From: Herbert Pötzl <herbert@13thfloor.at>
Previously, it was down the the filesystem to know whether it is
mounted read-only, and was of no interest to the VFS. We want
per-mount read-only.
Add an extra flag to the list of per-vfsmount flags for read-only, and
a macro to test it. Also, make sure the new flag is put in the right
place to make it to do_loopback. It is also by side effect passed to
do_remount and do_new_mount, it is of little discernable effect as the
underlying mount will be read-only.
Acked-by: Sam Vilain <sam.vilain@catalyst.net.nz>
--- fs/namespace.c | 2 ++ include/linux/mount.h | 3 +++ 2 files changed, 5 insertions(+), 0 deletions(-) diff --git a/fs/namespace.c b/fs/namespace.c index 1094e54..b12ea35 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1289,6 +1289,8 @@ long do_mount(char *dev_name, char *dir_ ((char *)data_page)[PAGE_SIZE - 1] = 0; /* Separate the per-mountpoint flags */ + if (flags & MS_RDONLY) + mnt_flags |= MNT_RDONLY; if (flags & MS_NOSUID) mnt_flags |= MNT_NOSUID; if (flags & MS_NODEV) diff --git a/include/linux/mount.h b/include/linux/mount.h index b7472ae..c485c2b 100644 --- a/include/linux/mount.h +++ b/include/linux/mount.h @@ -22,6 +22,9 @@ #define MNT_NOEXEC 0x04 #define MNT_NOATIME 0x08 #define MNT_NODIRATIME 0x10 +#define MNT_RDONLY 0x20 + +#define MNT_IS_RDONLY(m) ((m) && ((m)->mnt_flags & MNT_RDONLY)) #define MNT_SHARED 0x1000 /* if the vfsmount is a shared mount */ #define MNT_UNBINDABLE 0x2000 /* if the vfsmount is a unbindable mount */ _______________________________________________ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserverReceived on Mon Feb 27 05:43:52 2006