[PATCH 15/43] xfs: define the zoned on-disk format

Christoph Hellwig
2024-12-11T08:57:18Z

Zone file systems reuse the basic RT group enabled XFS file system
structure to support a mode where each RT group is always written from
start to end and then reset for reuse (after moving out any remaining
data). There are few minor but important changes, which are indicated
by a new incompat flag:

1) there are no bitmap and summary inodes, and thus the sb_rbmblocks
superblock field must be cleared to zero

2) there is a new superblock field that specifies the start of an
internal RT section. This allows supporting SMR HDDs that have random
writable space at the beginning which is used for the XFS data device
(which really is the metadata device for this configuration), directly
followed by a RT device on the same block device. While something
similar could be achieved using dm-linear just having a single device
directly consumed by XFS makes handling the file systems a lot easier.

3) Another superblock field that tracks the amount of reserved space (or
overprovisioning) that is never used for user capacity, but allows GC
to run more smoothly.

4) an overlay of the cowextsizse field for the rtrmap inode so that we
can persistently track the total amount of bytes currently used in
a RT group. There is no data structure other than the rmap that
tracks used space in an RT group, and this counter is used to decide
when a RT group has been entirely emptied, and to select one that
is relatively empty if garbage collection needs to be performed.
While this counter could be tracked entirely in memory and rebuilt
from the rmap at mount time, that would lead to very long mount times
with the large number of RT groups implied by the number of hardware
zones especially on SMR hard drives with 256MB zone sizes.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
fs/xfs/libxfs/xfs_format.h | 15 ++++++++++---
fs/xfs/libxfs/xfs_inode_buf.c | 18 +++++++++++-----
fs/xfs/libxfs/xfs_inode_util.c | 1 +
fs/xfs/libxfs/xfs_log_format.h | 7 ++++++-
fs/xfs/libxfs/xfs_ondisk.h | 6 ++++--
fs/xfs/libxfs/xfs_rtbitmap.c | 11 ++++++++++
fs/xfs/libxfs/xfs_rtgroup.c | 37 ++++++++++++++++++++-------------
fs/xfs/libxfs/xfs_sb.c | 35 ++++++++++++++++++++++++++++---
fs/xfs/scrub/agheader.c | 2 ++
fs/xfs/scrub/inode.c | 7 +++++++
fs/xfs/scrub/inode_repair.c | 4 +++-
fs/xfs/scrub/scrub.c | 2 ++
fs/xfs/xfs_fsmap.c | 6 +++++-
fs/xfs/xfs_inode.c | 3 ++-
fs/xfs/xfs_inode.h | 12 ++++++++++-
fs/xfs/xfs_inode_item.c | 1 +
fs/xfs/xfs_inode_item_recover.c | 1 +
fs/xfs/xfs_iomap.c | 1 +
fs/xfs/xfs_message.c | 4 ++++
fs/xfs/xfs_message.h | 1 +
fs/xfs/xfs_mount.h | 13 +++++++++++-
fs/xfs/xfs_rtalloc.c | 2 ++
fs/xfs/xfs_super.c | 11 +++++++++-
23 files changed, 165 insertions(+), 35 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
index b1007fb661ba..12979496f30a 100644
--- a/fs/xfs/libxfs/xfs_format.h
+++ b/fs/xfs/libxfs/xfs_format.h
@@ -178,9 +178,10 @@ typedef struct xfs_sb {

xfs_rgnumber_t sb_rgcount; /* number of realtime groups */
xfs_rtxlen_t sb_rgextents; /* size of a realtime group in rtx */
-
uint8_t sb_rgblklog; /* rt group number shift */
uint8_t sb_pad[7]; /* zeroes */
+ xfs_fsblock_t sb_rtstart; /* start of internal RT section (FSB) */
+ xfs_filblks_t sb_rtreserved; /* reserved (zoned) RT blocks */

/* must be padded to 64 bit alignment */
} xfs_sb_t;
@@ -270,9 +271,10 @@ struct xfs_dsb {
__be64 sb_metadirino; /* metadata directory tree root */
__be32 sb_rgcount; /* # of realtime groups */
__be32 sb_rgextents; /* size of rtgroup in rtx */
-
__u8 sb_rgblklog; /* rt group number shift */
__u8 sb_pad[7]; /* zeroes */
+ __be64 sb_rtstart; /* start of internal RT section (FSB) */
+ __be64 sb_rtreserved; /* reserved (zoned) RT blocks */

/*
* The size of this structure must be padded to 64 bit alignment.
@@ -395,6 +397,8 @@ xfs_sb_has_ro_compat_feature(
#define XFS_SB_FEAT_INCOMPAT_EXCHRANGE (1 << 6) /* exchangerange supported */
#define XFS_SB_FEAT_INCOMPAT_PARENT (1 << 7) /* parent pointers */
#define XFS_SB_FEAT_INCOMPAT_METADIR (1 << 8) /* metadata dir tree */
+#define XFS_SB_FEAT_INCOMPAT_ZONED (1U << 31)/* zoned RT allocator */
+
#define XFS_SB_FEAT_INCOMPAT_ALL \
(XFS_SB_FEAT_INCOMPAT_FTYPE | \
XFS_SB_FEAT_INCOMPAT_SPINODES | \
@@ -952,7 +956,12 @@ struct xfs_dinode {
__be64 di_changecount; /* number of attribute changes */
__be64 di_lsn; /* flush sequence */
__be64 di_flags2; /* more random flags */
- __be32 di_cowextsize; /* basic cow extent size for file */
+ union {
+ /* basic cow extent size for (regular) file */
+ __be32 di_cowextsize;
+ /* used blocks in RTG for (zoned) rtrmap inode */
+ __be32 di_used_blocks;
+ };
__u8 di_pad2[12]; /* more padding for future expansion */

/* fields only written to during inode creation */
diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c
index f24fa628fecf..cd38be2a69be 100644
--- a/fs/xfs/libxfs/xfs_inode_buf.c
+++ b/fs/xfs/libxfs/xfs_inode_buf.c
@@ -252,7 +252,10 @@ xfs_inode_from_disk(
be64_to_cpu(from->di_changecount));
ip->i_crtime = xfs_inode_from_disk_ts(from, from->di_crtime);
ip->i_diflags2 = be64_to_cpu(from->di_flags2);
+ /* also covers the di_used_blocks union arm: */
ip->i_cowextsize = be32_to_cpu(from->di_cowextsize);
+ BUILD_BUG_ON(sizeof(from->di_cowextsize) !=
+ sizeof(from->di_used_blocks));
}

error = xfs_iformat_data_fork(ip, from);
@@ -349,6 +352,7 @@ xfs_inode_to_disk(
to->di_changecount = cpu_to_be64(inode_peek_iversion(inode));
to->di_crtime = xfs_inode_to_disk_ts(ip, ip->i_crtime);
to->di_flags2 = cpu_to_be64(ip->i_diflags2);
+ /* also covers the di_used_blocks union arm: */
to->di_cowextsize = cpu_to_be32(ip->i_cowextsize);
to->di_ino = cpu_to_be64(ip->i_ino);
to->di_lsn = cpu_to_be64(lsn);
@@ -752,11 +756,15 @@ xfs_dinode_verify(
!xfs_has_rtreflink(mp))
return __this_address;

- /* COW extent size hint validation */
- fa = xfs_inode_validate_cowextsize(mp, be32_to_cpu(dip->di_cowextsize),
- mode, flags, flags2);
- if (fa)
- return fa;
+ if (!xfs_has_zoned(mp) ||
+ dip->di_metatype != cpu_to_be16(XFS_METAFILE_RTRMAP)) {
+ /* COW extent size hint validation */
+ fa = xfs_inode_validate_cowextsize(mp,
+ be32_to_cpu(dip->di_cowextsize),
+ mode, flags, flags2);
+ if (fa)
+ return fa;
+ }

