root/fs/sysv/file.c

DEFINITIONS

1. sysv_sync_file

/*
 *  linux/fs/sysv/file.c
 *
 *  minix/file.c
 *  Copyright (C) 1991, 1992  Linus Torvalds
 *
 *  coh/file.c
 *  Copyright (C) 1993  Pascal Haible, Bruno Haible
 *
 *  sysv/file.c
 *  Copyright (C) 1993  Bruno Haible
 *
 *  SystemV/Coherent regular file handling primitives
 */

#include "sysv.h"

/*
 * We have mostly NULLs here: the current defaults are OK for
 * the coh filesystem.
 */
const struct file_operations sysv_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = do_sync_read,
        .aio_read       = generic_file_aio_read,
        .write          = do_sync_write,
        .aio_write      = generic_file_aio_write,
        .mmap           = generic_file_mmap,
        .fsync          = sysv_sync_file,
        .splice_read    = generic_file_splice_read,
};

const struct inode_operations sysv_file_inode_operations = {
        .truncate       = sysv_truncate,
        .getattr        = sysv_getattr,
};

int sysv_sync_file(struct file * file, struct dentry *dentry, int datasync)
{
        struct inode *inode = dentry->d_inode;
        int err;

        err = sync_mapping_buffers(inode->i_mapping);
        if (!(inode->i_state & I_DIRTY))
                return err;
        if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
                return err;
        
        err |= sysv_sync_inode(inode);
        return err ? -EIO : 0;
}