blob: 565038243fa2bcc6139ceb5b2bcfeeb107df6c73 [file] [log] [blame]
David Teiglandb3b94fa2006-01-16 16:50:04 +00001/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
Bob Petersonfe6c9912008-01-28 11:13:02 -06003 * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
David Teiglandb3b94fa2006-01-16 16:50:04 +00004 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04007 * of the GNU General Public License version 2.
David Teiglandb3b94fa2006-01-16 16:50:04 +00008 */
9
David Teiglandb3b94fa2006-01-16 16:50:04 +000010#include <linux/slab.h>
11#include <linux/spinlock.h>
12#include <linux/completion.h>
13#include <linux/buffer_head.h>
Steven Whitehousef42faf42006-01-30 18:34:10 +000014#include <linux/fs.h>
Steven Whitehouse5c676f62006-02-27 17:23:27 -050015#include <linux/gfs2_ondisk.h>
Bob Peterson1f466a42008-03-10 18:17:47 -050016#include <linux/prefetch.h>
Steven Whitehousef15ab562009-02-09 09:25:01 +000017#include <linux/blkdev.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000018
19#include "gfs2.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050020#include "incore.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000021#include "glock.h"
22#include "glops.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000023#include "lops.h"
24#include "meta_io.h"
25#include "quota.h"
26#include "rgrp.h"
27#include "super.h"
28#include "trans.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050029#include "util.h"
Benjamin Marzinski172e0452007-03-23 14:51:56 -060030#include "log.h"
Steven Whitehousec8cdf472007-06-08 10:05:33 +010031#include "inode.h"
Steven Whitehouse51ff87b2007-10-15 14:42:35 +010032#include "ops_address.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000033
Steven Whitehouse2c1e52a2006-09-05 15:41:57 -040034#define BFITNOENT ((u32)~0)
Bob Peterson6760bdc2007-07-24 14:09:32 -050035#define NO_BLOCK ((u64)~0)
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -040036
Bob Peterson1f466a42008-03-10 18:17:47 -050037#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
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -040047/*
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
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040050 * 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)
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -040056 */
57
58static const char valid_change[16] = {
59 /* current */
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040060 /* n */ 0, 1, 1, 1,
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -040061 /* e */ 1, 0, 0, 0,
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040062 /* w */ 0, 0, 0, 1,
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -040063 1, 0, 0, 0
64};
65
Steven Whitehousec8cdf472007-06-08 10:05:33 +010066static u32 rgblk_search(struct gfs2_rgrpd *rgd, u32 goal,
Steven Whitehouseb45e41d2008-02-06 10:11:15 +000067 unsigned char old_state, unsigned char new_state,
68 unsigned int *n);
Steven Whitehousec8cdf472007-06-08 10:05:33 +010069
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -040070/**
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
Steven Whitehouseb45e41d2008-02-06 10:11:15 +000079static 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)
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -040083{
Steven Whitehouseb45e41d2008-02-06 10:11:15 +000084 unsigned char *byte1, *byte2, *end, cur_state;
85 const unsigned int bit = (block % GFS2_NBBY) * GFS2_BIT_SIZE;
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -040086
Steven Whitehouseb45e41d2008-02-06 10:11:15 +000087 byte1 = buf1 + offset + (block / GFS2_NBBY);
88 end = buf1 + offset + buflen;
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -040089
Steven Whitehouseb45e41d2008-02-06 10:11:15 +000090 BUG_ON(byte1 >= end);
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -040091
Steven Whitehouseb45e41d2008-02-06 10:11:15 +000092 cur_state = (*byte1 >> bit) & GFS2_BIT_MASK;
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -040093
Steven Whitehouseb45e41d2008-02-06 10:11:15 +000094 if (unlikely(!valid_change[new_state * 4 + cur_state])) {
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -040095 gfs2_consist_rgrpd(rgd);
Steven Whitehouseb45e41d2008-02-06 10:11:15 +000096 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 }
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -0400105}
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
Steven Whitehouseb45e41d2008-02-06 10:11:15 +0000115static inline unsigned char gfs2_testbit(struct gfs2_rgrpd *rgd,
116 const unsigned char *buffer,
117 unsigned int buflen, u32 block)
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -0400118{
Steven Whitehouseb45e41d2008-02-06 10:11:15 +0000119 const unsigned char *byte, *end;
120 unsigned char cur_state;
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -0400121 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/**
Steven Whitehouse223b2b82009-02-17 14:13:35 +0000135 * 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
152static inline u64 gfs2_bit_search(const __le64 *ptr, u64 mask, u8 state)
153{
154 u64 tmp;
155 static const u64 search[] = {
Hannes Eder075ac442009-02-21 02:11:42 +0100156 [0] = 0xffffffffffffffffULL,
157 [1] = 0xaaaaaaaaaaaaaaaaULL,
158 [2] = 0x5555555555555555ULL,
159 [3] = 0x0000000000000000ULL,
Steven Whitehouse223b2b82009-02-17 14:13:35 +0000160 };
161 tmp = le64_to_cpu(*ptr) ^ search[state];
162 tmp &= (tmp >> 1);
163 tmp &= mask;
164 return tmp;
165}
166
167/**
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -0400168 * 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
Steven Whitehouse223b2b82009-02-17 14:13:35 +0000171 * @len: the length (in bytes) of the buffer
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -0400172 * @goal: start search at this block's bit-pair (within @buffer)
Steven Whitehouse223b2b82009-02-17 14:13:35 +0000173 * @state: GFS2_BLKST_XXX the state of the block we're looking for.
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -0400174 *
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
Steven Whitehouse223b2b82009-02-17 14:13:35 +0000177 * 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
182 * always ok to to read a complete multiple of 64 bits at the end
183 * of the block in case the end is no aligned to a natural boundary.
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -0400184 *
185 * Return: the block number (bitmap buffer scope) that was found
186 */
187
Hannes Eder02ab1722009-02-21 02:12:05 +0100188static u32 gfs2_bitfit(const u8 *buf, const unsigned int len,
189 u32 goal, u8 state)
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -0400190{
Steven Whitehouse223b2b82009-02-17 14:13:35 +0000191 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;
Hannes Eder075ac442009-02-21 02:11:42 +0100195 u64 mask = 0x5555555555555555ULL;
Steven Whitehouse223b2b82009-02-17 14:13:35 +0000196 u32 bit;
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -0400197
Steven Whitehouse223b2b82009-02-17 14:13:35 +0000198 BUG_ON(state > 3);
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -0400199
Steven Whitehouse223b2b82009-02-17 14:13:35 +0000200 /* 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) {
Hannes Eder075ac442009-02-21 02:11:42 +0100205 tmp = gfs2_bit_search(ptr, 0x5555555555555555ULL, state);
Steven Whitehouse223b2b82009-02-17 14:13:35 +0000206 ptr++;
Bob Peterson1f466a42008-03-10 18:17:47 -0500207 }
Steven Whitehouse223b2b82009-02-17 14:13:35 +0000208 /* 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--;
Steven Whitehoused8bd5042009-04-23 08:54:02 +0100215 bit = __ffs64(tmp);
Steven Whitehouse223b2b82009-02-17 14:13:35 +0000216 bit /= 2; /* two bits per entry in the bitmap */
217 return (((const unsigned char *)ptr - buf) * GFS2_NBBY) + bit;
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -0400218}
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
Steven Whitehouse110acf32008-01-29 13:30:20 +0000229static u32 gfs2_bitcount(struct gfs2_rgrpd *rgd, const u8 *buffer,
230 unsigned int buflen, u8 state)
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -0400231{
Steven Whitehouse110acf32008-01-29 13:30:20 +0000232 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;
Steven Whitehousecd915492006-09-04 12:49:07 -0400237 u32 count = 0;
Steven Whitehouse88c8ab1f2006-05-18 13:52:39 -0400238
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
David Teiglandb3b94fa2006-01-16 16:50:04 +0000253/**
254 * gfs2_rgrp_verify - Verify that a resource group is consistent
255 * @sdp: the filesystem
256 * @rgd: the rgrp
257 *
258 */
259
260void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd)
261{
262 struct gfs2_sbd *sdp = rgd->rd_sbd;
263 struct gfs2_bitmap *bi = NULL;
