From: Chandan Babu R <chandan.babu@xxxxxxxxxx>
This commit adds support to xfs_repair to allow upgrading an existing
filesystem to support per-inode large extent counters.
Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Signed-off-by: Chandan Babu R <chandan.babu@xxxxxxxxxx>
Signed-off-by: Dave Chinner <david@xxxxxxxxxxxxx>
---
man/man8/xfs_admin.8 | 7 +++++++
repair/globals.c | 1 +
repair/globals.h | 1 +
repair/phase2.c | 24 ++++++++++++++++++++++++
repair/xfs_repair.c | 11 +++++++++++
5 files changed, 44 insertions(+)
diff --git a/man/man8/xfs_admin.8 b/man/man8/xfs_admin.8
index ad28e0f6..4794d677 100644
--- a/man/man8/xfs_admin.8
+++ b/man/man8/xfs_admin.8
@@ -149,6 +149,13 @@ 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.
+.TP 0.4i
+.B nrext64
+Upgrade a filesystem to support large per-inode extent counters. The maximum
+data fork extent count will be 2^48 - 1, while the maximum attribute fork
+extent count will be 2^32 - 1. 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 5.19.
.RE
.TP
.BI \-U " uuid"
diff --git a/repair/globals.c b/repair/globals.c
index f8d4f1e4..c4084985 100644
--- a/repair/globals.c
+++ b/repair/globals.c
@@ -51,6 +51,7 @@ int lazy_count; /* What to set if to if converting */
bool features_changed; /* did we change superblock feature bits? */
bool add_inobtcount; /* add inode btree counts to AGI */
bool add_bigtime; /* add support for timestamps up to 2486 */
+bool add_nrext64;
/* misc status variables */
diff --git a/repair/globals.h b/repair/globals.h
index 0f98bd2b..b65e4a2d 100644
--- a/repair/globals.h
+++ b/repair/globals.h
@@ -92,6 +92,7 @@ extern int lazy_count; /* What to set if to if converting */
extern bool features_changed; /* did we change superblock feature bits? */
extern bool add_inobtcount; /* add inode btree counts to AGI */
extern bool add_bigtime; /* add support for timestamps up to 2486 */
+extern bool add_nrext64;
/* misc status variables */
diff --git a/repair/phase2.c b/repair/phase2.c
index a0fd1e9c..51567b19 100644
--- a/repair/phase2.c
+++ b/repair/phase2.c
@@ -181,6 +181,28 @@ set_bigtime(
return true;
}
+static bool
+set_nrext64(
+ struct xfs_mount *mp,
+ struct xfs_sb *new_sb)
+{
+ if (!xfs_has_crc(mp)) {
+ printf(
+ _("Nrext64 only supported on V5 filesystems.\n"));
+ exit(0);
+ }
+
+ if (xfs_has_large_extent_counts(mp)) {
+ printf(_("Filesystem already supports nrext64.\n"));
+ exit(0);
+ }
+
+ printf(_("Adding nrext64 to filesystem.\n"));
+ new_sb->sb_features_incompat |= XFS_SB_FEAT_INCOMPAT_NREXT64;
+ new_sb->sb_features_incompat |= XFS_SB_FEAT_INCOMPAT_NEEDSREPAIR;
+ return true;
+}
+
struct check_state {
struct xfs_sb sb;
uint64_t features;
@@ -384,6 +406,8 @@ upgrade_filesystem(
dirty |= set_inobtcount(mp, &new_sb);
if (add_bigtime)
dirty |= set_bigtime(mp, &new_sb);
+ if (add_nrext64)
+ dirty |= set_nrext64(mp, &new_sb);
if (!dirty)
return;
diff --git a/repair/xfs_repair.c b/repair/xfs_repair.c
index d08b0cec..c94671d8 100644
--- a/repair/xfs_repair.c
+++ b/repair/xfs_repair.c
@@ -67,6 +67,7 @@ enum c_opt_nums {
CONVERT_LAZY_COUNT = 0,
CONVERT_INOBTCOUNT,
CONVERT_BIGTIME,
+ CONVERT_NREXT64,
C_MAX_OPTS,
};
@@ -74,6 +75,7 @@ static char *c_opts[] = {
[CONVERT_LAZY_COUNT] = "lazycount",
[CONVERT_INOBTCOUNT] = "inobtcount",
[CONVERT_BIGTIME] = "bigtime",
+ [CONVERT_NREXT64] = "nrext64",
[C_MAX_OPTS] = NULL,
};
@@ -324,6 +326,15 @@ process_args(int argc, char **argv)
_("-c bigtime only supports upgrades\n"));
add_bigtime = true;
break;
+ case CONVERT_NREXT64:
+ if (!val)
+ do_abort(
+ _("-c nrext64 requires a parameter\n"));
+ if (strtol(val, NULL, 0) != 1)
+ do_abort(
+ _("-c nrext64 only supports upgrades\n"));
+ add_nrext64 = true;
+ break;
default:
unknown('c', val);
break;
