1 // SPDX-License-Identifier: GPL-2.0 <<
2 /* 1 /*
3 * Copyright (c) 2000-2003,2005 Silicon Graphi 2 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
4 * Copyright (C) 2010 Red Hat, Inc. 3 * Copyright (C) 2010 Red Hat, Inc.
5 * All Rights Reserved. 4 * All Rights Reserved.
>> 5 *
>> 6 * This program is free software; you can redistribute it and/or
>> 7 * modify it under the terms of the GNU General Public License as
>> 8 * published by the Free Software Foundation.
>> 9 *
>> 10 * This program is distributed in the hope that it would be useful,
>> 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
>> 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
>> 13 * GNU General Public License for more details.
>> 14 *
>> 15 * You should have received a copy of the GNU General Public License
>> 16 * along with this program; if not, write the Free Software Foundation,
>> 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
6 */ 18 */
7 #include "xfs.h" 19 #include "xfs.h"
8 #include "xfs_fs.h" 20 #include "xfs_fs.h"
9 #include "xfs_shared.h" 21 #include "xfs_shared.h"
10 #include "xfs_format.h" 22 #include "xfs_format.h"
11 #include "xfs_log_format.h" 23 #include "xfs_log_format.h"
12 #include "xfs_trans_resv.h" 24 #include "xfs_trans_resv.h"
13 #include "xfs_mount.h" 25 #include "xfs_mount.h"
>> 26 #include "xfs_inode.h"
14 #include "xfs_extent_busy.h" 27 #include "xfs_extent_busy.h"
15 #include "xfs_quota.h" 28 #include "xfs_quota.h"
16 #include "xfs_trans.h" 29 #include "xfs_trans.h"
17 #include "xfs_trans_priv.h" 30 #include "xfs_trans_priv.h"
18 #include "xfs_log.h" 31 #include "xfs_log.h"
19 #include "xfs_log_priv.h" <<
20 #include "xfs_trace.h" 32 #include "xfs_trace.h"
21 #include "xfs_error.h" 33 #include "xfs_error.h"
22 #include "xfs_defer.h" !! 34
23 #include "xfs_inode.h" !! 35 kmem_zone_t *xfs_trans_zone;
24 #include "xfs_dquot_item.h" !! 36 kmem_zone_t *xfs_log_item_desc_zone;
25 #include "xfs_dquot.h" <<
26 #include "xfs_icache.h" <<
27 #include "xfs_rtbitmap.h" <<
28 <<
29 struct kmem_cache *xfs_trans_cache; <<
30 <<
31 #if defined(CONFIG_TRACEPOINTS) <<
32 static void <<
33 xfs_trans_trace_reservations( <<
34 struct xfs_mount *mp) <<
35 { <<
36 struct xfs_trans_res *res; <<
37 struct xfs_trans_res *end_res; <<
38 int i; <<
39 <<
40 res = (struct xfs_trans_res *)M_RES(mp <<
41 end_res = (struct xfs_trans_res *)(M_R <<
42 for (i = 0; res < end_res; i++, res++) <<
43 trace_xfs_trans_resv_calc(mp, <<
44 } <<
45 #else <<
46 # define xfs_trans_trace_reservations(mp) <<
47 #endif <<
48 37
49 /* 38 /*
50 * Initialize the precomputed transaction rese 39 * Initialize the precomputed transaction reservation values
51 * in the mount structure. 40 * in the mount structure.
52 */ 41 */
53 void 42 void
54 xfs_trans_init( 43 xfs_trans_init(
55 struct xfs_mount *mp) 44 struct xfs_mount *mp)
56 { 45 {
57 xfs_trans_resv_calc(mp, M_RES(mp)); 46 xfs_trans_resv_calc(mp, M_RES(mp));
58 xfs_trans_trace_reservations(mp); <<
59 } 47 }
60 48
61 /* 49 /*
62 * Free the transaction structure. If there i 50 * Free the transaction structure. If there is more clean up
63 * to do when the structure is freed, add it h 51 * to do when the structure is freed, add it here.
64 */ 52 */
65 STATIC void 53 STATIC void
66 xfs_trans_free( 54 xfs_trans_free(
67 struct xfs_trans *tp) 55 struct xfs_trans *tp)
68 { 56 {
69 xfs_extent_busy_sort(&tp->t_busy); 57 xfs_extent_busy_sort(&tp->t_busy);
70 xfs_extent_busy_clear(tp->t_mountp, &t 58 xfs_extent_busy_clear(tp->t_mountp, &tp->t_busy, false);
71 59
72 trace_xfs_trans_free(tp, _RET_IP_); !! 60 atomic_dec(&tp->t_mountp->m_active_trans);
73 xfs_trans_clear_context(tp); <<
74 if (!(tp->t_flags & XFS_TRANS_NO_WRITE 61 if (!(tp->t_flags & XFS_TRANS_NO_WRITECOUNT))
75 sb_end_intwrite(tp->t_mountp-> 62 sb_end_intwrite(tp->t_mountp->m_super);
76 xfs_trans_free_dqinfo(tp); 63 xfs_trans_free_dqinfo(tp);
77 kmem_cache_free(xfs_trans_cache, tp); !! 64 kmem_zone_free(xfs_trans_zone, tp);
78 } 65 }
79 66
80 /* 67 /*
81 * This is called to create a new transaction 68 * This is called to create a new transaction which will share the
82 * permanent log reservation of the given tran 69 * permanent log reservation of the given transaction. The remaining
83 * unused block and rt extent reservations are 70 * unused block and rt extent reservations are also inherited. This
84 * implies that the original transaction is no 71 * implies that the original transaction is no longer allowed to allocate
85 * blocks. Locks and log items, however, are 72 * blocks. Locks and log items, however, are no inherited. They must
86 * be added to the new transaction explicitly. 73 * be added to the new transaction explicitly.
87 */ 74 */
88 STATIC struct xfs_trans * !! 75 STATIC xfs_trans_t *
89 xfs_trans_dup( 76 xfs_trans_dup(
90 struct xfs_trans *tp) !! 77 xfs_trans_t *tp)
91 { 78 {
92 struct xfs_trans *ntp; !! 79 xfs_trans_t *ntp;
93 <<
94 trace_xfs_trans_dup(tp, _RET_IP_); <<
95 80
96 ntp = kmem_cache_zalloc(xfs_trans_cach !! 81 ntp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP);
97 82
98 /* 83 /*
99 * Initialize the new transaction stru 84 * Initialize the new transaction structure.
100 */ 85 */
101 ntp->t_magic = XFS_TRANS_HEADER_MAGIC; 86 ntp->t_magic = XFS_TRANS_HEADER_MAGIC;
102 ntp->t_mountp = tp->t_mountp; 87 ntp->t_mountp = tp->t_mountp;
103 INIT_LIST_HEAD(&ntp->t_items); 88 INIT_LIST_HEAD(&ntp->t_items);
104 INIT_LIST_HEAD(&ntp->t_busy); 89 INIT_LIST_HEAD(&ntp->t_busy);
105 INIT_LIST_HEAD(&ntp->t_dfops); <<
106 ntp->t_highest_agno = NULLAGNUMBER; <<
107 90
108 ASSERT(tp->t_flags & XFS_TRANS_PERM_LO 91 ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
109 ASSERT(tp->t_ticket != NULL); 92 ASSERT(tp->t_ticket != NULL);
110 93
111 ntp->t_flags = XFS_TRANS_PERM_LOG_RES 94 ntp->t_flags = XFS_TRANS_PERM_LOG_RES |
112 (tp->t_flags & XFS_TRAN 95 (tp->t_flags & XFS_TRANS_RESERVE) |
113 (tp->t_flags & XFS_TRAN !! 96 (tp->t_flags & XFS_TRANS_NO_WRITECOUNT);
114 (tp->t_flags & XFS_TRAN <<
115 /* We gave our writer reference to the 97 /* We gave our writer reference to the new transaction */
116 tp->t_flags |= XFS_TRANS_NO_WRITECOUNT 98 tp->t_flags |= XFS_TRANS_NO_WRITECOUNT;
117 ntp->t_ticket = xfs_log_ticket_get(tp- 99 ntp->t_ticket = xfs_log_ticket_get(tp->t_ticket);
118 <<
119 ASSERT(tp->t_blk_res >= tp->t_blk_res_ <<
120 ntp->t_blk_res = tp->t_blk_res - tp->t 100 ntp->t_blk_res = tp->t_blk_res - tp->t_blk_res_used;
121 tp->t_blk_res = tp->t_blk_res_used; 101 tp->t_blk_res = tp->t_blk_res_used;
122 <<
123 ntp->t_rtx_res = tp->t_rtx_res - tp->t 102 ntp->t_rtx_res = tp->t_rtx_res - tp->t_rtx_res_used;
124 tp->t_rtx_res = tp->t_rtx_res_used; 103 tp->t_rtx_res = tp->t_rtx_res_used;
125 !! 104 ntp->t_pflags = tp->t_pflags;
126 xfs_trans_switch_context(tp, ntp); <<
127 <<
128 /* move deferred ops over to the new t <<
129 xfs_defer_move(ntp, tp); <<
130 105
131 xfs_trans_dup_dqinfo(tp, ntp); 106 xfs_trans_dup_dqinfo(tp, ntp);
>> 107
>> 108 atomic_inc(&tp->t_mountp->m_active_trans);
132 return ntp; 109 return ntp;
133 } 110 }
134 111
135 /* 112 /*
136 * This is called to reserve free disk blocks 113 * This is called to reserve free disk blocks and log space for the
137 * given transaction. This must be done befor 114 * given transaction. This must be done before allocating any resources
138 * within the transaction. 115 * within the transaction.
139 * 116 *
140 * This will return ENOSPC if there are not en 117 * This will return ENOSPC if there are not enough blocks available.
141 * It will sleep waiting for available log spa 118 * It will sleep waiting for available log space.
142 * The only valid value for the flags paramete 119 * The only valid value for the flags parameter is XFS_RES_LOG_PERM, which
143 * is used by long running transactions. If a 120 * is used by long running transactions. If any one of the reservations
144 * fails then they will all be backed out. 121 * fails then they will all be backed out.
145 * 122 *
146 * This does not do quota reservations. That t 123 * This does not do quota reservations. That typically is done by the
147 * caller afterwards. 124 * caller afterwards.
148 */ 125 */
149 static int 126 static int
150 xfs_trans_reserve( 127 xfs_trans_reserve(
151 struct xfs_trans *tp, 128 struct xfs_trans *tp,
152 struct xfs_trans_res *resp, 129 struct xfs_trans_res *resp,
153 uint blocks, 130 uint blocks,
154 uint rtextents) 131 uint rtextents)
155 { 132 {
156 struct xfs_mount *mp = tp->t_mo !! 133 int error = 0;
157 int error = 0; !! 134 bool rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0;
158 bool rsvd = (tp->t_ !! 135
>> 136 /* Mark this thread as being in a transaction */
>> 137 current_set_flags_nested(&tp->t_pflags, PF_FSTRANS);
159 138
160 /* 139 /*
161 * Attempt to reserve the needed disk 140 * Attempt to reserve the needed disk blocks by decrementing
162 * the number needed from the number a 141 * the number needed from the number available. This will
163 * fail if the count would go below ze 142 * fail if the count would go below zero.
