Differential D30041 Diff 90889 sys/ufs/ffs/ffs_balloc.c

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sys/ufs/ffs/ffs_balloc.c

Show First 20 Lines • Show All 122 Lines • ▼ Show 20 Lines	if (size > fs->fs_bsize)
panic("ffs_balloc_ufs1: blk too big");		panic("ffs_balloc_ufs1: blk too big");
*bpp = NULL;		*bpp = NULL;
if (flags & IO_EXT)		if (flags & IO_EXT)
return (EOPNOTSUPP);		return (EOPNOTSUPP);
if (lbn < 0)		if (lbn < 0)
return (EFBIG);		return (EFBIG);
gbflags = (flags & BA_UNMAPPED) != 0 ? GB_UNMAPPED : 0;		gbflags = (flags & BA_UNMAPPED) != 0 ? GB_UNMAPPED : 0;

		vn_seqc_write_begin(vp);

/*		/*
* If the next write will extend the file into a new block,		* If the next write will extend the file into a new block,
* and the file is currently composed of a fragment		* and the file is currently composed of a fragment
* this fragment has to be extended to be a full block.		* this fragment has to be extended to be a full block.
*/		*/
lastlbn = lblkno(fs, ip->i_size);		lastlbn = lblkno(fs, ip->i_size);
if (lastlbn < UFS_NDADDR && lastlbn < lbn) {		if (lastlbn < UFS_NDADDR && lastlbn < lbn) {
nb = lastlbn;		nb = lastlbn;
osize = blksize(fs, ip, nb);		osize = blksize(fs, ip, nb);
if (osize < fs->fs_bsize && osize > 0) {		if (osize < fs->fs_bsize && osize > 0) {
UFS_LOCK(ump);		UFS_LOCK(ump);
error = ffs_realloccg(ip, nb, dp->di_db[nb],		error = ffs_realloccg(ip, nb, dp->di_db[nb],
ffs_blkpref_ufs1(ip, lastlbn, (int)nb,		ffs_blkpref_ufs1(ip, lastlbn, (int)nb,
&dp->di_db[0]), osize, (int)fs->fs_bsize, flags,		&dp->di_db[0]), osize, (int)fs->fs_bsize, flags,
cred, &bp);		cred, &bp);
if (error)		if (error)
return (error);		goto done;
if (DOINGSOFTDEP(vp))		if (DOINGSOFTDEP(vp))
softdep_setup_allocdirect(ip, nb,		softdep_setup_allocdirect(ip, nb,
dbtofsb(fs, bp->b_blkno), dp->di_db[nb],		dbtofsb(fs, bp->b_blkno), dp->di_db[nb],
fs->fs_bsize, osize, bp);		fs->fs_bsize, osize, bp);
ip->i_size = smalllblktosize(fs, nb + 1);		ip->i_size = smalllblktosize(fs, nb + 1);
dp->di_size = ip->i_size;		dp->di_size = ip->i_size;
dp->di_db[nb] = dbtofsb(fs, bp->b_blkno);		dp->di_db[nb] = dbtofsb(fs, bp->b_blkno);
UFS_INODE_SET_FLAG(ip,		UFS_INODE_SET_FLAG(ip,
Show All 13 Lines	if (lbn < UFS_NDADDR) {
if (flags & BA_METAONLY)		if (flags & BA_METAONLY)
panic("ffs_balloc_ufs1: BA_METAONLY for direct block");		panic("ffs_balloc_ufs1: BA_METAONLY for direct block");
nb = dp->di_db[lbn];		nb = dp->di_db[lbn];
if (nb != 0 && ip->i_size >= smalllblktosize(fs, lbn + 1)) {		if (nb != 0 && ip->i_size >= smalllblktosize(fs, lbn + 1)) {
if ((flags & BA_CLRBUF) != 0) {		if ((flags & BA_CLRBUF) != 0) {
error = bread(vp, lbn, fs->fs_bsize, NOCRED,		error = bread(vp, lbn, fs->fs_bsize, NOCRED,
&bp);		&bp);
if (error != 0)		if (error != 0)
return (error);		goto done;
} else {		} else {
bp = getblk(vp, lbn, fs->fs_bsize, 0, 0,		bp = getblk(vp, lbn, fs->fs_bsize, 0, 0,
gbflags);		gbflags);
if (bp == NULL)		if (bp == NULL) {
return (EIO);		error = EIO;
		goto done;
		}
vfs_bio_clrbuf(bp);		vfs_bio_clrbuf(bp);
}		}
bp->b_blkno = fsbtodb(fs, nb);		bp->b_blkno = fsbtodb(fs, nb);
*bpp = bp;		*bpp = bp;
return (0);		error = 0;
		goto done;
}		}
if (nb != 0) {		if (nb != 0) {
/*		/*
* Consider need to reallocate a fragment.		* Consider need to reallocate a fragment.
