fio: replace malloc+memset with calloc

Clean up the code base by replacing malloc+memset with calloc. This
patch was generated from the Coccinelle script below.

The script below is inspired by similar scripts used elsewhere:
https://lore.kernel.org/linux-btrfs/cover.1443546000.git.silvio.fricke@gmail.com/
https://github.com/coccinelle/coccinellery/blob/master/simple_kzalloc/simple_kzalloc1.cocci

@@
expression x,y;
statement s;
type T;
@@

-x = malloc(y * sizeof(T));
+x = calloc(y, sizeof(T));
(
if (!x) s
|
if (x == NULL) s
|
)
-memset(x, 0, y * sizeof(T));

@@
expression x,y,z;
statement s;
@@

-x = malloc(y * sizeof(z));
+x = calloc(y, sizeof(z));
(
if (!x) s
|
if (x == NULL) s
|
)
-memset(x, 0, y * sizeof(z));

@@
expression e,x;
statement s;
@@

-x = malloc(e);
+x = calloc(1, e);
(
if (!x) s
|
if (x == NULL) s
|
)
-memset(x, 0, e);

Signed-off-by: Vincent Fu <vincent.fu@samsung.com>

Author: vincentkfu

client.c

@@ -369,8 +369,7 @@ static struct fio_client *get_new_client(void)
 {
 	struct fio_client *client;
 
-	client = malloc(sizeof(*client));
-	memset(client, 0, sizeof(*client));
+	client = calloc(1, sizeof(*client));
 
 	INIT_FLIST_HEAD(&client->list);
 	INIT_FLIST_HEAD(&client->hash_list);
@@ -793,8 +792,7 @@ static int __fio_client_send_remote_ini(struct fio_client *client,
 	dprint(FD_NET, "send remote ini %s to %s\n", filename, client->hostname);
 
 	p_size = sizeof(*pdu) + strlen(filename) + 1;
-	pdu = malloc(p_size);
-	memset(pdu, 0, p_size);
+	pdu = calloc(1, p_size);
 	pdu->name_len = strlen(filename);
 	strcpy((char *) pdu->file, filename);
 	pdu->client_type = cpu_to_le16((uint16_t) client->type);

engines/e4defrag.c

@@ -77,12 +77,11 @@ static int fio_e4defrag_init(struct thread_data *td)
 		return 1;
 	}
 
-	ed = malloc(sizeof(*ed));
+	ed = calloc(1, sizeof(*ed));
 	if (!ed) {
 		td_verror(td, ENOMEM, "io_queue_init");
 		return 1;
 	}
-	memset(ed, 0 ,sizeof(*ed));
 
 	if (td->o.directory)
 		len = sprintf(donor_name, "%s/", td->o.directory);

engines/io_uring.c

@@ -800,11 +800,10 @@ static void fio_ioring_probe(struct thread_data *td)
 	/* default to off, as that's always safe */
 	o->nonvectored = 0;
 
-	p = malloc(sizeof(*p) + 256 * sizeof(struct io_uring_probe_op));
+	p = calloc(1, sizeof(*p) + 256 * sizeof(struct io_uring_probe_op));
 	if (!p)
 		return;
 
-	memset(p, 0, sizeof(*p) + 256 * sizeof(struct io_uring_probe_op));
 	ret = syscall(__NR_io_uring_register, ld->ring_fd,
 			IORING_REGISTER_PROBE, p, 256);
 	if (ret < 0)

engines/libhdfs.c

@@ -315,8 +315,7 @@ static int fio_hdfsio_setup(struct thread_data *td)
 	uint64_t file_size, total_file_size;
 
 	if (!td->io_ops_data) {
-		hd = malloc(sizeof(*hd));
-		memset(hd, 0, sizeof(*hd));
+		hd = calloc(1, sizeof(*hd));
 
 		hd->curr_file_id = -1;
 

engines/libiscsi.c

@@ -68,8 +68,7 @@ static int fio_iscsi_setup_lun(struct iscsi_info *iscsi_info,
 	struct scsi_readcapacity16	*rc16	    = NULL;
 	int				 ret	    = 0;
 
