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Merge branch 'tee' of git://brick.kernel.dk/data/git/linux-2.6-block

Browse Source 
* 'tee' of git://brick.kernel.dk/data/git/linux-2.6-block:
  [PATCH] splice: add support for sys_tee()
  [PATCH] splice: pass offset around for ->splice_read() and ->splice_write()
This commit is contained in:
Linus Torvalds 2006-04-14 09:02:07 -07:00
commit 9ca686626c
16 changed files with 282 additions and 70 deletions
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1
arch/i386/kernel/syscall_table.S
View File

@ -314,3 +314,4 @@ ENTRY(sys_call_table)
.long sys_get_robust_list
.long sys_splice
.long sys_sync_file_range
.long sys_tee /* 315 */

1
arch/ia64/kernel/entry.S
View File

@ -1609,5 +1609,6 @@ sys_call_table:
data8 sys_set_robust_list
data8 sys_get_robust_list
data8 sys_sync_file_range // 1300
data8 sys_tee
.org sys_call_table + 8*NR_syscalls // guard against failures to increase NR_syscalls

1
arch/powerpc/kernel/systbl.S
View File

@ -323,3 +323,4 @@ COMPAT_SYS(pselect6)
COMPAT_SYS(ppoll)
SYSCALL(unshare)
SYSCALL(splice)
SYSCALL(tee)

7
fs/pipe.c
View File

@ -131,12 +131,19 @@ static int anon_pipe_buf_steal(struct pipe_inode_info *pipe,
return 0;
}
static void anon_pipe_buf_get(struct pipe_inode_info *info,
struct pipe_buffer *buf)
{
page_cache_get(buf->page);
}
static struct pipe_buf_operations anon_pipe_buf_ops = {
.can_merge = 1,
.map = anon_pipe_buf_map,
.unmap = anon_pipe_buf_unmap,
.release = anon_pipe_buf_release,
.steal = anon_pipe_buf_steal,
.get = anon_pipe_buf_get,
};
static ssize_t

