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orangefs: move do_readv_writev to direct_IO
direct_IO was the only caller and all direct_IO did was call it, so there's no use in having the code spread out into so many functions. Signed-off-by: Martin Brandenburg <martin@omnibond.com> Signed-off-by: Mike Marshall <hubcap@omnibond.com>
This commit is contained in:
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43f3457604
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3e9dfc6e1e
@ -237,114 +237,6 @@ out:
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return ret;
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}
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/*
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* Common entry point for read/write/readv/writev
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* This function will dispatch it to either the direct I/O
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* or buffered I/O path depending on the mount options and/or
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* augmented/extended metadata attached to the file.
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* Note: File extended attributes override any mount options.
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*/
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ssize_t do_readv_writev(enum ORANGEFS_io_type type, struct file *file,
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loff_t *offset, struct iov_iter *iter)
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{
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struct inode *inode = file->f_mapping->host;
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struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
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struct orangefs_khandle *handle = &orangefs_inode->refn.khandle;
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size_t count = iov_iter_count(iter);
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ssize_t total_count = 0;
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ssize_t ret = -EINVAL;
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gossip_debug(GOSSIP_FILE_DEBUG,
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"%s-BEGIN(%pU): count(%d) after estimate_max_iovecs.\n",
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__func__,
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handle,
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(int)count);
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if (type == ORANGEFS_IO_WRITE) {
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gossip_debug(GOSSIP_FILE_DEBUG,
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"%s(%pU): proceeding with offset : %llu, "
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"size %d\n",
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__func__,
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handle,
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llu(*offset),
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(int)count);
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}
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if (count == 0) {
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ret = 0;
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goto out;
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}
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while (iov_iter_count(iter)) {
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size_t each_count = iov_iter_count(iter);
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size_t amt_complete;
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/* how much to transfer in this loop iteration */
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if (each_count > orangefs_bufmap_size_query())
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each_count = orangefs_bufmap_size_query();
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gossip_debug(GOSSIP_FILE_DEBUG,
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"%s(%pU): size of each_count(%d)\n",
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__func__,
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handle,
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(int)each_count);
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gossip_debug(GOSSIP_FILE_DEBUG,
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"%s(%pU): BEFORE wait_for_io: offset is %d\n",
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__func__,
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handle,
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(int)*offset);
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ret = wait_for_direct_io(type, inode, offset, iter,
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each_count, 0);
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gossip_debug(GOSSIP_FILE_DEBUG,
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"%s(%pU): return from wait_for_io:%d\n",
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__func__,
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handle,
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(int)ret);
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if (ret < 0)
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goto out;
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*offset += ret;
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total_count += ret;
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amt_complete = ret;
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gossip_debug(GOSSIP_FILE_DEBUG,
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"%s(%pU): AFTER wait_for_io: offset is %d\n",
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__func__,
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handle,
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(int)*offset);
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/*
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* if we got a short I/O operations,
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* fall out and return what we got so far
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*/
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if (amt_complete < each_count)
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break;
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} /*end while */
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out:
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if (total_count > 0)
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ret = total_count;
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if (ret > 0) {
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if (type == ORANGEFS_IO_READ) {
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file_accessed(file);
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} else {
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file_update_time(file);
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if (*offset > i_size_read(inode))
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i_size_write(inode, *offset);
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}
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}
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gossip_debug(GOSSIP_FILE_DEBUG,
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"%s(%pU): Value(%d) returned.\n",
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__func__,
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handle,
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(int)ret);
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return ret;
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}
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static ssize_t orangefs_file_read_iter(struct kiocb *iocb,
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struct iov_iter *iter)
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{
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@ -128,10 +128,118 @@ static int orangefs_releasepage(struct page *page, gfp_t foo)
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static ssize_t orangefs_direct_IO(struct kiocb *iocb,
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struct iov_iter *iter)
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{
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/*
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* Comment from original do_readv_writev:
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* Common entry point for read/write/readv/writev
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* This function will dispatch it to either the direct I/O
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* or buffered I/O path depending on the mount options and/or
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* augmented/extended metadata attached to the file.
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* Note: File extended attributes override any mount options.
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*/
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struct file *file = iocb->ki_filp;
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loff_t pos = *(&iocb->ki_pos);
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return do_readv_writev(iov_iter_rw(iter) == WRITE ?
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ORANGEFS_IO_WRITE : ORANGEFS_IO_READ, file, &pos, iter);
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loff_t pos = iocb->ki_pos;
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enum ORANGEFS_io_type type = iov_iter_rw(iter) == WRITE ?
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ORANGEFS_IO_WRITE : ORANGEFS_IO_READ;
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loff_t *offset = &pos;
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struct inode *inode = file->f_mapping->host;
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struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
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struct orangefs_khandle *handle = &orangefs_inode->refn.khandle;
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size_t count = iov_iter_count(iter);
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size_t ORIGINALcount = iov_iter_count(iter);
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ssize_t total_count = 0;
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ssize_t ret = -EINVAL;
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int i = 0;
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gossip_debug(GOSSIP_FILE_DEBUG,
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"%s-BEGIN(%pU): count(%d) after estimate_max_iovecs.\n",
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__func__,
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handle,
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(int)count);
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if (type == ORANGEFS_IO_WRITE) {
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gossip_debug(GOSSIP_FILE_DEBUG,
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"%s(%pU): proceeding with offset : %llu, "
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"size %d\n",
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__func__,
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handle,
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llu(*offset),
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(int)count);
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}
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if (count == 0) {
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ret = 0;
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goto out;
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}
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while (iov_iter_count(iter)) {
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size_t each_count = iov_iter_count(iter);
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size_t amt_complete;
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i++;
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/* how much to transfer in this loop iteration */
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if (each_count > orangefs_bufmap_size_query())
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each_count = orangefs_bufmap_size_query();
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gossip_debug(GOSSIP_FILE_DEBUG,
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"%s(%pU): size of each_count(%d)\n",
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__func__,
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handle,
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(int)each_count);
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gossip_debug(GOSSIP_FILE_DEBUG,
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"%s(%pU): BEFORE wait_for_io: offset is %d\n",
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__func__,
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handle,
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(int)*offset);
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ret = wait_for_direct_io(type, inode, offset, iter,
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each_count, 0);
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gossip_debug(GOSSIP_FILE_DEBUG,
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"%s(%pU): return from wait_for_io:%d\n",
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__func__,
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handle,
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(int)ret);
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if (ret < 0)
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goto out;
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*offset += ret;
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total_count += ret;
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amt_complete = ret;
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gossip_debug(GOSSIP_FILE_DEBUG,
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"%s(%pU): AFTER wait_for_io: offset is %d\n",
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__func__,
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handle,
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(int)*offset);
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/*
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* if we got a short I/O operations,
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* fall out and return what we got so far
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*/
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if (amt_complete < each_count)
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break;
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} /*end while */
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out:
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if (total_count > 0)
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ret = total_count;
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if (ret > 0) {
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if (type == ORANGEFS_IO_READ) {
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file_accessed(file);
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} else {
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file_update_time(file);
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if (*offset > i_size_read(inode))
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i_size_write(inode, *offset);
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}
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}
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gossip_debug(GOSSIP_FILE_DEBUG,
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"%s(%pU): Value(%d) returned.\n",
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__func__,
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handle,
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(int)ret);
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return ret;
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}
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/** ORANGEFS2 implementation of address space operations */
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