/* bigtime iflag can only happen on bigtime filesystems */
if (xfs_dinode_has_bigtime(dip) &&
diff --git a/fs/xfs/libxfs/xfs_inode_util.c b/fs/xfs/libxfs/xfs_inode_util.c
index deb0b7c00a1f..48fe49a5f050 100644
--- a/fs/xfs/libxfs/xfs_inode_util.c
+++ b/fs/xfs/libxfs/xfs_inode_util.c
@@ -322,6 +322,7 @@ xfs_inode_init(

if (xfs_has_v3inodes(mp)) {
inode_set_iversion(inode, 1);
+ /* also covers the di_used_blocks union arm: */
ip->i_cowextsize = 0;
times |= XFS_ICHGTIME_CREATE;
}
diff --git a/fs/xfs/libxfs/xfs_log_format.h b/fs/xfs/libxfs/xfs_log_format.h
index ec7157eaba5f..8f6fd195ce6e 100644
--- a/fs/xfs/libxfs/xfs_log_format.h
+++ b/fs/xfs/libxfs/xfs_log_format.h
@@ -481,7 +481,12 @@ struct xfs_log_dinode {
xfs_lsn_t di_lsn;

uint64_t di_flags2; /* more random flags */
- uint32_t di_cowextsize; /* basic cow extent size for file */
+ union {
+ /* basic cow extent size for (regular) file */
+ uint32_t di_cowextsize;
+ /* used blocks in RTG for (zoned) rtrmap inode */
+ uint32_t di_used_blocks;
+ };
uint8_t di_pad2[12]; /* more padding for future expansion */

/* fields only written to during inode creation */
diff --git a/fs/xfs/libxfs/xfs_ondisk.h b/fs/xfs/libxfs/xfs_ondisk.h
index a85ecddaa48e..5ed44fdf7491 100644
--- a/fs/xfs/libxfs/xfs_ondisk.h
+++ b/fs/xfs/libxfs/xfs_ondisk.h
@@ -233,8 +233,8 @@ xfs_check_ondisk_structs(void)
16299260424LL);

/* superblock field checks we got from xfs/122 */
- XFS_CHECK_STRUCT_SIZE(struct xfs_dsb, 288);
- XFS_CHECK_STRUCT_SIZE(struct xfs_sb, 288);
+ XFS_CHECK_STRUCT_SIZE(struct xfs_dsb, 304);
+ XFS_CHECK_STRUCT_SIZE(struct xfs_sb, 304);
XFS_CHECK_SB_OFFSET(sb_magicnum, 0);
XFS_CHECK_SB_OFFSET(sb_blocksize, 4);
XFS_CHECK_SB_OFFSET(sb_dblocks, 8);
@@ -295,6 +295,8 @@ xfs_check_ondisk_structs(void)
XFS_CHECK_SB_OFFSET(sb_rgextents, 276);
XFS_CHECK_SB_OFFSET(sb_rgblklog, 280);
XFS_CHECK_SB_OFFSET(sb_pad, 281);
+ XFS_CHECK_SB_OFFSET(sb_rtstart, 288);
+ XFS_CHECK_SB_OFFSET(sb_rtreserved, 296);
}

#endif /* __XFS_ONDISK_H */
diff --git a/fs/xfs/libxfs/xfs_rtbitmap.c b/fs/xfs/libxfs/xfs_rtbitmap.c
index 770adf60dd73..5057536e586c 100644
--- a/fs/xfs/libxfs/xfs_rtbitmap.c
+++ b/fs/xfs/libxfs/xfs_rtbitmap.c
@@ -1123,6 +1123,7 @@ xfs_rtfree_blocks(
xfs_extlen_t mod;
int error;

+ ASSERT(!xfs_has_zoned(mp));
ASSERT(rtlen <= XFS_MAX_BMBT_EXTLEN);

mod = xfs_blen_to_rtxoff(mp, rtlen);
@@ -1174,6 +1175,9 @@ xfs_rtalloc_query_range(

end = min(end, rtg->rtg_extents - 1);

+ if (xfs_has_zoned(mp))
+ return -EINVAL;
+
/* Iterate the bitmap, looking for discrepancies. */
while (start <= end) {
struct xfs_rtalloc_rec rec;
@@ -1268,6 +1272,8 @@ xfs_rtbitmap_blockcount_len(
struct xfs_mount *mp,
xfs_rtbxlen_t rtextents)
{
+ if (xfs_has_zoned(mp))
+ return 0;
return howmany_64(rtextents, xfs_rtbitmap_rtx_per_rbmblock(mp));
}

@@ -1308,6 +1314,11 @@ xfs_rtsummary_blockcount(
xfs_rtbxlen_t rextents = xfs_rtbitmap_bitcount(mp);
unsigned long long rsumwords;

