Re: [PATCH v4 04/17] xfs: Add xfs_dabuf defines

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On 11/8/19 12:19 PM, Darrick J. Wong wrote:

On Wed, Nov 06, 2019 at 06:27:48PM -0700, Allison Collins wrote:

This patch adds two new defines XFS_DABUF_MAP_NOMAPPING and
XFS_DABUF_MAP_HOLE_OK.  This helps to clean up hard numbers and
makes the code easier to read

Signed-off-by: Allison Collins <allison.henderson@xxxxxxxxxx>
---
  fs/xfs/libxfs/xfs_attr.c       | 14 +++++++-----
  fs/xfs/libxfs/xfs_attr_leaf.c  | 23 +++++++++++--------
  fs/xfs/libxfs/xfs_attr_leaf.h  |  3 +++
  fs/xfs/libxfs/xfs_da_btree.c   | 50 ++++++++++++++++++++++++++++--------------
  fs/xfs/libxfs/xfs_dir2_block.c |  6 +++--
  fs/xfs/libxfs/xfs_dir2_data.c  |  3 ++-
  fs/xfs/libxfs/xfs_dir2_leaf.c  |  9 +++++---
  fs/xfs/libxfs/xfs_dir2_node.c  | 10 +++++----
  fs/xfs/scrub/dabtree.c         |  6 ++---
  fs/xfs/scrub/dir.c             |  4 +++-
  fs/xfs/xfs_attr_inactive.c     |  6 +++--
  fs/xfs/xfs_attr_list.c         | 16 +++++++++-----
  12 files changed, 97 insertions(+), 53 deletions(-)


<snip>


diff --git a/fs/xfs/libxfs/xfs_attr_leaf.h b/fs/xfs/libxfs/xfs_attr_leaf.h
index bb08800..017480e 100644
--- a/fs/xfs/libxfs/xfs_attr_leaf.h
+++ b/fs/xfs/libxfs/xfs_attr_leaf.h
@@ -16,6 +16,9 @@ struct xfs_da_state_blk;
  struct xfs_inode;
  struct xfs_trans;
+#define XFS_DABUF_MAP_NOMAPPING (-1) /* Caller doesn't have a mapping. */ 
+#define XFS_DABUF_MAP_HOLE_OK	(-2) /* don't complain if we land in a hole. */


These are parameters to xfs_da_{get,read,reada}_buf, please put them
next to the declarations for those functions.
Hmm, I dont see that these are declared in a header file, but how about fs/xfs/libxfs/xfs_da_btree.h ? Did I miss them somewhere? 

Allison




Also they probably ought to be explicitly cast to xfs_daddr_t, e.g.

/* Force a fresh lookup for the dir/attr mapping. */
#define XFS_DABUF_MAP_NOMAPPING	((xfs_daddr_t)-1)

/* Don't complain if we land in a hole. */
#define XFS_DABUF_MAP_HOLE_OK	((xfs_daddr_t)-2)


+
  /*
   * Used to keep a list of "remote value" extents when unlinking an inode.
   */


<snip>


diff --git a/fs/xfs/libxfs/xfs_dir2_block.c b/fs/xfs/libxfs/xfs_dir2_block.c
index 8dedc30..6bc7651 100644
--- a/fs/xfs/libxfs/xfs_dir2_block.c
+++ b/fs/xfs/libxfs/xfs_dir2_block.c
@@ -20,6 +20,7 @@
  #include "xfs_error.h"
  #include "xfs_trace.h"
  #include "xfs_log.h"
+#include "xfs_attr_leaf.h"
/* 
   * Local function prototypes.
@@ -123,8 +124,9 @@ xfs_dir3_block_read(
  	struct xfs_mount	*mp = dp->i_mount;
  	int			err;
- err = xfs_da_read_buf(tp, dp, mp->m_dir_geo->datablk, -1, bpp, 
-				XFS_DATA_FORK, &xfs_dir3_block_buf_ops);
+	err = xfs_da_read_buf(tp, dp, mp->m_dir_geo->datablk,
+			      XFS_DABUF_MAP_NOMAPPING, bpp, XFS_DATA_FORK,
+			      &xfs_dir3_block_buf_ops);
  	if (!err && tp && *bpp)
  		xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_DIR_BLOCK_BUF);
  	return err;


