| 1 | /* |
| 2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it would be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write the Free Software Foundation, |
| 16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 17 | */ |
| 18 | |
| 19 | #include <linux/capability.h> |
| 20 | |
| 21 | #include "xfs.h" |
| 22 | #include "xfs_fs.h" |
| 23 | #include "xfs_shared.h" |
| 24 | #include "xfs_format.h" |
| 25 | #include "xfs_log_format.h" |
| 26 | #include "xfs_trans_resv.h" |
| 27 | #include "xfs_bit.h" |
| 28 | #include "xfs_sb.h" |
| 29 | #include "xfs_mount.h" |
| 30 | #include "xfs_inode.h" |
| 31 | #include "xfs_trans.h" |
| 32 | #include "xfs_error.h" |
| 33 | #include "xfs_quota.h" |
| 34 | #include "xfs_qm.h" |
| 35 | #include "xfs_trace.h" |
| 36 | #include "xfs_icache.h" |
| 37 | |
| 38 | STATIC int xfs_qm_log_quotaoff(xfs_mount_t *, xfs_qoff_logitem_t **, uint); |
| 39 | STATIC int xfs_qm_log_quotaoff_end(xfs_mount_t *, xfs_qoff_logitem_t *, |
| 40 | uint); |
| 41 | |
| 42 | /* |
| 43 | * Turn off quota accounting and/or enforcement for all udquots and/or |
| 44 | * gdquots. Called only at unmount time. |
| 45 | * |
| 46 | * This assumes that there are no dquots of this file system cached |
| 47 | * incore, and modifies the ondisk dquot directly. Therefore, for example, |
| 48 | * it is an error to call this twice, without purging the cache. |
| 49 | */ |
| 50 | int |
| 51 | xfs_qm_scall_quotaoff( |
| 52 | xfs_mount_t *mp, |
| 53 | uint flags) |
| 54 | { |
| 55 | struct xfs_quotainfo *q = mp->m_quotainfo; |
| 56 | uint dqtype; |
| 57 | int error; |
| 58 | uint inactivate_flags; |
| 59 | xfs_qoff_logitem_t *qoffstart; |
| 60 | |
| 61 | /* |
| 62 | * No file system can have quotas enabled on disk but not in core. |
| 63 | * Note that quota utilities (like quotaoff) _expect_ |
| 64 | * errno == -EEXIST here. |
| 65 | */ |
| 66 | if ((mp->m_qflags & flags) == 0) |
| 67 | return -EEXIST; |
| 68 | error = 0; |
| 69 | |
| 70 | flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD); |
| 71 | |
| 72 | /* |
| 73 | * We don't want to deal with two quotaoffs messing up each other, |
| 74 | * so we're going to serialize it. quotaoff isn't exactly a performance |
| 75 | * critical thing. |
| 76 | * If quotaoff, then we must be dealing with the root filesystem. |
| 77 | */ |
| 78 | ASSERT(q); |
| 79 | mutex_lock(&q->qi_quotaofflock); |
| 80 | |
| 81 | /* |
| 82 | * If we're just turning off quota enforcement, change mp and go. |
| 83 | */ |
| 84 | if ((flags & XFS_ALL_QUOTA_ACCT) == 0) { |
| 85 | mp->m_qflags &= ~(flags); |
| 86 | |
| 87 | spin_lock(&mp->m_sb_lock); |
| 88 | mp->m_sb.sb_qflags = mp->m_qflags; |
| 89 | spin_unlock(&mp->m_sb_lock); |
| 90 | mutex_unlock(&q->qi_quotaofflock); |
| 91 | |
| 92 | /* XXX what to do if error ? Revert back to old vals incore ? */ |
| 93 | return xfs_sync_sb(mp, false); |
| 94 | } |
| 95 | |
| 96 | dqtype = 0; |
| 97 | inactivate_flags = 0; |
| 98 | /* |
| 99 | * If accounting is off, we must turn enforcement off, clear the |
| 100 | * quota 'CHKD' certificate to make it known that we have to |
| 101 | * do a quotacheck the next time this quota is turned on. |
| 102 | */ |
| 103 | if (flags & XFS_UQUOTA_ACCT) { |
| 104 | dqtype |= XFS_QMOPT_UQUOTA; |
| 105 | flags |= (XFS_UQUOTA_CHKD | XFS_UQUOTA_ENFD); |
| 106 | inactivate_flags |= XFS_UQUOTA_ACTIVE; |
| 107 | } |
| 108 | if (flags & XFS_GQUOTA_ACCT) { |