164 */ 143 */
165 if (blocks > 0) { 144 if (blocks > 0) {
166 error = xfs_dec_fdblocks(mp, b !! 145 error = xfs_mod_fdblocks(tp->t_mountp, -((int64_t)blocks), rsvd);
167 if (error != 0) !! 146 if (error != 0) {
>> 147 current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
168 return -ENOSPC; 148 return -ENOSPC;
>> 149 }
169 tp->t_blk_res += blocks; 150 tp->t_blk_res += blocks;
170 } 151 }
171 152
172 /* 153 /*
173 * Reserve the log space needed for th 154 * Reserve the log space needed for this transaction.
174 */ 155 */
175 if (resp->tr_logres > 0) { 156 if (resp->tr_logres > 0) {
176 bool permanent = false; 157 bool permanent = false;
177 158
178 ASSERT(tp->t_log_res == 0 || 159 ASSERT(tp->t_log_res == 0 ||
179 tp->t_log_res == resp-> 160 tp->t_log_res == resp->tr_logres);
180 ASSERT(tp->t_log_count == 0 || 161 ASSERT(tp->t_log_count == 0 ||
181 tp->t_log_count == resp 162 tp->t_log_count == resp->tr_logcount);
182 163
183 if (resp->tr_logflags & XFS_TR 164 if (resp->tr_logflags & XFS_TRANS_PERM_LOG_RES) {
184 tp->t_flags |= XFS_TRA 165 tp->t_flags |= XFS_TRANS_PERM_LOG_RES;
185 permanent = true; 166 permanent = true;
186 } else { 167 } else {
187 ASSERT(tp->t_ticket == 168 ASSERT(tp->t_ticket == NULL);
188 ASSERT(!(tp->t_flags & 169 ASSERT(!(tp->t_flags & XFS_TRANS_PERM_LOG_RES));
189 } 170 }
190 171
191 if (tp->t_ticket != NULL) { 172 if (tp->t_ticket != NULL) {
192 ASSERT(resp->tr_logfla 173 ASSERT(resp->tr_logflags & XFS_TRANS_PERM_LOG_RES);
193 error = xfs_log_regran !! 174 error = xfs_log_regrant(tp->t_mountp, tp->t_ticket);
194 } else { 175 } else {
195 error = xfs_log_reserv !! 176 error = xfs_log_reserve(tp->t_mountp,
>> 177 resp->tr_logres,
196 178 resp->tr_logcount,
197 !! 179 &tp->t_ticket, XFS_TRANSACTION,
>> 180 permanent);
198 } 181 }
199 182
200 if (error) 183 if (error)
201 goto undo_blocks; 184 goto undo_blocks;
202 185
203 tp->t_log_res = resp->tr_logre 186 tp->t_log_res = resp->tr_logres;
204 tp->t_log_count = resp->tr_log 187 tp->t_log_count = resp->tr_logcount;
205 } 188 }
206 189
207 /* 190 /*
208 * Attempt to reserve the needed realt 191 * Attempt to reserve the needed realtime extents by decrementing
209 * the number needed from the number a 192 * the number needed from the number available. This will
210 * fail if the count would go below ze 193 * fail if the count would go below zero.
211 */ 194 */
212 if (rtextents > 0) { 195 if (rtextents > 0) {
213 error = xfs_dec_frextents(mp, !! 196 error = xfs_mod_frextents(tp->t_mountp, -((int64_t)rtextents));
214 if (error) { 197 if (error) {
215 error = -ENOSPC; 198 error = -ENOSPC;
216 goto undo_log; 199 goto undo_log;
217 } 200 }
218 tp->t_rtx_res += rtextents; 201 tp->t_rtx_res += rtextents;
219 } 202 }
220 203
221 return 0; 204 return 0;
222 205
223 /* 206 /*
224 * Error cases jump to one of these la 207 * Error cases jump to one of these labels to undo any
225 * reservations which have already bee 208 * reservations which have already been performed.
226 */ 209 */
227 undo_log: 210 undo_log:
228 if (resp->tr_logres > 0) { 211 if (resp->tr_logres > 0) {
229 xfs_log_ticket_ungrant(mp->m_l !! 212 xfs_log_done(tp->t_mountp, tp->t_ticket, NULL, false);
230 tp->t_ticket = NULL; 213 tp->t_ticket = NULL;
231 tp->t_log_res = 0; 214 tp->t_log_res = 0;
232 tp->t_flags &= ~XFS_TRANS_PERM 215 tp->t_flags &= ~XFS_TRANS_PERM_LOG_RES;
233 } 216 }
234 217
235 undo_blocks: 218 undo_blocks:
236 if (blocks > 0) { 219 if (blocks > 0) {
237 xfs_add_fdblocks(mp, blocks); !! 220 xfs_mod_fdblocks(tp->t_mountp, (int64_t)blocks, rsvd);
238 tp->t_blk_res = 0; 221 tp->t_blk_res = 0;
239 } 222 }
>> 223
>> 224 current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
>> 225
240 return error; 226 return error;
241 } 227 }
242 228
243 int 229 int
244 xfs_trans_alloc( 230 xfs_trans_alloc(
245 struct xfs_mount *mp, 231 struct xfs_mount *mp,
246 struct xfs_trans_res *resp, 232 struct xfs_trans_res *resp,
247 uint blocks, 233 uint blocks,
248 uint rtextents, 234 uint rtextents,
249 uint flags, 235 uint flags,
250 struct xfs_trans **tpp) 236 struct xfs_trans **tpp)
251 { 237 {
252 struct xfs_trans *tp; 238 struct xfs_trans *tp;
253 bool want_retry = t <<
254 int error; 239 int error;
255 240
256 /* <<
257 * Allocate the handle before we do ou <<
258 * GFP_NOFS allocation context so that <<
259 * by doing GFP_KERNEL allocations ins <<
260 */ <<
261 retry: <<
262 tp = kmem_cache_zalloc(xfs_trans_cache <<
263 if (!(flags & XFS_TRANS_NO_WRITECOUNT) 241 if (!(flags & XFS_TRANS_NO_WRITECOUNT))
264 sb_start_intwrite(mp->m_super) 242 sb_start_intwrite(mp->m_super);
265 xfs_trans_set_context(tp); <<
266 243
267 /* !! 244 WARN_ON(mp->m_super->s_writers.frozen == SB_FREEZE_COMPLETE);
268 * Zero-reservation ("empty") transact !! 245 atomic_inc(&mp->m_active_trans);
269 * they're allowed to run while we're <<
270 */ <<
271 WARN_ON(resp->tr_logres > 0 && <<
272 mp->m_super->s_writers.frozen <<
273 ASSERT(!(flags & XFS_TRANS_RES_FDBLKS) <<
274 xfs_has_lazysbcount(mp)); <<
275 246
>> 247 tp = kmem_zone_zalloc(xfs_trans_zone,
>> 248 (flags & XFS_TRANS_NOFS) ? KM_NOFS : KM_SLEEP);
276 tp->t_magic = XFS_TRANS_HEADER_MAGIC; 249 tp->t_magic = XFS_TRANS_HEADER_MAGIC;
277 tp->t_flags = flags; 250 tp->t_flags = flags;
278 tp->t_mountp = mp; 251 tp->t_mountp = mp;
279 INIT_LIST_HEAD(&tp->t_items); 252 INIT_LIST_HEAD(&tp->t_items);
280 INIT_LIST_HEAD(&tp->t_busy); 253 INIT_LIST_HEAD(&tp->t_busy);
281 INIT_LIST_HEAD(&tp->t_dfops); <<
282 tp->t_highest_agno = NULLAGNUMBER; <<
283 254
284 error = xfs_trans_reserve(tp, resp, bl 255 error = xfs_trans_reserve(tp, resp, blocks, rtextents);
285 if (error == -ENOSPC && want_retry) { <<
286 xfs_trans_cancel(tp); <<
287 <<
288 /* <<
289 * We weren't able to reserve <<
290 * Flush the other speculative <<
291 * Do not perform a synchronou <<
292 * other locks. <<
293 */ <<
294 error = xfs_blockgc_flush_all( <<
295 if (error) <<
296 return error; <<
297 want_retry = false; <<
298 goto retry; <<
299 } <<
300 if (error) { 256 if (error) {
301 xfs_trans_cancel(tp); 257 xfs_trans_cancel(tp);
302 return error; 258 return error;
303 } 259 }
304 260
305 trace_xfs_trans_alloc(tp, _RET_IP_); <<
306 <<
307 *tpp = tp; 261 *tpp = tp;
308 return 0; 262 return 0;
309 } 263 }
310 264
311 /* 265 /*
312 * Create an empty transaction with no reserva 266 * Create an empty transaction with no reservation. This is a defensive
313 * mechanism for routines that query metadata !! 267 * mechanism for routines that query metadata without actually modifying
314 * if the metadata being queried is somehow cr !! 268 * them -- if the metadata being queried is somehow cross-linked (think a
315 * pointer that points higher in the tree), we !! 269 * btree block pointer that points higher in the tree), we risk deadlock.
316 * grabbed as part of a transaction can be re- !! 270 * However, blocks grabbed as part of a transaction can be re-grabbed.
317 * notice the corrupt block and the operation !! 271 * The verifiers will notice the corrupt block and the operation will fail
318 * without deadlocking. !! 272 * back to userspace without deadlocking.
319 * <<
320 * Note the zero-length reservation; this tran <<
321 * any dirty data. <<
322 * 273 *
323 * Callers should obtain freeze protection to !! 274 * Note the zero-length reservation; this transaction MUST be cancelled
324 * where we can be grabbing buffers at the sam !! 275 * without any dirty data.
325 * drain the buffer LRU list. <<
326 */ 276 */
327 int 277 int
328 xfs_trans_alloc_empty( 278 xfs_trans_alloc_empty(
329 struct xfs_mount *mp, 279 struct xfs_mount *mp,
330 struct xfs_trans **tpp) 280 struct xfs_trans **tpp)
331 { 281 {
332 struct xfs_trans_res resv = 282 struct xfs_trans_res resv = {0};
333 283
334 return xfs_trans_alloc(mp, &resv, 0, 0 284 return xfs_trans_alloc(mp, &resv, 0, 0, XFS_TRANS_NO_WRITECOUNT, tpp);
335 } 285 }
336 286
337 /* 287 /*
338 * Record the indicated change to the given fi 288 * Record the indicated change to the given field for application
339 * to the file system's superblock when the tr 289 * to the file system's superblock when the transaction commits.
340 * For now, just store the change in the trans 290 * For now, just store the change in the transaction structure.
341 * 291 *
342 * Mark the transaction structure to indicate 292 * Mark the transaction structure to indicate that the superblock
343 * needs to be updated before committing. 293 * needs to be updated before committing.
344 * 294 *
345 * Because we may not be keeping track of allo 295 * Because we may not be keeping track of allocated/free inodes and
346 * used filesystem blocks in the superblock, w 296 * used filesystem blocks in the superblock, we do not mark the
347 * superblock dirty in this transaction if we 297 * superblock dirty in this transaction if we modify these fields.
