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* Merge branch 'nfs-for-2.6.32'Trond Myklebust2009-09-1148-1805/+4064
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| * NFSv4: Disallow 'mount -t nfs4 -overs=2' and 'mount -t nfs4 -overs=3'Trond Myklebust2009-09-081-0/+6
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Allow the "nfs" file system type to support NFSv4Chuck Lever2009-09-083-2/+48
| | | | | | | | | | | | | | | | | | | | When mounting an "nfs" type file system, recognize "v4," "vers=4," or "nfsvers=4" mount options, and convert the file system to "nfs4" under the covers. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> [trondmy: fixed up binary mount code so it sets the 'version' field too] Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Move details of nfs4_get_sb() to a helperChuck Lever2009-09-081-13/+31
| | | | | | | | | | | | | | | | Clean up: Refactor nfs4_get_sb() to allow its guts to be invoked by nfs_get_sb(). Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Refactor NFSv4 text-based mount option validationChuck Lever2009-09-081-28/+35
| | | | | | | | | | | | | | | | | | Clean up: Refactor the part of nfs4_validate_mount_options() that handles text-based options, so we can call it from the NFSv2/v3 option validation function. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Mount option parser should detect missing "port="Chuck Lever2009-09-082-28/+36
| | | | | | | | | | | | | | | | | | | | | | | | | | The meaning of not specifying the "port=" mount option is different for "-t nfs" and "-t nfs4" mounts. The default port value for NFSv2/v3 mounts is 0, but the default for NFSv4 mounts is 2049. To support "-t nfs -o vers=4", the mount option parser must detect when "port=" is missing so that the correct default port value can be set depending on which NFS version is requested. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: out of date comment regarding O_EXCL above nfs3_proc_create()Harshula Jayasuriya2009-09-081-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Hi Trond, Recently we were observing the behaviour difference between a 2.4.x and 2.6.x kernel with respect to O_EXCL. A comment from 2.4.x era, "For now, we don't implement O_EXCL." seems inaccurate in TOT. If so, here's a patch to remove the comment. This patch is against: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 Signed-off-by: Harshula Jayasuriya <harshula@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Handle a zero-length auth flavor listChuck Lever2009-08-231-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some releases of Linux rpc.mountd (nfs-utils 1.1.4 and later) return an empty auth flavor list if no sec= was specified for the export. This is notably broken server behavior. The new auth flavor list checking added in a recent commit rejects this case. The OpenSolaris client does too. The broken mountd implementation is already widely deployed. To avoid a behavioral regression, the kernel's mount client skips flavor checking (ie reverts to the pre-2.6.32 behavior) if mountd returns an empty flavor list. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * SUNRPC: Ensure that sunrpc gets initialised before nfs, lockd, etc...Trond Myklebust2009-08-211-1/+1
| | | | | | | | | | | | | | We can oops if rpc_pipefs isn't properly initialised before we start to set up objects that depend upon it. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * nfs: fix compile error in rpc_pipefs.hJ. Bruce Fields2009-08-201-0/+2
| | | | | | | | | | | | | | This include is needed for the definition of delayed_work. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * nfs: Remove reference to generic_osync_inode from a commentJan Kara2009-08-191-3/+0
| | | | | | | | | | | | | | | | | | | | | | generic_file_direct_write() no longer calls generic_osync_inode() so remove the comment. CC: linux-nfs@vger.kernel.org CC: Neil Brown <neilb@suse.de> CC: "J. Bruce Fields" <bfields@fieldses.org> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * SUNRPC: cache must take a reference to the cache detail's module on open()Trond Myklebust2009-08-191-4/+76
| | | | | | | | | | | | | | Otherwise we Oops if the module containing the cache detail is removed before all cache readers have closed the file. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Use the DNS resolver in the mount code.Trond Myklebust2009-08-191-1/+17
| | | | | | | | | | | | | | In the referral code, use it to look up the new server's ip address if the fs_locations attribute contains a hostname. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Add a dns resolver for use with NFSv4 referrals and migrationTrond Myklebust2009-08-199-1/+639
| | | | | | | | | | | | | | | | | | | | | | | | | | The NFSv4 and NFSv4.1 protocols both allow for the redirection of a client from one server to another in order to support filesystem migration and replication. For full protocol support, we need to add the ability to convert a DNS host name into an IP address that we can feed to the RPC client. We'll reuse the sunrpc cache, now that it has been converted to work with rpc_pipefs. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * SUNRPC: Fix a typo in cache_pipefs_filesTrond Myklebust2009-08-191-1/+1
