From 90c021417d2a16efb5dd6968b2e0c056b5a897fc Mon Sep 17 00:00:00 2001
From: Elena Gryaznova <elena.gryaznova@hpe.com>
Date: Sun, 18 Aug 2024 17:08:55 +0300
Subject: [PATCH] LU-18075 tests: fiemap test for sparse files

New "Check fiemap for sparse files" test shows the
memory corruption without the following fix:
  LU-17110 llite: fix slab corruption with fm_extent_count=0

Test-Parameters: trivial testlist=sanity env=ONLY=44f,ONLY_REPEAT=10,NUMFILES_44f=20
Signed-off-by: Elena Gryaznova <elena.gryaznova@hpe.com>
Signed-off-by: Vladimir Saveliev <vladimir.saveliev@hpe.com>
HPE-bug-id: LUS-11952,LUS-12040
Reviewed-by: Andrew Perepechko <andrew.perepechko@hpe.com>
Reviewed-by: Vladimir Saveliev <vladimir.saveliev@hpe.com>
Change-Id: I22034c7937366d9ea4b2b3f02fd7085d7ebe7e10
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/55883
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
---
 lustre/tests/multiop.c | 37 +++++++++++++++++++++++++++++++++++++
 lustre/tests/sanity.sh | 16 ++++++++++++++++
 2 files changed, 53 insertions(+)

diff --git a/lustre/tests/multiop.c b/lustre/tests/multiop.c
index 69da675..82b91be 100644
--- a/lustre/tests/multiop.c
+++ b/lustre/tests/multiop.c
@@ -82,6 +82,7 @@ char usage[] =
 "	 G gid get grouplock\n"
 "	 g gid put grouplock\n"
 "	 H[num] create HSM released file with num stripes\n"
+"	 I  fiemap\n"
 "	 K  link path to filename\n"
 "	 L  link\n"
 "	 l  symlink filename to path\n"
@@ -235,6 +236,39 @@ out_closedir:
 	return rc;
 }
 
+static int do_fiemap(int fd)
+{
+	struct fiemap *pf;
+	int extents;
+	int save_errno;
+	int i;
+
+	extents = 0;
+	for (i = 0; i < 2; i++) {
+		if ((pf = malloc(sizeof(struct fiemap) +
+			extents * sizeof(struct fiemap_extent))) == NULL) {
+			perror("malloc failed");
+			exit(1);
+		}
+		pf->fm_start = 0;
+		pf->fm_length = FIEMAP_MAX_OFFSET;
+		pf->fm_flags = FIEMAP_FLAG_SYNC;
+		pf->fm_extent_count = extents;
+
+		if (ioctl(fd, FS_IOC_FIEMAP, pf) < 0) {
+			save_errno = errno;
+			if (i == 0)
+				perror("probe fiemap failed");
+			else
+				perror("fiemap failed");
+			exit(save_errno);
+		}
+		extents = pf->fm_mapped_extents;
+		free(pf);
+	}
+	return 0;
+}
+
 #define POP_ARG() (pop_arg(argc, argv))
 
 int main(int argc, char **argv)
@@ -478,6 +512,9 @@ int main(int argc, char **argv)
 			}
 			rc = fd;
 			break;
+		case 'I':
+			do_fiemap(fd);
+			break;
 		case 'j':
 			if (flock(fd, LOCK_EX) == -1)
 				errx(-1, "flock()");
diff --git a/lustre/tests/sanity.sh b/lustre/tests/sanity.sh
index 871c575..31dd8dc 100755
--- a/lustre/tests/sanity.sh
+++ b/lustre/tests/sanity.sh
@@ -6036,6 +6036,22 @@ test_44e() {
 }
 run_test 44e "write and read maximal stripes"
 
+test_44f() {
+	[ "$FSTYPE" != "zfs" ] ||
+		skip "ORI-366/LU-1941: FIEMAP unimplemented on ZFS"
+
+	local i
+	# required space: NUMFILES_44f * 20Mb
+	local NUMFILES_44f=${NUMFILES_44f:-50}
+
+	for (( i=0; i<NUMFILES_44f; i++ )); do
+		multiop $DIR/$tfile-$i \
+			Ow10485760Z10485760w10485760Ic ||
+			error "multiop failed"
+	done
+}
+run_test 44f "Check fiemap for sparse files"
+
 dirty_osc_total() {
 	tot=0
 	for d in `lctl get_param -n ${OSC}.*.cur_dirty_bytes`; do
-- 
1.8.3.1