/*
-usage: open_by_handle [-cludmrwapk] <test_dir> [num_files]
+usage: open_by_handle [-cludmrwapk] [<-i|-o> <handles_file>] <test_dir> [num_files]
Examples:
open_by_handle -p <test_dir> [N]
-3. Get file handles for existing test set, write data to files,
+3. Get file handles for existing test set and write them to a file.
+ Read file handles from file and open files by handle:
+
+ open_by_handle -p -o <handles_file> <test_dir> [N]
+ open_by_handle -p -i <handles_file> <test_dir> [N]
+
+4. Get file handles for existing test set, write data to files,
drop caches, open all files by handle, read and verify written
data, write new data to file:
open_by_handle -rwa <test_dir> [N]
-4. Get file handles for existing test set, unlink all test files,
+5. Get file handles for existing test set, unlink all test files,
remove test_dir, drop caches, try to open all files by handle
and expect ESTALE:
open_by_handle -dp <test_dir> [N]
-5. Get file handles for existing test set, keep open file handles for all
+6. Get file handles for existing test set, keep open file handles for all
test files, unlink all test files, drop caches and try to open all files
by handle (should work):
open_by_handle -dk <test_dir> [N]
-6. Get file handles for existing test set, rename all test files,
+7. Get file handles for existing test set, rename all test files,
drop caches, try to open all files by handle (should work):
open_by_handle -m <test_dir> [N]
-7. Get file handles for existing test set, hardlink all test files,
+8. 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):
void usage(void)
{
- fprintf(stderr, "usage: open_by_handle [-cludmrwapk] <test_dir> [num_files]\n");
+ fprintf(stderr, "usage: open_by_handle [-cludmrwapk] [<-i|-o> <handles_file>] <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 -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");
+ fprintf(stderr, "open_by_handle -i <handles_file> <test_dir> [N] - read test files handles from file and try to open by handle\n");
+ fprintf(stderr, "open_by_handle -o <handles_file> <test_dir> [N] - get file handles of test files and write handles to file\n");
exit(EXIT_FAILURE);
}
char *test_dir;
char *mount_dir;
int mount_fd, mount_id;
+ char *infile = NULL, *outfile = NULL;
+ int in_fd = 0, out_fd = 0;
int numfiles = 1;
int create = 0, delete = 0, nlink = 1, move = 0;
int rd = 0, wr = 0, wrafter = 0, parent = 0;
int keepopen = 0;
- if (argc < 2 || argc > 4)
+ if (argc < 2)
usage();
- while ((c = getopt(argc, argv, "cludmrwapk")) != -1) {
+ while ((c = getopt(argc, argv, "cludmrwapki:o:")) != -1) {
switch (c) {
case 'c':
create = 1;
case 'k':
keepopen = 1;
break;
+ case 'i':
+ infile = optarg;
+ in_fd = open(infile, O_RDONLY);
+ if (in_fd < 0) {
+ perror(infile);
+ return EXIT_FAILURE;
+ }
+ break;
+ case 'o':
+ outfile = optarg;
+ out_fd = creat(outfile, 0644);
+ if (out_fd < 0) {
+ perror(outfile);
+ return EXIT_FAILURE;
+ }
+ break;
default:
fprintf(stderr, "illegal option '%s'\n", argv[optind]);
case 'h':
usage();
}
}
- if (optind == argc || optind > 2)
+ if (optind == argc)
usage();
test_dir = argv[optind++];
if (optind < argc)
usage();
}
- if (parent) {
+ /*
+ * The way we determine the mount_dir to be used for mount_fd argument
+ * for open_by_handle_at() depends on other command line arguments:
+ *
+ * -p flag usually (see -i below) implies that test_dir is NOT a mount
+ * point, but a directory inside a mount point that we will create
+ * and/or encode/decode during the test, so we use test_dir's parent
+ * for mount_fd. Even when not creatig test_dir, if we would use
+ * test_dir as mount_fd, then drop_caches will not drop the test_dir
+ * dcache entry.
+ *
+ * If -p is not specified, we don't have a hint whether test_dir is a
+ * mount point or not, so we assume the worst case, that it is a
+ * mount point and therefore, we cannnot use parent as mount_fd,
+ * because parent may be on a differnt file system.
+ *
+ * -i flag, even with -p flag, implies that test_dir IS a mount point,
+ * because we are testing open by handle of dir, which may have been
+ * deleted or renamed and we are not creating nor encoding the
+ * directory file handle. -i flag is meant to be used for tests
+ * after encoding file handles and mount cycle the file system. If
+ * we would require the test to pass in with -ip the test_dir we
+ * want to decode and not the mount point, that would have populated
+ * the dentry cache and the use of -ip flag combination would not
+ * allow testing decode of dir file handle in cold dcache scenario.
+ */
+ if (parent && !in_fd) {
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);
/* sync to get the new inodes to hit the disk */
sync();
- /* create the handles */
+ /*
+ * encode the file handles or read them from file (-i) and maybe store
+ * them to a file (-o).
+ */
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);
- if (ret < 0) {
- strcat(fname, ": name_to_handle");
- perror(fname);
- return EXIT_FAILURE;
+ if (in_fd) {
+ ret = read(in_fd, (char *)&handle[i], sizeof(*handle));
+ if (ret < sizeof(*handle)) {
+ fprintf(stderr, "failed reading file handle #%d from '%s'\n", i, infile);
+ return EXIT_FAILURE;
+ }
+ } else {
+ handle[i].fh.handle_bytes = MAX_HANDLE_SZ;
+ ret = name_to_handle_at(AT_FDCWD, fname, &handle[i].fh, &mount_id, 0);
+ if (ret < 0) {
+ strcat(fname, ": name_to_handle");
+ perror(fname);
+ return EXIT_FAILURE;
+ }
}
if (keepopen) {
/* Open without close to keep unlinked files around */
return EXIT_FAILURE;
}
}
+ if (out_fd) {
+ ret = write(out_fd, (char *)&handle[i], sizeof(*handle));
+ if (ret < sizeof(*handle)) {
+ fprintf(stderr, "failed writing file handle #%d to '%s'\n", i, outfile);
+ return EXIT_FAILURE;
+ }
+ }
}
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;
+ if (in_fd) {
+ ret = read(in_fd, (char *)&dir_handle, sizeof(*handle));
+ if (ret < sizeof(*handle)) {
+ fprintf(stderr, "failed reading dir file handle from '%s'\n", infile);
+ return EXIT_FAILURE;
+ }
+ } else {
+ 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;
+ }
+ }
+ if (out_fd) {
+ ret = write(out_fd, (char *)&dir_handle, sizeof(*handle));
+ if (ret < sizeof(*handle)) {
+ fprintf(stderr, "failed writing dir file handle to '%s'\n", outfile);
+ return EXIT_FAILURE;
+ }
}
}
close(fd);
}
- /* after creating test set only check that fs supports exportfs */
- if (create)
+ /* If creating test set or saving files handles, we are done */
+ if (create || out_fd)
return EXIT_SUCCESS;
/* hardlink the files */
projects / xfstests-dev.git / blobdiff