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Merged enough of lfs from Lite2 for mkdep of LINT to work again.

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This commit is contained in:
Bruce Evans 1997-03-22 09:33:55 +00:00
parent 774fce94c0
commit 20cb3c714b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=24103
2 changed files with 216 additions and 177 deletions
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284
sys/ufs/lfs/lfs.h
View File

@ -30,8 +30,8 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)lfs.h 8.3 (Berkeley) 9/23/93
* $Id$
* @(#)lfs.h 8.9 (Berkeley) 5/8/95
* $Id: lfs.h,v 1.9 1997/02/22 09:47:15 peter Exp $
*/
#ifndef _UFS_LFS_LFS_H_
@ -59,14 +59,15 @@
/* On-disk and in-memory checkpoint segment usage structure. */
typedef struct segusage SEGUSE;
struct segusage {
u_long su_nbytes; /* number of live bytes */
u_long su_lastmod; /* SEGUSE last modified timestamp */
u_short su_nsums; /* number of summaries in segment */
u_short su_ninos; /* number of inode blocks in seg */
#define SEGUSE_ACTIVE 0x1 /* segment is currently being written */
#define SEGUSE_DIRTY 0x2 /* segment has data in it */
#define SEGUSE_SUPERBLOCK 0x4 /* segment contains a superblock */
u_long su_flags;
u_int32_t su_nbytes; /* number of live bytes */
u_int32_t su_lastmod; /* SEGUSE last modified timestamp */
u_int16_t su_nsums; /* number of summaries in segment */
u_int16_t su_ninos; /* number of inode blocks in seg */
#define SEGUSE_ACTIVE 0x01 /* segment is currently being written */
#define SEGUSE_DIRTY 0x02 /* segment has data in it */
#define SEGUSE_SUPERBLOCK 0x04 /* segment contains a superblock */
u_int32_t su_flags;
};
#define SEGUPB(fs) (1 << (fs)->lfs_sushift)
@ -76,100 +77,102 @@ struct segusage {
/* On-disk file information. One per file with data blocks in the segment. */
typedef struct finfo FINFO;
struct finfo {
u_long fi_nblocks; /* number of blocks */
u_long fi_version; /* version number */
u_long fi_ino; /* inode number */
daddr_t fi_blocks[1]; /* array of logical block numbers */
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 */
ufs_daddr_t fi_blocks[1]; /* array of logical block numbers */
};
/* On-disk and in-memory super block. */
struct lfs {
#define LFS_MAGIC 0x070162
u_long lfs_magic; /* magic number */
u_int32_t lfs_magic; /* magic number */
#define LFS_VERSION 1
u_long lfs_version; /* version number */
u_int32_t lfs_version; /* version number */
u_long lfs_size; /* number of blocks in fs */
u_long lfs_ssize; /* number of blocks per segment */
u_long lfs_dsize; /* number of disk blocks in fs */
u_long lfs_bsize; /* file system block size */
u_long lfs_fsize; /* size of frag blocks in fs */
u_long lfs_frag; /* number of frags in a block in fs */
u_int32_t lfs_size; /* number of blocks in fs */
u_int32_t lfs_ssize; /* number of blocks per segment */
u_int32_t lfs_dsize; /* number of disk blocks in fs */
u_int32_t lfs_bsize; /* file system block size */
u_int32_t lfs_fsize; /* size of frag blocks in fs */
u_int32_t lfs_frag; /* number of frags in a block in fs */
/* Checkpoint region. */
ino_t lfs_free; /* start of the free list */
u_long lfs_bfree; /* number of free disk blocks */
u_long lfs_nfiles; /* number of allocated inodes */
long lfs_avail; /* blocks available for writing */
u_long lfs_uinodes; /* inodes in cache not yet on disk */
