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> |
1f466a47 | 16 | #include <linux/prefetch.h> |
f15ab561 | 17 | #include <linux/blkdev.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" |
63997775 | 32 | #include "trace_gfs2.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 | ||
223b2b88 SW |
134 | /** |
135 | * gfs2_bit_search | |
136 | * @ptr: Pointer to bitmap data | |
137 | * @mask: Mask to use (normally 0x55555.... but adjusted for search start) | |
138 | * @state: The state we are searching for | |
139 | * | |
140 | * We xor the bitmap data with a patter which is the bitwise opposite | |
141 | * of what we are looking for, this gives rise to a pattern of ones | |
142 | * wherever there is a match. Since we have two bits per entry, we | |
143 | * take this pattern, shift it down by one place and then and it with | |
144 | * the original. All the even bit positions (0,2,4, etc) then represent | |
145 | * successful matches, so we mask with 0x55555..... to remove the unwanted | |
146 | * odd bit positions. | |
147 | * | |
148 | * This allows searching of a whole u64 at once (32 blocks) with a | |
149 | * single test (on 64 bit arches). | |
150 | */ | |
151 | ||
152 | static inline u64 gfs2_bit_search(const __le64 *ptr, u64 mask, u8 state) | |
153 | { | |
154 | u64 tmp; | |
155 | static const u64 search[] = { | |
075ac448 HE |
156 | [0] = 0xffffffffffffffffULL, |
157 | [1] = 0xaaaaaaaaaaaaaaaaULL, | |
158 | [2] = 0x5555555555555555ULL, | |
159 | [3] = 0x0000000000000000ULL, | |
223b2b88 SW |
160 | }; |
161 | tmp = le64_to_cpu(*ptr) ^ search[state]; | |
162 | tmp &= (tmp >> 1); | |
163 | tmp &= mask; | |
164 | return tmp; | |
165 | } | |
166 | ||
88c8ab1f SW |
167 | /** |
168 | * gfs2_bitfit - Search an rgrp's bitmap buffer to find a bit-pair representing | |
169 | * a block in a given allocation state. | |
170 | * @buffer: the buffer that holds the bitmaps | |
223b2b88 | 171 | * @len: the length (in bytes) of the buffer |
88c8ab1f | 172 | * @goal: start search at this block's bit-pair (within @buffer) |
223b2b88 | 173 | * @state: GFS2_BLKST_XXX the state of the block we're looking for. |
88c8ab1f SW |
174 | * |
175 | * Scope of @goal and returned block number is only within this bitmap buffer, | |
176 | * not entire rgrp or filesystem. @buffer will be offset from the actual | |
223b2b88 SW |
177 | * beginning of a bitmap block buffer, skipping any header structures, but |
178 | * headers are always a multiple of 64 bits long so that the buffer is | |
179 | * always aligned to a 64 bit boundary. | |
180 | * | |
181 | * The size of the buffer is in bytes, but is it assumed that it is | |
fd589a8f | 182 | * always ok to read a complete multiple of 64 bits at the end |
223b2b88 | 183 | * of the block in case the end is no aligned to a natural boundary. |
88c8ab1f SW |
184 | * |
185 | * Return: the block number (bitmap buffer scope) that was found | |
186 | */ | |
187 | ||
02ab1721 HE |
188 | static u32 gfs2_bitfit(const u8 *buf, const unsigned int len, |
189 | u32 goal, u8 state) | |
88c8ab1f | 190 | { |
223b2b88 SW |
191 | u32 spoint = (goal << 1) & ((8*sizeof(u64)) - 1); |
192 | const __le64 *ptr = ((__le64 *)buf) + (goal >> 5); | |
193 | const __le64 *end = (__le64 *)(buf + ALIGN(len, sizeof(u64))); | |
194 | u64 tmp; | |
075ac448 | 195 | u64 mask = 0x5555555555555555ULL; |
223b2b88 SW |
196 | u32 bit; |
197 | ||
198 | BUG_ON(state > 3); | |
199 | ||
200 | /* Mask off bits we don't care about at the start of the search */ | |
201 | mask <<= spoint; | |
202 | tmp = gfs2_bit_search(ptr, mask, state); | |
203 | ptr++; | |
204 | while(tmp == 0 && ptr < end) { | |
075ac448 | 205 | tmp = gfs2_bit_search(ptr, 0x5555555555555555ULL, state); |
223b2b88 | 206 | ptr++; |
1f466a47 | 207 | } |
223b2b88 SW |
208 | /* Mask off any bits which are more than len bytes from the start */ |
209 | if (ptr == end && (len & (sizeof(u64) - 1))) | |
210 | tmp &= (((u64)~0) >> (64 - 8*(len & (sizeof(u64) - 1)))); | |
211 | /* Didn't find anything, so return */ | |
212 | if (tmp == 0) | |
213 | return BFITNOENT; | |
214 | ptr--; | |
d8bd504a | 215 | bit = __ffs64(tmp); |
223b2b88 SW |
216 | bit /= 2; /* two bits per entry in the bitmap */ |
217 | return (((const unsigned char *)ptr - buf) * GFS2_NBBY) + bit; | |
88c8ab1f SW |
218 | } |
219 | ||
220 | /** | |
221 | * gfs2_bitcount - count the number of bits in a certain state | |
222 | * @buffer: the buffer that holds the bitmaps | |
223 | * @buflen: the length (in bytes) of the buffer | |
224 | * @state: the state of the block we're looking for | |
225 | * | |
226 | * Returns: The number of bits | |
227 | */ | |
228 | ||
110acf38 SW |
229 | static u32 gfs2_bitcount(struct gfs2_rgrpd *rgd, const u8 *buffer, |
230 | unsigned int buflen, u8 state) | |
88c8ab1f | 231 | { |
110acf38 SW |
232 | const u8 *byte = buffer; |
233 | const u8 *end = buffer + buflen; | |
234 | const u8 state1 = state << 2; | |
235 | const u8 state2 = state << 4; | |
236 | const u8 state3 = state << 6; | |
cd915493 | 237 | u32 count = 0; |
88c8ab1f SW |
238 | |
239 | for (; byte < end; byte++) { | |
240 | if (((*byte) & 0x03) == state) | |
241 | count++; | |
242 | if (((*byte) & 0x0C) == state1) | |
243 | count++; | |
244 | if (((*byte) & 0x30) == state2) | |
245 | count++; | |
246 | if (((*byte) & 0xC0) == state3) | |
247 | count++; | |
248 | } | |
249 | ||
250 | return count; | |
251 | } | |
252 | ||
b3b94faa DT |
253 | /** |
254 | * gfs2_rgrp_verify - Verify that a resource group is consistent | |
255 | * @sdp: the filesystem | |
256 | * @rgd: the rgrp | |
257 | * | |
258 | */ | |
259 | ||
260 | void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd) | |
261 | { | |
262 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
263 | struct gfs2_bitmap *bi = NULL; | |
bb8d8a6f | 264 | u32 length = rgd->rd_length; |
cd915493 | 265 | u32 count[4], tmp; |
b3b94faa DT |
266 | int buf, x; |
267 | ||
cd915493 | 268 | memset(count, 0, 4 * sizeof(u32)); |
b3b94faa DT |
269 | |
270 | /* Count # blocks in each of 4 possible allocation states */ | |
271 | for (buf = 0; buf < length; buf++) { | |
272 | bi = rgd->rd_bits + buf; | |
273 | for (x = 0; x < 4; x++) | |
274 | count[x] += gfs2_bitcount(rgd, | |
275 | bi->bi_bh->b_data + | |
276 | bi->bi_offset, | |
277 | bi->bi_len, x); | |
278 | } | |
279 | ||
cfc8b549 | 280 | if (count[0] != rgd->rd_free) { |
b3b94faa DT |
281 | if (gfs2_consist_rgrpd(rgd)) |
282 | fs_err(sdp, "free data mismatch: %u != %u\n", | |
cfc8b549 | 283 | count[0], rgd->rd_free); |
b3b94faa DT |
284 | return; |
285 | } | |
286 | ||
73f74948 | 287 | tmp = rgd->rd_data - rgd->rd_free - rgd->rd_dinodes; |
6b946170 | 288 | if (count[1] != tmp) { |
b3b94faa DT |
289 | if (gfs2_consist_rgrpd(rgd)) |
290 | fs_err(sdp, "used data mismatch: %u != %u\n", | |
291 | count[1], tmp); | |
292 | return; | |
293 | } | |
294 | ||
6b946170 | 295 | if (count[2] + count[3] != rgd->rd_dinodes) { |
b3b94faa | 296 | if (gfs2_consist_rgrpd(rgd)) |
feaa7bba | 297 | fs_err(sdp, "used metadata mismatch: %u != %u\n", |
6b946170 | 298 | count[2] + count[3], rgd->rd_dinodes); |
b3b94faa DT |
299 | return; |
300 | } | |
b3b94faa DT |
301 | } |
302 | ||
bb8d8a6f | 303 | static inline int rgrp_contains_block(struct gfs2_rgrpd *rgd, u64 block) |
b3b94faa | 304 | { |
bb8d8a6f SW |
305 | u64 first = rgd->rd_data0; |
306 | u64 last = first + rgd->rd_data; | |
16910427 | 307 | return first <= block && block < last; |
b3b94faa DT |
308 | } |
309 | ||
310 | /** | |
311 | * gfs2_blk2rgrpd - Find resource group for a given data/meta block number | |
312 | * @sdp: The GFS2 superblock | |
313 | * @n: The data block number | |
314 | * | |
315 | * Returns: The resource group, or NULL if not found | |
316 | */ | |
317 | ||
cd915493 | 318 | struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk) |
b3b94faa DT |
319 | { |
320 | struct gfs2_rgrpd *rgd; | |
321 | ||
322 | spin_lock(&sdp->sd_rindex_spin); | |
323 | ||
324 | list_for_each_entry(rgd, &sdp->sd_rindex_mru_list, rd_list_mru) { | |
bb8d8a6f | 325 | if (rgrp_contains_block(rgd, blk)) { |
b3b94faa DT |
326 | list_move(&rgd->rd_list_mru, &sdp->sd_rindex_mru_list); |
327 | spin_unlock(&sdp->sd_rindex_spin); | |
328 | return rgd; | |
