kernel/fs/vfs.cpp

357 static status_t file_read(struct file_descriptor* descriptor, off_t pos,
359 static status_t file_write(struct file_descriptor* descriptor, off_t pos,
361 static off_t file_seek(struct file_descriptor* descriptor, off_t pos,
383 static status_t attr_read(struct file_descriptor* descriptor, off_t pos,
385 static status_t attr_write(struct file_descriptor* descriptor, off_t pos,
387 static off_t attr_seek(struct file_descriptor* descriptor, off_t pos,
600 	PagesIOTraceEntry(struct vnode* vnode, void* cookie, off_t pos,
609 		fPos(pos),
623 			"cookie: %p, pos: %" B_PRIdOFF ", size: %" B_PRIu64 ", vecs: {",
658 	ReadPages(struct vnode* vnode, void* cookie, off_t pos,
663 		PagesIOTraceEntry(vnode, cookie, pos, vecs, count, flags,
678 	WritePages(struct vnode* vnode, void* cookie, off_t pos,
683 		PagesIOTraceEntry(vnode, cookie, pos, vecs, count, flags,
1821 			flock->l_start += descriptor->pos;
2849 				ASSERT(descriptor->pos == -1);
2855 				descriptor->pos = 0;
3379 		kprintf("   no.  type    %*s  ref  open  mode         pos    %*s\n",
3391 			fd->pos, fd->cookie,
4012 read_pages(int fd, off_t pos, const iovec* vecs, size_t count,
4022 	status_t status = vfs_read_pages(vnode, descriptor->cookie, pos, vecs,
4031 write_pages(int fd, off_t pos, const iovec* vecs, size_t count,
4041 	status_t status = vfs_write_pages(vnode, descriptor->cookie, pos, vecs,
4637 vfs_read_pages(struct vnode* vnode, void* cookie, off_t pos,
4641 	FUNCTION(("vfs_read_pages: vnode %p, vecs %p, pos %" B_PRIdOFF "\n", vnode,
4642 		vecs, pos));
4649 	status_t status = request.Init(pos, vecs, count, *_numBytes, false, flags);
4657 	TPIO(ReadPages(vnode, cookie, pos, vecs, count, flags, bytesRequested,
4665 vfs_write_pages(struct vnode* vnode, void* cookie, off_t pos,
4669 	FUNCTION(("vfs_write_pages: vnode %p, vecs %p, pos %" B_PRIdOFF "\n", vnode,
4670 		vecs, pos));
4677 	status_t status = request.Init(pos, vecs, count, *_numBytes, true, flags);
4685 	TPIO(WritePages(vnode, cookie, pos, vecs, count, flags, bytesRequested,
5696 file_read(struct file_descriptor* descriptor, off_t pos, void* buffer,
5700 	FUNCTION(("file_read: buf %p, pos %" B_PRIdOFF ", len %p = %ld\n", buffer,
5701 		pos, length, *length));
5705 	if (pos != -1 && descriptor->pos == -1)
5708 	return FS_CALL(vnode, read, descriptor->cookie, pos, buffer, length);
5713 file_write(struct file_descriptor* descriptor, off_t pos, const void* buffer,
5717 	FUNCTION(("file_write: buf %p, pos %" B_PRIdOFF ", len %p\n", buffer, pos,
5722 	if (pos != -1 && descriptor->pos == -1)
5728 	return FS_CALL(vnode, write, descriptor->cookie, pos, buffer, length);
5733 file_seek(struct file_descriptor* descriptor, off_t pos, int seekType)
5739 	FUNCTION(("file_seek(pos = %" B_PRIdOFF ", seekType = %d)\n", pos,
5742 	if (descriptor->pos == -1)
5758 			offset = descriptor->pos;
5795 				offset = pos;
5800 					if (offset > pos)
5801 						offset -= pos;
5818 			if (pos >= end)
5820 			offset = seekType == SEEK_HOLE ? end - pos : 0;
5828 	if (offset > 0 && LONGLONG_MAX - offset < pos)
5831 	pos += offset;
5832 	if (pos < 0)
5835 	return descriptor->pos = pos;
6864 attr_read(struct file_descriptor* descriptor, off_t pos, void* buffer,
6869 	FUNCTION(("attr_read: buf %p, pos %" B_PRIdOFF ", len %p = %ld\n", buffer,
6870 		pos, length, *length));
6875 	return FS_CALL(vnode, read_attr, descriptor->cookie, pos, buffer, length);
6880 attr_write(struct file_descriptor* descriptor, off_t pos, const void* buffer,
6885 	FUNCTION(("attr_write: buf %p, pos %" B_PRIdOFF ", len %p\n", buffer, pos,
6891 	return FS_CALL(vnode, write_attr, descriptor->cookie, pos, buffer, length);
6896 attr_seek(struct file_descriptor* descriptor, off_t pos, int seekType)
6905 			offset = descriptor->pos;
6927 	if (offset > 0 && LONGLONG_MAX - offset < pos)
6930 	pos += offset;
6931 	if (pos < 0)
6934 	return descriptor->pos = pos;
8052 fs_read_attr(int fd, const char *attribute, uint32 type, off_t pos,
8059 	ssize_t bytesRead = _kern_read(attrFD, pos, buffer, readBytes);
9718 _user_read_attr(int fd, const char* userAttribute, off_t pos, void* userBuffer,
9735 	ssize_t bytes = _user_read(attr, pos, userBuffer, readBytes);
9743 _user_write_attr(int fd, const char* userAttribute, uint32 type, off_t pos,
9759 		O_CREAT | O_WRONLY | (pos != 0 ? 0 : O_TRUNC), false);
9763 	ssize_t bytes = _user_write(attr, pos, buffer, writeBytes);