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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /fs/ntfs/quota.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/ntfs/quota.c')
-rw-r--r--fs/ntfs/quota.c103
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+ * ntfs_mark_quotas_out_of_date - mark the quotas out of date on an ntfs volume
+ * @vol: ntfs volume on which to mark the quotas out of date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+ * Mark the quotas out of date on the ntfs volume @vol and return 'true' on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 */