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Remove the discard_const() macro

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Declare dynamically allocated strings as 'char *' instead of 'const char *'.
Remove the discard_const() macro. Do not test whether or not a pointer is
NULL before calling free() because it is allowed to pass NULL to free().

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
This commit is contained in:
Bart Van Assche
2020-02-28 21:32:30 -08:00
parent aff4b7600b
commit 3804f3c2e0
18 changed files with 50 additions and 141 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
aros/iscsi-ls.c
View File

@@ -37,10 +37,6 @@
#include "iscsi.h"
#include "scsi-lowlevel.h"
#ifndef discard_const
#define discard_const(ptr) ((void *)((intptr_t)(ptr)))
#endif
int showluns;
const char *initiator = "iqn.2007-10.com.github:sahlberg:libiscsi:iscsi-ls";
@@ -318,7 +314,7 @@ int main(int argc, char *argv[])
struct iscsi_context *iscsi;
struct iscsi_url *iscsi_url = NULL;
struct client_state state;
const char *url = NULL;
char *url = NULL;
int c;
static int show_help = 0, show_usage = 0, debug = 0;
@@ -384,9 +380,7 @@ int main(int argc, char *argv[])
iscsi_url = iscsi_parse_portal_url(iscsi, url);
if (url) {
free(discard_const(url));
}
free(url);
if (iscsi_url == NULL) {
fprintf(stderr, "Failed to parse URL: %s\n",

4
include/iscsi-private.h
View File

@@ -31,10 +31,6 @@
extern "C" {
#endif
#ifndef discard_const
#define discard_const(ptr) ((void *)((intptr_t)(ptr)))
#endif
#ifndef MIN
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
#endif

4
include/iscsi.h
View File

@@ -549,12 +549,12 @@ EXTERN int iscsi_logout_sync(struct iscsi_context *iscsi);
struct iscsi_target_portal {
struct iscsi_target_portal *next;
const char *portal;
char *portal;
};
struct iscsi_discovery_address {
struct iscsi_discovery_address *next;
const char *target_name;
char *target_name;
struct iscsi_target_portal *portals;
};

6
lib/discovery.c
View File

@@ -89,14 +89,14 @@ iscsi_free_discovery_addresses(struct iscsi_context *iscsi, struct iscsi_discove
while (addresses != NULL) {
struct iscsi_discovery_address *next = addresses->next;
iscsi_free(iscsi, discard_const(addresses->target_name));
iscsi_free(iscsi, addresses->target_name);
addresses->target_name = NULL;
while (addresses->portals != NULL) {
struct iscsi_target_portal *next_portal = addresses->portals->next;
iscsi_free(iscsi, discard_const(addresses->portals->portal));
iscsi_free(iscsi, discard_const(addresses->portals));
iscsi_free(iscsi, addresses->portals->portal);
iscsi_free(iscsi, addresses->portals);
addresses->portals = next_portal;
}

5
lib/sync.c
View File

@@ -1828,11 +1828,12 @@ void iscsi_free_discovery_data(struct iscsi_context *iscsi _U_,
while (da->portals) {
struct iscsi_target_portal *ponext = da->portals->next;
free(discard_const(da->portals->portal));
free(da->portals->portal);
free(da->portals);
da->portals = ponext;
}
free(discard_const(da->target_name));
free(da->target_name);
free(da);
da = danext;
}

