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* RDS: Rewrite rds_send_xmitAndy Grover2010-09-082-63/+73
| | | | | | | | | | | | | | | | Simplify rds_send_xmit(). Send a congestion map (via xmit_cong_map) without decrementing send_quota. Move resetting of conn xmit variables to end of loop. Update comments. Implement a special case to turn off sending an rds header when there is an atomic op and no other data. Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: Rename data op members prefix from m_ to op_Andy Grover2010-09-086-51/+51
| | | | | | For consistency. Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: Remove struct rds_rdma_opAndy Grover2010-09-088-148/+145
| | | | | | | | | | | | A big changeset, but it's all pretty dumb. struct rds_rdma_op was already embedded in struct rm_rdma_op. Remove rds_rdma_op and put its members in rm_rdma_op. Rename members with "op_" prefix instead of "r_", for consistency. Of course this breaks a lot, so fixup the code accordingly. Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: purge atomic resources too in rds_message_purge()Andy Grover2010-09-083-0/+22
| | | | | | | Add atomic_free_op function, analogous to rdma_free_op, and call it in rds_message_purge(). Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: Inline rdma_prepare into cmsg_rdma_argsAndy Grover2010-09-081-26/+12
| | | | | | | | cmsg_rdma_args just calls rdma_prepare and does a little arg checking -- not quite enough to justify its existence. Plus, it is the only caller of rdma_prepare(). Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: Implement silent atomicsAndy Grover2010-09-085-35/+45
| | | | Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: Move loop-only function to loop.cAndy Grover2010-09-082-8/+13
| | | | | | | Also, try to better-document the locking around the rm and its m_inc in loop.c. Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS/IB: Make all flow control code conditional on i_flowctlAndy Grover2010-09-081-6/+8
| | | | | | | | Maybe things worked fine with the flow control code running even in the non-flow-control case, but making it explicitly conditional helps the non-fc case be easier to read. Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: Remove unsignaled_bytes sysctlAndy Grover2010-09-083-21/+0
| | | | | | | | Removed unsignaled_bytes sysctl and code to signal based on it. I believe unsignaled_wrs is more than sufficient for our purposes. Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: rewrite rds_ib_xmitAndy Grover2010-09-081-78/+45
| | | | | | | | | | | | Now that the header always goes first, it is possible to simplify rds_ib_xmit. Instead of having a path to handle 0-byte dgrams and another path to handle >0, these can both be handled in one path. This lets us eliminate xmit_populate_wr(). Rename sent to bytes_sent, to differentiate better from other variable named "send". Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS/IB: Remove ib_[header/data]_sge() functionsAndy Grover2010-09-083-55/+23
| | | | | | | | | | | These functions were to cope with differently ordered sg entries depending on RDS 3.0 or 3.1+. Now that we've dropped 3.0 compatibility we no longer need them. Also, modify usage sites for these to refer to sge[0] or [1] directly. Reorder code to initialize header sgs first. Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS/IB: Remove dead codeAndy Grover2010-09-081-14/+0
| | | | Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS/IB: Disallow connections less than RDS 3.1Andy Grover2010-09-082-47/+16
| | | | | | | | | | | | | | RDS 3.0 connections (in OFED 1.3 and earlier) put the header at the end. 3.1 connections put it at the head. The code has significant added complexity in order to handle both configurations. In OFED 1.6 we can drop this and simplify the code by only supporting "header-first" configuration. This patch checks the protocol version, and if prior to 3.1, does not complete the connection. Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS/IB: eliminate duplicate codeAndy Grover2010-09-081-19/+11
| | | | | | | | | both atomics and rdmas need to convert ib-specific completion codes into RDS status codes. Rename rds_ib_rdma_send_complete to rds_ib_send_complete, and have it take a pointer to the function to call with the new error code. Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: inc_purge() transport function unused - remove itAndy Grover2010-09-0812-18/+3
| | | | Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: WhitespaceAndy Grover2010-09-083-4/+3
