Merge ../linus

14 files changed, 268 insertions, 130 deletions

diff --git a/fs/xfs/linux-2.6/mrlock.h b/fs/xfs/linux-2.6/mrlock.h
index 16b44c3c2362..1b262b790d9c 100644
--- a/fs/xfs/linux-2.6/mrlock.h
+++ b/fs/xfs/linux-2.6/mrlock.h
@@ -79,7 +79,7 @@ static inline void mrdemote(mrlock_t *mrp)
  * Debug-only routine, without some platform-specific asm code, we can
  * now only answer requests regarding whether we hold the lock for write
  * (reader state is outside our visibility, we only track writer state).
- * Note: means !ismrlocked would give false positivies, so don't do that.
+ * Note: means !ismrlocked would give false positives, so don't do that.
  */
 static inline int ismrlocked(mrlock_t *mrp, int type)
 {
diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index c02f7c5b7462..4d191ef39b67 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -372,7 +372,7 @@ static inline int bio_add_buffer(struct bio *bio, struct buffer_head *bh)
  * assumes that all buffers on the page are started at the same time.
  *
  * The fix is two passes across the ioend list - one to start writeback on the
- * bufferheads, and then the second one submit them for I/O.
+ * buffer_heads, and then submit them for I/O on the second pass.
  */
 STATIC void
 xfs_submit_ioend(
@@ -699,7 +699,7 @@ xfs_convert_page(
 
 	/*
 	 * page_dirty is initially a count of buffers on the page before
-	 * EOF and is decrememted as we move each into a cleanable state.
+	 * EOF and is decremented as we move each into a cleanable state.
 	 *
 	 * Derivation:
 	 *
@@ -842,7 +842,7 @@ xfs_cluster_write(
  * page if possible.
  * The bh->b_state's cannot know if any of the blocks or which block for
  * that matter are dirty due to mmap writes, and therefore bh uptodate is
- * only vaild if the page itself isn't completely uptodate.  Some layers
+ * only valid if the page itself isn't completely uptodate.  Some layers
  * may clear the page dirty flag prior to calling write page, under the
  * assumption the entire page will be written out; by not writing out the
  * whole page the page can be reused before all valid dirty data is
@@ -870,12 +870,14 @@ xfs_page_state_convert(
 	pgoff_t                 end_index, last_index, tlast;
 	ssize_t			size, len;
 	int			flags, err, iomap_valid = 0, uptodate = 1;
-	int			page_dirty, count = 0, trylock_flag = 0;
+	int			page_dirty, count = 0;
+	int			trylock = 0;
 	int			all_bh = unmapped;
 
-	/* wait for other IO threads? */
-	if (startio && (wbc->sync_mode == WB_SYNC_NONE && wbc->nonblocking))
-		trylock_flag |= BMAPI_TRYLOCK;
+	if (startio) {
+		if (wbc->sync_mode == WB_SYNC_NONE && wbc->nonblocking)
+			trylock |= BMAPI_TRYLOCK;
+	}
 
 	/* Is this page beyond the end of the file? */
 	offset = i_size_read(inode);
@@ -892,7 +894,7 @@ xfs_page_state_convert(
 
 	/*
 	 * page_dirty is initially a count of buffers on the page before
-	 * EOF and is decrememted as we move each into a cleanable state.
+	 * EOF and is decremented as we move each into a cleanable state.
 	 *
 	 * Derivation:
 	 *
@@ -956,15 +958,13 @@ xfs_page_state_convert(
 
 			if (buffer_unwritten(bh)) {
 				type = IOMAP_UNWRITTEN;
-				flags = BMAPI_WRITE|BMAPI_IGNSTATE;
+				flags = BMAPI_WRITE | BMAPI_IGNSTATE;
 			} else if (buffer_delay(bh)) {
 				type = IOMAP_DELAY;
-				flags = BMAPI_ALLOCATE;
-				if (!startio)
-					flags |= trylock_flag;
+				flags = BMAPI_ALLOCATE | trylock;
 			} else {
 				type = IOMAP_NEW;
-				flags = BMAPI_WRITE|BMAPI_MMAP;
+				flags = BMAPI_WRITE | BMAPI_MMAP;
 			}
 
 			if (!iomap_valid) {
@@ -1223,10 +1223,9 @@ free_buffers:
 }
 
 STATIC int
-__xfs_get_block(
+__xfs_get_blocks(
 	struct inode		*inode,
 	sector_t		iblock,
-	unsigned long		blocks,
 	struct buffer_head	*bh_result,
 	int			create,
 	int			direct,
@@ -1236,22 +1235,17 @@ __xfs_get_block(
 	xfs_iomap_t		iomap;
 	xfs_off_t		offset;
 	ssize_t			size;
-	int			retpbbm = 1;
+	int			niomap = 1;
 	int			error;
 
 	offset = (xfs_off_t)iblock << inode->i_blkbits;
-	if (blocks)
-		size = (ssize_t) min_t(xfs_off_t, LONG_MAX,
-					(xfs_off_t)blocks << inode->i_blkbits);
-	else
-		size = 1 << inode->i_blkbits;
-
+	ASSERT(bh_result->b_size >= (1 << inode->i_blkbits));
+	size = bh_result->b_size;
 	VOP_BMAP(vp, offset, size,
-		create ? flags : BMAPI_READ, &iomap, &retpbbm, error);
+		create ? flags : BMAPI_READ, &iomap, &niomap, error);
 	if (error)
 		return -error;
-
-	if (retpbbm == 0)
+	if (niomap == 0)
 		return 0;
 
 	if (iomap.iomap_bn != IOMAP_DADDR_NULL) {
@@ -1271,12 +1265,16 @@ __xfs_get_block(
 		}
 	}
 
