fs/ext2/file.c

   1 /*
   2  *  linux/fs/ext2/file.c
   3  *
   4  * Copyright (C) 1992, 1993, 1994, 1995
   5  * Remy Card (card@masi.ibp.fr)
   6  * Laboratoire MASI - Institut Blaise Pascal
   7  * Universite Pierre et Marie Curie (Paris VI)
   8  *
   9  *  from
  10  *
  11  *  linux/fs/minix/file.c
  12  *
  13  *  Copyright (C) 1991, 1992  Linus Torvalds
  14  *
  15  *  ext2 fs regular file handling primitives
  16  *
  17  *  64-bit file support on 64-bit platforms by Jakub Jelinek
  18  *      (jj@sunsite.ms.mff.cuni.cz)
  19  */
  20
  21 #include <linux/time.h>
  22 #include "ext2.h"
  23 #include "xattr.h"
  24 #include "acl.h"
  25
  26 /*
  27  * Called when an inode is released. Note that this is different
  28  * from ext2_open_file: open gets called at every open, but release
  29  * gets called only when /all/ the files are closed.
  30  */
  31 static int ext2_release_file (struct inode * inode, struct file * filp)
  32 {
  33         if (filp->f_mode & FMODE_WRITE)
  34                 ext2_discard_prealloc (inode);
  35         return 0;
  36 }
  37
  38 /*
  39  * We have mostly NULL's here: the current defaults are ok for
  40  * the ext2 filesystem.
  41  */
  42 const struct file_operations ext2_file_operations = {
  43         .llseek         = generic_file_llseek,
  44         .read           = do_sync_read,
  45         .write          = do_sync_write,
  46         .aio_read       = generic_file_aio_read,
  47         .aio_write      = generic_file_aio_write,
  48         .ioctl          = ext2_ioctl,
  49 #ifdef CONFIG_COMPAT
  50         .compat_ioctl   = ext2_compat_ioctl,
  51 #endif
  52         .mmap           = generic_file_mmap,
  53         .open           = generic_file_open,
  54         .release        = ext2_release_file,
  55         .fsync          = ext2_sync_file,
  56         .sendfile       = generic_file_sendfile,
  57         .splice_read    = generic_file_splice_read,
  58         .splice_write   = generic_file_splice_write,
  59 };
  60
  61 #ifdef CONFIG_EXT2_FS_XIP
  62 const struct file_operations ext2_xip_file_operations = {
  63         .llseek         = generic_file_llseek,
  64         .read           = xip_file_read,
  65         .write          = xip_file_write,
  66         .ioctl          = ext2_ioctl,
  67 #ifdef CONFIG_COMPAT
  68         .compat_ioctl   = ext2_compat_ioctl,
  69 #endif
  70         .mmap           = xip_file_mmap,
  71         .open           = generic_file_open,
  72         .release        = ext2_release_file,
  73         .fsync          = ext2_sync_file,
  74         .sendfile       = xip_file_sendfile,
  75 };
  76 #endif
  77
  78 struct inode_operations ext2_file_inode_operations = {
  79         .truncate       = ext2_truncate,
  80 #ifdef CONFIG_EXT2_FS_XATTR
  81         .setxattr       = generic_setxattr,
  82         .getxattr       = generic_getxattr,
  83         .listxattr      = ext2_listxattr,
  84         .removexattr    = generic_removexattr,
  85 #endif
  86         .setattr        = ext2_setattr,
  87         .permission     = ext2_permission,
  88 };