On Tue, 2006-05-23 at 16:29 +0800, Ian Kent wrote:
> Badari Pulavarty wrote:
> > On Mon, 2006-05-22 at 10:06 -0700, Andrew Morton wrote:
> >> Badari Pulavarty <[email protected]> wrote:
> >>> On Sun, 2006-05-21 at 18:00 -0700, Andrew Morton wrote:
> >>>> Badari Pulavarty <[email protected]> wrote:
> >>>>> This patch removes readv() and writev() methods and replaces
> >>>>> them with aio_read()/aio_write() methods.
> >>>> And it breaks autofs4
> >>>>
> >>>> autofs: pipe file descriptor does not contain proper ops
> >>>>
> >>> Any easy test case to reproduce the problem ?
> >>>
> >> Grab an FC5 setup, copy RH's .config into your tree.
> >
> > Will do.
> >
> > Like I mentioned, I am travelling this week. I would really
> > appreciate if someone could test my updated patch (I sent out
> > in my earlier mail).
>
> Doesn't seem to apply to 2.6.17-rc4.
>
> [raven@raven linux-2.6.16]$ patch -p1 <
> ~/remove-readv_writev-methods-and-use-aio_read_aio_write.patch
> patching file drivers/char/raw.c
> Hunk #1 succeeded at 270 (offset 12 lines).
> patching file drivers/net/tun.c
> patching file fs/bad_inode.c
> patching file fs/block_dev.c
> Hunk #1 succeeded at 1101 (offset 8 lines).
> patching file fs/cifs/cifsfs.c
> Hunk #1 FAILED at 484.
> 1 out of 3 hunks FAILED -- saving rejects to file fs/cifs/cifsfs.c.rej
Function cifs_file_writev appears to be already present.
> patching file fs/compat.c
> patching file fs/ext2/file.c
> patching file fs/ext3/file.c
> Hunk #1 succeeded at 111 (offset -1 lines).
> patching file fs/fat/file.c
> patching file fs/fuse/dev.c
> patching file fs/hostfs/hostfs_kern.c
> patching file fs/jfs/file.c
> patching file fs/ntfs/file.c
> Hunk #1 succeeded at 2298 (offset 2 lines).
> patching file fs/pipe.c
> patching file fs/read_write.c
> Hunk #2 succeeded at 439 (offset -12 lines).
> Hunk #4 succeeded at 574 (offset -12 lines).
> Hunk #6 succeeded at 619 (offset -12 lines).
> patching file fs/read_write.h
> patching file fs/xfs/linux-2.6/xfs_file.c
> Hunk #1 succeeded at 131 with fuzz 1 (offset 2 lines).
> Hunk #3 succeeded at 513 (offset 2 lines).
> patching file include/linux/fs.h
> patching file mm/filemap.c
> Hunk #1 succeeded at 2300 (offset 2 lines).
> patching file net/socket.c
> Hunk #3 FAILED at 732.
> Hunk #4 FAILED at 774.
> 2 out of 4 hunks FAILED -- saving rejects to file net/socket.c.rej
And similarly sock_readv and sock_writev.
> patching file sound/core/pcm_native.c
> [raven@raven linux-2.6.16]$
>
At a glance they look the same as the ones in the patch.
In case it's helpful for comparison here is a patch made after the
above.
--- linux-2.6.16/drivers/char/raw.cremove-readv_writev-methods-and-use-aio_read_aio_write 2006-05-23 22:06:21.000000000 +0800
+++ linux-2.6.16/drivers/char/raw.c 2006-05-23 22:07:29.000000000 +0800
@@ -270,8 +270,6 @@ static struct file_operations raw_fops =
.open = raw_open,
.release= raw_release,
.ioctl = raw_ioctl,
- .readv = generic_file_readv,
- .writev = generic_file_writev,
.owner = THIS_MODULE,
};
--- linux-2.6.16/net/socket.cremove-readv_writev-methods-and-use-aio_read_aio_write 2006-05-23 22:06:33.000000000 +0800
+++ linux-2.6.16/net/socket.c 2006-05-23 22:07:29.000000000 +0800
@@ -112,10 +112,6 @@ static long compat_sock_ioctl(struct fil
unsigned int cmd, unsigned long arg);
#endif
static int sock_fasync(int fd, struct file *filp, int on);
-static ssize_t sock_readv(struct file *file, const struct iovec *vector,
- unsigned long count, loff_t *ppos);
-static ssize_t sock_writev(struct file *file, const struct iovec *vector,
- unsigned long count, loff_t *ppos);