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100264 u32 length = rgd->rd_length;
Steven Whitehousecd915492006-09-04 12:49:07 -0400265 u32 count[4], tmp;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000266 int buf, x;
267
Steven Whitehousecd915492006-09-04 12:49:07 -0400268 memset(count, 0, 4 * sizeof(u32));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000269
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
Steven Whitehousecfc8b542008-11-04 10:25:13 +0000280 if (count[0] != rgd->rd_free) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000281 if (gfs2_consist_rgrpd(rgd))
282 fs_err(sdp, "free data mismatch: %u != %u\n",
Steven Whitehousecfc8b542008-11-04 10:25:13 +0000283 count[0], rgd->rd_free);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000284 return;
285 }
286
Steven Whitehouse73f74942008-11-04 10:32:57 +0000287 tmp = rgd->rd_data - rgd->rd_free - rgd->rd_dinodes;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400288 if (count[1] + count[2] != tmp) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000289 if (gfs2_consist_rgrpd(rgd))
290 fs_err(sdp, "used data mismatch: %u != %u\n",
291 count[1], tmp);
292 return;
293 }
294
Steven Whitehouse73f74942008-11-04 10:32:57 +0000295 if (count[3] != rgd->rd_dinodes) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000296 if (gfs2_consist_rgrpd(rgd))
297 fs_err(sdp, "used metadata mismatch: %u != %u\n",
Steven Whitehouse73f74942008-11-04 10:32:57 +0000298 count[3], rgd->rd_dinodes);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000299 return;
300 }
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400301
302 if (count[2] > count[3]) {
303 if (gfs2_consist_rgrpd(rgd))
304 fs_err(sdp, "unlinked inodes > inodes: %u\n",
305 count[2]);
306 return;
307 }
308
David Teiglandb3b94fa2006-01-16 16:50:04 +0000309}
310
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100311static inline int rgrp_contains_block(struct gfs2_rgrpd *rgd, u64 block)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000312{
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100313 u64 first = rgd->rd_data0;
314 u64 last = first + rgd->rd_data;
Steven Whitehouse16910422006-09-05 11:15:45 -0400315 return first <= block && block < last;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000316}
317
318/**
319 * gfs2_blk2rgrpd - Find resource group for a given data/meta block number
320 * @sdp: The GFS2 superblock
321 * @n: The data block number
322 *
323 * Returns: The resource group, or NULL if not found
324 */
325
Steven Whitehousecd915492006-09-04 12:49:07 -0400326struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000327{
328 struct gfs2_rgrpd *rgd;
329
330 spin_lock(&sdp->sd_rindex_spin);
331
332 list_for_each_entry(rgd, &sdp->sd_rindex_mru_list, rd_list_mru) {
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100333 if (rgrp_contains_block(rgd, blk)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000334 list_move(&rgd->rd_list_mru, &sdp->sd_rindex_mru_list);
335 spin_unlock(&sdp->sd_rindex_spin);
336 return rgd;
337 }
338 }
339
340 spin_unlock(&sdp->sd_rindex_spin);
341
342 return NULL;
343}
344
345/**
346 * gfs2_rgrpd_get_first - get the first Resource Group in the filesystem
347 * @sdp: The GFS2 superblock
348 *
349 * Returns: The first rgrp in the filesystem
350 */
351
352struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp)
353{
354 gfs2_assert(sdp, !list_empty(&sdp->sd_rindex_list));
355 return list_entry(sdp->sd_rindex_list.next, struct gfs2_rgrpd, rd_list);
356}
357
358/**
359 * gfs2_rgrpd_get_next - get the next RG
360 * @rgd: A RG
361 *
362 * Returns: The next rgrp
363 */
364
365struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd)
366{
367 if (rgd->rd_list.next == &rgd->rd_sbd->sd_rindex_list)
368 return NULL;
369 return list_entry(rgd->rd_list.next, struct gfs2_rgrpd, rd_list);
370}
371
372static void clear_rgrpdi(struct gfs2_sbd *sdp)
373{
374 struct list_head *head;
375 struct gfs2_rgrpd *rgd;
376 struct gfs2_glock *gl;
377
378 spin_lock(&sdp->sd_rindex_spin);
379 sdp->sd_rindex_forward = NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000380 spin_unlock(&sdp->sd_rindex_spin);
381
382 head = &sdp->sd_rindex_list;
383 while (!list_empty(head)) {
384 rgd = list_entry(head->next, struct gfs2_rgrpd, rd_list);
385 gl = rgd->rd_gl;
386
387 list_del(&rgd->rd_list);
388 list_del(&rgd->rd_list_mru);
389
390 if (gl) {
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500391 gl->gl_object = NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000392 gfs2_glock_put(gl);
393 }
394
395 kfree(rgd->rd_bits);
Bob Peterson6bdd9be2008-01-28 17:20:26 -0600396 kmem_cache_free(gfs2_rgrpd_cachep, rgd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000397 }
398}
399
400void gfs2_clear_rgrpd(struct gfs2_sbd *sdp)
401{
Steven Whitehousef55ab262006-02-21 12:51:39 +0000402 mutex_lock(&sdp->sd_rindex_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000403 clear_rgrpdi(sdp);
Steven Whitehousef55ab262006-02-21 12:51:39 +0000404 mutex_unlock(&sdp->sd_rindex_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000405}
406
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100407static void gfs2_rindex_print(const struct gfs2_rgrpd *rgd)
408{
409 printk(KERN_INFO " ri_addr = %llu\n", (unsigned long long)rgd->rd_addr);
410 printk(KERN_INFO " ri_length = %u\n", rgd->rd_length);
411 printk(KERN_INFO " ri_data0 = %llu\n", (unsigned long long)rgd->rd_data0);
412 printk(KERN_INFO " ri_data = %u\n", rgd->rd_data);
413 printk(KERN_INFO " ri_bitbytes = %u\n", rgd->rd_bitbytes);
414}
415
David Teiglandb3b94fa2006-01-16 16:50:04 +0000416/**
417 * gfs2_compute_bitstructs - Compute the bitmap sizes
418 * @rgd: The resource group descriptor
419 *
420 * Calculates bitmap descriptors, one for each block that contains bitmap data
421 *
422 * Returns: errno
423 */
424
425static int compute_bitstructs(struct gfs2_rgrpd *rgd)
426{
427 struct gfs2_sbd *sdp = rgd->rd_sbd;
428 struct gfs2_bitmap *bi;
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100429 u32 length = rgd->rd_length; /* # blocks in hdr & bitmap */
Steven Whitehousecd915492006-09-04 12:49:07 -0400430 u32 bytes_left, bytes;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000431 int x;
432
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400433 if (!length)
434 return -EINVAL;
435
Steven Whitehousedd894be2006-07-27 14:29:00 -0400436 rgd->rd_bits = kcalloc(length, sizeof(struct gfs2_bitmap), GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000437 if (!rgd->rd_bits)
438 return -ENOMEM;
439
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100440 bytes_left = rgd->rd_bitbytes;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000441
442 for (x = 0; x < length; x++) {
443 bi = rgd->rd_bits + x;
444
445 /* small rgrp; bitmap stored completely in header block */
446 if (length == 1) {
447 bytes = bytes_left;
448 bi->bi_offset = sizeof(struct gfs2_rgrp);
449 bi->bi_start = 0;
450 bi->bi_len = bytes;
451 /* header block */
452 } else if (x == 0) {
453 bytes = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_rgrp);
454 bi->bi_offset = sizeof(struct gfs2_rgrp);
455 bi->bi_start = 0;
456 bi->bi_len = bytes;
457 /* last block */
458 } else if (x + 1 == length) {
459 bytes = bytes_left;
460 bi->bi_offset = sizeof(struct gfs2_meta_header);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100461 bi->bi_start = rgd->rd_bitbytes - bytes_left;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000462 bi->bi_len = bytes;
463 /* other blocks */
464 } else {
Steven Whitehouse568f4c92006-02-27 12:00:42 -0500465 bytes = sdp->sd_sb.sb_bsize -
466 sizeof(struct gfs2_meta_header);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000467 bi->bi_offset = sizeof(struct gfs2_meta_header);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100468 bi->bi_start = rgd->rd_bitbytes - bytes_left;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000469 bi->bi_len = bytes;
470 }
471
472 bytes_left -= bytes;
473 }
474
475 if (bytes_left) {
476 gfs2_consist_rgrpd(rgd);
477 return -EIO;
478 }
479 bi = rgd->rd_bits + (length - 1);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100480 if ((bi->bi_start + bi->bi_len) * GFS2_NBBY != rgd->rd_data) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000481 if (gfs2_consist_rgrpd(rgd)) {
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100482 gfs2_rindex_print(rgd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000483 fs_err(sdp, "start=%u len=%u offset=%u\n",
484 bi->bi_start, bi->bi_len, bi->bi_offset);
485 }
486 return -EIO;
487 }
488
489 return 0;
490}
491
492/**
Robert Peterson7ae8fa82007-05-09 09:37:57 -0500493 * gfs2_ri_total - Total up the file system space, according to the rindex.
