = current_proc(); // kernproc;
- ref->ctx = vfs_context_create(vfs_context_current());
+ bzero(ref, sizeof(*ref));
+ p = kernproc;
+ ref->ctx = vfs_context_kernel();
- if ((error = vnode_open(name, (O_CREAT | FWRITE), (0), 0, &ref->vp, ref->ctx)))
- goto out;
+ fmode = (create_file) ? (O_CREAT | FWRITE) : FWRITE;
+ cmode = S_IRUSR | S_IWUSR;
+ ndflags = NOFOLLOW;
+ NDINIT(&nd, LOOKUP, OP_OPEN, ndflags, UIO_SYSSPACE, CAST_USER_ADDR_T(name), ref->ctx);
+ VATTR_INIT(&va);
+ VATTR_SET(&va, va_mode, cmode);
+ VATTR_SET(&va, va_dataprotect_flags, VA_DP_RAWENCRYPTED);
+ VATTR_SET(&va, va_dataprotect_class, PROTECTION_CLASS_D);
+ if ((error = vn_open_auth(&nd, &fmode, &va))) {
+ kprintf("vn_open_auth(fmode: %d, cmode: %d) failed with error: %d\n", fmode, cmode, error);
+ goto out;
+ }
+
+ ref->vp = nd.ni_vp;
+ if (ref->vp->v_type == VREG)
+ {
+ 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, IO_SKIP_ENCRYPTION))) {
+ kprintf("kern_write_file() failed with error: %d\n", error);
+ goto out;
+ }
+ }
VATTR_INIT(&va);
VATTR_WANTED(&va, va_rdev);
VATTR_WANTED(&va, va_fsid);
+ VATTR_WANTED(&va, va_devid);
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))
- goto out;
+ if (vnode_getattr(ref->vp, &va, ref->ctx)) goto out;
- 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);
+ mpFree = freespace_mb(ref->vp);
+ mpFree <<= 20;
+ kprintf("kern_direct_file(%s): vp size %qd, alloc %qd, mp free %qd, keep free %qd\n",
+ name, va.va_data_size, va.va_data_alloc, mpFree, fs_free_size);
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 = (VATTR_IS_SUPPORTED(&va, va_devid)) ? va.va_devid : va.va_fsid;
+ ref->filelength = va.va_data_size;
- device = va.va_fsid;
p1 = &device;
p2 = p;
do_ioctl = &file_ioctl;
+
+ if (set_file_size)
+ {
+ if (fs_free_size)
+ {
+ mpFree += va.va_data_alloc;
+ if ((mpFree < set_file_size) || ((mpFree - set_file_size) < fs_free_size))
+ {
+ error = ENOSPC;
+ goto out;
+ }
+ }
+ 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))
{
else
{
/* Don't dump to non-regular files. */
- error = EFAULT;
+ error = EFAULT;
goto out;
}
+ ref->device = device;
- // get partition base
+ // probe for CF
+ dk_corestorage_info_t cs_info;
+ memset(&cs_info, 0, sizeof(dk_corestorage_info_t));
+ error = do_ioctl(p1, p2, DKIOCCORESTORAGE, (caddr_t)&cs_info);
+ ref->cf = (error == 0) && (cs_info.flags & DK_CORESTORAGE_ENABLE_HOTFILES);
- error = do_ioctl(p1, p2, DKIOCGETBASE, (caddr_t) partitionbase_result);
+ // get block size
+
+ error = do_ioctl(p1, p2, DKIOCGETBLOCKSIZE, (caddr_t) &ref->blksize);
if (error)
goto out;
+ if (ref->vp->v_type != VREG)
+ {
+ error = do_ioctl(p1, p2, DKIOCGETBLOCKCOUNT, (caddr_t) &fileblk);
+ if (error) goto out;
+ 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;
+ for (; f_offset < ref->filelength; f_offset += filechunk)
+ {
