- 04 Oct, 2006 40 commits
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Olaf Kirch authored
Every NLM call includes the client's NSM state. Currently, the Linux client always reports 0 - which seems not to cause any problems, but is not what the protocol says. This patch exposes the kernel's internal variable to user space via a sysctl, which can be set at system boot time by statd. Signed-off-by:
Olaf Kirch <okir@suse.de> Signed-off-by:
Neil Brown <neilb@suse.de> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Olaf Kirch authored
When we send a GRANTED_MSG call, we current copy the NLM cookie provided in the original LOCK call - because in 1996, some broken clients seemed to rely on this bug. However, this means the cookies are not unique, so that when the client's GRANTED_RES message comes back, we cannot simply match it based on the cookie, but have to use the client's IP address in addition. Which breaks when you have a multi-homed NFS client. The X/Open spec explicitly mentions that clients should not expect the same cookie; so one may hope that any clients that were broken in 1996 have either been fixed or rendered obsolete. Signed-off-by:
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Olaf Kirch authored
The way we incremented the NLM cookie in nlmclnt_next_cookie was not thread safe. This patch changes the counter to an atomic_t Signed-off-by:
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Olaf Kirch authored
This patch adds the nsm_use_hostnames sysctl and module param. If set, lockd will use the client's name (as given in the NLM arguments) to find the NSM handle. This makes recovery work when the NFS peer is multi-homed, and the reboot notification arrives from a different IP than the original lock calls. Signed-off-by:
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NeilBrown authored
As a result of previous patches, the loop in nlmsvc_invalidate_all just sets h_expires for all client/hosts to 0 (though does it in a very complicated way). This was possibly meant to trigger early garbage collection but half the time '0' is in the future and so it infact delays garbage collection. Pre-aging the 'hosts' is not really needed at this point anyway so we throw out the loop and nlm_find_client which is no longer needed. Signed-off-by:
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Olaf Kirch authored
This patch moves the host destruction code out of nlm_host_gc into a function of its own. Signed-off-by:
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Olaf Kirch authored
This patch makes nlm_traverse{locks,blocks,shares} and friends use a function pointer rather than a "action" enum. This function pointer is given two nlm_hosts (one given by the caller, the other taken from the lock/block/share currently visited), and is free to do with them as it wants. If it returns a non-zero value, the lockd/block/share is released. Signed-off-by: -
Olaf Kirch authored
This changes struct nlm_file and the nlm_files hash table to use a hlist instead of the home-grown lists. This allows us to remove f_hash which was only used to find the right hash chain to delete an entry from. It also increases the size of the nlm_files hash table from 32 to 128. Signed-off-by:
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Olaf Kirch authored
This patch changes the nlm_blocked list to use a list_node instead of homegrown linked list handling. Signed-off-by:
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Olaf Kirch authored
Get rid of the home-grown singly linked lists for the nlm_host hash table. Signed-off-by:
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Olaf Kirch authored
This converts the statd upcalls to use the nsm_handle This means that we only register each host once with statd, rather than registering each host/vers/protocol triple. Signed-off-by:
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Olaf Kirch authored
This patch makes the SM_NOTIFY handling understand and use the nsm_handle. To make it a bit clear what is happening: nlmclent_prepare_reclaim and nlmclnt_finish_reclaim get open-coded into 'reclaimer' The result is tidied up. Then some of that functionality is moved out into nlm_host_rebooted (which calls nlmclnt_recovery which starts a thread which runs reclaimer). Also host_rebooted now finds an nsm_handle rather than a host, then then iterates over all hosts and deals with each host that shares that nsm_handle. Signed-off-by: -
Olaf Kirch authored
cleans up some code in lockd/host.c, fixes an error printk and makes it a fatal BUG if nlmsvc_free_host_resources fails. Signed-off-by:
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Olaf Kirch authored
This patch introduces the nsm_handle, which is shared by all nlm_host objects referring to the same client. With this patch applied, all nlm_hosts from the same address will share the same nsm_handle. A future patch will add sharing by name. Note: this patch changes h_name so that it is no longer guaranteed to be an IP address of the host. When the host represents an NFS server, h_name will be the name passed in the mount call. When the host represents a client, h_name will be the name presented in the lock request received from the client. A h_name is only used for printing informational messages, this change should not be significant. Signed-off-by:
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Olaf Kirch authored
This patch adds the peer's hostname (and name length) to all calls to nlm*_lookup_host functions. A subsequent patch will make use of these (is requested by a sysctl). Signed-off-by:
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Olaf Kirch authored