494 *
495 */
496u64 gfs2_ri_total(struct gfs2_sbd *sdp)
497{
498 u64 total_data = 0;
499 struct inode *inode = sdp->sd_rindex;
500 struct gfs2_inode *ip = GFS2_I(inode);
Robert Peterson7ae8fa82007-05-09 09:37:57 -0500501 char buf[sizeof(struct gfs2_rindex)];
502 struct file_ra_state ra_state;
503 int error, rgrps;
504
505 mutex_lock(&sdp->sd_rindex_mutex);
506 file_ra_state_init(&ra_state, inode->i_mapping);
507 for (rgrps = 0;; rgrps++) {
508 loff_t pos = rgrps * sizeof(struct gfs2_rindex);
509
Steven Whitehousec9e98882008-11-04 09:47:33 +0000510 if (pos + sizeof(struct gfs2_rindex) >= ip->i_disksize)
Robert Peterson7ae8fa82007-05-09 09:37:57 -0500511 break;
512 error = gfs2_internal_read(ip, &ra_state, buf, &pos,
513 sizeof(struct gfs2_rindex));
514 if (error != sizeof(struct gfs2_rindex))
515 break;
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100516 total_data += be32_to_cpu(((struct gfs2_rindex *)buf)->ri_data);
Robert Peterson7ae8fa82007-05-09 09:37:57 -0500517 }
518 mutex_unlock(&sdp->sd_rindex_mutex);
519 return total_data;
520}
521
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100522static void gfs2_rindex_in(struct gfs2_rgrpd *rgd, const void *buf)
523{
524 const struct gfs2_rindex *str = buf;
525
526 rgd->rd_addr = be64_to_cpu(str->ri_addr);
527 rgd->rd_length = be32_to_cpu(str->ri_length);
528 rgd->rd_data0 = be64_to_cpu(str->ri_data0);
529 rgd->rd_data = be32_to_cpu(str->ri_data);
530 rgd->rd_bitbytes = be32_to_cpu(str->ri_bitbytes);
531}
532
Robert Peterson7ae8fa82007-05-09 09:37:57 -0500533/**
Robert Peterson6c532672007-05-10 16:54:38 -0500534 * read_rindex_entry - Pull in a new resource index entry from the disk
David Teiglandb3b94fa2006-01-16 16:50:04 +0000535 * @gl: The glock covering the rindex inode
536 *
Robert Peterson6c532672007-05-10 16:54:38 -0500537 * Returns: 0 on success, error code otherwise
538 */
539
540static int read_rindex_entry(struct gfs2_inode *ip,
541 struct file_ra_state *ra_state)
542{
543 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
544 loff_t pos = sdp->sd_rgrps * sizeof(struct gfs2_rindex);
545 char buf[sizeof(struct gfs2_rindex)];
546 int error;
547 struct gfs2_rgrpd *rgd;
548
549 error = gfs2_internal_read(ip, ra_state, buf, &pos,
550 sizeof(struct gfs2_rindex));
551 if (!error)
552 return 0;
553 if (error != sizeof(struct gfs2_rindex)) {
554 if (error > 0)
555 error = -EIO;
556 return error;
557 }
558
Bob Peterson6bdd9be2008-01-28 17:20:26 -0600559 rgd = kmem_cache_zalloc(gfs2_rgrpd_cachep, GFP_NOFS);
Robert Peterson6c532672007-05-10 16:54:38 -0500560 error = -ENOMEM;
561 if (!rgd)
562 return error;
563
564 mutex_init(&rgd->rd_mutex);
565 lops_init_le(&rgd->rd_le, &gfs2_rg_lops);
566 rgd->rd_sbd = sdp;
567
568 list_add_tail(&rgd->rd_list, &sdp->sd_rindex_list);
569 list_add_tail(&rgd->rd_list_mru, &sdp->sd_rindex_mru_list);
570
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100571 gfs2_rindex_in(rgd, buf);
Robert Peterson6c532672007-05-10 16:54:38 -0500572 error = compute_bitstructs(rgd);
573 if (error)
574 return error;
575
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100576 error = gfs2_glock_get(sdp, rgd->rd_addr,
Robert Peterson6c532672007-05-10 16:54:38 -0500577 &gfs2_rgrp_glops, CREATE, &rgd->rd_gl);
578 if (error)
579 return error;
580
581 rgd->rd_gl->gl_object = rgd;
Bob Petersoncf45b752008-01-31 10:31:39 -0600582 rgd->rd_flags &= ~GFS2_RDF_UPTODATE;
Steven Whitehousec8cdf472007-06-08 10:05:33 +0100583 rgd->rd_flags |= GFS2_RDF_CHECK;
Robert Peterson6c532672007-05-10 16:54:38 -0500584 return error;
585}
586
587/**
588 * gfs2_ri_update - Pull in a new resource index from the disk
589 * @ip: pointer to the rindex inode
590 *
David Teiglandb3b94fa2006-01-16 16:50:04 +0000591 * Returns: 0 on successful update, error code otherwise
592 */
593
594static int gfs2_ri_update(struct gfs2_inode *ip)
595{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400596 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
597 struct inode *inode = &ip->i_inode;
Steven Whitehousef42faf42006-01-30 18:34:10 +0000598 struct file_ra_state ra_state;
Steven Whitehousec9e98882008-11-04 09:47:33 +0000599 u64 rgrp_count = ip->i_disksize;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000600 int error;
601
Robert Petersoncd81a4b2007-05-14 12:42:18 -0500602 if (do_div(rgrp_count, sizeof(struct gfs2_rindex))) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000603 gfs2_consist_inode(ip);
604 return -EIO;
605 }
606
607 clear_rgrpdi(sdp);
608
Steven Whitehousef42faf42006-01-30 18:34:10 +0000609 file_ra_state_init(&ra_state, inode->i_mapping);
Robert Petersoncd81a4b2007-05-14 12:42:18 -0500610 for (sdp->sd_rgrps = 0; sdp->sd_rgrps < rgrp_count; sdp->sd_rgrps++) {
Robert Peterson6c532672007-05-10 16:54:38 -0500611 error = read_rindex_entry(ip, &ra_state);
612 if (error) {
613 clear_rgrpdi(sdp);
614 return error;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000615 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000616 }
617
Bob Petersoncf45b752008-01-31 10:31:39 -0600618 sdp->sd_rindex_uptodate = 1;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000619 return 0;
Robert Peterson6c532672007-05-10 16:54:38 -0500620}
David Teiglandb3b94fa2006-01-16 16:50:04 +0000621
Robert Peterson6c532672007-05-10 16:54:38 -0500622/**
623 * gfs2_ri_update_special - Pull in a new resource index from the disk
624 *
625 * This is a special version that's safe to call from gfs2_inplace_reserve_i.
626 * In this case we know that we don't have any resource groups in memory yet.
627 *
628 * @ip: pointer to the rindex inode
629 *
630 * Returns: 0 on successful update, error code otherwise
631 */
632static int gfs2_ri_update_special(struct gfs2_inode *ip)
633{
634 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
635 struct inode *inode = &ip->i_inode;
636 struct file_ra_state ra_state;
637 int error;
638
639 file_ra_state_init(&ra_state, inode->i_mapping);
640 for (sdp->sd_rgrps = 0;; sdp->sd_rgrps++) {
641 /* Ignore partials */
642 if ((sdp->sd_rgrps + 1) * sizeof(struct gfs2_rindex) >
Steven Whitehousec9e98882008-11-04 09:47:33 +0000643 ip->i_disksize)
Robert Peterson6c532672007-05-10 16:54:38 -0500644 break;
645 error = read_rindex_entry(ip, &ra_state);
646 if (error) {
647 clear_rgrpdi(sdp);
648 return error;
649 }
650 }
651
Bob Petersoncf45b752008-01-31 10:31:39 -0600652 sdp->sd_rindex_uptodate = 1;
Robert Peterson6c532672007-05-10 16:54:38 -0500653 return 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000654}
655
656/**
657 * gfs2_rindex_hold - Grab a lock on the rindex
658 * @sdp: The GFS2 superblock
659 * @ri_gh: the glock holder
660 *
661 * We grab a lock on the rindex inode to make sure that it doesn't
662 * change whilst we are performing an operation. We keep this lock
663 * for quite long periods of time compared to other locks. This
664 * doesn't matter, since it is shared and it is very, very rarely
665 * accessed in the exclusive mode (i.e. only when expanding the filesystem).
666 *
667 * This makes sure that we're using the latest copy of the resource index
668 * special file, which might have been updated if someone expanded the
669 * filesystem (via gfs2_grow utility), which adds new resource groups.
670 *
671 * Returns: 0 on success, error code otherwise
672 */
673
674int gfs2_rindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ri_gh)
675{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400676 struct gfs2_inode *ip = GFS2_I(sdp->sd_rindex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000677 struct gfs2_glock *gl = ip->i_gl;
678 int error;
679
680 error = gfs2_glock_nq_init(gl, LM_ST_SHARED, 0, ri_gh);
681 if (error)
682 return error;
683
684 /* Read new copy from disk if we don't have the latest */
Bob Petersoncf45b752008-01-31 10:31:39 -0600685 if (!sdp->sd_rindex_uptodate) {
Steven Whitehousef55ab262006-02-21 12:51:39 +0000686 mutex_lock(&sdp->sd_rindex_mutex);
Bob Petersoncf45b752008-01-31 10:31:39 -0600687 if (!sdp->sd_rindex_uptodate) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000688 error = gfs2_ri_update(ip);
689 if (error)
690 gfs2_glock_dq_uninit(ri_gh);
691 }
Steven Whitehousef55ab262006-02-21 12:51:39 +0000692 mutex_unlock(&sdp->sd_rindex_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000693 }
694
695 return error;
696}
697
Bob Peterson42d52e32008-01-28 18:38:07 -0600698static void gfs2_rgrp_in(struct gfs2_rgrpd *rgd, const void *buf)
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100699{
700 const struct gfs2_rgrp *str = buf;
Bob Peterson42d52e32008-01-28 18:38:07 -0600701 u32 rg_flags;
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100702
Bob Peterson42d52e32008-01-28 18:38:07 -0600703 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;
Steven Whitehousecfc8b542008-11-04 10:25:13 +0000708 rgd->rd_free = be32_to_cpu(str->rg_free);
Steven Whitehouse73f74942008-11-04 10:32:57 +0000709 rgd->rd_dinodes = be32_to_cpu(str->rg_dinodes);
Steven Whitehoused8b71f72008-11-04 10:19:03 +0000710 rgd->rd_igeneration = be64_to_cpu(str->rg_igeneration);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100711}
712
Bob Peterson42d52e32008-01-28 18:38:07 -0600713static void gfs2_rgrp_out(struct gfs2_rgrpd *rgd, void *buf)
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100714{
715 struct gfs2_rgrp *str = buf;
Bob Peterson42d52e32008-01-28 18:38:07 -0600716 u32 rg_flags = 0;
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100717
Bob Peterson42d52e32008-01-28 18:38:07 -0600718 if (rgd->rd_flags & GFS2_RDF_NOALLOC)
719 rg_flags |= GFS2_RGF_NOALLOC;
720 str->rg_flags = cpu_to_be32(rg_flags);
Steven Whitehousecfc8b542008-11-04 10:25:13 +0000721 str->rg_free = cpu_to_be32(rgd->rd_free);
Steven Whitehouse73f74942008-11-04 10:32:57 +0000722 str->rg_dinodes = cpu_to_be32(rgd->rd_dinodes);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100723 str->__pad = cpu_to_be32(0);
Steven Whitehoused8b71f72008-11-04 10:19:03 +0000724 str->rg_igeneration = cpu_to_be64(rgd->rd_igeneration);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100725 memset(&str->rg_reserved, 0, sizeof(str->rg_reserved));
726}
727
David Teiglandb3b94fa2006-01-16 16:50:04 +0000728/**
729 * gfs2_rgrp_bh_get - Read in a RG's header and bitmaps
730 * @rgd: the struct gfs2_rgrpd describing the RG to read in
731 *
732 * Read in all of a Resource Group's header and bitmap blocks.