329 | } | |
330 | } | |
331 | ||
332 | spin_unlock(&sdp->sd_rindex_spin); | |
333 | ||
334 | return NULL; | |
335 | } | |
336 | ||
337 | /** | |
338 | * gfs2_rgrpd_get_first - get the first Resource Group in the filesystem | |
339 | * @sdp: The GFS2 superblock | |
340 | * | |
341 | * Returns: The first rgrp in the filesystem | |
342 | */ | |
343 | ||
344 | struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp) | |
345 | { | |
346 | gfs2_assert(sdp, !list_empty(&sdp->sd_rindex_list)); | |
347 | return list_entry(sdp->sd_rindex_list.next, struct gfs2_rgrpd, rd_list); | |
348 | } | |
349 | ||
350 | /** | |
351 | * gfs2_rgrpd_get_next - get the next RG | |
352 | * @rgd: A RG | |
353 | * | |
354 | * Returns: The next rgrp | |
355 | */ | |
356 | ||
357 | struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd) | |
358 | { | |
359 | if (rgd->rd_list.next == &rgd->rd_sbd->sd_rindex_list) | |
360 | return NULL; | |
361 | return list_entry(rgd->rd_list.next, struct gfs2_rgrpd, rd_list); | |
362 | } | |
363 | ||
364 | static void clear_rgrpdi(struct gfs2_sbd *sdp) | |
365 | { | |
366 | struct list_head *head; | |
367 | struct gfs2_rgrpd *rgd; | |
368 | struct gfs2_glock *gl; | |
369 | ||
370 | spin_lock(&sdp->sd_rindex_spin); | |
371 | sdp->sd_rindex_forward = NULL; | |
b3b94faa DT |
372 | spin_unlock(&sdp->sd_rindex_spin); |
373 | ||
374 | head = &sdp->sd_rindex_list; | |
375 | while (!list_empty(head)) { | |
376 | rgd = list_entry(head->next, struct gfs2_rgrpd, rd_list); | |
377 | gl = rgd->rd_gl; | |
378 | ||
379 | list_del(&rgd->rd_list); | |
380 | list_del(&rgd->rd_list_mru); | |
381 | ||
382 | if (gl) { | |
5c676f6d | 383 | gl->gl_object = NULL; |
b3b94faa DT |
384 | gfs2_glock_put(gl); |
385 | } | |
386 | ||
387 | kfree(rgd->rd_bits); | |
6bdd9be6 | 388 | kmem_cache_free(gfs2_rgrpd_cachep, rgd); |
b3b94faa DT |
389 | } |
390 | } | |
391 | ||
392 | void gfs2_clear_rgrpd(struct gfs2_sbd *sdp) | |
393 | { | |
f55ab26a | 394 | mutex_lock(&sdp->sd_rindex_mutex); |
b3b94faa | 395 | clear_rgrpdi(sdp); |
f55ab26a | 396 | mutex_unlock(&sdp->sd_rindex_mutex); |
b3b94faa DT |
397 | } |
398 | ||
bb8d8a6f SW |
399 | static void gfs2_rindex_print(const struct gfs2_rgrpd *rgd) |
400 | { | |
401 | printk(KERN_INFO " ri_addr = %llu\n", (unsigned long long)rgd->rd_addr); | |
402 | printk(KERN_INFO " ri_length = %u\n", rgd->rd_length); | |
403 | printk(KERN_INFO " ri_data0 = %llu\n", (unsigned long long)rgd->rd_data0); | |
404 | printk(KERN_INFO " ri_data = %u\n", rgd->rd_data); | |
405 | printk(KERN_INFO " ri_bitbytes = %u\n", rgd->rd_bitbytes); | |
406 | } | |
407 | ||
b3b94faa DT |
408 | /** |
409 | * gfs2_compute_bitstructs - Compute the bitmap sizes | |
410 | * @rgd: The resource group descriptor | |
411 | * | |
412 | * Calculates bitmap descriptors, one for each block that contains bitmap data | |
413 | * | |
414 | * Returns: errno | |
415 | */ | |
416 | ||
417 | static int compute_bitstructs(struct gfs2_rgrpd *rgd) | |
418 | { | |
419 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
420 | struct gfs2_bitmap *bi; | |
bb8d8a6f | 421 | u32 length = rgd->rd_length; /* # blocks in hdr & bitmap */ |
cd915493 | 422 | u32 bytes_left, bytes; |
b3b94faa DT |
423 | int x; |
424 | ||
feaa7bba SW |
425 | if (!length) |
426 | return -EINVAL; | |
427 | ||
dd894be8 | 428 | rgd->rd_bits = kcalloc(length, sizeof(struct gfs2_bitmap), GFP_NOFS); |
b3b94faa DT |
429 | if (!rgd->rd_bits) |
430 | return -ENOMEM; | |
431 | ||
bb8d8a6f | 432 | bytes_left = rgd->rd_bitbytes; |
b3b94faa DT |
433 | |
434 | for (x = 0; x < length; x++) { | |
435 | bi = rgd->rd_bits + x; | |
436 | ||
60a0b8f9 | 437 | bi->bi_flags = 0; |
b3b94faa DT |
438 | /* small rgrp; bitmap stored completely in header block */ |
439 | if (length == 1) { | |
440 | bytes = bytes_left; | |
441 | bi->bi_offset = sizeof(struct gfs2_rgrp); | |
442 | bi->bi_start = 0; | |
443 | bi->bi_len = bytes; | |
444 | /* header block */ | |
445 | } else if (x == 0) { | |
446 | bytes = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_rgrp); | |
447 | bi->bi_offset = sizeof(struct gfs2_rgrp); | |
448 | bi->bi_start = 0; | |
449 | bi->bi_len = bytes; | |
450 | /* last block */ | |
451 | } else if (x + 1 == length) { | |
452 | bytes = bytes_left; | |
453 | bi->bi_offset = sizeof(struct gfs2_meta_header); | |
bb8d8a6f | 454 | bi->bi_start = rgd->rd_bitbytes - bytes_left; |
b3b94faa DT |
455 | bi->bi_len = bytes; |
456 | /* other blocks */ | |
457 | } else { | |
568f4c96 SW |
458 | bytes = sdp->sd_sb.sb_bsize - |
459 | sizeof(struct gfs2_meta_header); | |
b3b94faa | 460 | bi->bi_offset = sizeof(struct gfs2_meta_header); |
bb8d8a6f | 461 | bi->bi_start = rgd->rd_bitbytes - bytes_left; |
b3b94faa DT |
462 | bi->bi_len = bytes; |
463 | } | |
464 | ||
465 | bytes_left -= bytes; | |
466 | } | |
467 | ||
468 | if (bytes_left) { | |
469 | gfs2_consist_rgrpd(rgd); | |
470 | return -EIO; | |
471 | } | |
472 | bi = rgd->rd_bits + (length - 1); | |
bb8d8a6f | 473 | if ((bi->bi_start + bi->bi_len) * GFS2_NBBY != rgd->rd_data) { |
b3b94faa | 474 | if (gfs2_consist_rgrpd(rgd)) { |
bb8d8a6f | 475 | gfs2_rindex_print(rgd); |
b3b94faa DT |
476 | fs_err(sdp, "start=%u len=%u offset=%u\n", |
477 | bi->bi_start, bi->bi_len, bi->bi_offset); | |
478 | } | |
479 | return -EIO; | |
480 | } | |
481 | ||
482 | return 0; | |
483 | } | |
484 | ||
7ae8fa84 RP |
485 | /** |
486 | * gfs2_ri_total - Total up the file system space, according to the rindex. | |
487 | * | |
488 | */ | |
489 | u64 gfs2_ri_total(struct gfs2_sbd *sdp) | |
490 | { | |
491 | u64 total_data = 0; | |
492 | struct inode *inode = sdp->sd_rindex; | |
493 | struct gfs2_inode *ip = GFS2_I(inode); | |
7ae8fa84 RP |
494 | char buf[sizeof(struct gfs2_rindex)]; |
495 | struct file_ra_state ra_state; | |
496 | int error, rgrps; | |
497 | ||
498 | mutex_lock(&sdp->sd_rindex_mutex); | |
499 | file_ra_state_init(&ra_state, inode->i_mapping); | |
500 | for (rgrps = 0;; rgrps++) { | |
501 | loff_t pos = rgrps * sizeof(struct gfs2_rindex); | |
502 | ||
bcd7278d | 503 | if (pos + sizeof(struct gfs2_rindex) > i_size_read(inode)) |
7ae8fa84 RP |
504 | break; |
505 | error = gfs2_internal_read(ip, &ra_state, buf, &pos, | |
506 | sizeof(struct gfs2_rindex)); | |
507 | if (error != sizeof(struct gfs2_rindex)) | |
508 | break; | |
bb8d8a6f | 509 | total_data += be32_to_cpu(((struct gfs2_rindex *)buf)->ri_data); |
7ae8fa84 RP |
510 | } |
511 | mutex_unlock(&sdp->sd_rindex_mutex); | |
512 | return total_data; | |
513 | } | |
514 | ||
bb8d8a6f SW |
515 | static void gfs2_rindex_in(struct gfs2_rgrpd *rgd, const void *buf) |
516 | { | |
517 | const struct gfs2_rindex *str = buf; | |
518 | ||
519 | rgd->rd_addr = be64_to_cpu(str->ri_addr); | |
520 | rgd->rd_length = be32_to_cpu(str->ri_length); | |
521 | rgd->rd_data0 = be64_to_cpu(str->ri_data0); | |
522 | rgd->rd_data = be32_to_cpu(str->ri_data); | |
523 | rgd->rd_bitbytes = be32_to_cpu(str->ri_bitbytes); | |
524 | } | |
525 | ||
b3b94faa | 526 | /** |
6c53267f | 527 | * read_rindex_entry - Pull in a new resource index entry from the disk |
b3b94faa DT |
528 | * @gl: The glock covering the rindex inode |
529 | * | |
6c53267f RP |
530 | * Returns: 0 on success, error code otherwise |
531 | */ | |
532 | ||
533 | static int read_rindex_entry(struct gfs2_inode *ip, | |
534 | struct file_ra_state *ra_state) | |
535 | { | |
536 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
537 | loff_t pos = sdp->sd_rgrps * sizeof(struct gfs2_rindex); | |
538 | char buf[sizeof(struct gfs2_rindex)]; | |
539 | int error; | |
540 | struct gfs2_rgrpd *rgd; | |
541 | ||
542 | error = gfs2_internal_read(ip, ra_state, buf, &pos, | |
543 | sizeof(struct gfs2_rindex)); | |
544 | if (!error) | |
545 | return 0; | |
546 | if (error != sizeof(struct gfs2_rindex)) { | |
547 | if (error > 0) | |
548 | error = -EIO; | |
549 | return error; | |
550 | } | |
551 | ||
6bdd9be6 | 552 | rgd = kmem_cache_zalloc(gfs2_rgrpd_cachep, GFP_NOFS); |
6c53267f RP |
553 | error = -ENOMEM; |
554 | if (!rgd) | |
555 | return error; | |
556 | ||
557 | mutex_init(&rgd->rd_mutex); | |
558 | lops_init_le(&rgd->rd_le, &gfs2_rg_lops); | |
559 | rgd->rd_sbd = sdp; | |
560 | ||
561 | list_add_tail(&rgd->rd_list, &sdp->sd_rindex_list); | |