*/		*/
osize = fragroundup(fs, blkoff(fs, ip->i_size));		osize = fragroundup(fs, blkoff(fs, ip->i_size));
nsize = fragroundup(fs, size);		nsize = fragroundup(fs, size);
if (nsize <= osize) {		if (nsize <= osize) {
error = bread(vp, lbn, osize, NOCRED, &bp);		error = bread(vp, lbn, osize, NOCRED, &bp);
if (error) {		if (error)
return (error);		goto done;
}
bp->b_blkno = fsbtodb(fs, nb);		bp->b_blkno = fsbtodb(fs, nb);
} else {		} else {
UFS_LOCK(ump);		UFS_LOCK(ump);
error = ffs_realloccg(ip, lbn, dp->di_db[lbn],		error = ffs_realloccg(ip, lbn, dp->di_db[lbn],
ffs_blkpref_ufs1(ip, lbn, (int)lbn,		ffs_blkpref_ufs1(ip, lbn, (int)lbn,
&dp->di_db[0]), osize, nsize, flags,		&dp->di_db[0]), osize, nsize, flags,
cred, &bp);		cred, &bp);
if (error)		if (error)
return (error);		goto done;
if (DOINGSOFTDEP(vp))		if (DOINGSOFTDEP(vp))
softdep_setup_allocdirect(ip, lbn,		softdep_setup_allocdirect(ip, lbn,
dbtofsb(fs, bp->b_blkno), nb,		dbtofsb(fs, bp->b_blkno), nb,
nsize, osize, bp);		nsize, osize, bp);
}		}
} else {		} else {
if (ip->i_size < smalllblktosize(fs, lbn + 1))		if (ip->i_size < smalllblktosize(fs, lbn + 1))
nsize = fragroundup(fs, size);		nsize = fragroundup(fs, size);
else		else
nsize = fs->fs_bsize;		nsize = fs->fs_bsize;
UFS_LOCK(ump);		UFS_LOCK(ump);
error = ffs_alloc(ip, lbn,		error = ffs_alloc(ip, lbn,
ffs_blkpref_ufs1(ip, lbn, (int)lbn, &dp->di_db[0]),		ffs_blkpref_ufs1(ip, lbn, (int)lbn, &dp->di_db[0]),
nsize, flags, cred, &newb);		nsize, flags, cred, &newb);
if (error)		if (error)
return (error);		goto done;
bp = getblk(vp, lbn, nsize, 0, 0, gbflags);		bp = getblk(vp, lbn, nsize, 0, 0, gbflags);
bp->b_blkno = fsbtodb(fs, newb);		bp->b_blkno = fsbtodb(fs, newb);
if (flags & BA_CLRBUF)		if (flags & BA_CLRBUF)
vfs_bio_clrbuf(bp);		vfs_bio_clrbuf(bp);
if (DOINGSOFTDEP(vp))		if (DOINGSOFTDEP(vp))
softdep_setup_allocdirect(ip, lbn, newb, 0,		softdep_setup_allocdirect(ip, lbn, newb, 0,
nsize, 0, bp);		nsize, 0, bp);
}		}
dp->di_db[lbn] = dbtofsb(fs, bp->b_blkno);		dp->di_db[lbn] = dbtofsb(fs, bp->b_blkno);
UFS_INODE_SET_FLAG(ip, IN_CHANGE \| IN_UPDATE \| IN_IBLKDATA);		UFS_INODE_SET_FLAG(ip, IN_CHANGE \| IN_UPDATE \| IN_IBLKDATA);
*bpp = bp;		*bpp = bp;
return (0);		error = 0;
		goto done;
}		}
/*		/*
* Determine the number of levels of indirection.		* Determine the number of levels of indirection.
*/		*/
pref = 0;		pref = 0;
if ((error = ufs_getlbns(vp, lbn, indirs, &num)) != 0)		if ((error = ufs_getlbns(vp, lbn, indirs, &num)) != 0)
return(error);		goto done;
#ifdef INVARIANTS		#ifdef INVARIANTS
if (num < 1)		if (num < 1)
panic ("ffs_balloc_ufs1: ufs_getlbns returned indirect block");		panic ("ffs_balloc_ufs1: ufs_getlbns returned indirect block");
#endif		#endif
saved_inbdflush = curthread_pflags_set(TDP_INBDFLUSH);		saved_inbdflush = curthread_pflags_set(TDP_INBDFLUSH);
/*		/*
* Fetch the first indirect block allocating if necessary.		* Fetch the first indirect block allocating if necessary.