| | | | | | | | | | | | | | We want the channel to be a regular file, so that we don't need to supply rpc_pipe_ops. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * Merge branch 'nfsv4_xdr_cleanups-for-2.6.32' into nfs-for-2.6.32Trond Myklebust2009-08-19158-1436/+3577
| |\ | | | | | | | | | | | | Conflicts: fs/nfs/nfs4xdr.c
| | * nfs: nfs4xdr: optimize low level decodingBenny Halevy2009-08-141-59/+59
| | | | | | | | | | | | | | | | | | | | | do not increment decoding ptr if not needed. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * nfs: nfs4xdr: get rid of READ_BUFBenny Halevy2009-08-141-96/+379
| | | | | | | | | | | | | | | | | | | | | | | | Use xdr_inline_decode instead. Open code debug printout and error return. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * nfs: nfs4xdr: simplify decode_exchange_id by reusing decode_opaque_inlineBenny Halevy2009-08-141-9/+10
| | | | | | | | | | | | | | | Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * nfs: nfs4xdr: get rid of COPYMEMBenny Halevy2009-08-141-8/+3
| | | | | | | | | | | | | | | | | | | | | Just directly call memcpy. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * nfs: nfs4xdr: introduce decode_sessionid helperBenny Halevy2009-08-141-10/+15
| | | | | | | | | | | | | | | Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * nfs: nfs4xdr: introduce decode_verifier helperBenny Halevy2009-08-141-10/+12
| | | | | | | | | | | | | | | | | | Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Trond: Fixed up an 'uninitialised variable' issue in decode_readdir] Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * nfs: nfs4xdr: introduce decode_opaque_fixed and decode_stateid helpersBenny Halevy2009-08-141-31/+40
| | | | | | | | | | | | | | | Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * nfs: nfs4xdr: introduce print_overflow_msgBenny Halevy2009-08-141-4/+8
| | | | | | | | | | | | | | | | | | | | | Part fo the nfs4xdr cleanup. READ_BUF will go away. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * nfs: nfs4xdr: get rid of READTIMEBenny Halevy2009-08-141-5/+0
| | | | | | | | | | | | | | | | | | | | | It has no users. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * nfs: nfs4xdr: get rid of READ64Benny Halevy2009-08-141-29/+25
| | | | | | | | | | | | | | | | | | | | | | | | s/READ64\(\*(.*)\)/p = xdr_decode_hyper(p, \1)/ s/READ64\((.*)\)/p = xdr_decode_hyper(p, &\1)/ Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * nfs: nfs4xdr: get rid of READ32Benny Halevy2009-08-141-73/+72
| | | | | | | | | | | | | | | | | | | | | s/READ32\((.*)\)/\1 = be32_to_cpup(p++)/ Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * nfs: nfs4xdr: merge xdr_encode_int+xdr_encode_opaque_fixed into ↵Benny Halevy2009-08-141-28/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | xdr_encode_opaque use encode_string where appropriate. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * nfs: nfs4xdr: optimize low level encodingBenny Halevy2009-08-141-64/+64
| | | | | | | | | | | | | | | | | | | | | do not increment encoding ptr if not needed. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * nfs: nfs4xdr: change RESERVE_SPACE macro into a static helperBenny Halevy2009-08-141-73/+65
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In order to open code and expose the result pointer assignment. Alternatively, we can open code the call to xdr_reserve_space and do the BUG_ON an the error case at the call site. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * nfs: nfs4xdr: encode_compound_hdr does not have to round up reserved bytesBenny Halevy2009-08-141-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | This is already done by xdr_reserve_space and since encode_compound_hdr is adding a byte count to "12" which is already word aligned, the xdr level rounding will work just as well. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * nfs: nfs4xdr: optimize RESERVE_SPACE in encode_create_session and ↵Benny Halevy2009-08-141-17/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | encode_sequence Coalesce multilpe constant RESERVE_SPACEs into one Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * nfs: nfs4xdr: get rid of WRITEMEMBenny Halevy2009-08-141-36/+32
| | | | | | | | | | | | | | | | | | | | | s/WRITEMEM(/p = xdr_encode_opaque_fixed(p, / Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * nfs: nfs4xdr: get rid of WRITE64Benny Halevy2009-08-141-24/+20
| | | | | | | | | | | | | | | | | | | | | s/WRITE64/p = xdr_encode_hyper(p, / Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * nfs: nfs4xdr: get rid of WRITE32Benny Halevy2009-08-141-146/+145
| | | | | | | | | | | | | | | | | | | | | s/WRITE32/*p++ = cpu_to_be32/ Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * sunrpc: ntoh -> be*_to_cpuBenny Halevy2009-08-142-6/+5
