This commit adds basic support for the UFS2 filesystem. The UFS2

filesystem expands the inode to 256 bytes to make space for 64-bit
block pointers. It also adds a file-creation time field, an ability
to use jumbo blocks per inode to allow extent like pointer density,
and space for extended attributes (up to twice the filesystem block
size worth of attributes, e.g., on a 16K filesystem, there is space
for 32K of attributes). UFS2 fully supports and runs existing UFS1
filesystems. New filesystems built using newfs can be built in either
UFS1 or UFS2 format using the -O option. In this commit UFS1 is
the default format, so if you want to build UFS2 format filesystems,
you must specify -O 2. This default will be changed to UFS2 when
UFS2 proves itself to be stable. In this commit the boot code for
reading UFS2 filesystems is not compiled (see /sys/boot/common/ufsread.c)
as there is insufficient space in the boot block. Once the size of the
boot block is increased, this code can be defined.

Things to note: the definition of SBSIZE has changed to SBLOCKSIZE.
The header file <ufs/ufs/dinode.h> must be included before
<ufs/ffs/fs.h> so as to get the definitions of ufs2_daddr_t and
ufs_lbn_t.

Still TODO:
Verify that the first level bootstraps work for all the architectures.
Convert the utility ffsinfo to understand UFS2 and test growfs.
Add support for the extended attribute storage. Update soft updates
to ensure integrity of extended attribute storage. Switch the
current extended attribute interfaces to use the extended attribute
storage. Add the extent like functionality (framework is there,
but is currently never used).

Sponsored by: DARPA & NAI Labs.
Reviewed by:	Poul-Henning Kamp <phk@freebsd.org>

1 files changed, 70 insertions, 47 deletions

diff --git a/sbin/fsirand/fsirand.c b/sbin/fsirand/fsirand.c
index e908f2a..2e555be 100644
--- a/sbin/fsirand/fsirand.c
+++ b/sbin/fsirand/fsirand.c
@@ -40,8 +40,8 @@ static const char rcsid[] =
 #include <sys/time.h>
 #include <sys/resource.h>
 
-#include <ufs/ffs/fs.h>
 #include <ufs/ufs/dinode.h>
+#include <ufs/ffs/fs.h>
 
 #include <err.h>
 #include <errno.h>
@@ -54,6 +54,11 @@ static const char rcsid[] =
 static void usage(void) __dead2;
 int fsirand(char *);
 
+/*
+ * Possible superblock locations ordered from most to least likely.
+ */
+static int sblock_try[] = SBLOCKSEARCH;
+
 int printonly = 0, force = 0, ignorelabel = 0;
 
 int
@@ -104,14 +109,15 @@ main(int argc, char *argv[])
 int
 fsirand(char *device)
 {
-	static struct dinode *inodebuf;
-	static size_t oldibufsize;
+	struct ufs1_dinode *dp1;
+	struct ufs2_dinode *dp2;
+	caddr_t inodebuf;
 	size_t ibufsize;
 	struct fs *sblock;
 	ino_t inumber, maxino;
-	daddr_t dblk;
-	char sbuf[SBSIZE], sbuftmp[SBSIZE];
-	int devfd, n, cg;
+	ufs2_daddr_t sblockloc, dblk;
+	char sbuf[SBLOCKSIZE], sbuftmp[SBLOCKSIZE];
+	int i, devfd, n, cg;
 	u_int32_t bsize = DEV_BSIZE;
 	struct disklabel label;
 
