1 files changed, 235 insertions, 0 deletions
diff --git a/include/fs.h b/include/fs.h
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index 0000000..742a535
--- /dev/null
+++ b/include/fs.h
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+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
+ */
+#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);
+
+/**
+ * fs_close() - Unset current block device and partition
+ *
+ * fs_close() closes the connection to a file system opened with either
+ * fs_set_blk_dev() or fs_set_dev_with_part().
+ *
+ * Many file functions implicitly call fs_close(), e.g. fs_closedir(),
+ * fs_exist(), fs_ln(), fs_ls(), fs_mkdir(), fs_read(), fs_size(), fs_write(),
+ * fs_unlink().
+ */
+void fs_close(void);
+
+/**
+ * fs_get_type() - Get type of current filesystem
+ *
+ * Return: filesystem type
+ *
+ * Returns filesystem type representing the current filesystem, or
+ * FS_TYPE_ANY for any unrecognised filesystem.
+ */
+int fs_get_type(void);
+
+/**
+ * fs_get_type_name() - Get type of current filesystem
+ *
+ * Return: Pointer to filesystem name
+ *
+ * Returns a string describing the current filesystem, or the sentinel
+ * "unsupported" for any unrecognised filesystem.
+ */
+const char *fs_get_type_name(void);
+
+/*
+ * 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 drivers support either or both of offset != 0
+ * and len != 0.
+ *
+ * @filename:	full path of the file to read from
+ * @addr:	address of the buffer to write to
+ * @offset:	offset in the file from where to start reading
+ * @len:	the number of bytes to read. Use 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 drivers support offset != 0.
+ *
+ * @filename:	full path of the file to write to
+ * @addr:	address of the buffer to read from
+ * @offset:	offset in the file from where to start writing
+ * @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);
+
+/*
+ * fs_unlink - delete a file or directory
+ *
+ * If a given name is a directory, it will be deleted only if it's empty
+ *
+ * @filename: Name of file or directory to delete
+ * @return 0 on success, -1 on error conditions
+ */
+int fs_unlink(const char *filename);
+
+/*
+ * fs_mkdir - Create a directory
+ *
+ * @filename: Name of directory to create
+ * @return 0 on success, -1 on error conditions
+ */
+int fs_mkdir(const char *filename);
+
+/*
+ * 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);
+int do_rm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
+		int fstype);
+int do_mkdir(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
+		int fstype);
+int do_ln(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 */