30
test-tool/iscsi-support.c
View File

@@ -298,10 +298,8 @@ static struct scsi_task *send_scsi_command(struct scsi_device *sdev, struct scsi
if (sdev->iscsi_url) {
time_t current_time = time(NULL);
if (sdev->error_str != NULL) {
free(discard_const(sdev->error_str));
sdev->error_str = NULL;
}
free(sdev->error_str);
sdev->error_str = NULL;
task = iscsi_scsi_command_sync(sdev->iscsi_ctx, sdev->iscsi_lun, task, NULL);
if (task == NULL) {
sdev->error_str = strdup(iscsi_get_error(sdev->iscsi_ctx));
@@ -372,9 +370,7 @@ static struct scsi_task *send_scsi_command(struct scsi_device *sdev, struct scsi
if(ioctl(sdev->sgio_fd, SG_IO, &io_hdr) < 0){
int err = errno;
if (sdev->error_str != NULL) {
free(discard_const(sdev->error_str));
}
free(sdev->error_str);
if (asprintf(&sdev->error_str, "SG_IO ioctl failed: %s",
strerror(err)) < 0)
sdev->error_str = NULL;
@@ -401,18 +397,14 @@ static struct scsi_task *send_scsi_command(struct scsi_device *sdev, struct scsi
task->sense.key,
scsi_sense_ascq_str(task->sense.ascq),
task->sense.ascq);
if (sdev->error_str != NULL) {
free(discard_const(sdev->error_str));
}
free(sdev->error_str);
sdev->error_str = strdup(buf);
return task;
}
if(io_hdr.status == SCSI_STATUS_RESERVATION_CONFLICT){
task->status = SCSI_STATUS_RESERVATION_CONFLICT;
if (sdev->error_str != NULL) {
free(discard_const(sdev->error_str));
}
free(sdev->error_str);
sdev->error_str = strdup("Reservation Conflict");
return task;
}
@@ -422,9 +414,7 @@ static struct scsi_task *send_scsi_command(struct scsi_device *sdev, struct scsi
task->sense.key = 0x0f;
task->sense.ascq = 0xffff;
if (sdev->error_str != NULL) {
free(discard_const(sdev->error_str));
}
free(sdev->error_str);
sdev->error_str = strdup("SCSI masked error");
return NULL;
}
@@ -434,9 +424,7 @@ static struct scsi_task *send_scsi_command(struct scsi_device *sdev, struct scsi
task->sense.ascq = 0xffff;
snprintf(buf, sizeof(buf), "SCSI host error. Status=0x%x", io_hdr.host_status);
if (sdev->error_str != NULL) {
free(discard_const(sdev->error_str));
}
free(sdev->error_str);
sdev->error_str = strdup(buf);
return task;
}
@@ -445,9 +433,7 @@ static struct scsi_task *send_scsi_command(struct scsi_device *sdev, struct scsi
task->sense.key = 0x0f;
task->sense.ascq = 0xffff;
if (sdev->error_str != NULL) {
free(discard_const(sdev->error_str));
}
free(sdev->error_str);
sdev->error_str = strdup("SCSI driver error");
return NULL;
}

4
test-tool/iscsi-support.h
View File

@@ -30,10 +30,6 @@
#include "iscsi.h"
#include "scsi-lowlevel.h"
#ifndef discard_const
#define discard_const(ptr) ((void *)((intptr_t)(ptr)))
#endif
extern const char *initiatorname1;
extern const char *initiatorname2;

12
tests/prog_header_digest.c
View File

@@ -37,10 +37,6 @@
#include "iscsi-private.h"
#include "scsi-lowlevel.h"
#ifndef discard_const
#define discard_const(ptr) ((void *)((intptr_t)(ptr)))
#endif
const char *initiator = "iqn.2007-10.com.github:sahlberg:libiscsi:prog-header-digest";
struct client_state {
@@ -136,7 +132,7 @@ int main(int argc, char *argv[])
struct iscsi_context *iscsi;
struct iscsi_url *iscsi_url = NULL;
struct client_state state;
const char *url = NULL;
char *url = NULL;
int c;
static int show_help = 0, show_usage = 0, debug = 0;
@@ -210,10 +206,8 @@ int main(int argc, char *argv[])
}
iscsi_url = iscsi_parse_full_url(iscsi, url);
if (url) {
free(discard_const(url));
}
free(url);
if (iscsi_url == NULL) {
fprintf(stderr, "Failed to parse URL: %s\n",

12
tests/prog_noop_reply.c
View File

@@ -37,10 +37,6 @@
#include "iscsi-private.h"
#include "scsi-lowlevel.h"
#ifndef discard_const
#define discard_const(ptr) ((void *)((intptr_t)(ptr)))
#endif
const char *initiator = "iqn.2007-10.com.github:sahlberg:libiscsi:prog-noop-reply";
struct client_state {
@@ -136,7 +132,7 @@ int main(int argc, char *argv[])
struct iscsi_context *iscsi;
struct iscsi_url *iscsi_url = NULL;
struct client_state state;
const char *url = NULL;
char *url = NULL;
int c;
static int show_help = 0, show_usage = 0, debug = 0;
@@ -210,10 +206,8 @@ int main(int argc, char *argv[])
}
iscsi_url = iscsi_parse_full_url(iscsi, url);
if (url) {
free(discard_const(url));
}
free(url);
if (iscsi_url == NULL) {
fprintf(stderr, "Failed to parse URL: %s\n",

