Add in SunOS 4.1.x compatible mode for UFS

Add in support for SunOS 4.1.x flavor of BSD 4.2 UFS filing system Macros have
been put in to alow suport for the old static table Cylinder Groups but this
implementation does not use them yet.

This also fixes Solaris UFS filing system access by disabling fast symbolic
links as Sun's version of UFS does not support on-disk fast symbolic links.

Tested by:
  Ppartitioning a new disk using SunOS 4.1.1, creating a UFS filing system on
  one of the partitions and writing some files to the filing system.
  Using Linux-2.6.22 (patched) to read the files and then write a shed load of
  files to the UFS partition.
  Using SunOS 4.1.1 to verify the filing system is OK and to check the files.
The test host is a sun4c SS1 Clone.

[akpm@linux-foundation.org: coding style fixes]
[adobriyan@gmail.com: fix oops]
Signed-off-by: Mark Fortescue <mark@mtfhpc.demon.co.uk>
Cc: Evgeniy Dushistov <dushistov@mail.ru>
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 72 insertions, 19 deletions

diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index c5bdea7c23a..87f6b51a895 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -286,7 +286,7 @@ void ufs_warning (struct super_block * sb, const char * function,
 }
 
 enum {
-	Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd,
+	Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_sunos, Opt_type_44bsd,
 	Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep,
 	Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock,
 	Opt_onerror_umount, Opt_onerror_repair, Opt_err
@@ -296,6 +296,7 @@ static match_table_t tokens = {
 	{Opt_type_old, "ufstype=old"},
 	{Opt_type_sunx86, "ufstype=sunx86"},
 	{Opt_type_sun, "ufstype=sun"},
+	{Opt_type_sunos, "ufstype=sunos"},
 	{Opt_type_44bsd, "ufstype=44bsd"},
 	{Opt_type_ufs2, "ufstype=ufs2"},
 	{Opt_type_ufs2, "ufstype=5xbsd"},
@@ -339,6 +340,10 @@ static int ufs_parse_options (char * options, unsigned * mount_options)
 			ufs_clear_opt (*mount_options, UFSTYPE);
 			ufs_set_opt (*mount_options, UFSTYPE_SUN);
 			break;
+		case Opt_type_sunos:
+			ufs_clear_opt(*mount_options, UFSTYPE);
+			ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
+			break;
 		case Opt_type_44bsd:
 			ufs_clear_opt (*mount_options, UFSTYPE);
 			ufs_set_opt (*mount_options, UFSTYPE_44BSD);
@@ -654,8 +659,8 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 		ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 	}
 
-	sbi->s_uspi = uspi =
-		kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
+	uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
+	sbi->s_uspi = uspi;
 	if (!uspi)
 		goto failed;
 	uspi->s_dirblksize = UFS_SECTOR_SIZE;
@@ -692,10 +697,22 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 		uspi->s_fshift = 10;
 		uspi->s_sbsize = super_block_size = 2048;
 		uspi->s_sbbase = 0;
-		uspi->s_maxsymlinklen = 56;
+		uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 		flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 		break;
 
+	case UFS_MOUNT_UFSTYPE_SUNOS:
+		UFSD(("ufstype=sunos\n"))
+		uspi->s_fsize = block_size = 1024;
+		uspi->s_fmask = ~(1024 - 1);
+		uspi->s_fshift = 10;
+		uspi->s_sbsize = 2048;
+		super_block_size = 2048;
+		uspi->s_sbbase = 0;
+		uspi->s_maxsymlinklen = 0; /* Not supported on disk */
+		flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
+		break;
+
 	case UFS_MOUNT_UFSTYPE_SUNx86:
 		UFSD("ufstype=sunx86\n");
 		uspi->s_fsize = block_size = 1024;
@@ -703,7 +720,7 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 		uspi->s_fshift = 10;
 		uspi->s_sbsize = super_block_size = 2048;
 		uspi->s_sbbase = 0;
-		uspi->s_maxsymlinklen = 56;
+		uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 		flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 		break;
 
@@ -805,11 +822,18 @@ again:
 	if (!ubh) 
             goto failed;
 
-	
 	usb1 = ubh_get_usb_first(uspi);
 	usb2 = ubh_get_usb_second(uspi);
 	usb3 = ubh_get_usb_third(uspi);
 
+	/* Sort out mod used on SunOS 4.1.3 for fs_state */
+	uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
+	if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
+	    (uspi->s_postblformat != UFS_42POSTBLFMT)) {
+		flags &= ~UFS_ST_MASK;
+		flags |=  UFS_ST_SUN;
+	}
+
 	/*
 	 * Check ufs magic number
 	 */
@@ -904,6 +928,7 @@ magic_found:
 	if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
 	  ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
 	  (((flags & UFS_ST_MASK) == UFS_ST_SUN || 
+	    (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
 	  (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 
 	  (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
 		switch(usb1->fs_clean) {
@@ -995,7 +1020,6 @@ magic_found:
 	uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
 	uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
 	uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
-	uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
 	uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
 	uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
 	uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
@@ -1077,6 +1101,7 @@ static void ufs_write_super(struct super_block *sb)
 	if (!(sb->s_flags & MS_RDONLY)) {
 		usb1->fs_time = cpu_to_fs32(sb, get_seconds());
 		if ((flags & UFS_ST_MASK) == UFS_ST_SUN 
+		  || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
 		  || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
 			ufs_set_fs_state(sb, usb1, usb3,
 					UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
@@ -1146,6 +1171,7 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
 		ufs_put_super_internal(sb);
 		usb1->fs_time = cpu_to_fs32(sb, get_seconds());
 		if ((flags & UFS_ST_MASK) == UFS_ST_SUN
+		  || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
 		  || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 
 			ufs_set_fs_state(sb, usb1, usb3,
 				UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
@@ -1162,6 +1188,7 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
 		return -EINVAL;
 #else
 		if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 
+		    ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
 		    ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
 		    ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
 		    ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
diff --git a/fs/ufs/util.h b/fs/ufs/util.h
index 79a340a1909..b26fc4dec1e 100644
--- a/fs/ufs/util.h
+++ b/fs/ufs/util.h
@@ -38,6 +38,10 @@ ufs_get_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
 		 struct ufs_super_block_third *usb3)
 {
 	switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
+	case UFS_ST_SUNOS:
+		if (fs32_to_cpu(sb, usb3->fs_postblformat) == UFS_42POSTBLFMT)
+			return fs32_to_cpu(sb, usb1->fs_u0.fs_sun.fs_state);
+		/* Fall Through to UFS_ST_SUN */
 	case UFS_ST_SUN:
 		return fs32_to_cpu(sb, usb3->fs_un2.fs_sun.fs_state);
 	case UFS_ST_SUNx86:
@@ -53,6 +57,12 @@ ufs_set_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
 		 struct ufs_super_block_third *usb3, s32 value)
 {
 	switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
+	case UFS_ST_SUNOS:
+		if (fs32_to_cpu(sb, usb3->fs_postblformat == UFS_42POSTBLFMT)) {
+			usb1->fs_u0.fs_sun.fs_state = cpu_to_fs32(sb, value);
+			break;
+		}
+		/* Fall Through to UFS_ST_SUN */
 	case UFS_ST_SUN:
 		usb3->fs_un2.fs_sun.fs_state = cpu_to_fs32(sb, value);
 		break;
@@ -81,6 +91,7 @@ ufs_get_fs_qbmask(struct super_block *sb, struct ufs_super_block_third *usb3)
 	__fs64 tmp;
 
 	switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
+	case UFS_ST_SUNOS:
 	case UFS_ST_SUN:
 		((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qbmask[0];
 		((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qbmask[1];
@@ -104,6 +115,7 @@ ufs_get_fs_qfmask(struct super_block *sb, struct ufs_super_block_third *usb3)
 	__fs64 tmp;
 
 	switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
+	case UFS_ST_SUNOS:
 	case UFS_ST_SUN:
 		((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qfmask[0];
 		((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qfmask[1];
@@ -179,10 +191,12 @@ static inline u32
 ufs_get_inode_uid(struct super_block *sb, struct ufs_inode *inode)
 {
 	switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
-	case UFS_UID_EFT:
-		return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_uid);
 	case UFS_UID_44BSD:
 		return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_uid);
+	case UFS_UID_EFT:
+		if (inode->ui_u1.oldids.ui_suid == 0xFFFF)
+			return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_uid);
+		/* Fall through */
 	default:
 		return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_suid);
 	}
@@ -192,24 +206,31 @@ static inline void
 ufs_set_inode_uid(struct super_block *sb, struct ufs_inode *inode, u32 value)
 {
 	switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
-	case UFS_UID_EFT:
-		inode->ui_u3.ui_sun.ui_uid = cpu_to_fs32(sb, value);
-		break;
 	case UFS_UID_44BSD:
 		inode->ui_u3.ui_44.ui_uid = cpu_to_fs32(sb, value);
+		inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
+		break;
+	case UFS_UID_EFT:
+		inode->ui_u3.ui_sun.ui_uid = cpu_to_fs32(sb, value);
+		if (value > 0xFFFF)
+			value = 0xFFFF;
+		/* Fall through */
+	default:
+		inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
 		break;
 	}
-	inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value); 
 }
 
 static inline u32
 ufs_get_inode_gid(struct super_block *sb, struct ufs_inode *inode)
 {
 	switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
-	case UFS_UID_EFT:
-		return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_gid);
 	case UFS_UID_44BSD:
 		return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_gid);
+	case UFS_UID_EFT:
+		if (inode->ui_u1.oldids.ui_suid == 0xFFFF)
+			return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_gid);
+		/* Fall through */
 	default:
 		return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_sgid);
 	}
@@ -219,14 +240,19 @@ static inline void
 ufs_set_inode_gid(struct super_block *sb, struct ufs_inode *inode, u32 value)
 {
 	switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
-	case UFS_UID_EFT:
-		inode->ui_u3.ui_sun.ui_gid = cpu_to_fs32(sb, value);
-		break;
 	case UFS_UID_44BSD:
 		inode->ui_u3.ui_44.ui_gid = cpu_to_fs32(sb, value);
+		inode->ui_u1.oldids.ui_sgid =  cpu_to_fs16(sb, value);
+		break;
+	case UFS_UID_EFT:
+		inode->ui_u3.ui_sun.ui_gid = cpu_to_fs32(sb, value);
+		if (value > 0xFFFF)
+			value = 0xFFFF;
+		/* Fall through */
+	default:
+		inode->ui_u1.oldids.ui_sgid =  cpu_to_fs16(sb, value);
 		break;
 	}
-	inode->ui_u1.oldids.ui_sgid =  cpu_to_fs16(sb, value);
 }
 
 extern dev_t ufs_get_inode_dev(struct super_block *, struct ufs_inode_info *);