* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
+/*
+
+usage: open_by_handle [-c|-l|-u|-d] <test_dir> [num_files]
+
+Examples:
+
+1. Create test set of N files and try to get their NFS handles:
+
+ open_by_handle -c <test_dir> [N]
+
+ This is used by new helper _require_exportfs() to check
+ if filesystem supports exportfs
+
+2. Get file handles for existing test set, drop caches and try to
+ open all files by handle:
+
+ open_by_handle <test_dir> [N]
+
+3. Get file handles for existing test set, unlink all test files,
+ drop caches, try to open all files by handle and expect ESTALE:
+
+ open_by_handle -d <test_dir> [N]
+
+4. Get file handles for existing test set, hardlink all test files,
+ then unlink the original files, drop caches and try to open all
+ files by handle (should work):
+
+ open_by_handle -l <test_dir> [N]
+ open_by_handle -u <test_dir> [N]
+
+ This test is done with 2 invocations of the program, first to
+ hardlink (-l) and then to unlink the originals (-u), because
+ we would like to be able to perform the hardlinks on overlay
+ lower layer and unlink on upper layer.
+
+ NOTE that open_by_handle -u doesn't check if the files are
+ hardlinked, it just assumes that they are. If they are not
+ then the test will fail, because file handles would be stale.
+*/
+
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <linux/limits.h>
-#define NUMFILES 1024
+#define MAXFILES 1024
struct handle {
struct file_handle fh;
unsigned char fid[MAX_HANDLE_SZ];
-} handle[NUMFILES];
+} handle[MAXFILES];
+
+void usage(void)
+{
+ fprintf(stderr, "usage: open_by_handle [-c|-l|-u|-d] <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");
+ fprintf(stderr, "open_by_handle -l <test_dir> [N] - create hardlinks to test files, drop caches and try to open by handle\n");
+ 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");
+ exit(EXIT_FAILURE);
+}
int main(int argc, char **argv)
{
- int i;
+ int i, c;
int fd;
int ret;
int failed = 0;
char fname[PATH_MAX];
+ char fname2[PATH_MAX];
char *test_dir;
int mount_fd, mount_id;
+ int numfiles = 1;
+ int create = 0, delete = 0, nlink = 1;
- if (argc != 2) {
- fprintf(stderr, "usage: open_by_handle <test_dir>\n");
- return EXIT_FAILURE;
+ if (argc < 2 || argc > 4)
+ usage();
+
+ while ((c = getopt(argc, argv, "clud")) != -1) {
+ switch (c) {
+ case 'c':
+ create = 1;
+ break;
+ case 'l':
+ nlink = 2;
+ break;
+ case 'u':
+ delete = 1;
+ nlink = 1;
+ break;
+ case 'd':
+ delete = 1;
+ nlink = 0;
+ break;
+ default:
+ fprintf(stderr, "illegal option '%s'\n", argv[optind]);
+ case 'h':
+ usage();
+ }
+ }
+ if (optind == argc || optind > 2)
+ usage();
+ test_dir = argv[optind++];
+ if (optind < argc)
+ numfiles = atoi(argv[optind]);
+ if (!numfiles || numfiles > MAXFILES) {
+ fprintf(stderr, "illegal value '%s' for num_files\n", argv[optind]);
+ usage();
}
- test_dir = argv[1];
mount_fd = open(test_dir, O_RDONLY|O_DIRECTORY);
if (mount_fd < 0) {
- perror("open test_dir");
+ perror(test_dir);
return EXIT_FAILURE;
}
/*
- * create a large number of files to force allocation of new inode
- * chunks on disk.
+ * Create the test files and remove leftover hardlinks from previous run
*/
- for (i=0; i < NUMFILES; i++) {
+ for (i=0; create && i < numfiles; i++) {
sprintf(fname, "%s/file%06d", test_dir, i);
+ sprintf(fname2, "%s/link%06d", test_dir, i);
fd = open(fname, O_RDWR | O_CREAT | O_TRUNC, 0644);
if (fd < 0) {
printf("Warning (%s,%d), open(%s) failed.\n", __FILE__, __LINE__, fname);
return EXIT_FAILURE;
}
close(fd);
+ /* blow up leftovers hardlinks if they exist */
+ ret = unlink(fname2);
+ if (ret < 0 && errno != ENOENT) {
+ perror("unlink");
+ return EXIT_FAILURE;
+ }
}
/* sync to get the new inodes to hit the disk */
sync();
/* create the handles */
- for (i=0; i < NUMFILES; i++) {
+ for (i=0; i < numfiles; i++) {
sprintf(fname, "%s/file%06d", test_dir, i);
handle[i].fh.handle_bytes = MAX_HANDLE_SZ;
ret = name_to_handle_at(AT_FDCWD, fname, &handle[i].fh, &mount_id, 0);
}
}
+ /* after creating test set only check that fs supports exportfs */
+ if (create)
+ return EXIT_SUCCESS;
+
+ /* hardlink the files */
+ for (i=0; nlink > 1 && i < numfiles; i++) {
+ sprintf(fname, "%s/file%06d", test_dir, i);
+ sprintf(fname2, "%s/link%06d", test_dir, i);
+ ret = link(fname, fname2);
+ if (ret < 0) {
+ perror("link");
+ return EXIT_FAILURE;
+ }
+ }
+
/* unlink the files */
- for (i=0; i < NUMFILES; i++) {
+ for (i=0; delete && i < numfiles; i++) {
sprintf(fname, "%s/file%06d", test_dir, i);
+ sprintf(fname2, "%s/link%06d", test_dir, i);
ret = unlink(fname);
if (ret < 0) {
perror("unlink");
return EXIT_FAILURE;
}
+ /* with -d flag, delete the hardlink if it exists */
+ if (!nlink)
+ ret = unlink(fname2);
+ if (ret < 0 && errno != ENOENT) {
+ perror("unlink");
+ return EXIT_FAILURE;
+ }
}
/* sync to get log forced for unlink transactions to hit the disk */
}
/*
- * now try to open the files by the stored handles. Expecting ENOENT
- * for all of them.
+ * now try to open the files by the stored handles. Expecting ESTALE
+ * if all files and their hardlinks have been unlinked.
*/
- for (i=0; i < NUMFILES; i++) {
+ for (i=0; i < numfiles; i++) {
errno = 0;
fd = open_by_handle_at(mount_fd, &handle[i].fh, O_RDWR);
- if (fd < 0 && (errno == ENOENT || errno == ESTALE)) {
+ if (nlink && fd >= 0) {
+ close(fd);
+ continue;
+ } else if (!nlink && fd < 0 && (errno == ENOENT || errno == ESTALE)) {
continue;
}
if (fd >= 0) {
printf("open_by_handle(%d) opened an unlinked file!\n", i);
close(fd);
- } else
- printf("open_by_handle(%d) returned %d incorrectly on an unlinked file!\n", i, errno);
+ } else {
+ printf("open_by_handle(%d) returned %d incorrectly on %s file!\n", i, errno,
+ nlink ? "a linked" : "an unlinked");
+ }
failed++;
}
if (failed)
git.samba.org / jlayton / xfstests.git / commitdiff