*/		*/
--num;		--num;
nb = dp->di_ib[indirs[0].in_off];		nb = dp->di_ib[indirs[0].in_off];
allocib = NULL;		allocib = NULL;
allocblk = allociblk;		allocblk = allociblk;
lbns_remfree = lbns;		lbns_remfree = lbns;
if (nb == 0) {		if (nb == 0) {
UFS_LOCK(ump);		UFS_LOCK(ump);
pref = ffs_blkpref_ufs1(ip, lbn, -indirs[0].in_off - 1,		pref = ffs_blkpref_ufs1(ip, lbn, -indirs[0].in_off - 1,
(ufs1_daddr_t *)0);		(ufs1_daddr_t *)0);
if ((error = ffs_alloc(ip, lbn, pref, (int)fs->fs_bsize,		if ((error = ffs_alloc(ip, lbn, pref, (int)fs->fs_bsize,
flags, cred, &newb)) != 0) {		flags, cred, &newb)) != 0) {
curthread_pflags_restore(saved_inbdflush);		curthread_pflags_restore(saved_inbdflush);
return (error);		goto done;
}		}
pref = newb + fs->fs_frag;		pref = newb + fs->fs_frag;
nb = newb;		nb = newb;
MPASS(allocblk < allociblk + nitems(allociblk));		MPASS(allocblk < allociblk + nitems(allociblk));
MPASS(lbns_remfree < lbns + nitems(lbns));		MPASS(lbns_remfree < lbns + nitems(lbns));
*allocblk++ = nb;		*allocblk++ = nb;
*lbns_remfree++ = indirs[1].in_lbn;		*lbns_remfree++ = indirs[1].in_lbn;
bp = getblk(vp, indirs[1].in_lbn, fs->fs_bsize, 0, 0, gbflags);		bp = getblk(vp, indirs[1].in_lbn, fs->fs_bsize, 0, 0, gbflags);
▲ Show 20 Lines • Show All 109 Lines • ▼ Show 20 Lines	for (i = 1;;) {
}		}
}		}
/*		/*
* If asked only for the indirect block, then return it.		* If asked only for the indirect block, then return it.
*/		*/
if (flags & BA_METAONLY) {		if (flags & BA_METAONLY) {
curthread_pflags_restore(saved_inbdflush);		curthread_pflags_restore(saved_inbdflush);
*bpp = bp;		*bpp = bp;
return (0);		error = 0;
		goto done;
}		}
/*		/*
* Get the data block, allocating if necessary.		* Get the data block, allocating if necessary.
*/		*/
if (nb == 0) {		if (nb == 0) {
UFS_LOCK(ump);		UFS_LOCK(ump);
/*		/*
* If allocating metadata at the front of the cylinder		* If allocating metadata at the front of the cylinder
▲ Show 20 Lines • Show All 49 Lines • ▼ Show 20 Lines	if (flags & IO_SYNC) {
bwrite(bp);		bwrite(bp);
} else {		} else {
if (bp->b_bufsize == fs->fs_bsize)		if (bp->b_bufsize == fs->fs_bsize)
bp->b_flags \|= B_CLUSTEROK;		bp->b_flags \|= B_CLUSTEROK;
bdwrite(bp);		bdwrite(bp);
}		}
curthread_pflags_restore(saved_inbdflush);		curthread_pflags_restore(saved_inbdflush);
*bpp = nbp;		*bpp = nbp;
return (0);		error = 0;
		goto done;
}		}
brelse(bp);		brelse(bp);
if (flags & BA_CLRBUF) {		if (flags & BA_CLRBUF) {
int seqcount = (flags & BA_SEQMASK) >> BA_SEQSHIFT;		int seqcount = (flags & BA_SEQMASK) >> BA_SEQSHIFT;
if (seqcount != 0 &&		if (seqcount != 0 &&
(vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0 &&		(vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0 &&
!(vm_page_count_severe() \|\| buf_dirty_count_severe())) {		!(vm_page_count_severe() \|\| buf_dirty_count_severe())) {
error = cluster_read(vp, ip->i_size, lbn,		error = cluster_read(vp, ip->i_size, lbn,
(int)fs->fs_bsize, NOCRED,		(int)fs->fs_bsize, NOCRED,
MAXBSIZE, seqcount, gbflags, &nbp);		MAXBSIZE, seqcount, gbflags, &nbp);
} else {		} else {
error = bread_gb(vp, lbn, (int)fs->fs_bsize, NOCRED,		error = bread_gb(vp, lbn, (int)fs->fs_bsize, NOCRED,
gbflags, &nbp);		gbflags, &nbp);
}		}
if (error) {		if (error) {
brelse(nbp);		brelse(nbp);
goto fail;		goto fail;
}		}
} else {		} else {
nbp = getblk(vp, lbn, fs->fs_bsize, 0, 0, gbflags);		nbp = getblk(vp, lbn, fs->fs_bsize, 0, 0, gbflags);
nbp->b_blkno = fsbtodb(fs, nb);		nbp->b_blkno = fsbtodb(fs, nb);
}		}
curthread_pflags_restore(saved_inbdflush);		curthread_pflags_restore(saved_inbdflush);
*bpp = nbp;		*bpp = nbp;
return (0);		error = 0;
		goto done;
fail:		fail:
curthread_pflags_restore(saved_inbdflush);		curthread_pflags_restore(saved_inbdflush);
/*		/*
* If we have failed to allocate any blocks, simply return the error.		* If we have failed to allocate any blocks, simply return the error.
* This is the usual case and avoids the need to fsync the file.		* This is the usual case and avoids the need to fsync the file.
*/		*/
if (allocblk == allociblk && allocib == NULL && unwindidx == -1)		if (allocblk == allociblk && allocib == NULL && unwindidx == -1)
return (error);		goto done;
/*		/*
* If we have failed part way through block allocation, we		* If we have failed part way through block allocation, we
* have to deallocate any indirect blocks that we have allocated.		* have to deallocate any indirect blocks that we have allocated.
