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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * Copyright (C) International Business Machines Corp., 2000-2004 | |
1da177e4 LT |
4 | */ |
5 | ||
6 | /* | |
7 | * jfs_imap.c: inode allocation map manager | |
8 | * | |
9 | * Serialization: | |
10 | * Each AG has a simple lock which is used to control the serialization of | |
11 | * the AG level lists. This lock should be taken first whenever an AG | |
12 | * level list will be modified or accessed. | |
13 | * | |
14 | * Each IAG is locked by obtaining the buffer for the IAG page. | |
15 | * | |
16 | * There is also a inode lock for the inode map inode. A read lock needs to | |
17 | * be taken whenever an IAG is read from the map or the global level | |
18 | * information is read. A write lock needs to be taken whenever the global | |
19 | * level information is modified or an atomic operation needs to be used. | |
20 | * | |
21 | * If more than one IAG is read at one time, the read lock may not | |
22 | * be given up until all of the IAG's are read. Otherwise, a deadlock | |
23 | * may occur when trying to obtain the read lock while another thread | |
24 | * holding the read lock is waiting on the IAG already being held. | |
25 | * | |
26 | * The control page of the inode map is read into memory by diMount(). | |
27 | * Thereafter it should only be modified in memory and then it will be | |
28 | * written out when the filesystem is unmounted by diUnmount(). | |
29 | */ | |
30 | ||
31 | #include <linux/fs.h> | |
32 | #include <linux/buffer_head.h> | |
33 | #include <linux/pagemap.h> | |
34 | #include <linux/quotaops.h> | |
5a0e3ad6 | 35 | #include <linux/slab.h> |
1da177e4 LT |
36 | |
37 | #include "jfs_incore.h" | |
1868f4aa | 38 | #include "jfs_inode.h" |
1da177e4 LT |
39 | #include "jfs_filsys.h" |
40 | #include "jfs_dinode.h" | |
41 | #include "jfs_dmap.h" | |
42 | #include "jfs_imap.h" | |
43 | #include "jfs_metapage.h" | |
44 | #include "jfs_superblock.h" | |
45 | #include "jfs_debug.h" | |
46 | ||
47 | /* | |
48 | * imap locks | |
49 | */ | |
50 | /* iag free list lock */ | |
1de87444 IM |
51 | #define IAGFREE_LOCK_INIT(imap) mutex_init(&imap->im_freelock) |
52 | #define IAGFREE_LOCK(imap) mutex_lock(&imap->im_freelock) | |
53 | #define IAGFREE_UNLOCK(imap) mutex_unlock(&imap->im_freelock) | |
1da177e4 LT |
54 | |
55 | /* per ag iag list locks */ | |
1de87444 IM |
56 | #define AG_LOCK_INIT(imap,index) mutex_init(&(imap->im_aglock[index])) |
57 | #define AG_LOCK(imap,agno) mutex_lock(&imap->im_aglock[agno]) | |
58 | #define AG_UNLOCK(imap,agno) mutex_unlock(&imap->im_aglock[agno]) | |
1da177e4 | 59 | |
1da177e4 LT |
60 | /* |
61 | * forward references | |
62 | */ | |
4d81715f RK |
63 | static int diAllocAG(struct inomap *, int, bool, struct inode *); |
64 | static int diAllocAny(struct inomap *, int, bool, struct inode *); | |
1da177e4 LT |
65 | static int diAllocBit(struct inomap *, struct iag *, int); |
66 | static int diAllocExt(struct inomap *, int, struct inode *); | |
67 | static int diAllocIno(struct inomap *, int, struct inode *); | |
68 | static int diFindFree(u32, int); | |
69 | static int diNewExt(struct inomap *, struct iag *, int); | |
70 | static int diNewIAG(struct inomap *, int *, int, struct metapage **); | |
71 | static void duplicateIXtree(struct super_block *, s64, int, s64 *); | |
72 | ||
73 | static int diIAGRead(struct inomap * imap, int, struct metapage **); | |
74 | static int copy_from_dinode(struct dinode *, struct inode *); | |
75 | static void copy_to_dinode(struct dinode *, struct inode *); | |
76 | ||
1da177e4 | 77 | /* |
f720e3ba | 78 | * NAME: diMount() |
1da177e4 | 79 | * |
f720e3ba | 80 | * FUNCTION: initialize the incore inode map control structures for |
1da177e4 LT |
81 | * a fileset or aggregate init time. |
82 | * | |
f720e3ba DK |
83 | * the inode map's control structure (dinomap) is |
84 | * brought in from disk and placed in virtual memory. | |
1da177e4 LT |
85 | * |
86 | * PARAMETERS: | |
f720e3ba | 87 | * ipimap - pointer to inode map inode for the aggregate or fileset. |
1da177e4 LT |
88 | * |
89 | * RETURN VALUES: | |
f720e3ba DK |
90 | * 0 - success |
91 | * -ENOMEM - insufficient free virtual memory. | |
92 | * -EIO - i/o error. | |
1da177e4 LT |
93 | */ |
94 | int diMount(struct inode *ipimap) | |
95 | { | |
96 | struct inomap *imap; | |
97 | struct metapage *mp; | |
98 | int index; | |
99 | struct dinomap_disk *dinom_le; | |
100 | ||
101 | /* | |
102 | * allocate/initialize the in-memory inode map control structure | |
103 | */ | |
104 | /* allocate the in-memory inode map control structure. */ | |
5cbded58 | 105 | imap = kmalloc(sizeof(struct inomap), GFP_KERNEL); |
e15a56b7 | 106 | if (imap == NULL) |
1da177e4 | 107 | return -ENOMEM; |
1da177e4 LT |
108 | |
109 | /* read the on-disk inode map control structure. */ | |
110 | ||
111 | mp = read_metapage(ipimap, | |
112 | IMAPBLKNO << JFS_SBI(ipimap->i_sb)->l2nbperpage, | |
113 | PSIZE, 0); | |
114 | if (mp == NULL) { | |
115 | kfree(imap); | |
116 | return -EIO; | |
117 | } | |
118 | ||
119 | /* copy the on-disk version to the in-memory version. */ | |
120 | dinom_le = (struct dinomap_disk *) mp->data; | |
121 | imap->im_freeiag = le32_to_cpu(dinom_le->in_freeiag); | |
122 | imap->im_nextiag = le32_to_cpu(dinom_le->in_nextiag); | |
123 | atomic_set(&imap->im_numinos, le32_to_cpu(dinom_le->in_numinos)); | |
124 | atomic_set(&imap->im_numfree, le32_to_cpu(dinom_le->in_numfree)); | |
125 | imap->im_nbperiext = le32_to_cpu(dinom_le->in_nbperiext); | |
126 | imap->im_l2nbperiext = le32_to_cpu(dinom_le->in_l2nbperiext); | |
127 | for (index = 0; index < MAXAG; index++) { | |
128 | imap->im_agctl[index].inofree = | |
129 | le32_to_cpu(dinom_le->in_agctl[index].inofree); | |
130 | imap->im_agctl[index].extfree = | |
131 | le32_to_cpu(dinom_le->in_agctl[index].extfree); | |
132 | imap->im_agctl[index].numinos = | |
133 | le32_to_cpu(dinom_le->in_agctl[index].numinos); | |
134 | imap->im_agctl[index].numfree = | |
135 | le32_to_cpu(dinom_le->in_agctl[index].numfree); | |
136 | } | |
137 | ||
138 | /* release the buffer. */ | |
139 | release_metapage(mp); | |
140 | ||
141 | /* | |
142 | * allocate/initialize inode allocation map locks | |
143 | */ | |
144 | /* allocate and init iag free list lock */ | |
145 | IAGFREE_LOCK_INIT(imap); | |
146 | ||
147 | /* allocate and init ag list locks */ | |
148 | for (index = 0; index < MAXAG; index++) { | |
149 | AG_LOCK_INIT(imap, index); | |
150 | } | |
151 | ||
152 | /* bind the inode map inode and inode map control structure | |
153 | * to each other. | |
154 | */ | |
155 | imap->im_ipimap = ipimap; | |
156 | JFS_IP(ipimap)->i_imap = imap; | |
157 | ||
1da177e4 LT |
158 | return (0); |
159 | } | |
160 | ||
161 | ||
162 | /* | |
f720e3ba | 163 | * NAME: diUnmount() |
1da177e4 | 164 | * |
f720e3ba | 165 | * FUNCTION: write to disk the incore inode map control structures for |
1da177e4 LT |
166 | * a fileset or aggregate at unmount time. |
167 | * | |
168 | * PARAMETERS: | |
f720e3ba | 169 | * ipimap - pointer to inode map inode for the aggregate or fileset. |
1da177e4 LT |
170 | * |
171 | * RETURN VALUES: | |
f720e3ba DK |
172 | * 0 - success |
173 | * -ENOMEM - insufficient free virtual memory. | |
174 | * -EIO - i/o error. | |
1da177e4 LT |
175 | */ |
176 | int diUnmount(struct inode *ipimap, int mounterror) | |
177 | { | |
178 | struct inomap *imap = JFS_IP(ipimap)->i_imap; | |
179 | ||
180 | /* | |
181 | * update the on-disk inode map control structure | |
182 | */ | |
183 | ||
184 | if (!(mounterror || isReadOnly(ipimap))) | |
185 | diSync(ipimap); | |
186 | ||
187 | /* | |
188 | * Invalidate the page cache buffers | |
189 | */ | |
190 | truncate_inode_pages(ipimap->i_mapping, 0); | |
191 | ||
192 | /* | |
193 | * free in-memory control structure | |
194 | */ | |
195 | kfree(imap); | |
6e2bda2c | 196 | JFS_IP(ipimap)->i_imap = NULL; |
1da177e4 LT |
197 | |
198 | return (0); | |
199 | } | |
200 | ||
201 | ||
202 | /* | |
203 | * diSync() | |
204 | */ | |
205 | int diSync(struct inode *ipimap) | |
206 | { | |
207 | struct dinomap_disk *dinom_le; | |
208 | struct inomap *imp = JFS_IP(ipimap)->i_imap; | |
209 | struct metapage *mp; | |
210 | int index; | |
211 | ||
212 | /* | |
213 | * write imap global conrol page | |
214 | */ | |
215 | /* read the on-disk inode map control structure */ | |
216 | mp = get_metapage(ipimap, | |
217 | IMAPBLKNO << JFS_SBI(ipimap->i_sb)->l2nbperpage, | |
218 | PSIZE, 0); | |
219 | if (mp == NULL) { | |
220 | jfs_err("diSync: get_metapage failed!"); | |
221 | return -EIO; | |
222 | } | |
223 | ||
224 | /* copy the in-memory version to the on-disk version */ | |
225 | dinom_le = (struct dinomap_disk *) mp->data; | |
226 | dinom_le->in_freeiag = cpu_to_le32(imp->im_freeiag); | |
227 | dinom_le->in_nextiag = cpu_to_le32(imp->im_nextiag); | |
228 | dinom_le->in_numinos = cpu_to_le32(atomic_read(&imp->im_numinos)); | |
229 | dinom_le->in_numfree = cpu_to_le32(atomic_read(&imp->im_numfree)); | |
230 | dinom_le->in_nbperiext = cpu_to_le32(imp->im_nbperiext); | |
231 | dinom_le->in_l2nbperiext = cpu_to_le32(imp->im_l2nbperiext); | |
232 | for (index = 0; index < MAXAG; index++) { | |
233 | dinom_le->in_agctl[index].inofree = | |
234 | cpu_to_le32(imp->im_agctl[index].inofree); | |
235 | dinom_le->in_agctl[index].extfree = | |
236 | cpu_to_le32(imp->im_agctl[index].extfree); | |
237 | dinom_le->in_agctl[index].numinos = | |
238 | cpu_to_le32(imp->im_agctl[index].numinos); | |
239 | dinom_le->in_agctl[index].numfree = | |
240 | cpu_to_le32(imp->im_agctl[index].numfree); | |
241 | } | |
242 | ||
243 | /* write out the control structure */ | |
244 | write_metapage(mp); | |
245 | ||
246 | /* | |
247 | * write out dirty pages of imap | |
248 | */ | |
28fd1298 | 249 | filemap_write_and_wait(ipimap->i_mapping); |
1da177e4 LT |
250 | |
251 | diWriteSpecial(ipimap, 0); | |
252 | ||
253 | return (0); | |
254 | } | |
255 | ||
256 | ||
257 | /* | |
f720e3ba | 258 | * NAME: diRead() |
1da177e4 | 259 | * |
f720e3ba | 260 | * FUNCTION: initialize an incore inode from disk. |
1da177e4 LT |
261 | * |
262 | * on entry, the specifed incore inode should itself | |
263 | * specify the disk inode number corresponding to the | |
264 | * incore inode (i.e. i_number should be initialized). | |
63f83c9f | 265 | * |
1da177e4 LT |
266 | * this routine handles incore inode initialization for |
267 | * both "special" and "regular" inodes. special inodes | |
268 | * are those required early in the mount process and | |
f720e3ba | 269 | * require special handling since much of the file system |
1da177e4 LT |
270 | * is not yet initialized. these "special" inodes are |
271 | * identified by a NULL inode map inode pointer and are | |
272 | * actually initialized by a call to diReadSpecial(). | |
63f83c9f | 273 | * |
1da177e4 LT |
274 | * for regular inodes, the iag describing the disk inode |
275 | * is read from disk to determine the inode extent address | |
276 | * for the disk inode. with the inode extent address in | |
277 | * hand, the page of the extent that contains the disk | |
278 | * inode is read and the disk inode is copied to the | |
279 | * incore inode. | |
280 | * | |
281 | * PARAMETERS: | |
f720e3ba | 282 | * ip - pointer to incore inode to be initialized from disk. |
1da177e4 LT |
283 | * |
284 | * RETURN VALUES: | |
f720e3ba DK |
285 | * 0 - success |
286 | * -EIO - i/o error. | |
287 | * -ENOMEM - insufficient memory | |
63f83c9f | 288 | * |
1da177e4 LT |
289 | */ |
290 | int diRead(struct inode *ip) | |
291 | { | |
292 | struct jfs_sb_info *sbi = JFS_SBI(ip->i_sb); | |
293 | int iagno, ino, extno, rc; | |
294 | struct inode *ipimap; | |
295 | struct dinode *dp; | |
296 | struct iag *iagp; | |
297 | struct metapage *mp; | |
298 | s64 blkno, agstart; | |
299 | struct inomap *imap; | |
300 | int block_offset; | |
301 | int inodes_left; | |
8f6cff98 | 302 | unsigned long pageno; |
1da177e4 LT |
303 | int rel_inode; |
304 | ||
305 | jfs_info("diRead: ino = %ld", ip->i_ino); | |
306 | ||
307 | ipimap = sbi->ipimap; | |
308 | JFS_IP(ip)->ipimap = ipimap; | |
309 | ||
310 | /* determine the iag number for this inode (number) */ | |
311 | iagno = INOTOIAG(ip->i_ino); | |
312 | ||
313 | /* read the iag */ | |
82d5b9a7 | 314 | IREAD_LOCK(ipimap, RDWRLOCK_IMAP); |
a60dca73 | 315 | imap = JFS_IP(ipimap)->i_imap; |
1da177e4 LT |
316 | rc = diIAGRead(imap, iagno, &mp); |
317 | IREAD_UNLOCK(ipimap); | |
318 | if (rc) { | |
319 | jfs_err("diRead: diIAGRead returned %d", rc); | |
320 | return (rc); | |
321 | } | |
322 | ||
323 | iagp = (struct iag *) mp->data; | |
324 | ||
325 | /* determine inode extent that holds the disk inode */ | |
326 | ino = ip->i_ino & (INOSPERIAG - 1); | |
327 | extno = ino >> L2INOSPEREXT; | |
328 | ||
329 | if ((lengthPXD(&iagp->inoext[extno]) != imap->im_nbperiext) || | |
330 | (addressPXD(&iagp->inoext[extno]) == 0)) { | |
331 | release_metapage(mp); | |
332 | return -ESTALE; | |
333 | } | |
334 | ||
335 | /* get disk block number of the page within the inode extent | |
336 | * that holds the disk inode. | |
337 | */ | |
338 | blkno = INOPBLK(&iagp->inoext[extno], ino, sbi->l2nbperpage); | |
339 | ||
340 | /* get the ag for the iag */ | |
341 | agstart = le64_to_cpu(iagp->agstart); | |
342 | ||
343 | release_metapage(mp); | |
344 | ||
345 | rel_inode = (ino & (INOSPERPAGE - 1)); | |
346 | pageno = blkno >> sbi->l2nbperpage; | |
347 | ||
348 | if ((block_offset = ((u32) blkno & (sbi->nbperpage - 1)))) { | |
349 | /* | |
350 | * OS/2 didn't always align inode extents on page boundaries | |
351 | */ | |
352 | inodes_left = | |
353 | (sbi->nbperpage - block_offset) << sbi->l2niperblk; | |
354 | ||
355 | if (rel_inode < inodes_left) | |
356 | rel_inode += block_offset << sbi->l2niperblk; | |
357 | else { | |
358 | pageno += 1; | |
359 | rel_inode -= inodes_left; | |
360 | } | |
361 | } | |
362 | ||
363 | /* read the page of disk inode */ | |
364 | mp = read_metapage(ipimap, pageno << sbi->l2nbperpage, PSIZE, 1); | |
09aaa749 | 365 | if (!mp) { |
1da177e4 LT |
366 | jfs_err("diRead: read_metapage failed"); |
367 | return -EIO; | |
368 | } | |
369 | ||
59c51591 | 370 | /* locate the disk inode requested */ |
1da177e4 LT |
371 | dp = (struct dinode *) mp->data; |
372 | dp += rel_inode; | |
373 | ||
374 | if (ip->i_ino != le32_to_cpu(dp->di_number)) { | |
eb8630d7 | 375 | jfs_error(ip->i_sb, "i_ino != di_number\n"); |
1da177e4 LT |
376 | rc = -EIO; |
377 | } else if (le32_to_cpu(dp->di_nlink) == 0) | |
378 | rc = -ESTALE; | |
379 | else | |
380 | /* copy the disk inode to the in-memory inode */ | |
381 | rc = copy_from_dinode(dp, ip); | |
382 | ||
383 | release_metapage(mp); | |
384 | ||
385 | /* set the ag for the inode */ | |