Common code from nlm4svc_proc_sm_notify and nlmsvc_proc_sm_notify is moved into a new nlm_host_rebooted. This is in preparation of a patch that will change the reboot notification handling entirely. Signed-off-by:
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Olaf Kirch authored
This patch moves all checks of the h_monitored flag into the nsm_monitor/unmonitor functions. A subsequent patch will replace the mechanism by which we mark a host as being monitored. There is still one occurence of h_monitored outside of mon.c and that is in clntlock.c where we respond to a reboot. The subsequent patch will modify this too. Signed-off-by:
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Greg Banks authored
Speed up high call-rate workloads by caching the struct ip_map for the peer on the connected struct svc_sock instead of looking it up in the ip_map cache hashtable on every call. This helps workloads using AUTH_SYS authentication over TCP. Testing was on a 4 CPU 4 NIC Altix using 4 IRIX clients, each with 16 synthetic client threads simulating an rsync (i.e. recursive directory listing) workload reading from an i386 RH9 install image (161480 regular files in 10841 directories) on the server. That tree is small enough to fill in the server's RAM so no disk traffic was involved. This setup gives a sustained call rate in excess of 60000 calls/sec before being CPU-bound on the server. Profiling showed strcmp(), called from ip_map_match(), was taking 4.8% of each CPU, and ip_map_lookup() was taking 2.9%. This patch drops both contribution into the profile noise. Note that the above result overstates this value of this patch for most workloads. The synthetic clients are all using separate IP addresses, so there are 64 entries in the ip_map cache hash. Because the kernel measured contained the bug fixed in commit commit 1f1e030b and was running on 64bit little-endian machine, probably all of those 64 entries were on a single chain, thus increasing the cost of ip_map_lookup(). With a modern kernel you would need more clients to see the same amount of performance improvement. This patch has helped to scale knfsd to handle a deployment with 2000 NFS clients. Signed-off-by:
Greg Banks <gnb@melbourne.sgi.com> Signed-off-by:
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Greg Banks authored
Make the nfsd read-ahead params cache more SMP-friendly by changing the single global list and lock into a fixed 16-bucket hashtable with per-bucket locks. This reduces spinlock contention in nfsd_read() on read-heavy workloads on multiprocessor servers. Testing was on a 4 CPU 4 NIC Altix using 4 IRIX clients each doing 1K streaming reads at full line rate. The server had 128 nfsd threads, which sizes the RA cache at 256 entries, of which only a handful were used. Flat profiling shows nfsd_read(), including the inlined nfsd_get_raparms(), taking 10.4% of each CPU. This patch drops the contribution from nfsd() to 1.71% for each CPU. Signed-off-by:
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NeilBrown authored
The max possible is the maximum RPC payload. The default depends on amount of total memory. The value can be set within reason as long as no nfsd threads are currently running. The value can also be ready, allowing the default to be determined after nfsd has started. Signed-off-by:
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Greg Banks authored
The limit over UDP remains at 32K. Also, make some of the apparently arbitrary sizing constants clearer. The biggest change here involves replacing NFSSVC_MAXBLKSIZE by a function of the rqstp. This allows it to be different for different protocols (udp/tcp) and also allows it to depend on the servers declared sv_bufsiz. Note that we don't actually increase sv_bufsz for nfs yet. That comes next. Signed-off-by:
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NeilBrown authored
.. by allocating the array of 'kvec' in 'struct svc_rqst'. As we plan to increase RPCSVC_MAXPAGES from 8 upto 256, we can no longer allocate an array of this size on the stack. So we allocate it in 'struct svc_rqst'. However svc_rqst contains (indirectly) an array of the same type and size (actually several, but they are in a union). So rather than waste space, we move those arrays out of the separately allocated union and into svc_rqst to share with the kvec moved out of svc_tcp_recvfrom (various arrays are used at different times, so there is no conflict). Signed-off-by:
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NeilBrown authored
We are planning to increase RPCSVC_MAXPAGES from about 8 to about 256. This means we need to be a bit careful about arrays of size RPCSVC_MAXPAGES. struct svc_rqst contains two such arrays. However the there are never more that RPCSVC_MAXPAGES pages in the two arrays together, so only one array is needed. The two arrays are for the pages holding the request, and the pages holding the reply. Instead of two arrays, we can simply keep an index into where the first reply page is. This patch also removes a number of small inline functions that probably server to obscure what is going on rather than clarify it, and opencode the needed functionality. Also remove the 'rq_restailpage' variable as it is *always* 0. i.e. if the response 'xdr' structure has a non-empty tail it is always in the same pages as the head. check counters are initilised and incr properly check for consistant usage of ++ etc maybe extra some inlines for common approach general review Signed-off-by:
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NeilBrown authored
Arrgg.. We cannot 'lockd_up' before 'svc_addsock' as we don't know the protocol yet.... So switch it around again and save the name of the created sockets so that it can be closed if lock_up fails. Signed-off-by:
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NeilBrown authored
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NeilBrown authored
The refcount that nfsd holds on lockd is based on the number of open sockets. So when we close a socket, we should decrement the ref (with lockd_down). Currently when a socket is closed via writing to the portlist file, that doesn't happen. So: make sure we get an error return if the socket that was requested does is not found, and call lockd_down if it was. Cc: "J. Bruce Fields" <bfields@fieldses.org> Signed-off-by:
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NeilBrown authored
nfsv2 needs the I_MUTEX_PARENT on the directory when creating a file too. Signed-off-by:
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Jiri Slaby authored
Whitespace cleanup, delete unnecesasry parenthesis and braces. Signed-off-by:
Jiri Slaby <jirislaby@gmail.com> Acked-by:
Karsten Keil <kkeil@suse.de> Signed-off-by:
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Pierre Ossman authored
Use the new multi block-write error reporting flag and properly tell the block layer how much data was transferred before the error. Signed-off-by:
Pierre Ossman <drzeus@drzeus.cx> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by:
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Pierre Ossman authored
The MMC layer uses the standard work queue for doing card detection. As this queue is shared with other crucial subsystems, the effects of a long (and perhaps buggy) detection can cause the system to be unusable. E.g. the keyboard stops working while the detection routine is running. The solution is to add a specific mmc work queue to run the detection code in. This is similar to how other subsystems handle detection (a full kernel thread is the most common theme). Signed-off-by:
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Pierre Ossman authored
Some Ricoh controllers only respect a full reset when there is no card in the slot. As we wait for the reset to complete, we must avoid even requesting those resets on the buggy controllers. Signed-off-by:
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Pierre Ossman authored
Sprinkle some mmiowb() where needed (writeX() before unlock()). Signed-off-by:
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Alex Dubov authored
Signed-off-by:
Alex Dubov <oakad@yahoo.com> Cc: Daniel Qarras <dqarras@yahoo.com> Acked-by:
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Alex Dubov authored
Driver for TI Flash Media card reader. At present, only MMC/SD cards are supported. [akpm@osdl.org: cleanups, build fixes] Signed-off-by:
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Jim Cromie authored
Fix paren-placement / precedence bug breaking initialization for 1 MHz clock mode. Also fix comment spelling error, and fence-post (off-by-one) error on symbol used in request_region. Addresses http://bugzilla.kernel.org/show_bug.cgi?id=7242 Thanks alexander.krause@erazor-zone.de, dzpost@dedekind.net, for the reports and patch test, and phelps@mantara.com for the independent patch and verification. Signed-off-by:
Jim Cromie <jim.cromie@gmail.com> Cc: <alexander.krause@erazor-zone.de> Cc: <dzpost@dedekind.net> Cc: <phelps@mantara.com> Acked-by:
John Stultz <johnstul@us.ibm.com> Cc: <stable@kernel.org> Signed-off-by:
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Kenji Kaneshige authored
Roland Dreier wrote: > The change "PCI: assign ioapic resource at hotplug" (commit > 23186279 in Linus's tree) makes > networking stop working on my system (SuperMicro H8QC8 with four > dual-core Opteron 885 CPUs). In particular, the on-board NIC stops > working, probably because it gets assigned the wrong IRQ (225 in the > non-working case, 217 in the working case) > > With that patch applied, e1000 doesn't work. Reverting just that > patch (shown below) from Linus's latest tree fixes things for me. > The cause of this problem might be an wrong assumption that the 'start' member of resource structure for ioapic device has non-zero value if the resources are assigned by firmware. The 'start' member of ioapic device seems not to be set even though the resources were actually assigned to ioapic devices by firmware. Cc: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Cc: MUNEDA Takahiro <muneda.takahiro@jp.fujitsu.com> Cc: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com> Cc: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Roland Dreier <rdreier@cisco.com> Signed-off-by:
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David Gibson authored
Not all architectures have a file named 'defconfig' (e.g. powerpc). However the make TAGS and make tags targets search such files for tags, causing an error message when they don't exist. This patch addresses the problem by instructing xargs not to run the tags program if there are no matching files. Signed-off-by:
David Gibson <david@gibson.dropbear.id.au> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by:
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Eric Sesterhenn authored
Since all callers dereference dir, we dont need this check. Coverity id #337. Signed-off-by:
Eric Sesterhenn <snakebyte@gmx.de> Cc: Jeff Mahoney <jeffm@suse.com> Cc: <reiserfs-dev@namesys.com> Signed-off-by:
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Thomas Maier authored
pktcdvd: Rename a variable for better readability. Signed-off-by:
Thomas Maier <balagi@justmail.de> Signed-off-by:
Peter Osterlund <petero2@telia.com> Signed-off-by:
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Thomas Maier authored
pktcdvd: Replace pktcdvd strings with macro DRIVER_NAME. Signed-off-by:
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