* [PATCH v2 2/5] src/t_immutable: factor out some helpers
2021-02-10 19:03 [PATCH v2 0/5] Tests for overlayfs immutable/append-only files Amir Goldstein
2021-02-10 19:03 ` [PATCH v2 1/5] overlay/030: Update comment w.r.t upstream kernel Amir Goldstein
@ 2021-02-10 19:03 ` Amir Goldstein
2021-02-10 19:03 ` [PATCH v2 3/5] src/t_immutable: Allow setting flags on existing files Amir Goldstein
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: Amir Goldstein @ 2021-02-10 19:03 UTC (permalink / raw)
To: Eryu Guan
Cc: Miklos Szeredi, Icenowy Zheng, Chengguang Xu, linux-unionfs, fstests
Reduce boilerplate code.
define _GNU_SOURCE needed for asprintf.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
---
src/t_immutable.c | 221 ++++++++++++++++++++++------------------------
1 file changed, 104 insertions(+), 117 deletions(-)
diff --git a/src/t_immutable.c b/src/t_immutable.c
index 86c567ed..7431e75d 100644
--- a/src/t_immutable.c
+++ b/src/t_immutable.c
@@ -8,6 +8,9 @@
#define TEST_UTIME
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@@ -1895,13 +1898,66 @@ static int check_test_area(const char *dir)
return 0;
}
+static int create_dir(char **ppath, const char *fmt, const char *dir)
+{
+ const char *path;
+ struct stat st;
+
+ if (asprintf(ppath, fmt, dir) == -1) {
+ return 1;
+ }
+ path = *ppath;
+ if (stat(path, &st) == 0) {
+ fprintf(stderr, "%s: Test area directory %s must not exist for test area creation.\n",
+ __progname, path);
+ return 1;
+ }
+ if (mkdir(path, 0777) != 0) {
+ fprintf(stderr, "%s: error creating directory %s: %s\n", __progname, path, strerror(errno));
+ return 1;
+ }
+ return 0;
+}
+
+static int create_file(char **ppath, const char *fmt, const char *dir)
+{
+ const char *path;
+ int fd;
+
+ if (asprintf(ppath, fmt, dir) == -1) {
+ return 1;
+ }
+ path = *ppath;
+ if ((fd = open(path, O_WRONLY|O_CREAT|O_EXCL, 0666)) == -1) {
+ fprintf(stderr, "%s: error creating file %s: %s\n", __progname, path, strerror(errno));
+ return 1;
+ }
+ return fd;
+}
+
+static int create_xattrs(int fd)
+{
+ if (fsetxattr(fd, "trusted.test", "readonly", strlen("readonly"), XATTR_CREATE) != 0) {
+ if (errno != EOPNOTSUPP) {
+ perror("setxattr");
+ return 1;
+ }
+ }
+ if (fsetxattr(fd, "user.test", "readonly", strlen("readonly"), XATTR_CREATE) != 0) {
+ if (errno != EOPNOTSUPP) {
+ perror("setxattr");
+ return 1;
+ }
+ }
+ return 0;
+}
+
static int create_test_area(const char *dir)
{
int fd;
char *path;
static const char *acl_u_text = "u::rw-,g::rw-,o::rw-,u:nobody:rw-,m::rw-";
static const char *acl_u_text_d = "u::rwx,g::rwx,o::rwx,u:nobody:rwx,m::rwx";
- struct stat st;
static const char *immutable = "This is an immutable file.\nIts contents cannot be altered.\n";
static const char *append_only = "This is an append-only file.\nIts contents cannot be altered.\n"
"Data can only be appended.\n---\n";
@@ -1911,79 +1967,45 @@ static int create_test_area(const char *dir)
return 1;
}
- if (stat(dir, &st) == 0) {
- fprintf(stderr, "%s: Test area directory %s must not exist for test area creation.\n",
- __progname, dir);
- return 1;
- }
-
umask(0000);
- if (mkdir(dir, 0777) != 0) {
- fprintf(stderr, "%s: error creating directory %s: %s\n", __progname, dir, strerror(errno));
+ if (create_dir(&path, "%s", dir)) {
return 1;
}
-
- asprintf(&path, "%s/immutable.d", dir);
- if (mkdir(path, 0777) != 0) {
- fprintf(stderr, "%s: error creating directory %s: %s\n", __progname, path, strerror(errno));
- return 1;
- }
- free(path);
-
- asprintf(&path, "%s/empty-immutable.d", dir);
- if (mkdir(path, 0777) != 0) {
- fprintf(stderr, "%s: error creating directory %s: %s\n", __progname, path, strerror(errno));
- return 1;
- }
free(path);
- asprintf(&path, "%s/append-only.d", dir);
- if (mkdir(path, 0777) != 0) {
