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path: root/drivers/scsi/iscsi_tcp.c
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2008-01-11[SCSI] iscsi_tcp: fix setting of r2tMike Christie
If we negotiate for X r2ts we have to use only X r2ts. We cannot round up (we could send less though). It is ok to fail if it is not something the driver can handle, so this patch just does that. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-11[SCSI] iscsi_tcp: hold lock during data rsp processingMike Christie
iscsi_data_rsp needs to hold the sesison lock when it calls iscsi_update_cmdsn. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-11[SCSI] iscsi_tcp: enable sg chainingMike Christie
The previous patches converted iscsi_tcp to support sg chaining. This patch sets the proper flags and sets sg_table size to 4096. This allows fs io to be capped at max_sectors, but passthrough IO to be limited by some other part of the kernel. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-11[SCSI] iscsi_tcp: drop session when itt does not match any commandMike Christie
A target should never send us a itt that does not match a running task. If it does we do not really know what is coming down after the header, unless we evaluate the hdr and do some guessing sometimes. However, even if we know what is coming we probably do not have buffers for it or we cannot respond (if it is a r2t for example), so just drop the session. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-11[SCSI] iscsi_tcp: stop leaking r2t_info's when the incoming R2T is badOlaf Kirch
iscsi_r2t_rsp checks the incoming R2T for sanity, and if it thinks it's fishy, it will drop it silently. In this case, we leaked an r2t_info object. If we do this often enough, we run into a BUG_ON some time later. Removed r2t wrappers and update patch by Mike Christie Signed-off-by: Olaf Kirch <olaf.kirch@oracle.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-11[SCSI] iscsi: convert xmit path to iscsi chunksOlaf Kirch
Convert xmit to iscsi chunks. from michaelc@cs.wisc.edu: Bug fixes, more digest integration, sg chaining conversion and other sg wrapper changes, coding style sync up, and removal of io fields, like pdu_sent, that are not needed. Signed-off-by: Olaf Kirch <olaf.kirch@oracle.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-11[SCSI] libiscsi: fix nop handlingMike Christie
During root boot and shutdown the target could send us nops. At this time iscsid cannot be running, so the target will drop the session and the boot or shutdown will hang. To handle this and allow us to better control when to check the network this patch moves the nop handling to the kernel. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-11[SCSI] libiscsi: do not block session during logoutMike Christie
There is not need to block the session during logout. Since we are going to fail the commands that were blocked just fail them immediately instead. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-11[SCSI] libiscsi, iscsi_tcp: iscsi pool cleanupOlaf Kirch
iscsi_pool_init simplified iscsi_pool_init currently has a lot of duplicate kfree() calls it does when some allocation fails. This patch simplifies the code a little by using iscsi_pool_free to tear down the pool in case of an error. iscsi_pool_init also returns a copy of the item array to the caller. Not all callers use this array, so we make it optional. Instead of allocating a second array and return that, allocate just one array, of twice the size. Update users of iscsi_pool_{init,free} This patch drops the (now useless) second argument to iscsi_pool_free, and updates all callers. It also removes the ctask->r2ts array, which was never used anyway. Since the items argument to iscsi_pool_init is now optional, we can pass NULL instead. Signed-off-by: Olaf Kirch <olaf.kirch@oracle.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-11[SCSI] iscsi_tcp, libiscsi: initial AHS SupportBoaz Harrosh
at libiscsi generic code - currently code assumes a storage space of pdu header is allocated at llds ctask and is pointed to by iscsi_cmd_task->hdr. Here I add a hdr_max field pertaining to that storage, and an hdr_len that accumulates the current use of the pdu-header. - Add an iscsi_next_hdr() inline which returns the next free space to write new Header at. Also iscsi_next_hdr() is used to retrieve the address at which to write the header-digest. - Add iscsi_add_hdr(length). What the user do is calls iscsi_next_hdr() for address of the new header, than calls iscsi_add_hdr(length) with the size of the new header. iscsi_add_hdr() will check if space is available and update to the new size. length must be padded according to standard. - Add 