1 /* 2 * Copyright (c) 2012, Google Inc. 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <fs.h> 9 #include <os.h> 10 11 int sandbox_fs_set_blk_dev(struct blk_desc *rbdd, disk_partition_t *info) 12 { 13 /* 14 * Only accept a NULL struct blk_desc for the sandbox, which is when 15 * hostfs interface is used 16 */ 17 return rbdd != NULL; 18 } 19 20 int sandbox_fs_read_at(const char *filename, loff_t pos, void *buffer, 21 loff_t maxsize, loff_t *actread) 22 { 23 loff_t size; 24 int fd, ret; 25 26 fd = os_open(filename, OS_O_RDONLY); 27 if (fd < 0) 28 return fd; 29 ret = os_lseek(fd, pos, OS_SEEK_SET); 30 if (ret == -1) { 31 os_close(fd); 32 return ret; 33 } 34 if (!maxsize) { 35 ret = os_get_filesize(filename, &size); 36 if (ret) { 37 os_close(fd); 38 return ret; 39 } 40 41 maxsize = size; 42 } 43 44 size = os_read(fd, buffer, maxsize); 45 os_close(fd); 46 47 if (size < 0) { 48 ret = -1; 49 } else { 50 ret = 0; 51 *actread = size; 52 } 53 54 return ret; 55 } 56 57 int sandbox_fs_write_at(const char *filename, loff_t pos, void *buffer, 58 loff_t towrite, loff_t *actwrite) 59 { 60 ssize_t size; 61 int fd, ret; 62 63 fd = os_open(filename, OS_O_RDWR | OS_O_CREAT); 64 if (fd < 0) 65 return fd; 66 ret = os_lseek(fd, pos, OS_SEEK_SET); 67 if (ret == -1) { 68 os_close(fd); 69 return ret; 70 } 71 size = os_write(fd, buffer, towrite); 72 os_close(fd); 73 74 if (size == -1) { 75 ret = -1; 76 } else { 77 ret = 0; 78 *actwrite = size; 79 } 80 81 return ret; 82 } 83 84 int sandbox_fs_ls(const char *dirname) 85 { 86 struct os_dirent_node *head, *node; 87 int ret; 88 89 ret = os_dirent_ls(dirname, &head); 90 if (ret) 91 return ret; 92 93 for (node = head; node; node = node->next) { 94 printf("%s %10lu %s\n", os_dirent_get_typename(node->type), 95 node->size, node->name); 96 } 97 os_dirent_free(head); 98 99 return 0; 100 } 101 102 int sandbox_fs_exists(const char *filename) 103 { 104 loff_t size; 105 int ret; 106 107 ret = os_get_filesize(filename, &size); 108 return ret == 0; 109 } 110 111 int sandbox_fs_size(const char *filename, loff_t *size) 112 { 113 return os_get_filesize(filename, size); 114 } 115 116 void sandbox_fs_close(void) 117 { 118 } 119 120 int fs_read_sandbox(const char *filename, void *buf, loff_t offset, loff_t len, 121 loff_t *actread) 122 { 123 int ret; 124 125 ret = sandbox_fs_read_at(filename, offset, buf, len, actread); 126 if (ret) 127 printf("** Unable to read file %s **\n", filename); 128 129 return ret; 130 } 131 132 int fs_write_sandbox(const char *filename, void *buf, loff_t offset, 133 loff_t len, loff_t *actwrite) 134 { 135 int ret; 136 137 ret = sandbox_fs_write_at(filename, offset, buf, len, actwrite); 138 if (ret) 139 printf("** Unable to write file %s **\n", filename); 140 141 return ret; 142 } 143