cregit-Linux how code gets into the kernel

Release 4.10 fs/xfs/xfs_log.h

Directory: fs/xfs
/*
 * 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; }

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christoph hellwigchristoph hellwig112100.00%2100.00%
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/* * 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; }

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christoph hellwigchristoph hellwig4086.96%150.00%
dave chinnerdave chinner613.04%150.00%
Total46100.00%2100.00%


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; }

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christoph hellwigchristoph hellwig66100.00%2100.00%
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/* * 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)<CYCLE_LSN(lsn2))? -999 : 999; if (BLOCK_LSN(lsn1) != BLOCK_LSN(lsn2)) return (BLOCK_LSN(lsn1)<BLOCK_LSN(lsn2))? -999 : 999; return 0; }

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christoph hellwigchristoph hellwig6484.21%150.00%
andrew mortonandrew morton1215.79%150.00%
Total76100.00%2100.00%

#define XFS_LSN_CMP(x,y) _lsn_cmp(x,y) /* * Flags to xfs_log_force() * * XFS_LOG_SYNC: Synchronous force in-core log to disk */ #define XFS_LOG_SYNC 0x1 /* Log manager interfaces */ struct xfs_mount; struct xlog_in_core; struct xlog_ticket; struct xfs_log_item; struct xfs_item_ops; struct xfs_trans; struct xfs_log_callback; xfs_lsn_t xfs_log_done(struct xfs_mount *mp, struct xlog_ticket *ticket, struct xlog_in_core **iclog, bool regrant); int _xfs_log_force(struct xfs_mount *mp, uint flags, int *log_forced); void xfs_log_force(struct xfs_mount *mp, uint flags); int _xfs_log_force_lsn(struct xfs_mount *mp, xfs_lsn_t lsn, uint flags, int *log_forced); void xfs_log_force_lsn(struct xfs_mount *mp, xfs_lsn_t lsn, uint flags); int xfs_log_mount(struct xfs_mount *mp, struct xfs_buftarg *log_target, xfs_daddr_t start_block, int num_bblocks); int xfs_log_mount_finish(struct xfs_mount *mp); int xfs_log_mount_cancel(struct xfs_mount *); xfs_lsn_t xlog_assign_tail_lsn(struct xfs_mount *mp); xfs_lsn_t xlog_assign_tail_lsn_locked(struct xfs_mount *mp); void xfs_log_space_wake(struct xfs_mount *mp); int xfs_log_notify(struct xfs_mount *mp, struct xlog_in_core *iclog, struct xfs_log_callback *callback_entry); int xfs_log_release_iclog(struct xfs_mount *mp, struct xlog_in_core *iclog); int xfs_log_reserve(struct xfs_mount *mp, int length, int count, struct xlog_ticket **ticket, __uint8_t clientid, bool permanent); int xfs_log_regrant(struct xfs_mount *mp, struct xlog_ticket *tic); void xfs_log_unmount(struct xfs_mount *mp); int xfs_log_force_umount(struct xfs_mount *mp, int logerror); struct xlog_ticket *xfs_log_ticket_get(struct xlog_ticket *ticket); void xfs_log_ticket_put(struct xlog_ticket *ticket); void xfs_log_commit_cil(struct xfs_mount *mp, struct xfs_trans *tp, xfs_lsn_t *commit_lsn, bool regrant); bool xfs_log_item_in_current_chkpt(struct xfs_log_item *lip); void xfs_log_work_queue(struct xfs_mount *mp); void xfs_log_quiesce(struct xfs_mount *mp); bool xfs_log_check_lsn(struct xfs_mount *, xfs_lsn_t); #endif /* __XFS_LOG_H__ */

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christoph hellwigchristoph hellwig52370.01%1338.24%
dave chinnerdave chinner13918.61%1029.41%
david chinnerdavid chinner304.02%25.88%
brian fosterbrian foster182.41%25.88%
andrew mortonandrew morton121.61%12.94%
glen overbyglen overby111.47%12.94%
stephen lordstephen lord111.47%25.88%
nathan scottnathan scott20.27%25.88%
jeff liujeff liu10.13%12.94%
Total747100.00%34100.00%
Directory: fs/xfs
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