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[PATCH] introduce a "kernel-internal pipe object" abstraction

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separate out the 'internal pipe object' abstraction, and make it
usable to splice. This cleans up and fixes several aspects of the
internal splice APIs and the pipe code:

 - pipes: the allocation and freeing of pipe_inode_info is now more symmetric
   and more streamlined with existing kernel practices.

 - splice: small micro-optimization: less pointer dereferencing in splice
   methods

Signed-off-by: Ingo Molnar <mingo@elte.hu>

Update XFS for the ->splice_read/->splice_write changes.

Signed-off-by: Jens Axboe <axboe@suse.de>
This commit is contained in:
Ingo Molnar
2006-04-10 15:18:35 +02:00
committed by Jens Axboe
parent 0b749ce380
commit 3a326a2ce8
9 changed files with 114 additions and 106 deletions
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8
fs/xfs/linux-2.6/xfs_file.c
View File

@@ -252,7 +252,7 @@ xfs_file_sendfile_invis(
STATIC ssize_t
xfs_file_splice_read(
struct file *infilp,
struct inode *pipe,
struct pipe_inode_info *pipe,
size_t len,
unsigned int flags)
{
@@ -266,7 +266,7 @@ xfs_file_splice_read(
STATIC ssize_t
xfs_file_splice_read_invis(
struct file *infilp,
struct inode *pipe,
struct pipe_inode_info *pipe,
size_t len,
unsigned int flags)
{
@@ -279,7 +279,7 @@ xfs_file_splice_read_invis(
STATIC ssize_t
xfs_file_splice_write(
struct inode *pipe,
struct pipe_inode_info *pipe,
struct file *outfilp,
size_t len,
unsigned int flags)
@@ -293,7 +293,7 @@ xfs_file_splice_write(
STATIC ssize_t
xfs_file_splice_write_invis(
struct inode *pipe,
struct pipe_inode_info *pipe,
struct file *outfilp,
size_t len,
unsigned int flags)

4
fs/xfs/linux-2.6/xfs_lrw.c
View File

@@ -338,7 +338,7 @@ ssize_t
xfs_splice_read(
bhv_desc_t *bdp,
struct file *infilp,
struct inode *pipe,
struct pipe_inode_info *pipe,
size_t count,
int flags,
int ioflags,
@@ -380,7 +380,7 @@ xfs_splice_read(
ssize_t
xfs_splice_write(
bhv_desc_t *bdp,
struct inode *pipe,
struct pipe_inode_info *pipe,
struct file *outfilp,
size_t count,
int flags,

4
fs/xfs/linux-2.6/xfs_lrw.h
View File

@@ -94,9 +94,9 @@ 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 *,
struct inode *, size_t, int, int,
struct pipe_inode_info *, size_t, int, int,
struct cred *);
extern ssize_t xfs_splice_write(struct bhv_desc *, struct inode *,
extern ssize_t xfs_splice_write(struct bhv_desc *, struct pipe_inode_info *,
struct file *, size_t, int, int,
struct cred *);

4
fs/xfs/linux-2.6/xfs_vnode.h
View File

@@ -174,9 +174,9 @@ 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 *,
struct inode *, size_t, int, int,
struct pipe_inode_info *, size_t, int, int,
struct cred *);
typedef ssize_t (*vop_splice_write_t)(bhv_desc_t *, struct inode *,
typedef ssize_t (*vop_splice_write_t)(bhv_desc_t *, struct pipe_inode_info *,
struct file *, size_t, int, int,
struct cred *);
typedef int (*vop_ioctl_t)(bhv_desc_t *, struct inode *, struct file *,