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NetBSD/sys/ufs/lfs/lfs.h
perseant 9234ba6fd8 Change references to SEGM_W_DIROPS to SEGM_CKP, and replace the logic that 
formerly used SEGM_W_DIROPS in lfs_segwrite() appropriately.  This prevents
a problem in which processes could get stuck in "buffers" sleep forever.
2007-05-16 19:11:37 +00:00

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/* $NetBSD: lfs.h,v 1.120 2007/05/16 19:11:37 perseant Exp $ */
/*-
* Copyright (c) 1999, 2000, 2001, 2002, 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Konrad E. Schroder <perseant@hhhh.org>.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION 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.
*/
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* 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 University 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 BY THE REGENTS AND CONTRIBUTORS ``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.
*
* @(#)lfs.h 8.9 (Berkeley) 5/8/95
*/
#ifndef _UFS_LFS_LFS_H_
#define _UFS_LFS_LFS_H_
#include <sys/rwlock.h>
/*
* Compile-time options for LFS.
*/
#define LFS_IFIND_RETRIES 16
#define LFS_LOGLENGTH 1024 /* size of debugging log */
#define LFS_MAX_ACTIVE 10 /* Dirty segments before ckp forced */
/*
* Fixed filesystem layout parameters
*/
#define LFS_LABELPAD 8192 /* LFS label size */
#define LFS_SBPAD 8192 /* LFS superblock size */
#define LFS_UNUSED_INUM 0 /* 0: out of band inode number */
#define LFS_IFILE_INUM 1 /* 1: IFILE inode number */
/* 2: Root inode number */
#define LOSTFOUNDINO 3 /* 3: lost+found inode number */
#define LFS_FIRST_INUM 4 /* 4: first free inode number */
#define LFS_V1_SUMMARY_SIZE 512 /* V1 fixed summary size */
#define LFS_DFL_SUMMARY_SIZE 512 /* Default summary size */
#define LFS_MAX_DADDR 0x7fffffff /* Highest addressable fsb */
#define LFS_MAXNAMLEN 255 /* maximum name length in a dir */
/* Adjustable filesystem parameters */
#define MIN_FREE_SEGS 20
#define MIN_RESV_SEGS 15
#ifndef LFS_ATIME_IFILE
# define LFS_ATIME_IFILE 0 /* Store atime info in ifile (optional in LFSv1) */
#endif
#define LFS_MARKV_MAXBLKCNT 65536 /* Max block count for lfs_markv() */
/* Misc. definitions */
#define BW_CLEAN 1 /* Flag for lfs_bwrite_ext() */
#define PG_DELWRI PG_PAGER1 /* Local def for delayed pageout */
/* Resource limits */
#define LFS_MAX_RESOURCE(x, u) (((x) >> 2) - 10 * (u))
#define LFS_WAIT_RESOURCE(x, u) (((x) >> 1) - ((x) >> 3) - 10 * (u))
#define LFS_INVERSE_MAX_RESOURCE(x, u) (((x) + 10 * (u)) << 2)
#define LFS_MAX_BUFS LFS_MAX_RESOURCE(nbuf, 1)
#define LFS_WAIT_BUFS LFS_WAIT_RESOURCE(nbuf, 1)
#define LFS_INVERSE_MAX_BUFS(n) LFS_INVERSE_MAX_RESOURCE(n, 1)
#define LFS_MAX_BYTES LFS_MAX_RESOURCE(bufmem_lowater, PAGE_SIZE)
#define LFS_INVERSE_MAX_BYTES(n) LFS_INVERSE_MAX_RESOURCE(n, PAGE_SIZE)
#define LFS_WAIT_BYTES LFS_WAIT_RESOURCE(bufmem_lowater, PAGE_SIZE)
#define LFS_MAX_DIROP ((desiredvnodes >> 2) + (desiredvnodes >> 3))
#define SIZEOF_DIROP(fs) (2 * ((fs)->lfs_bsize + DINODE1_SIZE))
#define LFS_MAX_FSDIROP(fs) \
((fs)->lfs_nclean <= (fs)->lfs_resvseg ? 0 : \
(((fs)->lfs_nclean - (fs)->lfs_resvseg) * (fs)->lfs_ssize) / \
(2 * SIZEOF_DIROP(fs)))
#define LFS_MAX_PAGES lfs_max_pages()
#define LFS_WAIT_PAGES lfs_wait_pages()
#define LFS_BUFWAIT 2 /* How long to wait if over *_WAIT_* */
#ifdef _KERNEL
int lfs_wait_pages(void);
int lfs_max_pages(void);
#endif /* _KERNEL */
/* How starved can we be before we start holding back page writes */
#define LFS_STARVED_FOR_SEGS(fs) ((fs)->lfs_nclean < (fs)->lfs_resvseg)
/*
* Reserved blocks for lfs_malloc
*/
/* Structure to keep reserved blocks */
typedef struct lfs_res_blk {
void *p;
LIST_ENTRY(lfs_res_blk) res;
int size;
char inuse;
} res_t;
/* Types for lfs_newbuf and lfs_malloc */
#define LFS_NB_UNKNOWN -1
#define LFS_NB_SUMMARY 0
#define LFS_NB_SBLOCK 1
#define LFS_NB_IBLOCK 2
#define LFS_NB_CLUSTER 3
#define LFS_NB_CLEAN 4
#define LFS_NB_BLKIOV 5
#define LFS_NB_COUNT 6 /* always last */
/* Number of reserved memory blocks of each type */
#define LFS_N_SUMMARIES 2
#define LFS_N_SBLOCKS 1 /* Always 1, to throttle superblock writes */
#define LFS_N_IBLOCKS 16 /* In theory ssize/bsize; in practice around 2 */
#define LFS_N_CLUSTERS 16 /* In theory ssize/MAXPHYS */
#define LFS_N_CLEAN 0
#define LFS_N_BLKIOV 1
/* Total count of "large" (non-pool) types */
#define LFS_N_TOTAL (LFS_N_SUMMARIES + LFS_N_SBLOCKS + LFS_N_IBLOCKS + \
LFS_N_CLUSTERS + LFS_N_CLEAN + LFS_N_BLKIOV)
/* Counts for pool types */
#define LFS_N_CL LFS_N_CLUSTERS
#define LFS_N_BPP 2
#define LFS_N_SEG 2
/*
* "struct buf" associated definitions
*/
/* Unassigned disk addresses. */
#define UNASSIGNED -1
#define UNWRITTEN -2
/* Unused logical block number */
#define LFS_UNUSED_LBN -1
/* Determine if a buffer belongs to the ifile */
#define IS_IFILE(bp) (VTOI(bp->b_vp)->i_number == LFS_IFILE_INUM)
# define LFS_LOCK_BUF(bp) do { \
if (((bp)->b_flags & (B_LOCKED | B_CALL)) == 0) { \
simple_lock(&lfs_subsys_lock); \
++locked_queue_count; \