272
fs/splice.c
View File

@ -125,12 +125,19 @@ static void page_cache_pipe_buf_unmap(struct pipe_inode_info *info,
kunmap(buf->page);
}
static void page_cache_pipe_buf_get(struct pipe_inode_info *info,
struct pipe_buffer *buf)
{
page_cache_get(buf->page);
}
static struct pipe_buf_operations page_cache_pipe_buf_ops = {
.can_merge = 0,
.map = page_cache_pipe_buf_map,
.unmap = page_cache_pipe_buf_unmap,
.release = page_cache_pipe_buf_release,
.steal = page_cache_pipe_buf_steal,
.get = page_cache_pipe_buf_get,
};
/*
@ -231,8 +238,9 @@ static ssize_t move_to_pipe(struct pipe_inode_info *pipe, struct page **pages,
}
static int
__generic_file_splice_read(struct file *in, struct pipe_inode_info *pipe,
size_t len, unsigned int flags)
__generic_file_splice_read(struct file *in, loff_t *ppos,
struct pipe_inode_info *pipe, size_t len,
unsigned int flags)
{
struct address_space *mapping = in->f_mapping;
unsigned int offset, nr_pages;
@ -241,8 +249,8 @@ __generic_file_splice_read(struct file *in, struct pipe_inode_info *pipe,
pgoff_t index;
int i, error;
index = in->f_pos >> PAGE_CACHE_SHIFT;
offset = in->f_pos & ~PAGE_CACHE_MASK;
index = *ppos >> PAGE_CACHE_SHIFT;
offset = *ppos & ~PAGE_CACHE_MASK;
nr_pages = (len + offset + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
if (nr_pages > PIPE_BUFFERS)
@ -348,8 +356,9 @@ fill_it:
*
* Will read pages from given file and fill them into a pipe.
*/
ssize_t generic_file_splice_read(struct file *in, struct pipe_inode_info *pipe,
size_t len, unsigned int flags)
ssize_t generic_file_splice_read(struct file *in, loff_t *ppos,
struct pipe_inode_info *pipe, size_t len,
unsigned int flags)
{
ssize_t spliced;
int ret;
@ -358,12 +367,12 @@ ssize_t generic_file_splice_read(struct file *in, struct pipe_inode_info *pipe,
spliced = 0;
while (len) {
ret = __generic_file_splice_read(in, pipe, len, flags);
ret = __generic_file_splice_read(in, ppos, pipe, len, flags);
if (ret <= 0)
break;
in->f_pos += ret;
*ppos += ret;
len -= ret;
spliced += ret;
@ -561,7 +570,7 @@ typedef int (splice_actor)(struct pipe_inode_info *, struct pipe_buffer *,
* to the wanted destination. See pipe_to_file/pipe_to_sendpage above.
*/
static ssize_t move_from_pipe(struct pipe_inode_info *pipe, struct file *out,
size_t len, unsigned int flags,
loff_t *ppos, size_t len, unsigned int flags,
splice_actor *actor)
{
int ret, do_wakeup, err;
@ -573,7 +582,7 @@ static ssize_t move_from_pipe(struct pipe_inode_info *pipe, struct file *out,
sd.total_len = len;
sd.flags = flags;
sd.file = out;
sd.pos = out->f_pos;
sd.pos = *ppos;
if (pipe->inode)
mutex_lock(&pipe->inode->i_mutex);
@ -656,9 +665,7 @@ static ssize_t move_from_pipe(struct pipe_inode_info *pipe, struct file *out,
kill_fasync(&pipe->fasync_writers, SIGIO, POLL_OUT);
}
out->f_pos = sd.pos;
return ret;
}
/**
@ -674,12 +681,12 @@ static ssize_t move_from_pipe(struct pipe_inode_info *pipe, struct file *out,
*/
ssize_t
generic_file_splice_write(struct pipe_inode_info *pipe, struct file *out,
size_t len, unsigned int flags)
loff_t *ppos, size_t len, unsigned int flags)
{
struct address_space *mapping = out->f_mapping;
ssize_t ret;
ret = move_from_pipe(pipe, out, len, flags, pipe_to_file);
ret = move_from_pipe(pipe, out, ppos, len, flags, pipe_to_file);
/*
* If file or inode is SYNC and we actually wrote some data, sync it.
@ -715,9 +722,9 @@ EXPORT_SYMBOL(generic_file_splice_write);
*
*/
ssize_t generic_splice_sendpage(struct pipe_inode_info *pipe, struct file *out,
size_t len, unsigned int flags)
loff_t *ppos, size_t len, unsigned int flags)
{
return move_from_pipe(pipe, out, len, flags, pipe_to_sendpage);
return move_from_pipe(pipe, out, ppos, len, flags, pipe_to_sendpage);
}
