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include/fs.h
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/* * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. * * SPDX-License-Identifier: GPL-2.0 */ #ifndef _FS_H #define _FS_H #include <common.h> #define FS_TYPE_ANY 0 #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 * commands. This also internally identifies the filesystem that is present * within the partition. The identification process may be limited to a * specific filesystem type by passing FS_* in the fstype parameter. * * Returns 0 on success. * Returns non-zero if there is an error accessing the disk or partition, or * no known filesystem type could be recognized on it. */ 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". * * Returns 0 on success. Returns non-zero on error. */ int fs_ls(const char *dirname); /* * 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 * * @filename: Name of the file * @size: Size of file * @return 0 if ok with valid *size, negative on error */ 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 */ |