1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
4 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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>
26 #include "trace_gfs2.h"
28 static void gfs2_print_trans(struct gfs2_sbd
*sdp
, const struct gfs2_trans
*tr
)
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/%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
, tr
->tr_num_revoke_rm
);
40 int gfs2_trans_begin(struct gfs2_sbd
*sdp
, unsigned int blocks
,
43 struct gfs2_trans
*tr
;
46 if (current
->journal_info
) {
47 gfs2_print_trans(sdp
, current
->journal_info
);
50 BUG_ON(blocks
== 0 && revokes
== 0);
52 if (!test_bit(SDF_JOURNAL_LIVE
, &sdp
->sd_flags
))
55 tr
= kmem_cache_zalloc(gfs2_trans_cachep
, GFP_NOFS
);
60 tr
->tr_blocks
= blocks
;
61 tr
->tr_revokes
= revokes
;
63 set_bit(TR_ALLOCED
, &tr
->tr_flags
);
65 tr
->tr_reserved
+= 6 + blocks
;
67 tr
->tr_reserved
+= gfs2_struct2blk(sdp
, revokes
);
68 INIT_LIST_HEAD(&tr
->tr_databuf
);
69 INIT_LIST_HEAD(&tr
->tr_buf
);
70 INIT_LIST_HEAD(&tr
->tr_list
);
71 INIT_LIST_HEAD(&tr
->tr_ail1_list
);
72 INIT_LIST_HEAD(&tr
->tr_ail2_list
);
74 sb_start_intwrite(sdp
->sd_vfs
);
76 error
= gfs2_log_reserve(sdp
, tr
->tr_reserved
);
80 current
->journal_info
= tr
;
85 sb_end_intwrite(sdp
->sd_vfs
);
86 kmem_cache_free(gfs2_trans_cachep
, tr
);
91 void gfs2_trans_end(struct gfs2_sbd
*sdp
)
93 struct gfs2_trans
*tr
= current
->journal_info
;
95 int alloced
= test_bit(TR_ALLOCED
, &tr
->tr_flags
);
97 current
->journal_info
= NULL
;
99 if (!test_bit(TR_TOUCHED
, &tr
->tr_flags
)) {
100 gfs2_log_release(sdp
, tr
->tr_reserved
);
102 gfs2_trans_free(sdp
, tr
);
103 sb_end_intwrite(sdp
->sd_vfs
);
108 nbuf
= tr
->tr_num_buf_new
+ tr
->tr_num_databuf_new
;
109 nbuf
-= tr
->tr_num_buf_rm
;
110 nbuf
-= tr
->tr_num_databuf_rm
;
112 if (gfs2_assert_withdraw(sdp
, (nbuf
<= tr
->tr_blocks
) &&
113 (tr
->tr_num_revoke
<= tr
->tr_revokes
)))
114 gfs2_print_trans(sdp
, tr
);
116 gfs2_log_commit(sdp
, tr
);
117 if (alloced
&& !test_bit(TR_ATTACHED
, &tr
->tr_flags
))
118 gfs2_trans_free(sdp
, tr
);
119 up_read(&sdp
->sd_log_flush_lock
);
121 if (sdp
->sd_vfs
->s_flags
& SB_SYNCHRONOUS
)
122 gfs2_log_flush(sdp
, NULL
, GFS2_LOG_HEAD_FLUSH_NORMAL
|
125 sb_end_intwrite(sdp
->sd_vfs
);
128 static struct gfs2_bufdata
*gfs2_alloc_bufdata(struct gfs2_glock
*gl
,
129 struct buffer_head
*bh
)
131 struct gfs2_bufdata
*bd
;
133 bd
= kmem_cache_zalloc(gfs2_bufdata_cachep
, GFP_NOFS
| __GFP_NOFAIL
);
136 INIT_LIST_HEAD(&bd
->bd_list
);
142 * gfs2_trans_add_data - Add a databuf to the transaction.
143 * @gl: The inode glock associated with the buffer
144 * @bh: The buffer to add
146 * This is used in journaled data mode.
147 * We need to journal the data block in the same way as metadata in
148 * the functions above. The difference is that here we have a tag
149 * which is two __be64's being the block number (as per meta data)
150 * and a flag which says whether the data block needs escaping or
151 * not. This means we need a new log entry for each 251 or so data
152 * blocks, which isn't an enormous overhead but twice as much as
153 * for normal metadata blocks.
