/* * 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 * Boaz Harrosh * * 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 #include #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 */ '/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&id=54791b276b4000b307339f269d3bf7db877d536f'>1c2616bd373ce5ea28aac2a53e32f5b5834901ce /tools/testing/selftests/capabilities parent5d0e7705774dd412a465896d08d59a81a345c1e4 (diff)parent047487241ff59374fded8c477f21453681f5995c (diff)
Merge branch 'sparc64-non-resumable-user-error-recovery'
Liam R. Howlett says: ==================== sparc64: Recover from userspace non-resumable PIO & MEM errors A non-resumable error from userspace is able to cause a kernel panic or trap loop due to the setup and handling of the queued traps once in the kernel. This patch series addresses both of these issues. The queues are fixed by simply zeroing the memory before use. PIO errors from userspace will result in a SIGBUS being sent to the user process. The MEM errors form userspace will result in a SIGKILL and also cause the offending pages to be claimed so they are no longer used in future tasks. SIGKILL is used to ensure that the process does not try to coredump and result in an attempt to read the memory again from within kernel space. Although there is a HV call to scrub the memory (mem_scrub), there is no easy way to guarantee that the real memory address(es) are not used by other tasks. Clearing the error with mem_scrub would zero the memory and cause the other processes to proceed with bad data. The handling of other non-resumable errors remain unchanged and will cause a panic. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/testing/selftests/capabilities')