| | | | | | Tidy up some whitespace issues. Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: Do not mask address when pinning pagesAndy Grover2010-09-081-2/+2
| | | | | | This does not appear to be necessary. Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: Base init_depth and responder_resources on hw valuesAndy Grover2010-09-084-11/+24
| | | | | | | | | Instead of using a constant for initiator_depth and responder_resources, read the per-QP values when the device is enumerated, and then use these values when creating the connection. Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: Implement atomic operationsAndy Grover2010-09-089-23/+321
| | | | | | | | | | | | | | Implement a CMSG-based interface to do FADD and CSWP ops. Alter send routines to handle atomic ops. Add atomic counters to stats. Add xmit_atomic() to struct rds_transport Inline rds_ib_send_unmap_rdma into unmap_rm Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: Clear up some confusing code in send_remove_from_sockAndy Grover2010-09-081-1/+1
| | | | | | | | | The previous code was correct, but made the assumption that if r_notifier was non-NULL then either r_recverr or r_notify was true. Valid, but fragile. Changed to explicitly check r_recverr (shows up in greps for recverr now, too.) Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: make sure all sgs alloced are initializedAndy Grover2010-09-082-3/+2
| | | | | | | rds_message_alloc_sgs() now returns correctly-initialized sg lists, so calleds need not do this themselves. Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: make m_rdma_op a member of rds_messageAndy Grover2010-09-086-90/+129
| | | | | | | | | | | | | | This eliminates a separate memory alloc, although it is now necessary to add an "r_active" flag, since it is no longer to use the m_rdma_op pointer as an indicator of if an rdma op is present. rdma SGs allocated from rm sg pool. rds_rm_size also gets bigger. It's a little inefficient to run through CMSGs twice, but it makes later steps a lot smoother. Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: fold rdma.h into rds.hAndy Grover2010-09-0812-95/+77
| | | | | | | RDMA is now an intrinsic part of RDS, so it's easier to just have a single header. Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: Explicitly allocate rm in sendmsg()Andy Grover2010-09-083-27/+62
| | | | | | | | | | | | | | r_m_copy_from_user used to allocate the rm as well as kernel buffers for the data, and then copy the data in. Now, sendmsg() allocates the rm, although the data buffer alloc still happens in r_m_copy_from_user. SGs are still allocated with rm, but now r_m_alloc_sgs() is used to reserve them. This allows multiple SG lists to be allocated from the one rm -- this is important once we also want to alloc our rdma sgl from this pool. Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: cleanup/fix rds_rdma_unuseAndy Grover2010-09-081-12/+15
| | | | | | | | | | | First, it looks to me like the atomic_inc is wrong. We should be decrementing refcount only once here, no? It's already being done by the mr_put() at the end. Second, simplify the logic a bit by bailing early (with a warning) if !mr. Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: break out rdma and data ops into nested structs in rds_messageAndy Grover2010-09-087-85/+96
| | | | | | | Clearly separate rdma-related variables in rm from data-related ones. This is in anticipation of adding atomic support. Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: cleanup: remove "== NULL"s and "!= NULL"s in ptr comparisonsAndy Grover2010-09-0826-90/+90
| | | | | | Favor "if (foo)" style over "if (foo != NULL)". Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: move rds_shutdown_worker impl. to rds_conn_shutdownAndy Grover2010-09-083-53/+63
| | | | | | This fits better in connection.c, rather than threads.c. Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: Fix locking in send on m_rs_lockAndy Grover2010-09-081-7/+8
| | | | | | | | Do not nest m_rs_lock under c_lock Disable interrupts in {rdma,atomic}_send_complete Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: Rewrite rds_send_drop_to() for clarityAndy Grover2010-09-081-35/+29
