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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
4 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
5 */
6
7#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
8
9#include <linux/sched.h>
10#include <linux/slab.h>
11#include <linux/spinlock.h>
12#include <linux/completion.h>
13#include <linux/buffer_head.h>
14#include <linux/kallsyms.h>
15#include <linux/gfs2_ondisk.h>
16
17#include "gfs2.h"
18#include "incore.h"
19#include "glock.h"
20#include "inode.h"
21#include "log.h"
22#include "lops.h"
23#include "meta_io.h"
24#include "trans.h"
25#include "util.h"
26#include "trace_gfs2.h"
27
28static void gfs2_print_trans(struct gfs2_sbd *sdp, const struct gfs2_trans *tr)
29{
30 fs_warn(sdp, "Transaction created at: %pSR\n", (void *)tr->tr_ip);
31 fs_warn(sdp, "blocks=%u revokes=%u reserved=%u touched=%u\n",
32 tr->tr_blocks, tr->tr_revokes, tr->tr_reserved,
33 test_bit(TR_TOUCHED, &tr->tr_flags));
34 fs_warn(sdp, "Buf %u/%u Databuf %u/%u Revoke %u\n",
35 tr->tr_num_buf_new, tr->tr_num_buf_rm,
36 tr->tr_num_databuf_new, tr->tr_num_databuf_rm,
37 tr->tr_num_revoke);
38}
39
40int __gfs2_trans_begin(struct gfs2_trans *tr, struct gfs2_sbd *sdp,
41 unsigned int blocks, unsigned int revokes,
42 unsigned long ip)
43{
44 unsigned int extra_revokes;
45
46 if (current->journal_info) {
47 gfs2_print_trans(sdp, current->journal_info);
48 BUG();
49 }
50 BUG_ON(blocks == 0 && revokes == 0);
51
52 if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags))
53 return -EROFS;
54
55 tr->tr_ip = ip;
56 tr->tr_blocks = blocks;
57 tr->tr_revokes = revokes;
58 tr->tr_reserved = GFS2_LOG_FLUSH_MIN_BLOCKS;
59 if (blocks) {
60 /*
61 * The reserved blocks are either used for data or metadata.
62 * We can have mixed data and metadata, each with its own log
63 * descriptor block; see calc_reserved().
64 */
65 tr->tr_reserved += blocks + 1 + DIV_ROUND_UP(blocks - 1, databuf_limit(sdp));
66 }
67 INIT_LIST_HEAD(&tr->tr_databuf);
68 INIT_LIST_HEAD(&tr->tr_buf);
69 INIT_LIST_HEAD(&tr->tr_list);
70 INIT_LIST_HEAD(&tr->tr_ail1_list);
71 INIT_LIST_HEAD(&tr->tr_ail2_list);
72
73 if (gfs2_assert_warn(sdp, tr->tr_reserved <= sdp->sd_jdesc->jd_blocks))
74 return -EINVAL;
75
76 sb_start_intwrite(sdp->sd_vfs);
77
78 /*
79 * Try the reservations under sd_log_flush_lock to prevent log flushes
80 * from creating inconsistencies between the number of allocated and
81 * reserved revokes. If that fails, do a full-block allocation outside
82 * of the lock to avoid stalling log flushes. Then, allot the
83 * appropriate number of blocks to revokes, use as many revokes locally
84 * as needed, and "release" the surplus into the revokes pool.