| 109 | dqtype |= XFS_QMOPT_GQUOTA; |
| 110 | flags |= (XFS_GQUOTA_CHKD | XFS_GQUOTA_ENFD); |
| 111 | inactivate_flags |= XFS_GQUOTA_ACTIVE; |
| 112 | } |
| 113 | if (flags & XFS_PQUOTA_ACCT) { |
| 114 | dqtype |= XFS_QMOPT_PQUOTA; |
| 115 | flags |= (XFS_PQUOTA_CHKD | XFS_PQUOTA_ENFD); |
| 116 | inactivate_flags |= XFS_PQUOTA_ACTIVE; |
| 117 | } |
| 118 | |
| 119 | /* |
| 120 | * Nothing to do? Don't complain. This happens when we're just |
| 121 | * turning off quota enforcement. |
| 122 | */ |
| 123 | if ((mp->m_qflags & flags) == 0) |
| 124 | goto out_unlock; |
| 125 | |
| 126 | /* |
| 127 | * Write the LI_QUOTAOFF log record, and do SB changes atomically, |
| 128 | * and synchronously. If we fail to write, we should abort the |
| 129 | * operation as it cannot be recovered safely if we crash. |
| 130 | */ |
| 131 | error = xfs_qm_log_quotaoff(mp, &qoffstart, flags); |
| 132 | if (error) |
| 133 | goto out_unlock; |
| 134 | |
| 135 | /* |
| 136 | * Next we clear the XFS_MOUNT_*DQ_ACTIVE bit(s) in the mount struct |
| 137 | * to take care of the race between dqget and quotaoff. We don't take |
| 138 | * any special locks to reset these bits. All processes need to check |
| 139 | * these bits *after* taking inode lock(s) to see if the particular |
| 140 | * quota type is in the process of being turned off. If *ACTIVE, it is |
| 141 | * guaranteed that all dquot structures and all quotainode ptrs will all |
| 142 | * stay valid as long as that inode is kept locked. |
| 143 | * |
| 144 | * There is no turning back after this. |
| 145 | */ |
| 146 | mp->m_qflags &= ~inactivate_flags; |
| 147 | |
| 148 | /* |
| 149 | * Give back all the dquot reference(s) held by inodes. |
| 150 | * Here we go thru every single incore inode in this file system, and |
| 151 | * do a dqrele on the i_udquot/i_gdquot that it may have. |
| 152 | * Essentially, as long as somebody has an inode locked, this guarantees |
| 153 | * that quotas will not be turned off. This is handy because in a |
| 154 | * transaction once we lock the inode(s) and check for quotaon, we can |
| 155 | * depend on the quota inodes (and other things) being valid as long as |
| 156 | * we keep the lock(s). |
| 157 | */ |
| 158 | xfs_qm_dqrele_all_inodes(mp, flags); |
| 159 | |
| 160 | /* |
| 161 | * Next we make the changes in the quota flag in the mount struct. |
| 162 | * This isn't protected by a particular lock directly, because we |
| 163 | * don't want to take a mrlock every time we depend on quotas being on. |
| 164 | */ |
| 165 | mp->m_qflags &= ~flags; |
| 166 | |
| 167 | /* |
| 168 | * Go through all the dquots of this file system and purge them, |
| 169 | * according to what was turned off. |
| 170 | */ |
| 171 | xfs_qm_dqpurge_all(mp, dqtype); |
| 172 | |
| 173 | /* |
| 174 | * Transactions that had started before ACTIVE state bit was cleared |
| 175 | * could have logged many dquots, so they'd have higher LSNs than |
| 176 | * the first QUOTAOFF log record does. If we happen to crash when |
| 177 | * the tail of the log has gone past the QUOTAOFF record, but |
| 178 | * before the last dquot modification, those dquots __will__ |
| 179 | * recover, and that's not good. |
| 180 | * |
| 181 | * So, we have QUOTAOFF start and end logitems; the start |
| 182 | * logitem won't get overwritten until the end logitem appears... |
| 183 | */ |
