Support HFS+ not filling its device completely

PATCH New Vladimir 'φ-coder/phcoder' Serbinenko 1 participant 1 message Jun 1, 2012

Subsystems (2)

VFS Hfsplus filesystem

lore

Share & tools

lore

Vladimir 'φ-coder/phcoder' Serbinenko

author

2012-06-01 01:00 UTC #0 lore raw

PATCH 1/1 Support HFS+ not filling its device completely

Hello, all. My HFS+ previously was on slightly smaller partition and was subsequently dd'ed to its current location. Mac OS X doesn't mind and I don't mind losing a little space. However Linux fails to locate second superblock and hence to mount it. This patch uses the size field from the first superblock to locate the second.

Signed-off-by Vladimir Serbinenko <[email protected]>

---
 fs/hfsplus/wrapper.c |    3 +++
 1 file changed, 3 insertions(+)

fs/hfsplus/wrapper.c +3 -0

index 7daf4b8..a7e1268 100644
@@ -206,6 +206,9 @@ reread:
 		set_bit(HFSPLUS_SB_HFSX, &sbi->flags);
 		/*FALLTHRU*/
 	case cpu_to_be16(HFSPLUS_VOLHEAD_SIG):
+		part_size = (((u64) be32_to_cpu(sbi->s_vhdr->blocksize)
+			      * (u64) be32_to_cpu(sbi->s_vhdr->total_blocks))
+			     >> HFSPLUS_SECTOR_SHIFT);
 		break;
 	case cpu_to_be16(HFSP_WRAP_MAGIC):
 		if (!hfsplus_read_mdb(sbi->s_vhdr, &wd))

Signature · 5 lines

1.7.10

-- 
Regards
Vladimir 'φ-coder/phcoder' Serbinenko