- fprintf(stderr, "%s: error creating directory %s: %s\n", __progname, path, strerror(errno));
- return 1;
+ if (create_dir(&path, "%s/append-only.d", dir)) {
+ return 1;
}
free(path);
- asprintf(&path, "%s/empty-append-only.d", dir);
- if (mkdir(path, 0777) != 0) {
- fprintf(stderr, "%s: error creating directory %s: %s\n", __progname, path, strerror(errno));
- return 1;
+ if (create_dir(&path, "%s/append-only.d/dir", dir)) {
+ return 1;
}
free(path);
- asprintf(&path, "%s/immutable.d/dir", dir);
- if (mkdir(path, 0777) != 0) {
- fprintf(stderr, "%s: error creating directory %s: %s\n", __progname, path, strerror(errno));
+ if ((fd = create_file(&path, "%s/append-only.d/file", dir)) == -1) {
return 1;
}
+ close(fd);
free(path);
- asprintf(&path, "%s/append-only.d/dir", dir);
- if (mkdir(path, 0777) != 0) {
- fprintf(stderr, "%s: error creating directory %s: %s\n", __progname, path, strerror(errno));
- return 1;
+ if (create_dir(&path, "%s/immutable.d", dir)) {
+ return 1;
}
free(path);
- asprintf(&path, "%s/append-only.d/file", dir);
- if ((fd = open(path, O_WRONLY|O_CREAT|O_EXCL, 0666)) == -1) {
- fprintf(stderr, "%s: error creating file %s: %s\n", __progname, path, strerror(errno));
- return 1;
+ if (create_dir(&path, "%s/immutable.d/dir", dir)) {
+ return 1;
}
- close(fd);
free(path);
- asprintf(&path, "%s/immutable.d/file", dir);
- if ((fd = open(path, O_WRONLY|O_CREAT|O_EXCL, 0666)) == -1) {
- fprintf(stderr, "%s: error creating file %s: %s\n", __progname, path, strerror(errno));
+ if ((fd = create_file(&path, "%s/immutable.d/file", dir)) == -1) {
return 1;
}
close(fd);
free(path);
- asprintf(&path, "%s/immutable.f", dir);
- if ((fd = open(path, O_WRONLY|O_CREAT|O_EXCL, 0666)) == -1) {
- fprintf(stderr, "%s: error creating file %s: %s\n", __progname, path, strerror(errno));
+ if ((fd = create_file(&path, "%s/immutable.f", dir)) == -1) {
return 1;
}
if (write(fd, immutable, strlen(immutable)) != strlen(immutable)) {
@@ -1994,17 +2016,8 @@ static int create_test_area(const char *dir)
perror("acl");
return 1;
}
- if (fsetxattr(fd, "trusted.test", "readonly", strlen("readonly"), XATTR_CREATE) != 0) {
- if (errno != EOPNOTSUPP) {
- perror("setxattr");
- return 1;
- }
- }
- if (fsetxattr(fd, "user.test", "readonly", strlen("readonly"), XATTR_CREATE) != 0) {
- if (errno != EOPNOTSUPP) {
- perror("setxattr");
- return 1;
- }
+ if (create_xattrs(fd)) {
+ return 1;
}
if (fsetflag(path, fd, 1, 1)) {
perror("fsetflag");
@@ -2014,8 +2027,7 @@ static int create_test_area(const char *dir)
close(fd);
free(path);
- asprintf(&path, "%s/append-only.f", dir);
- if ((fd = open(path, O_WRONLY|O_CREAT|O_EXCL, 0666)) == -1) {
+ if ((fd = create_file(&path, "%s/append-only.f", dir)) == -1) {
fprintf(stderr, "%s: error creating file %s: %s\n", __progname, path, strerror(errno));
return 1;
}
@@ -2027,17 +2039,8 @@ static int create_test_area(const char *dir)
perror("acl");
return 1;
}
- if (fsetxattr(fd, "trusted.test", "readonly", strlen("readonly"), XATTR_CREATE) != 0) {
- if (errno != EOPNOTSUPP) {
- perror("setxattr");
- return 1;
- }
- }
- if (fsetxattr(fd, "user.test", "readonly", strlen("readonly"), XATTR_CREATE) != 0) {
- if (errno != EOPNOTSUPP) {
- perror("setxattr");
- return 1;
- }
+ if (create_xattrs(fd)) {
+ return 1;
}
if (fsetflag(path, fd, 1, 0)) {
perror("fsetflag");
@@ -2056,17 +2059,8 @@ static int create_test_area(const char *dir)
perror("acl");
return 1;
}
- if (fsetxattr(fd, "trusted.test", "readonly", strlen("readonly"), XATTR_CREATE) != 0) {
- if (errno != EOPNOTSUPP) {
- perror("setxattr");
- return 1;
- }
- }
- if (fsetxattr(fd, "user.test", "readonly", strlen("readonly"), XATTR_CREATE) != 0) {
- if (errno != EOPNOTSUPP) {
- perror("setxattr");
- return 1;
- }
+ if (create_xattrs(fd)) {
+ return 1;
}
if (fsetflag(path, fd, 1, 1)) {
perror("fsetflag");
