Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of version 2 of the GNU General Public License as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it would be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 11 | * |
| 12 | * Further, this software is distributed without any warranty that it is |
| 13 | * free of the rightful claim of any third person regarding infringement |
| 14 | * or the like. Any license provided herein, whether implied or |
| 15 | * otherwise, applies only to this software file. Patent licenses, if |
| 16 | * any, provided herein do not apply to combinations of this program with |
| 17 | * other software, or any other product whatsoever. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along |
| 20 | * with this program; if not, write the Free Software Foundation, Inc., 59 |
| 21 | * Temple Place - Suite 330, Boston MA 02111-1307, USA. |
| 22 | * |
| 23 | * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, |
| 24 | * Mountain View, CA 94043, or: |
| 25 | * |
| 26 | * http://www.sgi.com |
| 27 | * |
| 28 | * For further information regarding this notice, see: |
| 29 | * |
| 30 | * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ |
| 31 | */ |
| 32 | |
| 33 | #include "xfs.h" |
| 34 | #include "xfs_fs.h" |
| 35 | #include "xfs_inum.h" |
| 36 | #include "xfs_log.h" |
| 37 | #include "xfs_trans.h" |
| 38 | #include "xfs_sb.h" |
| 39 | #include "xfs_ag.h" |
| 40 | #include "xfs_dir.h" |
| 41 | #include "xfs_dir2.h" |
| 42 | #include "xfs_alloc.h" |
| 43 | #include "xfs_dmapi.h" |
| 44 | #include "xfs_quota.h" |
| 45 | #include "xfs_mount.h" |
| 46 | #include "xfs_alloc_btree.h" |
| 47 | #include "xfs_bmap_btree.h" |
| 48 | #include "xfs_ialloc_btree.h" |
| 49 | #include "xfs_btree.h" |
| 50 | #include "xfs_ialloc.h" |
| 51 | #include "xfs_attr_sf.h" |
| 52 | #include "xfs_dir_sf.h" |
| 53 | #include "xfs_dir2_sf.h" |
| 54 | #include "xfs_dinode.h" |
| 55 | #include "xfs_inode.h" |
| 56 | #include "xfs_bmap.h" |
| 57 | #include "xfs_bit.h" |
| 58 | #include "xfs_rtalloc.h" |
| 59 | #include "xfs_error.h" |
| 60 | #include "xfs_itable.h" |
| 61 | #include "xfs_rw.h" |
| 62 | #include "xfs_acl.h" |
| 63 | #include "xfs_cap.h" |
| 64 | #include "xfs_mac.h" |
| 65 | #include "xfs_attr.h" |
| 66 | #include "xfs_buf_item.h" |
| 67 | #include "xfs_trans_priv.h" |
| 68 | |
| 69 | #include "xfs_qm.h" |
| 70 | |
| 71 | |
| 72 | /* |
| 73 | * returns the number of iovecs needed to log the given dquot item. |
| 74 | */ |
| 75 | /* ARGSUSED */ |
| 76 | STATIC uint |
| 77 | xfs_qm_dquot_logitem_size( |
| 78 | xfs_dq_logitem_t *logitem) |
| 79 | { |
| 80 | /* |
| 81 | * we need only two iovecs, one for the format, one for the real thing |
| 82 | */ |
| 83 | return (2); |
| 84 | } |
| 85 | |
| 86 | /* |
| 87 | * fills in the vector of log iovecs for the given dquot log item. |
| 88 | */ |
| 89 | STATIC void |
| 90 | xfs_qm_dquot_logitem_format( |
| 91 | xfs_dq_logitem_t *logitem, |
| 92 | xfs_log_iovec_t *logvec) |
| 93 | { |
| 94 | ASSERT(logitem); |
| 95 | ASSERT(logitem->qli_dquot); |
| 96 | |
| 97 | logvec->i_addr = (xfs_caddr_t)&logitem->qli_format; |
| 98 | logvec->i_len = sizeof(xfs_dq_logformat_t); |
| 99 | logvec++; |
| 100 | logvec->i_addr = (xfs_caddr_t)&logitem->qli_dquot->q_core; |
