1 |
To no great surprise, the existing locking was broken. For example, |
2 |
clear_chroot() releases the lock. It is called by unpack(), which is |
3 |
part of prepare_sequence. The result is that the whole build could be |
4 |
done without holding the lock. |
5 |
|
6 |
Just lock around run(). It's not apparent that finer-grained locking |
7 |
does anything for us. |
8 |
|
9 |
Signed-off-by: Matt Turner <mattst88@g.o> |
10 |
--- |
11 |
catalyst/base/clearbase.py | 2 -- |
12 |
catalyst/base/stagebase.py | 10 +++---- |
13 |
catalyst/lock.py | 58 ------------------------------------ |
14 |
catalyst/targets/snapshot.py | 6 ++-- |
15 |
4 files changed, 7 insertions(+), 69 deletions(-) |
16 |
delete mode 100644 catalyst/lock.py |
17 |
|
18 |
diff --git a/catalyst/base/clearbase.py b/catalyst/base/clearbase.py |
19 |
index dcf6c523..6218330e 100644 |
20 |
--- a/catalyst/base/clearbase.py |
21 |
+++ b/catalyst/base/clearbase.py |
22 |
@@ -27,12 +27,10 @@ class ClearBase(): |
23 |
self.resume.clear_all(remove=True) |
24 |
|
25 |
def clear_chroot(self): |
26 |
- self.chroot_lock.unlock() |
27 |
log.notice('Clearing the chroot path ...') |
28 |
clear_dir(self.settings["chroot_path"], mode=0o755) |
29 |
|
30 |
def remove_chroot(self): |
31 |
- self.chroot_lock.unlock() |
32 |
log.notice('Removing the chroot path ...') |
33 |
clear_dir(self.settings["chroot_path"], mode=0o755, remove=True) |
34 |
|
35 |
diff --git a/catalyst/base/stagebase.py b/catalyst/base/stagebase.py |
36 |
index 448d6265..10cffd4c 100644 |
37 |
--- a/catalyst/base/stagebase.py |
38 |
+++ b/catalyst/base/stagebase.py |
39 |
@@ -8,6 +8,7 @@ import sys |
40 |
|
41 |
from pathlib import Path |
42 |
|
43 |
+import fasteners |
44 |
import libmount |
45 |
import toml |
46 |
|
47 |
@@ -25,7 +26,6 @@ from catalyst.support import (CatalystError, file_locate, normpath, |
48 |
from catalyst.base.targetbase import TargetBase |
49 |
from catalyst.base.clearbase import ClearBase |
50 |
from catalyst.base.genbase import GenBase |
51 |
-from catalyst.lock import LockDir, LockInUse |
52 |
from catalyst.fileops import ensure_dirs, clear_dir, clear_path |
53 |
from catalyst.base.resume import AutoResume |
54 |
|
55 |
@@ -36,9 +36,6 @@ def run_sequence(sequence): |
56 |
sys.stdout.flush() |
57 |
try: |
58 |
func() |
59 |
- except LockInUse: |
60 |
- log.error('Unable to aquire the lock...') |
61 |
- return False |
62 |
except Exception: |
63 |
log.error('Exception running action sequence %s', |
64 |
func.__name__, exc_info=True) |
65 |
@@ -478,7 +475,6 @@ class StageBase(TargetBase, ClearBase, GenBase): |
66 |
""" |
67 |
self.settings["chroot_path"] = normpath(self.settings["storedir"] + |
68 |
"/tmp/" + self.settings["target_subpath"].rstrip('/')) |
69 |
- self.chroot_lock = LockDir(self.settings["chroot_path"]) |
70 |
|
71 |
def set_autoresume_path(self): |
72 |
self.settings["autoresume_path"] = normpath(pjoin( |
73 |
@@ -1366,8 +1362,10 @@ class StageBase(TargetBase, ClearBase, GenBase): |
74 |
pass |
75 |
|
76 |
def run(self): |
77 |
- self.chroot_lock.write_lock() |
78 |
