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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.4 * All Rights Reserved.5 */6 7 8#include "xfs.h"9#include "xfs_fs.h"10#include "xfs_shared.h"11#include "xfs_format.h"12#include "xfs_log_format.h"13#include "xfs_trans_resv.h"14#include "xfs_sb.h"15#include "xfs_mount.h"16#include "xfs_inode.h"17#include "xfs_trans.h"18#include "xfs_quota.h"19#include "xfs_qm.h"20#include "xfs_icache.h"21 22int23xfs_qm_scall_quotaoff(24 xfs_mount_t *mp,25 uint flags)26{27 /*28 * No file system can have quotas enabled on disk but not in core.29 * Note that quota utilities (like quotaoff) _expect_30 * errno == -EEXIST here.31 */32 if ((mp->m_qflags & flags) == 0)33 return -EEXIST;34 35 /*36 * We do not support actually turning off quota accounting any more.37 * Just log a warning and ignore the accounting related flags.38 */39 if (flags & XFS_ALL_QUOTA_ACCT)40 xfs_info(mp, "disabling of quota accounting not supported.");41 42 mutex_lock(&mp->m_quotainfo->qi_quotaofflock);43 mp->m_qflags &= ~(flags & XFS_ALL_QUOTA_ENFD);44 spin_lock(&mp->m_sb_lock);45 mp->m_sb.sb_qflags = mp->m_qflags;46 spin_unlock(&mp->m_sb_lock);47 mutex_unlock(&mp->m_quotainfo->qi_quotaofflock);48 49 /* XXX what to do if error ? Revert back to old vals incore ? */50 return xfs_sync_sb(mp, false);51}52 53STATIC int54xfs_qm_scall_trunc_qfile(55 struct xfs_mount *mp,56 xfs_dqtype_t type)57{58 struct xfs_inode *ip;59 struct xfs_trans *tp;60 int error;61 62 error = xfs_qm_qino_load(mp, type, &ip);63 if (error == -ENOENT)64 return 0;65 if (error)66 return error;67 68 xfs_ilock(ip, XFS_IOLOCK_EXCL);69 70 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp);71 if (error) {72 xfs_iunlock(ip, XFS_IOLOCK_EXCL);73 goto out_put;74 }75 76 xfs_ilock(ip, XFS_ILOCK_EXCL);77 xfs_trans_ijoin(tp, ip, 0);78 79 ip->i_disk_size = 0;80 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);81 82 error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, 0);83 if (error) {84 xfs_trans_cancel(tp);85 goto out_unlock;86 }87 88 ASSERT(ip->i_df.if_nextents == 0);89 90 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);91 error = xfs_trans_commit(tp);92 93out_unlock:94 xfs_iunlock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);95out_put:96 xfs_irele(ip);97 return error;98}99 100int101xfs_qm_scall_trunc_qfiles(102 xfs_mount_t *mp,103 uint flags)104{105 int error = -EINVAL;106 107 if (!xfs_has_quota(mp) || flags == 0 ||108 (flags & ~XFS_QMOPT_QUOTALL)) {109 xfs_debug(mp, "%s: flags=%x m_qflags=%x",110 __func__, flags, mp->m_qflags);111 return -EINVAL;112 }113 114 if (flags & XFS_QMOPT_UQUOTA) {115 error = xfs_qm_scall_trunc_qfile(mp, XFS_DQTYPE_USER);116 if (error)117 return error;118 }119 if (flags & XFS_QMOPT_GQUOTA) {120 error = xfs_qm_scall_trunc_qfile(mp, XFS_DQTYPE_GROUP);121 if (error)122 return error;123 }124 if (flags & XFS_QMOPT_PQUOTA)125 error = xfs_qm_scall_trunc_qfile(mp, XFS_DQTYPE_PROJ);126 127 return error;128}129 130/*131 * Switch on (a given) quota enforcement for a filesystem. This takes132 * effect immediately.133 * (Switching on quota accounting must be done at mount time.)134 */135int136xfs_qm_scall_quotaon(137 xfs_mount_t *mp,138 uint flags)139{140 int error;141 uint qf;142 143 /*144 * Switching on quota accounting must be done at mount time,145 * only consider quota enforcement stuff here.146 */147 flags &= XFS_ALL_QUOTA_ENFD;148 149 if (flags == 0) {150 xfs_debug(mp, "%s: zero flags, m_qflags=%x",151 __func__, mp->m_qflags);152 return -EINVAL;153 }154 155 /*156 * Can't enforce without accounting. We check the superblock157 * qflags here instead of m_qflags because rootfs can have158 * quota acct on ondisk without m_qflags' knowing.159 */160 if (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) == 0 &&161 (flags & XFS_UQUOTA_ENFD)) ||162 ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) == 0 &&163 (flags & XFS_GQUOTA_ENFD)) ||164 ((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) == 0 &&165 (flags & XFS_PQUOTA_ENFD))) {166 xfs_debug(mp,167 "%s: Can't enforce without acct, flags=%x sbflags=%x",168 __func__, flags, mp->m_sb.sb_qflags);169 return -EINVAL;170 }171 /*172 * If everything's up to-date incore, then don't waste time.173 */174 if ((mp->m_qflags & flags) == flags)175 return -EEXIST;176 177 /*178 * Change sb_qflags on disk but not incore mp->qflags179 * if this is the root filesystem.180 */181 spin_lock(&mp->m_sb_lock);182 qf = mp->m_sb.sb_qflags;183 mp->m_sb.sb_qflags = qf | flags;184 spin_unlock(&mp->m_sb_lock);185 186 /*187 * There's nothing to change if it's the same.188 */189 if ((qf & flags) == flags)190 return -EEXIST;191 192 error = xfs_sync_sb(mp, false);193 if (error)194 return error;195 /*196 * If we aren't trying to switch on quota enforcement, we are done.197 */198 if (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) !=199 (mp->m_qflags & XFS_UQUOTA_ACCT)) ||200 ((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) !=201 (mp->m_qflags & XFS_PQUOTA_ACCT)) ||202 ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) !=203 (mp->m_qflags & XFS_GQUOTA_ACCT)))204 return 0;205 206 if (!XFS_IS_QUOTA_ON(mp))207 return -ESRCH;208 209 /*210 * Switch on quota enforcement in core.211 */212 mutex_lock(&mp->m_quotainfo->qi_quotaofflock);213 mp->m_qflags |= (flags & XFS_ALL_QUOTA_ENFD);214 mutex_unlock(&mp->m_quotainfo->qi_quotaofflock);215 216 return 0;217}218 219#define XFS_QC_MASK (QC_LIMIT_MASK | QC_TIMER_MASK)220 221/*222 * Adjust limits of this quota, and the defaults if passed in. Returns true223 * if the new limits made sense and were applied, false otherwise.224 */225static inline bool226xfs_setqlim_limits(227 struct xfs_mount *mp,228 struct xfs_dquot_res *res,229 struct xfs_quota_limits *qlim,230 xfs_qcnt_t hard,231 xfs_qcnt_t soft,232 const char *tag)233{234 /* The hard limit can't be less than the soft limit. */235 if (hard != 0 && hard < soft) {236 xfs_debug(mp, "%shard %lld < %ssoft %lld", tag, hard, tag,237 soft);238 return false;239 }240 241 res->hardlimit = hard;242 res->softlimit = soft;243 if (qlim) {244 qlim->hard = hard;245 qlim->soft = soft;246 }247 248 return true;249}250 251static inline void252xfs_setqlim_timer(253 struct xfs_mount *mp,254 struct xfs_dquot_res *res,255 struct xfs_quota_limits *qlim,256 s64 timer)257{258 if (qlim) {259 /* Set the length of the default grace period. */260 res->timer = xfs_dquot_set_grace_period(timer);261 qlim->time = res->timer;262 } else {263 /* Set the grace period expiration on a quota. */264 res->timer = xfs_dquot_set_timeout(mp, timer);265 }266}267 268/*269 * Adjust quota limits, and start/stop timers accordingly.270 */271int272xfs_qm_scall_setqlim(273 struct xfs_mount *mp,274 xfs_dqid_t id,275 xfs_dqtype_t type,276 struct qc_dqblk *newlim)277{278 struct xfs_quotainfo *q = mp->m_quotainfo;279 struct xfs_dquot *dqp;280 struct xfs_trans *tp;281 struct xfs_def_quota *defq;282 