96 строки
2.7 KiB
C
96 строки
2.7 KiB
C
/*
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* Copyright (C) 2005, 2006
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* Avishay Traeger (avishay@gmail.com)
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* Copyright (C) 2008, 2009
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* Boaz Harrosh <bharrosh@panasas.com>
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*
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* Copyrights for code taken from ext2:
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* Copyright (C) 1992, 1993, 1994, 1995
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* Remy Card (card@masi.ibp.fr)
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* Laboratoire MASI - Institut Blaise Pascal
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* Universite Pierre et Marie Curie (Paris VI)
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* from
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* linux/fs/minix/inode.c
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* Copyright (C) 1991, 1992 Linus Torvalds
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*
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* This file is part of exofs.
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*
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* exofs is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation. Since it is based on ext2, and the only
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* valid version of GPL for the Linux kernel is version 2, the only valid
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* version of GPL for exofs is version 2.
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*
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* exofs is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with exofs; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "exofs.h"
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static int exofs_release_file(struct inode *inode, struct file *filp)
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{
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return 0;
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}
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/* exofs_file_fsync - flush the inode to disk
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*
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* Note, in exofs all metadata is written as part of inode, regardless.
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* The writeout is synchronous
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*/
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static int exofs_file_fsync(struct file *filp, int datasync)
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{
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int ret;
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struct inode *inode = filp->f_mapping->host;
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struct writeback_control wbc = {
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.sync_mode = WB_SYNC_ALL,
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.nr_to_write = 0, /* metadata-only; caller takes care of data */
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};
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struct super_block *sb;
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if (!(inode->i_state & I_DIRTY))
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return 0;
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if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
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return 0;
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ret = sync_inode(inode, &wbc);
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/* This is a good place to write the sb */
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/* TODO: Sechedule an sb-sync on create */
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sb = inode->i_sb;
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if (sb->s_dirt)
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exofs_sync_fs(sb, 1);
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return ret;
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}
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static int exofs_flush(struct file *file, fl_owner_t id)
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{
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int ret = vfs_fsync(file, 0);
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/* TODO: Flush the OSD target */
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return ret;
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}
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const struct file_operations exofs_file_operations = {
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.llseek = generic_file_llseek,
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.read = do_sync_read,
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.write = do_sync_write,
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.aio_read = generic_file_aio_read,
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.aio_write = generic_file_aio_write,
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.mmap = generic_file_mmap,
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.open = generic_file_open,
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.release = exofs_release_file,
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.fsync = exofs_file_fsync,
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.flush = exofs_flush,
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.splice_read = generic_file_splice_read,
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.splice_write = generic_file_splice_write,
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};
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const struct inode_operations exofs_file_inode_operations = {
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.setattr = exofs_setattr,
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};
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