locked_queue_bytes += bp->b_bufsize; \
simple_unlock(&lfs_subsys_lock); \
} \
(bp)->b_flags |= B_LOCKED; \
} while (0)
# define LFS_UNLOCK_BUF(bp) do { \
if (((bp)->b_flags & (B_LOCKED | B_CALL)) == B_LOCKED) { \
simple_lock(&lfs_subsys_lock); \
--locked_queue_count; \
locked_queue_bytes -= bp->b_bufsize; \
if (locked_queue_count < LFS_WAIT_BUFS && \
locked_queue_bytes < LFS_WAIT_BYTES) \
wakeup(&locked_queue_count); \
simple_unlock(&lfs_subsys_lock); \
} \
(bp)->b_flags &= ~B_LOCKED; \
} while (0)
#ifdef _KERNEL
extern u_long bufmem_lowater, bufmem_hiwater; /* XXX */
# define LFS_IS_MALLOC_BUF(bp) (((bp)->b_flags & B_CALL) && \
(bp)->b_iodone == lfs_callback)
# ifdef DEBUG
# define LFS_DEBUG_COUNTLOCKED(m) do { \
if (lfs_debug_log_subsys[DLOG_LLIST]) { \
lfs_countlocked(&locked_queue_count, &locked_queue_bytes, (m)); \
wakeup(&locked_queue_count); \
} \
} while (0)
# else
# define LFS_DEBUG_COUNTLOCKED(m)
# endif
/* log for debugging writes to the Ifile */
# ifdef DEBUG
struct lfs_log_entry {
const char *op;
const char *file;
int pid;
int line;
daddr_t block;
unsigned long flags;
};
extern int lfs_lognum;
extern struct lfs_log_entry lfs_log[LFS_LOGLENGTH];
# define LFS_BWRITE_LOG(bp) lfs_bwrite_log((bp), __FILE__, __LINE__)
# define LFS_ENTER_LOG(theop, thefile, theline, lbn, theflags, thepid) do {\
int _s; \
\
simple_lock(&lfs_subsys_lock); \
_s = splbio(); \
lfs_log[lfs_lognum].op = theop; \
lfs_log[lfs_lognum].file = thefile; \
lfs_log[lfs_lognum].line = (theline); \
lfs_log[lfs_lognum].pid = (thepid); \
lfs_log[lfs_lognum].block = (lbn); \
lfs_log[lfs_lognum].flags = (theflags); \
lfs_lognum = (lfs_lognum + 1) % LFS_LOGLENGTH; \
splx(_s); \
simple_unlock(&lfs_subsys_lock); \
} while (0)
# define LFS_BCLEAN_LOG(fs, bp) do { \
if ((bp)->b_vp == (fs)->lfs_ivnode) \
LFS_ENTER_LOG("clear", __FILE__, __LINE__, \
bp->b_lblkno, bp->b_flags, curproc->p_pid);\
} while (0)
/* Must match list in lfs_vfsops.c ! */
# define DLOG_RF 0 /* roll forward */
# define DLOG_ALLOC 1 /* inode alloc */
# define DLOG_AVAIL 2 /* lfs_{,r,f}avail */
# define DLOG_FLUSH 3 /* flush */
# define DLOG_LLIST 4 /* locked list accounting */
# define DLOG_WVNODE 5 /* vflush/writevnodes verbose */
# define DLOG_VNODE 6 /* vflush/writevnodes */
# define DLOG_SEG 7 /* segwrite */
# define DLOG_SU 8 /* seguse accounting */
# define DLOG_CLEAN 9 /* cleaner routines */
# define DLOG_MOUNT 10 /* mount/unmount */
# define DLOG_PAGE 11 /* putpages/gop_write */
# define DLOG_DIROP 12 /* dirop accounting */
# define DLOG_MALLOC 13 /* lfs_malloc accounting */
# define DLOG_MAX 14 /* The terminator */
# define DLOG(a) lfs_debug_log a
# else /* ! DEBUG */
# define LFS_BCLEAN_LOG(fs, bp)
# define LFS_BWRITE_LOG(bp) VOP_BWRITE((bp))
# define DLOG(a)
# endif /* ! DEBUG */
#else /* ! _KERNEL */
# define LFS_BWRITE_LOG(bp) VOP_BWRITE((bp))
#endif /* _KERNEL */
#ifdef _KERNEL
/* Filehandle structure for exported LFSes */
struct lfid {
struct ufid lfid_ufid;
#define lfid_len lfid_ufid.ufid_len
#define lfid_ino lfid_ufid.ufid_ino
#define lfid_gen lfid_ufid.ufid_gen
uint32_t lfid_ident;
};
#endif /* _KERNEL */
/*
* "struct inode" associated definitions
*/
/* Address calculations for metadata located in the inode */
#define S_INDIR(fs) -NDADDR
#define D_INDIR(fs) (S_INDIR(fs) - NINDIR(fs) - 1)
#define T_INDIR(fs) (D_INDIR(fs) - NINDIR(fs) * NINDIR(fs) - 1)
/* For convenience */
#define IN_ALLMOD (IN_MODIFIED|IN_ACCESS|IN_CHANGE|IN_UPDATE|IN_MODIFY|IN_ACCESSED|IN_CLEANING)
#define LFS_SET_UINO(ip, flags) do { \
simple_lock(&(ip)->i_lfs->lfs_interlock); \
if (((flags) & IN_ACCESSED) && !((ip)->i_flag & IN_ACCESSED)) \
++(ip)->i_lfs->lfs_uinodes; \
if (((flags) & IN_CLEANING) && !((ip)->i_flag & IN_CLEANING)) \
++(ip)->i_lfs->lfs_uinodes; \
if (((flags) & IN_MODIFIED) && !((ip)->i_flag & IN_MODIFIED)) \
++(ip)->i_lfs->lfs_uinodes; \
(ip)->i_flag |= (flags); \
simple_unlock(&(ip)->i_lfs->lfs_interlock); \
} while (0)
#define LFS_CLR_UINO(ip, flags) do { \
simple_lock(&(ip)->i_lfs->lfs_interlock); \
if (((flags) & IN_ACCESSED) && ((ip)->i_flag & IN_ACCESSED)) \
--(ip)->i_lfs->lfs_uinodes; \
if (((flags) & IN_CLEANING) && ((ip)->i_flag & IN_CLEANING)) \
--(ip)->i_lfs->lfs_uinodes; \
if (((flags) & IN_MODIFIED) && ((ip)->i_flag & IN_MODIFIED)) \
--(ip)->i_lfs->lfs_uinodes; \
(ip)->i_flag &= ~(flags); \
if ((ip)->i_lfs->lfs_uinodes < 0) { \
panic("lfs_uinodes < 0"); \
} \
simple_unlock(&(ip)->i_lfs->lfs_interlock); \
} while (0)
#define LFS_ITIMES(ip, acc, mod, cre) \
while ((ip)->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY)) \
lfs_itimes(ip, acc, mod, cre)
/*
* "struct vnode" associated definitions
*/
/* Heuristic emptiness measure */
#define VPISEMPTY(vp) (LIST_EMPTY(&(vp)->v_dirtyblkhd) && \
!(vp->v_type == VREG && (vp)->v_flag & VONWORKLST) &&\
VTOI(vp)->i_lfs_nbtree == 0)
#define WRITEINPROG(vp) ((vp)->v_numoutput > 0 || \
(!LIST_EMPTY(&(vp)->v_dirtyblkhd) && \
!(VTOI(vp)->i_flag & (IN_MODIFIED | IN_ACCESSED | IN_CLEANING))))
/*
* On-disk and in-memory checkpoint segment usage structure.