| 184 | error = xfs_qm_log_quotaoff_end(mp, qoffstart, flags); |
| 185 | if (error) { |
| 186 | /* We're screwed now. Shutdown is the only option. */ |
| 187 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
| 188 | goto out_unlock; |
| 189 | } |
| 190 | |
| 191 | /* |
| 192 | * If all quotas are completely turned off, close shop. |
| 193 | */ |
| 194 | if (mp->m_qflags == 0) { |
| 195 | mutex_unlock(&q->qi_quotaofflock); |
| 196 | xfs_qm_destroy_quotainfo(mp); |
| 197 | return 0; |
| 198 | } |
| 199 | |
| 200 | /* |
| 201 | * Release our quotainode references if we don't need them anymore. |
| 202 | */ |
| 203 | if ((dqtype & XFS_QMOPT_UQUOTA) && q->qi_uquotaip) { |
| 204 | IRELE(q->qi_uquotaip); |
| 205 | q->qi_uquotaip = NULL; |
| 206 | } |
| 207 | if ((dqtype & XFS_QMOPT_GQUOTA) && q->qi_gquotaip) { |
| 208 | IRELE(q->qi_gquotaip); |
| 209 | q->qi_gquotaip = NULL; |
| 210 | } |
| 211 | if ((dqtype & XFS_QMOPT_PQUOTA) && q->qi_pquotaip) { |
| 212 | IRELE(q->qi_pquotaip); |
| 213 | q->qi_pquotaip = NULL; |
| 214 | } |
| 215 | |
| 216 | out_unlock: |
| 217 | mutex_unlock(&q->qi_quotaofflock); |
| 218 | return error; |
| 219 | } |
| 220 | |
| 221 | STATIC int |
| 222 | xfs_qm_scall_trunc_qfile( |
| 223 | struct xfs_mount *mp, |
| 224 | xfs_ino_t ino) |
| 225 | { |
| 226 | struct xfs_inode *ip; |
| 227 | struct xfs_trans *tp; |
| 228 | int error; |
| 229 | |
| 230 | if (ino == NULLFSINO) |
| 231 | return 0; |
| 232 | |
| 233 | error = xfs_iget(mp, NULL, ino, 0, 0, &ip); |
| 234 | if (error) |
| 235 | return error; |
| 236 | |
| 237 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
| 238 | |
| 239 | tp = xfs_trans_alloc(mp, XFS_TRANS_TRUNCATE_FILE); |
| 240 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0); |
| 241 | if (error) { |
| 242 | xfs_trans_cancel(tp); |
| 243 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
| 244 | goto out_put; |
| 245 | } |
| 246 | |
| 247 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 248 | xfs_trans_ijoin(tp, ip, 0); |
| 249 | |
| 250 | ip->i_d.di_size = 0; |
| 251 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 252 | |
| 253 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, 0); |
| 254 | if (error) { |
| 255 | xfs_trans_cancel(tp); |
| 256 | goto out_unlock; |
| 257 | } |
| 258 | |
| 259 | ASSERT(ip->i_d.di_nextents == 0); |
| 260 | |
| 261 | xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
| 262 | error = xfs_trans_commit(tp); |
| 263 | |
| 264 | out_unlock: |
| 265 | xfs_iunlock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); |
| 266 | out_put: |
| 267 | IRELE(ip); |
| 268 | return error; |
| 269 | } |
| 270 | |
| 271 | int |
| 272 | xfs_qm_scall_trunc_qfiles( |
| 273 | xfs_mount_t *mp, |
| 274 | uint flags) |
| 275 | { |
| 276 | int error = -EINVAL; |
| 277 | |
| 278 | if (!xfs_sb_version_hasquota(&mp->m_sb) || flags == 0 || |
| 279 | (flags & ~XFS_DQ_ALLTYPES)) { |
| 280 | xfs_debug(mp, "%s: flags=%x m_qflags=%x", |
| 281 | __func__, flags, mp->m_qflags); |
| 282 | return -EINVAL; |
| 283 | } |
| 284 | |
| 285 | if (flags & XFS_DQ_USER) { |
| 286 | error = xfs_qm_scall_trunc_qfile(mp, mp->m_sb.sb_uquotino); |
| 287 | if (error) |
| 288 | return error; |
| 289 | } |
| 290 | if (flags & XFS_DQ_GROUP) { |
| 291 | error = xfs_qm_scall_trunc_qfile(mp, mp->m_sb.sb_gquotino); |
| 292 | if (error) |
| 293 | return error; |
| 294 | } |
| 295 | if (flags & XFS_DQ_PROJ) |
