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%-------------------------------------------------------------------------------
% file_fmt_subsystem_integration.tex - subsystem integration as image
%-------------------------------------------------------------------------------
% author : Manuel Bentele
% date : Aug 29, 2019
% copyright: (c) 2019 Manuel Bentele
%-------------------------------------------------------------------------------
\begin{tikzpicture}[
box/.style = {rectangle, draw, minimum height = 0.15\textheight},
bwidth/.style = {minimum width = 0.35\textwidth},
old/.style = {dashed, fill = gray!10},
arrow/.style = {-triangle 45},
desc/.style = {font = \small}
]
\node[box, old, minimum height = 0.08\textheight, bwidth] (blk) {Block layer};
\node[box, old, below = 0.6 of blk, bwidth] (loop) {Loop device module};
\node[box, old, minimum height = 0.1\textheight,
xshift = -0.1\textheight, yshift = -0.01\textheight] (lodevs)
at (loop.south east) {Loop devices};
\node[box, fill = hdr, right = 2 of loop] (subsys) {File format subsystem};
\node[box, fill = dat, minimum height = 0.1\textheight,
xshift = -0.1\textheight, yshift = -0.01\textheight] (drvs)
at (subsys.south east) {File format drivers};
\node[box, right = 2 of subsys, old] (file) {Backing files};
\draw[arrow] (blk) -- node[right, desc] {Requests} (loop);
\draw[arrow] (loop) -- node[above, desc] {Requests} (subsys);
\draw[arrow] (subsys) --
node[anchor = west, rotate = 90, align = left, desc]
{read\\write\\\ \ \vdots} (file);
\end{tikzpicture}
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