| 101 | logvec->i_len = sizeof(xfs_disk_dquot_t); |
| 102 | |
| 103 | ASSERT(2 == logitem->qli_item.li_desc->lid_size); |
| 104 | logitem->qli_format.qlf_size = 2; |
| 105 | |
| 106 | } |
| 107 | |
| 108 | /* |
| 109 | * Increment the pin count of the given dquot. |
| 110 | * This value is protected by pinlock spinlock in the xQM structure. |
| 111 | */ |
| 112 | STATIC void |
| 113 | xfs_qm_dquot_logitem_pin( |
| 114 | xfs_dq_logitem_t *logitem) |
| 115 | { |
| 116 | unsigned long s; |
| 117 | xfs_dquot_t *dqp; |
| 118 | |
| 119 | dqp = logitem->qli_dquot; |
| 120 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); |
| 121 | s = XFS_DQ_PINLOCK(dqp); |
| 122 | dqp->q_pincount++; |
| 123 | XFS_DQ_PINUNLOCK(dqp, s); |
| 124 | } |
| 125 | |
| 126 | /* |
| 127 | * Decrement the pin count of the given dquot, and wake up |
| 128 | * anyone in xfs_dqwait_unpin() if the count goes to 0. The |
| 129 | * dquot must have been previously pinned with a call to xfs_dqpin(). |
| 130 | */ |
| 131 | /* ARGSUSED */ |
| 132 | STATIC void |
| 133 | xfs_qm_dquot_logitem_unpin( |
| 134 | xfs_dq_logitem_t *logitem, |
| 135 | int stale) |
| 136 | { |
| 137 | unsigned long s; |
| 138 | xfs_dquot_t *dqp; |
| 139 | |
| 140 | dqp = logitem->qli_dquot; |
| 141 | ASSERT(dqp->q_pincount > 0); |
| 142 | s = XFS_DQ_PINLOCK(dqp); |
| 143 | dqp->q_pincount--; |
| 144 | if (dqp->q_pincount == 0) { |
| 145 | sv_broadcast(&dqp->q_pinwait); |
| 146 | } |
| 147 | XFS_DQ_PINUNLOCK(dqp, s); |
| 148 | } |
| 149 | |
| 150 | /* ARGSUSED */ |
| 151 | STATIC void |
| 152 | xfs_qm_dquot_logitem_unpin_remove( |
| 153 | xfs_dq_logitem_t *logitem, |
| 154 | xfs_trans_t *tp) |
| 155 | { |
| 156 | xfs_qm_dquot_logitem_unpin(logitem, 0); |
| 157 | } |
| 158 | |
| 159 | /* |
| 160 | * Given the logitem, this writes the corresponding dquot entry to disk |
| 161 | * asynchronously. This is called with the dquot entry securely locked; |
| 162 | * we simply get xfs_qm_dqflush() to do the work, and unlock the dquot |
| 163 | * at the end. |
| 164 | */ |
| 165 | STATIC void |
| 166 | xfs_qm_dquot_logitem_push( |
| 167 | xfs_dq_logitem_t *logitem) |
| 168 | { |
| 169 | xfs_dquot_t *dqp; |
| 170 | |
| 171 | dqp = logitem->qli_dquot; |
| 172 | |
| 173 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); |
| 174 | ASSERT(XFS_DQ_IS_FLUSH_LOCKED(dqp)); |
| 175 | |
| 176 | /* |
| 177 | * Since we were able to lock the dquot's flush lock and |
| 178 | * we found it on the AIL, the dquot must be dirty. This |
| 179 | * is because the dquot is removed from the AIL while still |
| 180 | * holding the flush lock in xfs_dqflush_done(). Thus, if |
| 181 | * we found it in the AIL and were able to obtain the flush |
| 182 | * lock without sleeping, then there must not have been |
| 183 | * anyone in the process of flushing the dquot. |
| 184 | */ |
| 185 | xfs_qm_dqflush(dqp, XFS_B_DELWRI); |
| 186 | xfs_dqunlock(dqp); |
| 187 | } |
| 188 | |
| 189 | /*ARGSUSED*/ |
| 190 | STATIC xfs_lsn_t |
| 191 | xfs_qm_dquot_logitem_committed( |
| 192 | xfs_dq_logitem_t *l, |
| 193 | xfs_lsn_t lsn) |
| 194 | { |
| 195 | /* |
| 196 | * We always re-log the entire dquot when it becomes dirty, |
| 197 | * so, the latest copy _is_ the only one that matters. |
| 198 | */ |