-	iscsi_lun = malloc(sizeof(struct iscsi_lun));
-	memset(iscsi_lun, 0, sizeof(struct iscsi_lun));
+	iscsi_lun = calloc(1, sizeof(struct iscsi_lun));
 
 	iscsi_lun->iscsi_info = iscsi_info;
 

engines/net.c

@@ -1370,9 +1370,7 @@ static int fio_netio_setup(struct thread_data *td)
 	}
 
 	if (!td->io_ops_data) {
-		nd = malloc(sizeof(*nd));
-
-		memset(nd, 0, sizeof(*nd));
+		nd = calloc(1, sizeof(*nd));
 		nd->listenfd = -1;
 		nd->pipes[0] = nd->pipes[1] = -1;
 		td->io_ops_data = nd;

engines/nfs.c

@@ -224,8 +224,7 @@ static int do_mount(struct thread_data *td, const char *url)
 		return -1;
 	}
 
-	options->events = malloc(event_size);
-	memset(options->events, 0, event_size);
+	options->events = calloc(1, event_size);
 
 	options->prev_requested_event_index = -1;
 	options->queue_depth = td->o.iodepth;
@@ -278,8 +277,7 @@ static int fio_libnfs_open(struct thread_data *td, struct fio_file *f)
 			options->nfs_url, ret, nfs_get_error(options->context));
 		return ret;
 	}
-	nfs_data = malloc(sizeof(struct nfs_data));
-	memset(nfs_data, 0, sizeof(struct nfs_data));
+	nfs_data = calloc(1, sizeof(struct nfs_data));
 	nfs_data->options = options;
 
 	if (td->o.td_ddir == TD_DDIR_WRITE)

engines/null.c

@@ -112,8 +112,7 @@ static struct null_data *null_init(struct thread_data *td)
 	memset(nd, 0, sizeof(*nd));
 
 	if (td->o.iodepth != 1) {
-		nd->io_us = malloc(td->o.iodepth * sizeof(struct io_u *));
-		memset(nd->io_us, 0, td->o.iodepth * sizeof(struct io_u *));
+		nd->io_us = calloc(td->o.iodepth, sizeof(struct io_u *));
 		td->io_ops->flags |= FIO_ASYNCIO_SETS_ISSUE_TIME;
 	} else
 		td->io_ops->flags |= FIO_SYNCIO;

engines/posixaio.c

@@ -198,11 +198,8 @@ static void fio_posixaio_cleanup(struct thread_data *td)
 static int fio_posixaio_init(struct thread_data *td)
 {
 	struct posixaio_data *pd;
-	pd = malloc(sizeof(*pd));
-
-	memset(pd, 0, sizeof(*pd));
-	pd->aio_events = malloc(td->o.iodepth * sizeof(struct io_u *));
-	memset(pd->aio_events, 0, td->o.iodepth * sizeof(struct io_u *));
+	pd = calloc(1, sizeof(*pd));
+	pd->aio_events = calloc(td->o.iodepth, sizeof(struct io_u *));
 
 	td->io_ops_data = pd;
 	return 0;

engines/rdma.c

@@ -1296,23 +1296,18 @@ static int fio_rdmaio_init(struct thread_data *td)
 
 	if ((rd->rdma_protocol == FIO_RDMA_MEM_WRITE) ||
 	    (rd->rdma_protocol == FIO_RDMA_MEM_READ)) {
-		rd->rmt_us =
-			malloc(FIO_RDMA_MAX_IO_DEPTH * sizeof(struct remote_u));
-		memset(rd->rmt_us, 0,
-			FIO_RDMA_MAX_IO_DEPTH * sizeof(struct remote_u));
+		rd->rmt_us = calloc(FIO_RDMA_MAX_IO_DEPTH,
+				    sizeof(struct remote_u));
 		rd->rmt_nr = 0;
 	}
 