12
tests/prog_read_all_pdus.c
View File

@@ -34,10 +34,6 @@
#include "iscsi.h"
#include "scsi-lowlevel.h"
#ifndef discard_const
#define discard_const(ptr) ((void *)((intptr_t)(ptr)))
#endif
const char *initiator = "iqn.2007-10.com.github:sahlberg:libiscsi:prog-readwrite-iov";
void print_usage(void)
@@ -84,7 +80,7 @@ int main(int argc, char *argv[])
{
struct iscsi_context *iscsi;
struct iscsi_url *iscsi_url = NULL;
const char *url = NULL;
char *url = NULL;
static int show_help = 0, show_usage = 0, debug = 0;
int c, i, count;
@@ -156,10 +152,8 @@ int main(int argc, char *argv[])
}
iscsi_url = iscsi_parse_full_url(iscsi, url);
if (url) {
free(discard_const(url));
}
free(url);
if (iscsi_url == NULL) {
fprintf(stderr, "Failed to parse URL: %s\n",

12
tests/prog_readwrite_iov.c
View File

@@ -34,10 +34,6 @@
#include "iscsi.h"
#include "scsi-lowlevel.h"
#ifndef discard_const
#define discard_const(ptr) ((void *)((intptr_t)(ptr)))
#endif
const char *initiator = "iqn.2007-10.com.github:sahlberg:libiscsi:prog-readwrite-iov";
void print_usage(void)
@@ -75,7 +71,7 @@ int main(int argc, char *argv[])
{
struct iscsi_context *iscsi;
struct iscsi_url *iscsi_url = NULL;
const char *url = NULL;
char *url = NULL;
static int show_help = 0, show_usage = 0, debug = 0;
struct scsi_task *task;
struct scsi_iovec iov[4];
@@ -152,10 +148,8 @@ int main(int argc, char *argv[])
}
iscsi_url = iscsi_parse_full_url(iscsi, url);
if (url) {
free(discard_const(url));
}
free(url);
if (iscsi_url == NULL) {
fprintf(stderr, "Failed to parse URL: %s\n",

12
tests/prog_reconnect.c
View File

@@ -34,10 +34,6 @@
#include "iscsi.h"
#include "scsi-lowlevel.h"
#ifndef discard_const
#define discard_const(ptr) ((void *)((intptr_t)(ptr)))
#endif
const char *initiator = "iqn.2007-10.com.github:sahlberg:libiscsi:prog-reconnect";
struct client_state {
@@ -194,7 +190,7 @@ int main(int argc, char *argv[])
struct iscsi_context *iscsi;
struct iscsi_url *iscsi_url = NULL;
struct client_state state;
const char *url = NULL;
char *url = NULL;
int i, c;
static int show_help = 0, show_usage = 0, debug = 0;
struct scsi_readcapacity10 *rc10;
@@ -270,10 +266,8 @@ int main(int argc, char *argv[])
}
iscsi_url = iscsi_parse_full_url(iscsi, url);
if (url) {
free(discard_const(url));
}
free(url);
if (iscsi_url == NULL) {
fprintf(stderr, "Failed to parse URL: %s\n",

12
tests/prog_reconnect_timeout.c
View File

@@ -34,10 +34,6 @@
#include "iscsi.h"
#include "scsi-lowlevel.h"
#ifndef discard_const
#define discard_const(ptr) ((void *)((intptr_t)(ptr)))
#endif
const char *initiator = "iqn.2007-10.com.github:sahlberg:libiscsi:prog-reconnect-timeout";
struct client_state {
@@ -217,7 +213,7 @@ int main(int argc, char *argv[])
struct iscsi_context *iscsi;
struct iscsi_url *iscsi_url = NULL;
struct client_state state;
const char *url = NULL;
char *url = NULL;
int i, c;
static int show_help = 0, show_usage = 0, debug = 0;
struct scsi_readcapacity10 *rc10;
@@ -293,10 +289,8 @@ int main(int argc, char *argv[])
}
iscsi_url = iscsi_parse_full_url(iscsi, url);
if (url) {
free(discard_const(url));
}
free(url);
if (iscsi_url == NULL) {
fprintf(stderr, "Failed to parse URL: %s\n",

10
tests/prog_timeout.c
View File

@@ -38,10 +38,6 @@
#include "iscsi-private.h"
#include "scsi-lowlevel.h"
#ifndef discard_const
#define discard_const(ptr) ((void *)((intptr_t)(ptr)))
#endif
const char *initiator = "iqn.2007-10.com.github:sahlberg:libiscsi:prog-timeout";
void print_usage(void)
@@ -108,7 +104,7 @@ int main(int argc, char *argv[])
{
struct iscsi_context *iscsi;
struct iscsi_url *iscsi_url = NULL;
const char *url = NULL;
char *url = NULL;
int c;
static int show_help = 0, show_usage = 0, debug = 0;
uint32_t count;
@@ -182,9 +178,7 @@ int main(int argc, char *argv[])
iscsi_url = iscsi_parse_full_url(iscsi, url);
if (url) {
free(discard_const(url));
}
free(url);
if (iscsi_url == NULL) {
fprintf(stderr, "Failed to parse URL: %s\n",

12
utils/iscsi-inq.c
View File

@@ -31,10 +31,6 @@
#include "iscsi.h"
#include "scsi-lowlevel.h"
#ifndef discard_const
#define discard_const(ptr) ((void *)((intptr_t)(ptr)))
#endif
const char *initiator = "iqn.2007-10.com.github:sahlberg:libiscsi:iscsi-inq";
void inquiry_block_limits(struct scsi_inquiry_block_limits *inq)
@@ -236,7 +232,7 @@ void print_help(void)
int main(int argc, char *argv[])
{
struct iscsi_context *iscsi;
const char *url = NULL;
char *url = NULL;
struct iscsi_url *iscsi_url = NULL;
int evpd = 0, pagecode = 0;
int show_help = 0, show_usage = 0, debug = 0;
@@ -312,10 +308,8 @@ int main(int argc, char *argv[])
exit(10);
}
iscsi_url = iscsi_parse_full_url(iscsi, url);
if (url) {
free(discard_const(url));
}
free(url);
if (iscsi_url == NULL) {
fprintf(stderr, "Failed to parse URL: %s\n",

12
utils/iscsi-ls.c
View File

@@ -40,10 +40,6 @@ WSADATA wsaData;
#include "iscsi.h"
#include "scsi-lowlevel.h"
#ifndef discard_const
#define discard_const(ptr) ((void *)((intptr_t)(ptr)))
#endif
int showluns;
int useurls;
const char *initiator = "iqn.2007-10.com.github:sahlberg:libiscsi:iscsi-ls";
@@ -349,7 +345,7 @@ int main(int argc, char *argv[])
struct iscsi_context *iscsi;
struct iscsi_url *iscsi_url = NULL;
struct client_state state;
const char *url = NULL;
char *url = NULL;
int i;
static int show_help = 0, show_usage = 0, debug = 0;
@@ -418,10 +414,8 @@ int main(int argc, char *argv[])
}
iscsi_url = iscsi_parse_portal_url(iscsi, url);
if (url) {
free(discard_const(url));
}
free(url);
if (iscsi_url == NULL) {
fprintf(stderr, "Failed to parse URL: %s\n",

12
utils/iscsi-readcapacity16.c
View File

@@ -26,10 +26,6 @@
#include "iscsi.h"
#include "scsi-lowlevel.h"
#ifndef discard_const
#define discard_const(ptr) ((void *)((intptr_t)(ptr)))
#endif
const char *initiator = "iqn.2007-10.com.github:sahlberg:libiscsi:iscsi-readcapacity16";
void print_usage(void)
@@ -59,7 +55,7 @@ void print_help(void)
int main(int argc, char *argv[])
{
struct iscsi_context *iscsi;
const char *url = NULL;
char *url = NULL;
struct iscsi_url *iscsi_url = NULL;
int show_help = 0, show_usage = 0, debug = 0, size_only=0;
int c;
@@ -134,10 +130,8 @@ int main(int argc, char *argv[])
exit(10);
}
iscsi_url = iscsi_parse_full_url(iscsi, url);
if (url) {
free(discard_const(url));
}
free(url);
if (iscsi_url == NULL) {
fprintf(stderr, "Failed to parse URL: %s\n",

10
utils/iscsi-swp.c
View File

@@ -30,10 +30,6 @@
#include "iscsi.h"
#include "scsi-lowlevel.h"
#ifndef discard_const
#define discard_const(ptr) ((void *)((intptr_t)(ptr)))
#endif
const char *initiator = "iqn.2007-10.com.github:sahlberg:libiscsi:iscsi-swp";
@@ -65,7 +61,7 @@ void print_help(void)
int main(int argc, char *argv[])
{
struct iscsi_context *iscsi;
const char *url = NULL;
char *url = NULL;
struct iscsi_url *iscsi_url = NULL;
int show_help = 0, show_usage = 0, debug = 0;
int c;
@@ -148,8 +144,8 @@ int main(int argc, char *argv[])
goto finished;
}
iscsi_url = iscsi_parse_full_url(iscsi, url);
free(discard_const(url));
free(url);
if (iscsi_url == NULL) {
fprintf(stderr, "Failed to parse URL: %s\n",