Merge branch 'for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/git/nico/orion into fixes

16 files changed, 239 insertions, 79 deletions

diff --git a/fs/affs/affs.h b/fs/affs/affs.h
index d5bd497ab9cb..223b1917093e 100644
--- a/fs/affs/affs.h
+++ b/fs/affs/affs.h
@@ -48,7 +48,7 @@ struct affs_ext_key {
  * affs fs inode data in memory
  */
 struct affs_inode_info {
-	u32	 i_opencnt;
+	atomic_t i_opencnt;
 	struct semaphore i_link_lock;		/* Protects internal inode access. */
 	struct semaphore i_ext_lock;		/* Protects internal inode access. */
 #define i_hash_lock i_ext_lock
@@ -170,8 +170,6 @@ extern int	affs_rename(struct inode *old_dir, struct dentry *old_dentry,
 extern unsigned long		 affs_parent_ino(struct inode *dir);
 extern struct inode		*affs_new_inode(struct inode *dir);
 extern int			 affs_notify_change(struct dentry *dentry, struct iattr *attr);
-extern void			 affs_put_inode(struct inode *inode);
-extern void			 affs_drop_inode(struct inode *inode);
 extern void			 affs_delete_inode(struct inode *inode);
 extern void			 affs_clear_inode(struct inode *inode);
 extern struct inode		*affs_iget(struct super_block *sb,
diff --git a/fs/affs/file.c b/fs/affs/file.c
index 1a4f092f24ef..6eac7bdeec94 100644
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -48,8 +48,9 @@ affs_file_open(struct inode *inode, struct file *filp)
 {
 	if (atomic_read(&filp->f_count) != 1)
 		return 0;
-	pr_debug("AFFS: open(%d)\n", AFFS_I(inode)->i_opencnt);
-	AFFS_I(inode)->i_opencnt++;
+	pr_debug("AFFS: open(%lu,%d)\n",
+		 inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt));
+	atomic_inc(&AFFS_I(inode)->i_opencnt);
 	return 0;
 }
 
@@ -58,10 +59,16 @@ affs_file_release(struct inode *inode, struct file *filp)
 {
 	if (atomic_read(&filp->f_count) != 0)
 		return 0;
-	pr_debug("AFFS: release(%d)\n", AFFS_I(inode)->i_opencnt);
-	AFFS_I(inode)->i_opencnt--;
-	if (!AFFS_I(inode)->i_opencnt)
+	pr_debug("AFFS: release(%lu, %d)\n",
+		 inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt));
+
+	if (atomic_dec_and_test(&AFFS_I(inode)->i_opencnt)) {
+		mutex_lock(&inode->i_mutex);
+		if (inode->i_size != AFFS_I(inode)->mmu_private)
+			affs_truncate(inode);
 		affs_free_prealloc(inode);
+		mutex_unlock(&inode->i_mutex);
+	}
 
 	return 0;
 }
@@ -180,7 +187,7 @@ affs_get_extblock(struct inode *inode, u32 ext)
 	/* inline the simplest case: same extended block as last time */
 	struct buffer_head *bh = AFFS_I(inode)->i_ext_bh;
 	if (ext == AFFS_I(inode)->i_ext_last)
-		atomic_inc(&bh->b_count);
+		get_bh(bh);
 	else
 		/* we have to do more (not inlined) */
 		bh = affs_get_extblock_slow(inode, ext);
@@ -306,7 +313,7 @@ store_ext:
 	affs_brelse(AFFS_I(inode)->i_ext_bh);
 	AFFS_I(inode)->i_ext_last = ext;
 	AFFS_I(inode)->i_ext_bh = bh;
-	atomic_inc(&bh->b_count);
+	get_bh(bh);
 
 	return bh;
 
@@ -324,7 +331,6 @@ affs_get_block(struct inode *inode, sector_t block, struct buffer_head *bh_resul
 
 	pr_debug("AFFS: get_block(%u, %lu)\n", (u32)inode->i_ino, (unsigned long)block);
 