-	rd->io_us_queued = malloc(td->o.iodepth * sizeof(struct io_u *));
-	memset(rd->io_us_queued, 0, td->o.iodepth * sizeof(struct io_u *));
+	rd->io_us_queued = calloc(td->o.iodepth, sizeof(struct io_u *));
 	rd->io_u_queued_nr = 0;
 
-	rd->io_us_flight = malloc(td->o.iodepth * sizeof(struct io_u *));
-	memset(rd->io_us_flight, 0, td->o.iodepth * sizeof(struct io_u *));
+	rd->io_us_flight = calloc(td->o.iodepth, sizeof(struct io_u *));
 	rd->io_u_flight_nr = 0;
 
-	rd->io_us_completed = malloc(td->o.iodepth * sizeof(struct io_u *));
-	memset(rd->io_us_completed, 0, td->o.iodepth * sizeof(struct io_u *));
+	rd->io_us_completed = calloc(td->o.iodepth, sizeof(struct io_u *));
 	rd->io_u_completed_nr = 0;
 
 	if (td_read(td)) {	/* READ as the server */
@@ -1339,8 +1334,7 @@ static int fio_rdmaio_post_init(struct thread_data *td)
 	for (i = 0; i < td->io_u_freelist.nr; i++) {
 		struct io_u *io_u = td->io_u_freelist.io_us[i];
 
-		io_u->engine_data = malloc(sizeof(struct rdma_io_u_data));
-		memset(io_u->engine_data, 0, sizeof(struct rdma_io_u_data));
+		io_u->engine_data = calloc(1, sizeof(struct rdma_io_u_data));
 		((struct rdma_io_u_data *)io_u->engine_data)->wr_id = i;
 
 		io_u->mr = ibv_reg_mr(rd->pd, io_u->buf, max_bs,
@@ -1386,9 +1380,7 @@ static int fio_rdmaio_setup(struct thread_data *td)
 	}
 
 	if (!td->io_ops_data) {
-		rd = malloc(sizeof(*rd));
-
-		memset(rd, 0, sizeof(*rd));
+		rd = calloc(1, sizeof(*rd));
 		init_rand_seed(&rd->rand_state, (unsigned int) GOLDEN_RATIO_64, 0);
 		td->io_ops_data = rd;
 	}

engines/solarisaio.c

@@ -187,8 +187,7 @@ static int fio_solarisaio_init(struct thread_data *td)
 {
 	unsigned int max_depth;
 	struct solarisaio_data *sd;
-	sd = malloc(sizeof(*sd));
-	memset(sd, 0, sizeof(*sd));
+	sd = calloc(1, sizeof(*sd));
 
 	max_depth = td->o.iodepth;
 	if (max_depth > MAXASYNCHIO) {
@@ -197,8 +196,7 @@ static int fio_solarisaio_init(struct thread_data *td)
 							max_depth);
 	}
 
-	sd->aio_events = malloc(max_depth * sizeof(struct io_u *));
-	memset(sd->aio_events, 0, max_depth * sizeof(struct io_u *));
+	sd->aio_events = calloc(max_depth, sizeof(struct io_u *));
 	sd->max_depth = max_depth;
 
 #ifdef USE_SIGNAL_COMPLETIONS

engines/sync.c

@@ -402,8 +402,7 @@ static int fio_vsyncio_init(struct thread_data *td)
 {
 	struct syncio_data *sd;
 
-	sd = malloc(sizeof(*sd));
-	memset(sd, 0, sizeof(*sd));
+	sd = calloc(1, sizeof(*sd));
 	sd->last_offset = -1ULL;
 	sd->iovecs = malloc(td->o.iodepth * sizeof(struct iovec));
 	sd->io_us = malloc(td->o.iodepth * sizeof(struct io_u *));

eta.c

@@ -409,8 +409,7 @@ bool calc_thread_status(struct jobs_eta *je, int force)
 	if (!ddir_rw_sum(disp_io_bytes))
 		fill_start_time(&disp_prev_time);
 