-	/* If this is a realtime file, data might be on a new device */
+	/*
+	 * If this is a realtime file, data may be on a different device.
+	 * to that pointed to from the buffer_head b_bdev currently.
+	 */
 	bh_result->b_bdev = iomap.iomap_target->bt_bdev;
 
-	/* If we previously allocated a block out beyond eof and
-	 * we are now coming back to use it then we will need to
-	 * flag it as new even if it has a disk address.
+	/*
+	 * If we previously allocated a block out beyond eof and we are
+	 * now coming back to use it then we will need to flag it as new
+	 * even if it has a disk address.
 	 */
 	if (create &&
 	    ((!buffer_mapped(bh_result) && !buffer_uptodate(bh_result)) ||
@@ -1292,26 +1290,24 @@ __xfs_get_block(
 		}
 	}
 
-	if (blocks) {
+	if (direct || size > (1 << inode->i_blkbits)) {
 		ASSERT(iomap.iomap_bsize - iomap.iomap_delta > 0);
 		offset = min_t(xfs_off_t,
-				iomap.iomap_bsize - iomap.iomap_delta,
-				(xfs_off_t)blocks << inode->i_blkbits);
-		bh_result->b_size = (u32) min_t(xfs_off_t, UINT_MAX, offset);
+				iomap.iomap_bsize - iomap.iomap_delta, size);
+		bh_result->b_size = (ssize_t)min_t(xfs_off_t, LONG_MAX, offset);
 	}
 
 	return 0;
 }
 
 int
-xfs_get_block(
+xfs_get_blocks(
 	struct inode		*inode,
 	sector_t		iblock,
 	struct buffer_head	*bh_result,
 	int			create)
 {
-	return __xfs_get_block(inode, iblock,
-				bh_result->b_size >> inode->i_blkbits,
+	return __xfs_get_blocks(inode, iblock,
 				bh_result, create, 0, BMAPI_WRITE);
 }
 
@@ -1322,8 +1318,7 @@ xfs_get_blocks_direct(
 	struct buffer_head	*bh_result,
 	int			create)
 {
-	return __xfs_get_block(inode, iblock,
-				bh_result->b_size >> inode->i_blkbits,
+	return __xfs_get_blocks(inode, iblock,
 				bh_result, create, 1, BMAPI_WRITE|BMAPI_DIRECT);
 }
 
@@ -1339,9 +1334,9 @@ xfs_end_io_direct(
 	/*
 	 * Non-NULL private data means we need to issue a transaction to
 	 * convert a range from unwritten to written extents.  This needs
-	 * to happen from process contect but aio+dio I/O completion
+	 * to happen from process context but aio+dio I/O completion
 	 * happens from irq context so we need to defer it to a workqueue.
-	 * This is not nessecary for synchronous direct I/O, but we do
+	 * This is not necessary for synchronous direct I/O, but we do
 	 * it anyway to keep the code uniform and simpler.
 	 *
 	 * The core direct I/O code might be changed to always call the
@@ -1358,7 +1353,7 @@ xfs_end_io_direct(
 	}
 
 	/*
-	 * blockdev_direct_IO can return an error even afer the I/O
+	 * blockdev_direct_IO can return an error even after the I/O
 	 * completion handler was called.  Thus we need to protect
 	 * against double-freeing.
 	 */
@@ -1405,7 +1400,7 @@ xfs_vm_prepare_write(
 	unsigned int		from,
 	unsigned int		to)
 {
-	return block_prepare_write(page, from, to, xfs_get_block);
+	return block_prepare_write(page, from, to, xfs_get_blocks);
 }
 
 STATIC sector_t
@@ -1422,7 +1417,7 @@ xfs_vm_bmap(
 	VOP_RWLOCK(vp, VRWLOCK_READ);
 	VOP_FLUSH_PAGES(vp, (xfs_off_t)0, -1, 0, FI_REMAPF, error);
 	VOP_RWUNLOCK(vp, VRWLOCK_READ);
-	return generic_block_bmap(mapping, block, xfs_get_block);
+	return generic_block_bmap(mapping, block, xfs_get_blocks);
 }
 
 STATIC int
@@ -1430,7 +1425,7 @@ xfs_vm_readpage(
 	struct file		*unused,
 	struct page		*page)
 {
-	return mpage_readpage(page, xfs_get_block);
+	return mpage_readpage(page, xfs_get_blocks);
 }
 
 STATIC int
@@ -1440,7 +1435,7 @@ xfs_vm_readpages(
 	struct list_head	*pages,
 	unsigned		nr_pages)
 {
-	return mpage_readpages(mapping, pages, nr_pages, xfs_get_block);
+	return mpage_readpages(mapping, pages, nr_pages, xfs_get_blocks);
 }
 
