X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=fs%2Fread_write.c;h=124693e8d3fa068d60e7f6ad82670a3577ae80fb;hb=a7fa2baf8e2a6c0eb0a21f75e919c226179e8ff4;hp=1f8dc373ede7755124a0d5da510f05beb7ce784f;hpb=b0138a6cb7923a997d278b47c176778534d1095b;p=mv-sheeva.git

diff --git a/fs/read_write.c b/fs/read_write.c
index 1f8dc373ede..124693e8d3f 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -15,6 +15,7 @@
 #include <linux/module.h>
 #include <linux/syscalls.h>
 #include <linux/pagemap.h>
+#include <linux/splice.h>
 #include "read_write.h"
 
 #include <asm/uaccess.h>
@@ -25,7 +26,7 @@ const struct file_operations generic_ro_fops = {
 	.read		= do_sync_read,
 	.aio_read	= generic_file_aio_read,
 	.mmap		= generic_file_readonly_mmap,
-	.sendfile	= generic_file_sendfile,
+	.splice_read	= generic_file_splice_read,
 };
 
 EXPORT_SYMBOL(generic_ro_fops);
@@ -37,10 +38,10 @@ loff_t generic_file_llseek(struct file *file, loff_t offset, int origin)
 
 	mutex_lock(&inode->i_mutex);
 	switch (origin) {
-		case 2:
+		case SEEK_END:
 			offset += inode->i_size;
 			break;
-		case 1:
+		case SEEK_CUR:
 			offset += file->f_pos;
 	}
 	retval = -EINVAL;
@@ -63,10 +64,10 @@ loff_t remote_llseek(struct file *file, loff_t offset, int origin)
 
 	lock_kernel();
 	switch (origin) {
-		case 2:
+		case SEEK_END:
 			offset += i_size_read(file->f_path.dentry->d_inode);
 			break;
-		case 1:
+		case SEEK_CUR:
 			offset += file->f_pos;
 	}
 	retval = -EINVAL;
@@ -94,10 +95,10 @@ loff_t default_llseek(struct file *file, loff_t offset, int origin)
 
 	lock_kernel();
 	switch (origin) {
-		case 2:
+		case SEEK_END:
 			offset += i_size_read(file->f_path.dentry->d_inode);
 			break;
-		case 1:
+		case SEEK_CUR:
 			offset += file->f_pos;
 	}
 	retval = -EINVAL;
@@ -139,7 +140,7 @@ asmlinkage off_t sys_lseek(unsigned int fd, off_t offset, unsigned int origin)
 		goto bad;
 
 	retval = -EINVAL;
-	if (origin <= 2) {
+	if (origin <= SEEK_MAX) {
 		loff_t res = vfs_llseek(file, offset, origin);
 		retval = res;
 		if (res != (loff_t)retval)
@@ -166,7 +167,7 @@ asmlinkage long sys_llseek(unsigned int fd, unsigned long offset_high,
 		goto bad;
 
 	retval = -EINVAL;
-	if (origin > 2)
+	if (origin > SEEK_MAX)
 		goto out_putf;
 
 	offset = vfs_llseek(file, ((loff_t) offset_high << 32) | offset_low,
@@ -204,7 +205,7 @@ int rw_verify_area(int read_write, struct file *file, loff_t *ppos, size_t count
 	if (unlikely((pos < 0) || (loff_t) (pos + count) < 0))
 		goto Einval;
 
-	if (unlikely(inode->i_flock && MANDATORY_LOCK(inode))) {
+	if (unlikely(inode->i_flock && mandatory_lock(inode))) {
 		int retval = locks_mandatory_area(
 			read_write == READ ? FLOCK_VERIFY_READ : FLOCK_VERIFY_WRITE,
 			inode, file, pos, count);
@@ -708,7 +709,7 @@ static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos,
 	struct inode * in_inode, * out_inode;
 	loff_t pos;
 	ssize_t retval;
-	int fput_needed_in, fput_needed_out;
+	int fput_needed_in, fput_needed_out, fl;
 
 	/*
 	 * Get input file, and verify that it is ok..
@@ -723,7 +724,7 @@ static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos,
 	in_inode = in_file->f_path.dentry->d_inode;
 	if (!in_inode)
 		goto fput_in;
-	if (!in_file->f_op || !in_file->f_op->sendfile)
+	if (!in_file->f_op || !in_file->f_op->splice_read)
 		goto fput_in;
 	retval = -ESPIPE;
 	if (!ppos)
@@ -776,7 +777,18 @@ static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos,
 		count = max - pos;
 	}
 
-	retval = in_file->f_op->sendfile(in_file, ppos, count, file_send_actor, out_file);
+	fl = 0;
+#if 0
+	/*
+	 * We need to debate whether we can enable this or not. The
+	 * man page documents EAGAIN return for the output at least,
+	 * and the application is arguably buggy if it doesn't expect
+	 * EAGAIN on a non-blocking file descriptor.
+	 */
+	if (in_file->f_flags & O_NONBLOCK)
+		fl = SPLICE_F_NONBLOCK;
+#endif
+	retval = do_splice_direct(in_file, ppos, out_file, count, fl);
 
 	if (retval > 0) {
 		add_rchar(current, retval);