- Merge soft-updates journaling from projects/suj/head into head. This

   brings in support for an optional intent log which eliminates the need
   for background fsck on unclean shutdown.

Sponsored by:   iXsystems, Yahoo!, and Juniper.
With help from: McKusick and Peter Holm

1 files changed, 138 insertions, 2 deletions

diff --git a/lib/libufs/cgroup.c b/lib/libufs/cgroup.c
index 28e5ea87a430..b0cb4a7d63db 100644
--- a/lib/libufs/cgroup.c
+++ b/lib/libufs/cgroup.c
@@ -40,11 +40,143 @@ __FBSDID("$FreeBSD$");
 #include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
 #include <libufs.h>
 
+ufs2_daddr_t
+cgballoc(struct uufsd *disk)
+{
+	u_int8_t *blksfree;
+	struct cg *cgp;
+	struct fs *fs;
+	long bno;
+
+	fs = &disk->d_fs;
+	cgp = &disk->d_cg;
+	blksfree = cg_blksfree(cgp);
+	for (bno = 0; bno < fs->fs_fpg / fs->fs_frag; bno++)
+		if (ffs_isblock(fs, blksfree, bno))
+			goto gotit;
+	return (0);
+gotit:
+	fs->fs_cs(fs, cgp->cg_cgx).cs_nbfree--;
+	ffs_clrblock(fs, blksfree, (long)bno);
+	ffs_clusteracct(fs, cgp, bno, -1);
+	cgp->cg_cs.cs_nbfree--;
+	fs->fs_cstotal.cs_nbfree--;
+	fs->fs_fmod = 1;
+	return (cgbase(fs, cgp->cg_cgx) + blkstofrags(fs, bno));
+}
+
+int
+cgbfree(struct uufsd *disk, ufs2_daddr_t bno, long size)
+{
+	u_int8_t *blksfree;
+	struct fs *fs;
+	struct cg *cgp;
+	ufs1_daddr_t fragno, cgbno;
+	int i, cg, blk, frags, bbase;
+
+	fs = &disk->d_fs;
+	cg = dtog(fs, bno);
+	if (cgread1(disk, cg) != 1)
+		return (-1);
+	cgp = &disk->d_cg;
+	cgbno = dtogd(fs, bno);
+	blksfree = cg_blksfree(cgp);
+	if (size == fs->fs_bsize) {
+		fragno = fragstoblks(fs, cgbno);
+		ffs_setblock(fs, blksfree, fragno);
+		ffs_clusteracct(fs, cgp, fragno, 1);
+		cgp->cg_cs.cs_nbfree++;
+		fs->fs_cstotal.cs_nbfree++;
+		fs->fs_cs(fs, cg).cs_nbfree++;
+	} else {
+		bbase = cgbno - fragnum(fs, cgbno);
+		/*
+		 * decrement the counts associated with the old frags
+		 */
+		blk = blkmap(fs, blksfree, bbase);
+		ffs_fragacct(fs, blk, cgp->cg_frsum, -1);
+		/*
+		 * deallocate the fragment
+		 */
+		frags = numfrags(fs, size);
+		for (i = 0; i < frags; i++)
+			setbit(blksfree, cgbno + i);
+		cgp->cg_cs.cs_nffree += i;
+		fs->fs_cstotal.cs_nffree += i;
+		fs->fs_cs(fs, cg).cs_nffree += i;
+		/*
+		 * add back in counts associated with the new frags
+		 */
+		blk = blkmap(fs, blksfree, bbase);
+		ffs_fragacct(fs, blk, cgp->cg_frsum, 1);
+		/*
+		 * if a complete block has been reassembled, account for it
+		 */
+		fragno = fragstoblks(fs, bbase);
+		if (ffs_isblock(fs, blksfree, fragno)) {
+			cgp->cg_cs.cs_nffree -= fs->fs_frag;
+			fs->fs_cstotal.cs_nffree -= fs->fs_frag;
+			fs->fs_cs(fs, cg).cs_nffree -= fs->fs_frag;
+			ffs_clusteracct(fs, cgp, fragno, 1);
+			cgp->cg_cs.cs_nbfree++;
+			fs->fs_cstotal.cs_nbfree++;
+			fs->fs_cs(fs, cg).cs_nbfree++;
+		}
+	}
+	return cgwrite(disk);
+}
+
+ino_t
+cgialloc(struct uufsd *disk)
+{
+	struct ufs2_dinode *dp2;
+	u_int8_t *inosused;
+	struct cg *cgp;
+	struct fs *fs;
+	ino_t ino;
+	int i;
+
+	fs = &disk->d_fs;
+	cgp = &disk->d_cg;
+	inosused = cg_inosused(cgp);
+	for (ino = 0; ino < fs->fs_ipg / NBBY; ino++)
+		if (isclr(inosused, ino))
+			goto gotit;
+	return (0);
+gotit:
+	if (fs->fs_magic == FS_UFS2_MAGIC &&
+	    ino + INOPB(fs) > cgp->cg_initediblk &&
+	    cgp->cg_initediblk < cgp->cg_niblk) {
+		char block[MAXBSIZE];
+		bzero(block, (int)fs->fs_bsize);
+		dp2 = (struct ufs2_dinode *)&block;
+		for (i = 0; i < INOPB(fs); i++) {
+			dp2->di_gen = arc4random() / 2 + 1;
+			dp2++;
+		}
+		if (bwrite(disk, ino_to_fsba(fs,
+		    cgp->cg_cgx * fs->fs_ipg + cgp->cg_initediblk),
+		    block, fs->fs_bsize))
+			return (0);
+		cgp->cg_initediblk += INOPB(fs);
+	}
+
+	setbit(inosused, ino);
+	cgp->cg_irotor = ino;
+	cgp->cg_cs.cs_nifree--;
+	fs->fs_cstotal.cs_nifree--;
+	fs->fs_cs(fs, cgp->cg_cgx).cs_nifree--;
+	fs->fs_fmod = 1;
+
+	return (ino + (cgp->cg_cgx * fs->fs_ipg));
+}
+
 int
 cgread(struct uufsd *disk)
 {
@@ -55,14 +187,12 @@ int
 cgread1(struct uufsd *disk, int c)
 {
 	struct fs *fs;
-	off_t ccg;
 
 	fs = &disk->d_fs;
 
 	if ((unsigned)c >= fs->fs_ncg) {
 		return (0);
 	}
-	ccg = fsbtodb(fs, cgtod(fs, c)) * disk->d_bsize;
 	if (bread(disk, fsbtodb(fs, cgtod(fs, c)), disk->d_cgunion.d_buf,
 	    fs->fs_bsize) == -1) {
 		ERROR(disk, "unable to read cylinder group");
@@ -73,6 +203,12 @@ cgread1(struct uufsd *disk, int c)
 }
 
 int
+cgwrite(struct uufsd *disk)
+{
+	return (cgwrite1(disk, disk->d_lcg));
+}
+
+int
 cgwrite1(struct uufsd *disk, int c)
 {
 	struct fs *fs;