562 | list_add_tail(&rgd->rd_list_mru, &sdp->sd_rindex_mru_list); | |
563 | ||
bb8d8a6f | 564 | gfs2_rindex_in(rgd, buf); |
6c53267f RP |
565 | error = compute_bitstructs(rgd); |
566 | if (error) | |
567 | return error; | |
568 | ||
bb8d8a6f | 569 | error = gfs2_glock_get(sdp, rgd->rd_addr, |
6c53267f RP |
570 | &gfs2_rgrp_glops, CREATE, &rgd->rd_gl); |
571 | if (error) | |
572 | return error; | |
573 | ||
574 | rgd->rd_gl->gl_object = rgd; | |
cf45b752 | 575 | rgd->rd_flags &= ~GFS2_RDF_UPTODATE; |
6c53267f RP |
576 | return error; |
577 | } | |
578 | ||
579 | /** | |
580 | * gfs2_ri_update - Pull in a new resource index from the disk | |
581 | * @ip: pointer to the rindex inode | |
582 | * | |
b3b94faa DT |
583 | * Returns: 0 on successful update, error code otherwise |
584 | */ | |
585 | ||
086d8334 | 586 | int gfs2_ri_update(struct gfs2_inode *ip) |
b3b94faa | 587 | { |
feaa7bba SW |
588 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
589 | struct inode *inode = &ip->i_inode; | |
f42faf4f | 590 | struct file_ra_state ra_state; |
a2e0f799 | 591 | u64 rgrp_count = i_size_read(inode); |
3921120e BM |
592 | struct gfs2_rgrpd *rgd; |
593 | unsigned int max_data = 0; | |
b3b94faa DT |
594 | int error; |
595 | ||
7fe3ec6f | 596 | do_div(rgrp_count, sizeof(struct gfs2_rindex)); |
b3b94faa DT |
597 | clear_rgrpdi(sdp); |
598 | ||
f42faf4f | 599 | file_ra_state_init(&ra_state, inode->i_mapping); |
cd81a4ba | 600 | for (sdp->sd_rgrps = 0; sdp->sd_rgrps < rgrp_count; sdp->sd_rgrps++) { |
6c53267f RP |
601 | error = read_rindex_entry(ip, &ra_state); |
602 | if (error) { | |
603 | clear_rgrpdi(sdp); | |
604 | return error; | |
b3b94faa | 605 | } |
6c53267f | 606 | } |
b3b94faa | 607 | |
3921120e BM |
608 | list_for_each_entry(rgd, &sdp->sd_rindex_list, rd_list) |
609 | if (rgd->rd_data > max_data) | |
610 | max_data = rgd->rd_data; | |
611 | sdp->sd_max_rg_data = max_data; | |
cf45b752 | 612 | sdp->sd_rindex_uptodate = 1; |
6c53267f RP |
613 | return 0; |
614 | } | |
b3b94faa | 615 | |
b3b94faa DT |
616 | /** |
617 | * gfs2_rindex_hold - Grab a lock on the rindex | |
618 | * @sdp: The GFS2 superblock | |
619 | * @ri_gh: the glock holder | |
620 | * | |
621 | * We grab a lock on the rindex inode to make sure that it doesn't | |
622 | * change whilst we are performing an operation. We keep this lock | |
623 | * for quite long periods of time compared to other locks. This | |
624 | * doesn't matter, since it is shared and it is very, very rarely | |
625 | * accessed in the exclusive mode (i.e. only when expanding the filesystem). | |
626 | * | |
627 | * This makes sure that we're using the latest copy of the resource index | |
628 | * special file, which might have been updated if someone expanded the | |
629 | * filesystem (via gfs2_grow utility), which adds new resource groups. | |
630 | * | |
631 | * Returns: 0 on success, error code otherwise | |
632 | */ | |
633 | ||
634 | int gfs2_rindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ri_gh) | |
635 | { | |
feaa7bba | 636 | struct gfs2_inode *ip = GFS2_I(sdp->sd_rindex); |
b3b94faa DT |
637 | struct gfs2_glock *gl = ip->i_gl; |
638 | int error; | |
639 | ||
640 | error = gfs2_glock_nq_init(gl, LM_ST_SHARED, 0, ri_gh); | |
641 | if (error) | |
642 | return error; | |
643 | ||
644 | /* Read new copy from disk if we don't have the latest */ | |
cf45b752 | 645 | if (!sdp->sd_rindex_uptodate) { |
f55ab26a | 646 | mutex_lock(&sdp->sd_rindex_mutex); |
cf45b752 | 647 | if (!sdp->sd_rindex_uptodate) { |
b3b94faa DT |
648 | error = gfs2_ri_update(ip); |
649 | if (error) | |
650 | gfs2_glock_dq_uninit(ri_gh); | |
651 | } | |
f55ab26a | 652 | mutex_unlock(&sdp->sd_rindex_mutex); |
b3b94faa DT |
653 | } |
654 | ||
655 | return error; | |
656 | } | |
657 | ||
42d52e38 | 658 | static void gfs2_rgrp_in(struct gfs2_rgrpd *rgd, const void *buf) |
bb8d8a6f SW |
659 | { |
660 | const struct gfs2_rgrp *str = buf; | |
42d52e38 | 661 | u32 rg_flags; |
bb8d8a6f | 662 | |
42d52e38 | 663 | rg_flags = be32_to_cpu(str->rg_flags); |
09010978 | 664 | rg_flags &= ~GFS2_RDF_MASK; |
1ce97e56 SW |
665 | rgd->rd_flags &= GFS2_RDF_MASK; |
666 | rgd->rd_flags |= rg_flags; | |
cfc8b549 | 667 | rgd->rd_free = be32_to_cpu(str->rg_free); |
73f74948 | 668 | rgd->rd_dinodes = be32_to_cpu(str->rg_dinodes); |
d8b71f73 | 669 | rgd->rd_igeneration = be64_to_cpu(str->rg_igeneration); |
bb8d8a6f SW |
670 | } |
671 | ||
42d52e38 | 672 | static void gfs2_rgrp_out(struct gfs2_rgrpd *rgd, void *buf) |
bb8d8a6f SW |
673 | { |
674 | struct gfs2_rgrp *str = buf; | |
675 | ||
09010978 | 676 | str->rg_flags = cpu_to_be32(rgd->rd_flags & ~GFS2_RDF_MASK); |
cfc8b549 | 677 | str->rg_free = cpu_to_be32(rgd->rd_free); |
73f74948 | 678 | str->rg_dinodes = cpu_to_be32(rgd->rd_dinodes); |
bb8d8a6f | 679 | str->__pad = cpu_to_be32(0); |
d8b71f73 | 680 | str->rg_igeneration = cpu_to_be64(rgd->rd_igeneration); |
bb8d8a6f SW |
681 | memset(&str->rg_reserved, 0, sizeof(str->rg_reserved)); |
682 | } | |
683 | ||
b3b94faa DT |
684 | /** |
685 | * gfs2_rgrp_bh_get - Read in a RG's header and bitmaps | |
686 | * @rgd: the struct gfs2_rgrpd describing the RG to read in | |
687 | * | |
688 | * Read in all of a Resource Group's header and bitmap blocks. | |
689 | * Caller must eventually call gfs2_rgrp_relse() to free the bitmaps. | |
690 | * | |
691 | * Returns: errno | |
692 | */ | |
693 | ||
694 | int gfs2_rgrp_bh_get(struct gfs2_rgrpd *rgd) | |
695 | { | |
696 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
697 | struct gfs2_glock *gl = rgd->rd_gl; | |
bb8d8a6f | 698 | unsigned int length = rgd->rd_length; |
b3b94faa DT |
699 | struct gfs2_bitmap *bi; |
700 | unsigned int x, y; | |
701 | int error; | |
702 | ||
f55ab26a | 703 | mutex_lock(&rgd->rd_mutex); |
b3b94faa DT |
704 | |
705 | spin_lock(&sdp->sd_rindex_spin); | |
706 | if (rgd->rd_bh_count) { | |
707 | rgd->rd_bh_count++; | |
708 | spin_unlock(&sdp->sd_rindex_spin); | |
f55ab26a | 709 | mutex_unlock(&rgd->rd_mutex); |
b3b94faa DT |
710 | return 0; |
711 | } | |
712 | spin_unlock(&sdp->sd_rindex_spin); | |
713 | ||
714 | for (x = 0; x < length; x++) { | |
715 | bi = rgd->rd_bits + x; | |
bb8d8a6f | 716 | error = gfs2_meta_read(gl, rgd->rd_addr + x, 0, &bi->bi_bh); |
b3b94faa DT |
717 | if (error) |
718 | goto fail; | |
719 | } | |
720 | ||
721 | for (y = length; y--;) { | |
722 | bi = rgd->rd_bits + y; | |
7276b3b0 | 723 | error = gfs2_meta_wait(sdp, bi->bi_bh); |
b3b94faa DT |
724 | if (error) |
725 | goto fail; | |
feaa7bba | 726 | if (gfs2_metatype_check(sdp, bi->bi_bh, y ? GFS2_METATYPE_RB : |
b3b94faa DT |
727 | GFS2_METATYPE_RG)) { |
728 | error = -EIO; | |
729 | goto fail; | |
730 | } | |
731 | } | |
732 | ||
cf45b752 | 733 | if (!(rgd->rd_flags & GFS2_RDF_UPTODATE)) { |
60a0b8f9 SW |
734 | for (x = 0; x < length; x++) |
735 | clear_bit(GBF_FULL, &rgd->rd_bits[x].bi_flags); | |
42d52e38 | 736 | gfs2_rgrp_in(rgd, (rgd->rd_bits[0].bi_bh)->b_data); |
1ce97e56 | 737 | rgd->rd_flags |= (GFS2_RDF_UPTODATE | GFS2_RDF_CHECK); |
b3b94faa DT |
738 | } |
739 | ||
740 | spin_lock(&sdp->sd_rindex_spin); | |
cfc8b549 | 741 | rgd->rd_free_clone = rgd->rd_free; |
b3b94faa DT |
742 | rgd->rd_bh_count++; |
743 | spin_unlock(&sdp->sd_rindex_spin); | |
744 | ||
f55ab26a | 745 | mutex_unlock(&rgd->rd_mutex); |
b3b94faa DT |
746 | |
747 | return 0; | |
748 | ||
feaa7bba | 749 | fail: |
b3b94faa DT |
750 | while (x--) { |
751 | bi = rgd->rd_bits + x; | |
752 | brelse(bi->bi_bh); | |
753 | bi->bi_bh = NULL; | |
754 | gfs2_assert_warn(sdp, !bi->bi_clone); | |
755 | } | |
f55ab26a | 756 | mutex_unlock(&rgd->rd_mutex); |
b3b94faa DT |
757 | |
758 | return error; | |
759 | } | |
760 | ||
761 | void gfs2_rgrp_bh_hold(struct gfs2_rgrpd *rgd) | |
762 | { | |
763 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
764 | ||
765 | spin_lock(&sdp->sd_rindex_spin); | |
766 | gfs2_assert_warn(rgd->rd_sbd, rgd->rd_bh_count); | |
767 | rgd->rd_bh_count++; | |
768 | spin_unlock(&sdp->sd_rindex_spin); | |
769 | } | |
770 | ||
771 | /** | |
772 | * gfs2_rgrp_bh_put - Release RG bitmaps read in with gfs2_rgrp_bh_get() | |
773 | * @rgd: the struct gfs2_rgrpd describing the RG to read in | |
774 | * | |
775 | */ | |
776 | ||
