[PATCH 08/14 V2] xfsprogs: free resources in libxfs_alloc_file_space error paths

[Eric Sandeen]

The bmap freelist & transaction pointer weren't
being freed in libxfs_alloc_file_space error paths;
more or less copy the error handling that exists
in kernelspace to resolve this.

Signed-off-by: Eric Sandeen <sandeen at redhat.com>
---

V2: Fix comment, remove XXX :)

Although:  That ASSERT, while matching kernelspace, seems
weird.  We *can* get other errors out of xfs_trans_reserve.
EIO etc... What's the assert all about?

 libxfs/util.c |   20 +++++++++++++++++---
 1 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/libxfs/util.c b/libxfs/util.c
index 1b05540..f1aa4c6 100644
--- a/libxfs/util.c
+++ b/libxfs/util.c
@@ -582,8 +582,17 @@ libxfs_alloc_file_space(
 		resblks = (uint)XFS_DIOSTRAT_SPACE_RES(mp, datablocks);
 		error = xfs_trans_reserve(tp, &M_RES(mp)->tr_write,
 					  resblks, 0);
-		if (error)
+		/*
+		 * Check for running out of space
+		 */
+		if (error) {
+			/*
+			 * Free the transaction structure.
+			 */
+			ASSERT(error == ENOSPC);
+			xfs_trans_cancel(tp, 0);
 			break;
+		}
 		xfs_trans_ijoin(tp, ip, 0);
 		xfs_trans_ihold(tp, ip);
 
@@ -593,12 +602,12 @@ libxfs_alloc_file_space(
 				&reccount, &free_list);
 
 		if (error)
-			break;
+			goto error0;
 
 		/* complete the transaction */
 		error = xfs_bmap_finish(&tp, &free_list, &committed);
 		if (error)
-			break;
+			goto error0;
 
 		error = xfs_trans_commit(tp, 0);
 		if (error)
@@ -612,6 +621,11 @@ libxfs_alloc_file_space(
 		allocatesize_fsb -= allocated_fsb;
 	}
 	return error;
+
+error0:	/* Cancel bmap, cancel trans */
+	xfs_bmap_cancel(&free_list);
+	xfs_trans_cancel(tp, 0);
+	return error;
 }
 
 unsigned int