733 * Caller must eventually call gfs2_rgrp_relse() to free the bitmaps.
734 *
735 * Returns: errno
736 */
737
738int gfs2_rgrp_bh_get(struct gfs2_rgrpd *rgd)
739{
740 struct gfs2_sbd *sdp = rgd->rd_sbd;
741 struct gfs2_glock *gl = rgd->rd_gl;
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100742 unsigned int length = rgd->rd_length;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000743 struct gfs2_bitmap *bi;
744 unsigned int x, y;
745 int error;
746
Steven Whitehousef55ab262006-02-21 12:51:39 +0000747 mutex_lock(&rgd->rd_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000748
749 spin_lock(&sdp->sd_rindex_spin);
750 if (rgd->rd_bh_count) {
751 rgd->rd_bh_count++;
752 spin_unlock(&sdp->sd_rindex_spin);
Steven Whitehousef55ab262006-02-21 12:51:39 +0000753 mutex_unlock(&rgd->rd_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000754 return 0;
755 }
756 spin_unlock(&sdp->sd_rindex_spin);
757
758 for (x = 0; x < length; x++) {
759 bi = rgd->rd_bits + x;
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100760 error = gfs2_meta_read(gl, rgd->rd_addr + x, 0, &bi->bi_bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000761 if (error)
762 goto fail;
763 }
764
765 for (y = length; y--;) {
766 bi = rgd->rd_bits + y;
Steven Whitehouse7276b3b2006-09-21 17:05:23 -0400767 error = gfs2_meta_wait(sdp, bi->bi_bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000768 if (error)
769 goto fail;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400770 if (gfs2_metatype_check(sdp, bi->bi_bh, y ? GFS2_METATYPE_RB :
David Teiglandb3b94fa2006-01-16 16:50:04 +0000771 GFS2_METATYPE_RG)) {
772 error = -EIO;
773 goto fail;
774 }
775 }
776
Bob Petersoncf45b752008-01-31 10:31:39 -0600777 if (!(rgd->rd_flags & GFS2_RDF_UPTODATE)) {
Bob Peterson42d52e32008-01-28 18:38:07 -0600778 gfs2_rgrp_in(rgd, (rgd->rd_bits[0].bi_bh)->b_data);
Bob Petersoncf45b752008-01-31 10:31:39 -0600779 rgd->rd_flags |= GFS2_RDF_UPTODATE;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000780 }
781
782 spin_lock(&sdp->sd_rindex_spin);
Steven Whitehousecfc8b542008-11-04 10:25:13 +0000783 rgd->rd_free_clone = rgd->rd_free;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000784 rgd->rd_bh_count++;
785 spin_unlock(&sdp->sd_rindex_spin);
786
Steven Whitehousef55ab262006-02-21 12:51:39 +0000787 mutex_unlock(&rgd->rd_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000788
789 return 0;
790
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400791fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000792 while (x--) {
793 bi = rgd->rd_bits + x;
794 brelse(bi->bi_bh);
795 bi->bi_bh = NULL;
796 gfs2_assert_warn(sdp, !bi->bi_clone);
797 }
Steven Whitehousef55ab262006-02-21 12:51:39 +0000798 mutex_unlock(&rgd->rd_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000799
800 return error;
801}
802
803void gfs2_rgrp_bh_hold(struct gfs2_rgrpd *rgd)
804{
805 struct gfs2_sbd *sdp = rgd->rd_sbd;
806
807 spin_lock(&sdp->sd_rindex_spin);
808 gfs2_assert_warn(rgd->rd_sbd, rgd->rd_bh_count);
809 rgd->rd_bh_count++;
810 spin_unlock(&sdp->sd_rindex_spin);
811}
812
813/**
814 * gfs2_rgrp_bh_put - Release RG bitmaps read in with gfs2_rgrp_bh_get()
815 * @rgd: the struct gfs2_rgrpd describing the RG to read in
816 *
817 */
818
819void gfs2_rgrp_bh_put(struct gfs2_rgrpd *rgd)
820{
821 struct gfs2_sbd *sdp = rgd->rd_sbd;
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100822 int x, length = rgd->rd_length;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000823
824 spin_lock(&sdp->sd_rindex_spin);
825 gfs2_assert_warn(rgd->rd_sbd, rgd->rd_bh_count);
826 if (--rgd->rd_bh_count) {
827 spin_unlock(&sdp->sd_rindex_spin);
828 return;
829 }
830
831 for (x = 0; x < length; x++) {
832 struct gfs2_bitmap *bi = rgd->rd_bits + x;
833 kfree(bi->bi_clone);
834 bi->bi_clone = NULL;
835 brelse(bi->bi_bh);
836 bi->bi_bh = NULL;
837 }
838
839 spin_unlock(&sdp->sd_rindex_spin);
840}
841
Steven Whitehousef15ab562009-02-09 09:25:01 +0000842static void gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset,
843 const struct gfs2_bitmap *bi)
844{
845 struct super_block *sb = sdp->sd_vfs;
846 struct block_device *bdev = sb->s_bdev;
847 const unsigned int sects_per_blk = sdp->sd_sb.sb_bsize /
848 bdev_hardsect_size(sb->s_bdev);
849 u64 blk;
Steven Whitehouse64d576b2009-02-12 13:31:58 +0000850 sector_t start = 0;
Steven Whitehousef15ab562009-02-09 09:25:01 +0000851 sector_t nr_sects = 0;
852 int rv;
853 unsigned int x;
854
855 for (x = 0; x < bi->bi_len; x++) {
856 const u8 *orig = bi->bi_bh->b_data + bi->bi_offset + x;
857 const u8 *clone = bi->bi_clone + bi->bi_offset + x;
858 u8 diff = ~(*orig | (*orig >> 1)) & (*clone | (*clone >> 1));
859 diff &= 0x55;
860 if (diff == 0)
861 continue;
862 blk = offset + ((bi->bi_start + x) * GFS2_NBBY);
863 blk *= sects_per_blk; /* convert to sectors */
864 while(diff) {
865 if (diff & 1) {
866 if (nr_sects == 0)
867 goto start_new_extent;
868 if ((start + nr_sects) != blk) {
869 rv = blkdev_issue_discard(bdev, start,
870 nr_sects, GFP_NOFS);
871 if (rv)
872 goto fail;
873 nr_sects = 0;
874start_new_extent:
875 start = blk;
876 }
877 nr_sects += sects_per_blk;
878 }
879 diff >>= 2;
880 blk += sects_per_blk;
881 }
882 }
883 if (nr_sects) {
884 rv = blkdev_issue_discard(bdev, start, nr_sects, GFP_NOFS);
885 if (rv)
886 goto fail;
887 }
888 return;
889fail:
890 fs_warn(sdp, "error %d on discard request, turning discards off for this filesystem", rv);
891 sdp->sd_args.ar_discard = 0;
892}
893
David Teiglandb3b94fa2006-01-16 16:50:04 +0000894void gfs2_rgrp_repolish_clones(struct gfs2_rgrpd *rgd)
895{
896 struct gfs2_sbd *sdp = rgd->rd_sbd;
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100897 unsigned int length = rgd->rd_length;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000898 unsigned int x;
899
900 for (x = 0; x < length; x++) {
901 struct gfs2_bitmap *bi = rgd->rd_bits + x;
902 if (!bi->bi_clone)
903 continue;
Steven Whitehousef15ab562009-02-09 09:25:01 +0000904 if (sdp->sd_args.ar_discard)
905 gfs2_rgrp_send_discards(sdp, rgd->rd_data0, bi);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000906 memcpy(bi->bi_clone + bi->bi_offset,
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400907 bi->bi_bh->b_data + bi->bi_offset, bi->bi_len);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000908 }
909
910 spin_lock(&sdp->sd_rindex_spin);
Steven Whitehousecfc8b542008-11-04 10:25:13 +0000911 rgd->rd_free_clone = rgd->rd_free;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000912 spin_unlock(&sdp->sd_rindex_spin);
913}
914
915/**
916 * gfs2_alloc_get - get the struct gfs2_alloc structure for an inode
917 * @ip: the incore GFS2 inode structure
918 *
919 * Returns: the struct gfs2_alloc
920 */
921
922struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip)
923{
Steven Whitehouse6dbd8222008-01-10 15:18:55 +0000924 BUG_ON(ip->i_alloc != NULL);
925 ip->i_alloc = kzalloc(sizeof(struct gfs2_alloc), GFP_KERNEL);
926 return ip->i_alloc;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000927}
928
929/**
David Teiglandb3b94fa2006-01-16 16:50:04 +0000930 * try_rgrp_fit - See if a given reservation will fit in a given RG
931 * @rgd: the RG data
932 * @al: the struct gfs2_alloc structure describing the reservation
933 *
934 * If there's room for the requested blocks to be allocated from the RG:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000935 * Sets the $al_rgd field in @al.
