LU-8900 snapshot: simulate readonly device

[fs/lustre-release.git] / lustre / osd-ldiskfs / osd_handler.c

diff --git a/lustre/osd-ldiskfs/osd_handler.c b/lustre/osd-ldiskfs/osd_handler.c
index 28f5e37..c9a9ff5 100644 (file)
--- a/lustre/osd-ldiskfs/osd_handler.c
+++ b/lustre/osd-ldiskfs/osd_handler.c
@@ -1604,6 +1604,14 @@ static struct thandle *osd_trans_create(const struct lu_env *env,
        struct thandle          *th;
        ENTRY;
 
+       if (d->dd_rdonly) {
+               CERROR("%s: someone try to start transaction under "
+                      "readonly mode, should be disabled.\n",
+                      osd_name(osd_dt_dev(d)));
+               dump_stack();
+               RETURN(ERR_PTR(-EROFS));
+       }
+
        /* on pending IO in this thread should left from prev. request */
        LASSERT(atomic_read(&iobuf->dr_numreqs) == 0);
 
@@ -6868,16 +6876,30 @@ static int osd_mount(const struct lu_env *env,
                       "greater than 512TB and can cause data corruption. "
                       "Use \"force_over_512tb\" mount option to override.\n",
                       name, dev);
-               GOTO(out, rc = -EINVAL);
+               GOTO(out_mnt, rc = -EINVAL);
        }
 
+       if (lmd_flags & LMD_FLG_DEV_RDONLY) {
 #ifdef HAVE_DEV_SET_RDONLY
-       if (dev_check_rdonly(o->od_mnt->mnt_sb->s_bdev)) {
-               CERROR("%s: underlying device %s is marked as read-only. "
-                      "Setup failed\n", name, dev);
-               GOTO(out_mnt, rc = -EROFS);
-       }
+               dev_set_rdonly(osd_sb(o)->s_bdev);
+               o->od_dt_dev.dd_rdonly = 1;
+               LCONSOLE_WARN("%s: set dev_rdonly on this device\n", name);
+#else
+               LCONSOLE_WARN("%s: not support dev_rdonly on this device",
+                             name);
+
+               GOTO(out_mnt, rc = -EOPNOTSUPP);
 #endif
+       } else {
+#ifdef HAVE_DEV_SET_RDONLY
+               if (dev_check_rdonly(osd_sb(o)->s_bdev)) {
+                       CERROR("%s: underlying device %s is marked as "
+                              "read-only. Setup failed\n", name, dev);
+
+                       GOTO(out_mnt, rc = -EROFS);
+               }
+#endif
+       }
 
        if (!LDISKFS_HAS_COMPAT_FEATURE(o->od_mnt->mnt_sb,
                                        LDISKFS_FEATURE_COMPAT_HAS_JOURNAL)) {