On 9/20/19 6:51 AM, Brian Foster wrote:
On Thu, Sep 05, 2019 at 03:18:31PM -0700, Allison Collins wrote:
This patch adds a new struct xfs_delay_context, which we
will use to keep track of the current state of a delayed
attribute operation.
The flags member is used to track various operations that
are in progress so that we know not to repeat them, and
resume where we left off before EAGAIN was returned to
cycle out the transaction. Other members take the place
of local variables that need to retain their values
across multiple function recalls.
Signed-off-by: Allison Collins <allison.henderson@xxxxxxxxxx>
---
Ok, I'll have to get further along in the usage of these bits to fully
grok this one. One quick note in the meantime...
Ok, yeah a lot of whats in here is dependent on what we decide in the
next patch, but I will take a look through the pahole output. Thanks!
Allison
fs/xfs/libxfs/xfs_da_btree.h | 23 +++++++++++++++++++++++
fs/xfs/scrub/common.c | 2 ++
fs/xfs/xfs_acl.c | 2 ++
fs/xfs/xfs_attr_list.c | 1 +
fs/xfs/xfs_ioctl.c | 2 ++
fs/xfs/xfs_ioctl32.c | 2 ++
fs/xfs/xfs_iops.c | 2 ++
fs/xfs/xfs_xattr.c | 1 +
8 files changed, 35 insertions(+)
diff --git a/fs/xfs/libxfs/xfs_da_btree.h b/fs/xfs/libxfs/xfs_da_btree.h
index bed4f40..ebe1295 100644
--- a/fs/xfs/libxfs/xfs_da_btree.h
+++ b/fs/xfs/libxfs/xfs_da_btree.h
@@ -42,6 +42,28 @@ enum xfs_dacmp {
XFS_CMP_CASE /* names are same but differ in case */
};
+#define XFS_DC_INIT 0x01 /* Init delay info */
+#define XFS_DC_FOUND_LBLK 0x02 /* We found leaf blk for attr */
+#define XFS_DC_FOUND_NBLK 0x04 /* We found node blk for attr */
+#define XFS_DC_ALLOC_LEAF 0x08 /* We are allocating leaf blocks */
+#define XFS_DC_ALLOC_NODE 0x10 /* We are allocating node blocks */
+#define XFS_DC_RM_LEAF_BLKS 0x20 /* We are removing leaf blocks */
+#define XFS_DC_RM_NODE_BLKS 0x40 /* We are removing node blocks */
+
+/*
+ * Context used for keeping track of delayed attribute operations
+ */
+struct xfs_delay_context {
+ unsigned int flags;
+ struct xfs_buf *leaf_bp;
+ struct xfs_bmbt_irec map;
+ xfs_dablk_t lblkno;
+ xfs_fileoff_t lfileoff;
+ int blkcnt;
+ struct xfs_da_state *state;
+ struct xfs_da_state_blk *blk;
+};
+
The mixed size of the various fields leaves some holes in the structure.
See 'pahole xfs.ko' output for how this struct could be reordered to
reduce the overall size a bit..
Brian
/*
* Structure to ease passing around component names.
*/
@@ -69,6 +91,7 @@ typedef struct xfs_da_args {
int rmtvaluelen2; /* remote attr value length in bytes */
int op_flags; /* operation flags */
enum xfs_dacmp cmpresult; /* name compare result for lookups */
+ struct xfs_delay_context dc; /* context used for delay attr ops */
} xfs_da_args_t;
/*
diff --git a/fs/xfs/scrub/common.c b/fs/xfs/scrub/common.c
index 1887605..9a649d1 100644
--- a/fs/xfs/scrub/common.c
+++ b/fs/xfs/scrub/common.c
@@ -24,6 +24,8 @@
#include "xfs_rmap_btree.h"
#include "xfs_log.h"
#include "xfs_trans_priv.h"
+#include "xfs_da_format.h"
+#include "xfs_da_btree.h"
#include "xfs_attr.h"
#include "xfs_reflink.h"
#include "scrub/scrub.h"
diff --git a/fs/xfs/xfs_acl.c b/fs/xfs/xfs_acl.c
index f8fb6e10..4e85b38 100644
--- a/fs/xfs/xfs_acl.c
+++ b/fs/xfs/xfs_acl.c
@@ -10,6 +10,8 @@
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_inode.h"
+#include "xfs_da_format.h"
+#include "xfs_da_btree.h"
#include "xfs_attr.h"
#include "xfs_trace.h"
#include <linux/posix_acl_xattr.h>
diff --git a/fs/xfs/xfs_attr_list.c b/fs/xfs/xfs_attr_list.c
index 00758fd..467c53c 100644
--- a/fs/xfs/xfs_attr_list.c
+++ b/fs/xfs/xfs_attr_list.c
@@ -12,6 +12,7 @@
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_da_format.h"
+#include "xfs_da_btree.h"
#include "xfs_inode.h"
#include "xfs_trans.h"
#include "xfs_bmap.h"
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 626420d..2cabdc2 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -15,6 +15,8 @@
#include "xfs_iwalk.h"
#include "xfs_itable.h"
#include "xfs_error.h"
+#include "xfs_da_format.h"
+#include "xfs_da_btree.h"
#include "xfs_attr.h"
#include "xfs_bmap.h"
#include "xfs_bmap_util.h"
diff --git a/fs/xfs/xfs_ioctl32.c b/fs/xfs/xfs_ioctl32.c
index 1e08bf7..7153780 100644
--- a/fs/xfs/xfs_ioctl32.c
+++ b/fs/xfs/xfs_ioctl32.c
@@ -17,6 +17,8 @@
#include "xfs_itable.h"
#include "xfs_fsops.h"
#include "xfs_rtalloc.h"
+#include "xfs_da_format.h"
+#include "xfs_da_btree.h"
#include "xfs_attr.h"
#include "xfs_ioctl.h"
#include "xfs_ioctl32.h"
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index 469e8e2..57de5f1 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -13,6 +13,8 @@
#include "xfs_inode.h"
#include "xfs_acl.h"
#include "xfs_quota.h"
+#include "xfs_da_format.h"
+#include "xfs_da_btree.h"
#include "xfs_attr.h"
#include "xfs_trans.h"
#include "xfs_trace.h"
diff --git a/fs/xfs/xfs_xattr.c b/fs/xfs/xfs_xattr.c
index 6309da4..470e605 100644
--- a/fs/xfs/xfs_xattr.c
+++ b/fs/xfs/xfs_xattr.c
@@ -10,6 +10,7 @@
#include "xfs_log_format.h"
#include "xfs_da_format.h"
#include "xfs_inode.h"
+#include "xfs_da_btree.h"
#include "xfs_attr.h"
#include <linux/posix_acl_xattr.h>
--
2.7.4
