ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/fs/xfs/libxfs/xfs_dquot_buf.c b/marvell/linux/fs/xfs/libxfs/xfs_dquot_buf.c
new file mode 100644
index 0000000..96747fe
--- /dev/null
+++ b/marvell/linux/fs/xfs/libxfs/xfs_dquot_buf.c
@@ -0,0 +1,289 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2000-2006 Silicon Graphics, Inc.
+ * Copyright (c) 2013 Red Hat, Inc.
+ * All Rights Reserved.
+ */
+#include "xfs.h"
+#include "xfs_fs.h"
+#include "xfs_shared.h"
+#include "xfs_format.h"
+#include "xfs_log_format.h"
+#include "xfs_trans_resv.h"
+#include "xfs_mount.h"
+#include "xfs_inode.h"
+#include "xfs_quota.h"
+#include "xfs_trans.h"
+#include "xfs_qm.h"
+#include "xfs_error.h"
+
+int
+xfs_calc_dquots_per_chunk(
+ unsigned int nbblks) /* basic block units */
+{
+ ASSERT(nbblks > 0);
+ return BBTOB(nbblks) / sizeof(xfs_dqblk_t);
+}
+
+/*
+ * Do some primitive error checking on ondisk dquot data structures.
+ *
+ * The xfs_dqblk structure /contains/ the xfs_disk_dquot structure;
+ * we verify them separately because at some points we have only the
+ * smaller xfs_disk_dquot structure available.
+ */
+
+xfs_failaddr_t
+xfs_dquot_verify(
+ struct xfs_mount *mp,
+ struct xfs_disk_dquot *ddq,
+ xfs_dqid_t id,
+ uint type) /* used only during quotacheck */
+{
+ /*
+ * We can encounter an uninitialized dquot buffer for 2 reasons:
+ * 1. If we crash while deleting the quotainode(s), and those blks got
+ * used for user data. This is because we take the path of regular
+ * file deletion; however, the size field of quotainodes is never
+ * updated, so all the tricks that we play in itruncate_finish
+ * don't quite matter.
+ *
+ * 2. We don't play the quota buffers when there's a quotaoff logitem.
+ * But the allocation will be replayed so we'll end up with an
+ * uninitialized quota block.
+ *
+ * This is all fine; things are still consistent, and we haven't lost
+ * any quota information. Just don't complain about bad dquot blks.
+ */
+ if (ddq->d_magic != cpu_to_be16(XFS_DQUOT_MAGIC))
+ return __this_address;
+ if (ddq->d_version != XFS_DQUOT_VERSION)
+ return __this_address;
+
+ if (type && ddq->d_flags != type)
+ return __this_address;
+ if (ddq->d_flags != XFS_DQ_USER &&
+ ddq->d_flags != XFS_DQ_PROJ &&
+ ddq->d_flags != XFS_DQ_GROUP)
+ return __this_address;
+
+ if (id != -1 && id != be32_to_cpu(ddq->d_id))
+ return __this_address;
+
+ if (!ddq->d_id)
+ return NULL;
+
+ if (ddq->d_blk_softlimit &&
+ be64_to_cpu(ddq->d_bcount) > be64_to_cpu(ddq->d_blk_softlimit) &&
+ !ddq->d_btimer && !ddq->d_btimer_high)
+ return __this_address;
+
+ if (ddq->d_ino_softlimit &&
+ be64_to_cpu(ddq->d_icount) > be64_to_cpu(ddq->d_ino_softlimit) &&
+ !ddq->d_itimer && !ddq->d_itimer_high)
+ return __this_address;
+
+ if (ddq->d_rtb_softlimit &&
+ be64_to_cpu(ddq->d_rtbcount) > be64_to_cpu(ddq->d_rtb_softlimit) &&
+ !ddq->d_rtbtimer && !ddq->d_rtbtimer_high)
+ return __this_address;
+
+ return NULL;
+}
+
+xfs_failaddr_t
+xfs_dqblk_verify(
+ struct xfs_mount *mp,
+ struct xfs_dqblk *dqb,
+ xfs_dqid_t id,
+ uint type) /* used only during quotacheck */
+{
+ if (xfs_sb_version_hascrc(&mp->m_sb) &&
+ !uuid_equal(&dqb->dd_uuid, &mp->m_sb.sb_meta_uuid))
+ return __this_address;
+
+ return xfs_dquot_verify(mp, &dqb->dd_diskdq, id, type);
+}
+
+/*
+ * Do some primitive error checking on ondisk dquot data structures.
+ */
+void
+xfs_dqblk_repair(
+ struct xfs_mount *mp,
+ struct xfs_dqblk *dqb,
+ xfs_dqid_t id,
+ uint type)
+{
+ /*
+ * Typically, a repair is only requested by quotacheck.
+ */
+ ASSERT(id != -1);
+ memset(dqb, 0, sizeof(xfs_dqblk_t));
+
+ dqb->dd_diskdq.d_magic = cpu_to_be16(XFS_DQUOT_MAGIC);
+ dqb->dd_diskdq.d_version = XFS_DQUOT_VERSION;
+ dqb->dd_diskdq.d_flags = type;
+ dqb->dd_diskdq.d_id = cpu_to_be32(id);
+
+ if (xfs_sb_version_hascrc(&mp->m_sb)) {
+ uuid_copy(&dqb->dd_uuid, &mp->m_sb.sb_meta_uuid);
+ xfs_update_cksum((char *)dqb, sizeof(struct xfs_dqblk),
+ XFS_DQUOT_CRC_OFF);
+ }
+}
+
+STATIC bool
+xfs_dquot_buf_verify_crc(
+ struct xfs_mount *mp,
+ struct xfs_buf *bp,
+ bool readahead)
+{
+ struct xfs_dqblk *d = (struct xfs_dqblk *)bp->b_addr;
+ int ndquots;
+ int i;
+
+ if (!xfs_sb_version_hascrc(&mp->m_sb))
+ return true;
+
+ /*
+ * if we are in log recovery, the quota subsystem has not been
+ * initialised so we have no quotainfo structure. In that case, we need
+ * to manually calculate the number of dquots in the buffer.
