diff options
Diffstat (limited to 'presentation/images/linux_storage_stack.tex')
| -rw-r--r-- | presentation/images/linux_storage_stack.tex | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/presentation/images/linux_storage_stack.tex b/presentation/images/linux_storage_stack.tex new file mode 100644 index 0000000..3fb9eb2 --- /dev/null +++ b/presentation/images/linux_storage_stack.tex @@ -0,0 +1,64 @@ +%------------------------------------------------------------------------------- +% linux_storage_stack.tex - renders the storage stack of the Linux kernel +%------------------------------------------------------------------------------- +% author : Manuel Bentele +% date : Aug 29, 2019 +% copyright: (c) 2019 Manuel Bentele +%------------------------------------------------------------------------------- + +\begin{tikzpicture}[ + box/.style = {rectangle, draw, minimum height = 0.75cm, align = center}, + largeb/.style = {minimum width = 0.7\textwidth}, + smallb/.style = {minimum width = 0.225\textwidth}, + arrow/.style = {-triangle 45}, + desc/.style = {font = \footnotesize}, + node distance = 0.06\textwidth + ] + + \node[box, largeb, fill = hdr] (apps) {Applications}; + \node[box, largeb, fill = ret, below = of apps] (vfs) + {Virtual file system (VFS)}; + \node[box, smallb, fill = gray!15, left = of vfs] (dio) {Direct IO}; + \node[box, smallb, fill = gray!15, right = of vfs] (pgc) {Page cache}; + + \draw[arrow] ([xshift=-0.3\textwidth]apps.south) -- node[right,desc] {read} + ([xshift=-0.3\textwidth]vfs.north); + \draw[arrow] ([xshift=-0.1\textwidth]apps.south) -- node[right,desc] {write} + ([xshift=-0.1\textwidth]vfs.north); + \draw[arrow] ([xshift=0.1\textwidth]apps.south) -- node[right,desc] {open} + ([xshift=0.1\textwidth]vfs.north); + \draw[arrow] ([xshift=0.3\textwidth]apps.south) -- node[right,desc] {\dots} + ([xshift=0.3\textwidth]vfs.north); + + \draw[line width = 2pt] (vfs) -- (dio); + \draw[line width = 2pt] (vfs) -- (pgc); + \draw[arrow] (apps) -| node[above, align = center, desc] + {mmap\\malloc} (pgc); + + \node[box, largeb, below = of vfs, fill = dat] (dmp) + {Device mapper (optional)}; + \node[box, largeb, below = of dmp, fill = l2t] (blk) + {Block layer\\\scriptsize (maps BIOs to requests)}; + + \draw[arrow] (pgc) |- node[desc, below] {BIOs (block IOs)} (dmp); + \draw[arrow] (dio) |- node[desc, below] {BIOs (block IOs)} (dmp); + \draw[arrow] (dmp) -- node[desc, left] {BIOs} (blk); + \draw[arrow] ([xshift=-0.05\textwidth]dmp.north) -- + node[desc, left, pos = 1.0] {stackable} ++(0, 0.03\textwidth) -- + ++(0.1\textwidth, 0) -- ++(0, -0.03\textwidth); + + \node[box, largeb, fill = reb, below = of blk] (drvrq) + {Block drivers\\\scriptsize (request based)}; + \node[box, smallb, fill = reb, right = of drvrq] (drvbio) + {Block drivers\\\scriptsize (BIO based)}; + + \draw[arrow] (blk) -- node[desc, right] {Requests} (drvrq); + \draw[arrow] (dmp.south)++(0, -0.03\textwidth) -| + node[desc, right, pos=0.725] {BIOs} (drvbio); + + \node[box, fill = gray!15, below = of drvrq.south west, anchor = north west, + minimum width = 0.9865\textwidth] (hw) {Physical or virtual devices}; + + \draw[arrow] (drvrq) -- (drvrq |- hw.north); + \draw[arrow] (drvbio) -- (drvbio |- hw.north); +\end{tikzpicture}
\ No newline at end of file |