* We have to fsync the file before we start to get rid of all		* We have to fsync the file before we start to get rid of all
* of its dependencies so that we do not leave them dangling.		* of its dependencies so that we do not leave them dangling.
* We have to sync it at the end so that the soft updates code		* We have to sync it at the end so that the soft updates code
* does not find any untracked changes. Although this is really		* does not find any untracked changes. Although this is really
* slow, running out of disk space is not expected to be a common		* slow, running out of disk space is not expected to be a common
▲ Show 20 Lines • Show All 71 Lines • ▼ Show 20 Lines	if (bp != NULL) {
(intmax_t)bp->b_lblkno, (uintmax_t)bp->b_blkno,		(intmax_t)bp->b_lblkno, (uintmax_t)bp->b_blkno,
(uintmax_t)fsbtodb(fs, *blkp));		(uintmax_t)fsbtodb(fs, *blkp));
}		}
lbns_remfree++;		lbns_remfree++;
#endif		#endif
ffs_blkfree(ump, fs, ump->um_devvp, *blkp, fs->fs_bsize,		ffs_blkfree(ump, fs, ump->um_devvp, *blkp, fs->fs_bsize,
ip->i_number, vp->v_type, NULL, SINGLETON_KEY);		ip->i_number, vp->v_type, NULL, SINGLETON_KEY);
}		}
		done:
		vn_seqc_write_end(vp);
return (error);		return (error);
}		}

/*		/*
* Balloc defines the structure of file system storage		* Balloc defines the structure of file system storage
* by allocating the physical blocks on a device given		* by allocating the physical blocks on a device given
* the inode and the logical block number in a file.		* the inode and the logical block number in a file.
* This is the allocation strategy for UFS2. Above is		* This is the allocation strategy for UFS2. Above is
Show All 29 Lines	ffs_balloc_ufs2(struct vnode *vp, off_t startoffset, int size,
reclaimed = 0;		reclaimed = 0;
if (size > fs->fs_bsize)		if (size > fs->fs_bsize)
panic("ffs_balloc_ufs2: blk too big");		panic("ffs_balloc_ufs2: blk too big");
*bpp = NULL;		*bpp = NULL;
if (lbn < 0)		if (lbn < 0)
return (EFBIG);		return (EFBIG);
gbflags = (flags & BA_UNMAPPED) != 0 ? GB_UNMAPPED : 0;		gbflags = (flags & BA_UNMAPPED) != 0 ? GB_UNMAPPED : 0;

		vn_seqc_write_begin(vp);

/*		/*
* Check for allocating external data.		* Check for allocating external data.
*/		*/
if (flags & IO_EXT) {		if (flags & IO_EXT) {
if (lbn >= UFS_NXADDR)		if (lbn >= UFS_NXADDR) {
return (EFBIG);		error = EFBIG;
		goto done;
		}

/*		/*
* If the next write will extend the data into a new block,		* If the next write will extend the data into a new block,
* and the data is currently composed of a fragment		* and the data is currently composed of a fragment
* this fragment has to be extended to be a full block.		* this fragment has to be extended to be a full block.
*/		*/
lastlbn = lblkno(fs, dp->di_extsize);		lastlbn = lblkno(fs, dp->di_extsize);
if (lastlbn < lbn) {		if (lastlbn < lbn) {
nb = lastlbn;		nb = lastlbn;
osize = sblksize(fs, dp->di_extsize, nb);		osize = sblksize(fs, dp->di_extsize, nb);
if (osize < fs->fs_bsize && osize > 0) {		if (osize < fs->fs_bsize && osize > 0) {
UFS_LOCK(ump);		UFS_LOCK(ump);
error = ffs_realloccg(ip, -1 - nb,		error = ffs_realloccg(ip, -1 - nb,
dp->di_extb[nb],		dp->di_extb[nb],
ffs_blkpref_ufs2(ip, lastlbn, (int)nb,		ffs_blkpref_ufs2(ip, lastlbn, (int)nb,
&dp->di_extb[0]), osize,		&dp->di_extb[0]), osize,
(int)fs->fs_bsize, flags, cred, &bp);		(int)fs->fs_bsize, flags, cred, &bp);
if (error)		if (error)
return (error);		goto done;
if (DOINGSOFTDEP(vp))		if (DOINGSOFTDEP(vp))
softdep_setup_allocext(ip, nb,		softdep_setup_allocext(ip, nb,
dbtofsb(fs, bp->b_blkno),		dbtofsb(fs, bp->b_blkno),
dp->di_extb[nb],		dp->di_extb[nb],
fs->fs_bsize, osize, bp);		fs->fs_bsize, osize, bp);
dp->di_extsize = smalllblktosize(fs, nb + 1);		dp->di_extsize = smalllblktosize(fs, nb + 1);
dp->di_extb[nb] = dbtofsb(fs, bp->b_blkno);		dp->di_extb[nb] = dbtofsb(fs, bp->b_blkno);
bp->b_xflags \|= BX_ALTDATA;		bp->b_xflags \|= BX_ALTDATA;
Show All 9 Lines	if (flags & IO_EXT) {
* All blocks are direct blocks		* All blocks are direct blocks
*/		*/
if (flags & BA_METAONLY)		if (flags & BA_METAONLY)
panic("ffs_balloc_ufs2: BA_METAONLY for ext block");		panic("ffs_balloc_ufs2: BA_METAONLY for ext block");
nb = dp->di_extb[lbn];		nb = dp->di_extb[lbn];
if (nb != 0 && dp->di_extsize >= smalllblktosize(fs, lbn + 1)) {		if (nb != 0 && dp->di_extsize >= smalllblktosize(fs, lbn + 1)) {
error = bread_gb(vp, -1 - lbn, fs->fs_bsize, NOCRED,		error = bread_gb(vp, -1 - lbn, fs->fs_bsize, NOCRED,
gbflags, &bp);		gbflags, &bp);
if (error) {		if (error)
return (error);		goto done;
}
bp->b_blkno = fsbtodb(fs, nb);		bp->b_blkno = fsbtodb(fs, nb);
bp->b_xflags \|= BX_ALTDATA;		bp->b_xflags \|= BX_ALTDATA;
*bpp = bp;		*bpp = bp;
return (0);		goto done;
}		}
if (nb != 0) {		if (nb != 0) {
/*		/*
* Consider need to reallocate a fragment.		* Consider need to reallocate a fragment.