+ 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, VNODE_WRITE | VNODE_BLOCKMAP_NO_TRACK, NULL);
+ if (error) goto out;
+ if (-1LL == blkno) continue;
+ fileblk = blkno * ref->blksize;
+ }
+ else if ((ref->vp->v_type == VBLK) || (ref->vp->v_type == VCHR))
+ {
+ fileblk = f_offset;
+ filechunk = f_offset ? 0 : ref->filelength;
+ }
+
+ physoffset = 0;
+ while (physoffset < filechunk)
+ {
+ dk_physical_extent_t getphysreq;
+ bzero(&getphysreq, sizeof(getphysreq));
+
+ getphysreq.offset = fileblk + physoffset;
+ getphysreq.length = (filechunk - physoffset);
+ error = do_ioctl(p1, p2, DKIOCGETPHYSICALEXTENT, (caddr_t) &getphysreq);
+ if (error) goto out;
+ if (!target)
+ {
+ target = getphysreq.dev;
+ }
+ else if (target != getphysreq.dev)
+ {
+ 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;
+ }
+ }
+ callback(callback_ref, 0ULL, 0ULL);
+
+ if (ref->vp->v_type == VREG) p1 = ⌖
+ else
+ {
+ p1 = ⌖
+ p2 = p;
+ do_ioctl = &file_ioctl;
+ }
+
+ // get partition base
+
+ if (partitionbase_result)
+ {
+ error = do_ioctl(p1, p2, DKIOCGETBASE, (caddr_t) partitionbase_result);
+ if (error)
+ goto out;
+ }
+
// get block size & constraints
error = do_ioctl(p1, p2, DKIOCGETBLOCKSIZE, (caddr_t) &blksize);
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;
if (maxiocount_result)
*maxiocount_result = maxiocount;
- // generate the block list
+ error = do_ioctl(p1, p2, DKIOCISSOLIDSTATE, (caddr_t)&isssd);
+ if (!error && isssd)
+ flags |= kIOPolledFileSSD;
- error = 0;
- if (ref->vp->v_type == VREG)
- {
- f_offset = 0;
- while(f_offset < (off_t) va.va_data_size)
- {
- size_t io_size = 1*1024*1024*1024;
- daddr64_t blkno;
+ if (partition_device_result)
+ *partition_device_result = device;
+ if (image_device_result)
+ *image_device_result = target;
+ if (oflags)
+ *oflags = flags;
- error = VNOP_BLOCKMAP(ref->vp, f_offset, io_size, &blkno, (size_t *)&io_size, NULL, 0, NULL);
- if (error)
- goto out;
- callback(callback_ref, ((uint64_t) blkno) * blksize, (uint64_t) io_size);
- f_offset += io_size;
- }
- callback(callback_ref, 0ULL, 0ULL);
- }
- else if ((ref->vp->v_type == VBLK) || (ref->vp->v_type == VCHR))
+ if ((ref->vp->v_type == VBLK) || (ref->vp->v_type == VCHR))
{
- error = do_ioctl(p1, p2, DKIOCGETBLOCKCOUNT, (caddr_t) &size);
- if (error)
- goto out;
- size *= blksize;
- callback(callback_ref, 0ULL, size);
- callback(callback_ref, size, 0ULL);
+ vnode_close(ref->vp, FWRITE, ref->ctx);
+ ref->vp = NULLVP;
+ ref->ctx = NULL;
}
- if (device_result)
- *device_result = device;
-
out:
- kprintf("kern_open_file_for_direct_io(%d)\n", error);
+ printf("kern_open_file_for_direct_io(%p, %d)\n", ref, error);
+
- if (error && ref) {
- if (ref->vp) {
+ if (error && locked)
+ {
+ p1 = &device;
+ (void) do_ioctl(p1, p2, DKIOCUNLOCKPHYSICALEXTENTS, NULL);
+ }
+
+ if (error && ref)
+ {
+ if (ref->vp)
+ {
