1 /* 2 * Copyright (c) 1999-2007 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 /* 29 * Header file for Unified Buffer Cache. 30 * 31 */ 32 33 #ifndef _SYS_UBC_H_ 34 #define _SYS_UBC_H_ 35 36 #include <sys/appleapiopts.h> 37 #include <sys/cdefs.h> 38 #include <sys/kernel_types.h> 39 #include <kern/locks.h> 40 #include <mach/machine.h> 41 #include <mach/memory_object_types.h> 42 #include <sys/ucred.h> 43 44 #ifdef KERNEL_PRIVATE 45 #include <sys/imgact.h> 46 #endif // KERNEL_PRIVATE 47 48 /* defns for ubc_msync() and ubc_msync */ 49 50 #define UBC_PUSHDIRTY 0x01 /* clean any dirty pages in the specified range to the backing store */ 51 #define UBC_PUSHALL 0x02 /* push both dirty and precious pages to the backing store */ 52 #define UBC_INVALIDATE 0x04 /* invalidate pages in the specified range... may be used with UBC_PUSHDIRTY/ALL */ 53 #define UBC_SYNC 0x08 /* wait for I/Os generated by UBC_PUSHDIRTY to complete */ 54 55 __BEGIN_DECLS 56 57 off_t ubc_blktooff(struct vnode *, daddr64_t); 58 daddr64_t ubc_offtoblk(struct vnode *, off_t); 59 off_t ubc_getsize(struct vnode *); 60 int ubc_setsize(struct vnode *, off_t); 61 62 #ifdef KERNEL_PRIVATE 63 64 enum { 65 UBC_SETSIZE_NO_FS_REENTRY = 1 66 }; 67 typedef uint32_t ubc_setsize_opts_t; 68 69 errno_t ubc_setsize_ex(vnode_t vp, off_t nsize, ubc_setsize_opts_t opts); 70 71 #endif // KERNEL_PRIVATE 72 73 kauth_cred_t ubc_getcred(struct vnode *); 74 struct thread; 75 int ubc_setthreadcred(struct vnode *, struct proc *, struct thread *); 76 77 errno_t ubc_msync(vnode_t, off_t, off_t, off_t *, int); 78 int ubc_pages_resident(vnode_t); 79 int ubc_page_op(vnode_t, off_t, int, ppnum_t *, int *); 80 int ubc_range_op(vnode_t, off_t, off_t, int, int *); 81 82 #ifdef KERNEL_PRIVATE 83 int ubc_setcred(struct vnode *, struct ucred *); 84 85 /* code signing */ 86 struct cs_blob; 87 struct cs_blob *ubc_cs_blob_get(vnode_t, cpu_type_t, cpu_subtype_t, off_t); 88 struct cs_blob *ubc_cs_blob_get_supplement(vnode_t, off_t); 89 90 /* apis to handle generation count for cs blob */ 91 void cs_blob_reset_cache(void); 92 int ubc_cs_blob_revalidate(vnode_t, struct cs_blob *, struct image_params *, int, uint32_t); 93 int ubc_cs_generation_check(vnode_t); 94 95 int cs_entitlements_blob_get(proc_t, void **, size_t *); 96 int cs_blob_get(proc_t, void **, size_t *); 97 const char *cs_identity_get(proc_t); 98 99 void ubc_cs_free_and_vnode_unlock(struct vnode *); 100 101 int UBCINFOEXISTS(const struct vnode *); 102 103 #endif 104 105 /* cluster IO routines */ 106 void cluster_update_state(vnode_t, vm_object_offset_t, vm_object_offset_t, boolean_t); 107 108 int advisory_read(vnode_t, off_t, off_t, int); 109 int advisory_read_ext(vnode_t, off_t, off_t, int, int (*)(buf_t, void *), void *, int); 110 111 int cluster_read(vnode_t, struct uio *, off_t, int); 112 int cluster_read_ext(vnode_t, struct uio *, off_t, int, int (*)(buf_t, void *), void *); 113 114 int cluster_write(vnode_t, struct uio *, off_t, off_t, off_t, off_t, int); 115 int cluster_write_ext(vnode_t, struct uio *, off_t, off_t, off_t, off_t, int, int (*)(buf_t, void *), void *); 116 117 int cluster_pageout(vnode_t, upl_t, upl_offset_t, off_t, int, off_t, int); 118 int cluster_pageout_ext(vnode_t, upl_t, upl_offset_t, off_t, int, off_t, int, int (*)(buf_t, void *), void *); 119 120 int cluster_pagein(vnode_t, upl_t, upl_offset_t, off_t, int, off_t, int); 121 int cluster_pagein_ext(vnode_t, upl_t, upl_offset_t, off_t, int, off_t, int, int (*)(buf_t, void *), void *); 122 123 int cluster_push(vnode_t, int); 124 int cluster_push_ext(vnode_t, int, int (*)(buf_t, void *), void *); 125 int cluster_push_err(vnode_t, int, int (*)(buf_t, void *), void *, int *); 126 127 int cluster_bp(buf_t); 128 int cluster_bp_ext(buf_t, int (*)(buf_t, void *), void *); 129 130 void cluster_zero(upl_t, upl_offset_t, int, buf_t); 131 132 int cluster_copy_upl_data(uio_t, upl_t, int, int *); 133 int cluster_copy_ubc_data(vnode_t, uio_t, int *, int); 134 135 typedef struct cl_direct_read_lock cl_direct_read_lock_t; 136 cl_direct_read_lock_t *cluster_lock_direct_read(vnode_t vp, lck_rw_type_t exclusive); 137 void cluster_unlock_direct_read(cl_direct_read_lock_t *lck); 138 139 /* UPL routines */ 140 #ifndef XNU_KERNEL_PRIVATE 141 int ubc_create_upl(vnode_t, off_t, int, upl_t *, upl_page_info_t **, int); 142 #endif /* XNU_KERNEL_PRIVATE */ 143 int ubc_upl_map(upl_t, vm_offset_t *); 144 int ubc_upl_unmap(upl_t); 145 int ubc_upl_map_range(upl_t, vm_offset_t, vm_size_t, vm_prot_t, vm_offset_t *); 146 int ubc_upl_unmap_range(upl_t, vm_offset_t, vm_size_t); 147 int ubc_upl_commit(upl_t); 148 int ubc_upl_commit_range(upl_t, upl_offset_t, upl_size_t, int); 149 int ubc_upl_abort(upl_t, int); 150 int ubc_upl_abort_range(upl_t, upl_offset_t, upl_size_t, int); 151 void ubc_upl_range_needed(upl_t, int, int); 152 153 upl_page_info_t *ubc_upl_pageinfo(upl_t); 154 upl_size_t ubc_upl_maxbufsize(void); 155 156 int is_file_clean(vnode_t, off_t); 157 158 errno_t mach_to_bsd_errno(kern_return_t mach_err); 159 160 #ifdef KERNEL_PRIVATE 161 162 int ubc_create_upl_external(vnode_t, off_t, int, upl_t *, upl_page_info_t **, int); 163 #ifdef XNU_KERNEL_PRIVATE 164 int ubc_create_upl_kernel(vnode_t, off_t, int, upl_t *, upl_page_info_t **, int, vm_tag_t); 165 #endif /* XNU_KERNEL_PRIVATE */ 166 167 boolean_t ubc_is_mapped(const struct vnode *, boolean_t *writable); 168 __attribute__((pure)) boolean_t ubc_is_mapped_writable(const struct vnode *); 169 boolean_t ubc_was_mapped(const struct vnode *, boolean_t *writable); 170 __attribute__((pure)) boolean_t ubc_was_mapped_writable(const struct vnode *); 171 172 uint32_t cluster_max_io_size(mount_t, int); 173 174 #endif 175 176 __END_DECLS 177 178 #endif /* _SYS_UBC_H_ */ 179