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| 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| 31 | * ntfs_mark_quotas_out_of_date - mark the quotas out of date on an ntfs volume |
| 32 | * @vol: ntfs volume on which to mark the quotas out of date |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| 34 | * Mark the quotas out of date on the ntfs volume @vol and return 'true' on |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 |
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