d31b53e3 | 386 | JFS_IP(ip)->agstart = agstart; |
1da177e4 LT |
387 | JFS_IP(ip)->active_ag = -1; |
388 | ||
389 | return (rc); | |
390 | } | |
391 | ||
392 | ||
393 | /* | |
f720e3ba | 394 | * NAME: diReadSpecial() |
1da177e4 | 395 | * |
f720e3ba | 396 | * FUNCTION: initialize a 'special' inode from disk. |
1da177e4 LT |
397 | * |
398 | * this routines handles aggregate level inodes. The | |
399 | * inode cache cannot differentiate between the | |
400 | * aggregate inodes and the filesystem inodes, so we | |
401 | * handle these here. We don't actually use the aggregate | |
f720e3ba | 402 | * inode map, since these inodes are at a fixed location |
1da177e4 LT |
403 | * and in some cases the aggregate inode map isn't initialized |
404 | * yet. | |
405 | * | |
406 | * PARAMETERS: | |
f720e3ba | 407 | * sb - filesystem superblock |
1da177e4 LT |
408 | * inum - aggregate inode number |
409 | * secondary - 1 if secondary aggregate inode table | |
410 | * | |
411 | * RETURN VALUES: | |
f720e3ba DK |
412 | * new inode - success |
413 | * NULL - i/o error. | |
1da177e4 LT |
414 | */ |
415 | struct inode *diReadSpecial(struct super_block *sb, ino_t inum, int secondary) | |
416 | { | |
417 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
418 | uint address; | |
419 | struct dinode *dp; | |
420 | struct inode *ip; | |
421 | struct metapage *mp; | |
422 | ||
423 | ip = new_inode(sb); | |
424 | if (ip == NULL) { | |
425 | jfs_err("diReadSpecial: new_inode returned NULL!"); | |
426 | return ip; | |
427 | } | |
428 | ||
429 | if (secondary) { | |
430 | address = addressPXD(&sbi->ait2) >> sbi->l2nbperpage; | |
431 | JFS_IP(ip)->ipimap = sbi->ipaimap2; | |
432 | } else { | |
433 | address = AITBL_OFF >> L2PSIZE; | |
434 | JFS_IP(ip)->ipimap = sbi->ipaimap; | |
435 | } | |
436 | ||
437 | ASSERT(inum < INOSPEREXT); | |
438 | ||
439 | ip->i_ino = inum; | |
440 | ||
441 | address += inum >> 3; /* 8 inodes per 4K page */ | |
442 | ||
443 | /* read the page of fixed disk inode (AIT) in raw mode */ | |
444 | mp = read_metapage(ip, address << sbi->l2nbperpage, PSIZE, 1); | |
445 | if (mp == NULL) { | |
bfe86848 | 446 | set_nlink(ip, 1); /* Don't want iput() deleting it */ |
1da177e4 LT |
447 | iput(ip); |
448 | return (NULL); | |
449 | } | |
450 | ||
451 | /* get the pointer to the disk inode of interest */ | |
452 | dp = (struct dinode *) (mp->data); | |
453 | dp += inum % 8; /* 8 inodes per 4K page */ | |
454 | ||
455 | /* copy on-disk inode to in-memory inode */ | |
456 | if ((copy_from_dinode(dp, ip)) != 0) { | |
457 | /* handle bad return by returning NULL for ip */ | |
bfe86848 | 458 | set_nlink(ip, 1); /* Don't want iput() deleting it */ |
1da177e4 LT |
459 | iput(ip); |
460 | /* release the page */ | |
461 | release_metapage(mp); | |
462 | return (NULL); | |
463 | ||
464 | } | |
465 | ||
7fab479b | 466 | ip->i_mapping->a_ops = &jfs_metapage_aops; |
1da177e4 LT |
467 | mapping_set_gfp_mask(ip->i_mapping, GFP_NOFS); |
468 | ||
469 | /* Allocations to metadata inodes should not affect quotas */ | |
470 | ip->i_flags |= S_NOQUOTA; | |
471 | ||
472 | if ((inum == FILESYSTEM_I) && (JFS_IP(ip)->ipimap == sbi->ipaimap)) { | |
473 | sbi->gengen = le32_to_cpu(dp->di_gengen); | |
474 | sbi->inostamp = le32_to_cpu(dp->di_inostamp); | |
475 | } | |
476 | ||
477 | /* release the page */ | |
478 | release_metapage(mp); | |
479 | ||
5bef9151 | 480 | inode_fake_hash(ip); |
ac17b8b5 | 481 | |
1da177e4 LT |
482 | return (ip); |
483 | } | |
484 | ||
485 | /* | |
f720e3ba | 486 | * NAME: diWriteSpecial() |
1da177e4 | 487 | * |
f720e3ba | 488 | * FUNCTION: Write the special inode to disk |
1da177e4 LT |
489 | * |
490 | * PARAMETERS: | |
f720e3ba | 491 | * ip - special inode |
1da177e4 LT |
492 | * secondary - 1 if secondary aggregate inode table |
493 | * | |
494 | * RETURN VALUES: none | |
495 | */ | |
496 | ||
497 | void diWriteSpecial(struct inode *ip, int secondary) | |
498 | { | |
499 | struct jfs_sb_info *sbi = JFS_SBI(ip->i_sb); | |
500 | uint address; | |
501 | struct dinode *dp; | |
502 | ino_t inum = ip->i_ino; | |
503 | struct metapage *mp; | |
504 | ||
1da177e4 LT |
505 | if (secondary) |
506 | address = addressPXD(&sbi->ait2) >> sbi->l2nbperpage; | |
507 | else | |
508 | address = AITBL_OFF >> L2PSIZE; | |
509 | ||
510 | ASSERT(inum < INOSPEREXT); | |
511 | ||
512 | address += inum >> 3; /* 8 inodes per 4K page */ | |
513 | ||
514 | /* read the page of fixed disk inode (AIT) in raw mode */ | |
515 | mp = read_metapage(ip, address << sbi->l2nbperpage, PSIZE, 1); | |
516 | if (mp == NULL) { | |
6ed71e98 | 517 | jfs_err("diWriteSpecial: failed to read aggregate inode extent!"); |
1da177e4 LT |
518 | return; |
519 | } | |
520 | ||
521 | /* get the pointer to the disk inode of interest */ | |
522 | dp = (struct dinode *) (mp->data); | |
523 | dp += inum % 8; /* 8 inodes per 4K page */ | |
524 | ||
525 | /* copy on-disk inode to in-memory inode */ | |
526 | copy_to_dinode(dp, ip); | |
527 | memcpy(&dp->di_xtroot, &JFS_IP(ip)->i_xtroot, 288); | |
528 | ||
529 | if (inum == FILESYSTEM_I) | |
530 | dp->di_gengen = cpu_to_le32(sbi->gengen); | |
531 | ||
532 | /* write the page */ | |
533 | write_metapage(mp); | |
534 | } | |
535 | ||
536 | /* | |
f720e3ba | 537 | * NAME: diFreeSpecial() |
1da177e4 | 538 | * |
f720e3ba | 539 | * FUNCTION: Free allocated space for special inode |
1da177e4 LT |
540 | */ |
541 | void diFreeSpecial(struct inode *ip) | |
542 | { | |
543 | if (ip == NULL) { | |
544 | jfs_err("diFreeSpecial called with NULL ip!"); | |
545 | return; | |
546 | } | |
28fd1298 | 547 | filemap_write_and_wait(ip->i_mapping); |
1da177e4 LT |
548 | truncate_inode_pages(ip->i_mapping, 0); |
549 | iput(ip); | |
550 | } | |
551 | ||
552 | ||
553 | ||
554 | /* | |
f720e3ba | 555 | * NAME: diWrite() |
1da177e4 | 556 | * |
f720e3ba | 557 | * FUNCTION: write the on-disk inode portion of the in-memory inode |
1da177e4 LT |
558 | * to its corresponding on-disk inode. |
559 | * | |
560 | * on entry, the specifed incore inode should itself | |
561 | * specify the disk inode number corresponding to the | |
562 | * incore inode (i.e. i_number should be initialized). | |
563 | * | |
564 | * the inode contains the inode extent address for the disk | |
565 | * inode. with the inode extent address in hand, the | |
566 | * page of the extent that contains the disk inode is | |
567 | * read and the disk inode portion of the incore inode | |
568 | * is copied to the disk inode. | |
63f83c9f | 569 | * |
1da177e4 LT |
570 | * PARAMETERS: |
571 | * tid - transacation id | |
f720e3ba | 572 | * ip - pointer to incore inode to be written to the inode extent. |
1da177e4 LT |
573 | * |
574 | * RETURN VALUES: | |
f720e3ba DK |
575 | * 0 - success |
576 | * -EIO - i/o error. | |
1da177e4 LT |
577 | */ |
578 | int diWrite(tid_t tid, struct inode *ip) | |
579 | { | |
580 | struct jfs_sb_info *sbi = JFS_SBI(ip->i_sb); | |
581 | struct jfs_inode_info *jfs_ip = JFS_IP(ip); | |
582 | int rc = 0; | |
583 | s32 ino; | |
584 | struct dinode *dp; | |
585 | s64 blkno; | |
586 | int block_offset; | |
587 | int inodes_left; | |
588 | struct metapage *mp; | |
8f6cff98 | 589 | unsigned long pageno; |
1da177e4 LT |
590 | int rel_inode; |
591 | int dioffset; | |
592 | struct inode *ipimap; | |
593 | uint type; | |
594 | lid_t lid; | |
595 | struct tlock *ditlck, *tlck; | |
596 | struct linelock *dilinelock, *ilinelock; | |
597 | struct lv *lv; | |
598 | int n; | |
599 | ||
600 | ipimap = jfs_ip->ipimap; | |
601 | ||
602 | ino = ip->i_ino & (INOSPERIAG - 1); | |
603 | ||
604 | if (!addressPXD(&(jfs_ip->ixpxd)) || | |
605 | (lengthPXD(&(jfs_ip->ixpxd)) != | |
606 | JFS_IP(ipimap)->i_imap->im_nbperiext)) { | |
eb8630d7 | 607 | jfs_error(ip->i_sb, "ixpxd invalid\n"); |
1da177e4 LT |
608 | return -EIO; |
609 | } | |
610 | ||
611 | /* | |
612 | * read the page of disk inode containing the specified inode: | |
613 | */ | |
614 | /* compute the block address of the page */ | |
615 | blkno = INOPBLK(&(jfs_ip->ixpxd), ino, sbi->l2nbperpage); | |
616 | ||
617 | rel_inode = (ino & (INOSPERPAGE - 1)); | |
618 | pageno = blkno >> sbi->l2nbperpage; | |
619 | ||
620 | if ((block_offset = ((u32) blkno & (sbi->nbperpage - 1)))) { | |
621 | /* | |
622 | * OS/2 didn't always align inode extents on page boundaries | |
623 | */ | |
624 | inodes_left = | |
625 | (sbi->nbperpage - block_offset) << sbi->l2niperblk; | |
626 | ||
627 | if (rel_inode < inodes_left) | |
628 | rel_inode += block_offset << sbi->l2niperblk; | |
629 | else { | |
630 | pageno += 1; | |
631 | rel_inode -= inodes_left; | |
632 | } | |
633 | } | |
634 | /* read the page of disk inode */ | |
635 | retry: | |
636 | mp = read_metapage(ipimap, pageno << sbi->l2nbperpage, PSIZE, 1); | |
09aaa749 | 637 | if (!mp) |
1da177e4 LT |
638 | return -EIO; |
639 | ||
640 | /* get the pointer to the disk inode */ | |
641 | dp = (struct dinode *) mp->data; | |
642 | dp += rel_inode; | |
643 | ||
644 | dioffset = (ino & (INOSPERPAGE - 1)) << L2DISIZE; | |
645 | ||
646 | /* | |
647 | * acquire transaction lock on the on-disk inode; | |
648 | * N.B. tlock is acquired on ipimap not ip; | |
649 | */ | |
650 | if ((ditlck = | |
651 | txLock(tid, ipimap, mp, tlckINODE | tlckENTRY)) == NULL) | |
652 | goto retry; | |
653 | dilinelock = (struct linelock *) & ditlck->lock; | |
654 | ||
655 | /* | |
656 | * copy btree root from in-memory inode to on-disk inode | |
657 | * | |
658 | * (tlock is taken from inline B+-tree root in in-memory | |
63f83c9f | 659 | * inode when the B+-tree root is updated, which is pointed |
1da177e4 LT |
660 | * by jfs_ip->blid as well as being on tx tlock list) |
661 | * | |
63f83c9f DK |
662 | * further processing of btree root is based on the copy |
663 | * in in-memory inode, where txLog() will log from, and, | |
1da177e4 LT |
664 | * for xtree root, txUpdateMap() will update map and reset |
665 | * XAD_NEW bit; | |
666 | */ | |
667 | ||
668 | if (S_ISDIR(ip->i_mode) && (lid = jfs_ip->xtlid)) { | |
669 | /* | |
670 | * This is the special xtree inside the directory for storing | |
671 | * the directory table | |
672 | */ | |
a779ed75 | 673 | xtroot_t *p, *xp; |
1da177e4 LT |
674 | xad_t *xad; |
675 | ||
676 | jfs_ip->xtlid = 0; | |
677 | tlck = lid_to_tlock(lid); | |
678 | assert(tlck->type & tlckXTREE); | |
679 | tlck->type |= tlckBTROOT; | |
680 | tlck->mp = mp; | |
681 | ilinelock = (struct linelock *) & tlck->lock; | |
682 | ||
683 | /* | |
684 | * copy xtree root from inode to dinode: | |
685 | */ | |
686 | p = &jfs_ip->i_xtroot; | |
a779ed75 | 687 | xp = (xtroot_t *) &dp->di_dirtable; |
1da177e4 LT |
688 | lv = ilinelock->lv; |
689 | for (n = 0; n < ilinelock->index; n++, lv++) { | |
690 | memcpy(&xp->xad[lv->offset], &p->xad[lv->offset], | |
691 | lv->length << L2XTSLOTSIZE); | |
692 | } | |
693 | ||
694 | /* reset on-disk (metadata page) xtree XAD_NEW bit */ | |
695 | xad = &xp->xad[XTENTRYSTART]; | |
696 | for (n = XTENTRYSTART; | |
697 | n < le16_to_cpu(xp->header.nextindex); n++, xad++) | |
698 | if (xad->flag & (XAD_NEW | XAD_EXTENDED)) | |
699 | xad->flag &= ~(XAD_NEW | XAD_EXTENDED); | |
700 | } | |
701 | ||
702 | if ((lid = jfs_ip->blid) == 0) | |
703 | goto inlineData; | |
704 | jfs_ip->blid = 0; | |
705 | ||
706 | tlck = lid_to_tlock(lid); | |
707 | type = tlck->type; | |
708 | tlck->type |= tlckBTROOT; | |
709 | tlck->mp = mp; | |
710 | ilinelock = (struct linelock *) & tlck->lock; | |
711 | ||
712 | /* | |
f720e3ba | 713 | * regular file: 16 byte (XAD slot) granularity |
1da177e4 LT |
714 | */ |
715 | if (type & tlckXTREE) { | |
a779ed75 | 716 | xtroot_t *p, *xp; |
1da177e4 LT |
717 | xad_t *xad; |
718 | ||
719 | /* | |
720 | * copy xtree root from inode to dinode: | |
721 | */ | |
722 | p = &jfs_ip->i_xtroot; | |
723 | xp = &dp->di_xtroot; | |
724 | lv = ilinelock->lv; | |
725 | for (n = 0; n < ilinelock->index; n++, lv++) { | |
726 | memcpy(&xp->xad[lv->offset], &p->xad[lv->offset], | |
727 | lv->length << L2XTSLOTSIZE); | |
728 | } | |
729 | ||
730 | /* reset on-disk (metadata page) xtree XAD_NEW bit */ | |
731 | xad = &xp->xad[XTENTRYSTART]; | |
732 | for (n = XTENTRYSTART; | |
733 | n < le16_to_cpu(xp->header.nextindex); n++, xad++) | |
734 | if (xad->flag & (XAD_NEW | XAD_EXTENDED)) | |
735 | xad->flag &= ~(XAD_NEW | XAD_EXTENDED); | |
736 | } | |
737 | /* | |
f720e3ba | 738 | * directory: 32 byte (directory entry slot) granularity |
1da177e4 LT |
739 | */ |
740 | else if (type & tlckDTREE) { | |
741 | dtpage_t *p, *xp; | |
742 | ||
743 | /* | |
744 | * copy dtree root from inode to dinode: | |
745 | */ | |
746 | p = (dtpage_t *) &jfs_ip->i_dtroot; | |
747 | xp = (dtpage_t *) & dp->di_dtroot; | |
748 | lv = ilinelock->lv; | |
749 | for (n = 0; n < ilinelock->index; n++, lv++) { | |
750 | memcpy(&xp->slot[lv->offset], &p->slot[lv->offset], | |
751 | lv->length << L2DTSLOTSIZE); | |
752 | } | |
753 | } else { | |
754 | jfs_err("diWrite: UFO tlock"); | |
755 | } | |
756 | ||
757 | inlineData: | |
758 | /* | |
759 | * copy inline symlink from in-memory inode to on-disk inode | |
760 | */ | |
761 | if (S_ISLNK(ip->i_mode) && ip->i_size < IDATASIZE) { | |
762 | lv = & dilinelock->lv[dilinelock->index]; | |
763 | lv->offset = (dioffset + 2 * 128) >> L2INODESLOTSIZE; | |
764 | lv->length = 2; | |
5d299f44 | 765 | memcpy(&dp->di_inline_all, jfs_ip->i_inline_all, IDATASIZE); |
1da177e4 LT |
766 | dilinelock->index++; |
767 | } | |
768 | /* | |
769 | * copy inline data from in-memory inode to on-disk inode: | |
770 | * 128 byte slot granularity | |
771 | */ | |
772 | if (test_cflag(COMMIT_Inlineea, ip)) { | |
773 | lv = & dilinelock->lv[dilinelock->index]; | |
774 | lv->offset = (dioffset + 3 * 128) >> L2INODESLOTSIZE; | |
775 | lv->length = 1; | |
776 | memcpy(&dp->di_inlineea, jfs_ip->i_inline_ea, INODESLOTSIZE); | |
777 | dilinelock->index++; | |
778 | ||
779 | clear_cflag(COMMIT_Inlineea, ip); | |
780 | } | |
781 | ||
782 | /* | |
f720e3ba | 783 | * lock/copy inode base: 128 byte slot granularity |
1da177e4 | 784 | */ |
1da177e4 LT |
785 | lv = & dilinelock->lv[dilinelock->index]; |
786 | lv->offset = dioffset >> L2INODESLOTSIZE; | |
787 | copy_to_dinode(dp, ip); | |
788 | if (test_and_clear_cflag(COMMIT_Dirtable, ip)) { | |
789 | lv->length = 2; | |
790 | memcpy(&dp->di_dirtable, &jfs_ip->i_dirtable, 96); | |
791 | } else | |
792 | lv->length = 1; | |
793 | dilinelock->index++; | |
794 | ||
63f83c9f | 795 | /* release the buffer holding the updated on-disk inode. |
1da177e4 LT |
796 | * the buffer will be later written by commit processing. |
797 | */ | |
798 | write_metapage(mp); | |
799 | ||
800 | return (rc); | |
801 | } | |
802 | ||
803 | ||
804 | /* | |
f720e3ba | 805 | * NAME: diFree(ip) |
1da177e4 | 806 | * |
f720e3ba | 807 | * FUNCTION: free a specified inode from the inode working map |
1da177e4 LT |
808 | * for a fileset or aggregate. |
