[7478] in Athena Bugs
AFS file link count
daemon@ATHENA.MIT.EDU (John Carr)
Sun Apr 28 14:12:31 1991
To: bugs@ATHENA.MIT.EDU, bug-afs@ATHENA.MIT.EDU
Date: Sun, 28 Apr 91 14:12:16 EDT
From: John Carr <jfc@ATHENA.MIT.EDU>
The AFS client allocates an unsigned char to hold the link count of a file.
The LinkCount field of struct mstat should be an unsigned short. The AFS
server and the rest of the kernel allow 16 bit link counts. A file with 256
links appears to have 0 links according to ls.
$ ls file.252
-rw-rw-r--255 jfc 2 Apr 28 14:04 file.252
$ ln file.252 file.253
$ ls file.253
-rw-rw-r-- 0 jfc 2 Apr 28 14:04 file.253
$ rm file.253
$ ls file.252
-rw-rw-r--255 jfc 2 Apr 28 14:04 file.252
$
I don't understand why a char instead of a short was used -- on any machine
which aligns longs to 2 byte boundaries, the structure will be no smaller.
