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wendelin.core
Commit f723fb47 authored by Kirill Smelkov's avatar Kirill Smelkov
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parent 4ff147d1
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wcfs/__init__.py
View file @ f723fb47
...@@ -20,7 +20,12 @@ ...@@ -20,7 +20,12 @@
"""Module wcfs.py provides python gateway for spawning and interoperating with wcfs server """Module wcfs.py provides python gateway for spawning and interoperating with wcfs server
XXX doc Join(zurl) joins wcfs server. If wcfs server for zurl is not yet running, it
can be automatically started if `autostart=True` parameter is passed to join.
It will also be automatically started by default unless
$WENDELIN_CORE_WCFS_AUTOSTART=no is specified in environment.
XXX Conn.
""" """
import os, sys, hashlib, tempfile, subprocess, time import os, sys, hashlib, tempfile, subprocess, time
...@@ -49,19 +54,19 @@ class Conn(object): ...@@ -49,19 +54,19 @@ class Conn(object):
# serve starts and runs wcfs server for ZODB @ zurl. # serve starts and runs wcfs server for ZODB @ zurl.
# #
# it mounts wcfs at a location that is with 1-1 corresponence with zurl. # it mounts wcfs at a location that is with 1-1 correspondence with zurl.
# it then waits for wcfs to exit (either due to unmount or an error). # it then waits for wcfs to exit (either due to unmount or an error).
# #
# it is an error if wcfs was already started. # it is an error if wcfs was already started.
# #
# if exec_ is True, wcfs is not spawned, but execed to. # if exec_ is True, wcfs is not spawned, but executed into.
# #
# serve(zurl, exec_=False). # serve(zurl, exec_=False).
def serve(zurl, exec_=False): def serve(zurl, exec_=False):
mntpt = _mntpt_4zurl(zurl) mntpt = _mntpt_4zurl(zurl)
# try opening .wcfs - it is an error if we can do it. # try opening .wcfs - it is an error if we can do it.
# XXX -> option to wcfs itself # XXX -> option to wcfs itself?
try: try:
f = open(mntpt + "/.wcfs") f = open(mntpt + "/.wcfs")
except IOError as e: except IOError as e:
...@@ -80,14 +85,24 @@ def serve(zurl, exec_=False): ...@@ -80,14 +85,24 @@ def serve(zurl, exec_=False):
os.execv(argv[0], argv) os.execv(argv[0], argv)
# _default_autostart returns default autostart setting for join.
#
# Out-of-the-box we want wcfs to be automatically started, to ease developer
# experience when wendelin.core is standalone installed. However in environments
# like SlapOS, it is more preferable to start and monitor wcfs service explicitly.
# SlapOS & co. should thus set $WENDELIN_CORE_WCFS_AUTOSTART=no.
def _default_autostart():
autostart = os.environ.get("WENDELIN_CORE_WCFS_AUTOSTART", "yes")
autostart = autostart.lower()
return {"yes": True, "no": False}[autostart]
# join connects to wcfs server for ZODB @ zurl. # join connects to wcfs server for ZODB @ zurl.
# #
# if wcfs for that service was already started, join connects to it. # If wcfs for that service was already started, join connects to it.
# otherwise it starts wcfs for zurl if autostart is True or (None and system # Otherwise it starts wcfs for zurl if autostart is True.
# default for autostart is True). XXX
# #
# join(zurl) -> Conn. # join(zurl) -> Conn.
def join(zurl, autostart=None): def join(zurl, autostart=_default_autostart()):
mntpt = _mntpt_4zurl(zurl) mntpt = _mntpt_4zurl(zurl)
# try opening .wcfs - if we succeed - it is already mounted. # try opening .wcfs - if we succeed - it is already mounted.