| 199 | return (lsn); |
| 200 | } |
| 201 | |
| 202 | |
| 203 | /* |
| 204 | * This is called to wait for the given dquot to be unpinned. |
| 205 | * Most of these pin/unpin routines are plagiarized from inode code. |
| 206 | */ |
| 207 | void |
| 208 | xfs_qm_dqunpin_wait( |
| 209 | xfs_dquot_t *dqp) |
| 210 | { |
| 211 | SPLDECL(s); |
| 212 | |
| 213 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); |
| 214 | if (dqp->q_pincount == 0) { |
| 215 | return; |
| 216 | } |
| 217 | |
| 218 | /* |
| 219 | * Give the log a push so we don't wait here too long. |
| 220 | */ |
| 221 | xfs_log_force(dqp->q_mount, (xfs_lsn_t)0, XFS_LOG_FORCE); |
| 222 | s = XFS_DQ_PINLOCK(dqp); |
| 223 | if (dqp->q_pincount == 0) { |
| 224 | XFS_DQ_PINUNLOCK(dqp, s); |
| 225 | return; |
| 226 | } |
| 227 | sv_wait(&(dqp->q_pinwait), PINOD, |
| 228 | &(XFS_DQ_TO_QINF(dqp)->qi_pinlock), s); |
| 229 | } |
| 230 | |
| 231 | /* |
| 232 | * This is called when IOP_TRYLOCK returns XFS_ITEM_PUSHBUF to indicate that |
| 233 | * the dquot is locked by us, but the flush lock isn't. So, here we are |
| 234 | * going to see if the relevant dquot buffer is incore, waiting on DELWRI. |
| 235 | * If so, we want to push it out to help us take this item off the AIL as soon |
| 236 | * as possible. |
| 237 | * |
| 238 | * We must not be holding the AIL_LOCK at this point. Calling incore() to |
| 239 | * search the buffercache can be a time consuming thing, and AIL_LOCK is a |
| 240 | * spinlock. |
| 241 | */ |
| 242 | STATIC void |
| 243 | xfs_qm_dquot_logitem_pushbuf( |
| 244 | xfs_dq_logitem_t *qip) |
| 245 | { |
| 246 | xfs_dquot_t *dqp; |
| 247 | xfs_mount_t *mp; |
| 248 | xfs_buf_t *bp; |
| 249 | uint dopush; |
| 250 | |
| 251 | dqp = qip->qli_dquot; |
| 252 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); |
| 253 | |
| 254 | /* |
| 255 | * The qli_pushbuf_flag keeps others from |
| 256 | * trying to duplicate our effort. |
| 257 | */ |
| 258 | ASSERT(qip->qli_pushbuf_flag != 0); |
| 259 | ASSERT(qip->qli_push_owner == get_thread_id()); |
| 260 | |
| 261 | /* |
| 262 | * If flushlock isn't locked anymore, chances are that the |
| 263 | * inode flush completed and the inode was taken off the AIL. |
| 264 | * So, just get out. |
| 265 | */ |
| 266 | if ((valusema(&(dqp->q_flock)) > 0) || |
| 267 | ((qip->qli_item.li_flags & XFS_LI_IN_AIL) == 0)) { |
| 268 | qip->qli_pushbuf_flag = 0; |
| 269 | xfs_dqunlock(dqp); |
| 270 | return; |
| 271 | } |
| 272 | mp = dqp->q_mount; |
| 273 | bp = xfs_incore(mp->m_ddev_targp, qip->qli_format.qlf_blkno, |
| 274 | XFS_QI_DQCHUNKLEN(mp), |
| 275 | XFS_INCORE_TRYLOCK); |
| 276 | if (bp != NULL) { |
| 277 | if (XFS_BUF_ISDELAYWRITE(bp)) { |
| 278 | dopush = ((qip->qli_item.li_flags & XFS_LI_IN_AIL) && |
| 279 | (valusema(&(dqp->q_flock)) <= 0)); |
| 280 | qip->qli_pushbuf_flag = 0; |
| 281 | xfs_dqunlock(dqp); |
| 282 | |
| 283 | if (XFS_BUF_ISPINNED(bp)) { |
| 284 | xfs_log_force(mp, (xfs_lsn_t)0, |
| 285 | XFS_LOG_FORCE); |
| 286 | } |
| 287 | if (dopush) { |
| 288 | #ifdef XFSRACEDEBUG |
| 289 | delay_for_intr(); |
| 290 | delay(300); |
| 291 | #endif |
| 292 | xfs_bawrite(mp, bp); |
| 293 | } else { |
| 294 | xfs_buf_relse(bp); |
| 295 | } |
| 296 | } else { |
| 297 | qip->qli_pushbuf_flag = 0; |
| 298 | xfs_dqunlock(dqp); |
