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Linux-2.6.33 compat, .ctl_name removed from struct ctl_table

Browse Source 
As of linux-2.6.33 the ctl_name member of the ctl_table struct
has been entirely removed.  The upstream code has been updated
to depend entirely on the the procname member.  To handle this
all references to ctl_name are wrapped in a CTL_NAME macro which
simply expands to nothing for newer kernels.  Older kernels are
supported by having it expand to .ctl_name = X just as before.
This commit is contained in:
Brian Behlendorf 2010-06-30 10:36:20 -07:00
parent fd921c2e0c
commit 79a3bf130b
5 changed files with 201 additions and 38 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
config/spl-build.m4
View File

@ -36,6 +36,7 @@ AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
SPL_AC_PATH_IN_NAMEIDATA
SPL_AC_TASK_CURR
SPL_AC_CTL_UNNUMBERED
SPL_AC_CTL_NAME
SPL_AC_FLS64
SPL_AC_DEVICE_CREATE
SPL_AC_5ARGS_DEVICE_CREATE
@ -641,6 +642,25 @@ AC_DEFUN([SPL_AC_CTL_UNNUMBERED],
])
])
dnl #
dnl # 2.6.33 API change,
dnl # Removed .ctl_name from struct ctl_table.
dnl #
AC_DEFUN([SPL_AC_CTL_NAME], [
AC_MSG_CHECKING([whether struct ctl_table has ctl_name])
SPL_LINUX_TRY_COMPILE([
#include <linux/sysctl.h>
],[
struct ctl_table ctl;
ctl.ctl_name = 0;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_CTL_NAME, 1, [struct ctl_table has ctl_name])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 2.6.16 API change.
dnl # Check if 'fls64()' is available

132
configure vendored
View File

@ -12360,6 +12360,72 @@ $as_echo "no" >&6; }
fi
rm -Rf build
{ $as_echo "$as_me:$LINENO: checking whether struct ctl_table has ctl_name" >&5
$as_echo_n "checking whether struct ctl_table has ctl_name... " >&6; }
cat >conftest.c <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
#include <linux/sysctl.h>
int
main (void)
{
struct ctl_table ctl;
ctl.ctl_name = 0;
;
return 0;
}
_ACEOF
rm -Rf build && mkdir -p build
echo "obj-m := conftest.o" >build/Makefile
if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
{ $as_echo "$as_me:$LINENO: result: yes" >&5
$as_echo "yes" >&6; }
cat >>confdefs.h <<\_ACEOF
#define HAVE_CTL_NAME 1
_ACEOF
else
$as_echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
{ $as_echo "$as_me:$LINENO: result: no" >&5
$as_echo "no" >&6; }
fi
rm -Rf build
@ -15757,6 +15823,72 @@ $as_echo "no" >&6; }
fi
rm -Rf build
{ $as_echo "$as_me:$LINENO: checking whether struct ctl_table has ctl_name" >&5
$as_echo_n "checking whether struct ctl_table has ctl_name... " >&6; }
cat >conftest.c <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
#include <linux/sysctl.h>
int
main (void)
{
struct ctl_table ctl;
ctl.ctl_name = 0;
;
return 0;
}
_ACEOF
rm -Rf build && mkdir -p build
echo "obj-m := conftest.o" >build/Makefile
if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
{ $as_echo "$as_me:$LINENO: result: yes" >&5
$as_echo "yes" >&6; }
cat >>confdefs.h <<\_ACEOF
#define HAVE_CTL_NAME 1
_ACEOF
else
$as_echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
{ $as_echo "$as_me:$LINENO: result: no" >&5
$as_echo "no" >&6; }
fi
rm -Rf build

6
include/linux/proc_compat.h
View File

@ -36,6 +36,12 @@
#define spl_unregister_sysctl_table(t) unregister_sysctl_table(t)
#endif /* CONFIG_SYSCTL */
#ifdef HAVE_CTL_NAME
#define CTL_NAME(cname) .ctl_name = (cname),
#else
#define CTL_NAME(cname)
#endif
extern struct proc_dir_entry *proc_spl_kstat;
struct proc_dir_entry *proc_dir_entry_find(struct proc_dir_entry *root,
const char *str);

