On 12/7/15 12:06 AM, Qu Wenruo wrote: > Introduce a new mount option "nologreplay" to co-operate with "ro" mount > option to get real readonly mount, like "norecovery" in ext* and xfs. > > Since the new parse_options() need to check new flags at remount time, > so add a new parameter for parse_options(). > > Signed-off-by: Qu Wenruo <quwenruo@xxxxxxxxxxxxxx> > --- > Documentation/filesystems/btrfs.txt | 5 +++++ > fs/btrfs/ctree.h | 4 +++- > fs/btrfs/disk-io.c | 7 ++++--- > fs/btrfs/super.c | 20 +++++++++++++++++--- > 4 files changed, 29 insertions(+), 7 deletions(-) > > diff --git a/Documentation/filesystems/btrfs.txt b/Documentation/filesystems/btrfs.txt > index c772b47..ac4ed68 100644 > --- a/Documentation/filesystems/btrfs.txt > +++ b/Documentation/filesystems/btrfs.txt > @@ -168,6 +168,11 @@ Options with (*) are default options and will not show in the mount options. > notreelog > Enable/disable the tree logging used for fsync and O_SYNC writes. > > + nologreplay > + Disable the log tree replay at mount time for real read-only mount. > + Must be use with "ro" mount option and can't be disabled by mount > + option. This documentation is not clear to me - "can't be disabled by mount option?" I think you mean to talk about remount here? Perhaps something like: "... Must be used with 'ro' mount option. A filesystem mounted with the 'nologreplay' option cannot transition to a read-write mount via remount,rw - the filesystem must be unmounted and remounted if read-write access is desired." Thanks, -Eric -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
