fs/ext3/file.c

   1 /*
   2  *  linux/fs/ext3/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  *  ext3 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/quotaops.h>
  22 #include "ext3.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 ext3_file_open: open gets called at every open, but release
  29  * gets called only when /all/ the files are closed.
  30  */
  31 static int ext3_release_file (struct inode * inode, struct file * filp)
  32 {
  33         if (ext3_test_inode_state(inode, EXT3_STATE_FLUSH_ON_CLOSE)) {
  34                 filemap_flush(inode->i_mapping);
  35                 ext3_clear_inode_state(inode, EXT3_STATE_FLUSH_ON_CLOSE);
  36         }
  37         /* if we are the last writer on the inode, drop the block reservation */
  38         if ((filp->f_mode & FMODE_WRITE) &&
  39                         (atomic_read(&inode->i_writecount) == 1))
  40         {
  41                 mutex_lock(&EXT3_I(inode)->truncate_mutex);
  42                 ext3_discard_reservation(inode);
  43                 mutex_unlock(&EXT3_I(inode)->truncate_mutex);
  44         }
  45         if (is_dx(inode) && filp->private_data)
  46                 ext3_htree_free_dir_info(filp->private_data);
  47
  48         return 0;
  49 }
  50
  51 const struct file_operations ext3_file_operations = {
  52         .llseek         = generic_file_llseek,
  53         .read           = do_sync_read,
  54         .write          = do_sync_write,
  55         .aio_read       = generic_file_aio_read,
  56         .aio_write      = generic_file_aio_write,
  57         .unlocked_ioctl = ext3_ioctl,
  58 #ifdef CONFIG_COMPAT
  59         .compat_ioctl   = ext3_compat_ioctl,
  60 #endif
  61         .mmap           = generic_file_mmap,
  62         .open           = dquot_file_open,
  63         .release        = ext3_release_file,
  64         .fsync          = ext3_sync_file,
  65         .splice_read    = generic_file_splice_read,
  66         .splice_write   = generic_file_splice_write,
  67 };
  68
  69 const struct inode_operations ext3_file_inode_operations = {
  70         .setattr        = ext3_setattr,
  71 #ifdef CONFIG_EXT3_FS_XATTR
  72         .setxattr       = generic_setxattr,
  73         .getxattr       = generic_getxattr,
  74         .listxattr      = ext3_listxattr,
  75         .removexattr    = generic_removexattr,
  76 #endif
  77         .get_acl        = ext3_get_acl,
  78         .fiemap         = ext3_fiemap,
  79 };
  80