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