void kern_close_file_for_direct_io(struct kern_direct_file_io_ref_t * ref, off_t write_offset, caddr_t addr, vm_size_t write_length, off_t discard_offset, off_t discard_end) { int error; kprintf("kern_close_file_for_direct_io\n"); 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); if (addr && write_length) { (void) kern_write_file(ref, write_offset, addr, write_length); } if (discard_offset && discard_end && !ref->pinned) { (void) kern_ioctl_file_extents(ref, DKIOCUNMAP, discard_offset, discard_end); } 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)); }
void 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) { int error; printf("kern_close_file_for_direct_io(%p)\n", ref); if (!ref) return; if (ref->vp) { int (*do_ioctl)(void * p1, void * p2, u_long theIoctl, caddr_t result); void * p1; void * p2; discard_offset = ((discard_offset + ref->blksize - 1) & ~(((off_t) ref->blksize) - 1)); discard_end = ((discard_end) & ~(((off_t) ref->blksize) - 1)); 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 (ref->frozen) { (void) VNOP_IOCTL(ref->vp, FSCTL_THAW_EXTENTS, NULL, 0, ref->ctx); } if (ref->wbcranged) { (void) do_ioctl(p1, p2, DKIOCAPFSRELEASEWBCRANGE, (caddr_t) NULL); } 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); } ref->ctx = NULL; kfree(ref, sizeof(struct kern_direct_file_io_ref_t)); }
struct kern_direct_file_io_ref_t * kern_open_file_for_direct_io(const char * name, kern_get_file_extents_callback_t callback, void * callback_ref, 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) { struct kern_direct_file_io_ref_t * ref; 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; boolean_t locked = FALSE; int (*do_ioctl)(void * p1, void * p2, u_long theIoctl, caddr_t result); void * p1 = NULL; void * p2 = NULL; error = EFAULT; ref = (struct kern_direct_file_io_ref_t *) kalloc(sizeof(struct kern_direct_file_io_ref_t)); if (!ref) { error = EFAULT; goto out; } 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))) goto out; if (addr && len) { if ((error = kern_write_file(ref, offset, addr, len))) goto out; } VATTR_INIT(&va); VATTR_WANTED(&va, va_rdev); VATTR_WANTED(&va, va_fsid); VATTR_WANTED(&va, va_data_size); VATTR_WANTED(&va, va_nlink); error = EFAULT; 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); if (ref->vp->v_type == VREG) { /* Don't dump files with links. */ if (va.va_nlink != 1) goto out; device = va.va_fsid; p1 = &device; p2 = p; do_ioctl = &file_ioctl; } else if ((ref->vp->v_type == VBLK) || (ref->vp->v_type == VCHR)) { /* Partition. */ device = va.va_rdev; p1 = ref->vp; p2 = ref->ctx; do_ioctl = &device_ioctl; } else { /* Don't dump to non-regular files. */ error = EFAULT; goto out; } ref->device = device; // get block size error = do_ioctl(p1, p2, DKIOCGETBLOCKSIZE, (caddr_t) &ref->blksize); if (error) goto out; if (ref->vp->v_type == VREG) ref->filelength = va.va_data_size; else { 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; 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); if (error) goto out; 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; } callback(callback_ref, getphysreq.offset, getphysreq.length); physoffset += getphysreq.length; } f_offset += filechunk; } callback(callback_ref, 0ULL, 0ULL); if (ref->vp->v_type == VREG) p1 = ⌖ // get partition base 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); if (error) goto out; maxiocount = 1*1024*1024*1024; error = do_ioctl(p1, p2, DKIOCGETMAXBLOCKCOUNTREAD, (caddr_t) &count); if (error) count = 0; count *= blksize; if (count && (count < maxiocount)) maxiocount = count; error = do_ioctl(p1, p2, DKIOCGETMAXBLOCKCOUNTWRITE, (caddr_t) &count); if (error) count = 0; count *= blksize; if (count && (count < maxiocount)) maxiocount = count; error = do_ioctl(p1, p2, DKIOCGETMAXBYTECOUNTREAD, (caddr_t) &count); if (error) count = 0; if (count && (count < maxiocount)) maxiocount = count; error = do_ioctl(p1, p2, DKIOCGETMAXBYTECOUNTWRITE, (caddr_t) &count); if (error) count = 0; if (count && (count < maxiocount)) maxiocount = count; error = do_ioctl(p1, p2, DKIOCGETMAXSEGMENTBYTECOUNTREAD, (caddr_t) &count); if (error) count = 0; if (count && (count < maxiocount)) maxiocount = count; error = do_ioctl(p1, p2, DKIOCGETMAXSEGMENTBYTECOUNTWRITE, (caddr_t) &count); if (error) count = 0; if (count && (count < maxiocount)) maxiocount = count; kprintf("max io 0x%qx bytes\n", maxiocount); if (maxiocount_result) *maxiocount_result = maxiocount; error = do_ioctl(p1, p2, DKIOCISSOLIDSTATE, (caddr_t)&isssd); if (!error && isssd) flags |= kIOHibernateOptionSSD; if (partition_device_result) *partition_device_result = device; if (image_device_result) *image_device_result = target; if (flags) *oflags = flags; out: kprintf("kern_open_file_for_direct_io(%d)\n", error); if (error && locked) { p1 = &device; (void) do_ioctl(p1, p2, DKIOCUNLOCKPHYSICALEXTENTS, NULL); } if (error && ref) { if (ref->vp) { vnode_close(ref->vp, FWRITE, ref->ctx); ref->vp = NULLVP; } vfs_context_rele(ref->ctx); kfree(ref, sizeof(struct kern_direct_file_io_ref_t)); ref = NULL; } return(ref); }