| 296 | error = xfs_qm_scall_trunc_qfile(mp, mp->m_sb.sb_pquotino); |
| 297 | |
| 298 | return error; |
| 299 | } |
| 300 | |
| 301 | /* |
| 302 | * Switch on (a given) quota enforcement for a filesystem. This takes |
| 303 | * effect immediately. |
| 304 | * (Switching on quota accounting must be done at mount time.) |
| 305 | */ |
| 306 | int |
| 307 | xfs_qm_scall_quotaon( |
| 308 | xfs_mount_t *mp, |
| 309 | uint flags) |
| 310 | { |
| 311 | int error; |
| 312 | uint qf; |
| 313 | |
| 314 | flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD); |
| 315 | /* |
| 316 | * Switching on quota accounting must be done at mount time. |
| 317 | */ |
| 318 | flags &= ~(XFS_ALL_QUOTA_ACCT); |
| 319 | |
| 320 | if (flags == 0) { |
| 321 | xfs_debug(mp, "%s: zero flags, m_qflags=%x", |
| 322 | __func__, mp->m_qflags); |
| 323 | return -EINVAL; |
| 324 | } |
| 325 | |
| 326 | /* |
| 327 | * Can't enforce without accounting. We check the superblock |
| 328 | * qflags here instead of m_qflags because rootfs can have |
| 329 | * quota acct on ondisk without m_qflags' knowing. |
| 330 | */ |
| 331 | if (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) == 0 && |
| 332 | (flags & XFS_UQUOTA_ENFD)) || |
| 333 | ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) == 0 && |
| 334 | (flags & XFS_GQUOTA_ENFD)) || |
| 335 | ((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) == 0 && |
| 336 | (flags & XFS_PQUOTA_ENFD))) { |
| 337 | xfs_debug(mp, |
| 338 | "%s: Can't enforce without acct, flags=%x sbflags=%x", |
| 339 | __func__, flags, mp->m_sb.sb_qflags); |
| 340 | return -EINVAL; |
| 341 | } |
| 342 | /* |
| 343 | * If everything's up to-date incore, then don't waste time. |
| 344 | */ |
| 345 | if ((mp->m_qflags & flags) == flags) |
| 346 | return -EEXIST; |
| 347 | |
| 348 | /* |
| 349 | * Change sb_qflags on disk but not incore mp->qflags |
| 350 | * if this is the root filesystem. |
| 351 | */ |
| 352 | spin_lock(&mp->m_sb_lock); |
| 353 | qf = mp->m_sb.sb_qflags; |
| 354 | mp->m_sb.sb_qflags = qf | flags; |
| 355 | spin_unlock(&mp->m_sb_lock); |
| 356 | |
| 357 | /* |
| 358 | * There's nothing to change if it's the same. |
| 359 | */ |
| 360 | if ((qf & flags) == flags) |
| 361 | return -EEXIST; |
| 362 | |
| 363 | error = xfs_sync_sb(mp, false); |
| 364 | if (error) |
| 365 | return error; |
| 366 | /* |
| 367 | * If we aren't trying to switch on quota enforcement, we are done. |
| 368 | */ |
| 369 | if (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) != |
| 370 | (mp->m_qflags & XFS_UQUOTA_ACCT)) || |
| 371 | ((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) != |
| 372 | (mp->m_qflags & XFS_PQUOTA_ACCT)) || |
| 373 | ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) != |
| 374 | (mp->m_qflags & XFS_GQUOTA_ACCT))) |
| 375 | return 0; |
| 376 | |
| 377 | if (! XFS_IS_QUOTA_RUNNING(mp)) |
| 378 | return -ESRCH; |
| 379 | |
| 380 | /* |
| 381 | * Switch on quota enforcement in core. |
| 382 | */ |
| 383 | mutex_lock(&mp->m_quotainfo->qi_quotaofflock); |
| 384 | mp->m_qflags |= (flags & XFS_ALL_QUOTA_ENFD); |
| 385 | mutex_unlock(&mp->m_quotainfo->qi_quotaofflock); |
| 386 | |
| 387 | return 0; |
| 388 | } |
| 389 | |
| 390 | #define XFS_QC_MASK \ |
| 391 | (QC_LIMIT_MASK | QC_TIMER_MASK | QC_WARNS_MASK) |
| 392 | |
| 393 | /* |
| 394 | * Adjust quota limits, and start/stop timers accordingly. |
| 395 | */ |
| 396 | int |