78
module/spl/spl-proc.c
View File

@ -52,6 +52,7 @@ static struct proc_dir_entry *proc_spl_kmem_slab = NULL;
#endif /* DEBUG_KMEM */
struct proc_dir_entry *proc_spl_kstat = NULL;
#ifdef HAVE_CTL_NAME
#ifdef HAVE_CTL_UNNUMBERED
#define CTL_SPL CTL_UNNUMBERED
@ -153,6 +154,7 @@ enum {
#endif
};
#endif /* HAVE_CTL_UNNUMBERED */
#endif /* HAVE_CTL_NAME */
static int
proc_copyin_string(char *kbuffer, int kbuffer_size,
@ -661,7 +663,7 @@ static struct file_operations proc_slab_operations = {
static struct ctl_table spl_debug_table[] = {
{
.ctl_name = CTL_DEBUG_SUBSYS,
CTL_NAME (CTL_DEBUG_SUBSYS)
.procname = "subsystem",
.data = &spl_debug_subsys,
.maxlen = sizeof(unsigned long),
@ -669,7 +671,7 @@ static struct ctl_table spl_debug_table[] = {
.proc_handler = &proc_dobitmasks
},
{
.ctl_name = CTL_DEBUG_MASK,
CTL_NAME (CTL_DEBUG_MASK)
.procname = "mask",
.data = &spl_debug_mask,
.maxlen = sizeof(unsigned long),
@ -677,7 +679,7 @@ static struct ctl_table spl_debug_table[] = {
.proc_handler = &proc_dobitmasks
},
{
.ctl_name = CTL_DEBUG_PRINTK,
CTL_NAME (CTL_DEBUG_PRINTK)
.procname = "printk",
.data = &spl_debug_printk,
.maxlen = sizeof(unsigned long),
@ -685,13 +687,13 @@ static struct ctl_table spl_debug_table[] = {
.proc_handler = &proc_dobitmasks
},
{
.ctl_name = CTL_DEBUG_MB,
CTL_NAME (CTL_DEBUG_MB)
.procname = "mb",
.mode = 0644,
.proc_handler = &proc_debug_mb,
},
{
.ctl_name = CTL_DEBUG_BINARY,
CTL_NAME (CTL_DEBUG_BINARY)
.procname = "binary",
.data = &spl_debug_binary,
.maxlen = sizeof(int),
@ -699,7 +701,7 @@ static struct ctl_table spl_debug_table[] = {
.proc_handler = &proc_dointvec,
},
{
.ctl_name = CTL_DEBUG_CATASTROPHE,
CTL_NAME (CTL_DEBUG_CATASTROPHE)
.procname = "catastrophe",
.data = &spl_debug_catastrophe,
.maxlen = sizeof(int),
@ -707,7 +709,7 @@ static struct ctl_table spl_debug_table[] = {
.proc_handler = &proc_dointvec,
},
{
.ctl_name = CTL_DEBUG_PANIC_ON_BUG,
CTL_NAME (CTL_DEBUG_PANIC_ON_BUG)
.procname = "panic_on_bug",
.data = &spl_debug_panic_on_bug,
.maxlen = sizeof(int),
@ -715,7 +717,7 @@ static struct ctl_table spl_debug_table[] = {
.proc_handler = &proc_dointvec
},
{
.ctl_name = CTL_DEBUG_PATH,
CTL_NAME (CTL_DEBUG_PATH)
.procname = "path",
.data = spl_debug_file_path,
.maxlen = sizeof(spl_debug_file_path),
@ -723,18 +725,18 @@ static struct ctl_table spl_debug_table[] = {
.proc_handler = &proc_dostring,
},
{
.ctl_name = CTL_DEBUG_DUMP,
CTL_NAME (CTL_DEBUG_DUMP)
.procname = "dump",
.mode = 0200,
.proc_handler = &proc_dump_kernel,
},
{ .ctl_name = CTL_DEBUG_FORCE_BUG,
{ CTL_NAME (CTL_DEBUG_FORCE_BUG)
.procname = "force_bug",
.mode = 0200,
.proc_handler = &proc_force_bug,
},
{
.ctl_name = CTL_CONSOLE_RATELIMIT,
CTL_NAME (CTL_CONSOLE_RATELIMIT)
.procname = "console_ratelimit",
.data = &spl_console_ratelimit,
.maxlen = sizeof(int),
@ -742,28 +744,28 @@ static struct ctl_table spl_debug_table[] = {