static ssize_t sock_sendpage(struct file *file, struct page *page,
int offset, size_t size, loff_t *ppos, int more);
@@ -138,8 +134,6 @@ static struct file_operations socket_fil
.open = sock_no_open, /* special open code to disallow open via /proc */
.release = sock_close,
.fasync = sock_fasync,
- .readv = sock_readv,
- .writev = sock_writev,
.sendpage = sock_sendpage,
.splice_write = generic_splice_sendpage,
};
--- linux-2.6.16/mm/filemap.cremove-readv_writev-methods-and-use-aio_read_aio_write 2006-05-23 22:06:32.000000000 +0800
+++ linux-2.6.16/mm/filemap.c 2006-05-23 22:07:29.000000000 +0800
@@ -2300,42 +2300,6 @@ ssize_t generic_file_write(struct file *
}
EXPORT_SYMBOL(generic_file_write);
-ssize_t generic_file_readv(struct file *filp, const struct iovec *iov,
- unsigned long nr_segs, loff_t *ppos)
-{
- struct kiocb kiocb;
- ssize_t ret;
-
- init_sync_kiocb(&kiocb, filp);
- ret = __generic_file_aio_read(&kiocb, iov, nr_segs, ppos);
- if (-EIOCBQUEUED == ret)
- ret = wait_on_sync_kiocb(&kiocb);
- return ret;
-}
-EXPORT_SYMBOL(generic_file_readv);
-
-ssize_t generic_file_writev(struct file *file, const struct iovec *iov,
- unsigned long nr_segs, loff_t *ppos)
-{
- struct address_space *mapping = file->f_mapping;
- struct inode *inode = mapping->host;
- ssize_t ret;
-
- mutex_lock(&inode->i_mutex);
- ret = __generic_file_write_nolock(file, iov, nr_segs, ppos);
- mutex_unlock(&inode->i_mutex);
-
- if (ret > 0 && ((file->f_flags & O_SYNC) || IS_SYNC(inode))) {
- int err;
-
- err = sync_page_range(inode, mapping, *ppos - ret, ret);
- if (err < 0)
- ret = err;
- }
- return ret;
-}
-EXPORT_SYMBOL(generic_file_writev);
-
/*
* Called under i_mutex for writes to S_ISREG files. Returns -EIO if something
* went wrong during pagecache shootdown.
--- linux-2.6.16/fs/xfs/linux-2.6/xfs_file.cremove-readv_writev-methods-and-use-aio_read_aio_write 2006-05-23 22:06:30.000000000 +0800
+++ linux-2.6.16/fs/xfs/linux-2.6/xfs_file.c 2006-05-23 22:07:29.000000000 +0800
@@ -131,94 +131,6 @@ xfs_file_aio_write_invis(
return __xfs_file_write(iocb, buf, IO_ISAIO|IO_INVIS, count, pos);
}
-STATIC inline ssize_t
-__xfs_file_readv(
- struct file *file,
- const struct iovec *iov,
- int ioflags,
- unsigned long nr_segs,
- loff_t *ppos)
-{
- struct inode *inode = file->f_mapping->host;
- vnode_t *vp = vn_from_inode(inode);
- struct kiocb kiocb;
- ssize_t rval;
-
- init_sync_kiocb(&kiocb, file);
- kiocb.ki_pos = *ppos;
-
- if (unlikely(file->f_flags & O_DIRECT))
- ioflags |= IO_ISDIRECT;
- VOP_READ(vp, &kiocb, iov, nr_segs, &kiocb.ki_pos, ioflags, NULL, rval);
-
- *ppos = kiocb.ki_pos;
- return rval;
-}
-
-STATIC ssize_t
-xfs_file_readv(
- struct file *file,
- const struct iovec *iov,
- unsigned long nr_segs,
- loff_t *ppos)
-{
- return __xfs_file_readv(file, iov, 0, nr_segs, ppos);
-}
-
-STATIC ssize_t
-xfs_file_readv_invis(
- struct file *file,
- const struct iovec *iov,
- unsigned long nr_segs,
- loff_t *ppos)
-{
- return __xfs_file_readv(file, iov, IO_INVIS, nr_segs, ppos);
-}
-
-STATIC inline ssize_t
-__xfs_file_writev(
- struct file *file,
- const struct iovec *iov,
- int ioflags,
- unsigned long nr_segs,
- loff_t *ppos)
-{
- struct inode *inode = file->f_mapping->host;
- vnode_t *vp = vn_from_inode(inode);
- struct kiocb kiocb;
- ssize_t rval;
-
- init_sync_kiocb(&kiocb, file);
- kiocb.ki_pos = *ppos;
- if (unlikely(file->f_flags & O_DIRECT))
- ioflags |= IO_ISDIRECT;
-
- VOP_WRITE(vp, &kiocb, iov, nr_segs, &kiocb.ki_pos, ioflags, NULL, rval);
-
- *ppos = kiocb.ki_pos;
- return rval;
-}
-
-STATIC ssize_t
-xfs_file_writev(
- struct file *file,
