commit 3dc68d6ba74a315c7e8ff707bd1568c7a22d95b9
Author: Erez Zadok <[EMAIL PROTECTED]>
Date: Tue Apr 15 14:30:10 2008 -0400
VFS: rename do_splice_to/from to vfs_splice_* and export symbols
A stackable file system which uses vm_ops->fault, and does not implement
address_space_operations, cannot use generic_file_splice_read/write, but has
to implement ->splice_read/write itself. These two helper functions are
very useful to such a module.
Signed-off-by: Erez Zadok <[EMAIL PROTECTED]>
diff --git a/fs/splice.c b/fs/splice.c
index dbbe267..1119963 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -917,8 +917,8 @@ EXPORT_SYMBOL(generic_splice_sendpage);
/*
* Attempt to initiate a splice from pipe to file.
*/
-static long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
- loff_t *ppos, size_t len, unsigned int flags)
+long vfs_splice_from(struct pipe_inode_info *pipe, struct file *out,
+ loff_t *ppos, size_t len, unsigned int flags)
{
int ret;
@@ -934,13 +934,14 @@ static long do_splice_from(struct pipe_inode_info *pipe,
struct file *out,
return out->f_op->splice_write(pipe, out, ppos, len, flags);
}
+EXPORT_SYMBOL_GPL(vfs_splice_from);
/*
* Attempt to initiate a splice from a file to a pipe.
*/
-static long do_splice_to(struct file *in, loff_t *ppos,
- struct pipe_inode_info *pipe, size_t len,
- unsigned int flags)
+long vfs_splice_to(struct file *in, loff_t *ppos,
+ struct pipe_inode_info *pipe, size_t len,
+ unsigned int flags)
{
int ret;
@@ -956,6 +957,7 @@ static long do_splice_to(struct file *in, loff_t *ppos,
return in->f_op->splice_read(in, ppos, pipe, len, flags);
}
+EXPORT_SYMBOL_GPL(vfs_splice_to);
long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,
size_t len, unsigned int flags)
@@ -1010,7 +1012,7 @@ long do_splice_direct(struct file *in, loff_t *ppos,
struct file *out,
*/
max_read_len = min(len, (size_t)(PIPE_BUFFERS*PAGE_SIZE));
- ret = do_splice_to(in, ppos, pipe, max_read_len, flags);
+ ret = vfs_splice_to(in, ppos, pipe, max_read_len, flags);
if (unlikely(ret <= 0))
goto out_release;
@@ -1021,8 +1023,8 @@ long do_splice_direct(struct file *in, loff_t *ppos,
struct file *out,
* must not do the output in nonblocking mode as then we
* could get stuck data in the internal pipe:
*/
- ret = do_splice_from(pipe, out, &out_off, read_len,
- flags & ~SPLICE_F_NONBLOCK);
+ ret = vfs_splice_from(pipe, out, &out_off, read_len,
+ flags & ~SPLICE_F_NONBLOCK);
if (unlikely(ret <= 0))
goto out_release;
@@ -1106,7 +1108,7 @@ static long do_splice(struct file *in, loff_t __user
*off_in,
} else
off = &out->f_pos;
- ret = do_splice_from(pipe, out, off, len, flags);
+ ret = vfs_splice_from(pipe, out, off, len, flags);
if (off_out && copy_to_user(off_out, off, sizeof(loff_t)))
ret = -EFAULT;
@@ -1127,7 +1129,7 @@ static long do_splice(struct file *in, loff_t __user
*off_in,
} else
off = &in->f_pos;
- ret = do_splice_to(in, off, pipe, len, flags);
+ ret = vfs_splice_to(in, off, pipe, len, flags);
if (off_in && copy_to_user(off_in, off, sizeof(loff_t)))
ret = -EFAULT;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 6a41f4c..8f59a46 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1780,6 +1780,11 @@ extern ssize_t generic_splice_sendpage(struct
pipe_inode_info *pipe,
struct file *out, loff_t *, size_t len, unsigned int flags);
extern long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,
size_t len, unsigned int flags);
+extern long vfs_splice_from(struct pipe_inode_info *pipe, struct file *out,
+ loff_t *ppos, size_t len, unsigned int flags);
+extern long vfs_splice_to(struct file *in, loff_t *ppos,
+ struct pipe_inode_info *pipe, size_t len,
+ unsigned int flags);
extern void
file_ra_state_init(struct file_ra_state *ra, struct address_space *mapping);
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