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OpenCloudOS-Kernel
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fuse: switch to ->write_iter() 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2014-04-03 14:33:23 -04:00
parent b30ac0fc41
commit 84c3d55cc4
1 changed files with 11 additions and 16 deletions
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27
fs/fuse/file.c
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@ -1182,18 +1182,17 @@ static ssize_t fuse_perform_write(struct file *file,
return res > 0 ? res : err;
}
static ssize_t fuse_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t pos)
static ssize_t fuse_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
size_t count;
size_t count = iov_iter_count(from);
ssize_t written = 0;
ssize_t written_buffered = 0;
struct inode *inode = mapping->host;
ssize_t err;
struct iov_iter i;
loff_t endbyte = 0;
loff_t pos = iocb->ki_pos;
if (get_fuse_conn(inode)->writeback_cache) {
/* Update size (EOF optimization) and mode (SUID clearing) */
@ -1201,13 +1200,9 @@ static ssize_t fuse_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
if (err)
return err;
return generic_file_aio_write(iocb, iov, nr_segs, pos);
return generic_file_write_iter(iocb, from);
}
WARN_ON(iocb->ki_pos != pos);
count = iov_length(iov, nr_segs);
iov_iter_init(&i, WRITE, iov, nr_segs, count);
mutex_lock(&inode->i_mutex);
/* We can write back this queue in page reclaim */
@ -1220,7 +1215,7 @@ static ssize_t fuse_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
if (count == 0)
goto out;
iov_iter_truncate(&i, count);
iov_iter_truncate(from, count);
err = file_remove_suid(file);
if (err)
goto out;
@ -1230,13 +1225,13 @@ static ssize_t fuse_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
goto out;
if (file->f_flags & O_DIRECT) {
written = generic_file_direct_write(iocb, &i, pos);
if (written < 0 || !iov_iter_count(&i))
written = generic_file_direct_write(iocb, from, pos);
if (written < 0 || !iov_iter_count(from))
goto out;
pos += written;
written_buffered = fuse_perform_write(file, mapping, &i, pos);
written_buffered = fuse_perform_write(file, mapping, from, pos);
if (written_buffered < 0) {
err = written_buffered;
goto out;
@ -1255,7 +1250,7 @@ static ssize_t fuse_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
written += written_buffered;
iocb->ki_pos = pos + written_buffered;
} else {
written = fuse_perform_write(file, mapping, &i, pos);
written = fuse_perform_write(file, mapping, from, pos);
if (written >= 0)
iocb->ki_pos = pos + written;
}
@ -3039,8 +3034,8 @@ static const struct file_operations fuse_file_operations = {
.llseek = fuse_file_llseek,
.read = new_sync_read,
.read_iter = fuse_file_read_iter,
.write = do_sync_write,
.aio_write = fuse_file_aio_write,
.write = new_sync_write,
.write_iter = fuse_file_write_iter,
.mmap = fuse_file_mmap,
.open = fuse_open,
.flush = fuse_flush,