| | | | | | | | | | | | | This function has been the source of numerous bugs; it's just too complicated. Simplified to nest spinlocks cleanly within the second loop body, and kick out early if there are no rms to drop. This will be a little slower because conn lock is grabbed for each entry instead of "caching" the lock across rms, but this should be entirely irrelevant to fastpath performance. Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: Fix corrupted rds_mrsTina Yang2010-09-081-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On second look at this bug (OFED #2002), it seems that the collision is not with the retransmission queue (packet acked by the peer), but with the local send completion. A theoretical sequence of events (from time t0 to t3) is thought to be as follows, Thread #1 t0: sock_release rds_release rds_send_drop_to /* wait on send completion */ t2: rds_rdma_drop_keys() /* destroy & free all mrs */ Thread #2 t1: rds_ib_send_cq_comp_handler rds_ib_send_unmap_rm rds_message_unmapped /* wake up #1 @ t0 */ t3: rds_message_put rds_message_purge rds_mr_put /* memory corruption detected */ The problem with the rds_rdma_drop_keys() is it could remove a mr's refcount more than its due (i.e. repeatedly as long as it still remains in the tree (mr->r_refcount > 0)). Theoretically it should remove only one reference - reference by the tree. /* Release any MRs associated with this socket */ while ((node = rb_first(&rs->rs_rdma_keys))) { mr = container_of(node, struct rds_mr, r_rb_node); if (mr->r_trans == rs->rs_transport) mr->r_invalidate = 0; rds_mr_put(mr); } I think the correct way of doing it is to remove the mr from the tree and rds_destroy_mr it first, then a rds_mr_put() to decrement its reference count by one. Whichever thread holds the last reference will free the mr via rds_mr_put(). Signed-off-by: Tina Yang <tina.yang@oracle.com> Signed-off-by: Andy Grover <andy.grover@oracle.com>
* RDS: Fix BUG_ONs to not fire when in a taskletAndy Grover2010-09-082-2/+2
| | | | | | | | in_interrupt() is true in softirqs. The BUG_ONs are supposed to check for if irqs are disabled, so we should use BUG_ON(irqs_disabled()) instead, duh. Signed-off-by: Andy Grover <andy.grover@oracle.com>
* net: poll() optimizationsEric Dumazet2010-09-064-12/+8
| | | | | | | No need to test twice sk->sk_shutdown & RCV_SHUTDOWN Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* mlx4_en: Fixed Ethtool statistics reportYevgeny Petrilin2010-09-062-2/+2
| | | | | | | | The values didn't match the title after removing the LRO statistics in commit fa37a9586f92051de03a13e55e5ec3880bb6783e Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il> Signed-off-by: David S. Miller <davem@davemloft.net>
* mlx4_en: Consider napi_get_frags() failure.Yevgeny Petrilin2010-09-061-0/+2
| | | | | | | | | If failed to get skb frags using napi_get_frags(), the packet is dropped. Reported-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il> Signed-off-by: David S. Miller <davem@davemloft.net>
* net/caifcaif_dev.c: Use netdev_<level>Joe Perches2010-09-061-8/+8
| | | | | | | | Convert pr_<level>("%s" ..., (struct netdev *)->name ...) to netdev_<level>((struct netdev *), ...) Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net/caif: Use pr_fmtJoe Perches2010-09-0616-181/+167
| | | | | | | | | | | | | | | This patch standardizes caif message logging prefixes. Add #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__ Add missing "\n"s to some logging messages Convert pr_warning to pr_warn This changes the logging message prefix from CAIF: to caif: for all uses but caif_socket.c and chnl_net.c. Those now use their filename without extension. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* drivers/atm/firestream.c: Fix unsigned return typeJulia Lawall2010-09-061-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | The function has an unsigned return type, but returns a negative constant to indicate an error condition. The result of calling the function is always stored in a variable of type (signed) int, and thus unsigned can be dropped from the return type. A sematic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @exists@ identifier f; constant C; @@ unsigned f(...) { <+... * return -C; ...+> } // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: David S. Miller <davem@davemloft.net>
* net/9p/trans_fd.c: Fix unsigned return typeJulia Lawall2010-09-061-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | The function has an unsigned return type, but returns a negative constant to indicate an error condition. The result of calling the function is always stored in a variable of type (signed) int, and thus unsigned can be dropped from the return type. A sematic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @exists@ identifier f; constant C; @@ unsigned f(...) { <+... * return -C; ...+> } // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: David S. Miller <davem@davemloft.net>