| | | | | | | | | | | | | | | | | | | | | | | | ntohl is already defined as be32_to_cpu. be64_to_cpu has architecture specific optimized implementations. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * sunrpc: hton -> cpu_to_be*Benny Halevy2009-08-142-6/+5
| | | | | | | | | | | | | | | | | | | | | | | | htonl is already defined as cpu_to_be32. cpu_to_be64 has architecture specific optimized implementations. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | Merge branch 'sunrpc_cache-for-2.6.32' into nfs-for-2.6.32Trond Myklebust2009-08-1012-485/+939
| |\ \
| | * | SUNRPC: Add an rpc_pipefs front end for the sunrpc cache codeTrond Myklebust2009-08-094-0/+190
| | | | | | | | | | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | SUNRPC: Move procfs-specific stuff out of the generic sunrpc cache codeTrond Myklebust2009-08-092-131/+199
| | | | | | | | | | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | SUNRPC: Allow the cache_detail to specify alternative upcall mechanismsTrond Myklebust2009-08-096-18/+72
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For events that are rare, such as referral DNS lookups, it makes limited sense to have a daemon constantly listening for upcalls on a channel. An alternative in those cases might simply be to run the app that fills the cache using call_usermodehelper_exec() and friends. The following patch allows the cache_detail to specify alternative upcall mechanisms for these particular cases. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | SUNRPC: Remove the global temporary write buffer in net/sunrpc/cache.cTrond Myklebust2009-08-091-25/+70
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | While we do want to protect against multiple concurrent readers and writers on each upcall/downcall pipe, we don't want to limit concurrent reading and writing to separate caches. This patch therefore replaces the static buffer 'write_buf', which can only be used by one writer at a time, with use of the page cache as the temporary buffer for downcalls. We still fall back to using the the old global buffer if the downcall is larger than PAGE_CACHE_SIZE, since this is apparently needed by the SPKM security context initialisation. It then replaces the use of the global 'queue_io_mutex' with the inode->i_mutex in cache_read() and cache_write(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | SUNRPC: Ensure we initialise the cache_detail before creating procfs filesTrond Myklebust2009-08-091-10/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Also ensure that we destroy those files before we destroy the cache_detail. Otherwise, user processes might attempt to write into uninitialised caches. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | NFSD: Clean up the idmapper warning...Trond Myklebust2009-08-093-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | What part of 'internal use' is so hard to understand? Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | SUNRPC: One more clean up for rpc_create_client_dir()Trond Myklebust2009-08-091-28/+50
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In order to allow rpc_pipefs to create directories with different types of subtrees, it is useful to allow the caller to customise the subtree filling process. In order to do so, we separate out the parts which are specific to making an RPC client directory, and put them in a separate helper, then we convert the process of filling the directory contents into a callback. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | SUNRPC: clean up rpc_setup_pipedir()Trond Myklebust2009-08-094-72/+37
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is still a little wart or two there: Since we've already got a vfsmount, we might as well pass that in to rpc_create_client_dir. Another point is that if we open code __rpc_lookup_path() here, then we can avoid looking up the entire parent directory path over and over again: it doesn't change. Also get rid of rpc_clnt->cl_pathname, since it has no users... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | SUNRPC: Replace rpc_client->cl_dentry and cl_mnt, with a cl_pathTrond Myklebust2009-08-094-18/+18
| | | | | | | | | | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | SUNRPC: Clean up rpc_create_client_dir()Trond Myklebust2009-08-091-42/+41
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Factor out the code that does lookups from the code that actually creates the directory. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | SUNRPC: Rename rpc_mkdir to rpc_create_client_dir()Trond Myklebust2009-08-093-11/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This reflects the fact that rpc_mkdir() as it stands today, can only create a RPC client type directory. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | SUNRPC: rpc_pipefs cleanupTrond Myklebust2009-08-091-40/+40
| | | | | | | | | | | | | | | | | | | | | | | | Move the files[] array closer to rpc_fill_super() Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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