struct xfs_dquot_res *res;283 struct xfs_quota_limits *qlim;284 int error;285 xfs_qcnt_t hard, soft;286 287 if (newlim->d_fieldmask & ~XFS_QC_MASK)288 return -EINVAL;289 if ((newlim->d_fieldmask & XFS_QC_MASK) == 0)290 return 0;291 292 /*293 * Get the dquot (locked) before we start, as we need to do a294 * transaction to allocate it if it doesn't exist. Once we have the295 * dquot, unlock it so we can start the next transaction safely. We hold296 * a reference to the dquot, so it's safe to do this unlock/lock without297 * it being reclaimed in the mean time.298 */299 error = xfs_qm_dqget(mp, id, type, true, &dqp);300 if (error) {301 ASSERT(error != -ENOENT);302 return error;303 }304 305 defq = xfs_get_defquota(q, xfs_dquot_type(dqp));306 xfs_dqunlock(dqp);307 308 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_qm_setqlim, 0, 0, 0, &tp);309 if (error)310 goto out_rele;311 312 xfs_dqlock(dqp);313 xfs_trans_dqjoin(tp, dqp);314 315 /*316 * Update quota limits, warnings, and timers, and the defaults317 * if we're touching id == 0.318 *319 * Make sure that hardlimits are >= soft limits before changing.320 *321 * Update warnings counter(s) if requested.322 *323 * Timelimits for the super user set the relative time the other users324 * can be over quota for this file system. If it is zero a default is325 * used. Ditto for the default soft and hard limit values (already326 * done, above), and for warnings.327 *328 * For other IDs, userspace can bump out the grace period if over329 * the soft limit.330 */331 332 /* Blocks on the data device. */333 hard = (newlim->d_fieldmask & QC_SPC_HARD) ?334 (xfs_qcnt_t) XFS_B_TO_FSB(mp, newlim->d_spc_hardlimit) :335 dqp->q_blk.hardlimit;336 soft = (newlim->d_fieldmask & QC_SPC_SOFT) ?337 (xfs_qcnt_t) XFS_B_TO_FSB(mp, newlim->d_spc_softlimit) :338 dqp->q_blk.softlimit;339 res = &dqp->q_blk;340 qlim = id == 0 ? &defq->blk : NULL;341 342 if (xfs_setqlim_limits(mp, res, qlim, hard, soft, "blk"))343 xfs_dquot_set_prealloc_limits(dqp);344 if (newlim->d_fieldmask & QC_SPC_TIMER)345 xfs_setqlim_timer(mp, res, qlim, newlim->d_spc_timer);346 347 /* Blocks on the realtime device. */348 hard = (newlim->d_fieldmask & QC_RT_SPC_HARD) ?349 (xfs_qcnt_t) XFS_B_TO_FSB(mp, newlim->d_rt_spc_hardlimit) :350 dqp->q_rtb.hardlimit;351 soft = (newlim->d_fieldmask & QC_RT_SPC_SOFT) ?352 (xfs_qcnt_t) XFS_B_TO_FSB(mp, newlim->d_rt_spc_softlimit) :353 dqp->q_rtb.softlimit;354 res = &dqp->q_rtb;355 qlim = id == 0 ? &defq->rtb : NULL;356 357 xfs_setqlim_limits(mp, res, qlim, hard, soft, "rtb");358 if (newlim->d_fieldmask & QC_RT_SPC_TIMER)359 xfs_setqlim_timer(mp, res, qlim, newlim->d_rt_spc_timer);360 361 /* Inodes */362 hard = (newlim->d_fieldmask & QC_INO_HARD) ?363 (xfs_qcnt_t) newlim->d_ino_hardlimit :364 dqp->q_ino.hardlimit;365 soft = (newlim->d_fieldmask & QC_INO_SOFT) ?366 (xfs_qcnt_t) newlim->d_ino_softlimit :367 dqp->q_ino.softlimit;368 res = &dqp->q_ino;369 qlim = id == 0 ? &defq->ino : NULL;370 371 xfs_setqlim_limits(mp, res, qlim, hard, soft, "ino");372 if (newlim->d_fieldmask & QC_INO_TIMER)373 xfs_setqlim_timer(mp, res, qlim, newlim->d_ino_timer);374 375 if (id != 0) {376 /*377 * If the user is now over quota, start the timelimit.378 * The user will not be 'warned'.379 * Note that we keep the timers ticking, whether enforcement380 * is on or off. We don't really want to bother with iterating381 * over all ondisk dquots and turning the timers on/off.382 */383 