usage: open_by_handle -cp <test_dir> [N]
usage: open_by_handle -p <test_dir> [N]
usage: open_by_handle -dp <test_dir> [N]
With -p flag, create/delete also the test_dir itself and try to open by
handle also test_dir itself after droping caches and use dir fd to test
faccessat() of a file inside dir.
mount_fd argument to open_by_handle_at() is open fd of test_dir's parent.
Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx>
---
src/open_by_handle.c | 114 +++++++++++++++++++++++++++++++++++++++++++++------
1 file changed, 101 insertions(+), 13 deletions(-)
diff --git a/src/open_by_handle.c b/src/open_by_handle.c
index 581dc05..e8edcf5 100644
--- a/src/open_by_handle.c
+++ b/src/open_by_handle.c
@@ -27,13 +27,13 @@
/*
-usage: open_by_handle [-cludmrwa] <test_dir> [num_files]
+usage: open_by_handle [-cludmrwap] <test_dir> [num_files]
Examples:
-1. Create test set of N files and try to get their NFS handles:
+1. Create test set of of test_dir with N files and try to get their NFS handles:
- open_by_handle -c <test_dir> [N]
+ open_by_handle -cp <test_dir> [N]
This is used by new helper _require_exportfs() to check
if filesystem supports exportfs
@@ -41,7 +41,7 @@ Examples:
2. Get file handles for existing test set, drop caches and try to
open all files by handle:
- open_by_handle <test_dir> [N]
+ open_by_handle -p <test_dir> [N]
3. Get file handles for existing test set, write data to files,
drop caches, open all files by handle, read and verify written
@@ -50,9 +50,10 @@ Examples:
open_by_handle -rwa <test_dir> [N]
4. Get file handles for existing test set, unlink all test files,
- drop caches, try to open all files by handle and expect ESTALE:
+ remove test_dir, drop caches, try to open all files by handle
+ and expect ESTALE:
- open_by_handle -d <test_dir> [N]
+ open_by_handle -dp <test_dir> [N]
5. Get file handles for existing test set, rename all test files,
drop caches, try to open all files by handle (should work):
@@ -85,17 +86,18 @@ Examples:
#include <sys/types.h>
#include <errno.h>
#include <linux/limits.h>
+#include <libgen.h>
#define MAXFILES 1024
struct handle {
struct file_handle fh;
unsigned char fid[MAX_HANDLE_SZ];
-} handle[MAXFILES];
+} handle[MAXFILES], dir_handle;
void usage(void)
{
- fprintf(stderr, "usage: open_by_handle [-cludmrwa] <test_dir> [num_files]\n");
+ fprintf(stderr, "usage: open_by_handle [-cludmrwap] <test_dir> [num_files]\n");
fprintf(stderr, "\n");
fprintf(stderr, "open_by_handle -c <test_dir> [N] - create N test files under test_dir, try to get file handles and exit\n");
fprintf(stderr, "open_by_handle <test_dir> [N] - get file handles of test files, drop caches and try to open by handle\n");
@@ -106,6 +108,7 @@ void usage(void)
fprintf(stderr, "open_by_handle -u <test_dir> [N] - unlink (hardlinked) test files, drop caches and try to open by handle\n");
fprintf(stderr, "open_by_handle -d <test_dir> [N] - unlink test files and hardlinks, drop caches and try to open by handle\n");
fprintf(stderr, "open_by_handle -m <test_dir> [N] - rename test files, drop caches and try to open by handle\n");
+ fprintf(stderr, "open_by_handle -p <test_dir> - create/delete and try to open by handle also test_dir itself\n");
exit(EXIT_FAILURE);
}
@@ -113,20 +116,22 @@ int main(int argc, char **argv)
{
int i, c;
int fd;
- int ret;
+ int ret = 0;
int failed = 0;
+ char dname[PATH_MAX];
char fname[PATH_MAX];
char fname2[PATH_MAX];
char *test_dir;
+ char *mount_dir;
int mount_fd, mount_id;
int numfiles = 1;
int create = 0, delete = 0, nlink = 1, move = 0;
- int rd = 0, wr = 0, wrafter = 0;
+ int rd = 0, wr = 0, wrafter = 0, parent = 0;
if (argc < 2 || argc > 4)
usage();
- while ((c = getopt(argc, argv, "cludmrwa")) != -1) {
+ while ((c = getopt(argc, argv, "cludmrwap")) != -1) {
switch (c) {
case 'c':
create = 1;
@@ -157,6 +162,9 @@ int main(int argc, char **argv)
case 'm':
move = 1;
break;
+ case 'p':
+ parent = 1;
+ break;
default:
fprintf(stderr, "illegal option '%s'\n", argv[optind]);
case 'h':
@@ -173,9 +181,27 @@ int main(int argc, char **argv)
usage();
}
- mount_fd = open(test_dir, O_RDONLY|O_DIRECTORY);
+ if (parent) {
+ strcpy(dname, test_dir);
+ /*
+ * -p flag implies that test_dir is NOT a mount point,
+ * so its parent can be used as mount_fd for open_by_handle_at.
