/* * 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)grant_table.h20945logplain d---------hvm72logplain d---------io429logplain -rw-r--r--memory.h8664logplain -rw-r--r--nmi.h1507logplain