daddr_t lfs_idaddr; /* inode file disk address */
ino_t lfs_ifile; /* inode file inode number */
daddr_t lfs_lastseg; /* address of last segment written */
daddr_t lfs_nextseg; /* address of next segment to write */
daddr_t lfs_curseg; /* current segment being written */
daddr_t lfs_offset; /* offset in curseg for next partial */
daddr_t lfs_lastpseg; /* address of last partial written */
u_long lfs_tstamp; /* time stamp */
long lfs_maxsymlinklen; /* max length of an internal symlink */
ino_t lfs_free; /* start of the free list */
u_int32_t lfs_bfree; /* number of free disk blocks */
u_int32_t lfs_nfiles; /* number of allocated inodes */
int32_t lfs_avail; /* blocks available for writing */
u_int32_t lfs_uinodes; /* inodes in cache not yet on disk */
ufs_daddr_t lfs_idaddr; /* inode file disk address */
ino_t lfs_ifile; /* inode file inode number */
ufs_daddr_t lfs_lastseg; /* address of last segment written */
ufs_daddr_t lfs_nextseg; /* address of next segment to write */
ufs_daddr_t lfs_curseg; /* current segment being written */
ufs_daddr_t lfs_offset; /* offset in curseg for next partial */
ufs_daddr_t lfs_lastpseg; /* address of last partial written */
u_int32_t lfs_tstamp; /* time stamp */
/* These are configuration parameters. */
u_long lfs_minfree; /* minimum percentage of free blocks */
u_int32_t lfs_minfree; /* minimum percentage of free blocks */
/* These fields can be computed from the others. */
u_quad_t lfs_maxfilesize; /* maximum representable file size */
u_long lfs_dbpseg; /* disk blocks per segment */
u_long lfs_inopb; /* inodes per block */
u_long lfs_ifpb; /* IFILE entries per block */
u_long lfs_sepb; /* SEGUSE entries per block */
u_long lfs_nindir; /* indirect pointers per block */
u_long lfs_nseg; /* number of segments */
u_long lfs_nspf; /* number of sectors per fragment */
u_long lfs_cleansz; /* cleaner info size in blocks */
u_long lfs_segtabsz; /* segment table size in blocks */
u_int64_t lfs_maxfilesize; /* maximum representable file size */
u_int32_t lfs_dbpseg; /* disk blocks per segment */
u_int32_t lfs_inopb; /* inodes per block */
u_int32_t lfs_ifpb; /* IFILE entries per block */
u_int32_t lfs_sepb; /* SEGUSE entries per block */
u_int32_t lfs_nindir; /* indirect pointers per block */
u_int32_t lfs_nseg; /* number of segments */
u_int32_t lfs_nspf; /* number of sectors per fragment */
u_int32_t lfs_cleansz; /* cleaner info size in blocks */
u_int32_t lfs_segtabsz; /* segment table size in blocks */
u_long lfs_segmask; /* calculate offset within a segment */
u_long lfs_segshift; /* fast mult/div for segments */
u_long lfs_bmask; /* calc block offset from file offset */
u_long lfs_bshift; /* calc block number from file offset */
u_long lfs_ffmask; /* calc frag offset from file offset */
u_long lfs_ffshift; /* fast mult/div for frag from file */
u_long lfs_fbmask; /* calc frag offset from block offset */
u_long lfs_fbshift; /* fast mult/div for frag from block */
u_long lfs_fsbtodb; /* fsbtodb and dbtofsb shift constant */
u_long lfs_sushift; /* fast mult/div for segusage table */
u_int32_t lfs_segmask; /* calculate offset within a segment */
u_int32_t lfs_segshift; /* fast mult/div for segments */
u_int64_t lfs_bmask; /* calc block offset from file offset */
u_int32_t lfs_bshift; /* calc block number from file offset */