 STATIC void
diff --git a/fs/xfs/linux-2.6/xfs_aops.h b/fs/xfs/linux-2.6/xfs_aops.h
index 795699f121d2..60716543c68b 100644
--- a/fs/xfs/linux-2.6/xfs_aops.h
+++ b/fs/xfs/linux-2.6/xfs_aops.h
@@ -41,6 +41,6 @@ typedef struct xfs_ioend {
 } xfs_ioend_t;
 
 extern struct address_space_operations xfs_address_space_operations;
-extern int xfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
+extern int xfs_get_blocks(struct inode *, sector_t, struct buffer_head *, int);
 
 #endif /* __XFS_IOPS_H__ */
diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c
index 9fb0312665ca..26fed0756f01 100644
--- a/fs/xfs/linux-2.6/xfs_buf.c
+++ b/fs/xfs/linux-2.6/xfs_buf.c
@@ -182,7 +182,7 @@ free_address(
 {
 	a_list_t	*aentry;
 
-	aentry = kmalloc(sizeof(a_list_t), GFP_ATOMIC & ~__GFP_HIGH);
+	aentry = kmalloc(sizeof(a_list_t), GFP_NOWAIT);
 	if (likely(aentry)) {
 		spin_lock(&as_lock);
 		aentry->next = as_free_head;
diff --git a/fs/xfs/linux-2.6/xfs_export.h b/fs/xfs/linux-2.6/xfs_export.h
index e5b0559700a4..e794ca4efc76 100644
--- a/fs/xfs/linux-2.6/xfs_export.h
+++ b/fs/xfs/linux-2.6/xfs_export.h
@@ -54,7 +54,7 @@
  * Note, the NFS filehandle also includes an fsid portion which
  * may have an inode number in it.  That number is hardcoded to
  * 32bits and there is no way for XFS to intercept it.  In
- * practice this means when exporting an XFS filesytem with 64bit
+ * practice this means when exporting an XFS filesystem with 64bit
  * inodes you should either export the mountpoint (rather than
  * a subdirectory) or use the "fsid" export option.
  */
diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c
index 85997b1205f5..c847416f6d10 100644
--- a/fs/xfs/linux-2.6/xfs_file.c
+++ b/fs/xfs/linux-2.6/xfs_file.c
@@ -69,7 +69,6 @@ __xfs_file_read(
 	return rval;
 }
 
-
 STATIC ssize_t
 xfs_file_aio_read(
 	struct kiocb		*iocb,
@@ -90,7 +89,6 @@ xfs_file_aio_read_invis(
 	return __xfs_file_read(iocb, buf, IO_ISAIO|IO_INVIS, count, pos);
 }
 
-
 STATIC inline ssize_t
 __xfs_file_write(
 	struct kiocb	*iocb,
@@ -113,7 +111,6 @@ __xfs_file_write(
 	return rval;
 }
 
-
 STATIC ssize_t
 xfs_file_aio_write(
 	struct kiocb		*iocb,
@@ -134,7 +131,6 @@ xfs_file_aio_write_invis(
 	return __xfs_file_write(iocb, buf, IO_ISAIO|IO_INVIS, count, pos);
 }
 
-
 STATIC inline ssize_t
 __xfs_file_readv(
 	struct file		*file,
@@ -179,7 +175,6 @@ xfs_file_readv_invis(
 	return __xfs_file_readv(file, iov, IO_INVIS, nr_segs, ppos);
 }
 
-
 STATIC inline ssize_t
 __xfs_file_writev(
 	struct file		*file,
@@ -204,7 +199,6 @@ __xfs_file_writev(
 	return rval;
 }
 
-
 STATIC ssize_t
 xfs_file_writev(
 	struct file		*file,
@@ -228,7 +222,7 @@ xfs_file_writev_invis(
 STATIC ssize_t
 xfs_file_sendfile(
 	struct file		*filp,
-	loff_t			*ppos,
+	loff_t			*pos,
 	size_t			count,
 	read_actor_t		actor,
 	void			*target)
@@ -236,10 +230,84 @@ xfs_file_sendfile(
 	vnode_t			*vp = vn_from_inode(filp->f_dentry->d_inode);
 	ssize_t			rval;
 
-	VOP_SENDFILE(vp, filp, ppos, 0, count, actor, target, NULL, rval);
+	VOP_SENDFILE(vp, filp, pos, 0, count, actor, target, NULL, rval);
+	return rval;
+}
+
+STATIC ssize_t
+xfs_file_sendfile_invis(
+	struct file		*filp,
+	loff_t			*pos,
+	size_t			count,
+	read_actor_t		actor,
+	void			*target)
+{
+	vnode_t			*vp = vn_from_inode(filp->f_dentry->d_inode);
+	ssize_t			rval;
+
+	VOP_SENDFILE(vp, filp, pos, IO_INVIS, count, actor, target, NULL, rval);
+	return rval;
+}
+
+STATIC ssize_t
+xfs_file_splice_read(
+	struct file		*infilp,
+	loff_t			*ppos,
+	struct pipe_inode_info	*pipe,
+	size_t			len,
+	unsigned int		flags)
+{
+	vnode_t			*vp = vn_from_inode(infilp->f_dentry->d_inode);
+	ssize_t			rval;
+
+	VOP_SPLICE_READ(vp, infilp, ppos, pipe, len, flags, 0, NULL, rval);
+	return rval;
+}
+
+STATIC ssize_t
+xfs_file_splice_read_invis(
+	struct file		*infilp,
+	loff_t			*ppos,
+	struct pipe_inode_info	*pipe,
+	size_t			len,
+	unsigned int		flags)
+{
+	vnode_t			*vp = vn_from_inode(infilp->f_dentry->d_inode);
+	ssize_t			rval;
+
+	VOP_SPLICE_READ(vp, infilp, ppos, pipe, len, flags, IO_INVIS, NULL, rval);
 	return rval;
 }
 
