/*
-usage: open_by_handle [-c|-l|-u|-d] <test_dir> [num_files]
+usage: open_by_handle [-cludmrwapkh] [<-i|-o> <handles_file>] <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
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, unlink all test files,
- drop caches, try to open all files by handle and expect ESTALE:
+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 -d <test_dir> [N]
+ 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, hardlink all test files,
+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]
+
+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]
+
+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]
+
+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]
+
+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):
#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 [-c|-l|-u|-d] <test_dir> [num_files]\n");
+ fprintf(stderr, "usage: open_by_handle [-cludmrwapkh] [<-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 -k <test_dir> [N] - get file handles of files that are kept open, drop caches and try to open by handle\n");
+ fprintf(stderr, "open_by_handle -w <test_dir> [N] - write data to test files before open by handle\n");
+ fprintf(stderr, "open_by_handle -r <test_dir> [N] - read data from test files after open by handle and verify written data\n");
+ fprintf(stderr, "open_by_handle -a <test_dir> [N] - write data to test files after 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");
+ 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);
}
{
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;
+ char *infile = NULL, *outfile = NULL;
+ int in_fd = 0, out_fd = 0;
int numfiles = 1;
- int create = 0, delete = 0, nlink = 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, "clud")) != -1) {
+ while ((c = getopt(argc, argv, "cludmrwapkhi:o:")) != -1) {
switch (c) {
case 'c':
create = 1;
break;
+ case 'w':
+ /* Write data before open_by_handle_at() */
+ wr = 1;
+ break;
+ case 'r':
+ /* Read data after open_by_handle_at() */
+ rd = 1;
+ break;
+ case 'a':
+ /* Write data after open_by_handle_at() */
+ wrafter = 1;
+ break;
case 'l':
nlink = 2;
break;
delete = 1;
nlink = 0;
break;
+ case 'm':
+ move = 1;
+ break;
+ case 'p':
+ parent = 1;
+ break;
+ 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();
}
- mount_fd = open(test_dir, O_RDONLY|O_DIRECTORY);
+ /*
+ * 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);
+ 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;
}
sprintf(fname2, "%s/link%06d", test_dir, i);
fd = open(fname, O_RDWR | O_CREAT | O_TRUNC, 0644);
if (fd < 0) {
- strcat(fname, ": open");
+ strcat(fname, ": open(O_CREAT)");
perror(fname);
return EXIT_FAILURE;
}
/* 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");
+ 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 */
+ fd = open(fname, O_RDONLY);
+ if (fd < 0) {
+ strcat(fname, ": open(O_RDONLY)");
+ perror(fname);
+ 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) {
+ 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;
+ }
+ }
+ }
+
+ /* write data to files */
+ for (i=0; wr && i < numfiles; i++) {
+ sprintf(fname, "%s/file%06d", test_dir, i);
+ fd = open(fname, O_WRONLY, 0644);
+ if (fd < 0) {
+ strcat(fname, ": open");
perror(fname);
return EXIT_FAILURE;
}
+ if (write(fd, "aaaa", 4) != 4) {
+ strcat(fname, ": write before");
+ perror(fname);
+ 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 */
}
}
+ /* rename the files */
+ for (i=0; move && i < numfiles; i++) {
+ sprintf(fname, "%s/file%06d", test_dir, i);
+ sprintf(fname2, "%s/link%06d", test_dir, i);
+ ret = rename(fname, fname2);
+ if (ret < 0) {
+ strcat(fname2, ": rename");
+ perror(fname2);
+ return EXIT_FAILURE;
+ }
+ }
+
/* unlink the files */
for (i=0; delete && i < numfiles; i++) {
sprintf(fname, "%s/file%06d", test_dir, i);
}
}
+ 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();
*/
for (i=0; i < numfiles; i++) {
errno = 0;
- fd = open_by_handle_at(mount_fd, &handle[i].fh, O_RDWR);
- if (nlink && fd >= 0) {
+ fd = open_by_handle_at(mount_fd, &handle[i].fh, wrafter ? O_RDWR : O_RDONLY);
+ if ((nlink || keepopen) && fd >= 0) {
+ if (rd) {
+ char buf[4] = {0};
+ int size = read(fd, buf, 4);
+ if (size < 0) {
+ strcat(fname, ": read");
+ perror(fname);
+ return EXIT_FAILURE;
+ }
+ if (size < 4 || memcmp(buf, "aaaa", 4)) {
+ printf("open_by_handle(%s) returned stale data '%.*s'!\n", fname, size, buf);
+ }
+ }
+ if (wrafter && write(fd, "aaaa", 4) != 4) {
+ strcat(fname, ": write after");
+ perror(fname);
+ return EXIT_FAILURE;
+ }
close(fd);
continue;
- } else if (!nlink && fd < 0 && (errno == ENOENT || errno == ESTALE)) {
+ } else if (!nlink && !keepopen && fd < 0 && (errno == ENOENT || errno == ESTALE)) {
continue;
}
sprintf(fname, "%s/file%06d", test_dir, i);
printf("open_by_handle(%s) opened an unlinked file!\n", fname);
close(fd);
} else {
- printf("open_by_handle(%s) returned %d incorrectly on %s file!\n",
+ printf("open_by_handle(%s) returned %d incorrectly on %s%s file!\n",
fname, errno,
- nlink ? "a linked" : "an unlinked");
+ nlink ? "a linked" : "an unlinked",
+ keepopen ? " open" : "");
}
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 if (rd) {
+ /*
+ * 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;
projects / xfstests-dev.git / blobdiff