| 397 | xfs_qm_scall_setqlim( |
| 398 | struct xfs_mount *mp, |
| 399 | xfs_dqid_t id, |
| 400 | uint type, |
| 401 | struct qc_dqblk *newlim) |
| 402 | { |
| 403 | struct xfs_quotainfo *q = mp->m_quotainfo; |
| 404 | struct xfs_disk_dquot *ddq; |
| 405 | struct xfs_dquot *dqp; |
| 406 | struct xfs_trans *tp; |
| 407 | int error; |
| 408 | xfs_qcnt_t hard, soft; |
| 409 | |
| 410 | if (newlim->d_fieldmask & ~XFS_QC_MASK) |
| 411 | return -EINVAL; |
| 412 | if ((newlim->d_fieldmask & XFS_QC_MASK) == 0) |
| 413 | return 0; |
| 414 | |
| 415 | /* |
| 416 | * We don't want to race with a quotaoff so take the quotaoff lock. |
| 417 | * We don't hold an inode lock, so there's nothing else to stop |
| 418 | * a quotaoff from happening. |
| 419 | */ |
| 420 | mutex_lock(&q->qi_quotaofflock); |
| 421 | |
| 422 | /* |
| 423 | * Get the dquot (locked) before we start, as we need to do a |
| 424 | * transaction to allocate it if it doesn't exist. Once we have the |
| 425 | * dquot, unlock it so we can start the next transaction safely. We hold |
| 426 | * a reference to the dquot, so it's safe to do this unlock/lock without |
| 427 | * it being reclaimed in the mean time. |
| 428 | */ |
| 429 | error = xfs_qm_dqget(mp, NULL, id, type, XFS_QMOPT_DQALLOC, &dqp); |
| 430 | if (error) { |
| 431 | ASSERT(error != -ENOENT); |
| 432 | goto out_unlock; |
| 433 | } |
| 434 | xfs_dqunlock(dqp); |
| 435 | |
| 436 | tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SETQLIM); |
| 437 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_setqlim, 0, 0); |
| 438 | if (error) { |
| 439 | xfs_trans_cancel(tp); |
| 440 | goto out_rele; |
| 441 | } |
| 442 | |
| 443 | xfs_dqlock(dqp); |
| 444 | xfs_trans_dqjoin(tp, dqp); |
| 445 | ddq = &dqp->q_core; |
| 446 | |
| 447 | /* |
| 448 | * Make sure that hardlimits are >= soft limits before changing. |
| 449 | */ |
| 450 | hard = (newlim->d_fieldmask & QC_SPC_HARD) ? |
| 451 | (xfs_qcnt_t) XFS_B_TO_FSB(mp, newlim->d_spc_hardlimit) : |
| 452 | be64_to_cpu(ddq->d_blk_hardlimit); |
| 453 | soft = (newlim->d_fieldmask & QC_SPC_SOFT) ? |
| 454 | (xfs_qcnt_t) XFS_B_TO_FSB(mp, newlim->d_spc_softlimit) : |
| 455 | be64_to_cpu(ddq->d_blk_softlimit); |
| 456 | if (hard == 0 || hard >= soft) { |
| 457 | ddq->d_blk_hardlimit = cpu_to_be64(hard); |
| 458 | ddq->d_blk_softlimit = cpu_to_be64(soft); |
| 459 | xfs_dquot_set_prealloc_limits(dqp); |
| 460 | if (id == 0) { |
| 461 | q->qi_bhardlimit = hard; |
| 462 | q->qi_bsoftlimit = soft; |
| 463 | } |
| 464 | } else { |
| 465 | xfs_debug(mp, "blkhard %Ld < blksoft %Ld", hard, soft); |
| 466 | } |
| 467 | hard = (newlim->d_fieldmask & QC_RT_SPC_HARD) ? |
| 468 | (xfs_qcnt_t) XFS_B_TO_FSB(mp, newlim->d_rt_spc_hardlimit) : |
| 469 | be64_to_cpu(ddq->d_rtb_hardlimit); |
| 470 | soft = (newlim->d_fieldmask & QC_RT_SPC_SOFT) ? |
| 471 | (xfs_qcnt_t) XFS_B_TO_FSB(mp, newlim->d_rt_spc_softlimit) : |
| 472 | be64_to_cpu(ddq->d_rtb_softlimit); |
| 473 | if (hard == 0 || hard >= soft) { |
| 474 | ddq->d_rtb_hardlimit = cpu_to_be64(hard); |
| 475 | ddq->d_rtb_softlimit = cpu_to_be64(soft); |
| 476 | if (id == 0) { |
| 477 | q->qi_rtbhardlimit = hard; |
| 478 | q->qi_rtbsoftlimit = soft; |
| 479 | } |
| 480 | } else { |
| 481 | xfs_debug(mp, "rtbhard %Ld < rtbsoft %Ld", hard, soft); |
| 482 | } |
| 483 | |
| 484 | hard = (newlim->d_fieldmask & QC_INO_HARD) ? |
| 485 | (xfs_qcnt_t) newlim->d_ino_hardlimit : |