-
 	BUG_ON(block > (sector_t)0x7fffffffUL);
 
 	if (block >= AFFS_I(inode)->i_blkcnt) {
@@ -827,6 +833,8 @@ affs_truncate(struct inode *inode)
 		res = mapping->a_ops->write_begin(NULL, mapping, size, 0, 0, &page, &fsdata);
 		if (!res)
 			res = mapping->a_ops->write_end(NULL, mapping, size, 0, 0, page, fsdata);
+		else
+			inode->i_size = AFFS_I(inode)->mmu_private;
 		mark_inode_dirty(inode);
 		return;
 	} else if (inode->i_size == AFFS_I(inode)->mmu_private)
@@ -862,6 +870,7 @@ affs_truncate(struct inode *inode)
 		blk++;
 	} else
 		AFFS_HEAD(ext_bh)->first_data = 0;
+	AFFS_HEAD(ext_bh)->block_count = cpu_to_be32(i);
 	size = AFFS_SB(sb)->s_hashsize;
 	if (size > blkcnt - blk + i)
 		size = blkcnt - blk + i;
diff --git a/fs/affs/inode.c b/fs/affs/inode.c
index 27fe6cbe43ae..a13b334a3910 100644
--- a/fs/affs/inode.c
+++ b/fs/affs/inode.c
@@ -58,7 +58,7 @@ struct inode *affs_iget(struct super_block *sb, unsigned long ino)
 	AFFS_I(inode)->i_extcnt = 1;
 	AFFS_I(inode)->i_ext_last = ~1;
 	AFFS_I(inode)->i_protect = prot;
-	AFFS_I(inode)->i_opencnt = 0;
+	atomic_set(&AFFS_I(inode)->i_opencnt, 0);
 	AFFS_I(inode)->i_blkcnt = 0;
 	AFFS_I(inode)->i_lc = NULL;
 	AFFS_I(inode)->i_lc_size = 0;
@@ -108,8 +108,6 @@ struct inode *affs_iget(struct super_block *sb, unsigned long ino)
 			inode->i_mode |= S_IFDIR;
 		} else
 			inode->i_mode = S_IRUGO | S_IXUGO | S_IWUSR | S_IFDIR;
-		if (tail->link_chain)
-			inode->i_nlink = 2;
 		/* Maybe it should be controlled by mount parameter? */
 		//inode->i_mode |= S_ISVTX;
 		inode->i_op = &affs_dir_inode_operations;
@@ -245,31 +243,12 @@ out:
 }
 
 void
-affs_put_inode(struct inode *inode)
-{
-	pr_debug("AFFS: put_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
-	affs_free_prealloc(inode);
-}
-
-void
-affs_drop_inode(struct inode *inode)
-{
-	mutex_lock(&inode->i_mutex);
-	if (inode->i_size != AFFS_I(inode)->mmu_private)
-		affs_truncate(inode);
-	mutex_unlock(&inode->i_mutex);
-
-	generic_drop_inode(inode);
-}
-
-void
 affs_delete_inode(struct inode *inode)
 {
 	pr_debug("AFFS: delete_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
 	truncate_inode_pages(&inode->i_data, 0);
 	inode->i_size = 0;
-	if (S_ISREG(inode->i_mode))
-		affs_truncate(inode);
+	affs_truncate(inode);
 	clear_inode(inode);
 	affs_free_block(inode->i_sb, inode->i_ino);
 }
@@ -277,9 +256,12 @@ affs_delete_inode(struct inode *inode)
 void
 affs_clear_inode(struct inode *inode)
 {
-	unsigned long cache_page = (unsigned long) AFFS_I(inode)->i_lc;
+	unsigned long cache_page;
 
