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xfs: add realtime refcount btree inode to metadata directory

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Add a metadir path to select the realtime refcount btree inode and load
it at mount time.  The rtrefcountbt inode will have a unique extent format
code, which means that we also have to update the inode validation and
flush routines to look for it.

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 16:20:52 -08:00
parent e08d0f2004
commit eaed472c40
6 changed files with 30 additions and 4 deletions
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4
fs/xfs/libxfs/xfs_format.h
View File

@ -858,6 +858,7 @@ enum xfs_metafile_type {
XFS_METAFILE_RTBITMAP, /* rt bitmap */
XFS_METAFILE_RTSUMMARY, /* rt summary */
XFS_METAFILE_RTRMAP, /* rt rmap */
XFS_METAFILE_RTREFCOUNT, /* rt refcount */
XFS_METAFILE_MAX
} __packed;
@ -870,7 +871,8 @@ enum xfs_metafile_type {
{ XFS_METAFILE_PRJQUOTA, "prjquota" }, \
{ XFS_METAFILE_RTBITMAP, "rtbitmap" }, \
{ XFS_METAFILE_RTSUMMARY, "rtsummary" }, \
{ XFS_METAFILE_RTRMAP, "rtrmap" }
{ XFS_METAFILE_RTRMAP, "rtrmap" }, \
{ XFS_METAFILE_RTREFCOUNT, "rtrefcount" }
/*
* On-disk inode structure.

5
fs/xfs/libxfs/xfs_inode_buf.c
View File

@ -456,6 +456,11 @@ xfs_dinode_verify_fork(
if (!xfs_has_rmapbt(mp))
return __this_address;
break;
case XFS_METAFILE_RTREFCOUNT:
/* same comment about growfs and rmap inodes applies */
if (!xfs_has_reflink(mp))
return __this_address;
break;
default:
return __this_address;
}

6
fs/xfs/libxfs/xfs_inode_fork.c
View File

@ -272,6 +272,9 @@ xfs_iformat_data_fork(
switch (ip->i_metatype) {
case XFS_METAFILE_RTRMAP:
return xfs_iformat_rtrmap(ip, dip);
case XFS_METAFILE_RTREFCOUNT:
ASSERT(0); /* to be implemented later */
return -EFSCORRUPTED;
default:
break;
}
@ -620,6 +623,9 @@ xfs_iflush_fork(
case XFS_METAFILE_RTRMAP:
xfs_iflush_rtrmap(ip, dip);
break;
case XFS_METAFILE_RTREFCOUNT:
ASSERT(0); /* to be implemented later */
break;
default:
ASSERT(0);
break;

7
fs/xfs/libxfs/xfs_rtgroup.c
View File

@ -367,6 +367,13 @@ static const struct xfs_rtginode_ops xfs_rtginode_ops[XFS_RTGI_MAX] = {
.enabled = xfs_has_rmapbt,
.create = xfs_rtrmapbt_create,
},
[XFS_RTGI_REFCOUNT] = {
.name = "refcount",
.metafile_type = XFS_METAFILE_RTREFCOUNT,
.fmt_mask = 1U << XFS_DINODE_FMT_META_BTREE,
/* same comment about growfs and rmap inodes applies here */
.enabled = xfs_has_reflink,
},
};
/* Return the shortname of this rtgroup inode. */

6
fs/xfs/libxfs/xfs_rtgroup.h
View File

@ -15,6 +15,7 @@ enum xfs_rtg_inodes {
XFS_RTGI_BITMAP, /* allocation bitmap */
XFS_RTGI_SUMMARY, /* allocation summary */
XFS_RTGI_RMAP, /* rmap btree inode */
XFS_RTGI_REFCOUNT, /* refcount btree inode */
XFS_RTGI_MAX,
};
@ -80,6 +81,11 @@ static inline struct xfs_inode *rtg_rmap(const struct xfs_rtgroup *rtg)
return rtg->rtg_inodes[XFS_RTGI_RMAP];
}
static inline struct xfs_inode *rtg_refcount(const struct xfs_rtgroup *rtg)
{
return rtg->rtg_inodes[XFS_RTGI_REFCOUNT];
}
/* Passive rtgroup references */
static inline struct xfs_rtgroup *
xfs_rtgroup_get(

6
fs/xfs/libxfs/xfs_rtrefcount_btree.c
View File

@ -26,6 +26,7 @@
#include "xfs_extent_busy.h"
#include "xfs_rtgroup.h"
#include "xfs_rtbitmap.h"
#include "xfs_metafile.h"
static struct kmem_cache *xfs_rtrefcountbt_cur_cache;
@ -281,12 +282,10 @@ xfs_rtrefcountbt_init_cursor(
struct xfs_trans *tp,
struct xfs_rtgroup *rtg)
{
struct xfs_inode *ip = NULL;
struct xfs_inode *ip = rtg_refcount(rtg);
struct xfs_mount *mp = rtg_mount(rtg);
struct xfs_btree_cur *cur;
return NULL; /* XXX */
xfs_assert_ilocked(ip, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL);
cur = xfs_btree_alloc_cursor(mp, tp, &xfs_rtrefcountbt_ops,
@ -316,6 +315,7 @@ xfs_rtrefcountbt_commit_staged_btree(
int flags = XFS_ILOG_CORE | XFS_ILOG_DBROOT;
ASSERT(cur->bc_flags & XFS_BTREE_STAGING);
ASSERT(ifake->if_fork->if_format == XFS_DINODE_FMT_META_BTREE);
/*
* Free any resources hanging off the real fork, then shallow-copy the