119 lines
2.4 KiB
C
119 lines
2.4 KiB
C
/**
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* libf2fs.c
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*
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* Copyright (c) 2013 Samsung Electronics Co., Ltd.
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* http://www.samsung.com/
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*
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* Dual licensed under the GPL or LGPL version 2 licenses.
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*/
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#define _LARGEFILE64_SOURCE
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <time.h>
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#include <sys/stat.h>
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#include <sys/mount.h>
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#include <sys/ioctl.h>
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#include <f2fs_fs.h>
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struct f2fs_configuration config;
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/*
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* IO interfaces
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*/
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int dev_read_version(void *buf, __u64 offset, size_t len)
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{
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if (lseek64(config.kd, (off64_t)offset, SEEK_SET) < 0)
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return -1;
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if (read(config.kd, buf, len) < 0)
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return -1;
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return 0;
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}
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int dev_read(void *buf, __u64 offset, size_t len)
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{
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if (lseek64(config.fd, (off64_t)offset, SEEK_SET) < 0)
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return -1;
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if (read(config.fd, buf, len) < 0)
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return -1;
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return 0;
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}
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int dev_readahead(__u64 offset, size_t len)
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{
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#ifdef POSIX_FADV_WILLNEED
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return posix_fadvise(config.fd, offset, len, POSIX_FADV_WILLNEED);
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#else
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return 0;
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#endif
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}
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int dev_write(void *buf, __u64 offset, size_t len)
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{
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if (lseek64(config.fd, (off64_t)offset, SEEK_SET) < 0)
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return -1;
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if (write(config.fd, buf, len) < 0)
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return -1;
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return 0;
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}
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int dev_write_block(void *buf, __u64 blk_addr)
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{
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return dev_write(buf, blk_addr * F2FS_BLKSIZE, F2FS_BLKSIZE);
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}
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int dev_write_dump(void *buf, __u64 offset, size_t len)
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{
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if (lseek64(config.dump_fd, (off64_t)offset, SEEK_SET) < 0)
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return -1;
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if (write(config.dump_fd, buf, len) < 0)
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return -1;
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return 0;
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}
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int dev_fill(void *buf, __u64 offset, size_t len)
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{
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/* Only allow fill to zero */
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if (*((__u8*)buf))
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return -1;
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if (lseek64(config.fd, (off64_t)offset, SEEK_SET) < 0)
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return -1;
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if (write(config.fd, buf, len) < 0)
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return -1;
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return 0;
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}
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int dev_read_block(void *buf, __u64 blk_addr)
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{
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return dev_read(buf, blk_addr * F2FS_BLKSIZE, F2FS_BLKSIZE);
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}
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int dev_read_blocks(void *buf, __u64 addr, __u32 nr_blks)
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{
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return dev_read(buf, addr * F2FS_BLKSIZE, nr_blks * F2FS_BLKSIZE);
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}
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int dev_reada_block(__u64 blk_addr)
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{
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return dev_readahead(blk_addr * F2FS_BLKSIZE, F2FS_BLKSIZE);
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}
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void f2fs_finalize_device(struct f2fs_configuration *c)
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{
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/*
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* We should call fsync() to flush out all the dirty pages
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* in the block device page cache.
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*/
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if (fsync(c->fd) < 0)
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MSG(0, "\tError: Could not conduct fsync!!!\n");
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if (close(c->fd) < 0)
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MSG(0, "\tError: Failed to close device file!!!\n");
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close(c->kd);
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}
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