809 | * | |
810 | * if the inode to be freed represents the first (only) | |
811 | * free inode within the iag, the iag will be placed on | |
812 | * the ag free inode list. | |
63f83c9f | 813 | * |
1da177e4 LT |
814 | * freeing the inode will cause the inode extent to be |
815 | * freed if the inode is the only allocated inode within | |
816 | * the extent. in this case all the disk resource backing | |
817 | * up the inode extent will be freed. in addition, the iag | |
818 | * will be placed on the ag extent free list if the extent | |
819 | * is the first free extent in the iag. if freeing the | |
820 | * extent also means that no free inodes will exist for | |
821 | * the iag, the iag will also be removed from the ag free | |
822 | * inode list. | |
823 | * | |
824 | * the iag describing the inode will be freed if the extent | |
825 | * is to be freed and it is the only backed extent within | |
826 | * the iag. in this case, the iag will be removed from the | |
827 | * ag free extent list and ag free inode list and placed on | |
828 | * the inode map's free iag list. | |
829 | * | |
830 | * a careful update approach is used to provide consistency | |
831 | * in the face of updates to multiple buffers. under this | |
832 | * approach, all required buffers are obtained before making | |
833 | * any updates and are held until all updates are complete. | |
834 | * | |
835 | * PARAMETERS: | |
f720e3ba | 836 | * ip - inode to be freed. |
1da177e4 LT |
837 | * |
838 | * RETURN VALUES: | |
f720e3ba DK |
839 | * 0 - success |
840 | * -EIO - i/o error. | |
1da177e4 LT |
841 | */ |
842 | int diFree(struct inode *ip) | |
843 | { | |
844 | int rc; | |
845 | ino_t inum = ip->i_ino; | |
846 | struct iag *iagp, *aiagp, *biagp, *ciagp, *diagp; | |
847 | struct metapage *mp, *amp, *bmp, *cmp, *dmp; | |
848 | int iagno, ino, extno, bitno, sword, agno; | |
849 | int back, fwd; | |
850 | u32 bitmap, mask; | |
851 | struct inode *ipimap = JFS_SBI(ip->i_sb)->ipimap; | |
852 | struct inomap *imap = JFS_IP(ipimap)->i_imap; | |
853 | pxd_t freepxd; | |
854 | tid_t tid; | |
855 | struct inode *iplist[3]; | |
856 | struct tlock *tlck; | |
857 | struct pxd_lock *pxdlock; | |
858 | ||
859 | /* | |
860 | * This is just to suppress compiler warnings. The same logic that | |
861 | * references these variables is used to initialize them. | |
862 | */ | |
863 | aiagp = biagp = ciagp = diagp = NULL; | |
864 | ||
865 | /* get the iag number containing the inode. | |
866 | */ | |
867 | iagno = INOTOIAG(inum); | |
868 | ||
63f83c9f | 869 | /* make sure that the iag is contained within |
1da177e4 LT |
870 | * the map. |
871 | */ | |
872 | if (iagno >= imap->im_nextiag) { | |
288e4d83 DK |
873 | print_hex_dump(KERN_ERR, "imap: ", DUMP_PREFIX_ADDRESS, 16, 4, |
874 | imap, 32, 0); | |
eb8630d7 | 875 | jfs_error(ip->i_sb, "inum = %d, iagno = %d, nextiag = %d\n", |
1da177e4 LT |
876 | (uint) inum, iagno, imap->im_nextiag); |
877 | return -EIO; | |
878 | } | |
879 | ||
880 | /* get the allocation group for this ino. | |
881 | */ | |
d31b53e3 | 882 | agno = BLKTOAG(JFS_IP(ip)->agstart, JFS_SBI(ip->i_sb)); |
1da177e4 LT |
883 | |
884 | /* Lock the AG specific inode map information | |
885 | */ | |
886 | AG_LOCK(imap, agno); | |
887 | ||
888 | /* Obtain read lock in imap inode. Don't release it until we have | |
889 | * read all of the IAG's that we are going to. | |
890 | */ | |
82d5b9a7 | 891 | IREAD_LOCK(ipimap, RDWRLOCK_IMAP); |
1da177e4 LT |
892 | |
893 | /* read the iag. | |
894 | */ | |
895 | if ((rc = diIAGRead(imap, iagno, &mp))) { | |
896 | IREAD_UNLOCK(ipimap); | |
897 | AG_UNLOCK(imap, agno); | |
898 | return (rc); | |
899 | } | |
900 | iagp = (struct iag *) mp->data; | |
901 | ||
902 | /* get the inode number and extent number of the inode within | |
903 | * the iag and the inode number within the extent. | |
904 | */ | |
905 | ino = inum & (INOSPERIAG - 1); | |
906 | extno = ino >> L2INOSPEREXT; | |
907 | bitno = ino & (INOSPEREXT - 1); | |
908 | mask = HIGHORDER >> bitno; | |
909 | ||
910 | if (!(le32_to_cpu(iagp->wmap[extno]) & mask)) { | |
eb8630d7 | 911 | jfs_error(ip->i_sb, "wmap shows inode already free\n"); |
1da177e4 LT |
912 | } |
913 | ||
914 | if (!addressPXD(&iagp->inoext[extno])) { | |
915 | release_metapage(mp); | |
916 | IREAD_UNLOCK(ipimap); | |
917 | AG_UNLOCK(imap, agno); | |
eb8630d7 | 918 | jfs_error(ip->i_sb, "invalid inoext\n"); |
1da177e4 LT |
919 | return -EIO; |
920 | } | |
921 | ||
922 | /* compute the bitmap for the extent reflecting the freed inode. | |
923 | */ | |
924 | bitmap = le32_to_cpu(iagp->wmap[extno]) & ~mask; | |
925 | ||
926 | if (imap->im_agctl[agno].numfree > imap->im_agctl[agno].numinos) { | |
927 | release_metapage(mp); | |
928 | IREAD_UNLOCK(ipimap); | |
929 | AG_UNLOCK(imap, agno); | |
eb8630d7 | 930 | jfs_error(ip->i_sb, "numfree > numinos\n"); |
1da177e4 LT |
931 | return -EIO; |
932 | } | |
933 | /* | |
f720e3ba DK |
934 | * inode extent still has some inodes or below low water mark: |
935 | * keep the inode extent; | |
1da177e4 LT |
936 | */ |
937 | if (bitmap || | |
938 | imap->im_agctl[agno].numfree < 96 || | |
939 | (imap->im_agctl[agno].numfree < 288 && | |
940 | (((imap->im_agctl[agno].numfree * 100) / | |
941 | imap->im_agctl[agno].numinos) <= 25))) { | |
942 | /* if the iag currently has no free inodes (i.e., | |
943 | * the inode being freed is the first free inode of iag), | |
944 | * insert the iag at head of the inode free list for the ag. | |
945 | */ | |
946 | if (iagp->nfreeinos == 0) { | |
947 | /* check if there are any iags on the ag inode | |
948 | * free list. if so, read the first one so that | |
949 | * we can link the current iag onto the list at | |
950 | * the head. | |
951 | */ | |
952 | if ((fwd = imap->im_agctl[agno].inofree) >= 0) { | |
953 | /* read the iag that currently is the head | |
954 | * of the list. | |
955 | */ | |
956 | if ((rc = diIAGRead(imap, fwd, &))) { | |
957 | IREAD_UNLOCK(ipimap); | |
958 | AG_UNLOCK(imap, agno); | |
959 | release_metapage(mp); | |
960 | return (rc); | |
961 | } | |
962 | aiagp = (struct iag *) amp->data; | |
963 | ||
964 | /* make current head point back to the iag. | |
965 | */ | |
966 | aiagp->inofreeback = cpu_to_le32(iagno); | |
967 | ||
968 | write_metapage(amp); | |
969 | } | |
970 | ||
971 | /* iag points forward to current head and iag | |
972 | * becomes the new head of the list. | |
973 | */ | |
974 | iagp->inofreefwd = | |
975 | cpu_to_le32(imap->im_agctl[agno].inofree); | |
976 | iagp->inofreeback = cpu_to_le32(-1); | |
977 | imap->im_agctl[agno].inofree = iagno; | |
978 | } | |
979 | IREAD_UNLOCK(ipimap); | |
980 | ||
981 | /* update the free inode summary map for the extent if | |
982 | * freeing the inode means the extent will now have free | |
63f83c9f | 983 | * inodes (i.e., the inode being freed is the first free |
1da177e4 LT |
984 | * inode of extent), |
985 | */ | |
986 | if (iagp->wmap[extno] == cpu_to_le32(ONES)) { | |
987 | sword = extno >> L2EXTSPERSUM; | |
988 | bitno = extno & (EXTSPERSUM - 1); | |
989 | iagp->inosmap[sword] &= | |
990 | cpu_to_le32(~(HIGHORDER >> bitno)); | |
991 | } | |
992 | ||
993 | /* update the bitmap. | |
994 | */ | |
995 | iagp->wmap[extno] = cpu_to_le32(bitmap); | |
1da177e4 LT |
996 | |
997 | /* update the free inode counts at the iag, ag and | |
998 | * map level. | |
999 | */ | |
89145622 | 1000 | le32_add_cpu(&iagp->nfreeinos, 1); |
1da177e4 LT |
1001 | imap->im_agctl[agno].numfree += 1; |
1002 | atomic_inc(&imap->im_numfree); | |
1003 | ||
1004 | /* release the AG inode map lock | |
1005 | */ | |
1006 | AG_UNLOCK(imap, agno); | |
1007 | ||
1008 | /* write the iag */ | |
1009 | write_metapage(mp); | |
1010 | ||
1011 | return (0); | |
1012 | } | |
1013 | ||
1014 | ||
1015 | /* | |
f720e3ba DK |
1016 | * inode extent has become free and above low water mark: |
1017 | * free the inode extent; | |
1da177e4 LT |
1018 | */ |
1019 | ||
1020 | /* | |
f720e3ba | 1021 | * prepare to update iag list(s) (careful update step 1) |
1da177e4 LT |
1022 | */ |
1023 | amp = bmp = cmp = dmp = NULL; | |
1024 | fwd = back = -1; | |
1025 | ||
1026 | /* check if the iag currently has no free extents. if so, | |
1027 | * it will be placed on the head of the ag extent free list. | |
1028 | */ | |
1029 | if (iagp->nfreeexts == 0) { | |
1030 | /* check if the ag extent free list has any iags. | |
1031 | * if so, read the iag at the head of the list now. | |
1032 | * this (head) iag will be updated later to reflect | |
1033 | * the addition of the current iag at the head of | |
1034 | * the list. | |
1035 | */ | |
1036 | if ((fwd = imap->im_agctl[agno].extfree) >= 0) { | |
1037 | if ((rc = diIAGRead(imap, fwd, &))) | |
1038 | goto error_out; | |
1039 | aiagp = (struct iag *) amp->data; | |
1040 | } | |
1041 | } else { | |
1042 | /* iag has free extents. check if the addition of a free | |
1043 | * extent will cause all extents to be free within this | |
1044 | * iag. if so, the iag will be removed from the ag extent | |
1045 | * free list and placed on the inode map's free iag list. | |
1046 | */ | |
1047 | if (iagp->nfreeexts == cpu_to_le32(EXTSPERIAG - 1)) { | |
1048 | /* in preparation for removing the iag from the | |
25985edc | 1049 | * ag extent free list, read the iags preceding |
1da177e4 LT |
1050 | * and following the iag on the ag extent free |
1051 | * list. | |
1052 | */ | |
1053 | if ((fwd = le32_to_cpu(iagp->extfreefwd)) >= 0) { | |
1054 | if ((rc = diIAGRead(imap, fwd, &))) | |
1055 | goto error_out; | |
1056 | aiagp = (struct iag *) amp->data; | |
1057 | } | |
1058 | ||
1059 | if ((back = le32_to_cpu(iagp->extfreeback)) >= 0) { | |
1060 | if ((rc = diIAGRead(imap, back, &bmp))) | |
1061 | goto error_out; | |
1062 | biagp = (struct iag *) bmp->data; | |
1063 | } | |
1064 | } | |
1065 | } | |
1066 | ||
1067 | /* remove the iag from the ag inode free list if freeing | |
1068 | * this extent cause the iag to have no free inodes. | |
1069 | */ | |
1070 | if (iagp->nfreeinos == cpu_to_le32(INOSPEREXT - 1)) { | |
1071 | int inofreeback = le32_to_cpu(iagp->inofreeback); | |
1072 | int inofreefwd = le32_to_cpu(iagp->inofreefwd); | |
1073 | ||
1074 | /* in preparation for removing the iag from the | |
25985edc | 1075 | * ag inode free list, read the iags preceding |
1da177e4 LT |
1076 | * and following the iag on the ag inode free |
1077 | * list. before reading these iags, we must make | |
1078 | * sure that we already don't have them in hand | |
1079 | * from up above, since re-reading an iag (buffer) | |
1080 | * we are currently holding would cause a deadlock. | |
1081 | */ | |
1082 | if (inofreefwd >= 0) { | |
1083 | ||
1084 | if (inofreefwd == fwd) | |
1085 | ciagp = (struct iag *) amp->data; | |
1086 | else if (inofreefwd == back) | |
1087 | ciagp = (struct iag *) bmp->data; | |
1088 | else { | |
1089 | if ((rc = | |
1090 | diIAGRead(imap, inofreefwd, &cmp))) | |
1091 | goto error_out; | |
1092 | ciagp = (struct iag *) cmp->data; | |
1093 | } | |
1094 | assert(ciagp != NULL); | |
1095 | } | |
1096 | ||
1097 | if (inofreeback >= 0) { | |
1098 | if (inofreeback == fwd) | |
1099 | diagp = (struct iag *) amp->data; | |
1100 | else if (inofreeback == back) | |
1101 | diagp = (struct iag *) bmp->data; | |
1102 | else { | |
1103 | if ((rc = | |
1104 | diIAGRead(imap, inofreeback, &dmp))) | |
1105 | goto error_out; | |
1106 | diagp = (struct iag *) dmp->data; | |
1107 | } | |
1108 | assert(diagp != NULL); | |
1109 | } | |
1110 | } | |
1111 | ||
1112 | IREAD_UNLOCK(ipimap); | |
1113 | ||
1114 | /* | |
1115 | * invalidate any page of the inode extent freed from buffer cache; | |
1116 | */ | |
1117 | freepxd = iagp->inoext[extno]; | |
1118 | invalidate_pxd_metapages(ip, freepxd); | |
1119 | ||
1120 | /* | |
f720e3ba | 1121 | * update iag list(s) (careful update step 2) |
1da177e4 LT |
1122 | */ |
1123 | /* add the iag to the ag extent free list if this is the | |
1124 | * first free extent for the iag. | |
1125 | */ | |
1126 | if (iagp->nfreeexts == 0) { | |
1127 | if (fwd >= 0) | |
1128 | aiagp->extfreeback = cpu_to_le32(iagno); | |
1129 | ||
1130 | iagp->extfreefwd = | |
1131 | cpu_to_le32(imap->im_agctl[agno].extfree); | |
1132 | iagp->extfreeback = cpu_to_le32(-1); | |
1133 | imap->im_agctl[agno].extfree = iagno; | |
1134 | } else { | |
1135 | /* remove the iag from the ag extent list if all extents | |
1136 | * are now free and place it on the inode map iag free list. | |
1137 | */ | |
1138 | if (iagp->nfreeexts == cpu_to_le32(EXTSPERIAG - 1)) { | |
1139 | if (fwd >= 0) | |
1140 | aiagp->extfreeback = iagp->extfreeback; | |
1141 | ||
1142 | if (back >= 0) | |
1143 | biagp->extfreefwd = iagp->extfreefwd; | |
1144 | else | |
1145 | imap->im_agctl[agno].extfree = | |
1146 | le32_to_cpu(iagp->extfreefwd); | |
1147 | ||
1148 | iagp->extfreefwd = iagp->extfreeback = cpu_to_le32(-1); | |
1149 | ||
1150 | IAGFREE_LOCK(imap); | |
1151 | iagp->iagfree = cpu_to_le32(imap->im_freeiag); | |
1152 | imap->im_freeiag = iagno; | |
1153 | IAGFREE_UNLOCK(imap); | |
1154 | } | |
1155 | } | |
1156 | ||
1157 | /* remove the iag from the ag inode free list if freeing | |
1158 | * this extent causes the iag to have no free inodes. | |
1159 | */ | |
1160 | if (iagp->nfreeinos == cpu_to_le32(INOSPEREXT - 1)) { | |
1161 | if ((int) le32_to_cpu(iagp->inofreefwd) >= 0) | |
1162 | ciagp->inofreeback = iagp->inofreeback; | |
1163 | ||
1164 | if ((int) le32_to_cpu(iagp->inofreeback) >= 0) | |
1165 | diagp->inofreefwd = iagp->inofreefwd; | |
1166 | else | |
1167 | imap->im_agctl[agno].inofree = | |
1168 | le32_to_cpu(iagp->inofreefwd); | |
1169 | ||
1170 | iagp->inofreefwd = iagp->inofreeback = cpu_to_le32(-1); | |
1171 | } | |
1172 | ||
63f83c9f | 1173 | /* update the inode extent address and working map |
1da177e4 | 1174 | * to reflect the free extent. |
63f83c9f | 1175 | * the permanent map should have been updated already |
1da177e4 LT |
1176 | * for the inode being freed. |
1177 | */ | |
1178 | if (iagp->pmap[extno] != 0) { | |
eb8630d7 | 1179 | jfs_error(ip->i_sb, "the pmap does not show inode free\n"); |
1da177e4 LT |
1180 | } |
1181 | iagp->wmap[extno] = 0; | |
1da177e4 LT |
1182 | PXDlength(&iagp->inoext[extno], 0); |
1183 | PXDaddress(&iagp->inoext[extno], 0); | |
1184 | ||
1185 | /* update the free extent and free inode summary maps | |
1186 | * to reflect the freed extent. | |
63f83c9f | 1187 | * the inode summary map is marked to indicate no inodes |
1da177e4 LT |
1188 | * available for the freed extent. |
1189 | */ | |
1190 | sword = extno >> L2EXTSPERSUM; | |
1191 | bitno = extno & (EXTSPERSUM - 1); | |
1192 | mask = HIGHORDER >> bitno; | |
1193 | iagp->inosmap[sword] |= cpu_to_le32(mask); | |
1194 | iagp->extsmap[sword] &= cpu_to_le32(~mask); | |
1195 | ||