| 486 | be64_to_cpu(ddq->d_ino_hardlimit); |
| 487 | soft = (newlim->d_fieldmask & QC_INO_SOFT) ? |
| 488 | (xfs_qcnt_t) newlim->d_ino_softlimit : |
| 489 | be64_to_cpu(ddq->d_ino_softlimit); |
| 490 | if (hard == 0 || hard >= soft) { |
| 491 | ddq->d_ino_hardlimit = cpu_to_be64(hard); |
| 492 | ddq->d_ino_softlimit = cpu_to_be64(soft); |
| 493 | if (id == 0) { |
| 494 | q->qi_ihardlimit = hard; |
| 495 | q->qi_isoftlimit = soft; |
| 496 | } |
| 497 | } else { |
| 498 | xfs_debug(mp, "ihard %Ld < isoft %Ld", hard, soft); |
| 499 | } |
| 500 | |
| 501 | /* |
| 502 | * Update warnings counter(s) if requested |
| 503 | */ |
| 504 | if (newlim->d_fieldmask & QC_SPC_WARNS) |
| 505 | ddq->d_bwarns = cpu_to_be16(newlim->d_spc_warns); |
| 506 | if (newlim->d_fieldmask & QC_INO_WARNS) |
| 507 | ddq->d_iwarns = cpu_to_be16(newlim->d_ino_warns); |
| 508 | if (newlim->d_fieldmask & QC_RT_SPC_WARNS) |
| 509 | ddq->d_rtbwarns = cpu_to_be16(newlim->d_rt_spc_warns); |
| 510 | |
| 511 | if (id == 0) { |
| 512 | /* |
| 513 | * Timelimits for the super user set the relative time |
| 514 | * the other users can be over quota for this file system. |
| 515 | * If it is zero a default is used. Ditto for the default |
| 516 | * soft and hard limit values (already done, above), and |
| 517 | * for warnings. |
| 518 | */ |
| 519 | if (newlim->d_fieldmask & QC_SPC_TIMER) { |
| 520 | q->qi_btimelimit = newlim->d_spc_timer; |
| 521 | ddq->d_btimer = cpu_to_be32(newlim->d_spc_timer); |
| 522 | } |
| 523 | if (newlim->d_fieldmask & QC_INO_TIMER) { |
| 524 | q->qi_itimelimit = newlim->d_ino_timer; |
| 525 | ddq->d_itimer = cpu_to_be32(newlim->d_ino_timer); |
| 526 | } |
| 527 | if (newlim->d_fieldmask & QC_RT_SPC_TIMER) { |
| 528 | q->qi_rtbtimelimit = newlim->d_rt_spc_timer; |
| 529 | ddq->d_rtbtimer = cpu_to_be32(newlim->d_rt_spc_timer); |
| 530 | } |
| 531 | if (newlim->d_fieldmask & QC_SPC_WARNS) |
| 532 | q->qi_bwarnlimit = newlim->d_spc_warns; |
| 533 | if (newlim->d_fieldmask & QC_INO_WARNS) |
| 534 | q->qi_iwarnlimit = newlim->d_ino_warns; |
| 535 | if (newlim->d_fieldmask & QC_RT_SPC_WARNS) |
| 536 | q->qi_rtbwarnlimit = newlim->d_rt_spc_warns; |
| 537 | } else { |
| 538 | /* |
| 539 | * If the user is now over quota, start the timelimit. |
| 540 | * The user will not be 'warned'. |
| 541 | * Note that we keep the timers ticking, whether enforcement |
| 542 | * is on or off. We don't really want to bother with iterating |
| 543 | * over all ondisk dquots and turning the timers on/off. |
| 544 | */ |
| 545 | xfs_qm_adjust_dqtimers(mp, ddq); |
| 546 | } |
| 547 | dqp->dq_flags |= XFS_DQ_DIRTY; |
| 548 | xfs_trans_log_dquot(tp, dqp); |
| 549 | |
| 550 | error = xfs_trans_commit(tp); |
| 551 | |
| 552 | out_rele: |
| 553 | xfs_qm_dqrele(dqp); |
| 554 | out_unlock: |
| 555 | mutex_unlock(&q->qi_quotaofflock); |
| 556 | return error; |
| 557 | } |
| 558 | |
| 559 | STATIC int |
| 560 | xfs_qm_log_quotaoff_end( |
| 561 | xfs_mount_t *mp, |
| 562 | xfs_qoff_logitem_t *startqoff, |
| 563 | uint flags) |
| 564 | { |
| 565 | xfs_trans_t *tp; |
| 566 | int error; |
| 567 | xfs_qoff_logitem_t *qoffi; |
| 568 | |
| 569 | tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF_END); |
| 570 | |
| 571 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_equotaoff, 0, 0); |
| 572 | if (error) { |
| 573 | xfs_trans_cancel(tp); |
| 574 | return error; |