+STATIC ssize_t
+xfs_file_splice_write(
+	struct pipe_inode_info	*pipe,
+	struct file		*outfilp,
+	loff_t			*ppos,
+	size_t			len,
+	unsigned int		flags)
+{
+	vnode_t			*vp = vn_from_inode(outfilp->f_dentry->d_inode);
+	ssize_t			rval;
+
+	VOP_SPLICE_WRITE(vp, pipe, outfilp, ppos, len, flags, 0, NULL, rval);
+	return rval;
+}
+
+STATIC ssize_t
+xfs_file_splice_write_invis(
+	struct pipe_inode_info	*pipe,
+	struct file		*outfilp,
+	loff_t			*ppos,
+	size_t			len,
+	unsigned int		flags)
+{
+	vnode_t			*vp = vn_from_inode(outfilp->f_dentry->d_inode);
+	ssize_t			rval;
+
+	VOP_SPLICE_WRITE(vp, pipe, outfilp, ppos, len, flags, IO_INVIS, NULL, rval);
+	return rval;
+}
 
 STATIC int
 xfs_file_open(
@@ -251,13 +319,10 @@ xfs_file_open(
 
 	if (!(filp->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
 		return -EFBIG;
-
-	ASSERT(vp);
 	VOP_OPEN(vp, NULL, error);
 	return -error;
 }
 
-
 STATIC int
 xfs_file_release(
 	struct inode	*inode,
@@ -271,7 +336,6 @@ xfs_file_release(
 	return -error;
 }
 
-
 STATIC int
 xfs_file_fsync(
 	struct file	*filp,
@@ -285,21 +349,11 @@ xfs_file_fsync(
 
 	if (datasync)
 		flags |= FSYNC_DATA;
-
-	ASSERT(vp);
 	VOP_FSYNC(vp, flags, NULL, (xfs_off_t)0, (xfs_off_t)-1, error);
 	return -error;
 }
 
-/*
- * xfs_file_readdir maps to VOP_READDIR().
- * We need to build a uio, cred, ...
- */
-
-#define nextdp(dp)      ((struct xfs_dirent *)((char *)(dp) + (dp)->d_reclen))
-
 #ifdef CONFIG_XFS_DMAPI
-
 STATIC struct page *
 xfs_vm_nopage(
 	struct vm_area_struct	*area,
@@ -319,10 +373,8 @@ xfs_vm_nopage(
 
 	return filemap_nopage(area, address, type);
 }
-
 #endif /* CONFIG_XFS_DMAPI */
 
-
 STATIC int
 xfs_file_readdir(
 	struct file	*filp,
@@ -330,7 +382,7 @@ xfs_file_readdir(
 	filldir_t	filldir)
 {
 	int		error = 0;
-	vnode_t		*vp;
+	vnode_t		*vp = vn_from_inode(filp->f_dentry->d_inode);
 	uio_t		uio;
 	iovec_t		iov;
 	int		eof = 0;
@@ -340,9 +392,6 @@ xfs_file_readdir(
 	xfs_off_t	start_offset, curr_offset;
 	xfs_dirent_t	*dbp = NULL;
 
-	vp = vn_from_inode(filp->f_dentry->d_inode);
-	ASSERT(vp);
-
 	/* Try fairly hard to get memory */
 	do {
 		if ((read_buf = (caddr_t)kmalloc(rlen, GFP_KERNEL)))
@@ -387,7 +436,7 @@ xfs_file_readdir(
 			}
 			size -= dbp->d_reclen;
 			curr_offset = (loff_t)dbp->d_off /* & 0x7fffffff */;
-			dbp = nextdp(dbp);
+			dbp = (xfs_dirent_t *)((char *)dbp + dbp->d_reclen);
 		}
 	}
 done:
@@ -402,7 +451,6 @@ done:
 	return -error;
 }
 
-
 STATIC int
 xfs_file_mmap(
 	struct file	*filp,
@@ -457,11 +505,10 @@ xfs_file_ioctl_invis(
 	unsigned int	cmd,
 	unsigned long	arg)
 {
-	int		error;
 	struct inode	*inode = filp->f_dentry->d_inode;
 	vnode_t		*vp = vn_from_inode(inode);
+	int		error;
 
-	ASSERT(vp);
 	VOP_IOCTL(vp, inode, filp, IO_INVIS, cmd, (void __user *)arg, error);
 	VMODIFY(vp);
 
