Hi all,
we need to run 32 Bit Linux kernels, but file identification of our RSBAC
access control system relies on unique inode numbers. Plain Ceph uses inode
number 1 for all filesystem objects, leading to id problems. To check
yourself, make a "find" and see that it complains about file system loops
because of this. ls -i shows number 1 for all items.
I changed the inode number generation as follows to get unique numbers and now
everything works fine without collisions.
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 35dc965..bb73b49 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -344,9 +344,10 @@ static inline struct ceph_vino ceph_vino(struct inode
*inode)
* x86_64+ino32 64 32
* x86_64 64 64
*/
-static inline u32 ceph_ino_to_ino32(ino_t ino)
+static inline u32 ceph_ino_to_ino32(__u64 vino)
{
- ino ^= ino >> (sizeof(ino) * 8 - 32);
+ u32 ino = vino & 0xffffffff;
+ ino ^= vino >> 32;
if (!ino)
ino = 1;
return ino;
@@ -359,9 +360,10 @@ static inline ino_t ceph_vino_to_ino(struct ceph_vino
vino)
{
ino_t ino = (ino_t)vino.ino; /* ^ (vino.snap << 20); */
#if BITS_PER_LONG == 32
- ino = ceph_ino_to_ino32(ino);
+ return ceph_ino_to_ino32(vino.ino);
+#else
+ return (ino_t)vino.ino;
#endif
- return ino;
}
Amon Ott
--
Dr. Amon Ott
m-privacy GmbH Tel: +49 30 24342334
Am Köllnischen Park 1 Fax: +49 30 24342336
10179 Berlin http://www.m-privacy.de
Amtsgericht Charlottenburg, HRB 84946
Geschäftsführer:
Dipl.-Kfm. Holger Maczkowsky,
Roman Maczkowsky
GnuPG-Key-ID: 0x2DD3A649
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