u_int64_t lfs_ffmask; /* calc frag offset from file offset */
u_int32_t lfs_ffshift; /* fast mult/div for frag from file */
u_int64_t lfs_fbmask; /* calc frag offset from block offset */
u_int32_t lfs_fbshift; /* fast mult/div for frag from block */
u_int32_t lfs_fsbtodb; /* fsbtodb and dbtofsb shift constant */
u_int32_t lfs_sushift; /* fast mult/div for segusage table */
int32_t lfs_maxsymlinklen; /* max length of an internal symlink */
#define LFS_MIN_SBINTERVAL 5 /* minimum superblock segment spacing */
#define LFS_MAXNUMSB 10 /* superblock disk offsets */
daddr_t lfs_sboffs[LFS_MAXNUMSB];
ufs_daddr_t lfs_sboffs[LFS_MAXNUMSB];
/* Checksum -- last valid disk field. */
u_int32_t lfs_cksum; /* checksum for superblock checking */
/* 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_long lfs_seglock; /* single-thread the segment writer */
pid_t lfs_lockpid; /* pid of lock holder */
u_long lfs_iocount; /* number of ios pending */
u_long lfs_writer; /* don't allow any dirops to start */
u_long lfs_dirops; /* count of active directory ops */
u_long lfs_doifile; /* Write ifile blocks on next write */
u_long lfs_nactive; /* Number of segments since last ckp */
u_char lfs_fmod; /* super block modified flag */
u_char lfs_clean; /* file system is clean flag */
u_char lfs_ronly; /* mounted read-only flag */
u_char lfs_flags; /* currently unused flag */
u_char lfs_fsmnt[MNAMELEN]; /* name mounted on */
u_char pad[3]; /* long-align */
u_char pad2[156]; /* Block align */
struct segment *lfs_sp; /* current segment being written */
struct vnode *lfs_ivnode; /* vnode for the ifile */
u_long lfs_seglock; /* single-thread the segment writer */
pid_t lfs_lockpid; /* pid of lock holder */
u_long lfs_iocount; /* number of ios pending */
u_long lfs_writer; /* don't allow any dirops to start */
u_long lfs_dirops; /* count of active directory ops */
u_long lfs_doifile; /* Write ifile blocks on next write */
u_long lfs_nactive; /* Number of segments since last ckp */
int8_t lfs_fmod; /* super block modified flag */
int8_t lfs_clean; /* file system is clean flag */
int8_t lfs_ronly; /* mounted read-only flag */
int8_t lfs_flags; /* currently unused flag */
u_char lfs_fsmnt[MNAMELEN]; /* name mounted on */
/* Checksum; valid on disk. */
u_long lfs_cksum; /* checksum for superblock checking */
int32_t lfs_pad[40]; /* round to 512 bytes */
};
/*
* Inode 0 is the out-of-band inode number, inode 1 is the inode number for
* the IFILE, the root inode is 2 and the lost+found inode is 3.
* Inode 0: out-of-band inode number
* Inode 1: IFILE inode number
* Inode 2: root inode
* Inode 3: lost+found inode number
*/
/* Fixed inode numbers. */
#define LFS_UNUSED_INUM 0 /* out of band inode number */
#define LFS_IFILE_INUM 1 /* IFILE inode number */
#define LOSTFOUNDINO 3 /* lost+found inode number */
@ -188,10 +191,10 @@ struct lfs {
typedef struct ifile IFILE;
struct ifile {
u_long if_version; /* inode version number */
u_int32_t if_version; /* inode version number */
#define LFS_UNUSED_DADDR 0 /* out-of-band daddr */
daddr_t if_daddr; /* inode disk address */
ino_t if_nextfree; /* next-unallocated inode */
ufs_daddr_t if_daddr; /* inode disk address */
ino_t if_nextfree; /* next-unallocated inode */
};
/*
@ -199,8 +202,8 @@ struct ifile {
* to pass information between the cleaner and the kernel.
