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path: root/fs/nfs/pnfs_dev.c
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* NFSv4.1: do not use deviceids after MDS clientid invalidationAndy Adamson2011-07-121-0/+20
| | | | | | | | | | | Mark all deviceids established under an expired MDS clientid as invalid. Stop all new i/o through DS and send through the MDS. Don't use any new LAYOUTGETs that use the invalid deviceid. Purge all layouts established under the expired MDS clientid. Remove the MDS clientid deviceid and data servers reference Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4.1: Clean ups for the device id cacheTrond Myklebust2011-07-121-33/+11
| | | | | | | | | | | | The fact that the global device id cache holds a reference to the nfs4_deviceid_node until it is invisible to rcu lookups implies that we can always assume that the reference count is non-zero in _find_get_deviceid. Also clean up nfs4_put_deviceid_node and the removal of the device id from the cache. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4.1: Fix a refcounting issue in the pNFS device id cacheTrond Myklebust2011-06-151-0/+1
| | | | | | | When we add something to the global device id cache, we need to bump the reference count, so that the cache itself holds a reference. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: fix umount of pnfs filesystemsWeston Andros Adamson2011-06-151-5/+11
| | | | | | | | | | | Unmounting a pnfs filesystem hangs using filelayout and possibly others. This fixes the use of the rcu protected node by making use of a new 'tmpnode' for the temporary purge list. Also, the spinlock shouldn't be held when calling synchronize_rcu(). Signed-off-by: Weston Andros Adamson <dros@netapp.com> Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4.1: use layout driver in global device cacheBenny Halevy2011-05-291-11/+17
| | | | | | | | | | | pnfs deviceids are unique per server, per layout type. struct nfs_client is currently used to distinguish deviceids from different nfs servers, yet these may clash between different layout types on the same server. Therefore, use the layout driver associated with each deviceid at insertion time to look it up, unhash, or delete it. Signed-off-by: Benny Halevy <bhalevy@panasas.com>
* pnfs: CB_NOTIFY_DEVICEIDMarc Eshel2011-05-291-14/+81
| | | | | | | | | | | | | | | | Note: This functionlaity is incomplete as all layout segments referring to the 'to be removed device id' need to be reaped, and all in flight I/O drained. [use be32 res in nfs4_callback_devicenotify] [use nfs_client to qualify deviceid for cb_notify_deviceid] [use global deviceid cache for CB_NOTIFY_DEVICEID] [refactor device cache _lookup_deviceid] [refactor device cache _find_get_deviceid] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Bug in new global-device-cache code] [layout_driver MUST set free_deviceid_node if using dev-cache] Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com>
* NFSv4.1: purge deviceid cache on nfs_free_clientBenny Halevy2011-05-291-3/+44
| | | | | | | | | | | | | | 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 Halevy2011-05-291-0/+156
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>
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