mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-05 11:00:15 +00:00
f739fcd831
As part of the main conversion a few files were missed. These files had
additional whitespace after the '*' and before the SPDX tag and my
previous regex was too strict. This time I did a grep for all SPDX tags
and then filtered out anything that matched the correct styles.
Fixes: 83d290c56f
("SPDX: Convert all of our single license tags to Linux Kernel style")
Reported-by: Heinrich Schuchardt <xypron.debian@gmx.de>
Signed-off-by: Tom Rini <trini@konsulko.com>
620 lines
13 KiB
C
620 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* EFI utils
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*
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* Copyright (c) 2017 Rob Clark
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*/
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#include <common.h>
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#include <charset.h>
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#include <efi_loader.h>
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#include <malloc.h>
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#include <fs.h>
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/* GUID for file system information */
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const efi_guid_t efi_file_system_info_guid = EFI_FILE_SYSTEM_INFO_GUID;
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struct file_system {
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struct efi_simple_file_system_protocol base;
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struct efi_device_path *dp;
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struct blk_desc *desc;
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int part;
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};
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#define to_fs(x) container_of(x, struct file_system, base)
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struct file_handle {
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struct efi_file_handle base;
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struct file_system *fs;
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loff_t offset; /* current file position/cursor */
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int isdir;
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/* for reading a directory: */
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struct fs_dir_stream *dirs;
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struct fs_dirent *dent;
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char path[0];
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};
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#define to_fh(x) container_of(x, struct file_handle, base)
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static const struct efi_file_handle efi_file_handle_protocol;
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static char *basename(struct file_handle *fh)
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{
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char *s = strrchr(fh->path, '/');
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if (s)
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return s + 1;
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return fh->path;
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}
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static int set_blk_dev(struct file_handle *fh)
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{
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return fs_set_blk_dev_with_part(fh->fs->desc, fh->fs->part);
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}
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static int is_dir(struct file_handle *fh)
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{
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struct fs_dir_stream *dirs;
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set_blk_dev(fh);
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dirs = fs_opendir(fh->path);
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if (!dirs)
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return 0;
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fs_closedir(dirs);
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return 1;
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}
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/*
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* Normalize a path which may include either back or fwd slashes,
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* double slashes, . or .. entries in the path, etc.
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*/
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static int sanitize_path(char *path)
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{
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char *p;
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/* backslash to slash: */
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p = path;
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while ((p = strchr(p, '\\')))
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*p++ = '/';
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/* handle double-slashes: */
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p = path;
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while ((p = strstr(p, "//"))) {
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char *src = p + 1;
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memmove(p, src, strlen(src) + 1);
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}
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/* handle extra /.'s */
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p = path;
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while ((p = strstr(p, "/."))) {
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/*
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* You'd be tempted to do this *after* handling ".."s
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* below to avoid having to check if "/." is start of
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* a "/..", but that won't have the correct results..
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* for example, "/foo/./../bar" would get resolved to
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* "/foo/bar" if you did these two passes in the other
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* order
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*/
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if (p[2] == '.') {
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p += 2;
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continue;
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}
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char *src = p + 2;
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memmove(p, src, strlen(src) + 1);
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}
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/* handle extra /..'s: */
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p = path;
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while ((p = strstr(p, "/.."))) {
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char *src = p + 3;
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p--;
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/* find beginning of previous path entry: */
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while (true) {
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if (p < path)
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return -1;
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if (*p == '/')
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break;
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p--;
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}
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memmove(p, src, strlen(src) + 1);
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}
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return 0;
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}
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/* NOTE: despite what you would expect, 'file_name' is actually a path.
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* With windoze style backlashes, ofc.