...@@ -101,16 +116,18 @@ def join(zurl, autostart=None): ...@@ -101,16 +116,18 @@ def join(zurl, autostart=None):
# already have it # already have it
return Conn(mntpt, f) return Conn(mntpt, f)
# XXX autostart=None processing
if not autostart: if not autostart:
raise RuntimeError("wcfs: join %s: server not started" % zurl) raise RuntimeError("wcfs: join %s: server not started" % zurl)
return _start(zurl) # start wcfs with telling it to automatically exit when there is no client activity.
return _start(zurl, "-autoexit")
# _start starts wcfs server for ZODB @ zurl. # _start starts wcfs server for ZODB @ zurl.
# #
# _start(zurl) -> Conn # optv can be optionally given to pass flags to wcfs.
def _start(zurl): #
# _start(zurl, *optv) -> Conn
def _start(zurl, *optv):
mntpt = _mntpt_4zurl(zurl) mntpt = _mntpt_4zurl(zurl)
log.info("wcfs: starting for %s ...", zurl) log.info("wcfs: starting for %s ...", zurl)
...@@ -123,7 +140,8 @@ def _start(zurl): ...@@ -123,7 +140,8 @@ def _start(zurl):
def spawn(): def spawn():
err = None err = None
try: try:
p = subprocess.Popen([_wcfs_exe(), zurl, mntpt], close_fds=True) argv = [_wcfs_exe()] + list(optv) + [zurl, mntpt]
p = subprocess.Popen(argv, close_fds=True)
while 1: while 1:
ret = p.poll() ret = p.poll()
if ret is not None: if ret is not None:
...@@ -140,7 +158,7 @@ def _start(zurl): ...@@ -140,7 +158,7 @@ def _start(zurl):
break break
if _ == 1: if _ == 1:
# startup was ok - don't monitor spawned wcfs anylonger # startup was ok - don't monitor spawned wcfs any longer
break break
time.sleep(0.1) time.sleep(0.1)
...@@ -203,7 +221,13 @@ def _start(zurl): ...@@ -203,7 +221,13 @@ def _start(zurl):
if _ == 1: if _ == 1:
if isinstance(_rx, file): if isinstance(_rx, file):
# mounted ok - return Conn object # mounted ok - return Conn object.
#
# NOTE: we tell `spawn` thread to exit and stop monitoring spawned
# wcfs, because we want spawned wcfs to potentially overlive our
# process and to serve other processes. For the same reason we do
# not preserve cancel channel in returned Conn.
f = _rx f = _rx
startedok.close() startedok.close()
return Conn(mntpt, f) return Conn(mntpt, f)
...@@ -212,7 +236,6 @@ def _start(zurl): ...@@ -212,7 +236,6 @@ def _start(zurl):
err = _rx err = _rx
cancel.close() cancel.close()
raise RuntimeError("wcfs: start: %s" % err) # XXX errctx raise RuntimeError("wcfs: start: %s" % err) # XXX errctx
......
wcfs/todo.dot
View file @ f723fb47
...@@ -3,9 +3,11 @@ digraph { ...@@ -3,9 +3,11 @@ digraph {
wcfs -> ZODB_go_inv; wcfs -> ZODB_go_inv;
wcfs -> Sinvtree; wcfs -> Sinvtree;
wcfs -> δR; wcfs -> δR;
wcfs -> autoexit;
wcfs_simple -> Btree_read; wcfs_simple -> Btree_read;
wcfs_simple -> ZBlk_read; wcfs_simple -> ZBlk_read;
wcfs_simple -> autoexit;
client -> wcfs_spawn; client -> wcfs_spawn;
client -> δR; client -> δR;
...@@ -27,4 +29,6 @@ digraph { ...@@ -27,4 +29,6 @@ digraph {
test [label="? tests"] test [label="? tests"]
zodburl [label="zstor -> zurl", style=filled fillcolor=grey95] zodburl [label="zstor -> zurl", style=filled fillcolor=grey95]
autoexit [label="autoexit if\nautostart && !activity"]
} }
wcfs/todo.svg
View file @ f723fb47
...@@ -4,144 +4,163 @@ ...@@ -4,144 +4,163 @@
<!-- Generated by graphviz version 2.40.1 (20161225.0304) <!-- Generated by graphviz version 2.40.1 (20161225.0304)
--> -->
<!-- Title: %3 Pages: 1 --> <!-- Title: %3 Pages: 1 -->
