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* dma-mapping: add the device argument to dma_mapping_error()FUJITA Tomonori2008-07-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add per-device dma_mapping_ops support for CONFIG_X86_64 as POWER architecture does: This enables us to cleanly fix the Calgary IOMMU issue that some devices are not behind the IOMMU (http://lkml.org/lkml/2008/5/8/423). I think that per-device dma_mapping_ops support would be also helpful for KVM people to support PCI passthrough but Andi thinks that this makes it difficult to support the PCI passthrough (see the above thread). So I CC'ed this to KVM camp. Comments are appreciated. A pointer to dma_mapping_ops to struct dev_archdata is added. If the pointer is non NULL, DMA operations in asm/dma-mapping.h use it. If it's NULL, the system-wide dma_ops pointer is used as before. If it's useful for KVM people, I plan to implement a mechanism to register a hook called when a new pci (or dma capable) device is created (it works with hot plugging). It enables IOMMUs to set up an appropriate dma_mapping_ops per device. The major obstacle is that dma_mapping_error doesn't take a pointer to the device unlike other DMA operations. So x86 can't have dma_mapping_ops per device. Note all the POWER IOMMUs use the same dma_mapping_error function so this is not a problem for POWER but x86 IOMMUs use different dma_mapping_error functions. The first patch adds the device argument to dma_mapping_error. The patch is trivial but large since it touches lots of drivers and dma-mapping.h in all the architecture. This patch: dma_mapping_error() doesn't take a pointer to the device unlike other DMA operations. So we can't have dma_mapping_ops per device. Note that POWER already has dma_mapping_ops per device but all the POWER IOMMUs use the same dma_mapping_error function. x86 IOMMUs use device argument. [akpm@linux-foundation.org: fix sge] [akpm@linux-foundation.org: fix svc_rdma] [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: fix bnx2x] [akpm@linux-foundation.org: fix s2io] [akpm@linux-foundation.org: fix pasemi_mac] [akpm@linux-foundation.org: fix sdhci] [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: fix sparc] [akpm@linux-foundation.org: fix ibmvscsi] Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Muli Ben-Yehuda <muli@il.ibm.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Avi Kivity <avi@qumranet.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'linus' into cpus4096-for-linusIngo Molnar2008-07-21
|\ | | | | | | | | | | | | | | Conflicts: net/sunrpc/svc.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * Merge branch 'for-2.6.27' of git://linux-nfs.org/~bfields/linuxLinus Torvalds2008-07-21
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-2.6.27' of git://linux-nfs.org/~bfields/linux: (51 commits) nfsd: nfs4xdr.c do-while is not a compound statement nfsd: Use C99 initializers in fs/nfsd/nfs4xdr.c lockd: Pass "struct sockaddr *" to new failover-by-IP function lockd: get host reference in nlmsvc_create_block() instead of callers lockd: minor svclock.c style fixes lockd: eliminate duplicate nlmsvc_lookup_host call from nlmsvc_lock lockd: eliminate duplicate nlmsvc_lookup_host call from nlmsvc_testlock lockd: nlm_release_host() checks for NULL, caller needn't file lock: reorder struct file_lock to save space on 64 bit builds nfsd: take file and mnt write in nfs4_upgrade_open nfsd: document open share bit tracking nfsd: tabulate nfs4 xdr encoding functions nfsd: dprint operation names svcrdma: Change WR context get/put to use the kmem cache svcrdma: Create a kmem cache for the WR contexts svcrdma: Add flush_scheduled_work to module exit function svcrdma: Limit ORD based on client's advertised IRD svcrdma: Remove unused wait q from svcrdma_xprt structure svcrdma: Remove unneeded spin locks from __svc_rdma_free svcrdma: Add dma map count and WARN_ON ...