1196 | /* update the number of free inodes and number of free extents | |
1197 | * for the iag. | |
1198 | */ | |
89145622 MS |
1199 | le32_add_cpu(&iagp->nfreeinos, -(INOSPEREXT - 1)); |
1200 | le32_add_cpu(&iagp->nfreeexts, 1); | |
1da177e4 LT |
1201 | |
1202 | /* update the number of free inodes and backed inodes | |
1203 | * at the ag and inode map level. | |
1204 | */ | |
1205 | imap->im_agctl[agno].numfree -= (INOSPEREXT - 1); | |
1206 | imap->im_agctl[agno].numinos -= INOSPEREXT; | |
1207 | atomic_sub(INOSPEREXT - 1, &imap->im_numfree); | |
1208 | atomic_sub(INOSPEREXT, &imap->im_numinos); | |
1209 | ||
1210 | if (amp) | |
1211 | write_metapage(amp); | |
1212 | if (bmp) | |
1213 | write_metapage(bmp); | |
1214 | if (cmp) | |
1215 | write_metapage(cmp); | |
1216 | if (dmp) | |
1217 | write_metapage(dmp); | |
1218 | ||
1219 | /* | |
1220 | * start transaction to update block allocation map | |
1221 | * for the inode extent freed; | |
1222 | * | |
63f83c9f | 1223 | * N.B. AG_LOCK is released and iag will be released below, and |
1da177e4 | 1224 | * other thread may allocate inode from/reusing the ixad freed |
63f83c9f DK |
1225 | * BUT with new/different backing inode extent from the extent |
1226 | * to be freed by the transaction; | |
1da177e4 LT |
1227 | */ |
1228 | tid = txBegin(ipimap->i_sb, COMMIT_FORCE); | |
1de87444 | 1229 | mutex_lock(&JFS_IP(ipimap)->commit_mutex); |
1da177e4 | 1230 | |
63f83c9f | 1231 | /* acquire tlock of the iag page of the freed ixad |
1da177e4 | 1232 | * to force the page NOHOMEOK (even though no data is |
63f83c9f | 1233 | * logged from the iag page) until NOREDOPAGE|FREEXTENT log |
1da177e4 LT |
1234 | * for the free of the extent is committed; |
1235 | * write FREEXTENT|NOREDOPAGE log record | |
1236 | * N.B. linelock is overlaid as freed extent descriptor; | |
1237 | */ | |
1238 | tlck = txLock(tid, ipimap, mp, tlckINODE | tlckFREE); | |
1239 | pxdlock = (struct pxd_lock *) & tlck->lock; | |
1240 | pxdlock->flag = mlckFREEPXD; | |
1241 | pxdlock->pxd = freepxd; | |
1242 | pxdlock->index = 1; | |
1243 | ||
1244 | write_metapage(mp); | |
1245 | ||
1246 | iplist[0] = ipimap; | |
1247 | ||
1248 | /* | |
1249 | * logredo needs the IAG number and IAG extent index in order | |
1250 | * to ensure that the IMap is consistent. The least disruptive | |
1251 | * way to pass these values through to the transaction manager | |
63f83c9f DK |
1252 | * is in the iplist array. |
1253 | * | |
1da177e4 LT |
1254 | * It's not pretty, but it works. |
1255 | */ | |
1256 | iplist[1] = (struct inode *) (size_t)iagno; | |
1257 | iplist[2] = (struct inode *) (size_t)extno; | |
1258 | ||
1259 | rc = txCommit(tid, 1, &iplist[0], COMMIT_FORCE); | |
1260 | ||
1261 | txEnd(tid); | |
1de87444 | 1262 | mutex_unlock(&JFS_IP(ipimap)->commit_mutex); |
1da177e4 LT |
1263 | |
1264 | /* unlock the AG inode map information */ | |
1265 | AG_UNLOCK(imap, agno); | |
1266 | ||
1267 | return (0); | |
1268 | ||
1269 | error_out: | |
1270 | IREAD_UNLOCK(ipimap); | |
1271 | ||
1272 | if (amp) | |
1273 | release_metapage(amp); | |
1274 | if (bmp) | |
1275 | release_metapage(bmp); | |
1276 | if (cmp) | |
1277 | release_metapage(cmp); | |
1278 | if (dmp) | |
1279 | release_metapage(dmp); | |
1280 | ||
1281 | AG_UNLOCK(imap, agno); | |
1282 | ||
1283 | release_metapage(mp); | |
1284 | ||
1285 | return (rc); | |
1286 | } | |
1287 | ||
1288 | /* | |
1289 | * There are several places in the diAlloc* routines where we initialize | |
1290 | * the inode. | |
1291 | */ | |
1292 | static inline void | |
1293 | diInitInode(struct inode *ip, int iagno, int ino, int extno, struct iag * iagp) | |
1294 | { | |
1da177e4 LT |
1295 | struct jfs_inode_info *jfs_ip = JFS_IP(ip); |
1296 | ||
1297 | ip->i_ino = (iagno << L2INOSPERIAG) + ino; | |
1da177e4 | 1298 | jfs_ip->ixpxd = iagp->inoext[extno]; |
d31b53e3 | 1299 | jfs_ip->agstart = le64_to_cpu(iagp->agstart); |
1da177e4 LT |
1300 | jfs_ip->active_ag = -1; |
1301 | } | |
1302 | ||
1303 | ||
1304 | /* | |
f720e3ba | 1305 | * NAME: diAlloc(pip,dir,ip) |
1da177e4 | 1306 | * |
f720e3ba | 1307 | * FUNCTION: allocate a disk inode from the inode working map |
1da177e4 LT |
1308 | * for a fileset or aggregate. |
1309 | * | |
1310 | * PARAMETERS: | |
f720e3ba DK |
1311 | * pip - pointer to incore inode for the parent inode. |
1312 | * dir - 'true' if the new disk inode is for a directory. | |
1313 | * ip - pointer to a new inode | |
1da177e4 LT |
1314 | * |
1315 | * RETURN VALUES: | |
f720e3ba DK |
1316 | * 0 - success. |
1317 | * -ENOSPC - insufficient disk resources. | |
1318 | * -EIO - i/o error. | |
1da177e4 | 1319 | */ |
4d81715f | 1320 | int diAlloc(struct inode *pip, bool dir, struct inode *ip) |
1da177e4 LT |
1321 | { |
1322 | int rc, ino, iagno, addext, extno, bitno, sword; | |
05d9ea1c | 1323 | int nwords, rem, i, agno, dn_numag; |
1da177e4 LT |
1324 | u32 mask, inosmap, extsmap; |
1325 | struct inode *ipimap; | |
1326 | struct metapage *mp; | |
1327 | ino_t inum; | |
1328 | struct iag *iagp; | |
1329 | struct inomap *imap; | |
1330 | ||
1331 | /* get the pointers to the inode map inode and the | |
1332 | * corresponding imap control structure. | |
1333 | */ | |
1334 | ipimap = JFS_SBI(pip->i_sb)->ipimap; | |
1335 | imap = JFS_IP(ipimap)->i_imap; | |
1336 | JFS_IP(ip)->ipimap = ipimap; | |
1337 | JFS_IP(ip)->fileset = FILESYSTEM_I; | |
1338 | ||
63f83c9f | 1339 | /* for a directory, the allocation policy is to start |
1da177e4 LT |
1340 | * at the ag level using the preferred ag. |
1341 | */ | |
4d81715f | 1342 | if (dir) { |
1da177e4 LT |
1343 | agno = dbNextAG(JFS_SBI(pip->i_sb)->ipbmap); |
1344 | AG_LOCK(imap, agno); | |
1345 | goto tryag; | |
1346 | } | |
1347 | ||
1348 | /* for files, the policy starts off by trying to allocate from | |
1349 | * the same iag containing the parent disk inode: | |
1350 | * try to allocate the new disk inode close to the parent disk | |
1351 | * inode, using parent disk inode number + 1 as the allocation | |
1352 | * hint. (we use a left-to-right policy to attempt to avoid | |
1353 | * moving backward on the disk.) compute the hint within the | |
1354 | * file system and the iag. | |
1355 | */ | |
1356 | ||
1357 | /* get the ag number of this iag */ | |
d31b53e3 | 1358 | agno = BLKTOAG(JFS_IP(pip)->agstart, JFS_SBI(pip->i_sb)); |
05d9ea1c MG |
1359 | dn_numag = JFS_SBI(pip->i_sb)->bmap->db_numag; |
1360 | if (agno < 0 || agno > dn_numag) | |
1361 | return -EIO; | |
1da177e4 LT |
1362 | |
1363 | if (atomic_read(&JFS_SBI(pip->i_sb)->bmap->db_active[agno])) { | |
1364 | /* | |
1365 | * There is an open file actively growing. We want to | |
1366 | * allocate new inodes from a different ag to avoid | |
1367 | * fragmentation problems. | |
1368 | */ | |
1369 | agno = dbNextAG(JFS_SBI(pip->i_sb)->ipbmap); | |
1370 | AG_LOCK(imap, agno); | |
1371 | goto tryag; | |
1372 | } | |
1373 | ||
1374 | inum = pip->i_ino + 1; | |
1375 | ino = inum & (INOSPERIAG - 1); | |
1376 | ||
59c51591 | 1377 | /* back off the hint if it is outside of the iag */ |
1da177e4 LT |
1378 | if (ino == 0) |
1379 | inum = pip->i_ino; | |
1380 | ||
1381 | /* lock the AG inode map information */ | |
1382 | AG_LOCK(imap, agno); | |
1383 | ||
1384 | /* Get read lock on imap inode */ | |
82d5b9a7 | 1385 | IREAD_LOCK(ipimap, RDWRLOCK_IMAP); |
1da177e4 LT |
1386 | |
1387 | /* get the iag number and read the iag */ | |
1388 | iagno = INOTOIAG(inum); | |
1389 | if ((rc = diIAGRead(imap, iagno, &mp))) { | |
1390 | IREAD_UNLOCK(ipimap); | |
1391 | AG_UNLOCK(imap, agno); | |
1392 | return (rc); | |
1393 | } | |
1394 | iagp = (struct iag *) mp->data; | |
1395 | ||
1396 | /* determine if new inode extent is allowed to be added to the iag. | |
1397 | * new inode extent can be added to the iag if the ag | |
1398 | * has less than 32 free disk inodes and the iag has free extents. | |
1399 | */ | |
1400 | addext = (imap->im_agctl[agno].numfree < 32 && iagp->nfreeexts); | |
1401 | ||
1402 | /* | |
f720e3ba | 1403 | * try to allocate from the IAG |
1da177e4 | 1404 | */ |
63f83c9f | 1405 | /* check if the inode may be allocated from the iag |
1da177e4 LT |
1406 | * (i.e. the inode has free inodes or new extent can be added). |
1407 | */ | |
1408 | if (iagp->nfreeinos || addext) { | |
1409 | /* determine the extent number of the hint. | |
1410 | */ | |
1411 | extno = ino >> L2INOSPEREXT; | |
1412 | ||
1413 | /* check if the extent containing the hint has backed | |
1414 | * inodes. if so, try to allocate within this extent. | |
1415 | */ | |
1416 | if (addressPXD(&iagp->inoext[extno])) { | |
1417 | bitno = ino & (INOSPEREXT - 1); | |
1418 | if ((bitno = | |
1419 | diFindFree(le32_to_cpu(iagp->wmap[extno]), | |
1420 | bitno)) | |
1421 | < INOSPEREXT) { | |
1422 | ino = (extno << L2INOSPEREXT) + bitno; | |
1423 | ||
1424 | /* a free inode (bit) was found within this | |
1425 | * extent, so allocate it. | |
1426 | */ | |
1427 | rc = diAllocBit(imap, iagp, ino); | |
1428 | IREAD_UNLOCK(ipimap); | |
1429 | if (rc) { | |
1430 | assert(rc == -EIO); | |
1431 | } else { | |
1432 | /* set the results of the allocation | |
1433 | * and write the iag. | |
1434 | */ | |
1435 | diInitInode(ip, iagno, ino, extno, | |
1436 | iagp); | |
1437 | mark_metapage_dirty(mp); | |
1438 | } | |
1439 | release_metapage(mp); | |
1440 | ||
1441 | /* free the AG lock and return. | |
1442 | */ | |
1443 | AG_UNLOCK(imap, agno); | |
1444 | return (rc); | |
1445 | } | |
1446 | ||
1447 | if (!addext) | |
1448 | extno = | |
1449 | (extno == | |
1450 | EXTSPERIAG - 1) ? 0 : extno + 1; | |
1451 | } | |
1452 | ||
1453 | /* | |
1454 | * no free inodes within the extent containing the hint. | |
1455 | * | |
1456 | * try to allocate from the backed extents following | |
1457 | * hint or, if appropriate (i.e. addext is true), allocate | |
1458 | * an extent of free inodes at or following the extent | |
1459 | * containing the hint. | |
63f83c9f | 1460 | * |
1da177e4 LT |
1461 | * the free inode and free extent summary maps are used |
1462 | * here, so determine the starting summary map position | |
1463 | * and the number of words we'll have to examine. again, | |
1464 | * the approach is to allocate following the hint, so we | |
1465 | * might have to initially ignore prior bits of the summary | |
1466 | * map that represent extents prior to the extent containing | |
1467 | * the hint and later revisit these bits. | |
1468 | */ | |
1469 | bitno = extno & (EXTSPERSUM - 1); | |
1470 | nwords = (bitno == 0) ? SMAPSZ : SMAPSZ + 1; | |
1471 | sword = extno >> L2EXTSPERSUM; | |
1472 | ||
1473 | /* mask any prior bits for the starting words of the | |
1474 | * summary map. | |
1475 | */ | |
9d48017b | 1476 | mask = (bitno == 0) ? 0 : (ONES << (EXTSPERSUM - bitno)); |
1da177e4 LT |
1477 | inosmap = le32_to_cpu(iagp->inosmap[sword]) | mask; |
1478 | extsmap = le32_to_cpu(iagp->extsmap[sword]) | mask; | |
1479 | ||
1480 | /* scan the free inode and free extent summary maps for | |
1481 | * free resources. | |
1482 | */ | |
1483 | for (i = 0; i < nwords; i++) { | |
1484 | /* check if this word of the free inode summary | |
1485 | * map describes an extent with free inodes. | |
1486 | */ | |
1487 | if (~inosmap) { | |
1488 | /* an extent with free inodes has been | |
1489 | * found. determine the extent number | |
1490 | * and the inode number within the extent. | |
1491 | */ | |
1492 | rem = diFindFree(inosmap, 0); | |
1493 | extno = (sword << L2EXTSPERSUM) + rem; | |
1494 | rem = diFindFree(le32_to_cpu(iagp->wmap[extno]), | |
1495 | 0); | |
1496 | if (rem >= INOSPEREXT) { | |
1497 | IREAD_UNLOCK(ipimap); | |
1498 | release_metapage(mp); | |
1499 | AG_UNLOCK(imap, agno); | |
1500 | jfs_error(ip->i_sb, | |
eb8630d7 | 1501 | "can't find free bit in wmap\n"); |
3c65e874 | 1502 | return -EIO; |
1da177e4 LT |
1503 | } |
1504 | ||
1505 | /* determine the inode number within the | |
1506 | * iag and allocate the inode from the | |
1507 | * map. | |
1508 | */ | |
1509 | ino = (extno << L2INOSPEREXT) + rem; | |
1510 | rc = diAllocBit(imap, iagp, ino); | |
1511 | IREAD_UNLOCK(ipimap); | |
1512 | if (rc) | |
1513 | assert(rc == -EIO); | |
1514 | else { | |
1515 | /* set the results of the allocation | |
1516 | * and write the iag. | |
1517 | */ | |
1518 | diInitInode(ip, iagno, ino, extno, | |
1519 | iagp); | |
1520 | mark_metapage_dirty(mp); | |
1521 | } | |
1522 | release_metapage(mp); | |
1523 | ||
1524 | /* free the AG lock and return. | |
1525 | */ | |
1526 | AG_UNLOCK(imap, agno); | |
1527 | return (rc); | |
1528 | ||
1529 | } | |
1530 | ||
1531 | /* check if we may allocate an extent of free | |
1532 | * inodes and whether this word of the free | |
1533 | * extents summary map describes a free extent. | |
1534 | */ | |
1535 | if (addext && ~extsmap) { | |
1536 | /* a free extent has been found. determine | |
1537 | * the extent number. | |
1538 | */ | |
1539 | rem = diFindFree(extsmap, 0); | |
1540 | extno = (sword << L2EXTSPERSUM) + rem; | |
1541 | ||
1542 | /* allocate an extent of free inodes. | |
1543 | */ | |
1544 | if ((rc = diNewExt(imap, iagp, extno))) { | |
1545 | /* if there is no disk space for a | |
1546 | * new extent, try to allocate the | |
1547 | * disk inode from somewhere else. | |
1548 | */ | |
1549 | if (rc == -ENOSPC) | |
1550 | break; | |
1551 | ||
1552 | assert(rc == -EIO); | |
1553 | } else { | |
1554 | /* set the results of the allocation | |
1555 | * and write the iag. | |
1556 | */ | |
1557 | diInitInode(ip, iagno, | |
1558 | extno << L2INOSPEREXT, | |
1559 | extno, iagp); | |
1560 | mark_metapage_dirty(mp); | |
1561 | } | |
1562 | release_metapage(mp); | |
1563 | /* free the imap inode & the AG lock & return. | |
1564 | */ | |
1565 | IREAD_UNLOCK(ipimap); | |
1566 | AG_UNLOCK(imap, agno); | |
1567 | return (rc); | |
1568 | } | |
1569 | ||
1570 | /* move on to the next set of summary map words. | |
1571 | */ | |
1572 | sword = (sword == SMAPSZ - 1) ? 0 : sword + 1; | |
1573 | inosmap = le32_to_cpu(iagp->inosmap[sword]); | |
1574 | extsmap = le32_to_cpu(iagp->extsmap[sword]); | |
1575 | } | |
1576 | } | |
1577 | /* unlock imap inode */ | |
1578 | IREAD_UNLOCK(ipimap); | |
1579 | ||
1580 | /* nothing doing in this iag, so release it. */ | |
1581 | release_metapage(mp); | |
1582 | ||
1583 | tryag: | |
1584 | /* | |
1585 | * try to allocate anywhere within the same AG as the parent inode. | |
1586 | */ | |
1587 | rc = diAllocAG(imap, agno, dir, ip); | |
1588 | ||
1589 | AG_UNLOCK(imap, agno); | |
1590 | ||
1591 | if (rc != -ENOSPC) | |
1592 | return (rc); | |
1593 | ||
1594 | /* | |
1595 | * try to allocate in any AG. | |
1596 | */ | |
1597 | return (diAllocAny(imap, agno, dir, ip)); | |
1598 | } | |
1599 | ||
1600 | ||
1601 | /* | |
f720e3ba | 1602 | * NAME: diAllocAG(imap,agno,dir,ip) |
1da177e4 | 1603 | * |
f720e3ba | 1604 | * FUNCTION: allocate a disk inode from the allocation group. |
