/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License v.2.
+ * of the GNU General Public License version 2.
*/
-#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/mm.h>
#include <linux/pagemap.h>
#include <linux/gfs2_ondisk.h>
+#include <linux/lm_interface.h>
#include "gfs2.h"
-#include "lm_interface.h"
#include "incore.h"
#include "bmap.h"
#include "glock.h"
#include "inode.h"
#include "ops_vm.h"
-#include "page.h"
#include "quota.h"
#include "rgrp.h"
#include "trans.h"
#include "util.h"
-static void pfault_be_greedy(struct gfs2_inode *ip)
+static int gfs2_private_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
- unsigned int time;
-
- spin_lock(&ip->i_spin);
- time = ip->i_greedy;
- ip->i_last_pfault = jiffies;
- spin_unlock(&ip->i_spin);
-
- gfs2_inode_hold(ip);
- if (gfs2_glock_be_greedy(ip->i_gl, time))
- gfs2_inode_put(ip);
-}
-
-static struct page *gfs2_private_nopage(struct vm_area_struct *area,
- unsigned long address, int *type)
-{
- struct gfs2_inode *ip = area->vm_file->f_mapping->host->u.generic_ip;
- struct gfs2_holder i_gh;
- struct page *result;
- int error;
-
- error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
- if (error)
- return NULL;
+ struct gfs2_inode *ip = GFS2_I(vma->vm_file->f_mapping->host);
set_bit(GIF_PAGED, &ip->i_flags);
-
- result = filemap_nopage(area, address, type);
-
- if (result && result != NOPAGE_OOM)
- pfault_be_greedy(ip);
-
- gfs2_glock_dq_uninit(&i_gh);
-
- return result;
+ return filemap_fault(vma, vmf);
}
static int alloc_page_backing(struct gfs2_inode *ip, struct page *page)
{
- struct gfs2_sbd *sdp = ip->i_sbd;
+ struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
unsigned long index = page->index;
- uint64_t lblock = index << (PAGE_CACHE_SHIFT -
+ u64 lblock = index << (PAGE_CACHE_SHIFT -
sdp->sd_sb.sb_bsize_shift);
unsigned int blocks = PAGE_CACHE_SIZE >> sdp->sd_sb.sb_bsize_shift;
struct gfs2_alloc *al;
if (error)
goto out;
- error = gfs2_quota_check(ip, ip->i_di.di_uid, ip->i_di.di_gid);
+ error = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid);
if (error)
goto out_gunlock_q;
if (error)
goto out_gunlock_q;
- error = gfs2_trans_begin(sdp, al->al_rgd->rd_ri.ri_length +
+ error = gfs2_trans_begin(sdp, al->al_rgd->rd_length +
ind_blocks + RES_DINODE +
RES_STATFS + RES_QUOTA, 0);
if (error)
goto out_ipres;
if (gfs2_is_stuffed(ip)) {
- error = gfs2_unstuff_dinode(ip, gfs2_unstuffer_page, NULL);
+ error = gfs2_unstuff_dinode(ip, NULL);
if (error)
goto out_trans;
}
for (x = 0; x < blocks; ) {
- uint64_t dblock;
+ u64 dblock;
unsigned int extlen;
int new = 1;
- error = gfs2_extent_map(ip->i_vnode, lblock, &new, &dblock, &extlen);
+ error = gfs2_extent_map(&ip->i_inode, lblock, &new, &dblock, &extlen);
if (error)
goto out_trans;
gfs2_assert_warn(sdp, al->al_alloced);
- out_trans:
+out_trans:
gfs2_trans_end(sdp);
-
- out_ipres:
+out_ipres:
gfs2_inplace_release(ip);
-
- out_gunlock_q:
+out_gunlock_q:
gfs2_quota_unlock(ip);
-
- out:
+out:
gfs2_alloc_put(ip);
-
return error;
}
-static struct page *gfs2_sharewrite_nopage(struct vm_area_struct *area,
- unsigned long address, int *type)
+static int gfs2_sharewrite_fault(struct vm_area_struct *vma,
+ struct vm_fault *vmf)
{
- struct gfs2_inode *ip = area->vm_file->f_mapping->host->u.generic_ip;
+ struct file *file = vma->vm_file;
+ struct gfs2_file *gf = file->private_data;
+ struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
struct gfs2_holder i_gh;
- struct page *result = NULL;
- unsigned long index = ((address - area->vm_start) >> PAGE_CACHE_SHIFT) +
- area->vm_pgoff;
int alloc_required;
int error;
+ int ret = VM_FAULT_MINOR;
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
if (error)
- return NULL;
+ goto out;
set_bit(GIF_PAGED, &ip->i_flags);
set_bit(GIF_SW_PAGED, &ip->i_flags);
error = gfs2_write_alloc_required(ip,
- (uint64_t)index << PAGE_CACHE_SHIFT,
- PAGE_CACHE_SIZE, &alloc_required);
- if (error)
- goto out;
+ (u64)vmf->pgoff << PAGE_CACHE_SHIFT,
+ PAGE_CACHE_SIZE, &alloc_required);
+ if (error) {
+ ret = VM_FAULT_OOM; /* XXX: are these right? */
+ goto out_unlock;
+ }
- result = filemap_nopage(area, address, type);
- if (!result || result == NOPAGE_OOM)
- goto out;
+ set_bit(GFF_EXLOCK, &gf->f_flags);
+ ret = filemap_fault(vma, vmf);
+ clear_bit(GFF_EXLOCK, &gf->f_flags);
+ if (ret & (VM_FAULT_ERROR | FAULT_RET_NOPAGE))
+ goto out_unlock;
if (alloc_required) {
- error = alloc_page_backing(ip, result);
+ /* XXX: do we need to drop page lock around alloc_page_backing?*/
+ error = alloc_page_backing(ip, vmf->page);
if (error) {
- page_cache_release(result);
- result = NULL;
- goto out;
+ if (ret & FAULT_RET_LOCKED)
+ unlock_page(vmf->page);
+ page_cache_release(vmf->page);
+ ret = VM_FAULT_OOM;
+ goto out_unlock;
}
- set_page_dirty(result);
+ set_page_dirty(vmf->page);
}
- pfault_be_greedy(ip);
-
- out:
+out_unlock:
gfs2_glock_dq_uninit(&i_gh);
-
- return result;
+out:
+ return ret;
}
struct vm_operations_struct gfs2_vm_ops_private = {
- .nopage = gfs2_private_nopage,
+ .fault = gfs2_private_fault,
};
struct vm_operations_struct gfs2_vm_ops_sharewrite = {
- .nopage = gfs2_sharewrite_nopage,
+ .fault = gfs2_sharewrite_fault,
};
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff