These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

9 files changed, 683 insertions, 953 deletions

diff --git a/kernel/fs/ufs/Makefile b/kernel/fs/ufs/Makefile
index 4d0e02b02..392db25c0 100644
--- a/kernel/fs/ufs/Makefile
+++ b/kernel/fs/ufs/Makefile
@@ -5,5 +5,5 @@
 obj-$(CONFIG_UFS_FS) += ufs.o
 
 ufs-objs := balloc.o cylinder.o dir.o file.o ialloc.o inode.o \
-	    namei.o super.o symlink.o truncate.o util.o
+	    namei.o super.o symlink.o util.o
 ccflags-$(CONFIG_UFS_DEBUG)    += -DDEBUG
diff --git a/kernel/fs/ufs/balloc.c b/kernel/fs/ufs/balloc.c
index a7106eda5..dc5fae601 100644
--- a/kernel/fs/ufs/balloc.c
+++ b/kernel/fs/ufs/balloc.c
@@ -417,12 +417,14 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
 	if (oldcount == 0) {
 		result = ufs_alloc_fragments (inode, cgno, goal, count, err);
 		if (result) {
+			ufs_clear_frags(inode, result + oldcount,
+					newcount - oldcount, locked_page != NULL);
+			write_seqlock(&UFS_I(inode)->meta_lock);
 			ufs_cpu_to_data_ptr(sb, p, result);
+			write_sequnlock(&UFS_I(inode)->meta_lock);
 			*err = 0;
 			UFS_I(inode)->i_lastfrag =
 				max(UFS_I(inode)->i_lastfrag, fragment + count);
-			ufs_clear_frags(inode, result + oldcount,
-					newcount - oldcount, locked_page != NULL);
 		}
 		mutex_unlock(&UFS_SB(sb)->s_lock);
 		UFSD("EXIT, result %llu\n", (unsigned long long)result);
@@ -473,7 +475,9 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
 		ufs_change_blocknr(inode, fragment - oldcount, oldcount,
 				   uspi->s_sbbase + tmp,
 				   uspi->s_sbbase + result, locked_page);
+		write_seqlock(&UFS_I(inode)->meta_lock);
 		ufs_cpu_to_data_ptr(sb, p, result);
+		write_sequnlock(&UFS_I(inode)->meta_lock);
 		*err = 0;
 		UFS_I(inode)->i_lastfrag = max(UFS_I(inode)->i_lastfrag,
 						fragment + count);
diff --git a/kernel/fs/ufs/dir.c b/kernel/fs/ufs/dir.c
index 1bfe8cabf..74f2e8028 100644
--- a/kernel/fs/ufs/dir.c
+++ b/kernel/fs/ufs/dir.c
@@ -65,11 +65,6 @@ static inline void ufs_put_page(struct page *page)
 	page_cache_release(page);
 }
 
-static inline unsigned long ufs_dir_pages(struct inode *inode)
-{
-	return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
-}
-
 ino_t ufs_inode_by_name(struct inode *dir, const struct qstr *qstr)
 {
 	ino_t res = 0;
@@ -87,7 +82,8 @@ ino_t ufs_inode_by_name(struct inode *dir, const struct qstr *qstr)
 
 /* Releases the page */
 void ufs_set_link(struct inode *dir, struct ufs_dir_entry *de,
-		  struct page *page, struct inode *inode)
+		  struct page *page, struct inode *inode,
+		  bool update_times)
 {
 	loff_t pos = page_offset(page) +
 			(char *) de - (char *) page_address(page);
@@ -103,7 +99,8 @@ void ufs_set_link(struct inode *dir, struct ufs_dir_entry *de,
 
 	err = ufs_commit_chunk(page, pos, len);
 	ufs_put_page(page);
-	dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
+	if (update_times)
+		dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
 	mark_inode_dirty(dir);
 }
 
@@ -256,7 +253,7 @@ struct ufs_dir_entry *ufs_find_entry(struct inode *dir, const struct qstr *qstr,
 	int namelen = qstr->len;
 	unsigned reclen = UFS_DIR_REC_LEN(namelen);
 	unsigned long start, n;
-	unsigned long npages = ufs_dir_pages(dir);
+	unsigned long npages = dir_pages(dir);
 	struct page *page = NULL;
 	struct ufs_inode_info *ui = UFS_I(dir);
 	struct ufs_dir_entry *de;
@@ -320,7 +317,7 @@ int ufs_add_link(struct dentry *dentry, struct inode *inode)
 	unsigned short rec_len, name_len;
 	struct page *page = NULL;
 	struct ufs_dir_entry *de;
-	unsigned long npages = ufs_dir_pages(dir);
+	unsigned long npages = dir_pages(dir);
 	unsigned long n;
 	char *kaddr;
 	loff_t pos;
@@ -437,7 +434,7 @@ ufs_readdir(struct file *file, struct dir_context *ctx)
 	struct super_block *sb = inode->i_sb;
 	unsigned int offset = pos & ~PAGE_CACHE_MASK;
 	unsigned long n = pos >> PAGE_CACHE_SHIFT;
-	unsigned long npages = ufs_dir_pages(inode);
+	unsigned long npages = dir_pages(inode);
 	unsigned chunk_mask = ~(UFS_SB(sb)->s_uspi->s_dirblksize - 1);
 	int need_revalidate = file->f_version != inode->i_version;
 	unsigned flags = UFS_SB(sb)->s_flags;
@@ -608,7 +605,7 @@ int ufs_empty_dir(struct inode * inode)
 {
 	struct super_block *sb = inode->i_sb;
 	struct page *page = NULL;
-	unsigned long i, npages = ufs_dir_pages(inode);
+	unsigned long i, npages = dir_pages(inode);
 
 	for (i = 0; i < npages; i++) {
 		char *kaddr;
diff --git a/kernel/fs/ufs/inode.c b/kernel/fs/ufs/inode.c
index 2d93ab07d..a064cf44b 100644
--- a/kernel/fs/ufs/inode.c
+++ b/kernel/fs/ufs/inode.c
@@ -41,9 +41,7 @@
 #include "swab.h"
 #include "util.h"
 
-static u64 ufs_frag_map(struct inode *inode, sector_t frag, bool needs_lock);
-
-static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t offsets[4])
+static int ufs_block_to_path(struct inode *inode, sector_t i_block, unsigned offsets[4])
 {
 	struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi;
 	int ptrs = uspi->s_apb;
@@ -75,227 +73,232 @@ static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t off
 	return n;
 }
 
+typedef struct {
+	void	*p;
+	union {
+		__fs32	key32;
+		__fs64	key64;
+	};
+	struct buffer_head *bh;
+} Indirect;
+
+static inline int grow_chain32(struct ufs_inode_info *ufsi,
+			       struct buffer_head *bh, __fs32 *v,
+			       Indirect *from, Indirect *to)
+{
+	Indirect *p;
+	unsigned seq;
+	to->bh = bh;
+	do {
+		seq = read_seqbegin(&ufsi->meta_lock);
+		to->key32 = *(__fs32 *)(to->p = v);
+		for (p = from; p <= to && p->key32 == *(__fs32 *)p->p; p++)
+			;
+	} while (read_seqretry(&ufsi->meta_lock, seq));
+	return (p > to);
+}
+
+static inline int grow_chain64(struct ufs_inode_info *ufsi,
+			       struct buffer_head *bh, __fs64 *v,
+			       Indirect *from, Indirect *to)
+{
+	Indirect *p;
+	unsigned seq;
+	to->bh = bh;
+	do {
+		seq = read_seqbegin(&ufsi->meta_lock);
+		to->key64 = *(__fs64 *)(to->p = v);
+		for (p = from; p <= to && p->key64 == *(__fs64 *)p->p; p++)
+			;
+	} while (read_seqretry(&ufsi->meta_lock, seq));
+	return (p > to);
+}
+
 /*
  * Returns the location of the fragment from
  * the beginning of the filesystem.
  */
 
-static u64 ufs_frag_map(struct inode *inode, sector_t frag, bool needs_lock)
+static u64 ufs_frag_map(struct inode *inode, unsigned offsets[4], int depth)
 {
 	struct ufs_inode_info *ufsi = UFS_I(inode);
 	struct super_block *sb = inode->i_sb;
 	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 	u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift;
 	int shift = uspi->s_apbshift-uspi->s_fpbshift;
-	sector_t offsets[4], *p;
-	int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets);
-	u64  ret = 0L;
-	__fs32 block;
-	__fs64 u2_block = 0L;
+	Indirect chain[4], *q = chain;
+	unsigned *p;
 	unsigned flags = UFS_SB(sb)->s_flags;
-	u64 temp = 0L;
+	u64 res = 0;
 
-	UFSD(": frag = %llu  depth = %d\n", (unsigned long long)frag, depth);
 	UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n",
 		uspi->s_fpbshift, uspi->s_apbmask,
 		(unsigned long long)mask);
 
 	if (depth == 0)
-		return 0;
+		goto no_block;
 
+again:
 	p = offsets;
 
-	if (needs_lock)
-		lock_ufs(sb);
 	if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 		goto ufs2;
 
-	block = ufsi->i_u1.i_data[*p++];
-	if (!block)
-		goto out;
+	if (!grow_chain32(ufsi, NULL, &ufsi->i_u1.i_data[*p++], chain, q))
+		goto changed;
+	if (!q->key32)
+		goto no_block;
 	while (--depth) {
+		__fs32 *ptr;
 		struct buffer_head *bh;
-		sector_t n = *p++;
+		unsigned n = *p++;
 
-		bh = sb_bread(sb, uspi->s_sbbase + fs32_to_cpu(sb, block)+(n>>shift));
+		bh = sb_bread(sb, uspi->s_sbbase +
+				  fs32_to_cpu(sb, q->key32) + (n>>shift));
 		if (!bh)
-			goto out;
-		block = ((__fs32 *) bh->b_data)[n & mask];
-		brelse (bh);
-		if (!block)
-			goto out;
-	}
-	ret = (u64) (uspi->s_sbbase + fs32_to_cpu(sb, block) + (frag & uspi->s_fpbmask));
-	goto out;
-ufs2:
-	u2_block = ufsi->i_u1.u2_i_data[*p++];
-	if (!u2_block)
-		goto out;
+			goto no_block;
+		ptr = (__fs32 *)bh->b_data + (n & mask);
+		if (!grow_chain32(ufsi, bh, ptr, chain, ++q))
+			goto changed;
+		if (!q->key32)
+			goto no_block;
+	}
+	res = fs32_to_cpu(sb, q->key32);
+	goto found;
 
+ufs2:
+	if (!grow_chain64(ufsi, NULL, &ufsi->i_u1.u2_i_data[*p++], chain, q))
+		goto changed;
+	if (!q->key64)
+		goto no_block;
 
 	while (--depth) {
+		__fs64 *ptr;
 		struct buffer_head *bh;
-		sector_t n = *p++;
-
+		unsigned n = *p++;
 
-		temp = (u64)(uspi->s_sbbase) + fs64_to_cpu(sb, u2_block);
-		bh = sb_bread(sb, temp +(u64) (n>>shift));
+		bh = sb_bread(sb, uspi->s_sbbase +
+				  fs64_to_cpu(sb, q->key64) + (n>>shift));
 		if (!bh)
-			goto out;
-		u2_block = ((__fs64 *)bh->b_data)[n & mask];
-		brelse(bh);
-		if (!u2_block)
-			goto out;
+			goto no_block;
+		ptr = (__fs64 *)bh->b_data + (n & mask);
+		if (!grow_chain64(ufsi, bh, ptr, chain, ++q))
+			goto changed;
+		if (!q->key64)
+			goto no_block;
+	}
+	res = fs64_to_cpu(sb, q->key64);
+found:
+	res += uspi->s_sbbase;
+no_block:
+	while (q > chain) {
+		brelse(q->bh);
+		q--;
 	}
-	temp = (u64)uspi->s_sbbase + fs64_to_cpu(sb, u2_block);
-	ret = temp + (u64) (frag & uspi->s_fpbmask);
+	return res;
 
-out:
-	if (needs_lock)
-		unlock_ufs(sb);
-	return ret;
+changed:
+	while (q > chain) {
+		brelse(q->bh);
+		q--;
+	}
+	goto again;
+}
+
+/*
+ * Unpacking tails: we have a file with partial final block and
+ * we had been asked to extend it.  If the fragment being written
+ * is within the same block, we need to extend the tail just to cover
+ * that fragment.  Otherwise the tail is extended to full block.
+ *
+ * Note that we might need to create a _new_ tail, but that will
+ * be handled elsewhere; this is strictly for resizing old
+ * ones.
+ */
+static bool
+ufs_extend_tail(struct inode *inode, u64 writes_to,
+		  int *err, struct page *locked_page)
+{
+	struct ufs_inode_info *ufsi = UFS_I(inode);
+	struct super_block *sb = inode->i_sb;
+	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+	unsigned lastfrag = ufsi->i_lastfrag;	/* it's a short file, so unsigned is enough */
+	unsigned block = ufs_fragstoblks(lastfrag);
+	unsigned new_size;
+	void *p;
+	u64 tmp;
+
+	if (writes_to < (lastfrag | uspi->s_fpbmask))
+		new_size = (writes_to & uspi->s_fpbmask) + 1;
+	else
+		new_size = uspi->s_fpb;
+
+	p = ufs_get_direct_data_ptr(uspi, ufsi, block);
+	tmp = ufs_new_fragments(inode, p, lastfrag, ufs_data_ptr_to_cpu(sb, p),
+				new_size, err, locked_page);
+	return tmp != 0;
 }
 
 /**
  * ufs_inode_getfrag() - allocate new fragment(s)
  * @inode: pointer to inode
- * @fragment: number of `fragment' which hold pointer
- *   to new allocated fragment(s)
+ * @index: number of block pointer within the inode's array.
  * @new_fragment: number of new allocated fragment(s)
- * @required: how many fragment(s) we require
  * @err: we set it if something wrong
- * @phys: pointer to where we save physical number of new allocated fragments,
- *   NULL if we allocate not data(indirect blocks for example).
  * @new: we set it if we allocate new block
  * @locked_page: for ufs_new_fragments()
  */
-static struct buffer_head *
-ufs_inode_getfrag(struct inode *inode, u64 fragment,
-		  sector_t new_fragment, unsigned int required, int *err,
-		  long *phys, int *new, struct page *locked_page)
+static u64
+ufs_inode_getfrag(struct inode *inode, unsigned index,
+		  sector_t new_fragment, int *err,
+		  int *new, struct page *locked_page)
 {
 	struct ufs_inode_info *ufsi = UFS_I(inode);
 	struct super_block *sb = inode->i_sb;
 	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
-	struct buffer_head * result;
-	unsigned blockoff, lastblockoff;
-	u64 tmp, goal, lastfrag, block, lastblock;
-	void *p, *p2;
-
-	UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, required %u, "
-	     "metadata %d\n", inode->i_ino, (unsigned long long)fragment,
-	     (unsigned long long)new_fragment, required, !phys);
+	u64 tmp, goal, lastfrag;
+	unsigned nfrags = uspi->s_fpb;
+	void *p;
 
         /* TODO : to be done for write support
         if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
              goto ufs2;
          */
 
-	block = ufs_fragstoblks (fragment);
-	blockoff = ufs_fragnum (fragment);
-	p = ufs_get_direct_data_ptr(uspi, ufsi, block);
-
-	goal = 0;
-
-repeat:
+	p = ufs_get_direct_data_ptr(uspi, ufsi, index);
 	tmp = ufs_data_ptr_to_cpu(sb, p);
+	if (tmp)
+		goto out;
 
 	lastfrag = ufsi->i_lastfrag;
-	if (tmp && fragment < lastfrag) {
-		if (!phys) {
-			result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
-			if (tmp == ufs_data_ptr_to_cpu(sb, p)) {
-				UFSD("EXIT, result %llu\n",
-				     (unsigned long long)tmp + blockoff);
-				return result;
-			}
-			brelse (result);
-			goto repeat;
-		} else {
-			*phys = uspi->s_sbbase + tmp + blockoff;
-			return NULL;
-		}
-	}
 
-	lastblock = ufs_fragstoblks (lastfrag);
-	lastblockoff = ufs_fragnum (lastfrag);
-	/*
-	 * We will extend file into new block beyond last allocated block
-	 */
-	if (lastblock < block) {
-		/*
-		 * We must reallocate last allocated block
-		 */
-		if (lastblockoff) {
-			p2 = ufs_get_direct_data_ptr(uspi, ufsi, lastblock);
-			tmp = ufs_new_fragments(inode, p2, lastfrag,
-						ufs_data_ptr_to_cpu(sb, p2),
-						uspi->s_fpb - lastblockoff,
-						err, locked_page);
-			if (!tmp) {
-				if (lastfrag != ufsi->i_lastfrag)
-					goto repeat;
-				else
-					return NULL;
-			}
-			lastfrag = ufsi->i_lastfrag;
-			
-		}
-		tmp = ufs_data_ptr_to_cpu(sb,
-					 ufs_get_direct_data_ptr(uspi, ufsi,
-								 lastblock));
-		if (tmp)
-			goal = tmp + uspi->s_fpb;
-		tmp = ufs_new_fragments (inode, p, fragment - blockoff, 
-					 goal, required + blockoff,
-					 err,
-					 phys != NULL ? locked_page : NULL);
-	} else if (lastblock == block) {
-	/*
-	 * We will extend last allocated block
-	 */
-		tmp = ufs_new_fragments(inode, p, fragment -
-					(blockoff - lastblockoff),
-					ufs_data_ptr_to_cpu(sb, p),
-					required +  (blockoff - lastblockoff),
-					err, phys != NULL ? locked_page : NULL);
-	} else /* (lastblock > block) */ {
-	/*
-	 * We will allocate new block before last allocated block
-	 */
-		if (block) {
-			tmp = ufs_data_ptr_to_cpu(sb,
-						 ufs_get_direct_data_ptr(uspi, ufsi, block - 1));
-			if (tmp)
-				goal = tmp + uspi->s_fpb;
-		}
-		tmp = ufs_new_fragments(inode, p, fragment - blockoff,
-					goal, uspi->s_fpb, err,
-					phys != NULL ? locked_page : NULL);
+	/* will that be a new tail? */
+	if (new_fragment < UFS_NDIR_FRAGMENT && new_fragment >= lastfrag)
+		nfrags = (new_fragment & uspi->s_fpbmask) + 1;
+
+	goal = 0;
+	if (index) {
+		goal = ufs_data_ptr_to_cpu(sb,
+				 ufs_get_direct_data_ptr(uspi, ufsi, index - 1));
+		if (goal)
+			goal += uspi->s_fpb;
 	}
+	tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment),
+				goal, uspi->s_fpb, err, locked_page);
+
 	if (!tmp) {
-		if ((!blockoff && ufs_data_ptr_to_cpu(sb, p)) ||
-		    (blockoff && lastfrag != ufsi->i_lastfrag))
-			goto repeat;
 		*err = -ENOSPC;
-		return NULL;
+		return 0;
 	}
 
-	if (!phys) {
-		result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
-	} else {
-		*phys = uspi->s_sbbase + tmp + blockoff;
-		result = NULL;
-		*err = 0;
+	if (new)
 		*new = 1;
-	}
-
 	inode->i_ctime = CURRENT_TIME_SEC;
 	if (IS_SYNC(inode))
 		ufs_sync_inode (inode);
 	mark_inode_dirty(inode);
-	UFSD("EXIT, result %llu\n", (unsigned long long)tmp + blockoff);
-	return result;
+out:
+	return tmp + uspi->s_sbbase;
 
      /* This part : To be implemented ....
         Required only for writing, not required for READ-ONLY.
@@ -316,95 +319,70 @@ repeat2:
 /**
  * ufs_inode_getblock() - allocate new block
  * @inode: pointer to inode
- * @bh: pointer to block which hold "pointer" to new allocated block
- * @fragment: number of `fragment' which hold pointer
- *   to new allocated block
+ * @ind_block: block number of the indirect block
+ * @index: number of pointer within the indirect block
  * @new_fragment: number of new allocated fragment
  *  (block will hold this fragment and also uspi->s_fpb-1)
  * @err: see ufs_inode_getfrag()
- * @phys: see ufs_inode_getfrag()
  * @new: see ufs_inode_getfrag()
  * @locked_page: see ufs_inode_getfrag()
  */
-static struct buffer_head *
-ufs_inode_getblock(struct inode *inode, struct buffer_head *bh,
-		  u64 fragment, sector_t new_fragment, int *err,
-		  long *phys, int *new, struct page *locked_page)
+static u64
+ufs_inode_getblock(struct inode *inode, u64 ind_block,
+		  unsigned index, sector_t new_fragment, int *err,
+		  int *new, struct page *locked_page)
 {
 	struct super_block *sb = inode->i_sb;
 	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
-	struct buffer_head * result;
-	unsigned blockoff;
-	u64 tmp, goal, block;
+	int shift = uspi->s_apbshift - uspi->s_fpbshift;
+	u64 tmp = 0, goal;
+	struct buffer_head *bh;
 	void *p;
 
-	block = ufs_fragstoblks (fragment);
-	blockoff = ufs_fragnum (fragment);
-
-	UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, metadata %d\n",
-	     inode->i_ino, (unsigned long long)fragment,
-	     (unsigned long long)new_fragment, !phys);
+	if (!ind_block)
+		return 0;
 
-	result = NULL;
-	if (!bh)
-		goto out;
-	if (!buffer_uptodate(bh)) {
-		ll_rw_block (READ, 1, &bh);
-		wait_on_buffer (bh);
-		if (!buffer_uptodate(bh))
-			goto out;
+	bh = sb_bread(sb, ind_block + (index >> shift));
+	if (unlikely(!bh)) {
+		*err = -EIO;
+		return 0;
 	}
+
+	index &= uspi->s_apbmask >> uspi->s_fpbshift;
 	if (uspi->fs_magic == UFS2_MAGIC)
-		p = (__fs64 *)bh->b_data + block;
+		p = (__fs64 *)bh->b_data + index;
 	else
-		p = (__fs32 *)bh->b_data + block;
-repeat:
+		p = (__fs32 *)bh->b_data + index;
+
 	tmp = ufs_data_ptr_to_cpu(sb, p);
-	if (tmp) {
-		if (!phys) {
-			result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
-			if (tmp == ufs_data_ptr_to_cpu(sb, p))
-				goto out;
-			brelse (result);
-			goto repeat;
-		} else {
-			*phys = uspi->s_sbbase + tmp + blockoff;
-			goto out;
-		}
-	}
+	if (tmp)
+		goto out;
 
-	if (block && (uspi->fs_magic == UFS2_MAGIC ?
-		      (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[block-1])) :
-		      (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[block-1]))))
+	if (index && (uspi->fs_magic == UFS2_MAGIC ?
+		      (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[index-1])) :
+		      (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[index-1]))))
 		goal = tmp + uspi->s_fpb;
 	else
 		goal = bh->b_blocknr + uspi->s_fpb;
 	tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal,
 				uspi->s_fpb, err, locked_page);
-	if (!tmp) {
-		if (ufs_data_ptr_to_cpu(sb, p))
-			goto repeat;
+	if (!tmp)
 		goto out;
-	}		
-
 
-	if (!phys) {
-		result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
-	} else {
-		*phys = uspi->s_sbbase + tmp + blockoff;
+	if (new)
 		*new = 1;
-	}
 
 	mark_buffer_dirty(bh);
 	if (IS_SYNC(inode))
 		sync_dirty_buffer(bh);
 	inode->i_ctime = CURRENT_TIME_SEC;
 	mark_inode_dirty(inode);
-	UFSD("result %llu\n", (unsigned long long)tmp + blockoff);
 out:
 	brelse (bh);
 	UFSD("EXIT\n");
-	return result;
+	if (tmp)
+		tmp += uspi->s_sbbase;
+	return tmp;
 }
 
 /**
@@ -412,103 +390,64 @@ out:
  * readpage, writepage and so on
  */
 
-int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
+static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
 {
-	struct super_block * sb = inode->i_sb;
-	struct ufs_sb_info * sbi = UFS_SB(sb);
-	struct ufs_sb_private_info * uspi = sbi->s_uspi;
-	struct buffer_head * bh;
-	int ret, err, new;
-	unsigned long ptr,phys;
+	struct super_block *sb = inode->i_sb;
+	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+	int err = 0, new = 0;
+	unsigned offsets[4];
+	int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets);
 	u64 phys64 = 0;
-	bool needs_lock = (sbi->mutex_owner != current);
-	
+	unsigned frag = fragment & uspi->s_fpbmask;
+
 	if (!create) {
-		phys64 = ufs_frag_map(inode, fragment, needs_lock);
-		UFSD("phys64 = %llu\n", (unsigned long long)phys64);
-		if (phys64)
-			map_bh(bh_result, sb, phys64);
-		return 0;
+		phys64 = ufs_frag_map(inode, offsets, depth);
+		goto out;
 	}
 
         /* This code entered only while writing ....? */
 
-	err = -EIO;
-	new = 0;
-	ret = 0;
-	bh = NULL;
-
-	if (needs_lock)
-		lock_ufs(sb);
+	mutex_lock(&UFS_I(inode)->truncate_mutex);
 
 	UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
-	if (fragment >
-	    ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb)
-	     << uspi->s_fpbshift))
-		goto abort_too_big;
-
-	err = 0;
-	ptr = fragment;
-	  
-	/*
-	 * ok, these macros clean the logic up a bit and make
-	 * it much more readable:
-	 */
-#define GET_INODE_DATABLOCK(x) \
-	ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\
-			  bh_result->b_page)
-#define GET_INODE_PTR(x) \
-	ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\
-			  bh_result->b_page)
-#define GET_INDIRECT_DATABLOCK(x) \
-	ufs_inode_getblock(inode, bh, x, fragment,	\
-			  &err, &phys, &new, bh_result->b_page)
-#define GET_INDIRECT_PTR(x) \
-	ufs_inode_getblock(inode, bh, x, fragment,	\
-			  &err, NULL, NULL, NULL)
-
-	if (ptr < UFS_NDIR_FRAGMENT) {
-		bh = GET_INODE_DATABLOCK(ptr);
+	if (unlikely(!depth)) {
+		ufs_warning(sb, "ufs_get_block", "block > big");
+		err = -EIO;
 		goto out;
 	}
-	ptr -= UFS_NDIR_FRAGMENT;
-	if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) {
-		bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift));
-		goto get_indirect;
-	}
-	ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift);
-	if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) {
-		bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift));
-		goto get_double;
-	}
-	ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift);
-	bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift));
-	bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask);
-get_double:
-	bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask);
-get_indirect:
-	bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask);
-
-#undef GET_INODE_DATABLOCK
-#undef GET_INODE_PTR
-#undef GET_INDIRECT_DATABLOCK
-#undef GET_INDIRECT_PTR
 
-out:
-	if (err)
-		goto abort;
-	if (new)
-		set_buffer_new(bh_result);
-	map_bh(bh_result, sb, phys);
-abort:
-	if (needs_lock)
-		unlock_ufs(sb);
+	if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) {
+		unsigned lastfrag = UFS_I(inode)->i_lastfrag;
+		unsigned tailfrags = lastfrag & uspi->s_fpbmask;
+		if (tailfrags && fragment >= lastfrag) {
+			if (!ufs_extend_tail(inode, fragment,
+					     &err, bh_result->b_page))
+				goto out;
+		}
+	}
 
+	if (depth == 1) {
+		phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
+					   &err, &new, bh_result->b_page);
+	} else {
+		int i;
+		phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
+					   &err, NULL, NULL);
+		for (i = 1; i < depth - 1; i++)
+			phys64 = ufs_inode_getblock(inode, phys64, offsets[i],
+						fragment, &err, NULL, NULL);
+		phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1],
+					fragment, &err, &new, bh_result->b_page);
+	}
+out:
+	if (phys64) {
+		phys64 += frag;
+		map_bh(bh_result, sb, phys64);
+		if (new)
+			set_buffer_new(bh_result);
+	}
+	mutex_unlock(&UFS_I(inode)->truncate_mutex);
 	return err;
-
-abort_too_big:
-	ufs_warning(sb, "ufs_get_block", "block > big");
-	goto abort;
 }
 
 static int ufs_writepage(struct page *page, struct writeback_control *wbc)
@@ -526,12 +465,16 @@ int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len)
 	return __block_write_begin(page, pos, len, ufs_getfrag_block);
 }
 
+static void ufs_truncate_blocks(struct inode *);
+
 static void ufs_write_failed(struct address_space *mapping, loff_t to)
 {
 	struct inode *inode = mapping->host;
 
-	if (to > inode->i_size)
+	if (to > inode->i_size) {
 		truncate_pagecache(inode, inode->i_size);
+		ufs_truncate_blocks(inode);
+	}
 }
 
 static int ufs_write_begin(struct file *file, struct address_space *mapping,
@@ -548,6 +491,18 @@ static int ufs_write_begin(struct file *file, struct address_space *mapping,
 	return ret;
 }
 
+static int ufs_write_end(struct file *file, struct address_space *mapping,
+			loff_t pos, unsigned len, unsigned copied,
+			struct page *page, void *fsdata)
+{
+	int ret;
+
+	ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata);
+	if (ret < len)
+		ufs_write_failed(mapping, pos + len);
+	return ret;
+}
+
 static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
 {
 	return generic_block_bmap(mapping,block,ufs_getfrag_block);
@@ -557,7 +512,7 @@ const struct address_space_operations ufs_aops = {
 	.readpage = ufs_readpage,
 	.writepage = ufs_writepage,
 	.write_begin = ufs_write_begin,
-	.write_end = generic_write_end,
+	.write_end = ufs_write_end,
 	.bmap = ufs_bmap
 };
 
@@ -572,9 +527,10 @@ static void ufs_set_inode_ops(struct inode *inode)
 		inode->i_fop = &ufs_dir_operations;
 		inode->i_mapping->a_ops = &ufs_aops;
 	} else if (S_ISLNK(inode->i_mode)) {
-		if (!inode->i_blocks)
+		if (!inode->i_blocks) {
 			inode->i_op = &ufs_fast_symlink_inode_operations;
-		else {
+			inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink;
+		} else {
 			inode->i_op = &ufs_symlink_inode_operations;
 			inode->i_mapping->a_ops = &ufs_aops;
 		}
@@ -598,7 +554,7 @@ static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
 		ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
 		return -1;
 	}
-	
+
 	/*
 	 * Linux now has 32-bit uid and gid, so we can support EFT.
 	 */
@@ -618,7 +574,7 @@ static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
 	ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
 	ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
 
-	
+
 	if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
 		memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr,
 		       sizeof(ufs_inode->ui_u2.ui_addr));
@@ -752,7 +708,7 @@ static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
 
 	ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode));
 	ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode));
-		
+
 	ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
 	ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
 	ufs_inode->ui_atime.tv_usec = 0;
@@ -854,23 +810,19 @@ static int ufs_update_inode(struct inode * inode, int do_sync)
 
 		ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
 	}
-		
+
 	mark_buffer_dirty(bh);
 	if (do_sync)
 		sync_dirty_buffer(bh);
 	brelse (bh);
-	
+
 	UFSD("EXIT\n");
 	return 0;
 }
 
 int ufs_write_inode(struct inode *inode, struct writeback_control *wbc)
 {
-	int ret;
-	lock_ufs(inode->i_sb);
-	ret = ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
-	unlock_ufs(inode->i_sb);
-	return ret;
+	return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
 }
 
 int ufs_sync_inode (struct inode *inode)
@@ -887,24 +839,389 @@ void ufs_evict_inode(struct inode * inode)
 
 	truncate_inode_pages_final(&inode->i_data);
 	if (want_delete) {
-		loff_t old_i_size;
-		/*UFS_I(inode)->i_dtime = CURRENT_TIME;*/
-		lock_ufs(inode->i_sb);
-		mark_inode_dirty(inode);
-		ufs_update_inode(inode, IS_SYNC(inode));
-		old_i_size = inode->i_size;
 		inode->i_size = 0;
-		if (inode->i_blocks && ufs_truncate(inode, old_i_size))
-			ufs_warning(inode->i_sb, __func__, "ufs_truncate failed\n");
-		unlock_ufs(inode->i_sb);
+		if (inode->i_blocks)
+			ufs_truncate_blocks(inode);
 	}
 
 	invalidate_inode_buffers(inode);
 	clear_inode(inode);
 
-	if (want_delete) {
-		lock_ufs(inode->i_sb);
+	if (want_delete)
 		ufs_free_inode(inode);
-		unlock_ufs(inode->i_sb);
+}
+
+struct to_free {
+	struct inode *inode;
+	u64 to;
+	unsigned count;
+};
+
+static inline void free_data(struct to_free *ctx, u64 from, unsigned count)
+{
+	if (ctx->count && ctx->to != from) {
+		ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count);
+		ctx->count = 0;
+	}
+	ctx->count += count;
+	ctx->to = from + count;
+}
+
+#define DIRECT_BLOCK ((inode->i_size + uspi->s_bsize - 1) >> uspi->s_bshift)
+#define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift)
+
+static void ufs_trunc_direct(struct inode *inode)
+{
+	struct ufs_inode_info *ufsi = UFS_I(inode);
+	struct super_block * sb;
+	struct ufs_sb_private_info * uspi;
+	void *p;
+	u64 frag1, frag2, frag3, frag4, block1, block2;
+	struct to_free ctx = {.inode = inode};
+	unsigned i, tmp;
+
+	UFSD("ENTER: ino %lu\n", inode->i_ino);
+
+	sb = inode->i_sb;
+	uspi = UFS_SB(sb)->s_uspi;
+
+	frag1 = DIRECT_FRAGMENT;
+	frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag);
+	frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1);
+	frag3 = frag4 & ~uspi->s_fpbmask;
+	block1 = block2 = 0;
+	if (frag2 > frag3) {
+		frag2 = frag4;
+		frag3 = frag4 = 0;
+	} else if (frag2 < frag3) {
+		block1 = ufs_fragstoblks (frag2);
+		block2 = ufs_fragstoblks (frag3);
+	}
+
+	UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu,"
+	     " frag3 %llu, frag4 %llu\n", inode->i_ino,
+	     (unsigned long long)frag1, (unsigned long long)frag2,
+	     (unsigned long long)block1, (unsigned long long)block2,
+	     (unsigned long long)frag3, (unsigned long long)frag4);
+
+	if (frag1 >= frag2)
+		goto next1;
+
+	/*
+	 * Free first free fragments
+	 */
+	p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1));
+	tmp = ufs_data_ptr_to_cpu(sb, p);
+	if (!tmp )
+		ufs_panic (sb, "ufs_trunc_direct", "internal error");
+	frag2 -= frag1;
+	frag1 = ufs_fragnum (frag1);
+
+	ufs_free_fragments(inode, tmp + frag1, frag2);
+
+next1:
+	/*
+	 * Free whole blocks
+	 */
+	for (i = block1 ; i < block2; i++) {
+		p = ufs_get_direct_data_ptr(uspi, ufsi, i);
+		tmp = ufs_data_ptr_to_cpu(sb, p);
+		if (!tmp)
+			continue;
+		write_seqlock(&ufsi->meta_lock);
+		ufs_data_ptr_clear(uspi, p);
+		write_sequnlock(&ufsi->meta_lock);
+
+		free_data(&ctx, tmp, uspi->s_fpb);
+	}
+
+	free_data(&ctx, 0, 0);
+
+	if (frag3 >= frag4)
+		goto next3;
+
+	/*
+	 * Free last free fragments
+	 */
+	p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3));
+	tmp = ufs_data_ptr_to_cpu(sb, p);
+	if (!tmp )
+		ufs_panic(sb, "ufs_truncate_direct", "internal error");
+	frag4 = ufs_fragnum (frag4);
+	write_seqlock(&ufsi->meta_lock);
+	ufs_data_ptr_clear(uspi, p);
+	write_sequnlock(&ufsi->meta_lock);
+
+	ufs_free_fragments (inode, tmp, frag4);
+ next3:
+
+	UFSD("EXIT: ino %lu\n", inode->i_ino);
+}
+
+static void free_full_branch(struct inode *inode, u64 ind_block, int depth)
+{
+	struct super_block *sb = inode->i_sb;
+	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+	struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize);
+	unsigned i;
+
+	if (!ubh)
+		return;
+
+	if (--depth) {
+		for (i = 0; i < uspi->s_apb; i++) {
+			void *p = ubh_get_data_ptr(uspi, ubh, i);
+			u64 block = ufs_data_ptr_to_cpu(sb, p);
+			if (block)
+				free_full_branch(inode, block, depth);
+		}
+	} else {
+		struct to_free ctx = {.inode = inode};
+
+		for (i = 0; i < uspi->s_apb; i++) {
+			void *p = ubh_get_data_ptr(uspi, ubh, i);
+			u64 block = ufs_data_ptr_to_cpu(sb, p);
+			if (block)
+				free_data(&ctx, block, uspi->s_fpb);
+		}
+		free_data(&ctx, 0, 0);
+	}
+
+	ubh_bforget(ubh);
+	ufs_free_blocks(inode, ind_block, uspi->s_fpb);
+}
+
+static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth)
+{
+	struct super_block *sb = inode->i_sb;
+	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+	unsigned i;
+
+	if (--depth) {
+		for (i = from; i < uspi->s_apb ; i++) {
+			void *p = ubh_get_data_ptr(uspi, ubh, i);
+			u64 block = ufs_data_ptr_to_cpu(sb, p);
+			if (block) {
+				write_seqlock(&UFS_I(inode)->meta_lock);
+				ufs_data_ptr_clear(uspi, p);
+				write_sequnlock(&UFS_I(inode)->meta_lock);
+				ubh_mark_buffer_dirty(ubh);
+				free_full_branch(inode, block, depth);
+			}
+		}
+	} else {
+		struct to_free ctx = {.inode = inode};
+
+		for (i = from; i < uspi->s_apb; i++) {
+			void *p = ubh_get_data_ptr(uspi, ubh, i);
+			u64 block = ufs_data_ptr_to_cpu(sb, p);
+			if (block) {
+				write_seqlock(&UFS_I(inode)->meta_lock);
+				ufs_data_ptr_clear(uspi, p);
+				write_sequnlock(&UFS_I(inode)->meta_lock);
+				ubh_mark_buffer_dirty(ubh);
+				free_data(&ctx, block, uspi->s_fpb);
+			}
+		}
+		free_data(&ctx, 0, 0);
+	}
+	if (IS_SYNC(inode) && ubh_buffer_dirty(ubh))
+		ubh_sync_block(ubh);
+	ubh_brelse(ubh);
+}
+
+static int ufs_alloc_lastblock(struct inode *inode, loff_t size)
+{
+	int err = 0;
+	struct super_block *sb = inode->i_sb;
+	struct address_space *mapping = inode->i_mapping;
+	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+	unsigned i, end;
+	sector_t lastfrag;
+	struct page *lastpage;
+	struct buffer_head *bh;
+	u64 phys64;
+
+	lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
+
+	if (!lastfrag)
+		goto out;
+
+	lastfrag--;
+
+	lastpage = ufs_get_locked_page(mapping, lastfrag >>
+				       (PAGE_CACHE_SHIFT - inode->i_blkbits));
+       if (IS_ERR(lastpage)) {
+               err = -EIO;
+               goto out;
+       }
+
+       end = lastfrag & ((1 << (PAGE_CACHE_SHIFT - inode->i_blkbits)) - 1);
+       bh = page_buffers(lastpage);
+       for (i = 0; i < end; ++i)
+               bh = bh->b_this_page;
+
+
+       err = ufs_getfrag_block(inode, lastfrag, bh, 1);
+
+       if (unlikely(err))
+	       goto out_unlock;
+
+       if (buffer_new(bh)) {
+	       clear_buffer_new(bh);
+	       unmap_underlying_metadata(bh->b_bdev,
+					 bh->b_blocknr);
+	       /*
+		* we do not zeroize fragment, because of
+		* if it maped to hole, it already contains zeroes
+		*/
+	       set_buffer_uptodate(bh);
+	       mark_buffer_dirty(bh);
+	       set_page_dirty(lastpage);
+       }
+
+       if (lastfrag >= UFS_IND_FRAGMENT) {
+	       end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1;
+	       phys64 = bh->b_blocknr + 1;
+	       for (i = 0; i < end; ++i) {
+		       bh = sb_getblk(sb, i + phys64);
+		       lock_buffer(bh);
+		       memset(bh->b_data, 0, sb->s_blocksize);
+		       set_buffer_uptodate(bh);
+		       mark_buffer_dirty(bh);
+		       unlock_buffer(bh);
+		       sync_dirty_buffer(bh);
+		       brelse(bh);
+	       }
+       }
+out_unlock:
+       ufs_put_locked_page(lastpage);
+out:
+       return err;
+}
+
+static void __ufs_truncate_blocks(struct inode *inode)
+{
+	struct ufs_inode_info *ufsi = UFS_I(inode);
+	struct super_block *sb = inode->i_sb;
+	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+	unsigned offsets[4];
+	int depth = ufs_block_to_path(inode, DIRECT_BLOCK, offsets);
+	int depth2;
+	unsigned i;
+	struct ufs_buffer_head *ubh[3];
+	void *p;
+	u64 block;
+
+	if (!depth)
+		return;
+
+	/* find the last non-zero in offsets[] */
+	for (depth2 = depth - 1; depth2; depth2--)
+		if (offsets[depth2])
+			break;
+
+	mutex_lock(&ufsi->truncate_mutex);
+	if (depth == 1) {
+		ufs_trunc_direct(inode);
+		offsets[0] = UFS_IND_BLOCK;
+	} else {
+		/* get the blocks that should be partially emptied */
+		p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]);
+		for (i = 0; i < depth2; i++) {
+			offsets[i]++;	/* next branch is fully freed */
+			block = ufs_data_ptr_to_cpu(sb, p);
+			if (!block)
+				break;
+			ubh[i] = ubh_bread(sb, block, uspi->s_bsize);
+			if (!ubh[i]) {
+				write_seqlock(&ufsi->meta_lock);
+				ufs_data_ptr_clear(uspi, p);
+				write_sequnlock(&ufsi->meta_lock);
+				break;
+			}
+			p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]);
+		}
+		while (i--)
+			free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1);
+	}
+	for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) {
+		p = ufs_get_direct_data_ptr(uspi, ufsi, i);
+		block = ufs_data_ptr_to_cpu(sb, p);
+		if (block) {
+			write_seqlock(&ufsi->meta_lock);
+			ufs_data_ptr_clear(uspi, p);
+			write_sequnlock(&ufsi->meta_lock);
+			free_full_branch(inode, block, i - UFS_IND_BLOCK + 1);
+		}
 	}
+	ufsi->i_lastfrag = DIRECT_FRAGMENT;
+	mark_inode_dirty(inode);
+	mutex_unlock(&ufsi->truncate_mutex);
+}
+
+static int ufs_truncate(struct inode *inode, loff_t size)
+{
+	int err = 0;
+
+	UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n",
+	     inode->i_ino, (unsigned long long)size,
+	     (unsigned long long)i_size_read(inode));
+
+	if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
+	      S_ISLNK(inode->i_mode)))
+		return -EINVAL;
+	if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
+		return -EPERM;
+
+	err = ufs_alloc_lastblock(inode, size);
+
+	if (err)
+		goto out;
+
+	block_truncate_page(inode->i_mapping, size, ufs_getfrag_block);
+
+	truncate_setsize(inode, size);
+
+	__ufs_truncate_blocks(inode);
+	inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
+	mark_inode_dirty(inode);
+out:
+	UFSD("EXIT: err %d\n", err);
+	return err;
+}
+
+void ufs_truncate_blocks(struct inode *inode)
+{
+	if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
+	      S_ISLNK(inode->i_mode)))
+		return;
+	if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
+		return;
+	__ufs_truncate_blocks(inode);
+}
+
+int ufs_setattr(struct dentry *dentry, struct iattr *attr)
+{
+	struct inode *inode = d_inode(dentry);
+	unsigned int ia_valid = attr->ia_valid;
+	int error;
+
+	error = inode_change_ok(inode, attr);
+	if (error)
+		return error;
+
+	if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) {
+		error = ufs_truncate(inode, attr->ia_size);
+		if (error)
+			return error;
+	}
+
+	setattr_copy(inode, attr);
+	mark_inode_dirty(inode);
+	return 0;
 }
+
+const struct inode_operations ufs_file_inode_operations = {
+	.setattr = ufs_setattr,
+};
diff --git a/kernel/fs/ufs/namei.c b/kernel/fs/ufs/namei.c
index 60ee32249..479665543 100644
--- a/kernel/fs/ufs/namei.c
+++ b/kernel/fs/ufs/namei.c
@@ -56,11 +56,9 @@ static struct dentry *ufs_lookup(struct inode * dir, struct dentry *dentry, unsi
 	if (dentry->d_name.len > UFS_MAXNAMLEN)
 		return ERR_PTR(-ENAMETOOLONG);
 
-	lock_ufs(dir->i_sb);
 	ino = ufs_inode_by_name(dir, &dentry->d_name);
 	if (ino)
 		inode = ufs_iget(dir->i_sb, ino);
-	unlock_ufs(dir->i_sb);
 	return d_splice_alias(inode, dentry);
 }
 
@@ -76,24 +74,16 @@ static int ufs_create (struct inode * dir, struct dentry * dentry, umode_t mode,
 		bool excl)
 {
 	struct inode *inode;
-	int err;
-
-	UFSD("BEGIN\n");
 
 	inode = ufs_new_inode(dir, mode);
-	err = PTR_ERR(inode);
+	if (IS_ERR(inode))
+		return PTR_ERR(inode);
 
-	if (!IS_ERR(inode)) {
-		inode->i_op = &ufs_file_inode_operations;
-		inode->i_fop = &ufs_file_operations;
-		inode->i_mapping->a_ops = &ufs_aops;
-		mark_inode_dirty(inode);
-		lock_ufs(dir->i_sb);
-		err = ufs_add_nondir(dentry, inode);
-		unlock_ufs(dir->i_sb);
-	}
-	UFSD("END: err=%d\n", err);
-	return err;
+	inode->i_op = &ufs_file_inode_operations;
+	inode->i_fop = &ufs_file_operations;
+	inode->i_mapping->a_ops = &ufs_aops;
+	mark_inode_dirty(inode);
+	return ufs_add_nondir(dentry, inode);
 }
 
 static int ufs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev)
@@ -110,9 +100,7 @@ static int ufs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev
 		init_special_inode(inode, mode, rdev);
 		ufs_set_inode_dev(inode->i_sb, UFS_I(inode), rdev);
 		mark_inode_dirty(inode);
-		lock_ufs(dir->i_sb);
 		err = ufs_add_nondir(dentry, inode);
-		unlock_ufs(dir->i_sb);
 	}
 	return err;
 }
@@ -121,18 +109,17 @@ static int ufs_symlink (struct inode * dir, struct dentry * dentry,
 	const char * symname)
 {
 	struct super_block * sb = dir->i_sb;
-	int err = -ENAMETOOLONG;
+	int err;
 	unsigned l = strlen(symname)+1;
 	struct inode * inode;
 
 	if (l > sb->s_blocksize)
-		goto out_notlocked;
+		return -ENAMETOOLONG;
 
-	lock_ufs(dir->i_sb);
 	inode = ufs_new_inode(dir, S_IFLNK | S_IRWXUGO);
 	err = PTR_ERR(inode);
 	if (IS_ERR(inode))
-		goto out;
+		return err;
 
 	if (l > UFS_SB(sb)->s_uspi->s_maxsymlinklen) {
 		/* slow symlink */
@@ -144,22 +131,19 @@ static int ufs_symlink (struct inode * dir, struct dentry * dentry,
 	} else {
 		/* fast symlink */
 		inode->i_op = &ufs_fast_symlink_inode_operations;
-		memcpy(UFS_I(inode)->i_u1.i_symlink, symname, l);
+		inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink;
+		memcpy(inode->i_link, symname, l);
 		inode->i_size = l-1;
 	}
 	mark_inode_dirty(inode);
 
-	err = ufs_add_nondir(dentry, inode);
-out:
-	unlock_ufs(dir->i_sb);
-out_notlocked:
-	return err;
+	return ufs_add_nondir(dentry, inode);
 
 out_fail:
 	inode_dec_link_count(inode);
 	unlock_new_inode(inode);
 	iput(inode);
-	goto out;
+	return err;
 }
 
 static int ufs_link (struct dentry * old_dentry, struct inode * dir,
@@ -168,8 +152,6 @@ static int ufs_link (struct dentry * old_dentry, struct inode * dir,
 	struct inode *inode = d_inode(old_dentry);
 	int error;
 
-	lock_ufs(dir->i_sb);
-
 	inode->i_ctime = CURRENT_TIME_SEC;
 	inode_inc_link_count(inode);
 	ihold(inode);
@@ -180,7 +162,6 @@ static int ufs_link (struct dentry * old_dentry, struct inode * dir,
 		iput(inode);
 	} else
 		d_instantiate(dentry, inode);
-	unlock_ufs(dir->i_sb);
 	return error;
 }
 
@@ -189,7 +170,6 @@ static int ufs_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode)
 	struct inode * inode;
 	int err;
 
-	lock_ufs(dir->i_sb);
 	inode_inc_link_count(dir);
 
 	inode = ufs_new_inode(dir, S_IFDIR|mode);
@@ -210,12 +190,10 @@ static int ufs_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode)
 	err = ufs_add_link(dentry, inode);
 	if (err)
 		goto out_fail;
-	unlock_ufs(dir->i_sb);
 
 	unlock_new_inode(inode);
 	d_instantiate(dentry, inode);
-out:
-	return err;
+	return 0;
 
 out_fail:
 	inode_dec_link_count(inode);
@@ -224,8 +202,7 @@ out_fail:
 	iput (inode);
 out_dir:
 	inode_dec_link_count(dir);
-	unlock_ufs(dir->i_sb);
-	goto out;
+	return err;
 }
 
 static int ufs_unlink(struct inode *dir, struct dentry *dentry)
@@ -255,7 +232,6 @@ static int ufs_rmdir (struct inode * dir, struct dentry *dentry)
 	struct inode * inode = d_inode(dentry);
 	int err= -ENOTEMPTY;
 
-	lock_ufs(dir->i_sb);
 	if (ufs_empty_dir (inode)) {
 		err = ufs_unlink(dir, dentry);
 		if (!err) {
@@ -264,7 +240,6 @@ static int ufs_rmdir (struct inode * dir, struct dentry *dentry)
 			inode_dec_link_count(dir);
 		}
 	}
-	unlock_ufs(dir->i_sb);
 	return err;
 }
 
@@ -302,7 +277,7 @@ static int ufs_rename(struct inode *old_dir, struct dentry *old_dentry,
 		new_de = ufs_find_entry(new_dir, &new_dentry->d_name, &new_page);
 		if (!new_de)
 			goto out_dir;
-		ufs_set_link(new_dir, new_de, new_page, old_inode);
+		ufs_set_link(new_dir, new_de, new_page, old_inode, 1);
 		new_inode->i_ctime = CURRENT_TIME_SEC;
 		if (dir_de)
 			drop_nlink(new_inode);
@@ -325,7 +300,12 @@ static int ufs_rename(struct inode *old_dir, struct dentry *old_dentry,
 	mark_inode_dirty(old_inode);
 
 	if (dir_de) {
-		ufs_set_link(old_inode, dir_de, dir_page, new_dir);
+		if (old_dir != new_dir)
+			ufs_set_link(old_inode, dir_de, dir_page, new_dir, 0);
+		else {
+			kunmap(dir_page);
+			page_cache_release(dir_page);
+		}
 		inode_dec_link_count(old_dir);
 	}
 	return 0;
diff --git a/kernel/fs/ufs/super.c b/kernel/fs/ufs/super.c
index dc33f9416..f6390eec0 100644
--- a/kernel/fs/ufs/super.c
+++ b/kernel/fs/ufs/super.c
@@ -80,6 +80,7 @@
 #include <linux/stat.h>
 #include <linux/string.h>
 #include <linux/blkdev.h>
+#include <linux/backing-dev.h>
 #include <linux/init.h>
 #include <linux/parser.h>
 #include <linux/buffer_head.h>
@@ -93,22 +94,6 @@
 #include "swab.h"
 #include "util.h"
 
-void lock_ufs(struct super_block *sb)
-{
-	struct ufs_sb_info *sbi = UFS_SB(sb);
-
-	mutex_lock(&sbi->mutex);
-	sbi->mutex_owner = current;
-}
-
-void unlock_ufs(struct super_block *sb)
-{
-	struct ufs_sb_info *sbi = UFS_SB(sb);
-
-	sbi->mutex_owner = NULL;
-	mutex_unlock(&sbi->mutex);
-}
-
 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
 {
 	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
@@ -693,7 +678,6 @@ static int ufs_sync_fs(struct super_block *sb, int wait)
 	struct ufs_super_block_third * usb3;
 	unsigned flags;
 
-	lock_ufs(sb);
 	mutex_lock(&UFS_SB(sb)->s_lock);
 
 	UFSD("ENTER\n");
@@ -713,7 +697,6 @@ static int ufs_sync_fs(struct super_block *sb, int wait)
 
 	UFSD("EXIT\n");
 	mutex_unlock(&UFS_SB(sb)->s_lock);
-	unlock_ufs(sb);
 
 	return 0;
 }
@@ -757,7 +740,6 @@ static void ufs_put_super(struct super_block *sb)
 
 	ubh_brelse_uspi (sbi->s_uspi);
 	kfree (sbi->s_uspi);
-	mutex_destroy(&sbi->mutex);
 	kfree (sbi);
 	sb->s_fs_info = NULL;
 	UFSD("EXIT\n");
@@ -800,7 +782,6 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 
 	UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
 	
-	mutex_init(&sbi->mutex);
 	mutex_init(&sbi->s_lock);
 	spin_lock_init(&sbi->work_lock);
 	INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
@@ -1256,7 +1237,6 @@ magic_found:
 	return 0;
 
 failed:
-	mutex_destroy(&sbi->mutex);
 	if (ubh)
 		ubh_brelse_uspi (uspi);
 	kfree (uspi);
@@ -1279,7 +1259,6 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
 	unsigned flags;
 
 	sync_filesystem(sb);
-	lock_ufs(sb);
 	mutex_lock(&UFS_SB(sb)->s_lock);
 	uspi = UFS_SB(sb)->s_uspi;
 	flags = UFS_SB(sb)->s_flags;
@@ -1295,7 +1274,6 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
 	ufs_set_opt (new_mount_opt, ONERROR_LOCK);
 	if (!ufs_parse_options (data, &new_mount_opt)) {
 		mutex_unlock(&UFS_SB(sb)->s_lock);
-		unlock_ufs(sb);
 		return -EINVAL;
 	}
 	if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
@@ -1303,14 +1281,12 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
 	} else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
 		pr_err("ufstype can't be changed during remount\n");
 		mutex_unlock(&UFS_SB(sb)->s_lock);
-		unlock_ufs(sb);
 		return -EINVAL;
 	}
 
 	if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
 		UFS_SB(sb)->s_mount_opt = new_mount_opt;
 		mutex_unlock(&UFS_SB(sb)->s_lock);
-		unlock_ufs(sb);
 		return 0;
 	}
 	
@@ -1334,7 +1310,6 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
 #ifndef CONFIG_UFS_FS_WRITE
 		pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
 		mutex_unlock(&UFS_SB(sb)->s_lock);
-		unlock_ufs(sb);
 		return -EINVAL;
 #else
 		if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 
@@ -1344,13 +1319,11 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
 		    ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
 			pr_err("this ufstype is read-only supported\n");
 			mutex_unlock(&UFS_SB(sb)->s_lock);
-			unlock_ufs(sb);
 			return -EINVAL;
 		}
 		if (!ufs_read_cylinder_structures(sb)) {
 			pr_err("failed during remounting\n");
 			mutex_unlock(&UFS_SB(sb)->s_lock);
-			unlock_ufs(sb);
 			return -EPERM;
 		}
 		sb->s_flags &= ~MS_RDONLY;
@@ -1358,7 +1331,6 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
 	}
 	UFS_SB(sb)->s_mount_opt = new_mount_opt;
 	mutex_unlock(&UFS_SB(sb)->s_lock);
-	unlock_ufs(sb);
 	return 0;
 }
 
@@ -1390,8 +1362,7 @@ static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
 	struct ufs_super_block_third *usb3;
 	u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
 
-	lock_ufs(sb);
-
+	mutex_lock(&UFS_SB(sb)->s_lock);
 	usb3 = ubh_get_usb_third(uspi);
 	
 	if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
@@ -1412,7 +1383,7 @@ static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
 	buf->f_fsid.val[0] = (u32)id;
 	buf->f_fsid.val[1] = (u32)(id >> 32);
 
-	unlock_ufs(sb);
+	mutex_unlock(&UFS_SB(sb)->s_lock);
 
 	return 0;
 }
@@ -1428,6 +1399,8 @@ static struct inode *ufs_alloc_inode(struct super_block *sb)
 		return NULL;
 
 	ei->vfs_inode.i_version = 1;
+	seqlock_init(&ei->meta_lock);
+	mutex_init(&ei->truncate_mutex);
 	return &ei->vfs_inode;
 }
 
diff --git a/kernel/fs/ufs/symlink.c b/kernel/fs/ufs/symlink.c
index 5b537e2fd..874480bb4 100644
--- a/kernel/fs/ufs/symlink.c
+++ b/kernel/fs/ufs/symlink.c
@@ -25,23 +25,12 @@
  *  ext2 symlink handling code
  */
 
-#include <linux/fs.h>
-#include <linux/namei.h>
-
 #include "ufs_fs.h"
 #include "ufs.h"
 
-
-static void *ufs_follow_link(struct dentry *dentry, struct nameidata *nd)
-{
-	struct ufs_inode_info *p = UFS_I(d_inode(dentry));
-	nd_set_link(nd, (char*)p->i_u1.i_symlink);
-	return NULL;
-}
-
 const struct inode_operations ufs_fast_symlink_inode_operations = {
 	.readlink	= generic_readlink,
-	.follow_link	= ufs_follow_link,
+	.follow_link	= simple_follow_link,
 	.setattr	= ufs_setattr,
 };
 