*/		*/
osize = fragroundup(fs, blkoff(fs, dp->di_extsize));		osize = fragroundup(fs, blkoff(fs, dp->di_extsize));
nsize = fragroundup(fs, size);		nsize = fragroundup(fs, size);
if (nsize <= osize) {		if (nsize <= osize) {
error = bread_gb(vp, -1 - lbn, osize, NOCRED,		error = bread_gb(vp, -1 - lbn, osize, NOCRED,
gbflags, &bp);		gbflags, &bp);
if (error) {		if (error)
return (error);		goto done;
}
bp->b_blkno = fsbtodb(fs, nb);		bp->b_blkno = fsbtodb(fs, nb);
bp->b_xflags \|= BX_ALTDATA;		bp->b_xflags \|= BX_ALTDATA;
} else {		} else {
UFS_LOCK(ump);		UFS_LOCK(ump);
error = ffs_realloccg(ip, -1 - lbn,		error = ffs_realloccg(ip, -1 - lbn,
dp->di_extb[lbn],		dp->di_extb[lbn],
ffs_blkpref_ufs2(ip, lbn, (int)lbn,		ffs_blkpref_ufs2(ip, lbn, (int)lbn,
&dp->di_extb[0]), osize, nsize, flags,		&dp->di_extb[0]), osize, nsize, flags,
cred, &bp);		cred, &bp);
if (error)		if (error)
return (error);		goto done;
bp->b_xflags \|= BX_ALTDATA;		bp->b_xflags \|= BX_ALTDATA;
if (DOINGSOFTDEP(vp))		if (DOINGSOFTDEP(vp))
softdep_setup_allocext(ip, lbn,		softdep_setup_allocext(ip, lbn,
dbtofsb(fs, bp->b_blkno), nb,		dbtofsb(fs, bp->b_blkno), nb,
nsize, osize, bp);		nsize, osize, bp);
}		}
} else {		} else {
if (dp->di_extsize < smalllblktosize(fs, lbn + 1))		if (dp->di_extsize < smalllblktosize(fs, lbn + 1))
nsize = fragroundup(fs, size);		nsize = fragroundup(fs, size);
else		else
nsize = fs->fs_bsize;		nsize = fs->fs_bsize;
UFS_LOCK(ump);		UFS_LOCK(ump);
error = ffs_alloc(ip, lbn,		error = ffs_alloc(ip, lbn,
ffs_blkpref_ufs2(ip, lbn, (int)lbn, &dp->di_extb[0]),		ffs_blkpref_ufs2(ip, lbn, (int)lbn, &dp->di_extb[0]),
nsize, flags, cred, &newb);		nsize, flags, cred, &newb);
if (error)		if (error)
return (error);		goto done;
bp = getblk(vp, -1 - lbn, nsize, 0, 0, gbflags);		bp = getblk(vp, -1 - lbn, nsize, 0, 0, gbflags);
bp->b_blkno = fsbtodb(fs, newb);		bp->b_blkno = fsbtodb(fs, newb);
bp->b_xflags \|= BX_ALTDATA;		bp->b_xflags \|= BX_ALTDATA;
if (flags & BA_CLRBUF)		if (flags & BA_CLRBUF)
vfs_bio_clrbuf(bp);		vfs_bio_clrbuf(bp);
if (DOINGSOFTDEP(vp))		if (DOINGSOFTDEP(vp))
softdep_setup_allocext(ip, lbn, newb, 0,		softdep_setup_allocext(ip, lbn, newb, 0,
nsize, 0, bp);		nsize, 0, bp);
}		}
dp->di_extb[lbn] = dbtofsb(fs, bp->b_blkno);		dp->di_extb[lbn] = dbtofsb(fs, bp->b_blkno);
UFS_INODE_SET_FLAG(ip, IN_CHANGE \| IN_IBLKDATA);		UFS_INODE_SET_FLAG(ip, IN_CHANGE \| IN_IBLKDATA);
*bpp = bp;		*bpp = bp;
return (0);		error = 0;
		goto done;
}		}
/*		/*
* If the next write will extend the file into a new block,		* If the next write will extend the file into a new block,
* and the file is currently composed of a fragment		* and the file is currently composed of a fragment
* this fragment has to be extended to be a full block.		* this fragment has to be extended to be a full block.