777 | void gfs2_rgrp_bh_put(struct gfs2_rgrpd *rgd) | |
778 | { | |
779 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
bb8d8a6f | 780 | int x, length = rgd->rd_length; |
b3b94faa DT |
781 | |
782 | spin_lock(&sdp->sd_rindex_spin); | |
783 | gfs2_assert_warn(rgd->rd_sbd, rgd->rd_bh_count); | |
784 | if (--rgd->rd_bh_count) { | |
785 | spin_unlock(&sdp->sd_rindex_spin); | |
786 | return; | |
787 | } | |
788 | ||
789 | for (x = 0; x < length; x++) { | |
790 | struct gfs2_bitmap *bi = rgd->rd_bits + x; | |
791 | kfree(bi->bi_clone); | |
792 | bi->bi_clone = NULL; | |
793 | brelse(bi->bi_bh); | |
794 | bi->bi_bh = NULL; | |
795 | } | |
796 | ||
797 | spin_unlock(&sdp->sd_rindex_spin); | |
798 | } | |
799 | ||
f15ab561 SW |
800 | static void gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset, |
801 | const struct gfs2_bitmap *bi) | |
802 | { | |
803 | struct super_block *sb = sdp->sd_vfs; | |
804 | struct block_device *bdev = sb->s_bdev; | |
805 | const unsigned int sects_per_blk = sdp->sd_sb.sb_bsize / | |
e1defc4f | 806 | bdev_logical_block_size(sb->s_bdev); |
f15ab561 | 807 | u64 blk; |
64d576ba | 808 | sector_t start = 0; |
f15ab561 SW |
809 | sector_t nr_sects = 0; |
810 | int rv; | |
811 | unsigned int x; | |
812 | ||
813 | for (x = 0; x < bi->bi_len; x++) { | |
814 | const u8 *orig = bi->bi_bh->b_data + bi->bi_offset + x; | |
815 | const u8 *clone = bi->bi_clone + bi->bi_offset + x; | |
816 | u8 diff = ~(*orig | (*orig >> 1)) & (*clone | (*clone >> 1)); | |
817 | diff &= 0x55; | |
818 | if (diff == 0) | |
819 | continue; | |
820 | blk = offset + ((bi->bi_start + x) * GFS2_NBBY); | |
821 | blk *= sects_per_blk; /* convert to sectors */ | |
822 | while(diff) { | |
823 | if (diff & 1) { | |
824 | if (nr_sects == 0) | |
825 | goto start_new_extent; | |
826 | if ((start + nr_sects) != blk) { | |
827 | rv = blkdev_issue_discard(bdev, start, | |
746cd1e7 | 828 | nr_sects, GFP_NOFS, |
dd3932ed | 829 | 0); |
f15ab561 SW |
830 | if (rv) |
831 | goto fail; | |
832 | nr_sects = 0; | |
833 | start_new_extent: | |
834 | start = blk; | |
835 | } | |
836 | nr_sects += sects_per_blk; | |
837 | } | |
838 | diff >>= 2; | |
839 | blk += sects_per_blk; | |
840 | } | |
841 | } | |
842 | if (nr_sects) { | |
dd3932ed | 843 | rv = blkdev_issue_discard(bdev, start, nr_sects, GFP_NOFS, 0); |
f15ab561 SW |
844 | if (rv) |
845 | goto fail; | |
846 | } | |
847 | return; | |
848 | fail: | |
849 | fs_warn(sdp, "error %d on discard request, turning discards off for this filesystem", rv); | |
850 | sdp->sd_args.ar_discard = 0; | |
851 | } | |
852 | ||
b3b94faa DT |
853 | void gfs2_rgrp_repolish_clones(struct gfs2_rgrpd *rgd) |
854 | { | |
855 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
bb8d8a6f | 856 | unsigned int length = rgd->rd_length; |
b3b94faa DT |
857 | unsigned int x; |
858 | ||
859 | for (x = 0; x < length; x++) { | |
860 | struct gfs2_bitmap *bi = rgd->rd_bits + x; | |
861 | if (!bi->bi_clone) | |
862 | continue; | |
f15ab561 SW |
863 | if (sdp->sd_args.ar_discard) |
864 | gfs2_rgrp_send_discards(sdp, rgd->rd_data0, bi); | |
60a0b8f9 | 865 | clear_bit(GBF_FULL, &bi->bi_flags); |
b3b94faa | 866 | memcpy(bi->bi_clone + bi->bi_offset, |
feaa7bba | 867 | bi->bi_bh->b_data + bi->bi_offset, bi->bi_len); |
b3b94faa DT |
868 | } |
869 | ||
870 | spin_lock(&sdp->sd_rindex_spin); | |
cfc8b549 | 871 | rgd->rd_free_clone = rgd->rd_free; |
b3b94faa DT |
872 | spin_unlock(&sdp->sd_rindex_spin); |
873 | } | |
874 | ||
875 | /** | |
876 | * gfs2_alloc_get - get the struct gfs2_alloc structure for an inode | |
877 | * @ip: the incore GFS2 inode structure | |
878 | * | |
879 | * Returns: the struct gfs2_alloc | |
880 | */ | |
881 | ||
882 | struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip) | |
883 | { | |
6dbd8224 | 884 | BUG_ON(ip->i_alloc != NULL); |
ea8d62da | 885 | ip->i_alloc = kzalloc(sizeof(struct gfs2_alloc), GFP_NOFS); |
6dbd8224 | 886 | return ip->i_alloc; |
b3b94faa DT |
887 | } |
888 | ||
b3b94faa DT |
889 | /** |
890 | * try_rgrp_fit - See if a given reservation will fit in a given RG | |
891 | * @rgd: the RG data | |
892 | * @al: the struct gfs2_alloc structure describing the reservation | |
893 | * | |
894 | * If there's room for the requested blocks to be allocated from the RG: | |
b3b94faa DT |
895 | * Sets the $al_rgd field in @al. |
896 | * | |
897 | * Returns: 1 on success (it fits), 0 on failure (it doesn't fit) | |
898 | */ | |
899 | ||
900 | static int try_rgrp_fit(struct gfs2_rgrpd *rgd, struct gfs2_alloc *al) | |
901 | { | |
902 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
903 | int ret = 0; | |
904 | ||
09010978 | 905 | if (rgd->rd_flags & (GFS2_RGF_NOALLOC | GFS2_RDF_ERROR)) |
a43a4906 SW |
906 | return 0; |
907 | ||
b3b94faa DT |
908 | spin_lock(&sdp->sd_rindex_spin); |
909 | if (rgd->rd_free_clone >= al->al_requested) { | |
910 | al->al_rgd = rgd; | |
911 | ret = 1; | |
912 | } | |
913 | spin_unlock(&sdp->sd_rindex_spin); | |
914 | ||
915 | return ret; | |
916 | } | |
917 | ||
c8cdf479 SW |
918 | /** |
919 | * try_rgrp_unlink - Look for any unlinked, allocated, but unused inodes | |
920 | * @rgd: The rgrp | |
921 | * | |
1a0eae88 BP |
922 | * Returns: 0 if no error |
923 | * The inode, if one has been found, in inode. | |
c8cdf479 SW |
924 | */ |
925 | ||
044b9414 | 926 | static void try_rgrp_unlink(struct gfs2_rgrpd *rgd, u64 *last_unlinked, u64 skip) |
c8cdf479 | 927 | { |
6760bdcd | 928 | u32 goal = 0, block; |
bb9bcf06 | 929 | u64 no_addr; |
5f3eae75 | 930 | struct gfs2_sbd *sdp = rgd->rd_sbd; |
b45e41d7 | 931 | unsigned int n; |
044b9414 SW |
932 | struct gfs2_glock *gl; |
933 | struct gfs2_inode *ip; | |
934 | int error; | |
935 | int found = 0; | |
c8cdf479 | 936 | |
044b9414 | 937 | while (goal < rgd->rd_data) { |
5f3eae75 | 938 | down_write(&sdp->sd_log_flush_lock); |
b45e41d7 | 939 | n = 1; |
6760bdcd | 940 | block = rgblk_search(rgd, goal, GFS2_BLKST_UNLINKED, |
b45e41d7 | 941 | GFS2_BLKST_UNLINKED, &n); |
5f3eae75 | 942 | up_write(&sdp->sd_log_flush_lock); |
6760bdcd | 943 | if (block == BFITNOENT) |
24c73873 | 944 | break; |
6760bdcd BP |
945 | /* rgblk_search can return a block < goal, so we need to |
946 | keep it marching forward. */ | |
947 | no_addr = block + rgd->rd_data0; | |
44ad37d6 | 948 | goal = max(block + 1, goal + 1); |
6760bdcd | 949 | if (*last_unlinked != NO_BLOCK && no_addr <= *last_unlinked) |
c8cdf479 | 950 | continue; |
1e19a195 SW |
951 | if (no_addr == skip) |
952 | continue; | |
bb9bcf06 | 953 | *last_unlinked = no_addr; |
044b9414 SW |
954 | |
955 | error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &gl); | |
956 | if (error) | |
957 | continue; | |
958 | ||
959 | /* If the inode is already in cache, we can ignore it here | |
960 | * because the existing inode disposal code will deal with | |
961 | * it when all refs have gone away. Accessing gl_object like | |
962 | * this is not safe in general. Here it is ok because we do | |
963 | * not dereference the pointer, and we only need an approx | |
964 | * answer to whether it is NULL or not. | |
965 | */ | |
966 | ip = gl->gl_object; | |
967 | ||
968 | if (ip || queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0) | |
969 | gfs2_glock_put(gl); | |
970 | else | |
971 | found++; | |
972 | ||
973 | /* Limit reclaim to sensible number of tasks */ | |
44ad37d6 | 974 | if (found > NR_CPUS) |
044b9414 | 975 | return; |
c8cdf479 SW |
976 | } |
977 | ||
978 | rgd->rd_flags &= ~GFS2_RDF_CHECK; | |
044b9414 | 979 | return; |
c8cdf479 SW |
980 | } |
981 | ||
b3b94faa DT |
982 | /** |
983 | * recent_rgrp_next - get next RG from "recent" list | |
984 | * @cur_rgd: current rgrp | |
b3b94faa DT |
985 | * |
986 | * Returns: The next rgrp in the recent list | |
987 | */ | |
988 | ||
9cabcdbd | 989 | static struct gfs2_rgrpd *recent_rgrp_next(struct gfs2_rgrpd *cur_rgd) |
b3b94faa DT |
990 | { |
991 | struct gfs2_sbd *sdp = cur_rgd->rd_sbd; | |
992 | struct list_head *head; | |
993 | struct gfs2_rgrpd *rgd; | |
994 | ||
995 | spin_lock(&sdp->sd_rindex_spin); | |
9cabcdbd SW |
996 | head = &sdp->sd_rindex_mru_list; |
997 | if (unlikely(cur_rgd->rd_list_mru.next == head)) { | |
998 | spin_unlock(&sdp->sd_rindex_spin); | |
999 | return NULL; | |
b3b94faa | 1000 | } |