I think this misses the xfs_dir3_data_read call in
xfs_dir2_leaf_to_block?


diff --git a/fs/xfs/libxfs/xfs_dir2_data.c b/fs/xfs/libxfs/xfs_dir2_data.c
index 2c79be4..a4188de 100644
--- a/fs/xfs/libxfs/xfs_dir2_data.c
+++ b/fs/xfs/libxfs/xfs_dir2_data.c
@@ -17,6 +17,7 @@
  #include "xfs_trans.h"
  #include "xfs_buf_item.h"
  #include "xfs_log.h"
+#include "xfs_attr_leaf.h"
static xfs_failaddr_t xfs_dir2_data_freefind_verify( 
  		struct xfs_dir2_data_hdr *hdr, struct xfs_dir2_data_free *bf,
@@ -653,7 +654,7 @@ xfs_dir3_data_init(
  	 * Get the buffer set up for the block.
  	 */
  	error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(args->geo, blkno),
-			       -1, &bp, XFS_DATA_FORK);
+			       XFS_DABUF_MAP_NOMAPPING, &bp, XFS_DATA_FORK);
  	if (error)
  		return error;
  	bp->b_ops = &xfs_dir3_data_buf_ops;
diff --git a/fs/xfs/libxfs/xfs_dir2_leaf.c b/fs/xfs/libxfs/xfs_dir2_leaf.c
index b7046e2..a2cba6bd 100644
--- a/fs/xfs/libxfs/xfs_dir2_leaf.c
+++ b/fs/xfs/libxfs/xfs_dir2_leaf.c
@@ -19,6 +19,7 @@
  #include "xfs_trace.h"
  #include "xfs_trans.h"
  #include "xfs_buf_item.h"
+#include "xfs_attr_leaf.h"
/* 
   * Local function declarations.
@@ -311,7 +312,7 @@ xfs_dir3_leaf_get_buf(
  	       bno < xfs_dir2_byte_to_db(args->geo, XFS_DIR2_FREE_OFFSET));
error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(args->geo, bno), 
-			       -1, &bp, XFS_DATA_FORK);
+			       XFS_DABUF_MAP_NOMAPPING, &bp, XFS_DATA_FORK);
  	if (error)
  		return error;
@@ -594,7 +595,8 @@ xfs_dir2_leaf_addname( trace_xfs_dir2_leaf_addname(args); - error = xfs_dir3_leaf_read(tp, dp, args->geo->leafblk, -1, &lbp); 
+	error = xfs_dir3_leaf_read(tp, dp, args->geo->leafblk,
+				   XFS_DABUF_MAP_NOMAPPING, &lbp);
  	if (error)
  		return error;


I think there are some missing conversions for xfs_dir3_data_read calls
in xfs_dir2_leaf_addname...


@@ -1189,7 +1191,8 @@ xfs_dir2_leaf_lookup_int(
  	tp = args->trans;
  	mp = dp->i_mount;
- error = xfs_dir3_leaf_read(tp, dp, args->geo->leafblk, -1, &lbp); 
+	error = xfs_dir3_leaf_read(tp, dp, args->geo->leafblk,
+				   XFS_DABUF_MAP_NOMAPPING, &lbp);
  	if (error)
  		return error;


...and two more dir3_leaf_read calls further down in this function...

