On Mon, Feb 08, 2021 at 08:11:14PM -0800, Darrick J. Wong wrote:
> From: Darrick J. Wong <djwong@xxxxxxxxxx>
>
> Upgrade existing V5 filesystems to support large timestamps up to 2486.
>
> Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
> ---
Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx>
> man/man8/xfs_admin.8 | 6 ++++++
> repair/globals.c | 1 +
> repair/globals.h | 1 +
> repair/phase1.c | 23 +++++++++++++++++++++++
> repair/xfs_repair.c | 11 +++++++++++
> 5 files changed, 42 insertions(+)
>
>
> diff --git a/man/man8/xfs_admin.8 b/man/man8/xfs_admin.8
> index da05171d..13d71643 100644
> --- a/man/man8/xfs_admin.8
> +++ b/man/man8/xfs_admin.8
> @@ -135,6 +135,12 @@ This reduces mount time by speeding up metadata space reservation calculations.
> The filesystem cannot be downgraded after this feature is enabled.
> Once enabled, the filesystem will not be writable by older kernels.
> This feature was added to Linux 5.10.
> +.TP 0.4i
> +.B bigtime
> +Upgrade a filesystem to support larger timestamps up to the year 2486.
> +The filesystem cannot be downgraded after this feature is enabled.
> +Once enabled, the filesystem will not be mountable by older kernels.
> +This feature was added to Linux 5.10.
> .RE
> .TP
> .BI \-U " uuid"
> diff --git a/repair/globals.c b/repair/globals.c
> index 89063b10..28f0b6a0 100644
> --- a/repair/globals.c
> +++ b/repair/globals.c
> @@ -52,6 +52,7 @@ int lazy_count; /* What to set if to if converting */
>
> bool add_needsrepair; /* forcibly set needsrepair while repairing */
> bool add_inobtcount; /* add inode btree counts to AGI */
> +bool add_bigtime; /* add support for timestamps up to 2486 */
>
> /* misc status variables */
>
> diff --git a/repair/globals.h b/repair/globals.h
> index a0051794..be784cf6 100644
> --- a/repair/globals.h
> +++ b/repair/globals.h
> @@ -94,6 +94,7 @@ extern int lazy_count; /* What to set if to if converting */
>
> extern bool add_needsrepair;
> extern bool add_inobtcount;
> +extern bool add_bigtime;
>
> /* misc status variables */
>
> diff --git a/repair/phase1.c b/repair/phase1.c
> index 96661c6b..89056215 100644
> --- a/repair/phase1.c
> +++ b/repair/phase1.c
> @@ -77,6 +77,27 @@ set_inobtcount(
> sb->sb_features_incompat |= XFS_SB_FEAT_INCOMPAT_NEEDSREPAIR;
> }
>
> +static void
> +set_bigtime(
> + struct xfs_sb *sb)
> +{
> + if (!xfs_sb_version_hascrc(sb)) {
> + printf(
> + _("Large timestamp feature only supported on V5 filesystems.\n"));
> + exit(0);
> + }
> +
> + if (xfs_sb_version_hasbigtime(sb)) {
> + printf(_("Filesystem already supports large timestamps.\n"));
> + return;
> + }
> +
> + printf(_("Adding large timestamp support to filesystem.\n"));
> + primary_sb_modified = 1;
> + sb->sb_features_incompat |= (XFS_SB_FEAT_INCOMPAT_NEEDSREPAIR |
> + XFS_SB_FEAT_INCOMPAT_BIGTIME);
> +}
> +
> /*
> * this has got to be big enough to hold 4 sectors
> */
> @@ -177,6 +198,8 @@ _("Cannot disable lazy-counters on V5 fs\n"));
> set_needsrepair(sb);
> if (add_inobtcount)
> set_inobtcount(sb);
> + if (add_bigtime)
> + set_bigtime(sb);
>
> /* shared_vn should be zero */
> if (sb->sb_shared_vn) {
> diff --git a/repair/xfs_repair.c b/repair/xfs_repair.c
> index 0ff2e2bc..60f97e8c 100644
> --- a/repair/xfs_repair.c
> +++ b/repair/xfs_repair.c
> @@ -69,6 +69,7 @@ enum c_opt_nums {
> CONVERT_LAZY_COUNT = 0,
> CONVERT_NEEDSREPAIR,
> CONVERT_INOBTCOUNT,
> + CONVERT_BIGTIME,
> C_MAX_OPTS,
> };
>
> @@ -76,6 +77,7 @@ static char *c_opts[] = {
> [CONVERT_LAZY_COUNT] = "lazycount",
> [CONVERT_NEEDSREPAIR] = "needsrepair",
> [CONVERT_INOBTCOUNT] = "inobtcount",
> + [CONVERT_BIGTIME] = "bigtime",
> [C_MAX_OPTS] = NULL,
> };
>
> @@ -327,6 +329,15 @@ process_args(int argc, char **argv)
> _("-c inobtcount only supports upgrades\n"));
> add_inobtcount = true;
> break;
> + case CONVERT_BIGTIME:
> + if (!val)
> + do_abort(
> + _("-c bigtime requires a parameter\n"));
> + if (strtol(val, NULL, 0) != 1)
> + do_abort(
> + _("-c bigtime only supports upgrades\n"));
> + add_bigtime = true;
> + break;
> default:
> unknown('c', val);
> break;
>