*/
typedef struct _cleanerinfo {
u_long clean; /* K: number of clean segments */
u_long dirty; /* K: number of dirty segments */
u_int32_t clean; /* K: number of clean segments */
u_int32_t dirty; /* K: number of dirty segments */
} CLEANERINFO;
#define CLEANSIZE_SU(fs) \
@ -215,16 +218,19 @@ typedef struct _cleanerinfo {
/* On-disk segment summary information */
typedef struct segsum SEGSUM;
struct segsum {
u_long ss_sumsum; /* check sum of summary block */
u_long ss_datasum; /* check sum of data */
daddr_t ss_next; /* next segment */
u_long ss_create; /* creation time stamp */
u_short ss_nfinfo; /* number of file info structures */
u_short ss_ninos; /* number of inodes in summary */
u_int32_t ss_sumsum; /* check sum of summary block */
u_int32_t ss_datasum; /* check sum of data */
u_int32_t ss_magic; /* segment summary magic number */
#define SS_MAGIC 0x061561
ufs_daddr_t ss_next; /* next segment */
u_int32_t ss_create; /* creation time stamp */
u_int16_t ss_nfinfo; /* number of file info structures */
u_int16_t ss_ninos; /* number of inodes in summary */
#define SS_DIROP 0x01 /* segment begins a dirop */
#define SS_CONT 0x02 /* more partials to finish this write*/
u_short ss_flags; /* used for directory operations */
u_short ss_pad; /* extra space */
u_int16_t ss_flags; /* used for directory operations */
u_int16_t ss_pad; /* extra space */
/* FINFO's and inode daddr's... */
};
@ -234,26 +240,48 @@ struct segsum {
/* INOPB is the number of inodes in a secondary storage block. */
#define INOPB(fs) ((fs)->lfs_inopb)
#define blksize(fs) ((fs)->lfs_bsize)
#define blkoff(fs, loc) ((loc) & (fs)->lfs_bmask)
#define blksize(fs, ip, lbn) \
(((lbn) >= NDADDR || (ip)->i_size >= ((lbn) + 1) << (fs)->lfs_bshift) \
? (fs)->lfs_bsize \
: (fragroundup(fs, blkoff(fs, (ip)->i_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_fsbtodb - (fs)->lfs_fbshift)
#define dbtofrags(fs, b) ((b) >> (fs)->lfs_fsbtodb - (fs)->lfs_fbshift)
#define lblkno(fs, loc) ((loc) >> (fs)->lfs_bshift)
#define lblktosize(fs, blk) ((blk) << (fs)->lfs_bshift)
#define numfrags(fs, loc) /* calculates (loc / fs->fs_fsize) */ \
((loc) >> (fs)->lfs_bshift)
#define numfrags(fs, loc) /* calculates (loc / fs->lfs_fsize) */ \
((loc) >> (fs)->lfs_ffshift)
#define blkroundup(fs, size) /* calculates roundup(size, fs->lfs_bsize) */ \
((int)(((size) + (fs)->lfs_bmask) & (~(fs)->lfs_bmask)))
#define fragroundup(fs, size) /* calculates roundup(size, fs->lfs_fsize) */ \
((int)(((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, dip, lbn) \
(((lbn) >= NDADDR || (dip)->di_size >= ((lbn) + 1) << (fs)->lfs_bshift)\
? (fs)->lfs_bsize \
: (fragroundup(fs, blkoff(fs, (dip)->di_size))))
#define datosn(fs, daddr) /* disk address to segment number */ \
(((daddr) - (fs)->lfs_sboffs[0]) / fsbtodb((fs), (fs)->lfs_ssize))
#define sntoda(fs, sn) /* segment number to disk address */ \
((daddr_t)((sn) * ((fs)->lfs_ssize << (fs)->lfs_fsbtodb) + \
((ufs_daddr_t)((sn) * ((fs)->lfs_ssize << (fs)->lfs_fsbtodb) + \
(fs)->lfs_sboffs[0]))
/* Read in the block with the cleaner info from the ifile. */
#define LFS_CLEANERINFO(CP, F, BP) { \
VTOI((F)->lfs_ivnode)->i_flag |= IN_ACCESS; \
if (bread((F)->lfs_ivnode, \
(daddr_t)0, (F)->lfs_bsize, NOCRED, &(BP))) \
(ufs_daddr_t)0, (F)->lfs_bsize, NOCRED, &(BP))) \
panic("lfs: ifile read"); \
(CP) = (CLEANERINFO *)(BP)->b_data; \
}
@ -293,8 +321,8 @@ struct segsum {
* the segment usage table, plus an ifile page.