 	pr_debug("AFFS: clear_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
+
+	affs_free_prealloc(inode);
+	cache_page = (unsigned long)AFFS_I(inode)->i_lc;
 	if (cache_page) {
 		pr_debug("AFFS: freeing ext cache\n");
 		AFFS_I(inode)->i_lc = NULL;
@@ -316,7 +298,7 @@ affs_new_inode(struct inode *dir)
 	inode->i_ino     = block;
 	inode->i_nlink   = 1;
 	inode->i_mtime   = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
-	AFFS_I(inode)->i_opencnt = 0;
+	atomic_set(&AFFS_I(inode)->i_opencnt, 0);
 	AFFS_I(inode)->i_blkcnt = 0;
 	AFFS_I(inode)->i_lc = NULL;
 	AFFS_I(inode)->i_lc_size = 0;
@@ -369,12 +351,12 @@ affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s3
 	switch (type) {
 	case ST_LINKFILE:
 	case ST_LINKDIR:
-		inode_bh = bh;
 		retval = -ENOSPC;
 		block = affs_alloc_block(dir, dir->i_ino);
 		if (!block)
 			goto err;
 		retval = -EIO;
+		inode_bh = bh;
 		bh = affs_getzeroblk(sb, block);
 		if (!bh)
 			goto err;
diff --git a/fs/affs/namei.c b/fs/affs/namei.c
index 2218f1ee71ce..cfcf1b6cf82b 100644
--- a/fs/affs/namei.c
+++ b/fs/affs/namei.c
@@ -234,7 +234,8 @@ affs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
 int
 affs_unlink(struct inode *dir, struct dentry *dentry)
 {
-	pr_debug("AFFS: unlink(dir=%d, \"%.*s\")\n", (u32)dir->i_ino,
+	pr_debug("AFFS: unlink(dir=%d, %lu \"%.*s\")\n", (u32)dir->i_ino,
+		 dentry->d_inode->i_ino,
 		 (int)dentry->d_name.len, dentry->d_name.name);
 
 	return affs_remove_header(dentry);
@@ -302,7 +303,8 @@ affs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 int
 affs_rmdir(struct inode *dir, struct dentry *dentry)
 {
-	pr_debug("AFFS: rmdir(dir=%u, \"%.*s\")\n", (u32)dir->i_ino,
+	pr_debug("AFFS: rmdir(dir=%u, %lu \"%.*s\")\n", (u32)dir->i_ino,
+		 dentry->d_inode->i_ino,
 		 (int)dentry->d_name.len, dentry->d_name.name);
 
 	return affs_remove_header(dentry);
diff --git a/fs/affs/super.c b/fs/affs/super.c
index 01d25d532541..d214837d5e42 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -71,12 +71,18 @@ static struct kmem_cache * affs_inode_cachep;
 
 static struct inode *affs_alloc_inode(struct super_block *sb)
 {
-	struct affs_inode_info *ei;
-	ei = (struct affs_inode_info *)kmem_cache_alloc(affs_inode_cachep, GFP_KERNEL);
-	if (!ei)
+	struct affs_inode_info *i;
+
+	i = kmem_cache_alloc(affs_inode_cachep, GFP_KERNEL);
+	if (!i)
 		return NULL;
-	ei->vfs_inode.i_version = 1;
-	return &ei->vfs_inode;
+
+	i->vfs_inode.i_version = 1;
+	i->i_lc = NULL;
+	i->i_ext_bh = NULL;
+	i->i_pa_cnt = 0;
+
+	return &i->vfs_inode;
 }
 
 static void affs_destroy_inode(struct inode *inode)
@@ -114,8 +120,6 @@ static const struct super_operations affs_sops = {
 	.alloc_inode	= affs_alloc_inode,
 	.destroy_inode	= affs_destroy_inode,
 	.write_inode	= affs_write_inode,
-	.put_inode	= affs_put_inode,
-	.drop_inode	= affs_drop_inode,
 	.delete_inode	= affs_delete_inode,
 	.clear_inode	= affs_clear_inode,
 	.put_super	= affs_put_super,
diff --git a/fs/bio.c b/fs/bio.c
index 799f86deff24..78562574cb52 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -158,7 +158,7 @@ struct bio *bio_alloc_bioset(gfp_t gfp_mask, int nr_iovecs, struct bio_set *bs)
 
