[PATCH v4 06/17] xfs: Factor out new helper functions xfs_attr_rmtval_set

Allison Collins
2019-11-07T01:28:59Z

Break xfs_attr_rmtval_set into two helper functions
xfs_attr_rmt_find_hole and xfs_attr_rmtval_set_value.
xfs_attr_rmtval_set rolls the transaction between the
helpers, but delayed operations cannot. We will use
the helpers later when constructing new delayed
attribute routines.

Signed-off-by: Allison Collins <allison.henderson@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
---
fs/xfs/libxfs/xfs_attr_remote.c | 71 +++++++++++++++++++++++++++++++----------
fs/xfs/libxfs/xfs_attr_remote.h | 3 +-
2 files changed, 56 insertions(+), 18 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_attr_remote.c b/fs/xfs/libxfs/xfs_attr_remote.c
index db9247a..db51388 100644
--- a/fs/xfs/libxfs/xfs_attr_remote.c
+++ b/fs/xfs/libxfs/xfs_attr_remote.c
@@ -21,6 +21,7 @@
#include "xfs_attr.h"
#include "xfs_trace.h"
#include "xfs_error.h"
+#include "xfs_attr_remote.h"

#define ATTR_RMTVALUE_MAPSIZE 1 /* # of map entries at once */

@@ -432,34 +433,20 @@ xfs_attr_rmtval_set(
struct xfs_da_args *args)
{
struct xfs_inode *dp = args->dp;
- struct xfs_mount *mp = dp->i_mount;
struct xfs_bmbt_irec map;
xfs_dablk_t lblkno;
- xfs_fileoff_t lfileoff = 0;
- uint8_t *src = args->value;
int blkcnt;
- int valuelen;
int nmap;
int error;
- int offset = 0;

trace_xfs_attr_rmtval_set(args);

- /*
- * Find a "hole" in the attribute address space large enough for
- * us to drop the new attribute's value into. Because CRC enable
- * attributes have headers, we can't just do a straight byte to FSB
- * conversion and have to take the header space into account.
- */
- blkcnt = xfs_attr3_rmt_blocks(mp, args->rmtvaluelen);
- error = xfs_bmap_first_unused(args->trans, args->dp, blkcnt, &lfileoff,
- XFS_ATTR_FORK);
+ error = xfs_attr_rmt_find_hole(args);
if (error)
return error;

- args->rmtblkno = lblkno = (xfs_dablk_t)lfileoff;
- args->rmtblkcnt = blkcnt;
-
+ blkcnt = args->rmtblkcnt;
+ lblkno = (xfs_dablk_t)args->rmtblkno;
/*
* Roll through the "value", allocating blocks on disk as required.
*/
@@ -500,6 +487,56 @@ xfs_attr_rmtval_set(
return error;
}

+ return xfs_attr_rmtval_set_value(args);
+}
+
+
+/*
+ * Find a "hole" in the attribute address space large enough for us to drop the
+ * new attribute's value into
+ */
+int
+xfs_attr_rmt_find_hole(
+ struct xfs_da_args *args)
+{
+ struct xfs_inode *dp = args->dp;
+ struct xfs_mount *mp = dp->i_mount;
+ int error;
+ int blkcnt;
+ xfs_fileoff_t lfileoff = 0;
+
+ /*
+ * Because CRC enable attributes have headers, we can't just do a
+ * straight byte to FSB conversion and have to take the header space
+ * into account.
+ */
+ blkcnt = xfs_attr3_rmt_blocks(mp, args->rmtvaluelen);
+ error = xfs_bmap_first_unused(args->trans, args->dp, blkcnt, &lfileoff,
+ XFS_ATTR_FORK);
+ if (error)
+ return error;
+
+ args->rmtblkno = (xfs_dablk_t)lfileoff;
+ args->rmtblkcnt = blkcnt;
+
+ return 0;
+}
+
+int
+xfs_attr_rmtval_set_value(
+ struct xfs_da_args *args)
+{
+ struct xfs_inode *dp = args->dp;
+ struct xfs_mount *mp = dp->i_mount;
+ struct xfs_bmbt_irec map;
+ xfs_dablk_t lblkno;
+ uint8_t *src = args->value;
+ int blkcnt;
+ int valuelen;
+ int nmap;
+ int error;
+ int offset = 0;
+
/*
* Roll through the "value", copying the attribute value to the
* already-allocated blocks. Blocks are written synchronously
diff --git a/fs/xfs/libxfs/xfs_attr_remote.h b/fs/xfs/libxfs/xfs_attr_remote.h
index 9d20b66..cd7670d 100644
--- a/fs/xfs/libxfs/xfs_attr_remote.h
+++ b/fs/xfs/libxfs/xfs_attr_remote.h
@@ -11,5 +11,6 @@ int xfs_attr3_rmt_blocks(struct xfs_mount *mp, int attrlen);
int xfs_attr_rmtval_get(struct xfs_da_args *args);
int xfs_attr_rmtval_set(struct xfs_da_args *args);
int xfs_attr_rmtval_remove(struct xfs_da_args *args);
-
+int xfs_attr_rmtval_set_value(struct xfs_da_args *args);
+int xfs_attr_rmt_find_hole(struct xfs_da_args *args);
#endif /* __XFS_ATTR_REMOTE_H__ */
--
2.7.4