| | * Merge branch 'for-bfields' of git://linux-nfs.org/~tomtucker/xprt-switch-2.6 ↵J. Bruce Fields2008-07-03
| | |\ | | | | | | | | | | | | into for-2.6.27
| | | * svcrdma: Change WR context get/put to use the kmem cacheTom Tucker2008-07-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Change the WR context pool to be shared across mount points. This reduces the RDMA transport memory footprint significantly since idle mounts don't consume WR context memory. Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
| | | * svcrdma: Create a kmem cache for the WR contextsTom Tucker2008-07-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Create a kmem cache to hold WR contexts. Next we will convert the WR context get and put services to use this kmem cache. Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
| | | * svcrdma: Add flush_scheduled_work to module exit functionTom Tucker2008-07-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Make certain all transports pending free are flushed from the wq before unloading the module. Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
| | | * svcrdma: Limit ORD based on client's advertised IRDTom Tucker2008-07-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When adapters have differing IRD limits, the RDMA transport will fail to connect properly. The RDMA transport should use the client's advertised inbound read limit when computing its outbound read limit. For iWARP transports, there is currently no standard for exchanging IRD/ORD during connection establishment so the 'responder_resources' field in the connect event is the local device's limit. The RDMA transport can be configured to use a smaller ORD by writing the desired number to the /proc/sys/sunrpc/svc_rdma/max_outbound_read_requests file. Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
| | | * svcrdma: Remove unneeded spin locks from __svc_rdma_freeTom Tucker2008-07-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | At the time __svc_rdma_free is called, we are guaranteed that all references to this transport are gone. There is, therefore, no need to protect the resource lists with a spin lock. Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
| | | * svcrdma: Add dma map count and WARN_ONTom Tucker2008-07-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a dma map count in order to verify that all DMA mapping resources have been freed when the transport is closed. Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
| | | * svcrdma: Move the DMA unmap logic to the CQ handlerTom Tucker2008-07-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Separate DMA unmap from context destruction and perform DMA unmapping in the SQ/RQ CQ reap functions. This is necessary to support software based RDMA implementations that actually copy the data in their ib_dma_unmap callback functions and architectures that don't have cache coherent I/O busses. Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
| | | * svcrdma: Use reply and chunk map for RDMA_READ processingTom Tucker2008-07-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Modify the RDMA_READ processing to use the reply and chunk list mapping data types. Also add a special purpose 'hdr_count' field in in the context to hold the header page count instead of overloading the SGE length field and corrupting the DMA map length. Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
| | | * svcrdma: Use RPC reply map for RDMA_WRITE processingTom Tucker2008-07-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use the new svc_rdma_req_map data type for mapping the client side memory to the server side memory. Move the DMA mapping to the context pointed to by each WR individually so that it is unmapped after the WR completes. Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
| | | * svcrdma: Add a type for keeping NFS RPC mappingTom Tucker2008-07-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Create a new data structure to hold the remote client address space to local server address space mapping. Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
| | * | gss_krb5: Use random value to initialize confounderKevin Coffman2008-06-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Initialize the value used for the confounder to a random value rather than starting from zero. Allow for confounders of length 8 or 16 (which will be needed for AES). Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| | * | gss_krb5: move gss_krb5_crypto into the krb5 moduleKevin Coffman2008-06-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The gss_krb5_crypto.o object belongs in the rpcsec_gss_krb5 module. Also, there is no need to export symbols from gss_krb5_crypto.c Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| | * | gss_krb5: create a define for token header size and clean up ptr locationKevin Coffman2008-06-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | cleanup: Document token header size with a #define instead of open-coding it. Don't needlessly increment "ptr" past the beginning of the header which makes the values passed to functions more understandable and eliminates the need for extra "krb5_hdr" pointer. Clean up some intersecting white-space issues flagged by checkpatch.pl. This leaves the checksum length hard-coded at 8 for DES. A later patch cleans that up. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| | * | sunrpc: remove sv_kill_signal field from svc_serv structJeff Layton2008-06-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since we no longer make any distinction between shutdown signals with nfsd, then it becomes easier to just standardize on a particular signal to use to bring it down (SIGINT, in this case). Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| | * | knfsd: convert knfsd to kthread APIJeff Layton2008-06-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch is rather large, but I couldn't figure out a way to break it up that would remain bisectable. It does several things: - change svc_thread_fn typedef to better match what kthread_create expects - change svc_pool_map_set_cpumask to be more kthread friendly. Make it take a task arg and and get rid of the "oldmask" - have svc_set_num_threads call kthread_create directly - eliminate __svc_create_thread Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| | * | knfsd: Replace lock_kernel with a mutex for nfsd thread startup/shutdown ↵Neil Brown2008-06-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | locking. This removes the BKL from the RPC service creation codepath. The BKL really isn't adequate for this job since some of this info needs protection across sleeps. Also, add some comments to try and clarify how the locking should work and to make it clear that the BKL isn't necessary as long as there is adequate locking between tasks when touching the svc_serv fields. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * | | Merge branch 'master' of ↵David S. Miller2008-07-18
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 Conflicts: Documentation/powerpc/booting-without-of.txt drivers/atm/Makefile drivers/net/fs_enet/fs_enet-main.c drivers/pci/pci-acpi.c net/8021q/vlan.c net/iucv/iucv.c
| * | | | net: remove CVS keywordsAdrian Bunk2008-06-12
| | |_|/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes CVS keywords that weren't updated for a long time from comments. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | cpumask: Replace cpumask_of_cpu with cpumask_of_cpu_ptrMike Travis2008-07-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * This patch replaces the dangerous lvalue version of cpumask_of_cpu with new cpumask_of_cpu_ptr macros. These are patterned after the node_to_cpumask_ptr macros. In general terms, if there is a cpumask_of_cpu_map[] then a pointer to the cpumask_of_cpu_map[cpu] entry is used. The cpumask_of_cpu_map is provided when there is a large NR_CPUS count, reducing greatly the amount of code generated and stack space used for cpumask_of_cpu(). The pointer to the cpumask_t value is needed for calling set_cpus_allowed_ptr() to reduce the amount of stack space needed to pass the cpumask_t value. If there isn't a cpumask_of_cpu_map[], then a temporary variable is declared and filled in with value from cpumask_of_cpu(cpu) as well as a pointer variable pointing to this temporary variable. Afterwards, the pointer is used to reference the cpumask value. The compiler will optimize out the extra dereference through the pointer as well as the stack space used for the pointer, resulting in identical code. A good example of the orthogonal usages is in net/sunrpc/svc.c: case SVC_POOL_PERCPU: { unsigned int cpu = m->pool_to[pidx]; cpumask_of_cpu_ptr(cpumask, cpu); *oldmask = current->cpus_allowed; set_cpus_allowed_ptr(current, cpumask); return 1; } case SVC_POOL_PERNODE: { unsigned int node = m->pool_to[pidx]; node_to_cpumask_ptr(nodecpumask, node); *oldmask = current->cpus_allowed; set_cpus_allowed_ptr(current, nodecpumask); return 1; } Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | Merge branch 'linus' into cpus4096Ingo Molnar2008-07-18
|\ \ \ \ | | |/ / | |/| | | | | | | | | | | | | | | | | | | | | | Conflicts: drivers/acpi/processor_throttling.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | SUNRPC: Remove the BKL from the callback functionsTrond Myklebust2008-07-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Push it into those callback functions that actually need it. Note that all the NFS operations use their own locking, so don't need the BKL. Ditto for the rpcbind client. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | SUNRPC: Support registering IPv6 interfaces with local rpcbind daemonChuck Lever2008-07-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce a new API to register RPC services on IPv6 interfaces to allow the NFS server and lockd to advertise on IPv6 networks. Unlike rpcb_register(), the new rpcb_v4_register() function uses rpcbind protocol version 4 to contact the local rpcbind daemon. The version 4 SET/UNSET procedures allow services to register address families besides AF_INET, register at specific network interfaces, and register transport protocols besides UDP and TCP. All of this functionality is exposed via the new rpcb_v4_register() kernel API. A user-space rpcbind daemon implementation that supports version 4 of the rpcbind protocol is required in order to make use of this new API. Note that rpcbind version 3 is sufficient to support the new rpcbind facilities listed above, but most extant implementations use version 4. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | SUNRPC: Refactor rpcb_register to make rpcbindv4 support easierChuck Lever2008-07-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | rpcbind version 4 registration will reuse part of rpcb_register, so just split it out into a separate function now. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | SUNRPC: None of rpcb_create's callers wants a privileged source portChuck Lever2008-07-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up: Callers that required a privileged source port now use rpcb_create_local(), so we can remove the @privileged argument from rpcb_create(). Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | SUNRPC: Introduce a specific rpcb_create for contacting localhostChuck Lever2008-07-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add rpcb_create_local() for use by rpcb_register() and upcoming IPv6 registration functions. Ensure any errors encountered by rpcb_create_local() are properly reported. We can also use a statically allocated constant loopback socket address instead of one allocated on the stack and initialized every time the function is called. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | SUNRPC: Use correct XDR encoding procedure for rpcbind SET/UNSETChuck Lever2008-07-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The rpcbind versions 3 and 4 SET and UNSET procedures use the same arguments as the GETADDR procedure. While definitely a bug, this hasn't been a problem so far since the kernel hasn't used version 3 or 4 SET and UNSET. But this will change in just a moment. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | SUNRPC: Ensure our task is notified when an rpcbind call is doneTrond Myklebust2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If another task is busy in rpcb_getport_async number, it is more efficient to have it wake us up when it has finished instead of arbitrarily sleeping for 5 seconds. Also ensure that rpcb_wake_rpcbind_waiters() is called regardless of whether or not rpcb_getport_done() gets called. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | SUNRPC: Use only rpcbind v2 for AF_INET requestsChuck Lever2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some server vendors support the higher versions of rpcbind only for AF_INET6. The kernel doesn't need to use v3 or v4 for AF_INET anyway, so change the kernel's rpcbind client to query AF_INET servers over rpcbind v2 only. This has a few interesting benefits: 1. If the rpcbind request is going over TCP, and the server doesn't support rpcbind versions 3 or 4, the client reduces by two the number of ephemeral ports left in TIME_WAIT for each rpcbind request. This will help during NFS mount storms. 2. The rpcbind interaction with servers that don't support rpcbind versions 3 or 4 will use less network traffic. Also helpful during mount storms. 3. We can eliminate the kernel build option that controls whether the kernel's rpcbind client uses rpcbind version 3 and 4 for AF_INET servers. Less complicated kernel configuration... Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | SUNRPC: Use GETADDR for rpcbind version 4 queriesChuck Lever2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some rpcbind servers that do support rpcbind version 4 do not support the GETVERSADDR procedure. Use GETADDR for querying rpcbind servers via rpcbind version 4 instead of GETVERSADDR. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | SUNRPC: Use rpcbind version 2 GETPORTChuck Lever2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up: Change the version 2 procedure name to GETPORT. It's the same procedure number as GETADDR, but version 2 implementations usually refer to it as GETPORT. This also now matches the procedure name used in the version 2 procedure entry in the rpcb_next_version[] array, making it slightly less confusing. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | SUNRPC: Document some naked integers in rpcbind clientChuck Lever2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up: Replace naked integers that represent rpcbind protocol versions. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | SUNRPC: More useful debugging output for rpcb clientChuck Lever2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up dprintk's in rpcb client's XDR decoder functions. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | SUNRPC: Ensure all transports set rq_xtime consistentlyChuck Lever2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The RPC client uses the rq_xtime field in each RPC request to determine the round-trip time of the request. Currently, the rq_xtime field is initialized by each transport just before it starts enqueing a request to be sent. However, transports do not handle initializing this value consistently; sometimes they don't initialize it at all. To make the measurement of request round-trip time consistent for all RPC client transport capabilities, pull rq_xtime initialization into the RPC client's generic transport logic. Now all transports will get a standardized RTT measure automatically, from: xprt_transmit() to xprt_complete_rqst() This makes round-trip time calculation more accurate for the TCP transport. The socket ->sendmsg() method can return "-EAGAIN" if the socket's output buffer is full, so the TCP transport's ->send_request() method may call the ->sendmsg() method repeatedly until it gets all of the request's bytes queued in the socket's buffer. Currently, the TCP transport sets the rq_xtime field every time through that loop so the final value is the timestamp just before the *last* call to the underlying socket's ->sendmsg() method. After this patch, the rq_xtime field contains a timestamp that reflects the time just before the *first* call to ->sendmsg(). This is consequential under heavy workloads because large requests often take multiple ->sendmsg() calls to get all the bytes of a request queued. The TCP transport causes the request to sleep until the remote end of the socket has received enough bytes to clear space in the socket's local output buffer. This delay can be quite significant. The method introduced by this patch is a more accurate measure of RTT for stream transports, since the server can cause enough back pressure to delay (ie increase the latency of) requests from the client. Additionally, this patch corrects the behavior of the RDMA transport, which entirely neglected to initialize the rq_xtime field. RPC performance metrics for RDMA transports now display correct RPC request round trip times. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Acked-by: Tom Talpey <thomas.talpey@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | rpc: minor cleanup of scheduler callback code\\\"J. Bruce Fields\\\2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Try to make the comment here a little more clear and concise. Also, this macro definition seems unnecessary. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | rpc: remove some unused macros\\\"J. Bruce Fields\\\2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There used to be a print_hexl() function that used isprint(), now gone. I don't know why NFS_NGROUPS and CA_RUN_AS_MACHINE were here. I also don't know why another #define that's actually used was marked "unused". Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | rpc: eliminate unused variable in auth_gss upcall code\\\"J. Bruce Fields\\\2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Also, a minor comment grammar fix in the same file. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | rpc: bring back cl_chattyOlga Kornievskaia2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The cl_chatty flag alows us to control whether a given rpc client leaves "server X not responding, timed out" messages in the syslog. Such messages make sense for ordinary nfs clients (where an unresponsive server means applications on the mountpoint are probably hanging), but not for the callback client (which can fail more commonly, with the only result just of disabling some optimizations). Previously cl_chatty was removed, do to lack of users; reinstate it, and use it for the nfsd's callback client. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | SUNRPC: Remove obsolete messages during transport connectChuck Lever2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Recent changes to the RPC client's transport connect logic make connect status values ECONNREFUSED and ECONNRESET impossible. Clean up xprt_connect_status() to account for these changes. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | SUNRPC: Display some debugging information as text rather than numbersChuck Lever2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In rpc_show_tasks(), display the program name, version number, procedure name and tk_action as human-readable variable-length text fields rather than columnar numbers. Doing the symbol lookup here helps in cases where we have actual debugging output from a kernel log, but don't have access to the kernel image or RPC module that generated the output. Sample output: -pid- flgs status -client- --rqstp- -timeout ---ops-- 5608 0001 -11 eeb42690 f6d93710 0 f8fa1764 nfsv3 WRITE a:call_transmit_status q:none 5609 0001 -11 eeb42690 f6d937e0 0 f8fa1764 nfsv3 WRITE a:call_status q:xprt_sending 5610 0001 -11 eeb42690 f6d93230 0 f8fa1764 nfsv3 WRITE a:call_status q:xprt_sending 5611 0001 -11 eeb42690 f6d93300 0 f8fa1764 nfsv3 WRITE a:call_status q:xprt_sending 5612 0001 -11 eeb42690 f6d93090 0 f8fa1764 nfsv3 WRITE a:call_status q:xprt_sending 5613 0001 -11 eeb42690 f6d933d0 0 f8fa1764 nfsv3 WRITE a:call_status q:xprt_sending 5614 0001 -11 eeb42690 f6d93cc0 0 f8fa1764 nfsv3 WRITE a:call_status q:xprt_sending 5615 0001 -11 eeb42690 f6d93a50 0 f8fa1764 nfsv3 WRITE a:call_status q:xprt_sending 5616 0001 -11 eeb42690 f6d93640 0 f8fa1764 nfsv3 WRITE a:call_status q:xprt_sending 5617 0001 -11 eeb42690 f6d93b20 0 f8fa1764 nfsv3 WRITE a:call_status q:xprt_sending 5618 0001 -11 eeb42690 f6d93160 0 f8fa1764 nfsv3 WRITE a:call_status q:xprt_sending Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | SUNRPC: Refactor rpc_show_tasksChuck Lever2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up: move the logic that displays each task to its own function. This removes indentation and makes future changes easier. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | SUNRPC: Don't display the rpc_show_tasks header if there are no tasksChuck Lever2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up: don't display the rpc_show_tasks column header unless there is at least one task to display. As far as I can tell, it is safe to let the list_for_each_entry macro decide that each list is empty. scripts/checkpatch.pl also wants a KERN_FOO at the start of any newly added printk() calls, so this and subsequent patches will also add KERN_INFO. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | SUNRPC: Rename "call_" functions that are no longer FSM statesChuck Lever2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The RPC client uses a finite state machine to move RPC tasks through each step of an RPC request. Each state is contained in a function in net/sunrpc/clnt.c, and named call_foo. Some of the functions named call_foo have changed over the past few years and are no longer states in the FSM. These include: call_encode, call_header, and call_verify. As a clean up, rename the functions that have changed. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | SUNRPC: Add a function to display the name of an RPC procedureChuck Lever2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Improve debugging messages in call_start() and call_verify() by having them show the RPC procedure name instead of the procedure number. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | SUNRPC: Use GFP_NOFS when allocating credentialsTrond Myklebust2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Since the credentials may be allocated during the call to rpc_new_task(), which again may be called by a memory allocator... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | SUNRPC: An ENOMEM error from call_encode is always fatalTrond Myklebust2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The special 'ENOMEM' case that was previously flagged as non-fatal is bogus: auth_gss always returns EAGAIN for non-fatal errors, and may in fact return ENOMEM in the special case where xdr_buf_read_netobj runs out of preallocated buffer space (invariably a _fatal_ error, since there is no provision for preallocating larger buffers). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | | SUNRPC: Ensure we exit early in case of an encode errorTrond Myklebust2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | All errors from call_encode(), with exception of EAGAIN are fatal, so we should immediately return instead of proceeding to xprt_transmit(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-11 15:30:14 -0500