2 padding inline helpers thanks to Olaf. Current patch does not use them but Following patches will. Also moved definition of ISCSI_PAD_LEN to iscsi_proto.h which had PAD_WORD_LEN that was never used anywhere. - Let iscsi_prep_scsi_cmd_pdu() signal an Error return since now it is possible that it will fail. - I was tired of yet again writing a "this is a digest" comment next to sizeof(__u32) so I defined a new ISCSI_DIGEST_SIZE. Now I don't need any comments. Changed all places that used sizeof(__u32) or "4" in connection to a digest. iscsi_tcp specific code - At struct iscsi_tcp_cmd_task allocate maximum space allowed in standard for all headers following the iscsi_cmd header. and mark it so in iscsi_tcp_session_create() - At iscsi_send_cmd_hdr() retrieve the correct headers size and write header digest at iscsi_next_hdr(). Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Olaf Kirch <olaf.kirch@oracle.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-11[SCSI] iscsi: Prettify resid handling and some extra checksBoaz Harrosh
- Check to see that OVERFLOW is not negative indicating a bug. - Unify handling of UNDERFLOW and OVERFLOW to the same code. - Also handle BIDI_OVERFLOW. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-11[SCSI] iscsi_tcp: rewrite recv pathOlaf Kirch
Rewrite recv path. Fixes: - data digest processing and error handling. - ahs support. Some fixups by Mike Christie Signed-off-by: Olaf Kirch <olaf.kirch@oracle.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-11[SCSI] libiscsi, iscsi_tcp: add device supportMike Christie
This patch adds logical unit reset support. This should work for ib_iser, but I have not finished testing that driver so it is not hooked in yet. This patch also temporarily reverts the iscsi_tcp r2t write out patch. That code is completely rewritten in this patchset. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2007-11-14[SCSI] iscsi_tcp: fix potential lockup with write commandsTony Battersby
There is a race condition in iscsi_tcp.c that may cause it to forget that it received a R2T from the target. This race may cause a data-out command (such as a write) to lock up. The race occurs here: static int iscsi_send_unsol_pdu(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) { struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data; int rc; if (tcp_ctask->xmstate & XMSTATE_UNS_HDR) { BUG_ON(!ctask->unsol_count); tcp_ctask->xmstate &= ~XMSTATE_UNS_HDR; <---- RACE ... static int iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) { ... tcp_ctask->xmstate |= XMSTATE_SOL_HDR_INIT; <---- RACE ... While iscsi_xmitworker() (called from scsi_queue_work()) is preparing to send unsolicited data, iscsi_tcp_data_recv() (called from tcp_read_sock()) interrupts it upon receipt of a R2T from the target. Both contexts do read-modify-write of tcp_ctask->xmstate. Usually, gcc on x86 will make &= and |= atomic on UP (not guaranteed of course), but in this case iscsi_send_unsol_pdu() reads the value of xmstate before clearing the bit, which causes gcc to read xmstate into a CPU register, test it, clear the bit, and then store it back to memory. If the recv interrupt happens during this sequence, then the XMSTATE_SOL_HDR_INIT bit set by the recv interrupt will be lost, and the R2T will be forgotten. The patch below (against 2.6.24-rc1) converts accesses of xmstate to use set_bit, clear_bit, and test_bit instead of |= and &=. I have tested this patch and verified that it fixes the problem. Another possible approach would be to hold a lock during most of the rx/tx setup and post-processing, and drop the lock only for the actual rx/tx. Signed-off-by: Tony Battersby <tonyb@cybernetics.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2007-10-27[CRYPTO] users: Fix up scatterlist conversion errorsHerbert Xu
This patch fixes the errors made in the users of the crypto layer during the sg_init_table conversion. It also adds a few conversions that were missing altogether. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-24SG: Change sg_set_page() to take length and offset argumentJens Axboe
Most drivers need to set length and offset as well, so may as well fold those three lines into one. Add sg_assign_page() for those two locations that only needed to set the page, where the offset/length is set outside of the function context. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-10-22[SG] Update drivers to use sg helpersJens Axboe
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-07-27[SCSI] iscsi_tcp: Turn off bounce buffersMike Christie
It was found by LSI that on setups with large amounts of memory we were bouncing buffers when we did not need to. If the iscsi tcp code touches the data buffer (or a helper does), it will kmap the buffer. iscsi_tcp also does not interact with hardware, so it does not have any hw dma restrictions. This patch sets the bounce buffer settings for our device queue so buffers should not be bounced because of a driver limit. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-27[SCSI] iscsi_tcp, ib_iser Enable module refcounting for iscsi host templateMike Christie
This prevents the iscsi modules from being unloaded while there are active mounts from an iscsi target. Signed-off-by: Olaf Kirch <olaf.kirch@oracle.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-07-20Fix buggered kmalloc() call argument orderAl Viro
Wrong order of arguments Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-06-17[SCSI] iscsi_tcp: convert to use the data buffer accessorsFUJITA Tomonori
- remove the unnecessary map_single path. - convert to use the new accessors for the sg lists and the parameters. TODO: use scsi_for_each_sg(). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-06-02[SCSI] iscsi class, iscsi_tcp, iser, qla4xxx: add netdevname sysfs attrMike Christie
iSCSI must support software iscsi (iscsi_tcp, iser), hardware iscsi (qla4xxx), and partial offload (broadcom). To be able to allow each stack or driver or port (virtual or physical) to be able to log into the same target portal we use the initiator tuple [[HWADDRESS | NETDEVNAME], INITIATOR_NAME] and the target tuple [TARGETNAME, CONN_ADDRESS, CONN_PORT] to id a session. This patch adds the netdev name, which is used by software iscsi when it binds a session to a netdevice using the SO_BINDTODEVICE sock opt. It cannot use HWADDRESS because if someone did vlans then the same netdevice will have the same mac and the initiator,target id will not be unique. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Cc: Roland Dreier <rdreier@cisco.com> Cc: David C Somayajulu <david.somayajulu@qlogic.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-06-02[SCSI] iscsi class, qla4xxx, iscsi_tcp: export local addressMike Christie
This patch exports the local address for the session. For qla4xxx this is the ip of the hba's port. For software this is the src addr of the socket. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Cc: David C Somayajulu <david.somayajulu@qlogic.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-06-02[SCSI] iscsi_tcp: fix fd leakMike Christie
This patch should fix the file descriptor leak problem. A quick look through the kernel shows that users of sockfd_lookup use sockfd_put to release their handle. We were using sock_release which from the comments and code look like it does not release the get() on the file from the lookup. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-06-02[SCSI] iscsi_tcp: remove DMA alignment restrictionMike Christie
Add a slave_configure function to iSCSI TCP to remove any DMA alignment restriction. This permits the use of direct IO from arbitrary addresses. Signed-off-by: Pete Wyckoff <pw@osc.edu> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-06-02[SCSI] iscsi_tcp: fix handling of data buffer paddingMike Christie
If we got the padding, data and header in different skbs, we were not handling the padding correctly because we attributed it to the data's skb. This resulted in the initiator reading from pad bytes + skb offset instead of the correct offset. If you could not connect with the open solaris target, this will fix the lock up problem you were hitting. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-06-02[SCSI] libiscsi: make can_queue configurableMike Christie
This patch allows us to set can_queue and cmds_per_lun from userspace when we create the session/host. From there we can set it on a per target basis. The patch fully converts iscsi_tcp, but only hooks up ib_iser for cmd_per_lun since it currently has a lots of preallocations based on can_queue. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Cc: Roland Dreier <rdreier@cisco.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-06-02[SCSI] libiscsi: fix iscsi cmdsn allocationMike Christie
The cmdsn allocation and pdu transmit code can race, and we can end up sending a pdu with cmdsn 10 before a pdu with 5. The target will then fail the connection/session. This patch fixes the problem by delaying the cmdsn allocation until we are about to send the pdu. This also removes the xmitmutex. We were using the connection xmitmutex during error handling to handle races with mtask and ctask cleanup and completion. For ctasks we now have nice refcounting and for the mtask, if we hit the case where the mtask timesout and it is floating around somewhere in the driver, we end up dropping the session. And to handle session level cleanup, we use the xmit suspend bit along with scsi_flush_queue and the session lock to make sure that the xmit thread is not possibly transmitting a task while we are trying to kill it. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Cc: Roland Dreier <rdreier@cisco.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-06-01[SCSI] iscsi tcp: fix iscsi xmit state machineMike Christie
If iscsi_tcp partially sends a header, it would recalculate the header size and readd the size of the digest (if header digests are used).This would cause us to send sizeof(digest) extra bytes when we sent the rest of the header. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-06-01[SCSI] iscsi class, iscsi_tcp, ib_iser: add sysfs chap fileMike Christie
The attached patches add sysfs files for the chap settings to the iscsi transport class, iscsi_tcp and ib_iser. This is needed for software iscsi because there are times when iscsid can die and it will need to reread the values it was using. And it is needed by qla4xxx for basic management opertaions. This patch does not hook in qla4xxx yet, because I am not sure the mbx command to use. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Cc: Roland Dreier <rdreier@cisco.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-06-01[SCSI] iscsi: Some fixes in preparation for bidirectional support - total_lengthMike Christie
- Remove shadow of request length from struct iscsi_cmd_task. - change all users to use scsi_cmnd->request_bufflen directly (With bidi we will use scsi-ml API to retrieve in/out length) Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Cc: Roland Dreier <rdreier@cisco.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-06-01[SCSI] iscsi: Some fixes in preparation for bidirectional support - exp_datasnMike Christie
This patch fixes handling of expected datasn/r2tsn as received from target. It is done according to: T10 rfc3720 section 3.2.2.3. Data Sequencing. . unify expected datasn/r2tsn into one counter . calculate than check expected datasn/r2tsn. On error print a message and fail the request. (TODO use iscsi retransmits) . remove the FIXME ;) . avoid zero length memset Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-06-01[SCSI] iscsi class, qla4xxx, iscsi_tcp, ib_iser: export/set initiator nameMike Christie
For iscsi root boot, software iscsi needs to know what the BIOS/OF initiator used for the initiator name so this puts it in sysfs for userspace to be able to pick up. For hw iscsi, it is nice to see what the card is using. This patch adds the new param, and hooks in qla4xxx, iscsi_tcp, and ib_iser. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Cc: Roland Dreier <rdreier@cisco.com> Cc: David C Somayajulu <david.somayajulu@qlogic.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-06-01[SCSI] libiscsi, iscsi_tcp, ib_iser : add sw iscsi host get/set params helpersMike Christie
iscsid and udev need to key off the hw address being used so add some helpers for iser and iscsi tcp. Also convert them Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Cc: Roland Dreier <rdreier@cisco.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-03-11[SCSI] iscsi_tcp: print useful error message when iscsi crc23c allocation failsMike Christie
People do not read the README and seem to like to unselect the crc32c module even though iscsi_tcp selects it for them. This patch spits a error that tells the user that they really do need the module. Hopefully, we will get fewer people asking about this now. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-03-11[SCSI] iscsi_tcp: increase max_sectorsMike Christie
For a while now, the block layer has seperated max sectors and max hw sectors. Software iscsi has no limit so this patch increases max hw sectors, so we can support large pass through commands. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-03-11[SCSI] iscsi: rename DEFAULT_MAX_RECV_DATA_SEGMENT_LENGTHMike Christie
This patch renames DEFAULT_MAX_RECV_DATA_SEGMENT_LENGTH to avoid confusion with the drivers default values (DEFAULT_MAX_RECV_DATA_SEGMENT_LENGTH is the iscsi RFC specific default). Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-02-09[PATCH] iscsi endianness annotationsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-01-06[SCSI] iscsi: simplify IPv6 and IPv4 address printingFUJITA Tomonori
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-01-06[SCSI] iscsi: fix crypto_alloc_hash() error checkAkinobu Mita
The return value of crypto_alloc_hash() should be checked by IS_ERR(). Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-01-06[SCSI] iscsi: fix 2.6.19 data digest calculation bugArne Redlich