struct kern_direct_file_io_ref_t * kern_open_file_for_direct_io(const char * name, uint32_t iflags, kern_get_file_extents_callback_t callback, void * callback_ref, 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, uint32_t * oflags) { struct kern_direct_file_io_ref_t * ref; proc_t p; struct vnode_attr va; dk_apfs_wbc_range_t wbc_range; int error; off_t f_offset; uint64_t fileblk; size_t filechunk; uint64_t physoffset, minoffset; dev_t device; dev_t target = 0; int isssd = 0; uint32_t flags = 0; uint32_t blksize; off_t maxiocount, count, segcount, wbctotal; 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; ref = (struct kern_direct_file_io_ref_t *) kalloc(sizeof(struct kern_direct_file_io_ref_t)); if (!ref) { error = EFAULT; goto out; } bzero(ref, sizeof(*ref)); p = kernproc; ref->ctx = vfs_context_kernel(); fmode = (kIOPolledFileCreate & iflags) ? (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; wbctotal = 0; 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; device = (VATTR_IS_SUPPORTED(&va, va_devid)) ? va.va_devid : va.va_fsid; ref->filelength = va.va_data_size; p1 = &device; p2 = p; do_ioctl = &file_ioctl; if (kIOPolledFileHibernate & iflags) { error = do_ioctl(p1, p2, DKIOCAPFSGETWBCRANGE, (caddr_t) &wbc_range); ref->wbcranged = (error == 0); } if (ref->wbcranged) { uint32_t idx; assert(wbc_range.count <= (sizeof(wbc_range.extents) / sizeof(wbc_range.extents[0]))); for (idx = 0; idx < wbc_range.count; idx++) wbctotal += wbc_range.extents[idx].length; kprintf("kern_direct_file(%s): wbc %qd\n", name, wbctotal); if (wbctotal) target = wbc_range.dev; } if (set_file_size) { if (wbctotal) { if (wbctotal >= set_file_size) set_file_size = HIBERNATE_MIN_FILE_SIZE; else { set_file_size -= wbctotal; if (set_file_size < HIBERNATE_MIN_FILE_SIZE) set_file_size = HIBERNATE_MIN_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)) { /* Partition. */ device = va.va_rdev; p1 = ref->vp; p2 = ref->ctx; do_ioctl = &device_ioctl; } else { /* Don't dump to non-regular files. */ error = EFAULT; goto out; } ref->device = device; // 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); // get block size error = do_ioctl(p1, p2, DKIOCGETBLOCKSIZE, (caddr_t) &ref->blksize); if (error) goto out; minoffset = HIBERNATE_MIN_PHYSICAL_LBA * ref->blksize; 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, CS version error = kern_ioctl_file_extents(ref, _DKIOCCSPINEXTENT, 0, ref->filelength); if (error && (ENOTTY != error)) goto out; ref->pinned = (error == 0); // pin logical extents, apfs version error = VNOP_IOCTL(ref->vp, FSCTL_FREEZE_EXTENTS, NULL, 0, ref->ctx); if (error && (ENOTTY != error)) goto out; ref->frozen = (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; } assert(getphysreq.offset >= minoffset); #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; } } if (ref->wbcranged) { uint32_t idx; for (idx = 0; idx < wbc_range.count; idx++) { assert(wbc_range.extents[idx].offset >= minoffset); callback(callback_ref, wbc_range.extents[idx].offset, wbc_range.extents[idx].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); if (error) goto out; maxiocount = 1*1024*1024*1024; error = do_ioctl(p1, p2, DKIOCGETMAXBLOCKCOUNTREAD, (caddr_t) &count); if (error) count = 0; count *= blksize; if (count && (count < maxiocount)) maxiocount = count; error = do_ioctl(p1, p2, DKIOCGETMAXBLOCKCOUNTWRITE, (caddr_t) &count); if (error) count = 0; count *= blksize; if (count && (count < maxiocount)) maxiocount = count; error = do_ioctl(p1, p2, DKIOCGETMAXBYTECOUNTREAD, (caddr_t) &count); if (error) count = 0; if (count && (count < maxiocount)) maxiocount = count; error = do_ioctl(p1, p2, DKIOCGETMAXBYTECOUNTWRITE, (caddr_t) &count); if (error) count = 0; if (count && (count < maxiocount)) 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 = 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 = segcount = 0; count *= segcount; if (count && (count < maxiocount)) maxiocount = count; kprintf("max io 0x%qx bytes\n", maxiocount); if (maxiocount_result) *maxiocount_result = maxiocount; error = do_ioctl(p1, p2, DKIOCISSOLIDSTATE, (caddr_t)&isssd); if (!error && isssd) flags |= kIOPolledFileSSD; if (partition_device_result) *partition_device_result = device; if (image_device_result) *image_device_result = target; if (oflags) *oflags = flags; if ((ref->vp->v_type == VBLK) || (ref->vp->v_type == VCHR)) { vnode_close(ref->vp, FWRITE, ref->ctx); ref->vp = NULLVP; ref->ctx = NULL; } out: printf("kern_open_file_for_direct_io(%p, %d)\n", ref, error); 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); if (ref->frozen) { (void) VNOP_IOCTL(ref->vp, FSCTL_THAW_EXTENTS, NULL, 0, ref->ctx); } if (ref->wbcranged) { (void) do_ioctl(p1, p2, DKIOCAPFSRELEASEWBCRANGE, (caddr_t) NULL); } vnode_close(ref->vp, FWRITE, ref->ctx); ref->vp = NULLVP; } ref->ctx = NULL; kfree(ref, sizeof(struct kern_direct_file_io_ref_t)); ref = NULL; } return(ref); }