Commit | Line | Data |
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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
fe6c991c | 3 | * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
4 | * |
5 | * This copyrighted material is made available to anyone wishing to use, | |
6 | * modify, copy, or redistribute it subject to the terms and conditions | |
e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
b3b94faa DT |
8 | */ |
9 | ||
b3b94faa DT |
10 | #include <linux/slab.h> |
11 | #include <linux/spinlock.h> | |
12 | #include <linux/completion.h> | |
13 | #include <linux/buffer_head.h> | |
f42faf4f | 14 | #include <linux/fs.h> |
5c676f6d | 15 | #include <linux/gfs2_ondisk.h> |
7d308590 | 16 | #include <linux/lm_interface.h> |
1f466a47 | 17 | #include <linux/prefetch.h> |
b3b94faa DT |
18 | |
19 | #include "gfs2.h" | |
5c676f6d | 20 | #include "incore.h" |
b3b94faa DT |
21 | #include "glock.h" |
22 | #include "glops.h" | |
b3b94faa DT |
23 | #include "lops.h" |
24 | #include "meta_io.h" | |
25 | #include "quota.h" | |
26 | #include "rgrp.h" | |
27 | #include "super.h" | |
28 | #include "trans.h" | |
5c676f6d | 29 | #include "util.h" |
172e045a | 30 | #include "log.h" |
c8cdf479 | 31 | #include "inode.h" |
51ff87bd | 32 | #include "ops_address.h" |
b3b94faa | 33 | |
2c1e52aa | 34 | #define BFITNOENT ((u32)~0) |
6760bdcd | 35 | #define NO_BLOCK ((u64)~0) |
88c8ab1f | 36 | |
1f466a47 BP |
37 | #if BITS_PER_LONG == 32 |
38 | #define LBITMASK (0x55555555UL) | |
39 | #define LBITSKIP55 (0x55555555UL) | |
40 | #define LBITSKIP00 (0x00000000UL) | |
41 | #else | |
42 | #define LBITMASK (0x5555555555555555UL) | |
43 | #define LBITSKIP55 (0x5555555555555555UL) | |
44 | #define LBITSKIP00 (0x0000000000000000UL) | |
45 | #endif | |
46 | ||
88c8ab1f SW |
47 | /* |
48 | * These routines are used by the resource group routines (rgrp.c) | |
49 | * to keep track of block allocation. Each block is represented by two | |
feaa7bba SW |
50 | * bits. So, each byte represents GFS2_NBBY (i.e. 4) blocks. |
51 | * | |
52 | * 0 = Free | |
53 | * 1 = Used (not metadata) | |
54 | * 2 = Unlinked (still in use) inode | |
55 | * 3 = Used (metadata) | |
88c8ab1f SW |
56 | */ |
57 | ||
58 | static const char valid_change[16] = { | |
59 | /* current */ | |
feaa7bba | 60 | /* n */ 0, 1, 1, 1, |
88c8ab1f | 61 | /* e */ 1, 0, 0, 0, |
feaa7bba | 62 | /* w */ 0, 0, 0, 1, |
88c8ab1f SW |
63 | 1, 0, 0, 0 |
64 | }; | |
65 | ||
c8cdf479 | 66 | static u32 rgblk_search(struct gfs2_rgrpd *rgd, u32 goal, |
b45e41d7 SW |
67 | unsigned char old_state, unsigned char new_state, |
68 | unsigned int *n); | |
c8cdf479 | 69 | |
88c8ab1f SW |
70 | /** |
71 | * gfs2_setbit - Set a bit in the bitmaps | |
72 | * @buffer: the buffer that holds the bitmaps | |
73 | * @buflen: the length (in bytes) of the buffer | |
74 | * @block: the block to set | |
75 | * @new_state: the new state of the block | |
76 | * | |
77 | */ | |
78 | ||
b45e41d7 SW |
79 | static inline void gfs2_setbit(struct gfs2_rgrpd *rgd, unsigned char *buf1, |
80 | unsigned char *buf2, unsigned int offset, | |
81 | unsigned int buflen, u32 block, | |
82 | unsigned char new_state) | |
88c8ab1f | 83 | { |
b45e41d7 SW |
84 | unsigned char *byte1, *byte2, *end, cur_state; |
85 | const unsigned int bit = (block % GFS2_NBBY) * GFS2_BIT_SIZE; | |
88c8ab1f | 86 | |
b45e41d7 SW |
87 | byte1 = buf1 + offset + (block / GFS2_NBBY); |
88 | end = buf1 + offset + buflen; | |
88c8ab1f | 89 | |
b45e41d7 | 90 | BUG_ON(byte1 >= end); |
88c8ab1f | 91 | |
b45e41d7 | 92 | cur_state = (*byte1 >> bit) & GFS2_BIT_MASK; |
88c8ab1f | 93 | |
b45e41d7 | 94 | if (unlikely(!valid_change[new_state * 4 + cur_state])) { |
88c8ab1f | 95 | gfs2_consist_rgrpd(rgd); |
b45e41d7 SW |
96 | return; |
97 | } | |
98 | *byte1 ^= (cur_state ^ new_state) << bit; | |
99 | ||
100 | if (buf2) { | |
101 | byte2 = buf2 + offset + (block / GFS2_NBBY); | |
102 | cur_state = (*byte2 >> bit) & GFS2_BIT_MASK; | |
103 | *byte2 ^= (cur_state ^ new_state) << bit; | |
104 | } | |
88c8ab1f SW |
105 | } |
106 | ||
107 | /** | |
108 | * gfs2_testbit - test a bit in the bitmaps | |
109 | * @buffer: the buffer that holds the bitmaps | |
110 | * @buflen: the length (in bytes) of the buffer | |
111 | * @block: the block to read | |
112 | * | |
113 | */ | |
114 | ||
b45e41d7 SW |
115 | static inline unsigned char gfs2_testbit(struct gfs2_rgrpd *rgd, |
116 | const unsigned char *buffer, | |
117 | unsigned int buflen, u32 block) | |
88c8ab1f | 118 | { |
b45e41d7 SW |
119 | const unsigned char *byte, *end; |
120 | unsigned char cur_state; | |
88c8ab1f SW |
121 | unsigned int bit; |
122 | ||
123 | byte = buffer + (block / GFS2_NBBY); | |
124 | bit = (block % GFS2_NBBY) * GFS2_BIT_SIZE; | |
125 | end = buffer + buflen; | |
126 | ||
127 | gfs2_assert(rgd->rd_sbd, byte < end); | |
128 | ||
129 | cur_state = (*byte >> bit) & GFS2_BIT_MASK; | |
130 | ||
131 | return cur_state; | |
132 | } | |
133 | ||
134 | /** | |
135 | * gfs2_bitfit - Search an rgrp's bitmap buffer to find a bit-pair representing | |
136 | * a block in a given allocation state. | |
137 | * @buffer: the buffer that holds the bitmaps | |
138 | * @buflen: the length (in bytes) of the buffer | |
139 | * @goal: start search at this block's bit-pair (within @buffer) | |
6760bdcd | 140 | * @old_state: GFS2_BLKST_XXX the state of the block we're looking for. |
88c8ab1f SW |
141 | * |
142 | * Scope of @goal and returned block number is only within this bitmap buffer, | |
143 | * not entire rgrp or filesystem. @buffer will be offset from the actual | |
144 | * beginning of a bitmap block buffer, skipping any header structures. | |
145 | * | |
146 | * Return: the block number (bitmap buffer scope) that was found | |
147 | */ | |
148 | ||
110acf38 SW |
149 | static u32 gfs2_bitfit(const u8 *buffer, unsigned int buflen, u32 goal, |
150 | u8 old_state) | |
88c8ab1f | 151 | { |
1f466a47 BP |
152 | const u8 *byte, *start, *end; |
153 | int bit, startbit; | |
154 | u32 g1, g2, misaligned; | |
155 | unsigned long *plong; | |
156 | unsigned long lskipval; | |
157 | ||
158 | lskipval = (old_state & GFS2_BLKST_USED) ? LBITSKIP00 : LBITSKIP55; | |
159 | g1 = (goal / GFS2_NBBY); | |
160 | start = buffer + g1; | |
161 | byte = start; | |
162 | end = buffer + buflen; | |
163 | g2 = ALIGN(g1, sizeof(unsigned long)); | |
164 | plong = (unsigned long *)(buffer + g2); | |
165 | startbit = bit = (goal % GFS2_NBBY) * GFS2_BIT_SIZE; | |
166 | misaligned = g2 - g1; | |
167 | if (!misaligned) | |
168 | goto ulong_aligned; | |
169 | /* parse the bitmap a byte at a time */ | |
170 | misaligned: | |
171 | while (byte < end) { | |
172 | if (((*byte >> bit) & GFS2_BIT_MASK) == old_state) { | |
173 | return goal + | |
174 | (((byte - start) * GFS2_NBBY) + | |
175 | ((bit - startbit) >> 1)); | |
88c8ab1f | 176 | } |
88c8ab1f | 177 | bit += GFS2_BIT_SIZE; |
1f466a47 | 178 | if (bit >= GFS2_NBBY * GFS2_BIT_SIZE) { |
88c8ab1f SW |
179 | bit = 0; |
180 | byte++; | |
1f466a47 BP |
181 | misaligned--; |
182 | if (!misaligned) { | |
183 | plong = (unsigned long *)byte; | |
184 | goto ulong_aligned; | |
185 | } | |
88c8ab1f | 186 | } |
88c8ab1f | 187 | } |
1f466a47 | 188 | return BFITNOENT; |
88c8ab1f | 189 | |
1f466a47 BP |
190 | /* parse the bitmap a unsigned long at a time */ |
191 | ulong_aligned: | |
192 | /* Stop at "end - 1" or else prefetch can go past the end and segfault. | |
193 | We could "if" it but we'd lose some of the performance gained. | |
194 | This way will only slow down searching the very last 4/8 bytes | |
195 | depending on architecture. I've experimented with several ways | |
196 | of writing this section such as using an else before the goto | |
197 | but this one seems to be the fastest. */ | |
17c15da0 | 198 | while ((unsigned char *)plong < end - sizeof(unsigned long)) { |
1f466a47 BP |
199 | prefetch(plong + 1); |
200 | if (((*plong) & LBITMASK) != lskipval) | |
201 | break; | |
202 | plong++; | |