936 *
937 * Returns: 1 on success (it fits), 0 on failure (it doesn't fit)
938 */
939
940static int try_rgrp_fit(struct gfs2_rgrpd *rgd, struct gfs2_alloc *al)
941{
942 struct gfs2_sbd *sdp = rgd->rd_sbd;
943 int ret = 0;
944
Bob Peterson42d52e32008-01-28 18:38:07 -0600945 if (rgd->rd_flags & GFS2_RDF_NOALLOC)
Steven Whitehousea43a4902007-04-02 10:48:17 +0100946 return 0;
947
David Teiglandb3b94fa2006-01-16 16:50:04 +0000948 spin_lock(&sdp->sd_rindex_spin);
949 if (rgd->rd_free_clone >= al->al_requested) {
950 al->al_rgd = rgd;
951 ret = 1;
952 }
953 spin_unlock(&sdp->sd_rindex_spin);
954
955 return ret;
956}
957
958/**
Steven Whitehousec8cdf472007-06-08 10:05:33 +0100959 * try_rgrp_unlink - Look for any unlinked, allocated, but unused inodes
960 * @rgd: The rgrp
961 *
962 * Returns: The inode, if one has been found
963 */
964
965static struct inode *try_rgrp_unlink(struct gfs2_rgrpd *rgd, u64 *last_unlinked)
966{
967 struct inode *inode;
Bob Peterson6760bdc2007-07-24 14:09:32 -0500968 u32 goal = 0, block;
Wendy Chengbb9bcf02007-06-27 17:07:08 -0400969 u64 no_addr;
Bob Peterson5f3eae72007-08-08 16:52:09 -0500970 struct gfs2_sbd *sdp = rgd->rd_sbd;
Steven Whitehouseb45e41d2008-02-06 10:11:15 +0000971 unsigned int n;
Steven Whitehousec8cdf472007-06-08 10:05:33 +0100972
973 for(;;) {
Bob Peterson24c73872007-07-12 16:58:50 -0500974 if (goal >= rgd->rd_data)
975 break;
Bob Peterson5f3eae72007-08-08 16:52:09 -0500976 down_write(&sdp->sd_log_flush_lock);
Steven Whitehouseb45e41d2008-02-06 10:11:15 +0000977 n = 1;
Bob Peterson6760bdc2007-07-24 14:09:32 -0500978 block = rgblk_search(rgd, goal, GFS2_BLKST_UNLINKED,
Steven Whitehouseb45e41d2008-02-06 10:11:15 +0000979 GFS2_BLKST_UNLINKED, &n);
Bob Peterson5f3eae72007-08-08 16:52:09 -0500980 up_write(&sdp->sd_log_flush_lock);
Bob Peterson6760bdc2007-07-24 14:09:32 -0500981 if (block == BFITNOENT)
Bob Peterson24c73872007-07-12 16:58:50 -0500982 break;
Bob Peterson6760bdc2007-07-24 14:09:32 -0500983 /* rgblk_search can return a block < goal, so we need to
984 keep it marching forward. */
985 no_addr = block + rgd->rd_data0;
Bob Peterson24c73872007-07-12 16:58:50 -0500986 goal++;
Bob Peterson6760bdc2007-07-24 14:09:32 -0500987 if (*last_unlinked != NO_BLOCK && no_addr <= *last_unlinked)
Steven Whitehousec8cdf472007-06-08 10:05:33 +0100988 continue;
Wendy Chengbb9bcf02007-06-27 17:07:08 -0400989 *last_unlinked = no_addr;
990 inode = gfs2_inode_lookup(rgd->rd_sbd->sd_vfs, DT_UNKNOWN,
Benjamin Marzinski7a9f53b2007-09-18 13:33:18 -0500991 no_addr, -1, 1);
Steven Whitehousec8cdf472007-06-08 10:05:33 +0100992 if (!IS_ERR(inode))
993 return inode;
994 }
995
996 rgd->rd_flags &= ~GFS2_RDF_CHECK;
997 return NULL;
998}
999
1000/**
David Teiglandb3b94fa2006-01-16 16:50:04 +00001001 * recent_rgrp_next - get next RG from "recent" list
1002 * @cur_rgd: current rgrp
David Teiglandb3b94fa2006-01-16 16:50:04 +00001003 *
1004 * Returns: The next rgrp in the recent list
1005 */
1006
Steven Whitehouse9cabcdb2008-07-10 15:54:12 +01001007static struct gfs2_rgrpd *recent_rgrp_next(struct gfs2_rgrpd *cur_rgd)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001008{
1009 struct gfs2_sbd *sdp = cur_rgd->rd_sbd;
1010 struct list_head *head;
1011 struct gfs2_rgrpd *rgd;
1012
1013 spin_lock(&sdp->sd_rindex_spin);
Steven Whitehouse9cabcdb2008-07-10 15:54:12 +01001014 head = &sdp->sd_rindex_mru_list;
1015 if (unlikely(cur_rgd->rd_list_mru.next == head)) {
1016 spin_unlock(&sdp->sd_rindex_spin);
1017 return NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001018 }
Steven Whitehouse9cabcdb2008-07-10 15:54:12 +01001019 rgd = list_entry(cur_rgd->rd_list_mru.next, struct gfs2_rgrpd, rd_list_mru);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001020 spin_unlock(&sdp->sd_rindex_spin);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001021 return rgd;
1022}
1023
1024/**
David Teiglandb3b94fa2006-01-16 16:50:04 +00001025 * forward_rgrp_get - get an rgrp to try next from full list
1026 * @sdp: The GFS2 superblock
1027 *
1028 * Returns: The rgrp to try next
1029 */
1030
1031static struct gfs2_rgrpd *forward_rgrp_get(struct gfs2_sbd *sdp)
1032{
1033 struct gfs2_rgrpd *rgd;
1034 unsigned int journals = gfs2_jindex_size(sdp);
1035 unsigned int rg = 0, x;
1036
1037 spin_lock(&sdp->sd_rindex_spin);
1038
1039 rgd = sdp->sd_rindex_forward;
1040 if (!rgd) {
1041 if (sdp->sd_rgrps >= journals)
1042 rg = sdp->sd_rgrps * sdp->sd_jdesc->jd_jid / journals;
1043
Steven Whitehouseb8e1aab2006-08-22 16:25:50 -04001044 for (x = 0, rgd = gfs2_rgrpd_get_first(sdp); x < rg;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001045 x++, rgd = gfs2_rgrpd_get_next(rgd))
1046 /* Do Nothing */;
1047
1048 sdp->sd_rindex_forward = rgd;
1049 }
1050
1051 spin_unlock(&sdp->sd_rindex_spin);
1052
1053 return rgd;
1054}
1055
1056/**
1057 * forward_rgrp_set - set the forward rgrp pointer
1058 * @sdp: the filesystem
1059 * @rgd: The new forward rgrp
1060 *
1061 */
1062
1063static void forward_rgrp_set(struct gfs2_sbd *sdp, struct gfs2_rgrpd *rgd)
1064{
1065 spin_lock(&sdp->sd_rindex_spin);
1066 sdp->sd_rindex_forward = rgd;
1067 spin_unlock(&sdp->sd_rindex_spin);
1068}
1069
1070/**
1071 * get_local_rgrp - Choose and lock a rgrp for allocation
1072 * @ip: the inode to reserve space for
1073 * @rgp: the chosen and locked rgrp
1074 *
1075 * Try to acquire rgrp in way which avoids contending with others.
