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* [PATCH] drop-pagecacheAndrew Morton2006-01-08
| | | | | | | | | | | | | | | | | | | | | | Add /proc/sys/vm/drop_caches. When written to, this will cause the kernel to discard as much pagecache and/or reclaimable slab objects as it can. THis operation requires root permissions. It won't drop dirty data, so the user should run `sync' first. Caveats: a) Holds inode_lock for exorbitant amounts of time. b) Needs to be taught about NUMA nodes: propagate these all the way through so the discarding can be controlled on a per-node basis. This is a debugging feature: useful for getting consistent results between filesystem benchmarks. We could possibly put it under a config option, but it's less than 300 bytes. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge git://git.linux-nfs.org/pub/linux/nfs-2.6Linus Torvalds2006-01-06
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| * NFSv4: Fix an Oops in nfs_do_expire_all_delegationsTrond Myklebust2006-01-06
| | | | | | | | | | | | If the loop errors, we need to exit. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: Allow entries in the idmap cache to expireTrond Myklebust2006-01-06
| | | | | | | | | | | | | | | | | | | | If someone changes the uid/gid mapping in userland, then we do eventually want those changes to be propagated to the kernel. Currently the kernel assumes that it may cache entries forever. Add an expiration time + garbage collector for idmap entries. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: get rid of some needless code obfuscation in xdr_encode_sattr().Trond Myklebust2006-01-06
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Send valid mode bits to the serverTrond Myklebust2006-01-06
| | | | | | | | | | | | | | inode->i_mode contains a lot more than just the mode bits. Make sure that we mask away this extra stuff in SETATTR calls to the server. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * SUNRPC: get rid of cl_chattyChuck Lever2006-01-06
| | | | | | | | | | | | | | | | | | | | | | | | Clean up: Every ULP that uses the in-kernel RPC client, except the NLM client, sets cl_chatty. There's no reason why NLM shouldn't set it, so just get rid of cl_chatty and always be verbose. Test-plan: Compile with CONFIG_NFS enabled. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * SUNRPC: new interface to force an RPC rebindChuck Lever2006-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We'd like to hide fields in rpc_xprt and rpc_clnt from upper layer protocols. Start by creating an API to force RPC rebind, replacing logic that simply sets cl_port to zero. Test-plan: Destructive testing (unplugging the network temporarily). Connectathon with UDP and TCP. NFSv2/3 and NFSv4 mounting should be carefully checked. Probably need to rig a server where certain services aren't running, or that returns an error for some typical operation. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv3: try get_root user-supplied security_flavorJ. Bruce Fields2006-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Thanks to Ed Keizer for bug and root cause. He says: "... we could only mount the top-level Solaris share. We could not mount deeper into the tree. Investigation showed that Solaris allows UNIX authenticated FSINFO only on the top level of the share. This is a problem because we share/export our home directories one level higher than we mount them. I.e. we share the partition and not the individual home directories. This prevented access to home directories." We still may need to try auth_sys for the case where the client doesn't have appropriate credentials. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NLM: fix parsing of sm notify procedureJ. Bruce Fields2006-01-06
| | | | | | | | | | | | | | | | | | | | The procedure that decodes statd sm_notify call seems to be skipping a few arguments. How did this ever work? >From folks at Polyserve. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NLM: Further cancel fixesJ. Bruce Fields2006-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the server receives an NLM cancel call and finds no waiting lock to cancel, then chances are the lock has already been applied, and the client just hadn't yet processed the NLM granted callback before it sent the cancel. The Open Group text, for example, perimts a server to return either success (LCK_GRANTED) or failure (LCK_DENIED) in this case. But returning an error seems more helpful; the client may be able to use it to recognize that a race has occurred and to recover from the race. So, modify the relevant functions to return an error in this case. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NLM: clean up nlmsvc_delete_blockJ. Bruce Fields2006-01-06
| | | | | | | | | | | | | | The fl_next check here is superfluous (and possibly a layering violation). Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NLM: don't unlock on cancel requestsJ. Bruce Fields2006-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently when lockd gets an NLM_CANCEL request, it also does an unlock for the same range. This is incorrect. The Open Group documentation says that "This procedure cancels an *outstanding* blocked lock request." (Emphasis mine.) Also, consider a client that holds a lock on the first byte of a file, and requests a lock on the entire file. If the client cancels that request (perhaps because the requesting process is signalled), the server shouldn't apply perform an unlock on the entire file, since that will also remove the previous lock that the client was already granted. Or consider a lock request that actually *downgraded* an exclusive lock to a shared lock. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NLM: Clean up nlmsvc_grant_reply lockingJ. Bruce Fields2006-01-06
