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xfs: create routine to allocate and initialize a realtime refcount btree inode

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

Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2024-11-20 16:20:56 -08:00
parent e5a171729b
commit 4ee3113aaf
3 changed files with 33 additions and 0 deletions
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2
fs/xfs/libxfs/xfs_rtgroup.c
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@ -34,6 +34,7 @@
#include "xfs_metafile.h"
#include "xfs_metadir.h"
#include "xfs_rtrmap_btree.h"
#include "xfs_rtrefcount_btree.h"
/* Find the first usable fsblock in this rtgroup. */
static inline uint32_t
@ -382,6 +383,7 @@ static const struct xfs_rtginode_ops xfs_rtginode_ops[XFS_RTGI_MAX] = {
.fmt_mask = 1U << XFS_DINODE_FMT_META_BTREE,
/* same comment about growfs and rmap inodes applies here */
.enabled = xfs_has_reflink,
.create = xfs_rtrefcountbt_create,
},
};

28
fs/xfs/libxfs/xfs_rtrefcount_btree.c
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@ -721,3 +721,31 @@ xfs_iflush_rtrefcount(
ifp->if_broot_bytes, dfp,
XFS_DFORK_SIZE(dip, ip->i_mount, XFS_DATA_FORK));
}
/*
* Create a realtime refcount btree inode.
*/
int
xfs_rtrefcountbt_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_rtrefcount_broot_space_calc(mp, 0, 0));
if (broot)
xfs_btree_init_block(mp, broot, &xfs_rtrefcountbt_ops, 0, 0,
ip->i_ino);
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE | XFS_ILOG_DBROOT);
return 0;
}

3
fs/xfs/libxfs/xfs_rtrefcount_btree.h
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@ -183,4 +183,7 @@ void xfs_rtrefcountbt_to_disk(struct xfs_mount *mp,
struct xfs_rtrefcount_root *dblock, int dblocklen);
void xfs_iflush_rtrefcount(struct xfs_inode *ip, struct xfs_dinode *dip);
int xfs_rtrefcountbt_create(struct xfs_rtgroup *rtg, struct xfs_inode *ip,
struct xfs_trans *tp, bool init);
#endif /* __XFS_RTREFCOUNT_BTREE_H__ */