 		bio_init(bio);
 		if (likely(nr_iovecs)) {
-			unsigned long idx = 0; /* shut up gcc */
+			unsigned long uninitialized_var(idx);
 
 			bvl = bvec_alloc_bs(gfp_mask, nr_iovecs, &idx, bs);
 			if (unlikely(!bvl)) {
@@ -963,6 +963,7 @@ static void bio_copy_kern_endio(struct bio *bio, int err)
  *	@data: pointer to buffer to copy
  *	@len: length in bytes
  *	@gfp_mask: allocation flags for bio and page allocation
+ *	@reading: data direction is READ
  *
  *	copy the kernel address into a bio suitable for io to a block
  *	device. Returns an error pointer in case of error.
diff --git a/fs/inode.c b/fs/inode.c
index bf6478130424..c36d9480335c 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -1149,13 +1149,8 @@ static inline void iput_final(struct inode *inode)
 void iput(struct inode *inode)
 {
 	if (inode) {
-		const struct super_operations *op = inode->i_sb->s_op;
-
 		BUG_ON(inode->i_state == I_CLEAR);
 
-		if (op && op->put_inode)
-			op->put_inode(inode);
-
 		if (atomic_dec_and_lock(&inode->i_count, &inode_lock))
 			iput_final(inode);
 	}
diff --git a/fs/locks.c b/fs/locks.c
index 663c069b59b3..0ac6b92cb0b6 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -1753,6 +1753,7 @@ int fcntl_setlk(unsigned int fd, struct file *filp, unsigned int cmd,
 	struct file_lock *file_lock = locks_alloc_lock();
 	struct flock flock;
 	struct inode *inode;
+	struct file *f;
 	int error;
 
 	if (file_lock == NULL)
@@ -1825,7 +1826,15 @@ again:
 	 * Attempt to detect a close/fcntl race and recover by
 	 * releasing the lock that was just acquired.
 	 */
-	if (!error && fcheck(fd) != filp && flock.l_type != F_UNLCK) {
+	/*
+	 * we need that spin_lock here - it prevents reordering between
+	 * update of inode->i_flock and check for it done in close().
+	 * rcu_read_lock() wouldn't do.
+	 */
+	spin_lock(&current->files->file_lock);
+	f = fcheck(fd);
+	spin_unlock(&current->files->file_lock);
+	if (!error && f != filp && flock.l_type != F_UNLCK) {
 		flock.l_type = F_UNLCK;
 		goto again;
 	}
@@ -1881,6 +1890,7 @@ int fcntl_setlk64(unsigned int fd, struct file *filp, unsigned int cmd,
 	struct file_lock *file_lock = locks_alloc_lock();
 	struct flock64 flock;
 	struct inode *inode;
+	struct file *f;
 	int error;
 
 	if (file_lock == NULL)
@@ -1953,7 +1963,10 @@ again:
 	 * Attempt to detect a close/fcntl race and recover by
 	 * releasing the lock that was just acquired.
 	 */
-	if (!error && fcheck(fd) != filp && flock.l_type != F_UNLCK) {
+	spin_lock(&current->files->file_lock);
+	f = fcheck(fd);
+	spin_unlock(&current->files->file_lock);
+	if (!error && f != filp && flock.l_type != F_UNLCK) {
 		flock.l_type = F_UNLCK;
 		goto again;
 	}
diff --git a/fs/pipe.c b/fs/pipe.c
index f73492b6817e..ec228bc9f882 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -17,6 +17,7 @@
 #include <linux/highmem.h>
 #include <linux/pagemap.h>
 #include <linux/audit.h>
+#include <linux/syscalls.h>
 
 #include <asm/uaccess.h>
 #include <asm/ioctls.h>
@@ -1076,6 +1077,26 @@ int do_pipe(int *fd)
 }
 