.proc_handler = &proc_dointvec,
},
{
.ctl_name = CTL_CONSOLE_MAX_DELAY_CS,
CTL_NAME (CTL_CONSOLE_MAX_DELAY_CS)
.procname = "console_max_delay_centisecs",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_console_max_delay_cs,
},
{
.ctl_name = CTL_CONSOLE_MIN_DELAY_CS,
CTL_NAME (CTL_CONSOLE_MIN_DELAY_CS)
.procname = "console_min_delay_centisecs",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_console_min_delay_cs,
},
{
.ctl_name = CTL_CONSOLE_BACKOFF,
CTL_NAME (CTL_CONSOLE_BACKOFF)
.procname = "console_backoff",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_console_backoff,
},
{
.ctl_name = CTL_DEBUG_STACK_SIZE,
CTL_NAME (CTL_DEBUG_STACK_SIZE)
.procname = "stack_max",
.data = &spl_debug_stack,
.maxlen = sizeof(int),
@ -775,7 +777,7 @@ static struct ctl_table spl_debug_table[] = {
static struct ctl_table spl_vm_table[] = {
{
.ctl_name = CTL_VM_MINFREE,
CTL_NAME (CTL_VM_MINFREE)
.procname = "minfree",
.data = &minfree,
.maxlen = sizeof(int),
@ -783,7 +785,7 @@ static struct ctl_table spl_vm_table[] = {
.proc_handler = &proc_dointvec,
},
{
.ctl_name = CTL_VM_DESFREE,
CTL_NAME (CTL_VM_DESFREE)
.procname = "desfree",
.data = &desfree,
.maxlen = sizeof(int),
@ -791,7 +793,7 @@ static struct ctl_table spl_vm_table[] = {
.proc_handler = &proc_dointvec,
},
{
.ctl_name = CTL_VM_LOTSFREE,
CTL_NAME (CTL_VM_LOTSFREE)
.procname = "lotsfree",
.data = &lotsfree,
.maxlen = sizeof(int),
@ -799,7 +801,7 @@ static struct ctl_table spl_vm_table[] = {
.proc_handler = &proc_dointvec,
},
{
.ctl_name = CTL_VM_NEEDFREE,
CTL_NAME (CTL_VM_NEEDFREE)
.procname = "needfree",
.data = &needfree,
.maxlen = sizeof(int),
@ -807,7 +809,7 @@ static struct ctl_table spl_vm_table[] = {
.proc_handler = &proc_dointvec,
},
{
.ctl_name = CTL_VM_SWAPFS_MINFREE,
CTL_NAME (CTL_VM_SWAPFS_MINFREE)
.procname = "swapfs_minfree",
.data = &swapfs_minfree,
.maxlen = sizeof(int),
@ -815,7 +817,7 @@ static struct ctl_table spl_vm_table[] = {
.proc_handler = &proc_dointvec,
},
{
.ctl_name = CTL_VM_SWAPFS_RESERVE,
CTL_NAME (CTL_VM_SWAPFS_RESERVE)
.procname = "swapfs_reserve",
.data = &swapfs_reserve,
.maxlen = sizeof(int),
@ -823,13 +825,13 @@ static struct ctl_table spl_vm_table[] = {
.proc_handler = &proc_dointvec,
},
{
.ctl_name = CTL_VM_AVAILRMEM,
CTL_NAME (CTL_VM_AVAILRMEM)
.procname = "availrmem",
.mode = 0444,
.proc_handler = &proc_doavailrmem,
},
{
.ctl_name = CTL_VM_FREEMEM,
CTL_NAME (CTL_VM_FREEMEM)
.procname = "freemem",
.data = (void *)2,
.maxlen = sizeof(int),
@ -837,7 +839,7 @@ static struct ctl_table spl_vm_table[] = {
.proc_handler = &proc_dofreemem,
},
{
.ctl_name = CTL_VM_PHYSMEM,
CTL_NAME (CTL_VM_PHYSMEM)
.procname = "physmem",
.data = &physmem,
.maxlen = sizeof(int),
@ -850,7 +852,7 @@ static struct ctl_table spl_vm_table[] = {
#ifdef DEBUG_KMEM
static struct ctl_table spl_kmem_table[] = {
{
.ctl_name = CTL_KMEM_KMEMUSED,
CTL_NAME (CTL_KMEM_KMEMUSED)
.procname = "kmem_used",
