quota.c
3.64 KB
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/*
* quota.c - NTFS kernel quota ($Quota) handling. Part of the Linux-NTFS
* project.
*
* Copyright (c) 2004 Anton Altaparmakov
*
* This program/include file is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as published
* by the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program/include file is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (in the main directory of the Linux-NTFS
* distribution in the file COPYING); if not, write to the Free Software
* Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef NTFS_RW
#include "index.h"
#include "quota.h"
#include "debug.h"
#include "ntfs.h"
/**
* ntfs_mark_quotas_out_of_date - mark the quotas out of date on an ntfs volume
* @vol: ntfs volume on which to mark the quotas out of date
*
* Mark the quotas out of date on the ntfs volume @vol and return 'true' on
* success and 'false' on error.
*/
bool ntfs_mark_quotas_out_of_date(ntfs_volume *vol)
{
ntfs_index_context *ictx;
QUOTA_CONTROL_ENTRY *qce;
const le32 qid = QUOTA_DEFAULTS_ID;
int err;
ntfs_debug("Entering.");
if (NVolQuotaOutOfDate(vol))
goto done;
if (!vol->quota_ino || !vol->quota_q_ino) {
ntfs_error(vol->sb, "Quota inodes are not open.");
return false;
}
mutex_lock(&vol->quota_q_ino->i_mutex);
ictx = ntfs_index_ctx_get(NTFS_I(vol->quota_q_ino));
if (!ictx) {
ntfs_error(vol->sb, "Failed to get index context.");
goto err_out;
}
err = ntfs_index_lookup(&qid, sizeof(qid), ictx);
if (err) {
if (err == -ENOENT)
ntfs_error(vol->sb, "Quota defaults entry is not "
"present.");
else
ntfs_error(vol->sb, "Lookup of quota defaults entry "
"failed.");
goto err_out;
}
if (ictx->data_len < offsetof(QUOTA_CONTROL_ENTRY, sid)) {
ntfs_error(vol->sb, "Quota defaults entry size is invalid. "
"Run chkdsk.");
goto err_out;
}
qce = (QUOTA_CONTROL_ENTRY*)ictx->data;
if (le32_to_cpu(qce->version) != QUOTA_VERSION) {
ntfs_error(vol->sb, "Quota defaults entry version 0x%x is not "
"supported.", le32_to_cpu(qce->version));
goto err_out;
}
ntfs_debug("Quota defaults flags = 0x%x.", le32_to_cpu(qce->flags));
/* If quotas are already marked out of date, no need to do anything. */
if (qce->flags & QUOTA_FLAG_OUT_OF_DATE)
goto set_done;
/*
* If quota tracking is neither requested, nor enabled and there are no
* pending deletes, no need to mark the quotas out of date.
*/
if (!(qce->flags & (QUOTA_FLAG_TRACKING_ENABLED |
QUOTA_FLAG_TRACKING_REQUESTED |
QUOTA_FLAG_PENDING_DELETES)))
goto set_done;
/*
* Set the QUOTA_FLAG_OUT_OF_DATE bit thus marking quotas out of date.
* This is verified on WinXP to be sufficient to cause windows to
* rescan the volume on boot and update all quota entries.
*/
qce->flags |= QUOTA_FLAG_OUT_OF_DATE;
/* Ensure the modified flags are written to disk. */
ntfs_index_entry_flush_dcache_page(ictx);
ntfs_index_entry_mark_dirty(ictx);
set_done:
ntfs_index_ctx_put(ictx);
mutex_unlock(&vol->quota_q_ino->i_mutex);
/*
* We set the flag so we do not try to mark the quotas out of date
* again on remount.
*/
NVolSetQuotaOutOfDate(vol);
done:
ntfs_debug("Done.");
return true;
err_out:
if (ictx)
ntfs_index_ctx_put(ictx);
mutex_unlock(&vol->quota_q_ino->i_mutex);
return false;
}
#endif /* NTFS_RW */