<svg width="991pt" height="206pt" <svg width="1029pt" height="223pt"
viewBox="0.00 0.00 990.64 205.74" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> viewBox="0.00 0.00 1028.64 223.48" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 201.7401)"> <g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 219.4802)">
<title>%3</title> <title>%3</title>
<polygon fill="#ffffff" stroke="transparent" points="-4,4 -4,-201.7401 986.6407,-201.7401 986.6407,4 -4,4"/> <polygon fill="#ffffff" stroke="transparent" points="-4,4 -4,-219.4802 1024.6407,-219.4802 1024.6407,4 -4,4"/>
<!-- wcfs --> <!-- wcfs -->
<g id="node1" class="node"> <g id="node1" class="node">
<title>wcfs</title> <title>wcfs</title>
<ellipse fill="none" stroke="#000000" cx="342.0456" cy="-179.7401" rx="27.0966" ry="18"/> <ellipse fill="none" stroke="#000000" cx="414.0456" cy="-197.4802" rx="27.0966" ry="18"/>
<text text-anchor="middle" x="342.0456" y="-176.0401" font-family="Times,serif" font-size="14.00" fill="#000000">wcfs</text> <text text-anchor="middle" x="414.0456" y="-193.7802" font-family="Times,serif" font-size="14.00" fill="#000000">wcfs</text>
</g> </g>
<!-- wcfs_simple --> <!-- wcfs_simple -->
<g id="node2" class="node"> <g id="node2" class="node">
<title>wcfs_simple</title> <title>wcfs_simple</title>
<ellipse fill="none" stroke="#000000" cx="129.0456" cy="-98.8701" rx="60.623" ry="26.7407"/> <ellipse fill="none" stroke="#000000" cx="129.0456" cy="-116.6102" rx="60.623" ry="26.7407"/>
<text text-anchor="middle" x="129.0456" y="-102.6701" font-family="Times,serif" font-size="14.00" fill="#000000">wcfs no</text> <text text-anchor="middle" x="129.0456" y="-120.4102" font-family="Times,serif" font-size="14.00" fill="#000000">wcfs no</text>
<text text-anchor="middle" x="129.0456" y="-87.6701" font-family="Times,serif" font-size="14.00" fill="#000000">invalidations</text> <text text-anchor="middle" x="129.0456" y="-105.4102" font-family="Times,serif" font-size="14.00" fill="#000000">invalidations</text>
</g> </g>
<!-- wcfs&#45;&gt;wcfs_simple --> <!-- wcfs&#45;&gt;wcfs_simple -->
<g id="edge1" class="edge"> <g id="edge1" class="edge">
<title>wcfs&#45;&gt;wcfs_simple</title> <title>wcfs&#45;&gt;wcfs_simple</title>
<path fill="none" stroke="#000000" d="M318.2464,-170.7982C289.8538,-160.1201 240.9589,-141.6981 199.0456,-125.7401 194.301,-123.9337 189.3775,-122.0541 184.4396,-120.1654"/> <path fill="none" stroke="#000000" d="M387.9494,-191.992C347.2079,-183.1856 266.1965,-164.7164 199.0456,-143.4802 193.9258,-141.8611 188.6385,-140.0662 183.3706,-138.1941"/>
<polygon fill="#000000" stroke="#000000" points="185.5598,-116.8466 174.9694,-116.5393 183.0567,-123.3838 185.5598,-116.8466"/> <polygon fill="#000000" stroke="#000000" points="184.5436,-134.8964 173.9497,-134.7622 182.1477,-141.4736 184.5436,-134.8964"/>
</g> </g>
<!-- ZODB_go_inv --> <!-- ZODB_go_inv -->
<g id="node3" class="node"> <g id="node3" class="node">
<title>ZODB_go_inv</title> <title>ZODB_go_inv</title>
<ellipse fill="none" stroke="#000000" cx="269.0456" cy="-98.8701" rx="60.623" ry="26.7407"/> <ellipse fill="none" stroke="#000000" cx="269.0456" cy="-116.6102" rx="60.623" ry="26.7407"/>
<text text-anchor="middle" x="269.0456" y="-102.6701" font-family="Times,serif" font-size="14.00" fill="#000000">ZODB/go</text> <text text-anchor="middle" x="269.0456" y="-120.4102" font-family="Times,serif" font-size="14.00" fill="#000000">ZODB/go</text>