85 */
86
87 down_read(&sdp->sd_log_flush_lock);
88 if (gfs2_log_try_reserve(sdp, tr, &extra_revokes))
89 goto reserved;
90 up_read(&sdp->sd_log_flush_lock);
91 gfs2_log_reserve(sdp, tr, &extra_revokes);
92 down_read(&sdp->sd_log_flush_lock);
93
94reserved:
95 gfs2_log_release_revokes(sdp, extra_revokes);
96 if (unlikely(!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags))) {
97 gfs2_log_release_revokes(sdp, tr->tr_revokes);
98 up_read(&sdp->sd_log_flush_lock);
99 gfs2_log_release(sdp, tr->tr_reserved);
100 sb_end_intwrite(sdp->sd_vfs);
101 return -EROFS;
102 }
103
104 current->journal_info = tr;
105
106 return 0;
107}
108
109int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks,
110 unsigned int revokes)
111{
112 struct gfs2_trans *tr;
113 int error;
114
115 tr = kmem_cache_zalloc(gfs2_trans_cachep, GFP_NOFS);
116 if (!tr)
117 return -ENOMEM;
118 error = __gfs2_trans_begin(tr, sdp, blocks, revokes, _RET_IP_);
119 if (error)
120 kmem_cache_free(gfs2_trans_cachep, tr);
121 return error;
122}
123
124void gfs2_trans_end(struct gfs2_sbd *sdp)
125{
126 struct gfs2_trans *tr = current->journal_info;
127 s64 nbuf;
128
129 current->journal_info = NULL;
130
131 if (!test_bit(TR_TOUCHED, &tr->tr_flags)) {
132 gfs2_log_release_revokes(sdp, tr->tr_revokes);
133 up_read(&sdp->sd_log_flush_lock);
134 gfs2_log_release(sdp, tr->tr_reserved);
135 if (!test_bit(TR_ONSTACK, &tr->tr_flags))
136 gfs2_trans_free(sdp, tr);
137 sb_end_intwrite(sdp->sd_vfs);
138 return;
139 }
140
141 gfs2_log_release_revokes(sdp, tr->tr_revokes - tr->tr_num_revoke);
142
143 nbuf = tr->tr_num_buf_new + tr->tr_num_databuf_new;
144 nbuf -= tr->tr_num_buf_rm;
145 nbuf -= tr->tr_num_databuf_rm;
146
147 if (gfs2_assert_withdraw(sdp, nbuf <= tr->tr_blocks) ||
148 gfs2_assert_withdraw(sdp, tr->tr_num_revoke <= tr->tr_revokes))
149 gfs2_print_trans(sdp, tr);
150
151 gfs2_log_commit(sdp, tr);
152 if (!test_bit(TR_ONSTACK, &tr->tr_flags) &&
153 !test_bit(TR_ATTACHED, &tr->tr_flags))
154 gfs2_trans_free(sdp, tr);
155 up_read(&sdp->sd_log_flush_lock);
156
157 if (sdp->sd_vfs->s_flags & SB_SYNCHRONOUS)
158 gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
159 GFS2_LFC_TRANS_END);
160 sb_end_intwrite(sdp->sd_vfs);
161}
162
163static struct gfs2_bufdata *gfs2_alloc_bufdata(struct gfs2_glock *gl,
164 struct buffer_head *bh)
165{
166 struct gfs2_bufdata *bd;
167
168 bd = kmem_cache_zalloc(gfs2_bufdata_cachep, GFP_NOFS | __GFP_NOFAIL);
169 bd->bd_bh = bh;
170 bd->bd_gl = gl;
171 INIT_LIST_HEAD(&bd->bd_list);
172 INIT_LIST_HEAD(&bd->bd_ail_st_list);
173 INIT_LIST_HEAD(&bd->bd_ail_gl_list);
174 bh->b_private = bd;
175 return bd;
176}
177
178/**
179 * gfs2_trans_add_data - Add a databuf to the transaction.
180 * @gl: The inode glock associated with the buffer
181 * @bh: The buffer to add
182 *
183 * This is used in journaled data mode.
184 * We need to journal the data block in the same way as metadata in
185 * the functions above. The difference is that here we have a tag
186 * which is two __be64's being the block number (as per meta data)
187 * and a flag which says whether the data block needs escaping or
188 * not. This means we need a new log entry for each 251 or so data
189 * blocks, which isn't an enormous overhead but twice as much as
190 * for normal metadata blocks.
