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2011-05-29NFSv4.1: change pg_test return type to boolBenny Halevy6-23/+22
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2011-05-29NFSv4.1: unify pnfs_pageio_init functionsBenny Halevy5-54/+27
Use common code for pnfs_pageio_init_{read,write} and use a common generic pg_test function. Note that this function always assumes the the layout driver's pg_test method is implemented. [Fix BUG] Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2011-05-29pnfs-obj: objlayout_encode_layoutcommit implementationBoaz Harrosh3-0/+61
* Define API for io-engines to report delta_space_used in IOs * Encode the osd-layout specific information of the layoutcommit XDR buffer. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2011-05-29pnfs: encode_layoutcommitBenny Halevy2-3/+17
Add a layout driver method to encode the layout type specific opaque part of layout commit in-line in the xdr stream. Currently, the pnfs-objects layout driver uses it to encode metadata hints to the MDS and the blocks layout driver to commit provisionally allocated extents to the file. Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2011-05-29pnfs-obj: report errors and .encode_layoutreturn Implementation.Boaz Harrosh3-2/+297
An io_state pre-allocates an error information structure for each possible osd-device that might error during IO. When IO is done if all was well the io_state is freed. (as today). If the I/O has ended with an error, the io_state is queued on a per-layout err_list. When eventually encode_layoutreturn() is called, each error is properly encoded on the XDR buffer and only then the io_state is removed from err_list and de-allocated. It is up to the io_engine to fill in the segment that fault and the type of osd_error that occurred. By calling objlayout_io_set_result() for each failing device. In objio_osd: * Allocate io-error descriptors space as part of io_state * Use generic objlayout error reporting at end of io. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2011-05-29pnfs: encode_layoutreturnAndy Adamson2-2/+11
Add a layout driver method to encode the layout type specific opaque part of layout return in-line in the xdr stream. Currently the pnfs-objects layout driver uses it to encode i/o error information on LAYOUTRETURN. Signed-off-by: Andy Adamson <andros@netapp.com> [fixup layout header pointer for encode_layoutreturn] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2011-05-29pnfs: layoutret_on_setattrBenny Halevy3-0/+26
With the objects layout security model, we have object capabilities that are associated with the layout and we anticipate that the server will issue a cb_layoutrecall for any setattr that changes security related attributes (user/group/mode/acl) or truncates the file. Therefore, the layout is returned before issuing the setattr to avoid the anticipated cb_layoutrecall. Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2011-05-29pnfs: layoutreturnBenny Halevy7-7/+274
NFSv4.1 LAYOUTRETURN implementation Currently, does not support layout-type payload encoding. Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Andy Adamson <andros@citi.umich.edu> Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Dean Hildebrand <dhildeb@us.ibm.com> Signed-off-by: Fred Isaman <iisaman@citi.umich.edu> Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Marc Eshel <eshel@almaden.ibm.com> Signed-off-by: Zhang Jingwang <zhangjingwang@nrchpc.ac.cn> [call pnfs_return_layout right before pnfs_destroy_layout] [remove assert_spin_locked from pnfs_clear_lseg_list] [remove wait parameter from the layoutreturn path.] [remove return_type field from nfs4_layoutreturn_args] [remove range from nfs4_layoutreturn_args] [no need to send layoutcommit from _pnfs_return_layout] [don't wait on sync layoutreturn] [fix layout stateid in layoutreturn args] [fixed NULL deref in _pnfs_return_layout] [removed recaim member of nfs4_layoutreturn_args] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2011-05-29pnfs-obj: osd raid engine read/write implementationBoaz Harrosh3-0/+901
With the use of the in-kernel osd library. Implement read/write of data from/to osd-objects according to information specified in the objects-layout. Support for stripping over mirrors with a received stripe_unit. There are however a few constrains which are not supported: 1. Stripe Unit must be a multiple of PAGE_SIZE 2. stripe length (stripe_unit * number_of_stripes) can not be bigger then 32bit. Also support raid-groups and partial-layout. Partial-layout is when not all the groups are received on the line, addressing only a partial range of the file. TODO: Only raid0! raid 4/5/6 support will come at later stage A none supported layout will send IO through the MDS [Important fallout from the last rebase] Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> [gfp_flags] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2011-05-29pnfs: support for non-rpc layout driversBenny Halevy5-4/+62
Non-rpc layout driver such as for objects and blocks implement their own I/O path and error handling logic. Therefore bypass NFS-based error handling for these layout drivers. [fix lseg ref-count bugs, and null de-refs] [Fall out from: non-rpc layout drivers] Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> [get rid of PNFS_USE_RPC_CODE] [get rid of __nfs4_write_done_cb] [revert useless change in nfs4_write_done_cb] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2011-05-29pnfs-obj: define per-inode private structureBenny Halevy3-0/+46
allocate and deallocate per-inode private pnfs_layout_hdr in preparation for I/O implementation. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2011-05-29pnfs: alloc and free layout_hdr layoutdriver methodsBenny Halevy2-3/+22
[gfp_flags] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2011-05-29pnfs-obj: objio_osd device information retrieval and cachingBoaz Harrosh3-0/+233
When a new layout is received in objio_alloc_lseg all device_ids referenced are retrieved. The device information is queried for from MDS and then the osd_device is looked-up from the osd-initiator library. The devices are cached in a per-mount-point list, for later use. At unmount all devices are "put" back to the library. objlayout_get_deviceinfo(), objlayout_put_deviceinfo() middleware API for retrieving device information given a device_id. TODO: The device cache can get big. Cap its size. Keep an LRU and start to return devices which were not used, when list gets to big, or when new entries allocation fail. [pnfs-obj: Bugs in new global-device-cache code] Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> [gfp_flags] [use global device cache] [use layout driver in global device cache] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2011-05-29pnfs-obj: decode layout, alloc/free lsegBoaz Harrosh4-2/+341
objlayout_alloc_lseg prepares an xdr_stream and calls the raid engins objio_alloc_lseg() to allocate a private pnfs_layout_segment. objio_osd.c::objio_alloc_lseg() uses passed xdr_stream to decode and store the layout_segment information in an objio_segment struct, using the pnfs_osd_xdr.h API for the actual parsing the layout xdr. objlayout_free_lseg calls objio_free_lseg() to free the allocated space. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> [gfp_flags] [removed "extern" from function definitions] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2011-05-29pnfs-obj: pnfs_osd XDR client implementationBoaz Harrosh2-1/+413
* Add the fs/nfs/objlayout/pnfs_osd_xdr_cli.c file, which will include the XDR encode/decode implementations for the pNFS client objlayout driver. [Wrong type in comments] Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com>