9cabcdbd | 1001 | rgd = list_entry(cur_rgd->rd_list_mru.next, struct gfs2_rgrpd, rd_list_mru); |
b3b94faa | 1002 | spin_unlock(&sdp->sd_rindex_spin); |
b3b94faa DT |
1003 | return rgd; |
1004 | } | |
1005 | ||
b3b94faa DT |
1006 | /** |
1007 | * forward_rgrp_get - get an rgrp to try next from full list | |
1008 | * @sdp: The GFS2 superblock | |
1009 | * | |
1010 | * Returns: The rgrp to try next | |
1011 | */ | |
1012 | ||
1013 | static struct gfs2_rgrpd *forward_rgrp_get(struct gfs2_sbd *sdp) | |
1014 | { | |
1015 | struct gfs2_rgrpd *rgd; | |
1016 | unsigned int journals = gfs2_jindex_size(sdp); | |
1017 | unsigned int rg = 0, x; | |
1018 | ||
1019 | spin_lock(&sdp->sd_rindex_spin); | |
1020 | ||
1021 | rgd = sdp->sd_rindex_forward; | |
1022 | if (!rgd) { | |
1023 | if (sdp->sd_rgrps >= journals) | |
1024 | rg = sdp->sd_rgrps * sdp->sd_jdesc->jd_jid / journals; | |
1025 | ||
b8e1aabf | 1026 | for (x = 0, rgd = gfs2_rgrpd_get_first(sdp); x < rg; |
b3b94faa DT |
1027 | x++, rgd = gfs2_rgrpd_get_next(rgd)) |
1028 | /* Do Nothing */; | |
1029 | ||
1030 | sdp->sd_rindex_forward = rgd; | |
1031 | } | |
1032 | ||
1033 | spin_unlock(&sdp->sd_rindex_spin); | |
1034 | ||
1035 | return rgd; | |
1036 | } | |
1037 | ||
1038 | /** | |
1039 | * forward_rgrp_set - set the forward rgrp pointer | |
1040 | * @sdp: the filesystem | |
1041 | * @rgd: The new forward rgrp | |
1042 | * | |
1043 | */ | |
1044 | ||
1045 | static void forward_rgrp_set(struct gfs2_sbd *sdp, struct gfs2_rgrpd *rgd) | |
1046 | { | |
1047 | spin_lock(&sdp->sd_rindex_spin); | |
1048 | sdp->sd_rindex_forward = rgd; | |
1049 | spin_unlock(&sdp->sd_rindex_spin); | |
1050 | } | |
1051 | ||
1052 | /** | |
1053 | * get_local_rgrp - Choose and lock a rgrp for allocation | |
1054 | * @ip: the inode to reserve space for | |
1055 | * @rgp: the chosen and locked rgrp | |
1056 | * | |
1057 | * Try to acquire rgrp in way which avoids contending with others. | |
1058 | * | |
1059 | * Returns: errno | |
1060 | */ | |
1061 | ||
044b9414 | 1062 | static int get_local_rgrp(struct gfs2_inode *ip, u64 *last_unlinked) |
b3b94faa | 1063 | { |
feaa7bba | 1064 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 1065 | struct gfs2_rgrpd *rgd, *begin = NULL; |
6dbd8224 | 1066 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
1067 | int flags = LM_FLAG_TRY; |
1068 | int skipped = 0; | |
1069 | int loops = 0; | |
292c8c14 | 1070 | int error, rg_locked; |
b3b94faa | 1071 | |
9cabcdbd | 1072 | rgd = gfs2_blk2rgrpd(sdp, ip->i_goal); |
b3b94faa DT |
1073 | |
1074 | while (rgd) { | |
292c8c14 AD |
1075 | rg_locked = 0; |
1076 | ||
1077 | if (gfs2_glock_is_locked_by_me(rgd->rd_gl)) { | |
1078 | rg_locked = 1; | |
1079 | error = 0; | |
1080 | } else { | |
1081 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, | |
1082 | LM_FLAG_TRY, &al->al_rgd_gh); | |
1083 | } | |
b3b94faa DT |
1084 | switch (error) { |
1085 | case 0: | |
1086 | if (try_rgrp_fit(rgd, al)) | |
1087 | goto out; | |
044b9414 SW |
1088 | if (rgd->rd_flags & GFS2_RDF_CHECK) |
1089 | try_rgrp_unlink(rgd, last_unlinked, ip->i_no_addr); | |
292c8c14 AD |
1090 | if (!rg_locked) |
1091 | gfs2_glock_dq_uninit(&al->al_rgd_gh); | |
9cabcdbd | 1092 | /* fall through */ |
b3b94faa | 1093 | case GLR_TRYFAILED: |
9cabcdbd | 1094 | rgd = recent_rgrp_next(rgd); |
b3b94faa DT |
1095 | break; |
1096 | ||
1097 | default: | |
cc0581bd | 1098 | return error; |
b3b94faa DT |
1099 | } |
1100 | } | |
1101 | ||
1102 | /* Go through full list of rgrps */ | |
1103 | ||
1104 | begin = rgd = forward_rgrp_get(sdp); | |
1105 | ||
1106 | for (;;) { | |
292c8c14 AD |
1107 | rg_locked = 0; |
1108 | ||
1109 | if (gfs2_glock_is_locked_by_me(rgd->rd_gl)) { | |
1110 | rg_locked = 1; | |
1111 | error = 0; | |
1112 | } else { | |
1113 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, flags, | |
1114 | &al->al_rgd_gh); | |
1115 | } | |
b3b94faa DT |
1116 | switch (error) { |
1117 | case 0: | |
1118 | if (try_rgrp_fit(rgd, al)) | |
1119 | goto out; | |
044b9414 SW |
1120 | if (rgd->rd_flags & GFS2_RDF_CHECK) |
1121 | try_rgrp_unlink(rgd, last_unlinked, ip->i_no_addr); | |
292c8c14 AD |
1122 | if (!rg_locked) |
1123 | gfs2_glock_dq_uninit(&al->al_rgd_gh); | |
b3b94faa DT |
1124 | break; |
1125 | ||
1126 | case GLR_TRYFAILED: | |
1127 | skipped++; | |
1128 | break; | |
1129 | ||
1130 | default: | |
cc0581bd | 1131 | return error; |
b3b94faa DT |
1132 | } |
1133 | ||
1134 | rgd = gfs2_rgrpd_get_next(rgd); | |
1135 | if (!rgd) | |
1136 | rgd = gfs2_rgrpd_get_first(sdp); | |
1137 | ||
1138 | if (rgd == begin) { | |
172e045a | 1139 | if (++loops >= 3) |
cc0581bd | 1140 | return -ENOSPC; |
172e045a BM |
1141 | if (!skipped) |
1142 | loops++; | |
b3b94faa | 1143 | flags = 0; |
172e045a BM |
1144 | if (loops == 2) |
1145 | gfs2_log_flush(sdp, NULL); | |
b3b94faa DT |
1146 | } |
1147 | } | |
1148 | ||
feaa7bba | 1149 | out: |
b3b94faa | 1150 | if (begin) { |
9cabcdbd SW |
1151 | spin_lock(&sdp->sd_rindex_spin); |
1152 | list_move(&rgd->rd_list_mru, &sdp->sd_rindex_mru_list); | |
1153 | spin_unlock(&sdp->sd_rindex_spin); | |
b3b94faa DT |
1154 | rgd = gfs2_rgrpd_get_next(rgd); |
1155 | if (!rgd) | |
1156 | rgd = gfs2_rgrpd_get_first(sdp); | |
1157 | forward_rgrp_set(sdp, rgd); | |
1158 | } | |
1159 | ||
cc0581bd | 1160 | return 0; |
b3b94faa DT |
1161 | } |
1162 | ||
1163 | /** | |
1164 | * gfs2_inplace_reserve_i - Reserve space in the filesystem | |
1165 | * @ip: the inode to reserve space for | |
1166 | * | |
1167 | * Returns: errno | |
1168 | */ | |
1169 | ||
46290341 BP |
1170 | int gfs2_inplace_reserve_i(struct gfs2_inode *ip, int hold_rindex, |
1171 | char *file, unsigned int line) | |
b3b94faa | 1172 | { |
feaa7bba | 1173 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 1174 | struct gfs2_alloc *al = ip->i_alloc; |
7ae8fa84 | 1175 | int error = 0; |
044b9414 SW |
1176 | u64 last_unlinked = NO_BLOCK; |
1177 | int tries = 0; | |
b3b94faa DT |
1178 | |
1179 | if (gfs2_assert_warn(sdp, al->al_requested)) | |
1180 | return -EINVAL; | |
1181 | ||
46290341 BP |
1182 | if (hold_rindex) { |
1183 | /* We need to hold the rindex unless the inode we're using is | |
1184 | the rindex itself, in which case it's already held. */ | |
1185 | if (ip != GFS2_I(sdp->sd_rindex)) | |
1186 | error = gfs2_rindex_hold(sdp, &al->al_ri_gh); | |
1187 | else if (!sdp->sd_rgrps) /* We may not have the rindex read | |
1188 | in, so: */ | |
0489b3f5 | 1189 | error = gfs2_ri_update(ip); |
044b9414 SW |
1190 | if (error) |
1191 | return error; | |
46290341 | 1192 | } |
7ae8fa84 | 1193 | |
0489b3f5 | 1194 | try_again: |
044b9414 SW |
1195 | do { |
1196 | error = get_local_rgrp(ip, &last_unlinked); | |
1197 | /* If there is no space, flushing the log may release some */ | |
0489b3f5 BM |
1198 | if (error) { |
1199 | if (ip == GFS2_I(sdp->sd_rindex) && | |
1200 | !sdp->sd_rindex_uptodate) { | |
1201 | error = gfs2_ri_update(ip); | |
1202 | if (error) | |
1203 | return error; | |
1204 | goto try_again; | |
1205 | } | |
044b9414 | 1206 | gfs2_log_flush(sdp, NULL); |
0489b3f5 | 1207 | } |
044b9414 | 1208 | } while (error && tries++ < 3); |
b3b94faa | 1209 | |
cc0581bd | 1210 | if (error) { |
46290341 | 1211 | if (hold_rindex && ip != GFS2_I(sdp->sd_rindex)) |
7ae8fa84 | 1212 | gfs2_glock_dq_uninit(&al->al_ri_gh); |
044b9414 | 1213 | return error; |
b3b94faa | 1214 | } |
044b9414 | 1215 | |
ed4878e8 | 1216 | /* no error, so we have the rgrp set in the inode's allocation. */ |
b3b94faa DT |
1217 | al->al_file = file; |
1218 | al->al_line = line; | |
1219 | ||
1220 | return 0; | |
1221 | } | |
1222 | ||
1223 | /** | |
1224 | * gfs2_inplace_release - release an inplace reservation | |
1225 | * @ip: the inode the reservation was taken out on | |
1226 | * | |
1227 | * Release a reservation made by gfs2_inplace_reserve(). | |
1228 | */ | |
1229 | ||
1230 | void gfs2_inplace_release(struct gfs2_inode *ip) | |
1231 | { | |
feaa7bba | 1232 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 1233 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
1234 | |
1235 | if (gfs2_assert_warn(sdp, al->al_alloced <= al->al_requested) == -1) | |
1236 | fs_warn(sdp, "al_alloced = %u, al_requested = %u " | |
1237 | "al_file = %s, al_line = %u\n", | |