 /*
+ * sys_pipe() is the normal C calling standard for creating
+ * a pipe. It's not the way Unix traditionally does this, though.
+ */
+asmlinkage long __weak sys_pipe(int __user *fildes)
+{
+	int fd[2];
+	int error;
+
+	error = do_pipe(fd);
+	if (!error) {
+		if (copy_to_user(fildes, fd, sizeof(fd))) {
+			sys_close(fd[0]);
+			sys_close(fd[1]);
+			error = -EFAULT;
+		}
+	}
+	return error;
+}
+
+/*
  * pipefs should _never_ be mounted by userland - too much of security hassle,
  * no real gain from having the whole whorehouse mounted. So we don't need
  * any operations on the root directory. However, we need a non-trivial
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index e2b8e769f510..88717c0f941b 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -5,11 +5,9 @@
 #include <linux/highmem.h>
 #include <linux/ptrace.h>
 #include <linux/pagemap.h>
-#include <linux/ptrace.h>
 #include <linux/mempolicy.h>
 #include <linux/swap.h>
 #include <linux/swapops.h>
-#include <linux/seq_file.h>
 
 #include <asm/elf.h>
 #include <asm/uaccess.h>
diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
index 4b733f108455..4b4f9cc2f186 100644
--- a/fs/proc/task_nommu.c
+++ b/fs/proc/task_nommu.c
@@ -1,6 +1,7 @@
 
 #include <linux/mm.h>
 #include <linux/file.h>
+#include <linux/fdtable.h>
 #include <linux/mount.h>
 #include <linux/ptrace.h>
 #include <linux/seq_file.h>
diff --git a/fs/splice.c b/fs/splice.c
index 633f58ebfb72..78150038b584 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -811,24 +811,19 @@ generic_file_splice_write(struct pipe_inode_info *pipe, struct file *out,
 {
 	struct address_space *mapping = out->f_mapping;
 	struct inode *inode = mapping->host;
-	int killsuid, killpriv;
+	struct splice_desc sd = {
+		.total_len = len,
+		.flags = flags,
+		.pos = *ppos,
+		.u.file = out,
+	};
 	ssize_t ret;
-	int err = 0;
-
-	killpriv = security_inode_need_killpriv(out->f_path.dentry);
-	killsuid = should_remove_suid(out->f_path.dentry);
-	if (unlikely(killsuid || killpriv)) {
-		mutex_lock(&inode->i_mutex);
-		if (killpriv)
-			err = security_inode_killpriv(out->f_path.dentry);
-		if (!err && killsuid)
-			err = __remove_suid(out->f_path.dentry, killsuid);
-		mutex_unlock(&inode->i_mutex);
-		if (err)
-			return err;
-	}
 
-	ret = splice_from_pipe(pipe, out, ppos, len, flags, pipe_to_file);
+	inode_double_lock(inode, pipe->inode);
+	ret = remove_suid(out->f_path.dentry);
+	if (likely(!ret))
+		ret = __splice_from_pipe(pipe, &sd, pipe_to_file);
+	inode_double_unlock(inode, pipe->inode);
 	if (ret > 0) {
 		unsigned long nr_pages;
 
@@ -840,6 +835,8 @@ generic_file_splice_write(struct pipe_inode_info *pipe, struct file *out,
 		 * sync it.
 		 */
 		if (unlikely((out->f_flags & O_SYNC) || IS_SYNC(inode))) {
+			int err;
+
 			mutex_lock(&inode->i_mutex);
 			err = generic_osync_inode(inode, mapping,
 						  OSYNC_METADATA|OSYNC_DATA);
@@ -1075,7 +1072,7 @@ long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,
 
 	ret = splice_direct_to_actor(in, &sd, direct_splice_actor);
 	if (ret > 0)
-		*ppos = sd.pos;
+		*ppos += ret;
 
 	return ret;
 }
diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index 2b34c8ca6c83..d3231947db19 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -32,6 +32,7 @@
 #include <linux/buffer_head.h>
 #include <linux/sched.h>
 #include <linux/crc-itu-t.h>
+#include <linux/exportfs.h>
 