...and one more in xfs_dir2_leaf_trim_data...


diff --git a/fs/xfs/libxfs/xfs_dir2_node.c b/fs/xfs/libxfs/xfs_dir2_node.c
index 8bbd742..0a803e4 100644
--- a/fs/xfs/libxfs/xfs_dir2_node.c
+++ b/fs/xfs/libxfs/xfs_dir2_node.c
@@ -20,6 +20,7 @@
  #include "xfs_trans.h"
  #include "xfs_buf_item.h"
  #include "xfs_log.h"
+#include "xfs_attr_leaf.h"
/* 
   * Function declarations.
@@ -227,7 +228,7 @@ xfs_dir2_free_read(
  	xfs_dablk_t		fbno,
  	struct xfs_buf		**bpp)
  {
-	return __xfs_dir3_free_read(tp, dp, fbno, -1, bpp);
+	return __xfs_dir3_free_read(tp, dp, fbno, XFS_DABUF_MAP_NOMAPPING, bpp);
  }
static int 
@@ -237,7 +238,7 @@ xfs_dir2_free_try_read(
  	xfs_dablk_t		fbno,
  	struct xfs_buf		**bpp)
  {
-	return __xfs_dir3_free_read(tp, dp, fbno, -2, bpp);
+	return __xfs_dir3_free_read(tp, dp, fbno, XFS_DABUF_MAP_HOLE_OK, bpp);
  }
static int 
@@ -254,7 +255,7 @@ xfs_dir3_free_get_buf(
  	struct xfs_dir3_icfree_hdr hdr;
error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(args->geo, fbno), 
-				   -1, &bp, XFS_DATA_FORK);
+				   XFS_DABUF_MAP_NOMAPPING, &bp, XFS_DATA_FORK);
  	if (error)
  		return error;


...there's also a missing call in xfs_dir2_leafn_lookup_for_entry...


@@ -1495,7 +1496,8 @@ xfs_dir2_leafn_toosmall(
  		 * Read the sibling leaf block.
  		 */
  		error = xfs_dir3_leafn_read(state->args->trans, dp,
-					    blkno, -1, &bp);
+					    blkno, XFS_DABUF_MAP_NOMAPPING,
+					    &bp);
  		if (error)
  			return error;


...and another one in xfs_dir2_node_addname_int.


diff --git a/fs/xfs/scrub/dabtree.c b/fs/xfs/scrub/dabtree.c
index 77ff9f9..353455c 100644
--- a/fs/xfs/scrub/dabtree.c
+++ b/fs/xfs/scrub/dabtree.c
@@ -355,9 +355,9 @@ xchk_da_btree_block(
  		goto out_nobuf;
/* Read the buffer. */ 
-	error = xfs_da_read_buf(dargs->trans, dargs->dp, blk->blkno, -2,
-			&blk->bp, dargs->whichfork,
-			&xchk_da_btree_buf_ops);
+	error = xfs_da_read_buf(dargs->trans, dargs->dp, blk->blkno,
+				XFS_DABUF_MAP_HOLE_OK, &blk->bp,
+				dargs->whichfork, &xchk_da_btree_buf_ops);
  	if (!xchk_da_process_error(ds, level, &error))
  		goto out_nobuf;
  	if (blk->bp)
diff --git a/fs/xfs/scrub/dir.c b/fs/xfs/scrub/dir.c
index 1e2e117..eb0fa0f 100644
--- a/fs/xfs/scrub/dir.c
+++ b/fs/xfs/scrub/dir.c
@@ -18,6 +18,7 @@
  #include "scrub/scrub.h"
  #include "scrub/common.h"
  #include "scrub/dabtree.h"
+#include "xfs_attr_leaf.h"
/* Set us up to scrub directories. */ 
  int


I also noticed missing conversions for xfs_dir3_data_read in
xchk_dir_rec, xchk_directory_data_bestfree,
xchk_directory_leaf1_bestfree, and xchk_directory_free_bestfree.


@@ -492,7 +493,8 @@ xchk_directory_leaf1_bestfree(
  	int				error;
/* Read the free space block. */ 
-	error = xfs_dir3_leaf_read(sc->tp, sc->ip, lblk, -1, &bp);
+	error = xfs_dir3_leaf_read(sc->tp, sc->ip, lblk,
+				   XFS_DABUF_MAP_NOMAPPING, &bp);
  	if (!xchk_fblock_process_error(sc, XFS_DATA_FORK, lblk, &error))
  		goto out;
  	xchk_buffer_recheck(sc, bp);


There's also a missing xfs_dir3_data_readahead conversion in
xchk_parent_count_parent_dentries in fs/xfs/scrub/parent.c.