348 * We still need to update the transaction del 298 * We still need to update the transaction deltas so that they get
349 * applied to the incore superblock, but we do 299 * applied to the incore superblock, but we don't want them to
350 * cause the superblock to get locked and logg 300 * cause the superblock to get locked and logged if these are the
351 * only fields in the superblock that the tran 301 * only fields in the superblock that the transaction modifies.
352 */ 302 */
353 void 303 void
354 xfs_trans_mod_sb( 304 xfs_trans_mod_sb(
355 xfs_trans_t *tp, 305 xfs_trans_t *tp,
356 uint field, 306 uint field,
357 int64_t delta) 307 int64_t delta)
358 { 308 {
359 uint32_t flags = (XFS_TRANS_DIR 309 uint32_t flags = (XFS_TRANS_DIRTY|XFS_TRANS_SB_DIRTY);
360 xfs_mount_t *mp = tp->t_mountp; 310 xfs_mount_t *mp = tp->t_mountp;
361 311
362 switch (field) { 312 switch (field) {
363 case XFS_TRANS_SB_ICOUNT: 313 case XFS_TRANS_SB_ICOUNT:
364 tp->t_icount_delta += delta; 314 tp->t_icount_delta += delta;
365 if (xfs_has_lazysbcount(mp)) !! 315 if (xfs_sb_version_haslazysbcount(&mp->m_sb))
366 flags &= ~XFS_TRANS_SB 316 flags &= ~XFS_TRANS_SB_DIRTY;
367 break; 317 break;
368 case XFS_TRANS_SB_IFREE: 318 case XFS_TRANS_SB_IFREE:
369 tp->t_ifree_delta += delta; 319 tp->t_ifree_delta += delta;
370 if (xfs_has_lazysbcount(mp)) !! 320 if (xfs_sb_version_haslazysbcount(&mp->m_sb))
371 flags &= ~XFS_TRANS_SB 321 flags &= ~XFS_TRANS_SB_DIRTY;
372 break; 322 break;
373 case XFS_TRANS_SB_FDBLOCKS: 323 case XFS_TRANS_SB_FDBLOCKS:
374 /* 324 /*
375 * Track the number of blocks !! 325 * Track the number of blocks allocated in the
376 * Make sure it does not excee !! 326 * transaction. Make sure it does not exceed the
377 * shutdown as this can lead t !! 327 * number reserved.
378 */ 328 */
379 if (delta < 0) { 329 if (delta < 0) {
380 tp->t_blk_res_used += 330 tp->t_blk_res_used += (uint)-delta;
381 if (tp->t_blk_res_used !! 331 ASSERT(tp->t_blk_res_used <= tp->t_blk_res);
382 xfs_force_shut <<
383 } else if (delta > 0 && (tp->t <<
384 int64_t blkres_delta; <<
385 <<
386 /* <<
387 * Return freed blocks <<
388 * instead of the glob <<
389 * overflow the trans <<
390 * reservation across <<
391 * repeatedly free and <<
392 */ <<
393 blkres_delta = min_t(i <<
394 U <<
395 tp->t_blk_res += blkre <<
396 delta -= blkres_delta; <<
397 } 332 }
398 tp->t_fdblocks_delta += delta; 333 tp->t_fdblocks_delta += delta;
399 if (xfs_has_lazysbcount(mp)) !! 334 if (xfs_sb_version_haslazysbcount(&mp->m_sb))
400 flags &= ~XFS_TRANS_SB 335 flags &= ~XFS_TRANS_SB_DIRTY;
401 break; 336 break;
402 case XFS_TRANS_SB_RES_FDBLOCKS: 337 case XFS_TRANS_SB_RES_FDBLOCKS:
403 /* 338 /*
404 * The allocation has already 339 * The allocation has already been applied to the
405 * in-core superblock's counte 340 * in-core superblock's counter. This should only
406 * be applied to the on-disk s 341 * be applied to the on-disk superblock.
407 */ 342 */
408 tp->t_res_fdblocks_delta += de 343 tp->t_res_fdblocks_delta += delta;
409 if (xfs_has_lazysbcount(mp)) !! 344 if (xfs_sb_version_haslazysbcount(&mp->m_sb))
410 flags &= ~XFS_TRANS_SB 345 flags &= ~XFS_TRANS_SB_DIRTY;
411 break; 346 break;
412 case XFS_TRANS_SB_FREXTENTS: 347 case XFS_TRANS_SB_FREXTENTS:
413 /* 348 /*
414 * Track the number of blocks 349 * Track the number of blocks allocated in the
415 * transaction. Make sure it 350 * transaction. Make sure it does not exceed the
416 * number reserved. 351 * number reserved.
417 */ 352 */
418 if (delta < 0) { 353 if (delta < 0) {
419 tp->t_rtx_res_used += 354 tp->t_rtx_res_used += (uint)-delta;
420 ASSERT(tp->t_rtx_res_u 355 ASSERT(tp->t_rtx_res_used <= tp->t_rtx_res);
421 } 356 }
422 tp->t_frextents_delta += delta 357 tp->t_frextents_delta += delta;
423 break; 358 break;
424 case XFS_TRANS_SB_RES_FREXTENTS: 359 case XFS_TRANS_SB_RES_FREXTENTS:
425 /* 360 /*
426 * The allocation has already 361 * The allocation has already been applied to the
427 * in-core superblock's counte 362 * in-core superblock's counter. This should only
428 * be applied to the on-disk s 363 * be applied to the on-disk superblock.
429 */ 364 */
430 ASSERT(delta < 0); 365 ASSERT(delta < 0);
431 tp->t_res_frextents_delta += d 366 tp->t_res_frextents_delta += delta;
432 break; 367 break;
433 case XFS_TRANS_SB_DBLOCKS: 368 case XFS_TRANS_SB_DBLOCKS:
>> 369 ASSERT(delta > 0);
434 tp->t_dblocks_delta += delta; 370 tp->t_dblocks_delta += delta;
435 break; 371 break;
436 case XFS_TRANS_SB_AGCOUNT: 372 case XFS_TRANS_SB_AGCOUNT:
437 ASSERT(delta > 0); 373 ASSERT(delta > 0);
438 tp->t_agcount_delta += delta; 374 tp->t_agcount_delta += delta;
439 break; 375 break;
440 case XFS_TRANS_SB_IMAXPCT: 376 case XFS_TRANS_SB_IMAXPCT:
441 tp->t_imaxpct_delta += delta; 377 tp->t_imaxpct_delta += delta;
442 break; 378 break;
443 case XFS_TRANS_SB_REXTSIZE: 379 case XFS_TRANS_SB_REXTSIZE:
444 tp->t_rextsize_delta += delta; 380 tp->t_rextsize_delta += delta;
445 break; 381 break;
446 case XFS_TRANS_SB_RBMBLOCKS: 382 case XFS_TRANS_SB_RBMBLOCKS:
447 tp->t_rbmblocks_delta += delta 383 tp->t_rbmblocks_delta += delta;
448 break; 384 break;
449 case XFS_TRANS_SB_RBLOCKS: 385 case XFS_TRANS_SB_RBLOCKS:
450 tp->t_rblocks_delta += delta; 386 tp->t_rblocks_delta += delta;
451 break; 387 break;
452 case XFS_TRANS_SB_REXTENTS: 388 case XFS_TRANS_SB_REXTENTS:
453 tp->t_rextents_delta += delta; 389 tp->t_rextents_delta += delta;
454 break; 390 break;
455 case XFS_TRANS_SB_REXTSLOG: 391 case XFS_TRANS_SB_REXTSLOG:
456 tp->t_rextslog_delta += delta; 392 tp->t_rextslog_delta += delta;
457 break; 393 break;
458 default: 394 default:
459 ASSERT(0); 395 ASSERT(0);
460 return; 396 return;
461 } 397 }
462 398
463 tp->t_flags |= flags; 399 tp->t_flags |= flags;
464 } 400 }
465 401
466 /* 402 /*
467 * xfs_trans_apply_sb_deltas() is called from 403 * xfs_trans_apply_sb_deltas() is called from the commit code
468 * to bring the superblock buffer into the cur 404 * to bring the superblock buffer into the current transaction
469 * and modify it as requested by earlier calls 405 * and modify it as requested by earlier calls to xfs_trans_mod_sb().
470 * 406 *
471 * For now we just look at each field allowed 407 * For now we just look at each field allowed to change and change
472 * it if necessary. 408 * it if necessary.
473 */ 409 */
474 STATIC void 410 STATIC void
475 xfs_trans_apply_sb_deltas( 411 xfs_trans_apply_sb_deltas(
476 xfs_trans_t *tp) 412 xfs_trans_t *tp)
477 { 413 {
478 struct xfs_dsb *sbp; !! 414 xfs_dsb_t *sbp;
479 struct xfs_buf *bp; !! 415 xfs_buf_t *bp;
480 int whole = 0; 416 int whole = 0;
481 417
482 bp = xfs_trans_getsb(tp); !! 418 bp = xfs_trans_getsb(tp, tp->t_mountp, 0);
483 sbp = bp->b_addr; !! 419 sbp = XFS_BUF_TO_SBP(bp);
>> 420
>> 421 /*
>> 422 * Check that superblock mods match the mods made to AGF counters.