191 */
192void gfs2_trans_add_data(struct gfs2_glock *gl, struct buffer_head *bh)
193{
194 struct gfs2_trans *tr = current->journal_info;
195 struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
196 struct gfs2_bufdata *bd;
197
198 lock_buffer(bh);
199 if (buffer_pinned(bh)) {
200 set_bit(TR_TOUCHED, &tr->tr_flags);
201 goto out;
202 }
203 gfs2_log_lock(sdp);
204 bd = bh->b_private;
205 if (bd == NULL) {
206 gfs2_log_unlock(sdp);
207 unlock_buffer(bh);
208 if (bh->b_private == NULL)
209 bd = gfs2_alloc_bufdata(gl, bh);
210 else
211 bd = bh->b_private;
212 lock_buffer(bh);
213 gfs2_log_lock(sdp);
214 }
215 gfs2_assert(sdp, bd->bd_gl == gl);
216 set_bit(TR_TOUCHED, &tr->tr_flags);
217 if (list_empty(&bd->bd_list)) {
218 set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
219 set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
220 gfs2_pin(sdp, bd->bd_bh);
221 tr->tr_num_databuf_new++;
222 list_add_tail(&bd->bd_list, &tr->tr_databuf);
223 }
224 gfs2_log_unlock(sdp);
225out:
226 unlock_buffer(bh);
227}
228
229void gfs2_trans_add_meta(struct gfs2_glock *gl, struct buffer_head *bh)
230{
231
232 struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
233 struct gfs2_bufdata *bd;
234 struct gfs2_meta_header *mh;
235 struct gfs2_trans *tr = current->journal_info;
236 enum gfs2_freeze_state state = atomic_read(&sdp->sd_freeze_state);
237
238 lock_buffer(bh);
239 if (buffer_pinned(bh)) {
240 set_bit(TR_TOUCHED, &tr->tr_flags);
241 goto out;
242 }
243 gfs2_log_lock(sdp);
244 bd = bh->b_private;
245 if (bd == NULL) {
246 gfs2_log_unlock(sdp);
247 unlock_buffer(bh);
248 lock_page(bh->b_page);
249 if (bh->b_private == NULL)
250 bd = gfs2_alloc_bufdata(gl, bh);
251 else
252 bd = bh->b_private;
253 unlock_page(bh->b_page);
254 lock_buffer(bh);
255 gfs2_log_lock(sdp);
256 }
257 gfs2_assert(sdp, bd->bd_gl == gl);
258 set_bit(TR_TOUCHED, &tr->tr_flags);
259 if (!list_empty(&bd->bd_list))
260 goto out_unlock;
261 set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
262 set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
263 mh = (struct gfs2_meta_header *)bd->bd_bh->b_data;
264 if (unlikely(mh->mh_magic != cpu_to_be32(GFS2_MAGIC))) {
265 fs_err(sdp, "Attempting to add uninitialised block to "
266 "journal (inplace block=%lld)\n",
267 (unsigned long long)bd->bd_bh->b_blocknr);
268 BUG();
269 }
270 if (unlikely(state == SFS_FROZEN)) {
271 fs_info(sdp, "GFS2:adding buf while frozen\n");
272 gfs2_assert_withdraw(sdp, 0);
273 }
274 if (unlikely(gfs2_withdrawn(sdp))) {
275 fs_info(sdp, "GFS2:adding buf while withdrawn! 0x%llx\n",
276 (unsigned long long)bd->bd_bh->b_blocknr);
277 }
278 gfs2_pin(sdp, bd->bd_bh);
279 mh->__pad0 = cpu_to_be64(0);
280 mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid);
