[03/23] xfs: create transaction reservations for metadata inode operations

Commit Message

Darrick J. Wong Dec. 30, 2022, 10:17 p.m. UTC

From: Darrick J. Wong <[e-mail]>

Create transaction reservation types and block reservation helpers to
help us calculate transaction requirements.  Right now the reservations
are the same as always; we're just separating the symbols for a future
patch.

Signed-off-by: Darrick J. Wong <[e-mail]>
---
 fs/xfs/libxfs/xfs_imeta.c      |   20 ++++++++++++++++++++
 fs/xfs/libxfs/xfs_imeta.h      |    3 +++
 fs/xfs/libxfs/xfs_trans_resv.c |    4 ++++
 fs/xfs/libxfs/xfs_trans_resv.h |    2 ++
 4 files changed, 29 insertions(+)

Patch

diff --git a/fs/xfs/libxfs/xfs_imeta.c b/fs/xfs/libxfs/xfs_imeta.c
index 0a1cd0c5c15b..f14b7892f50d 100644
--- a/fs/xfs/libxfs/xfs_imeta.c
+++ b/fs/xfs/libxfs/xfs_imeta.c
@@ -19,6 +19,10 @@ 
 #include "xfs_inode.h"
 #include "xfs_quota.h"
 #include "xfs_ialloc.h"
+#include "xfs_bmap_btree.h"
+#include "xfs_da_format.h"
+#include "xfs_da_btree.h"
+#include "xfs_trans_space.h"
 
 /*
  * Metadata Inode Number Management
@@ -436,3 +440,19 @@  xfs_imeta_mount(
 {
 	return 0;
 }
+
+/* Calculate the log block reservation to create a metadata inode. */
+unsigned int
+xfs_imeta_create_space_res(
+	struct xfs_mount	*mp)
+{
+	return XFS_IALLOC_SPACE_RES(mp);
+}
+
+/* Calculate the log block reservation to unlink a metadata inode. */
+unsigned int
+xfs_imeta_unlink_space_res(
+	struct xfs_mount	*mp)
+{
+	return XFS_REMOVE_SPACE_RES(mp);
+}
diff --git a/fs/xfs/libxfs/xfs_imeta.h b/fs/xfs/libxfs/xfs_imeta.h
index b535e19ff1a0..9d54cb0d7962 100644
--- a/fs/xfs/libxfs/xfs_imeta.h
+++ b/fs/xfs/libxfs/xfs_imeta.h
@@ -45,4 +45,7 @@  int xfs_imeta_start_update(struct xfs_mount *mp,
 bool xfs_is_static_meta_ino(struct xfs_mount *mp, xfs_ino_t ino);
 int xfs_imeta_mount(struct xfs_mount *mp);
 
+unsigned int xfs_imeta_create_space_res(struct xfs_mount *mp);
+unsigned int xfs_imeta_unlink_space_res(struct xfs_mount *mp);
+
 #endif /* __XFS_IMETA_H__ */
diff --git a/fs/xfs/libxfs/xfs_trans_resv.c b/fs/xfs/libxfs/xfs_trans_resv.c
index 5b2f27cbdb80..d2716184bd8f 100644
--- a/fs/xfs/libxfs/xfs_trans_resv.c
+++ b/fs/xfs/libxfs/xfs_trans_resv.c
@@ -1025,4 +1025,8 @@  xfs_trans_resv_calc(
 	resp->tr_itruncate.tr_logcount += logcount_adj;
 	resp->tr_write.tr_logcount += logcount_adj;
 	resp->tr_qm_dqalloc.tr_logcount += logcount_adj;
+
+	/* metadata inode creation and unlink */
+	resp->tr_imeta_create = resp->tr_create;
+	resp->tr_imeta_unlink = resp->tr_remove;
 }
diff --git a/fs/xfs/libxfs/xfs_trans_resv.h b/fs/xfs/libxfs/xfs_trans_resv.h
index 0554b9d775d2..3836c5131b91 100644
--- a/fs/xfs/libxfs/xfs_trans_resv.h
+++ b/fs/xfs/libxfs/xfs_trans_resv.h
@@ -48,6 +48,8 @@  struct xfs_trans_resv {
 	struct xfs_trans_res	tr_qm_dqalloc;	/* allocate quota on disk */
 	struct xfs_trans_res	tr_sb;		/* modify superblock */
 	struct xfs_trans_res	tr_fsyncts;	/* update timestamps on fsync */
+	struct xfs_trans_res	tr_imeta_create; /* create metadata inode */
+	struct xfs_trans_res	tr_imeta_unlink; /* unlink metadata inode */
 };
 
 /* shorthand way of accessing reservation structure */