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-rw-r--r--tests/fs-tests/integrity/integck.c20
1 files changed, 17 insertions, 3 deletions
diff --git a/tests/fs-tests/integrity/integck.c b/tests/fs-tests/integrity/integck.c
index f1a2f84..bbbc7cb 100644
--- a/tests/fs-tests/integrity/integck.c
+++ b/tests/fs-tests/integrity/integck.c
@@ -213,7 +213,6 @@ static int full = 0; /* Flag that the file system is full */
static uint64_t operation_count = 0; /* Number of operations used to fill
up the file system */
static unsigned int check_run_no;
-
static unsigned int random_seed;
/*
@@ -1110,11 +1109,14 @@ static int file_mmap_write(struct file_info *file)
uint64_t free_space;
int fd;
+ assert(!args.power_cut_mode);
+
if (!file->links)
return 0;
get_fs_space(NULL, &free_space);
if (!free_space)
return 0;
+
/* Randomly pick a written area of the file */
if (!w)
return 0;
@@ -1191,8 +1193,20 @@ static int file_write(struct file_info *file, int fd)
unsigned int seed;
int ret, truncate = 0;
- if (fsinfo.can_mmap && !full && file->link_count &&
- random_no(100) == 1)
+ /*
+ * Do not do 'mmap()' operations if:
+ * 1. we are in power cut testing mode, because an emulated power cut
+ * failure may cause SIGBUS when we are writing to the 'mmap()'ed
+ * area, and SIGBUS is not easy to ignore.
+ * 2. When the file-system is full, because again, writing to the
+ * 'mmap()'ed area may cause SIGBUS when the space allocation fails.
+ * This is not enough to guarantee we never get SIGBUS, though. For
+ * example, if we write a lot to a hole, this might require a lot of
+ * additional space, and we may fail here. But I do not know why we
+ * never observed this, probably this is just very unlikely.
+ */
+ if (!args.power_cut_mode && fsinfo.can_mmap && !full &&
+ file->link_count && random_no(100) == 1)
return file_mmap_write(file);
get_offset_and_size(file, &offset, &size);