<text text-anchor="middle" x="269.0456" y="-87.6701" font-family="Times,serif" font-size="14.00" fill="#000000">invalidations</text> <text text-anchor="middle" x="269.0456" y="-105.4102" font-family="Times,serif" font-size="14.00" fill="#000000">invalidations</text>
</g> </g>
<!-- wcfs&#45;&gt;ZODB_go_inv --> <!-- wcfs&#45;&gt;ZODB_go_inv -->
<g id="edge2" class="edge"> <g id="edge2" class="edge">
<title>wcfs&#45;&gt;ZODB_go_inv</title> <title>wcfs&#45;&gt;ZODB_go_inv</title>
<path fill="none" stroke="#000000" d="M327.9704,-164.1476C319.622,-154.8991 308.7181,-142.8196 298.5632,-131.5699"/> <path fill="none" stroke="#000000" d="M392.9613,-185.721C372.8665,-174.5137 341.9144,-157.2509 315.9726,-142.7825"/>
<polygon fill="#000000" stroke="#000000" points="300.9919,-129.0371 291.6932,-123.9593 295.7958,-133.7276 300.9919,-129.0371"/> <polygon fill="#000000" stroke="#000000" points="317.47,-139.6101 307.0316,-137.7959 314.0603,-145.7236 317.47,-139.6101"/>
</g> </g>
<!-- Sinvtree --> <!-- Sinvtree -->
<g id="node4" class="node"> <g id="node4" class="node">
<title>Sinvtree</title> <title>Sinvtree</title>
<ellipse fill="none" stroke="#000000" cx="414.0456" cy="-98.8701" rx="66.0889" ry="18"/> <ellipse fill="none" stroke="#000000" cx="414.0456" cy="-116.6102" rx="66.0889" ry="18"/>
<text text-anchor="middle" x="414.0456" y="-95.1701" font-family="Times,serif" font-size="14.00" fill="#000000">server: inv. tree</text> <text text-anchor="middle" x="414.0456" y="-112.9102" font-family="Times,serif" font-size="14.00" fill="#000000">server: inv. tree</text>
</g> </g>
<!-- wcfs&#45;&gt;Sinvtree --> <!-- wcfs&#45;&gt;Sinvtree -->
<g id="edge3" class="edge"> <g id="edge3" class="edge">
<title>wcfs&#45;&gt;Sinvtree</title> <title>wcfs&#45;&gt;Sinvtree</title>
<path fill="none" stroke="#000000" d="M355.9279,-164.1476C366.0124,-152.8207 379.8773,-137.2477 391.5356,-124.1531"/> <path fill="none" stroke="#000000" d="M414.0456,-179.1296C414.0456,-169.1 414.0456,-156.4555 414.0456,-145.1666"/>
<polygon fill="#000000" stroke="#000000" points="394.4204,-126.1765 398.4559,-116.3803 389.1922,-121.5217 394.4204,-126.1765"/> <polygon fill="#000000" stroke="#000000" points="417.5457,-144.8882 414.0456,-134.8882 410.5457,-144.8883 417.5457,-144.8882"/>
</g> </g>
<!-- δR --> <!-- δR -->
<g id="node5" class="node"> <g id="node5" class="node">
<title>δR</title> <title>δR</title>
<ellipse fill="none" stroke="#000000" cx="554.0456" cy="-98.8701" rx="55.7903" ry="18"/> <ellipse fill="none" stroke="#000000" cx="592.0456" cy="-116.6102" rx="55.7903" ry="18"/>
<text text-anchor="middle" x="554.0456" y="-95.1701" font-family="Times,serif" font-size="14.00" fill="#000000">δR encoding</text> <text text-anchor="middle" x="592.0456" y="-112.9102" font-family="Times,serif" font-size="14.00" fill="#000000">δR encoding</text>
</g> </g>
<!-- wcfs&#45;&gt;δR --> <!-- wcfs&#45;&gt;δR -->
<g id="edge4" class="edge"> <g id="edge4" class="edge">
<title>wcfs&#45;&gt;δR</title> <title>wcfs&#45;&gt;δR</title>
<path fill="none" stroke="#000000" d="M366.3483,-171.1484C395.5899,-160.7334 446.1138,-142.4915 489.0456,-125.7401 496.006,-123.0242 503.3525,-120.0716 510.5028,-117.1505"/> <path fill="none" stroke="#000000" d="M436.5894,-187.238C465.1,-174.2848 514.7498,-151.7277 550.2709,-135.5895"/>
