[PATCH 16/37] xfs: create routine to allocate and initialize a realtime rmap btree inode

Darrick J. Wong
2024-12-13T01:04:45Z

From: Darrick J. Wong <djwong@kernel.org>

Create a library routine to allocate and initialize an empty realtime
rmapbt inode. We'll use this for mkfs and repair.

Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
---
fs/xfs/libxfs/xfs_rtgroup.c | 2 +
fs/xfs/libxfs/xfs_rtrmap_btree.c | 54 ++++++++++++++++++++++++++++++++++++++
fs/xfs/libxfs/xfs_rtrmap_btree.h | 5 ++++
fs/xfs/xfs_rtalloc.c | 12 +++++++-
4 files changed, 71 insertions(+), 2 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_rtgroup.c b/fs/xfs/libxfs/xfs_rtgroup.c
index af1716ec0691a4..5f31b6e65d5d17 100644
--- a/fs/xfs/libxfs/xfs_rtgroup.c
+++ b/fs/xfs/libxfs/xfs_rtgroup.c
@@ -33,6 +33,7 @@
#include "xfs_rtbitmap.h"
#include "xfs_metafile.h"
#include "xfs_metadir.h"
+#include "xfs_rtrmap_btree.h"

/* Find the first usable fsblock in this rtgroup. */
static inline uint32_t
@@ -363,6 +364,7 @@ static const struct xfs_rtginode_ops xfs_rtginode_ops[XFS_RTGI_MAX] = {
* rtrmapbt predicate here.
*/
.enabled = xfs_has_rmapbt,
+ .create = xfs_rtrmapbt_create,
},
};

diff --git a/fs/xfs/libxfs/xfs_rtrmap_btree.c b/fs/xfs/libxfs/xfs_rtrmap_btree.c
index d90189a1ef10b5..7654661f4f5823 100644
--- a/fs/xfs/libxfs/xfs_rtrmap_btree.c
+++ b/fs/xfs/libxfs/xfs_rtrmap_btree.c
@@ -832,3 +832,57 @@ xfs_iflush_rtrmap(
xfs_rtrmapbt_to_disk(ip->i_mount, ifp->if_broot, ifp->if_broot_bytes,
dfp, XFS_DFORK_SIZE(dip, ip->i_mount, XFS_DATA_FORK));
}
+
+/*
+ * Create a realtime rmap btree inode.
+ */
+int
+xfs_rtrmapbt_create(
+ struct xfs_rtgroup *rtg,
+ struct xfs_inode *ip,
+ struct xfs_trans *tp,
+ bool init)
+{
+ struct xfs_ifork *ifp = xfs_ifork_ptr(ip, XFS_DATA_FORK);
+ struct xfs_mount *mp = ip->i_mount;
+ struct xfs_btree_block *broot;
+
+ ifp->if_format = XFS_DINODE_FMT_META_BTREE;
+ ASSERT(ifp->if_broot_bytes == 0);
+ ASSERT(ifp->if_bytes == 0);
+
+ /* Initialize the empty incore btree root. */
+ broot = xfs_broot_realloc(ifp, xfs_rtrmap_broot_space_calc(mp, 0, 0));
+ if (broot)
+ xfs_btree_init_block(mp, broot, &xfs_rtrmapbt_ops, 0, 0,
+ ip->i_ino);
+ xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE | XFS_ILOG_DBROOT);
+
+ return 0;
+}
+
+/*
+ * Initialize an rmap for a realtime superblock using the potentially updated
+ * rt geometry in the provided @mp.
+ */
+int
+xfs_rtrmapbt_init_rtsb(
+ struct xfs_mount *mp,
+ struct xfs_rtgroup *rtg,
+ struct xfs_trans *tp)
+{
+ struct xfs_rmap_irec rmap = {
+ .rm_blockcount = mp->m_sb.sb_rextsize,
+ .rm_owner = XFS_RMAP_OWN_FS,
+ };
+ struct xfs_btree_cur *cur;
+ int error;
+
+ ASSERT(xfs_has_rtsb(mp));
+ ASSERT(rtg_rgno(rtg) == 0);
+
+ cur = xfs_rtrmapbt_init_cursor(tp, rtg);
+ error = xfs_rmap_map_raw(cur, &rmap);
+ xfs_btree_del_cursor(cur, error);
+ return error;
+}
diff --git a/fs/xfs/libxfs/xfs_rtrmap_btree.h b/fs/xfs/libxfs/xfs_rtrmap_btree.h
index ddae34cac10f1c..db313492b17eed 100644
--- a/fs/xfs/libxfs/xfs_rtrmap_btree.h
+++ b/fs/xfs/libxfs/xfs_rtrmap_btree.h
@@ -193,4 +193,9 @@ void xfs_rtrmapbt_to_disk(struct xfs_mount *mp, struct xfs_btree_block *rblock,
unsigned int dblocklen);
void xfs_iflush_rtrmap(struct xfs_inode *ip, struct xfs_dinode *dip);

+int xfs_rtrmapbt_create(struct xfs_rtgroup *rtg, struct xfs_inode *ip,
+ struct xfs_trans *tp, bool init);
+int xfs_rtrmapbt_init_rtsb(struct xfs_mount *mp, struct xfs_rtgroup *rtg,
+ struct xfs_trans *tp);
+
#endif /* __XFS_RTRMAP_BTREE_H__ */
diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c
index 2245f9ecaa3398..c7efd926413981 100644
--- a/fs/xfs/xfs_rtalloc.c
+++ b/fs/xfs/xfs_rtalloc.c
@@ -846,6 +846,13 @@ xfs_growfs_rt_init_rtsb(
mp->m_rtsb_bp = rtsb_bp;
error = xfs_bwrite(rtsb_bp);
xfs_buf_unlock(rtsb_bp);
+ if (error)
+ return error;
+
+ /* Initialize the rtrmap to reflect the rtsb. */
+ if (rtg_rmap(args->rtg) != NULL)
+ error = xfs_rtrmapbt_init_rtsb(nargs->mp, args->rtg, args->tp);
+
return error;
}

@@ -894,8 +901,9 @@ xfs_growfs_rt_bmblock(
goto out_free;
nargs.tp = args.tp;

- xfs_rtgroup_lock(args.rtg, XFS_RTGLOCK_BITMAP);
- xfs_rtgroup_trans_join(args.tp, args.rtg, XFS_RTGLOCK_BITMAP);
+ xfs_rtgroup_lock(args.rtg, XFS_RTGLOCK_BITMAP | XFS_RTGLOCK_RMAP);
+ xfs_rtgroup_trans_join(args.tp, args.rtg,
+ XFS_RTGLOCK_BITMAP | XFS_RTGLOCK_RMAP);

/*
* Update the bitmap inode's size ondisk and incore. We need to update