This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / fs / ntfs / quota.c

diff --git a/fs/ntfs/quota.c b/fs/ntfs/quota.c
new file mode 100644 (file)
index 0000000..d66ca9e
--- /dev/null
+++ b/fs/ntfs/quota.c
@@ -0,0 +1,115 @@
+/*
+ * 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 "ntfs.h"
+#include "index.h"
+#include "quota.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+ * ntfs_mark_quotas_out_of_date - mark the quotas out of date on an ntfs volume
+ * @vol:       ntfs volume on which to mark the quotas out of date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+ * Mark the quotas out of date on the ntfs volume @vol and return TRUE on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 u32 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;
+       }
+       down(&vol->quota_q_ino->i_sem);
+       ictx = ntfs_index_ctx_get(NTFS_I(vol->quota_q_ino));
+       if (!ictx) {
+               ntfs_error(vol->sb, "Failed to get index context.");
+               return FALSE;
+       }
+       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);
+       up(&vol->quota_q_ino->i_sem);
+       /*
+        * 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:
+       ntfs_index_ctx_put(ictx);
+       up(&vol->quota_q_ino->i_sem);
+       return FALSE;
+}
+
+#endif /* NTFS_RW */