+ if (xfs_has_zoned(mp)) {
+ *rsumlevels = 0;
+ return 0;
+ }
+
*rsumlevels = xfs_compute_rextslog(rextents) + 1;
rsumwords = xfs_rtbitmap_blockcount_len(mp, rextents) * (*rsumlevels);
return howmany_64(rsumwords, mp->m_blockwsize);
diff --git a/fs/xfs/libxfs/xfs_rtgroup.c b/fs/xfs/libxfs/xfs_rtgroup.c
index 97aad8967149..9186c58e83d5 100644
--- a/fs/xfs/libxfs/xfs_rtgroup.c
+++ b/fs/xfs/libxfs/xfs_rtgroup.c
@@ -194,15 +194,17 @@ xfs_rtgroup_lock(
ASSERT(!(rtglock_flags & XFS_RTGLOCK_BITMAP_SHARED) ||
!(rtglock_flags & XFS_RTGLOCK_BITMAP));

- if (rtglock_flags & XFS_RTGLOCK_BITMAP) {
- /*
- * Lock both realtime free space metadata inodes for a freespace
- * update.
- */
- xfs_ilock(rtg_bitmap(rtg), XFS_ILOCK_EXCL);
- xfs_ilock(rtg_summary(rtg), XFS_ILOCK_EXCL);
- } else if (rtglock_flags & XFS_RTGLOCK_BITMAP_SHARED) {
- xfs_ilock(rtg_bitmap(rtg), XFS_ILOCK_SHARED);
+ if (!xfs_has_zoned(rtg_mount(rtg))) {
+ if (rtglock_flags & XFS_RTGLOCK_BITMAP) {
+ /*
+ * Lock both realtime free space metadata inodes for a
+ * freespace update.
+ */
+ xfs_ilock(rtg_bitmap(rtg), XFS_ILOCK_EXCL);
+ xfs_ilock(rtg_summary(rtg), XFS_ILOCK_EXCL);
+ } else if (rtglock_flags & XFS_RTGLOCK_BITMAP_SHARED) {
+ xfs_ilock(rtg_bitmap(rtg), XFS_ILOCK_SHARED);
+ }
}

if ((rtglock_flags & XFS_RTGLOCK_RMAP) && rtg_rmap(rtg))
@@ -228,11 +230,13 @@ xfs_rtgroup_unlock(
if ((rtglock_flags & XFS_RTGLOCK_RMAP) && rtg_rmap(rtg))
xfs_iunlock(rtg_rmap(rtg), XFS_ILOCK_EXCL);

- if (rtglock_flags & XFS_RTGLOCK_BITMAP) {
- xfs_iunlock(rtg_summary(rtg), XFS_ILOCK_EXCL);
- xfs_iunlock(rtg_bitmap(rtg), XFS_ILOCK_EXCL);
- } else if (rtglock_flags & XFS_RTGLOCK_BITMAP_SHARED) {
- xfs_iunlock(rtg_bitmap(rtg), XFS_ILOCK_SHARED);
+ if (!xfs_has_zoned(rtg_mount(rtg))) {
+ if (rtglock_flags & XFS_RTGLOCK_BITMAP) {
+ xfs_iunlock(rtg_summary(rtg), XFS_ILOCK_EXCL);
+ xfs_iunlock(rtg_bitmap(rtg), XFS_ILOCK_EXCL);
+ } else if (rtglock_flags & XFS_RTGLOCK_BITMAP_SHARED) {
+ xfs_iunlock(rtg_bitmap(rtg), XFS_ILOCK_SHARED);
+ }
}
}

@@ -249,7 +253,8 @@ xfs_rtgroup_trans_join(
ASSERT(!(rtglock_flags & ~XFS_RTGLOCK_ALL_FLAGS));
ASSERT(!(rtglock_flags & XFS_RTGLOCK_BITMAP_SHARED));