281 list_add(&bd->bd_list, &tr->tr_buf);
282 tr->tr_num_buf_new++;
283out_unlock:
284 gfs2_log_unlock(sdp);
285out:
286 unlock_buffer(bh);
287}
288
289void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd)
290{
291 struct gfs2_trans *tr = current->journal_info;
292
293 BUG_ON(!list_empty(&bd->bd_list));
294 gfs2_add_revoke(sdp, bd);
295 set_bit(TR_TOUCHED, &tr->tr_flags);
296 tr->tr_num_revoke++;
297}
298
299void gfs2_trans_remove_revoke(struct gfs2_sbd *sdp, u64 blkno, unsigned int len)
300{
301 struct gfs2_bufdata *bd, *tmp;
302 unsigned int n = len;
303
304 gfs2_log_lock(sdp);
305 list_for_each_entry_safe(bd, tmp, &sdp->sd_log_revokes, bd_list) {
306 if ((bd->bd_blkno >= blkno) && (bd->bd_blkno < (blkno + len))) {
307 list_del_init(&bd->bd_list);
308 gfs2_assert_withdraw(sdp, sdp->sd_log_num_revoke);
309 sdp->sd_log_num_revoke--;
310 if (bd->bd_gl)
311 gfs2_glock_remove_revoke(bd->bd_gl);
312 kmem_cache_free(gfs2_bufdata_cachep, bd);
313 gfs2_log_release_revokes(sdp, 1);
314 if (--n == 0)
315 break;
316 }
317 }
318 gfs2_log_unlock(sdp);
319}
320
321void gfs2_trans_free(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
322{
323 if (tr == NULL)
324 return;
325
326 gfs2_assert_warn(sdp, list_empty(&tr->tr_ail1_list));
327 gfs2_assert_warn(sdp, list_empty(&tr->tr_ail2_list));
328 gfs2_assert_warn(sdp, list_empty(&tr->tr_databuf));
329 gfs2_assert_warn(sdp, list_empty(&tr->tr_buf));
330 kmem_cache_free(gfs2_trans_cachep, tr);
331}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
4 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
5 */
6
7#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
8
9#include <linux/sched.h>
10#include <linux/slab.h>
11#include <linux/spinlock.h>
12#include <linux/completion.h>
13#include <linux/buffer_head.h>
14#include <linux/kallsyms.h>
15#include <linux/gfs2_ondisk.h>
16
17#include "gfs2.h"
18#include "incore.h"
19#include "glock.h"
20#include "inode.h"
21#include "log.h"
22#include "lops.h"
23#include "meta_io.h"
24#include "trans.h"
25#include "util.h"
26#include "trace_gfs2.h"
27
28int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks,
29 unsigned int revokes)
30{
31 struct gfs2_trans *tr;
32 int error;
33
34 BUG_ON(current->journal_info);
35 BUG_ON(blocks == 0 && revokes == 0);
36
37 if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags))
38 return -EROFS;
39
40 tr = kzalloc(sizeof(struct gfs2_trans), GFP_NOFS);
41 if (!tr)
42 return -ENOMEM;
43
44 tr->tr_ip = _RET_IP_;
45 tr->tr_blocks = blocks;
46 tr->tr_revokes = revokes;
47 tr->tr_reserved = 1;
48 set_bit(TR_ALLOCED, &tr->tr_flags);
49 if (blocks)
50 tr->tr_reserved += 6 + blocks;
51 if (revokes)
52 tr->tr_reserved += gfs2_struct2blk(sdp, revokes,
53 sizeof(u64));
54 INIT_LIST_HEAD(&tr->tr_databuf);