<polygon fill="#000000" stroke="#000000" points="512.1604,-120.2533 520.077,-113.212 509.4973,-113.7796 512.1604,-120.2533"/> <polygon fill="#000000" stroke="#000000" points="551.7733,-138.7513 559.43,-131.4283 548.8778,-132.3782 551.7733,-138.7513"/>
</g> </g>
<!-- Btree_read --> <!-- autoexit -->
<g id="node6" class="node"> <g id="node6" class="node">
<title>autoexit</title>
<ellipse fill="none" stroke="#000000" cx="460.0456" cy="-26.8701" rx="97.6615" ry="26.7407"/>
<text text-anchor="middle" x="460.0456" y="-30.6701" font-family="Times,serif" font-size="14.00" fill="#000000">autoexit if</text>
<text text-anchor="middle" x="460.0456" y="-15.6701" font-family="Times,serif" font-size="14.00" fill="#000000">autostart &amp;&amp; !activity</text>
</g>
<!-- wcfs&#45;&gt;autoexit -->
<g id="edge5" class="edge">
<title>wcfs&#45;&gt;autoexit</title>
<path fill="none" stroke="#000000" d="M437.4092,-187.8647C455.1593,-179.1615 478.2928,-164.4722 489.0456,-143.4802 502.0598,-118.0735 492.8759,-86.511 481.5061,-62.6324"/>
<polygon fill="#000000" stroke="#000000" points="484.5519,-60.8997 476.9096,-53.5617 478.3078,-64.0639 484.5519,-60.8997"/>
</g>
<!-- wcfs_simple&#45;&gt;autoexit -->
<g id="edge8" class="edge">
<title>wcfs_simple&#45;&gt;autoexit</title>
<path fill="none" stroke="#000000" d="M173.9291,-98.3925C182.215,-95.3125 190.8415,-92.2909 199.0456,-89.7401 255.7919,-72.0965 320.7548,-56.4326 371.6738,-45.153"/>
<polygon fill="#000000" stroke="#000000" points="372.6488,-48.5223 381.6637,-42.9562 371.1454,-41.6856 372.6488,-48.5223"/>
</g>
<!-- Btree_read -->
<g id="node7" class="node">
<title>Btree_read</title> <title>Btree_read</title>
<ellipse fill="none" stroke="#000000" cx="50.0456" cy="-18" rx="50.0912" ry="18"/> <ellipse fill="none" stroke="#000000" cx="50.0456" cy="-26.8701" rx="50.0912" ry="18"/>
<text text-anchor="middle" x="50.0456" y="-14.3" font-family="Times,serif" font-size="14.00" fill="#000000">BTree read</text> <text text-anchor="middle" x="50.0456" y="-23.1701" font-family="Times,serif" font-size="14.00" fill="#000000">BTree read</text>
</g> </g>
<!-- wcfs_simple&#45;&gt;Btree_read --> <!-- wcfs_simple&#45;&gt;Btree_read -->
<g id="edge5" class="edge"> <g id="edge6" class="edge">
<title>wcfs_simple&#45;&gt;Btree_read</title> <title>wcfs_simple&#45;&gt;Btree_read</title>
<path fill="none" stroke="#000000" d="M104.9137,-74.167C95.0785,-64.0989 83.7372,-52.4892 73.9278,-42.4475"/> <path fill="none" stroke="#000000" d="M106.6186,-91.1343C95.7668,-78.8071 82.7861,-64.0617 71.9975,-51.8064"/>
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</g> </g>
<!-- ZBlk_read --> <!-- ZBlk_read -->
<g id="node7" class="node"> <g id="node8" class="node">
<title>ZBlk_read</title> <title>ZBlk_read</title>
<ellipse fill="none" stroke="#000000" cx="208.0456" cy="-18" rx="89.8845" ry="18"/> <ellipse fill="none" stroke="#000000" cx="208.0456" cy="-26.8701" rx="89.8845" ry="18"/>
<text text-anchor="middle" x="208.0456" y="-14.3" font-family="Times,serif" font-size="14.00" fill="#000000">ZBigFile / ZBlk* read</text> <text text-anchor="middle" x="208.0456" y="-23.1701" font-family="Times,serif" font-size="14.00" fill="#000000">ZBigFile / ZBlk* read</text>
</g> </g>
<!-- wcfs_simple&#45;&gt;ZBlk_read --> <!-- wcfs_simple&#45;&gt;ZBlk_read -->
<g id="edge6" class="edge"> <g id="edge7" class="edge">