203 | } | |
204 | if ((unsigned char *)plong < end) { | |
205 | byte = (const u8 *)plong; | |
206 | misaligned += sizeof(unsigned long) - 1; | |
207 | goto misaligned; | |
208 | } | |
88c8ab1f SW |
209 | return BFITNOENT; |
210 | } | |
211 | ||
212 | /** | |
213 | * gfs2_bitcount - count the number of bits in a certain state | |
214 | * @buffer: the buffer that holds the bitmaps | |
215 | * @buflen: the length (in bytes) of the buffer | |
216 | * @state: the state of the block we're looking for | |
217 | * | |
218 | * Returns: The number of bits | |
219 | */ | |
220 | ||
110acf38 SW |
221 | static u32 gfs2_bitcount(struct gfs2_rgrpd *rgd, const u8 *buffer, |
222 | unsigned int buflen, u8 state) | |
88c8ab1f | 223 | { |
110acf38 SW |
224 | const u8 *byte = buffer; |
225 | const u8 *end = buffer + buflen; | |
226 | const u8 state1 = state << 2; | |
227 | const u8 state2 = state << 4; | |
228 | const u8 state3 = state << 6; | |
cd915493 | 229 | u32 count = 0; |
88c8ab1f SW |
230 | |
231 | for (; byte < end; byte++) { | |
232 | if (((*byte) & 0x03) == state) | |
233 | count++; | |
234 | if (((*byte) & 0x0C) == state1) | |
235 | count++; | |
236 | if (((*byte) & 0x30) == state2) | |
237 | count++; | |
238 | if (((*byte) & 0xC0) == state3) | |
239 | count++; | |
240 | } | |
241 | ||
242 | return count; | |
243 | } | |
244 | ||
b3b94faa DT |
245 | /** |
246 | * gfs2_rgrp_verify - Verify that a resource group is consistent | |
247 | * @sdp: the filesystem | |
248 | * @rgd: the rgrp | |
249 | * | |
250 | */ | |
251 | ||
252 | void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd) | |
253 | { | |
254 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
255 | struct gfs2_bitmap *bi = NULL; | |
bb8d8a6f | 256 | u32 length = rgd->rd_length; |
cd915493 | 257 | u32 count[4], tmp; |
b3b94faa DT |
258 | int buf, x; |
259 | ||
cd915493 | 260 | memset(count, 0, 4 * sizeof(u32)); |
b3b94faa DT |
261 | |
262 | /* Count # blocks in each of 4 possible allocation states */ | |
263 | for (buf = 0; buf < length; buf++) { | |
264 | bi = rgd->rd_bits + buf; | |
265 | for (x = 0; x < 4; x++) | |
266 | count[x] += gfs2_bitcount(rgd, | |
267 | bi->bi_bh->b_data + | |
268 | bi->bi_offset, | |
269 | bi->bi_len, x); | |
270 | } | |
271 | ||
272 | if (count[0] != rgd->rd_rg.rg_free) { | |
273 | if (gfs2_consist_rgrpd(rgd)) | |
274 | fs_err(sdp, "free data mismatch: %u != %u\n", | |
275 | count[0], rgd->rd_rg.rg_free); | |
276 | return; | |
277 | } | |
278 | ||
bb8d8a6f | 279 | tmp = rgd->rd_data - |
b3b94faa DT |
280 | rgd->rd_rg.rg_free - |
281 | rgd->rd_rg.rg_dinodes; | |
feaa7bba | 282 | if (count[1] + count[2] != tmp) { |
b3b94faa DT |
283 | if (gfs2_consist_rgrpd(rgd)) |
284 | fs_err(sdp, "used data mismatch: %u != %u\n", | |
285 | count[1], tmp); | |
286 | return; | |
287 | } | |
288 | ||
feaa7bba | 289 | if (count[3] != rgd->rd_rg.rg_dinodes) { |
b3b94faa | 290 | if (gfs2_consist_rgrpd(rgd)) |
feaa7bba SW |
291 | fs_err(sdp, "used metadata mismatch: %u != %u\n", |
292 | count[3], rgd->rd_rg.rg_dinodes); | |
b3b94faa DT |
293 | return; |
294 | } | |
295 | ||
feaa7bba | 296 | if (count[2] > count[3]) { |
b3b94faa | 297 | if (gfs2_consist_rgrpd(rgd)) |
feaa7bba SW |
298 | fs_err(sdp, "unlinked inodes > inodes: %u\n", |
299 | count[2]); | |
b3b94faa DT |
300 | return; |
301 | } | |
feaa7bba | 302 | |
b3b94faa DT |
303 | } |
304 | ||
bb8d8a6f | 305 | static inline int rgrp_contains_block(struct gfs2_rgrpd *rgd, u64 block) |
b3b94faa | 306 | { |
bb8d8a6f SW |
307 | u64 first = rgd->rd_data0; |
308 | u64 last = first + rgd->rd_data; | |
16910427 | 309 | return first <= block && block < last; |
b3b94faa DT |
310 | } |
311 | ||
312 | /** | |
313 | * gfs2_blk2rgrpd - Find resource group for a given data/meta block number | |
314 | * @sdp: The GFS2 superblock | |
315 | * @n: The data block number | |
316 | * | |
317 | * Returns: The resource group, or NULL if not found | |
318 | */ | |
319 | ||
cd915493 | 320 | struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk) |
b3b94faa DT |
321 | { |
322 | struct gfs2_rgrpd *rgd; | |
323 | ||
324 | spin_lock(&sdp->sd_rindex_spin); | |
325 | ||
326 | list_for_each_entry(rgd, &sdp->sd_rindex_mru_list, rd_list_mru) { | |
bb8d8a6f | 327 | if (rgrp_contains_block(rgd, blk)) { |
b3b94faa DT |
328 | list_move(&rgd->rd_list_mru, &sdp->sd_rindex_mru_list); |
329 | spin_unlock(&sdp->sd_rindex_spin); | |
330 | return rgd; | |
331 | } | |
332 | } | |
333 | ||
334 | spin_unlock(&sdp->sd_rindex_spin); | |
335 | ||
336 | return NULL; | |
337 | } | |
338 | ||
339 | /** | |
340 | * gfs2_rgrpd_get_first - get the first Resource Group in the filesystem | |
341 | * @sdp: The GFS2 superblock | |
342 | * | |
343 | * Returns: The first rgrp in the filesystem | |
344 | */ | |
345 | ||
346 | struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp) | |
347 | { | |
348 | gfs2_assert(sdp, !list_empty(&sdp->sd_rindex_list)); | |
349 | return list_entry(sdp->sd_rindex_list.next, struct gfs2_rgrpd, rd_list); | |
350 | } | |
351 | ||
352 | /** | |
353 | * gfs2_rgrpd_get_next - get the next RG | |
354 | * @rgd: A RG | |
355 | * | |
356 | * Returns: The next rgrp | |
357 | */ | |
358 | ||
359 | struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd) | |
360 | { | |
361 | if (rgd->rd_list.next == &rgd->rd_sbd->sd_rindex_list) | |
362 | return NULL; | |
363 | return list_entry(rgd->rd_list.next, struct gfs2_rgrpd, rd_list); | |
364 | } | |
365 | ||
366 | static void clear_rgrpdi(struct gfs2_sbd *sdp) | |
367 | { | |
368 | struct list_head *head; | |
369 | struct gfs2_rgrpd *rgd; | |
370 | struct gfs2_glock *gl; | |
371 | ||
372 | spin_lock(&sdp->sd_rindex_spin); | |
373 | sdp->sd_rindex_forward = NULL; | |
374 | head = &sdp->sd_rindex_recent_list; | |
375 | while (!list_empty(head)) { | |
376 | rgd = list_entry(head->next, struct gfs2_rgrpd, rd_recent); | |
377 | list_del(&rgd->rd_recent); | |
378 | } | |
379 | spin_unlock(&sdp->sd_rindex_spin); | |
380 | ||
381 | head = &sdp->sd_rindex_list; | |
382 | while (!list_empty(head)) { | |
383 | rgd = list_entry(head->next, struct gfs2_rgrpd, rd_list); | |
384 | gl = rgd->rd_gl; | |
385 | ||
386 | list_del(&rgd->rd_list); | |
387 | list_del(&rgd->rd_list_mru); | |
388 | ||
389 | if (gl) { | |
5c676f6d | 390 | gl->gl_object = NULL; |
b3b94faa DT |
391 | gfs2_glock_put(gl); |
392 | } | |
393 | ||
394 | kfree(rgd->rd_bits); | |
6bdd9be6 | 395 | kmem_cache_free(gfs2_rgrpd_cachep, rgd); |
b3b94faa DT |
396 | } |
397 | } | |
398 | ||
399 | void gfs2_clear_rgrpd(struct gfs2_sbd *sdp) | |
400 | { | |
f55ab26a | 401 | mutex_lock(&sdp->sd_rindex_mutex); |
b3b94faa | 402 | clear_rgrpdi(sdp); |
f55ab26a | 403 | mutex_unlock(&sdp->sd_rindex_mutex); |
b3b94faa DT |
404 | } |
405 | ||
bb8d8a6f SW |
406 | static void gfs2_rindex_print(const struct gfs2_rgrpd *rgd) |
407 | { | |
408 | printk(KERN_INFO " ri_addr = %llu\n", (unsigned long long)rgd->rd_addr); | |
409 | printk(KERN_INFO " ri_length = %u\n", rgd->rd_length); | |
410 | printk(KERN_INFO " ri_data0 = %llu\n", (unsigned long long)rgd->rd_data0); | |
411 | printk(KERN_INFO " ri_data = %u\n", rgd->rd_data); | |
412 | printk(KERN_INFO " ri_bitbytes = %u\n", rgd->rd_bitbytes); | |
413 | } | |
414 | ||
b3b94faa DT |
415 | /** |
416 | * gfs2_compute_bitstructs - Compute the bitmap sizes | |
417 | * @rgd: The resource group descriptor | |
418 | * | |
419 | * Calculates bitmap descriptors, one for each block that contains bitmap data | |
420 | * | |
421 | * Returns: errno | |
422 | */ | |
423 | ||
424 | static int compute_bitstructs(struct gfs2_rgrpd *rgd) | |
425 | { | |
426 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
427 | struct gfs2_bitmap *bi; | |
bb8d8a6f | 428 | u32 length = rgd->rd_length; /* # blocks in hdr & bitmap */ |
cd915493 | 429 | u32 bytes_left, bytes; |
b3b94faa DT |
430 | int x; |
431 | ||
feaa7bba SW |
432 | if (!length) |
433 | return -EINVAL; | |
434 | ||
dd894be8 | 435 | rgd->rd_bits = kcalloc(length, sizeof(struct gfs2_bitmap), GFP_NOFS); |