| | | | | | | | | | | | | | | | | | Slightly simpler logic here makes it more trivial to verify that the up's and down's are balanced here. Break out an assignment from a conditional while we're at it. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: Allow user to set the port used by the NFSv4 callback channelTrond Myklebust2006-01-06
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Clean up weak cache consistency codeTrond Myklebust2006-01-06
| | | | | | | | | | | | ...and ensure that nfs_update_inode() respects wcc Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: Ensure DELEGRETURN returns attributesTrond Myklebust2006-01-06
| | | | | | | | | | | | | | | | Upon return of a write delegation, the server will almost always bump the change attribute. Ensure that we pick up that change so that we don't invalidate our data cache unnecessarily. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: Ensure change attribute returned by GETATTR callback conforms to specTrond Myklebust2006-01-06
| | | | | | | | | | | | | | | | | | | | | | According to RFC3530 we're supposed to cache the change attribute at the time the client receives a write delegation. If the inode is clean, a CB_GETATTR callback by the server to the client is supposed to return the cached change attribute. If, OTOH, the inode is dirty, the client should bump the cached change attribute by 1. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Make directIO aware of compound pages...Trond Myklebust2006-01-06
| | | | | | | | | | | | ...and avoid calling set_page_dirty on them Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Make stat() return updated mtimes after a write()Trond Myklebust2006-01-06
| | | | | | | | | | | | | | | | | | The SuS states that a call to write() will cause mtime to be updated on the file. In order to satisfy that requirement, we need to flush out any cached writes in nfs_getattr(). Speed things up slightly by not committing the writes. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: Ensure that we return the delegation on the target of a rename too.Trond Myklebust2006-01-06
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: support large reads and writes on the wireChuck Lever2006-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Most NFS server implementations allow up to 64KB reads and writes on the wire. The Solaris NFS server allows up to a megabyte, for instance. Now the Linux NFS client supports transfer sizes up to 1MB, too. This will help reduce protocol and context switch overhead on read/write intensive NFS workloads, and support larger atomic read and write operations on servers that support them. Test-plan: Connectathon and iozone on mount point with wsize=rsize>32768 over TCP. Tests with NFS over UDP to verify the maximum RPC payload size cap. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: make "inode number mismatch" message more usefulChuck Lever2006-01-06
| | | | | | | | | | | | | | | | | | | | | | To help NFS users and server developers, make the "inode number mismatch" message display more useful information. Test-plan: None. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: get rid of useless kernel log messageChuck Lever2006-01-06
| | | | | | | | | | | | | | | | | | | | | | nfs_statfs() generates a log message when GETATTR returns an error. This is usually a useless message. Make it a dprintk. Test plan: None Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Fix error recovery code in fs/nfs/inode.c:__init_nfs()Chuck Lever2006-01-06
| | | | | | | | | | | | | | Red Hat found a problem in the error recovery logic in __init_nfs. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: use generic_write_checks() to sanity check direct writesChuck Lever2006-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | Replace ad hoc write parameter sanity checking in nfs_file_direct_write() with a call to generic_write_checks(). This should make the proper checks modulo the O_LARGEFILE flag, and should catch NFSv2-specific limitations by virtue of i_sb->s_maxbytes. Test plan: Posix compliance testing with both NFSv2 and NFSv3. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: Remove requirement for machine creds for the "setclientid" operationTrond Myklebust2006-01-06
| | | | | | | | | | | | Use a cred from the nfs4_client->cl_state_owners list. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: Remove requirement for machine creds for the "renew" operationTrond Myklebust2006-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In RFC3530, the RENEW operation is allowed to use either the same principal, RPC security flavour and (if RPCSEC_GSS), the same mechanism and service that was used for SETCLIENTID_CONFIRM OR Any principal, RPC security flavour and service combination that currently has an OPEN file on the server. Choose the latter since that doesn't require us to keep credentials for the same principal for the entire duration of the mount. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: Send RENEW requests to the server only when we're holding stateTrond Myklebust2006-01-06
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Convert instances of kernel_thread() to kthread()Trond Myklebust2006-01-06
| | | | | | | | | | | | | | Convert private implementations in NFSv4 state recovery and delegation code to use kthreads. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: State recovery cleanupTrond Myklebust2006-01-06
| | | | | | | | | | | | Use wait_on_bit() when waiting for state recovery to complete. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: OPEN/LOCK/LOCKU/CLOSE will automatically renew the NFSv4 leaseTrond Myklebust2006-01-06