1076 *
1077 * Returns: errno
1078 */
1079
Steven Whitehousec8cdf472007-06-08 10:05:33 +01001080static struct inode *get_local_rgrp(struct gfs2_inode *ip, u64 *last_unlinked)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001081{
Steven Whitehousec8cdf472007-06-08 10:05:33 +01001082 struct inode *inode = NULL;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001083 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001084 struct gfs2_rgrpd *rgd, *begin = NULL;
Steven Whitehouse6dbd8222008-01-10 15:18:55 +00001085 struct gfs2_alloc *al = ip->i_alloc;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001086 int flags = LM_FLAG_TRY;
1087 int skipped = 0;
1088 int loops = 0;
Abhijith Das292c8c12007-11-29 14:13:54 -06001089 int error, rg_locked;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001090
Steven Whitehouse9cabcdb2008-07-10 15:54:12 +01001091 rgd = gfs2_blk2rgrpd(sdp, ip->i_goal);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001092
1093 while (rgd) {
Abhijith Das292c8c12007-11-29 14:13:54 -06001094 rg_locked = 0;
1095
1096 if (gfs2_glock_is_locked_by_me(rgd->rd_gl)) {
1097 rg_locked = 1;
1098 error = 0;
1099 } else {
1100 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE,
1101 LM_FLAG_TRY, &al->al_rgd_gh);
1102 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001103 switch (error) {
1104 case 0:
1105 if (try_rgrp_fit(rgd, al))
1106 goto out;
Steven Whitehousec8cdf472007-06-08 10:05:33 +01001107 if (rgd->rd_flags & GFS2_RDF_CHECK)
1108 inode = try_rgrp_unlink(rgd, last_unlinked);
Abhijith Das292c8c12007-11-29 14:13:54 -06001109 if (!rg_locked)
1110 gfs2_glock_dq_uninit(&al->al_rgd_gh);
Steven Whitehousec8cdf472007-06-08 10:05:33 +01001111 if (inode)
1112 return inode;
Steven Whitehouse9cabcdb2008-07-10 15:54:12 +01001113 /* fall through */
David Teiglandb3b94fa2006-01-16 16:50:04 +00001114 case GLR_TRYFAILED:
Steven Whitehouse9cabcdb2008-07-10 15:54:12 +01001115 rgd = recent_rgrp_next(rgd);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001116 break;
1117
1118 default:
Steven Whitehousec8cdf472007-06-08 10:05:33 +01001119 return ERR_PTR(error);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001120 }
1121 }
1122
1123 /* Go through full list of rgrps */
1124
1125 begin = rgd = forward_rgrp_get(sdp);
1126
1127 for (;;) {
Abhijith Das292c8c12007-11-29 14:13:54 -06001128 rg_locked = 0;
1129
1130 if (gfs2_glock_is_locked_by_me(rgd->rd_gl)) {
1131 rg_locked = 1;
1132 error = 0;
1133 } else {
1134 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, flags,
1135 &al->al_rgd_gh);
1136 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001137 switch (error) {
1138 case 0:
1139 if (try_rgrp_fit(rgd, al))
1140 goto out;
Steven Whitehousec8cdf472007-06-08 10:05:33 +01001141 if (rgd->rd_flags & GFS2_RDF_CHECK)
1142 inode = try_rgrp_unlink(rgd, last_unlinked);
Abhijith Das292c8c12007-11-29 14:13:54 -06001143 if (!rg_locked)
1144 gfs2_glock_dq_uninit(&al->al_rgd_gh);
Steven Whitehousec8cdf472007-06-08 10:05:33 +01001145 if (inode)
1146 return inode;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001147 break;
1148
1149 case GLR_TRYFAILED:
1150 skipped++;
1151 break;
1152
1153 default:
Steven Whitehousec8cdf472007-06-08 10:05:33 +01001154 return ERR_PTR(error);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001155 }
1156
1157 rgd = gfs2_rgrpd_get_next(rgd);
1158 if (!rgd)
1159 rgd = gfs2_rgrpd_get_first(sdp);
1160
1161 if (rgd == begin) {
Benjamin Marzinski172e0452007-03-23 14:51:56 -06001162 if (++loops >= 3)
Steven Whitehousec8cdf472007-06-08 10:05:33 +01001163 return ERR_PTR(-ENOSPC);
Benjamin Marzinski172e0452007-03-23 14:51:56 -06001164 if (!skipped)
1165 loops++;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001166 flags = 0;
Benjamin Marzinski172e0452007-03-23 14:51:56 -06001167 if (loops == 2)
1168 gfs2_log_flush(sdp, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001169 }
1170 }
1171
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001172out:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001173 if (begin) {
Steven Whitehouse9cabcdb2008-07-10 15:54:12 +01001174 spin_lock(&sdp->sd_rindex_spin);
1175 list_move(&rgd->rd_list_mru, &sdp->sd_rindex_mru_list);
1176 spin_unlock(&sdp->sd_rindex_spin);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001177 rgd = gfs2_rgrpd_get_next(rgd);
1178 if (!rgd)
1179 rgd = gfs2_rgrpd_get_first(sdp);
1180 forward_rgrp_set(sdp, rgd);
1181 }
1182
Steven Whitehousec8cdf472007-06-08 10:05:33 +01001183 return NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001184}
1185
1186/**
1187 * gfs2_inplace_reserve_i - Reserve space in the filesystem
1188 * @ip: the inode to reserve space for
1189 *
1190 * Returns: errno
1191 */
1192
1193int gfs2_inplace_reserve_i(struct gfs2_inode *ip, char *file, unsigned int line)
1194{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001195 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Steven Whitehouse6dbd8222008-01-10 15:18:55 +00001196 struct gfs2_alloc *al = ip->i_alloc;
Steven Whitehousec8cdf472007-06-08 10:05:33 +01001197 struct inode *inode;
Robert Peterson7ae8fa82007-05-09 09:37:57 -05001198 int error = 0;
Bob Peterson6760bdc2007-07-24 14:09:32 -05001199 u64 last_unlinked = NO_BLOCK;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001200
1201 if (gfs2_assert_warn(sdp, al->al_requested))
1202 return -EINVAL;
1203
Steven Whitehousec8cdf472007-06-08 10:05:33 +01001204try_again:
Robert Peterson7ae8fa82007-05-09 09:37:57 -05001205 /* We need to hold the rindex unless the inode we're using is
1206 the rindex itself, in which case it's already held. */
1207 if (ip != GFS2_I(sdp->sd_rindex))
1208 error = gfs2_rindex_hold(sdp, &al->al_ri_gh);
1209 else if (!sdp->sd_rgrps) /* We may not have the rindex read in, so: */
Robert Peterson6c532672007-05-10 16:54:38 -05001210 error = gfs2_ri_update_special(ip);
Robert Peterson7ae8fa82007-05-09 09:37:57 -05001211
David Teiglandb3b94fa2006-01-16 16:50:04 +00001212 if (error)
1213 return error;
1214
Steven Whitehousec8cdf472007-06-08 10:05:33 +01001215 inode = get_local_rgrp(ip, &last_unlinked);
1216 if (inode) {
Robert Peterson7ae8fa82007-05-09 09:37:57 -05001217 if (ip != GFS2_I(sdp->sd_rindex))
1218 gfs2_glock_dq_uninit(&al->al_ri_gh);
Steven Whitehousec8cdf472007-06-08 10:05:33 +01001219 if (IS_ERR(inode))
1220 return PTR_ERR(inode);
1221 iput(inode);
1222 gfs2_log_flush(sdp, NULL);
1223 goto try_again;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001224 }
1225
1226 al->al_file = file;
1227 al->al_line = line;
1228
1229 return 0;
1230}
1231
1232/**
1233 * gfs2_inplace_release - release an inplace reservation
1234 * @ip: the inode the reservation was taken out on
1235 *
1236 * Release a reservation made by gfs2_inplace_reserve().
1237 */
1238
1239void gfs2_inplace_release(struct gfs2_inode *ip)
1240{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001241 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Steven Whitehouse6dbd8222008-01-10 15:18:55 +00001242 struct gfs2_alloc *al = ip->i_alloc;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001243
1244 if (gfs2_assert_warn(sdp, al->al_alloced <= al->al_requested) == -1)
1245 fs_warn(sdp, "al_alloced = %u, al_requested = %u "
1246 "al_file = %s, al_line = %u\n",
1247 al->al_alloced, al->al_requested, al->al_file,
1248 al->al_line);
1249
1250 al->al_rgd = NULL;
Abhijith Das292c8c12007-11-29 14:13:54 -06001251 if (al->al_rgd_gh.gh_gl)
1252 gfs2_glock_dq_uninit(&al->al_rgd_gh);
Robert Peterson7ae8fa82007-05-09 09:37:57 -05001253 if (ip != GFS2_I(sdp->sd_rindex))
1254 gfs2_glock_dq_uninit(&al->al_ri_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001255}
1256
1257/**
1258 * gfs2_get_block_type - Check a block in a RG is of given type
1259 * @rgd: the resource group holding the block
1260 * @block: the block number
1261 *
1262 * Returns: The block type (GFS2_BLKST_*)
1263 */
1264
Steven Whitehousecd915492006-09-04 12:49:07 -04001265unsigned char gfs2_get_block_type(struct gfs2_rgrpd *rgd, u64 block)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001266{
1267 struct gfs2_bitmap *bi = NULL;
Steven Whitehousecd915492006-09-04 12:49:07 -04001268 u32 length, rgrp_block, buf_block;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001269 unsigned int buf;
1270 unsigned char type;
1271
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001272 length = rgd->rd_length;
1273 rgrp_block = block - rgd->rd_data0;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001274
1275 for (buf = 0; buf < length; buf++) {
1276 bi = rgd->rd_bits + buf;
1277 if (rgrp_block < (bi->bi_start + bi->bi_len) * GFS2_NBBY)
1278 break;
1279 }
1280
1281 gfs2_assert(rgd->rd_sbd, buf < length);
1282 buf_block = rgrp_block - bi->bi_start * GFS2_NBBY;
1283
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001284 type = gfs2_testbit(rgd, bi->bi_bh->b_data + bi->bi_offset,
David Teiglandb3b94fa2006-01-16 16:50:04 +00001285 bi->bi_len, buf_block);
1286
1287 return type;
1288}
1289
1290/**
1291 * rgblk_search - find a block in @old_state, change allocation
1292 * state to @new_state
1293 * @rgd: the resource group descriptor
1294 * @goal: the goal block within the RG (start here to search for avail block)
1295 * @old_state: GFS2_BLKST_XXX the before-allocation state to find
1296 * @new_state: GFS2_BLKST_XXX the after-allocation block state
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001297 * @n: The extent length
David Teiglandb3b94fa2006-01-16 16:50:04 +00001298 *
1299 * Walk rgrp's bitmap to find bits that represent a block in @old_state.
1300 * Add the found bitmap buffer to the transaction.
1301 * Set the found bits to @new_state to change block's allocation state.
1302 *
1303 * This function never fails, because we wouldn't call it unless we
1304 * know (from reservation results, etc.) that a block is available.
1305 *
1306 * Scope of @goal and returned block is just within rgrp, not the whole
1307 * filesystem.
1308 *
1309 * Returns: the block number allocated
1310 */
1311
Steven Whitehousecd915492006-09-04 12:49:07 -04001312static u32 rgblk_search(struct gfs2_rgrpd *rgd, u32 goal,
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001313 unsigned char old_state, unsigned char new_state,
1314 unsigned int *n)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001315{
1316 struct gfs2_bitmap *bi = NULL;
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001317 const u32 length = rgd->rd_length;
Steven Whitehousecd915492006-09-04 12:49:07 -04001318 u32 blk = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001319 unsigned int buf, x;
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001320 const unsigned int elen = *n;
1321 const u8 *buffer;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001322
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001323 *n = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001324 /* Find bitmap block that contains bits for goal block */
1325 for (buf = 0; buf < length; buf++) {
1326 bi = rgd->rd_bits + buf;
1327 if (goal < (bi->bi_start + bi->bi_len) * GFS2_NBBY)
1328 break;
1329 }
1330
1331 gfs2_assert(rgd->rd_sbd, buf < length);
1332
1333 /* Convert scope of "goal" from rgrp-wide to within found bit block */
1334 goal -= bi->bi_start * GFS2_NBBY;
1335
1336 /* Search (up to entire) bitmap in this rgrp for allocatable block.