b3b94faa DT |
436 | if (!rgd->rd_bits) |
437 | return -ENOMEM; | |
438 | ||
bb8d8a6f | 439 | bytes_left = rgd->rd_bitbytes; |
b3b94faa DT |
440 | |
441 | for (x = 0; x < length; x++) { | |
442 | bi = rgd->rd_bits + x; | |
443 | ||
444 | /* small rgrp; bitmap stored completely in header block */ | |
445 | if (length == 1) { | |
446 | bytes = bytes_left; | |
447 | bi->bi_offset = sizeof(struct gfs2_rgrp); | |
448 | bi->bi_start = 0; | |
449 | bi->bi_len = bytes; | |
450 | /* header block */ | |
451 | } else if (x == 0) { | |
452 | bytes = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_rgrp); | |
453 | bi->bi_offset = sizeof(struct gfs2_rgrp); | |
454 | bi->bi_start = 0; | |
455 | bi->bi_len = bytes; | |
456 | /* last block */ | |
457 | } else if (x + 1 == length) { | |
458 | bytes = bytes_left; | |
459 | bi->bi_offset = sizeof(struct gfs2_meta_header); | |
bb8d8a6f | 460 | bi->bi_start = rgd->rd_bitbytes - bytes_left; |
b3b94faa DT |
461 | bi->bi_len = bytes; |
462 | /* other blocks */ | |
463 | } else { | |
568f4c96 SW |
464 | bytes = sdp->sd_sb.sb_bsize - |
465 | sizeof(struct gfs2_meta_header); | |
b3b94faa | 466 | bi->bi_offset = sizeof(struct gfs2_meta_header); |
bb8d8a6f | 467 | bi->bi_start = rgd->rd_bitbytes - bytes_left; |
b3b94faa DT |
468 | bi->bi_len = bytes; |
469 | } | |
470 | ||
471 | bytes_left -= bytes; | |
472 | } | |
473 | ||
474 | if (bytes_left) { | |
475 | gfs2_consist_rgrpd(rgd); | |
476 | return -EIO; | |
477 | } | |
478 | bi = rgd->rd_bits + (length - 1); | |
bb8d8a6f | 479 | if ((bi->bi_start + bi->bi_len) * GFS2_NBBY != rgd->rd_data) { |
b3b94faa | 480 | if (gfs2_consist_rgrpd(rgd)) { |
bb8d8a6f | 481 | gfs2_rindex_print(rgd); |
b3b94faa DT |
482 | fs_err(sdp, "start=%u len=%u offset=%u\n", |
483 | bi->bi_start, bi->bi_len, bi->bi_offset); | |
484 | } | |
485 | return -EIO; | |
486 | } | |
487 | ||
488 | return 0; | |
489 | } | |
490 | ||
7ae8fa84 RP |
491 | /** |
492 | * gfs2_ri_total - Total up the file system space, according to the rindex. | |
493 | * | |
494 | */ | |
495 | u64 gfs2_ri_total(struct gfs2_sbd *sdp) | |
496 | { | |
497 | u64 total_data = 0; | |
498 | struct inode *inode = sdp->sd_rindex; | |
499 | struct gfs2_inode *ip = GFS2_I(inode); | |
7ae8fa84 RP |
500 | char buf[sizeof(struct gfs2_rindex)]; |
501 | struct file_ra_state ra_state; | |
502 | int error, rgrps; | |
503 | ||
504 | mutex_lock(&sdp->sd_rindex_mutex); | |
505 | file_ra_state_init(&ra_state, inode->i_mapping); | |
506 | for (rgrps = 0;; rgrps++) { | |
507 | loff_t pos = rgrps * sizeof(struct gfs2_rindex); | |
508 | ||
509 | if (pos + sizeof(struct gfs2_rindex) >= ip->i_di.di_size) | |
510 | break; | |
511 | error = gfs2_internal_read(ip, &ra_state, buf, &pos, | |
512 | sizeof(struct gfs2_rindex)); | |
513 | if (error != sizeof(struct gfs2_rindex)) | |
514 | break; | |
bb8d8a6f | 515 | total_data += be32_to_cpu(((struct gfs2_rindex *)buf)->ri_data); |
7ae8fa84 RP |
516 | } |
517 | mutex_unlock(&sdp->sd_rindex_mutex); | |
518 | return total_data; | |
519 | } | |
520 | ||
bb8d8a6f SW |
521 | static void gfs2_rindex_in(struct gfs2_rgrpd *rgd, const void *buf) |
522 | { | |
523 | const struct gfs2_rindex *str = buf; | |
524 | ||
525 | rgd->rd_addr = be64_to_cpu(str->ri_addr); | |
526 | rgd->rd_length = be32_to_cpu(str->ri_length); | |
527 | rgd->rd_data0 = be64_to_cpu(str->ri_data0); | |
528 | rgd->rd_data = be32_to_cpu(str->ri_data); | |
529 | rgd->rd_bitbytes = be32_to_cpu(str->ri_bitbytes); | |
530 | } | |
531 | ||
b3b94faa | 532 | /** |
6c53267f | 533 | * read_rindex_entry - Pull in a new resource index entry from the disk |
b3b94faa DT |
534 | * @gl: The glock covering the rindex inode |
535 | * | |
6c53267f RP |
536 | * Returns: 0 on success, error code otherwise |
537 | */ | |
538 | ||
539 | static int read_rindex_entry(struct gfs2_inode *ip, | |
540 | struct file_ra_state *ra_state) | |
541 | { | |
542 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
543 | loff_t pos = sdp->sd_rgrps * sizeof(struct gfs2_rindex); | |
544 | char buf[sizeof(struct gfs2_rindex)]; | |
545 | int error; | |
546 | struct gfs2_rgrpd *rgd; | |
547 | ||
548 | error = gfs2_internal_read(ip, ra_state, buf, &pos, | |
549 | sizeof(struct gfs2_rindex)); | |
550 | if (!error) | |
551 | return 0; | |
552 | if (error != sizeof(struct gfs2_rindex)) { | |
553 | if (error > 0) | |
554 | error = -EIO; | |
555 | return error; | |
556 | } | |
557 | ||
6bdd9be6 | 558 | rgd = kmem_cache_zalloc(gfs2_rgrpd_cachep, GFP_NOFS); |
6c53267f RP |
559 | error = -ENOMEM; |
560 | if (!rgd) | |
561 | return error; | |
562 | ||
563 | mutex_init(&rgd->rd_mutex); | |
564 | lops_init_le(&rgd->rd_le, &gfs2_rg_lops); | |
565 | rgd->rd_sbd = sdp; | |
566 | ||
567 | list_add_tail(&rgd->rd_list, &sdp->sd_rindex_list); | |
568 | list_add_tail(&rgd->rd_list_mru, &sdp->sd_rindex_mru_list); | |
569 | ||
bb8d8a6f | 570 | gfs2_rindex_in(rgd, buf); |
6c53267f RP |
571 | error = compute_bitstructs(rgd); |
572 | if (error) | |
573 | return error; | |
574 | ||
bb8d8a6f | 575 | error = gfs2_glock_get(sdp, rgd->rd_addr, |
6c53267f RP |
576 | &gfs2_rgrp_glops, CREATE, &rgd->rd_gl); |
577 | if (error) | |
578 | return error; | |
579 | ||
580 | rgd->rd_gl->gl_object = rgd; | |
cf45b752 | 581 | rgd->rd_flags &= ~GFS2_RDF_UPTODATE; |
c8cdf479 | 582 | rgd->rd_flags |= GFS2_RDF_CHECK; |
6c53267f RP |
583 | return error; |
584 | } | |
585 | ||
586 | /** | |
587 | * gfs2_ri_update - Pull in a new resource index from the disk | |
588 | * @ip: pointer to the rindex inode | |
589 | * | |
b3b94faa DT |
590 | * Returns: 0 on successful update, error code otherwise |
591 | */ | |
592 | ||
593 | static int gfs2_ri_update(struct gfs2_inode *ip) | |
594 | { | |
feaa7bba SW |
595 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
596 | struct inode *inode = &ip->i_inode; | |
f42faf4f | 597 | struct file_ra_state ra_state; |
cd81a4ba | 598 | u64 rgrp_count = ip->i_di.di_size; |
b3b94faa DT |
599 | int error; |
600 | ||
cd81a4ba | 601 | if (do_div(rgrp_count, sizeof(struct gfs2_rindex))) { |
b3b94faa DT |
602 | gfs2_consist_inode(ip); |
603 | return -EIO; | |
604 | } | |
605 | ||
606 | clear_rgrpdi(sdp); | |
607 | ||
f42faf4f | 608 | file_ra_state_init(&ra_state, inode->i_mapping); |
cd81a4ba | 609 | for (sdp->sd_rgrps = 0; sdp->sd_rgrps < rgrp_count; sdp->sd_rgrps++) { |
6c53267f RP |
610 | error = read_rindex_entry(ip, &ra_state); |
611 | if (error) { | |
612 | clear_rgrpdi(sdp); | |
613 | return error; | |
b3b94faa | 614 | } |
6c53267f | 615 | } |
b3b94faa | 616 | |
cf45b752 | 617 | sdp->sd_rindex_uptodate = 1; |
6c53267f RP |
618 | return 0; |
619 | } | |
b3b94faa | 620 | |
6c53267f RP |
621 | /** |
622 | * gfs2_ri_update_special - Pull in a new resource index from the disk | |
623 | * | |
624 | * This is a special version that's safe to call from gfs2_inplace_reserve_i. | |
625 | * In this case we know that we don't have any resource groups in memory yet. | |
626 | * | |
627 | * @ip: pointer to the rindex inode | |
628 | * | |
629 | * Returns: 0 on successful update, error code otherwise | |
630 | */ | |
631 | static int gfs2_ri_update_special(struct gfs2_inode *ip) | |
632 | { | |
633 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
634 | struct inode *inode = &ip->i_inode; | |
635 | struct file_ra_state ra_state; | |
636 | int error; | |
b3b94faa | 637 | |
6c53267f RP |
638 | file_ra_state_init(&ra_state, inode->i_mapping); |
639 | for (sdp->sd_rgrps = 0;; sdp->sd_rgrps++) { | |
640 | /* Ignore partials */ | |
641 | if ((sdp->sd_rgrps + 1) * sizeof(struct gfs2_rindex) > | |
642 | ip->i_di.di_size) | |
643 | break; | |
644 | error = read_rindex_entry(ip, &ra_state); | |
645 | if (error) { | |
646 | clear_rgrpdi(sdp); | |
647 | return error; | |
648 | } | |
b3b94faa DT |
649 | } |
650 | ||
cf45b752 | 651 | sdp->sd_rindex_uptodate = 1; |
b3b94faa | 652 | return 0; |
b3b94faa DT |
653 | } |
654 | ||
655 | /** | |
