fs-tests: integck: re-structure file_write a little

This is just a preparation - re-structure 'file_write()' to make one "success"
return point - we'll add synchronization stuff there. Also, while on it, make
it delete the file errored in truncation, not only in write. Also, move
the fsync() call to this function because it is common to all write paths.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

1 files changed, 63 insertions, 55 deletions

diff --git a/tests/fs-tests/integrity/integck.c b/tests/fs-tests/integrity/integck.c
index a35b7ae..5afc1e9 100644
--- a/tests/fs-tests/integrity/integck.c
+++ b/tests/fs-tests/integrity/integck.c
@@ -1189,54 +1189,76 @@ out_error:
  */
 static int file_write(struct file_info *file, int fd)
 {
-	off_t offset;
-	size_t size;
-	ssize_t actual;
-	unsigned int seed;
-	int ret, truncate = 0;
+	int ret;
 
-	/*
-	 * 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);
+	    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.
+		 */
+		ret = file_mmap_write(file);
+	} else {
+		int truncate = 0;
+		off_t offset;
+		size_t size;
+		ssize_t actual;
+		unsigned int seed;
+
+		get_offset_and_size(file, &offset, &size);
+		seed = random_no(MAX_RANDOM_SEED);
+		actual = file_write_data(file, fd, offset, size, seed);
+		if (actual < 0)
+			return -1;
 
-	get_offset_and_size(file, &offset, &size);
-	seed = random_no(MAX_RANDOM_SEED);
-	actual = file_write_data(file, fd, offset, size, seed);
-	if (actual < 0)
-		return -1;
+		if (actual != 0)
+			file_write_info(file, fd, offset, actual, seed);
 
-	if (offset + actual <= file->length && shrink)
-		/* 1 time in 100, when shrinking truncate after the write */
-		if (random_no(100) == 0)
-			truncate = 1;
+		if (offset + actual <= file->length && shrink) {
+			/*
+			 * 1 time in 100, when shrinking truncate after the
+			 * write.
+			 */
+			if (random_no(100) == 0)
+				truncate = 1;
+		}
 
-	if (actual != 0)
-		file_write_info(file, fd, offset, actual, seed);
+		if (truncate) {
+			size_t new_length = offset + actual;
 
-	/* Delete errored files */
-	if (!fsinfo.nospc_size_ok && file->no_space_error)
-		return file_delete(file);
+			ret = file_ftruncate(file, fd, new_length);
+			if (ret == -1)
+				return -1;
+			if (!ret)
+				file_truncate_info(file, fd, new_length);
+		}
 
-	if (truncate) {
-		size_t new_length = offset + actual;
+		/* Delete errored files */
+		if (!fsinfo.nospc_size_ok && file->no_space_error)
+			return file_delete(file);
+	}
 
-		ret = file_ftruncate(file, fd, new_length);
-		if (ret == -1)
-			return -1;
-		if (!ret)
-			file_truncate_info(file, fd, new_length);
+	/* Sync sometimes */
+	if (random_no(1000) >= 999) {
+		if (random_no(100) >= 50) {
+			ret = fsync(fd);
+			if (ret)
+				pcv("fsync failed for %s", file->links->name);
+		} else {
+			ret = fdatasync(fd);
+			if (ret)
+				pcv("fdatasync failed for %s",
+				    file->links->name);
+		}
 	}
 
 	return 0;
@@ -2190,22 +2212,8 @@ static int operate_on_open_file(struct fd_info *fdi)
 		file_close(fdi);
 	else if (shrink && r < 121 && fdi->file->link_count)
 		ret = file_delete(fdi->file);
-	else {
+	else
 		ret = file_write(fdi->file, fdi->fd);
-		if (!ret && r >= 999) {
-			if (random_no(100) >= 50) {
-				ret = fsync(fdi->fd);
-				if (ret)
-					pcv("fsync failed for %s",
-					    fdi->file->links->name);
-			} else {
-				ret = fdatasync(fdi->fd);
-				if (ret)
-					pcv("fdatasync failed for %s",
-					    fdi->file->links->name);
-			}
-		}
-	}
 
 	return ret;
 }