*/
typedef struct segusage SEGUSE;
struct segusage {
u_int32_t su_nbytes; /* 0: number of live bytes */
u_int32_t su_olastmod; /* 4: SEGUSE last modified timestamp */
u_int16_t su_nsums; /* 8: number of summaries in segment */
u_int16_t su_ninos; /* 10: number of inode blocks in seg */
#define SEGUSE_ACTIVE 0x01 /* segment currently being written */
#define SEGUSE_DIRTY 0x02 /* segment has data in it */
#define SEGUSE_SUPERBLOCK 0x04 /* segment contains a superblock */
#define SEGUSE_ERROR 0x08 /* cleaner: do not clean segment */
#define SEGUSE_EMPTY 0x10 /* segment is empty */
#define SEGUSE_INVAL 0x20 /* segment is invalid */
u_int32_t su_flags; /* 12: segment flags */
u_int64_t su_lastmod; /* 16: last modified timestamp */
};
typedef struct segusage_v1 SEGUSE_V1;
struct segusage_v1 {
u_int32_t su_nbytes; /* 0: number of live bytes */
u_int32_t su_lastmod; /* 4: SEGUSE last modified timestamp */
u_int16_t su_nsums; /* 8: number of summaries in segment */
u_int16_t su_ninos; /* 10: number of inode blocks in seg */
u_int32_t su_flags; /* 12: segment flags */
};
#define SEGUPB(fs) (fs->lfs_sepb)
#define SEGTABSIZE_SU(fs) \
(((fs)->lfs_nseg + SEGUPB(fs) - 1) / (fs)->lfs_sepb)
#ifdef _KERNEL
# define SHARE_IFLOCK(F) \
do { \
simple_lock(&(F)->lfs_interlock); \
lockmgr(&(F)->lfs_iflock, LK_SHARED, &(F)->lfs_interlock); \
simple_unlock(&(F)->lfs_interlock); \
} while(0)
# define UNSHARE_IFLOCK(F) \
do { \
simple_lock(&(F)->lfs_interlock); \
lockmgr(&(F)->lfs_iflock, LK_RELEASE, &(F)->lfs_interlock); \
simple_unlock(&(F)->lfs_interlock); \
} while(0)
#else /* ! _KERNEL */
# define SHARE_IFLOCK(F)
# define UNSHARE_IFLOCK(F)
#endif /* ! _KERNEL */
/* Read in the block with a specific segment usage entry from the ifile. */
#define LFS_SEGENTRY(SP, F, IN, BP) do { \
int _e; \
SHARE_IFLOCK(F); \
VTOI((F)->lfs_ivnode)->i_flag |= IN_ACCESS; \
if ((_e = bread((F)->lfs_ivnode, \
((IN) / (F)->lfs_sepb) + (F)->lfs_cleansz, \
(F)->lfs_bsize, NOCRED, &(BP))) != 0) \
panic("lfs: ifile read: %d", _e); \
if ((F)->lfs_version == 1) \
(SP) = (SEGUSE *)((SEGUSE_V1 *)(BP)->b_data + \
((IN) & ((F)->lfs_sepb - 1))); \
else \
(SP) = (SEGUSE *)(BP)->b_data + ((IN) % (F)->lfs_sepb); \
UNSHARE_IFLOCK(F); \
} while (0)
#define LFS_WRITESEGENTRY(SP, F, IN, BP) do { \
if ((SP)->su_nbytes == 0) \
(SP)->su_flags |= SEGUSE_EMPTY; \
else \
(SP)->su_flags &= ~SEGUSE_EMPTY; \
(F)->lfs_suflags[(F)->lfs_activesb][(IN)] = (SP)->su_flags; \
LFS_BWRITE_LOG(BP); \
} while (0)
/*
* On-disk file information. One per file with data blocks in the segment.
*/
typedef struct finfo FINFO;
struct finfo {
u_int32_t fi_nblocks; /* number of blocks */
u_int32_t fi_version; /* version number */
u_int32_t fi_ino; /* inode number */
u_int32_t fi_lastlength; /* length of last block in array */
int32_t fi_blocks[1]; /* array of logical block numbers */
};
/* sizeof FINFO except fi_blocks */
#define FINFOSIZE (sizeof(FINFO) - sizeof(int32_t))
/*
* Index file inode entries.
*/
typedef struct ifile IFILE;
struct ifile {
u_int32_t if_version; /* inode version number */
#define LFS_UNUSED_DADDR 0 /* out-of-band daddr */
int32_t if_daddr; /* inode disk address */
#define LFS_ORPHAN_NEXTFREE (~(u_int32_t)0) /* indicate orphaned file */
u_int32_t if_nextfree; /* next-unallocated inode */
u_int32_t if_atime_sec; /* Last access time, seconds */
u_int32_t if_atime_nsec; /* and nanoseconds */
};
typedef struct ifile_v1 IFILE_V1;
struct ifile_v1 {
u_int32_t if_version; /* inode version number */
int32_t if_daddr; /* inode disk address */
u_int32_t if_nextfree; /* next-unallocated inode */
#if LFS_ATIME_IFILE
struct timespec if_atime; /* Last access time */
#endif
};
/*
* LFSv1 compatibility code is not allowed to touch if_atime, since it
* may not be mapped!
*/
/* Read in the block with a specific inode from the ifile. */
#define LFS_IENTRY(IP, F, IN, BP) do { \
int _e; \
SHARE_IFLOCK(F); \
VTOI((F)->lfs_ivnode)->i_flag |= IN_ACCESS; \
if ((_e = bread((F)->lfs_ivnode, \
(IN) / (F)->lfs_ifpb + (F)->lfs_cleansz + (F)->lfs_segtabsz, \
(F)->lfs_bsize, NOCRED, &(BP))) != 0) \
panic("lfs: ifile ino %d read %d", (int)(IN), _e); \
if ((F)->lfs_version == 1) \
(IP) = (IFILE *)((IFILE_V1 *)(BP)->b_data + \
(IN) % (F)->lfs_ifpb); \
else \
(IP) = (IFILE *)(BP)->b_data + (IN) % (F)->lfs_ifpb; \
UNSHARE_IFLOCK(F); \
} while (0)
/*
* Cleaner information structure. This resides in the ifile and is used
* to pass information from the kernel to the cleaner.