656 | * gfs2_rindex_hold - Grab a lock on the rindex | |
657 | * @sdp: The GFS2 superblock | |
658 | * @ri_gh: the glock holder | |
659 | * | |
660 | * We grab a lock on the rindex inode to make sure that it doesn't | |
661 | * change whilst we are performing an operation. We keep this lock | |
662 | * for quite long periods of time compared to other locks. This | |
663 | * doesn't matter, since it is shared and it is very, very rarely | |
664 | * accessed in the exclusive mode (i.e. only when expanding the filesystem). | |
665 | * | |
666 | * This makes sure that we're using the latest copy of the resource index | |
667 | * special file, which might have been updated if someone expanded the | |
668 | * filesystem (via gfs2_grow utility), which adds new resource groups. | |
669 | * | |
670 | * Returns: 0 on success, error code otherwise | |
671 | */ | |
672 | ||
673 | int gfs2_rindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ri_gh) | |
674 | { | |
feaa7bba | 675 | struct gfs2_inode *ip = GFS2_I(sdp->sd_rindex); |
b3b94faa DT |
676 | struct gfs2_glock *gl = ip->i_gl; |
677 | int error; | |
678 | ||
679 | error = gfs2_glock_nq_init(gl, LM_ST_SHARED, 0, ri_gh); | |
680 | if (error) | |
681 | return error; | |
682 | ||
683 | /* Read new copy from disk if we don't have the latest */ | |
cf45b752 | 684 | if (!sdp->sd_rindex_uptodate) { |
f55ab26a | 685 | mutex_lock(&sdp->sd_rindex_mutex); |
cf45b752 | 686 | if (!sdp->sd_rindex_uptodate) { |
b3b94faa DT |
687 | error = gfs2_ri_update(ip); |
688 | if (error) | |
689 | gfs2_glock_dq_uninit(ri_gh); | |
690 | } | |
f55ab26a | 691 | mutex_unlock(&sdp->sd_rindex_mutex); |
b3b94faa DT |
692 | } |
693 | ||
694 | return error; | |
695 | } | |
696 | ||
42d52e38 | 697 | static void gfs2_rgrp_in(struct gfs2_rgrpd *rgd, const void *buf) |
bb8d8a6f SW |
698 | { |
699 | const struct gfs2_rgrp *str = buf; | |
42d52e38 BP |
700 | struct gfs2_rgrp_host *rg = &rgd->rd_rg; |
701 | u32 rg_flags; | |
bb8d8a6f | 702 | |
42d52e38 BP |
703 | rg_flags = be32_to_cpu(str->rg_flags); |
704 | if (rg_flags & GFS2_RGF_NOALLOC) | |
705 | rgd->rd_flags |= GFS2_RDF_NOALLOC; | |
706 | else | |
707 | rgd->rd_flags &= ~GFS2_RDF_NOALLOC; | |
bb8d8a6f SW |
708 | rg->rg_free = be32_to_cpu(str->rg_free); |
709 | rg->rg_dinodes = be32_to_cpu(str->rg_dinodes); | |
710 | rg->rg_igeneration = be64_to_cpu(str->rg_igeneration); | |
711 | } | |
712 | ||
42d52e38 | 713 | static void gfs2_rgrp_out(struct gfs2_rgrpd *rgd, void *buf) |
bb8d8a6f SW |
714 | { |
715 | struct gfs2_rgrp *str = buf; | |
42d52e38 BP |
716 | struct gfs2_rgrp_host *rg = &rgd->rd_rg; |
717 | u32 rg_flags = 0; | |
bb8d8a6f | 718 | |
42d52e38 BP |
719 | if (rgd->rd_flags & GFS2_RDF_NOALLOC) |
720 | rg_flags |= GFS2_RGF_NOALLOC; | |
721 | str->rg_flags = cpu_to_be32(rg_flags); | |
bb8d8a6f SW |
722 | str->rg_free = cpu_to_be32(rg->rg_free); |
723 | str->rg_dinodes = cpu_to_be32(rg->rg_dinodes); | |
724 | str->__pad = cpu_to_be32(0); | |
725 | str->rg_igeneration = cpu_to_be64(rg->rg_igeneration); | |
726 | memset(&str->rg_reserved, 0, sizeof(str->rg_reserved)); | |
727 | } | |
728 | ||
b3b94faa DT |
729 | /** |
730 | * gfs2_rgrp_bh_get - Read in a RG's header and bitmaps | |
731 | * @rgd: the struct gfs2_rgrpd describing the RG to read in | |
732 | * | |
733 | * Read in all of a Resource Group's header and bitmap blocks. | |
734 | * Caller must eventually call gfs2_rgrp_relse() to free the bitmaps. | |
735 | * | |
736 | * Returns: errno | |
737 | */ | |
738 | ||
739 | int gfs2_rgrp_bh_get(struct gfs2_rgrpd *rgd) | |
740 | { | |
741 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
742 | struct gfs2_glock *gl = rgd->rd_gl; | |
bb8d8a6f | 743 | unsigned int length = rgd->rd_length; |
b3b94faa DT |
744 | struct gfs2_bitmap *bi; |
745 | unsigned int x, y; | |
746 | int error; | |
747 | ||
f55ab26a | 748 | mutex_lock(&rgd->rd_mutex); |
b3b94faa DT |
749 | |
750 | spin_lock(&sdp->sd_rindex_spin); | |
751 | if (rgd->rd_bh_count) { | |
752 | rgd->rd_bh_count++; | |
753 | spin_unlock(&sdp->sd_rindex_spin); | |
f55ab26a | 754 | mutex_unlock(&rgd->rd_mutex); |
b3b94faa DT |
755 | return 0; |
756 | } | |
757 | spin_unlock(&sdp->sd_rindex_spin); | |
758 | ||
759 | for (x = 0; x < length; x++) { | |
760 | bi = rgd->rd_bits + x; | |
bb8d8a6f | 761 | error = gfs2_meta_read(gl, rgd->rd_addr + x, 0, &bi->bi_bh); |
b3b94faa DT |
762 | if (error) |
763 | goto fail; | |
764 | } | |
765 | ||
766 | for (y = length; y--;) { | |
767 | bi = rgd->rd_bits + y; | |
7276b3b0 | 768 | error = gfs2_meta_wait(sdp, bi->bi_bh); |
b3b94faa DT |
769 | if (error) |
770 | goto fail; | |
feaa7bba | 771 | if (gfs2_metatype_check(sdp, bi->bi_bh, y ? GFS2_METATYPE_RB : |
b3b94faa DT |
772 | GFS2_METATYPE_RG)) { |
773 | error = -EIO; | |
774 | goto fail; | |
775 | } | |
776 | } | |
777 | ||
cf45b752 | 778 | if (!(rgd->rd_flags & GFS2_RDF_UPTODATE)) { |
42d52e38 | 779 | gfs2_rgrp_in(rgd, (rgd->rd_bits[0].bi_bh)->b_data); |
cf45b752 | 780 | rgd->rd_flags |= GFS2_RDF_UPTODATE; |
b3b94faa DT |
781 | } |
782 | ||
783 | spin_lock(&sdp->sd_rindex_spin); | |
784 | rgd->rd_free_clone = rgd->rd_rg.rg_free; | |
785 | rgd->rd_bh_count++; | |
786 | spin_unlock(&sdp->sd_rindex_spin); | |
787 | ||
f55ab26a | 788 | mutex_unlock(&rgd->rd_mutex); |
b3b94faa DT |
789 | |
790 | return 0; | |
791 | ||
feaa7bba | 792 | fail: |
b3b94faa DT |
793 | while (x--) { |
794 | bi = rgd->rd_bits + x; | |
795 | brelse(bi->bi_bh); | |
796 | bi->bi_bh = NULL; | |
797 | gfs2_assert_warn(sdp, !bi->bi_clone); | |
798 | } | |
f55ab26a | 799 | mutex_unlock(&rgd->rd_mutex); |
b3b94faa DT |
800 | |
801 | return error; | |
802 | } | |
803 | ||
804 | void gfs2_rgrp_bh_hold(struct gfs2_rgrpd *rgd) | |
805 | { | |
806 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
807 | ||
808 | spin_lock(&sdp->sd_rindex_spin); | |
809 | gfs2_assert_warn(rgd->rd_sbd, rgd->rd_bh_count); | |
810 | rgd->rd_bh_count++; | |
811 | spin_unlock(&sdp->sd_rindex_spin); | |
812 | } | |
813 | ||
814 | /** | |
815 | * gfs2_rgrp_bh_put - Release RG bitmaps read in with gfs2_rgrp_bh_get() | |
816 | * @rgd: the struct gfs2_rgrpd describing the RG to read in | |
817 | * | |
818 | */ | |
819 | ||
820 | void gfs2_rgrp_bh_put(struct gfs2_rgrpd *rgd) | |
821 | { | |
822 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
bb8d8a6f | 823 | int x, length = rgd->rd_length; |
b3b94faa DT |
824 | |
825 | spin_lock(&sdp->sd_rindex_spin); | |
826 | gfs2_assert_warn(rgd->rd_sbd, rgd->rd_bh_count); | |
827 | if (--rgd->rd_bh_count) { | |
828 | spin_unlock(&sdp->sd_rindex_spin); | |
829 | return; | |
830 | } | |
831 | ||
832 | for (x = 0; x < length; x++) { | |
833 | struct gfs2_bitmap *bi = rgd->rd_bits + x; | |
834 | kfree(bi->bi_clone); | |
835 | bi->bi_clone = NULL; | |
836 | brelse(bi->bi_bh); | |
837 | bi->bi_bh = NULL; | |
838 | } | |
839 | ||
840 | spin_unlock(&sdp->sd_rindex_spin); | |
841 | } | |
842 | ||
843 | void gfs2_rgrp_repolish_clones(struct gfs2_rgrpd *rgd) | |
844 | { | |
845 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
bb8d8a6f | 846 | unsigned int length = rgd->rd_length; |
b3b94faa DT |
847 | unsigned int x; |
848 | ||
849 | for (x = 0; x < length; x++) { | |
850 | struct gfs2_bitmap *bi = rgd->rd_bits + x; | |
851 | if (!bi->bi_clone) | |
852 | continue; | |
853 | memcpy(bi->bi_clone + bi->bi_offset, | |
feaa7bba | 854 | bi->bi_bh->b_data + bi->bi_offset, bi->bi_len); |
b3b94faa DT |
855 | } |
856 | ||
857 | spin_lock(&sdp->sd_rindex_spin); | |
858 | rgd->rd_free_clone = rgd->rd_rg.rg_free; | |
859 | spin_unlock(&sdp->sd_rindex_spin); | |
860 | } | |
861 | ||
862 | /** | |
863 | * gfs2_alloc_get - get the struct gfs2_alloc structure for an inode | |
864 | * @ip: the incore GFS2 inode structure | |
865 | * | |
866 | * Returns: the struct gfs2_alloc | |
867 | */ | |
868 | ||
869 | struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip) | |
870 | { | |
6dbd8224 SW |
871 | BUG_ON(ip->i_alloc != NULL); |