+ (void) kern_ioctl_file_extents(ref, _DKIOCCSUNPINEXTENT, 0, (ref->pinned && ref->cf) ? ref->filelength : 0);
vnode_close(ref->vp, FWRITE, ref->ctx);
ref->vp = NULLVP;
}
-
- vfs_context_rele(ref->ctx);
+ ref->ctx = NULL;
kfree(ref, sizeof(struct kern_direct_file_io_ref_t));
ref = NULL;
}
}
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, void * addr, 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)));
+}
+
+int
+kern_read_file(struct kern_direct_file_io_ref_t * ref, off_t offset, void * addr, size_t len, int ioflag)
+{
+ return (vn_rdwr(UIO_READ, ref->vp,
+ addr, len, offset,
+ UIO_SYSSPACE, ioflag|IO_SYNC|IO_NODELOCKED|IO_UNIT,
vfs_context_ucred(ref->ctx), (int *) 0,
vfs_context_proc(ref->ctx)));
}
+
+struct mount *
+kern_file_mount(struct kern_direct_file_io_ref_t * ref)
+{
+ return (ref->vp->v_mount);
+}
+
void
-kern_close_file_for_direct_io(struct kern_direct_file_io_ref_t * ref)
+kern_close_file_for_direct_io(struct kern_direct_file_io_ref_t * ref,
+ off_t write_offset, void * addr, size_t write_length,
+ off_t discard_offset, off_t discard_end)
{
- kprintf("kern_close_file_for_direct_io\n");
+ int error;
+ printf("kern_close_file_for_direct_io(%p)\n", ref);
- if (ref) {
- int error;
+ if (!ref) return;
+
+ if (ref->vp)
+ {
+ int (*do_ioctl)(void * p1, void * p2, u_long theIoctl, caddr_t result);
+ void * p1;
+ void * p2;
+
+ 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;
+ }
+ (void) do_ioctl(p1, p2, DKIOCUNLOCKPHYSICALEXTENTS, NULL);
+
+ //XXX If unmapping extents then don't also need to unpin; except ...
+ //XXX if file unaligned (HFS 4k / Fusion 128k) then pin is superset and
+ //XXX unmap is subset, so save extra walk over file extents (and the risk
+ //XXX that CF drain starts) vs leaving partial units pinned to SSD
+ //XXX (until whatever was sharing also unmaps). Err on cleaning up fully.
+ boolean_t will_unmap = (!ref->pinned || ref->cf) && (discard_end > discard_offset);
+ boolean_t will_unpin = (ref->pinned && ref->cf /* && !will_unmap */);
+
+ (void) kern_ioctl_file_extents(ref, _DKIOCCSUNPINEXTENT, 0, (will_unpin) ? ref->filelength : 0);
+
+ if (will_unmap)
+ {
+ (void) kern_ioctl_file_extents(ref, DKIOCUNMAP, discard_offset, (ref->cf) ? ref->filelength : discard_end);
+ }
+
+ if (addr && write_length)
+ {
+ (void) kern_write_file(ref, write_offset, addr, write_length, IO_SKIP_ENCRYPTION);
+ }
+
+ error = vnode_close(ref->vp, FWRITE, ref->ctx);
+
+ ref->vp = NULLVP;
+ kprintf("vnode_close(%d)\n", error);
- if (ref->vp) {
- error = vnode_close(ref->vp, FWRITE, ref->ctx);
- ref->vp = NULLVP;
- kprintf("vnode_close(%d)\n", error);
- }
- vfs_context_rele(ref->ctx);
- ref->ctx = NULL;
- kfree(ref, sizeof(struct kern_direct_file_io_ref_t));
}
-}
+ ref->ctx = NULL;
+
+ kfree(ref, sizeof(struct kern_direct_file_io_ref_t));
+}
projects / apple / xnu.git / blobdiff