/* * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. * All Rights Reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it would be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef __XFS_LOG_H__ #define __XFS_LOG_H__ struct xfs_log_vec { struct xfs_log_vec *lv_next; /* next lv in build list */ int lv_niovecs; /* number of iovecs in lv */ struct xfs_log_iovec *lv_iovecp; /* iovec array */ struct xfs_log_item *lv_item; /* owner */ char *lv_buf; /* formatted buffer */ int lv_bytes; /* accounted space in buffer */ int lv_buf_len; /* aligned size of buffer */ int lv_size; /* size of allocated lv */ }; #define XFS_LOG_VEC_ORDERED (-1) static inline void * xlog_prepare_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec **vecp, uint type) { struct xfs_log_iovec *vec = *vecp; if (vec) { ASSERT(vec - lv->lv_iovecp < lv->lv_niovecs); vec++; } else { vec = &lv->lv_iovecp[0]; } vec->i_type = type; vec->i_addr = lv->lv_buf + lv->lv_buf_len; ASSERT(IS_ALIGNED((unsigned long)vec->i_addr, sizeof(uint64_t))); *vecp = vec; return vec->i_addr; } /* * We need to make sure the next buffer is naturally aligned for the biggest * basic data type we put into it. We already accounted for this padding when * sizing the buffer. * * However, this padding does not get written into the log, and hence we have to * track the space used by the log vectors separately to prevent log space hangs * due to inaccurate accounting (i.e. a leak) of the used log space through the * CIL context ticket. */ static inline void xlog_finish_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec *vec, int len) { lv->lv_buf_len += round_up(len, sizeof(uint64_t)); lv->lv_bytes += len; vec->i_len = len; } static inline void * xlog_copy_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec **vecp, uint type, void *data, int len) { void *buf; buf = xlog_prepare_iovec(lv, vecp, type); memcpy(buf, data, len); xlog_finish_iovec(lv, *vecp, len); return buf; } /* * Structure used to pass callback function and the function's argument * to the log manager. */ typedef struct xfs_log_callback { struct xfs_log_callback *cb_next; void (*cb_func)(void *, int); void *cb_arg; } xfs_log_callback_t; /* * By comparing each component, we don't have to worry about extra * endian issues in treating two 32 bit numbers as one 64 bit number */ static inline xfs_lsn_t _lsn_cmp(xfs_lsn_t lsn1, xfs_lsn_t lsn2) { if (CYCLE_LSN(lsn1) != CYCLE_LSN(lsn2)) return (CYCLE_LSN(lsn1)patch) tree098a7c0ca4fceb8a65cb1f693c9d71990388933d /include/rdma/ib_umem.h parenta0615a16f7d0ceb5804d295203c302d496d8ee91 (diff)
powerpc/mm: Fix spurrious segfaults on radix with autonuma
When autonuma (Automatic NUMA balancing) marks a PTE inaccessible it clears all the protection bits but leave the PTE valid. With the Radix MMU, an attempt at executing from such a PTE will take a fault with bit 35 of SRR1 set "SRR1_ISI_N_OR_G". It is thus incorrect to treat all such faults as errors. We should pass them to handle_mm_fault() for autonuma to deal with. The case of pages that are really not executable is handled by the existing test for VM_EXEC further down. That leaves us with catching the kernel attempts at executing user pages. We can catch that earlier, even before we do find_vma. It is never valid on powerpc for the kernel to take an exec fault to begin with. So fold that test with the existing test for the kernel faulting on kernel addresses to bail out early. Fixes: 1d18ad026844 ("powerpc/mm: Detect instruction fetch denied and report") Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'include/rdma/ib_umem.h')