@@ -132,27 +138,34 @@ fsirand(char *device)
 	/* Read in master superblock */
 	(void)memset(&sbuf, 0, sizeof(sbuf));
 	sblock = (struct fs *)&sbuf;
-	if (lseek(devfd, SBOFF, SEEK_SET) == -1) {
-		warn("can't seek to superblock (%qd) on %s", SBOFF, device);
-		return (1);
+	for (i = 0; sblock_try[i] != -1; i++) {
+		sblockloc = sblock_try[i];
+		if (lseek(devfd, sblockloc, SEEK_SET) == -1) {
+			warn("can't seek to superblock (%qd) on %s",
+			    sblockloc, device);
+			return (1);
+		}
+		if ((n = read(devfd, (void *)sblock, SBLOCKSIZE))!=SBLOCKSIZE) {
+			warnx("can't read superblock on %s: %s", device,
+			    (n < SBLOCKSIZE) ? "short read" : strerror(errno));
+			return (1);
+		}
+		if ((sblock->fs_magic == FS_UFS1_MAGIC ||
+		     (sblock->fs_magic == FS_UFS2_MAGIC &&
+		      sblock->fs_sblockloc ==
+			  numfrags(sblock, sblock_try[i]))) &&
+		    sblock->fs_bsize <= MAXBSIZE &&
+		    sblock->fs_bsize >= sizeof(struct fs))
+			break;
 	}
-	if ((n = read(devfd, (void *)sblock, SBSIZE)) != SBSIZE) {
-		warnx("can't read superblock on %s: %s", device,
-		    (n < SBSIZE) ? "short read" : strerror(errno));
+	if (sblock_try[i] == -1) {
+		fprintf(stderr, "Cannot find filesystem superblock\n");
 		return (1);
 	}
 	maxino = sblock->fs_ncg * sblock->fs_ipg;
 
-	/* Simple sanity checks on the superblock */
-	if (sblock->fs_magic != FS_MAGIC) {
-		warnx("bad magic number in superblock");
-		return (1);
-	}
-	if (sblock->fs_sbsize > SBSIZE) {
-		warnx("superblock size is preposterous");
-		return (1);
-	}
-	if (sblock->fs_postblformat == FS_42POSTBLFMT) {
+	if (sblock->fs_magic == FS_UFS1_MAGIC &&
+	    sblock->fs_old_inodefmt < FS_44INODEFMT) {
 		warnx("filesystem format is too old, sorry");
 		return (1);
 	}
@@ -168,18 +181,19 @@ fsirand(char *device)
 		if (lseek(devfd, (off_t)dblk * bsize, SEEK_SET) < 0) {
 			warn("can't seek to %qd", (off_t)dblk * bsize);
 			return (1);
-		} else if ((n = write(devfd, (void *)sblock, SBSIZE)) != SBSIZE) {
+		} else if ((n = write(devfd, (void *)sblock, SBLOCKSIZE)) != SBLOCKSIZE) {
 			warn("can't read backup superblock %d on %s: %s",
-			    cg + 1, device, (n < SBSIZE) ? "short write"
+			    cg + 1, device, (n < SBLOCKSIZE) ? "short write"
 			    : strerror(errno));
 			return (1);
 		}
-		if (sblock->fs_magic != FS_MAGIC) {
+		if (sblock->fs_magic != FS_UFS1_MAGIC &&
+		    sblock->fs_magic != FS_UFS2_MAGIC) {
 			warnx("bad magic number in backup superblock %d on %s",
 			    cg + 1, device);
 			return (1);
 		}
-		if (sblock->fs_sbsize > SBSIZE) {
+		if (sblock->fs_sbsize > SBLOCKSIZE) {
 			warnx("size of backup superblock %d on %s is preposterous",
 			    cg + 1, device);
 			return (1);
@@ -188,15 +202,15 @@ fsirand(char *device)
 	sblock = (struct fs *)&sbuf;
 
 	/* XXX - should really cap buffer at 512kb or so */
-	ibufsize = sizeof(struct dinode) * sblock->fs_ipg;
-	if (oldibufsize < ibufsize) {
-		if ((inodebuf = realloc(inodebuf, ibufsize)) == NULL)
-			errx(1, "can't allocate memory for inode buffer");
-		oldibufsize = ibufsize;
-	}
+	if (sblock->fs_magic == FS_UFS1_MAGIC)
+		ibufsize = sizeof(struct ufs1_dinode) * sblock->fs_ipg;
+	else
+		ibufsize = sizeof(struct ufs2_dinode) * sblock->fs_ipg;
+	if ((inodebuf = malloc(ibufsize)) == NULL)
+		errx(1, "can't allocate memory for inode buffer");
 
 	if (printonly && (sblock->fs_id[0] || sblock->fs_id[1])) {
-		if (sblock->fs_inodefmt >= FS_44INODEFMT && sblock->fs_id[0])
+		if (sblock->fs_id[0])
 			(void)printf("%s was randomized on %s", device,
 			    ctime((const time_t *)&(sblock->fs_id[0])));
 		(void)printf("fsid: %x %x\n", sblock->fs_id[0],
@@ -204,19 +218,20 @@ fsirand(char *device)
 	}
 
 	/* Randomize fs_id unless old 4.2BSD filesystem */
-	if ((sblock->fs_inodefmt >= FS_44INODEFMT) && !printonly) {
+	if (!printonly) {
 		/* Randomize fs_id and write out new sblock and backups */
 		sblock->fs_id[0] = (u_int32_t)time(NULL);
 		sblock->fs_id[1] = random();
 
-		if (lseek(devfd, SBOFF, SEEK_SET) == -1) {
-			warn("can't seek to superblock (%qd) on %s", SBOFF,
+		if (lseek(devfd, sblockloc, SEEK_SET) == -1) {
+			warn("can't seek to superblock (%qd) on %s", sblockloc,
 			    device);
 			return (1);
 		}
-		if ((n = write(devfd, (void *)sblock, SBSIZE)) != SBSIZE) {
-			warn("can't read superblock on %s: %s", device,
-			    (n < SBSIZE) ? "short write" : strerror(errno));
+		if ((n = write(devfd, (void *)sblock, SBLOCKSIZE)) !=
+		    SBLOCKSIZE) {
+			warn("can't write superblock on %s: %s", device,
+			    (n < SBLOCKSIZE) ? "short write" : strerror(errno));
 			return (1);
 		}
 	}
@@ -224,15 +239,16 @@ fsirand(char *device)
 	/* For each cylinder group, randomize inodes and update backup sblock */
 	for (cg = 0, inumber = 0; cg < sblock->fs_ncg; cg++) {
 		/* Update superblock if appropriate */
-		if ((sblock->fs_inodefmt >= FS_44INODEFMT) && !printonly) {
+		if (!printonly) {
 			dblk = fsbtodb(sblock, cgsblock(sblock, cg));
 			if (lseek(devfd, (off_t)dblk * bsize, SEEK_SET) < 0) {
 				warn("can't seek to %qd", (off_t)dblk * bsize);
 				return (1);
-			} else if ((n = write(devfd, (void *)sblock, SBSIZE)) != SBSIZE) {
-				warn("can't read backup superblock %d on %s: %s",
-				    cg + 1, device, (n < SBSIZE) ? "short write"
-				    : strerror(errno));
+			} else if ((n = write(devfd, (void *)sblock,
+			    SBLOCKSIZE)) != SBLOCKSIZE) {
+			      warn("can't write backup superblock %d on %s: %s",
+				    cg + 1, device, (n < SBLOCKSIZE) ?
+				    "short write" : strerror(errno));
 				return (1);
 			}
 		}
@@ -249,12 +265,19 @@ fsirand(char *device)
 		}
 
 		for (n = 0; n < sblock->fs_ipg; n++, inumber++) {
+			if (sblock->fs_magic == FS_UFS1_MAGIC)
+				dp1 = &((struct ufs1_dinode *)inodebuf)[n];
+			else
+				dp2 = &((struct ufs2_dinode *)inodebuf)[n];
 			if (inumber >= ROOTINO) {
 				if (printonly)
-					(void)printf("ino %d gen %x\n", inumber,
-						     inodebuf[n].di_gen);
+					(void)printf("ino %d gen %qx\n",
+					    inumber,
+					    sblock->fs_magic == FS_UFS1_MAGIC ?
+					    (quad_t)dp1->di_gen : dp2->di_gen);
 				else
-					inodebuf[n].di_gen = random();
+					(sblock->fs_magic == FS_UFS1_MAGIC ?
+					dp1->di_gen : dp2->di_gen) = random();
 			}
 		}