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-rw-r--r--fs/fifo.c48
-rw-r--r--fs/pipe.c104
-rw-r--r--include/linux/pipe_fs_i.h10
3 files changed, 76 insertions, 86 deletions
diff --git a/fs/fifo.c b/fs/fifo.c
index b16e2f597d61..2c27f56d7304 100644
--- a/fs/fifo.c
+++ b/fs/fifo.c
@@ -28,14 +28,14 @@ static void wait_for_partner(struct inode* inode, unsigned int *cnt)
static void wake_up_partner(struct inode* inode)
{
- wake_up_interruptible(PIPE_WAIT(*inode));
+ wake_up_interruptible(&inode->i_pipe->wait);
}
static int fifo_open(struct inode *inode, struct file *filp)
{
int ret;
- mutex_lock(PIPE_MUTEX(*inode));
+ mutex_lock(&inode->i_mutex);
if (!inode->i_pipe) {
ret = -ENOMEM;
inode->i_pipe = alloc_pipe_info(inode);
@@ -55,18 +55,18 @@ static int fifo_open(struct inode *inode, struct file *filp)
* opened, even when there is no process writing the FIFO.
*/
filp->f_op = &read_fifo_fops;
- PIPE_RCOUNTER(*inode)++;
- if (PIPE_READERS(*inode)++ == 0)
+ inode->i_pipe->r_counter++;
+ if (inode->i_pipe->readers++ == 0)
wake_up_partner(inode);
- if (!PIPE_WRITERS(*inode)) {
+ if (!inode->i_pipe->writers) {
if ((filp->f_flags & O_NONBLOCK)) {
/* suppress POLLHUP until we have
* seen a writer */
- filp->f_version = PIPE_WCOUNTER(*inode);
+ filp->f_version = inode->i_pipe->w_counter;
} else
{
- wait_for_partner(inode, &PIPE_WCOUNTER(*inode));
+ wait_for_partner(inode, &inode->i_pipe->w_counter);
if(signal_pending(current))
goto err_rd;
}
@@ -80,16 +80,16 @@ static int fifo_open(struct inode *inode, struct file *filp)
* errno=ENXIO when there is no process reading the FIFO.
*/
ret = -ENXIO;
- if ((filp->f_flags & O_NONBLOCK) && !PIPE_READERS(*inode))
+ if ((filp->f_flags & O_NONBLOCK) && !inode->i_pipe->readers)
goto err;
filp->f_op = &write_fifo_fops;
- PIPE_WCOUNTER(*inode)++;
- if (!PIPE_WRITERS(*inode)++)
+ inode->i_pipe->w_counter++;
+ if (!inode->i_pipe->writers++)
wake_up_partner(inode);
- if (!PIPE_READERS(*inode)) {
- wait_for_partner(inode, &PIPE_RCOUNTER(*inode));
+ if (!inode->i_pipe->readers) {
+ wait_for_partner(inode, &inode->i_pipe->r_counter);
if (signal_pending(current))
goto err_wr;
}
@@ -104,11 +104,11 @@ static int fifo_open(struct inode *inode, struct file *filp)
*/
filp->f_op = &rdwr_fifo_fops;
- PIPE_READERS(*inode)++;
- PIPE_WRITERS(*inode)++;
- PIPE_RCOUNTER(*inode)++;
- PIPE_WCOUNTER(*inode)++;
- if (PIPE_READERS(*inode) == 1 || PIPE_WRITERS(*inode) == 1)
+ inode->i_pipe->readers++;
+ inode->i_pipe->writers++;
+ inode->i_pipe->r_counter++;
+ inode->i_pipe->w_counter++;
+ if (inode->i_pipe->readers == 1 || inode->i_pipe->writers == 1)
wake_up_partner(inode);
break;
@@ -118,27 +118,27 @@ static int fifo_open(struct inode *inode, struct file *filp)
}
/* Ok! */
- mutex_unlock(PIPE_MUTEX(*inode));
+ mutex_unlock(&inode->i_mutex);
return 0;
err_rd:
- if (!--PIPE_READERS(*inode))
- wake_up_interruptible(PIPE_WAIT(*inode));
+ if (!--inode->i_pipe->readers)
+ wake_up_interruptible(&inode->i_pipe->wait);
ret = -ERESTARTSYS;
goto err;
err_wr:
- if (!--PIPE_WRITERS(*inode))
- wake_up_interruptible(PIPE_WAIT(*inode));
+ if (!--inode->i_pipe->writers)