@@ -537,6 +584,8 @@ const struct file_operations xfs_file_operations = {
 	.aio_read	= xfs_file_aio_read,
 	.aio_write	= xfs_file_aio_write,
 	.sendfile	= xfs_file_sendfile,
+	.splice_read	= xfs_file_splice_read,
+	.splice_write	= xfs_file_splice_write,
 	.unlocked_ioctl	= xfs_file_ioctl,
 #ifdef CONFIG_COMPAT
 	.compat_ioctl	= xfs_file_compat_ioctl,
@@ -558,7 +607,9 @@ const struct file_operations xfs_invis_file_operations = {
 	.writev		= xfs_file_writev_invis,
 	.aio_read	= xfs_file_aio_read_invis,
 	.aio_write	= xfs_file_aio_write_invis,
-	.sendfile	= xfs_file_sendfile,
+	.sendfile	= xfs_file_sendfile_invis,
+	.splice_read	= xfs_file_splice_read_invis,
+	.splice_write	= xfs_file_splice_write_invis,
 	.unlocked_ioctl	= xfs_file_ioctl_invis,
 #ifdef CONFIG_COMPAT
 	.compat_ioctl	= xfs_file_compat_invis_ioctl,
diff --git a/fs/xfs/linux-2.6/xfs_ioctl32.c b/fs/xfs/linux-2.6/xfs_ioctl32.c
index b6321abd9a81..251bfe451a3f 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl32.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl32.c
@@ -72,7 +72,7 @@ xfs_ioctl32_flock(
 	    copy_in_user(&p->l_pid,	&p32->l_pid,	sizeof(u32)) ||
 	    copy_in_user(&p->l_pad,	&p32->l_pad,	4*sizeof(u32)))
 		return -EFAULT;
-	
+
 	return (unsigned long)p;
 }
 
@@ -107,11 +107,15 @@ xfs_ioctl32_bulkstat(
 #endif
 
 STATIC long
-xfs_compat_ioctl(int mode, struct file *f, unsigned cmd, unsigned long arg)
+xfs_compat_ioctl(
+	int		mode,
+	struct file	*file,
+	unsigned	cmd,
+	unsigned long	arg)
 {
+	struct inode	*inode = file->f_dentry->d_inode;
+	vnode_t		*vp = vn_from_inode(inode);
 	int		error;
-	struct		inode *inode = f->f_dentry->d_inode;
-	vnode_t		*vp = vn_to_inode(inode);
 
 	switch (cmd) {
 	case XFS_IOC_DIOINFO:
@@ -189,7 +193,7 @@ xfs_compat_ioctl(int mode, struct file *f, unsigned cmd, unsigned long arg)
 		return -ENOIOCTLCMD;
 	}
 
-	VOP_IOCTL(vp, inode, f, mode, cmd, (void __user *)arg, error);
+	VOP_IOCTL(vp, inode, file, mode, cmd, (void __user *)arg, error);
 	VMODIFY(vp);
 
 	return error;
@@ -197,18 +201,18 @@ xfs_compat_ioctl(int mode, struct file *f, unsigned cmd, unsigned long arg)
 
 long
 xfs_file_compat_ioctl(
-	struct file		*f,
+	struct file		*file,
 	unsigned		cmd,
 	unsigned long		arg)
 {
-	return xfs_compat_ioctl(0, f, cmd, arg);
+	return xfs_compat_ioctl(0, file, cmd, arg);
 }
 
 long
 xfs_file_compat_invis_ioctl(
-	struct file		*f,
+	struct file		*file,
 	unsigned		cmd,
 	unsigned long		arg)
 {
-	return xfs_compat_ioctl(IO_INVIS, f, cmd, arg);
+	return xfs_compat_ioctl(IO_INVIS, file, cmd, arg);
 }
diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c
index af487437bd7e..2e2e275c786f 100644
--- a/fs/xfs/linux-2.6/xfs_iops.c
+++ b/fs/xfs/linux-2.6/xfs_iops.c
@@ -673,8 +673,7 @@ xfs_vn_setattr(
 	if (ia_valid & ATTR_ATIME) {
 		vattr.va_mask |= XFS_AT_ATIME;
 		vattr.va_atime = attr->ia_atime;
-		if (ia_valid & ATTR_ATIME_SET)
-			inode->i_atime = attr->ia_atime;
+		inode->i_atime = attr->ia_atime;
 	}
 	if (ia_valid & ATTR_MTIME) {
 		vattr.va_mask |= XFS_AT_MTIME;
@@ -708,7 +707,7 @@ STATIC void
 xfs_vn_truncate(
 	struct inode	*inode)
 {
-	block_truncate_page(inode->i_mapping, inode->i_size, xfs_get_block);
+	block_truncate_page(inode->i_mapping, inode->i_size, xfs_get_blocks);
 }
 
 STATIC int
diff --git a/fs/xfs/linux-2.6/xfs_linux.h b/fs/xfs/linux-2.6/xfs_linux.h
index 1fe09f2d6519..e9fe43d74768 100644
--- a/fs/xfs/linux-2.6/xfs_linux.h
+++ b/fs/xfs/linux-2.6/xfs_linux.h
@@ -103,6 +103,7 @@
  */
 #undef  HAVE_REFCACHE	/* reference cache not needed for NFS in 2.6 */
 #define HAVE_SENDFILE	/* sendfile(2) exists in 2.6, but not in 2.4 */
+#define HAVE_SPLICE	/* a splice(2) exists in 2.6, but not in 2.4 */
 #ifdef CONFIG_SMP
 #define HAVE_PERCPU_SB	/* per cpu superblock counters are a 2.6 feature */
 #else
diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index 0169360475c4..67efe3308980 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -301,36 +301,23 @@ xfs_sendfile(
 	void			*target,
 	cred_t			*credp)
 {
+	xfs_inode_t		*ip = XFS_BHVTOI(bdp);
+	xfs_mount_t		*mp = ip->i_mount;
 	ssize_t			ret;
-	xfs_fsize_t		n;
-	xfs_inode_t		*ip;
-	xfs_mount_t		*mp;
-	vnode_t			*vp;
-
-	ip = XFS_BHVTOI(bdp);
-	vp = BHV_TO_VNODE(bdp);
-	mp = ip->i_mount;
 