diff --git a/kernel/fs/ufs/truncate.c b/kernel/fs/ufs/truncate.c
deleted file mode 100644
index 21154704c..000000000
--- a/kernel/fs/ufs/truncate.c
+++ /dev/null
@@ -1,523 +0,0 @@
-/*
- *  linux/fs/ufs/truncate.c
- *
- * Copyright (C) 1998
- * Daniel Pirkl <daniel.pirkl@email.cz>
- * Charles University, Faculty of Mathematics and Physics
- *
- *  from
- *
- *  linux/fs/ext2/truncate.c
- *
- * Copyright (C) 1992, 1993, 1994, 1995
- * Remy Card (card@masi.ibp.fr)
- * Laboratoire MASI - Institut Blaise Pascal
- * Universite Pierre et Marie Curie (Paris VI)
- *
- *  from
- *
- *  linux/fs/minix/truncate.c
- *
- *  Copyright (C) 1991, 1992  Linus Torvalds
- *
- *  Big-endian to little-endian byte-swapping/bitmaps by
- *        David S. Miller (davem@caip.rutgers.edu), 1995
- */
-
-/*
- * Real random numbers for secure rm added 94/02/18
- * Idea from Pierre del Perugia <delperug@gla.ecoledoc.ibp.fr>
- */
-
-/*
- * Adoptation to use page cache and UFS2 write support by
- * Evgeniy Dushistov <dushistov@mail.ru>, 2006-2007
- */
-
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/fcntl.h>
-#include <linux/time.h>
-#include <linux/stat.h>
-#include <linux/string.h>
-#include <linux/buffer_head.h>
-#include <linux/blkdev.h>
-#include <linux/sched.h>
-
-#include "ufs_fs.h"
-#include "ufs.h"
-#include "swab.h"
-#include "util.h"
-
-/*
- * Secure deletion currently doesn't work. It interacts very badly
- * with buffers shared with memory mappings, and for that reason
- * can't be done in the truncate() routines. It should instead be
- * done separately in "release()" before calling the truncate routines
- * that will release the actual file blocks.
- *
- *		Linus
- */
-
-#define DIRECT_BLOCK ((inode->i_size + uspi->s_bsize - 1) >> uspi->s_bshift)
-#define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift)
-
-
-static int ufs_trunc_direct(struct inode *inode)
-{
-	struct ufs_inode_info *ufsi = UFS_I(inode);
-	struct super_block * sb;
-	struct ufs_sb_private_info * uspi;
-	void *p;
-	u64 frag1, frag2, frag3, frag4, block1, block2;
-	unsigned frag_to_free, free_count;
-	unsigned i, tmp;
-	int retry;
-	
-	UFSD("ENTER: ino %lu\n", inode->i_ino);
-
-	sb = inode->i_sb;
-	uspi = UFS_SB(sb)->s_uspi;
-	
-	frag_to_free = 0;
-	free_count = 0;
-	retry = 0;
-	
-	frag1 = DIRECT_FRAGMENT;
-	frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag);
-	frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1);
-	frag3 = frag4 & ~uspi->s_fpbmask;
-	block1 = block2 = 0;
-	if (frag2 > frag3) {
-		frag2 = frag4;
-		frag3 = frag4 = 0;
-	} else if (frag2 < frag3) {
-		block1 = ufs_fragstoblks (frag2);
-		block2 = ufs_fragstoblks (frag3);
-	}
-
-	UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu,"
-	     " frag3 %llu, frag4 %llu\n", inode->i_ino,
-	     (unsigned long long)frag1, (unsigned long long)frag2,
-	     (unsigned long long)block1, (unsigned long long)block2,
-	     (unsigned long long)frag3, (unsigned long long)frag4);
-
-	if (frag1 >= frag2)
-		goto next1;		
-
-	/*
-	 * Free first free fragments
-	 */
-	p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1));
-	tmp = ufs_data_ptr_to_cpu(sb, p);
-	if (!tmp )
-		ufs_panic (sb, "ufs_trunc_direct", "internal error");
-	frag2 -= frag1;
-	frag1 = ufs_fragnum (frag1);
-
-	ufs_free_fragments(inode, tmp + frag1, frag2);
-	mark_inode_dirty(inode);
-	frag_to_free = tmp + frag1;
-
-next1:
-	/*
-	 * Free whole blocks
-	 */
-	for (i = block1 ; i < block2; i++) {
-		p = ufs_get_direct_data_ptr(uspi, ufsi, i);
-		tmp = ufs_data_ptr_to_cpu(sb, p);
-		if (!tmp)
-			continue;
-		ufs_data_ptr_clear(uspi, p);
-
-		if (free_count == 0) {
-			frag_to_free = tmp;
-			free_count = uspi->s_fpb;
-		} else if (free_count > 0 && frag_to_free == tmp - free_count)
-			free_count += uspi->s_fpb;
-		else {
-			ufs_free_blocks (inode, frag_to_free, free_count);
-			frag_to_free = tmp;
-			free_count = uspi->s_fpb;
-		}
-		mark_inode_dirty(inode);
-	}
-	
-	if (free_count > 0)
-		ufs_free_blocks (inode, frag_to_free, free_count);
-
-	if (frag3 >= frag4)
-		goto next3;
-
-	/*
-	 * Free last free fragments
-	 */
-	p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3));
-	tmp = ufs_data_ptr_to_cpu(sb, p);
-	if (!tmp )
-		ufs_panic(sb, "ufs_truncate_direct", "internal error");
-	frag4 = ufs_fragnum (frag4);
-	ufs_data_ptr_clear(uspi, p);
-
-	ufs_free_fragments (inode, tmp, frag4);
-	mark_inode_dirty(inode);
- next3:
-
-	UFSD("EXIT: ino %lu\n", inode->i_ino);
-	return retry;
-}
-
-
-static int ufs_trunc_indirect(struct inode *inode, u64 offset, void *p)
-{
-	struct super_block * sb;
-	struct ufs_sb_private_info * uspi;
-	struct ufs_buffer_head * ind_ubh;
-	void *ind;
-	u64 tmp, indirect_block, i, frag_to_free;
-	unsigned free_count;
-	int retry;
-
-	UFSD("ENTER: ino %lu, offset %llu, p: %p\n",
-	     inode->i_ino, (unsigned long long)offset, p);
-
-	BUG_ON(!p);
-		
-	sb = inode->i_sb;
-	uspi = UFS_SB(sb)->s_uspi;
-
-	frag_to_free = 0;
-	free_count = 0;
-	retry = 0;
-	
-	tmp = ufs_data_ptr_to_cpu(sb, p);
-	if (!tmp)
-		return 0;
-	ind_ubh = ubh_bread(sb, tmp, uspi->s_bsize);
-	if (tmp != ufs_data_ptr_to_cpu(sb, p)) {
-		ubh_brelse (ind_ubh);
-		return 1;
-	}
-	if (!ind_ubh) {
-		ufs_data_ptr_clear(uspi, p);
-		return 0;
-	}
-
-	indirect_block = (DIRECT_BLOCK > offset) ? (DIRECT_BLOCK - offset) : 0;
-	for (i = indirect_block; i < uspi->s_apb; i++) {
-		ind = ubh_get_data_ptr(uspi, ind_ubh, i);
-		tmp = ufs_data_ptr_to_cpu(sb, ind);
-		if (!tmp)
-			continue;
-
-		ufs_data_ptr_clear(uspi, ind);
-		ubh_mark_buffer_dirty(ind_ubh);
-		if (free_count == 0) {
-			frag_to_free = tmp;
-			free_count = uspi->s_fpb;
-		} else if (free_count > 0 && frag_to_free == tmp - free_count)
-			free_count += uspi->s_fpb;
-		else {
-			ufs_free_blocks (inode, frag_to_free, free_count);
-			frag_to_free = tmp;
-			free_count = uspi->s_fpb;
-		}
-
-		mark_inode_dirty(inode);
-	}
-
-	if (free_count > 0) {
-		ufs_free_blocks (inode, frag_to_free, free_count);
-	}
-	for (i = 0; i < uspi->s_apb; i++)
-		if (!ufs_is_data_ptr_zero(uspi,
-					  ubh_get_data_ptr(uspi, ind_ubh, i)))
-			break;
-	if (i >= uspi->s_apb) {
-		tmp = ufs_data_ptr_to_cpu(sb, p);
-		ufs_data_ptr_clear(uspi, p);
-
-		ufs_free_blocks (inode, tmp, uspi->s_fpb);
-		mark_inode_dirty(inode);
-		ubh_bforget(ind_ubh);
-		ind_ubh = NULL;
-	}
-	if (IS_SYNC(inode) && ind_ubh && ubh_buffer_dirty(ind_ubh))
-		ubh_sync_block(ind_ubh);
-	ubh_brelse (ind_ubh);
-	
-	UFSD("EXIT: ino %lu\n", inode->i_ino);
-	
-	return retry;
-}
-
-static int ufs_trunc_dindirect(struct inode *inode, u64 offset, void *p)
-{
-	struct super_block * sb;
-	struct ufs_sb_private_info * uspi;
-	struct ufs_buffer_head *dind_bh;
-	u64 i, tmp, dindirect_block;
-	void *dind;
-	int retry = 0;
-	
-	UFSD("ENTER: ino %lu\n", inode->i_ino);
-	
-	sb = inode->i_sb;
-	uspi = UFS_SB(sb)->s_uspi;
-
-	dindirect_block = (DIRECT_BLOCK > offset) 
-		? ((DIRECT_BLOCK - offset) >> uspi->s_apbshift) : 0;
-	retry = 0;
-	
-	tmp = ufs_data_ptr_to_cpu(sb, p);
-	if (!tmp)
-		return 0;
-	dind_bh = ubh_bread(sb, tmp, uspi->s_bsize);
-	if (tmp != ufs_data_ptr_to_cpu(sb, p)) {
-		ubh_brelse (dind_bh);
-		return 1;
-	}
-	if (!dind_bh) {
-		ufs_data_ptr_clear(uspi, p);
-		return 0;
-	}
-
-	for (i = dindirect_block ; i < uspi->s_apb ; i++) {
-		dind = ubh_get_data_ptr(uspi, dind_bh, i);
-		tmp = ufs_data_ptr_to_cpu(sb, dind);
-		if (!tmp)
-			continue;
-		retry |= ufs_trunc_indirect (inode, offset + (i << uspi->s_apbshift), dind);
-		ubh_mark_buffer_dirty(dind_bh);
-	}
-
-	for (i = 0; i < uspi->s_apb; i++)
-		if (!ufs_is_data_ptr_zero(uspi,
-					  ubh_get_data_ptr(uspi, dind_bh, i)))
-			break;
-	if (i >= uspi->s_apb) {
-		tmp = ufs_data_ptr_to_cpu(sb, p);
-		ufs_data_ptr_clear(uspi, p);
-
-		ufs_free_blocks(inode, tmp, uspi->s_fpb);
-		mark_inode_dirty(inode);
-		ubh_bforget(dind_bh);
-		dind_bh = NULL;
-	}
-	if (IS_SYNC(inode) && dind_bh && ubh_buffer_dirty(dind_bh))
-		ubh_sync_block(dind_bh);
-	ubh_brelse (dind_bh);
-	
-	UFSD("EXIT: ino %lu\n", inode->i_ino);
-	
-	return retry;
-}
-
-static int ufs_trunc_tindirect(struct inode *inode)
-{
-	struct super_block *sb = inode->i_sb;
-	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
-	struct ufs_inode_info *ufsi = UFS_I(inode);
-	struct ufs_buffer_head * tind_bh;
-	u64 tindirect_block, tmp, i;
-	void *tind, *p;
-	int retry;
-	
-	UFSD("ENTER: ino %lu\n", inode->i_ino);
-
-	retry = 0;
-	
-	tindirect_block = (DIRECT_BLOCK > (UFS_NDADDR + uspi->s_apb + uspi->s_2apb))
-		? ((DIRECT_BLOCK - UFS_NDADDR - uspi->s_apb - uspi->s_2apb) >> uspi->s_2apbshift) : 0;
-
-	p = ufs_get_direct_data_ptr(uspi, ufsi, UFS_TIND_BLOCK);
-	if (!(tmp = ufs_data_ptr_to_cpu(sb, p)))
-		return 0;
-	tind_bh = ubh_bread (sb, tmp, uspi->s_bsize);
-	if (tmp != ufs_data_ptr_to_cpu(sb, p)) {
-		ubh_brelse (tind_bh);
-		return 1;
-	}
-	if (!tind_bh) {
-		ufs_data_ptr_clear(uspi, p);
-		return 0;
-	}
-
-	for (i = tindirect_block ; i < uspi->s_apb ; i++) {
-		tind = ubh_get_data_ptr(uspi, tind_bh, i);
-		retry |= ufs_trunc_dindirect(inode, UFS_NDADDR + 
-			uspi->s_apb + ((i + 1) << uspi->s_2apbshift), tind);
-		ubh_mark_buffer_dirty(tind_bh);
-	}
-	for (i = 0; i < uspi->s_apb; i++)
-		if (!ufs_is_data_ptr_zero(uspi,
-					  ubh_get_data_ptr(uspi, tind_bh, i)))
-			break;
-	if (i >= uspi->s_apb) {
-		tmp = ufs_data_ptr_to_cpu(sb, p);
-		ufs_data_ptr_clear(uspi, p);
-
-		ufs_free_blocks(inode, tmp, uspi->s_fpb);
-		mark_inode_dirty(inode);
-		ubh_bforget(tind_bh);
-		tind_bh = NULL;
-	}
-	if (IS_SYNC(inode) && tind_bh && ubh_buffer_dirty(tind_bh))
-		ubh_sync_block(tind_bh);
-	ubh_brelse (tind_bh);
-	
-	UFSD("EXIT: ino %lu\n", inode->i_ino);
-	return retry;
-}
-
-static int ufs_alloc_lastblock(struct inode *inode)
-{
-	int err = 0;
-	struct super_block *sb = inode->i_sb;
-	struct address_space *mapping = inode->i_mapping;
-	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
-	unsigned i, end;
-	sector_t lastfrag;
-	struct page *lastpage;
-	struct buffer_head *bh;
-	u64 phys64;
-
-	lastfrag = (i_size_read(inode) + uspi->s_fsize - 1) >> uspi->s_fshift;
-
-	if (!lastfrag)
-		goto out;
-
-	lastfrag--;
-
-	lastpage = ufs_get_locked_page(mapping, lastfrag >>
-				       (PAGE_CACHE_SHIFT - inode->i_blkbits));
-       if (IS_ERR(lastpage)) {
-               err = -EIO;
-               goto out;
-       }
-
-       end = lastfrag & ((1 << (PAGE_CACHE_SHIFT - inode->i_blkbits)) - 1);
-       bh = page_buffers(lastpage);
-       for (i = 0; i < end; ++i)
-               bh = bh->b_this_page;
-
-
-       err = ufs_getfrag_block(inode, lastfrag, bh, 1);
-
-       if (unlikely(err))
-	       goto out_unlock;
-
-       if (buffer_new(bh)) {
-	       clear_buffer_new(bh);
-	       unmap_underlying_metadata(bh->b_bdev,
-					 bh->b_blocknr);
-	       /*
-		* we do not zeroize fragment, because of
-		* if it maped to hole, it already contains zeroes
-		*/
-	       set_buffer_uptodate(bh);
-	       mark_buffer_dirty(bh);
-	       set_page_dirty(lastpage);
-       }
-
-       if (lastfrag >= UFS_IND_FRAGMENT) {
-	       end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1;
-	       phys64 = bh->b_blocknr + 1;
-	       for (i = 0; i < end; ++i) {
-		       bh = sb_getblk(sb, i + phys64);
-		       lock_buffer(bh);
-		       memset(bh->b_data, 0, sb->s_blocksize);
-		       set_buffer_uptodate(bh);
-		       mark_buffer_dirty(bh);
-		       unlock_buffer(bh);
-		       sync_dirty_buffer(bh);
-		       brelse(bh);
-	       }
-       }
-out_unlock:
-       ufs_put_locked_page(lastpage);
-out:
-       return err;
-}
-
-int ufs_truncate(struct inode *inode, loff_t old_i_size)
-{
-	struct ufs_inode_info *ufsi = UFS_I(inode);
-	struct super_block *sb = inode->i_sb;
-	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
-	int retry, err = 0;
-	
-	UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n",
-	     inode->i_ino, (unsigned long long)i_size_read(inode),
-	     (unsigned long long)old_i_size);
-
-	if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
-	      S_ISLNK(inode->i_mode)))
-		return -EINVAL;
-	if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
-		return -EPERM;
-
-	err = ufs_alloc_lastblock(inode);
-
-	if (err) {
-		i_size_write(inode, old_i_size);
-		goto out;
-	}
-
-	block_truncate_page(inode->i_mapping, inode->i_size, ufs_getfrag_block);
-
-	while (1) {
-		retry = ufs_trunc_direct(inode);
-		retry |= ufs_trunc_indirect(inode, UFS_IND_BLOCK,
-					    ufs_get_direct_data_ptr(uspi, ufsi,
-								    UFS_IND_BLOCK));
-		retry |= ufs_trunc_dindirect(inode, UFS_IND_BLOCK + uspi->s_apb,
-					     ufs_get_direct_data_ptr(uspi, ufsi,
-								     UFS_DIND_BLOCK));
-		retry |= ufs_trunc_tindirect (inode);
-		if (!retry)
-			break;
-		if (IS_SYNC(inode) && (inode->i_state & I_DIRTY))
-			ufs_sync_inode (inode);
-		yield();
-	}
-
-	inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
-	ufsi->i_lastfrag = DIRECT_FRAGMENT;
-	mark_inode_dirty(inode);
-out:
-	UFSD("EXIT: err %d\n", err);
-	return err;
-}
-
-int ufs_setattr(struct dentry *dentry, struct iattr *attr)
-{
-	struct inode *inode = d_inode(dentry);
-	unsigned int ia_valid = attr->ia_valid;
-	int error;
-
-	error = inode_change_ok(inode, attr);
-	if (error)
-		return error;
-
-	if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) {
-		loff_t old_i_size = inode->i_size;
-
-		/* XXX(truncate): truncate_setsize should be called last */
-		truncate_setsize(inode, attr->ia_size);
-
-		lock_ufs(inode->i_sb);
-		error = ufs_truncate(inode, old_i_size);
-		unlock_ufs(inode->i_sb);
-		if (error)
-			return error;
-	}
-
-	setattr_copy(inode, attr);
-	mark_inode_dirty(inode);
-	return 0;
-}
-
-const struct inode_operations ufs_file_inode_operations = {
-	.setattr = ufs_setattr,
-};
diff --git a/kernel/fs/ufs/ufs.h b/kernel/fs/ufs/ufs.h
index cf6368d42..7da4aca86 100644
--- a/kernel/fs/ufs/ufs.h
+++ b/kernel/fs/ufs/ufs.h
@@ -24,8 +24,6 @@ struct ufs_sb_info {
 	unsigned s_cgno[UFS_MAX_GROUP_LOADED];
 	unsigned short s_cg_loaded;
 	unsigned s_mount_opt;
-	struct mutex mutex;
-	struct task_struct *mutex_owner;
 	struct super_block *sb;
 	int work_queued; /* non-zero if the delayed work is queued */
 	struct delayed_work sync_work; /* FS sync delayed work */
@@ -46,6 +44,8 @@ struct ufs_inode_info {
 	__u32	i_oeftflag;
 	__u16	i_osync;
 	__u64	i_lastfrag;
+	seqlock_t meta_lock;
+	struct mutex	truncate_mutex;
 	__u32   i_dir_start_lookup;
 	struct inode vfs_inode;
 };
@@ -106,7 +106,7 @@ extern int ufs_delete_entry(struct inode *, struct ufs_dir_entry *, struct page
 extern int ufs_empty_dir (struct inode *);
 extern struct ufs_dir_entry *ufs_dotdot(struct inode *, struct page **);
 extern void ufs_set_link(struct inode *dir, struct ufs_dir_entry *de,
-			 struct page *page, struct inode *inode);
+			 struct page *page, struct inode *inode, bool update_times);
 