1da177e4 LT |
1605 | * |
1606 | * this routine first determines if a new extent of free | |
1607 | * inodes should be added for the allocation group, with | |
1608 | * the current request satisfied from this extent. if this | |
1609 | * is the case, an attempt will be made to do just that. if | |
63f83c9f | 1610 | * this attempt fails or it has been determined that a new |
1da177e4 LT |
1611 | * extent should not be added, an attempt is made to satisfy |
1612 | * the request by allocating an existing (backed) free inode | |
1613 | * from the allocation group. | |
1614 | * | |
1615 | * PRE CONDITION: Already have the AG lock for this AG. | |
1616 | * | |
1617 | * PARAMETERS: | |
f720e3ba DK |
1618 | * imap - pointer to inode map control structure. |
1619 | * agno - allocation group to allocate from. | |
1620 | * dir - 'true' if the new disk inode is for a directory. | |
1621 | * ip - pointer to the new inode to be filled in on successful return | |
1da177e4 LT |
1622 | * with the disk inode number allocated, its extent address |
1623 | * and the start of the ag. | |
1624 | * | |
1625 | * RETURN VALUES: | |
f720e3ba DK |
1626 | * 0 - success. |
1627 | * -ENOSPC - insufficient disk resources. | |
1628 | * -EIO - i/o error. | |
1da177e4 LT |
1629 | */ |
1630 | static int | |
4d81715f | 1631 | diAllocAG(struct inomap * imap, int agno, bool dir, struct inode *ip) |
1da177e4 LT |
1632 | { |
1633 | int rc, addext, numfree, numinos; | |
1634 | ||
63f83c9f | 1635 | /* get the number of free and the number of backed disk |
1da177e4 LT |
1636 | * inodes currently within the ag. |
1637 | */ | |
1638 | numfree = imap->im_agctl[agno].numfree; | |
1639 | numinos = imap->im_agctl[agno].numinos; | |
1640 | ||
1641 | if (numfree > numinos) { | |
eb8630d7 | 1642 | jfs_error(ip->i_sb, "numfree > numinos\n"); |
1da177e4 LT |
1643 | return -EIO; |
1644 | } | |
1645 | ||
1646 | /* determine if we should allocate a new extent of free inodes | |
1647 | * within the ag: for directory inodes, add a new extent | |
1648 | * if there are a small number of free inodes or number of free | |
1649 | * inodes is a small percentage of the number of backed inodes. | |
1650 | */ | |
4d81715f | 1651 | if (dir) |
1da177e4 LT |
1652 | addext = (numfree < 64 || |
1653 | (numfree < 256 | |
1654 | && ((numfree * 100) / numinos) <= 20)); | |
1655 | else | |
1656 | addext = (numfree == 0); | |
1657 | ||
1658 | /* | |
1659 | * try to allocate a new extent of free inodes. | |
1660 | */ | |
1661 | if (addext) { | |
25985edc | 1662 | /* if free space is not available for this new extent, try |
1da177e4 LT |
1663 | * below to allocate a free and existing (already backed) |
1664 | * inode from the ag. | |
1665 | */ | |
1666 | if ((rc = diAllocExt(imap, agno, ip)) != -ENOSPC) | |
1667 | return (rc); | |
1668 | } | |
1669 | ||
1670 | /* | |
1671 | * try to allocate an existing free inode from the ag. | |
1672 | */ | |
1673 | return (diAllocIno(imap, agno, ip)); | |
1674 | } | |
1675 | ||
1676 | ||
1677 | /* | |
f720e3ba | 1678 | * NAME: diAllocAny(imap,agno,dir,iap) |
1da177e4 | 1679 | * |
f720e3ba | 1680 | * FUNCTION: allocate a disk inode from any other allocation group. |
1da177e4 LT |
1681 | * |
1682 | * this routine is called when an allocation attempt within | |
1683 | * the primary allocation group has failed. if attempts to | |
1684 | * allocate an inode from any allocation group other than the | |
1685 | * specified primary group. | |
1686 | * | |
1687 | * PARAMETERS: | |
f720e3ba DK |
1688 | * imap - pointer to inode map control structure. |
1689 | * agno - primary allocation group (to avoid). | |
1690 | * dir - 'true' if the new disk inode is for a directory. | |
1691 | * ip - pointer to a new inode to be filled in on successful return | |
1da177e4 LT |
1692 | * with the disk inode number allocated, its extent address |
1693 | * and the start of the ag. | |
1694 | * | |
1695 | * RETURN VALUES: | |
f720e3ba DK |
1696 | * 0 - success. |
1697 | * -ENOSPC - insufficient disk resources. | |
1698 | * -EIO - i/o error. | |
1da177e4 LT |
1699 | */ |
1700 | static int | |
4d81715f | 1701 | diAllocAny(struct inomap * imap, int agno, bool dir, struct inode *ip) |
1da177e4 LT |
1702 | { |
1703 | int ag, rc; | |
1704 | int maxag = JFS_SBI(imap->im_ipimap->i_sb)->bmap->db_maxag; | |
1705 | ||
1706 | ||
63f83c9f | 1707 | /* try to allocate from the ags following agno up to |
1da177e4 LT |
1708 | * the maximum ag number. |
1709 | */ | |
1710 | for (ag = agno + 1; ag <= maxag; ag++) { | |
1711 | AG_LOCK(imap, ag); | |
1712 | ||
1713 | rc = diAllocAG(imap, ag, dir, ip); | |
1714 | ||
1715 | AG_UNLOCK(imap, ag); | |
1716 | ||
1717 | if (rc != -ENOSPC) | |
1718 | return (rc); | |
1719 | } | |
1720 | ||
1721 | /* try to allocate from the ags in front of agno. | |
1722 | */ | |
1723 | for (ag = 0; ag < agno; ag++) { | |
1724 | AG_LOCK(imap, ag); | |
1725 | ||
1726 | rc = diAllocAG(imap, ag, dir, ip); | |
1727 | ||
1728 | AG_UNLOCK(imap, ag); | |
1729 | ||
1730 | if (rc != -ENOSPC) | |
1731 | return (rc); | |
1732 | } | |
1733 | ||
1734 | /* no free disk inodes. | |
1735 | */ | |
1736 | return -ENOSPC; | |
1737 | } | |
1738 | ||
1739 | ||
1740 | /* | |
f720e3ba | 1741 | * NAME: diAllocIno(imap,agno,ip) |
1da177e4 | 1742 | * |
f720e3ba | 1743 | * FUNCTION: allocate a disk inode from the allocation group's free |
1da177e4 LT |
1744 | * inode list, returning an error if this free list is |
1745 | * empty (i.e. no iags on the list). | |
1746 | * | |
1747 | * allocation occurs from the first iag on the list using | |
1748 | * the iag's free inode summary map to find the leftmost | |
63f83c9f DK |
1749 | * free inode in the iag. |
1750 | * | |
1da177e4 | 1751 | * PRE CONDITION: Already have AG lock for this AG. |
63f83c9f | 1752 | * |
1da177e4 | 1753 | * PARAMETERS: |
f720e3ba DK |
1754 | * imap - pointer to inode map control structure. |
1755 | * agno - allocation group. | |
1756 | * ip - pointer to new inode to be filled in on successful return | |
1da177e4 LT |
1757 | * with the disk inode number allocated, its extent address |
1758 | * and the start of the ag. | |
1759 | * | |
1760 | * RETURN VALUES: | |
f720e3ba DK |
1761 | * 0 - success. |
1762 | * -ENOSPC - insufficient disk resources. | |
1763 | * -EIO - i/o error. | |
1da177e4 LT |
1764 | */ |
1765 | static int diAllocIno(struct inomap * imap, int agno, struct inode *ip) | |
1766 | { | |
1767 | int iagno, ino, rc, rem, extno, sword; | |
1768 | struct metapage *mp; | |
1769 | struct iag *iagp; | |
1770 | ||
1771 | /* check if there are iags on the ag's free inode list. | |
1772 | */ | |
1773 | if ((iagno = imap->im_agctl[agno].inofree) < 0) | |
1774 | return -ENOSPC; | |
1775 | ||
1776 | /* obtain read lock on imap inode */ | |
82d5b9a7 | 1777 | IREAD_LOCK(imap->im_ipimap, RDWRLOCK_IMAP); |
1da177e4 LT |
1778 | |
1779 | /* read the iag at the head of the list. | |
1780 | */ | |
1781 | if ((rc = diIAGRead(imap, iagno, &mp))) { | |
1782 | IREAD_UNLOCK(imap->im_ipimap); | |
1783 | return (rc); | |
1784 | } | |
1785 | iagp = (struct iag *) mp->data; | |
1786 | ||
1787 | /* better be free inodes in this iag if it is on the | |
1788 | * list. | |
1789 | */ | |
1790 | if (!iagp->nfreeinos) { | |
1791 | IREAD_UNLOCK(imap->im_ipimap); | |
1792 | release_metapage(mp); | |
eb8630d7 | 1793 | jfs_error(ip->i_sb, "nfreeinos = 0, but iag on freelist\n"); |
1da177e4 LT |
1794 | return -EIO; |
1795 | } | |
1796 | ||
1797 | /* scan the free inode summary map to find an extent | |
1798 | * with free inodes. | |
1799 | */ | |
1800 | for (sword = 0;; sword++) { | |
1801 | if (sword >= SMAPSZ) { | |
1802 | IREAD_UNLOCK(imap->im_ipimap); | |
1803 | release_metapage(mp); | |
1804 | jfs_error(ip->i_sb, | |
eb8630d7 | 1805 | "free inode not found in summary map\n"); |
1da177e4 LT |
1806 | return -EIO; |
1807 | } | |
1808 | ||
1809 | if (~iagp->inosmap[sword]) | |
1810 | break; | |
1811 | } | |
1812 | ||
1813 | /* found a extent with free inodes. determine | |
1814 | * the extent number. | |
1815 | */ | |
1816 | rem = diFindFree(le32_to_cpu(iagp->inosmap[sword]), 0); | |
1817 | if (rem >= EXTSPERSUM) { | |
1818 | IREAD_UNLOCK(imap->im_ipimap); | |
1819 | release_metapage(mp); | |
eb8630d7 | 1820 | jfs_error(ip->i_sb, "no free extent found\n"); |
1da177e4 LT |
1821 | return -EIO; |
1822 | } | |
1823 | extno = (sword << L2EXTSPERSUM) + rem; | |
1824 | ||
1825 | /* find the first free inode in the extent. | |
1826 | */ | |
1827 | rem = diFindFree(le32_to_cpu(iagp->wmap[extno]), 0); | |
1828 | if (rem >= INOSPEREXT) { | |
1829 | IREAD_UNLOCK(imap->im_ipimap); | |
1830 | release_metapage(mp); | |
eb8630d7 | 1831 | jfs_error(ip->i_sb, "free inode not found\n"); |
1da177e4 LT |
1832 | return -EIO; |
1833 | } | |
1834 | ||
63f83c9f | 1835 | /* compute the inode number within the iag. |
1da177e4 LT |
1836 | */ |
1837 | ino = (extno << L2INOSPEREXT) + rem; | |
1838 | ||
1839 | /* allocate the inode. | |
1840 | */ | |
1841 | rc = diAllocBit(imap, iagp, ino); | |
1842 | IREAD_UNLOCK(imap->im_ipimap); | |
1843 | if (rc) { | |
1844 | release_metapage(mp); | |
1845 | return (rc); | |
1846 | } | |
1847 | ||
1848 | /* set the results of the allocation and write the iag. | |
1849 | */ | |
1850 | diInitInode(ip, iagno, ino, extno, iagp); | |
1851 | write_metapage(mp); | |
1852 | ||
1853 | return (0); | |
1854 | } | |
1855 | ||
1856 | ||
1857 | /* | |
f720e3ba | 1858 | * NAME: diAllocExt(imap,agno,ip) |
1da177e4 | 1859 | * |
63f83c9f DK |
1860 | * FUNCTION: add a new extent of free inodes to an iag, allocating |
1861 | * an inode from this extent to satisfy the current allocation | |
1862 | * request. | |
1863 | * | |
1da177e4 LT |
1864 | * this routine first tries to find an existing iag with free |
1865 | * extents through the ag free extent list. if list is not | |
1866 | * empty, the head of the list will be selected as the home | |
1867 | * of the new extent of free inodes. otherwise (the list is | |
1868 | * empty), a new iag will be allocated for the ag to contain | |
1869 | * the extent. | |
63f83c9f | 1870 | * |
1da177e4 LT |
1871 | * once an iag has been selected, the free extent summary map |
1872 | * is used to locate a free extent within the iag and diNewExt() | |
1873 | * is called to initialize the extent, with initialization | |
1874 | * including the allocation of the first inode of the extent | |
1875 | * for the purpose of satisfying this request. | |
1876 | * | |
1877 | * PARAMETERS: | |
f720e3ba DK |
1878 | * imap - pointer to inode map control structure. |
1879 | * agno - allocation group number. | |
1880 | * ip - pointer to new inode to be filled in on successful return | |
1da177e4 LT |
1881 | * with the disk inode number allocated, its extent address |
1882 | * and the start of the ag. | |
1883 | * | |
1884 | * RETURN VALUES: | |
f720e3ba DK |
1885 | * 0 - success. |
1886 | * -ENOSPC - insufficient disk resources. | |
1887 | * -EIO - i/o error. | |
1da177e4 LT |
1888 | */ |
1889 | static int diAllocExt(struct inomap * imap, int agno, struct inode *ip) | |
1890 | { | |
1891 | int rem, iagno, sword, extno, rc; | |
1892 | struct metapage *mp; | |
1893 | struct iag *iagp; | |
1894 | ||
1895 | /* check if the ag has any iags with free extents. if not, | |
1896 | * allocate a new iag for the ag. | |
1897 | */ | |
1898 | if ((iagno = imap->im_agctl[agno].extfree) < 0) { | |
1899 | /* If successful, diNewIAG will obtain the read lock on the | |
1900 | * imap inode. | |
1901 | */ | |
1902 | if ((rc = diNewIAG(imap, &iagno, agno, &mp))) { | |
1903 | return (rc); | |
1904 | } | |
1905 | iagp = (struct iag *) mp->data; | |
1906 | ||
1907 | /* set the ag number if this a brand new iag | |
1908 | */ | |
1909 | iagp->agstart = | |
1910 | cpu_to_le64(AGTOBLK(agno, imap->im_ipimap)); | |
1911 | } else { | |
1912 | /* read the iag. | |
1913 | */ | |
82d5b9a7 | 1914 | IREAD_LOCK(imap->im_ipimap, RDWRLOCK_IMAP); |
1da177e4 LT |
1915 | if ((rc = diIAGRead(imap, iagno, &mp))) { |
1916 | IREAD_UNLOCK(imap->im_ipimap); | |
eb8630d7 | 1917 | jfs_error(ip->i_sb, "error reading iag\n"); |
1da177e4 LT |
1918 | return rc; |
1919 | } | |
1920 | iagp = (struct iag *) mp->data; | |
1921 | } | |
1922 | ||
1923 | /* using the free extent summary map, find a free extent. | |
1924 | */ | |
1925 | for (sword = 0;; sword++) { | |
1926 | if (sword >= SMAPSZ) { | |
1927 | release_metapage(mp); | |
1928 | IREAD_UNLOCK(imap->im_ipimap); | |
eb8630d7 | 1929 | jfs_error(ip->i_sb, "free ext summary map not found\n"); |
1da177e4 LT |
1930 | return -EIO; |
1931 | } | |
1932 | if (~iagp->extsmap[sword]) | |
1933 | break; | |
1934 | } | |
1935 | ||
1936 | /* determine the extent number of the free extent. | |
1937 | */ | |
1938 | rem = diFindFree(le32_to_cpu(iagp->extsmap[sword]), 0); | |
1939 | if (rem >= EXTSPERSUM) { | |
1940 | release_metapage(mp); | |
1941 | IREAD_UNLOCK(imap->im_ipimap); | |
eb8630d7 | 1942 | jfs_error(ip->i_sb, "free extent not found\n"); |
1da177e4 LT |
1943 | return -EIO; |
1944 | } | |
1945 | extno = (sword << L2EXTSPERSUM) + rem; | |
1946 | ||
1947 | /* initialize the new extent. | |
1948 | */ | |
1949 | rc = diNewExt(imap, iagp, extno); | |
1950 | IREAD_UNLOCK(imap->im_ipimap); | |
1951 | if (rc) { | |
1952 | /* something bad happened. if a new iag was allocated, | |
1953 | * place it back on the inode map's iag free list, and | |
1954 | * clear the ag number information. | |
1955 | */ | |
1956 | if (iagp->nfreeexts == cpu_to_le32(EXTSPERIAG)) { | |
1957 | IAGFREE_LOCK(imap); | |
1958 | iagp->iagfree = cpu_to_le32(imap->im_freeiag); | |
1959 | imap->im_freeiag = iagno; | |
1960 | IAGFREE_UNLOCK(imap); | |
1961 | } | |
1962 | write_metapage(mp); | |
1963 | return (rc); | |
1964 | } | |
1965 | ||
1966 | /* set the results of the allocation and write the iag. | |
1967 | */ | |
1968 | diInitInode(ip, iagno, extno << L2INOSPEREXT, extno, iagp); | |
1969 | ||
1970 | write_metapage(mp); | |
1971 | ||
1972 | return (0); | |
1973 | } | |
1974 | ||
1975 | ||
1976 | /* | |
f720e3ba | 1977 | * NAME: diAllocBit(imap,iagp,ino) |
1da177e4 | 1978 | * |
63f83c9f | 1979 | * FUNCTION: allocate a backed inode from an iag. |
1da177e4 LT |
1980 | * |
1981 | * this routine performs the mechanics of allocating a | |
1982 | * specified inode from a backed extent. | |
1983 | * | |
1984 | * if the inode to be allocated represents the last free | |
1985 | * inode within the iag, the iag will be removed from the | |
1986 | * ag free inode list. | |
1987 | * | |
1988 | * a careful update approach is used to provide consistency | |
1989 | * in the face of updates to multiple buffers. under this | |
1990 | * approach, all required buffers are obtained before making | |
1991 | * any updates and are held all are updates are complete. | |
63f83c9f | 1992 | * |
