From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- fs/xfs/xfs_log.h | 158 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 158 insertions(+) create mode 100644 fs/xfs/xfs_log.h (limited to 'fs/xfs/xfs_log.h') diff --git a/fs/xfs/xfs_log.h b/fs/xfs/xfs_log.h new file mode 100644 index 000000000..73a64bf32 --- /dev/null +++ b/fs/xfs/xfs_log.h @@ -0,0 +1,158 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. + * All Rights Reserved. + */ +#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)