- if (rtglock_flags & XFS_RTGLOCK_BITMAP) {
+ if (!xfs_has_zoned(rtg_mount(rtg)) &&
+ (rtglock_flags & XFS_RTGLOCK_BITMAP)) {
xfs_trans_ijoin(tp, rtg_bitmap(rtg), XFS_ILOCK_EXCL);
xfs_trans_ijoin(tp, rtg_summary(rtg), XFS_ILOCK_EXCL);
}
@@ -354,6 +359,7 @@ static const struct xfs_rtginode_ops xfs_rtginode_ops[XFS_RTGI_MAX] = {
.sick = XFS_SICK_RG_BITMAP,
.fmt_mask = (1U << XFS_DINODE_FMT_EXTENTS) |
(1U << XFS_DINODE_FMT_BTREE),
+ .enabled = xfs_has_nonzoned,
.create = xfs_rtbitmap_create,
},
[XFS_RTGI_SUMMARY] = {
@@ -362,6 +368,7 @@ static const struct xfs_rtginode_ops xfs_rtginode_ops[XFS_RTGI_MAX] = {
.sick = XFS_SICK_RG_SUMMARY,
.fmt_mask = (1U << XFS_DINODE_FMT_EXTENTS) |
(1U << XFS_DINODE_FMT_BTREE),
+ .enabled = xfs_has_nonzoned,
.create = xfs_rtsummary_create,
},
[XFS_RTGI_RMAP] = {
diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c
index 090f133f4da3..0bbe0b87bf04 100644
--- a/fs/xfs/libxfs/xfs_sb.c
+++ b/fs/xfs/libxfs/xfs_sb.c
@@ -30,6 +30,7 @@
#include "xfs_rtgroup.h"
#include "xfs_rtrmap_btree.h"
#include "xfs_rtrefcount_btree.h"
+#include "xfs_rtbitmap.h"

/*
* Physical superblock buffer manipulations. Shared with libxfs in userspace.
@@ -185,6 +186,8 @@ xfs_sb_version_to_features(
features |= XFS_FEAT_PARENT;
if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)
features |= XFS_FEAT_METADIR;
+ if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_ZONED)
+ features |= XFS_FEAT_ZONED;

return features;
}
@@ -266,6 +269,9 @@ static uint64_t
xfs_expected_rbmblocks(
struct xfs_sb *sbp)
{
+ if (xfs_sb_is_v5(sbp) &&
+ (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_ZONED))
+ return 0;
return howmany_64(xfs_extents_per_rbm(sbp),
NBBY * xfs_rtbmblock_size(sbp));
}
@@ -275,9 +281,19 @@ bool
xfs_validate_rt_geometry(
struct xfs_sb *sbp)
{
- if (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE ||
- sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE)
- return false;
+ if (xfs_sb_is_v5(sbp) &&
+ (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_ZONED)) {
+ if (sbp->sb_rextsize != 1)
+ return false;
+ if (sbp->sb_rtstart && sbp->sb_rtstart < sbp->sb_dblocks)
+ return false;
+ if (sbp->sb_rtreserved && sbp->sb_rtreserved >= sbp->sb_rblocks)
+ return false;
+ } else {
+ if (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE ||
+ sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE)
+ return false;
+ }

if (sbp->sb_rblocks == 0) {
if (sbp->sb_rextents != 0 || sbp->sb_rbmblocks != 0 ||
@@ -835,6 +851,14 @@ __xfs_sb_from_disk(
to->sb_rgcount = 1;
to->sb_rgextents = 0;
}
+
+ if (to->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_ZONED) {
+ to->sb_rtstart = be64_to_cpu(from->sb_rtstart);
+ to->sb_rtreserved = be64_to_cpu(from->sb_rtreserved);
+ } else {
+ to->sb_rtstart = 0;
+ to->sb_rtreserved = 0;
+ }
}

void
@@ -1001,6 +1025,11 @@ xfs_sb_to_disk(
to->sb_rbmino = cpu_to_be64(0);
to->sb_rsumino = cpu_to_be64(0);
}
+
+ if (from->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_ZONED) {
+ to->sb_rtstart = cpu_to_be64(from->sb_rtstart);
+ to->sb_rtreserved = cpu_to_be64(from->sb_rtreserved);
+ }
}

/*
diff --git a/fs/xfs/scrub/agheader.c b/fs/xfs/scrub/agheader.c
index 190d56f81344..68de763b2543 100644
--- a/fs/xfs/scrub/agheader.c
+++ b/fs/xfs/scrub/agheader.c
@@ -64,6 +64,8 @@ STATIC size_t
xchk_superblock_ondisk_size(
struct xfs_mount *mp)
{
+ if (xfs_has_zoned(mp))
+ return offsetofend(struct xfs_dsb, sb_rtreserved);
if (xfs_has_metadir(mp))
return offsetofend(struct xfs_dsb, sb_pad);
if (xfs_has_metauuid(mp))
diff --git a/fs/xfs/scrub/inode.c b/fs/xfs/scrub/inode.c
index db6edd5a5fe5..bb3f475b6353 100644
--- a/fs/xfs/scrub/inode.c
+++ b/fs/xfs/scrub/inode.c
@@ -273,6 +273,13 @@ xchk_inode_cowextsize(
xfs_failaddr_t fa;
uint32_t value = be32_to_cpu(dip->di_cowextsize);

