diff options
Diffstat (limited to 'fs/gfs2/ops_vm.c')
-rw-r--r-- | fs/gfs2/ops_vm.c | 169 |
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 | |||
30 | static 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 | |||
38 | static 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 | |||
95 | out_trans: | ||
96 | gfs2_trans_end(sdp); | ||
97 | out_ipres: | ||
98 | gfs2_inplace_release(ip); | ||
99 | out_gunlock_q: | ||
100 | gfs2_quota_unlock(ip); | ||
101 | out: | ||
102 | gfs2_alloc_put(ip); | ||
103 | return error; | ||
104 | } | ||
105 | |||
106 | static 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 | |||
156 | out_unlock: | ||
157 | gfs2_glock_dq_uninit(&i_gh); | ||
158 | out: | ||
159 | return ret; | ||
160 | } | ||
161 | |||
162 | struct vm_operations_struct gfs2_vm_ops_private = { | ||
163 | .fault = gfs2_private_fault, | ||
164 | }; | ||
165 | |||
166 | struct vm_operations_struct gfs2_vm_ops_sharewrite = { | ||
167 | .fault = gfs2_sharewrite_fault, | ||
168 | }; | ||
169 | |||