diff --git a/fs/xfs/xfs_attr_inactive.c b/fs/xfs/xfs_attr_inactive.c
index f83f11d..9c22915 100644
--- a/fs/xfs/xfs_attr_inactive.c
+++ b/fs/xfs/xfs_attr_inactive.c
@@ -235,7 +235,8 @@ xfs_attr3_node_inactive(
  		 * traversal of the tree so we may deal with many blocks
  		 * before we come back to this one.
  		 */
-		error = xfs_da3_node_read(*trans, dp, child_fsb, -1, &child_bp,
+		error = xfs_da3_node_read(*trans, dp, child_fsb,
+					  XFS_DABUF_MAP_NOMAPPING, &child_bp,
  					  XFS_ATTR_FORK);
  		if (error)
  			return error;
@@ -321,7 +322,8 @@ xfs_attr3_root_inactive(
  	 * the extents in reverse order the extent containing
  	 * block 0 must still be there.
  	 */
-	error = xfs_da3_node_read(*trans, dp, 0, -1, &bp, XFS_ATTR_FORK);
+	error = xfs_da3_node_read(*trans, dp, 0, XFS_DABUF_MAP_NOMAPPING, &bp,
+				  XFS_ATTR_FORK);
  	if (error)
  		return error;
  	blkno = bp->b_bn;
diff --git a/fs/xfs/xfs_attr_list.c b/fs/xfs/xfs_attr_list.c
index c02f22d..fab416c 100644
--- a/fs/xfs/xfs_attr_list.c
+++ b/fs/xfs/xfs_attr_list.c
@@ -224,8 +224,9 @@ xfs_attr_node_list_lookup(
  	ASSERT(*pbp == NULL);
  	cursor->blkno = 0;
  	for (;;) {
-		error = xfs_da3_node_read(tp, dp, cursor->blkno, -1, &bp,
-				XFS_ATTR_FORK);
+		error = xfs_da3_node_read(tp, dp, cursor->blkno,
+					  XFS_DABUF_MAP_NOMAPPING, &bp,
+					  XFS_ATTR_FORK);
  		if (error)
  			return error;
  		node = bp->b_addr;
@@ -309,8 +310,9 @@ xfs_attr_node_list(
  	 */
  	bp = NULL;
  	if (cursor->blkno > 0) {
-		error = xfs_da3_node_read(context->tp, dp, cursor->blkno, -1,
-					      &bp, XFS_ATTR_FORK);
+		error = xfs_da3_node_read(context->tp, dp, cursor->blkno,
+					  XFS_DABUF_MAP_NOMAPPING, &bp,
+					  XFS_ATTR_FORK);
  		if ((error != 0) && (error != -EFSCORRUPTED))
  			return error;
  		if (bp) {
@@ -377,7 +379,8 @@ xfs_attr_node_list(
  			break;
  		cursor->blkno = leafhdr.forw;
  		xfs_trans_brelse(context->tp, bp);
-		error = xfs_attr3_leaf_read(context->tp, dp, cursor->blkno, -1, &bp);
+		error = xfs_attr3_leaf_read(context->tp, dp, cursor->blkno,
+					    XFS_DABUF_MAP_NOMAPPING, &bp);
  		if (error)
  			return error;
  	}
@@ -497,7 +500,8 @@ xfs_attr_leaf_list(xfs_attr_list_context_t *context)
  	trace_xfs_attr_leaf_list(context);
context->cursor->blkno = 0; 
-	error = xfs_attr3_leaf_read(context->tp, context->dp, 0, -1, &bp);
+	error = xfs_attr3_leaf_read(context->tp, context->dp, 0,
+				    XFS_DABUF_MAP_NOMAPPING, &bp);
  	if (error)
  		return error;


...more missing conversions of xfs_dir3_data_read in
xfs_dir2_leaf_readbuf; and of xfs_dir3_data_readahead in
xfs_dir2_leaf_readbuf...

...and a missing conversion of xfs_dir3_data_readahead in xfs_dir_open
in fs/xfs/xfs_file.c.

--D


--
2.7.4
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