- const struct iovec *iov,
- unsigned long nr_segs,
- loff_t *ppos)
-{
- return __xfs_file_writev(file, iov, 0, nr_segs, ppos);
-}
-
-STATIC ssize_t
-xfs_file_writev_invis(
- struct file *file,
- const struct iovec *iov,
- unsigned long nr_segs,
- loff_t *ppos)
-{
- return __xfs_file_writev(file, iov, IO_INVIS, nr_segs, ppos);
-}
-
STATIC ssize_t
xfs_file_sendfile(
struct file *filp,
@@ -579,8 +491,6 @@ const struct file_operations xfs_file_op
.llseek = generic_file_llseek,
.read = do_sync_read,
.write = do_sync_write,
- .readv = xfs_file_readv,
- .writev = xfs_file_writev,
.aio_read = xfs_file_aio_read,
.aio_write = xfs_file_aio_write,
.sendfile = xfs_file_sendfile,
@@ -603,8 +513,6 @@ const struct file_operations xfs_invis_f
.llseek = generic_file_llseek,
.read = do_sync_read,
.write = do_sync_write,
- .readv = xfs_file_readv_invis,
- .writev = xfs_file_writev_invis,
.aio_read = xfs_file_aio_read_invis,
.aio_write = xfs_file_aio_write_invis,
.sendfile = xfs_file_sendfile_invis,
--- linux-2.6.16/fs/read_write.cremove-readv_writev-methods-and-use-aio_read_aio_write 2006-05-23 22:06:30.000000000 +0800
+++ linux-2.6.16/fs/read_write.c 2006-05-23 22:07:29.000000000 +0800
@@ -15,6 +15,7 @@
#include <linux/module.h>
#include <linux/syscalls.h>
#include <linux/pagemap.h>
+#include "read_write.h"
#include <asm/uaccess.h>
#include <asm/unistd.h>
@@ -438,6 +439,62 @@ unsigned long iov_shorten(struct iovec *
EXPORT_SYMBOL(iov_shorten);
+ssize_t do_sync_readv_writev(struct file *filp, const struct iovec *iov,
+ unsigned long nr_segs, size_t len, loff_t *ppos, iov_fn_t fn)
+{
+ struct kiocb kiocb;
+ ssize_t ret;
+
+ init_sync_kiocb(&kiocb, filp);
+ kiocb.ki_pos = *ppos;
+ kiocb.ki_left = len;
+ kiocb.ki_nbytes = len;
+
+ for (;;) {
+ ret = fn(&kiocb, iov, nr_segs, kiocb.ki_pos);
+ if (ret != -EIOCBRETRY)
+ break;
+ wait_on_retry_sync_kiocb(&kiocb);
+ }
+
+ if (ret == -EIOCBQUEUED)
+ ret = wait_on_sync_kiocb(&kiocb);
+ *ppos = kiocb.ki_pos;
+ return ret;
+}
+
+/* Do it by hand, with file-ops */
+ssize_t do_loop_readv_writev(struct file *filp, struct iovec *iov,
+ unsigned long nr_segs, loff_t *ppos, io_fn_t fn)
+{
+ struct iovec *vector = iov;
+ ssize_t ret = 0;
+
+ while (nr_segs > 0) {
+ void __user *base;
+ size_t len;
+ ssize_t nr;
+
+ base = vector->iov_base;
+ len = vector->iov_len;
+ vector++;
+ nr_segs--;
+
+ nr = fn(filp, base, len, ppos);
+
+ if (nr < 0) {
+ if (!ret)
+ ret = nr;
+ break;
+ }
+ ret += nr;
+ if (nr != len)
+ break;
+ }
+
+ return ret;
+}
+
/* A write operation does a read from user space and vice versa */
#define vrfy_dir(type) ((type) == READ ? VERIFY_WRITE : VERIFY_READ)
@@ -445,12 +502,9 @@ static ssize_t do_readv_writev(int type,
const struct iovec __user * uvector,
unsigned long nr_segs, loff_t *pos)
{
- typedef ssize_t (*io_fn_t)(struct file *, char __user *, size_t, loff_t *);
- typedef ssize_t (*iov_fn_t)(struct file *, const struct iovec *, unsigned long, loff_t *);
-
size_t tot_len;
struct iovec iovstack[UIO_FASTIOV];
- struct iovec *iov=iovstack, *vector;
+ struct iovec *iov = iovstack;
ssize_t ret;
int seg;
io_fn_t fn;
@@ -520,39 +574,18 @@ static ssize_t do_readv_writev(int type,
fnv = NULL;
if (type == READ) {
fn = file->f_op->read;
- fnv = file->f_op->readv;
+ fnv = file->f_op->aio_read;
} else {
fn = (io_fn_t)file->f_op->write;
- fnv = file->f_op->writev;
- }
- if (fnv) {
- ret = fnv(file, iov, nr_segs, pos);
- goto out;
+ fnv = file->f_op->aio_write;
}
- /* Do it by hand, with file-ops */
- ret = 0;
- vector = iov;
- while (nr_segs > 0) {
- void __user * base;
- size_t len;
- ssize_t nr;
-