| | | | | | | | | | | | Cut down on the number of unnecessary RENEW requests on the wire. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * SUNRPC: Ensure that SIGKILL will always terminate a synchronous RPC call.Trond Myklebust2006-01-06
| | | | | | | | | | | | | | ...and make sure that the "intr" flag also enables SIGHUP and SIGTERM to interrupt RPC calls too (as per the Solaris implementation). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: Make DELEGRETURN an interruptible operation.Trond Myklebust2006-01-06
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: Convert LOCK rpc call into an asynchronous RPC callTrond Myklebust2006-01-06
| | | | | | | | | | | | In order to allow users to interrupt/cancel it. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: locking XDR cleanupTrond Myklebust2006-01-06
| | | | | | | | | | | | Get rid of some unnecessary intermediate structures Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: Make open recovery track O_RDWR, O_RDONLY and O_WRONLY correctlyTrond Myklebust2006-01-06
| | | | | | | | | | | | | | When recovering from a delegation recall or a network partition, we need to replay open(O_RDWR), open(O_RDONLY) and open(O_WRONLY) separately. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: Make nfs4_state track O_RDWR, O_RDONLY and O_WRONLY separatelyTrond Myklebust2006-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | A closer reading of RFC3530 reveals that OPEN_DOWNGRADE must always specify a access modes that have been the argument of a previous OPEN operation. IOW: doing OPEN(O_RDWR) and then OPEN_DOWNGRADE(O_WRONLY) is forbidden unless the user called OPEN(O_WRONLY) In order to fix that, we really need to track the three possible open states separately. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: Make open_confirm() asynchronous tooTrond Myklebust2006-01-06
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: Convert open() into an asynchronous RPC callTrond Myklebust2006-01-06
| | | | | | | | | | | | | | | | | | OPEN is a stateful operation, so we must ensure that it always completes. In order to allow users to interrupt the operation, we need to make the RPC call asynchronous, and then wait on completion (or cancel). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: Allocate OPEN call RPC arguments using kmalloc()Trond Myklebust2006-01-06
| | | | | | | | | | | | Cleanup in preparation for making OPEN calls interruptible by the user. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: Make locku use the new RPC "wait on completion" interface.Trond Myklebust2006-01-06
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: stateful NFSv4 RPC call interfaceTrond Myklebust2006-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The NFSv4 model requires us to complete all RPC calls that might establish state on the server whether or not the user wants to interrupt it. We may also need to schedule new work (including new RPC calls) in order to cancel the new state. The asynchronous RPC model will allow us to ensure that RPC calls always complete, but in order to allow for "synchronous" RPC, we want to add the ability to wait for completion. The waits are, of course, interruptible. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * SUNRPC: Further cleanupsTrond Myklebust2006-01-06
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * RPC: Clean up RPC task structureTrond Myklebust2006-01-06
| | | | | | | | | | | | | | | | | | | | Shrink the RPC task structure. Instead of storing separate pointers for task->tk_exit and task->tk_release, put them in a structure. Also pass the user data pointer as a parameter instead of passing it via task->tk_calldata. This enables us to nest callbacks. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Work correctly with single-page ->writepage() callsTrond Myklebust2006-01-06
| | | | | | | | | | | | | | Ensure that we always initiate flushing of data before we exit a single-page ->writepage() call. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | [PATCH] fs/ufs: debug mode compilation failureEvgeniy2006-01-06
|/ | | | | | | This patch should fix compilation failure of fs/ufs/dir.c with defined UFS_DIR_DEBUG Signed-off-by: Evgeniy Dushistov <dushistov@mail.ru> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge branch 'post-2.6.15' of git://brick.kernel.dk/data/git/linux-2.6-blockLinus Torvalds2006-01-06
|\ | | | | | | | | | | | | Manual fixup for merge with Jens' "Suspend support for libata", commit ID 9b847548663ef1039dd49f0eb4463d001e596bc3. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| * [BLOCK] bio: check for same page merge possibilities in __bio_add_page()Jens Axboe2006-01-06
| | | | | | | | | | | | | | | | | | For filesystems with a blocksize < page size, we can merge same page calls into the bio_vec at the end of the bio. This saves segments on systems with a page size > the "normal" 4kb fs block size. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@suse.de>
* | [PATCH] knfsd: reduce stack consumptionNeil Brown2006-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A typical nfsd call trace is nfsd -> svc_process -> nfsd_dispatch -> nfsd3_proc_write -> nfsd_write ->nfsd_vfs_write -> vfs_writev These add up to over 300 bytes on the stack. Looking at each of these, I see that nfsd_write (which includes nfsd_vfs_write) contributes 0x8c to stack usage itself!! It turns out this is because it puts a 'struct iattr' on the stack so it can kill suid if needed. The following patch saves about 50 bytes off the stack in this call path. 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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