The transition from crypto_digest_*() to the crypto_hash_*() family introduced a bug into the data digest calculation: crypto_hash_update() is called with the number of S/G elements instead of the S/G lists data size. Signed-off-by: Arne Redlich <arne.redlich@xiranet.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-11-10[SCSI] iscsi_tcp: fix xmittask oopsMike Christie
XMSTATE_SOL_HDR could be set when the xmit thread tests it, but there may not be anything on the r2tqueue yet. Move the XMSTATE_SOL_HDR set before the addition to the queue to make sure that when we pull something off it it is valid. This does not add locks around the xmstate test or make that a atmoic_t because this is a fast path and if it is set when we test it we can handle it there without the overhead. Later on we check the xmitqueue for all requests with the session lock so we will not miss it. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-11-10[SCSI] iscsi: always release cryptoPete Wyckoff
Unconditionally free crypto state, as it is always allocated during TCP connection creation. Without this, crypto structures leak and crc32c module refcounts grow as connections are created and destroyed. Signed-off-by: Pete Wyckoff <pw@osc.edu> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-09-23Merge mulgrave-w:git/scsi-misc-2.6James Bottomley
Conflicts: drivers/scsi/iscsi_tcp.c drivers/scsi/iscsi_tcp.h Pretty horrible merge between crypto hash consolidation and crypto_digest_...->crypto_hash_... conversion Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-09-21[SCSI] iscsi: Use crypto_hash interface instead of crypto_digestHerbert Xu
This patch converts ISCSI to use the new crypto_hash interface instead of crypto_digest. It's a fairly straightforward substitution. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2006-09-02[SCSI] iscsi_tcp: fix partial digest recvMike Christie
When a digest is spread across two network buffers, we currently ignore this and try to check the digest with the partial buffer. Or course this fails. This patch has use iscsi_tcp_copy to copy the whole digest before testing it. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-09-02[SCSI] iscsi_tcp: update header size during reloginMike Christie
When we relogin to a target, we have not yet negotiated digests so we must reset the hdr_size var. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-09-02[SCSI] iscsi_tcp: fix header resendMike Christie
This patch built over the last ones fixes a bug in the partial header resend code, where we add on another 4 bytes to the send length on the resend. We want just the header plus digest. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-09-02[SCSI] scsi_tcp: rm data rx and tx tfmsMike Christie
We currently allocated seperate tfms for data and header digests. There is no reason for this since we can never calculate a rx header and digest at the same time. Same for sends. So this patch removes the data tfms and has the send and recv sides use the rx_tfm or tx_tfm. I also made the connection creation code preallocate the tfms because I thought I hit a bug where I changed the digests settings during a relogin but could not allocate the tfm and then we just failed. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-09-02[SCSI] iscsi_tcp: fix padding, data digests, and IO at weird offsetsMike Christie
iscsi_tcp calculates padding by using the expected transfer length. This has the problem where if we have immediate data = no and initial R2T = yes, and the transfer length ended up needing padding then we send: 1. header 2. padding which should have gone after data 3. data Besides this bug, we also assume the target will always ask for nice transfer lengths and the first burst length will always be a nice value. As far as I can tell form the RFC this is not a requirement. It would be silly to do this, but if someone did it we will end doing bad things. Finally the last bug in that bit of code is in our handling of the recalculation of data digests when we do not send a whole iscsi_buf in one try. The bug here is that we call crypto_digest_final on a iscsi_sendpage error, then when we send the rest of the iscsi_buf, we doiscsi_data_digest_init and this causes the previous data digest to be lost. And to make matters worse, some of these bugs are replicated over and over and over again for immediate data, solicited data and unsolicited data. So the attached patch made over the iscsi git tree (see kernel.org/git for details) which I updated today to include the patches I said I merged, consolidates the sending of data, padding and digests and calculation of data digests and fixes the above bugs. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>