+ with fasteners.InterProcessLock(self.settings["chroot_path"] + '.lock'): |
79 |
+ return self._run() |
80 |
|
81 |
+ def _run(self): |
82 |
if "clear-autoresume" in self.settings["options"]: |
83 |
self.clear_autoresume() |
84 |
|
85 |
diff --git a/catalyst/lock.py b/catalyst/lock.py |
86 |
deleted file mode 100644 |
87 |
index e31745b2..00000000 |
88 |
--- a/catalyst/lock.py |
89 |
+++ /dev/null |
90 |
@@ -1,58 +0,0 @@ |
91 |
- |
92 |
-import os |
93 |
- |
94 |
-from contextlib import contextmanager |
95 |
- |
96 |
-from snakeoil import fileutils |
97 |
-from snakeoil import osutils |
98 |
-from catalyst.fileops import ensure_dirs |
99 |
- |
100 |
- |
101 |
-LockInUse = osutils.LockException |
102 |
- |
103 |
-class Lock: |
104 |
- """ |
105 |
- A fnctl-based filesystem lock |
106 |
- """ |
107 |
- def __init__(self, lockfile): |
108 |
- fileutils.touch(lockfile, mode=0o664) |
109 |
- os.chown(lockfile, uid=-1, gid=250) |
110 |
- self.lock = osutils.FsLock(lockfile) |
111 |
- |
112 |
- def read_lock(self): |
113 |
- self.lock.acquire_read_lock() |
114 |
- |
115 |
- def write_lock(self): |
116 |
- self.lock.acquire_write_lock() |
117 |
- |
118 |
- def unlock(self): |
119 |
- # Releasing a write lock is the same as a read lock. |
120 |
- self.lock.release_write_lock() |
121 |
- |
122 |
-class LockDir(Lock): |
123 |
- """ |
124 |
- A fnctl-based filesystem lock in a directory |
125 |
- """ |
126 |
- def __init__(self, lockdir): |
127 |
- ensure_dirs(lockdir) |
128 |
- lockfile = os.path.join(lockdir, '.catalyst_lock') |
129 |
- |
130 |
- Lock.__init__(self, lockfile) |
131 |
- |
132 |
-@contextmanager |
133 |
-def read_lock(filename): |
134 |
- lock = Lock(filename) |
135 |
- lock.read_lock() |
136 |
- try: |
137 |
- yield |
138 |
- finally: |
139 |
- lock.unlock() |
140 |
- |
141 |
-@contextmanager |
142 |
-def write_lock(filename): |
143 |
- lock = Lock(filename) |
144 |
- lock.write_lock() |
145 |
- try: |
146 |
- yield |
147 |
- finally: |
148 |
- lock.unlock() |
149 |
diff --git a/catalyst/targets/snapshot.py b/catalyst/targets/snapshot.py |
150 |
index b494575a..ef68765d 100644 |
151 |
--- a/catalyst/targets/snapshot.py |
152 |
+++ b/catalyst/targets/snapshot.py |
153 |
@@ -5,11 +5,12 @@ Snapshot target |
154 |
import subprocess |
155 |
import sys |
156 |
|
157 |
+import fasteners |
158 |
+ |
159 |
from pathlib import Path |
160 |
|
161 |
from catalyst import log |
162 |
from catalyst.base.targetbase import TargetBase |
163 |
-from catalyst.lock import write_lock |
164 |
from catalyst.support import CatalystError, command |
165 |
|
166 |
class snapshot(TargetBase): |
167 |
@@ -93,8 +94,7 @@ class snapshot(TargetBase): |
168 |
log.notice('>>> ' + ' '.join([*git_cmd, '|'])) |
169 |
log.notice(' ' + ' '.join(tar2sqfs_cmd)) |
170 |
|
171 |
- lockfile = self.snapshot.with_suffix('.lock') |
172 |
- with write_lock(lockfile): |
173 |
+ with fasteners.InterProcessLock(self.snapshot.with_suffix('.lock')): |
174 |
git = subprocess.Popen(git_cmd, |
175 |
stdout=subprocess.PIPE, |
176 |
stderr=sys.stderr, |
177 |
-- |
178 |
2.31.1 |