+ /*
+ * The used block counter for rtrmap is checked and repaired elsewhere.
+ */
+ if (xfs_has_zoned(sc->mp) &&
+ dip->di_metatype == cpu_to_be16(XFS_METAFILE_RTRMAP))
+ return;
+
fa = xfs_inode_validate_cowextsize(sc->mp, value, mode, flags, flags2);
if (fa)
xchk_ino_set_corrupt(sc, ino);
diff --git a/fs/xfs/scrub/inode_repair.c b/fs/xfs/scrub/inode_repair.c
index 2f641b6d663e..c8d17dd4fc32 100644
--- a/fs/xfs/scrub/inode_repair.c
+++ b/fs/xfs/scrub/inode_repair.c
@@ -710,7 +710,9 @@ xrep_dinode_extsize_hints(
XFS_DIFLAG_EXTSZINHERIT);
}

- if (dip->di_version < 3)
+ if (dip->di_version < 3 ||
+ (xfs_has_zoned(sc->mp) &&
+ dip->di_metatype == cpu_to_be16(XFS_METAFILE_RTRMAP)))
return;

fa = xfs_inode_validate_cowextsize(mp, be32_to_cpu(dip->di_cowextsize),
diff --git a/fs/xfs/scrub/scrub.c b/fs/xfs/scrub/scrub.c
index 7567dd5cad14..1a05c27ba471 100644
--- a/fs/xfs/scrub/scrub.c
+++ b/fs/xfs/scrub/scrub.c
@@ -387,12 +387,14 @@ static const struct xchk_meta_ops meta_scrub_ops[] = {
},
[XFS_SCRUB_TYPE_RTBITMAP] = { /* realtime bitmap */
.type = ST_RTGROUP,
+ .has = xfs_has_nonzoned,
.setup = xchk_setup_rtbitmap,
.scrub = xchk_rtbitmap,
.repair = xrep_rtbitmap,
},
[XFS_SCRUB_TYPE_RTSUM] = { /* realtime summary */
.type = ST_RTGROUP,
+ .has = xfs_has_nonzoned,
.setup = xchk_setup_rtsummary,
.scrub = xchk_rtsummary,
.repair = xrep_rtsummary,
diff --git a/fs/xfs/xfs_fsmap.c b/fs/xfs/xfs_fsmap.c
index 1dbd2d75f7ae..917d4d0e51b3 100644
--- a/fs/xfs/xfs_fsmap.c
+++ b/fs/xfs/xfs_fsmap.c
@@ -1138,7 +1138,11 @@ xfs_getfsmap(
handlers[1].fn = xfs_getfsmap_logdev;
}
#ifdef CONFIG_XFS_RT
- if (mp->m_rtdev_targp) {
+ /*
+ * For zoned file systems there is no rtbitmap, so only support fsmap
+ * if the callers is privileged enough to use the full rmap version.
+ */
+ if (mp->m_rtdev_targp && (use_rmap || !xfs_has_zoned(mp))) {
handlers[2].nr_sectors = XFS_FSB_TO_BB(mp, mp->m_sb.sb_rblocks);
handlers[2].dev = new_encode_dev(mp->m_rtdev_targp->bt_dev);
if (use_rmap)
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index c95fe1b1de4e..4624d40c664c 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -3071,5 +3071,6 @@ bool
xfs_is_always_cow_inode(
const struct xfs_inode *ip)
{
- return ip->i_mount->m_always_cow && xfs_has_reflink(ip->i_mount);
+ return xfs_is_zoned_inode(ip) ||
+ (ip->i_mount->m_always_cow && xfs_has_reflink(ip->i_mount));
}
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index c08093a65352..10cd8f0c4697 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -69,8 +69,13 @@ typedef struct xfs_inode {
xfs_rfsblock_t i_nblocks; /* # of direct & btree blocks */
prid_t i_projid; /* owner's project id */
xfs_extlen_t i_extsize; /* basic/minimum extent size */
- /* cowextsize is only used for v3 inodes, flushiter for v1/2 */
+ /*
+ * i_used_blocks is used for zoned rtrmap inodes,
+ * i_cowextsize is used for other v3 inodes,
+ * i_flushiter for v1/2 inodes
+ */
union {
+ uint32_t i_used_blocks; /* used blocks in RTG */
xfs_extlen_t i_cowextsize; /* basic cow extent size */
uint16_t i_flushiter; /* incremented on flush */
};
@@ -309,6 +314,11 @@ static inline bool xfs_is_internal_inode(const struct xfs_inode *ip)
xfs_is_quota_inode(&mp->m_sb, ip->i_ino);
}