EXPORT_SYMBOL(generic_splice_sendpage);
@ -726,9 +733,8 @@ 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,
size_t len, unsigned int flags)
loff_t *ppos, size_t len, unsigned int flags)
{
loff_t pos;
int ret;
if (unlikely(!out->f_op || !out->f_op->splice_write))
@ -737,22 +743,21 @@ static long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
if (unlikely(!(out->f_mode & FMODE_WRITE)))
return -EBADF;
pos = out->f_pos;
ret = rw_verify_area(WRITE, out, &pos, len);
ret = rw_verify_area(WRITE, out, ppos, len);
if (unlikely(ret < 0))
return ret;
return out->f_op->splice_write(pipe, out, len, flags);
return out->f_op->splice_write(pipe, out, ppos, len, flags);
}
/*
* Attempt to initiate a splice from a file to a pipe.
*/
static long do_splice_to(struct file *in, struct pipe_inode_info *pipe,
size_t len, unsigned int flags)
static long do_splice_to(struct file *in, loff_t *ppos,
struct pipe_inode_info *pipe, size_t len,
unsigned int flags)
{
loff_t pos, isize, left;
loff_t isize, left;
int ret;
if (unlikely(!in->f_op || !in->f_op->splice_read))
@ -761,28 +766,27 @@ static long do_splice_to(struct file *in, struct pipe_inode_info *pipe,
if (unlikely(!(in->f_mode & FMODE_READ)))
return -EBADF;
pos = in->f_pos;
ret = rw_verify_area(READ, in, &pos, len);
ret = rw_verify_area(READ, in, ppos, len);
if (unlikely(ret < 0))
return ret;
isize = i_size_read(in->f_mapping->host);
if (unlikely(in->f_pos >= isize))
if (unlikely(*ppos >= isize))
return 0;
left = isize - in->f_pos;
left = isize - *ppos;
if (unlikely(left < len))
len = left;
return in->f_op->splice_read(in, pipe, len, flags);
return in->f_op->splice_read(in, ppos, pipe, len, flags);
}
long do_splice_direct(struct file *in, struct file *out, size_t len,
unsigned int flags)
long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,
size_t len, unsigned int flags)
{
struct pipe_inode_info *pipe;
long ret, bytes;
loff_t out_off;
umode_t i_mode;
int i;
@ -820,6 +824,7 @@ long do_splice_direct(struct file *in, struct file *out, size_t len,
*/
ret = 0;
bytes = 0;
out_off = 0;
while (len) {
size_t read_len, max_read_len;
@ -829,7 +834,7 @@ long do_splice_direct(struct file *in, struct file *out, size_t len,
*/
max_read_len = min(len, (size_t)(PIPE_BUFFERS*PAGE_SIZE));
ret = do_splice_to(in, pipe, max_read_len, flags);
ret = do_splice_to(in, ppos, pipe, max_read_len, flags);
if (unlikely(ret < 0))
goto out_release;
@ -840,7 +845,7 @@ long do_splice_direct(struct file *in, struct file *out, size_t len,
* 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, read_len,
ret = do_splice_from(pipe, out, &out_off, read_len,
flags & ~SPLICE_F_NONBLOCK);
if (unlikely(ret < 0))
goto out_release;
@ -898,6 +903,7 @@ static long do_splice(struct file *in, loff_t __user *off_in,
size_t len, unsigned int flags)
{
struct pipe_inode_info *pipe;
loff_t offset, *off;
pipe = in->f_dentry->d_inode->i_pipe;
if (pipe) {
@ -906,12 +912,13 @@ static long do_splice(struct file *in, loff_t __user *off_in,
if (off_out) {
if (out->f_op->llseek == no_llseek)
return -EINVAL;
if (copy_from_user(&out->f_pos, off_out,
sizeof(loff_t)))
if (copy_from_user(&offset, off_out, sizeof(loff_t)))
return -EFAULT;
}
off = &offset;
} else
off = &out->f_pos;
return do_splice_from(pipe, out, len, flags);
return do_splice_from(pipe, out, off, len, flags);
}
pipe = out->f_dentry->d_inode->i_pipe;
@ -921,11 +928,13 @@ static long do_splice(struct file *in, loff_t __user *off_in,
if (off_in) {
if (in->f_op->llseek == no_llseek)
return -EINVAL;
if (copy_from_user(&in->f_pos, off_in, sizeof(loff_t)))
if (copy_from_user(&offset, off_in, sizeof(loff_t)))
return -EFAULT;
}
off = &offset;
} else
off = &in->f_pos;
return do_splice_to(in, pipe, len, flags);