+ wake_up_interruptible(&inode->i_pipe->wait);
ret = -ERESTARTSYS;
goto err;
err:
- if (!PIPE_READERS(*inode) && !PIPE_WRITERS(*inode))
+ if (!inode->i_pipe->readers && !inode->i_pipe->writers)
free_pipe_info(inode);
err_nocleanup:
- mutex_unlock(PIPE_MUTEX(*inode));
+ mutex_unlock(&inode->i_mutex);
return ret;
}
diff --git a/fs/pipe.c b/fs/pipe.c
index 036536f072c9..0602fc9f7eba 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -158,7 +158,7 @@ pipe_readv(struct file *filp, const struct iovec *_iov,
do_wakeup = 0;
ret = 0;
- mutex_lock(PIPE_MUTEX(*inode));
+ mutex_lock(&inode->i_mutex);
info = inode->i_pipe;
for (;;) {
int bufs = info->nrbufs;
@@ -202,9 +202,9 @@ pipe_readv(struct file *filp, const struct iovec *_iov,
}
if (bufs) /* More to do? */
continue;
- if (!PIPE_WRITERS(*inode))
+ if (!inode->i_pipe->writers)
break;
- if (!PIPE_WAITING_WRITERS(*inode)) {
+ if (!inode->i_pipe->waiting_writers) {
/* syscall merging: Usually we must not sleep
* if O_NONBLOCK is set, or if we got some data.
* But if a writer sleeps in kernel space, then
@@ -222,16 +222,16 @@ pipe_readv(struct file *filp, const struct iovec *_iov,
break;
}
if (do_wakeup) {
- wake_up_interruptible_sync(PIPE_WAIT(*inode));
- kill_fasync(PIPE_FASYNC_WRITERS(*inode), SIGIO, POLL_OUT);
+ wake_up_interruptible_sync(&inode->i_pipe->wait);
+ kill_fasync(&inode->i_pipe->fasync_writers, SIGIO, POLL_OUT);
}
pipe_wait(inode->i_pipe);
}
- mutex_unlock(PIPE_MUTEX(*inode));
+ mutex_unlock(&inode->i_mutex);
/* Signal writers asynchronously that there is more room. */
if (do_wakeup) {
- wake_up_interruptible(PIPE_WAIT(*inode));
- kill_fasync(PIPE_FASYNC_WRITERS(*inode), SIGIO, POLL_OUT);
+ wake_up_interruptible(&inode->i_pipe->wait);
+ kill_fasync(&inode->i_pipe->fasync_writers, SIGIO, POLL_OUT);
}
if (ret > 0)
file_accessed(filp);
@@ -264,10 +264,10 @@ pipe_writev(struct file *filp, const struct iovec *_iov,
do_wakeup = 0;
ret = 0;
- mutex_lock(PIPE_MUTEX(*inode));
+ mutex_lock(&inode->i_mutex);
info = inode->i_pipe;
- if (!PIPE_READERS(*inode)) {
+ if (!inode->i_pipe->readers) {
send_sig(SIGPIPE, current, 0);
ret = -EPIPE;
goto out;
@@ -306,7 +306,7 @@ pipe_writev(struct file *filp, const struct iovec *_iov,
for (;;) {
int bufs;
- if (!PIPE_READERS(*inode)) {
+ if (!inode->i_pipe->readers) {
send_sig(SIGPIPE, current, 0);
if (!ret) ret = -EPIPE;
break;
@@ -367,19 +367,19 @@ pipe_writev(struct file *filp, const struct iovec *_iov,
break;
}
if (do_wakeup) {
- wake_up_interruptible_sync(PIPE_WAIT(*inode));
- kill_fasync(PIPE_FASYNC_READERS(*inode), SIGIO, POLL_IN);
+ wake_up_interruptible_sync(&inode->i_pipe->wait);
+ kill_fasync(&inode->i_pipe->fasync_readers, SIGIO, POLL_IN);
do_wakeup = 0;
}
- PIPE_WAITING_WRITERS(*inode)++;
+ inode->i_pipe->waiting_writers++;
pipe_wait(inode->i_pipe);
- PIPE_WAITING_WRITERS(*inode)--;
+ inode->i_pipe->waiting_writers--;
}
out:
- mutex_unlock(PIPE_MUTEX(*inode));
+ mutex_unlock(&inode->i_mutex);
if (do_wakeup) {
- wake_up_interruptible(PIPE_WAIT(*inode));
- kill_fasync(PIPE_FASYNC_READERS(*inode), SIGIO, POLL_IN);
+ wake_up_interruptible(&inode->i_pipe->wait);
