Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 103 insertions, 0 deletions

diff --git a/fs/ntfs/quota.c b/fs/ntfs/quota.c
new file mode 100644
index 0000000000..9160480222
--- /dev/null
+++ b/fs/ntfs/quota.c
@@ -0,0 +1,103 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * quota.c - NTFS kernel quota ($Quota) handling.  Part of the Linux-NTFS
+ *	     project.
+ *
+ * Copyright (c) 2004 Anton Altaparmakov
+ */
+
+#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+ * ntfs_mark_quotas_out_of_date - mark the quotas out of date on an ntfs volume
+ * @vol:	ntfs volume on which to mark the quotas out of date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+ * Mark the quotas out of date on the ntfs volume @vol and return 'true' on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+	/* If quotas are already marked out of date, no need to do anything.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+	 * pending deletes, no need to mark the quotas out of date.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 */