On Di, 21.05.24 19:27, Qu Wenruo (wqu@xxxxxxxx) wrote: thank you! lgtm. > Although 'norecovery' mount option is marked deprecated for a long time > and a warning message is introduced during the deprecation window, it's > still actively utilized by several projects that need a safely way to > mount a btrfs without any writes. > > Furthermore this 'norecovery' mount option is supported by most major > filesystems, which makes it harder to validate our motivation. > > This patch would re-introduce the 'norecovery' mount option, and output > a message to recommend 'rescue=nologreplay' option. > > Link: https://lore.kernel.org/linux-btrfs/ZkxZT0J-z0GYvfy8@gardel-login/#t > Link: https://github.com/systemd/systemd/pull/32892 > Link: https://bugzilla.suse.com/show_bug.cgi?id=1222429 > Reported-by: Lennart Poettering <lennart@xxxxxxxxxxxxxx> > Reported-by: Jiri Slaby <jslaby@xxxxxxxx> > Fixes: a1912f712188 ("btrfs: remove code for inode_cache and recovery mount options") > Cc: stable@xxxxxxxxxxxxxxx # 6.8+ > Signed-off-by: Qu Wenruo <wqu@xxxxxxxx> > --- > fs/btrfs/super.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c > index 2dbc930a20f7..f05cce7c8b8d 100644 > --- a/fs/btrfs/super.c > +++ b/fs/btrfs/super.c > @@ -119,6 +119,7 @@ enum { > Opt_thread_pool, > Opt_treelog, > Opt_user_subvol_rm_allowed, > + Opt_norecovery, > > /* Rescue options */ > Opt_rescue, > @@ -245,6 +246,8 @@ static const struct fs_parameter_spec btrfs_fs_parameters[] = { > __fsparam(NULL, "nologreplay", Opt_nologreplay, fs_param_deprecated, NULL), > /* Deprecated, with alias rescue=usebackuproot */ > __fsparam(NULL, "usebackuproot", Opt_usebackuproot, fs_param_deprecated, NULL), > + /* For compatibility only, alias for "rescue=nologreplay". */ > + fsparam_flag("norecovery", Opt_norecovery), > > /* Debugging options. */ > fsparam_flag_no("enospc_debug", Opt_enospc_debug), > @@ -438,6 +441,11 @@ static int btrfs_parse_param(struct fs_context *fc, struct fs_parameter *param) > "'nologreplay' is deprecated, use 'rescue=nologreplay' instead"); > btrfs_set_opt(ctx->mount_opt, NOLOGREPLAY); > break; > + case Opt_norecovery: > + btrfs_info(NULL, > +"'norecovery' is for compatibility only, recommended to use 'rescue=nologreplay'"); > + btrfs_set_opt(ctx->mount_opt, NOLOGREPLAY); > + break; > case Opt_flushoncommit: > if (result.negated) > btrfs_clear_opt(ctx->mount_opt, FLUSHONCOMMIT); > -- > 2.45.1 > > Lennart -- Lennart Poettering, Berlin
