Revision ed1cde68365c1251b920900c51e73675ff38dc66 authored by Al Viro on 20 September 2010, 14:13:25 UTC, committed by Linus Torvalds on 20 September 2010, 17:44:38 UTC
We need to make sure that only the first do_signal() to be handled on the way out syscall will bother with syscall restarts; additionally, the check on the "signal has user handler" path had been wrong - compare with restart prevention in sigreturn()... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 44c7aff
gcdat.c
/*
* gcdat.c - NILFS shadow DAT inode for GC
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Written by Seiji Kihara <kihara@osrg.net>, Amagai Yoshiji <amagai@osrg.net>,
* and Ryusuke Konishi <ryusuke@osrg.net>.
*
*/
#include <linux/buffer_head.h>
#include "nilfs.h"
#include "page.h"
#include "mdt.h"
int nilfs_init_gcdat_inode(struct the_nilfs *nilfs)
{
struct inode *dat = nilfs->ns_dat, *gcdat = nilfs->ns_gc_dat;
struct nilfs_inode_info *dii = NILFS_I(dat), *gii = NILFS_I(gcdat);
int err;
gcdat->i_state = 0;
gcdat->i_blocks = dat->i_blocks;
gii->i_flags = dii->i_flags;
gii->i_state = dii->i_state | (1 << NILFS_I_GCDAT);
gii->i_cno = 0;
nilfs_bmap_init_gcdat(gii->i_bmap, dii->i_bmap);
err = nilfs_copy_dirty_pages(gcdat->i_mapping, dat->i_mapping);
if (unlikely(err))
return err;
return nilfs_copy_dirty_pages(&gii->i_btnode_cache,
&dii->i_btnode_cache);
}
void nilfs_commit_gcdat_inode(struct the_nilfs *nilfs)
{
struct inode *dat = nilfs->ns_dat, *gcdat = nilfs->ns_gc_dat;
struct nilfs_inode_info *dii = NILFS_I(dat), *gii = NILFS_I(gcdat);
struct address_space *mapping = dat->i_mapping;
struct address_space *gmapping = gcdat->i_mapping;
down_write(&NILFS_MDT(dat)->mi_sem);
dat->i_blocks = gcdat->i_blocks;
dii->i_flags = gii->i_flags;
dii->i_state = gii->i_state & ~(1 << NILFS_I_GCDAT);
nilfs_bmap_commit_gcdat(gii->i_bmap, dii->i_bmap);
nilfs_palloc_clear_cache(dat);
nilfs_palloc_clear_cache(gcdat);
nilfs_clear_dirty_pages(mapping);
nilfs_copy_back_pages(mapping, gmapping);
/* note: mdt dirty flags should be cleared by segctor. */
nilfs_clear_dirty_pages(&dii->i_btnode_cache);
nilfs_copy_back_pages(&dii->i_btnode_cache, &gii->i_btnode_cache);
up_write(&NILFS_MDT(dat)->mi_sem);
}
void nilfs_clear_gcdat_inode(struct the_nilfs *nilfs)
{
struct inode *gcdat = nilfs->ns_gc_dat;
struct nilfs_inode_info *gii = NILFS_I(gcdat);
gcdat->i_state = I_FREEING | I_CLEAR;
gii->i_flags = 0;
nilfs_palloc_clear_cache(gcdat);
truncate_inode_pages(gcdat->i_mapping, 0);
truncate_inode_pages(&gii->i_btnode_cache, 0);
}
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