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fs/ramfs/file-mmu.c 1.24 KB
642fb4d1f   David Howells   [PATCH] NOMMU: Pr...
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  /* file-mmu.c: ramfs MMU-based file operations
   *
   * Resizable simple ram filesystem for Linux.
   *
   * Copyright (C) 2000 Linus Torvalds.
   *               2000 Transmeta Corp.
   *
   * Usage limits added by David Gibson, Linuxcare Australia.
   * This file is released under the GPL.
   */
  
  /*
   * NOTE! This filesystem is probably most useful
   * not as a real filesystem, but as an example of
   * how virtual filesystems can be written.
   *
   * It doesn't get much simpler than this. Consider
   * that this file implements the full semantics of
   * a POSIX-compliant read-write filesystem.
   *
   * Note in particular how the filesystem does not
   * need to implement any data structures of its own
   * to keep track of the virtual data: using the VFS
   * caches is sufficient.
   */
642fb4d1f   David Howells   [PATCH] NOMMU: Pr...
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  #include <linux/fs.h>
642fb4d1f   David Howells   [PATCH] NOMMU: Pr...
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  struct address_space_operations ramfs_aops = {
  	.readpage	= simple_readpage,
  	.prepare_write	= simple_prepare_write,
  	.commit_write	= simple_commit_write
  };
  
  struct file_operations ramfs_file_operations = {
  	.read		= generic_file_read,
  	.write		= generic_file_write,
  	.mmap		= generic_file_mmap,
  	.fsync		= simple_sync_file,
  	.sendfile	= generic_file_sendfile,
  	.llseek		= generic_file_llseek,
  };
  
  struct inode_operations ramfs_file_inode_operations = {
  	.getattr	= simple_getattr,
  };