+static inline bool xfs_is_zoned_inode(const struct xfs_inode *ip)
+{
+ return xfs_has_zoned(ip->i_mount) && XFS_IS_REALTIME_INODE(ip);
+}
+
bool xfs_is_always_cow_inode(const struct xfs_inode *ip);

static inline bool xfs_is_cow_inode(const struct xfs_inode *ip)
diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c
index 70283c6419fd..2f1122e3ab12 100644
--- a/fs/xfs/xfs_inode_item.c
+++ b/fs/xfs/xfs_inode_item.c
@@ -596,6 +596,7 @@ xfs_inode_to_log_dinode(
to->di_changecount = inode_peek_iversion(inode);
to->di_crtime = xfs_inode_to_log_dinode_ts(ip, ip->i_crtime);
to->di_flags2 = ip->i_diflags2;
+ /* also covers the di_used_blocks union arm: */
to->di_cowextsize = ip->i_cowextsize;
to->di_ino = ip->i_ino;
to->di_lsn = lsn;
diff --git a/fs/xfs/xfs_inode_item_recover.c b/fs/xfs/xfs_inode_item_recover.c
index 4e583bfc5ca8..7b8b8610de35 100644
--- a/fs/xfs/xfs_inode_item_recover.c
+++ b/fs/xfs/xfs_inode_item_recover.c
@@ -203,6 +203,7 @@ xfs_log_dinode_to_disk(
to->di_crtime = xfs_log_dinode_to_disk_ts(from,
from->di_crtime);
to->di_flags2 = cpu_to_be64(from->di_flags2);
+ /* also covers the di_used_blocks union arm: */
to->di_cowextsize = cpu_to_be32(from->di_cowextsize);
to->di_ino = cpu_to_be64(from->di_ino);
to->di_lsn = cpu_to_be64(lsn);
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index f3f4b5c328c3..aa1db0dc1d98 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -1216,6 +1216,7 @@ xfs_bmapi_reserve_delalloc(

fdblocks = indlen;
if (XFS_IS_REALTIME_INODE(ip)) {
+ ASSERT(!xfs_is_zoned_inode(ip));
error = xfs_dec_frextents(mp, xfs_blen_to_rtbxlen(mp, alen));
if (error)
goto out_unreserve_quota;
diff --git a/fs/xfs/xfs_message.c b/fs/xfs/xfs_message.c
index 6ed485ff2756..15d410d16bb2 100644
--- a/fs/xfs/xfs_message.c
+++ b/fs/xfs/xfs_message.c
@@ -173,6 +173,10 @@ xfs_warn_experimental(
.opstate = XFS_OPSTATE_WARNED_METADIR,
.name = "metadata directory tree",
},
+ [XFS_EXPERIMENTAL_ZONED] = {
+ .opstate = XFS_OPSTATE_WARNED_ZONED,
+ .name = "zoned RT device",
+ },
};
ASSERT(feat >= 0 && feat < XFS_EXPERIMENTAL_MAX);
BUILD_BUG_ON(ARRAY_SIZE(features) != XFS_EXPERIMENTAL_MAX);
diff --git a/fs/xfs/xfs_message.h b/fs/xfs/xfs_message.h
index 7fb36ced9df7..a92a4d09c8e9 100644
--- a/fs/xfs/xfs_message.h
+++ b/fs/xfs/xfs_message.h
@@ -99,6 +99,7 @@ enum xfs_experimental_feat {
XFS_EXPERIMENTAL_EXCHRANGE,
XFS_EXPERIMENTAL_PPTR,
XFS_EXPERIMENTAL_METADIR,
+ XFS_EXPERIMENTAL_ZONED,

