disable some mediatekl custom warnings

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / xfs / xfs_dquot.c

diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c
index a41f8bf1da3788818131386f8ceb08516ffd1603..044e97a33c8d0a155f1ea026a20881f95dd95274 100644 (file)
--- a/fs/xfs/xfs_dquot.c
+++ b/fs/xfs/xfs_dquot.c
@@ -249,8 +249,11 @@ xfs_qm_init_dquot_blk(
                d->dd_diskdq.d_version = XFS_DQUOT_VERSION;
                d->dd_diskdq.d_id = cpu_to_be32(curid);
                d->dd_diskdq.d_flags = type;
-               if (xfs_sb_version_hascrc(&mp->m_sb))
+               if (xfs_sb_version_hascrc(&mp->m_sb)) {
                        uuid_copy(&d->dd_uuid, &mp->m_sb.sb_uuid);
+                       xfs_update_cksum((char *)d, sizeof(struct xfs_dqblk),
+                                        XFS_DQUOT_CRC_OFF);
+               }
        }
 
        xfs_trans_dquot_buf(tp, bp,
@@ -286,23 +289,6 @@ xfs_dquot_set_prealloc_limits(struct xfs_dquot *dqp)
        dqp->q_low_space[XFS_QLOWSP_5_PCNT] = space * 5;
 }
 
-STATIC void
-xfs_dquot_buf_calc_crc(
-       struct xfs_mount        *mp,
-       struct xfs_buf          *bp)
-{
-       struct xfs_dqblk        *d = (struct xfs_dqblk *)bp->b_addr;
-       int                     i;
-
-       if (!xfs_sb_version_hascrc(&mp->m_sb))
-               return;
-
-       for (i = 0; i < mp->m_quotainfo->qi_dqperchunk; i++, d++) {
-               xfs_update_cksum((char *)d, sizeof(struct xfs_dqblk),
-                                offsetof(struct xfs_dqblk, dd_crc));
-       }
-}
-
 STATIC bool
 xfs_dquot_buf_verify_crc(
        struct xfs_mount        *mp,
@@ -328,12 +314,11 @@ xfs_dquot_buf_verify_crc(
 
        for (i = 0; i < ndquots; i++, d++) {
                if (!xfs_verify_cksum((char *)d, sizeof(struct xfs_dqblk),
-                                offsetof(struct xfs_dqblk, dd_crc)))
+                                XFS_DQUOT_CRC_OFF))
                        return false;
                if (!uuid_equal(&d->dd_uuid, &mp->m_sb.sb_uuid))
                        return false;
        }
-
        return true;
 }
 
@@ -393,6 +378,11 @@ xfs_dquot_buf_read_verify(
        }
 }
 
+/*
+ * 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.
+ */
 void
 xfs_dquot_buf_write_verify(
        struct xfs_buf  *bp)
@@ -404,7 +394,6 @@ xfs_dquot_buf_write_verify(
                xfs_buf_ioerror(bp, EFSCORRUPTED);
                return;
        }
-       xfs_dquot_buf_calc_crc(mp, bp);
 }
 
 const struct xfs_buf_ops xfs_dquot_buf_ops = {
@@ -1151,11 +1140,17 @@ xfs_qm_dqflush(
         * copy the lsn into the on-disk dquot now while we have the in memory
         * dquot here. This can't be done later in the write verifier as we
         * can't get access to the log item at that point in time.
+        *
+        * We also calculate the CRC here so that the on-disk dquot in the
+        * buffer always has a valid CRC. This ensures there is no possibility
+        * of a dquot without an up-to-date CRC getting to disk.
         */
        if (xfs_sb_version_hascrc(&mp->m_sb)) {
                struct xfs_dqblk *dqb = (struct xfs_dqblk *)ddqp;
 
                dqb->dd_lsn = cpu_to_be64(dqp->q_logitem.qli_item.li_lsn);
+               xfs_update_cksum((char *)dqb, sizeof(struct xfs_dqblk),
+                                XFS_DQUOT_CRC_OFF);
        }
 
        /*