On 4/6/21 4:59 AM, Dave Chinner wrote:
From: Dave Chinner <dchinner@xxxxxxxxxx>
Default attr fork offset is based on inode size, so is a fixed
geometry parameter of the inode. Move it to the xfs_ino_geometry
structure and stop calculating it on every call to
xfs_default_attroffset().
Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Ok, makes sense
Reviewed-by: Allison Henderson <allison.henderson@xxxxxxxxxx>
---
fs/xfs/libxfs/xfs_bmap.c | 21 ++++++++++-----------
fs/xfs/libxfs/xfs_bmap.h | 1 +
fs/xfs/libxfs/xfs_shared.h | 4 ++++
fs/xfs/xfs_mount.c | 14 +++++++++++++-
4 files changed, 28 insertions(+), 12 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
index 414882ebcc8e..f937d3f05bc7 100644
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -94,6 +94,15 @@ xfs_bmap_compute_maxlevels(
mp->m_bm_maxlevels[whichfork] = level;
}
+unsigned int
+xfs_bmap_compute_attr_offset(
+ struct xfs_mount *mp)
+{
+ if (mp->m_sb.sb_inodesize == 256)
+ return XFS_LITINO(mp) - XFS_BMDR_SPACE_CALC(MINABTPTRS);
+ return XFS_BMDR_SPACE_CALC(6 * MINABTPTRS);
+}
+
STATIC int /* error */
xfs_bmbt_lookup_eq(
struct xfs_btree_cur *cur,
@@ -192,19 +201,9 @@ uint
xfs_default_attroffset(
struct xfs_inode *ip)
{
- struct xfs_mount *mp = ip->i_mount;
- uint offset;
-
if (ip->i_df.if_format == XFS_DINODE_FMT_DEV)
return roundup(sizeof(xfs_dev_t), 8);
-
- if (mp->m_sb.sb_inodesize == 256)
- offset = XFS_LITINO(mp) - XFS_BMDR_SPACE_CALC(MINABTPTRS);
- else
- offset = XFS_BMDR_SPACE_CALC(6 * MINABTPTRS);
-
- ASSERT(offset < XFS_LITINO(mp));
- return offset;
+ return M_IGEO(ip->i_mount)->attr_fork_offset;
}
/*
diff --git a/fs/xfs/libxfs/xfs_bmap.h b/fs/xfs/libxfs/xfs_bmap.h
index 6747e97a7949..a49df4092c30 100644
--- a/fs/xfs/libxfs/xfs_bmap.h
+++ b/fs/xfs/libxfs/xfs_bmap.h
@@ -185,6 +185,7 @@ static inline bool xfs_bmap_is_written_extent(struct xfs_bmbt_irec *irec)
void xfs_trim_extent(struct xfs_bmbt_irec *irec, xfs_fileoff_t bno,
xfs_filblks_t len);
+unsigned int xfs_bmap_compute_attr_offset(struct xfs_mount *mp);
int xfs_bmap_add_attrfork(struct xfs_inode *ip, int size, int rsvd);
int xfs_bmap_set_attrforkoff(struct xfs_inode *ip, int size, int *version);
void xfs_bmap_local_to_extents_empty(struct xfs_trans *tp,
diff --git a/fs/xfs/libxfs/xfs_shared.h b/fs/xfs/libxfs/xfs_shared.h
index 8c61a461bf7b..782fdd08f759 100644
--- a/fs/xfs/libxfs/xfs_shared.h
+++ b/fs/xfs/libxfs/xfs_shared.h
@@ -176,8 +176,12 @@ struct xfs_ino_geometry {
unsigned int agino_log; /* #bits for agino in inum */
+ /* precomputed default inode attribute fork offset */
+ unsigned int attr_fork_offset;
+
/* precomputed value for di_flags2 */
uint64_t new_diflags2;
+
};
#endif /* __XFS_SHARED_H__ */
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 1c97b155a8ee..cb1e2c4702c3 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -675,6 +675,18 @@ xfs_unmount_flush_inodes(
xfs_health_unmount(mp);
}
+static void
+xfs_mount_setup_inode_geom(
+ struct xfs_mount *mp)
+{
+ struct xfs_ino_geometry *igeo = M_IGEO(mp);
+
+ igeo->attr_fork_offset = xfs_bmap_compute_attr_offset(mp);
+ ASSERT(igeo->attr_fork_offset < XFS_LITINO(mp));
+
+ xfs_ialloc_setup_geometry(mp);
+}
+
/*
* This function does the following on an initial mount of a file system:
* - reads the superblock from disk and init the mount struct
@@ -758,7 +770,7 @@ xfs_mountfs(
xfs_alloc_compute_maxlevels(mp);
xfs_bmap_compute_maxlevels(mp, XFS_DATA_FORK);
xfs_bmap_compute_maxlevels(mp, XFS_ATTR_FORK);
- xfs_ialloc_setup_geometry(mp);
+ xfs_mount_setup_inode_geom(mp);
xfs_rmapbt_compute_maxlevels(mp);
xfs_refcountbt_compute_maxlevels(mp);