872 | ip->i_alloc = kzalloc(sizeof(struct gfs2_alloc), GFP_KERNEL); | |
873 | return ip->i_alloc; | |
b3b94faa DT |
874 | } |
875 | ||
b3b94faa DT |
876 | /** |
877 | * try_rgrp_fit - See if a given reservation will fit in a given RG | |
878 | * @rgd: the RG data | |
879 | * @al: the struct gfs2_alloc structure describing the reservation | |
880 | * | |
881 | * If there's room for the requested blocks to be allocated from the RG: | |
b3b94faa DT |
882 | * Sets the $al_rgd field in @al. |
883 | * | |
884 | * Returns: 1 on success (it fits), 0 on failure (it doesn't fit) | |
885 | */ | |
886 | ||
887 | static int try_rgrp_fit(struct gfs2_rgrpd *rgd, struct gfs2_alloc *al) | |
888 | { | |
889 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
890 | int ret = 0; | |
891 | ||
42d52e38 | 892 | if (rgd->rd_flags & GFS2_RDF_NOALLOC) |
a43a4906 SW |
893 | return 0; |
894 | ||
b3b94faa DT |
895 | spin_lock(&sdp->sd_rindex_spin); |
896 | if (rgd->rd_free_clone >= al->al_requested) { | |
897 | al->al_rgd = rgd; | |
898 | ret = 1; | |
899 | } | |
900 | spin_unlock(&sdp->sd_rindex_spin); | |
901 | ||
902 | return ret; | |
903 | } | |
904 | ||
c8cdf479 SW |
905 | /** |
906 | * try_rgrp_unlink - Look for any unlinked, allocated, but unused inodes | |
907 | * @rgd: The rgrp | |
908 | * | |
909 | * Returns: The inode, if one has been found | |
910 | */ | |
911 | ||
912 | static struct inode *try_rgrp_unlink(struct gfs2_rgrpd *rgd, u64 *last_unlinked) | |
913 | { | |
914 | struct inode *inode; | |
6760bdcd | 915 | u32 goal = 0, block; |
bb9bcf06 | 916 | u64 no_addr; |
5f3eae75 | 917 | struct gfs2_sbd *sdp = rgd->rd_sbd; |
b45e41d7 | 918 | unsigned int n; |
c8cdf479 SW |
919 | |
920 | for(;;) { | |
24c73873 BP |
921 | if (goal >= rgd->rd_data) |
922 | break; | |
5f3eae75 | 923 | down_write(&sdp->sd_log_flush_lock); |
b45e41d7 | 924 | n = 1; |
6760bdcd | 925 | block = rgblk_search(rgd, goal, GFS2_BLKST_UNLINKED, |
b45e41d7 | 926 | GFS2_BLKST_UNLINKED, &n); |
5f3eae75 | 927 | up_write(&sdp->sd_log_flush_lock); |
6760bdcd | 928 | if (block == BFITNOENT) |
24c73873 | 929 | break; |
6760bdcd BP |
930 | /* rgblk_search can return a block < goal, so we need to |
931 | keep it marching forward. */ | |
932 | no_addr = block + rgd->rd_data0; | |
24c73873 | 933 | goal++; |
6760bdcd | 934 | if (*last_unlinked != NO_BLOCK && no_addr <= *last_unlinked) |
c8cdf479 | 935 | continue; |
bb9bcf06 WC |
936 | *last_unlinked = no_addr; |
937 | inode = gfs2_inode_lookup(rgd->rd_sbd->sd_vfs, DT_UNKNOWN, | |
7a9f53b3 | 938 | no_addr, -1, 1); |
c8cdf479 SW |
939 | if (!IS_ERR(inode)) |
940 | return inode; | |
941 | } | |
942 | ||
943 | rgd->rd_flags &= ~GFS2_RDF_CHECK; | |
944 | return NULL; | |
945 | } | |
946 | ||
b3b94faa DT |
947 | /** |
948 | * recent_rgrp_first - get first RG from "recent" list | |
949 | * @sdp: The GFS2 superblock | |
950 | * @rglast: address of the rgrp used last | |
951 | * | |
952 | * Returns: The first rgrp in the recent list | |
953 | */ | |
954 | ||
955 | static struct gfs2_rgrpd *recent_rgrp_first(struct gfs2_sbd *sdp, | |
cd915493 | 956 | u64 rglast) |
b3b94faa | 957 | { |
ce276b06 | 958 | struct gfs2_rgrpd *rgd; |
b3b94faa DT |
959 | |
960 | spin_lock(&sdp->sd_rindex_spin); | |
961 | ||
ce276b06 SW |
962 | if (rglast) { |
963 | list_for_each_entry(rgd, &sdp->sd_rindex_recent_list, rd_recent) { | |
964 | if (rgrp_contains_block(rgd, rglast)) | |
965 | goto out; | |
966 | } | |
b3b94faa | 967 | } |
ce276b06 SW |
968 | rgd = NULL; |
969 | if (!list_empty(&sdp->sd_rindex_recent_list)) | |
970 | rgd = list_entry(sdp->sd_rindex_recent_list.next, | |
971 | struct gfs2_rgrpd, rd_recent); | |
feaa7bba | 972 | out: |
b3b94faa | 973 | spin_unlock(&sdp->sd_rindex_spin); |
b3b94faa DT |
974 | return rgd; |
975 | } | |
976 | ||
977 | /** | |
978 | * recent_rgrp_next - get next RG from "recent" list | |
979 | * @cur_rgd: current rgrp | |
980 | * @remove: | |
981 | * | |
982 | * Returns: The next rgrp in the recent list | |
983 | */ | |
984 | ||
985 | static struct gfs2_rgrpd *recent_rgrp_next(struct gfs2_rgrpd *cur_rgd, | |
986 | int remove) | |
987 | { | |
988 | struct gfs2_sbd *sdp = cur_rgd->rd_sbd; | |
989 | struct list_head *head; | |
990 | struct gfs2_rgrpd *rgd; | |
991 | ||
992 | spin_lock(&sdp->sd_rindex_spin); | |
993 | ||
994 | head = &sdp->sd_rindex_recent_list; | |
995 | ||
996 | list_for_each_entry(rgd, head, rd_recent) { | |
997 | if (rgd == cur_rgd) { | |
998 | if (cur_rgd->rd_recent.next != head) | |
999 | rgd = list_entry(cur_rgd->rd_recent.next, | |
1000 | struct gfs2_rgrpd, rd_recent); | |
1001 | else | |
1002 | rgd = NULL; | |
1003 | ||
1004 | if (remove) | |
1005 | list_del(&cur_rgd->rd_recent); | |
1006 | ||
1007 | goto out; | |
1008 | } | |
1009 | } | |
1010 | ||
1011 | rgd = NULL; | |
1012 | if (!list_empty(head)) | |
1013 | rgd = list_entry(head->next, struct gfs2_rgrpd, rd_recent); | |
1014 | ||
feaa7bba | 1015 | out: |
b3b94faa | 1016 | spin_unlock(&sdp->sd_rindex_spin); |
b3b94faa DT |
1017 | return rgd; |
1018 | } | |
1019 | ||
1020 | /** | |
1021 | * recent_rgrp_add - add an RG to tail of "recent" list | |
1022 | * @new_rgd: The rgrp to add | |
1023 | * | |
1024 | */ | |
1025 | ||
1026 | static void recent_rgrp_add(struct gfs2_rgrpd *new_rgd) | |
1027 | { | |
1028 | struct gfs2_sbd *sdp = new_rgd->rd_sbd; | |
1029 | struct gfs2_rgrpd *rgd; | |
1030 | unsigned int count = 0; | |
1031 | unsigned int max = sdp->sd_rgrps / gfs2_jindex_size(sdp); | |
1032 | ||
1033 | spin_lock(&sdp->sd_rindex_spin); | |
1034 | ||
1035 | list_for_each_entry(rgd, &sdp->sd_rindex_recent_list, rd_recent) { | |
1036 | if (rgd == new_rgd) | |
1037 | goto out; | |
1038 | ||
1039 | if (++count >= max) | |
1040 | goto out; | |
1041 | } | |
1042 | list_add_tail(&new_rgd->rd_recent, &sdp->sd_rindex_recent_list); | |
1043 | ||
feaa7bba | 1044 | out: |
b3b94faa DT |
1045 | spin_unlock(&sdp->sd_rindex_spin); |
1046 | } | |
1047 | ||
1048 | /** | |
1049 | * forward_rgrp_get - get an rgrp to try next from full list | |
1050 | * @sdp: The GFS2 superblock | |
1051 | * | |
1052 | * Returns: The rgrp to try next | |
1053 | */ | |
1054 | ||
1055 | static struct gfs2_rgrpd *forward_rgrp_get(struct gfs2_sbd *sdp) | |
1056 | { | |
1057 | struct gfs2_rgrpd *rgd; | |
1058 | unsigned int journals = gfs2_jindex_size(sdp); | |
1059 | unsigned int rg = 0, x; | |
1060 | ||
1061 | spin_lock(&sdp->sd_rindex_spin); | |
1062 | ||
1063 | rgd = sdp->sd_rindex_forward; | |
1064 | if (!rgd) { | |
1065 | if (sdp->sd_rgrps >= journals) | |
1066 | rg = sdp->sd_rgrps * sdp->sd_jdesc->jd_jid / journals; | |
1067 | ||
b8e1aabf | 1068 | for (x = 0, rgd = gfs2_rgrpd_get_first(sdp); x < rg; |
b3b94faa DT |
1069 | x++, rgd = gfs2_rgrpd_get_next(rgd)) |
1070 | /* Do Nothing */; | |
1071 | ||
1072 | sdp->sd_rindex_forward = rgd; | |
1073 | } | |
1074 | ||
1075 | spin_unlock(&sdp->sd_rindex_spin); | |
1076 | ||
1077 | return rgd; | |
1078 | } | |
1079 | ||
1080 | /** | |
1081 | * forward_rgrp_set - set the forward rgrp pointer | |
1082 | * @sdp: the filesystem | |
1083 | * @rgd: The new forward rgrp | |
1084 | * | |
1085 | */ | |
1086 | ||
1087 | static void forward_rgrp_set(struct gfs2_sbd *sdp, struct gfs2_rgrpd *rgd) | |
1088 | { | |
1089 | spin_lock(&sdp->sd_rindex_spin); | |
1090 | sdp->sd_rindex_forward = rgd; | |
1091 | spin_unlock(&sdp->sd_rindex_spin); | |
1092 | } | |
1093 | ||
1094 | /** | |
1095 | * get_local_rgrp - Choose and lock a rgrp for allocation | |
1096 | * @ip: the inode to reserve space for | |
1097 | * @rgp: the chosen and locked rgrp | |
1098 | * | |
1099 | * Try to acquire rgrp in way which avoids contending with others. | |
1100 | * | |
1101 | * Returns: errno | |
1102 | */ | |
1103 | ||
c8cdf479 | 1104 | static struct inode *get_local_rgrp(struct gfs2_inode *ip, u64 *last_unlinked) |
b3b94faa | 1105 | { |
c8cdf479 | 1106 | struct inode *inode = NULL; |
feaa7bba | 1107 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 1108 | struct gfs2_rgrpd *rgd, *begin = NULL; |
