[PATCH] splice: pass offset around for ->splice_read() and ->splice_write()
We need not use ->f_pos as the offset for the file input/output. If the
user passed an offset pointer in through sys_splice(), just use that and
leave ->f_pos alone.
Signed-off-by: Jens Axboe <axboe@suse.de>
diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c
index 269721a..c847416 100644
--- a/fs/xfs/linux-2.6/xfs_file.c
+++ b/fs/xfs/linux-2.6/xfs_file.c
@@ -252,6 +252,7 @@
STATIC ssize_t
xfs_file_splice_read(
struct file *infilp,
+ loff_t *ppos,
struct pipe_inode_info *pipe,
size_t len,
unsigned int flags)
@@ -259,13 +260,14 @@
vnode_t *vp = vn_from_inode(infilp->f_dentry->d_inode);
ssize_t rval;
- VOP_SPLICE_READ(vp, infilp, pipe, len, flags, 0, NULL, 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)
@@ -273,7 +275,7 @@
vnode_t *vp = vn_from_inode(infilp->f_dentry->d_inode);
ssize_t rval;
- VOP_SPLICE_READ(vp, infilp, pipe, len, flags, IO_INVIS, NULL, rval);
+ VOP_SPLICE_READ(vp, infilp, ppos, pipe, len, flags, IO_INVIS, NULL, rval);
return rval;
}
@@ -281,13 +283,14 @@
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, len, flags, 0, NULL, rval);
+ VOP_SPLICE_WRITE(vp, pipe, outfilp, ppos, len, flags, 0, NULL, rval);
return rval;
}
@@ -295,13 +298,14 @@
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, len, flags, IO_INVIS, NULL, rval);
+ VOP_SPLICE_WRITE(vp, pipe, outfilp, ppos, len, flags, IO_INVIS, NULL, rval);
return rval;
}
diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index 74a52937..67efe33 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -338,6 +338,7 @@
xfs_splice_read(
bhv_desc_t *bdp,
struct file *infilp,
+ loff_t *ppos,
struct pipe_inode_info *pipe,
size_t count,
int flags,
@@ -360,7 +361,7 @@
int error;
error = XFS_SEND_DATA(mp, DM_EVENT_READ, BHV_TO_VNODE(bdp),
- infilp->f_pos, count,
+ *ppos, count,
FILP_DELAY_FLAG(infilp), &locktype);
if (error) {
xfs_iunlock(ip, XFS_IOLOCK_SHARED);
@@ -368,8 +369,8 @@
}
}
xfs_rw_enter_trace(XFS_SPLICE_READ_ENTER, &ip->i_iocore,
- pipe, count, infilp->f_pos, ioflags);
- ret = generic_file_splice_read(infilp, pipe, count, flags);
+ pipe, count, *ppos, ioflags);
+ ret = generic_file_splice_read(infilp, ppos, pipe, count, flags);
if (ret > 0)
XFS_STATS_ADD(xs_read_bytes, ret);
@@ -382,6 +383,7 @@
bhv_desc_t *bdp,
struct pipe_inode_info *pipe,
struct file *outfilp,
+ loff_t *ppos,
size_t count,
int flags,
int ioflags,
@@ -403,7 +405,7 @@
int error;
error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, BHV_TO_VNODE(bdp),
- outfilp->f_pos, count,
+ *ppos, count,
FILP_DELAY_FLAG(outfilp), &locktype);
if (error) {
xfs_iunlock(ip, XFS_IOLOCK_EXCL);
@@ -411,8 +413,8 @@
}
}
xfs_rw_enter_trace(XFS_SPLICE_WRITE_ENTER, &ip->i_iocore,
- pipe, count, outfilp->f_pos, ioflags);
- ret = generic_file_splice_write(pipe, outfilp, count, flags);
+ pipe, count, *ppos, ioflags);
+ ret = generic_file_splice_write(pipe, outfilp, ppos, count, flags);
if (ret > 0)
XFS_STATS_ADD(xs_write_bytes, ret);
diff --git a/fs/xfs/linux-2.6/xfs_lrw.h b/fs/xfs/linux-2.6/xfs_lrw.h
index 55c689a..8f45399 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.h
+++ b/fs/xfs/linux-2.6/xfs_lrw.h
@@ -93,11 +93,11 @@
extern ssize_t xfs_sendfile(struct bhv_desc *, struct file *,
loff_t *, int, size_t, read_actor_t,
void *, struct cred *);
-extern ssize_t xfs_splice_read(struct bhv_desc *, struct file *,
+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 *, size_t, int, int,
+ struct file *, loff_t *, size_t, int, int,
struct cred *);
#endif /* __XFS_LRW_H__ */
diff --git a/fs/xfs/linux-2.6/xfs_vnode.h b/fs/xfs/linux-2.6/xfs_vnode.h
index 88b09f1..2a8e16c 100644
--- a/fs/xfs/linux-2.6/xfs_vnode.h
+++ b/fs/xfs/linux-2.6/xfs_vnode.h
@@ -173,11 +173,11 @@
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 *,
+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 *, size_t, int, int,
+ 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 *);
@@ -284,10 +284,10 @@
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,pipe,cnt,fl,iofl,cr,rv) \
- rv = _VOP_(vop_splice_read, vp)((vp)->v_fbhv,f,pipe,cnt,fl,iofl,cr)
-#define VOP_SPLICE_WRITE(vp,f,pipe,cnt,fl,iofl,cr,rv) \
- rv = _VOP_(vop_splice_write, vp)((vp)->v_fbhv,f,pipe,cnt,fl,iofl,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) \