<title>wcfs_simple&#45;&gt;ZBlk_read</title> <title>wcfs_simple&#45;&gt;ZBlk_read</title>
<path fill="none" stroke="#000000" d="M153.1774,-74.167C162.7957,-64.321 173.8543,-53.0007 183.512,-43.1143"/> <path fill="none" stroke="#000000" d="M151.4725,-91.1343C162.1746,-78.9772 174.9473,-64.468 185.646,-52.3149"/>
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</g> </g>
<!-- client --> <!-- client -->
<g id="node8" class="node"> <g id="node9" class="node">
<title>client</title> <title>client</title>
<ellipse fill="none" stroke="#000000" cx="741.0456" cy="-179.7401" rx="30.5947" ry="18"/> <ellipse fill="none" stroke="#000000" cx="779.0456" cy="-197.4802" rx="30.5947" ry="18"/>
<text text-anchor="middle" x="741.0456" y="-176.0401" font-family="Times,serif" font-size="14.00" fill="#000000">client</text> <text text-anchor="middle" x="779.0456" y="-193.7802" font-family="Times,serif" font-size="14.00" fill="#000000">client</text>
</g> </g>
<!-- client&#45;&gt;δR --> <!-- client&#45;&gt;δR -->
<g id="edge8" class="edge"> <g id="edge10" class="edge">
<title>client&#45;&gt;δR</title> <title>client&#45;&gt;δR</title>
<path fill="none" stroke="#000000" d="M716.2134,-169.0012C685.8435,-155.8674 633.9321,-133.4178 597.0269,-117.4578"/> <path fill="none" stroke="#000000" d="M754.2134,-186.7413C723.8435,-173.6075 671.9321,-151.1579 635.0269,-135.1979"/>
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</g> </g>
<!-- wcfs_spawn --> <!-- wcfs_spawn -->
<g id="node9" class="node"> <g id="node10" class="node">
<title>wcfs_spawn</title> <title>wcfs_spawn</title>
<ellipse fill="#ffffe0" stroke="#000000" cx="680.0456" cy="-98.8701" rx="51.9908" ry="18"/> <ellipse fill="#ffffe0" stroke="#000000" cx="718.0456" cy="-116.6102" rx="51.9908" ry="18"/>
<text text-anchor="middle" x="680.0456" y="-95.1701" font-family="Times,serif" font-size="14.00" fill="#000000">spawn wcfs</text> <text text-anchor="middle" x="718.0456" y="-112.9102" font-family="Times,serif" font-size="14.00" fill="#000000">spawn wcfs</text>
</g> </g>
<!-- client&#45;&gt;wcfs_spawn --> <!-- client&#45;&gt;wcfs_spawn -->
<g id="edge7" class="edge"> <g id="edge9" class="edge">
<title>client&#45;&gt;wcfs_spawn</title> <title>client&#45;&gt;wcfs_spawn</title>
<path fill="none" stroke="#000000" d="M728.4063,-162.9838C720.0703,-151.9324 708.9859,-137.2374 699.5322,-124.7042"/> <path fill="none" stroke="#000000" d="M766.4063,-180.7239C758.0703,-169.6725 746.9859,-154.9775 737.5322,-142.4443"/>
<polygon fill="#000000" stroke="#000000" points="702.1178,-122.32 693.3016,-116.4441 696.5294,-126.5353 702.1178,-122.32"/> <polygon fill="#000000" stroke="#000000" points="740.1178,-140.0601 731.3016,-134.1842 734.5294,-144.2755 740.1178,-140.0601"/>
</g> </g>
<!-- nowcfs --> <!-- nowcfs -->
<g id="node10" class="node"> <g id="node11" class="node">
<title>nowcfs</title> <title>nowcfs</title>
<ellipse fill="none" stroke="#000000" cx="803.0456" cy="-98.8701" rx="52.7911" ry="18"/> <ellipse fill="none" stroke="#000000" cx="841.0456" cy="-116.6102" rx="52.7911" ry="18"/>
<text text-anchor="middle" x="803.0456" y="-95.1701" font-family="Times,serif" font-size="14.00" fill="#000000">!wcfs mode</text> <text text-anchor="middle" x="841.0456" y="-112.9102" font-family="Times,serif" font-size="14.00" fill="#000000">!wcfs mode</text>
</g> </g>