6dbd8224 | 1109 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
1110 | int flags = LM_FLAG_TRY; |
1111 | int skipped = 0; | |
1112 | int loops = 0; | |
292c8c14 | 1113 | int error, rg_locked; |
b3b94faa DT |
1114 | |
1115 | /* Try recently successful rgrps */ | |
1116 | ||
ce276b06 | 1117 | rgd = recent_rgrp_first(sdp, ip->i_goal); |
b3b94faa DT |
1118 | |
1119 | while (rgd) { | |
292c8c14 AD |
1120 | rg_locked = 0; |
1121 | ||
1122 | if (gfs2_glock_is_locked_by_me(rgd->rd_gl)) { | |
1123 | rg_locked = 1; | |
1124 | error = 0; | |
1125 | } else { | |
1126 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, | |
1127 | LM_FLAG_TRY, &al->al_rgd_gh); | |
1128 | } | |
b3b94faa DT |
1129 | switch (error) { |
1130 | case 0: | |
1131 | if (try_rgrp_fit(rgd, al)) | |
1132 | goto out; | |
c8cdf479 SW |
1133 | if (rgd->rd_flags & GFS2_RDF_CHECK) |
1134 | inode = try_rgrp_unlink(rgd, last_unlinked); | |
292c8c14 AD |
1135 | if (!rg_locked) |
1136 | gfs2_glock_dq_uninit(&al->al_rgd_gh); | |
c8cdf479 SW |
1137 | if (inode) |
1138 | return inode; | |
b3b94faa DT |
1139 | rgd = recent_rgrp_next(rgd, 1); |
1140 | break; | |
1141 | ||
1142 | case GLR_TRYFAILED: | |
1143 | rgd = recent_rgrp_next(rgd, 0); | |
1144 | break; | |
1145 | ||
1146 | default: | |
c8cdf479 | 1147 | return ERR_PTR(error); |
b3b94faa DT |
1148 | } |
1149 | } | |
1150 | ||
1151 | /* Go through full list of rgrps */ | |
1152 | ||
1153 | begin = rgd = forward_rgrp_get(sdp); | |
1154 | ||
1155 | for (;;) { | |
292c8c14 AD |
1156 | rg_locked = 0; |
1157 | ||
1158 | if (gfs2_glock_is_locked_by_me(rgd->rd_gl)) { | |
1159 | rg_locked = 1; | |
1160 | error = 0; | |
1161 | } else { | |
1162 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, flags, | |
1163 | &al->al_rgd_gh); | |
1164 | } | |
b3b94faa DT |
1165 | switch (error) { |
1166 | case 0: | |
1167 | if (try_rgrp_fit(rgd, al)) | |
1168 | goto out; | |
c8cdf479 SW |
1169 | if (rgd->rd_flags & GFS2_RDF_CHECK) |
1170 | inode = try_rgrp_unlink(rgd, last_unlinked); | |
292c8c14 AD |
1171 | if (!rg_locked) |
1172 | gfs2_glock_dq_uninit(&al->al_rgd_gh); | |
c8cdf479 SW |
1173 | if (inode) |
1174 | return inode; | |
b3b94faa DT |
1175 | break; |
1176 | ||
1177 | case GLR_TRYFAILED: | |
1178 | skipped++; | |
1179 | break; | |
1180 | ||
1181 | default: | |
c8cdf479 | 1182 | return ERR_PTR(error); |
b3b94faa DT |
1183 | } |
1184 | ||
1185 | rgd = gfs2_rgrpd_get_next(rgd); | |
1186 | if (!rgd) | |
1187 | rgd = gfs2_rgrpd_get_first(sdp); | |
1188 | ||
1189 | if (rgd == begin) { | |
172e045a | 1190 | if (++loops >= 3) |
c8cdf479 | 1191 | return ERR_PTR(-ENOSPC); |
172e045a BM |
1192 | if (!skipped) |
1193 | loops++; | |
b3b94faa | 1194 | flags = 0; |
172e045a BM |
1195 | if (loops == 2) |
1196 | gfs2_log_flush(sdp, NULL); | |
b3b94faa DT |
1197 | } |
1198 | } | |
1199 | ||
feaa7bba | 1200 | out: |
b3b94faa DT |
1201 | if (begin) { |
1202 | recent_rgrp_add(rgd); | |
1203 | rgd = gfs2_rgrpd_get_next(rgd); | |
1204 | if (!rgd) | |
1205 | rgd = gfs2_rgrpd_get_first(sdp); | |
1206 | forward_rgrp_set(sdp, rgd); | |
1207 | } | |
1208 | ||
c8cdf479 | 1209 | return NULL; |
b3b94faa DT |
1210 | } |
1211 | ||
1212 | /** | |
1213 | * gfs2_inplace_reserve_i - Reserve space in the filesystem | |
1214 | * @ip: the inode to reserve space for | |
1215 | * | |
1216 | * Returns: errno | |
1217 | */ | |
1218 | ||
1219 | int gfs2_inplace_reserve_i(struct gfs2_inode *ip, char *file, unsigned int line) | |
1220 | { | |
feaa7bba | 1221 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 1222 | struct gfs2_alloc *al = ip->i_alloc; |
c8cdf479 | 1223 | struct inode *inode; |
7ae8fa84 | 1224 | int error = 0; |
6760bdcd | 1225 | u64 last_unlinked = NO_BLOCK; |
b3b94faa DT |
1226 | |
1227 | if (gfs2_assert_warn(sdp, al->al_requested)) | |
1228 | return -EINVAL; | |
1229 | ||
c8cdf479 | 1230 | try_again: |
7ae8fa84 RP |
1231 | /* We need to hold the rindex unless the inode we're using is |
1232 | the rindex itself, in which case it's already held. */ | |
1233 | if (ip != GFS2_I(sdp->sd_rindex)) | |
1234 | error = gfs2_rindex_hold(sdp, &al->al_ri_gh); | |
1235 | else if (!sdp->sd_rgrps) /* We may not have the rindex read in, so: */ | |
6c53267f | 1236 | error = gfs2_ri_update_special(ip); |
7ae8fa84 | 1237 | |
b3b94faa DT |
1238 | if (error) |
1239 | return error; | |
1240 | ||
c8cdf479 SW |
1241 | inode = get_local_rgrp(ip, &last_unlinked); |
1242 | if (inode) { | |
7ae8fa84 RP |
1243 | if (ip != GFS2_I(sdp->sd_rindex)) |
1244 | gfs2_glock_dq_uninit(&al->al_ri_gh); | |
c8cdf479 SW |
1245 | if (IS_ERR(inode)) |
1246 | return PTR_ERR(inode); | |
1247 | iput(inode); | |
1248 | gfs2_log_flush(sdp, NULL); | |
1249 | goto try_again; | |
b3b94faa DT |
1250 | } |
1251 | ||
1252 | al->al_file = file; | |
1253 | al->al_line = line; | |
1254 | ||
1255 | return 0; | |
1256 | } | |
1257 | ||
1258 | /** | |
1259 | * gfs2_inplace_release - release an inplace reservation | |
1260 | * @ip: the inode the reservation was taken out on | |
1261 | * | |
1262 | * Release a reservation made by gfs2_inplace_reserve(). | |
1263 | */ | |
1264 | ||
1265 | void gfs2_inplace_release(struct gfs2_inode *ip) | |
1266 | { | |
feaa7bba | 1267 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 1268 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
1269 | |
1270 | if (gfs2_assert_warn(sdp, al->al_alloced <= al->al_requested) == -1) | |
1271 | fs_warn(sdp, "al_alloced = %u, al_requested = %u " | |
1272 | "al_file = %s, al_line = %u\n", | |
1273 | al->al_alloced, al->al_requested, al->al_file, | |
1274 | al->al_line); | |
1275 | ||
1276 | al->al_rgd = NULL; | |
292c8c14 AD |
1277 | if (al->al_rgd_gh.gh_gl) |
1278 | gfs2_glock_dq_uninit(&al->al_rgd_gh); | |
7ae8fa84 RP |
1279 | if (ip != GFS2_I(sdp->sd_rindex)) |
1280 | gfs2_glock_dq_uninit(&al->al_ri_gh); | |
b3b94faa DT |
1281 | } |
1282 | ||
1283 | /** | |
1284 | * gfs2_get_block_type - Check a block in a RG is of given type | |
1285 | * @rgd: the resource group holding the block | |
1286 | * @block: the block number | |
1287 | * | |
1288 | * Returns: The block type (GFS2_BLKST_*) | |
1289 | */ | |
1290 | ||
cd915493 | 1291 | unsigned char gfs2_get_block_type(struct gfs2_rgrpd *rgd, u64 block) |
b3b94faa DT |
1292 | { |
1293 | struct gfs2_bitmap *bi = NULL; | |
cd915493 | 1294 | u32 length, rgrp_block, buf_block; |
b3b94faa DT |
1295 | unsigned int buf; |
1296 | unsigned char type; | |
1297 | ||
bb8d8a6f SW |
1298 | length = rgd->rd_length; |
1299 | rgrp_block = block - rgd->rd_data0; | |
b3b94faa DT |
1300 | |
1301 | for (buf = 0; buf < length; buf++) { | |
1302 | bi = rgd->rd_bits + buf; | |
1303 | if (rgrp_block < (bi->bi_start + bi->bi_len) * GFS2_NBBY) | |
1304 | break; | |
1305 | } | |
1306 | ||
1307 | gfs2_assert(rgd->rd_sbd, buf < length); | |
1308 | buf_block = rgrp_block - bi->bi_start * GFS2_NBBY; | |
1309 | ||
feaa7bba | 1310 | type = gfs2_testbit(rgd, bi->bi_bh->b_data + bi->bi_offset, |
b3b94faa DT |
1311 | bi->bi_len, buf_block); |
1312 | ||
1313 | return type; | |
1314 | } | |
1315 | ||
1316 | /** | |
1317 | * rgblk_search - find a block in @old_state, change allocation | |
1318 | * state to @new_state | |
1319 | * @rgd: the resource group descriptor | |
1320 | * @goal: the goal block within the RG (start here to search for avail block) | |
1321 | * @old_state: GFS2_BLKST_XXX the before-allocation state to find | |
1322 | * @new_state: GFS2_BLKST_XXX the after-allocation block state | |
b45e41d7 | 1323 | * @n: The extent length |
b3b94faa DT |
1324 | * |
1325 | * Walk rgrp's bitmap to find bits that represent a block in @old_state. | |
1326 | * Add the found bitmap buffer to the transaction. | |
1327 | * Set the found bits to @new_state to change block's allocation state. | |
1328 | * | |
1329 | * This function never fails, because we wouldn't call it unless we | |
1330 | * know (from reservation results, etc.) that a block is available. | |
1331 | * | |