*/
#define LFS_FITS(fs, db) \
((long)((db + ((fs)->lfs_uinodes + INOPB((fs))) / INOPB((fs)) + \
fsbtodb(fs, 1) + LFS_SUMMARY_SIZE / DEV_BSIZE + \
((int32_t)((db + ((fs)->lfs_uinodes + INOPB((fs))) / \
INOPB((fs)) + fsbtodb(fs, 1) + LFS_SUMMARY_SIZE / DEV_BSIZE + \
(fs)->lfs_segtabsz)) < (fs)->lfs_avail)
/* Determine if a buffer belongs to the ifile */
@ -306,32 +334,34 @@ struct segsum {
*/
typedef struct block_info {
ino_t bi_inode; /* inode # */
daddr_t bi_lbn; /* logical block w/in file */
daddr_t bi_daddr; /* disk address of block */
ufs_daddr_t bi_lbn; /* logical block w/in file */
ufs_daddr_t bi_daddr; /* disk address of block */
time_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;
/* In-memory description of a segment about to be written. */
struct segment {
struct lfs *fs; /* file system pointer */
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 finfo *fip; /* current fileinfo pointer */
struct vnode *vp; /* vnode being gathered */
void *segsum; /* segment summary info */
u_long ninodes; /* number of inodes in this segment */
u_long seg_bytes_left; /* bytes left in segment */
u_long sum_bytes_left; /* bytes left in summary block */
u_long seg_number; /* number of this segment */
daddr_t *start_lbp; /* beginning lbn for this set */
struct buf *ibp; /* buffer pointer to inode page */
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 */
u_int32_t seg_bytes_left; /* bytes left in segment */
u_int32_t sum_bytes_left; /* bytes left in summary block */
u_int32_t seg_number; /* number of this segment */
ufs_daddr_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 */
u_long seg_flags; /* run-time flags for this segment */
u_int16_t seg_flags; /* run-time flags for this segment */
};
#define ISSPACE(F, BB, C) \
@ -348,18 +378,18 @@ struct segment {
#ifdef DOSTATS
/* Statistics Counters */
struct lfs_stats {
int segsused;
int psegwrites;
int psyncwrites;
int pcleanwrites;
int blocktot;
int cleanblocks;
int ncheckpoints;
int nwrites;
int nsync_writes;
int wait_exceeded;
int write_exceeded;
int flush_invoked;
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;
};
extern struct lfs_stats lfs_stats;
#endif

109
sys/ufs/lfs/lfs_inode.c
View File

@ -30,8 +30,8 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)lfs_inode.c 8.5 (Berkeley) 12/30/93
* $Id: lfs_inode.c,v 1.15 1997/02/22 09:47:21 peter Exp $
* @(#)lfs_inode.c 8.9 (Berkeley) 5/8/95
* $Id: lfs_inode.c,v 1.16 1997/03/22 06:53:37 bde Exp $
*/
#include "opt_quota.h"
@ -58,12 +58,6 @@
#include <ufs/lfs/lfs.h>
#include <ufs/lfs/lfs_extern.h>
int
lfs_init()
{
return (ufs_init());
}
/* Search a block for a specific dinode. */
struct dinode *
lfs_ifind(fs, ino, dip)
@ -114,13 +108,13 @@ lfs_update(ap)
return(0);
if (ip->i_flag & IN_ACCESS)
ip->i_atime.tv_sec = ap->a_access->tv_sec;
ip->i_atime = ap->a_access->tv_sec;
if (ip->i_flag & IN_UPDATE) {
ip->i_mtime.tv_sec = ap->a_modify->tv_sec;