+ */
+ mount_dir = dirname(dname);
+ if (create)
+ ret = mkdir(test_dir, 0700);
+ if (ret < 0 && errno != EEXIST) {
+ strcat(dname, ": mkdir");
+ perror(dname);
+ return EXIT_FAILURE;
+ }
+ } else {
+ mount_dir = test_dir;
+ }
+
+ mount_fd = open(mount_dir, O_RDONLY|O_DIRECTORY);
if (mount_fd < 0) {
- perror(test_dir);
+ perror(mount_dir);
return EXIT_FAILURE;
}
@@ -216,6 +242,16 @@ int main(int argc, char **argv)
}
}
+ if (parent) {
+ dir_handle.fh.handle_bytes = MAX_HANDLE_SZ;
+ ret = name_to_handle_at(AT_FDCWD, test_dir, &dir_handle.fh, &mount_id, 0);
+ if (ret < 0) {
+ strcat(dname, ": name_to_handle");
+ perror(dname);
+ return EXIT_FAILURE;
+ }
+ }
+
/* write data to files */
for (i=0; wr && i < numfiles; i++) {
sprintf(fname, "%s/file%06d", test_dir, i);
@@ -281,6 +317,15 @@ int main(int argc, char **argv)
}
}
+ if (parent && delete && !nlink) {
+ ret = rmdir(test_dir);
+ if (ret < 0) {
+ strcat(dname, ": rmdir");
+ perror(dname);
+ return EXIT_FAILURE;
+ }
+ }
+
/* sync to get log forced for unlink transactions to hit the disk */
sync();
@@ -339,6 +384,49 @@ int main(int argc, char **argv)
}
failed++;
}
+
+ if (parent) {
+ fd = open_by_handle_at(mount_fd, &dir_handle.fh, O_RDONLY|O_DIRECTORY);
+ if (fd >= 0) {
+ if (!nlink) {
+ printf("open_by_handle(%s) opened an unlinked dir!\n", dname);
+ return EXIT_FAILURE;
+ } else {
+ /*
+ * Sanity check dir fd - expect to access orig file IFF
+ * it was not unlinked nor renamed.
+ */
+ strcpy(fname, "file000000");
+ ret = faccessat(fd, fname, F_OK, 0);
+ if ((ret == 0) != (!delete && !move) ||
+ ((ret < 0) && errno != ENOENT)) {
+ strcat(fname, ": unexpected result from faccessat");
+ perror(fname);
+ return EXIT_FAILURE;
+ }
+ /*
+ * Expect to access link file if ran test with -l flag
+ * (nlink > 1), -m flag (orig moved to link name) or
+ * -u flag (which implied previous -l run).
+ */
+ strcpy(fname2, "link000000");
+ ret = faccessat(fd, fname2, F_OK, 0);
+ if (ret < 0 && (nlink > 1 || delete || move ||
+ errno != ENOENT)) {
+ strcat(fname2, ": unexpected result from faccessat");
+ perror(fname2);
+ return EXIT_FAILURE;
+ }
+ }
+ close(fd);
+ } else if (nlink || !(errno == ENOENT || errno == ESTALE)) {
+ printf("open_by_handle(%s) returned %d incorrectly on %s dir!\n",
+ dname, errno,
+ nlink ? "a linked" : "an unlinked");
+ return EXIT_FAILURE;
+ }
+ }
+
if (failed)
return EXIT_FAILURE;
return EXIT_SUCCESS;
--
2.7.4