1da177e4 LT |
1993 | * PRE CONDITION: Already have buffer lock on iagp. Already have AG lock on |
1994 | * this AG. Must have read lock on imap inode. | |
1995 | * | |
1996 | * PARAMETERS: | |
f720e3ba DK |
1997 | * imap - pointer to inode map control structure. |
1998 | * iagp - pointer to iag. | |
1999 | * ino - inode number to be allocated within the iag. | |
1da177e4 LT |
2000 | * |
2001 | * RETURN VALUES: | |
f720e3ba DK |
2002 | * 0 - success. |
2003 | * -ENOSPC - insufficient disk resources. | |
2004 | * -EIO - i/o error. | |
1da177e4 LT |
2005 | */ |
2006 | static int diAllocBit(struct inomap * imap, struct iag * iagp, int ino) | |
2007 | { | |
2008 | int extno, bitno, agno, sword, rc; | |
2009 | struct metapage *amp = NULL, *bmp = NULL; | |
2010 | struct iag *aiagp = NULL, *biagp = NULL; | |
2011 | u32 mask; | |
2012 | ||
2013 | /* check if this is the last free inode within the iag. | |
2014 | * if so, it will have to be removed from the ag free | |
25985edc | 2015 | * inode list, so get the iags preceding and following |
1da177e4 LT |
2016 | * it on the list. |
2017 | */ | |
2018 | if (iagp->nfreeinos == cpu_to_le32(1)) { | |
2019 | if ((int) le32_to_cpu(iagp->inofreefwd) >= 0) { | |
2020 | if ((rc = | |
2021 | diIAGRead(imap, le32_to_cpu(iagp->inofreefwd), | |
2022 | &))) | |
2023 | return (rc); | |
2024 | aiagp = (struct iag *) amp->data; | |
2025 | } | |
2026 | ||
2027 | if ((int) le32_to_cpu(iagp->inofreeback) >= 0) { | |
2028 | if ((rc = | |
2029 | diIAGRead(imap, | |
2030 | le32_to_cpu(iagp->inofreeback), | |
2031 | &bmp))) { | |
2032 | if (amp) | |
2033 | release_metapage(amp); | |
2034 | return (rc); | |
2035 | } | |
2036 | biagp = (struct iag *) bmp->data; | |
2037 | } | |
2038 | } | |
2039 | ||
2040 | /* get the ag number, extent number, inode number within | |
2041 | * the extent. | |
2042 | */ | |
2043 | agno = BLKTOAG(le64_to_cpu(iagp->agstart), JFS_SBI(imap->im_ipimap->i_sb)); | |
2044 | extno = ino >> L2INOSPEREXT; | |
2045 | bitno = ino & (INOSPEREXT - 1); | |
2046 | ||
2047 | /* compute the mask for setting the map. | |
2048 | */ | |
2049 | mask = HIGHORDER >> bitno; | |
2050 | ||
2051 | /* the inode should be free and backed. | |
2052 | */ | |
2053 | if (((le32_to_cpu(iagp->pmap[extno]) & mask) != 0) || | |
2054 | ((le32_to_cpu(iagp->wmap[extno]) & mask) != 0) || | |
2055 | (addressPXD(&iagp->inoext[extno]) == 0)) { | |
2056 | if (amp) | |
2057 | release_metapage(amp); | |
2058 | if (bmp) | |
2059 | release_metapage(bmp); | |
2060 | ||
eb8630d7 | 2061 | jfs_error(imap->im_ipimap->i_sb, "iag inconsistent\n"); |
1da177e4 LT |
2062 | return -EIO; |
2063 | } | |
2064 | ||
2065 | /* mark the inode as allocated in the working map. | |
2066 | */ | |
2067 | iagp->wmap[extno] |= cpu_to_le32(mask); | |
2068 | ||
2069 | /* check if all inodes within the extent are now | |
2070 | * allocated. if so, update the free inode summary | |
2071 | * map to reflect this. | |
2072 | */ | |
2073 | if (iagp->wmap[extno] == cpu_to_le32(ONES)) { | |
2074 | sword = extno >> L2EXTSPERSUM; | |
2075 | bitno = extno & (EXTSPERSUM - 1); | |
2076 | iagp->inosmap[sword] |= cpu_to_le32(HIGHORDER >> bitno); | |
2077 | } | |
2078 | ||
2079 | /* if this was the last free inode in the iag, remove the | |
2080 | * iag from the ag free inode list. | |
2081 | */ | |
2082 | if (iagp->nfreeinos == cpu_to_le32(1)) { | |
2083 | if (amp) { | |
2084 | aiagp->inofreeback = iagp->inofreeback; | |
2085 | write_metapage(amp); | |
2086 | } | |
2087 | ||
2088 | if (bmp) { | |
2089 | biagp->inofreefwd = iagp->inofreefwd; | |
2090 | write_metapage(bmp); | |
2091 | } else { | |
2092 | imap->im_agctl[agno].inofree = | |
2093 | le32_to_cpu(iagp->inofreefwd); | |
2094 | } | |
2095 | iagp->inofreefwd = iagp->inofreeback = cpu_to_le32(-1); | |
2096 | } | |
2097 | ||
2098 | /* update the free inode count at the iag, ag, inode | |
2099 | * map levels. | |
2100 | */ | |
89145622 | 2101 | le32_add_cpu(&iagp->nfreeinos, -1); |
1da177e4 LT |
2102 | imap->im_agctl[agno].numfree -= 1; |
2103 | atomic_dec(&imap->im_numfree); | |
2104 | ||
2105 | return (0); | |
2106 | } | |
2107 | ||
2108 | ||
2109 | /* | |
f720e3ba | 2110 | * NAME: diNewExt(imap,iagp,extno) |
1da177e4 | 2111 | * |
f720e3ba DK |
2112 | * FUNCTION: initialize a new extent of inodes for an iag, allocating |
2113 | * the first inode of the extent for use for the current | |
2114 | * allocation request. | |
1da177e4 LT |
2115 | * |
2116 | * disk resources are allocated for the new extent of inodes | |
2117 | * and the inodes themselves are initialized to reflect their | |
2118 | * existence within the extent (i.e. their inode numbers and | |
2119 | * inode extent addresses are set) and their initial state | |
2120 | * (mode and link count are set to zero). | |
2121 | * | |
2122 | * if the iag is new, it is not yet on an ag extent free list | |
2123 | * but will now be placed on this list. | |
2124 | * | |
2125 | * if the allocation of the new extent causes the iag to | |
2126 | * have no free extent, the iag will be removed from the | |
2127 | * ag extent free list. | |
2128 | * | |
2129 | * if the iag has no free backed inodes, it will be placed | |
2130 | * on the ag free inode list, since the addition of the new | |
2131 | * extent will now cause it to have free inodes. | |
2132 | * | |
2133 | * a careful update approach is used to provide consistency | |
2134 | * (i.e. list consistency) in the face of updates to multiple | |
2135 | * buffers. under this approach, all required buffers are | |
2136 | * obtained before making any updates and are held until all | |
2137 | * updates are complete. | |
63f83c9f | 2138 | * |
1da177e4 LT |
2139 | * PRE CONDITION: Already have buffer lock on iagp. Already have AG lock on |
2140 | * this AG. Must have read lock on imap inode. | |
2141 | * | |
2142 | * PARAMETERS: | |
f720e3ba DK |
2143 | * imap - pointer to inode map control structure. |
2144 | * iagp - pointer to iag. | |
2145 | * extno - extent number. | |
1da177e4 LT |
2146 | * |
2147 | * RETURN VALUES: | |
f720e3ba DK |
2148 | * 0 - success. |
2149 | * -ENOSPC - insufficient disk resources. | |
2150 | * -EIO - i/o error. | |
1da177e4 LT |
2151 | */ |
2152 | static int diNewExt(struct inomap * imap, struct iag * iagp, int extno) | |
2153 | { | |
2154 | int agno, iagno, fwd, back, freei = 0, sword, rc; | |
2155 | struct iag *aiagp = NULL, *biagp = NULL, *ciagp = NULL; | |
2156 | struct metapage *amp, *bmp, *cmp, *dmp; | |
2157 | struct inode *ipimap; | |
2158 | s64 blkno, hint; | |
2159 | int i, j; | |
2160 | u32 mask; | |
2161 | ino_t ino; | |
2162 | struct dinode *dp; | |
2163 | struct jfs_sb_info *sbi; | |
2164 | ||
2165 | /* better have free extents. | |
2166 | */ | |
2167 | if (!iagp->nfreeexts) { | |
eb8630d7 | 2168 | jfs_error(imap->im_ipimap->i_sb, "no free extents\n"); |
1da177e4 LT |
2169 | return -EIO; |
2170 | } | |
2171 | ||
2172 | /* get the inode map inode. | |
2173 | */ | |
2174 | ipimap = imap->im_ipimap; | |
2175 | sbi = JFS_SBI(ipimap->i_sb); | |
2176 | ||
2177 | amp = bmp = cmp = NULL; | |
2178 | ||
2179 | /* get the ag and iag numbers for this iag. | |
2180 | */ | |
2181 | agno = BLKTOAG(le64_to_cpu(iagp->agstart), sbi); | |
49f9637a EAD |
2182 | if (agno >= MAXAG || agno < 0) |
2183 | return -EIO; | |
2184 | ||
1da177e4 LT |
2185 | iagno = le32_to_cpu(iagp->iagnum); |
2186 | ||
2187 | /* check if this is the last free extent within the | |
2188 | * iag. if so, the iag must be removed from the ag | |
25985edc | 2189 | * free extent list, so get the iags preceding and |
1da177e4 LT |
2190 | * following the iag on this list. |
2191 | */ | |
2192 | if (iagp->nfreeexts == cpu_to_le32(1)) { | |
2193 | if ((fwd = le32_to_cpu(iagp->extfreefwd)) >= 0) { | |
2194 | if ((rc = diIAGRead(imap, fwd, &))) | |
2195 | return (rc); | |
2196 | aiagp = (struct iag *) amp->data; | |
2197 | } | |
2198 | ||
2199 | if ((back = le32_to_cpu(iagp->extfreeback)) >= 0) { | |
2200 | if ((rc = diIAGRead(imap, back, &bmp))) | |
2201 | goto error_out; | |
2202 | biagp = (struct iag *) bmp->data; | |
2203 | } | |
2204 | } else { | |
2205 | /* the iag has free extents. if all extents are free | |
2206 | * (as is the case for a newly allocated iag), the iag | |
2207 | * must be added to the ag free extent list, so get | |
2208 | * the iag at the head of the list in preparation for | |
2209 | * adding this iag to this list. | |
2210 | */ | |
2211 | fwd = back = -1; | |
2212 | if (iagp->nfreeexts == cpu_to_le32(EXTSPERIAG)) { | |
2213 | if ((fwd = imap->im_agctl[agno].extfree) >= 0) { | |
2214 | if ((rc = diIAGRead(imap, fwd, &))) | |
2215 | goto error_out; | |
2216 | aiagp = (struct iag *) amp->data; | |
2217 | } | |
2218 | } | |
2219 | } | |
2220 | ||
2221 | /* check if the iag has no free inodes. if so, the iag | |
2222 | * will have to be added to the ag free inode list, so get | |
2223 | * the iag at the head of the list in preparation for | |
2224 | * adding this iag to this list. in doing this, we must | |
2225 | * check if we already have the iag at the head of | |
2226 | * the list in hand. | |
2227 | */ | |
2228 | if (iagp->nfreeinos == 0) { | |
2229 | freei = imap->im_agctl[agno].inofree; | |
2230 | ||
2231 | if (freei >= 0) { | |
2232 | if (freei == fwd) { | |
2233 | ciagp = aiagp; | |
2234 | } else if (freei == back) { | |
2235 | ciagp = biagp; | |
2236 | } else { | |
2237 | if ((rc = diIAGRead(imap, freei, &cmp))) | |
2238 | goto error_out; | |
2239 | ciagp = (struct iag *) cmp->data; | |
2240 | } | |
2241 | if (ciagp == NULL) { | |
2242 | jfs_error(imap->im_ipimap->i_sb, | |
eb8630d7 | 2243 | "ciagp == NULL\n"); |
1da177e4 LT |
2244 | rc = -EIO; |
2245 | goto error_out; | |
2246 | } | |
2247 | } | |
2248 | } | |
2249 | ||
2250 | /* allocate disk space for the inode extent. | |
2251 | */ | |
2252 | if ((extno == 0) || (addressPXD(&iagp->inoext[extno - 1]) == 0)) | |
2253 | hint = ((s64) agno << sbi->bmap->db_agl2size) - 1; | |
2254 | else | |
2255 | hint = addressPXD(&iagp->inoext[extno - 1]) + | |
2256 | lengthPXD(&iagp->inoext[extno - 1]) - 1; | |
2257 | ||
2258 | if ((rc = dbAlloc(ipimap, hint, (s64) imap->im_nbperiext, &blkno))) | |
2259 | goto error_out; | |
2260 | ||
2261 | /* compute the inode number of the first inode within the | |
2262 | * extent. | |
2263 | */ | |
2264 | ino = (iagno << L2INOSPERIAG) + (extno << L2INOSPEREXT); | |
2265 | ||
2266 | /* initialize the inodes within the newly allocated extent a | |
2267 | * page at a time. | |
2268 | */ | |
2269 | for (i = 0; i < imap->im_nbperiext; i += sbi->nbperpage) { | |
2270 | /* get a buffer for this page of disk inodes. | |
2271 | */ | |
2272 | dmp = get_metapage(ipimap, blkno + i, PSIZE, 1); | |
2273 | if (dmp == NULL) { | |
2274 | rc = -EIO; | |
2275 | goto error_out; | |
2276 | } | |
2277 | dp = (struct dinode *) dmp->data; | |
2278 | ||
2279 | /* initialize the inode number, mode, link count and | |
2280 | * inode extent address. | |
2281 | */ | |
2282 | for (j = 0; j < INOSPERPAGE; j++, dp++, ino++) { | |
2283 | dp->di_inostamp = cpu_to_le32(sbi->inostamp); | |
2284 | dp->di_number = cpu_to_le32(ino); | |
2285 | dp->di_fileset = cpu_to_le32(FILESYSTEM_I); | |
2286 | dp->di_mode = 0; | |
2287 | dp->di_nlink = 0; | |
2288 | PXDaddress(&(dp->di_ixpxd), blkno); | |
2289 | PXDlength(&(dp->di_ixpxd), imap->im_nbperiext); | |
2290 | } | |
2291 | write_metapage(dmp); | |
2292 | } | |
2293 | ||
2294 | /* if this is the last free extent within the iag, remove the | |
2295 | * iag from the ag free extent list. | |
2296 | */ | |
2297 | if (iagp->nfreeexts == cpu_to_le32(1)) { | |
2298 | if (fwd >= 0) | |
2299 | aiagp->extfreeback = iagp->extfreeback; | |
2300 | ||
2301 | if (back >= 0) | |
2302 | biagp->extfreefwd = iagp->extfreefwd; | |
2303 | else | |
2304 | imap->im_agctl[agno].extfree = | |
2305 | le32_to_cpu(iagp->extfreefwd); | |
2306 | ||
2307 | iagp->extfreefwd = iagp->extfreeback = cpu_to_le32(-1); | |
2308 | } else { | |
2309 | /* if the iag has all free extents (newly allocated iag), | |
2310 | * add the iag to the ag free extent list. | |
2311 | */ | |
2312 | if (iagp->nfreeexts == cpu_to_le32(EXTSPERIAG)) { | |
2313 | if (fwd >= 0) | |
2314 | aiagp->extfreeback = cpu_to_le32(iagno); | |
2315 | ||
2316 | iagp->extfreefwd = cpu_to_le32(fwd); | |
2317 | iagp->extfreeback = cpu_to_le32(-1); | |
2318 | imap->im_agctl[agno].extfree = iagno; | |
2319 | } | |
2320 | } | |
2321 | ||
2322 | /* if the iag has no free inodes, add the iag to the | |
2323 | * ag free inode list. | |
2324 | */ | |
2325 | if (iagp->nfreeinos == 0) { | |
2326 | if (freei >= 0) | |
2327 | ciagp->inofreeback = cpu_to_le32(iagno); | |
2328 | ||
2329 | iagp->inofreefwd = | |
2330 | cpu_to_le32(imap->im_agctl[agno].inofree); | |
2331 | iagp->inofreeback = cpu_to_le32(-1); | |
2332 | imap->im_agctl[agno].inofree = iagno; | |
2333 | } | |
2334 | ||
2335 | /* initialize the extent descriptor of the extent. */ | |
2336 | PXDlength(&iagp->inoext[extno], imap->im_nbperiext); | |
2337 | PXDaddress(&iagp->inoext[extno], blkno); | |
2338 | ||
2339 | /* initialize the working and persistent map of the extent. | |
2340 | * the working map will be initialized such that | |
2341 | * it indicates the first inode of the extent is allocated. | |
2342 | */ | |
2343 | iagp->wmap[extno] = cpu_to_le32(HIGHORDER); | |
2344 | iagp->pmap[extno] = 0; | |
2345 | ||
2346 | /* update the free inode and free extent summary maps | |
2347 | * for the extent to indicate the extent has free inodes | |
2348 | * and no longer represents a free extent. | |
2349 | */ | |
2350 | sword = extno >> L2EXTSPERSUM; | |
2351 | mask = HIGHORDER >> (extno & (EXTSPERSUM - 1)); | |
2352 | iagp->extsmap[sword] |= cpu_to_le32(mask); | |
2353 | iagp->inosmap[sword] &= cpu_to_le32(~mask); | |
2354 | ||
2355 | /* update the free inode and free extent counts for the | |
2356 | * iag. | |
2357 | */ | |
89145622 MS |
2358 | le32_add_cpu(&iagp->nfreeinos, (INOSPEREXT - 1)); |
2359 | le32_add_cpu(&iagp->nfreeexts, -1); | |
1da177e4 LT |
2360 | |
2361 | /* update the free and backed inode counts for the ag. | |
2362 | */ | |
2363 | imap->im_agctl[agno].numfree += (INOSPEREXT - 1); | |
2364 | imap->im_agctl[agno].numinos += INOSPEREXT; | |
2365 | ||
2366 | /* update the free and backed inode counts for the inode map. | |
2367 | */ | |
2368 | atomic_add(INOSPEREXT - 1, &imap->im_numfree); | |
2369 | atomic_add(INOSPEREXT, &imap->im_numinos); | |
2370 | ||
2371 | /* write the iags. | |
2372 | */ | |
2373 | if (amp) | |
2374 | write_metapage(amp); | |
2375 | if (bmp) | |
2376 | write_metapage(bmp); | |
2377 | if (cmp) | |
2378 | write_metapage(cmp); | |
2379 | ||
2380 | return (0); | |
2381 | ||
2382 | error_out: | |
2383 | ||
2384 | /* release the iags. | |
2385 | */ | |
2386 | if (amp) | |
2387 | release_metapage(amp); | |