1238 | al->al_alloced, al->al_requested, al->al_file, | |
1239 | al->al_line); | |
1240 | ||
1241 | al->al_rgd = NULL; | |
292c8c14 AD |
1242 | if (al->al_rgd_gh.gh_gl) |
1243 | gfs2_glock_dq_uninit(&al->al_rgd_gh); | |
46290341 | 1244 | if (ip != GFS2_I(sdp->sd_rindex) && al->al_ri_gh.gh_gl) |
7ae8fa84 | 1245 | gfs2_glock_dq_uninit(&al->al_ri_gh); |
b3b94faa DT |
1246 | } |
1247 | ||
1248 | /** | |
1249 | * gfs2_get_block_type - Check a block in a RG is of given type | |
1250 | * @rgd: the resource group holding the block | |
1251 | * @block: the block number | |
1252 | * | |
1253 | * Returns: The block type (GFS2_BLKST_*) | |
1254 | */ | |
1255 | ||
acf7e244 | 1256 | static unsigned char gfs2_get_block_type(struct gfs2_rgrpd *rgd, u64 block) |
b3b94faa DT |
1257 | { |
1258 | struct gfs2_bitmap *bi = NULL; | |
cd915493 | 1259 | u32 length, rgrp_block, buf_block; |
b3b94faa DT |
1260 | unsigned int buf; |
1261 | unsigned char type; | |
1262 | ||
bb8d8a6f SW |
1263 | length = rgd->rd_length; |
1264 | rgrp_block = block - rgd->rd_data0; | |
b3b94faa DT |
1265 | |
1266 | for (buf = 0; buf < length; buf++) { | |
1267 | bi = rgd->rd_bits + buf; | |
1268 | if (rgrp_block < (bi->bi_start + bi->bi_len) * GFS2_NBBY) | |
1269 | break; | |
1270 | } | |
1271 | ||
1272 | gfs2_assert(rgd->rd_sbd, buf < length); | |
1273 | buf_block = rgrp_block - bi->bi_start * GFS2_NBBY; | |
1274 | ||
feaa7bba | 1275 | type = gfs2_testbit(rgd, bi->bi_bh->b_data + bi->bi_offset, |
b3b94faa DT |
1276 | bi->bi_len, buf_block); |
1277 | ||
1278 | return type; | |
1279 | } | |
1280 | ||
1281 | /** | |
1282 | * rgblk_search - find a block in @old_state, change allocation | |
1283 | * state to @new_state | |
1284 | * @rgd: the resource group descriptor | |
1285 | * @goal: the goal block within the RG (start here to search for avail block) | |
1286 | * @old_state: GFS2_BLKST_XXX the before-allocation state to find | |
1287 | * @new_state: GFS2_BLKST_XXX the after-allocation block state | |
b45e41d7 | 1288 | * @n: The extent length |
b3b94faa DT |
1289 | * |
1290 | * Walk rgrp's bitmap to find bits that represent a block in @old_state. | |
1291 | * Add the found bitmap buffer to the transaction. | |
1292 | * Set the found bits to @new_state to change block's allocation state. | |
1293 | * | |
1294 | * This function never fails, because we wouldn't call it unless we | |
1295 | * know (from reservation results, etc.) that a block is available. | |
1296 | * | |
1297 | * Scope of @goal and returned block is just within rgrp, not the whole | |
1298 | * filesystem. | |
1299 | * | |
1300 | * Returns: the block number allocated | |
1301 | */ | |
1302 | ||
cd915493 | 1303 | static u32 rgblk_search(struct gfs2_rgrpd *rgd, u32 goal, |
b45e41d7 SW |
1304 | unsigned char old_state, unsigned char new_state, |
1305 | unsigned int *n) | |
b3b94faa DT |
1306 | { |
1307 | struct gfs2_bitmap *bi = NULL; | |
b45e41d7 | 1308 | const u32 length = rgd->rd_length; |
60a0b8f9 | 1309 | u32 blk = BFITNOENT; |
b3b94faa | 1310 | unsigned int buf, x; |
b45e41d7 | 1311 | const unsigned int elen = *n; |
60a0b8f9 | 1312 | const u8 *buffer = NULL; |
b3b94faa | 1313 | |
b45e41d7 | 1314 | *n = 0; |
b3b94faa DT |
1315 | /* Find bitmap block that contains bits for goal block */ |
1316 | for (buf = 0; buf < length; buf++) { | |
1317 | bi = rgd->rd_bits + buf; | |
60a0b8f9 SW |
1318 | /* Convert scope of "goal" from rgrp-wide to within found bit block */ |
1319 | if (goal < (bi->bi_start + bi->bi_len) * GFS2_NBBY) { | |
1320 | goal -= bi->bi_start * GFS2_NBBY; | |
1321 | goto do_search; | |
1322 | } | |
b3b94faa | 1323 | } |
60a0b8f9 SW |
1324 | buf = 0; |
1325 | goal = 0; | |
b3b94faa | 1326 | |
60a0b8f9 | 1327 | do_search: |
b3b94faa DT |
1328 | /* Search (up to entire) bitmap in this rgrp for allocatable block. |
1329 | "x <= length", instead of "x < length", because we typically start | |
1330 | the search in the middle of a bit block, but if we can't find an | |
1331 | allocatable block anywhere else, we want to be able wrap around and | |
1332 | search in the first part of our first-searched bit block. */ | |
1333 | for (x = 0; x <= length; x++) { | |
60a0b8f9 SW |
1334 | bi = rgd->rd_bits + buf; |
1335 | ||
1336 | if (test_bit(GBF_FULL, &bi->bi_flags) && | |
1337 | (old_state == GFS2_BLKST_FREE)) | |
1338 | goto skip; | |
1339 | ||
5f3eae75 BP |
1340 | /* The GFS2_BLKST_UNLINKED state doesn't apply to the clone |
1341 | bitmaps, so we must search the originals for that. */ | |
b45e41d7 | 1342 | buffer = bi->bi_bh->b_data + bi->bi_offset; |
5f3eae75 | 1343 | if (old_state != GFS2_BLKST_UNLINKED && bi->bi_clone) |
110acf38 SW |
1344 | buffer = bi->bi_clone + bi->bi_offset; |
1345 | ||
1346 | blk = gfs2_bitfit(buffer, bi->bi_len, goal, old_state); | |
b3b94faa DT |
1347 | if (blk != BFITNOENT) |
1348 | break; | |
1349 | ||
60a0b8f9 SW |
1350 | if ((goal == 0) && (old_state == GFS2_BLKST_FREE)) |
1351 | set_bit(GBF_FULL, &bi->bi_flags); | |
1352 | ||
b3b94faa | 1353 | /* Try next bitmap block (wrap back to rgrp header if at end) */ |
60a0b8f9 SW |
1354 | skip: |
1355 | buf++; | |
1356 | buf %= length; | |
b3b94faa DT |
1357 | goal = 0; |
1358 | } | |
1359 | ||
60a0b8f9 SW |
1360 | if (blk == BFITNOENT) |
1361 | return blk; | |
1362 | *n = 1; | |
1363 | if (old_state == new_state) | |
1364 | goto out; | |
1365 | ||
1366 | gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1); | |
1367 | gfs2_setbit(rgd, bi->bi_bh->b_data, bi->bi_clone, bi->bi_offset, | |
1368 | bi->bi_len, blk, new_state); | |
1369 | goal = blk; | |
1370 | while (*n < elen) { | |
1371 | goal++; | |
1372 | if (goal >= (bi->bi_len * GFS2_NBBY)) | |
1373 | break; | |
1374 | if (gfs2_testbit(rgd, buffer, bi->bi_len, goal) != | |
1375 | GFS2_BLKST_FREE) | |
1376 | break; | |
b45e41d7 | 1377 | gfs2_setbit(rgd, bi->bi_bh->b_data, bi->bi_clone, bi->bi_offset, |
60a0b8f9 SW |
1378 | bi->bi_len, goal, new_state); |
1379 | (*n)++; | |
c8cdf479 | 1380 | } |
60a0b8f9 SW |
1381 | out: |
1382 | return (bi->bi_start * GFS2_NBBY) + blk; | |
b3b94faa DT |
1383 | } |
1384 | ||
1385 | /** | |
1386 | * rgblk_free - Change alloc state of given block(s) | |
1387 | * @sdp: the filesystem | |
1388 | * @bstart: the start of a run of blocks to free | |
1389 | * @blen: the length of the block run (all must lie within ONE RG!) | |
1390 | * @new_state: GFS2_BLKST_XXX the after-allocation block state | |
1391 | * | |
1392 | * Returns: Resource group containing the block(s) | |
1393 | */ | |
1394 | ||
cd915493 SW |
1395 | static struct gfs2_rgrpd *rgblk_free(struct gfs2_sbd *sdp, u64 bstart, |
1396 | u32 blen, unsigned char new_state) | |
b3b94faa DT |
1397 | { |
1398 | struct gfs2_rgrpd *rgd; | |
1399 | struct gfs2_bitmap *bi = NULL; | |
cd915493 | 1400 | u32 length, rgrp_blk, buf_blk; |
b3b94faa DT |
1401 | unsigned int buf; |
1402 | ||
1403 | rgd = gfs2_blk2rgrpd(sdp, bstart); | |
1404 | if (!rgd) { | |
1405 | if (gfs2_consist(sdp)) | |
382066da | 1406 | fs_err(sdp, "block = %llu\n", (unsigned long long)bstart); |
b3b94faa DT |
1407 | return NULL; |
1408 | } | |
1409 | ||
bb8d8a6f | 1410 | length = rgd->rd_length; |
b3b94faa | 1411 | |
bb8d8a6f | 1412 | rgrp_blk = bstart - rgd->rd_data0; |
b3b94faa DT |
1413 | |
1414 | while (blen--) { | |
1415 | for (buf = 0; buf < length; buf++) { | |
1416 | bi = rgd->rd_bits + buf; | |
1417 | if (rgrp_blk < (bi->bi_start + bi->bi_len) * GFS2_NBBY) | |
1418 | break; | |
1419 | } | |
1420 | ||
1421 | gfs2_assert(rgd->rd_sbd, buf < length); | |
1422 | ||
1423 | buf_blk = rgrp_blk - bi->bi_start * GFS2_NBBY; | |
1424 | rgrp_blk++; | |
1425 | ||
1426 | if (!bi->bi_clone) { | |
1427 | bi->bi_clone = kmalloc(bi->bi_bh->b_size, | |
dd894be8 | 1428 | GFP_NOFS | __GFP_NOFAIL); |
b3b94faa DT |
1429 | memcpy(bi->bi_clone + bi->bi_offset, |
1430 | bi->bi_bh->b_data + bi->bi_offset, | |
1431 | bi->bi_len); | |
1432 | } | |
d4e9c4c3 | 1433 | gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1); |
b45e41d7 | 1434 | gfs2_setbit(rgd, bi->bi_bh->b_data, NULL, bi->bi_offset, |
b3b94faa DT |
1435 | bi->bi_len, buf_blk, new_state); |
1436 | } | |
1437 | ||
1438 | return rgd; | |
1439 | } | |
1440 | ||
1441 | /** | |
09010978 SW |
1442 | * gfs2_rgrp_dump - print out an rgrp |