return do_splice_to(in, off, pipe, len, flags);
}
return -EINVAL;
@ -961,3 +970,182 @@ asmlinkage long sys_splice(int fd_in, loff_t __user *off_in,
return error;
}
/*
* Link contents of ipipe to opipe.
*/
static int link_pipe(struct pipe_inode_info *ipipe,
struct pipe_inode_info *opipe,
size_t len, unsigned int flags)
{
struct pipe_buffer *ibuf, *obuf;
int ret = 0, do_wakeup = 0, i;
/*
* Potential ABBA deadlock, work around it by ordering lock
* grabbing by inode address. Otherwise two different processes
* could deadlock (one doing tee from A -> B, the other from B -> A).
*/
if (ipipe->inode < opipe->inode) {
mutex_lock(&ipipe->inode->i_mutex);
mutex_lock(&opipe->inode->i_mutex);
} else {
mutex_lock(&opipe->inode->i_mutex);
mutex_lock(&ipipe->inode->i_mutex);
}
for (i = 0;; i++) {
if (!opipe->readers) {
send_sig(SIGPIPE, current, 0);
if (!ret)
ret = -EPIPE;
break;
}
if (ipipe->nrbufs - i) {
ibuf = ipipe->bufs + ((ipipe->curbuf + i) & (PIPE_BUFFERS - 1));
/*
* If we have room, fill this buffer
*/
if (opipe->nrbufs < PIPE_BUFFERS) {
int nbuf = (opipe->curbuf + opipe->nrbufs) & (PIPE_BUFFERS - 1);
/*
* Get a reference to this pipe buffer,
* so we can copy the contents over.
*/
ibuf->ops->get(ipipe, ibuf);
obuf = opipe->bufs + nbuf;
*obuf = *ibuf;
if (obuf->len > len)
obuf->len = len;
opipe->nrbufs++;
do_wakeup = 1;
ret += obuf->len;
len -= obuf->len;
if (!len)
break;
if (opipe->nrbufs < PIPE_BUFFERS)
continue;
}
/*
* We have input available, but no output room.
* If we already copied data, return that.
*/
if (flags & SPLICE_F_NONBLOCK) {
if (!ret)
ret = -EAGAIN;
break;
}
if (signal_pending(current)) {
if (!ret)
ret = -ERESTARTSYS;
break;
}
if (do_wakeup) {
smp_mb();
if (waitqueue_active(&opipe->wait))
wake_up_interruptible(&opipe->wait);
kill_fasync(&opipe->fasync_readers, SIGIO, POLL_IN);
do_wakeup = 0;
}
opipe->waiting_writers++;
pipe_wait(opipe);
opipe->waiting_writers--;
continue;
}
/*
* No input buffers, do the usual checks for available
* writers and blocking and wait if necessary
*/
if (!ipipe->writers)
break;
if (!ipipe->waiting_writers) {
if (ret)
break;
}
if (flags & SPLICE_F_NONBLOCK) {
if (!ret)
ret = -EAGAIN;
break;
}
if (signal_pending(current)) {
if (!ret)
ret = -ERESTARTSYS;
break;
}
if (waitqueue_active(&ipipe->wait))
wake_up_interruptible_sync(&ipipe->wait);
kill_fasync(&ipipe->fasync_writers, SIGIO, POLL_OUT);
pipe_wait(ipipe);
}
mutex_unlock(&ipipe->inode->i_mutex);
mutex_unlock(&opipe->inode->i_mutex);
if (do_wakeup) {
smp_mb();
if (waitqueue_active(&opipe->wait))
wake_up_interruptible(&opipe->wait);
kill_fasync(&opipe->fasync_readers, SIGIO, POLL_IN);
}
return ret;
}
/*
* This is a tee(1) implementation that works on pipes. It doesn't copy
* any data, it simply references the 'in' pages on the 'out' pipe.
* The 'flags' used are the SPLICE_F_* variants, currently the only
* applicable one is SPLICE_F_NONBLOCK.
*/
static long do_tee(struct file *in, struct file *out, size_t len,
unsigned int flags)
{
struct pipe_inode_info *ipipe = in->f_dentry->d_inode->i_pipe;
struct pipe_inode_info *opipe = out->f_dentry->d_inode->i_pipe;
/*
* Link ipipe to the two output pipes, consuming as we go along.
*/
if (ipipe && opipe)
return link_pipe(ipipe, opipe, len, flags);
return -EINVAL;
}
asmlinkage long sys_tee(int fdin, int fdout, size_t len, unsigned int flags)
{
struct file *in;
int error, fput_in;
if (unlikely(!len))
return 0;
error = -EBADF;
in = fget_light(fdin, &fput_in);
if (in) {
if (in->f_mode & FMODE_READ) {
int fput_out;
struct file *out = fget_light(fdout, &fput_out);
if (out) {
if (out->f_mode & FMODE_WRITE)
error = do_tee(in, out, len, flags);
fput_light(out, fput_out);
}
}
fput_light(in, fput_in);
}
return error;
}