155 void gfs2_trans_add_data(struct gfs2_glock
*gl
, struct buffer_head
*bh
)
157 struct gfs2_trans
*tr
= current
->journal_info
;
158 struct gfs2_sbd
*sdp
= gl
->gl_name
.ln_sbd
;
159 struct gfs2_bufdata
*bd
;
162 if (buffer_pinned(bh
)) {
163 set_bit(TR_TOUCHED
, &tr
->tr_flags
);
169 gfs2_log_unlock(sdp
);
171 if (bh
->b_private
== NULL
)
172 bd
= gfs2_alloc_bufdata(gl
, bh
);
178 gfs2_assert(sdp
, bd
->bd_gl
== gl
);
179 set_bit(TR_TOUCHED
, &tr
->tr_flags
);
180 if (list_empty(&bd
->bd_list
)) {
181 set_bit(GLF_LFLUSH
, &bd
->bd_gl
->gl_flags
);
182 set_bit(GLF_DIRTY
, &bd
->bd_gl
->gl_flags
);
183 gfs2_pin(sdp
, bd
->bd_bh
);
184 tr
->tr_num_databuf_new
++;
185 list_add_tail(&bd
->bd_list
, &tr
->tr_databuf
);
187 gfs2_log_unlock(sdp
);
192 void gfs2_trans_add_meta(struct gfs2_glock
*gl
, struct buffer_head
*bh
)
195 struct gfs2_sbd
*sdp
= gl
->gl_name
.ln_sbd
;
196 struct gfs2_bufdata
*bd
;
197 struct gfs2_meta_header
*mh
;
198 struct gfs2_trans
*tr
= current
->journal_info
;
199 enum gfs2_freeze_state state
= atomic_read(&sdp
->sd_freeze_state
);
202 if (buffer_pinned(bh
)) {
203 set_bit(TR_TOUCHED
, &tr
->tr_flags
);
209 gfs2_log_unlock(sdp
);
211 lock_page(bh
->b_page
);
212 if (bh
->b_private
== NULL
)
213 bd
= gfs2_alloc_bufdata(gl
, bh
);
216 unlock_page(bh
->b_page
);
220 gfs2_assert(sdp
, bd
->bd_gl
== gl
);
221 set_bit(TR_TOUCHED
, &tr
->tr_flags
);
222 if (!list_empty(&bd
->bd_list
))
224 set_bit(GLF_LFLUSH
, &bd
->bd_gl
->gl_flags
);
225 set_bit(GLF_DIRTY
, &bd
->bd_gl
->gl_flags
);
226 mh
= (struct gfs2_meta_header
*)bd
->bd_bh
->b_data
;
227 if (unlikely(mh
->mh_magic
!= cpu_to_be32(GFS2_MAGIC
))) {
228 fs_err(sdp
, "Attempting to add uninitialised block to "
229 "journal (inplace block=%lld)\n",
230 (unsigned long long)bd
->bd_bh
->b_blocknr
);
233 if (unlikely(state
== SFS_FROZEN
)) {
234 fs_info(sdp
, "GFS2:adding buf while frozen\n");
235 gfs2_assert_withdraw(sdp
, 0);
237 if (unlikely(gfs2_withdrawn(sdp
))) {
238 fs_info(sdp
, "GFS2:adding buf while withdrawn! 0x%llx\n",
239 (unsigned long long)bd
->bd_bh
->b_blocknr
);
241 gfs2_pin(sdp
, bd
->bd_bh
);
242 mh
->__pad0
= cpu_to_be64(0);
243 mh
->mh_jid
= cpu_to_be32(sdp
->sd_jdesc
->jd_jid
);
244 list_add(&bd
->bd_list
, &tr
->tr_buf
);
245 tr
->tr_num_buf_new
++;
247 gfs2_log_unlock(sdp
);
252 void gfs2_trans_add_revoke(struct gfs2_sbd
*sdp
, struct gfs2_bufdata
*bd
)
254 struct gfs2_trans
*tr
= current
->journal_info
;
256 BUG_ON(!list_empty(&bd
->bd_list
));
257 gfs2_add_revoke(sdp
, bd
);
258 set_bit(TR_TOUCHED
, &tr
->tr_flags
);
262 void gfs2_trans_remove_revoke(struct gfs2_sbd
*sdp
, u64 blkno
, unsigned int len
)
264 struct gfs2_bufdata
*bd
, *tmp
;
265 struct gfs2_trans
*tr
= current
->journal_info
;
266 unsigned int n
= len
;
269 list_for_each_entry_safe(bd
, tmp
, &sdp
->sd_log_revokes
, bd_list
) {
270 if ((bd
->bd_blkno
>= blkno
) && (bd
->bd_blkno
< (blkno
+ len
))) {
271 list_del_init(&bd
->bd_list
);
272 gfs2_assert_withdraw(sdp
, sdp
->sd_log_num_revoke
);
273 sdp
->sd_log_num_revoke
--;
275 gfs2_glock_remove_revoke(bd
->bd_gl
);
276 kmem_cache_free(gfs2_bufdata_cachep
, bd
);
277 tr
->tr_num_revoke_rm
++;
282 gfs2_log_unlock(sdp
);
285 void gfs2_trans_free(struct gfs2_sbd
*sdp
, struct gfs2_trans
*tr
)
290 gfs2_assert_warn(sdp
, list_empty(&tr
->tr_ail1_list
));
291 gfs2_assert_warn(sdp
, list_empty(&tr
->tr_ail2_list
));
292 gfs2_assert_warn(sdp
, list_empty(&tr
->tr_databuf
));
293 gfs2_assert_warn(sdp
, list_empty(&tr
->tr_buf
));
294 kmem_cache_free(gfs2_trans_cachep
, tr
);