1443 | * @seq: The iterator | |
1444 | * @gl: The glock in question | |
1445 | * | |
1446 | */ | |
1447 | ||
1448 | int gfs2_rgrp_dump(struct seq_file *seq, const struct gfs2_glock *gl) | |
1449 | { | |
1450 | const struct gfs2_rgrpd *rgd = gl->gl_object; | |
1451 | if (rgd == NULL) | |
1452 | return 0; | |
1453 | gfs2_print_dbg(seq, " R: n:%llu f:%02x b:%u/%u i:%u\n", | |
1454 | (unsigned long long)rgd->rd_addr, rgd->rd_flags, | |
1455 | rgd->rd_free, rgd->rd_free_clone, rgd->rd_dinodes); | |
1456 | return 0; | |
1457 | } | |
1458 | ||
6050b9c7 SW |
1459 | static void gfs2_rgrp_error(struct gfs2_rgrpd *rgd) |
1460 | { | |
1461 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
1462 | fs_warn(sdp, "rgrp %llu has an error, marking it readonly until umount\n", | |
86d00636 | 1463 | (unsigned long long)rgd->rd_addr); |
6050b9c7 SW |
1464 | fs_warn(sdp, "umount on all nodes and run fsck.gfs2 to fix the error\n"); |
1465 | gfs2_rgrp_dump(NULL, rgd->rd_gl); | |
1466 | rgd->rd_flags |= GFS2_RDF_ERROR; | |
1467 | } | |
1468 | ||
09010978 SW |
1469 | /** |
1470 | * gfs2_alloc_block - Allocate one or more blocks | |
1639431a | 1471 | * @ip: the inode to allocate the block for |
09010978 SW |
1472 | * @bn: Used to return the starting block number |
1473 | * @n: requested number of blocks/extent length (value/result) | |
b3b94faa | 1474 | * |
09010978 | 1475 | * Returns: 0 or error |
b3b94faa DT |
1476 | */ |
1477 | ||
09010978 | 1478 | int gfs2_alloc_block(struct gfs2_inode *ip, u64 *bn, unsigned int *n) |
b3b94faa | 1479 | { |
feaa7bba | 1480 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
d9ba7615 | 1481 | struct buffer_head *dibh; |
6dbd8224 | 1482 | struct gfs2_alloc *al = ip->i_alloc; |
9a3f236d | 1483 | struct gfs2_rgrpd *rgd; |
cd915493 SW |
1484 | u32 goal, blk; |
1485 | u64 block; | |
d9ba7615 | 1486 | int error; |
b3b94faa | 1487 | |
9a3f236d SW |
1488 | /* Only happens if there is a bug in gfs2, return something distinctive |
1489 | * to ensure that it is noticed. | |
1490 | */ | |
1491 | if (al == NULL) | |
1492 | return -ECANCELED; | |
1493 | ||
1494 | rgd = al->al_rgd; | |
1495 | ||
ce276b06 SW |
1496 | if (rgrp_contains_block(rgd, ip->i_goal)) |
1497 | goal = ip->i_goal - rgd->rd_data0; | |
b3b94faa | 1498 | else |
ac576cc5 | 1499 | goal = rgd->rd_last_alloc; |
b3b94faa | 1500 | |
b45e41d7 | 1501 | blk = rgblk_search(rgd, goal, GFS2_BLKST_FREE, GFS2_BLKST_USED, n); |
09010978 SW |
1502 | |
1503 | /* Since all blocks are reserved in advance, this shouldn't happen */ | |
1504 | if (blk == BFITNOENT) | |
1505 | goto rgrp_error; | |
b3b94faa | 1506 | |
b45e41d7 | 1507 | rgd->rd_last_alloc = blk; |
bb8d8a6f | 1508 | block = rgd->rd_data0 + blk; |
ce276b06 | 1509 | ip->i_goal = block; |
d9ba7615 SW |
1510 | error = gfs2_meta_inode_buffer(ip, &dibh); |
1511 | if (error == 0) { | |
1512 | struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; | |
1513 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); | |
1514 | di->di_goal_meta = di->di_goal_data = cpu_to_be64(ip->i_goal); | |
1515 | brelse(dibh); | |
1516 | } | |
09010978 SW |
1517 | if (rgd->rd_free < *n) |
1518 | goto rgrp_error; | |
1519 | ||
cfc8b549 | 1520 | rgd->rd_free -= *n; |
b3b94faa | 1521 | |
d4e9c4c3 | 1522 | gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1); |
42d52e38 | 1523 | gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); |
b3b94faa | 1524 | |
b45e41d7 | 1525 | al->al_alloced += *n; |
b3b94faa | 1526 | |
ad99f777 | 1527 | gfs2_statfs_change(sdp, 0, -(s64)*n, 0); |
b45e41d7 | 1528 | gfs2_quota_change(ip, *n, ip->i_inode.i_uid, ip->i_inode.i_gid); |
b3b94faa DT |
1529 | |
1530 | spin_lock(&sdp->sd_rindex_spin); | |
b45e41d7 | 1531 | rgd->rd_free_clone -= *n; |
b3b94faa | 1532 | spin_unlock(&sdp->sd_rindex_spin); |
63997775 | 1533 | trace_gfs2_block_alloc(ip, block, *n, GFS2_BLKST_USED); |
09010978 SW |
1534 | *bn = block; |
1535 | return 0; | |
1536 | ||
1537 | rgrp_error: | |
6050b9c7 | 1538 | gfs2_rgrp_error(rgd); |
09010978 | 1539 | return -EIO; |
b3b94faa DT |
1540 | } |
1541 | ||
1542 | /** | |
1543 | * gfs2_alloc_di - Allocate a dinode | |
1544 | * @dip: the directory that the inode is going in | |
6050b9c7 SW |
1545 | * @bn: the block number which is allocated |
1546 | * @generation: the generation number of the inode | |
b3b94faa | 1547 | * |
6050b9c7 | 1548 | * Returns: 0 on success or error |
b3b94faa DT |
1549 | */ |
1550 | ||
6050b9c7 | 1551 | int gfs2_alloc_di(struct gfs2_inode *dip, u64 *bn, u64 *generation) |
b3b94faa | 1552 | { |
feaa7bba | 1553 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
6dbd8224 | 1554 | struct gfs2_alloc *al = dip->i_alloc; |
b3b94faa | 1555 | struct gfs2_rgrpd *rgd = al->al_rgd; |
4340fe62 SW |
1556 | u32 blk; |
1557 | u64 block; | |
b45e41d7 | 1558 | unsigned int n = 1; |
b3b94faa | 1559 | |
ac576cc5 | 1560 | blk = rgblk_search(rgd, rgd->rd_last_alloc, |
b45e41d7 | 1561 | GFS2_BLKST_FREE, GFS2_BLKST_DINODE, &n); |
b3b94faa | 1562 | |
6050b9c7 SW |
1563 | /* Since all blocks are reserved in advance, this shouldn't happen */ |
1564 | if (blk == BFITNOENT) | |
1565 | goto rgrp_error; | |
b3b94faa | 1566 | |
6050b9c7 | 1567 | rgd->rd_last_alloc = blk; |
bb8d8a6f | 1568 | block = rgd->rd_data0 + blk; |
05164e5b SW |
1569 | if (rgd->rd_free == 0) |
1570 | goto rgrp_error; | |
1571 | ||
cfc8b549 | 1572 | rgd->rd_free--; |
73f74948 | 1573 | rgd->rd_dinodes++; |
d8b71f73 | 1574 | *generation = rgd->rd_igeneration++; |
8d8291ae SW |
1575 | if (*generation == 0) |
1576 | *generation = rgd->rd_igeneration++; | |
d4e9c4c3 | 1577 | gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1); |
42d52e38 | 1578 | gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); |
b3b94faa DT |
1579 | |
1580 | al->al_alloced++; | |
1581 | ||
1582 | gfs2_statfs_change(sdp, 0, -1, +1); | |
5731be53 | 1583 | gfs2_trans_add_unrevoke(sdp, block, 1); |
b3b94faa DT |
1584 | |
1585 | spin_lock(&sdp->sd_rindex_spin); | |
1586 | rgd->rd_free_clone--; | |
1587 | spin_unlock(&sdp->sd_rindex_spin); | |
63997775 | 1588 | trace_gfs2_block_alloc(dip, block, 1, GFS2_BLKST_DINODE); |
6050b9c7 SW |
1589 | *bn = block; |
1590 | return 0; | |
1591 | ||
1592 | rgrp_error: | |
1593 | gfs2_rgrp_error(rgd); | |
1594 | return -EIO; | |
b3b94faa DT |
1595 | } |
1596 | ||
1597 | /** | |
1598 | * gfs2_free_data - free a contiguous run of data block(s) | |
1599 | * @ip: the inode these blocks are being freed from | |
1600 | * @bstart: first block of a run of contiguous blocks | |
1601 | * @blen: the length of the block run | |
1602 | * | |
1603 | */ | |
1604 | ||
4c16c36a | 1605 | void __gfs2_free_data(struct gfs2_inode *ip, u64 bstart, u32 blen) |
b3b94faa | 1606 | { |
feaa7bba | 1607 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1608 | struct gfs2_rgrpd *rgd; |
1609 | ||
1610 | rgd = rgblk_free(sdp, bstart, blen, GFS2_BLKST_FREE); | |
1611 | if (!rgd) | |
1612 | return; | |
63997775 | 1613 | trace_gfs2_block_alloc(ip, bstart, blen, GFS2_BLKST_FREE); |
cfc8b549 | 1614 | rgd->rd_free += blen; |
b3b94faa | 1615 | |
d4e9c4c3 | 1616 | gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1); |
42d52e38 | 1617 | gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); |
b3b94faa DT |
1618 | |
1619 | gfs2_trans_add_rg(rgd); | |
4c16c36a | 1620 | } |
b3b94faa | 1621 | |
4c16c36a BP |
1622 | /** |
1623 | * gfs2_free_data - free a contiguous run of data block(s) | |
1624 | * @ip: the inode these blocks are being freed from | |
1625 | * @bstart: first block of a run of contiguous blocks | |
1626 | * @blen: the length of the block run | |
1627 | * | |
1628 | */ | |
1629 | ||
1630 | void gfs2_free_data(struct gfs2_inode *ip, u64 bstart, u32 blen) | |
1631 | { | |
1632 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
1633 | ||
1634 | __gfs2_free_data(ip, bstart, blen); | |
b3b94faa | 1635 | gfs2_statfs_change(sdp, 0, +blen, 0); |
2933f925 | 1636 | gfs2_quota_change(ip, -(s64)blen, ip->i_inode.i_uid, ip->i_inode.i_gid); |
b3b94faa DT |
1637 | } |
1638 | ||
1639 | /** | |
1640 | * gfs2_free_meta - free a contiguous run of data block(s) | |
1641 | * @ip: the inode these blocks are being freed from | |
1642 | * @bstart: first block of a run of contiguous blocks | |
1643 | * @blen: the length of the block run | |
