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Diffstat (limited to 'e2fsprogs/ext2fs/inode_io.c')
-rw-r--r--e2fsprogs/ext2fs/inode_io.c271
1 files changed, 0 insertions, 271 deletions
diff --git a/e2fsprogs/ext2fs/inode_io.c b/e2fsprogs/ext2fs/inode_io.c
deleted file mode 100644
index 4bfa93a..0000000
--- a/e2fsprogs/ext2fs/inode_io.c
+++ /dev/null
@@ -1,271 +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);
-}
-
generated by cgit v1.1 at 2024-12-28 07:44:02 +0000