 	XFS_STATS_INC(xs_read_calls);
-
-	n = XFS_MAXIOFFSET(mp) - *offset;
-	if ((n <= 0) || (count == 0))
-		return 0;
-
-	if (n < count)
-		count = n;
-
-	if (XFS_FORCED_SHUTDOWN(ip->i_mount))
+	if (XFS_FORCED_SHUTDOWN(mp))
 		return -EIO;
 
 	xfs_ilock(ip, XFS_IOLOCK_SHARED);
 
-	if (DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_READ) &&
+	if (DM_EVENT_ENABLED(BHV_TO_VNODE(bdp)->v_vfsp, ip, DM_EVENT_READ) &&
 	    (!(ioflags & IO_INVIS))) {
 		vrwlock_t locktype = VRWLOCK_READ;
 		int error;
 
-		error = XFS_SEND_DATA(mp, DM_EVENT_READ, BHV_TO_VNODE(bdp), *offset, count,
+		error = XFS_SEND_DATA(mp, DM_EVENT_READ, BHV_TO_VNODE(bdp),
+				      *offset, count,
 				      FILP_DELAY_FLAG(filp), &locktype);
 		if (error) {
 			xfs_iunlock(ip, XFS_IOLOCK_SHARED);
@@ -340,12 +327,98 @@ xfs_sendfile(
 	xfs_rw_enter_trace(XFS_SENDFILE_ENTER, &ip->i_iocore,
 		   (void *)(unsigned long)target, count, *offset, ioflags);
 	ret = generic_file_sendfile(filp, offset, count, actor, target);
+	if (ret > 0)
+		XFS_STATS_ADD(xs_read_bytes, ret);
 
 	xfs_iunlock(ip, XFS_IOLOCK_SHARED);
+	return ret;
+}
 
+ssize_t
+xfs_splice_read(
+	bhv_desc_t		*bdp,
+	struct file		*infilp,
+	loff_t			*ppos,
+	struct pipe_inode_info	*pipe,
+	size_t			count,
+	int			flags,
+	int			ioflags,
+	cred_t			*credp)
+{
+	xfs_inode_t		*ip = XFS_BHVTOI(bdp);
+	xfs_mount_t		*mp = ip->i_mount;
+	ssize_t			ret;
+
+	XFS_STATS_INC(xs_read_calls);
+	if (XFS_FORCED_SHUTDOWN(ip->i_mount))
+		return -EIO;
+
+	xfs_ilock(ip, XFS_IOLOCK_SHARED);
+
+	if (DM_EVENT_ENABLED(BHV_TO_VNODE(bdp)->v_vfsp, ip, DM_EVENT_READ) &&
+	    (!(ioflags & IO_INVIS))) {
+		vrwlock_t locktype = VRWLOCK_READ;
+		int error;
+
+		error = XFS_SEND_DATA(mp, DM_EVENT_READ, BHV_TO_VNODE(bdp),
+					*ppos, count,
+					FILP_DELAY_FLAG(infilp), &locktype);
+		if (error) {
+			xfs_iunlock(ip, XFS_IOLOCK_SHARED);
+			return -error;
+		}
+	}
+	xfs_rw_enter_trace(XFS_SPLICE_READ_ENTER, &ip->i_iocore,
+			   pipe, count, *ppos, ioflags);
+	ret = generic_file_splice_read(infilp, ppos, pipe, count, flags);
 	if (ret > 0)
 		XFS_STATS_ADD(xs_read_bytes, ret);
 
+	xfs_iunlock(ip, XFS_IOLOCK_SHARED);
+	return ret;
+}
+
+ssize_t
+xfs_splice_write(
+	bhv_desc_t		*bdp,
+	struct pipe_inode_info	*pipe,
+	struct file		*outfilp,
+	loff_t			*ppos,
+	size_t			count,
+	int			flags,
+	int			ioflags,
+	cred_t			*credp)
+{
+	xfs_inode_t		*ip = XFS_BHVTOI(bdp);
+	xfs_mount_t		*mp = ip->i_mount;
+	ssize_t			ret;
+
+	XFS_STATS_INC(xs_write_calls);
+	if (XFS_FORCED_SHUTDOWN(ip->i_mount))
+		return -EIO;
+
+	xfs_ilock(ip, XFS_IOLOCK_EXCL);
+
+	if (DM_EVENT_ENABLED(BHV_TO_VNODE(bdp)->v_vfsp, ip, DM_EVENT_WRITE) &&
+	    (!(ioflags & IO_INVIS))) {
+		vrwlock_t locktype = VRWLOCK_WRITE;
+		int error;
+
+		error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, BHV_TO_VNODE(bdp),
+					*ppos, count,
+					FILP_DELAY_FLAG(outfilp), &locktype);
+		if (error) {
+			xfs_iunlock(ip, XFS_IOLOCK_EXCL);
+			return -error;
+		}
+	}
+	xfs_rw_enter_trace(XFS_SPLICE_WRITE_ENTER, &ip->i_iocore,
+			   pipe, count, *ppos, ioflags);
+	ret = generic_file_splice_write(pipe, outfilp, ppos, count, flags);
+	if (ret > 0)
+		XFS_STATS_ADD(xs_write_bytes, ret);
+
+	xfs_iunlock(ip, XFS_IOLOCK_EXCL);
 	return ret;
 }
 