55 INIT_LIST_HEAD(&tr->tr_buf);
56
57 sb_start_intwrite(sdp->sd_vfs);
58
59 error = gfs2_log_reserve(sdp, tr->tr_reserved);
60 if (error)
61 goto fail;
62
63 current->journal_info = tr;
64
65 return 0;
66
67fail:
68 sb_end_intwrite(sdp->sd_vfs);
69 kfree(tr);
70
71 return error;
72}
73
74static void gfs2_print_trans(struct gfs2_sbd *sdp, const struct gfs2_trans *tr)
75{
76 fs_warn(sdp, "Transaction created at: %pSR\n", (void *)tr->tr_ip);
77 fs_warn(sdp, "blocks=%u revokes=%u reserved=%u touched=%u\n",
78 tr->tr_blocks, tr->tr_revokes, tr->tr_reserved,
79 test_bit(TR_TOUCHED, &tr->tr_flags));
80 fs_warn(sdp, "Buf %u/%u Databuf %u/%u Revoke %u\n",
81 tr->tr_num_buf_new, tr->tr_num_buf_rm,
82 tr->tr_num_databuf_new, tr->tr_num_databuf_rm,
83 tr->tr_num_revoke);
84}
85
86void gfs2_trans_end(struct gfs2_sbd *sdp)
87{
88 struct gfs2_trans *tr = current->journal_info;
89 s64 nbuf;
90 int alloced = test_bit(TR_ALLOCED, &tr->tr_flags);
91
92 current->journal_info = NULL;
93
94 if (!test_bit(TR_TOUCHED, &tr->tr_flags)) {
95 gfs2_log_release(sdp, tr->tr_reserved);
96 if (alloced) {
97 kfree(tr);
98 sb_end_intwrite(sdp->sd_vfs);
99 }
100 return;
101 }
102
103 nbuf = tr->tr_num_buf_new + tr->tr_num_databuf_new;
104 nbuf -= tr->tr_num_buf_rm;
105 nbuf -= tr->tr_num_databuf_rm;
106
107 if (gfs2_assert_withdraw(sdp, (nbuf <= tr->tr_blocks) &&
108 (tr->tr_num_revoke <= tr->tr_revokes)))
109 gfs2_print_trans(sdp, tr);
110
111 gfs2_log_commit(sdp, tr);
112 if (alloced && !test_bit(TR_ATTACHED, &tr->tr_flags))
113 kfree(tr);
114 up_read(&sdp->sd_log_flush_lock);
115
116 if (sdp->sd_vfs->s_flags & SB_SYNCHRONOUS)
117 gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
118 GFS2_LFC_TRANS_END);
119 if (alloced)
120 sb_end_intwrite(sdp->sd_vfs);
121}
122
123static struct gfs2_bufdata *gfs2_alloc_bufdata(struct gfs2_glock *gl,
124 struct buffer_head *bh)
125{
126 struct gfs2_bufdata *bd;
127
128 bd = kmem_cache_zalloc(gfs2_bufdata_cachep, GFP_NOFS | __GFP_NOFAIL);
129 bd->bd_bh = bh;
130 bd->bd_gl = gl;
131 INIT_LIST_HEAD(&bd->bd_list);
132 bh->b_private = bd;
133 return bd;
134}
135
136/**
137 * gfs2_trans_add_data - Add a databuf to the transaction.
138 * @gl: The inode glock associated with the buffer
139 * @bh: The buffer to add
140 *
141 * This is used in journaled data mode.
142 * We need to journal the data block in the same way as metadata in
143 * the functions above. The difference is that here we have a tag
144 * which is two __be64's being the block number (as per meta data)
145 * and a flag which says whether the data block needs escaping or
146 * not. This means we need a new log entry for each 251 or so data
147 * blocks, which isn't an enormous overhead but twice as much as
148 * for normal metadata blocks.