| 299 | xfs_buf_relse(bp); |
| 300 | } |
| 301 | return; |
| 302 | } |
| 303 | |
| 304 | qip->qli_pushbuf_flag = 0; |
| 305 | xfs_dqunlock(dqp); |
| 306 | } |
| 307 | |
| 308 | /* |
| 309 | * This is called to attempt to lock the dquot associated with this |
| 310 | * dquot log item. Don't sleep on the dquot lock or the flush lock. |
| 311 | * If the flush lock is already held, indicating that the dquot has |
| 312 | * been or is in the process of being flushed, then see if we can |
| 313 | * find the dquot's buffer in the buffer cache without sleeping. If |
| 314 | * we can and it is marked delayed write, then we want to send it out. |
| 315 | * We delay doing so until the push routine, though, to avoid sleeping |
| 316 | * in any device strategy routines. |
| 317 | */ |
| 318 | STATIC uint |
| 319 | xfs_qm_dquot_logitem_trylock( |
| 320 | xfs_dq_logitem_t *qip) |
| 321 | { |
| 322 | xfs_dquot_t *dqp; |
| 323 | uint retval; |
| 324 | |
| 325 | dqp = qip->qli_dquot; |
| 326 | if (dqp->q_pincount > 0) |
| 327 | return (XFS_ITEM_PINNED); |
| 328 | |
| 329 | if (! xfs_qm_dqlock_nowait(dqp)) |
| 330 | return (XFS_ITEM_LOCKED); |
| 331 | |
| 332 | retval = XFS_ITEM_SUCCESS; |
| 333 | if (! xfs_qm_dqflock_nowait(dqp)) { |
| 334 | /* |
| 335 | * The dquot is already being flushed. It may have been |
| 336 | * flushed delayed write, however, and we don't want to |
| 337 | * get stuck waiting for that to complete. So, we want to check |
| 338 | * to see if we can lock the dquot's buffer without sleeping. |
| 339 | * If we can and it is marked for delayed write, then we |
| 340 | * hold it and send it out from the push routine. We don't |
| 341 | * want to do that now since we might sleep in the device |
| 342 | * strategy routine. We also don't want to grab the buffer lock |
| 343 | * here because we'd like not to call into the buffer cache |
| 344 | * while holding the AIL_LOCK. |
| 345 | * Make sure to only return PUSHBUF if we set pushbuf_flag |
| 346 | * ourselves. If someone else is doing it then we don't |
| 347 | * want to go to the push routine and duplicate their efforts. |
| 348 | */ |
| 349 | if (qip->qli_pushbuf_flag == 0) { |
| 350 | qip->qli_pushbuf_flag = 1; |
| 351 | ASSERT(qip->qli_format.qlf_blkno == dqp->q_blkno); |
| 352 | #ifdef DEBUG |
| 353 | qip->qli_push_owner = get_thread_id(); |
| 354 | #endif |
| 355 | /* |
| 356 | * The dquot is left locked. |
| 357 | */ |
| 358 | retval = XFS_ITEM_PUSHBUF; |
| 359 | } else { |
| 360 | retval = XFS_ITEM_FLUSHING; |
| 361 | xfs_dqunlock_nonotify(dqp); |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | ASSERT(qip->qli_item.li_flags & XFS_LI_IN_AIL); |
| 366 | return (retval); |
| 367 | } |
| 368 | |
| 369 | |
| 370 | /* |
| 371 | * Unlock the dquot associated with the log item. |
| 372 | * Clear the fields of the dquot and dquot log item that |
| 373 | * are specific to the current transaction. If the |
| 374 | * hold flags is set, do not unlock the dquot. |
| 375 | */ |
| 376 | STATIC void |
| 377 | xfs_qm_dquot_logitem_unlock( |
| 378 | xfs_dq_logitem_t *ql) |
| 379 | { |
| 380 | xfs_dquot_t *dqp; |
| 381 | |
| 382 | ASSERT(ql != NULL); |
| 383 | dqp = ql->qli_dquot; |
| 384 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); |
| 385 | |