1337 "x <= length", instead of "x < length", because we typically start
1338 the search in the middle of a bit block, but if we can't find an
1339 allocatable block anywhere else, we want to be able wrap around and
1340 search in the first part of our first-searched bit block. */
1341 for (x = 0; x <= length; x++) {
Bob Peterson5f3eae72007-08-08 16:52:09 -05001342 /* The GFS2_BLKST_UNLINKED state doesn't apply to the clone
1343 bitmaps, so we must search the originals for that. */
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001344 buffer = bi->bi_bh->b_data + bi->bi_offset;
Bob Peterson5f3eae72007-08-08 16:52:09 -05001345 if (old_state != GFS2_BLKST_UNLINKED && bi->bi_clone)
Steven Whitehouse110acf32008-01-29 13:30:20 +00001346 buffer = bi->bi_clone + bi->bi_offset;
1347
1348 blk = gfs2_bitfit(buffer, bi->bi_len, goal, old_state);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001349 if (blk != BFITNOENT)
1350 break;
1351
1352 /* Try next bitmap block (wrap back to rgrp header if at end) */
1353 buf = (buf + 1) % length;
1354 bi = rgd->rd_bits + buf;
1355 goal = 0;
1356 }
1357
Bob Peterson6760bdc2007-07-24 14:09:32 -05001358 if (blk != BFITNOENT && old_state != new_state) {
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001359 *n = 1;
Steven Whitehousec8cdf472007-06-08 10:05:33 +01001360 gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1);
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001361 gfs2_setbit(rgd, bi->bi_bh->b_data, bi->bi_clone, bi->bi_offset,
David Teiglandb3b94fa2006-01-16 16:50:04 +00001362 bi->bi_len, blk, new_state);
Steven Whitehouse9b8c81d2008-02-22 16:09:31 +00001363 goal = blk;
1364 while (*n < elen) {
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001365 goal++;
Steven Whitehouse9b8c81d2008-02-22 16:09:31 +00001366 if (goal >= (bi->bi_len * GFS2_NBBY))
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001367 break;
1368 if (gfs2_testbit(rgd, buffer, bi->bi_len, goal) !=
1369 GFS2_BLKST_FREE)
1370 break;
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001371 gfs2_setbit(rgd, bi->bi_bh->b_data, bi->bi_clone,
Steven Whitehouse9b8c81d2008-02-22 16:09:31 +00001372 bi->bi_offset, bi->bi_len, goal,
1373 new_state);
1374 (*n)++;
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001375 }
Steven Whitehousec8cdf472007-06-08 10:05:33 +01001376 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001377
Steven Whitehouse6eefaf62007-07-17 10:26:56 +01001378 return (blk == BFITNOENT) ? blk : (bi->bi_start * GFS2_NBBY) + blk;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001379}
1380
1381/**
1382 * rgblk_free - Change alloc state of given block(s)
1383 * @sdp: the filesystem
1384 * @bstart: the start of a run of blocks to free
1385 * @blen: the length of the block run (all must lie within ONE RG!)
1386 * @new_state: GFS2_BLKST_XXX the after-allocation block state
1387 *
1388 * Returns: Resource group containing the block(s)
1389 */
1390
Steven Whitehousecd915492006-09-04 12:49:07 -04001391static struct gfs2_rgrpd *rgblk_free(struct gfs2_sbd *sdp, u64 bstart,
1392 u32 blen, unsigned char new_state)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001393{
1394 struct gfs2_rgrpd *rgd;
1395 struct gfs2_bitmap *bi = NULL;
Steven Whitehousecd915492006-09-04 12:49:07 -04001396 u32 length, rgrp_blk, buf_blk;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001397 unsigned int buf;
1398
1399 rgd = gfs2_blk2rgrpd(sdp, bstart);
1400 if (!rgd) {
1401 if (gfs2_consist(sdp))
Steven Whitehouse382066d2006-05-24 10:22:09 -04001402 fs_err(sdp, "block = %llu\n", (unsigned long long)bstart);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001403 return NULL;
1404 }
1405
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001406 length = rgd->rd_length;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001407
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001408 rgrp_blk = bstart - rgd->rd_data0;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001409
1410 while (blen--) {
1411 for (buf = 0; buf < length; buf++) {
1412 bi = rgd->rd_bits + buf;
1413 if (rgrp_blk < (bi->bi_start + bi->bi_len) * GFS2_NBBY)
1414 break;
1415 }
1416
1417 gfs2_assert(rgd->rd_sbd, buf < length);
1418
1419 buf_blk = rgrp_blk - bi->bi_start * GFS2_NBBY;
1420 rgrp_blk++;
1421
1422 if (!bi->bi_clone) {
1423 bi->bi_clone = kmalloc(bi->bi_bh->b_size,
Steven Whitehousedd894be2006-07-27 14:29:00 -04001424 GFP_NOFS | __GFP_NOFAIL);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001425 memcpy(bi->bi_clone + bi->bi_offset,
1426 bi->bi_bh->b_data + bi->bi_offset,
1427 bi->bi_len);
1428 }
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001429 gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1);
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001430 gfs2_setbit(rgd, bi->bi_bh->b_data, NULL, bi->bi_offset,
David Teiglandb3b94fa2006-01-16 16:50:04 +00001431 bi->bi_len, buf_blk, new_state);
1432 }
1433
1434 return rgd;
1435}
1436
1437/**
Steven Whitehouse16394312008-02-01 14:52:30 +00001438 * gfs2_alloc_block - Allocate a block
1439 * @ip: the inode to allocate the block for
David Teiglandb3b94fa2006-01-16 16:50:04 +00001440 *
1441 * Returns: the allocated block
1442 */
1443
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001444u64 gfs2_alloc_block(struct gfs2_inode *ip, unsigned int *n)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001445{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001446 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Steven Whitehoused9ba7612009-04-23 08:59:41 +01001447 struct buffer_head *dibh;
Steven Whitehouse6dbd8222008-01-10 15:18:55 +00001448 struct gfs2_alloc *al = ip->i_alloc;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001449 struct gfs2_rgrpd *rgd = al->al_rgd;
Steven Whitehousecd915492006-09-04 12:49:07 -04001450 u32 goal, blk;
1451 u64 block;
Steven Whitehoused9ba7612009-04-23 08:59:41 +01001452 int error;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001453
Steven Whitehousece276b02008-02-06 09:25:45 +00001454 if (rgrp_contains_block(rgd, ip->i_goal))
1455 goal = ip->i_goal - rgd->rd_data0;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001456 else
Steven Whitehouseac576cc2008-02-01 10:34:15 +00001457 goal = rgd->rd_last_alloc;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001458
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001459 blk = rgblk_search(rgd, goal, GFS2_BLKST_FREE, GFS2_BLKST_USED, n);
Steven Whitehouse6eefaf62007-07-17 10:26:56 +01001460 BUG_ON(blk == BFITNOENT);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001461
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001462 rgd->rd_last_alloc = blk;
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001463 block = rgd->rd_data0 + blk;
Steven Whitehousece276b02008-02-06 09:25:45 +00001464 ip->i_goal = block;
Steven Whitehoused9ba7612009-04-23 08:59:41 +01001465 error = gfs2_meta_inode_buffer(ip, &dibh);
1466 if (error == 0) {
1467 struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data;
1468 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1469 di->di_goal_meta = di->di_goal_data = cpu_to_be64(ip->i_goal);
1470 brelse(dibh);
1471 }
Steven Whitehousecfc8b542008-11-04 10:25:13 +00001472 gfs2_assert_withdraw(sdp, rgd->rd_free >= *n);
1473 rgd->rd_free -= *n;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001474
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001475 gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
Bob Peterson42d52e32008-01-28 18:38:07 -06001476 gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001477
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001478 al->al_alloced += *n;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001479
Andrew Pricead99f772008-05-01 11:55:38 +01001480 gfs2_statfs_change(sdp, 0, -(s64)*n, 0);
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001481 gfs2_quota_change(ip, *n, ip->i_inode.i_uid, ip->i_inode.i_gid);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001482
1483 spin_lock(&sdp->sd_rindex_spin);
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001484 rgd->rd_free_clone -= *n;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001485 spin_unlock(&sdp->sd_rindex_spin);
1486
1487 return block;
1488}
1489
1490/**
1491 * gfs2_alloc_di - Allocate a dinode
1492 * @dip: the directory that the inode is going in
1493 *
1494 * Returns: the block allocated
1495 */
1496
Steven Whitehouse4340fe62006-07-11 09:46:33 -04001497u64 gfs2_alloc_di(struct gfs2_inode *dip, u64 *generation)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001498{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001499 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
Steven Whitehouse6dbd8222008-01-10 15:18:55 +00001500 struct gfs2_alloc *al = dip->i_alloc;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001501 struct gfs2_rgrpd *rgd = al->al_rgd;
Steven Whitehouse4340fe62006-07-11 09:46:33 -04001502 u32 blk;
1503 u64 block;
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001504 unsigned int n = 1;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001505
Steven Whitehouseac576cc2008-02-01 10:34:15 +00001506 blk = rgblk_search(rgd, rgd->rd_last_alloc,