*/
typedef struct _cleanerinfo {
u_int32_t clean; /* number of clean segments */
u_int32_t dirty; /* number of dirty segments */
int32_t bfree; /* disk blocks free */
int32_t avail; /* disk blocks available */
u_int32_t free_head; /* head of the inode free list */
u_int32_t free_tail; /* tail of the inode free list */
#define LFS_CLEANER_MUST_CLEAN 0x01
u_int32_t flags; /* status word from the kernel */
} CLEANERINFO;
#define CLEANSIZE_SU(fs) \
((sizeof(CLEANERINFO) + (fs)->lfs_bsize - 1) >> (fs)->lfs_bshift)
/* Read in the block with the cleaner info from the ifile. */
#define LFS_CLEANERINFO(CP, F, BP) do { \
SHARE_IFLOCK(F); \
VTOI((F)->lfs_ivnode)->i_flag |= IN_ACCESS; \
if (bread((F)->lfs_ivnode, \
(daddr_t)0, (F)->lfs_bsize, NOCRED, &(BP))) \
panic("lfs: ifile read"); \
(CP) = (CLEANERINFO *)(BP)->b_data; \
UNSHARE_IFLOCK(F); \
} while (0)
/*
* Synchronize the Ifile cleaner info with current avail and bfree.
*/
#define LFS_SYNC_CLEANERINFO(cip, fs, bp, w) do { \
simple_lock(&(fs)->lfs_interlock); \
if ((w) || (cip)->bfree != (fs)->lfs_bfree || \
(cip)->avail != (fs)->lfs_avail - (fs)->lfs_ravail - \
(fs)->lfs_favail) { \
(cip)->bfree = (fs)->lfs_bfree; \
(cip)->avail = (fs)->lfs_avail - (fs)->lfs_ravail - \
(fs)->lfs_favail; \
if (((bp)->b_flags & B_GATHERED) == 0) { \
(fs)->lfs_flags |= LFS_IFDIRTY; \
} \
simple_unlock(&(fs)->lfs_interlock); \
(void) LFS_BWRITE_LOG(bp); /* Ifile */ \
} else { \
simple_unlock(&(fs)->lfs_interlock); \
brelse(bp); \
} \
} while (0)
/*
* Get the head of the inode free list.
* Always caled with the segment lock held.
*/
#define LFS_GET_HEADFREE(FS, CIP, BP, FREEP) do { \
if ((FS)->lfs_version > 1) { \
LFS_CLEANERINFO((CIP), (FS), (BP)); \
(FS)->lfs_freehd = (CIP)->free_head; \
brelse(BP); \
} \
*(FREEP) = (FS)->lfs_freehd; \
} while (0)
#define LFS_PUT_HEADFREE(FS, CIP, BP, VAL) do { \
(FS)->lfs_freehd = (VAL); \
if ((FS)->lfs_version > 1) { \
LFS_CLEANERINFO((CIP), (FS), (BP)); \
(CIP)->free_head = (VAL); \
LFS_BWRITE_LOG(BP); \
simple_lock(&fs->lfs_interlock); \
(FS)->lfs_flags |= LFS_IFDIRTY; \
simple_unlock(&fs->lfs_interlock); \
} \
} while (0)
#define LFS_GET_TAILFREE(FS, CIP, BP, FREEP) do { \
LFS_CLEANERINFO((CIP), (FS), (BP)); \
*(FREEP) = (CIP)->free_tail; \
brelse(BP); \
} while (0)
#define LFS_PUT_TAILFREE(FS, CIP, BP, VAL) do { \
LFS_CLEANERINFO((CIP), (FS), (BP)); \
(CIP)->free_tail = (VAL); \
LFS_BWRITE_LOG(BP); \
simple_lock(&fs->lfs_interlock); \
(FS)->lfs_flags |= LFS_IFDIRTY; \
simple_unlock(&fs->lfs_interlock); \
} while (0)
/*
* On-disk segment summary information
*/
typedef struct segsum_v1 SEGSUM_V1;
struct segsum_v1 {
u_int32_t ss_sumsum; /* 0: check sum of summary block */
u_int32_t ss_datasum; /* 4: check sum of data */
u_int32_t ss_magic; /* 8: segment summary magic number */
#define SS_MAGIC 0x061561
int32_t ss_next; /* 12: next segment */
u_int32_t ss_create; /* 16: creation time stamp */
u_int16_t ss_nfinfo; /* 20: number of file info structures */
u_int16_t ss_ninos; /* 22: number of inodes in summary */
#define SS_DIROP 0x01 /* segment begins a dirop */
#define SS_CONT 0x02 /* more partials to finish this write*/
#define SS_CLEAN 0x04 /* written by the cleaner */
#define SS_RFW 0x08 /* written by the roll-forward agent */
u_int16_t ss_flags; /* 24: used for directory operations */
u_int16_t ss_pad; /* 26: extra space */
/* FINFO's and inode daddr's... */
};
typedef struct segsum SEGSUM;
struct segsum {
u_int32_t ss_sumsum; /* 0: check sum of summary block */
u_int32_t ss_datasum; /* 4: check sum of data */
u_int32_t ss_magic; /* 8: segment summary magic number */
int32_t ss_next; /* 12: next segment */
u_int32_t ss_ident; /* 16: roll-forward fsid */
#define ss_ocreate ss_ident /* ident is where create was in v1 */
u_int16_t ss_nfinfo; /* 20: number of file info structures */
u_int16_t ss_ninos; /* 22: number of inodes in summary */
u_int16_t ss_flags; /* 24: used for directory operations */
u_int8_t ss_pad[6]; /* 26: extra space */
u_int64_t ss_serial; /* 32: serial number */
u_int64_t ss_create; /* 40: time stamp */
/* FINFO's and inode daddr's... */
};
#define SEGSUM_SIZE(fs) ((fs)->lfs_version == 1 ? sizeof(SEGSUM_V1) : sizeof(SEGSUM))
/*
* On-disk super block.