 static inline int udf_match(int len1, const char *name1, int len2,
 			    const char *name2)
@@ -158,6 +159,8 @@ static struct fileIdentDesc *udf_find_entry(struct inode *dir,
 	sector_t offset;
 	struct extent_position epos = {};
 	struct udf_inode_info *dinfo = UDF_I(dir);
+	int isdotdot = dentry->d_name.len == 2 &&
+		dentry->d_name.name[0] == '.' && dentry->d_name.name[1] == '.';
 
 	size = udf_ext0_offset(dir) + dir->i_size;
 	f_pos = udf_ext0_offset(dir);
@@ -225,6 +228,12 @@ static struct fileIdentDesc *udf_find_entry(struct inode *dir,
 				continue;
 		}
 
+		if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) &&
+		    isdotdot) {
+			brelse(epos.bh);
+			return fi;
+		}
+
 		if (!lfi)
 			continue;
 
@@ -286,9 +295,8 @@ static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
 		}
 	}
 	unlock_kernel();
-	d_add(dentry, inode);
 
-	return NULL;
+	return d_splice_alias(inode, dentry);
 }
 
 static struct fileIdentDesc *udf_add_entry(struct inode *dir,
@@ -307,7 +315,7 @@ static struct fileIdentDesc *udf_add_entry(struct inode *dir,
 	uint16_t liu;
 	int block;
 	kernel_lb_addr eloc;
-	uint32_t elen;
+	uint32_t elen = 0;
 	sector_t offset;
 	struct extent_position epos = {};
 	struct udf_inode_info *dinfo;
@@ -398,7 +406,8 @@ static struct fileIdentDesc *udf_add_entry(struct inode *dir,
 	}
 
 add:
-	if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
+	/* Is there any extent whose size we need to round up? */
+	if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB && elen) {
 		elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1);
 		if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
 			epos.offset -= sizeof(short_ad);
@@ -1232,6 +1241,134 @@ end_rename:
 	return retval;
 }
 
