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D41603.1791105898.diff
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diff --git a/sbin/mount/mntopts.h b/sbin/mount/mntopts.h
--- a/sbin/mount/mntopts.h
+++ b/sbin/mount/mntopts.h
@@ -58,6 +58,7 @@
#define MOPT_NFS4ACLS { "nfsv4acls", 0, MNT_NFS4ACLS, 0 }
#define MOPT_AUTOMOUNTED { "automounted",0, MNT_AUTOMOUNTED, 0 }
#define MOPT_UNTRUSTED { "untrusted", 0, MNT_UNTRUSTED, 0 }
+#define MOPT_IGNORE { "ignore", 0, MNT_IGNORE, 0 }
/* Control flags. */
#define MOPT_FORCE { "force", 0, MNT_FORCE, 0 }
diff --git a/sbin/mount/mount.8 b/sbin/mount/mount.8
--- a/sbin/mount/mount.8
+++ b/sbin/mount/mount.8
@@ -375,6 +375,11 @@
This option is intended to be used when mounting file systems
from untrusted media such as USB memory sticks or other
externally-provided media.
+.It Cm ignore
+Information about the filesystem is not displayed by default by
+.Xr df 1
+and
+.Nm .
.El
.Pp
Any additional options specific to a file system type that is not
diff --git a/sys/kern/vfs_mount.c b/sys/kern/vfs_mount.c
--- a/sys/kern/vfs_mount.c
+++ b/sys/kern/vfs_mount.c
@@ -972,6 +972,12 @@
} else if (strcmp(opt->name, "noemptydir") == 0) {
fsflags &= ~MNT_EMPTYDIR;
do_freeopt = 1;
+ } else if (strcmp(opt->name, "ignore") == 0) {
+ fsflags |= MNT_IGNORE;
+ do_freeopt = 1;
+ } else if (strcmp(opt->name, "noignore") == 0) {
+ fsflags &= ~MNT_IGNORE;
+ do_freeopt = 1;
}
if (do_freeopt)
vfs_freeopt(optlist, opt);
diff --git a/sys/sys/mount.h b/sys/sys/mount.h
--- a/sys/sys/mount.h
+++ b/sys/sys/mount.h
@@ -362,6 +362,7 @@
{ MNT_RELOAD, "reload" }, \
{ MNT_FORCE, "force" }, \
{ MNT_SNAPSHOT, "snapshot" }, \
+ { MNT_IGNORE, "ignore" }, \
{ 0, NULL }
#endif

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