ip->i_mtime = ap->a_modify->tv_sec;
(ip)->i_modrev++;
}
if (ip->i_flag & IN_CHANGE)
ip->i_ctime.tv_sec = time.tv_sec;
ip->i_ctime = time.tv_sec;
ip->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE);
if (!(ip->i_flag & IN_MODIFIED))
@ -139,22 +133,22 @@ lfs_update(ap)
#define UPDATE_SEGUSE \
if (lastseg != -1) { \
LFS_SEGENTRY(sup, fs, lastseg, sup_bp); \
if ((num << fs->lfs_bshift) > sup->su_nbytes) \
if (num > sup->su_nbytes) \
panic("lfs_truncate: negative bytes in segment %d", \
lastseg); \
sup->su_nbytes -= num << fs->lfs_bshift; \
sup->su_nbytes -= num; \
e1 = VOP_BWRITE(sup_bp); \
blocksreleased += num; \
fragsreleased += numfrags(fs, num); \
}
#define SEGDEC { \
#define SEGDEC(S) { \
if (daddr != 0) { \
if (lastseg != (seg = datosn(fs, daddr))) { \
UPDATE_SEGUSE; \
num = 1; \
num = (S); \
lastseg = seg; \
} else \
++num; \
num += (S); \
} \
}
@ -175,7 +169,7 @@ lfs_truncate(ap)
{
register struct indir *inp;
register int i;
register daddr_t *daddrp;
register ufs_daddr_t *daddrp;
register struct vnode *vp = ap->a_vp;
off_t length = ap->a_length;
struct buf *bp, *sup_bp;
@ -185,9 +179,10 @@ lfs_truncate(ap)
struct lfs *fs;
struct indir a[NIADDR + 2], a_end[NIADDR + 2];
SEGUSE *sup;
daddr_t daddr, lastblock, lbn, olastblock;
long off, a_released, blocksreleased, i_released;
int e1, e2, depth, lastseg, num, offset, seg, size;
ufs_daddr_t daddr, lastblock, lbn, olastblock;
ufs_daddr_t oldsize_lastblock, oldsize_newlast, newsize;
long off, a_released, fragsreleased, i_released;
int e1, e2, depth, lastseg, num, offset, seg, freesize;
ip = VTOI(vp);
gettime(&tv);
@ -223,23 +218,28 @@ lfs_truncate(ap)
* Update the size of the file. If the file is not being truncated to
* a block boundry, the contents of the partial block following the end
* of the file must be zero'ed in case it ever become accessable again
* because of subsequent file growth.
* because of subsequent file growth. For this part of the code,
* oldsize_newlast refers to the old size of the new last block in the file.
*/
offset = blkoff(fs, length);
lbn = lblkno(fs, length);
oldsize_newlast = blksize(fs, ip, lbn);
/* Now set oldsize to the current size of the current last block */
oldsize_lastblock = blksize(fs, ip, olastblock);
if (offset == 0)
ip->i_size = length;
else {
lbn = lblkno(fs, length);
#ifdef QUOTA
if (e1 = getinoquota(ip))
return (e1);
#endif
if (e1 = bread(vp, lbn, fs->lfs_bsize, NOCRED, &bp))
if (e1 = bread(vp, lbn, oldsize_newlast, NOCRED, &bp))
return (e1);
ip->i_size = length;
size = blksize(fs);
bzero((char *)bp->b_data + offset, (u_int)(size - offset));
allocbuf(bp, size);
newsize = blksize(fs, ip, lbn);
bzero((char *)bp->b_data + offset, (u_int)(newsize - offset));
allocbuf(bp, newsize);
if (e1 = VOP_BWRITE(bp))
return (e1);
}
@ -247,20 +247,24 @@ lfs_truncate(ap)
* Modify sup->su_nbyte counters for each deleted block; keep track
* of number of blocks removed for ip->i_blocks.
