mirror of
https://github.com/torvalds/linux.git
synced 2024-11-24 05:02:12 +00:00
5955102c99
parallel to mutex_{lock,unlock,trylock,is_locked,lock_nested},
inode_foo(inode) being mutex_foo(&inode->i_mutex).
Please, use those for access to ->i_mutex; over the coming cycle
->i_mutex will become rwsem, with ->lookup() done with it held
only shared.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
118 lines
3.6 KiB
C
118 lines
3.6 KiB
C
/*
|
|
* 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* ntfs_mark_quotas_out_of_date - mark the quotas out of date on an ntfs volume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* @vol: ntfs volume on which to mark the quotas out of date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* Mark the quotas out of date on the ntfs volume @vol and return 'true' on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;
|
|
}
|
|
inode_lock(vol->quota_q_ino);
|
|
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);
|
|
inode_unlock(vol->quota_q_ino);
|
|
/*
|
|
* 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);
|
|
inode_unlock(vol->quota_q_ino);
|
|
return false;
|
|
}
|
|
|
|
#endif /* NTFS_RW */
|