*/		*/
lastlbn = lblkno(fs, ip->i_size);		lastlbn = lblkno(fs, ip->i_size);
if (lastlbn < UFS_NDADDR && lastlbn < lbn) {		if (lastlbn < UFS_NDADDR && lastlbn < lbn) {
nb = lastlbn;		nb = lastlbn;
osize = blksize(fs, ip, nb);		osize = blksize(fs, ip, nb);
if (osize < fs->fs_bsize && osize > 0) {		if (osize < fs->fs_bsize && osize > 0) {
UFS_LOCK(ump);		UFS_LOCK(ump);
error = ffs_realloccg(ip, nb, dp->di_db[nb],		error = ffs_realloccg(ip, nb, dp->di_db[nb],
ffs_blkpref_ufs2(ip, lastlbn, (int)nb,		ffs_blkpref_ufs2(ip, lastlbn, (int)nb,
&dp->di_db[0]), osize, (int)fs->fs_bsize,		&dp->di_db[0]), osize, (int)fs->fs_bsize,
flags, cred, &bp);		flags, cred, &bp);
if (error)		if (error)
return (error);		goto done;
if (DOINGSOFTDEP(vp))		if (DOINGSOFTDEP(vp))
softdep_setup_allocdirect(ip, nb,		softdep_setup_allocdirect(ip, nb,
dbtofsb(fs, bp->b_blkno),		dbtofsb(fs, bp->b_blkno),
dp->di_db[nb],		dp->di_db[nb],
fs->fs_bsize, osize, bp);		fs->fs_bsize, osize, bp);
ip->i_size = smalllblktosize(fs, nb + 1);		ip->i_size = smalllblktosize(fs, nb + 1);
dp->di_size = ip->i_size;		dp->di_size = ip->i_size;
dp->di_db[nb] = dbtofsb(fs, bp->b_blkno);		dp->di_db[nb] = dbtofsb(fs, bp->b_blkno);
Show All 12 Lines	if (lbn < UFS_NDADDR) {
if (flags & BA_METAONLY)		if (flags & BA_METAONLY)
panic("ffs_balloc_ufs2: BA_METAONLY for direct block");		panic("ffs_balloc_ufs2: BA_METAONLY for direct block");
nb = dp->di_db[lbn];		nb = dp->di_db[lbn];
if (nb != 0 && ip->i_size >= smalllblktosize(fs, lbn + 1)) {		if (nb != 0 && ip->i_size >= smalllblktosize(fs, lbn + 1)) {
if ((flags & BA_CLRBUF) != 0) {		if ((flags & BA_CLRBUF) != 0) {
error = bread_gb(vp, lbn, fs->fs_bsize, NOCRED,		error = bread_gb(vp, lbn, fs->fs_bsize, NOCRED,
gbflags, &bp);		gbflags, &bp);
if (error != 0)		if (error != 0)
return (error);		goto done;
} else {		} else {
bp = getblk(vp, lbn, fs->fs_bsize, 0, 0,		bp = getblk(vp, lbn, fs->fs_bsize, 0, 0,
gbflags);		gbflags);
if (bp == NULL)		if (bp == NULL) {
return (EIO);		error = EIO;
		goto done;
		}
vfs_bio_clrbuf(bp);		vfs_bio_clrbuf(bp);
}		}
bp->b_blkno = fsbtodb(fs, nb);		bp->b_blkno = fsbtodb(fs, nb);
*bpp = bp;		*bpp = bp;
return (0);		error = 0;
		goto done;
}		}
if (nb != 0) {		if (nb != 0) {
/*		/*
* Consider need to reallocate a fragment.		* Consider need to reallocate a fragment.