2388 | if (bmp) | |
2389 | release_metapage(bmp); | |
2390 | if (cmp) | |
2391 | release_metapage(cmp); | |
2392 | ||
2393 | return (rc); | |
2394 | } | |
2395 | ||
2396 | ||
2397 | /* | |
f720e3ba | 2398 | * NAME: diNewIAG(imap,iagnop,agno) |
1da177e4 | 2399 | * |
63f83c9f DK |
2400 | * FUNCTION: allocate a new iag for an allocation group. |
2401 | * | |
2402 | * first tries to allocate the iag from the inode map | |
2403 | * iagfree list: | |
2404 | * if the list has free iags, the head of the list is removed | |
1da177e4 LT |
2405 | * and returned to satisfy the request. |
2406 | * if the inode map's iag free list is empty, the inode map | |
2407 | * is extended to hold a new iag. this new iag is initialized | |
2408 | * and returned to satisfy the request. | |
2409 | * | |
2410 | * PARAMETERS: | |
f720e3ba DK |
2411 | * imap - pointer to inode map control structure. |
2412 | * iagnop - pointer to an iag number set with the number of the | |
1da177e4 | 2413 | * newly allocated iag upon successful return. |
f720e3ba | 2414 | * agno - allocation group number. |
1da177e4 LT |
2415 | * bpp - Buffer pointer to be filled in with new IAG's buffer |
2416 | * | |
2417 | * RETURN VALUES: | |
f720e3ba DK |
2418 | * 0 - success. |
2419 | * -ENOSPC - insufficient disk resources. | |
2420 | * -EIO - i/o error. | |
1da177e4 | 2421 | * |
63f83c9f | 2422 | * serialization: |
1da177e4 LT |
2423 | * AG lock held on entry/exit; |
2424 | * write lock on the map is held inside; | |
2425 | * read lock on the map is held on successful completion; | |
2426 | * | |
63f83c9f | 2427 | * note: new iag transaction: |
1da177e4 | 2428 | * . synchronously write iag; |
f720e3ba | 2429 | * . write log of xtree and inode of imap; |
1da177e4 LT |
2430 | * . commit; |
2431 | * . synchronous write of xtree (right to left, bottom to top); | |
2432 | * . at start of logredo(): init in-memory imap with one additional iag page; | |
2433 | * . at end of logredo(): re-read imap inode to determine | |
2434 | * new imap size; | |
2435 | */ | |
2436 | static int | |
2437 | diNewIAG(struct inomap * imap, int *iagnop, int agno, struct metapage ** mpp) | |
2438 | { | |
2439 | int rc; | |
2440 | int iagno, i, xlen; | |
2441 | struct inode *ipimap; | |
2442 | struct super_block *sb; | |
2443 | struct jfs_sb_info *sbi; | |
2444 | struct metapage *mp; | |
2445 | struct iag *iagp; | |
2446 | s64 xaddr = 0; | |
2447 | s64 blkno; | |
2448 | tid_t tid; | |
1da177e4 LT |
2449 | struct inode *iplist[1]; |
2450 | ||
2451 | /* pick up pointers to the inode map and mount inodes */ | |
2452 | ipimap = imap->im_ipimap; | |
2453 | sb = ipimap->i_sb; | |
2454 | sbi = JFS_SBI(sb); | |
2455 | ||
2456 | /* acquire the free iag lock */ | |
2457 | IAGFREE_LOCK(imap); | |
2458 | ||
63f83c9f | 2459 | /* if there are any iags on the inode map free iag list, |
1da177e4 LT |
2460 | * allocate the iag from the head of the list. |
2461 | */ | |
2462 | if (imap->im_freeiag >= 0) { | |
2463 | /* pick up the iag number at the head of the list */ | |
2464 | iagno = imap->im_freeiag; | |
2465 | ||
2466 | /* determine the logical block number of the iag */ | |
2467 | blkno = IAGTOLBLK(iagno, sbi->l2nbperpage); | |
2468 | } else { | |
2469 | /* no free iags. the inode map will have to be extented | |
2470 | * to include a new iag. | |
2471 | */ | |
2472 | ||
2473 | /* acquire inode map lock */ | |
82d5b9a7 | 2474 | IWRITE_LOCK(ipimap, RDWRLOCK_IMAP); |
1da177e4 LT |
2475 | |
2476 | if (ipimap->i_size >> L2PSIZE != imap->im_nextiag + 1) { | |
2477 | IWRITE_UNLOCK(ipimap); | |
2478 | IAGFREE_UNLOCK(imap); | |
2479 | jfs_error(imap->im_ipimap->i_sb, | |
eb8630d7 | 2480 | "ipimap->i_size is wrong\n"); |
1da177e4 LT |
2481 | return -EIO; |
2482 | } | |
2483 | ||
2484 | ||
25985edc | 2485 | /* get the next available iag number */ |
1da177e4 LT |
2486 | iagno = imap->im_nextiag; |
2487 | ||
2488 | /* make sure that we have not exceeded the maximum inode | |
2489 | * number limit. | |
2490 | */ | |
2491 | if (iagno > (MAXIAGS - 1)) { | |
2492 | /* release the inode map lock */ | |
2493 | IWRITE_UNLOCK(ipimap); | |
2494 | ||
2495 | rc = -ENOSPC; | |
2496 | goto out; | |
2497 | } | |
2498 | ||
2499 | /* | |
2500 | * synchronously append new iag page. | |
2501 | */ | |
2502 | /* determine the logical address of iag page to append */ | |
2503 | blkno = IAGTOLBLK(iagno, sbi->l2nbperpage); | |
2504 | ||
2505 | /* Allocate extent for new iag page */ | |
2506 | xlen = sbi->nbperpage; | |
2507 | if ((rc = dbAlloc(ipimap, 0, (s64) xlen, &xaddr))) { | |
2508 | /* release the inode map lock */ | |
2509 | IWRITE_UNLOCK(ipimap); | |
2510 | ||
2511 | goto out; | |
2512 | } | |
2513 | ||
d2e83707 DK |
2514 | /* |
2515 | * start transaction of update of the inode map | |
2516 | * addressing structure pointing to the new iag page; | |
2517 | */ | |
2518 | tid = txBegin(sb, COMMIT_FORCE); | |
1de87444 | 2519 | mutex_lock(&JFS_IP(ipimap)->commit_mutex); |
d2e83707 DK |
2520 | |
2521 | /* update the inode map addressing structure to point to it */ | |
2522 | if ((rc = | |
2523 | xtInsert(tid, ipimap, 0, blkno, xlen, &xaddr, 0))) { | |
2524 | txEnd(tid); | |
1de87444 | 2525 | mutex_unlock(&JFS_IP(ipimap)->commit_mutex); |
1da177e4 LT |
2526 | /* Free the blocks allocated for the iag since it was |
2527 | * not successfully added to the inode map | |
2528 | */ | |
2529 | dbFree(ipimap, xaddr, (s64) xlen); | |
2530 | ||
2531 | /* release the inode map lock */ | |
2532 | IWRITE_UNLOCK(ipimap); | |
2533 | ||
d2e83707 DK |
2534 | goto out; |
2535 | } | |
2536 | ||
2537 | /* update the inode map's inode to reflect the extension */ | |
2538 | ipimap->i_size += PSIZE; | |
2539 | inode_add_bytes(ipimap, PSIZE); | |
2540 | ||
2541 | /* assign a buffer for the page */ | |
2542 | mp = get_metapage(ipimap, blkno, PSIZE, 0); | |
2543 | if (!mp) { | |
2544 | /* | |
2545 | * This is very unlikely since we just created the | |
2546 | * extent, but let's try to handle it correctly | |
2547 | */ | |
2548 | xtTruncate(tid, ipimap, ipimap->i_size - PSIZE, | |
2549 | COMMIT_PWMAP); | |
2550 | ||
2551 | txAbort(tid, 0); | |
2552 | txEnd(tid); | |
79f52b77 | 2553 | mutex_unlock(&JFS_IP(ipimap)->commit_mutex); |
d2e83707 DK |
2554 | |
2555 | /* release the inode map lock */ | |
2556 | IWRITE_UNLOCK(ipimap); | |
2557 | ||
1da177e4 LT |
2558 | rc = -EIO; |
2559 | goto out; | |
2560 | } | |
2561 | iagp = (struct iag *) mp->data; | |
2562 | ||
2563 | /* init the iag */ | |
2564 | memset(iagp, 0, sizeof(struct iag)); | |
2565 | iagp->iagnum = cpu_to_le32(iagno); | |
2566 | iagp->inofreefwd = iagp->inofreeback = cpu_to_le32(-1); | |
2567 | iagp->extfreefwd = iagp->extfreeback = cpu_to_le32(-1); | |
2568 | iagp->iagfree = cpu_to_le32(-1); | |
2569 | iagp->nfreeinos = 0; | |
2570 | iagp->nfreeexts = cpu_to_le32(EXTSPERIAG); | |
2571 | ||
2572 | /* initialize the free inode summary map (free extent | |
2573 | * summary map initialization handled by bzero). | |
2574 | */ | |
2575 | for (i = 0; i < SMAPSZ; i++) | |
2576 | iagp->inosmap[i] = cpu_to_le32(ONES); | |
2577 | ||
2578 | /* | |
d2e83707 | 2579 | * Write and sync the metapage |
1da177e4 | 2580 | */ |
1da177e4 LT |
2581 | flush_metapage(mp); |
2582 | ||
1da177e4 | 2583 | /* |
63f83c9f DK |
2584 | * txCommit(COMMIT_FORCE) will synchronously write address |
2585 | * index pages and inode after commit in careful update order | |
1da177e4 LT |
2586 | * of address index pages (right to left, bottom up); |
2587 | */ | |
2588 | iplist[0] = ipimap; | |
2589 | rc = txCommit(tid, 1, &iplist[0], COMMIT_FORCE); | |
2590 | ||
2591 | txEnd(tid); | |
1de87444 | 2592 | mutex_unlock(&JFS_IP(ipimap)->commit_mutex); |
1da177e4 LT |
2593 | |
2594 | duplicateIXtree(sb, blkno, xlen, &xaddr); | |
2595 | ||
25985edc | 2596 | /* update the next available iag number */ |
1da177e4 LT |
2597 | imap->im_nextiag += 1; |
2598 | ||
2599 | /* Add the iag to the iag free list so we don't lose the iag | |
2600 | * if a failure happens now. | |
2601 | */ | |
2602 | imap->im_freeiag = iagno; | |
2603 | ||
2604 | /* Until we have logredo working, we want the imap inode & | |
2605 | * control page to be up to date. | |
2606 | */ | |
2607 | diSync(ipimap); | |
2608 | ||
2609 | /* release the inode map lock */ | |
2610 | IWRITE_UNLOCK(ipimap); | |
2611 | } | |
2612 | ||
2613 | /* obtain read lock on map */ | |
82d5b9a7 | 2614 | IREAD_LOCK(ipimap, RDWRLOCK_IMAP); |
1da177e4 LT |
2615 | |
2616 | /* read the iag */ | |
2617 | if ((rc = diIAGRead(imap, iagno, &mp))) { | |
2618 | IREAD_UNLOCK(ipimap); | |
2619 | rc = -EIO; | |
2620 | goto out; | |
2621 | } | |
2622 | iagp = (struct iag *) mp->data; | |
2623 | ||
2624 | /* remove the iag from the iag free list */ | |
2625 | imap->im_freeiag = le32_to_cpu(iagp->iagfree); | |
2626 | iagp->iagfree = cpu_to_le32(-1); | |
2627 | ||
2628 | /* set the return iag number and buffer pointer */ | |
2629 | *iagnop = iagno; | |
2630 | *mpp = mp; | |
2631 | ||
2632 | out: | |
2633 | /* release the iag free lock */ | |
2634 | IAGFREE_UNLOCK(imap); | |
2635 | ||
2636 | return (rc); | |
2637 | } | |
2638 | ||
2639 | /* | |
f720e3ba | 2640 | * NAME: diIAGRead() |
1da177e4 | 2641 | * |
f720e3ba | 2642 | * FUNCTION: get the buffer for the specified iag within a fileset |
1da177e4 | 2643 | * or aggregate inode map. |
63f83c9f | 2644 | * |
1da177e4 | 2645 | * PARAMETERS: |
f720e3ba DK |
2646 | * imap - pointer to inode map control structure. |
2647 | * iagno - iag number. | |
2648 | * bpp - point to buffer pointer to be filled in on successful | |
1da177e4 LT |
2649 | * exit. |
2650 | * | |
2651 | * SERIALIZATION: | |
2652 | * must have read lock on imap inode | |
2653 | * (When called by diExtendFS, the filesystem is quiesced, therefore | |
2654 | * the read lock is unnecessary.) | |
2655 | * | |
2656 | * RETURN VALUES: | |
f720e3ba DK |
2657 | * 0 - success. |
2658 | * -EIO - i/o error. | |
1da177e4 LT |
2659 | */ |
2660 | static int diIAGRead(struct inomap * imap, int iagno, struct metapage ** mpp) | |
2661 | { | |
2662 | struct inode *ipimap = imap->im_ipimap; | |
2663 | s64 blkno; | |
2664 | ||
2665 | /* compute the logical block number of the iag. */ | |
2666 | blkno = IAGTOLBLK(iagno, JFS_SBI(ipimap->i_sb)->l2nbperpage); | |
2667 | ||
2668 | /* read the iag. */ | |
2669 | *mpp = read_metapage(ipimap, blkno, PSIZE, 0); | |
2670 | if (*mpp == NULL) { | |
2671 | return -EIO; | |
2672 | } | |
2673 | ||
2674 | return (0); | |
2675 | } | |
2676 | ||
2677 | /* | |
f720e3ba | 2678 | * NAME: diFindFree() |
1da177e4 | 2679 | * |
f720e3ba | 2680 | * FUNCTION: find the first free bit in a word starting at |
1da177e4 LT |
2681 | * the specified bit position. |
2682 | * | |
2683 | * PARAMETERS: | |
f720e3ba DK |
2684 | * word - word to be examined. |
2685 | * start - starting bit position. | |
1da177e4 LT |
2686 | * |
2687 | * RETURN VALUES: | |
f720e3ba | 2688 | * bit position of first free bit in the word or 32 if |
1da177e4 LT |
2689 | * no free bits were found. |
2690 | */ | |
2691 | static int diFindFree(u32 word, int start) | |
2692 | { | |
2693 | int bitno; | |
2694 | assert(start < 32); | |
2695 | /* scan the word for the first free bit. */ | |
2696 | for (word <<= start, bitno = start; bitno < 32; | |
2697 | bitno++, word <<= 1) { | |
2698 | if ((word & HIGHORDER) == 0) | |
2699 | break; | |
2700 | } | |
2701 | return (bitno); | |
2702 | } | |
2703 | ||
2704 | /* | |
2705 | * NAME: diUpdatePMap() | |
63f83c9f DK |
2706 | * |
2707 | * FUNCTION: Update the persistent map in an IAG for the allocation or | |
1da177e4 | 2708 | * freeing of the specified inode. |
63f83c9f | 2709 | * |
1da177e4 LT |
2710 | * PRE CONDITIONS: Working map has already been updated for allocate. |
2711 | * | |
2712 | * PARAMETERS: | |
2713 | * ipimap - Incore inode map inode | |
2714 | * inum - Number of inode to mark in permanent map | |
4d81715f | 2715 | * is_free - If 'true' indicates inode should be marked freed, otherwise |
1da177e4 LT |
2716 | * indicates inode should be marked allocated. |
2717 | * | |
63f83c9f | 2718 | * RETURN VALUES: |
1da177e4 LT |
2719 | * 0 for success |
2720 | */ | |
2721 | int | |
2722 | diUpdatePMap(struct inode *ipimap, | |
4d81715f | 2723 | unsigned long inum, bool is_free, struct tblock * tblk) |
1da177e4 LT |
2724 | { |
2725 | int rc; | |
2726 | struct iag *iagp; | |
2727 | struct metapage *mp; | |
2728 | int iagno, ino, extno, bitno; | |
2729 | struct inomap *imap; | |
2730 | u32 mask; | |
2731 | struct jfs_log *log; | |
2732 | int lsn, difft, diffp; | |
7fab479b | 2733 | unsigned long flags; |
1da177e4 LT |
2734 | |
2735 | imap = JFS_IP(ipimap)->i_imap; | |
2736 | /* get the iag number containing the inode */ | |
2737 | iagno = INOTOIAG(inum); | |
2738 | /* make sure that the iag is contained within the map */ | |
2739 | if (iagno >= imap->im_nextiag) { | |
eb8630d7 | 2740 | jfs_error(ipimap->i_sb, "the iag is outside the map\n"); |
1da177e4 LT |
2741 | return -EIO; |
2742 | } | |
2743 | /* read the iag */ | |
82d5b9a7 | 2744 | IREAD_LOCK(ipimap, RDWRLOCK_IMAP); |
1da177e4 LT |
2745 | rc = diIAGRead(imap, iagno, &mp); |
2746 | IREAD_UNLOCK(ipimap); | |
2747 | if (rc) | |
2748 | return (rc); | |
7fab479b | 2749 | metapage_wait_for_io(mp); |
1da177e4 LT |
2750 | iagp = (struct iag *) mp->data; |
2751 | /* get the inode number and extent number of the inode within | |
2752 | * the iag and the inode number within the extent. | |
2753 | */ | |
2754 | ino = inum & (INOSPERIAG - 1); | |
2755 | extno = ino >> L2INOSPEREXT; | |
2756 | bitno = ino & (INOSPEREXT - 1); | |
2757 | mask = HIGHORDER >> bitno; | |
63f83c9f | 2758 | /* |
1da177e4 LT |
2759 | * mark the inode free in persistent map: |
2760 | */ | |
4d81715f | 2761 | if (is_free) { |
1da177e4 LT |
2762 | /* The inode should have been allocated both in working |
2763 | * map and in persistent map; | |
2764 | * the inode will be freed from working map at the release | |
2765 | * of last reference release; | |
2766 | */ | |
2767 | if (!(le32_to_cpu(iagp->wmap[extno]) & mask)) { | |
63f83c9f | 2768 | jfs_error(ipimap->i_sb, |
eb8630d7 JP |
2769 | "inode %ld not marked as allocated in wmap!\n", |
2770 | inum); | |
1da177e4 LT |
2771 | } |
2772 | if (!(le32_to_cpu(iagp->pmap[extno]) & mask)) { | |
2773 | jfs_error(ipimap->i_sb, | |
eb8630d7 JP |
2774 | "inode %ld not marked as allocated in pmap!\n", |
2775 | inum); | |
1da177e4 LT |
2776 | } |
2777 | /* update the bitmap for the extent of the freed inode */ | |
2778 | iagp->pmap[extno] &= cpu_to_le32(~mask); | |
2779 | } | |
2780 | /* | |
2781 | * mark the inode allocated in persistent map: | |
2782 | */ | |
2783 | else { | |
2784 | /* The inode should be already allocated in the working map | |
2785 | * and should be free in persistent map; | |
2786 | */ | |
2787 | if (!(le32_to_cpu(iagp->wmap[extno]) & mask)) { | |