xfs_qm_adjust_dqtimers(dqp);384 }385 dqp->q_flags |= XFS_DQFLAG_DIRTY;386 xfs_trans_log_dquot(tp, dqp);387 388 error = xfs_trans_commit(tp);389 390out_rele:391 xfs_qm_dqrele(dqp);392 return error;393}394 395/* Fill out the quota context. */396static void397xfs_qm_scall_getquota_fill_qc(398 struct xfs_mount *mp,399 xfs_dqtype_t type,400 const struct xfs_dquot *dqp,401 struct qc_dqblk *dst)402{403 memset(dst, 0, sizeof(*dst));404 dst->d_spc_hardlimit = XFS_FSB_TO_B(mp, dqp->q_blk.hardlimit);405 dst->d_spc_softlimit = XFS_FSB_TO_B(mp, dqp->q_blk.softlimit);406 dst->d_ino_hardlimit = dqp->q_ino.hardlimit;407 dst->d_ino_softlimit = dqp->q_ino.softlimit;408 dst->d_space = XFS_FSB_TO_B(mp, dqp->q_blk.reserved);409 dst->d_ino_count = dqp->q_ino.reserved;410 dst->d_spc_timer = dqp->q_blk.timer;411 dst->d_ino_timer = dqp->q_ino.timer;412 dst->d_ino_warns = 0;413 dst->d_spc_warns = 0;414 dst->d_rt_spc_hardlimit = XFS_FSB_TO_B(mp, dqp->q_rtb.hardlimit);415 dst->d_rt_spc_softlimit = XFS_FSB_TO_B(mp, dqp->q_rtb.softlimit);416 dst->d_rt_space = XFS_FSB_TO_B(mp, dqp->q_rtb.reserved);417 dst->d_rt_spc_timer = dqp->q_rtb.timer;418 dst->d_rt_spc_warns = 0;419 420 /*421 * Internally, we don't reset all the timers when quota enforcement422 * gets turned off. No need to confuse the user level code,423 * so return zeroes in that case.424 */425 if (!xfs_dquot_is_enforced(dqp)) {426 dst->d_spc_timer = 0;427 dst->d_ino_timer = 0;428 dst->d_rt_spc_timer = 0;429 }430 431#ifdef DEBUG432 if (xfs_dquot_is_enforced(dqp) && dqp->q_id != 0) {433 if ((dst->d_space > dst->d_spc_softlimit) &&434 (dst->d_spc_softlimit > 0)) {435 ASSERT(dst->d_spc_timer != 0);436 }437 if ((dst->d_ino_count > dqp->q_ino.softlimit) &&438 (dqp->q_ino.softlimit > 0)) {439 ASSERT(dst->d_ino_timer != 0);440 }441 }442#endif443}444 445/* Return the quota information for the dquot matching id. */446int447xfs_qm_scall_getquota(448 struct xfs_mount *mp,449 xfs_dqid_t id,450 xfs_dqtype_t type,451 struct qc_dqblk *dst)452{453 struct xfs_dquot *dqp;454 int error;455 456 /*457 * Expedite pending inodegc work at the start of a quota reporting458 * scan but don't block waiting for it to complete.459 */460 if (id == 0)461 xfs_inodegc_push(mp);462 463 /*464 * Try to get the dquot. We don't want it allocated on disk, so don't465 * set doalloc. If it doesn't exist, we'll get ENOENT back.466 */467 error = xfs_qm_dqget(mp, id, type, false, &dqp);468 if (error)469 return error;470 471 /*472 * If everything's NULL, this dquot doesn't quite exist as far as473 * our utility programs are concerned.474 */475 if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {476 error = -ENOENT;477 goto out_put;478 }479 480 xfs_qm_scall_getquota_fill_qc(mp, type, dqp, dst);481 482out_put:483 xfs_qm_dqput(dqp);484 return error;485}486 487/*488 * Return the quota information for the first initialized dquot whose id489 * is at least as high as id.490 */491int492xfs_qm_scall_getquota_next(493 struct xfs_mount *mp,494 xfs_dqid_t *id,495 xfs_dqtype_t type,496 struct qc_dqblk *dst)497{498 struct xfs_dquot *dqp;499 int error;500 501 /* Flush inodegc work at the start of a quota reporting scan. */502 if (*id == 0)503 xfs_inodegc_push(mp);504 505 error = xfs_qm_dqget_next(mp, *id, type, &dqp);506 if (error)507 return error;508 509 /* Fill in the ID we actually read from disk */510 *id = dqp->q_id;511 512 xfs_qm_scall_getquota_fill_qc(mp, type, dqp, dst);513 514 xfs_qm_dqput(dqp);515 return error;516}517