*/
struct dlfs {
#define LFS_MAGIC 0x070162
u_int32_t dlfs_magic; /* 0: magic number */
#define LFS_VERSION 2
u_int32_t dlfs_version; /* 4: version number */
u_int32_t dlfs_size; /* 8: number of blocks in fs (v1) */
/* number of frags in fs (v2) */
u_int32_t dlfs_ssize; /* 12: number of blocks per segment (v1) */
/* number of bytes per segment (v2) */
u_int32_t dlfs_dsize; /* 16: number of disk blocks in fs */
u_int32_t dlfs_bsize; /* 20: file system block size */
u_int32_t dlfs_fsize; /* 24: size of frag blocks in fs */
u_int32_t dlfs_frag; /* 28: number of frags in a block in fs */
/* Checkpoint region. */
u_int32_t dlfs_freehd; /* 32: start of the free list */
int32_t dlfs_bfree; /* 36: number of free disk blocks */
u_int32_t dlfs_nfiles; /* 40: number of allocated inodes */
int32_t dlfs_avail; /* 44: blocks available for writing */
int32_t dlfs_uinodes; /* 48: inodes in cache not yet on disk */
int32_t dlfs_idaddr; /* 52: inode file disk address */
u_int32_t dlfs_ifile; /* 56: inode file inode number */
int32_t dlfs_lastseg; /* 60: address of last segment written */
int32_t dlfs_nextseg; /* 64: address of next segment to write */
int32_t dlfs_curseg; /* 68: current segment being written */
int32_t dlfs_offset; /* 72: offset in curseg for next partial */
int32_t dlfs_lastpseg; /* 76: address of last partial written */
u_int32_t dlfs_inopf; /* 80: v1: time stamp; v2: inodes per frag */
#define dlfs_otstamp dlfs_inopf
/* These are configuration parameters. */
u_int32_t dlfs_minfree; /* 84: minimum percentage of free blocks */
/* These fields can be computed from the others. */
u_int64_t dlfs_maxfilesize; /* 88: maximum representable file size */
u_int32_t dlfs_fsbpseg; /* 96: fsb per segment */
u_int32_t dlfs_inopb; /* 100: inodes per block */
u_int32_t dlfs_ifpb; /* 104: IFILE entries per block */
u_int32_t dlfs_sepb; /* 108: SEGUSE entries per block */
u_int32_t dlfs_nindir; /* 112: indirect pointers per block */
u_int32_t dlfs_nseg; /* 116: number of segments */
u_int32_t dlfs_nspf; /* 120: number of sectors per fragment */
u_int32_t dlfs_cleansz; /* 124: cleaner info size in blocks */
u_int32_t dlfs_segtabsz; /* 128: segment table size in blocks */
u_int32_t dlfs_segmask; /* 132: calculate offset within a segment */
u_int32_t dlfs_segshift; /* 136: fast mult/div for segments */
u_int32_t dlfs_bshift; /* 140: calc block number from file offset */
u_int32_t dlfs_ffshift; /* 144: fast mult/div for frag from file */
u_int32_t dlfs_fbshift; /* 148: fast mult/div for frag from block */
u_int64_t dlfs_bmask; /* 152: calc block offset from file offset */
u_int64_t dlfs_ffmask; /* 160: calc frag offset from file offset */
u_int64_t dlfs_fbmask; /* 168: calc frag offset from block offset */
u_int32_t dlfs_blktodb; /* 176: blktodb and dbtoblk shift constant */
u_int32_t dlfs_sushift; /* 180: fast mult/div for segusage table */
int32_t dlfs_maxsymlinklen; /* 184: max length of an internal symlink */
#define LFS_MIN_SBINTERVAL 5 /* minimum superblock segment spacing */
#define LFS_MAXNUMSB 10 /* 188: superblock disk offsets */
int32_t dlfs_sboffs[LFS_MAXNUMSB];
u_int32_t dlfs_nclean; /* 228: Number of clean segments */
u_char dlfs_fsmnt[MNAMELEN]; /* 232: name mounted on */
#define LFS_PF_CLEAN 0x1
u_int16_t dlfs_pflags; /* 322: file system persistent flags */
int32_t dlfs_dmeta; /* 324: total number of dirty summaries */
u_int32_t dlfs_minfreeseg; /* 328: segments not counted in bfree */
u_int32_t dlfs_sumsize; /* 332: size of summary blocks */
u_int64_t dlfs_serial; /* 336: serial number */
u_int32_t dlfs_ibsize; /* 344: size of inode blocks */
int32_t dlfs_start; /* 348: start of segment 0 */
u_int64_t dlfs_tstamp; /* 352: time stamp */
#define LFS_44INODEFMT 0
#define LFS_MAXINODEFMT 0
u_int32_t dlfs_inodefmt; /* 360: inode format version */
u_int32_t dlfs_interleave; /* 364: segment interleave */
u_int32_t dlfs_ident; /* 368: per-fs identifier */
u_int32_t dlfs_fsbtodb; /* 372: fsbtodb abd dbtodsb shift constant */
u_int32_t dlfs_resvseg; /* 376: segments reserved for the cleaner */
int8_t dlfs_pad[128]; /* 380: round to 512 bytes */
/* Checksum -- last valid disk field. */
u_int32_t dlfs_cksum; /* 508: checksum for superblock checking */
};
/* Type used for the inode bitmap */
typedef u_int32_t lfs_bm_t;
/*
* Linked list of segments whose byte count needs updating following a
* file truncation.
*/
struct segdelta {
long segnum;
size_t num;
LIST_ENTRY(segdelta) list;
};
/*
* In-memory super block.
*/
struct lfs {
struct dlfs lfs_dlfs; /* on-disk parameters */
#define lfs_magic lfs_dlfs.dlfs_magic
#define lfs_version lfs_dlfs.dlfs_version
#define lfs_size lfs_dlfs.dlfs_size
#define lfs_ssize lfs_dlfs.dlfs_ssize
#define lfs_dsize lfs_dlfs.dlfs_dsize
#define lfs_bsize lfs_dlfs.dlfs_bsize
#define lfs_fsize lfs_dlfs.dlfs_fsize
#define lfs_frag lfs_dlfs.dlfs_frag
#define lfs_freehd lfs_dlfs.dlfs_freehd
#define lfs_bfree lfs_dlfs.dlfs_bfree
#define lfs_nfiles lfs_dlfs.dlfs_nfiles
#define lfs_avail lfs_dlfs.dlfs_avail
#define lfs_uinodes lfs_dlfs.dlfs_uinodes
#define lfs_idaddr lfs_dlfs.dlfs_idaddr
#define lfs_ifile lfs_dlfs.dlfs_ifile
#define lfs_lastseg lfs_dlfs.dlfs_lastseg
#define lfs_nextseg lfs_dlfs.dlfs_nextseg
#define lfs_curseg lfs_dlfs.dlfs_curseg
#define lfs_offset lfs_dlfs.dlfs_offset
#define lfs_lastpseg lfs_dlfs.dlfs_lastpseg
#define lfs_otstamp lfs_dlfs.dlfs_inopf
#define lfs_inopf lfs_dlfs.dlfs_inopf
#define lfs_minfree lfs_dlfs.dlfs_minfree
#define lfs_maxfilesize lfs_dlfs.dlfs_maxfilesize
#define lfs_fsbpseg lfs_dlfs.dlfs_fsbpseg
#define lfs_inopb lfs_dlfs.dlfs_inopb
#define lfs_ifpb lfs_dlfs.dlfs_ifpb