| 386 | /* |
| 387 | * Clear the transaction pointer in the dquot |
| 388 | */ |
| 389 | dqp->q_transp = NULL; |
| 390 | |
| 391 | /* |
| 392 | * dquots are never 'held' from getting unlocked at the end of |
| 393 | * a transaction. Their locking and unlocking is hidden inside the |
| 394 | * transaction layer, within trans_commit. Hence, no LI_HOLD flag |
| 395 | * for the logitem. |
| 396 | */ |
| 397 | xfs_dqunlock(dqp); |
| 398 | } |
| 399 | |
| 400 | |
| 401 | /* |
| 402 | * The transaction with the dquot locked has aborted. The dquot |
| 403 | * must not be dirty within the transaction. We simply unlock just |
| 404 | * as if the transaction had been cancelled. |
| 405 | */ |
| 406 | STATIC void |
| 407 | xfs_qm_dquot_logitem_abort( |
| 408 | xfs_dq_logitem_t *ql) |
| 409 | { |
| 410 | xfs_qm_dquot_logitem_unlock(ql); |
| 411 | } |
| 412 | |
| 413 | /* |
| 414 | * this needs to stamp an lsn into the dquot, I think. |
| 415 | * rpc's that look at user dquot's would then have to |
| 416 | * push on the dependency recorded in the dquot |
| 417 | */ |
| 418 | /* ARGSUSED */ |
| 419 | STATIC void |
| 420 | xfs_qm_dquot_logitem_committing( |
| 421 | xfs_dq_logitem_t *l, |
| 422 | xfs_lsn_t lsn) |
| 423 | { |
| 424 | return; |
| 425 | } |
| 426 | |
| 427 | |
| 428 | /* |
| 429 | * This is the ops vector for dquots |
| 430 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 431 | STATIC struct xfs_item_ops xfs_dquot_item_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | .iop_size = (uint(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_size, |
| 433 | .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*)) |
| 434 | xfs_qm_dquot_logitem_format, |
| 435 | .iop_pin = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_pin, |
| 436 | .iop_unpin = (void(*)(xfs_log_item_t*, int)) |
| 437 | xfs_qm_dquot_logitem_unpin, |
| 438 | .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*)) |
| 439 | xfs_qm_dquot_logitem_unpin_remove, |
| 440 | .iop_trylock = (uint(*)(xfs_log_item_t*)) |
| 441 | xfs_qm_dquot_logitem_trylock, |
| 442 | .iop_unlock = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_unlock, |
| 443 | .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t)) |
| 444 | xfs_qm_dquot_logitem_committed, |
| 445 | .iop_push = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_push, |
| 446 | .iop_abort = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_abort, |
| 447 | .iop_pushbuf = (void(*)(xfs_log_item_t*)) |
| 448 | xfs_qm_dquot_logitem_pushbuf, |
| 449 | .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) |
| 450 | xfs_qm_dquot_logitem_committing |
| 451 | }; |
| 452 | |
| 453 | /* |
| 454 | * Initialize the dquot log item for a newly allocated dquot. |
| 455 | * The dquot isn't locked at this point, but it isn't on any of the lists |
| 456 | * either, so we don't care. |
| 457 | */ |
| 458 | void |
| 459 | xfs_qm_dquot_logitem_init( |
| 460 | struct xfs_dquot *dqp) |
| 461 | { |
| 462 | xfs_dq_logitem_t *lp; |
| 463 | lp = &dqp->q_logitem; |
| 464 | |
| 465 | lp->qli_item.li_type = XFS_LI_DQUOT; |
| 466 | lp->qli_item.li_ops = &xfs_dquot_item_ops; |
| 467 | lp->qli_item.li_mountp = dqp->q_mount; |
| 468 | lp->qli_dquot = dqp; |
| 469 | lp->qli_format.qlf_type = XFS_LI_DQUOT; |
