File mdadm-2.6.4-519561f7.patch of Package mdadm

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File mdadm-2.6.4-519561f7.patch of Package mdadm (Revision 289ccb3be40b31d3f7716e2b67f8d921)

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commit 519561f73f7ba987affde8b174d2691bb098439d
  Author: Neil Brown <neilb@suse.de>
  Date:   Tue Apr 29 17:13:53 2008 +1000
  
      Fix possible bug with bitmap space allocation with v1.0 metadata
      
      When adding a device to an array, make sure we don't reserve
      so much space for the bitmap that there isn't room for the data.

(minus the roff comments change)
---
 super1.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- super1.c.orig
+++ super1.c
@@ -903,7 +903,7 @@ static int write_init_super1(struct supe
 	 * for a bitmap.
 	 */
 	array_size = __le64_to_cpu(sb->size);
-	/* work out how much space we left of a bitmap */
+	/* work out how much space we left for a bitmap */
 	bm_space = choose_bm_space(array_size);
 
 	switch(st->minor_version) {
@@ -913,6 +913,8 @@ static int write_init_super1(struct supe
 		sb_offset &= ~(4*2-1);
 		sb->super_offset = __cpu_to_le64(sb_offset);
 		sb->data_offset = __cpu_to_le64(0);
+		if (sb_offset - bm_space < array_size)
+			bm_space = sb_offset - array_size;
 		sb->data_size = __cpu_to_le64(sb_offset - bm_space);
 		break;
 	case 1:

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File mdadm-2.6.4-519561f7.patch of Package mdadm (Revision 289ccb3be40b31d3f7716e2b67f8d921)

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