#define lfs_sepb lfs_dlfs.dlfs_sepb
#define lfs_nindir lfs_dlfs.dlfs_nindir
#define lfs_nseg lfs_dlfs.dlfs_nseg
#define lfs_nspf lfs_dlfs.dlfs_nspf
#define lfs_cleansz lfs_dlfs.dlfs_cleansz
#define lfs_segtabsz lfs_dlfs.dlfs_segtabsz
#define lfs_segmask lfs_dlfs.dlfs_segmask
#define lfs_segshift lfs_dlfs.dlfs_segshift
#define lfs_bmask lfs_dlfs.dlfs_bmask
#define lfs_bshift lfs_dlfs.dlfs_bshift
#define lfs_ffmask lfs_dlfs.dlfs_ffmask
#define lfs_ffshift lfs_dlfs.dlfs_ffshift
#define lfs_fbmask lfs_dlfs.dlfs_fbmask
#define lfs_fbshift lfs_dlfs.dlfs_fbshift
#define lfs_blktodb lfs_dlfs.dlfs_blktodb
#define lfs_fsbtodb lfs_dlfs.dlfs_fsbtodb
#define lfs_sushift lfs_dlfs.dlfs_sushift
#define lfs_maxsymlinklen lfs_dlfs.dlfs_maxsymlinklen
#define lfs_sboffs lfs_dlfs.dlfs_sboffs
#define lfs_cksum lfs_dlfs.dlfs_cksum
#define lfs_pflags lfs_dlfs.dlfs_pflags
#define lfs_fsmnt lfs_dlfs.dlfs_fsmnt
#define lfs_nclean lfs_dlfs.dlfs_nclean
#define lfs_dmeta lfs_dlfs.dlfs_dmeta
#define lfs_minfreeseg lfs_dlfs.dlfs_minfreeseg
#define lfs_sumsize lfs_dlfs.dlfs_sumsize
#define lfs_serial lfs_dlfs.dlfs_serial
#define lfs_ibsize lfs_dlfs.dlfs_ibsize
#define lfs_start lfs_dlfs.dlfs_start
#define lfs_tstamp lfs_dlfs.dlfs_tstamp
#define lfs_inodefmt lfs_dlfs.dlfs_inodefmt
#define lfs_interleave lfs_dlfs.dlfs_interleave
#define lfs_ident lfs_dlfs.dlfs_ident
#define lfs_resvseg lfs_dlfs.dlfs_resvseg
/* These fields are set at mount time and are meaningless on disk. */
struct segment *lfs_sp; /* current segment being written */
struct vnode *lfs_ivnode; /* vnode for the ifile */
u_int32_t lfs_seglock; /* single-thread the segment writer */
pid_t lfs_lockpid; /* pid of lock holder */
lwpid_t lfs_locklwp; /* lwp of lock holder */
u_int32_t lfs_iocount; /* number of ios pending */
u_int32_t lfs_writer; /* don't allow any dirops to start */
u_int32_t lfs_dirops; /* count of active directory ops */
u_int32_t lfs_dirvcount; /* count of VDIROP nodes in this fs */
u_int32_t lfs_doifile; /* Write ifile blocks on next write */
u_int32_t lfs_nactive; /* Number of segments since last ckp */
int8_t lfs_fmod; /* super block modified flag */
int8_t lfs_ronly; /* mounted read-only flag */
#define LFS_NOTYET 0x01
#define LFS_IFDIRTY 0x02
#define LFS_WARNED 0x04
#define LFS_UNDIROP 0x08
int8_t lfs_flags; /* currently unused flag */
u_int16_t lfs_activesb; /* toggle between superblocks */
daddr_t lfs_sbactive; /* disk address of current sb write */
struct vnode *lfs_flushvp; /* vnode being flushed */
int lfs_flushvp_fakevref; /* fake vref count for flushvp */
struct vnode *lfs_unlockvp; /* being inactivated in lfs_segunlock */
u_int32_t lfs_diropwait; /* # procs waiting on dirop flush */
size_t lfs_devbsize; /* Device block size */
size_t lfs_devbshift; /* Device block shift */
krwlock_t lfs_fraglock;
struct lock lfs_iflock; /* Ifile lock */
struct lock lfs_stoplock; /* Wrap lock */
pid_t lfs_rfpid; /* Process ID of roll-forward agent */
int lfs_nadirop; /* number of active dirop nodes */
long lfs_ravail; /* blocks pre-reserved for writing */
long lfs_favail; /* blocks pre-reserved for writing */
res_t *lfs_resblk; /* Reserved memory for pageout */
TAILQ_HEAD(, inode) lfs_dchainhd; /* dirop vnodes */
TAILQ_HEAD(, inode) lfs_pchainhd; /* paging vnodes */
#define LFS_RESHASH_WIDTH 17
LIST_HEAD(, lfs_res_blk) lfs_reshash[LFS_RESHASH_WIDTH];
int lfs_pdflush; /* pagedaemon wants us to flush */
u_int32_t **lfs_suflags; /* Segment use flags */
#ifdef _KERNEL
struct pool lfs_clpool; /* Pool for struct lfs_cluster */
struct pool lfs_bpppool; /* Pool for bpp */
struct pool lfs_segpool; /* Pool for struct segment */
#endif /* _KERNEL */
#define LFS_MAX_CLEANIND 64
int32_t lfs_cleanint[LFS_MAX_CLEANIND]; /* Active cleaning intervals */
int lfs_cleanind; /* Index into intervals */
struct simplelock lfs_interlock; /* lock for lfs_seglock */
int lfs_sleepers; /* # procs sleeping this fs */
int lfs_pages; /* dirty pages blaming this fs */
lfs_bm_t *lfs_ino_bitmap; /* Inuse inodes bitmap */
int lfs_nowrap; /* Suspend log wrap */
int lfs_wrappass; /* Allow first log wrap requester to pass */
int lfs_wrapstatus; /* Wrap status */
LIST_HEAD(, segdelta) lfs_segdhd; /* List of pending trunc accounting events */
};
/* NINDIR is the number of indirects in a file system block. */
#define NINDIR(fs) ((fs)->lfs_nindir)
/* INOPB is the number of inodes in a secondary storage block. */
#define INOPB(fs) ((fs)->lfs_inopb)
/* INOPF is the number of inodes in a fragment. */
#define INOPF(fs) ((fs)->lfs_inopf)
#define blksize(fs, ip, lbn) \
(((lbn) >= NDADDR || (ip)->i_ffs1_size >= ((lbn) + 1) << (fs)->lfs_bshift) \
? (fs)->lfs_bsize \
: (fragroundup(fs, blkoff(fs, (ip)->i_ffs1_size))))
#define blkoff(fs, loc) ((int)((loc) & (fs)->lfs_bmask))
#define fragoff(fs, loc) /* calculates (loc % fs->lfs_fsize) */ \
((int)((loc) & (fs)->lfs_ffmask))
#define fsbtodb(fs, b) ((b) << (fs)->lfs_fsbtodb)
#define dbtofsb(fs, b) ((b) >> (fs)->lfs_fsbtodb)
#define fragstodb(fs, b) ((b) << ((fs)->lfs_blktodb - (fs)->lfs_fbshift))
#define dbtofrags(fs, b) ((b) >> ((fs)->lfs_blktodb - (fs)->lfs_fbshift))
#define lblkno(fs, loc) ((loc) >> (fs)->lfs_bshift)
#define lblktosize(fs, blk) ((blk) << (fs)->lfs_bshift)
/* Same as above, but named like dbtob(), btodb() */
#define fsbtob(fs, b) ((b) << ((fs)->lfs_bshift - \
(fs)->lfs_blktodb + (fs)->lfs_fsbtodb))
#define btofsb(fs, b) ((b) >> ((fs)->lfs_bshift - \
(fs)->lfs_blktodb + (fs)->lfs_fsbtodb))
#define fsbtofrags(fs, b) ((b) >> ((fs)->lfs_blktodb - (fs)->lfs_fbshift - \
(fs)->lfs_fsbtodb))
#define fragstofsb(fs, b) ((b) << ((fs)->lfs_blktodb - (fs)->lfs_fbshift - \
(fs)->lfs_fsbtodb))