12
fs/xfs/linux-2.6/xfs_file.c
View File

@ -252,6 +252,7 @@ xfs_file_sendfile_invis(
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 @@ xfs_file_splice_read(
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 @@ xfs_file_splice_read_invis(
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 @@ 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, len, flags, 0, NULL, rval);
VOP_SPLICE_WRITE(vp, pipe, outfilp, ppos, len, flags, 0, NULL, rval);
return rval;
}
@ -295,13 +298,14 @@ 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, len, flags, IO_INVIS, NULL, rval);
VOP_SPLICE_WRITE(vp, pipe, outfilp, ppos, len, flags, IO_INVIS, NULL, rval);
return rval;
}

14
fs/xfs/linux-2.6/xfs_lrw.c
View File

@ -338,6 +338,7 @@ 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,
@ -360,7 +361,7 @@ xfs_splice_read(
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_splice_read(
}
}
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 @@ 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,
@ -403,7 +405,7 @@ xfs_splice_write(
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_splice_write(
}
}
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);

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

@ -93,11 +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 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__ */

12
fs/xfs/linux-2.6/xfs_vnode.h
View File

@ -173,11 +173,11 @@ 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 *,
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 @@ 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,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) \

3
include/asm-i386/unistd.h
View File

@ -320,8 +320,9 @@
#define __NR_get_robust_list 312
#define __NR_splice 313
#define __NR_sync_file_range 314
#define __NR_tee 315
#define NR_syscalls 315
#define NR_syscalls 316
/*
* user-visible error numbers are in the range -1 - -128: see

3
include/asm-ia64/unistd.h
View File

@ -289,12 +289,13 @@
#define __NR_set_robust_list 1298
#define __NR_get_robust_list 1299
#define __NR_sync_file_range 1300
#define __NR_tee 1301
#ifdef __KERNEL__
#include <linux/config.h>
#define NR_syscalls 277 /* length of syscall table */
#define NR_syscalls 278 /* length of syscall table */
#define __ARCH_WANT_SYS_RT_SIGACTION

3
include/asm-powerpc/unistd.h
View File

@ -302,8 +302,9 @@
#define __NR_ppoll 281
#define __NR_unshare 282
#define __NR_splice 283
#define __NR_tee 284
#define __NR_syscalls 284
#define __NR_syscalls 285
#ifdef __KERNEL__
#define __NR__exit __NR_exit

4
include/asm-x86_64/unistd.h
View File

@ -611,8 +611,10 @@ __SYSCALL(__NR_set_robust_list, sys_set_robust_list)
__SYSCALL(__NR_get_robust_list, sys_get_robust_list)
#define __NR_splice 275
__SYSCALL(__NR_splice, sys_splice)
#define __NR_tee 276
__SYSCALL(__NR_tee, sys_tee)
#define __NR_syscall_max __NR_splice
#define __NR_syscall_max __NR_tee
#ifndef __NO_STUBS

12
include/linux/fs.h
View File

@ -1039,8 +1039,8 @@ struct file_operations {
int (*check_flags)(int);
int (*dir_notify)(struct file *filp, unsigned long arg);
int (*flock) (struct file *, int, struct file_lock *);
ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, size_t, unsigned int);
ssize_t (*splice_read)(struct file *, struct pipe_inode_info *, size_t, unsigned int);
ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, loff_t *, size_t, unsigned int);
ssize_t (*splice_read)(struct file *, loff_t *, struct pipe_inode_info *, size_t, unsigned int);
};
struct inode_operations {
@ -1613,13 +1613,13 @@ extern void do_generic_mapping_read(struct address_space *mapping,
loff_t *, read_descriptor_t *, read_actor_t);
/* fs/splice.c */
extern ssize_t generic_file_splice_read(struct file *,
extern ssize_t generic_file_splice_read(struct file *, loff_t *,
struct pipe_inode_info *, size_t, unsigned int);
extern ssize_t generic_file_splice_write(struct pipe_inode_info *,
struct file *, size_t, unsigned int);
struct file *, loff_t *, size_t, unsigned int);
extern ssize_t generic_splice_sendpage(struct pipe_inode_info *pipe,
struct file *out, size_t len, unsigned int flags);
extern long do_splice_direct(struct file *in, struct file *out,
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 void

1
include/linux/pipe_fs_i.h
View File

@ -21,6 +21,7 @@ struct pipe_buf_operations {
void (*unmap)(struct pipe_inode_info *, struct pipe_buffer *);
void (*release)(struct pipe_inode_info *, struct pipe_buffer *);
int (*steal)(struct pipe_inode_info *, struct pipe_buffer *);
void (*get)(struct pipe_inode_info *, struct pipe_buffer *);
};
struct pipe_inode_info {

2
include/linux/syscalls.h
View File

@ -574,6 +574,8 @@ asmlinkage long sys_splice(int fd_in, loff_t __user *off_in,
int fd_out, loff_t __user *off_out,
size_t len, unsigned int flags);
asmlinkage long sys_tee(int fdin, int fdout, size_t len, unsigned int flags);
asmlinkage long sys_sync_file_range(int fd, loff_t offset, loff_t nbytes,
unsigned int flags);