>> 423 */
>> 424 ASSERT((tp->t_fdblocks_delta + tp->t_res_fdblocks_delta) ==
>> 425 (tp->t_ag_freeblks_delta + tp->t_ag_flist_delta +
>> 426 tp->t_ag_btree_delta));
484 427
485 /* 428 /*
486 * Only update the superblock counters 429 * Only update the superblock counters if we are logging them
487 */ 430 */
488 if (!xfs_has_lazysbcount((tp->t_mountp !! 431 if (!xfs_sb_version_haslazysbcount(&(tp->t_mountp->m_sb))) {
489 if (tp->t_icount_delta) 432 if (tp->t_icount_delta)
490 be64_add_cpu(&sbp->sb_ 433 be64_add_cpu(&sbp->sb_icount, tp->t_icount_delta);
491 if (tp->t_ifree_delta) 434 if (tp->t_ifree_delta)
492 be64_add_cpu(&sbp->sb_ 435 be64_add_cpu(&sbp->sb_ifree, tp->t_ifree_delta);
493 if (tp->t_fdblocks_delta) 436 if (tp->t_fdblocks_delta)
494 be64_add_cpu(&sbp->sb_ 437 be64_add_cpu(&sbp->sb_fdblocks, tp->t_fdblocks_delta);
495 if (tp->t_res_fdblocks_delta) 438 if (tp->t_res_fdblocks_delta)
496 be64_add_cpu(&sbp->sb_ 439 be64_add_cpu(&sbp->sb_fdblocks, tp->t_res_fdblocks_delta);
497 } 440 }
498 441
499 /* !! 442 if (tp->t_frextents_delta)
500 * Updating frextents requires careful !! 443 be64_add_cpu(&sbp->sb_frextents, tp->t_frextents_delta);
501 * behave like the lazysb counters bec !! 444 if (tp->t_res_frextents_delta)
502 * recovery in older kenels to recompu !! 445 be64_add_cpu(&sbp->sb_frextents, tp->t_res_frextents_delta);
503 * This means that the ondisk frextent <<
504 * rtbitmap. <<
505 * <<
506 * Therefore, log the frextents change <<
507 * update the incore superblock so tha <<
508 * write the correct value ondisk. <<
509 * <<
510 * Don't touch m_frextents because it <<
511 * and those are handled by the unrese <<
512 */ <<
513 if (tp->t_frextents_delta || tp->t_res <<
514 struct xfs_mount *mp = <<
515 int64_t rtxdel <<
516 <<
517 rtxdelta = tp->t_frextents_del <<
518 <<
519 spin_lock(&mp->m_sb_lock); <<
520 be64_add_cpu(&sbp->sb_frextent <<
521 mp->m_sb.sb_frextents += rtxde <<
522 spin_unlock(&mp->m_sb_lock); <<
523 } <<
524 446
525 if (tp->t_dblocks_delta) { 447 if (tp->t_dblocks_delta) {
526 be64_add_cpu(&sbp->sb_dblocks, 448 be64_add_cpu(&sbp->sb_dblocks, tp->t_dblocks_delta);
527 whole = 1; 449 whole = 1;
528 } 450 }
529 if (tp->t_agcount_delta) { 451 if (tp->t_agcount_delta) {
530 be32_add_cpu(&sbp->sb_agcount, 452 be32_add_cpu(&sbp->sb_agcount, tp->t_agcount_delta);
531 whole = 1; 453 whole = 1;
532 } 454 }
533 if (tp->t_imaxpct_delta) { 455 if (tp->t_imaxpct_delta) {
534 sbp->sb_imax_pct += tp->t_imax 456 sbp->sb_imax_pct += tp->t_imaxpct_delta;
535 whole = 1; 457 whole = 1;
536 } 458 }
537 if (tp->t_rextsize_delta) { 459 if (tp->t_rextsize_delta) {
538 be32_add_cpu(&sbp->sb_rextsize 460 be32_add_cpu(&sbp->sb_rextsize, tp->t_rextsize_delta);
539 whole = 1; 461 whole = 1;
540 } 462 }
541 if (tp->t_rbmblocks_delta) { 463 if (tp->t_rbmblocks_delta) {
542 be32_add_cpu(&sbp->sb_rbmblock 464 be32_add_cpu(&sbp->sb_rbmblocks, tp->t_rbmblocks_delta);
543 whole = 1; 465 whole = 1;
544 } 466 }
545 if (tp->t_rblocks_delta) { 467 if (tp->t_rblocks_delta) {
546 be64_add_cpu(&sbp->sb_rblocks, 468 be64_add_cpu(&sbp->sb_rblocks, tp->t_rblocks_delta);
547 whole = 1; 469 whole = 1;
548 } 470 }
549 if (tp->t_rextents_delta) { 471 if (tp->t_rextents_delta) {
550 be64_add_cpu(&sbp->sb_rextents 472 be64_add_cpu(&sbp->sb_rextents, tp->t_rextents_delta);
551 whole = 1; 473 whole = 1;
552 } 474 }
553 if (tp->t_rextslog_delta) { 475 if (tp->t_rextslog_delta) {
554 sbp->sb_rextslog += tp->t_rext 476 sbp->sb_rextslog += tp->t_rextslog_delta;
555 whole = 1; 477 whole = 1;
556 } 478 }
557 479
558 xfs_trans_buf_set_type(tp, bp, XFS_BLF 480 xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF);
559 if (whole) 481 if (whole)
560 /* 482 /*
561 * Log the whole thing, the fi 483 * Log the whole thing, the fields are noncontiguous.
562 */ 484 */
563 xfs_trans_log_buf(tp, bp, 0, s !! 485 xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_dsb_t) - 1);
564 else 486 else
565 /* 487 /*
566 * Since all the modifiable fi 488 * Since all the modifiable fields are contiguous, we
567 * can get away with this. 489 * can get away with this.
568 */ 490 */
569 xfs_trans_log_buf(tp, bp, offs !! 491 xfs_trans_log_buf(tp, bp, offsetof(xfs_dsb_t, sb_icount),
570 offsetof(str !! 492 offsetof(xfs_dsb_t, sb_frextents) +
571 sizeof(sbp-> 493 sizeof(sbp->sb_frextents) - 1);
572 } 494 }
573 495
>> 496 STATIC int
>> 497 xfs_sb_mod8(
>> 498 uint8_t *field,
>> 499 int8_t delta)
>> 500 {
>> 501 int8_t counter = *field;
>> 502
>> 503 counter += delta;
>> 504 if (counter < 0) {
>> 505 ASSERT(0);
>> 506 return -EINVAL;
>> 507 }
>> 508 *field = counter;
>> 509 return 0;
>> 510 }
>> 511
>> 512 STATIC int
>> 513 xfs_sb_mod32(
>> 514 uint32_t *field,
>> 515 int32_t delta)
>> 516 {
>> 517 int32_t counter = *field;
>> 518
>> 519 counter += delta;
>> 520 if (counter < 0) {
>> 521 ASSERT(0);
>> 522 return -EINVAL;
>> 523 }
>> 524 *field = counter;
>> 525 return 0;
>> 526 }
>> 527
>> 528 STATIC int
>> 529 xfs_sb_mod64(
>> 530 uint64_t *field,
>> 531 int64_t delta)
>> 532 {
>> 533 int64_t counter = *field;
>> 534
>> 535 counter += delta;
>> 536 if (counter < 0) {
>> 537 ASSERT(0);
>> 538 return -EINVAL;
>> 539 }
>> 540 *field = counter;
>> 541 return 0;
>> 542 }
>> 543
574 /* 544 /*
575 * xfs_trans_unreserve_and_mod_sb() is called !! 545 * xfs_trans_unreserve_and_mod_sb() is called to release unused reservations
576 * apply superblock counter changes to the in- !! 546 * and apply superblock counter changes to the in-core superblock. The
577 * t_res_fdblocks_delta and t_res_frextents_de 547 * t_res_fdblocks_delta and t_res_frextents_delta fields are explicitly NOT
578 * applied to the in-core superblock. The ide 548 * applied to the in-core superblock. The idea is that that has already been
579 * done. 549 * done.
580 * 550 *
581 * If we are not logging superblock counters, 551 * If we are not logging superblock counters, then the inode allocated/free and
582 * used block counts are not updated in the on 552 * used block counts are not updated in the on disk superblock. In this case,
583 * XFS_TRANS_SB_DIRTY will not be set when the 553 * XFS_TRANS_SB_DIRTY will not be set when the transaction is updated but we
584 * still need to update the incore superblock 554 * still need to update the incore superblock with the changes.
585 * <<
586 * Deltas for the inode count are +/-64, hence <<
587 * so we don't need to take the counter lock o <<
588 */ 555 */
589 #define XFS_ICOUNT_BATCH 128 <<
590 <<
591 void 556 void
592 xfs_trans_unreserve_and_mod_sb( 557 xfs_trans_unreserve_and_mod_sb(
593 struct xfs_trans *tp) 558 struct xfs_trans *tp)
594 { 559 {
595 struct xfs_mount *mp = tp->t_mo 560 struct xfs_mount *mp = tp->t_mountp;
596 int64_t blkdelta = tp- !! 561 bool rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0;
597 int64_t rtxdelta = tp- !! 562 int64_t blkdelta = 0;
>> 563 int64_t rtxdelta = 0;
598 int64_t idelta = 0; 564 int64_t idelta = 0;
599 int64_t ifreedelta = 0 565 int64_t ifreedelta = 0;
>> 566 int error;
600 567
601 /* !! 568 /* calculate deltas */
602 * Calculate the deltas. !! 569 if (tp->t_blk_res > 0)
603 * !! 570 blkdelta = tp->t_blk_res;
604 * t_fdblocks_delta and t_frextents_de !! 571 if ((tp->t_fdblocks_delta != 0) &&
605 * !! 572 (xfs_sb_version_haslazysbcount(&mp->m_sb) ||
606 * - positive values indicate blocks !! 573 (tp->t_flags & XFS_TRANS_SB_DIRTY)))
607 * - negative values indicate blocks <<
608 * <<
609 * Negative values can only happen if <<
610 * reservation that covers the allocat <<
611 * that the calculated delta values mu <<
612 * can only put back previous allocate <<
613 */ <<
614 ASSERT(tp->t_blk_res || tp->t_fdblocks <<
615 if (xfs_has_lazysbcount(mp) || (tp->t_ <<
616 blkdelta += tp->t_fdblocks_del 574 blkdelta += tp->t_fdblocks_delta;
617 ASSERT(blkdelta >= 0); <<
618 } <<
619 575
620 ASSERT(tp->t_rtx_res || tp->t_frextent !! 576 if (tp->t_rtx_res > 0)
621 if (tp->t_flags & XFS_TRANS_SB_DIRTY) !! 577 rtxdelta = tp->t_rtx_res;
>> 578 if ((tp->t_frextents_delta != 0) &&
>> 579 (tp->t_flags & XFS_TRANS_SB_DIRTY))
622 rtxdelta += tp->t_frextents_de 580 rtxdelta += tp->t_frextents_delta;
623 ASSERT(rtxdelta >= 0); <<
624 } <<
625 581
626 if (xfs_has_lazysbcount(mp) || (tp->t_ !! 582 if (xfs_sb_version_haslazysbcount(&mp->m_sb) ||
>> 583 (tp->t_flags & XFS_TRANS_SB_DIRTY)) {
627 idelta = tp->t_icount_delta; 584 idelta = tp->t_icount_delta;
628 ifreedelta = tp->t_ifree_delta 585 ifreedelta = tp->t_ifree_delta;
629 } 586 }
630 587
631 /* apply the per-cpu counters */ 588 /* apply the per-cpu counters */
632 if (blkdelta) !! 589 if (blkdelta) {
633 xfs_add_fdblocks(mp, blkdelta) !! 590 error = xfs_mod_fdblocks(mp, blkdelta, rsvd);
634 !! 591 if (error)
635 if (idelta) !! 592 goto out;
636 percpu_counter_add_batch(&mp-> !! 593 }
637 XFS_I <<
638 594
639 if (ifreedelta) !! 595 if (idelta) {
640 percpu_counter_add(&mp->m_ifre !! 596 error = xfs_mod_icount(mp, idelta);
>> 597 if (error)
>> 598 goto out_undo_fdblocks;
>> 599 }
641 600
642 if (rtxdelta) !! 601 if (ifreedelta) {
643 xfs_add_frextents(mp, rtxdelta !! 602 error = xfs_mod_ifree(mp, ifreedelta);