*/		*/
osize = fragroundup(fs, blkoff(fs, ip->i_size));		osize = fragroundup(fs, blkoff(fs, ip->i_size));
nsize = fragroundup(fs, size);		nsize = fragroundup(fs, size);
if (nsize <= osize) {		if (nsize <= osize) {
error = bread_gb(vp, lbn, osize, NOCRED,		error = bread_gb(vp, lbn, osize, NOCRED,
gbflags, &bp);		gbflags, &bp);
if (error) {		if (error)
return (error);		goto done;
}
bp->b_blkno = fsbtodb(fs, nb);		bp->b_blkno = fsbtodb(fs, nb);
} else {		} else {
UFS_LOCK(ump);		UFS_LOCK(ump);
error = ffs_realloccg(ip, lbn, dp->di_db[lbn],		error = ffs_realloccg(ip, lbn, dp->di_db[lbn],
ffs_blkpref_ufs2(ip, lbn, (int)lbn,		ffs_blkpref_ufs2(ip, lbn, (int)lbn,
&dp->di_db[0]), osize, nsize, flags,		&dp->di_db[0]), osize, nsize, flags,
cred, &bp);		cred, &bp);
if (error)		if (error)
return (error);		goto done;
if (DOINGSOFTDEP(vp))		if (DOINGSOFTDEP(vp))
softdep_setup_allocdirect(ip, lbn,		softdep_setup_allocdirect(ip, lbn,
dbtofsb(fs, bp->b_blkno), nb,		dbtofsb(fs, bp->b_blkno), nb,
nsize, osize, bp);		nsize, osize, bp);
}		}
} else {		} else {
if (ip->i_size < smalllblktosize(fs, lbn + 1))		if (ip->i_size < smalllblktosize(fs, lbn + 1))
nsize = fragroundup(fs, size);		nsize = fragroundup(fs, size);
else		else
nsize = fs->fs_bsize;		nsize = fs->fs_bsize;
UFS_LOCK(ump);		UFS_LOCK(ump);
error = ffs_alloc(ip, lbn,		error = ffs_alloc(ip, lbn,
ffs_blkpref_ufs2(ip, lbn, (int)lbn,		ffs_blkpref_ufs2(ip, lbn, (int)lbn,
&dp->di_db[0]), nsize, flags, cred, &newb);		&dp->di_db[0]), nsize, flags, cred, &newb);
if (error)		if (error)
return (error);		goto done;
bp = getblk(vp, lbn, nsize, 0, 0, gbflags);		bp = getblk(vp, lbn, nsize, 0, 0, gbflags);
bp->b_blkno = fsbtodb(fs, newb);		bp->b_blkno = fsbtodb(fs, newb);
if (flags & BA_CLRBUF)		if (flags & BA_CLRBUF)
vfs_bio_clrbuf(bp);		vfs_bio_clrbuf(bp);
if (DOINGSOFTDEP(vp))		if (DOINGSOFTDEP(vp))
softdep_setup_allocdirect(ip, lbn, newb, 0,		softdep_setup_allocdirect(ip, lbn, newb, 0,
nsize, 0, bp);		nsize, 0, bp);
}		}
dp->di_db[lbn] = dbtofsb(fs, bp->b_blkno);		dp->di_db[lbn] = dbtofsb(fs, bp->b_blkno);
UFS_INODE_SET_FLAG(ip, IN_CHANGE \| IN_UPDATE \| IN_IBLKDATA);		UFS_INODE_SET_FLAG(ip, IN_CHANGE \| IN_UPDATE \| IN_IBLKDATA);
*bpp = bp;		*bpp = bp;
return (0);		error = 0;
		goto done;
}		}
/*		/*
* Determine the number of levels of indirection.		* Determine the number of levels of indirection.
*/		*/
pref = 0;		pref = 0;
if ((error = ufs_getlbns(vp, lbn, indirs, &num)) != 0)		if ((error = ufs_getlbns(vp, lbn, indirs, &num)) != 0)
return(error);		goto done;
#ifdef INVARIANTS		#ifdef INVARIANTS
if (num < 1)		if (num < 1)
panic ("ffs_balloc_ufs2: ufs_getlbns returned indirect block");		panic ("ffs_balloc_ufs2: ufs_getlbns returned indirect block");
#endif		#endif
saved_inbdflush = curthread_pflags_set(TDP_INBDFLUSH);		saved_inbdflush = curthread_pflags_set(TDP_INBDFLUSH);
/*		/*
* Fetch the first indirect block allocating if necessary.		* Fetch the first indirect block allocating if necessary.
*/		*/
--num;		--num;
nb = dp->di_ib[indirs[0].in_off];		nb = dp->di_ib[indirs[0].in_off];
allocib = NULL;		allocib = NULL;
allocblk = allociblk;		allocblk = allociblk;
lbns_remfree = lbns;		lbns_remfree = lbns;
if (nb == 0) {		if (nb == 0) {
UFS_LOCK(ump);		UFS_LOCK(ump);
pref = ffs_blkpref_ufs2(ip, lbn, -indirs[0].in_off - 1,		pref = ffs_blkpref_ufs2(ip, lbn, -indirs[0].in_off - 1,
(ufs2_daddr_t *)0);		(ufs2_daddr_t *)0);
if ((error = ffs_alloc(ip, lbn, pref, (int)fs->fs_bsize,		if ((error = ffs_alloc(ip, lbn, pref, (int)fs->fs_bsize,
flags, cred, &newb)) != 0) {		flags, cred, &newb)) != 0) {
curthread_pflags_restore(saved_inbdflush);		curthread_pflags_restore(saved_inbdflush);
return (error);		goto done;
}		}
pref = newb + fs->fs_frag;		pref = newb + fs->fs_frag;
nb = newb;		nb = newb;
MPASS(allocblk < allociblk + nitems(allociblk));		MPASS(allocblk < allociblk + nitems(allociblk));
MPASS(lbns_remfree < lbns + nitems(lbns));		MPASS(lbns_remfree < lbns + nitems(lbns));
*allocblk++ = nb;		*allocblk++ = nb;
*lbns_remfree++ = indirs[1].in_lbn;		*lbns_remfree++ = indirs[1].in_lbn;
bp = getblk(vp, indirs[1].in_lbn, fs->fs_bsize, 0, 0,		bp = getblk(vp, indirs[1].in_lbn, fs->fs_bsize, 0, 0,
▲ Show 20 Lines • Show All 111 Lines • ▼ Show 20 Lines	for (i = 1;;) {
}		}
}		}
/*		/*
* If asked only for the indirect block, then return it.		* If asked only for the indirect block, then return it.
