Pedro Martelletto wrote:
Specifically, what is the data pointer/length field in buf
structs? Looking at sys/buf.h, it appears that b_un.b_addr is the
data pointer, and b_bcount is the length.
You're right.
Thank you :)
Trying to trace system calls to confirm my suspicion, I become
catatonic at the amount of indirection inherent in the VFS code.
You took the most difficult path :-) Just look at getblk() and
allocbuf() in vfs_bio.c and this should be clear.
If anything's worth doing, it's worth doing the hard way :)
- Bret
-p.