@@ -363,7 +436,7 @@ xfs_zero_last_block(
 	xfs_fsize_t	end_size)
 {
 	xfs_fileoff_t	last_fsb;
-	xfs_mount_t	*mp;
+	xfs_mount_t	*mp = io->io_mount;
 	int		nimaps;
 	int		zero_offset;
 	int		zero_len;
@@ -373,8 +446,6 @@ xfs_zero_last_block(
 
 	ASSERT(ismrlocked(io->io_lock, MR_UPDATE) != 0);
 
-	mp = io->io_mount;
-
 	zero_offset = XFS_B_FSB_OFFSET(mp, isize);
 	if (zero_offset == 0) {
 		/*
@@ -405,10 +476,9 @@ xfs_zero_last_block(
 	 * don't deadlock when the buffer cache calls back to us.
 	 */
 	XFS_IUNLOCK(mp, io, XFS_ILOCK_EXCL| XFS_EXTSIZE_RD);
-	loff = XFS_FSB_TO_B(mp, last_fsb);
 
+	loff = XFS_FSB_TO_B(mp, last_fsb);
 	zero_len = mp->m_sb.sb_blocksize - zero_offset;
-
 	error = xfs_iozero(ip, loff + zero_offset, zero_len, end_size);
 
 	XFS_ILOCK(mp, io, XFS_ILOCK_EXCL|XFS_EXTSIZE_RD);
@@ -441,7 +511,7 @@ xfs_zero_eof(
 	xfs_fileoff_t	zero_count_fsb;
 	xfs_fileoff_t	last_fsb;
 	xfs_extlen_t	buf_len_fsb;
-	xfs_mount_t	*mp;
+	xfs_mount_t	*mp = io->io_mount;
 	int		nimaps;
 	int		error = 0;
 	xfs_bmbt_irec_t	imap;
@@ -450,8 +520,6 @@ xfs_zero_eof(
 	ASSERT(ismrlocked(io->io_iolock, MR_UPDATE));
 	ASSERT(offset > isize);
 
-	mp = io->io_mount;
-
 	/*
 	 * First handle zeroing the block on which isize resides.
 	 * We only zero a part of that block so it is handled specially.
@@ -681,7 +749,7 @@ start:
 		eventsent = 1;
 
 		/*
-		 * The iolock was dropped and reaquired in XFS_SEND_DATA
+		 * The iolock was dropped and reacquired in XFS_SEND_DATA
 		 * so we have to recheck the size when appending.
 		 * We will only "goto start;" once, since having sent the
 		 * event prevents another call to XFS_SEND_DATA, which is
diff --git a/fs/xfs/linux-2.6/xfs_lrw.h b/fs/xfs/linux-2.6/xfs_lrw.h
index 38864a88d42d..8f4539952350 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.h
+++ b/fs/xfs/linux-2.6/xfs_lrw.h
@@ -60,6 +60,8 @@ struct xfs_iomap;
 #define	XFS_IOMAP_ALLOC_ENTER	25
 #define	XFS_IOMAP_ALLOC_MAP	26
 #define	XFS_IOMAP_UNWRITTEN	27
+#define XFS_SPLICE_READ_ENTER	28
+#define XFS_SPLICE_WRITE_ENTER	29
 extern void xfs_rw_enter_trace(int, struct xfs_iocore *,
 				void *, size_t, loff_t, int);
 extern void xfs_inval_cached_trace(struct xfs_iocore *,
@@ -78,6 +80,7 @@ extern int xfs_bmap(struct bhv_desc *, xfs_off_t, ssize_t, int,
 			struct xfs_iomap *, int *);
 extern int xfsbdstrat(struct xfs_mount *, struct xfs_buf *);
 extern int xfs_bdstrat_cb(struct xfs_buf *);
+extern int xfs_dev_is_read_only(struct xfs_mount *, char *);
 
 extern int xfs_zero_eof(struct vnode *, struct xfs_iocore *, xfs_off_t,
 				xfs_fsize_t, xfs_fsize_t);
@@ -90,7 +93,11 @@ extern ssize_t xfs_write(struct bhv_desc *, struct kiocb *,
 extern ssize_t xfs_sendfile(struct bhv_desc *, struct file *,
 				loff_t *, int, size_t, read_actor_t,
 				void *, struct cred *);
-
-extern int xfs_dev_is_read_only(struct xfs_mount *, char *);
+extern ssize_t xfs_splice_read(struct bhv_desc *, struct file *, loff_t *,
+				struct pipe_inode_info *, size_t, int, int,
+				struct cred *);
+extern ssize_t xfs_splice_write(struct bhv_desc *, struct pipe_inode_info *,
+				struct file *, loff_t *, size_t, int, int,
+				struct cred *);
 
 #endif	/* __XFS_LRW_H__ */
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 1884300417e3..68f4793e8a11 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -67,7 +67,8 @@ mempool_t *xfs_ioend_pool;
 