*/		*/
if (flags & BA_METAONLY) {		if (flags & BA_METAONLY) {
curthread_pflags_restore(saved_inbdflush);		curthread_pflags_restore(saved_inbdflush);
*bpp = bp;		*bpp = bp;
return (0);		error = 0;
		goto done;
}		}
/*		/*
* Get the data block, allocating if necessary.		* Get the data block, allocating if necessary.
*/		*/
if (nb == 0) {		if (nb == 0) {
UFS_LOCK(ump);		UFS_LOCK(ump);
/*		/*
* If allocating metadata at the front of the cylinder		* If allocating metadata at the front of the cylinder
▲ Show 20 Lines • Show All 49 Lines • ▼ Show 20 Lines	if (flags & IO_SYNC) {
bwrite(bp);		bwrite(bp);
} else {		} else {
if (bp->b_bufsize == fs->fs_bsize)		if (bp->b_bufsize == fs->fs_bsize)
bp->b_flags \|= B_CLUSTEROK;		bp->b_flags \|= B_CLUSTEROK;
bdwrite(bp);		bdwrite(bp);
}		}
curthread_pflags_restore(saved_inbdflush);		curthread_pflags_restore(saved_inbdflush);
*bpp = nbp;		*bpp = nbp;
return (0);		error = 0;
		goto done;
}		}
brelse(bp);		brelse(bp);
/*		/*
* If requested clear invalid portions of the buffer. If we		* If requested clear invalid portions of the buffer. If we
* have to do a read-before-write (typical if BA_CLRBUF is set),		* have to do a read-before-write (typical if BA_CLRBUF is set),
* try to do some read-ahead in the sequential case to reduce		* try to do some read-ahead in the sequential case to reduce
* the number of I/O transactions.		* the number of I/O transactions.
*/		*/
Show All 14 Lines	if (error) {
goto fail;		goto fail;
}		}
} else {		} else {
nbp = getblk(vp, lbn, fs->fs_bsize, 0, 0, gbflags);		nbp = getblk(vp, lbn, fs->fs_bsize, 0, 0, gbflags);
nbp->b_blkno = fsbtodb(fs, nb);		nbp->b_blkno = fsbtodb(fs, nb);
}		}
curthread_pflags_restore(saved_inbdflush);		curthread_pflags_restore(saved_inbdflush);
*bpp = nbp;		*bpp = nbp;
return (0);		error = 0;
		goto done;
fail:		fail:
curthread_pflags_restore(saved_inbdflush);		curthread_pflags_restore(saved_inbdflush);
/*		/*
* If we have failed to allocate any blocks, simply return the error.		* If we have failed to allocate any blocks, simply return the error.
* This is the usual case and avoids the need to fsync the file.		* This is the usual case and avoids the need to fsync the file.
*/		*/
if (allocblk == allociblk && allocib == NULL && unwindidx == -1)		if (allocblk == allociblk && allocib == NULL && unwindidx == -1)
return (error);		goto done;
/*		/*
* If we have failed part way through block allocation, we		* If we have failed part way through block allocation, we
* have to deallocate any indirect blocks that we have allocated.		* have to deallocate any indirect blocks that we have allocated.
* We have to fsync the file before we start to get rid of all		* We have to fsync the file before we start to get rid of all
* of its dependencies so that we do not leave them dangling.		* of its dependencies so that we do not leave them dangling.
* We have to sync it at the end so that the soft updates code		* We have to sync it at the end so that the soft updates code
* does not find any untracked changes. Although this is really		* does not find any untracked changes. Although this is really
* slow, running out of disk space is not expected to be a common		* slow, running out of disk space is not expected to be a common
▲ Show 20 Lines • Show All 71 Lines • ▼ Show 20 Lines	if (bp != NULL) {
(intmax_t)bp->b_lblkno, (uintmax_t)bp->b_blkno,		(intmax_t)bp->b_lblkno, (uintmax_t)bp->b_blkno,
(uintmax_t)fsbtodb(fs, *blkp));		(uintmax_t)fsbtodb(fs, *blkp));
}		}
lbns_remfree++;		lbns_remfree++;
#endif		#endif
ffs_blkfree(ump, fs, ump->um_devvp, *blkp, fs->fs_bsize,		ffs_blkfree(ump, fs, ump->um_devvp, *blkp, fs->fs_bsize,
ip->i_number, vp->v_type, NULL, SINGLETON_KEY);		ip->i_number, vp->v_type, NULL, SINGLETON_KEY);
}		}
		done:
		vn_seqc_write_end(vp);
return (error);		return (error);
}		}