fs/exofs/file.c

   1 /*
   2  * Copyright (C) 2005, 2006
   3  * Avishay Traeger (avishay@gmail.com)
   4  * Copyright (C) 2008, 2009
   5  * Boaz Harrosh <bharrosh@panasas.com>
   6  *
   7  * Copyrights for code taken from ext2:
   8  *     Copyright (C) 1992, 1993, 1994, 1995
   9  *     Remy Card (card@masi.ibp.fr)
  10  *     Laboratoire MASI - Institut Blaise Pascal
  11  *     Universite Pierre et Marie Curie (Paris VI)
  12  *     from
  13  *     linux/fs/minix/inode.c
  14  *     Copyright (C) 1991, 1992  Linus Torvalds
  15  *
  16  * This file is part of exofs.
  17  *
  18  * exofs is free software; you can redistribute it and/or modify
  19  * it under the terms of the GNU General Public License as published by
  20  * the Free Software Foundation.  Since it is based on ext2, and the only
  21  * valid version of GPL for the Linux kernel is version 2, the only valid
  22  * version of GPL for exofs is version 2.
  23  *
  24  * exofs is distributed in the hope that it will be useful,
  25  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  26  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27  * GNU General Public License for more details.
  28  *
  29  * You should have received a copy of the GNU General Public License
  30  * along with exofs; if not, write to the Free Software
  31  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  32  */
  33
  34 #include <linux/buffer_head.h>
  35
  36 #include "exofs.h"
  37
  38 static int exofs_release_file(struct inode *inode, struct file *filp)
  39 {
  40         return 0;
  41 }
  42
  43 static int exofs_file_fsync(struct file *filp, int datasync)
  44 {
  45         int ret;
  46         struct address_space *mapping = filp->f_mapping;
  47         struct inode *inode = mapping->host;
  48         struct super_block *sb;
  49
  50         ret = filemap_write_and_wait(mapping);
  51         if (ret)
  52                 return ret;
  53
  54         /* sync the inode attributes */
  55         ret = write_inode_now(inode, 1);
  56
  57         /* This is a good place to write the sb */
  58         /* TODO: Sechedule an sb-sync on create */
  59         sb = inode->i_sb;
  60         if (sb->s_dirt)
  61                 exofs_sync_fs(sb, 1);
  62
  63         return ret;
  64 }
  65
  66 static int exofs_flush(struct file *file, fl_owner_t id)
  67 {
  68         exofs_file_fsync(file, 1);
  69         /* TODO: Flush the OSD target */
  70         return 0;
  71 }
  72
  73 const struct file_operations exofs_file_operations = {
  74         .llseek         = generic_file_llseek,
  75         .read           = do_sync_read,
  76         .write          = do_sync_write,
  77         .aio_read       = generic_file_aio_read,
  78         .aio_write      = generic_file_aio_write,
  79         .mmap           = generic_file_mmap,
  80         .open           = generic_file_open,
  81         .release        = exofs_release_file,
  82         .fsync          = exofs_file_fsync,
  83         .flush          = exofs_flush,
  84         .splice_read    = generic_file_splice_read,
  85         .splice_write   = generic_file_splice_write,
  86 };
  87
  88 const struct inode_operations exofs_file_inode_operations = {
  89         .truncate       = exofs_truncate,
  90         .setattr        = exofs_setattr,
  91 };