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path: root/fs/nfs/nfs4filelayoutdev.c
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* SUNRPC: introduce xdr_init_decode_pagesBenny Halevy2011-05-291-7/+2
| | | | | | | Initialize xdr_stream and xdr_buf using an array of page pointers and length of buffer. Signed-off-by: Benny Halevy <bhalevy@panasas.com>
* NFSv4.1: purge deviceid cache on nfs_free_clientBenny Halevy2011-05-291-4/+5
| | | | | | | | | | | | | | Use the pnfs_layoutdriver_type both as a qualifier for the deviceid, distinguishing deviceid from different layout types on the server, and for freeing the layout-driver allocated structure containing the nfs4_deviceid_node. [BUG in _deviceid_purge_client] [layout_driver MUST set free_deviceid_node if using dev-cache] [let ver < 4.1 compile] Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> [removed EXPORT_SYMBOL_GPL(nfs4_deviceid_purge_client)] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
* NFSv4.1: make deviceid cache globalBenny Halevy2011-05-291-91/+13
| | | | | | | Move deviceid cache from the pnfs files layout driver to the generic layer in preparation for the objects layout driver. Signed-off-by: Benny Halevy <bhalevy@panasas.com>
* NFSv4.1: use struct nfs_client to qualify deviceidBenny Halevy2011-05-291-5/+4
| | | | | | | | | | | | | deviceids are unique per server, per layout type. Therefore, in the global cache in the files layout driver deviceids from different servers may clash so we need to qualify them with a struct nfs_client that represents the nfs server that returned the deviceid. Introduced in 2.6.39 commit ea8eecdd "NFSv4.1 move deviceid cache to filelayout driver" Signed-off-by: Benny Halevy <bhalevy@panasas.com>
* NFSv4.1: Ensure that layoutget uses the correct gfp modesTrond Myklebust2011-05-111-17/+17
| | | | | | | Currently, writebacks may end up recursing back into the filesystem due to GFP_KERNEL direct reclaims in the pnfs subsystem. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* Cleanup XDR parsing for LAYOUTGET, GETDEVICEINFOWeston Andros Adamson2011-03-241-56/+122
| | | | | | | | | changes LAYOUTGET and GETDEVICEINFO XDR parsing to: - not use vmap, which doesn't work on incoherent archs - use xdr_stream parsing for all xdr Signed-off-by: Weston Andros Adamson <dros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4.1: turn off pNFS on ds connection failureAndy Adamson2011-03-111-4/+24
| | | | | | | | | | | | | | | | If a data server is unavailable, go through MDS. Mark the deviceid containing the data server as a negative cache entry. Do not try to connect to any data server on a deviceid marked as a negative cache entry. Mark any layout that tries to use the marked deviceid as failed. Inodes with a layout marked as fails will not use the layout for I/O, and will not perform any more layoutgets. Inodes without a layout will still do layoutget, but the layout will get marked immediately. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4.1 move deviceid cache to filelayout driverChristoph Hellwig2011-03-111-29/+77
| | | | | | | | | No need for generic cache with only one user. Keep a simple hash of deviceids in the filelayout driver. Signed-off-by: Christoph Hellwig <hch@infradead.org> Acked-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4.1: filelayout i/o helpersFred Isaman2011-03-111-0/+67
| | | | | | | | | | | | | | | | | | Prepare for filelayout_read_pagelist with helper functions that find the correct data server, filehandle, and offset. Signed-off-by: Andy Adamson <andros@citi.umich.edu> Signed-off-by: Dean Hildebrand <dhildeb@us.ibm.com> Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Marc Eshel <eshel@almaden.ibm.com> Signed-off-by: Mike Sager <sager@netapp.com> Signed-off-by: Oleg Drokin <green@linuxhacker.ru> Signed-off-by: Tao Guo <guotao@nrchpc.ac.cn> Signed-off-by: Tigran Mkrtchyan <tigran@anahit.desy.de> Signed-off-by: Tigran Mkrtchyan <tigran.mkrtchyan@desy.de> Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4.1: data server connectionAndy Adamson2011-03-111-0/+61
| | | | | | | | | | | | | Introduce a data server set_client and init session following the nfs4_set_client and nfs4_init_session convention. Once a new nfs_client is on the nfs_client_list, the nfs_client cl_cons_state serializes access to creating an nfs_client struct with matching properties. Use the new nfs_get_client() that initializes new clients. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs: add kmalloc return value check in decode_and_add_dsStanislav Fomichev2011-03-101-0/+4
| | | | | | | add kmalloc return value check in decode_and_add_ds Signed-off-by: Stanislav Fomichev <kernel@fomichev.me> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS4: Avoid potential NULL pointer dereference in decode_and_add_ds().Jesper Juhl2011-01-251-2/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | On Mon, 17 Jan 2011, Mi Jinlong wrote: > > > Jesper Juhl: > > strrchr() can return NULL if nothing is found. If this happens we'll > > dereference a NULL pointer in > > fs/nfs/nfs4filelayoutdev.c::decode_and_add_ds(). > > > > I tried to find some other code that guarantees that this can never > > happen but I was unsuccessful. So, unless someone else can point to some > > code that ensures this can never be a problem, I believe this patch is > > needed. > > > > While I was changing this code I also noticed that all the dprintk() > > statements, except one, start with "%s:". The one missing the ":" I added > > it to. > > Maybe another one also should be changed at decode_and_add_ds() at line 243: > > 243 printk("%s Decoded address and port %s\n", __func__, buf); > Missed that one. Thanks. Signed-off-by: Jesper Juhl <jj@chaosbits.net> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4.1: pnfs: filelayout: add driver's LAYOUTGET and GETDEVICEINFO ↵Andy Adamson2010-10-241-0/+448
infrastructure Implement the driver's io_ops->alloc_lseg and free_lseg functions, which integrate into the deviceid cache and calls out to nfs4_proc_getdeviceinfo when necessary. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Dean Hildebrand <dhildebz@umich.edu> Signed-off-by: Marc Eshel <eshel@almaden.ibm.com> Signed-off-by: Mike Sager <sager@netapp.com> Signed-off-by: Oleg Drokin <green@linuxhacker.ru> Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: Tao Guo <guotao@nrchpc.ac.cn> Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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