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-rw-r--r--fs/gfs2/ops_vm.c169
1 files changed, 0 insertions, 169 deletions
diff --git a/fs/gfs2/ops_vm.c b/fs/gfs2/ops_vm.c
deleted file mode 100644
index 927d739d4685..000000000000
--- a/fs/gfs2/ops_vm.c
+++ /dev/null
@@ -1,169 +0,0 @@
1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
4 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
8 */
9
10#include <linux/slab.h>
11#include <linux/spinlock.h>
12#include <linux/completion.h>
13#include <linux/buffer_head.h>
14#include <linux/mm.h>
15#include <linux/pagemap.h>
16#include <linux/gfs2_ondisk.h>
17#include <linux/lm_interface.h>
18
19#include "gfs2.h"
20#include "incore.h"
21#include "bmap.h"
22#include "glock.h"
23#include "inode.h"
24#include "ops_vm.h"
25#include "quota.h"
26#include "rgrp.h"
27#include "trans.h"
28#include "util.h"
29
30static int gfs2_private_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
31{
32 struct gfs2_inode *ip = GFS2_I(vma->vm_file->f_mapping->host);
33
34 set_bit(GIF_PAGED, &ip->i_flags);
35 return filemap_fault(vma, vmf);
36}
37
38static int alloc_page_backing(struct gfs2_inode *ip, struct page *page)
39{
40 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
41 unsigned long index = page->index;
42 u64 lblock = index << (PAGE_CACHE_SHIFT -
43 sdp->sd_sb.sb_bsize_shift);
44 unsigned int blocks = PAGE_CACHE_SIZE >> sdp->sd_sb.sb_bsize_shift;
45 struct gfs2_alloc *al;
46 unsigned int data_blocks, ind_blocks;
47 unsigned int x;
48 int error;
49
50 al = gfs2_alloc_get(ip);
51
52 error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
53 if (error)
54 goto out;
55
56 error = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid);
57 if (error)
58 goto out_gunlock_q;
59
60 gfs2_write_calc_reserv(ip, PAGE_CACHE_SIZE, &data_blocks, &ind_blocks);
61
62 al->al_requested = data_blocks + ind_blocks;
63
64 error = gfs2_inplace_reserve(ip);
65 if (error)
66 goto out_gunlock_q;
67
68 error = gfs2_trans_begin(sdp, al->al_rgd->rd_length +
69 ind_blocks + RES_DINODE +
70 RES_STATFS + RES_QUOTA, 0);
71 if (error)
72 goto out_ipres;
73
74 if (gfs2_is_stuffed(ip)) {
75 error = gfs2_unstuff_dinode(ip, NULL);
76 if (error)
77 goto out_trans;
78 }
79
80 for (x = 0; x < blocks; ) {
81 u64 dblock;
82 unsigned int extlen;
83 int new = 1;
84
85 error = gfs2_extent_map(&ip->i_inode, lblock, &new, &dblock, &extlen);
86 if (error)
87 goto out_trans;
88
89 lblock += extlen;
90 x += extlen;
91 }
92
93 gfs2_assert_warn(sdp, al->al_alloced);
94
95out_trans:
96 gfs2_trans_end(sdp);
97out_ipres:
98 gfs2_inplace_release(ip);
99out_gunlock_q:
100 gfs2_quota_unlock(ip);
101out:
102 gfs2_alloc_put(ip);
103 return error;
104}
105
106static int gfs2_sharewrite_fault(struct vm_area_struct *vma,
107 struct vm_fault *vmf)
108{
109 struct file *file = vma->vm_file;
110 struct gfs2_file *gf = file->private_data;
111 struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
112 struct gfs2_holder i_gh;
113 int alloc_required;
114 int error;
115 int ret = 0;
116
117 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
118 if (error)
119 goto out;
120
121 set_bit(GIF_PAGED, &ip->i_flags);
122 set_bit(GIF_SW_PAGED, &ip->i_flags);
123
124 error = gfs2_write_alloc_required(ip,
125 (u64)vmf->pgoff << PAGE_CACHE_SHIFT,
126 PAGE_CACHE_SIZE, &alloc_required);
127 if (error) {
128 ret = VM_FAULT_OOM; /* XXX: are these right? */
129 goto out_unlock;
130 }
131
132 set_bit(GFF_EXLOCK, &gf->f_flags);
133 ret = filemap_fault(vma, vmf);
134 clear_bit(GFF_EXLOCK, &gf->f_flags);
135 if (ret & VM_FAULT_ERROR)
136 goto out_unlock;
137
138 if (alloc_required) {
139 /* XXX: do we need to drop page lock around alloc_page_backing?*/
140 error = alloc_page_backing(ip, vmf->page);
141 if (error) {
142 /*
143 * VM_FAULT_LOCKED should always be the case for
144 * filemap_fault, but it may not be in a future
145 * implementation.
146 */
147 if (ret & VM_FAULT_LOCKED)
148 unlock_page(vmf->page);
149 page_cache_release(vmf->page);
150 ret = VM_FAULT_OOM;
151 goto out_unlock;
152 }
153 set_page_dirty(vmf->page);
154 }
155
156out_unlock:
157 gfs2_glock_dq_uninit(&i_gh);
158out:
159 return ret;
160}
161
162struct vm_operations_struct gfs2_vm_ops_private = {
163 .fault = gfs2_private_fault,
164};
165
166struct vm_operations_struct gfs2_vm_ops_sharewrite = {
167 .fault = gfs2_sharewrite_fault,
168};
169