<!-- client&#45;&gt;nowcfs --> <!-- client&#45;&gt;nowcfs -->
<g id="edge9" class="edge"> <g id="edge11" class="edge">
<title>client&#45;&gt;nowcfs</title> <title>client&#45;&gt;nowcfs</title>
<path fill="none" stroke="#000000" d="M753.892,-162.9838C762.3647,-151.9324 773.6308,-137.2374 783.2395,-124.7042"/> <path fill="none" stroke="#000000" d="M791.892,-180.7239C800.3647,-169.6725 811.6308,-154.9775 821.2395,-142.4443"/>
<polygon fill="#000000" stroke="#000000" points="786.2655,-126.5098 789.5722,-116.4441 780.7102,-122.2507 786.2655,-126.5098"/> <polygon fill="#000000" stroke="#000000" points="824.2655,-144.2499 827.5722,-134.1842 818.7102,-139.9908 824.2655,-144.2499"/>
</g> </g>
<!-- zodburl --> <!-- zodburl -->
<g id="node11" class="node"> <g id="node12" class="node">
<title>zodburl</title> <title>zodburl</title>
<ellipse fill="#f2f2f2" stroke="#000000" cx="928.0456" cy="-98.8701" rx="54.6905" ry="18"/> <ellipse fill="#f2f2f2" stroke="#000000" cx="966.0456" cy="-116.6102" rx="54.6905" ry="18"/>
<text text-anchor="middle" x="928.0456" y="-95.1701" font-family="Times,serif" font-size="14.00" fill="#000000">zstor &#45;&gt; zurl</text> <text text-anchor="middle" x="966.0456" y="-112.9102" font-family="Times,serif" font-size="14.00" fill="#000000">zstor &#45;&gt; zurl</text>
</g> </g>
<!-- client&#45;&gt;zodburl --> <!-- client&#45;&gt;zodburl -->
<g id="edge10" class="edge"> <g id="edge12" class="edge">
<title>client&#45;&gt;zodburl</title> <title>client&#45;&gt;zodburl</title>
<path fill="none" stroke="#000000" d="M765.5519,-168.6251C770.6641,-166.3309 776.0247,-163.9432 781.0456,-161.7401 791.164,-157.3002 845.5685,-134.0595 885.2517,-117.1243"/> <path fill="none" stroke="#000000" d="M803.5519,-186.3652C808.6641,-184.0711 814.0247,-181.6834 819.0456,-179.4802 829.164,-175.0403 883.5685,-151.7996 923.2517,-134.8644"/>
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</g> </g>
<!-- test --> <!-- test -->
<g id="node12" class="node"> <g id="node13" class="node">
<title>test</title> <title>test</title>
<ellipse fill="none" stroke="#000000" cx="822.0456" cy="-179.7401" rx="32.4942" ry="18"/> <ellipse fill="none" stroke="#000000" cx="860.0456" cy="-197.4802" rx="32.4942" ry="18"/>
<text text-anchor="middle" x="822.0456" y="-176.0401" font-family="Times,serif" font-size="14.00" fill="#000000">? tests</text> <text text-anchor="middle" x="860.0456" y="-193.7802" font-family="Times,serif" font-size="14.00" fill="#000000">? tests</text>
</g> </g>
</g> </g>
</svg> </svg>
wcfs/wcfs.go
View file @ f723fb47
...@@ -119,7 +119,7 @@ ...@@ -119,7 +119,7 @@
// mmap(bigfile/<bigfileX>/head/data) // mmap(bigfile/<bigfileX>/head/data)
// mmap(bigfile/<bigfileX>/@<Cat>/data, δR(Cat,Sat), MAP_FIXED) # mmaped at addresses corresponding to δR(Cat,Sat) // mmap(bigfile/<bigfileX>/@<Cat>/data, δR(Cat,Sat), MAP_FIXED) # mmaped at addresses corresponding to δR(Cat,Sat)
// //
// When client completes its initiall mmapping it sends ack back to the server: // When client completes its initial mmapping it sends ack back to the server:
// //
// C: ack // C: ack
// //
...@@ -170,7 +170,7 @@ ...@@ -170,7 +170,7 @@
// This way there should be no possibility for a client to block wcfs // This way there should be no possibility for a client to block wcfs
// indefinitely waiting for client's ack. // indefinitely waiting for client's ack.
