efifile.c revision 1.3.2.2
1 1.3.2.2 pgoyette /* $NetBSD: efifile.c,v 1.3.2.2 2018/09/06 06:56:47 pgoyette Exp $ */ 2 1.3.2.2 pgoyette 3 1.3.2.2 pgoyette /*- 4 1.3.2.2 pgoyette * Copyright (c) 2018 Jared McNeill <jmcneill (at) invisible.ca> 5 1.3.2.2 pgoyette * All rights reserved. 6 1.3.2.2 pgoyette * 7 1.3.2.2 pgoyette * Redistribution and use in source and binary forms, with or without 8 1.3.2.2 pgoyette * modification, are permitted provided that the following conditions 9 1.3.2.2 pgoyette * are met: 10 1.3.2.2 pgoyette * 1. Redistributions of source code must retain the above copyright 11 1.3.2.2 pgoyette * notice, this list of conditions and the following disclaimer. 12 1.3.2.2 pgoyette * 2. Redistributions in binary form must reproduce the above copyright 13 1.3.2.2 pgoyette * notice, this list of conditions and the following disclaimer in the 14 1.3.2.2 pgoyette * documentation and/or other materials provided with the distribution. 15 1.3.2.2 pgoyette * 16 1.3.2.2 pgoyette * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17 1.3.2.2 pgoyette * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 1.3.2.2 pgoyette * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 1.3.2.2 pgoyette * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20 1.3.2.2 pgoyette * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 1.3.2.2 pgoyette * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 1.3.2.2 pgoyette * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 1.3.2.2 pgoyette * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 1.3.2.2 pgoyette * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.3.2.2 pgoyette * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.3.2.2 pgoyette * SUCH DAMAGE. 27 1.3.2.2 pgoyette */ 28 1.3.2.2 pgoyette 29 1.3.2.2 pgoyette #include <sys/param.h> 30 1.3.2.2 pgoyette 31 1.3.2.2 pgoyette #include "efiboot.h" 32 1.3.2.2 pgoyette #include "efifile.h" 33 1.3.2.2 pgoyette 34 1.3.2.2 pgoyette static EFI_HANDLE *efi_vol; 35 1.3.2.2 pgoyette static UINTN efi_nvol; 36 1.3.2.2 pgoyette 37 1.3.2.2 pgoyette static int 38 1.3.2.2 pgoyette efi_file_parse(const char *fname, UINTN *pvol, const char **pfile) 39 1.3.2.2 pgoyette { 40 1.3.2.2 pgoyette intmax_t vol; 41 1.3.2.2 pgoyette char *ep = NULL; 42 1.3.2.2 pgoyette 43 1.3.2.2 pgoyette if (strchr(fname, ':') != NULL) { 44 1.3.2.2 pgoyette if (strncasecmp(fname, "fs", 2) != 0) 45 1.3.2.2 pgoyette return EINVAL; 46 1.3.2.2 pgoyette vol = strtoimax(fname + 2, &ep, 10); 47 1.3.2.2 pgoyette if (vol < 0 || vol >= efi_nvol || *ep != ':') 48 1.3.2.2 pgoyette return ENXIO; 49 1.3.2.2 pgoyette *pvol = vol; 50 1.3.2.2 pgoyette *pfile = ep + 1; 51 1.3.2.2 pgoyette return 0; 52 1.3.2.2 pgoyette } 53 1.3.2.2 pgoyette 54 1.3.2.2 pgoyette return EINVAL; 55 1.3.2.2 pgoyette } 56 1.3.2.2 pgoyette 57 1.3.2.2 pgoyette void 58 1.3.2.2 pgoyette efi_file_system_probe(void) 59 1.3.2.2 pgoyette { 60 1.3.2.2 pgoyette EFI_STATUS status; 61 1.3.2.2 pgoyette 62 1.3.2.2 pgoyette status = LibLocateHandle(ByProtocol, &FileSystemProtocol, NULL, &efi_nvol, &efi_vol); 63 1.3.2.2 pgoyette if (EFI_ERROR(status)) 64 1.3.2.2 pgoyette return; 65 1.3.2.2 pgoyette } 66 1.3.2.2 pgoyette 67 1.3.2.2 pgoyette int 68 1.3.2.2 pgoyette efi_file_open(struct open_file *f, ...) 