| 470 | lp->qli_format.qlf_id = INT_GET(dqp->q_core.d_id, ARCH_CONVERT); |
| 471 | lp->qli_format.qlf_blkno = dqp->q_blkno; |
| 472 | lp->qli_format.qlf_len = 1; |
| 473 | /* |
| 474 | * This is just the offset of this dquot within its buffer |
| 475 | * (which is currently 1 FSB and probably won't change). |
| 476 | * Hence 32 bits for this offset should be just fine. |
| 477 | * Alternatively, we can store (bufoffset / sizeof(xfs_dqblk_t)) |
| 478 | * here, and recompute it at recovery time. |
| 479 | */ |
| 480 | lp->qli_format.qlf_boffset = (__uint32_t)dqp->q_bufoffset; |
| 481 | } |
| 482 | |
| 483 | /*------------------ QUOTAOFF LOG ITEMS -------------------*/ |
| 484 | |
| 485 | /* |
| 486 | * This returns the number of iovecs needed to log the given quotaoff item. |
| 487 | * We only need 1 iovec for an quotaoff item. It just logs the |
| 488 | * quotaoff_log_format structure. |
| 489 | */ |
| 490 | /*ARGSUSED*/ |
| 491 | STATIC uint |
| 492 | xfs_qm_qoff_logitem_size(xfs_qoff_logitem_t *qf) |
| 493 | { |
| 494 | return (1); |
| 495 | } |
| 496 | |
| 497 | /* |
| 498 | * This is called to fill in the vector of log iovecs for the |
| 499 | * given quotaoff log item. We use only 1 iovec, and we point that |
| 500 | * at the quotaoff_log_format structure embedded in the quotaoff item. |
| 501 | * It is at this point that we assert that all of the extent |
| 502 | * slots in the quotaoff item have been filled. |
| 503 | */ |
| 504 | STATIC void |
| 505 | xfs_qm_qoff_logitem_format(xfs_qoff_logitem_t *qf, |
| 506 | xfs_log_iovec_t *log_vector) |
| 507 | { |
| 508 | ASSERT(qf->qql_format.qf_type == XFS_LI_QUOTAOFF); |
| 509 | |
| 510 | log_vector->i_addr = (xfs_caddr_t)&(qf->qql_format); |
| 511 | log_vector->i_len = sizeof(xfs_qoff_logitem_t); |
Tim Shimmin | 7e9c639 | 2005-09-02 16:42:05 +1000 | [diff] [blame] | 512 | XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_QUOTAOFF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | qf->qql_format.qf_size = 1; |
| 514 | } |
| 515 | |
| 516 | |
| 517 | /* |
| 518 | * Pinning has no meaning for an quotaoff item, so just return. |
| 519 | */ |
| 520 | /*ARGSUSED*/ |
| 521 | STATIC void |
| 522 | xfs_qm_qoff_logitem_pin(xfs_qoff_logitem_t *qf) |
| 523 | { |
| 524 | return; |
| 525 | } |
| 526 | |
| 527 | |
| 528 | /* |
| 529 | * Since pinning has no meaning for an quotaoff item, unpinning does |
| 530 | * not either. |
| 531 | */ |
| 532 | /*ARGSUSED*/ |
| 533 | STATIC void |
| 534 | xfs_qm_qoff_logitem_unpin(xfs_qoff_logitem_t *qf, int stale) |
| 535 | { |
| 536 | return; |
| 537 | } |
| 538 | |
| 539 | /*ARGSUSED*/ |
| 540 | STATIC void |
| 541 | xfs_qm_qoff_logitem_unpin_remove(xfs_qoff_logitem_t *qf, xfs_trans_t *tp) |
| 542 | { |
| 543 | return; |
| 544 | } |
| 545 | |
| 546 | /* |
| 547 | * Quotaoff items have no locking, so just return success. |
| 548 | */ |
| 549 | /*ARGSUSED*/ |
| 550 | STATIC uint |
| 551 | xfs_qm_qoff_logitem_trylock(xfs_qoff_logitem_t *qf) |
| 552 | { |
| 553 | return XFS_ITEM_LOCKED; |
| 554 | } |
| 555 | |
| 556 | /* |
| 557 | * Quotaoff items have no locking or pushing, so return failure |
| 558 | * so that the caller doesn't bother with us. |
| 559 | */ |
| 560 | /*ARGSUSED*/ |
| 561 | STATIC void |