#define btofrags(fs, b) ((b) >> (fs)->lfs_ffshift)
#define numfrags(fs, loc) /* calculates (loc / fs->lfs_fsize) */ \
((loc) >> (fs)->lfs_ffshift)
#define blkroundup(fs, size) /* calculates roundup(size, fs->lfs_bsize) */ \
((off_t)(((size) + (fs)->lfs_bmask) & (~(fs)->lfs_bmask)))
#define fragroundup(fs, size) /* calculates roundup(size, fs->lfs_fsize) */ \
((off_t)(((size) + (fs)->lfs_ffmask) & (~(fs)->lfs_ffmask)))
#define fragstoblks(fs, frags) /* calculates (frags / fs->lfs_frag) */ \
((frags) >> (fs)->lfs_fbshift)
#define blkstofrags(fs, blks) /* calculates (blks * fs->lfs_frag) */ \
((blks) << (fs)->lfs_fbshift)
#define fragnum(fs, fsb) /* calculates (fsb % fs->lfs_frag) */ \
((fsb) & ((fs)->lfs_frag - 1))
#define blknum(fs, fsb) /* calculates rounddown(fsb, fs->lfs_frag) */ \
((fsb) &~ ((fs)->lfs_frag - 1))
#define dblksize(fs, dp, lbn) \
(((lbn) >= NDADDR || (dp)->di_size >= ((lbn) + 1) << (fs)->lfs_bshift)\
? (fs)->lfs_bsize \
: (fragroundup(fs, blkoff(fs, (dp)->di_size))))
#define segsize(fs) ((fs)->lfs_version == 1 ? \
lblktosize((fs), (fs)->lfs_ssize) : \
(fs)->lfs_ssize)
#define segtod(fs, seg) (((fs)->lfs_version == 1 ? \
(fs)->lfs_ssize << (fs)->lfs_blktodb : \
btofsb((fs), (fs)->lfs_ssize)) * (seg))
#define dtosn(fs, daddr) /* block address to segment number */ \
((uint32_t)(((daddr) - (fs)->lfs_start) / segtod((fs), 1)))
#define sntod(fs, sn) /* segment number to disk address */ \
((daddr_t)(segtod((fs), (sn)) + (fs)->lfs_start))
/*
* Structures used by lfs_bmapv and lfs_markv to communicate information
* about inodes and data blocks.
*/
typedef struct block_info {
u_int32_t bi_inode; /* inode # */
int32_t bi_lbn; /* logical block w/in file */
int32_t bi_daddr; /* disk address of block */
u_int64_t bi_segcreate; /* origin segment create time */
int bi_version; /* file version number */
void *bi_bp; /* data buffer */
int bi_size; /* size of the block (if fragment) */
} BLOCK_INFO;
/* Compatibility for 1.5 binaries */
typedef struct block_info_15 {
u_int32_t bi_inode; /* inode # */
int32_t bi_lbn; /* logical block w/in file */
int32_t bi_daddr; /* disk address of block */
u_int32_t bi_segcreate; /* origin segment create time */
int bi_version; /* file version number */
void *bi_bp; /* data buffer */
int bi_size; /* size of the block (if fragment) */
} BLOCK_INFO_15;
/* In-memory description of a segment about to be written. */
struct segment {
struct lfs *fs; /* file system pointer */
struct buf **bpp; /* pointer to buffer array */
struct buf **cbpp; /* pointer to next available bp */
struct buf **start_bpp; /* pointer to first bp in this set */
struct buf *ibp; /* buffer pointer to inode page */
struct ufs1_dinode *idp; /* pointer to ifile dinode */
struct finfo *fip; /* current fileinfo pointer */
struct vnode *vp; /* vnode being gathered */
void *segsum; /* segment summary info */
u_int32_t ninodes; /* number of inodes in this segment */
int32_t seg_bytes_left; /* bytes left in segment */
int32_t sum_bytes_left; /* bytes left in summary block */
u_int32_t seg_number; /* number of this segment */
int32_t *start_lbp; /* beginning lbn for this set */
#define SEGM_CKP 0x01 /* doing a checkpoint */
#define SEGM_CLEAN 0x02 /* cleaner call; don't sort */
#define SEGM_SYNC 0x04 /* wait for segment */
#define SEGM_PROT 0x08 /* don't inactivate at segunlock */
#define SEGM_PAGEDAEMON 0x10 /* pagedaemon called us */
#define SEGM_WRITERD 0x20 /* LFS writed called us */
#define SEGM_FORCE_CKP 0x40 /* Force checkpoint right away */
u_int16_t seg_flags; /* run-time flags for this segment */
u_int32_t seg_iocount; /* number of ios pending */
int ndupino; /* number of duplicate inodes */
};
#ifdef _KERNEL
struct lfs_cluster {
size_t bufsize; /* Size of kept data */
struct buf **bpp; /* Array of kept buffers */
int bufcount; /* Number of kept buffers */
#define LFS_CL_MALLOC 0x00000001
#define LFS_CL_SHIFT 0x00000002
#define LFS_CL_SYNC 0x00000004
u_int32_t flags; /* Flags */
struct lfs *fs; /* LFS that this belongs to */
struct segment *seg; /* Segment structure, for LFS_CL_SYNC */
};
/*
* Splay tree containing block numbers allocated through lfs_balloc.
*/
struct lbnentry {
SPLAY_ENTRY(lbnentry) entry;
daddr_t lbn;
};
#endif /* _KERNEL */
/*
* LFS inode extensions.
*/
struct lfs_inode_ext {
off_t lfs_osize; /* size of file on disk */
u_int32_t lfs_effnblocks; /* number of blocks when i/o completes */
size_t lfs_fragsize[NDADDR]; /* size of on-disk direct blocks */
TAILQ_ENTRY(inode) lfs_dchain; /* Dirop chain. */
TAILQ_ENTRY(inode) lfs_pchain; /* Paging chain. */
#define LFSI_NO_GOP_WRITE 0x01
#define LFSI_DELETED 0x02
#define LFSI_WRAPBLOCK 0x04
#define LFSI_WRAPWAIT 0x08
u_int32_t lfs_iflags; /* Inode flags */
daddr_t lfs_hiblk; /* Highest lbn held by inode */
#ifdef _KERNEL
SPLAY_HEAD(lfs_splay, lbnentry) lfs_lbtree; /* Tree of balloc'd lbns */
int lfs_nbtree; /* Size of tree */
LIST_HEAD(, segdelta) lfs_segdhd;
#endif
int16_t lfs_odnlink; /* on-disk nlink count for cleaner */
};
#define i_lfs_osize inode_ext.lfs->lfs_osize
#define i_lfs_effnblks inode_ext.lfs->lfs_effnblocks
#define i_lfs_fragsize inode_ext.lfs->lfs_fragsize
#define i_lfs_dchain inode_ext.lfs->lfs_dchain
#define i_lfs_pchain inode_ext.lfs->lfs_pchain
#define i_lfs_iflags inode_ext.lfs->lfs_iflags
#define i_lfs_hiblk inode_ext.lfs->lfs_hiblk
#define i_lfs_lbtree inode_ext.lfs->lfs_lbtree
#define i_lfs_nbtree inode_ext.lfs->lfs_nbtree
#define i_lfs_segdhd inode_ext.lfs->lfs_segdhd
#define i_lfs_odnlink inode_ext.lfs->lfs_odnlink
/*
* Macros for determining free space on the disk, with the variable metadata
* of segment summaries and inode blocks taken into account.