>> 603 if (error)
>> 604 goto out_undo_icount;
>> 605 }
644 606
645 if (!(tp->t_flags & XFS_TRANS_SB_DIRTY !! 607 if (rtxdelta == 0 && !(tp->t_flags & XFS_TRANS_SB_DIRTY))
646 return; 608 return;
647 609
648 /* apply remaining deltas */ 610 /* apply remaining deltas */
649 spin_lock(&mp->m_sb_lock); 611 spin_lock(&mp->m_sb_lock);
650 mp->m_sb.sb_fdblocks += tp->t_fdblocks !! 612 if (rtxdelta) {
651 mp->m_sb.sb_icount += idelta; !! 613 error = xfs_sb_mod64(&mp->m_sb.sb_frextents, rtxdelta);
652 mp->m_sb.sb_ifree += ifreedelta; !! 614 if (error)
653 /* !! 615 goto out_undo_ifree;
654 * Do not touch sb_frextents here beca !! 616 }
655 * reservation. sb_frextents is not p !! 617
656 * must be consistent with the ondisk !! 618 if (tp->t_dblocks_delta != 0) {
657 * incore reservations. !! 619 error = xfs_sb_mod64(&mp->m_sb.sb_dblocks, tp->t_dblocks_delta);
658 */ !! 620 if (error)
659 mp->m_sb.sb_dblocks += tp->t_dblocks_d !! 621 goto out_undo_frextents;
660 mp->m_sb.sb_agcount += tp->t_agcount_d !! 622 }
661 mp->m_sb.sb_imax_pct += tp->t_imaxpct_ !! 623 if (tp->t_agcount_delta != 0) {
662 mp->m_sb.sb_rextsize += tp->t_rextsize !! 624 error = xfs_sb_mod32(&mp->m_sb.sb_agcount, tp->t_agcount_delta);
663 if (tp->t_rextsize_delta) { !! 625 if (error)
664 mp->m_rtxblklog = log2_if_powe !! 626 goto out_undo_dblocks;
665 mp->m_rtxblkmask = mask64_if_p !! 627 }
>> 628 if (tp->t_imaxpct_delta != 0) {
>> 629 error = xfs_sb_mod8(&mp->m_sb.sb_imax_pct, tp->t_imaxpct_delta);
>> 630 if (error)
>> 631 goto out_undo_agcount;
>> 632 }
>> 633 if (tp->t_rextsize_delta != 0) {
>> 634 error = xfs_sb_mod32(&mp->m_sb.sb_rextsize,
>> 635 tp->t_rextsize_delta);
>> 636 if (error)
>> 637 goto out_undo_imaxpct;
>> 638 }
>> 639 if (tp->t_rbmblocks_delta != 0) {
>> 640 error = xfs_sb_mod32(&mp->m_sb.sb_rbmblocks,
>> 641 tp->t_rbmblocks_delta);
>> 642 if (error)
>> 643 goto out_undo_rextsize;
>> 644 }
>> 645 if (tp->t_rblocks_delta != 0) {
>> 646 error = xfs_sb_mod64(&mp->m_sb.sb_rblocks, tp->t_rblocks_delta);
>> 647 if (error)
>> 648 goto out_undo_rbmblocks;
>> 649 }
>> 650 if (tp->t_rextents_delta != 0) {
>> 651 error = xfs_sb_mod64(&mp->m_sb.sb_rextents,
>> 652 tp->t_rextents_delta);
>> 653 if (error)
>> 654 goto out_undo_rblocks;
>> 655 }
>> 656 if (tp->t_rextslog_delta != 0) {
>> 657 error = xfs_sb_mod8(&mp->m_sb.sb_rextslog,
>> 658 tp->t_rextslog_delta);
>> 659 if (error)
>> 660 goto out_undo_rextents;
666 } 661 }
667 mp->m_sb.sb_rbmblocks += tp->t_rbmbloc <<
668 mp->m_sb.sb_rblocks += tp->t_rblocks_d <<
669 mp->m_sb.sb_rextents += tp->t_rextents <<
670 mp->m_sb.sb_rextslog += tp->t_rextslog <<
671 spin_unlock(&mp->m_sb_lock); 662 spin_unlock(&mp->m_sb_lock);
>> 663 return;
672 664
673 /* !! 665 out_undo_rextents:
674 * Debug checks outside of the spinloc !! 666 if (tp->t_rextents_delta)
675 * machine if they fail. !! 667 xfs_sb_mod64(&mp->m_sb.sb_rextents, -tp->t_rextents_delta);
676 */ !! 668 out_undo_rblocks:
677 ASSERT(mp->m_sb.sb_imax_pct >= 0); !! 669 if (tp->t_rblocks_delta)
678 ASSERT(mp->m_sb.sb_rextslog >= 0); !! 670 xfs_sb_mod64(&mp->m_sb.sb_rblocks, -tp->t_rblocks_delta);
>> 671 out_undo_rbmblocks:
>> 672 if (tp->t_rbmblocks_delta)
>> 673 xfs_sb_mod32(&mp->m_sb.sb_rbmblocks, -tp->t_rbmblocks_delta);
>> 674 out_undo_rextsize:
>> 675 if (tp->t_rextsize_delta)
>> 676 xfs_sb_mod32(&mp->m_sb.sb_rextsize, -tp->t_rextsize_delta);
>> 677 out_undo_imaxpct:
>> 678 if (tp->t_rextsize_delta)
>> 679 xfs_sb_mod8(&mp->m_sb.sb_imax_pct, -tp->t_imaxpct_delta);
>> 680 out_undo_agcount:
>> 681 if (tp->t_agcount_delta)
>> 682 xfs_sb_mod32(&mp->m_sb.sb_agcount, -tp->t_agcount_delta);
>> 683 out_undo_dblocks:
>> 684 if (tp->t_dblocks_delta)
>> 685 xfs_sb_mod64(&mp->m_sb.sb_dblocks, -tp->t_dblocks_delta);
>> 686 out_undo_frextents:
>> 687 if (rtxdelta)
>> 688 xfs_sb_mod64(&mp->m_sb.sb_frextents, -rtxdelta);
>> 689 out_undo_ifree:
>> 690 spin_unlock(&mp->m_sb_lock);
>> 691 if (ifreedelta)
>> 692 xfs_mod_ifree(mp, -ifreedelta);
>> 693 out_undo_icount:
>> 694 if (idelta)
>> 695 xfs_mod_icount(mp, -idelta);
>> 696 out_undo_fdblocks:
>> 697 if (blkdelta)
>> 698 xfs_mod_fdblocks(mp, -blkdelta, rsvd);
>> 699 out:
>> 700 ASSERT(error == 0);
>> 701 return;
679 } 702 }
680 703
681 /* Add the given log item to the transaction's !! 704 /*
>> 705 * Add the given log item to the transaction's list of log items.
>> 706 *
>> 707 * The log item will now point to its new descriptor with its li_desc field.
>> 708 */
682 void 709 void
683 xfs_trans_add_item( 710 xfs_trans_add_item(
684 struct xfs_trans *tp, 711 struct xfs_trans *tp,
685 struct xfs_log_item *lip) 712 struct xfs_log_item *lip)
686 { 713 {
687 ASSERT(lip->li_log == tp->t_mountp->m_ !! 714 struct xfs_log_item_desc *lidp;
>> 715
>> 716 ASSERT(lip->li_mountp == tp->t_mountp);
688 ASSERT(lip->li_ailp == tp->t_mountp->m 717 ASSERT(lip->li_ailp == tp->t_mountp->m_ail);
689 ASSERT(list_empty(&lip->li_trans)); <<
690 ASSERT(!test_bit(XFS_LI_DIRTY, &lip->l <<
691 718
692 list_add_tail(&lip->li_trans, &tp->t_i !! 719 lidp = kmem_zone_zalloc(xfs_log_item_desc_zone, KM_SLEEP | KM_NOFS);
693 trace_xfs_trans_add_item(tp, _RET_IP_) !! 720
>> 721 lidp->lid_item = lip;
>> 722 lidp->lid_flags = 0;
>> 723 list_add_tail(&lidp->lid_trans, &tp->t_items);
>> 724
>> 725 lip->li_desc = lidp;
>> 726 }
>> 727
>> 728 STATIC void
>> 729 xfs_trans_free_item_desc(
>> 730 struct xfs_log_item_desc *lidp)
>> 731 {
>> 732 list_del_init(&lidp->lid_trans);
>> 733 kmem_zone_free(xfs_log_item_desc_zone, lidp);
694 } 734 }
695 735
696 /* 736 /*
697 * Unlink the log item from the transaction. t !! 737 * Unlink and free the given descriptor.
698 * considered dirty in this transaction, as th <<
699 * finished, either by abort or commit complet <<
700 */ 738 */
701 void 739 void
702 xfs_trans_del_item( 740 xfs_trans_del_item(
703 struct xfs_log_item *lip) 741 struct xfs_log_item *lip)
704 { 742 {
705 clear_bit(XFS_LI_DIRTY, &lip->li_flags !! 743 xfs_trans_free_item_desc(lip->li_desc);
706 list_del_init(&lip->li_trans); !! 744 lip->li_desc = NULL;
707 } 745 }
708 746
709 /* Detach and unlock all of the items in a tra !! 747 /*
710 static void !! 748 * Unlock all of the items of a transaction and free all the descriptors
>> 749 * of that transaction.
>> 750 */
>> 751 void
711 xfs_trans_free_items( 752 xfs_trans_free_items(
712 struct xfs_trans *tp, 753 struct xfs_trans *tp,
>> 754 xfs_lsn_t commit_lsn,
713 bool abort) 755 bool abort)
714 { 756 {
715 struct xfs_log_item *lip, *next; !! 757 struct xfs_log_item_desc *lidp, *next;
>> 758
>> 759 list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) {
>> 760 struct xfs_log_item *lip = lidp->lid_item;
716 761
717 trace_xfs_trans_free_items(tp, _RET_IP !! 762 lip->li_desc = NULL;
718 763
719 list_for_each_entry_safe(lip, next, &t !! 764 if (commit_lsn != NULLCOMMITLSN)
720 xfs_trans_del_item(lip); !! 765 lip->li_ops->iop_committing(lip, commit_lsn);
721 if (abort) 766 if (abort)
722 set_bit(XFS_LI_ABORTED !! 767 lip->li_flags |= XFS_LI_ABORTED;
723 if (lip->li_ops->iop_release) !! 768 lip->li_ops->iop_unlock(lip);
724 lip->li_ops->iop_relea !! 769
>> 770 xfs_trans_free_item_desc(lidp);
725 } 771 }
726 } 772 }
727 773
728 /* !! 774 static inline void
729 * Sort transaction items prior to running pre !! 775 xfs_log_item_batch_insert(
730 * attempt to order the items such that they w !! 776 struct xfs_ail *ailp,
731 * order. Items that have no sort function are !! 777 struct xfs_ail_cursor *cur,
732 * and so are locked last. !! 778 struct xfs_log_item **log_items,
733 * !! 779 int nr_items,
734 * This may need refinement as different types !! 780 xfs_lsn_t commit_lsn)
735 * !! 781 {
736 * Function is more complex than it needs to b !! 782 int i;
737 * values and the function only returns 32 bit <<
738 */ <<
739 static int <<
740 xfs_trans_precommit_sort( <<
741 void *unused_arg, <<
742 const struct list_head *a, <<
743 const struct list_head *b) <<
744 { <<
745 struct xfs_log_item *lia = contain <<
746 struct <<
747 struct xfs_log_item *lib = contain <<
748 struct <<
749 int64_t diff; <<
750 783
751 /* !! 784 spin_lock(&ailp->xa_lock);
752 * If both items are non-sortable, lea !! 785 /* xfs_trans_ail_update_bulk drops ailp->xa_lock */
753 * sortable, move the non-sortable ite !! 786 xfs_trans_ail_update_bulk(ailp, cur, log_items, nr_items, commit_lsn);
754 */ !! 787
755 if (!lia->li_ops->iop_sort && !lib->li !! 788 for (i = 0; i < nr_items; i++) {
756 return 0; !! 789 struct xfs_log_item *lip = log_items[i];
757 if (!lia->li_ops->iop_sort) !! 790
758 return 1; !! 791 lip->li_ops->iop_unpin(lip, 0);
759 if (!lib->li_ops->iop_sort) !! 792 }
760 return -1; <<
761 <<
762 diff = lia->li_ops->iop_sort(lia) - li <<
763 if (diff < 0) <<
764 return -1; <<
765 if (diff > 0) <<
766 return 1; <<
767 return 0; <<
768 } 793 }
769 794
770 /* 795 /*
771 * Run transaction precommit functions. !! 796 * Bulk operation version of xfs_trans_committed that takes a log vector of
>> 797 * items to insert into the AIL. This uses bulk AIL insertion techniques to
>> 798 * minimise lock traffic.