1332 | * Scope of @goal and returned block is just within rgrp, not the whole | |
1333 | * filesystem. | |
1334 | * | |
1335 | * Returns: the block number allocated | |
1336 | */ | |
1337 | ||
cd915493 | 1338 | static u32 rgblk_search(struct gfs2_rgrpd *rgd, u32 goal, |
b45e41d7 SW |
1339 | unsigned char old_state, unsigned char new_state, |
1340 | unsigned int *n) | |
b3b94faa DT |
1341 | { |
1342 | struct gfs2_bitmap *bi = NULL; | |
b45e41d7 | 1343 | const u32 length = rgd->rd_length; |
cd915493 | 1344 | u32 blk = 0; |
b3b94faa | 1345 | unsigned int buf, x; |
b45e41d7 SW |
1346 | const unsigned int elen = *n; |
1347 | const u8 *buffer; | |
b3b94faa | 1348 | |
b45e41d7 | 1349 | *n = 0; |
b3b94faa DT |
1350 | /* Find bitmap block that contains bits for goal block */ |
1351 | for (buf = 0; buf < length; buf++) { | |
1352 | bi = rgd->rd_bits + buf; | |
1353 | if (goal < (bi->bi_start + bi->bi_len) * GFS2_NBBY) | |
1354 | break; | |
1355 | } | |
1356 | ||
1357 | gfs2_assert(rgd->rd_sbd, buf < length); | |
1358 | ||
1359 | /* Convert scope of "goal" from rgrp-wide to within found bit block */ | |
1360 | goal -= bi->bi_start * GFS2_NBBY; | |
1361 | ||
1362 | /* Search (up to entire) bitmap in this rgrp for allocatable block. | |
1363 | "x <= length", instead of "x < length", because we typically start | |
1364 | the search in the middle of a bit block, but if we can't find an | |
1365 | allocatable block anywhere else, we want to be able wrap around and | |
1366 | search in the first part of our first-searched bit block. */ | |
1367 | for (x = 0; x <= length; x++) { | |
5f3eae75 BP |
1368 | /* The GFS2_BLKST_UNLINKED state doesn't apply to the clone |
1369 | bitmaps, so we must search the originals for that. */ | |
b45e41d7 | 1370 | buffer = bi->bi_bh->b_data + bi->bi_offset; |
5f3eae75 | 1371 | if (old_state != GFS2_BLKST_UNLINKED && bi->bi_clone) |
110acf38 SW |
1372 | buffer = bi->bi_clone + bi->bi_offset; |
1373 | ||
1374 | blk = gfs2_bitfit(buffer, bi->bi_len, goal, old_state); | |
b3b94faa DT |
1375 | if (blk != BFITNOENT) |
1376 | break; | |
1377 | ||
1378 | /* Try next bitmap block (wrap back to rgrp header if at end) */ | |
1379 | buf = (buf + 1) % length; | |
1380 | bi = rgd->rd_bits + buf; | |
1381 | goal = 0; | |
1382 | } | |
1383 | ||
6760bdcd | 1384 | if (blk != BFITNOENT && old_state != new_state) { |
b45e41d7 | 1385 | *n = 1; |
c8cdf479 | 1386 | gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1); |
b45e41d7 | 1387 | gfs2_setbit(rgd, bi->bi_bh->b_data, bi->bi_clone, bi->bi_offset, |
b3b94faa | 1388 | bi->bi_len, blk, new_state); |
9b8c81d1 SW |
1389 | goal = blk; |
1390 | while (*n < elen) { | |
b45e41d7 | 1391 | goal++; |
9b8c81d1 | 1392 | if (goal >= (bi->bi_len * GFS2_NBBY)) |
b45e41d7 SW |
1393 | break; |
1394 | if (gfs2_testbit(rgd, buffer, bi->bi_len, goal) != | |
1395 | GFS2_BLKST_FREE) | |
1396 | break; | |
b45e41d7 | 1397 | gfs2_setbit(rgd, bi->bi_bh->b_data, bi->bi_clone, |
9b8c81d1 SW |
1398 | bi->bi_offset, bi->bi_len, goal, |
1399 | new_state); | |
1400 | (*n)++; | |
b45e41d7 | 1401 | } |
c8cdf479 | 1402 | } |
b3b94faa | 1403 | |
6eefaf61 | 1404 | return (blk == BFITNOENT) ? blk : (bi->bi_start * GFS2_NBBY) + blk; |
b3b94faa DT |
1405 | } |
1406 | ||
1407 | /** | |
1408 | * rgblk_free - Change alloc state of given block(s) | |
1409 | * @sdp: the filesystem | |
1410 | * @bstart: the start of a run of blocks to free | |
1411 | * @blen: the length of the block run (all must lie within ONE RG!) | |
1412 | * @new_state: GFS2_BLKST_XXX the after-allocation block state | |
1413 | * | |
1414 | * Returns: Resource group containing the block(s) | |
1415 | */ | |
1416 | ||
cd915493 SW |
1417 | static struct gfs2_rgrpd *rgblk_free(struct gfs2_sbd *sdp, u64 bstart, |
1418 | u32 blen, unsigned char new_state) | |
b3b94faa DT |
1419 | { |
1420 | struct gfs2_rgrpd *rgd; | |
1421 | struct gfs2_bitmap *bi = NULL; | |
cd915493 | 1422 | u32 length, rgrp_blk, buf_blk; |
b3b94faa DT |
1423 | unsigned int buf; |
1424 | ||
1425 | rgd = gfs2_blk2rgrpd(sdp, bstart); | |
1426 | if (!rgd) { | |
1427 | if (gfs2_consist(sdp)) | |
382066da | 1428 | fs_err(sdp, "block = %llu\n", (unsigned long long)bstart); |
b3b94faa DT |
1429 | return NULL; |
1430 | } | |
1431 | ||
bb8d8a6f | 1432 | length = rgd->rd_length; |
b3b94faa | 1433 | |
bb8d8a6f | 1434 | rgrp_blk = bstart - rgd->rd_data0; |
b3b94faa DT |
1435 | |
1436 | while (blen--) { | |
1437 | for (buf = 0; buf < length; buf++) { | |
1438 | bi = rgd->rd_bits + buf; | |
1439 | if (rgrp_blk < (bi->bi_start + bi->bi_len) * GFS2_NBBY) | |
1440 | break; | |
1441 | } | |
1442 | ||
1443 | gfs2_assert(rgd->rd_sbd, buf < length); | |
1444 | ||
1445 | buf_blk = rgrp_blk - bi->bi_start * GFS2_NBBY; | |
1446 | rgrp_blk++; | |
1447 | ||
1448 | if (!bi->bi_clone) { | |
1449 | bi->bi_clone = kmalloc(bi->bi_bh->b_size, | |
dd894be8 | 1450 | GFP_NOFS | __GFP_NOFAIL); |
b3b94faa DT |
1451 | memcpy(bi->bi_clone + bi->bi_offset, |
1452 | bi->bi_bh->b_data + bi->bi_offset, | |
1453 | bi->bi_len); | |
1454 | } | |
d4e9c4c3 | 1455 | gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1); |
b45e41d7 | 1456 | gfs2_setbit(rgd, bi->bi_bh->b_data, NULL, bi->bi_offset, |
b3b94faa DT |
1457 | bi->bi_len, buf_blk, new_state); |
1458 | } | |
1459 | ||
1460 | return rgd; | |
1461 | } | |
1462 | ||
1463 | /** | |
1639431a SW |
1464 | * gfs2_alloc_block - Allocate a block |
1465 | * @ip: the inode to allocate the block for | |
b3b94faa DT |
1466 | * |
1467 | * Returns: the allocated block | |
1468 | */ | |
1469 | ||
b45e41d7 | 1470 | u64 gfs2_alloc_block(struct gfs2_inode *ip, unsigned int *n) |
b3b94faa | 1471 | { |
feaa7bba | 1472 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 1473 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa | 1474 | struct gfs2_rgrpd *rgd = al->al_rgd; |
cd915493 SW |
1475 | u32 goal, blk; |
1476 | u64 block; | |
b3b94faa | 1477 | |
ce276b06 SW |
1478 | if (rgrp_contains_block(rgd, ip->i_goal)) |
1479 | goal = ip->i_goal - rgd->rd_data0; | |
b3b94faa | 1480 | else |
ac576cc5 | 1481 | goal = rgd->rd_last_alloc; |
b3b94faa | 1482 | |
b45e41d7 | 1483 | blk = rgblk_search(rgd, goal, GFS2_BLKST_FREE, GFS2_BLKST_USED, n); |
6eefaf61 | 1484 | BUG_ON(blk == BFITNOENT); |
b3b94faa | 1485 | |
b45e41d7 | 1486 | rgd->rd_last_alloc = blk; |
bb8d8a6f | 1487 | block = rgd->rd_data0 + blk; |
ce276b06 | 1488 | ip->i_goal = block; |
b3b94faa | 1489 | |
b45e41d7 SW |
1490 | gfs2_assert_withdraw(sdp, rgd->rd_rg.rg_free >= *n); |
1491 | rgd->rd_rg.rg_free -= *n; | |
b3b94faa | 1492 | |
d4e9c4c3 | 1493 | gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1); |
42d52e38 | 1494 | gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); |
b3b94faa | 1495 | |
b45e41d7 | 1496 | al->al_alloced += *n; |
b3b94faa | 1497 | |
ad99f777 | 1498 | gfs2_statfs_change(sdp, 0, -(s64)*n, 0); |
b45e41d7 | 1499 | gfs2_quota_change(ip, *n, ip->i_inode.i_uid, ip->i_inode.i_gid); |
b3b94faa DT |
1500 | |
1501 | spin_lock(&sdp->sd_rindex_spin); | |
b45e41d7 | 1502 | rgd->rd_free_clone -= *n; |
b3b94faa DT |
1503 | spin_unlock(&sdp->sd_rindex_spin); |
1504 | ||
1505 | return block; | |
1506 | } | |
1507 | ||
1508 | /** | |
1509 | * gfs2_alloc_di - Allocate a dinode | |
1510 | * @dip: the directory that the inode is going in | |
1511 | * | |
1512 | * Returns: the block allocated | |
1513 | */ | |
1514 | ||
4340fe62 | 1515 | u64 gfs2_alloc_di(struct gfs2_inode *dip, u64 *generation) |
b3b94faa | 1516 | { |
feaa7bba | 1517 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
6dbd8224 | 1518 | struct gfs2_alloc *al = dip->i_alloc; |
b3b94faa | 1519 | struct gfs2_rgrpd *rgd = al->al_rgd; |
4340fe62 SW |
1520 | u32 blk; |
1521 | u64 block; | |
b45e41d7 | 1522 | unsigned int n = 1; |
b3b94faa | 1523 | |
ac576cc5 | 1524 | blk = rgblk_search(rgd, rgd->rd_last_alloc, |
b45e41d7 | 1525 | GFS2_BLKST_FREE, GFS2_BLKST_DINODE, &n); |
6eefaf61 | 1526 | BUG_ON(blk == BFITNOENT); |
b3b94faa | 1527 | |