 /* file.c */
 extern const struct inode_operations ufs_file_inode_operations;
@@ -122,7 +122,7 @@ extern struct inode *ufs_iget(struct super_block *, unsigned long);
 extern int ufs_write_inode (struct inode *, struct writeback_control *);
 extern int ufs_sync_inode (struct inode *);
 extern void ufs_evict_inode (struct inode *);
-extern int ufs_getfrag_block (struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create);
+extern int ufs_setattr(struct dentry *dentry, struct iattr *attr);
 
 /* namei.c */
 extern const struct file_operations ufs_dir_operations;
@@ -140,10 +140,6 @@ void ufs_mark_sb_dirty(struct super_block *sb);
 extern const struct inode_operations ufs_fast_symlink_inode_operations;
 extern const struct inode_operations ufs_symlink_inode_operations;
 
-/* truncate.c */
-extern int ufs_truncate (struct inode *, loff_t);
-extern int ufs_setattr(struct dentry *dentry, struct iattr *attr);
-
 static inline struct ufs_sb_info *UFS_SB(struct super_block *sb)
 {
 	return sb->s_fs_info;
@@ -170,7 +166,4 @@ static inline u32 ufs_dtogd(struct ufs_sb_private_info * uspi, u64 b)
 	return do_div(b, uspi->s_fpg);
 }
 
-extern void lock_ufs(struct super_block *sb);
-extern void unlock_ufs(struct super_block *sb);
-
 #endif /* _UFS_UFS_H */