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src/t_immutable: Allow setting flags on existing files

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For overlayfs tests we need to be able to setflags on existing
(lower) files.

t_immutable -C test_dir

Creates the test area and sets flags, but it also allows setting flags
on an existing test area.

t_immutable -R test_dir

Removes the flags from existing test area, but does not remove the files
in the test area.

To setup a test area with file without flags, need to run the -C and -R
commands.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
This commit is contained in:
Amir Goldstein
2021-02-10 21:03:32 +02:00
committed by Eryu Guan
parent ce4616c9b7
commit 8911efb91e
1 changed files with 24 additions and 6 deletions
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src/t_immutable.c
+24 -6
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@@ -1898,6 +1898,8 @@ static int check_test_area(const char *dir)
return 0;
}
static int allow_existing;
static int create_dir(char **ppath, const char *fmt, const char *dir)
{
const char *path;
@@ -1908,6 +1910,9 @@ static int create_dir(char **ppath, const char *fmt, const char *dir)
}
path = *ppath;
if (stat(path, &st) == 0) {
if (allow_existing && S_ISDIR(st.st_mode)) {
return 0;
}
fprintf(stderr, "%s: Test area directory %s must not exist for test area creation.\n",
__progname, path);
return 1;
@@ -1921,6 +1926,7 @@ static int create_dir(char **ppath, const char *fmt, const char *dir)
static int create_file(char **ppath, const char *fmt, const char *dir)
{
int flags = O_WRONLY|O_CREAT | (allow_existing ? 0 : O_EXCL);
const char *path;
int fd;
@@ -1928,7 +1934,7 @@ static int create_file(char **ppath, const char *fmt, const char *dir)
return 1;
}
path = *ppath;
if ((fd = open(path, O_WRONLY|O_CREAT|O_EXCL, 0666)) == -1) {
if ((fd = open(path, flags, 0666)) == -1) {
fprintf(stderr, "%s: error creating file %s: %s\n", __progname, path, strerror(errno));
return 1;
}
@@ -1937,13 +1943,15 @@ static int create_file(char **ppath, const char *fmt, const char *dir)
static int create_xattrs(int fd)
{
if (fsetxattr(fd, "trusted.test", "readonly", strlen("readonly"), XATTR_CREATE) != 0) {
int flags = allow_existing ? 0 : XATTR_CREATE;
if (fsetxattr(fd, "trusted.test", "readonly", strlen("readonly"), flags) != 0) {
if (errno != EOPNOTSUPP) {
perror("setxattr");
return 1;
}
}
if (fsetxattr(fd, "user.test", "readonly", strlen("readonly"), XATTR_CREATE) != 0) {
if (fsetxattr(fd, "user.test", "readonly", strlen("readonly"), flags) != 0) {
if (errno != EOPNOTSUPP) {
perror("setxattr");
return 1;
@@ -2214,6 +2222,10 @@ static int remove_test_area(const char *dir)
return 1;
}
if (allow_existing) {
return 0;
}
pid = fork();
if (!pid) {
execl("/bin/rm", "rm", "-rf", dir, NULL);
@@ -2236,7 +2248,7 @@ int main(int argc, char **argv)
/* this arg parsing is gross, but who cares, its a test program */
if (argc < 2) {
fprintf(stderr, "usage: t_immutable [-C|-c|-r] test_area_dir\n");
fprintf(stderr, "usage: t_immutable [-C|-c|-R|-r] test_area_dir\n");
return 1;
}
@@ -2246,18 +2258,24 @@ int main(int argc, char **argv)
/* Prepare test area without running tests */
create = 1;
runtest = 0;
/* With existing test area, only setflags */
allow_existing = 1;
} else if (!strcmp(argv[1], "-r")) {
remove = 1;
} else if (!strcmp(argv[1], "-R")) {
/* Cleanup flags on test area but leave the files */
remove = 1;
allow_existing = 1;
}
if (argc != 2 + (create | remove)) {
fprintf(stderr, "usage: t_immutable [-C|-c|-r] test_area_dir\n");
fprintf(stderr, "usage: t_immutable [-C|-c|-R|-r] test_area_dir\n");
return 1;
}
if (create) {
ret = create_test_area(argv[argc-1]);
if (ret || !runtest) {
if (ret || allow_existing || !runtest) {
return ret;
}
} else if (remove) {