@@ -2076,7 +2070,9 @@ static int create_test_area(const char *dir)
close(fd);
free(path);
- asprintf(&path, "%s/empty-immutable.d", dir);
+ if (create_dir(&path, "%s/empty-immutable.d", dir)) {
+ return 1;
+ }
if ((fd = open(path, O_RDONLY)) == -1) {
fprintf(stderr, "%s: error opening %s: %s\n", __progname, path, strerror(errno));
return 1;
@@ -2098,17 +2094,8 @@ static int create_test_area(const char *dir)
perror("acl");
return 1;
}
- if (fsetxattr(fd, "trusted.test", "readonly", strlen("readonly"), XATTR_CREATE) != 0) {
- if (errno != EOPNOTSUPP) {
- perror("setxattr");
- return 1;
- }
- }
- if (fsetxattr(fd, "user.test", "readonly", strlen("readonly"), XATTR_CREATE) != 0) {
- if (errno != EOPNOTSUPP) {
- perror("setxattr");
- return 1;
- }
+ if (create_xattrs(fd)) {
+ return 1;
}
if (fsetflag(path, fd, 1, 0)) {
perror("fsetflag");
@@ -2118,7 +2105,9 @@ static int create_test_area(const char *dir)
close(fd);
free(path);
- asprintf(&path, "%s/empty-append-only.d", dir);
+ if (create_dir(&path, "%s/empty-append-only.d", dir)) {
+ return 1;
+ }
if ((fd = open(path, O_RDONLY)) == -1) {
fprintf(stderr, "%s: error opening %s: %s\n", __progname, path, strerror(errno));
return 1;
@@ -2242,6 +2231,7 @@ int main(int argc, char **argv)
{
int ret;
int failed = 0;
+ int runtest = 1, create = 0, remove = 0;
/* this arg parsing is gross, but who cares, its a test program */
@@ -2251,32 +2241,29 @@ int main(int argc, char **argv)
}
if (!strcmp(argv[1], "-c")) {
- if (argc == 3) {
- if ((ret = create_test_area(argv[argc-1])))
- return ret;
- } else {
- fprintf(stderr, "usage: t_immutable -c test_area_dir\n");
- return 1;
- }
+ create = 1;
} else if (!strcmp(argv[1], "-C")) {
- if (argc == 3) {
- return create_test_area(argv[argc-1]);
- } else {
- fprintf(stderr, "usage: t_immutable -C test_area_dir\n");
- return 1;
- }
+ /* Prepare test area without running tests */
+ create = 1;
+ runtest = 0;
} else if (!strcmp(argv[1], "-r")) {
- if (argc == 3)
- return remove_test_area(argv[argc-1]);
- else {
- fprintf(stderr, "usage: t_immutable -r test_area_dir\n");
- return 1;
- }
- } else if (argc != 2) {
- fprintf(stderr, "usage: t_immutable [-c|-r] test_area_dir\n");
+ remove = 1;
+ }
+
+ if (argc != 2 + (create | remove)) {
+ fprintf(stderr, "usage: t_immutable [-C|-c|-r] test_area_dir\n");
return 1;
}
+ if (create) {
+ ret = create_test_area(argv[argc-1]);
+ if (ret || !runtest) {
+ return ret;
+ }
+ } else if (remove) {
+ return remove_test_area(argv[argc-1]);
+ }
+
umask(0000);
if (check_test_area(argv[argc-1]))
--
2.25.1
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH v2 3/5] src/t_immutable: Allow setting flags on existing files
2021-02-10 19:03 [PATCH v2 0/5] Tests for overlayfs immutable/append-only files Amir Goldstein
2021-02-10 19:03 ` [PATCH v2 1/5] overlay/030: Update comment w.r.t upstream kernel Amir Goldstein
2021-02-10 19:03 ` [PATCH v2 2/5] src/t_immutable: factor out some helpers Amir Goldstein
@ 2021-02-10 19:03 ` Amir Goldstein
2021-02-10 19:03 ` [PATCH v2 4/5] overlay: Test lost immutable/append-only flags on copy-up Amir Goldstein
2021-02-10 19:03 ` [PATCH v2 5/5] overlay: Regression test for deadlock on directory ioctl Amir Goldstein
4 siblings, 0 replies; 6+ messages in thread
From: Amir Goldstein @ 2021-02-10 19:03 UTC (permalink / raw)
To: Eryu Guan
Cc: Miklos Szeredi, Icenowy Zheng, Chengguang Xu, linux-unionfs, fstests
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>
---
src/t_immutable.c | 30 ++++++++++++++++++++++++------
1 file changed, 24 insertions(+), 6 deletions(-)
diff --git a/src/t_immutable.c b/src/t_immutable.c
index 7431e75d..0611e193 100644
--- a/src/t_immutable.c
+++ b/src/t_immutable.c
@@ -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) {
--
2.25.1
^ permalink raw reply related [flat|nested] 6+ messages in thread