149 */
150void gfs2_trans_add_data(struct gfs2_glock *gl, struct buffer_head *bh)
151{
152 struct gfs2_trans *tr = current->journal_info;
153 struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
154 struct gfs2_bufdata *bd;
155
156 lock_buffer(bh);
157 if (buffer_pinned(bh)) {
158 set_bit(TR_TOUCHED, &tr->tr_flags);
159 goto out;
160 }
161 gfs2_log_lock(sdp);
162 bd = bh->b_private;
163 if (bd == NULL) {
164 gfs2_log_unlock(sdp);
165 unlock_buffer(bh);
166 if (bh->b_private == NULL)
167 bd = gfs2_alloc_bufdata(gl, bh);
168 else
169 bd = bh->b_private;
170 lock_buffer(bh);
171 gfs2_log_lock(sdp);
172 }
173 gfs2_assert(sdp, bd->bd_gl == gl);
174 set_bit(TR_TOUCHED, &tr->tr_flags);
175 if (list_empty(&bd->bd_list)) {
176 set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
177 set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
178 gfs2_pin(sdp, bd->bd_bh);
179 tr->tr_num_databuf_new++;
180 list_add_tail(&bd->bd_list, &tr->tr_databuf);
181 }
182 gfs2_log_unlock(sdp);
183out:
184 unlock_buffer(bh);
185}
186
187void gfs2_trans_add_meta(struct gfs2_glock *gl, struct buffer_head *bh)
188{
189
190 struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
191 struct gfs2_bufdata *bd;
192 struct gfs2_meta_header *mh;
193 struct gfs2_trans *tr = current->journal_info;
194 enum gfs2_freeze_state state = atomic_read(&sdp->sd_freeze_state);
195
196 lock_buffer(bh);
197 if (buffer_pinned(bh)) {
198 set_bit(TR_TOUCHED, &tr->tr_flags);
199 goto out;
200 }
201 gfs2_log_lock(sdp);
202 bd = bh->b_private;
203 if (bd == NULL) {
204 gfs2_log_unlock(sdp);
205 unlock_buffer(bh);
206 lock_page(bh->b_page);
207 if (bh->b_private == NULL)
208 bd = gfs2_alloc_bufdata(gl, bh);
209 else
210 bd = bh->b_private;
211 unlock_page(bh->b_page);
212 lock_buffer(bh);
213 gfs2_log_lock(sdp);
214 }
215 gfs2_assert(sdp, bd->bd_gl == gl);
216 set_bit(TR_TOUCHED, &tr->tr_flags);
217 if (!list_empty(&bd->bd_list))
218 goto out_unlock;
219 set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
220 set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
221 mh = (struct gfs2_meta_header *)bd->bd_bh->b_data;
222 if (unlikely(mh->mh_magic != cpu_to_be32(GFS2_MAGIC))) {
223 fs_err(sdp, "Attempting to add uninitialised block to "
224 "journal (inplace block=%lld)\n",
225 (unsigned long long)bd->bd_bh->b_blocknr);
226 BUG();
227 }
228 if (unlikely(state == SFS_FROZEN)) {
229 fs_info(sdp, "GFS2:adding buf while frozen\n");
230 gfs2_assert_withdraw(sdp, 0);
231 }
232 gfs2_pin(sdp, bd->bd_bh);
233 mh->__pad0 = cpu_to_be64(0);
234 mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid);
235 list_add(&bd->bd_list, &tr->tr_buf);
236 tr->tr_num_buf_new++;
237out_unlock:
238 gfs2_log_unlock(sdp);
239out:
240 unlock_buffer(bh);
241}
242
243void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd)
244{
245 struct gfs2_trans *tr = current->journal_info;
246
247 BUG_ON(!list_empty(&bd->bd_list));
248 gfs2_add_revoke(sdp, bd);
249 set_bit(TR_TOUCHED, &tr->tr_flags);
250 tr->tr_num_revoke++;
251}
252
253void gfs2_trans_remove_revoke(struct gfs2_sbd *sdp, u64 blkno, unsigned int len)
254{
255 struct gfs2_bufdata *bd, *tmp;
256 struct gfs2_trans *tr = current->journal_info;
257 unsigned int n = len;
258
259 gfs2_log_lock(sdp);
260 list_for_each_entry_safe(bd, tmp, &sdp->sd_log_revokes, bd_list) {
261 if ((bd->bd_blkno >= blkno) && (bd->bd_blkno < (blkno + len))) {
262 list_del_init(&bd->bd_list);
263 gfs2_assert_withdraw(sdp, sdp->sd_log_num_revoke);
264 sdp->sd_log_num_revoke--;
265 kmem_cache_free(gfs2_bufdata_cachep, bd);
266 tr->tr_num_revoke--;
267 if (--n == 0)
268 break;
269 }
270 }
271 gfs2_log_unlock(sdp);
272}
273