X-Git-Url: http://git.ipfire.org/?a=blobdiff_plain;f=include%2Ffs.h;h=32fc480135841333015b8628b4cfc889ba5f2ab8;hb=f1554b28d31250df5418254e79e0bf75ff3b2e54;hp=7d9403ed87588c2f254ec0a4b514fe5840eac0b9;hpb=4fa7613c50069b6821ace02b11a24b46dcbbec5e;p=people%2Fms%2Fu-boot.git diff --git a/include/fs.h b/include/fs.h index 7d9403ed87..32fc480135 100644 --- a/include/fs.h +++ b/include/fs.h @@ -1,17 +1,7 @@ /* * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see . + * SPDX-License-Identifier: GPL-2.0 */ #ifndef _FS_H #define _FS_H @@ -22,6 +12,8 @@ #define FS_TYPE_FAT 1 #define FS_TYPE_EXT 2 #define FS_TYPE_SANDBOX 3 +#define FS_TYPE_UBIFS 4 +#define FS_TYPE_BTRFS 5 /* * Tell the fs layer which block device an partition to use for future @@ -35,6 +27,17 @@ */ int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype); +/* + * fs_set_blk_dev_with_part - Set current block device + partition + * + * Similar to fs_set_blk_dev(), but useful for cases where you already + * know the blk_desc and part number. + * + * Returns 0 on success. + * Returns non-zero if invalid partition or error accessing the disk. + */ +int fs_set_blk_dev_with_part(struct blk_desc *desc, int part); + /* * Print the list of files on the partition previously set by fs_set_blk_dev(), * in directory "dirname". @@ -44,25 +47,131 @@ int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype); int fs_ls(const char *dirname); /* - * Read file "filename" from the partition previously set by fs_set_blk_dev(), - * to address "addr", starting at byte offset "offset", and reading "len" - * bytes. "offset" may be 0 to read from the start of the file. "len" may be - * 0 to read the entire file. Note that not all filesystem types support - * either/both offset!=0 or len!=0. + * Determine whether a file exists + * + * Returns 1 if the file exists, 0 if it doesn't exist. + */ +int fs_exists(const char *filename); + +/* + * fs_size - Determine a file's size * - * Returns number of bytes read on success. Returns <= 0 on error. + * @filename: Name of the file + * @size: Size of file + * @return 0 if ok with valid *size, negative on error */ -int fs_read(const char *filename, ulong addr, int offset, int len); +int fs_size(const char *filename, loff_t *size); + +/* + * fs_read - Read file from the partition previously set by fs_set_blk_dev() + * Note that not all filesystem types support either/both offset!=0 or len!=0. + * + * @filename: Name of file to read from + * @addr: The address to read into + * @offset: The offset in file to read from + * @len: The number of bytes to read. Maybe 0 to read entire file + * @actread: Returns the actual number of bytes read + * @return 0 if ok with valid *actread, -1 on error conditions + */ +int fs_read(const char *filename, ulong addr, loff_t offset, loff_t len, + loff_t *actread); + +/* + * fs_write - Write file to the partition previously set by fs_set_blk_dev() + * Note that not all filesystem types support offset!=0. + * + * @filename: Name of file to read from + * @addr: The address to read into + * @offset: The offset in file to read from. Maybe 0 to write to start of file + * @len: The number of bytes to write + * @actwrite: Returns the actual number of bytes written + * @return 0 if ok with valid *actwrite, -1 on error conditions + */ +int fs_write(const char *filename, ulong addr, loff_t offset, loff_t len, + loff_t *actwrite); + +/* + * Directory entry types, matches the subset of DT_x in posix readdir() + * which apply to u-boot. + */ +#define FS_DT_DIR 4 /* directory */ +#define FS_DT_REG 8 /* regular file */ +#define FS_DT_LNK 10 /* symbolic link */ + +/* + * A directory entry, returned by fs_readdir(). Returns information + * about the file/directory at the current directory entry position. + */ +struct fs_dirent { + unsigned type; /* one of FS_DT_x (not a mask) */ + loff_t size; /* size in bytes */ + char name[256]; +}; + +/* Note: fs_dir_stream should be treated as opaque to the user of fs layer */ +struct fs_dir_stream { + /* private to fs. layer: */ + struct blk_desc *desc; + int part; +}; + +/* + * fs_opendir - Open a directory + * + * @filename: the path to directory to open + * @return a pointer to the directory stream or NULL on error and errno + * set appropriately + */ +struct fs_dir_stream *fs_opendir(const char *filename); + +/* + * fs_readdir - Read the next directory entry in the directory stream. + * + * Works in an analogous way to posix readdir(). The previously returned + * directory entry is no longer valid after calling fs_readdir() again. + * After fs_closedir() is called, the returned directory entry is no + * longer valid. + * + * @dirs: the directory stream + * @return the next directory entry (only valid until next fs_readdir() or + * fs_closedir() call, do not attempt to free()) or NULL if the end of + * the directory is reached. + */ +struct fs_dirent *fs_readdir(struct fs_dir_stream *dirs); + +/* + * fs_closedir - close a directory stream + * + * @dirs: the directory stream + */ +void fs_closedir(struct fs_dir_stream *dirs); /* * Common implementation for various filesystem commands, optionally limited * to a specific filesystem type via the fstype parameter. */ +int do_size(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], + int fstype); int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], int fstype); int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], int fstype); +int file_exists(const char *dev_type, const char *dev_part, const char *file, + int fstype); int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], int fstype); +/* + * Determine the UUID of the specified filesystem and print it. Optionally it is + * possible to store the UUID directly in env. + */ +int do_fs_uuid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], + int fstype); + +/* + * Determine the type of the specified filesystem and print it. Optionally it is + * possible to store the type directly in env. + */ +int do_fs_type(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); + #endif /* _FS_H */