ac576cc5 | 1528 | rgd->rd_last_alloc = blk; |
b3b94faa | 1529 | |
bb8d8a6f | 1530 | block = rgd->rd_data0 + blk; |
b3b94faa DT |
1531 | |
1532 | gfs2_assert_withdraw(sdp, rgd->rd_rg.rg_free); | |
1533 | rgd->rd_rg.rg_free--; | |
1534 | rgd->rd_rg.rg_dinodes++; | |
4340fe62 | 1535 | *generation = rgd->rd_rg.rg_igeneration++; |
d4e9c4c3 | 1536 | gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1); |
42d52e38 | 1537 | gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); |
b3b94faa DT |
1538 | |
1539 | al->al_alloced++; | |
1540 | ||
1541 | gfs2_statfs_change(sdp, 0, -1, +1); | |
5731be53 | 1542 | gfs2_trans_add_unrevoke(sdp, block, 1); |
b3b94faa DT |
1543 | |
1544 | spin_lock(&sdp->sd_rindex_spin); | |
1545 | rgd->rd_free_clone--; | |
1546 | spin_unlock(&sdp->sd_rindex_spin); | |
1547 | ||
1548 | return block; | |
1549 | } | |
1550 | ||
1551 | /** | |
1552 | * gfs2_free_data - free a contiguous run of data block(s) | |
1553 | * @ip: the inode these blocks are being freed from | |
1554 | * @bstart: first block of a run of contiguous blocks | |
1555 | * @blen: the length of the block run | |
1556 | * | |
1557 | */ | |
1558 | ||
cd915493 | 1559 | void gfs2_free_data(struct gfs2_inode *ip, u64 bstart, u32 blen) |
b3b94faa | 1560 | { |
feaa7bba | 1561 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1562 | struct gfs2_rgrpd *rgd; |
1563 | ||
1564 | rgd = rgblk_free(sdp, bstart, blen, GFS2_BLKST_FREE); | |
1565 | if (!rgd) | |
1566 | return; | |
1567 | ||
1568 | rgd->rd_rg.rg_free += blen; | |
1569 | ||
d4e9c4c3 | 1570 | gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1); |
42d52e38 | 1571 | gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); |
b3b94faa DT |
1572 | |
1573 | gfs2_trans_add_rg(rgd); | |
1574 | ||
1575 | gfs2_statfs_change(sdp, 0, +blen, 0); | |
2933f925 | 1576 | gfs2_quota_change(ip, -(s64)blen, ip->i_inode.i_uid, ip->i_inode.i_gid); |
b3b94faa DT |
1577 | } |
1578 | ||
1579 | /** | |
1580 | * gfs2_free_meta - free a contiguous run of data block(s) | |
1581 | * @ip: the inode these blocks are being freed from | |
1582 | * @bstart: first block of a run of contiguous blocks | |
1583 | * @blen: the length of the block run | |
1584 | * | |
1585 | */ | |
1586 | ||
cd915493 | 1587 | void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen) |
b3b94faa | 1588 | { |
feaa7bba | 1589 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1590 | struct gfs2_rgrpd *rgd; |
1591 | ||
1592 | rgd = rgblk_free(sdp, bstart, blen, GFS2_BLKST_FREE); | |
1593 | if (!rgd) | |
1594 | return; | |
1595 | ||
1596 | rgd->rd_rg.rg_free += blen; | |
1597 | ||
d4e9c4c3 | 1598 | gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1); |
42d52e38 | 1599 | gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); |
b3b94faa DT |
1600 | |
1601 | gfs2_trans_add_rg(rgd); | |
1602 | ||
1603 | gfs2_statfs_change(sdp, 0, +blen, 0); | |
2933f925 | 1604 | gfs2_quota_change(ip, -(s64)blen, ip->i_inode.i_uid, ip->i_inode.i_gid); |
b3b94faa DT |
1605 | gfs2_meta_wipe(ip, bstart, blen); |
1606 | } | |
1607 | ||
feaa7bba SW |
1608 | void gfs2_unlink_di(struct inode *inode) |
1609 | { | |
1610 | struct gfs2_inode *ip = GFS2_I(inode); | |
1611 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
1612 | struct gfs2_rgrpd *rgd; | |
dbb7cae2 | 1613 | u64 blkno = ip->i_no_addr; |
feaa7bba SW |
1614 | |
1615 | rgd = rgblk_free(sdp, blkno, 1, GFS2_BLKST_UNLINKED); | |
1616 | if (!rgd) | |
1617 | return; | |
1618 | gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1); | |
42d52e38 | 1619 | gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); |
feaa7bba SW |
1620 | gfs2_trans_add_rg(rgd); |
1621 | } | |
1622 | ||
cd915493 | 1623 | static void gfs2_free_uninit_di(struct gfs2_rgrpd *rgd, u64 blkno) |
b3b94faa DT |
1624 | { |
1625 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
1626 | struct gfs2_rgrpd *tmp_rgd; | |
1627 | ||
1628 | tmp_rgd = rgblk_free(sdp, blkno, 1, GFS2_BLKST_FREE); | |
1629 | if (!tmp_rgd) | |
1630 | return; | |
1631 | gfs2_assert_withdraw(sdp, rgd == tmp_rgd); | |
1632 | ||
1633 | if (!rgd->rd_rg.rg_dinodes) | |
1634 | gfs2_consist_rgrpd(rgd); | |
1635 | rgd->rd_rg.rg_dinodes--; | |
1636 | rgd->rd_rg.rg_free++; | |
1637 | ||
d4e9c4c3 | 1638 | gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1); |
42d52e38 | 1639 | gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); |
b3b94faa DT |
1640 | |
1641 | gfs2_statfs_change(sdp, 0, +1, -1); | |
1642 | gfs2_trans_add_rg(rgd); | |
1643 | } | |
1644 | ||
b3b94faa DT |
1645 | |
1646 | void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip) | |
1647 | { | |
dbb7cae2 | 1648 | gfs2_free_uninit_di(rgd, ip->i_no_addr); |
2933f925 | 1649 | gfs2_quota_change(ip, -1, ip->i_inode.i_uid, ip->i_inode.i_gid); |
dbb7cae2 | 1650 | gfs2_meta_wipe(ip, ip->i_no_addr, 1); |
b3b94faa DT |
1651 | } |
1652 | ||
1653 | /** | |
1654 | * gfs2_rlist_add - add a RG to a list of RGs | |
1655 | * @sdp: the filesystem | |
1656 | * @rlist: the list of resource groups | |
1657 | * @block: the block | |
1658 | * | |
1659 | * Figure out what RG a block belongs to and add that RG to the list | |
1660 | * | |
1661 | * FIXME: Don't use NOFAIL | |
1662 | * | |
1663 | */ | |
1664 | ||
1665 | void gfs2_rlist_add(struct gfs2_sbd *sdp, struct gfs2_rgrp_list *rlist, | |
cd915493 | 1666 | u64 block) |
b3b94faa DT |
1667 | { |
1668 | struct gfs2_rgrpd *rgd; | |
1669 | struct gfs2_rgrpd **tmp; | |
1670 | unsigned int new_space; | |
1671 | unsigned int x; | |
1672 | ||
1673 | if (gfs2_assert_warn(sdp, !rlist->rl_ghs)) | |
1674 | return; | |
1675 | ||
1676 | rgd = gfs2_blk2rgrpd(sdp, block); | |
1677 | if (!rgd) { | |
1678 | if (gfs2_consist(sdp)) | |
382066da | 1679 | fs_err(sdp, "block = %llu\n", (unsigned long long)block); |
b3b94faa DT |
1680 | return; |
1681 | } | |
1682 | ||
1683 | for (x = 0; x < rlist->rl_rgrps; x++) | |
1684 | if (rlist->rl_rgd[x] == rgd) | |
1685 | return; | |
1686 | ||
1687 | if (rlist->rl_rgrps == rlist->rl_space) { | |
1688 | new_space = rlist->rl_space + 10; | |
1689 | ||
1690 | tmp = kcalloc(new_space, sizeof(struct gfs2_rgrpd *), | |
dd894be8 | 1691 | GFP_NOFS | __GFP_NOFAIL); |
b3b94faa DT |
1692 | |
1693 | if (rlist->rl_rgd) { | |
1694 | memcpy(tmp, rlist->rl_rgd, | |
1695 | rlist->rl_space * sizeof(struct gfs2_rgrpd *)); | |
1696 | kfree(rlist->rl_rgd); | |
1697 | } | |
1698 | ||
1699 | rlist->rl_space = new_space; | |
1700 | rlist->rl_rgd = tmp; | |
1701 | } | |
1702 | ||
1703 | rlist->rl_rgd[rlist->rl_rgrps++] = rgd; | |
1704 | } | |
1705 | ||
1706 | /** | |
1707 | * gfs2_rlist_alloc - all RGs have been added to the rlist, now allocate | |
1708 | * and initialize an array of glock holders for them | |
1709 | * @rlist: the list of resource groups | |
1710 | * @state: the lock state to acquire the RG lock in | |
1711 | * @flags: the modifier flags for the holder structures | |
1712 | * | |
1713 | * FIXME: Don't use NOFAIL | |
1714 | * | |
1715 | */ | |
1716 | ||
fe6c991c | 1717 | void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist, unsigned int state) |
b3b94faa DT |
1718 | { |
1719 | unsigned int x; | |
1720 | ||
1721 | rlist->rl_ghs = kcalloc(rlist->rl_rgrps, sizeof(struct gfs2_holder), | |
dd894be8 | 1722 | GFP_NOFS | __GFP_NOFAIL); |
b3b94faa DT |
1723 | for (x = 0; x < rlist->rl_rgrps; x++) |
1724 | gfs2_holder_init(rlist->rl_rgd[x]->rd_gl, | |
fe6c991c | 1725 | state, 0, |
b3b94faa DT |
1726 | &rlist->rl_ghs[x]); |
1727 | } | |
1728 | ||
1729 | /** | |
1730 | * gfs2_rlist_free - free a resource group list | |
1731 | * @list: the list of resource groups | |
1732 | * | |
1733 | */ | |
1734 | ||
1735 | void gfs2_rlist_free(struct gfs2_rgrp_list *rlist) | |
1736 | { | |
1737 | unsigned int x; | |
1738 | ||
1739 | kfree(rlist->rl_rgd); | |
1740 | ||
1741 | if (rlist->rl_ghs) { | |
1742 | for (x = 0; x < rlist->rl_rgrps; x++) | |
1743 | gfs2_holder_uninit(&rlist->rl_ghs[x]); | |
1744 | kfree(rlist->rl_ghs); | |
1745 | } | |
1746 | } | |
1747 |