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*/
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static struct efi_file_handle *file_open(struct file_system *fs,
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struct file_handle *parent, s16 *file_name, u64 mode)
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{
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struct file_handle *fh;
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char f0[MAX_UTF8_PER_UTF16] = {0};
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int plen = 0;
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int flen = 0;
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if (file_name) {
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utf16_to_utf8((u8 *)f0, (u16 *)file_name, 1);
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flen = utf16_strlen((u16 *)file_name);
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}
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/* we could have a parent, but also an absolute path: */
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if (f0[0] == '\\') {
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plen = 0;
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} else if (parent) {
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plen = strlen(parent->path) + 1;
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}
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/* +2 is for null and '/' */
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fh = calloc(1, sizeof(*fh) + plen + (flen * MAX_UTF8_PER_UTF16) + 2);
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fh->base = efi_file_handle_protocol;
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fh->fs = fs;
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if (parent) {
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char *p = fh->path;
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if (plen > 0) {
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strcpy(p, parent->path);
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p += plen - 1;
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*p++ = '/';
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}
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utf16_to_utf8((u8 *)p, (u16 *)file_name, flen);
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if (sanitize_path(fh->path))
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goto error;
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/* check if file exists: */
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if (set_blk_dev(fh))
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goto error;
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if (!((mode & EFI_FILE_MODE_CREATE) || fs_exists(fh->path)))
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goto error;
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/* figure out if file is a directory: */
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fh->isdir = is_dir(fh);
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} else {
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fh->isdir = 1;
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strcpy(fh->path, "");
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}
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return &fh->base;
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error:
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free(fh);
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return NULL;
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}
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static efi_status_t EFIAPI efi_file_open(struct efi_file_handle *file,
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struct efi_file_handle **new_handle,
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s16 *file_name, u64 open_mode, u64 attributes)
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{
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struct file_handle *fh = to_fh(file);
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EFI_ENTRY("%p, %p, \"%ls\", %llx, %llu", file, new_handle, file_name,
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open_mode, attributes);
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*new_handle = file_open(fh->fs, fh, file_name, open_mode);
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if (!*new_handle)
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return EFI_EXIT(EFI_NOT_FOUND);
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return EFI_EXIT(EFI_SUCCESS);
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}
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static efi_status_t file_close(struct file_handle *fh)
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{
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fs_closedir(fh->dirs);
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free(fh);
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return EFI_SUCCESS;
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}
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static efi_status_t EFIAPI efi_file_close(struct efi_file_handle *file)
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{
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struct file_handle *fh = to_fh(file);
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EFI_ENTRY("%p", file);
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return EFI_EXIT(file_close(fh));
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}
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static efi_status_t EFIAPI efi_file_delete(struct efi_file_handle *file)
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{
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struct file_handle *fh = to_fh(file);
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EFI_ENTRY("%p", file);
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file_close(fh);
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return EFI_EXIT(EFI_WARN_DELETE_FAILURE);
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}
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static efi_status_t file_read(struct file_handle *fh, u64 *buffer_size,
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void *buffer)
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{
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loff_t actread;
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if (fs_read(fh->path, (ulong)buffer, fh->offset,
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*buffer_size, &actread))
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return EFI_DEVICE_ERROR;
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*buffer_size = actread;
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fh->offset += actread;
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return EFI_SUCCESS;
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}
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static efi_status_t dir_read(struct file_handle *fh, u64 *buffer_size,
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void *buffer)
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{
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struct efi_file_info *info = buffer;
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struct fs_dirent *dent;
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unsigned int required_size;
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if (!fh->dirs) {
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assert(fh->offset == 0);
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fh->dirs = fs_opendir(fh->path);
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if (!fh->dirs)
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return EFI_DEVICE_ERROR;
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}
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/*
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* So this is a bit awkward. Since fs layer is stateful and we
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* can't rewind an entry, in the EFI_BUFFER_TOO_SMALL case below
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* we might have to return without consuming the dent.. so we
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* have to stash it for next call.
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*/
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if (fh->dent) {
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dent = fh->dent;
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fh->dent = NULL;
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} else {
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dent = fs_readdir(fh->dirs);
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}
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if (!dent) {
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/* no more files in directory: */
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/* workaround shim.efi bug/quirk.. as find_boot_csv()
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* loops through directory contents, it initially calls
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* read w/ zero length buffer to find out how much mem
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* to allocate for the EFI_FILE_INFO, then allocates,
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* and then calls a 2nd time. If we return size of
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* zero the first time, it happily passes that to
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* AllocateZeroPool(), and when that returns NULL it
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* thinks it is EFI_OUT_OF_RESOURCES. So on first
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* call return a non-zero size:
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*/
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if (*buffer_size == 0)
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*buffer_size = sizeof(*info);
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else
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*buffer_size = 0;
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return EFI_SUCCESS;
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}
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/* check buffer size: */
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required_size = sizeof(*info) + 2 * (strlen(dent->name) + 1);
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if (*buffer_size < required_size) {
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*buffer_size = required_size;
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fh->dent = dent;
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return EFI_BUFFER_TOO_SMALL;
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}
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*buffer_size = required_size;
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memset(info, 0, required_size);
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info->size = required_size;
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info->file_size = dent->size;
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info->physical_size = dent->size;
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if (dent->type == FS_DT_DIR)
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info->attribute |= EFI_FILE_DIRECTORY;
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ascii2unicode((u16 *)info->file_name, dent->name);
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fh->offset++;
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return EFI_SUCCESS;
