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set_up.py
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set_up.py
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#
# Create and set up a lower layer for the test scripts to use
#
from tool_box import *
import os, shutil
def create_file(name, content):
fd = open(name, "w")
fd.write(content)
fd.close()
# Cleanup old test mounts regardless of the current test setup, because old
# test may have used a different setup (e.g. samefs vs. non-samefs).
def clean_up(cfg):
base_mntroot = cfg.base_mntroot()
lower_mntroot = cfg.old_lower_mntroot()
upper_mntroot = cfg.old_upper_mntroot()
union_mntroot = cfg.old_union_mntroot()
os.sync()
try:
while system("grep -q ' " + union_mntroot + " ' /proc/mounts" +
" && umount " + union_mntroot):
pass
except RuntimeError:
pass
try:
while system("grep -q 'lower_layer " + lower_mntroot + " ' /proc/mounts" +
" && umount " + lower_mntroot):
pass
except RuntimeError:
pass
try:
# Cleanup middle/upper/nested layers from [--ov|--ovov] --maxfs=M setup
while system("grep -q '_layer " + upper_mntroot + "/.[0-9]* ' /proc/mounts" +
" && umount " + upper_mntroot + "/* 2>/dev/null"):
pass
except RuntimeError:
pass
try:
while system("grep -q '_layer " + upper_mntroot + " ' /proc/mounts" +
" && umount " + upper_mntroot):
pass
except RuntimeError:
pass
try:
# Cleanup middle/upper/nested layers and overlay mount from setup with basedir
while system("grep -q ' " + base_mntroot + "/.[0-9]* ' /proc/mounts" +
" && umount " + base_mntroot + "/* 2>/dev/null"):
pass
except RuntimeError:
pass
try:
# Cleanup basefs mount from --ov --samefs setup
while system("grep -q 'lower_layer " + base_mntroot + " ' /proc/mounts" +
" && umount " + base_mntroot):
pass
except RuntimeError:
pass
def set_up(ctx):
cfg = ctx.config()
base_mntroot = cfg.base_mntroot()
lower_mntroot = cfg.lower_mntroot()
union_mntroot = cfg.union_mntroot()
lowerdir = cfg.lowerdir()
lowerimg = cfg.lowerimg()
testdir = cfg.testdir()
if cfg.should_mount_base():
# Create base fs for all layers and union mount point
system("mount " + base_mntroot + " 2>/dev/null"
" || mount -t tmpfs lower_layer " + base_mntroot)
system("mount --make-private " + base_mntroot)
if cfg.should_use_base():
try:
if lower_mntroot.startswith(base_mntroot):
os.mkdir(lower_mntroot)
if union_mntroot.startswith(base_mntroot):
os.mkdir(union_mntroot)
except OSError:
# Cleanup leftover layers from previous run in case base fs is not tmpfs
if base_mntroot:
system("rm -rf " + base_mntroot + "/*")
if lower_mntroot.startswith(base_mntroot):
os.mkdir(lower_mntroot)
if union_mntroot.startswith(base_mntroot):
os.mkdir(union_mntroot)
if cfg.should_mount_lower():
# Create a lower layer to union over
system("mount " + lower_mntroot + " 2>/dev/null"
" || mount -t tmpfs lower_layer " + lower_mntroot)
system("mount --make-private " + lower_mntroot)
#
# Create a few test files we can use in the lower layer
#
try:
os.mkdir(lowerdir)
except OSError:
system("rm -rf " + lowerdir)
os.mkdir(lowerdir)
pieces = testdir.split("/")
del pieces[0]
path = ""
for i in pieces:
path += "/" + i
ctx.record_file(path, "d")
ctx.set_cwd(testdir)
for i in range(100, 130):
si = str(i)
# Under the test directory, we create a bunch of regular files
# containing data called foo100 to foo129:
create_file(lowerdir + "/foo" + si, ":xxx:yyy:zzz")
rec = ctx.record_file("foo" + si, "r")
# Then we create a bunch of direct symlinks to those files
to = "../a/foo" + si
os.symlink(to, lowerdir + "/direct_sym" + si)
rec = ctx.record_file("direct_sym" + si, "s", to, rec)
# Then we create a bunch of indirect symlinks to those files
to = "direct_sym" + si
os.symlink(to, lowerdir + "/indirect_sym" + si)
ctx.record_file("indirect_sym" + si, "s", to, rec)
# Then we create a bunch symlinks that don't point to extant files
to = "no_foo" + si
os.symlink(to, lowerdir + "/pointless" + si)
rec = ctx.record_file("no_foo" + si, None)
ctx.record_file("pointless" + si, "s", to, rec)
# We create a bunch of directories, each with an empty file
# and a populated subdir
os.mkdir(lowerdir + "/dir" + si)
rec = ctx.record_file("dir" + si, "d")
create_file(lowerdir + "/dir" + si + "/a", "")
ctx.record_file("dir" + si + "/a", "f")
os.mkdir(lowerdir + "/dir" + si + "/pop")
ctx.record_file("dir" + si + "/pop", "d")
create_file(lowerdir + "/dir" + si + "/pop/b", ":aaa:bbb:ccc")
ctx.record_file("dir" + si + "/pop/b", "f")
os.mkdir(lowerdir + "/dir" + si + "/pop/c")
ctx.record_file("dir" + si + "/pop/c", "d")
# And add direct and indirect symlinks to those
to = "../a/dir" + si
os.symlink(to, lowerdir + "/direct_dir_sym" + si)
rec = ctx.record_file("direct_dir_sym" + si, "s", to, rec)
#ctx.record_file("direct_dir_sym" + si + "/a", "f")
to = "direct_dir_sym" + si
os.symlink(to, lowerdir + "/indirect_dir_sym" + si)
ctx.record_file("indirect_dir_sym" + si, "s", to, rec)
#ctx.record_file("indirect_dir_sym" + si + "/a", "f")
# And a bunch of empty directories
os.mkdir(lowerdir + "/empty" + si)
ctx.record_file("empty" + si, "d")
# Everything above is then owned by the bin user
for f in [ "foo", "direct_sym", "indirect_sym", "pointless" ]:
os.lchown(lowerdir + "/" + f + si, 1, 1)
# Create some root-owned regular files also
create_file(lowerdir + "/rootfile" + si, ":xxx:yyy:zzz")
ctx.record_file("rootfile" + si, "r")
# Non-existent dir
ctx.record_file("no_dir" + si, None)
if cfg.is_squashfs():
system("mksquashfs " + lowerdir + " " + lowerimg + " -keep-as-directory > /dev/null");
system("mount -o loop,ro " + lowerimg + " " + lower_mntroot)
system("mount --make-private " + lower_mntroot)
if cfg.is_erofs():
import tempfile
with tempfile.TemporaryDirectory() as tmpdirname:
system("cp -fR " + lowerdir + " " + tmpdirname)
system("mkfs.erofs " + lowerimg + " " + tmpdirname + " > /dev/null");
system("mount -t erofs -o loop,ro " + lowerimg + " " + lower_mntroot)
system("mount --make-private " + lower_mntroot)
elif cfg.should_mount_lower_ro():
# Make overlay lower layer read-only
system("mount -o remount,ro " + lower_mntroot)
ctx.note_lower_fs(lowerdir)