1 /* 2 * quota.c - NTFS kernel quota ($Quota) handling. Part of the Linux-NTFS 3 * project. 4 * 5 * Copyright (c) 2004 Anton Altaparmakov 6 * 7 * This program/include file is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License as published 9 * by the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program/include file is distributed in the hope that it will be 13 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty 14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program (in the main directory of the Linux-NTFS 19 * distribution in the file COPYING); if not, write to the Free Software 20 * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 */ 22 23 #ifdef NTFS_RW 24 25 #include "index.h" 26 #include "quota.h" 27 #include "debug.h" 28 #include "ntfs.h" 29 30 /** 31 * ntfs_mark_quotas_out_of_date - mark the quotas out of date on an ntfs volume 32 * @vol: ntfs volume on which to mark the quotas out of date 33 * 34 * Mark the quotas out of date on the ntfs volume @vol and return 'true' on 35 * success and 'false' on error. 36 */ 37 bool ntfs_mark_quotas_out_of_date(ntfs_volume *vol) 38 { 39 ntfs_index_context *ictx; 40 QUOTA_CONTROL_ENTRY *qce; 41 const le32 qid = QUOTA_DEFAULTS_ID; 42 int err; 43 44 ntfs_debug("Entering."); 45 if (NVolQuotaOutOfDate(vol)) 46 goto done; 47 if (!vol->quota_ino || !vol->quota_q_ino) { 48 ntfs_error(vol->sb, "Quota inodes are not open."); 49 return false; 50 } 51 mutex_lock(&vol->quota_q_ino->i_mutex); 52 ictx = ntfs_index_ctx_get(NTFS_I(vol->quota_q_ino)); 53 if (!ictx) { 54 ntfs_error(vol->sb, "Failed to get index context."); 55 goto err_out; 56 } 57 err = ntfs_index_lookup(&qid, sizeof(qid), ictx); 58 if (err) { 59 if (err == -ENOENT) 60 ntfs_error(vol->sb, "Quota defaults entry is not " 61 "present."); 62 else 63 ntfs_error(vol->sb, "Lookup of quota defaults entry " 64 "failed."); 65 goto err_out; 66 } 67 if (ictx->data_len < offsetof(QUOTA_CONTROL_ENTRY, sid)) { 68 ntfs_error(vol->sb, "Quota defaults entry size is invalid. " 69 "Run chkdsk."); 70 goto err_out; 71 } 72 qce = (QUOTA_CONTROL_ENTRY*)ictx->data; 73 if (le32_to_cpu(qce->version) != QUOTA_VERSION) { 74 ntfs_error(vol->sb, "Quota defaults entry version 0x%x is not " 75 "supported.", le32_to_cpu(qce->version)); 76 goto err_out; 77 } 78 ntfs_debug("Quota defaults flags = 0x%x.", le32_to_cpu(qce->flags)); 79 /* If quotas are already marked out of date, no need to do anything. */ 80 if (qce->flags & QUOTA_FLAG_OUT_OF_DATE) 81 goto set_done; 82 /* 83 * If quota tracking is neither requested, nor enabled and there are no 84 * pending deletes, no need to mark the quotas out of date. 85 */ 86 if (!(qce->flags & (QUOTA_FLAG_TRACKING_ENABLED | 87 QUOTA_FLAG_TRACKING_REQUESTED | 88 QUOTA_FLAG_PENDING_DELETES))) 89 goto set_done; 90 /* 91 * Set the QUOTA_FLAG_OUT_OF_DATE bit thus marking quotas out of date. 92 * This is verified on WinXP to be sufficient to cause windows to 93 * rescan the volume on boot and update all quota entries. 94 */ 95 qce->flags |= QUOTA_FLAG_OUT_OF_DATE; 96 /* Ensure the modified flags are written to disk. */ 97 ntfs_index_entry_flush_dcache_page(ictx); 98 ntfs_index_entry_mark_dirty(ictx); 99 set_done: 100 ntfs_index_ctx_put(ictx); 101 mutex_unlock(&vol->quota_q_ino->i_mutex); 102 /* 103 * We set the flag so we do not try to mark the quotas out of date 104 * again on remount. 105 */ 106 NVolSetQuotaOutOfDate(vol); 107 done: 108 ntfs_debug("Done."); 109 return true; 110 err_out: 111 if (ictx) 112 ntfs_index_ctx_put(ictx); 113 mutex_unlock(&vol->quota_q_ino->i_mutex); 114 return false; 115 } 116 117 #endif /* NTFS_RW */ 118