XFS_EXPERIMENTAL_MAX,
};
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 73bc053fdd17..72c5389ff78b 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -343,6 +343,7 @@ typedef struct xfs_mount {
#define XFS_FEAT_NREXT64 (1ULL << 26) /* large extent counters */
#define XFS_FEAT_EXCHANGE_RANGE (1ULL << 27) /* exchange range */
#define XFS_FEAT_METADIR (1ULL << 28) /* metadata directory tree */
+#define XFS_FEAT_ZONED (1ULL << 29) /* zoned RT device */

/* Mount features */
#define XFS_FEAT_NOATTR2 (1ULL << 48) /* disable attr2 creation */
@@ -399,6 +400,7 @@ __XFS_HAS_FEAT(needsrepair, NEEDSREPAIR)
__XFS_HAS_FEAT(large_extent_counts, NREXT64)
__XFS_HAS_FEAT(exchange_range, EXCHANGE_RANGE)
__XFS_HAS_FEAT(metadir, METADIR)
+__XFS_HAS_FEAT(zoned, ZONED)

static inline bool xfs_has_rtgroups(const struct xfs_mount *mp)
{
@@ -409,7 +411,9 @@ static inline bool xfs_has_rtgroups(const struct xfs_mount *mp)
static inline bool xfs_has_rtsb(const struct xfs_mount *mp)
{
/* all rtgroups filesystems with an rt section have an rtsb */
- return xfs_has_rtgroups(mp) && xfs_has_realtime(mp);
+ return xfs_has_rtgroups(mp) &&
+ xfs_has_realtime(mp) &&
+ !xfs_has_zoned(mp);
}

static inline bool xfs_has_rtrmapbt(const struct xfs_mount *mp)
@@ -424,6 +428,11 @@ static inline bool xfs_has_rtreflink(const struct xfs_mount *mp)
xfs_has_reflink(mp);
}

+static inline bool xfs_has_nonzoned(const struct xfs_mount *mp)
+{
+ return !xfs_has_zoned(mp);
+}
+
/*
* Some features are always on for v5 file systems, allow the compiler to
* eliminiate dead code when building without v4 support.
@@ -527,6 +536,8 @@ __XFS_HAS_FEAT(nouuid, NOUUID)
#define XFS_OPSTATE_WARNED_METADIR 17
/* Filesystem should use qflags to determine quotaon status */
#define XFS_OPSTATE_RESUMING_QUOTAON 18
+/* Kernel has logged a warning about zoned RT device being used on this fs. */
+#define XFS_OPSTATE_WARNED_ZONED 19

#define __XFS_IS_OPSTATE(name, NAME) \
static inline bool xfs_is_ ## name (struct xfs_mount *mp) \
diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c
index 8da2498417f5..e457a2c2d561 100644
--- a/fs/xfs/xfs_rtalloc.c
+++ b/fs/xfs/xfs_rtalloc.c
@@ -2097,6 +2097,8 @@ xfs_bmap_rtalloc(
ap->datatype & XFS_ALLOC_INITIAL_USER_DATA;
int error;

+ ASSERT(!xfs_has_zoned(ap->tp->t_mountp));
+
retry:
error = xfs_rtallocate_align(ap, &ralen, &raminlen, &prod, &noalign);
if (error)
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index f57c27940467..92dd44965943 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1784,8 +1784,17 @@ xfs_fs_fill_super(
mp->m_features &= ~XFS_FEAT_DISCARD;
}

- if (xfs_has_metadir(mp))
+ if (xfs_has_zoned(mp)) {
+ if (!xfs_has_metadir(mp)) {
+ xfs_alert(mp,
+ "metadir feature required for zoned realtime devices.");
+ error = -EINVAL;
+ goto out_filestream_unmount;
+ }
+ xfs_warn_experimental(mp, XFS_EXPERIMENTAL_ZONED);
+ } else if (xfs_has_metadir(mp)) {
xfs_warn_experimental(mp, XFS_EXPERIMENTAL_METADIR);
+ }

if (xfs_has_reflink(mp)) {
if (xfs_has_realtime(mp) &&
--
2.45.2