| 562 | xfs_qm_qoff_logitem_unlock(xfs_qoff_logitem_t *qf) |
| 563 | { |
| 564 | return; |
| 565 | } |
| 566 | |
| 567 | /* |
| 568 | * The quotaoff-start-item is logged only once and cannot be moved in the log, |
| 569 | * so simply return the lsn at which it's been logged. |
| 570 | */ |
| 571 | /*ARGSUSED*/ |
| 572 | STATIC xfs_lsn_t |
| 573 | xfs_qm_qoff_logitem_committed(xfs_qoff_logitem_t *qf, xfs_lsn_t lsn) |
| 574 | { |
| 575 | return (lsn); |
| 576 | } |
| 577 | |
| 578 | /* |
| 579 | * The transaction of which this QUOTAOFF is a part has been aborted. |
| 580 | * Just clean up after ourselves. |
| 581 | * Shouldn't this never happen in the case of qoffend logitems? XXX |
| 582 | */ |
| 583 | STATIC void |
| 584 | xfs_qm_qoff_logitem_abort(xfs_qoff_logitem_t *qf) |
| 585 | { |
| 586 | kmem_free(qf, sizeof(xfs_qoff_logitem_t)); |
| 587 | } |
| 588 | |
| 589 | /* |
| 590 | * There isn't much you can do to push on an quotaoff item. It is simply |
| 591 | * stuck waiting for the log to be flushed to disk. |
| 592 | */ |
| 593 | /*ARGSUSED*/ |
| 594 | STATIC void |
| 595 | xfs_qm_qoff_logitem_push(xfs_qoff_logitem_t *qf) |
| 596 | { |
| 597 | return; |
| 598 | } |
| 599 | |
| 600 | |
| 601 | /*ARGSUSED*/ |
| 602 | STATIC xfs_lsn_t |
| 603 | xfs_qm_qoffend_logitem_committed( |
| 604 | xfs_qoff_logitem_t *qfe, |
| 605 | xfs_lsn_t lsn) |
| 606 | { |
| 607 | xfs_qoff_logitem_t *qfs; |
| 608 | SPLDECL(s); |
| 609 | |
| 610 | qfs = qfe->qql_start_lip; |
| 611 | AIL_LOCK(qfs->qql_item.li_mountp,s); |
| 612 | /* |
| 613 | * Delete the qoff-start logitem from the AIL. |
| 614 | * xfs_trans_delete_ail() drops the AIL lock. |
| 615 | */ |
| 616 | xfs_trans_delete_ail(qfs->qql_item.li_mountp, (xfs_log_item_t *)qfs, s); |
| 617 | kmem_free(qfs, sizeof(xfs_qoff_logitem_t)); |
| 618 | kmem_free(qfe, sizeof(xfs_qoff_logitem_t)); |
| 619 | return (xfs_lsn_t)-1; |
| 620 | } |
| 621 | |
| 622 | /* |
| 623 | * XXX rcc - don't know quite what to do with this. I think we can |
| 624 | * just ignore it. The only time that isn't the case is if we allow |
| 625 | * the client to somehow see that quotas have been turned off in which |
| 626 | * we can't allow that to get back until the quotaoff hits the disk. |
| 627 | * So how would that happen? Also, do we need different routines for |
| 628 | * quotaoff start and quotaoff end? I suspect the answer is yes but |
| 629 | * to be sure, I need to look at the recovery code and see how quota off |
| 630 | * recovery is handled (do we roll forward or back or do something else). |
| 631 | * If we roll forwards or backwards, then we need two separate routines, |
| 632 | * one that does nothing and one that stamps in the lsn that matters |
| 633 | * (truly makes the quotaoff irrevocable). If we do something else, |
| 634 | * then maybe we don't need two. |
| 635 | */ |
| 636 | /* ARGSUSED */ |
| 637 | STATIC void |
| 638 | xfs_qm_qoff_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn) |
| 639 | { |
| 640 | return; |
| 641 | } |
| 642 | |
| 643 | /* ARGSUSED */ |
| 644 | STATIC void |
| 645 | xfs_qm_qoffend_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn) |
| 646 | { |
| 647 | return; |
| 648 | } |
