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/time.h>
  22 #include <linux/fs.h>
  23 #include <linux/jbd.h>
  24 #include <linux/quotaops.h>
  25 #include <linux/ext3_fs.h>
  26 #include <linux/ext3_jbd.h>
  27 #include "xattr.h"
  28 #include "acl.h"
  29
  30 /*
  31  * Called when an inode is released. Note that this is different
  32  * from ext3_file_open: open gets called at every open, but release
  33  * gets called only when /all/ the files are closed.
  34  */
  35 static int ext3_release_file (struct inode * inode, struct file * filp)
  36 {
  37         if (ext3_test_inode_state(inode, EXT3_STATE_FLUSH_ON_CLOSE)) {
  38                 filemap_flush(inode->i_mapping);
  39                 ext3_clear_inode_state(inode, EXT3_STATE_FLUSH_ON_CLOSE);
  40         }
  41         /* if we are the last writer on the inode, drop the block reservation */
  42         if ((filp->f_mode & FMODE_WRITE) &&
  43                         (atomic_read(&inode->i_writecount) == 1))
  44         {
  45                 mutex_lock(&EXT3_I(inode)->truncate_mutex);
  46                 ext3_discard_reservation(inode);
  47                 mutex_unlock(&EXT3_I(inode)->truncate_mutex);
  48         }
  49         if (is_dx(inode) && filp->private_data)
  50                 ext3_htree_free_dir_info(filp->private_data);
  51
  52         return 0;
  53 }
  54
  55 const struct file_operations ext3_file_operations = {
  56         .llseek         = generic_file_llseek,
  57         .read           = do_sync_read,
  58         .write          = do_sync_write,
  59         .aio_read       = generic_file_aio_read,
  60         .aio_write      = generic_file_aio_write,
  61         .unlocked_ioctl = ext3_ioctl,
  62 #ifdef CONFIG_COMPAT
  63         .compat_ioctl   = ext3_compat_ioctl,
  64 #endif
  65         .mmap           = generic_file_mmap,
  66         .open           = dquot_file_open,
  67         .release        = ext3_release_file,
  68         .fsync          = ext3_sync_file,
  69         .splice_read    = generic_file_splice_read,
  70         .splice_write   = generic_file_splice_write,
  71 };
  72
  73 const struct inode_operations ext3_file_inode_operations = {
  74         .truncate       = ext3_truncate,
  75         .setattr        = ext3_setattr,
  76 #ifdef CONFIG_EXT3_FS_XATTR
  77         .setxattr       = generic_setxattr,
  78         .getxattr       = generic_getxattr,
  79         .listxattr      = ext3_listxattr,
  80         .removexattr    = generic_removexattr,
  81 #endif
  82         .check_acl      = ext3_check_acl,
  83         .fiemap         = ext3_fiemap,
  84 };
  85