/*
* Actually mark the segment clean.
* Must be called with the segment lock held.
*/
int
lfs_do_segclean(struct lfs *fs, unsigned long segnum)
{
extern int lfs_dostats;
struct buf *bp;
CLEANERINFO *cip;
SEGUSE *sup;
if (lfs_dtosn(fs, lfs_sb_getcurseg(fs)) == segnum) {
return (EBUSY);
}
LFS_SEGENTRY(sup, fs, segnum, bp);
if (sup->su_nbytes) {
DLOG((DLOG_CLEAN, "lfs_segclean: not cleaning segment %lu:"
" %d live bytes\n", segnum, sup->su_nbytes));
brelse(bp, 0);
return (EBUSY);
}
if (sup->su_flags & SEGUSE_ACTIVE) {
DLOG((DLOG_CLEAN, "lfs_segclean: not cleaning segment %lu:"
" segment is active\n", segnum));
brelse(bp, 0);
return (EBUSY);
}
if (!(sup->su_flags & SEGUSE_DIRTY)) {
DLOG((DLOG_CLEAN, "lfs_segclean: not cleaning segment %lu:"
" segment is already clean\n", segnum));
brelse(bp, 0);
return (EALREADY);
}
lfs_sb_addavail(fs, lfs_segtod(fs, 1));
if (sup->su_flags & SEGUSE_SUPERBLOCK)
lfs_sb_subavail(fs, lfs_btofsb(fs, LFS_SBPAD));
if (lfs_sb_getversion(fs) > 1 && segnum == 0 &&
lfs_sb_gets0addr(fs) < lfs_btofsb(fs, LFS_LABELPAD))
lfs_sb_subavail(fs, lfs_btofsb(fs, LFS_LABELPAD) - lfs_sb_gets0addr(fs));
mutex_enter(&lfs_lock);
lfs_sb_addbfree(fs, sup->su_nsums * lfs_btofsb(fs, lfs_sb_getsumsize(fs)) +
lfs_btofsb(fs, sup->su_ninos * lfs_sb_getibsize(fs)));
lfs_sb_subdmeta(fs, sup->su_nsums * lfs_btofsb(fs, lfs_sb_getsumsize(fs)) +
lfs_btofsb(fs, sup->su_ninos * lfs_sb_getibsize(fs)));
if (lfs_sb_getdmeta(fs) < 0)
lfs_sb_setdmeta(fs, 0);
mutex_exit(&lfs_lock);
sup->su_flags &= ~SEGUSE_DIRTY;
LFS_WRITESEGENTRY(sup, fs, segnum, bp);
LFS_CLEANERINFO(cip, fs, bp);
lfs_ci_shiftdirtytoclean(fs, cip, 1);
lfs_sb_setnclean(fs, lfs_ci_getclean(fs, cip));
mutex_enter(&lfs_lock);
lfs_ci_setbfree(fs, cip, lfs_sb_getbfree(fs));
lfs_ci_setavail(fs, cip, lfs_sb_getavail(fs)
- fs->lfs_ravail - fs->lfs_favail);
wakeup(&fs->lfs_availsleep);
mutex_exit(&lfs_lock);
(void) LFS_BWRITE_LOG(bp);
if (lfs_dostats)
++lfs_stats.segs_reclaimed;
return (0);
}
/* VOP_BWRITE 1 time */
int
lfs_fragextend(struct vnode *vp, int osize, int nsize, daddr_t lbn, struct buf **bpp,
kauth_cred_t cred)
{
struct inode *ip;
struct lfs *fs;
long frags;
int error;
extern long locked_queue_bytes;
size_t obufsize;
ip = VTOI(vp);
fs = ip->i_lfs;
frags = (long)lfs_numfrags(fs, nsize - osize);
error = 0;
ASSERT_NO_SEGLOCK(fs);
/*
* Get the seglock so we don't enlarge blocks while a segment
* is being written. If we're called with bpp==NULL, though,
* we are only pretending to change a buffer, so we don't have to
* lock.
*/
top:
if (bpp) {
rw_enter(&fs->lfs_fraglock, RW_READER);
LFS_DEBUG_COUNTLOCKED("frag");
}
if (!ISSPACE(fs, frags, cred)) {
error = ENOSPC;
goto out;
}
/*
* If we are not asked to actually return the block, all we need
* to do is allocate space for it. UBC will handle dirtying the
* appropriate things and making sure it all goes to disk.
* Don't bother to read in that case.
*/
if (bpp && (error = bread(vp, lbn, osize, 0, bpp))) {
goto out;
}
#if defined(LFS_QUOTA) || defined(LFS_QUOTA2)
if ((error = lfs_chkdq(ip, frags, cred, 0))) {
if (bpp)
brelse(*bpp, 0);
goto out;
}
#endif
/*
* Adjust accounting for lfs_avail. If there's not enough room,
* we will have to wait for the cleaner, which we can't do while
* holding a block busy or while holding the seglock. In that case,
* release both and start over after waiting.
*/
if (bpp && ((*bpp)->b_oflags & BO_DELWRI)) {
if (!lfs_fits(fs, frags)) {
if (bpp)
brelse(*bpp, 0);
#if defined(LFS_QUOTA) || defined(LFS_QUOTA2)
lfs_chkdq(ip, -frags, cred, 0);
#endif
rw_exit(&fs->lfs_fraglock);
lfs_availwait(fs, frags);
goto top;
}
lfs_sb_subavail(fs, frags);
}
mutex_enter(&lfs_lock);
lfs_sb_subbfree(fs, frags);
mutex_exit(&lfs_lock);
ip->i_lfs_effnblks += frags;
ip->i_flag |= IN_CHANGE | IN_UPDATE;
if (bpp) {
obufsize = (*bpp)->b_bufsize;
allocbuf(*bpp, nsize, 1);
/* Adjust locked-list accounting */
if (((*bpp)->b_flags & B_LOCKED) != 0 &&
(*bpp)->b_iodone == NULL) {
mutex_enter(&lfs_lock);
locked_queue_bytes += (*bpp)->b_bufsize - obufsize;
mutex_exit(&lfs_lock);
}
memset((char *)((*bpp)->b_data) + osize, 0, (u_int)(nsize - osize));
}
out:
if (bpp) {
rw_exit(&fs->lfs_fraglock);
}
return (error);
}
