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NetBSD/sys/ufs/lfs/lfs.h
perseant 1c57171fe3 Change LFCNWRAP{STOP,GO} to make them more suitable for snapshotting; in 
particular, the caller can now choose whether to wait for the condition
to be met, and if the caller of LFCNWRAPSTOP dies or otherwise closes
the descriptor, the filesystem is started again.  Updated the ckckp
regression test to use the new semantics.

dump_lfs(8) now uses the fcntls to implement LFS-style snapshotting through
the -X flag, addressing PR#33457 albeit not using fss(4).  Fixed a couple
other problems with dump_lfs that manifested themselves during testing.
2006-06-24 05:28:54 +00:00

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/* $NetBSD: lfs.h,v 1.108 2006/06/24 05:28:54 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_
/*
* 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_BUFS ((nbuf >> 2) - 10)
#define LFS_WAIT_BUFS ((nbuf >> 1) - (nbuf >> 3) - 10)
#define LFS_INVERSE_MAX_BUFS(n) (((n) + 10) << 2)
#define LFS_MAX_BYTES ((bufmem_lowater >> 2) - 10 * PAGE_SIZE)
#define LFS_INVERSE_MAX_BYTES(n) (((n) + 10 * PAGE_SIZE) << 2)
#define LFS_WAIT_BYTES ((bufmem_lowater >> 1) - (bufmem_lowater >> 3) - 10 * 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 \
(((uvmexp.active + uvmexp.inactive + uvmexp.free) * uvmexp.filemin) >> 8)
#define LFS_WAIT_PAGES \
(((uvmexp.active + uvmexp.inactive + uvmexp.free) * uvmexp.filemax) >> 8)
#define LFS_BUFWAIT 2 /* How long to wait if over *_WAIT_* */
/* 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_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 */
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 */
} 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*/
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 */
struct lock lfs_fraglock;
struct lock lfs_iflock; /* Ifile 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 */
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
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
};
#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
/*
* 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)
#define LFCNIFILEFH _FCNW_FSPRIV('L', 5, struct fhandle)
#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)
/* Compat */
#define LFCNSEGWAITALL_COMPAT _FCNW_FSPRIV('L', 0, struct timeval)
#define LFCNSEGWAIT_COMPAT _FCNW_FSPRIV('L', 1, struct timeval)
#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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