| 649 | |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 650 | STATIC struct xfs_item_ops xfs_qm_qoffend_logitem_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | .iop_size = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size, |
| 652 | .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*)) |
| 653 | xfs_qm_qoff_logitem_format, |
| 654 | .iop_pin = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin, |
| 655 | .iop_unpin = (void(*)(xfs_log_item_t* ,int)) |
| 656 | xfs_qm_qoff_logitem_unpin, |
| 657 | .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*)) |
| 658 | xfs_qm_qoff_logitem_unpin_remove, |
| 659 | .iop_trylock = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock, |
| 660 | .iop_unlock = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock, |
| 661 | .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t)) |
| 662 | xfs_qm_qoffend_logitem_committed, |
| 663 | .iop_push = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push, |
| 664 | .iop_abort = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_abort, |
| 665 | .iop_pushbuf = NULL, |
| 666 | .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) |
| 667 | xfs_qm_qoffend_logitem_committing |
| 668 | }; |
| 669 | |
| 670 | /* |
| 671 | * This is the ops vector shared by all quotaoff-start log items. |
| 672 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 673 | STATIC struct xfs_item_ops xfs_qm_qoff_logitem_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | .iop_size = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size, |
| 675 | .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*)) |
| 676 | xfs_qm_qoff_logitem_format, |
| 677 | .iop_pin = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin, |
| 678 | .iop_unpin = (void(*)(xfs_log_item_t*, int)) |
| 679 | xfs_qm_qoff_logitem_unpin, |
| 680 | .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*)) |
| 681 | xfs_qm_qoff_logitem_unpin_remove, |
| 682 | .iop_trylock = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock, |
| 683 | .iop_unlock = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock, |
| 684 | .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t)) |
| 685 | xfs_qm_qoff_logitem_committed, |
| 686 | .iop_push = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push, |
| 687 | .iop_abort = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_abort, |
| 688 | .iop_pushbuf = NULL, |
| 689 | .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) |
| 690 | xfs_qm_qoff_logitem_committing |
| 691 | }; |
| 692 | |
| 693 | /* |
| 694 | * Allocate and initialize an quotaoff item of the correct quota type(s). |
| 695 | */ |
| 696 | xfs_qoff_logitem_t * |
| 697 | xfs_qm_qoff_logitem_init( |
| 698 | struct xfs_mount *mp, |
| 699 | xfs_qoff_logitem_t *start, |
| 700 | uint flags) |
| 701 | { |
| 702 | xfs_qoff_logitem_t *qf; |
| 703 | |
| 704 | qf = (xfs_qoff_logitem_t*) kmem_zalloc(sizeof(xfs_qoff_logitem_t), KM_SLEEP); |
| 705 | |
| 706 | qf->qql_item.li_type = XFS_LI_QUOTAOFF; |
| 707 | if (start) |
| 708 | qf->qql_item.li_ops = &xfs_qm_qoffend_logitem_ops; |
| 709 | else |
| 710 | qf->qql_item.li_ops = &xfs_qm_qoff_logitem_ops; |
| 711 | qf->qql_item.li_mountp = mp; |
| 712 | qf->qql_format.qf_type = XFS_LI_QUOTAOFF; |
| 713 | qf->qql_format.qf_flags = flags; |
| 714 | qf->qql_start_lip = start; |
| 715 | return (qf); |
| 716 | } |