.data = &kmem_alloc_used,
# ifdef HAVE_ATOMIC64_T
@ -862,7 +864,7 @@ static struct ctl_table spl_kmem_table[] = {
.proc_handler = &proc_domemused,
},
{
.ctl_name = CTL_KMEM_KMEMMAX,
CTL_NAME (CTL_KMEM_KMEMMAX)
.procname = "kmem_max",
.data = &kmem_alloc_max,
.maxlen = sizeof(unsigned long),
@ -872,7 +874,7 @@ static struct ctl_table spl_kmem_table[] = {
.proc_handler = &proc_doulongvec_minmax,
},
{
.ctl_name = CTL_KMEM_VMEMUSED,
CTL_NAME (CTL_KMEM_VMEMUSED)
.procname = "vmem_used",
.data = &vmem_alloc_used,
# ifdef HAVE_ATOMIC64_T
@ -884,7 +886,7 @@ static struct ctl_table spl_kmem_table[] = {
.proc_handler = &proc_domemused,
},
{
.ctl_name = CTL_KMEM_VMEMMAX,
CTL_NAME (CTL_KMEM_VMEMMAX)
.procname = "vmem_max",
.data = &vmem_alloc_max,
.maxlen = sizeof(unsigned long),
@ -906,7 +908,7 @@ static struct ctl_table spl_table[] = {
* sysctl(8) prefers to go via /proc for portability.
*/
{
.ctl_name = CTL_VERSION,
CTL_NAME (CTL_VERSION)
.procname = "version",
.data = spl_version,
.maxlen = sizeof(spl_version),
@ -914,7 +916,7 @@ static struct ctl_table spl_table[] = {
.proc_handler = &proc_dostring,
},
{
.ctl_name = CTL_HOSTID,
CTL_NAME (CTL_HOSTID)
.procname = "hostid",
.data = &spl_hostid,
.maxlen = sizeof(unsigned long),
@ -922,7 +924,7 @@ static struct ctl_table spl_table[] = {
.proc_handler = &proc_dohostid,
},
{
.ctl_name = CTL_HW_SERIAL,
CTL_NAME (CTL_HW_SERIAL)
.procname = "hw_serial",
.data = hw_serial,
.maxlen = sizeof(hw_serial),
@ -931,7 +933,7 @@ static struct ctl_table spl_table[] = {
},
#ifndef HAVE_KALLSYMS_LOOKUP_NAME
{
.ctl_name = CTL_KALLSYMS,
CTL_NAME (CTL_KALLSYMS)
.procname = "kallsyms_lookup_name",
.data = &spl_kallsyms_lookup_name_fn,
.maxlen = sizeof(unsigned long),
@ -940,27 +942,27 @@ static struct ctl_table spl_table[] = {
},
#endif
{
.ctl_name = CTL_SPL_DEBUG,
CTL_NAME (CTL_SPL_DEBUG)
.procname = "debug",
.mode = 0555,
.child = spl_debug_table,
},
{
.ctl_name = CTL_SPL_VM,
CTL_NAME (CTL_SPL_VM)
.procname = "vm",
.mode = 0555,
.child = spl_vm_table,
},
#ifdef DEBUG_KMEM
{
.ctl_name = CTL_SPL_KMEM,
CTL_NAME (CTL_SPL_KMEM)
.procname = "kmem",
.mode = 0555,
.child = spl_kmem_table,
},
#endif
{
.ctl_name = CTL_SPL_KSTAT,
CTL_NAME (CTL_SPL_KSTAT)
.procname = "kstat",
.mode = 0555,
.child = spl_kstat_table,
@ -970,7 +972,7 @@ static struct ctl_table spl_table[] = {
static struct ctl_table spl_dir[] = {
{
.ctl_name = CTL_SPL,
CTL_NAME (CTL_SPL)
.procname = "spl",
.mode = 0555,
.child = spl_table,
@ -980,7 +982,7 @@ static struct ctl_table spl_dir[] = {
static struct ctl_table spl_root[] = {
{
.ctl_name = CTL_KERN,
CTL_NAME (CTL_KERN)
.procname = "kernel",
.mode = 0555,
.child = spl_dir,

3
spl_config.h.in
View File

@ -48,6 +48,9 @@
/* struct cred exists */
#undef HAVE_CRED_STRUCT
/* struct ctl_table has ctl_name */
#undef HAVE_CTL_NAME
/* unnumbered sysctl support exists */
#undef HAVE_CTL_UNNUMBERED