commit e39d2aae4ace768320d64a8ecb6f706458f3bb72
Author: Erez Zadok <[EMAIL PROTECTED]>
Date: Tue Apr 15 19:35:30 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 5428b0f..eb81e7f 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -898,8 +898,8 @@ 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;
@@ -915,13 +915,14 @@ 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)
{
loff_t isize, left;
int ret;
@@ -946,6 +947,7 @@ 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)
@@ -1000,7 +1002,7 @@ 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;
@@ -1011,8 +1013,8 @@ 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;
@@ -1098,7 +1100,7 @@ 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;
@@ -1119,7 +1121,7 @@ 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 86ec3f4..ed2714c 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1738,6 +1738,11 @@ 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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