-	eta_secs = malloc(thread_number * sizeof(uint64_t));
-	memset(eta_secs, 0, thread_number * sizeof(uint64_t));
+	eta_secs = calloc(thread_number, sizeof(uint64_t));
 
 	je->elapsed_sec = (mtime_since_genesis() + 999) / 1000;
 
@@ -692,10 +691,9 @@ struct jobs_eta *get_jobs_eta(bool force, size_t *size)
 		return NULL;
 
 	*size = sizeof(*je) + THREAD_RUNSTR_SZ + 8;
-	je = malloc(*size);
+	je = calloc(1, *size);
 	if (!je)
 		return NULL;
-	memset(je, 0, *size);
 
 	if (!calc_thread_status(je, force)) {
 		free(je);

filesetup.c

@@ -303,13 +303,12 @@ static bool pre_read_file(struct thread_data *td, struct fio_file *f)
 	if (bs > left)
 		bs = left;
 
-	b = malloc(bs);
+	b = calloc(1, bs);
 	if (!b) {
 		td_verror(td, errno, "malloc");
 		ret = false;
 		goto error;
 	}
-	memset(b, 0, bs);
 
 	if (lseek(f->fd, f->file_offset, SEEK_SET) < 0) {
 		td_verror(td, errno, "lseek");

gfio.c

@@ -730,8 +730,7 @@ static struct gui_entry *alloc_new_gui_entry(struct gui *ui)
 {
 	struct gui_entry *ge;
 
-	ge = malloc(sizeof(*ge));
-	memset(ge, 0, sizeof(*ge));
+	ge = calloc(1, sizeof(*ge));
 	ge->state = GE_STATE_NEW;
 	ge->ui = ui;
 	return ge;

graph.c

@@ -713,8 +713,7 @@ static void graph_label_add_value(struct graph_label *i, void *value,
 	struct graph *g = i->parent;
 	struct graph_value *x;
 
-	x = malloc(sizeof(*x));
-	memset(x, 0, sizeof(*x));
+	x = calloc(1, sizeof(*x));
 	INIT_FLIST_HEAD(&x->alias);
 	INIT_FLIST_HEAD(&x->list);
 	flist_add_tail(&x->list, &i->value_list);

init.c

@@ -1946,8 +1946,7 @@ static int __parse_jobs_ini(struct thread_data *td,
 	 * it's really 256 + small bit, 280 should suffice
 	 */
 	if (!nested) {
-		name = malloc(280);
-		memset(name, 0, 280);
+		name = calloc(1, 280);
 	}
 
 	opts = NULL;

t/io_uring.c

@@ -487,11 +487,10 @@ static void io_uring_probe(int fd)
 	struct io_uring_probe *p;
 	int ret;
 
-	p = malloc(sizeof(*p) + 256 * sizeof(struct io_uring_probe_op));
+	p = calloc(1, sizeof(*p) + 256 * sizeof(struct io_uring_probe_op));
 	if (!p)
 		return;
 
-	memset(p, 0, sizeof(*p) + 256 * sizeof(struct io_uring_probe_op));
 	ret = syscall(__NR_io_uring_register, fd, IORING_REGISTER_PROBE, p, 256);
 	if (ret < 0)
 		goto out;

t/lfsr-test.c

@@ -78,8 +78,7 @@ int main(int argc, char *argv[])
 	/* Create verification table */
 	if (verify) {
 		v_size = numbers * sizeof(uint8_t);
-		v = malloc(v_size);
-		memset(v, 0, v_size);
+		v = calloc(1, v_size);
 		printf("\nVerification table is %lf KiB\n", (double)(v_size) / 1024);
 	}
 	v_start = v;

verify.c

@@ -1595,8 +1595,7 @@ struct all_io_list *get_all_io_list(int save_mask, size_t *sz)
 	*sz = sizeof(*rep);
 	*sz += nr * sizeof(struct thread_io_list);
 	*sz += depth * sizeof(struct file_comp);
-	rep = malloc(*sz);
-	memset(rep, 0, *sz);
+	rep = calloc(1, *sz);
 
 	rep->threads = cpu_to_le64((uint64_t) nr);