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001507 GFS2_BLKST_FREE, GFS2_BLKST_DINODE, &n);
Steven Whitehouse6eefaf62007-07-17 10:26:56 +01001508 BUG_ON(blk == BFITNOENT);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001509
Steven Whitehouseac576cc2008-02-01 10:34:15 +00001510 rgd->rd_last_alloc = blk;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001511
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001512 block = rgd->rd_data0 + blk;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001513
Steven Whitehousecfc8b542008-11-04 10:25:13 +00001514 gfs2_assert_withdraw(sdp, rgd->rd_free);
1515 rgd->rd_free--;
Steven Whitehouse73f74942008-11-04 10:32:57 +00001516 rgd->rd_dinodes++;
Steven Whitehoused8b71f72008-11-04 10:19:03 +00001517 *generation = rgd->rd_igeneration++;
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001518 gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
Bob Peterson42d52e32008-01-28 18:38:07 -06001519 gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001520
1521 al->al_alloced++;
1522
1523 gfs2_statfs_change(sdp, 0, -1, +1);
Steven Whitehouse5731be52008-02-01 13:16:55 +00001524 gfs2_trans_add_unrevoke(sdp, block, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001525
1526 spin_lock(&sdp->sd_rindex_spin);
1527 rgd->rd_free_clone--;
1528 spin_unlock(&sdp->sd_rindex_spin);
1529
1530 return block;
1531}
1532
1533/**
1534 * gfs2_free_data - free a contiguous run of data block(s)
1535 * @ip: the inode these blocks are being freed from
1536 * @bstart: first block of a run of contiguous blocks
1537 * @blen: the length of the block run
1538 *
1539 */
1540
Steven Whitehousecd915492006-09-04 12:49:07 -04001541void gfs2_free_data(struct gfs2_inode *ip, u64 bstart, u32 blen)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001542{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001543 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001544 struct gfs2_rgrpd *rgd;
1545
1546 rgd = rgblk_free(sdp, bstart, blen, GFS2_BLKST_FREE);
1547 if (!rgd)
1548 return;
1549
Steven Whitehousecfc8b542008-11-04 10:25:13 +00001550 rgd->rd_free += blen;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001551
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001552 gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
Bob Peterson42d52e32008-01-28 18:38:07 -06001553 gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001554
1555 gfs2_trans_add_rg(rgd);
1556
1557 gfs2_statfs_change(sdp, 0, +blen, 0);
Steven Whitehouse2933f922006-11-01 13:23:29 -05001558 gfs2_quota_change(ip, -(s64)blen, ip->i_inode.i_uid, ip->i_inode.i_gid);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001559}
1560
1561/**
1562 * gfs2_free_meta - free a contiguous run of data block(s)
1563 * @ip: the inode these blocks are being freed from
1564 * @bstart: first block of a run of contiguous blocks
1565 * @blen: the length of the block run
1566 *
1567 */
1568
Steven Whitehousecd915492006-09-04 12:49:07 -04001569void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001570{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001571 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001572 struct gfs2_rgrpd *rgd;
1573
1574 rgd = rgblk_free(sdp, bstart, blen, GFS2_BLKST_FREE);
1575 if (!rgd)
1576 return;
1577
Steven Whitehousecfc8b542008-11-04 10:25:13 +00001578 rgd->rd_free += blen;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001579
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001580 gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
Bob Peterson42d52e32008-01-28 18:38:07 -06001581 gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001582
1583 gfs2_trans_add_rg(rgd);
1584
1585 gfs2_statfs_change(sdp, 0, +blen, 0);
Steven Whitehouse2933f922006-11-01 13:23:29 -05001586 gfs2_quota_change(ip, -(s64)blen, ip->i_inode.i_uid, ip->i_inode.i_gid);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001587 gfs2_meta_wipe(ip, bstart, blen);
1588}
1589
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001590void gfs2_unlink_di(struct inode *inode)
1591{
1592 struct gfs2_inode *ip = GFS2_I(inode);
1593 struct gfs2_sbd *sdp = GFS2_SB(inode);
1594 struct gfs2_rgrpd *rgd;
Steven Whitehousedbb7cae2007-05-15 15:37:50 +01001595 u64 blkno = ip->i_no_addr;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001596
1597 rgd = rgblk_free(sdp, blkno, 1, GFS2_BLKST_UNLINKED);
1598 if (!rgd)
1599 return;
1600 gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
Bob Peterson42d52e32008-01-28 18:38:07 -06001601 gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001602 gfs2_trans_add_rg(rgd);
1603}
1604
Steven Whitehousecd915492006-09-04 12:49:07 -04001605static void gfs2_free_uninit_di(struct gfs2_rgrpd *rgd, u64 blkno)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001606{
1607 struct gfs2_sbd *sdp = rgd->rd_sbd;
1608 struct gfs2_rgrpd *tmp_rgd;
1609
1610 tmp_rgd = rgblk_free(sdp, blkno, 1, GFS2_BLKST_FREE);
1611 if (!tmp_rgd)
1612 return;
1613 gfs2_assert_withdraw(sdp, rgd == tmp_rgd);
1614
Steven Whitehouse73f74942008-11-04 10:32:57 +00001615 if (!rgd->rd_dinodes)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001616 gfs2_consist_rgrpd(rgd);
Steven Whitehouse73f74942008-11-04 10:32:57 +00001617 rgd->rd_dinodes--;
Steven Whitehousecfc8b542008-11-04 10:25:13 +00001618 rgd->rd_free++;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001619
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001620 gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
Bob Peterson42d52e32008-01-28 18:38:07 -06001621 gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001622
1623 gfs2_statfs_change(sdp, 0, +1, -1);
1624 gfs2_trans_add_rg(rgd);
1625}
1626
David Teiglandb3b94fa2006-01-16 16:50:04 +00001627
1628void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip)
1629{
Steven Whitehousedbb7cae2007-05-15 15:37:50 +01001630 gfs2_free_uninit_di(rgd, ip->i_no_addr);
Steven Whitehouse2933f922006-11-01 13:23:29 -05001631 gfs2_quota_change(ip, -1, ip->i_inode.i_uid, ip->i_inode.i_gid);
Steven Whitehousedbb7cae2007-05-15 15:37:50 +01001632 gfs2_meta_wipe(ip, ip->i_no_addr, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001633}
1634
1635/**
1636 * gfs2_rlist_add - add a RG to a list of RGs
1637 * @sdp: the filesystem
1638 * @rlist: the list of resource groups
1639 * @block: the block
1640 *
1641 * Figure out what RG a block belongs to and add that RG to the list
1642 *
1643 * FIXME: Don't use NOFAIL
1644 *
1645 */
1646
1647void gfs2_rlist_add(struct gfs2_sbd *sdp, struct gfs2_rgrp_list *rlist,
Steven Whitehousecd915492006-09-04 12:49:07 -04001648 u64 block)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001649{
1650 struct gfs2_rgrpd *rgd;
1651 struct gfs2_rgrpd **tmp;
1652 unsigned int new_space;
1653 unsigned int x;
1654
1655 if (gfs2_assert_warn(sdp, !rlist->rl_ghs))
1656 return;
1657
1658 rgd = gfs2_blk2rgrpd(sdp, block);
1659 if (!rgd) {
1660 if (gfs2_consist(sdp))
Steven Whitehouse382066d2006-05-24 10:22:09 -04001661 fs_err(sdp, "block = %llu\n", (unsigned long long)block);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001662 return;
1663 }
1664
1665 for (x = 0; x < rlist->rl_rgrps; x++)
1666 if (rlist->rl_rgd[x] == rgd)
1667 return;
1668
1669 if (rlist->rl_rgrps == rlist->rl_space) {
1670 new_space = rlist->rl_space + 10;
1671
1672 tmp = kcalloc(new_space, sizeof(struct gfs2_rgrpd *),
Steven Whitehousedd894be2006-07-27 14:29:00 -04001673 GFP_NOFS | __GFP_NOFAIL);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001674
1675 if (rlist->rl_rgd) {
1676 memcpy(tmp, rlist->rl_rgd,
1677 rlist->rl_space * sizeof(struct gfs2_rgrpd *));
1678 kfree(rlist->rl_rgd);
1679 }
1680
1681 rlist->rl_space = new_space;
1682 rlist->rl_rgd = tmp;
1683 }
1684
1685 rlist->rl_rgd[rlist->rl_rgrps++] = rgd;
1686}
1687
1688/**
1689 * gfs2_rlist_alloc - all RGs have been added to the rlist, now allocate
1690 * and initialize an array of glock holders for them
1691 * @rlist: the list of resource groups
1692 * @state: the lock state to acquire the RG lock in
1693 * @flags: the modifier flags for the holder structures
1694 *
1695 * FIXME: Don't use NOFAIL
1696 *
1697 */
1698
Bob Petersonfe6c9912008-01-28 11:13:02 -06001699void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist, unsigned int state)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001700{
1701 unsigned int x;
1702
1703 rlist->rl_ghs = kcalloc(rlist->rl_rgrps, sizeof(struct gfs2_holder),
Steven Whitehousedd894be2006-07-27 14:29:00 -04001704 GFP_NOFS | __GFP_NOFAIL);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001705 for (x = 0; x < rlist->rl_rgrps; x++)
1706 gfs2_holder_init(rlist->rl_rgd[x]->rd_gl,
Bob Petersonfe6c9912008-01-28 11:13:02 -06001707 state, 0,
David Teiglandb3b94fa2006-01-16 16:50:04 +00001708 &rlist->rl_ghs[x]);
1709}
1710
1711/**
1712 * gfs2_rlist_free - free a resource group list
1713 * @list: the list of resource groups
1714 *
1715 */
1716
1717void gfs2_rlist_free(struct gfs2_rgrp_list *rlist)
1718{
1719 unsigned int x;
1720
1721 kfree(rlist->rl_rgd);
1722
1723 if (rlist->rl_ghs) {
1724 for (x = 0; x < rlist->rl_rgrps; x++)
1725 gfs2_holder_uninit(&rlist->rl_ghs[x]);
1726 kfree(rlist->rl_ghs);
1727 }
1728}
1729