104 lines
2.9 KiB
C
104 lines
2.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* quota.c - NTFS kernel quota ($Quota) handling. Part of the Linux-NTFS
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* project.
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*
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* Copyright (c) 2004 Anton Altaparmakov
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*/
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#ifdef NTFS_RW
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#include "index.h"
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#include "quota.h"
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#include "debug.h"
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#include "ntfs.h"
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/**
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* ntfs_mark_quotas_out_of_date - mark the quotas out of date on an ntfs volume
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* @vol: ntfs volume on which to mark the quotas out of date
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*
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* Mark the quotas out of date on the ntfs volume @vol and return 'true' on
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* success and 'false' on error.
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*/
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bool ntfs_mark_quotas_out_of_date(ntfs_volume *vol)
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{
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ntfs_index_context *ictx;
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QUOTA_CONTROL_ENTRY *qce;
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const le32 qid = QUOTA_DEFAULTS_ID;
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int err;
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ntfs_debug("Entering.");
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if (NVolQuotaOutOfDate(vol))
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goto done;
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if (!vol->quota_ino || !vol->quota_q_ino) {
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ntfs_error(vol->sb, "Quota inodes are not open.");
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return false;
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}
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inode_lock(vol->quota_q_ino);
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ictx = ntfs_index_ctx_get(NTFS_I(vol->quota_q_ino));
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if (!ictx) {
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ntfs_error(vol->sb, "Failed to get index context.");
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goto err_out;
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}
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err = ntfs_index_lookup(&qid, sizeof(qid), ictx);
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if (err) {
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if (err == -ENOENT)
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ntfs_error(vol->sb, "Quota defaults entry is not "
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"present.");
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else
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ntfs_error(vol->sb, "Lookup of quota defaults entry "
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"failed.");
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goto err_out;
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}
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if (ictx->data_len < offsetof(QUOTA_CONTROL_ENTRY, sid)) {
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ntfs_error(vol->sb, "Quota defaults entry size is invalid. "
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"Run chkdsk.");
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goto err_out;
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}
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qce = (QUOTA_CONTROL_ENTRY*)ictx->data;
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if (le32_to_cpu(qce->version) != QUOTA_VERSION) {
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ntfs_error(vol->sb, "Quota defaults entry version 0x%x is not "
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"supported.", le32_to_cpu(qce->version));
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goto err_out;
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}
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ntfs_debug("Quota defaults flags = 0x%x.", le32_to_cpu(qce->flags));
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/* If quotas are already marked out of date, no need to do anything. */
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if (qce->flags & QUOTA_FLAG_OUT_OF_DATE)
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goto set_done;
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/*
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* If quota tracking is neither requested, nor enabled and there are no
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* pending deletes, no need to mark the quotas out of date.
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*/
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if (!(qce->flags & (QUOTA_FLAG_TRACKING_ENABLED |
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QUOTA_FLAG_TRACKING_REQUESTED |
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QUOTA_FLAG_PENDING_DELETES)))
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goto set_done;
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/*
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* Set the QUOTA_FLAG_OUT_OF_DATE bit thus marking quotas out of date.
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* This is verified on WinXP to be sufficient to cause windows to
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* rescan the volume on boot and update all quota entries.
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*/
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qce->flags |= QUOTA_FLAG_OUT_OF_DATE;
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/* Ensure the modified flags are written to disk. */
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ntfs_index_entry_flush_dcache_page(ictx);
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ntfs_index_entry_mark_dirty(ictx);
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set_done:
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ntfs_index_ctx_put(ictx);
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inode_unlock(vol->quota_q_ino);
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/*
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* We set the flag so we do not try to mark the quotas out of date
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* again on remount.
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*/
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NVolSetQuotaOutOfDate(vol);
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done:
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ntfs_debug("Done.");
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return true;
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err_out:
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if (ictx)
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ntfs_index_ctx_put(ictx);
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inode_unlock(vol->quota_q_ino);
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return false;
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}
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#endif /* NTFS_RW */
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