mirror of https://gitee.com/openkylin/linux.git
52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
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/*
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* linux/fs/ext2/fsync.c
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*
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* Copyright (C) 1993 Stephen Tweedie (sct@dcs.ed.ac.uk)
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* from
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* Copyright (C) 1992 Remy Card (card@masi.ibp.fr)
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* Laboratoire MASI - Institut Blaise Pascal
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* Universite Pierre et Marie Curie (Paris VI)
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* from
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* linux/fs/minix/truncate.c Copyright (C) 1991, 1992 Linus Torvalds
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*
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* ext2fs fsync primitive
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*
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* Big-endian to little-endian byte-swapping/bitmaps by
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* David S. Miller (davem@caip.rutgers.edu), 1995
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*
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* Removed unnecessary code duplication for little endian machines
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* and excessive __inline__s.
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* Andi Kleen, 1997
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*
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* Major simplications and cleanup - we only need to do the metadata, because
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* we can depend on generic_block_fdatasync() to sync the data blocks.
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*/
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#include "ext2.h"
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#include <linux/smp_lock.h>
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#include <linux/buffer_head.h> /* for fsync_inode_buffers() */
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/*
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* File may be NULL when we are called. Perhaps we shouldn't
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* even pass file to fsync ?
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*/
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int ext2_sync_file(struct file *file, struct dentry *dentry, int datasync)
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{
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struct inode *inode = dentry->d_inode;
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int err;
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int ret;
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ret = sync_mapping_buffers(inode->i_mapping);
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if (!(inode->i_state & I_DIRTY))
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return ret;
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if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
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return ret;
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err = ext2_sync_inode(inode);
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if (ret == 0)
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ret = err;
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return ret;
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}
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