02c24a8218
Btrfs needs to be able to control how filemap_write_and_wait_range() is called in fsync to make it less of a painful operation, so push down taking i_mutex and the calling of filemap_write_and_wait() down into the ->fsync() handlers. Some file systems can drop taking the i_mutex altogether it seems, like ext3 and ocfs2. For correctness sake I just pushed everything down in all cases to make sure that we keep the current behavior the same for everybody, and then each individual fs maintainer can make up their mind about what to do from there. Thanks, Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
86 lines
2.5 KiB
C
86 lines
2.5 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, loff_t start, loff_t end,
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int datasync)
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{
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struct inode *inode = filp->f_mapping->host;
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int ret;
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ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
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if (ret)
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return ret;
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mutex_lock(&inode->i_mutex);
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ret = sync_inode_metadata(filp->f_mapping->host, 1);
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mutex_unlock(&inode->i_mutex);
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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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