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open_by_handle: test file handles of open files

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usage: open_by_handle -dk <test_dir> [N]

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.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
This commit is contained in:
Amir Goldstein
2017-11-02 12:15:37 +02:00
committed by Eryu Guan
parent fcaeb02ed1
commit 48a67c3543
1 changed files with 31 additions and 10 deletions
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src/open_by_handle.c
+31 -10
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@@ -27,7 +27,7 @@
/*
usage: open_by_handle [-cludmrwap] <test_dir> [num_files]
usage: open_by_handle [-cludmrwapk] <test_dir> [num_files]
Examples:
@@ -55,12 +55,18 @@ Examples:
open_by_handle -dp <test_dir> [N]
5. Get file handles for existing test set, rename all test files,
5. 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,
drop caches, try to open all files by handle (should work):
open_by_handle -m <test_dir> [N]
6. Get file handles for existing test set, hardlink all test files,
7. 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):
@@ -97,10 +103,11 @@ struct handle {
void usage(void)
{
fprintf(stderr, "usage: open_by_handle [-cludmrwap] <test_dir> [num_files]\n");
fprintf(stderr, "usage: open_by_handle [-cludmrwapk] <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");
@@ -127,11 +134,12 @@ int main(int argc, char **argv)
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)
usage();
while ((c = getopt(argc, argv, "cludmrwap")) != -1) {
while ((c = getopt(argc, argv, "cludmrwapk")) != -1) {
switch (c) {
case 'c':
create = 1;
@@ -165,6 +173,9 @@ int main(int argc, char **argv)
case 'p':
parent = 1;
break;
case 'k':
keepopen = 1;
break;
default:
fprintf(stderr, "illegal option '%s'\n", argv[optind]);
case 'h':
@@ -213,7 +224,7 @@ int main(int argc, char **argv)
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;
}
@@ -240,6 +251,15 @@ int main(int argc, char **argv)
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 (parent) {
@@ -350,7 +370,7 @@ int main(int argc, char **argv)
for (i=0; i < numfiles; i++) {
errno = 0;
fd = open_by_handle_at(mount_fd, &handle[i].fh, wrafter ? O_RDWR : O_RDONLY);
if (nlink && fd >= 0) {
if ((nlink || keepopen) && fd >= 0) {
if (rd) {
char buf[4] = {0};
int size = read(fd, buf, 4);
@@ -370,7 +390,7 @@ int main(int argc, char **argv)
}
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);
@@ -378,9 +398,10 @@ int main(int argc, char **argv)
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++;
}