772 * 799 *
773 * If there is an error in any of the callouts !! 800 * If we are called with the aborted flag set, it is because a log write during
774 * trigger a shutdown to abort the transaction !! 801 * a CIL checkpoint commit has failed. In this case, all the items in the
775 * from errors at this point as the transactio !! 802 * checkpoint have already gone through iop_commited and iop_unlock, which
>> 803 * means that checkpoint commit abort handling is treated exactly the same
>> 804 * as an iclog write error even though we haven't started any IO yet. Hence in
>> 805 * this case all we need to do is iop_committed processing, followed by an
>> 806 * iop_unpin(aborted) call.
>> 807 *
>> 808 * The AIL cursor is used to optimise the insert process. If commit_lsn is not
>> 809 * at the end of the AIL, the insert cursor avoids the need to walk
>> 810 * the AIL to find the insertion point on every xfs_log_item_batch_insert()
>> 811 * call. This saves a lot of needless list walking and is a net win, even
>> 812 * though it slightly increases that amount of AIL lock traffic to set it up
>> 813 * and tear it down.
776 */ 814 */
777 static int !! 815 void
778 xfs_trans_run_precommits( !! 816 xfs_trans_committed_bulk(
779 struct xfs_trans *tp) !! 817 struct xfs_ail *ailp,
780 { !! 818 struct xfs_log_vec *log_vector,
781 struct xfs_mount *mp = tp->t_mo !! 819 xfs_lsn_t commit_lsn,
782 struct xfs_log_item *lip, *n; !! 820 int aborted)
783 int error = 0; !! 821 {
>> 822 #define LOG_ITEM_BATCH_SIZE 32
>> 823 struct xfs_log_item *log_items[LOG_ITEM_BATCH_SIZE];
>> 824 struct xfs_log_vec *lv;
>> 825 struct xfs_ail_cursor cur;
>> 826 int i = 0;
>> 827
>> 828 spin_lock(&ailp->xa_lock);
>> 829 xfs_trans_ail_cursor_last(ailp, &cur, commit_lsn);
>> 830 spin_unlock(&ailp->xa_lock);
>> 831
>> 832 /* unpin all the log items */
>> 833 for (lv = log_vector; lv; lv = lv->lv_next ) {
>> 834 struct xfs_log_item *lip = lv->lv_item;
>> 835 xfs_lsn_t item_lsn;
>> 836
>> 837 if (aborted)
>> 838 lip->li_flags |= XFS_LI_ABORTED;
>> 839 item_lsn = lip->li_ops->iop_committed(lip, commit_lsn);
784 840
785 /* !! 841 /* item_lsn of -1 means the item needs no further processing */
786 * Sort the item list to avoid ABBA de !! 842 if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0)
787 * running precommit operations that l !! 843 continue;
788 * inode cluster buffers. <<
789 */ <<
790 list_sort(NULL, &tp->t_items, xfs_tran <<
791 844
792 /* !! 845 /*
793 * Precommit operations can remove the !! 846 * if we are aborting the operation, no point in inserting the
794 * if the log item exists purely to de !! 847 * object into the AIL as we are in a shutdown situation.
795 * can be ordered against other operat !! 848 */
796 * list_for_each_entry_safe() here. !! 849 if (aborted) {
797 */ !! 850 ASSERT(XFS_FORCED_SHUTDOWN(ailp->xa_mount));
798 list_for_each_entry_safe(lip, n, &tp-> !! 851 lip->li_ops->iop_unpin(lip, 1);
799 if (!test_bit(XFS_LI_DIRTY, &l !! 852 continue;
>> 853 }
>> 854
>> 855 if (item_lsn != commit_lsn) {
>> 856
>> 857 /*
>> 858 * Not a bulk update option due to unusual item_lsn.
>> 859 * Push into AIL immediately, rechecking the lsn once
>> 860 * we have the ail lock. Then unpin the item. This does
>> 861 * not affect the AIL cursor the bulk insert path is
>> 862 * using.
>> 863 */
>> 864 spin_lock(&ailp->xa_lock);
>> 865 if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0)
>> 866 xfs_trans_ail_update(ailp, lip, item_lsn);
>> 867 else
>> 868 spin_unlock(&ailp->xa_lock);
>> 869 lip->li_ops->iop_unpin(lip, 0);
800 continue; 870 continue;
801 if (lip->li_ops->iop_precommit !! 871 }
802 error = lip->li_ops->i !! 872
803 if (error) !! 873 /* Item is a candidate for bulk AIL insert. */
804 break; !! 874 log_items[i++] = lv->lv_item;
>> 875 if (i >= LOG_ITEM_BATCH_SIZE) {
>> 876 xfs_log_item_batch_insert(ailp, &cur, log_items,
>> 877 LOG_ITEM_BATCH_SIZE, commit_lsn);
>> 878 i = 0;
805 } 879 }
806 } 880 }
807 if (error) !! 881
808 xfs_force_shutdown(mp, SHUTDOW !! 882 /* make sure we insert the remainder! */
809 return error; !! 883 if (i)
>> 884 xfs_log_item_batch_insert(ailp, &cur, log_items, i, commit_lsn);
>> 885
>> 886 spin_lock(&ailp->xa_lock);
>> 887 xfs_trans_ail_cursor_done(&cur);
>> 888 spin_unlock(&ailp->xa_lock);
810 } 889 }
811 890
812 /* 891 /*
813 * Commit the given transaction to the log. 892 * Commit the given transaction to the log.
814 * 893 *
815 * XFS disk error handling mechanism is not ba 894 * XFS disk error handling mechanism is not based on a typical
816 * transaction abort mechanism. Logically afte 895 * transaction abort mechanism. Logically after the filesystem
817 * gets marked 'SHUTDOWN', we can't let any ne 896 * gets marked 'SHUTDOWN', we can't let any new transactions
818 * be durable - ie. committed to disk - becaus 897 * be durable - ie. committed to disk - because some metadata might
819 * be inconsistent. In such cases, this return 898 * be inconsistent. In such cases, this returns an error, and the
820 * caller may assume that all locked objects j 899 * caller may assume that all locked objects joined to the transaction
821 * have already been unlocked as if the commit 900 * have already been unlocked as if the commit had succeeded.
822 * Do not reference the transaction structure 901 * Do not reference the transaction structure after this call.
823 */ 902 */
824 static int 903 static int
825 __xfs_trans_commit( 904 __xfs_trans_commit(
826 struct xfs_trans *tp, 905 struct xfs_trans *tp,
827 bool regrant) 906 bool regrant)
828 { 907 {
829 struct xfs_mount *mp = tp->t_mo 908 struct xfs_mount *mp = tp->t_mountp;
830 struct xlog *log = mp->m_l !! 909 xfs_lsn_t commit_lsn = -1;
831 xfs_csn_t commit_seq = 0 <<
832 int error = 0; 910 int error = 0;
833 int sync = tp->t_f 911 int sync = tp->t_flags & XFS_TRANS_SYNC;
834 912
835 trace_xfs_trans_commit(tp, _RET_IP_); <<
836 <<
837 error = xfs_trans_run_precommits(tp); <<
838 if (error) { <<
839 if (tp->t_flags & XFS_TRANS_PE <<
840 xfs_defer_cancel(tp); <<
841 goto out_unreserve; <<
842 } <<
843 <<
844 /* <<
845 * Finish deferred items on final comm <<
846 * should ever have deferred ops. <<
847 */ <<
848 WARN_ON_ONCE(!list_empty(&tp->t_dfops) <<
849 !(tp->t_flags & XFS_TRANS <<
850 if (!regrant && (tp->t_flags & XFS_TRA <<
851 error = xfs_defer_finish_norol <<
852 if (error) <<
853 goto out_unreserve; <<
854 <<
855 /* Run precommits from final t <<
856 error = xfs_trans_run_precommi <<
857 if (error) <<
858 goto out_unreserve; <<
859 } <<
860 <<
861 /* 913 /*
862 * If there is nothing to be logged by 914 * If there is nothing to be logged by the transaction,
863 * then unlock all of the items associ 915 * then unlock all of the items associated with the
864 * transaction and free the transactio 916 * transaction and free the transaction structure.
865 * Also make sure to return any reserv 917 * Also make sure to return any reserved blocks to
866 * the free pool. 918 * the free pool.
867 */ 919 */
868 if (!(tp->t_flags & XFS_TRANS_DIRTY)) 920 if (!(tp->t_flags & XFS_TRANS_DIRTY))
869 goto out_unreserve; 921 goto out_unreserve;
870 922
871 /* !! 923 if (XFS_FORCED_SHUTDOWN(mp)) {
872 * We must check against log shutdown <<
873 * items and leave them dirty, inconsi <<
874 * the log is active. This leaves them <<
875 * disk, and that will lead to on-disk <<
876 */ <<
877 if (xlog_is_shutdown(log)) { <<
878 error = -EIO; 924 error = -EIO;
879 goto out_unreserve; 925 goto out_unreserve;
880 } 926 }
881 927
882 ASSERT(tp->t_ticket != NULL); 928 ASSERT(tp->t_ticket != NULL);
883 929
884 /* 930 /*
885 * If we need to update the superblock 931 * If we need to update the superblock, then do it now.
886 */ 932 */
887 if (tp->t_flags & XFS_TRANS_SB_DIRTY) 933 if (tp->t_flags & XFS_TRANS_SB_DIRTY)
888 xfs_trans_apply_sb_deltas(tp); 934 xfs_trans_apply_sb_deltas(tp);
889 xfs_trans_apply_dquot_deltas(tp); 935 xfs_trans_apply_dquot_deltas(tp);
890 936
891 xlog_cil_commit(log, tp, &commit_seq, !! 937 xfs_log_commit_cil(mp, tp, &commit_lsn, regrant);
892 938
>> 939 current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
893 xfs_trans_free(tp); 940 xfs_trans_free(tp);
894 941
895 /* 942 /*
896 * If the transaction needs to be sync 943 * If the transaction needs to be synchronous, then force the
897 * log out now and wait for it. 944 * log out now and wait for it.
