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