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}
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static efi_status_t EFIAPI efi_file_read(struct efi_file_handle *file,
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efi_uintn_t *buffer_size, void *buffer)
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{
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struct file_handle *fh = to_fh(file);
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efi_status_t ret = EFI_SUCCESS;
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u64 bs;
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EFI_ENTRY("%p, %p, %p", file, buffer_size, buffer);
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if (!buffer_size || !buffer) {
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ret = EFI_INVALID_PARAMETER;
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goto error;
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}
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if (set_blk_dev(fh)) {
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ret = EFI_DEVICE_ERROR;
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goto error;
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}
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bs = *buffer_size;
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if (fh->isdir)
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ret = dir_read(fh, &bs, buffer);
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else
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ret = file_read(fh, &bs, buffer);
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if (bs <= SIZE_MAX)
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*buffer_size = bs;
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else
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*buffer_size = SIZE_MAX;
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error:
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return EFI_EXIT(ret);
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}
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static efi_status_t EFIAPI efi_file_write(struct efi_file_handle *file,
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efi_uintn_t *buffer_size,
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void *buffer)
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{
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struct file_handle *fh = to_fh(file);
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efi_status_t ret = EFI_SUCCESS;
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loff_t actwrite;
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EFI_ENTRY("%p, %p, %p", file, buffer_size, buffer);
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if (set_blk_dev(fh)) {
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ret = EFI_DEVICE_ERROR;
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goto error;
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}
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if (fs_write(fh->path, (ulong)buffer, fh->offset, *buffer_size,
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&actwrite)) {
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ret = EFI_DEVICE_ERROR;
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goto error;
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}
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*buffer_size = actwrite;
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fh->offset += actwrite;
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error:
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return EFI_EXIT(ret);
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}
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static efi_status_t EFIAPI efi_file_getpos(struct efi_file_handle *file,
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efi_uintn_t *pos)
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{
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struct file_handle *fh = to_fh(file);
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EFI_ENTRY("%p, %p", file, pos);
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if (fh->offset <= SIZE_MAX) {
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*pos = fh->offset;
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return EFI_EXIT(EFI_SUCCESS);
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} else {
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return EFI_EXIT(EFI_DEVICE_ERROR);
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}
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}
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static efi_status_t EFIAPI efi_file_setpos(struct efi_file_handle *file,
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efi_uintn_t pos)
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{
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struct file_handle *fh = to_fh(file);
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efi_status_t ret = EFI_SUCCESS;
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EFI_ENTRY("%p, %zu", file, pos);
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if (fh->isdir) {
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if (pos != 0) {
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ret = EFI_UNSUPPORTED;
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goto error;
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}
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fs_closedir(fh->dirs);
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fh->dirs = NULL;
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}
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if (pos == ~0ULL) {
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loff_t file_size;
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if (set_blk_dev(fh)) {
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ret = EFI_DEVICE_ERROR;
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goto error;
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}
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if (fs_size(fh->path, &file_size)) {
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ret = EFI_DEVICE_ERROR;
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goto error;
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}
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pos = file_size;
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}
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fh->offset = pos;
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error:
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return EFI_EXIT(ret);
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}
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static efi_status_t EFIAPI efi_file_getinfo(struct efi_file_handle *file,
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const efi_guid_t *info_type,
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efi_uintn_t *buffer_size,
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void *buffer)
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{
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struct file_handle *fh = to_fh(file);
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efi_status_t ret = EFI_SUCCESS;
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EFI_ENTRY("%p, %p, %p, %p", file, info_type, buffer_size, buffer);
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if (!guidcmp(info_type, &efi_file_info_guid)) {
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struct efi_file_info *info = buffer;
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char *filename = basename(fh);
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unsigned int required_size;
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loff_t file_size;
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/* check buffer size: */
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required_size = sizeof(*info) + 2 * (strlen(filename) + 1);
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if (*buffer_size < required_size) {
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*buffer_size = required_size;
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ret = EFI_BUFFER_TOO_SMALL;
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goto error;
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}
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if (set_blk_dev(fh)) {
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ret = EFI_DEVICE_ERROR;
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goto error;
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}
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if (fs_size(fh->path, &file_size)) {
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ret = EFI_DEVICE_ERROR;
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goto error;
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}
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memset(info, 0, required_size);
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info->size = required_size;
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info->file_size = file_size;
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info->physical_size = file_size;
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if (fh->isdir)
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info->attribute |= EFI_FILE_DIRECTORY;
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ascii2unicode((u16 *)info->file_name, filename);
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} else if (!guidcmp(info_type, &efi_file_system_info_guid)) {
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struct efi_file_system_info *info = buffer;
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disk_partition_t part;
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efi_uintn_t required_size;
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int r;
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if (fh->fs->part >= 1)
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r = part_get_info(fh->fs->desc, fh->fs->part, &part);
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else
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r = part_get_info_whole_disk(fh->fs->desc, &part);
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if (r < 0) {
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ret = EFI_DEVICE_ERROR;
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goto error;
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}
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required_size = sizeof(info) + 2 *
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(strlen((const char *)part.name) + 1);
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if (*buffer_size < required_size) {
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*buffer_size = required_size;
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ret = EFI_BUFFER_TOO_SMALL;
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goto error;
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}
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memset(info, 0, required_size);
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info->size = required_size;
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info->read_only = true;
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info->volume_size = part.size * part.blksz;
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info->free_space = 0;
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info->block_size = part.blksz;
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/*
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* TODO: The volume label is not available in U-Boot.
