diff options
Diffstat (limited to 'e2fsprogs/old_e2fsprogs/ext2fs/inode_io.c')
| -rw-r--r-- | e2fsprogs/old_e2fsprogs/ext2fs/inode_io.c | 270 |
1 files changed, 0 insertions, 270 deletions
diff --git a/e2fsprogs/old_e2fsprogs/ext2fs/inode_io.c b/e2fsprogs/old_e2fsprogs/ext2fs/inode_io.c deleted file mode 100644 index b861d5ff6..000000000 --- a/e2fsprogs/old_e2fsprogs/ext2fs/inode_io.c +++ /dev/null @@ -1,270 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * inode_io.c --- This is allows an inode in an ext2 filesystem image - * to be accessed via the I/O manager interface. - * - * Copyright (C) 2002 Theodore Ts'o. - * - * %Begin-Header% - * This file may be redistributed under the terms of the GNU Public - * License. - * %End-Header% - */ - -#include <stdio.h> -#include <string.h> -#if HAVE_UNISTD_H -#include <unistd.h> -#endif -#if HAVE_ERRNO_H -#include <errno.h> -#endif -#include <time.h> - -#include "ext2_fs.h" -#include "ext2fs.h" - -/* - * For checking structure magic numbers... - */ - -#define EXT2_CHECK_MAGIC(struct, code) \ - if ((struct)->magic != (code)) return (code) - -struct inode_private_data { - int magic; - char name[32]; - ext2_file_t file; - ext2_filsys fs; - ext2_ino_t ino; - struct ext2_inode inode; - int flags; - struct inode_private_data *next; -}; - -#define CHANNEL_HAS_INODE 0x8000 - -static struct inode_private_data *top_intern; -static int ino_unique = 0; - -static errcode_t inode_open(const char *name, int flags, io_channel *channel); -static errcode_t inode_close(io_channel channel); -static errcode_t inode_set_blksize(io_channel channel, int blksize); -static errcode_t inode_read_blk(io_channel channel, unsigned long block, - int count, void *data); -static errcode_t inode_write_blk(io_channel channel, unsigned long block, - int count, const void *data); -static errcode_t inode_flush(io_channel channel); -static errcode_t inode_write_byte(io_channel channel, unsigned long offset, - int size, const void *data); - -static struct struct_io_manager struct_inode_manager = { - EXT2_ET_MAGIC_IO_MANAGER, - "Inode I/O Manager", - inode_open, - inode_close, - inode_set_blksize, - inode_read_blk, - inode_write_blk, - inode_flush, - inode_write_byte -}; - -io_manager inode_io_manager = &struct_inode_manager; - -errcode_t ext2fs_inode_io_intern2(ext2_filsys fs, ext2_ino_t ino, - struct ext2_inode *inode, - char **name) -{ - struct inode_private_data *data; - errcode_t retval; - - if ((retval = ext2fs_get_mem(sizeof(struct inode_private_data), - &data))) - return retval; - data->magic = EXT2_ET_MAGIC_INODE_IO_CHANNEL; - sprintf(data->name, "%u:%d", ino, ino_unique++); - data->file = 0; - data->fs = fs; - data->ino = ino; - data->flags = 0; - if (inode) { - memcpy(&data->inode, inode, sizeof(struct ext2_inode)); - data->flags |= CHANNEL_HAS_INODE; - } - data->next = top_intern; - top_intern = data; - *name = data->name; - return 0; -} - -errcode_t ext2fs_inode_io_intern(ext2_filsys fs, ext2_ino_t ino, - char **name) -{ - return ext2fs_inode_io_intern2(fs, ino, NULL, name); -} - - -static errcode_t inode_open(const char *name, int flags, io_channel *channel) -{ - io_channel io = NULL; - struct inode_private_data *prev, *data = NULL; - errcode_t retval; - int open_flags; - - if (name == 0) - return EXT2_ET_BAD_DEVICE_NAME; - - for (data = top_intern, prev = NULL; data; - prev = data, data = data->next) - if (strcmp(name, data->name) == 0) - break; - if (!data) - return ENOENT; - if (prev) - prev->next = data->next; - else - top_intern = data->next; - - retval = ext2fs_get_mem(sizeof(struct struct_io_channel), &io); - if (retval) - goto cleanup; - memset(io, 0, sizeof(struct struct_io_channel)); - - io->magic = EXT2_ET_MAGIC_IO_CHANNEL; - io->manager = inode_io_manager; - retval = ext2fs_get_mem(strlen(name)+1, &io->name); - if (retval) - goto cleanup; - - strcpy(io->name, name); - io->private_data = data; - io->block_size = 1024; - io->read_error = 0; - io->write_error = 0; - io->refcount = 1; - - open_flags = (flags & IO_FLAG_RW) ? EXT2_FILE_WRITE : 0; - retval = ext2fs_file_open2(data->fs, data->ino, - (data->flags & CHANNEL_HAS_INODE) ? - &data->inode : 0, open_flags, - &data->file); - if (retval) - goto cleanup; - - *channel = io; - return 0; - -cleanup: - if (data) { - ext2fs_free_mem(&data); - } - if (io) - ext2fs_free_mem(&io); - return retval; -} - -static errcode_t inode_close(io_channel channel) -{ - struct inode_private_data *data; - errcode_t retval = 0; - - EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL); - data = (struct inode_private_data *) channel->private_data; - EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_INODE_IO_CHANNEL); - - if (--channel->refcount > 0) - return 0; - - retval = ext2fs_file_close(data->file); - - ext2fs_free_mem(&channel->private_data); - if (channel->name) - ext2fs_free_mem(&channel->name); - ext2fs_free_mem(&channel); - return retval; -} - -static errcode_t inode_set_blksize(io_channel channel, int blksize) -{ - struct inode_private_data *data; - - EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL); - data = (struct inode_private_data *) channel->private_data; - EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_INODE_IO_CHANNEL); - - channel->block_size = blksize; - return 0; -} - - -static errcode_t inode_read_blk(io_channel channel, unsigned long block, - int count, void *buf) -{ - struct inode_private_data *data; - errcode_t retval; - - EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL); - data = (struct inode_private_data *) channel->private_data; - EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_INODE_IO_CHANNEL); - - if ((retval = ext2fs_file_lseek(data->file, - block * channel->block_size, - EXT2_SEEK_SET, 0))) - return retval; - - count = (count < 0) ? -count : (count * channel->block_size); - - return ext2fs_file_read(data->file, buf, count, 0); -} - -static errcode_t inode_write_blk(io_channel channel, unsigned long block, - int count, const void *buf) -{ - struct inode_private_data *data; - errcode_t retval; - - EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL); - data = (struct inode_private_data *) channel->private_data; - EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_INODE_IO_CHANNEL); - - if ((retval = ext2fs_file_lseek(data->file, - block * channel->block_size, - EXT2_SEEK_SET, 0))) - return retval; - - count = (count < 0) ? -count : (count * channel->block_size); - - return ext2fs_file_write(data->file, buf, count, 0); -} - -static errcode_t inode_write_byte(io_channel channel, unsigned long offset, - int size, const void *buf) -{ - struct inode_private_data *data; - errcode_t retval = 0; - - EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL); - data = (struct inode_private_data *) channel->private_data; - EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_INODE_IO_CHANNEL); - - if ((retval = ext2fs_file_lseek(data->file, offset, - EXT2_SEEK_SET, 0))) - return retval; - - return ext2fs_file_write(data->file, buf, size, 0); -} - -/* - * Flush data buffers to disk. - */ -static errcode_t inode_flush(io_channel channel) -{ - struct inode_private_data *data; - - EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL); - data = (struct inode_private_data *) channel->private_data; - EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_INODE_IO_CHANNEL); - - return ext2fs_file_flush(data->file); -} |