+ */
+ if (mp->m_quotainfo)
+ ndquots = mp->m_quotainfo->qi_dqperchunk;
+ else
+ ndquots = xfs_calc_dquots_per_chunk(bp->b_length);
+
+ for (i = 0; i < ndquots; i++, d++) {
+ if (!xfs_verify_cksum((char *)d, sizeof(struct xfs_dqblk),
+ XFS_DQUOT_CRC_OFF)) {
+ if (!readahead)
+ xfs_buf_verifier_error(bp, -EFSBADCRC, __func__,
+ d, sizeof(*d), __this_address);
+ return false;
+ }
+ }
+ return true;
+}
+
+STATIC xfs_failaddr_t
+xfs_dquot_buf_verify(
+ struct xfs_mount *mp,
+ struct xfs_buf *bp,
+ bool readahead)
+{
+ struct xfs_dqblk *dqb = bp->b_addr;
+ xfs_failaddr_t fa;
+ xfs_dqid_t id = 0;
+ int ndquots;
+ int i;
+
+ /*
+ * if we are in log recovery, the quota subsystem has not been
+ * initialised so we have no quotainfo structure. In that case, we need
+ * to manually calculate the number of dquots in the buffer.
+ */
+ if (mp->m_quotainfo)
+ ndquots = mp->m_quotainfo->qi_dqperchunk;
+ else
+ ndquots = xfs_calc_dquots_per_chunk(bp->b_length);
+
+ /*
+ * On the first read of the buffer, verify that each dquot is valid.
+ * We don't know what the id of the dquot is supposed to be, just that
+ * they should be increasing monotonically within the buffer. If the
+ * first id is corrupt, then it will fail on the second dquot in the
+ * buffer so corruptions could point to the wrong dquot in this case.
+ */
+ for (i = 0; i < ndquots; i++) {
+ struct xfs_disk_dquot *ddq;
+
+ ddq = &dqb[i].dd_diskdq;
+
+ if (i == 0)
+ id = be32_to_cpu(ddq->d_id);
+
+ fa = xfs_dqblk_verify(mp, &dqb[i], id + i, 0);
+ if (fa) {
+ if (!readahead)
+ xfs_buf_verifier_error(bp, -EFSCORRUPTED,
+ __func__, &dqb[i],
+ sizeof(struct xfs_dqblk), fa);
+ return fa;
+ }
+ }
+
+ return NULL;
+}
+
+static xfs_failaddr_t
+xfs_dquot_buf_verify_struct(
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = bp->b_mount;
+
+ return xfs_dquot_buf_verify(mp, bp, false);
+}
+
+static void
+xfs_dquot_buf_read_verify(
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = bp->b_mount;
+
+ if (!xfs_dquot_buf_verify_crc(mp, bp, false))
+ return;
+ xfs_dquot_buf_verify(mp, bp, false);
+}
+
+/*
+ * readahead errors are silent and simply leave the buffer as !done so a real
+ * read will then be run with the xfs_dquot_buf_ops verifier. See
+ * xfs_inode_buf_verify() for why we use EIO and ~XBF_DONE here rather than
+ * reporting the failure.
+ */
+static void
+xfs_dquot_buf_readahead_verify(
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = bp->b_mount;
+
+ if (!xfs_dquot_buf_verify_crc(mp, bp, true) ||
+ xfs_dquot_buf_verify(mp, bp, true) != NULL) {
+ xfs_buf_ioerror(bp, -EIO);
+ bp->b_flags &= ~XBF_DONE;
+ }
+}
+
+/*
+ * we don't calculate the CRC here as that is done when the dquot is flushed to
+ * the buffer after the update is done. This ensures that the dquot in the
+ * buffer always has an up-to-date CRC value.
+ */
+static void
+xfs_dquot_buf_write_verify(
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = bp->b_mount;
+
+ xfs_dquot_buf_verify(mp, bp, false);
+}
+
+const struct xfs_buf_ops xfs_dquot_buf_ops = {
+ .name = "xfs_dquot",
+ .magic16 = { cpu_to_be16(XFS_DQUOT_MAGIC),
+ cpu_to_be16(XFS_DQUOT_MAGIC) },
+ .verify_read = xfs_dquot_buf_read_verify,
+ .verify_write = xfs_dquot_buf_write_verify,
+ .verify_struct = xfs_dquot_buf_verify_struct,
+};
+
+const struct xfs_buf_ops xfs_dquot_buf_ra_ops = {
+ .name = "xfs_dquot_ra",
+ .magic16 = { cpu_to_be16(XFS_DQUOT_MAGIC),
+ cpu_to_be16(XFS_DQUOT_MAGIC) },
+ .verify_read = xfs_dquot_buf_readahead_verify,
+ .verify_write = xfs_dquot_buf_write_verify,
+};