+ kill_fasync(&inode->i_pipe->fasync_readers, SIGIO, POLL_IN);
}
if (ret > 0)
file_update_time(filp);
@@ -416,7 +416,7 @@ pipe_ioctl(struct inode *pino, struct file *filp,
switch (cmd) {
case FIONREAD:
- mutex_lock(PIPE_MUTEX(*inode));
+ mutex_lock(&inode->i_mutex);
info = inode->i_pipe;
count = 0;
buf = info->curbuf;
@@ -425,7 +425,7 @@ pipe_ioctl(struct inode *pino, struct file *filp,
count += info->bufs[buf].len;
buf = (buf+1) & (PIPE_BUFFERS-1);
}
- mutex_unlock(PIPE_MUTEX(*inode));
+ mutex_unlock(&inode->i_mutex);
return put_user(count, (int __user *)arg);
default:
return -EINVAL;
@@ -441,14 +441,14 @@ pipe_poll(struct file *filp, poll_table *wait)
struct pipe_inode_info *info = inode->i_pipe;
int nrbufs;
- poll_wait(filp, PIPE_WAIT(*inode), wait);
+ poll_wait(filp, &inode->i_pipe->wait, wait);
/* Reading only -- no need for acquiring the semaphore. */
nrbufs = info->nrbufs;
mask = 0;
if (filp->f_mode & FMODE_READ) {
mask = (nrbufs > 0) ? POLLIN | POLLRDNORM : 0;
- if (!PIPE_WRITERS(*inode) && filp->f_version != PIPE_WCOUNTER(*inode))
+ if (!inode->i_pipe->writers && filp->f_version != inode->i_pipe->w_counter)
mask |= POLLHUP;
}
@@ -458,7 +458,7 @@ pipe_poll(struct file *filp, poll_table *wait)
* Most Unices do not set POLLERR for FIFOs but on Linux they
* behave exactly like pipes for poll().
*/
- if (!PIPE_READERS(*inode))
+ if (!inode->i_pipe->readers)
mask |= POLLERR;
}
@@ -468,17 +468,17 @@ pipe_poll(struct file *filp, poll_table *wait)
static int
pipe_release(struct inode *inode, int decr, int decw)
{
- mutex_lock(PIPE_MUTEX(*inode));
- PIPE_READERS(*inode) -= decr;
- PIPE_WRITERS(*inode) -= decw;
- if (!PIPE_READERS(*inode) && !PIPE_WRITERS(*inode)) {
+ mutex_lock(&inode->i_mutex);
+ inode->i_pipe->readers -= decr;
+ inode->i_pipe->writers -= decw;
+ if (!inode->i_pipe->readers && !inode->i_pipe->writers) {
free_pipe_info(inode);
} else {
- wake_up_interruptible(PIPE_WAIT(*inode));
- kill_fasync(PIPE_FASYNC_READERS(*inode), SIGIO, POLL_IN);
- kill_fasync(PIPE_FASYNC_WRITERS(*inode), SIGIO, POLL_OUT);
+ wake_up_interruptible(&inode->i_pipe->wait);
+ kill_fasync(&inode->i_pipe->fasync_readers, SIGIO, POLL_IN);
+ kill_fasync(&inode->i_pipe->fasync_writers, SIGIO, POLL_OUT);
}
- mutex_unlock(PIPE_MUTEX(*inode));
+ mutex_unlock(&inode->i_mutex);
return 0;
}
@@ -489,9 +489,9 @@ pipe_read_fasync(int fd, struct file *filp, int on)
struct inode *inode = filp->f_dentry->d_inode;
int retval;
- mutex_lock(PIPE_MUTEX(*inode));
- retval = fasync_helper(fd, filp, on, PIPE_FASYNC_READERS(*inode));
- mutex_unlock(PIPE_MUTEX(*inode));
+ mutex_lock(&inode->i_mutex);
+ retval = fasync_helper(fd, filp, on, &inode->i_pipe->fasync_readers);
+ mutex_unlock(&inode->i_mutex);
if (retval < 0)
return retval;
@@ -506,9 +506,9 @@ pipe_write_fasync(int fd, struct file *filp, int on)
struct inode *inode = filp->f_dentry->d_inode;
int retval;
- mutex_lock(PIPE_MUTEX(*inode));
- retval = fasync_helper(fd, filp, on, PIPE_FASYNC_WRITERS(*inode));
- mutex_unlock(PIPE_MUTEX(*inode));
+ mutex_lock(&inode->i_mutex);
+ retval = fasync_helper(fd, filp, on, &inode->i_pipe->fasync_writers);