*/
blocksreleased = 0;
fragsreleased = 0;
num = 0;
lastseg = -1;
for (lbn = olastblock; lbn >= lastblock;) {
/* XXX use run length from bmap array to make this faster */
ufs_bmaparray(vp, lbn, &daddr, a, &depth, NULL, NULL);
if (lbn == olastblock)
if (lbn == olastblock) {
for (i = NIADDR + 2; i--;)
a_end[i] = a[i];
freesize = oldsize_lastblock;
} else
freesize = fs->lfs_bsize;
switch (depth) {
case 0: /* Direct block. */
daddr = ip->i_db[lbn];
SEGDEC;
SEGDEC(freesize);
ip->i_db[lbn] = 0;
--lbn;
break;
@ -282,19 +286,20 @@ lfs_truncate(ap)
inp->in_lbn, fs->lfs_bsize, NOCRED, &bp))
panic("lfs_truncate: bread bno %d",
inp->in_lbn);
daddrp = (daddr_t *)bp->b_data + inp->in_off;
daddrp = (ufs_daddr_t *)bp->b_data +
inp->in_off;
for (i = inp->in_off;
i++ <= a_end[depth].in_off;) {
daddr = *daddrp++;
SEGDEC;
SEGDEC(freesize);
}
a_end[depth].in_off = NINDIR(fs) - 1;
if (inp->in_off == 0)
brelse (bp);
else {
bzero((daddr_t *)bp->b_data +
bzero((ufs_daddr_t *)bp->b_data +
inp->in_off, fs->lfs_bsize -
inp->in_off * sizeof(daddr_t));
inp->in_off * sizeof(ufs_daddr_t));
if (e1 = VOP_BWRITE(bp))
return (e1);
}
@ -302,7 +307,7 @@ lfs_truncate(ap)
if (depth == 0 && a[1].in_off == 0) {
off = a[0].in_off;
daddr = ip->i_ib[off];
SEGDEC;
SEGDEC(freesize);
ip->i_ib[off] = 0;
}
if (lbn == lastblock || lbn <= NDADDR)
@ -324,13 +329,14 @@ lfs_truncate(ap)
}
#ifdef DIAGNOSTIC
if (ip->i_blocks < fsbtodb(fs, blocksreleased)) {
printf("lfs_truncate: block count < 0\n");
blocksreleased = ip->i_blocks;
if (ip->i_blocks < fragstodb(fs, fragsreleased)) {
printf("lfs_truncate: frag count < 0\n");
fragsreleased = dbtofrags(fs, ip->i_blocks);
panic("lfs_truncate: frag count < 0\n");
}
#endif
ip->i_blocks -= fsbtodb(fs, blocksreleased);
fs->lfs_bfree += fsbtodb(fs, blocksreleased);
ip->i_blocks -= fragstodb(fs, fragsreleased);
fs->lfs_bfree += fragstodb(fs, fragsreleased);
ip->i_flag |= IN_CHANGE | IN_UPDATE;
/*
* Traverse dirty block list counting number of dirty buffers
@ -341,7 +347,7 @@ lfs_truncate(ap)
i_released = 0;
for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = bp->b_vnbufs.le_next)
if (bp->b_flags & B_LOCKED) {
++a_released;
a_released += numfrags(fs, bp->b_bcount);
/*
* XXX
* When buffers are created in the cache, their block
@ -354,25 +360,28 @@ lfs_truncate(ap)
* here.
*/
if (bp->b_blkno == bp->b_lblkno)
++i_released;
i_released += numfrags(fs, bp->b_bcount);
}
blocksreleased = fsbtodb(fs, i_released);
fragsreleased = i_released;
#ifdef DIAGNOSTIC
if (blocksreleased > ip->i_blocks) {
if (fragsreleased > dbtofrags(fs, ip->i_blocks)) {
printf("lfs_inode: Warning! %s\n",
"more blocks released from inode than are in inode");
blocksreleased = ip->i_blocks;
"more frags released from inode than are in inode");
fragsreleased = dbtofrags(fs, ip->i_blocks);
panic("lfs_inode: Warning. More frags released\n");
}
#endif
fs->lfs_bfree += blocksreleased;
ip->i_blocks -= blocksreleased;
fs->lfs_bfree += fragstodb(fs, fragsreleased);
ip->i_blocks -= fragstodb(fs, fragsreleased);
#ifdef DIAGNOSTIC
if (length == 0 && ip->i_blocks != 0)
if (length == 0 && ip->i_blocks != 0) {
printf("lfs_inode: Warning! %s%ld%s\n",
"Truncation to zero, but ", ip->i_blocks,
" blocks left on inode");
panic("lfs_inode");
}
#endif
fs->lfs_avail += fsbtodb(fs, a_released);
fs->lfs_avail += fragstodb(fs, a_released);
e1 = vinvalbuf(vp, (length > 0) ? V_SAVE : 0, ap->a_cred, ap->a_p,
0, 0);
e2 = VOP_UPDATE(vp, &tv, &tv, 0);