* drivers/net: Removing undead ifdef CHELSIO_T1_1GChristian Dietrich2010-09-061-2/+0
| | | | | | | | The CHELSIO_T1_1G ifdef isn't necessary at this point, because it is checked in an outer ifdef level already and has no effect here. Signed-off-by: Christian Dietrich <qy03fugy@stud.informatik.uni-erlangen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* drivers/net/jme: Use pr_<level>Joe Perches2010-09-062-53/+48
| | | | | | | | | | | Add #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt Convert jeprintk to pr_err Remove jeprintk macro define Remove periods from end of logging messages Coalesce format strings Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* isdn: cleanup: make buffer smallerDan Carpenter2010-09-061-2/+2
| | | | | | | | | | This showed up in my audit because we use strcpy() to copy "ds" into a 32 character buffer inside the isdn_tty_dial() function. But it turns out that we only ever use the first 32 characters so it's OK. I have changed the declaration to make the static checkers happy. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* isdn: potential buffer overflowsDan Carpenter2010-09-061-3/+3
| | | | | | | | | cs->ics.parm.setup.phone is a 32 character array. In each of these cases we're copying from a 35 character array into a 32 character array so we should use strlcpy() instead of strcpy(). Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* NET: bna, fix lock imbalanceJiri Slaby2010-09-061-1/+2
| | | | | | | | | | bnad_set_rx_mode omit to unlock bna_lock on one fail path. Fix that. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: Debashis Dutt <ddutt@brocade.com> Cc: Rasesh Mody <rmody@brocade.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* drivers/net/fs_enet/fs_enet-main.c: Add of_node_put to avoid memory leakJulia Lawall2010-09-061-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In this case, a device_node structure is stored in another structure that is then freed without first decrementing the reference count of the device_node structure. The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r exists@ expression x; identifier f; position p1,p2; @@ x@p1->f = \(of_find_node_by_path\|of_find_node_by_name\|of_find_node_by_phandle\|of_get_parent\|of_get_next_parent\|of_get_next_child\|of_find_compatible_node\|of_match_node\|of_find_node_by_type\|of_find_node_with_property\|of_find_matching_node\|of_parse_phandle\|of_node_get\)(...); ... when != of_node_put(x) kfree@p2(x) @script:python@ p1 << r.p1; p2 << r.p2; @@ cocci.print_main("call",p1) cocci.print_secs("free",p2) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Acked-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: pskb_expand_head() optimizationEric Dumazet2010-09-061-5/+20
| | | | | | | | | | | | | pskb_expand_head() blindly takes references on fragments before calling skb_release_data(), potentially releasing these references. We can add a fast path, avoiding these atomic operations, if we own the last reference on skb->head. Based on a previous patch from David Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ibmveth: Update module information and versionSantiago Leon2010-09-063-48/+54
| | | | | | | | | | | | Add an entry to the MAINTAINERS file for ibmveth, clean up the copyright and add all authors. Change the name of the module to reflect the product name over the last number of years. Considering all the changes we have made, bump the driver version. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Santiago Leon <santil@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ibmveth: Remove some unnecessary include filesSantiago Leon2010-09-061-3/+0
| | | | | | | | These files probably came across from the skeleton driver. Remove them. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Santiago Leon <santil@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ibmveth: Convert driver specific assert to BUG_ONSantiago Leon2010-09-061-23/+11
| | | | | | | | | We had a driver specific assert function which wasn't enabled most of the time. Convert them to BUG_ON and enable them all the time. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Santiago Leon <santil@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ibmveth: Return -EINVAL on all ->probe errorsSantiago Leon2010-09-061-2/+2
| | | | | | | | We had a few cases where we returned success on error. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Santiago Leon <santil@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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