+ mutex_unlock(&inode->i_mutex);
if (retval < 0)
return retval;
@@ -523,14 +523,14 @@ pipe_rdwr_fasync(int fd, struct file *filp, int on)
struct inode *inode = filp->f_dentry->d_inode;
int retval;
- mutex_lock(PIPE_MUTEX(*inode));
+ mutex_lock(&inode->i_mutex);
- retval = fasync_helper(fd, filp, on, PIPE_FASYNC_READERS(*inode));
+ retval = fasync_helper(fd, filp, on, &inode->i_pipe->fasync_readers);
if (retval >= 0)
- retval = fasync_helper(fd, filp, on, PIPE_FASYNC_WRITERS(*inode));
+ retval = fasync_helper(fd, filp, on, &inode->i_pipe->fasync_writers);
- mutex_unlock(PIPE_MUTEX(*inode));
+ mutex_unlock(&inode->i_mutex);
if (retval < 0)
return retval;
@@ -569,9 +569,9 @@ pipe_read_open(struct inode *inode, struct file *filp)
{
/* We could have perhaps used atomic_t, but this and friends
below are the only places. So it doesn't seem worthwhile. */
- mutex_lock(PIPE_MUTEX(*inode));
- PIPE_READERS(*inode)++;
- mutex_unlock(PIPE_MUTEX(*inode));
+ mutex_lock(&inode->i_mutex);
+ inode->i_pipe->readers++;
+ mutex_unlock(&inode->i_mutex);
return 0;
}
@@ -579,9 +579,9 @@ pipe_read_open(struct inode *inode, struct file *filp)
static int
pipe_write_open(struct inode *inode, struct file *filp)
{
- mutex_lock(PIPE_MUTEX(*inode));
- PIPE_WRITERS(*inode)++;
- mutex_unlock(PIPE_MUTEX(*inode));
+ mutex_lock(&inode->i_mutex);
+ inode->i_pipe->writers++;
+ mutex_unlock(&inode->i_mutex);
return 0;
}
@@ -589,12 +589,12 @@ pipe_write_open(struct inode *inode, struct file *filp)
static int
pipe_rdwr_open(struct inode *inode, struct file *filp)
{
- mutex_lock(PIPE_MUTEX(*inode));
+ mutex_lock(&inode->i_mutex);
if (filp->f_mode & FMODE_READ)
- PIPE_READERS(*inode)++;
+ inode->i_pipe->readers++;
if (filp->f_mode & FMODE_WRITE)
- PIPE_WRITERS(*inode)++;
- mutex_unlock(PIPE_MUTEX(*inode));
+ inode->i_pipe->writers++;
+ mutex_unlock(&inode->i_mutex);
return 0;
}
@@ -731,7 +731,7 @@ static struct inode * get_pipe_inode(void)
if (!inode->i_pipe)
goto fail_iput;
- PIPE_READERS(*inode) = PIPE_WRITERS(*inode) = 1;
+ inode->i_pipe->readers = inode->i_pipe->writers = 1;
inode->i_fop = &rdwr_pipe_fops;
/*
diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h
index 660e9d866e5d..123a7c24bc72 100644
--- a/include/linux/pipe_fs_i.h
+++ b/include/linux/pipe_fs_i.h
@@ -43,16 +43,6 @@ struct pipe_inode_info {
memory allocation, whereas PIPE_BUF makes atomicity guarantees. */
#define PIPE_SIZE PAGE_SIZE
-#define PIPE_MUTEX(inode) (&(inode).i_mutex)
-#define PIPE_WAIT(inode) (&(inode).i_pipe->wait)
-#define PIPE_READERS(inode) ((inode).i_pipe->readers)
-#define PIPE_WRITERS(inode) ((inode).i_pipe->writers)
-#define PIPE_WAITING_WRITERS(inode) ((inode).i_pipe->waiting_writers)
-#define PIPE_RCOUNTER(inode) ((inode).i_pipe->r_counter)
-#define PIPE_WCOUNTER(inode) ((inode).i_pipe->w_counter)
-#define PIPE_FASYNC_READERS(inode) (&((inode).i_pipe->fasync_readers))
-#define PIPE_FASYNC_WRITERS(inode) (&((inode).i_pipe->fasync_writers))
-
/* Drop the inode semaphore and wait for a pipe event, atomically */
void pipe_wait(struct pipe_inode_info *pipe);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.