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33#include <linux/fs.h>
34#include <linux/buffer_head.h>
35#include <linux/kernel.h>
36
37#include "vxfs.h"
38#include "vxfs_inode.h"
39#include "vxfs_extern.h"
40
41
42#ifdef DIAGNOSTIC
43static void
44vxfs_typdump(struct vxfs_typed *typ)
45{
46 printk(KERN_DEBUG "type=%Lu ", typ->vt_hdr >> VXFS_TYPED_TYPESHIFT);
47 printk("offset=%Lx ", typ->vt_hdr & VXFS_TYPED_OFFSETMASK);
48 printk("block=%x ", typ->vt_block);
49 printk("size=%x\n", typ->vt_size);
50}
51#endif
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63
64
65
66static daddr_t
67vxfs_bmap_ext4(struct inode *ip, long bn)
68{
69 struct super_block *sb = ip->i_sb;
70 struct vxfs_inode_info *vip = VXFS_INO(ip);
71 struct vxfs_sb_info *sbi = VXFS_SBI(sb);
72 unsigned long bsize = sb->s_blocksize;
73 u32 indsize = fs32_to_cpu(sbi, vip->vii_ext4.ve4_indsize);
74 int i;
75
76 if (indsize > sb->s_blocksize)
77 goto fail_size;
78
79 for (i = 0; i < VXFS_NDADDR; i++) {
80 struct direct *d = vip->vii_ext4.ve4_direct + i;
81 if (bn >= 0 && bn < fs32_to_cpu(sbi, d->size))
82 return (bn + fs32_to_cpu(sbi, d->extent));
83 bn -= fs32_to_cpu(sbi, d->size);
84 }
85
86 if ((bn / (indsize * indsize * bsize / 4)) == 0) {
87 struct buffer_head *buf;
88 daddr_t bno;
89 __fs32 *indir;
90
91 buf = sb_bread(sb,
92 fs32_to_cpu(sbi, vip->vii_ext4.ve4_indir[0]));
93 if (!buf || !buffer_mapped(buf))
94 goto fail_buf;
95
96 indir = (__fs32 *)buf->b_data;
97 bno = fs32_to_cpu(sbi, indir[(bn / indsize) % (indsize * bn)]) +
98 (bn % indsize);
99
100 brelse(buf);
101 return bno;
102 } else
103 printk(KERN_WARNING "no matching indir?");
104
105 return 0;
106
107fail_size:
108 printk("vxfs: indirect extent too big!\n");
109fail_buf:
110 return 0;
111}
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129
130static daddr_t
131vxfs_bmap_indir(struct inode *ip, long indir, int size, long block)
132{
133 struct vxfs_sb_info *sbi = VXFS_SBI(ip->i_sb);
134 struct buffer_head *bp = NULL;
135 daddr_t pblock = 0;
136 int i;
137
138 for (i = 0; i < size * VXFS_TYPED_PER_BLOCK(ip->i_sb); i++) {
139 struct vxfs_typed *typ;
140 int64_t off;
141
142 bp = sb_bread(ip->i_sb,
143 indir + (i / VXFS_TYPED_PER_BLOCK(ip->i_sb)));
144 if (!bp || !buffer_mapped(bp))
145 return 0;
146
147 typ = ((struct vxfs_typed *)bp->b_data) +
148 (i % VXFS_TYPED_PER_BLOCK(ip->i_sb));
149 off = fs64_to_cpu(sbi, typ->vt_hdr) & VXFS_TYPED_OFFSETMASK;
150
151 if (block < off) {
152 brelse(bp);
153 continue;
154 }
155
156 switch ((u_int32_t)(fs64_to_cpu(sbi, typ->vt_hdr) >>
157 VXFS_TYPED_TYPESHIFT)) {
158 case VXFS_TYPED_INDIRECT:
159 pblock = vxfs_bmap_indir(ip,
160 fs32_to_cpu(sbi, typ->vt_block),
161 fs32_to_cpu(sbi, typ->vt_size),
162 block - off);
163 if (pblock == -2)
164 break;
165 goto out;
166 case VXFS_TYPED_DATA:
167 if ((block - off) >= fs32_to_cpu(sbi, typ->vt_size))
168 break;
169 pblock = fs32_to_cpu(sbi, typ->vt_block) + block - off;
170 goto out;
171 case VXFS_TYPED_INDIRECT_DEV4:
172 case VXFS_TYPED_DATA_DEV4: {
173 struct vxfs_typed_dev4 *typ4 =
174 (struct vxfs_typed_dev4 *)typ;
175
176 printk(KERN_INFO "\n\nTYPED_DEV4 detected!\n");
177 printk(KERN_INFO "block: %llu\tsize: %lld\tdev: %d\n",
178 fs64_to_cpu(sbi, typ4->vd4_block),
179 fs64_to_cpu(sbi, typ4->vd4_size),
180 fs32_to_cpu(sbi, typ4->vd4_dev));
181 goto fail;
182 }
183 default:
184 printk(KERN_ERR "%s:%d vt_hdr %llu\n", __func__,
185 __LINE__, fs64_to_cpu(sbi, typ->vt_hdr));
186 BUG();
187 }
188 brelse(bp);
189 }
190
191fail:
192 pblock = 0;
193out:
194 brelse(bp);
195 return (pblock);
196}
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208
209static daddr_t
210vxfs_bmap_typed(struct inode *ip, long iblock)
211{
212 struct vxfs_inode_info *vip = VXFS_INO(ip);
213 struct vxfs_sb_info *sbi = VXFS_SBI(ip->i_sb);
214 daddr_t pblock = 0;
215 int i;
216
217 for (i = 0; i < VXFS_NTYPED; i++) {
218 struct vxfs_typed *typ = vip->vii_org.typed + i;
219 u64 hdr = fs64_to_cpu(sbi, typ->vt_hdr);
220 int64_t off = (hdr & VXFS_TYPED_OFFSETMASK);
221
222#ifdef DIAGNOSTIC
223 vxfs_typdump(typ);
224#endif
225 if (iblock < off)
226 continue;
227 switch ((u32)(hdr >> VXFS_TYPED_TYPESHIFT)) {
228 case VXFS_TYPED_INDIRECT:
229 pblock = vxfs_bmap_indir(ip,
230 fs32_to_cpu(sbi, typ->vt_block),
231 fs32_to_cpu(sbi, typ->vt_size),
232 iblock - off);
233 if (pblock == -2)
234 break;
235 return (pblock);
236 case VXFS_TYPED_DATA:
237 if ((iblock - off) < fs32_to_cpu(sbi, typ->vt_size))
238 return (fs32_to_cpu(sbi, typ->vt_block) +
239 iblock - off);
240 break;
241 case VXFS_TYPED_INDIRECT_DEV4:
242 case VXFS_TYPED_DATA_DEV4: {
243 struct vxfs_typed_dev4 *typ4 =
244 (struct vxfs_typed_dev4 *)typ;
245
246 printk(KERN_INFO "\n\nTYPED_DEV4 detected!\n");
247 printk(KERN_INFO "block: %llu\tsize: %lld\tdev: %d\n",
248 fs64_to_cpu(sbi, typ4->vd4_block),
249 fs64_to_cpu(sbi, typ4->vd4_size),
250 fs32_to_cpu(sbi, typ4->vd4_dev));
251 return 0;
252 }
253 default:
254 BUG();
255 }
256 }
257
258 return 0;
259}
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272
273daddr_t
274vxfs_bmap1(struct inode *ip, long iblock)
275{
276 struct vxfs_inode_info *vip = VXFS_INO(ip);
277
278 if (VXFS_ISEXT4(vip))
279 return vxfs_bmap_ext4(ip, iblock);
280 if (VXFS_ISTYPED(vip))
281 return vxfs_bmap_typed(ip, iblock);
282 if (VXFS_ISNONE(vip))
283 goto unsupp;
284 if (VXFS_ISIMMED(vip))
285 goto unsupp;
286
287 printk(KERN_WARNING "vxfs: inode %ld has no valid orgtype (%x)\n",
288 ip->i_ino, vip->vii_orgtype);
289 BUG();
290
291unsupp:
292 printk(KERN_WARNING "vxfs: inode %ld has an unsupported orgtype (%x)\n",
293 ip->i_ino, vip->vii_orgtype);
294 return 0;
295}
296