 STATIC struct xfs_mount_args *
 xfs_args_allocate(
-	struct super_block	*sb)
+	struct super_block	*sb,
+	int			silent)
 {
 	struct xfs_mount_args	*args;
 
@@ -80,8 +81,8 @@ xfs_args_allocate(
 		args->flags |= XFSMNT_DIRSYNC;
 	if (sb->s_flags & MS_SYNCHRONOUS)
 		args->flags |= XFSMNT_WSYNC;
-
-	/* Default to 32 bit inodes on Linux all the time */
+	if (silent)
+		args->flags |= XFSMNT_QUIET;
 	args->flags |= XFSMNT_32BITINODES;
 
 	return args;
@@ -719,7 +720,7 @@ xfs_fs_remount(
 	char			*options)
 {
 	vfs_t			*vfsp = vfs_from_sb(sb);
-	struct xfs_mount_args	*args = xfs_args_allocate(sb);
+	struct xfs_mount_args	*args = xfs_args_allocate(sb, 0);
 	int			error;
 
 	VFS_PARSEARGS(vfsp, options, args, 1, error);
@@ -825,7 +826,7 @@ xfs_fs_fill_super(
 {
 	vnode_t			*rootvp;
 	struct vfs		*vfsp = vfs_allocate(sb);
-	struct xfs_mount_args	*args = xfs_args_allocate(sb);
+	struct xfs_mount_args	*args = xfs_args_allocate(sb, silent);
 	struct kstatfs		statvfs;
 	int			error, error2;
 
diff --git a/fs/xfs/linux-2.6/xfs_vfs.h b/fs/xfs/linux-2.6/xfs_vfs.h
index 8fed356db055..841200c03092 100644
--- a/fs/xfs/linux-2.6/xfs_vfs.h
+++ b/fs/xfs/linux-2.6/xfs_vfs.h
@@ -92,7 +92,7 @@ typedef enum {
 #define SYNC_FSDATA		0x0020	/* flush fs data (e.g. superblocks) */
 #define SYNC_REFCACHE		0x0040  /* prune some of the nfs ref cache */
 #define SYNC_REMOUNT		0x0080  /* remount readonly, no dummy LRs */
-#define SYNC_QUIESCE		0x0100  /* quiesce fileystem for a snapshot */
+#define SYNC_QUIESCE		0x0100  /* quiesce filesystem for a snapshot */
 
 typedef int	(*vfs_mount_t)(bhv_desc_t *,
 				struct xfs_mount_args *, struct cred *);
diff --git a/fs/xfs/linux-2.6/xfs_vnode.h b/fs/xfs/linux-2.6/xfs_vnode.h
index 06f5845e9568..2a8e16c22353 100644
--- a/fs/xfs/linux-2.6/xfs_vnode.h
+++ b/fs/xfs/linux-2.6/xfs_vnode.h
@@ -173,6 +173,12 @@ typedef ssize_t (*vop_write_t)(bhv_desc_t *, struct kiocb *,
 typedef ssize_t (*vop_sendfile_t)(bhv_desc_t *, struct file *,
 				loff_t *, int, size_t, read_actor_t,
 				void *, struct cred *);
+typedef ssize_t (*vop_splice_read_t)(bhv_desc_t *, struct file *, loff_t *,
+				struct pipe_inode_info *, size_t, int, int,
+				struct cred *);
+typedef ssize_t (*vop_splice_write_t)(bhv_desc_t *, struct pipe_inode_info *,
+				struct file *, loff_t *, size_t, int, int,
+				struct cred *);
 typedef int	(*vop_ioctl_t)(bhv_desc_t *, struct inode *, struct file *,
 				int, unsigned int, void __user *);
 typedef int	(*vop_getattr_t)(bhv_desc_t *, struct vattr *, int,
@@ -231,6 +237,8 @@ typedef struct vnodeops {
 	vop_read_t		vop_read;
 	vop_write_t		vop_write;
 	vop_sendfile_t		vop_sendfile;
+	vop_splice_read_t	vop_splice_read;
+	vop_splice_write_t	vop_splice_write;
 	vop_ioctl_t		vop_ioctl;
 	vop_getattr_t		vop_getattr;
 	vop_setattr_t		vop_setattr;
@@ -276,6 +284,10 @@ typedef struct vnodeops {
 	rv = _VOP_(vop_write, vp)((vp)->v_fbhv,file,iov,segs,offset,ioflags,cr)
 #define VOP_SENDFILE(vp,f,off,ioflags,cnt,act,targ,cr,rv)		\
 	rv = _VOP_(vop_sendfile, vp)((vp)->v_fbhv,f,off,ioflags,cnt,act,targ,cr)
+#define VOP_SPLICE_READ(vp,f,o,pipe,cnt,fl,iofl,cr,rv)			\
+	rv = _VOP_(vop_splice_read, vp)((vp)->v_fbhv,f,o,pipe,cnt,fl,iofl,cr)
+#define VOP_SPLICE_WRITE(vp,f,o,pipe,cnt,fl,iofl,cr,rv)			\
+	rv = _VOP_(vop_splice_write, vp)((vp)->v_fbhv,f,o,pipe,cnt,fl,iofl,cr)
 #define VOP_BMAP(vp,of,sz,rw,b,n,rv)					\
 	rv = _VOP_(vop_bmap, vp)((vp)->v_fbhv,of,sz,rw,b,n)
 #define VOP_OPEN(vp, cr, rv)						\