69 1.3.2.2 pgoyette { 70 1.3.2.2 pgoyette EFI_DEVICE_PATH *dp; 71 1.3.2.2 pgoyette SIMPLE_READ_FILE srf; 72 1.3.2.2 pgoyette EFI_HANDLE device, file; 73 1.3.2.2 pgoyette EFI_STATUS status; 74 1.3.2.2 pgoyette UINTN vol; 75 1.3.2.2 pgoyette const char *fname, *path; 76 1.3.2.2 pgoyette CHAR16 *upath; 77 1.3.2.2 pgoyette va_list ap; 78 1.3.2.2 pgoyette size_t len; 79 1.3.2.2 pgoyette int rv, n; 80 1.3.2.2 pgoyette 81 1.3.2.2 pgoyette va_start(ap, f); 82 1.3.2.2 pgoyette fname = va_arg(ap, const char *); 83 1.3.2.2 pgoyette va_end(ap); 84 1.3.2.2 pgoyette 85 1.3.2.2 pgoyette rv = efi_file_parse(fname, &vol, &path); 86 1.3.2.2 pgoyette if (rv != 0) 87 1.3.2.2 pgoyette return rv; 88 1.3.2.2 pgoyette 89 1.3.2.2 pgoyette device = efi_vol[vol]; 90 1.3.2.2 pgoyette 91 1.3.2.2 pgoyette upath = NULL; 92 1.3.2.2 pgoyette rv = utf8_to_ucs2(path, &upath, &len); 93 1.3.2.2 pgoyette if (rv != 0) 94 1.3.2.2 pgoyette return rv; 95 1.3.2.2 pgoyette 96 1.3.2.2 pgoyette dp = FileDevicePath(device, upath); 97 1.3.2.2 pgoyette FreePool(upath); 98 1.3.2.2 pgoyette if (dp == NULL) 99 1.3.2.2 pgoyette return EINVAL; 100 1.3.2.2 pgoyette 101 1.3.2.2 pgoyette status = OpenSimpleReadFile(TRUE, NULL, 0, &dp, &file, &srf); 102 1.3.2.2 pgoyette FreePool(dp); 103 1.3.2.2 pgoyette if (EFI_ERROR(status)) 104 1.3.2.2 pgoyette return status == EFI_NOT_FOUND ? ENOENT : EIO; 105 1.3.2.2 pgoyette 106 1.3.2.2 pgoyette for (n = 0; n < ndevs; n++) 107 1.3.2.2 pgoyette if (strcmp(DEV_NAME(&devsw[n]), "efifile") == 0) { 108 1.3.2.2 pgoyette f->f_dev = &devsw[n]; 109 1.3.2.2 pgoyette break; 110 1.3.2.2 pgoyette } 111 1.3.2.2 pgoyette if (n == ndevs) 112 1.3.2.2 pgoyette return ENXIO; 113 1.3.2.2 pgoyette f->f_devdata = f; 114 1.3.2.2 pgoyette f->f_fsdata = srf; 115 1.3.2.2 pgoyette f->f_flags = F_NODEV | F_READ; 116 1.3.2.2 pgoyette 117 1.3.2.2 pgoyette return 0; 118 1.3.2.2 pgoyette } 119 1.3.2.2 pgoyette 120 1.3.2.2 pgoyette int 121 1.3.2.2 pgoyette efi_file_close(struct open_file *f) 122 1.3.2.2 pgoyette { 123 1.3.2.2 pgoyette SIMPLE_READ_FILE srf = f->f_fsdata; 124 1.3.2.2 pgoyette 125 1.3.2.2 pgoyette CloseSimpleReadFile(srf); 126 1.3.2.2 pgoyette 127 1.3.2.2 pgoyette return 0; 128 1.3.2.2 pgoyette } 129 1.3.2.2 pgoyette 130 1.3.2.2 pgoyette int 131 1.3.2.2 pgoyette efi_file_strategy(void *devdata, int rw, daddr_t dblk, size_t size, void *buf, size_t *rsize) 132 1.3.2.2 pgoyette { 133 1.3.2.2 pgoyette struct open_file *f = devdata; 134 1.3.2.2 pgoyette SIMPLE_READ_FILE srf = f->f_fsdata; 135 1.3.2.2 pgoyette EFI_STATUS status; 136 1.3.2.2 pgoyette UINTN len; 137 1.3.2.2 pgoyette 138 1.3.2.2 pgoyette if (rw != F_READ) 139 1.3.2.2 pgoyette return EROFS; 140 1.3.2.2 pgoyette 141 1.3.2.2 pgoyette len = size; 142 1.3.2.2 pgoyette status = ReadSimpleReadFile(srf, f->f_offset, &len, buf); 143 1.3.2.2 pgoyette if (EFI_ERROR(status)) 144 1.3.2.2 pgoyette return EIO; 145 1.3.2.2 pgoyette *rsize = len; 146 1.3.2.2 pgoyette 147 1.3.2.2 pgoyette return 0; 148 1.3.2.2 pgoyette } 149
Indexes created Wed Oct 29 12:09:47 GMT 2025