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Diffstat (limited to 'fs/nfs/objlayout/objlayout.h')
| -rw-r--r-- | fs/nfs/objlayout/objlayout.h | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/fs/nfs/objlayout/objlayout.h b/fs/nfs/objlayout/objlayout.h deleted file mode 100644 index fc94a58..0000000 --- a/fs/nfs/objlayout/objlayout.h +++ /dev/null @@ -1,183 +0,0 @@ -/* - * Data types and function declerations for interfacing with the - * pNFS standard object layout driver. - * - * Copyright (C) 2007 Panasas Inc. [year of first publication] - * All rights reserved. - * - * Benny Halevy <bhalevy@panasas.com> - * Boaz Harrosh <ooo@electrozaur.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 - * See the file COPYING included with this distribution for more details. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the Panasas company nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE - * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR - * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF - * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING - * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS - * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#ifndef _OBJLAYOUT_H -#define _OBJLAYOUT_H - -#include <linux/nfs_fs.h> -#include <linux/pnfs_osd_xdr.h> -#include "../pnfs.h" - -/* - * per-inode layout - */ -struct objlayout { - struct pnfs_layout_hdr pnfs_layout; - - /* for layout_commit */ - enum osd_delta_space_valid_enum { - OBJ_DSU_INIT = 0, - OBJ_DSU_VALID, - OBJ_DSU_INVALID, - } delta_space_valid; - s64 delta_space_used; /* consumed by write ops */ - - /* for layout_return */ - spinlock_t lock; - struct list_head err_list; -}; - -static inline struct objlayout * -OBJLAYOUT(struct pnfs_layout_hdr *lo) -{ - return container_of(lo, struct objlayout, pnfs_layout); -} - -/* - * per-I/O operation state - * embedded in objects provider io_state data structure - */ -struct objlayout_io_res { - struct objlayout *objlay; - - void *rpcdata; - int status; /* res */ - int committed; /* res */ - - /* Error reporting (layout_return) */ - struct list_head err_list; - unsigned num_comps; - /* Pointer to array of error descriptors of size num_comps. - * It should contain as many entries as devices in the osd_layout - * that participate in the I/O. It is up to the io_engine to allocate - * needed space and set num_comps. - */ - struct pnfs_osd_ioerr *ioerrs; -}; - -static inline -void objlayout_init_ioerrs(struct objlayout_io_res *oir, unsigned num_comps, - struct pnfs_osd_ioerr *ioerrs, void *rpcdata, - struct pnfs_layout_hdr *pnfs_layout_type) -{ - oir->objlay = OBJLAYOUT(pnfs_layout_type); - oir->rpcdata = rpcdata; - INIT_LIST_HEAD(&oir->err_list); - oir->num_comps = num_comps; - oir->ioerrs = ioerrs; -} - -/* - * Raid engine I/O API - */ -extern int objio_alloc_lseg(struct pnfs_layout_segment **outp, - struct pnfs_layout_hdr *pnfslay, - struct pnfs_layout_range *range, - struct xdr_stream *xdr, - gfp_t gfp_flags); -extern void objio_free_lseg(struct pnfs_layout_segment *lseg); - -/* objio_free_result will free these @oir structs received from - * objlayout_{read,write}_done - */ -extern void objio_free_result(struct objlayout_io_res *oir); - -extern int objio_read_pagelist(struct nfs_pgio_header *rdata); -extern int objio_write_pagelist(struct nfs_pgio_header *wdata, int how); - -/* - * callback API - */ -extern void objlayout_io_set_result(struct objlayout_io_res *oir, - unsigned index, struct pnfs_osd_objid *pooid, - int osd_error, u64 offset, u64 length, bool is_write); - -static inline void -objlayout_add_delta_space_used(struct objlayout *objlay, s64 space_used) -{ - /* If one of the I/Os errored out and the delta_space_used was - * invalid we render the complete report as invalid. Protocol mandate - * the DSU be accurate or not reported. - */ - spin_lock(&objlay->lock); - if (objlay->delta_space_valid != OBJ_DSU_INVALID) { - objlay->delta_space_valid = OBJ_DSU_VALID; - objlay->delta_space_used += space_used; - } - spin_unlock(&objlay->lock); -} - -extern void objlayout_read_done(struct objlayout_io_res *oir, - ssize_t status, bool sync); -extern void objlayout_write_done(struct objlayout_io_res *oir, - ssize_t status, bool sync); - -/* - * exported generic objects function vectors - */ - -extern struct pnfs_layout_hdr *objlayout_alloc_layout_hdr(struct inode *, gfp_t gfp_flags); -extern void objlayout_free_layout_hdr(struct pnfs_layout_hdr *); - -extern struct pnfs_layout_segment *objlayout_alloc_lseg( - struct pnfs_layout_hdr *, - struct nfs4_layoutget_res *, - gfp_t gfp_flags); -extern void objlayout_free_lseg(struct pnfs_layout_segment *); - -extern enum pnfs_try_status objlayout_read_pagelist( - struct nfs_pgio_header *); - -extern enum pnfs_try_status objlayout_write_pagelist( - struct nfs_pgio_header *, - int how); - -extern void objlayout_encode_layoutcommit( - struct pnfs_layout_hdr *, - struct xdr_stream *, - const struct nfs4_layoutcommit_args *); - -extern void objlayout_encode_layoutreturn( - struct xdr_stream *, - const struct nfs4_layoutreturn_args *); - -extern int objlayout_autologin(struct pnfs_osd_deviceaddr *deviceaddr); - -#endif /* _OBJLAYOUT_H */ |
