and we need to add 1 to it to get the size of the LUN.
Revert Max LBA calculation when returning the Maximum LBA from the target
to the iinitiator, following an email conversation with Jonathan Kollasch,
who points out a number of things:
+ the NetBSD scsipi driver reads the value returned by the drive and adds
one to it, so that standard SCSI drives return the 0-based Max LBA in a
READ CAPACITY command.
+ it is up to the initiator to add 1 to the Max LBA to find out the size
of the LUN (Jonathan verified this by using the UNH iSCSI initiator on
to a NetBSD target)
+ an analogous change to the NetBSD target (revision 1.34 of
disk.c) is needed.
libpuffs.
With a round of applause to Antti Kantee for helping out with puffs
debugging, and a huge thank you to Greg Oster, who has fixed numerous
bugs over the last week (unfortunately, the bugs are all mine), and
provided enthusiasm and drive.
Right now, the initiator is fulling working for only a single target,
and should be considered to be in a state of flux. Having said that,
Greg completed a run of build.sh with the storage on the iSCSI target,
and found times to be within 0.5% of direct attached storage. Cache
effects apply.
The initiator should be portable to everything that uses the FUSE
interface. That's right - a portable iSCSI initiator.
Storage (LUNs exported by the target) is, at the present time,
presented as a regular file called "storage". This will likely
change in the future.
% priv obj/iscsifs -u agc inspiron1300 /mnt &
[1] 13158
inspiron1300.wherever.co.uk: 10.4.0.42:3260,1 iqn.1994-04.org.netbsd.iscsi-target:target0
inspiron1300.wherever.co.uk: 10.4.0.42:3260,1 iqn.1994-04.org.netbsd.iscsi-target:target1
% ls -al /mnt/inspiron1300.wherever.co.uk/target0/
total 576
drwxr-xr-x 2 agc agc 512 Nov 8 21:07 .
drwxr-xr-x 2 agc agc 512 Nov 8 21:07 ..
lrw-r--r-- 1 agc agc 44 Nov 8 21:07 hostname -> inspiron1300.wherever.co.uk
lrw-r--r-- 1 agc agc 9 Nov 8 21:07 ip -> 10.4.0.42
lrw-r--r-- 1 agc agc 16 Nov 8 21:07 product -> NetBSD iSCSI
-rw-r--r-- 1 agc agc 104857088 Nov 8 21:07 storage
lrw-r--r-- 1 agc agc 43 Nov 8 21:07 targetname -> iqn.1994-04.org.netbsd.iscsi-target:target0
lrw-r--r-- 1 agc agc 8 Nov 8 21:07 vendor -> NetBSD
lrw-r--r-- 1 agc agc 4 Nov 8 21:07 version -> 0
FFS needs a block device, and so vnconfig can be used to sit on top of
the regular file.
% mount -vv | grep iscsifs
/dev/puffs on /mnt type puffs|refuse:iscsifs (nosuid, nodev, fsid: 0xcb04/0x6acb, reads: sync 0 async 0, writes: sync 0 async 0)
% priv vnconfig vnd0 /mnt/inspiron1300.wherever.co.uk/target0/storage
% priv mount /dev/vnd0a /iscsi
% df
Filesystem 1K-blocks Used Avail %Cap Mounted on
/dev/dk0 28101396 21491182 5205146 80% /
kernfs 1 1 0 100% /kern
procfs 4 4 0 100% /proc
ptyfs 1 1 0 100% /dev/pts
/dev/puffs 0 0 0 100% /mnt
/dev/vnd0a 99214 8209 86045 8% /iscsi
% mount -vv | grep iscsi
/dev/puffs on /mnt type puffs|refuse:iscsifs (nosuid, nodev, fsid: 0xcb04/0x6acb, reads: sync 0 async 0, writes: sync 0 async 0)
/dev/vnd0a on /iscsi type ffs (local, fsid: 0xe00/0x78b, reads: sync 1 async 0, writes: sync 2 async 0)
servers. Calling daemon() (i.e. fork()ing) inside a library can
cause nice surprises for e.g. threaded programs. As discussed with
Greg Oster & others.
avoid wasting unbelievable amounts of memory, set the blocksize to
something more believable. Should fix the memset-part to act only
up to the size the file is extended to, though.
This utility uses FreeBSD's libfetch (updated for NetBSD, and to quieten
lint) to provide a BSD-licensed ftp/http/https file system similar to the
old alex utility. The full URL is used as the path underneath the "/ian"
mountpoint.
Sample use as follows:
[19:09:38] agc@inspiron1300 ...examples/refuse/ian 126 > priv ian/obj/ian /ian
[19:09:55] agc@inspiron1300 ...examples/refuse/ian 127 > cat /ian/ftp://localhost/motd
NetBSD 4.99.27 (INSPIRON) #4: Tue Aug 7 13:04:33 BST 2007
Welcome to NetBSD!
This system is running a development snapshot of the NetBSD operating system,
also known as NetBSD-current. It is highly possible for it to contain serious
bugs, regressions, broken features or other problems. Please bear this in mind
and use the system with care.
You are encouraged to test this version as thoroughly as possible. Should you
encounter any problem, please report it back to the development team using the
send-pr(1) utility (requires a working MTA). If yours is not properly set up,
use the web interface at: http://www.netbsd.org/support/send-pr.html
Thank you for helping us test and improve NetBSD.
[19:10:17] agc@inspiron1300 ...examples/refuse/ian 128 > df
Filesystem 1K-blocks Used Avail %Cap Mounted on
/dev/dk0 28101396 19491972 7204356 73% /
kernfs 1 1 0 100% /kern
procfs 4 4 0 100% /proc
ptyfs 1 1 0 100% /dev/pts
/dev/puffs 0 0 0 100% /ian
[19:10:21] agc@inspiron1300 ...examples/refuse/ian 129 > ls -al /ian/ftp://localhost/motd
-rw------- 1 root wheel 705 Aug 28 19:10 /ian/ftp://localhost/motd
[19:10:42] agc@inspiron1300 ...examples/refuse/ian 130 > ls -al ~ftp/motd
-rw-r--r-- 1 ftp ftp 705 Aug 27 21:33 /home/ftp/motd
[19:10:53] agc@inspiron1300 ...examples/refuse/ian 131 >
