[src/trunk]: src/sbin/tunefs Refresh the superblock in memory if changing a m...

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/d0231330d88b
branches:  trunk
changeset: 930598:d0231330d88b
user:      christos <christos%NetBSD.org@localhost>
date:      Thu Apr 09 14:44:38 2020 +0000

description:
Refresh the superblock in memory if changing a mounted partition.

diffstat:

 sbin/tunefs/tunefs.c |  22 +++++++++++++++++++---
 1 files changed, 19 insertions(+), 3 deletions(-)

diffs (70 lines):

diff -r 0d0825dad0cd -r d0231330d88b sbin/tunefs/tunefs.c
--- a/sbin/tunefs/tunefs.c      Thu Apr 09 14:39:10 2020 +0000
+++ b/sbin/tunefs/tunefs.c      Thu Apr 09 14:44:38 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: tunefs.c,v 1.50 2019/04/12 01:14:37 pgoyette Exp $     */
+/*     $NetBSD: tunefs.c,v 1.51 2020/04/09 14:44:38 christos Exp $     */
 
 /*
  * Copyright (c) 1983, 1993
@@ -39,7 +39,7 @@
 #if 0
 static char sccsid[] = "@(#)tunefs.c   8.3 (Berkeley) 5/3/95";
 #else
-__RCSID("$NetBSD: tunefs.c,v 1.50 2019/04/12 01:14:37 pgoyette Exp $");
+__RCSID("$NetBSD: tunefs.c,v 1.51 2020/04/09 14:44:38 christos Exp $");
 #endif
 #endif /* not lint */
 
@@ -47,10 +47,12 @@
  * tunefs: change layout parameters to an existing file system.
  */
 #include <sys/param.h>
+#include <sys/statvfs.h>
 
 #include <ufs/ffs/fs.h>
 #include <ufs/ffs/ffs_extern.h>
 #include <ufs/ufs/ufs_wapbl.h>
+#include <ufs/ufs/ufsmount.h>
 #include <ufs/ufs/quota2.h>
 
 #include <machine/bswap.h>
@@ -103,9 +105,10 @@
        const char      *special, *chg[2];
        char            device[MAXPATHLEN];
        int             maxbpg, minfree, optim, secsize;
-       int             avgfilesize, avgfpdir;
+       int             avgfilesize, avgfpdir, active;
        long long       logfilesize;
        int             secshift, fsbtodb;
+       struct statvfs  sfs;
 
        Aflag = Fflag = Nflag = 0;
        maxbpg = minfree = optim = secsize = -1;
@@ -203,6 +206,7 @@
                fi = openpartition(special, openflags, device, sizeof(device));
                special = device;
        }
+       active = fstatvfs(fi, &sfs) != -1;
        if (fi == -1)
                err(1, "%s", special);
        getsb(&sblock, special);
@@ -365,6 +369,18 @@
        /* write superblock to original coordinates (use old dev_bsize!) */
        bwrite(sblockloc, buf.data, SBLOCKSIZE, special);
 
+       if (active) {
+               struct ufs_args args;
+               args.fspec = sfs.f_mntfromname;
+               if (mount(MOUNT_FFS, sfs.f_mntonname, sfs.f_flag | MNT_UPDATE,
+                    &args, sizeof args) == -1)
+                        warn("mount");
+               else
+                       printf("%s: mount of %s on %s updated\n",
+                           getprogname(), sfs.f_mntfromname, sfs.f_mntonname);
+       }
+
+
        /* correct dev_bsize from possibly changed superblock data */
        dev_bsize = sblock.fs_fsize / FFS_FSBTODB(&sblock, 1);