2788 | release_metapage(mp); | |
2789 | jfs_error(ipimap->i_sb, | |
eb8630d7 | 2790 | "the inode is not allocated in the working map\n"); |
1da177e4 LT |
2791 | return -EIO; |
2792 | } | |
2793 | if ((le32_to_cpu(iagp->pmap[extno]) & mask) != 0) { | |
2794 | release_metapage(mp); | |
2795 | jfs_error(ipimap->i_sb, | |
eb8630d7 | 2796 | "the inode is not free in the persistent map\n"); |
1da177e4 LT |
2797 | return -EIO; |
2798 | } | |
2799 | /* update the bitmap for the extent of the allocated inode */ | |
2800 | iagp->pmap[extno] |= cpu_to_le32(mask); | |
2801 | } | |
2802 | /* | |
2803 | * update iag lsn | |
2804 | */ | |
2805 | lsn = tblk->lsn; | |
2806 | log = JFS_SBI(tblk->sb)->log; | |
be0bf7da | 2807 | LOGSYNC_LOCK(log, flags); |
1da177e4 LT |
2808 | if (mp->lsn != 0) { |
2809 | /* inherit older/smaller lsn */ | |
2810 | logdiff(difft, lsn, log); | |
2811 | logdiff(diffp, mp->lsn, log); | |
2812 | if (difft < diffp) { | |
2813 | mp->lsn = lsn; | |
2814 | /* move mp after tblock in logsync list */ | |
1da177e4 | 2815 | list_move(&mp->synclist, &tblk->synclist); |
1da177e4 LT |
2816 | } |
2817 | /* inherit younger/larger clsn */ | |
1da177e4 LT |
2818 | assert(mp->clsn); |
2819 | logdiff(difft, tblk->clsn, log); | |
2820 | logdiff(diffp, mp->clsn, log); | |
2821 | if (difft > diffp) | |
2822 | mp->clsn = tblk->clsn; | |
1da177e4 LT |
2823 | } else { |
2824 | mp->log = log; | |
2825 | mp->lsn = lsn; | |
2826 | /* insert mp after tblock in logsync list */ | |
1da177e4 LT |
2827 | log->count++; |
2828 | list_add(&mp->synclist, &tblk->synclist); | |
2829 | mp->clsn = tblk->clsn; | |
1da177e4 | 2830 | } |
be0bf7da | 2831 | LOGSYNC_UNLOCK(log, flags); |
1da177e4 LT |
2832 | write_metapage(mp); |
2833 | return (0); | |
2834 | } | |
2835 | ||
2836 | /* | |
2837 | * diExtendFS() | |
2838 | * | |
2839 | * function: update imap for extendfs(); | |
63f83c9f DK |
2840 | * |
2841 | * note: AG size has been increased s.t. each k old contiguous AGs are | |
1da177e4 LT |
2842 | * coalesced into a new AG; |
2843 | */ | |
2844 | int diExtendFS(struct inode *ipimap, struct inode *ipbmap) | |
2845 | { | |
2846 | int rc, rcx = 0; | |
2847 | struct inomap *imap = JFS_IP(ipimap)->i_imap; | |
2848 | struct iag *iagp = NULL, *hiagp = NULL; | |
2849 | struct bmap *mp = JFS_SBI(ipbmap->i_sb)->bmap; | |
2850 | struct metapage *bp, *hbp; | |
2851 | int i, n, head; | |
2852 | int numinos, xnuminos = 0, xnumfree = 0; | |
2853 | s64 agstart; | |
2854 | ||
2855 | jfs_info("diExtendFS: nextiag:%d numinos:%d numfree:%d", | |
2856 | imap->im_nextiag, atomic_read(&imap->im_numinos), | |
2857 | atomic_read(&imap->im_numfree)); | |
2858 | ||
2859 | /* | |
f720e3ba | 2860 | * reconstruct imap |
1da177e4 LT |
2861 | * |
2862 | * coalesce contiguous k (newAGSize/oldAGSize) AGs; | |
2863 | * i.e., (AGi, ..., AGj) where i = k*n and j = k*(n+1) - 1 to AGn; | |
2864 | * note: new AG size = old AG size * (2**x). | |
2865 | */ | |
2866 | ||
2867 | /* init per AG control information im_agctl[] */ | |
2868 | for (i = 0; i < MAXAG; i++) { | |
2869 | imap->im_agctl[i].inofree = -1; | |
2870 | imap->im_agctl[i].extfree = -1; | |
2871 | imap->im_agctl[i].numinos = 0; /* number of backed inodes */ | |
2872 | imap->im_agctl[i].numfree = 0; /* number of free backed inodes */ | |
2873 | } | |
2874 | ||
2875 | /* | |
f720e3ba | 2876 | * process each iag page of the map. |
1da177e4 LT |
2877 | * |
2878 | * rebuild AG Free Inode List, AG Free Inode Extent List; | |
2879 | */ | |
2880 | for (i = 0; i < imap->im_nextiag; i++) { | |
2881 | if ((rc = diIAGRead(imap, i, &bp))) { | |
2882 | rcx = rc; | |
2883 | continue; | |
2884 | } | |
2885 | iagp = (struct iag *) bp->data; | |
2886 | if (le32_to_cpu(iagp->iagnum) != i) { | |
2887 | release_metapage(bp); | |
eb8630d7 | 2888 | jfs_error(ipimap->i_sb, "unexpected value of iagnum\n"); |
1da177e4 LT |
2889 | return -EIO; |
2890 | } | |
2891 | ||
2892 | /* leave free iag in the free iag list */ | |
63f83c9f | 2893 | if (iagp->nfreeexts == cpu_to_le32(EXTSPERIAG)) { |
f720e3ba | 2894 | release_metapage(bp); |
1da177e4 LT |
2895 | continue; |
2896 | } | |
2897 | ||
1da177e4 | 2898 | agstart = le64_to_cpu(iagp->agstart); |
1da177e4 | 2899 | n = agstart >> mp->db_agl2size; |
28e0fa89 | 2900 | iagp->agstart = cpu_to_le64((s64)n << mp->db_agl2size); |
1da177e4 LT |
2901 | |
2902 | /* compute backed inodes */ | |
2903 | numinos = (EXTSPERIAG - le32_to_cpu(iagp->nfreeexts)) | |
2904 | << L2INOSPEREXT; | |
2905 | if (numinos > 0) { | |
2906 | /* merge AG backed inodes */ | |
2907 | imap->im_agctl[n].numinos += numinos; | |
2908 | xnuminos += numinos; | |
2909 | } | |
2910 | ||
2911 | /* if any backed free inodes, insert at AG free inode list */ | |
2912 | if ((int) le32_to_cpu(iagp->nfreeinos) > 0) { | |
2913 | if ((head = imap->im_agctl[n].inofree) == -1) { | |
2914 | iagp->inofreefwd = cpu_to_le32(-1); | |
2915 | iagp->inofreeback = cpu_to_le32(-1); | |
2916 | } else { | |
2917 | if ((rc = diIAGRead(imap, head, &hbp))) { | |
2918 | rcx = rc; | |
2919 | goto nextiag; | |
2920 | } | |
2921 | hiagp = (struct iag *) hbp->data; | |
2922 | hiagp->inofreeback = iagp->iagnum; | |
2923 | iagp->inofreefwd = cpu_to_le32(head); | |
2924 | iagp->inofreeback = cpu_to_le32(-1); | |
2925 | write_metapage(hbp); | |
2926 | } | |
2927 | ||
2928 | imap->im_agctl[n].inofree = | |
2929 | le32_to_cpu(iagp->iagnum); | |
2930 | ||
2931 | /* merge AG backed free inodes */ | |
2932 | imap->im_agctl[n].numfree += | |
2933 | le32_to_cpu(iagp->nfreeinos); | |
2934 | xnumfree += le32_to_cpu(iagp->nfreeinos); | |
2935 | } | |
2936 | ||
2937 | /* if any free extents, insert at AG free extent list */ | |
2938 | if (le32_to_cpu(iagp->nfreeexts) > 0) { | |
2939 | if ((head = imap->im_agctl[n].extfree) == -1) { | |
2940 | iagp->extfreefwd = cpu_to_le32(-1); | |
2941 | iagp->extfreeback = cpu_to_le32(-1); | |
2942 | } else { | |
2943 | if ((rc = diIAGRead(imap, head, &hbp))) { | |
2944 | rcx = rc; | |
2945 | goto nextiag; | |
2946 | } | |
2947 | hiagp = (struct iag *) hbp->data; | |
2948 | hiagp->extfreeback = iagp->iagnum; | |
2949 | iagp->extfreefwd = cpu_to_le32(head); | |
2950 | iagp->extfreeback = cpu_to_le32(-1); | |
2951 | write_metapage(hbp); | |
2952 | } | |
2953 | ||
2954 | imap->im_agctl[n].extfree = | |
2955 | le32_to_cpu(iagp->iagnum); | |
2956 | } | |
2957 | ||
2958 | nextiag: | |
2959 | write_metapage(bp); | |
2960 | } | |
2961 | ||
2962 | if (xnuminos != atomic_read(&imap->im_numinos) || | |
2963 | xnumfree != atomic_read(&imap->im_numfree)) { | |
eb8630d7 | 2964 | jfs_error(ipimap->i_sb, "numinos or numfree incorrect\n"); |
1da177e4 LT |
2965 | return -EIO; |
2966 | } | |
2967 | ||
2968 | return rcx; | |
2969 | } | |
2970 | ||
2971 | ||
2972 | /* | |
2973 | * duplicateIXtree() | |
2974 | * | |
2975 | * serialization: IWRITE_LOCK held on entry/exit | |
2976 | * | |
2977 | * note: shadow page with regular inode (rel.2); | |
2978 | */ | |
2979 | static void duplicateIXtree(struct super_block *sb, s64 blkno, | |
2980 | int xlen, s64 *xaddr) | |
2981 | { | |
2982 | struct jfs_superblock *j_sb; | |
2983 | struct buffer_head *bh; | |
2984 | struct inode *ip; | |
2985 | tid_t tid; | |
2986 | ||
2987 | /* if AIT2 ipmap2 is bad, do not try to update it */ | |
2988 | if (JFS_SBI(sb)->mntflag & JFS_BAD_SAIT) /* s_flag */ | |
2989 | return; | |
2990 | ip = diReadSpecial(sb, FILESYSTEM_I, 1); | |
2991 | if (ip == NULL) { | |
2992 | JFS_SBI(sb)->mntflag |= JFS_BAD_SAIT; | |
2993 | if (readSuper(sb, &bh)) | |
2994 | return; | |
2995 | j_sb = (struct jfs_superblock *)bh->b_data; | |
2996 | j_sb->s_flag |= cpu_to_le32(JFS_BAD_SAIT); | |
2997 | ||
2998 | mark_buffer_dirty(bh); | |
2999 | sync_dirty_buffer(bh); | |
3000 | brelse(bh); | |
3001 | return; | |
3002 | } | |
3003 | ||
3004 | /* start transaction */ | |
3005 | tid = txBegin(sb, COMMIT_FORCE); | |
3006 | /* update the inode map addressing structure to point to it */ | |
3007 | if (xtInsert(tid, ip, 0, blkno, xlen, xaddr, 0)) { | |
3008 | JFS_SBI(sb)->mntflag |= JFS_BAD_SAIT; | |
3009 | txAbort(tid, 1); | |
3010 | goto cleanup; | |
3011 | ||
3012 | } | |
3013 | /* update the inode map's inode to reflect the extension */ | |
3014 | ip->i_size += PSIZE; | |
3015 | inode_add_bytes(ip, PSIZE); | |
3016 | txCommit(tid, 1, &ip, COMMIT_FORCE); | |
3017 | cleanup: | |
3018 | txEnd(tid); | |
3019 | diFreeSpecial(ip); | |
3020 | } | |
3021 | ||
3022 | /* | |
f720e3ba | 3023 | * NAME: copy_from_dinode() |
1da177e4 | 3024 | * |
f720e3ba | 3025 | * FUNCTION: Copies inode info from disk inode to in-memory inode |
1da177e4 LT |
3026 | * |
3027 | * RETURN VALUES: | |
f720e3ba DK |
3028 | * 0 - success |
3029 | * -ENOMEM - insufficient memory | |
1da177e4 LT |
3030 | */ |
3031 | static int copy_from_dinode(struct dinode * dip, struct inode *ip) | |
3032 | { | |
3033 | struct jfs_inode_info *jfs_ip = JFS_IP(ip); | |
69eb66d7 | 3034 | struct jfs_sb_info *sbi = JFS_SBI(ip->i_sb); |
1da177e4 LT |
3035 | |
3036 | jfs_ip->fileset = le32_to_cpu(dip->di_fileset); | |
3037 | jfs_ip->mode2 = le32_to_cpu(dip->di_mode); | |
3e2221c7 | 3038 | jfs_set_inode_flags(ip); |
1da177e4 LT |
3039 | |
3040 | ip->i_mode = le32_to_cpu(dip->di_mode) & 0xffff; | |
69eb66d7 DK |
3041 | if (sbi->umask != -1) { |
3042 | ip->i_mode = (ip->i_mode & ~0777) | (0777 & ~sbi->umask); | |
3043 | /* For directories, add x permission if r is allowed by umask */ | |
3044 | if (S_ISDIR(ip->i_mode)) { | |
3045 | if (ip->i_mode & 0400) | |
3046 | ip->i_mode |= 0100; | |
3047 | if (ip->i_mode & 0040) | |
3048 | ip->i_mode |= 0010; | |
3049 | if (ip->i_mode & 0004) | |
3050 | ip->i_mode |= 0001; | |
3051 | } | |
3052 | } | |
bfe86848 | 3053 | set_nlink(ip, le32_to_cpu(dip->di_nlink)); |
69eb66d7 | 3054 | |
c18cdc1a EB |
3055 | jfs_ip->saved_uid = make_kuid(&init_user_ns, le32_to_cpu(dip->di_uid)); |
3056 | if (!uid_valid(sbi->uid)) | |
69eb66d7 DK |
3057 | ip->i_uid = jfs_ip->saved_uid; |
3058 | else { | |
3059 | ip->i_uid = sbi->uid; | |
3060 | } | |
3061 | ||
c18cdc1a EB |
3062 | jfs_ip->saved_gid = make_kgid(&init_user_ns, le32_to_cpu(dip->di_gid)); |
3063 | if (!gid_valid(sbi->gid)) | |
69eb66d7 DK |
3064 | ip->i_gid = jfs_ip->saved_gid; |
3065 | else { | |
3066 | ip->i_gid = sbi->gid; | |
3067 | } | |
3068 | ||
1da177e4 | 3069 | ip->i_size = le64_to_cpu(dip->di_size); |
dc34d133 JL |
3070 | inode_set_atime(ip, le32_to_cpu(dip->di_atime.tv_sec), |
3071 | le32_to_cpu(dip->di_atime.tv_nsec)); | |
3072 | inode_set_mtime(ip, le32_to_cpu(dip->di_mtime.tv_sec), | |
3073 | le32_to_cpu(dip->di_mtime.tv_nsec)); | |
ad9dc5df JL |
3074 | inode_set_ctime(ip, le32_to_cpu(dip->di_ctime.tv_sec), |
3075 | le32_to_cpu(dip->di_ctime.tv_nsec)); | |
1da177e4 LT |
3076 | ip->i_blocks = LBLK2PBLK(ip->i_sb, le64_to_cpu(dip->di_nblocks)); |
3077 | ip->i_generation = le32_to_cpu(dip->di_gen); | |
3078 | ||
3079 | jfs_ip->ixpxd = dip->di_ixpxd; /* in-memory pxd's are little-endian */ | |
3080 | jfs_ip->acl = dip->di_acl; /* as are dxd's */ | |
3081 | jfs_ip->ea = dip->di_ea; | |
3082 | jfs_ip->next_index = le32_to_cpu(dip->di_next_index); | |
3083 | jfs_ip->otime = le32_to_cpu(dip->di_otime.tv_sec); | |
3084 | jfs_ip->acltype = le32_to_cpu(dip->di_acltype); | |
3085 | ||
3086 | if (S_ISCHR(ip->i_mode) || S_ISBLK(ip->i_mode)) { | |
3087 | jfs_ip->dev = le32_to_cpu(dip->di_rdev); | |
3088 | ip->i_rdev = new_decode_dev(jfs_ip->dev); | |
3089 | } | |
3090 | ||
3091 | if (S_ISDIR(ip->i_mode)) { | |
5d299f44 | 3092 | memcpy(&jfs_ip->u.dir, &dip->u._dir, 384); |
1da177e4 LT |
3093 | } else if (S_ISREG(ip->i_mode) || S_ISLNK(ip->i_mode)) { |
3094 | memcpy(&jfs_ip->i_xtroot, &dip->di_xtroot, 288); | |
3095 | } else | |
3096 | memcpy(&jfs_ip->i_inline_ea, &dip->di_inlineea, 128); | |
3097 | ||
3098 | /* Zero the in-memory-only stuff */ | |
3099 | jfs_ip->cflag = 0; | |
3100 | jfs_ip->btindex = 0; | |
3101 | jfs_ip->btorder = 0; | |
3102 | jfs_ip->bxflag = 0; | |
3103 | jfs_ip->blid = 0; | |
3104 | jfs_ip->atlhead = 0; | |
3105 | jfs_ip->atltail = 0; | |
3106 | jfs_ip->xtlid = 0; | |
3107 | return (0); | |
3108 | } | |
3109 | ||
3110 | /* | |
f720e3ba | 3111 | * NAME: copy_to_dinode() |
1da177e4 | 3112 | * |
f720e3ba | 3113 | * FUNCTION: Copies inode info from in-memory inode to disk inode |
1da177e4 LT |
3114 | */ |
3115 | static void copy_to_dinode(struct dinode * dip, struct inode *ip) | |
3116 | { | |
3117 | struct jfs_inode_info *jfs_ip = JFS_IP(ip); | |
69eb66d7 | 3118 | struct jfs_sb_info *sbi = JFS_SBI(ip->i_sb); |
1da177e4 LT |
3119 | |
3120 | dip->di_fileset = cpu_to_le32(jfs_ip->fileset); | |
69eb66d7 | 3121 | dip->di_inostamp = cpu_to_le32(sbi->inostamp); |
1da177e4 LT |
3122 | dip->di_number = cpu_to_le32(ip->i_ino); |
3123 | dip->di_gen = cpu_to_le32(ip->i_generation); | |
3124 | dip->di_size = cpu_to_le64(ip->i_size); | |
3125 | dip->di_nblocks = cpu_to_le64(PBLK2LBLK(ip->i_sb, ip->i_blocks)); | |
3126 | dip->di_nlink = cpu_to_le32(ip->i_nlink); | |
c18cdc1a EB |
3127 | if (!uid_valid(sbi->uid)) |
3128 | dip->di_uid = cpu_to_le32(i_uid_read(ip)); | |
69eb66d7 | 3129 | else |
c18cdc1a EB |
3130 | dip->di_uid =cpu_to_le32(from_kuid(&init_user_ns, |
3131 | jfs_ip->saved_uid)); | |
3132 | if (!gid_valid(sbi->gid)) | |
3133 | dip->di_gid = cpu_to_le32(i_gid_read(ip)); | |
69eb66d7 | 3134 | else |
c18cdc1a EB |
3135 | dip->di_gid = cpu_to_le32(from_kgid(&init_user_ns, |
3136 | jfs_ip->saved_gid)); | |
1da177e4 LT |
3137 | /* |
3138 | * mode2 is only needed for storing the higher order bits. | |
3139 | * Trust i_mode for the lower order ones | |
3140 | */ | |
69eb66d7 DK |
3141 | if (sbi->umask == -1) |
3142 | dip->di_mode = cpu_to_le32((jfs_ip->mode2 & 0xffff0000) | | |
3143 | ip->i_mode); | |
3144 | else /* Leave the original permissions alone */ | |
3145 | dip->di_mode = cpu_to_le32(jfs_ip->mode2); | |
3146 | ||
dc34d133 JL |
3147 | dip->di_atime.tv_sec = cpu_to_le32(inode_get_atime_sec(ip)); |
3148 | dip->di_atime.tv_nsec = cpu_to_le32(inode_get_atime_nsec(ip)); | |
3149 | dip->di_ctime.tv_sec = cpu_to_le32(inode_get_ctime_sec(ip)); | |
3150 | dip->di_ctime.tv_nsec = cpu_to_le32(inode_get_ctime_nsec(ip)); | |
3151 | dip->di_mtime.tv_sec = cpu_to_le32(inode_get_mtime_sec(ip)); | |
3152 | dip->di_mtime.tv_nsec = cpu_to_le32(inode_get_mtime_nsec(ip)); | |
1da177e4 LT |
3153 | dip->di_ixpxd = jfs_ip->ixpxd; /* in-memory pxd's are little-endian */ |
3154 | dip->di_acl = jfs_ip->acl; /* as are dxd's */ | |
3155 | dip->di_ea = jfs_ip->ea; | |
3156 | dip->di_next_index = cpu_to_le32(jfs_ip->next_index); | |
3157 | dip->di_otime.tv_sec = cpu_to_le32(jfs_ip->otime); | |
3158 | dip->di_otime.tv_nsec = 0; | |
3159 | dip->di_acltype = cpu_to_le32(jfs_ip->acltype); | |
3160 | if (S_ISCHR(ip->i_mode) || S_ISBLK(ip->i_mode)) | |
3161 | dip->di_rdev = cpu_to_le32(jfs_ip->dev); | |
3162 | } |