| 575 | } |
| 576 | |
| 577 | qoffi = xfs_trans_get_qoff_item(tp, startqoff, |
| 578 | flags & XFS_ALL_QUOTA_ACCT); |
| 579 | xfs_trans_log_quotaoff_item(tp, qoffi); |
| 580 | |
| 581 | /* |
| 582 | * We have to make sure that the transaction is secure on disk before we |
| 583 | * return and actually stop quota accounting. So, make it synchronous. |
| 584 | * We don't care about quotoff's performance. |
| 585 | */ |
| 586 | xfs_trans_set_sync(tp); |
| 587 | return xfs_trans_commit(tp); |
| 588 | } |
| 589 | |
| 590 | |
| 591 | STATIC int |
| 592 | xfs_qm_log_quotaoff( |
| 593 | xfs_mount_t *mp, |
| 594 | xfs_qoff_logitem_t **qoffstartp, |
| 595 | uint flags) |
| 596 | { |
| 597 | xfs_trans_t *tp; |
| 598 | int error; |
| 599 | xfs_qoff_logitem_t *qoffi; |
| 600 | |
| 601 | *qoffstartp = NULL; |
| 602 | |
| 603 | tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF); |
| 604 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_quotaoff, 0, 0); |
| 605 | if (error) { |
| 606 | xfs_trans_cancel(tp); |
| 607 | goto out; |
| 608 | } |
| 609 | |
| 610 | qoffi = xfs_trans_get_qoff_item(tp, NULL, flags & XFS_ALL_QUOTA_ACCT); |
| 611 | xfs_trans_log_quotaoff_item(tp, qoffi); |
| 612 | |
| 613 | spin_lock(&mp->m_sb_lock); |
| 614 | mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL; |
| 615 | spin_unlock(&mp->m_sb_lock); |
| 616 | |
| 617 | xfs_log_sb(tp); |
| 618 | |
| 619 | /* |
| 620 | * We have to make sure that the transaction is secure on disk before we |
| 621 | * return and actually stop quota accounting. So, make it synchronous. |
| 622 | * We don't care about quotoff's performance. |
| 623 | */ |
| 624 | xfs_trans_set_sync(tp); |
| 625 | error = xfs_trans_commit(tp); |
| 626 | if (error) |
| 627 | goto out; |
| 628 | |
| 629 | *qoffstartp = qoffi; |
| 630 | out: |
| 631 | return error; |
| 632 | } |
| 633 | |
| 634 | |
| 635 | int |
| 636 | xfs_qm_scall_getquota( |
| 637 | struct xfs_mount *mp, |
| 638 | xfs_dqid_t id, |
| 639 | uint type, |
| 640 | struct qc_dqblk *dst) |
| 641 | { |
| 642 | struct xfs_dquot *dqp; |
| 643 | int error; |
| 644 | |
| 645 | /* |
| 646 | * Try to get the dquot. We don't want it allocated on disk, so |
| 647 | * we aren't passing the XFS_QMOPT_DOALLOC flag. If it doesn't |
| 648 | * exist, we'll get ENOENT back. |
| 649 | */ |
| 650 | error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp); |
| 651 | if (error) |
| 652 | return error; |
| 653 | |
| 654 | /* |
| 655 | * If everything's NULL, this dquot doesn't quite exist as far as |
| 656 | * our utility programs are concerned. |
| 657 | */ |
| 658 | if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) { |
| 659 | error = -ENOENT; |
| 660 | goto out_put; |
| 661 | } |
| 662 | |
| 663 | memset(dst, 0, sizeof(*dst)); |
| 664 | dst->d_spc_hardlimit = |
| 665 | XFS_FSB_TO_B(mp, be64_to_cpu(dqp->q_core.d_blk_hardlimit)); |
| 666 | dst->d_spc_softlimit = |
| 667 | XFS_FSB_TO_B(mp, be64_to_cpu(dqp->q_core.d_blk_softlimit)); |
| 668 | dst->d_ino_hardlimit = be64_to_cpu(dqp->q_core.d_ino_hardlimit); |
| 669 | dst->d_ino_softlimit = be64_to_cpu(dqp->q_core.d_ino_softlimit); |
| 670 | dst->d_space = XFS_FSB_TO_B(mp, dqp->q_res_bcount); |
| 671 | dst->d_ino_count = dqp->q_res_icount; |
| 672 | dst->d_spc_timer = be32_to_cpu(dqp->q_core.d_btimer); |
| 673 | dst->d_ino_timer = be32_to_cpu(dqp->q_core.d_itimer); |
| 674 | dst->d_ino_warns = be16_to_cpu(dqp->q_core.d_iwarns); |