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* Use the partition name as substitute.
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*/
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ascii2unicode((u16 *)info->volume_label,
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(const char *)part.name);
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} else {
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ret = EFI_UNSUPPORTED;
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}
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error:
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return EFI_EXIT(ret);
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}
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static efi_status_t EFIAPI efi_file_setinfo(struct efi_file_handle *file,
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const efi_guid_t *info_type,
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efi_uintn_t buffer_size,
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void *buffer)
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{
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EFI_ENTRY("%p, %p, %zu, %p", file, info_type, buffer_size, buffer);
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return EFI_EXIT(EFI_UNSUPPORTED);
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}
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static efi_status_t EFIAPI efi_file_flush(struct efi_file_handle *file)
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{
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EFI_ENTRY("%p", file);
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return EFI_EXIT(EFI_SUCCESS);
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}
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static const struct efi_file_handle efi_file_handle_protocol = {
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.rev = EFI_FILE_PROTOCOL_REVISION,
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.open = efi_file_open,
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.close = efi_file_close,
|
|
.delete = efi_file_delete,
|
|
.read = efi_file_read,
|
|
.write = efi_file_write,
|
|
.getpos = efi_file_getpos,
|
|
.setpos = efi_file_setpos,
|
|
.getinfo = efi_file_getinfo,
|
|
.setinfo = efi_file_setinfo,
|
|
.flush = efi_file_flush,
|
|
};
|
|
|
|
struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp)
|
|
{
|
|
struct efi_simple_file_system_protocol *v;
|
|
struct efi_file_handle *f;
|
|
efi_status_t ret;
|
|
|
|
v = efi_fs_from_path(fp);
|
|
if (!v)
|
|
return NULL;
|
|
|
|
EFI_CALL(ret = v->open_volume(v, &f));
|
|
if (ret != EFI_SUCCESS)
|
|
return NULL;
|
|
|
|
/* skip over device-path nodes before the file path: */
|
|
while (fp && !EFI_DP_TYPE(fp, MEDIA_DEVICE, FILE_PATH))
|
|
fp = efi_dp_next(fp);
|
|
|
|
while (fp) {
|
|
struct efi_device_path_file_path *fdp =
|
|
container_of(fp, struct efi_device_path_file_path, dp);
|
|
struct efi_file_handle *f2;
|
|
|
|
if (!EFI_DP_TYPE(fp, MEDIA_DEVICE, FILE_PATH)) {
|
|
printf("bad file path!\n");
|
|
f->close(f);
|
|
return NULL;
|
|
}
|
|
|
|
EFI_CALL(ret = f->open(f, &f2, (s16 *)fdp->str,
|
|
EFI_FILE_MODE_READ, 0));
|
|
if (ret != EFI_SUCCESS)
|
|
return NULL;
|
|
|
|
fp = efi_dp_next(fp);
|
|
|
|
EFI_CALL(f->close(f));
|
|
f = f2;
|
|
}
|
|
|
|
return f;
|
|
}
|
|
|
|
static efi_status_t EFIAPI
|
|
efi_open_volume(struct efi_simple_file_system_protocol *this,
|
|
struct efi_file_handle **root)
|
|
{
|
|
struct file_system *fs = to_fs(this);
|
|
|
|
EFI_ENTRY("%p, %p", this, root);
|
|
|
|
*root = file_open(fs, NULL, NULL, 0);
|
|
|
|
return EFI_EXIT(EFI_SUCCESS);
|
|
}
|
|
|
|
struct efi_simple_file_system_protocol *
|
|
efi_simple_file_system(struct blk_desc *desc, int part,
|
|
struct efi_device_path *dp)
|
|
{
|
|
struct file_system *fs;
|
|
|
|
fs = calloc(1, sizeof(*fs));
|
|
fs->base.rev = EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_REVISION;
|
|
fs->base.open_volume = efi_open_volume;
|
|
fs->desc = desc;
|
|
fs->part = part;
|
|
fs->dp = dp;
|
|
|
|
return &fs->base;
|
|
}
|