1644 | * | |
1645 | */ | |
1646 | ||
4c16c36a | 1647 | void __gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen) |
b3b94faa | 1648 | { |
feaa7bba | 1649 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1650 | struct gfs2_rgrpd *rgd; |
1651 | ||
1652 | rgd = rgblk_free(sdp, bstart, blen, GFS2_BLKST_FREE); | |
1653 | if (!rgd) | |
1654 | return; | |
63997775 | 1655 | trace_gfs2_block_alloc(ip, bstart, blen, GFS2_BLKST_FREE); |
cfc8b549 | 1656 | rgd->rd_free += blen; |
b3b94faa | 1657 | |
d4e9c4c3 | 1658 | gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1); |
42d52e38 | 1659 | gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); |
b3b94faa DT |
1660 | |
1661 | gfs2_trans_add_rg(rgd); | |
4c16c36a BP |
1662 | gfs2_meta_wipe(ip, bstart, blen); |
1663 | } | |
b3b94faa | 1664 | |
4c16c36a BP |
1665 | /** |
1666 | * gfs2_free_meta - free a contiguous run of data block(s) | |
1667 | * @ip: the inode these blocks are being freed from | |
1668 | * @bstart: first block of a run of contiguous blocks | |
1669 | * @blen: the length of the block run | |
1670 | * | |
1671 | */ | |
1672 | ||
1673 | void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen) | |
1674 | { | |
1675 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
1676 | ||
1677 | __gfs2_free_meta(ip, bstart, blen); | |
b3b94faa | 1678 | gfs2_statfs_change(sdp, 0, +blen, 0); |
2933f925 | 1679 | gfs2_quota_change(ip, -(s64)blen, ip->i_inode.i_uid, ip->i_inode.i_gid); |
b3b94faa DT |
1680 | } |
1681 | ||
feaa7bba SW |
1682 | void gfs2_unlink_di(struct inode *inode) |
1683 | { | |
1684 | struct gfs2_inode *ip = GFS2_I(inode); | |
1685 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
1686 | struct gfs2_rgrpd *rgd; | |
dbb7cae2 | 1687 | u64 blkno = ip->i_no_addr; |
feaa7bba SW |
1688 | |
1689 | rgd = rgblk_free(sdp, blkno, 1, GFS2_BLKST_UNLINKED); | |
1690 | if (!rgd) | |
1691 | return; | |
63997775 | 1692 | trace_gfs2_block_alloc(ip, blkno, 1, GFS2_BLKST_UNLINKED); |
feaa7bba | 1693 | gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1); |
42d52e38 | 1694 | gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); |
feaa7bba SW |
1695 | gfs2_trans_add_rg(rgd); |
1696 | } | |
1697 | ||
cd915493 | 1698 | static void gfs2_free_uninit_di(struct gfs2_rgrpd *rgd, u64 blkno) |
b3b94faa DT |
1699 | { |
1700 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
1701 | struct gfs2_rgrpd *tmp_rgd; | |
1702 | ||
1703 | tmp_rgd = rgblk_free(sdp, blkno, 1, GFS2_BLKST_FREE); | |
1704 | if (!tmp_rgd) | |
1705 | return; | |
1706 | gfs2_assert_withdraw(sdp, rgd == tmp_rgd); | |
1707 | ||
73f74948 | 1708 | if (!rgd->rd_dinodes) |
b3b94faa | 1709 | gfs2_consist_rgrpd(rgd); |
73f74948 | 1710 | rgd->rd_dinodes--; |
cfc8b549 | 1711 | rgd->rd_free++; |
b3b94faa | 1712 | |
d4e9c4c3 | 1713 | gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1); |
42d52e38 | 1714 | gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); |
b3b94faa DT |
1715 | |
1716 | gfs2_statfs_change(sdp, 0, +1, -1); | |
1717 | gfs2_trans_add_rg(rgd); | |
1718 | } | |
1719 | ||
b3b94faa DT |
1720 | |
1721 | void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip) | |
1722 | { | |
dbb7cae2 | 1723 | gfs2_free_uninit_di(rgd, ip->i_no_addr); |
63997775 | 1724 | trace_gfs2_block_alloc(ip, ip->i_no_addr, 1, GFS2_BLKST_FREE); |
2933f925 | 1725 | gfs2_quota_change(ip, -1, ip->i_inode.i_uid, ip->i_inode.i_gid); |
dbb7cae2 | 1726 | gfs2_meta_wipe(ip, ip->i_no_addr, 1); |
b3b94faa DT |
1727 | } |
1728 | ||
acf7e244 SW |
1729 | /** |
1730 | * gfs2_check_blk_type - Check the type of a block | |
1731 | * @sdp: The superblock | |
1732 | * @no_addr: The block number to check | |
1733 | * @type: The block type we are looking for | |
1734 | * | |
1735 | * Returns: 0 if the block type matches the expected type | |
1736 | * -ESTALE if it doesn't match | |
1737 | * or -ve errno if something went wrong while checking | |
1738 | */ | |
1739 | ||
1740 | int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr, unsigned int type) | |
1741 | { | |
1742 | struct gfs2_rgrpd *rgd; | |
1743 | struct gfs2_holder ri_gh, rgd_gh; | |
2c776349 SW |
1744 | struct gfs2_inode *ip = GFS2_I(sdp->sd_rindex); |
1745 | int ri_locked = 0; | |
acf7e244 SW |
1746 | int error; |
1747 | ||
2c776349 SW |
1748 | if (!gfs2_glock_is_locked_by_me(ip->i_gl)) { |
1749 | error = gfs2_rindex_hold(sdp, &ri_gh); | |
1750 | if (error) | |
1751 | goto fail; | |
1752 | ri_locked = 1; | |
1753 | } | |
acf7e244 SW |
1754 | |
1755 | error = -EINVAL; | |
1756 | rgd = gfs2_blk2rgrpd(sdp, no_addr); | |
1757 | if (!rgd) | |
1758 | goto fail_rindex; | |
1759 | ||
1760 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_SHARED, 0, &rgd_gh); | |
1761 | if (error) | |
1762 | goto fail_rindex; | |
1763 | ||
1764 | if (gfs2_get_block_type(rgd, no_addr) != type) | |
1765 | error = -ESTALE; | |
1766 | ||
1767 | gfs2_glock_dq_uninit(&rgd_gh); | |
1768 | fail_rindex: | |
2c776349 SW |
1769 | if (ri_locked) |
1770 | gfs2_glock_dq_uninit(&ri_gh); | |
acf7e244 SW |
1771 | fail: |
1772 | return error; | |
1773 | } | |
1774 | ||
b3b94faa DT |
1775 | /** |
1776 | * gfs2_rlist_add - add a RG to a list of RGs | |
1777 | * @sdp: the filesystem | |
1778 | * @rlist: the list of resource groups | |
1779 | * @block: the block | |
1780 | * | |
1781 | * Figure out what RG a block belongs to and add that RG to the list | |
1782 | * | |
1783 | * FIXME: Don't use NOFAIL | |
1784 | * | |
1785 | */ | |
1786 | ||
1787 | void gfs2_rlist_add(struct gfs2_sbd *sdp, struct gfs2_rgrp_list *rlist, | |
cd915493 | 1788 | u64 block) |
b3b94faa DT |
1789 | { |
1790 | struct gfs2_rgrpd *rgd; | |
1791 | struct gfs2_rgrpd **tmp; | |
1792 | unsigned int new_space; | |
1793 | unsigned int x; | |
1794 | ||
1795 | if (gfs2_assert_warn(sdp, !rlist->rl_ghs)) | |
1796 | return; | |
1797 | ||
1798 | rgd = gfs2_blk2rgrpd(sdp, block); | |
1799 | if (!rgd) { | |
1800 | if (gfs2_consist(sdp)) | |
382066da | 1801 | fs_err(sdp, "block = %llu\n", (unsigned long long)block); |
b3b94faa DT |
1802 | return; |
1803 | } | |
1804 | ||
1805 | for (x = 0; x < rlist->rl_rgrps; x++) | |
1806 | if (rlist->rl_rgd[x] == rgd) | |
1807 | return; | |
1808 | ||
1809 | if (rlist->rl_rgrps == rlist->rl_space) { | |
1810 | new_space = rlist->rl_space + 10; | |
1811 | ||
1812 | tmp = kcalloc(new_space, sizeof(struct gfs2_rgrpd *), | |
dd894be8 | 1813 | GFP_NOFS | __GFP_NOFAIL); |
b3b94faa DT |
1814 | |
1815 | if (rlist->rl_rgd) { | |
1816 | memcpy(tmp, rlist->rl_rgd, | |
1817 | rlist->rl_space * sizeof(struct gfs2_rgrpd *)); | |
1818 | kfree(rlist->rl_rgd); | |
1819 | } | |
1820 | ||
1821 | rlist->rl_space = new_space; | |
1822 | rlist->rl_rgd = tmp; | |
1823 | } | |
1824 | ||
1825 | rlist->rl_rgd[rlist->rl_rgrps++] = rgd; | |
1826 | } | |
1827 | ||
1828 | /** | |
1829 | * gfs2_rlist_alloc - all RGs have been added to the rlist, now allocate | |
1830 | * and initialize an array of glock holders for them | |
1831 | * @rlist: the list of resource groups | |
1832 | * @state: the lock state to acquire the RG lock in | |
1833 | * @flags: the modifier flags for the holder structures | |
1834 | * | |
1835 | * FIXME: Don't use NOFAIL | |
1836 | * | |
1837 | */ | |
1838 | ||
fe6c991c | 1839 | void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist, unsigned int state) |
b3b94faa DT |
1840 | { |
1841 | unsigned int x; | |
1842 | ||
1843 | rlist->rl_ghs = kcalloc(rlist->rl_rgrps, sizeof(struct gfs2_holder), | |
dd894be8 | 1844 | GFP_NOFS | __GFP_NOFAIL); |
b3b94faa DT |
1845 | for (x = 0; x < rlist->rl_rgrps; x++) |
1846 | gfs2_holder_init(rlist->rl_rgd[x]->rd_gl, | |
fe6c991c | 1847 | state, 0, |
b3b94faa DT |
1848 | &rlist->rl_ghs[x]); |
1849 | } | |
1850 | ||
1851 | /** | |
1852 | * gfs2_rlist_free - free a resource group list | |
1853 | * @list: the list of resource groups | |
1854 | * | |
1855 | */ | |
1856 | ||
1857 | void gfs2_rlist_free(struct gfs2_rgrp_list *rlist) | |
1858 | { | |
1859 | unsigned int x; | |
1860 | ||
1861 | kfree(rlist->rl_rgd); | |
1862 | ||
1863 | if (rlist->rl_ghs) { | |
1864 | for (x = 0; x < rlist->rl_rgrps; x++) | |
1865 | gfs2_holder_uninit(&rlist->rl_ghs[x]); | |
1866 | kfree(rlist->rl_ghs); | |
1867 | } | |
1868 | } | |
1869 |