// //
// Similarly for initiall mmapings client could first mmap head/data, then open // Similarly for initial mmapings client could first mmap head/data, then open
// head/invalidations and tell the server that it wants Cat revision, with // head/invalidations and tell the server that it wants Cat revision, with
// the server then remmaping blocks to get to Cat state via ptrace. // the server then remmaping blocks to get to Cat state via ptrace.
// //
...@@ -357,6 +357,8 @@ func (br *BigFileRoot) Mkdir(name string, mode uint32, _ *fuse.Context) (*nodefs ...@@ -357,6 +357,8 @@ func (br *BigFileRoot) Mkdir(name string, mode uint32, _ *fuse.Context) (*nodefs
mkdir(br, name, bx) // XXX takes treeLock - ok under br.mu ? mkdir(br, name, bx) // XXX takes treeLock - ok under br.mu ?
mkdir(bx, "head", bf) mkdir(bx, "head", bf)
mkfile(bf, "data", bf.data) mkfile(bf, "data", bf.data)
// XXX mkfile(bf, "at", bf.at)
// XXX mkfile(bf, "invalidations", bf.inv)
return bx.Inode(), fuse.OK return bx.Inode(), fuse.OK
} }
...@@ -367,16 +369,15 @@ func (br *BigFileRoot) Mkdir(name string, mode uint32, _ *fuse.Context) (*nodefs ...@@ -367,16 +369,15 @@ func (br *BigFileRoot) Mkdir(name string, mode uint32, _ *fuse.Context) (*nodefs
// XXX option to prevent starting if wcfs was already started ? // XXX option to prevent starting if wcfs was already started ?
// XXX option to automatically exit/unmount if there are no requests for some t
// (UC: autospawned from join)
func main() { func main() {
log.SetPrefix("wcfs: ") log.SetPrefix("wcfs: ")
debug := flag.Bool("d", false, "debug") debug := flag.Bool("d", false, "debug")
autoexit := flag.Bool("autoexit", false, "automatically stop service when there is no client activity")
flag.Parse() flag.Parse()
if len(flag.Args()) != 2 { if len(flag.Args()) != 2 {
log.Fatalf("Usage: %s zurl mntpt", os.Args[0]) log.Fatalf("Usage: %s [OPTIONS] zurl mntpt", os.Args[0])
} }
zurl := flag.Args()[0] zurl := flag.Args()[0]
mntpt := flag.Args()[1] mntpt := flag.Args()[1]
...@@ -405,6 +406,9 @@ func main() { ...@@ -405,6 +406,9 @@ func main() {
mkfile(root, ".wcfs", NewStaticFile([]byte(zurl))) mkfile(root, ".wcfs", NewStaticFile([]byte(zurl)))
mkdir(root, "bigfile", NewBigFileRoot(zstor)) mkdir(root, "bigfile", NewBigFileRoot(zstor))
// TODO handle autoexit
_ = autoexit
// serve client requests // serve client requests
server.Serve() // XXX Serve returns no eror server.Serve() // XXX Serve returns no error
} }
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