| 675 | dst->d_spc_warns = be16_to_cpu(dqp->q_core.d_bwarns); |
| 676 | dst->d_rt_spc_hardlimit = |
| 677 | XFS_FSB_TO_B(mp, be64_to_cpu(dqp->q_core.d_rtb_hardlimit)); |
| 678 | dst->d_rt_spc_softlimit = |
| 679 | XFS_FSB_TO_B(mp, be64_to_cpu(dqp->q_core.d_rtb_softlimit)); |
| 680 | dst->d_rt_space = XFS_FSB_TO_B(mp, dqp->q_res_rtbcount); |
| 681 | dst->d_rt_spc_timer = be32_to_cpu(dqp->q_core.d_rtbtimer); |
| 682 | dst->d_rt_spc_warns = be16_to_cpu(dqp->q_core.d_rtbwarns); |
| 683 | |
| 684 | /* |
| 685 | * Internally, we don't reset all the timers when quota enforcement |
| 686 | * gets turned off. No need to confuse the user level code, |
| 687 | * so return zeroes in that case. |
| 688 | */ |
| 689 | if ((!XFS_IS_UQUOTA_ENFORCED(mp) && |
| 690 | dqp->q_core.d_flags == XFS_DQ_USER) || |
| 691 | (!XFS_IS_GQUOTA_ENFORCED(mp) && |
| 692 | dqp->q_core.d_flags == XFS_DQ_GROUP) || |
| 693 | (!XFS_IS_PQUOTA_ENFORCED(mp) && |
| 694 | dqp->q_core.d_flags == XFS_DQ_PROJ)) { |
| 695 | dst->d_spc_timer = 0; |
| 696 | dst->d_ino_timer = 0; |
| 697 | dst->d_rt_spc_timer = 0; |
| 698 | } |
| 699 | |
| 700 | #ifdef DEBUG |
| 701 | if (((XFS_IS_UQUOTA_ENFORCED(mp) && type == XFS_DQ_USER) || |
| 702 | (XFS_IS_GQUOTA_ENFORCED(mp) && type == XFS_DQ_GROUP) || |
| 703 | (XFS_IS_PQUOTA_ENFORCED(mp) && type == XFS_DQ_PROJ)) && |
| 704 | id != 0) { |
| 705 | if ((dst->d_space > dst->d_spc_softlimit) && |
| 706 | (dst->d_spc_softlimit > 0)) { |
| 707 | ASSERT(dst->d_spc_timer != 0); |
| 708 | } |
| 709 | if ((dst->d_ino_count > dst->d_ino_softlimit) && |
| 710 | (dst->d_ino_softlimit > 0)) { |
| 711 | ASSERT(dst->d_ino_timer != 0); |
| 712 | } |
| 713 | } |
| 714 | #endif |
| 715 | out_put: |
| 716 | xfs_qm_dqput(dqp); |
| 717 | return error; |
| 718 | } |
| 719 | |
| 720 | |
| 721 | STATIC int |
| 722 | xfs_dqrele_inode( |
| 723 | struct xfs_inode *ip, |
| 724 | int flags, |
| 725 | void *args) |
| 726 | { |
| 727 | /* skip quota inodes */ |
| 728 | if (ip == ip->i_mount->m_quotainfo->qi_uquotaip || |
| 729 | ip == ip->i_mount->m_quotainfo->qi_gquotaip || |
| 730 | ip == ip->i_mount->m_quotainfo->qi_pquotaip) { |
| 731 | ASSERT(ip->i_udquot == NULL); |
| 732 | ASSERT(ip->i_gdquot == NULL); |
| 733 | ASSERT(ip->i_pdquot == NULL); |
| 734 | return 0; |
| 735 | } |
| 736 | |
| 737 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 738 | if ((flags & XFS_UQUOTA_ACCT) && ip->i_udquot) { |
| 739 | xfs_qm_dqrele(ip->i_udquot); |
| 740 | ip->i_udquot = NULL; |
| 741 | } |
| 742 | if ((flags & XFS_GQUOTA_ACCT) && ip->i_gdquot) { |
| 743 | xfs_qm_dqrele(ip->i_gdquot); |
| 744 | ip->i_gdquot = NULL; |
| 745 | } |
| 746 | if ((flags & XFS_PQUOTA_ACCT) && ip->i_pdquot) { |
| 747 | xfs_qm_dqrele(ip->i_pdquot); |
| 748 | ip->i_pdquot = NULL; |
| 749 | } |
| 750 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 751 | return 0; |
| 752 | } |
| 753 | |
| 754 | |
| 755 | /* |
| 756 | * Go thru all the inodes in the file system, releasing their dquots. |
| 757 | * |
| 758 | * Note that the mount structure gets modified to indicate that quotas are off |
| 759 | * AFTER this, in the case of quotaoff. |
| 760 | */ |
| 761 | void |
| 762 | xfs_qm_dqrele_all_inodes( |
| 763 | struct xfs_mount *mp, |
| 764 | uint flags) |
| 765 | { |
| 766 | ASSERT(mp->m_quotainfo); |
| 767 | xfs_inode_ag_iterator(mp, xfs_dqrele_inode, flags, NULL); |
| 768 | } |