+static struct dentry *udf_get_parent(struct dentry *child)
+{
+	struct dentry *parent;
+	struct inode *inode = NULL;
+	struct dentry dotdot;
+	struct fileIdentDesc cfi;
+	struct udf_fileident_bh fibh;
+
+	dotdot.d_name.name = "..";
+	dotdot.d_name.len = 2;
+
+	lock_kernel();
+	if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi))
+		goto out_unlock;
+
+	if (fibh.sbh != fibh.ebh)
+		brelse(fibh.ebh);
+	brelse(fibh.sbh);
+
+	inode = udf_iget(child->d_inode->i_sb,
+			 lelb_to_cpu(cfi.icb.extLocation));
+	if (!inode)
+		goto out_unlock;
+	unlock_kernel();
+
+	parent = d_alloc_anon(inode);
+	if (!parent) {
+		iput(inode);
+		parent = ERR_PTR(-ENOMEM);
+	}
+
+	return parent;
+out_unlock:
+	unlock_kernel();
+	return ERR_PTR(-EACCES);
+}
+
+
+static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block,
+					u16 partref, __u32 generation)
+{
+	struct inode *inode;
+	struct dentry *result;
+	kernel_lb_addr loc;
+
+	if (block == 0)
+		return ERR_PTR(-ESTALE);
+
+	loc.logicalBlockNum = block;
+	loc.partitionReferenceNum = partref;
+	inode = udf_iget(sb, loc);
+
+	if (inode == NULL)
+		return ERR_PTR(-ENOMEM);
+
+	if (generation && inode->i_generation != generation) {
+		iput(inode);
+		return ERR_PTR(-ESTALE);
+	}
+	result = d_alloc_anon(inode);
+	if (!result) {
+		iput(inode);
+		return ERR_PTR(-ENOMEM);
+	}
+	return result;
+}
+
+static struct dentry *udf_fh_to_dentry(struct super_block *sb,
+				       struct fid *fid, int fh_len, int fh_type)
+{
+	if ((fh_len != 3 && fh_len != 5) ||
+	    (fh_type != FILEID_UDF_WITH_PARENT &&
+	     fh_type != FILEID_UDF_WITHOUT_PARENT))
+		return NULL;
+
+	return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref,
+			fid->udf.generation);
+}
+
+static struct dentry *udf_fh_to_parent(struct super_block *sb,
+				       struct fid *fid, int fh_len, int fh_type)
+{
+	if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT)
+		return NULL;
+
+	return udf_nfs_get_inode(sb, fid->udf.parent_block,
+				 fid->udf.parent_partref,
+				 fid->udf.parent_generation);
+}
+static int udf_encode_fh(struct dentry *de, __u32 *fh, int *lenp,
+			 int connectable)
+{
+	int len = *lenp;
+	struct inode *inode =  de->d_inode;
+	kernel_lb_addr location = UDF_I(inode)->i_location;
+	struct fid *fid = (struct fid *)fh;
+	int type = FILEID_UDF_WITHOUT_PARENT;
+
+	if (len < 3 || (connectable && len < 5))
+		return 255;
+
+	*lenp = 3;
+	fid->udf.block = location.logicalBlockNum;
+	fid->udf.partref = location.partitionReferenceNum;
+	fid->udf.generation = inode->i_generation;
+
+	if (connectable && !S_ISDIR(inode->i_mode)) {
+		spin_lock(&de->d_lock);
+		inode = de->d_parent->d_inode;
+		location = UDF_I(inode)->i_location;
+		fid->udf.parent_block = location.logicalBlockNum;
+		fid->udf.parent_partref = location.partitionReferenceNum;
+		fid->udf.parent_generation = inode->i_generation;
+		spin_unlock(&de->d_lock);
+		*lenp = 5;
+		type = FILEID_UDF_WITH_PARENT;
+	}
+
+	return type;
+}
+
+const struct export_operations udf_export_ops = {
+	.encode_fh	= udf_encode_fh,
+	.fh_to_dentry   = udf_fh_to_dentry,
+	.fh_to_parent   = udf_fh_to_parent,
+	.get_parent     = udf_get_parent,
+};
+
 const struct inode_operations udf_dir_inode_operations = {
 	.lookup				= udf_lookup,
 	.create				= udf_create,
diff --git a/fs/udf/partition.c b/fs/udf/partition.c
index 63610f026ae1..96dfd207c3d6 100644
--- a/fs/udf/partition.c
+++ b/fs/udf/partition.c
@@ -27,8 +27,8 @@
 #include <linux/slab.h>
 #include <linux/buffer_head.h>
 
-inline uint32_t udf_get_pblock(struct super_block *sb, uint32_t block,
-			       uint16_t partition, uint32_t offset)
+uint32_t udf_get_pblock(struct super_block *sb, uint32_t block,
+			uint16_t partition, uint32_t offset)
 {
 	struct udf_sb_info *sbi = UDF_SB(sb);
 	struct udf_part_map *map;
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 9fb18a340fc1..7a5f69be6ac2 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1933,6 +1933,7 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
 
 	/* Fill in the rest of the superblock */
 	sb->s_op = &udf_sb_ops;
+	sb->s_export_op = &udf_export_ops;
 	sb->dq_op = NULL;
 	sb->s_dirt = 0;
 	sb->s_magic = UDF_SUPER_MAGIC;
diff --git a/fs/udf/udfdecl.h b/fs/udf/udfdecl.h
index f3f45d029277..8fa9c2d70911 100644
--- a/fs/udf/udfdecl.h
+++ b/fs/udf/udfdecl.h
@@ -73,6 +73,7 @@ struct task_struct;
 struct buffer_head;
 struct super_block;
 
+extern const struct export_operations udf_export_ops;
 extern const struct inode_operations udf_dir_inode_operations;
 extern const struct file_operations udf_dir_operations;
 extern const struct inode_operations udf_file_inode_operations;