generic: test invalid swap file activation
Swap files cannot have holes, and they must at least two pages.
swapon(8) and mkswap(8) have stricter restrictions, so add versions
of those commands without any restrictions.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
diff --git a/.gitignore b/.gitignore
index 53029e2..efc73a7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -92,6 +92,7 @@
/src/lstat64
/src/makeextents
/src/metaperf
+/src/mkswap
/src/mmapcat
/src/multi_open_unlink
/src/nametest
@@ -111,6 +112,7 @@
/src/seek_sanity_test
/src/stale_handle
/src/stat_test
+/src/swapon
/src/t_access_root
/src/t_dir_offset
/src/t_dir_offset2
diff --git a/src/Makefile b/src/Makefile
index c42d3bb..01fe99e 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -26,7 +26,7 @@
renameat2 t_getcwd e4compact test-nextquota punch-alternating \
attr-list-by-handle-cursor-test listxattr dio-interleaved t_dir_type \
dio-invalidate-cache stat_test t_encrypted_d_revalidate \
- attr_replace_test
+ attr_replace_test swapon mkswap
SUBDIRS = log-writes perf
diff --git a/src/mkswap.c b/src/mkswap.c
new file mode 100644
index 0000000..d0bce2b
--- /dev/null
+++ b/src/mkswap.c
@@ -0,0 +1,83 @@
+/* mkswap(8) without any sanity checks */
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+struct swap_header {
+ char bootbits[1024];
+ uint32_t version;
+ uint32_t last_page;
+ uint32_t nr_badpages;
+ unsigned char sws_uuid[16];
+ unsigned char sws_volume[16];
+ uint32_t padding[117];
+ uint32_t badpages[1];
+};
+
+int main(int argc, char **argv)
+{
+ struct swap_header *hdr;
+ FILE *file;
+ struct stat st;
+ long page_size;
+ int ret;
+
+ if (argc != 2) {
+ fprintf(stderr, "usage: %s PATH\n", argv[0]);
+ return EXIT_FAILURE;
+ }
+
+ page_size = sysconf(_SC_PAGESIZE);
+ if (page_size == -1) {
+ perror("sysconf");
+ return EXIT_FAILURE;
+ }
+
+ hdr = calloc(1, page_size);
+ if (!hdr) {
+ perror("calloc");
+ return EXIT_FAILURE;
+ }
+
+ file = fopen(argv[1], "r+");
+ if (!file) {
+ perror("fopen");
+ free(hdr);
+ return EXIT_FAILURE;
+ }
+
+ ret = fstat(fileno(file), &st);
+ if (ret) {
+ perror("fstat");
+ free(hdr);
+ fclose(file);
+ return EXIT_FAILURE;
+ }
+
+ hdr->version = 1;
+ hdr->last_page = st.st_size / page_size - 1;
+ memset(&hdr->sws_uuid, 0x99, sizeof(hdr->sws_uuid));
+ memcpy((char *)hdr + page_size - 10, "SWAPSPACE2", 10);
+
+ if (fwrite(hdr, page_size, 1, file) != 1) {
+ perror("fwrite");
+ free(hdr);
+ fclose(file);
+ return EXIT_FAILURE;
+ }
+
+ if (fclose(file) == EOF) {
+ perror("fwrite");
+ free(hdr);
+ return EXIT_FAILURE;
+ }
+
+ free(hdr);
+
+ return EXIT_SUCCESS;
+}
diff --git a/src/swapon.c b/src/swapon.c
new file mode 100644
index 0000000..0cb7108
--- /dev/null
+++ b/src/swapon.c
@@ -0,0 +1,24 @@
+/* swapon(8) without any sanity checks; simply calls swapon(2) directly. */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/swap.h>
+
+int main(int argc, char **argv)
+{
+ int ret;
+
+ if (argc != 2) {
+ fprintf(stderr, "usage: %s PATH\n", argv[0]);
+ return EXIT_FAILURE;
+ }
+
+ ret = swapon(argv[1], 0);
+ if (ret) {
+ perror("swapon");
+ return EXIT_FAILURE;
+ }
+
+ return EXIT_SUCCESS;
+}
diff --git a/tests/generic/495 b/tests/generic/495
new file mode 100755
index 0000000..da19601
--- /dev/null
+++ b/tests/generic/495
@@ -0,0 +1,77 @@
+#! /bin/bash
+# FS QA Test 495
+#
+# Test invalid swap files.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2018 Facebook. All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+#-----------------------------------------------------------------------
+#
+
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1 # failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+ cd /
+ rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# remove previous $seqres.full before test
+rm -f $seqres.full
+
+_supported_fs generic
+_supported_os Linux
+_require_scratch_swapfile
+_require_test_program mkswap
+_require_test_program swapon
+
+_scratch_mkfs >> $seqres.full 2>&1
+_scratch_mount
+
+echo "File with holes"
+# We can't use _format_swapfile because we're using our custom mkswap and
+# swapon.
+touch "$SCRATCH_MNT/swap"
+$CHATTR_PROG +C "$SCRATCH_MNT/swap" >> $seqres.full 2>&1
+chmod 0600 "$SCRATCH_MNT/swap"
+$XFS_IO_PROG -c "truncate $(($(get_page_size) * 10))" "$SCRATCH_MNT/swap"
+"$here/src/mkswap" "$SCRATCH_MNT/swap"
+"$here/src/swapon" "$SCRATCH_MNT/swap"
+swapoff "$SCRATCH_MNT/swap" >/dev/null 2>&1
+
+echo "Empty swap file (only swap header)"
+rm -f "$SCRATCH_MNT/swap"
+touch "$SCRATCH_MNT/swap"
+$CHATTR_PROG +C "$SCRATCH_MNT/swap" >> $seqres.full 2>&1
+chmod 0600 "$SCRATCH_MNT/swap"
+_pwrite_byte 0x61 0 $(get_page_size) "$SCRATCH_MNT/swap" >> $seqres.full
+"$here/src/mkswap" "$SCRATCH_MNT/swap"
+"$here/src/swapon" "$SCRATCH_MNT/swap"
+swapoff "$SCRATCH_MNT/swap" >/dev/null 2>&1
+
+status=0
+exit
diff --git a/tests/generic/495.out b/tests/generic/495.out
new file mode 100644
index 0000000..a7e3b72
--- /dev/null
+++ b/tests/generic/495.out
@@ -0,0 +1,5 @@
+QA output created by 495
+File with holes
+swapon: Invalid argument
+Empty swap file (only swap header)
+swapon: Invalid argument
diff --git a/tests/generic/group b/tests/generic/group
index dbde7ec..752ee35 100644
--- a/tests/generic/group
+++ b/tests/generic/group
@@ -496,3 +496,4 @@
492 auto quick
493 auto quick swap
494 auto quick swap
+495 auto quick swap