898 */ 945 */
899 if (sync) { 946 if (sync) {
900 error = xfs_log_force_seq(mp, !! 947 error = _xfs_log_force_lsn(mp, commit_lsn, XFS_LOG_SYNC, NULL);
901 XFS_STATS_INC(mp, xs_trans_syn 948 XFS_STATS_INC(mp, xs_trans_sync);
902 } else { 949 } else {
903 XFS_STATS_INC(mp, xs_trans_asy 950 XFS_STATS_INC(mp, xs_trans_async);
904 } 951 }
905 952
906 return error; 953 return error;
907 954
908 out_unreserve: 955 out_unreserve:
909 xfs_trans_unreserve_and_mod_sb(tp); 956 xfs_trans_unreserve_and_mod_sb(tp);
910 957
911 /* 958 /*
912 * It is indeed possible for the trans 959 * It is indeed possible for the transaction to be not dirty but
913 * the dqinfo portion to be. All that 960 * the dqinfo portion to be. All that means is that we have some
914 * (non-persistent) quota reservations 961 * (non-persistent) quota reservations that need to be unreserved.
915 */ 962 */
916 xfs_trans_unreserve_and_mod_dquots(tp) 963 xfs_trans_unreserve_and_mod_dquots(tp);
917 if (tp->t_ticket) { 964 if (tp->t_ticket) {
918 if (regrant && !xlog_is_shutdo !! 965 commit_lsn = xfs_log_done(mp, tp->t_ticket, NULL, regrant);
919 xfs_log_ticket_regrant !! 966 if (commit_lsn == -1 && !error)
920 else !! 967 error = -EIO;
921 xfs_log_ticket_ungrant <<
922 tp->t_ticket = NULL; <<
923 } 968 }
924 xfs_trans_free_items(tp, !!error); !! 969 current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
>> 970 xfs_trans_free_items(tp, NULLCOMMITLSN, !!error);
925 xfs_trans_free(tp); 971 xfs_trans_free(tp);
926 972
927 XFS_STATS_INC(mp, xs_trans_empty); 973 XFS_STATS_INC(mp, xs_trans_empty);
928 return error; 974 return error;
929 } 975 }
930 976
931 int 977 int
932 xfs_trans_commit( 978 xfs_trans_commit(
933 struct xfs_trans *tp) 979 struct xfs_trans *tp)
934 { 980 {
935 return __xfs_trans_commit(tp, false); 981 return __xfs_trans_commit(tp, false);
936 } 982 }
937 983
938 /* 984 /*
939 * Unlock all of the transaction's items and f !! 985 * Unlock all of the transaction's items and free the transaction.
940 * transaction is dirty, we must shut down the !! 986 * The transaction must not have modified any of its items, because
941 * way to restore them to their previous state !! 987 * there is no way to restore them to their previous state.
942 * <<
943 * If the transaction has made a log reservati <<
944 * well. <<
945 * 988 *
946 * This is a high level function (equivalent t !! 989 * If the transaction has made a log reservation, make sure to release
947 * be called after the transaction has effecti !! 990 * it as well.
948 * being shut down. However, if the mount has <<
949 * transaction is dirty we will shut the mount <<
950 * guarantees that the log is shut down, too. <<
951 * careful with shutdown state and dirty items <<
952 * xfs_trans_commit(). <<
953 */ 991 */
954 void 992 void
955 xfs_trans_cancel( 993 xfs_trans_cancel(
956 struct xfs_trans *tp) 994 struct xfs_trans *tp)
957 { 995 {
958 struct xfs_mount *mp = tp->t_mo 996 struct xfs_mount *mp = tp->t_mountp;
959 struct xlog *log = mp->m_l <<
960 bool dirty = (tp->t 997 bool dirty = (tp->t_flags & XFS_TRANS_DIRTY);
961 998
962 trace_xfs_trans_cancel(tp, _RET_IP_); <<
963 <<
964 /* <<
965 * It's never valid to cancel a transa <<
966 * because the transaction is effectiv <<
967 * loudly before freeing the in-memory <<
968 * filesystem. <<
969 */ <<
970 if (!list_empty(&tp->t_dfops)) { <<
971 ASSERT(tp->t_flags & XFS_TRANS <<
972 dirty = true; <<
973 xfs_defer_cancel(tp); <<
974 } <<
975 <<
976 /* 999 /*
977 * See if the caller is relying on us !! 1000 * See if the caller is relying on us to shut down the
978 * only want an error report if there !! 1001 * filesystem. This happens in paths where we detect
979 * progress, so we only need to check !! 1002 * corruption and decide to give up.
980 * here. <<
981 */ 1003 */
982 if (dirty && !xfs_is_shutdown(mp)) { !! 1004 if (dirty && !XFS_FORCED_SHUTDOWN(mp)) {
983 XFS_ERROR_REPORT("xfs_trans_ca 1005 XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW, mp);
984 xfs_force_shutdown(mp, SHUTDOW 1006 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
985 } 1007 }
986 #ifdef DEBUG 1008 #ifdef DEBUG
987 /* Log items need to be consistent unt !! 1009 if (!dirty && !XFS_FORCED_SHUTDOWN(mp)) {
988 if (!dirty && !xlog_is_shutdown(log)) !! 1010 struct xfs_log_item_desc *lidp;
989 struct xfs_log_item *lip; <<
990 1011
991 list_for_each_entry(lip, &tp-> !! 1012 list_for_each_entry(lidp, &tp->t_items, lid_trans)
992 ASSERT(!xlog_item_is_i !! 1013 ASSERT(!(lidp->lid_item->li_type == XFS_LI_EFD));
993 } 1014 }
994 #endif 1015 #endif
995 xfs_trans_unreserve_and_mod_sb(tp); 1016 xfs_trans_unreserve_and_mod_sb(tp);
996 xfs_trans_unreserve_and_mod_dquots(tp) 1017 xfs_trans_unreserve_and_mod_dquots(tp);
997 1018
998 if (tp->t_ticket) { !! 1019 if (tp->t_ticket)
999 xfs_log_ticket_ungrant(log, tp !! 1020 xfs_log_done(mp, tp->t_ticket, NULL, false);
1000 tp->t_ticket = NULL; <<
1001 } <<
1002 1021
1003 xfs_trans_free_items(tp, dirty); !! 1022 /* mark this thread as no longer being in a transaction */
>> 1023 current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
>> 1024
>> 1025 xfs_trans_free_items(tp, NULLCOMMITLSN, dirty);
1004 xfs_trans_free(tp); 1026 xfs_trans_free(tp);
1005 } 1027 }
1006 1028
1007 /* 1029 /*
1008 * Roll from one trans in the sequence of PER 1030 * Roll from one trans in the sequence of PERMANENT transactions to
1009 * the next: permanent transactions are only 1031 * the next: permanent transactions are only flushed out when
1010 * committed with xfs_trans_commit(), but we 1032 * committed with xfs_trans_commit(), but we still want as soon
1011 * as possible to let chunks of it go to the 1033 * as possible to let chunks of it go to the log. So we commit the
1012 * chunk we've been working on and get a new 1034 * chunk we've been working on and get a new transaction to continue.
1013 */ 1035 */
1014 int 1036 int
1015 xfs_trans_roll( !! 1037 __xfs_trans_roll(
1016 struct xfs_trans **tpp) !! 1038 struct xfs_trans **tpp,
>> 1039 struct xfs_inode *dp,
>> 1040 int *committed)
1017 { 1041 {
1018 struct xfs_trans *trans = *tpp !! 1042 struct xfs_trans *trans;
1019 struct xfs_trans_res tres; 1043 struct xfs_trans_res tres;
1020 int error; 1044 int error;
1021 1045
1022 trace_xfs_trans_roll(trans, _RET_IP_) !! 1046 *committed = 0;
>> 1047
>> 1048 /*
>> 1049 * Ensure that the inode is always logged.
>> 1050 */
>> 1051 trans = *tpp;
>> 1052 if (dp)
>> 1053 xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE);
1023 1054
1024 /* 1055 /*
1025 * Copy the critical parameters from 1056 * Copy the critical parameters from one trans to the next.
1026 */ 1057 */
1027 tres.tr_logres = trans->t_log_res; 1058 tres.tr_logres = trans->t_log_res;
1028 tres.tr_logcount = trans->t_log_count 1059 tres.tr_logcount = trans->t_log_count;
1029 <<
1030 *tpp = xfs_trans_dup(trans); 1060 *tpp = xfs_trans_dup(trans);
1031 1061
1032 /* 1062 /*
1033 * Commit the current transaction. 1063 * Commit the current transaction.
1034 * If this commit failed, then it'd j 1064 * If this commit failed, then it'd just unlock those items that
1035 * are not marked ihold. That also me 1065 * are not marked ihold. That also means that a filesystem shutdown
1036 * is in progress. The caller takes t 1066 * is in progress. The caller takes the responsibility to cancel
1037 * the duplicate transaction that get 1067 * the duplicate transaction that gets returned.
1038 */ 1068 */
1039 error = __xfs_trans_commit(trans, tru 1069 error = __xfs_trans_commit(trans, true);
1040 if (error) 1070 if (error)
1041 return error; 1071 return error;
1042 1072
>> 1073 *committed = 1;
>> 1074 trans = *tpp;
>> 1075
1043 /* 1076 /*
1044 * Reserve space in the log for the n !! 1077 * Reserve space in the log for th next transaction.
1045 * This also pushes items in the "AIL 1078 * This also pushes items in the "AIL", the list of logged items,
1046 * out to disk if they are taking up 1079 * out to disk if they are taking up space at the tail of the log
1047 * that we want to use. This require 1080 * that we want to use. This requires that either nothing be locked
1048 * across this call, or that anything 1081 * across this call, or that anything that is locked be logged in
1049 * the prior and the next transaction 1082 * the prior and the next transactions.