- base = vector->iov_base;
- len = vector->iov_len;
- vector++;
- nr_segs--;
-
- nr = fn(file, base, len, pos);
+ if (fnv)
+ ret = do_sync_readv_writev(file, iov, nr_segs, tot_len,
+ pos, fnv);
+ else
+ ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn);
- if (nr < 0) {
- if (!ret) ret = nr;
- break;
- }
- ret += nr;
- if (nr != len)
- break;
- }
out:
if (iov != iovstack)
kfree(iov);
@@ -573,7 +606,7 @@ ssize_t vfs_readv(struct file *file, con
{
if (!(file->f_mode & FMODE_READ))
return -EBADF;
- if (!file->f_op || (!file->f_op->readv && !file->f_op->read))
+ if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read))
return -EINVAL;
return do_readv_writev(READ, file, vec, vlen, pos);
@@ -586,7 +619,7 @@ ssize_t vfs_writev(struct file *file, co
{
if (!(file->f_mode & FMODE_WRITE))
return -EBADF;
- if (!file->f_op || (!file->f_op->writev && !file->f_op->write))
+ if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write))
return -EINVAL;
return do_readv_writev(WRITE, file, vec, vlen, pos);
--- linux-2.6.16/fs/cifs/cifsfs.cremove-readv_writev-methods-and-use-aio_read_aio_write 2006-05-23 22:06:28.000000000 +0800
+++ linux-2.6.16/fs/cifs/cifsfs.c 2006-05-23 22:07:29.000000000 +0800
@@ -581,8 +581,6 @@ struct inode_operations cifs_symlink_ino
const struct file_operations cifs_file_ops = {
.read = do_sync_read,
.write = do_sync_write,
- .readv = generic_file_readv,
- .writev = cifs_file_writev,
.aio_read = generic_file_aio_read,
.aio_write = cifs_file_aio_write,
.open = cifs_open,
@@ -624,8 +622,6 @@ const struct file_operations cifs_file_d
const struct file_operations cifs_file_nobrl_ops = {
.read = do_sync_read,
.write = do_sync_write,
- .readv = generic_file_readv,
- .writev = cifs_file_writev,
.aio_read = generic_file_aio_read,
.aio_write = cifs_file_aio_write,
.open = cifs_open,
--- linux-2.6.16/fs/block_dev.cremove-readv_writev-methods-and-use-aio_read_aio_write 2006-05-23 22:06:28.000000000 +0800
+++ linux-2.6.16/fs/block_dev.c 2006-05-23 22:07:29.000000000 +0800
@@ -1101,8 +1101,6 @@ const struct file_operations def_blk_fop
#ifdef CONFIG_COMPAT
.compat_ioctl = compat_blkdev_ioctl,
#endif
- .readv = generic_file_readv,
- .writev = generic_file_write_nolock,
.sendfile = generic_file_sendfile,
.splice_read = generic_file_splice_read,
.splice_write = generic_file_splice_write,
--- linux-2.6.16/fs/ntfs/file.cremove-readv_writev-methods-and-use-aio_read_aio_write 2006-05-23 22:06:29.000000000 +0800
+++ linux-2.6.16/fs/ntfs/file.c 2006-05-23 22:07:29.000000000 +0800
@@ -2298,11 +2298,9 @@ const struct file_operations ntfs_file_o
.llseek = generic_file_llseek, /* Seek inside file. */
.read = generic_file_read, /* Read from file. */
.aio_read = generic_file_aio_read, /* Async read from file. */
- .readv = generic_file_readv, /* Read from file. */
#ifdef NTFS_RW
.write = ntfs_file_write, /* Write to file. */
.aio_write = ntfs_file_aio_write, /* Async write to file. */
- .writev = ntfs_file_writev, /* Write to file. */
/*.release = ,*/ /* Last file is closed. See
fs/ext2/file.c::
ext2_release_file() for
--- linux-2.6.16/fs/ext3/file.cremove-readv_writev-methods-and-use-aio_read_aio_write 2006-05-23 22:06:28.000000000 +0800
+++ linux-2.6.16/fs/ext3/file.c 2006-05-23 22:07:29.000000000 +0800
@@ -111,8 +111,6 @@ const struct file_operations ext3_file_o
.write = do_sync_write,
.aio_read = generic_file_aio_read,
.aio_write = ext3_file_write,
- .readv = generic_file_readv,
- .writev = generic_file_writev,
.ioctl = ext3_ioctl,
.mmap = generic_file_mmap,
.open = generic_file_open,
-
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