*/
/* Estimate number of clean blocks not available for writing */
#define LFS_EST_CMETA(F) (int32_t)((((F)->lfs_dmeta * \
(int64_t)(F)->lfs_nclean) / \
((F)->lfs_nseg - (F)->lfs_nclean)))
/* Estimate total size of the disk not including metadata */
#define LFS_EST_NONMETA(F) ((F)->lfs_dsize - (F)->lfs_dmeta - LFS_EST_CMETA(F))
/* Estimate number of blocks actually available for writing */
#define LFS_EST_BFREE(F) ((F)->lfs_bfree > LFS_EST_CMETA(F) ? \
(F)->lfs_bfree - LFS_EST_CMETA(F) : 0)
/* Amount of non-meta space not available to mortal man */
#define LFS_EST_RSVD(F) (int32_t)((LFS_EST_NONMETA(F) * \
(u_int64_t)(F)->lfs_minfree) / \
100)
/* Can credential C write BB blocks */
#define ISSPACE(F, BB, C) \
((((C) == NOCRED || kauth_cred_geteuid(C) == 0) && \
LFS_EST_BFREE(F) >= (BB)) || \
(kauth_cred_geteuid(C) != 0 && IS_FREESPACE(F, BB)))
/* Can an ordinary user write BB blocks */
#define IS_FREESPACE(F, BB) \
(LFS_EST_BFREE(F) >= (BB) + LFS_EST_RSVD(F))
/*
* The minimum number of blocks to create a new inode. This is:
* directory direct block (1) + NIADDR indirect blocks + inode block (1) +
* ifile direct block (1) + NIADDR indirect blocks = 3 + 2 * NIADDR blocks.
*/
#define LFS_NRESERVE(F) (btofsb((F), (2 * NIADDR + 3) << (F)->lfs_bshift))
/* Statistics Counters */
struct lfs_stats { /* Must match sysctl list in lfs_vfsops.h ! */
u_int segsused;
u_int psegwrites;
u_int psyncwrites;
u_int pcleanwrites;
u_int blocktot;
u_int cleanblocks;
u_int ncheckpoints;
u_int nwrites;
u_int nsync_writes;
u_int wait_exceeded;
u_int write_exceeded;
u_int flush_invoked;
u_int vflush_invoked;
u_int clean_inlocked;
u_int clean_vnlocked;
u_int segs_reclaimed;
};
#ifdef _KERNEL
extern struct lfs_stats lfs_stats;
#endif
/* Fcntls to take the place of the lfs syscalls */
struct lfs_fcntl_markv {
BLOCK_INFO *blkiov; /* blocks to relocate */
int blkcnt; /* number of blocks */
};
#define LFCNSEGWAITALL _FCNR_FSPRIV('L', 0, struct timeval)
#define LFCNSEGWAIT _FCNR_FSPRIV('L', 1, struct timeval)
#define LFCNBMAPV _FCNRW_FSPRIV('L', 2, struct lfs_fcntl_markv)
#define LFCNMARKV _FCNRW_FSPRIV('L', 3, struct lfs_fcntl_markv)
#define LFCNRECLAIM _FCNO_FSPRIV('L', 4)
struct lfs_fhandle {
char space[28]; /* FHANDLE_SIZE_COMPAT (but used from userland too) */
};
#define LFCNREWIND _FCNR_FSPRIV('L', 6, int)
#define LFCNINVAL _FCNR_FSPRIV('L', 7, int)
#define LFCNRESIZE _FCNR_FSPRIV('L', 8, int)
#define LFCNWRAPSTOP _FCNR_FSPRIV('L', 9, int)
#define LFCNWRAPGO _FCNR_FSPRIV('L', 10, int)
#define LFCNIFILEFH _FCNW_FSPRIV('L', 11, struct lfs_fhandle)
#define LFCNWRAPPASS _FCNR_FSPRIV('L', 12, int)
# define LFS_WRAP_GOING 0x0
# define LFS_WRAP_WAITING 0x1
#define LFCNWRAPSTATUS _FCNW_FSPRIV('L', 13, int)
/* Compat */
#define LFCNSEGWAITALL_COMPAT _FCNW_FSPRIV('L', 0, struct timeval)
#define LFCNSEGWAIT_COMPAT _FCNW_FSPRIV('L', 1, struct timeval)
#define LFCNIFILEFH_COMPAT _FCNW_FSPRIV('L', 5, struct lfs_fhandle)
#define LFCNIFILEFH_COMPAT2 _FCN_FSPRIV(F_FSOUT, 'L', 11, 32)
#define LFCNWRAPSTOP_COMPAT _FCNO_FSPRIV('L', 9)
#define LFCNWRAPGO_COMPAT _FCNO_FSPRIV('L', 10)
#ifdef _KERNEL
/* XXX MP */
#define LFS_SEGLOCK_HELD(fs) \
((fs)->lfs_seglock != 0 && \
(fs)->lfs_lockpid == curproc->p_pid && \
(fs)->lfs_locklwp == curlwp->l_lid)
#endif /* _KERNEL */
/* Debug segment lock */
#ifdef notyet
# define ASSERT_SEGLOCK(fs) KASSERT(LFS_SEGLOCK_HELD(fs))
# define ASSERT_NO_SEGLOCK(fs) KASSERT(!LFS_SEGLOCK_HELD(fs))
# define ASSERT_DUNNO_SEGLOCK(fs)
# define ASSERT_MAYBE_SEGLOCK(fs)
#else /* !notyet */
# define ASSERT_DUNNO_SEGLOCK(fs) \
DLOG((DLOG_SEG, "lfs func %s seglock wrong (%d)\n", __func__, \
LFS_SEGLOCK_HELD(fs)))
# define ASSERT_SEGLOCK(fs) do { \
if (!LFS_SEGLOCK_HELD(fs)) { \
DLOG((DLOG_SEG, "lfs func %s seglock wrong (0)\n", __func__)); \
} \
} while(0)
# define ASSERT_NO_SEGLOCK(fs) do { \
if (LFS_SEGLOCK_HELD(fs)) { \
DLOG((DLOG_SEG, "lfs func %s seglock wrong (1)\n", __func__)); \
} \
} while(0)
# define ASSERT_MAYBE_SEGLOCK(x)
#endif /* !notyet */
__BEGIN_DECLS
void lfs_itimes(struct inode *, const struct timespec *,
const struct timespec *, const struct timespec *);
__END_DECLS
#endif /* !_UFS_LFS_LFS_H_ */
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