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freebsd: add ifdefs around legacy ioctl support

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Require that ZFS_LEGACY_SUPPORT be defined for legacy ioctl support to
be built.  For now, define it in zfs_ioctl_compat.h so support is always
built.  This will allow systems that need never support pre-openzfs
tools a mechanism to remove support at build time.  This code should
be removed once the need for tool compatability is gone.

No functional change at this time.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Brooks Davis <brooks.davis@sri.com>
Closes #14127
This commit is contained in:
Brooks Davis
2022-10-27 22:45:44 +01:00
committed by Brian Behlendorf
parent 6c89cffc2c
commit 20b867f5f7
5 changed files with 45 additions and 3 deletions
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lib/libzfs_core/os/freebsd/libzfs_core_ioctl.c
+12 -1
View File
@@ -46,8 +46,11 @@ get_zfs_ioctl_version(void)
static int
zcmd_ioctl_compat(int fd, int request, zfs_cmd_t *zc, const int cflag)
{
int newrequest, ret;
int ret;
#ifdef ZFS_LEGACY_SUPPORT
int newrequest;
void *zc_c = NULL;
#endif
unsigned long ncmd;
zfs_iocparm_t zp;
@@ -58,6 +61,7 @@ zcmd_ioctl_compat(int fd, int request, zfs_cmd_t *zc, const int cflag)
zp.zfs_cmd_size = sizeof (zfs_cmd_t);
zp.zfs_ioctl_version = ZFS_IOCVER_OZFS;
break;
#ifdef ZFS_LEGACY_SUPPORT
case ZFS_CMD_COMPAT_LEGACY:
newrequest = zfs_ioctl_ozfs_to_legacy(request);
ncmd = _IOWR('Z', newrequest, zfs_iocparm_t);
@@ -67,6 +71,7 @@ zcmd_ioctl_compat(int fd, int request, zfs_cmd_t *zc, const int cflag)
zp.zfs_cmd_size = sizeof (zfs_cmd_legacy_t);
zp.zfs_ioctl_version = ZFS_IOCVER_LEGACY;
break;
#endif
default:
abort();
return (EINVAL);
@@ -74,14 +79,18 @@ zcmd_ioctl_compat(int fd, int request, zfs_cmd_t *zc, const int cflag)
ret = ioctl(fd, ncmd, &zp);
if (ret) {
#ifdef ZFS_LEGACY_SUPPORT
if (zc_c)
free(zc_c);
#endif
return (ret);
}
#ifdef ZFS_LEGACY_SUPPORT
if (zc_c) {
zfs_cmd_legacy_to_ozfs(zc_c, zc);
free(zc_c);
}
#endif
return (ret);
}
@@ -100,9 +109,11 @@ lzc_ioctl_fd(int fd, unsigned long request, zfs_cmd_t *zc)
zfs_ioctl_version = get_zfs_ioctl_version();
switch (zfs_ioctl_version) {
#ifdef ZFS_LEGACY_SUPPORT
case ZFS_IOCVER_LEGACY:
cflag = ZFS_CMD_COMPAT_LEGACY;
break;
#endif
case ZFS_IOCVER_OZFS:
cflag = ZFS_CMD_COMPAT_NONE;
break;