1050 */ 1083 */
1051 tres.tr_logflags = XFS_TRANS_PERM_LOG 1084 tres.tr_logflags = XFS_TRANS_PERM_LOG_RES;
1052 return xfs_trans_reserve(*tpp, &tres, !! 1085 error = xfs_trans_reserve(trans, &tres, 0, 0);
1053 } <<
1054 <<
1055 /* <<
1056 * Allocate an transaction, lock and join the <<
1057 * <<
1058 * The caller must ensure that the on-disk dq <<
1059 * already been allocated and initialized. T <<
1060 * releasing ILOCK_EXCL if a new transaction <<
1061 */ <<
1062 int <<
1063 xfs_trans_alloc_inode( <<
1064 struct xfs_inode *ip, <<
1065 struct xfs_trans_res *resv, <<
1066 unsigned int dblocks, <<
1067 unsigned int rblocks, <<
1068 bool force, <<
1069 struct xfs_trans **tpp) <<
1070 { <<
1071 struct xfs_trans *tp; <<
1072 struct xfs_mount *mp = ip->i_m <<
1073 bool retried = fal <<
1074 int error; <<
1075 <<
1076 retry: <<
1077 error = xfs_trans_alloc(mp, resv, dbl <<
1078 xfs_extlen_to_rtxlen( <<
1079 force ? XFS_TRANS_RES <<
1080 if (error) <<
1081 return error; <<
1082 <<
1083 xfs_ilock(ip, XFS_ILOCK_EXCL); <<
1084 xfs_trans_ijoin(tp, ip, 0); <<
1085 <<
1086 error = xfs_qm_dqattach_locked(ip, fa <<
1087 if (error) { <<
1088 /* Caller should have allocat <<
1089 ASSERT(error != -ENOENT); <<
1090 goto out_cancel; <<
1091 } <<
1092 <<
1093 error = xfs_trans_reserve_quota_nblks <<
1094 if ((error == -EDQUOT || error == -EN <<
1095 xfs_trans_cancel(tp); <<
1096 xfs_iunlock(ip, XFS_ILOCK_EXC <<
1097 xfs_blockgc_free_quota(ip, 0) <<
1098 retried = true; <<
1099 goto retry; <<
1100 } <<
1101 if (error) <<
1102 goto out_cancel; <<
1103 <<
1104 *tpp = tp; <<
1105 return 0; <<
1106 <<
1107 out_cancel: <<
1108 xfs_trans_cancel(tp); <<
1109 xfs_iunlock(ip, XFS_ILOCK_EXCL); <<
1110 return error; <<
1111 } <<
1112 <<
1113 /* <<
1114 * Try to reserve more blocks for a transacti <<
1115 * <<
1116 * This is for callers that need to attach re <<
1117 * those resources to determine the space res <<
1118 * modify the attached resources. In other w <<
1119 * fail due to ENOSPC, so the caller must be <<
1120 * without shutting down the fs. <<
1121 */ <<
1122 int <<
1123 xfs_trans_reserve_more( <<
1124 struct xfs_trans *tp, <<
1125 unsigned int blocks, <<
1126 unsigned int rtextents) <<
1127 { <<
1128 struct xfs_trans_res resv = { }; <<
1129 <<
1130 return xfs_trans_reserve(tp, &resv, b <<
1131 } <<
1132 <<
1133 /* <<
1134 * Try to reserve more blocks and file quota <<
1135 * conditions of usage as xfs_trans_reserve_m <<
1136 */ <<
1137 int <<
1138 xfs_trans_reserve_more_inode( <<
1139 struct xfs_trans *tp, <<
1140 struct xfs_inode *ip, <<
1141 unsigned int dblocks, <<
1142 unsigned int rblocks, <<
1143 bool force_quota) <<
1144 { <<
1145 struct xfs_trans_res resv = { }; <<
1146 struct xfs_mount *mp = ip->i_m <<
1147 unsigned int rtx = xfs_ext <<
1148 int error; <<
1149 <<
1150 xfs_assert_ilocked(ip, XFS_ILOCK_EXCL <<
1151 <<
1152 error = xfs_trans_reserve(tp, &resv, <<
1153 if (error) <<
1154 return error; <<
1155 <<
1156 if (!XFS_IS_QUOTA_ON(mp) || xfs_is_qu <<
1157 return 0; <<
1158 <<
1159 if (tp->t_flags & XFS_TRANS_RESERVE) <<
1160 force_quota = true; <<
1161 <<
1162 error = xfs_trans_reserve_quota_nblks <<
1163 force_quota); <<
1164 if (!error) <<
1165 return 0; <<
1166 <<
1167 /* Quota failed, give back the new re <<
1168 xfs_add_fdblocks(mp, dblocks); <<
1169 tp->t_blk_res -= dblocks; <<
1170 xfs_add_frextents(mp, rtx); <<
1171 tp->t_rtx_res -= rtx; <<
1172 return error; <<
1173 } <<
1174 <<
1175 /* <<
1176 * Allocate an transaction in preparation for <<
1177 * against the given dquots. Callers are not <<
1178 */ <<
1179 int <<
1180 xfs_trans_alloc_icreate( <<
1181 struct xfs_mount *mp, <<
1182 struct xfs_trans_res *resv, <<
1183 struct xfs_dquot *udqp, <<
1184 struct xfs_dquot *gdqp, <<
1185 struct xfs_dquot *pdqp, <<
1186 unsigned int dblocks, <<
1187 struct xfs_trans **tpp) <<
1188 { <<
1189 struct xfs_trans *tp; <<
1190 bool retried = fal <<
1191 int error; <<
1192 <<
1193 retry: <<
1194 error = xfs_trans_alloc(mp, resv, dbl <<
1195 if (error) <<
1196 return error; <<
1197 <<
1198 error = xfs_trans_reserve_quota_icrea <<
1199 if ((error == -EDQUOT || error == -EN <<
1200 xfs_trans_cancel(tp); <<
1201 xfs_blockgc_free_dquots(mp, u <<
1202 retried = true; <<
1203 goto retry; <<
1204 } <<
1205 if (error) { <<
1206 xfs_trans_cancel(tp); <<
1207 return error; <<
1208 } <<
1209 <<
1210 *tpp = tp; <<
1211 return 0; <<
1212 } <<
1213 <<
1214 /* <<
1215 * Allocate an transaction, lock and join the <<
1216 * in preparation for inode attribute changes <<
1217 * changes. <<
1218 * <<
1219 * The caller must ensure that the on-disk dq <<
1220 * already been allocated and initialized. T <<
1221 * transaction is committed or cancelled. <<
1222 */ <<
1223 int <<
1224 xfs_trans_alloc_ichange( <<
1225 struct xfs_inode *ip, <<
1226 struct xfs_dquot *new_udqp, <<
1227 struct xfs_dquot *new_gdqp, <<
1228 struct xfs_dquot *new_pdqp, <<
1229 bool force, <<
1230 struct xfs_trans **tpp) <<
1231 { <<
1232 struct xfs_trans *tp; <<
1233 struct xfs_mount *mp = ip->i_m <<
1234 struct xfs_dquot *udqp; <<
1235 struct xfs_dquot *gdqp; <<
1236 struct xfs_dquot *pdqp; <<
1237 bool retried = fal <<
1238 int error; <<
1239 <<
1240 retry: <<
1241 error = xfs_trans_alloc(mp, &M_RES(mp <<
1242 if (error) <<
1243 return error; <<
1244 <<
1245 xfs_ilock(ip, XFS_ILOCK_EXCL); <<
1246 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXC <<
1247 <<
1248 error = xfs_qm_dqattach_locked(ip, fa <<
1249 if (error) { <<
1250 /* Caller should have allocat <<
1251 ASSERT(error != -ENOENT); <<
1252 goto out_cancel; <<
1253 } <<
1254 <<
1255 /* 1086 /*
1256 * For each quota type, skip quota re !! 1087 * Ensure that the inode is in the new transaction and locked.
1257 * now match the ones that came from <<
1258 * pass one in. The inode's dquots c <<
1259 * perform a blockgc scan, so we must <<
1260 */ 1088 */
1261 udqp = (new_udqp != ip->i_udquot) ? n !! 1089 if (error)
1262 gdqp = (new_gdqp != ip->i_gdquot) ? n !! 1090 return error;
1263 pdqp = (new_pdqp != ip->i_pdquot) ? n <<
1264 if (udqp || gdqp || pdqp) { <<
1265 unsigned int qflags = XFS_ <<
1266 <<
1267 if (force) <<
1268 qflags |= XFS_QMOPT_F <<
1269 <<
1270 /* <<
1271 * Reserve enough quota to ha <<
1272 * for a delayed allocation. <<
1273 * delalloc reservation betwe <<
1274 * though that part is only s <<
1275 */ <<
1276 error = xfs_trans_reserve_quo <<
1277 pdqp, ip->i_n <<
1278 1, qflags); <<
1279 if ((error == -EDQUOT || erro <<
1280 xfs_trans_cancel(tp); <<
1281 xfs_blockgc_free_dquo <<
1282 retried = true; <<
1283 goto retry; <<
1284 } <<
1285 if (error) <<
1286 goto out_cancel; <<
1287 } <<
1288 1091
1289 *tpp = tp; !! 1092 if (dp)
>> 1093 xfs_trans_ijoin(trans, dp, 0);
1290 return 0; 1094 return 0;
1291 <<
1292 out_cancel: <<
1293 xfs_trans_cancel(tp); <<
1294 return error; <<
1295 } 1095 }
1296 1096
1297 /* <<
1298 * Allocate an transaction, lock and join the <<
1299 * and reserve quota for a directory update. <<
1300 * @dblocks will be set to zero for a reserva <<
1301 * @nospace_error will be set to a negative e <<
1302 * constraint we hit. <<
1303 * <<
1304 * The caller must ensure that the on-disk dq <<
1305 * already been allocated and initialized. T <<
1306 * transaction is committed or cancelled. <<
1307 * <<
1308 * Caller is responsible for unlocking the in <<
1309 */ <<
1310 int 1097 int
1311 xfs_trans_alloc_dir( !! 1098 xfs_trans_roll(
1312 struct xfs_inode *dp, <<
1313 struct xfs_trans_res *resv, <<
1314 struct xfs_inode *ip, <<
1315 unsigned int *dblocks, <<
1316 struct xfs_trans **tpp, 1099 struct xfs_trans **tpp,
1317 int *nospace_erro !! 1100 struct xfs_inode *dp)
1318 { 1101 {
1319 struct xfs_trans *tp; !! 1102 int committed;
1320 struct xfs_mount *mp = ip->i_m !! 1103 return __xfs_trans_roll(tpp, dp, &committed);
1321 unsigned int resblks; <<
1322 bool retried = fal <<
1323 int error; <<
1324 <<
1325 retry: <<
1326 *nospace_error = 0; <<
1327 resblks = *dblocks; <<
1328 error = xfs_trans_alloc(mp, resv, res <<
1329 if (error == -ENOSPC) { <<
1330 *nospace_error = error; <<
1331 resblks = 0; <<
1332 error = xfs_trans_alloc(mp, r <<
1333 } <<
1334 if (error) <<
1335 return error; <<
1336 <<
1337 xfs_lock_two_inodes(dp, XFS_ILOCK_EXC <<
1338 <<
1339 xfs_trans_ijoin(tp, dp, 0); <<
1340 xfs_trans_ijoin(tp, ip, 0); <<
1341 <<
1342 error = xfs_qm_dqattach_locked(dp, fa <<
1343 if (error) { <<
1344 /* Caller should have allocat <<
1345 ASSERT(error != -ENOENT); <<
1346 goto out_cancel; <<
1347 } <<
1348 <<
1349 error = xfs_qm_dqattach_locked(ip, fa <<
1350 if (error) { <<
1351 /* Caller should have allocat <<
1352 ASSERT(error != -ENOENT); <<
1353 goto out_cancel; <<
1354 } <<
1355 <<
1356 if (resblks == 0) <<
1357 goto done; <<
1358 <<
1359 error = xfs_trans_reserve_quota_nblks <<
1360 if (error == -EDQUOT || error == -ENO <<
1361 if (!retried) { <<
1362 xfs_trans_cancel(tp); <<
1363 xfs_iunlock(dp, XFS_I <<
1364 if (dp != ip) <<
1365 xfs_iunlock(i <<
1366 xfs_blockgc_free_quot <<
1367 retried = true; <<
1368 goto retry; <<
1369 } <<
1370 <<
1371 *nospace_error = error; <<
1372 resblks = 0; <<
1373 error = 0; <<
1374 } <<
1375 if (error) <<
1376 goto out_cancel; <<
1377 <<
1378 done: <<
1379 *tpp = tp; <<
1380 *dblocks = resblks; <<
1381 return 0; <<
1382 <<
1383 out_cancel: <<
1384 xfs_trans_cancel(tp); <<
1385 return error; <<
1386 } 1104 }
1387 1105
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