typedef u16 compat_ipc_pid_t;
typedef u32 compat_caddr_t;
typedef __kernel_fsid_t compat_fsid_t;
-typedef s64 compat_s64;
-typedef u64 compat_u64;
struct compat_stat {
#ifdef __AARCH64EB__
typedef struct {
s32 val[2];
} compat_fsid_t;
-typedef s64 compat_s64;
-typedef u64 compat_u64;
struct compat_stat {
compat_dev_t st_dev;
typedef u16 compat_nlink_t;
typedef u16 compat_ipc_pid_t;
typedef u32 compat_caddr_t;
-typedef s64 compat_s64;
-typedef u64 compat_u64;
struct compat_stat {
compat_dev_t st_dev; /* dev_t is 32 bits on parisc */
typedef u16 compat_ipc_pid_t;
typedef u32 compat_caddr_t;
typedef __kernel_fsid_t compat_fsid_t;
-typedef s64 compat_s64;
-typedef u64 compat_u64;
struct compat_stat {
compat_dev_t st_dev;
typedef u16 compat_ipc_pid_t;
typedef u32 compat_caddr_t;
typedef __kernel_fsid_t compat_fsid_t;
-typedef s64 compat_s64;
-typedef u64 compat_u64;
typedef struct {
u32 mask;
typedef u16 compat_ipc_pid_t;
typedef u32 compat_caddr_t;
typedef __kernel_fsid_t compat_fsid_t;
-typedef s64 compat_s64;
-typedef u64 compat_u64;
+
struct compat_stat {
compat_dev_t st_dev;
compat_ino_t st_ino;
128 i386 init_module sys_init_module
129 i386 delete_module sys_delete_module
130 i386 get_kernel_syms
-131 i386 quotactl sys_quotactl compat_sys_quotactl32
+131 i386 quotactl sys_quotactl
132 i386 getpgid sys_getpgid
133 i386 fchdir sys_fchdir
134 i386 bdflush sys_bdflush
typedef u16 compat_ipc_pid_t;
typedef u32 compat_caddr_t;
typedef __kernel_fsid_t compat_fsid_t;
-typedef s64 __attribute__((aligned(4))) compat_s64;
-typedef u64 __attribute__((aligned(4))) compat_u64;
struct compat_stat {
compat_dev_t st_dev;
return in_32bit_syscall();
}
#define in_compat_syscall in_compat_syscall /* override the generic impl */
+#define compat_need_64bit_alignment_fixup in_ia32_syscall
#endif
struct compat_siginfo;
config QUOTACTL
bool
default n
-
-config QUOTACTL_COMPAT
- bool
- depends on QUOTACTL && COMPAT_FOR_U64_ALIGNMENT
- default y
obj-$(CONFIG_QFMT_V2) += quota_v2.o
obj-$(CONFIG_QUOTA_TREE) += quota_tree.o
obj-$(CONFIG_QUOTACTL) += quota.o kqid.o
-obj-$(CONFIG_QUOTACTL_COMPAT) += compat.o
obj-$(CONFIG_QUOTA_NETLINK_INTERFACE) += netlink.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-
-#include <linux/syscalls.h>
-#include <linux/compat.h>
-#include <linux/quotaops.h>
-
-/*
- * This code works only for 32 bit quota tools over 64 bit OS (x86_64, ia64)
- * and is necessary due to alignment problems.
- */
-struct compat_if_dqblk {
- compat_u64 dqb_bhardlimit;
- compat_u64 dqb_bsoftlimit;
- compat_u64 dqb_curspace;
- compat_u64 dqb_ihardlimit;
- compat_u64 dqb_isoftlimit;
- compat_u64 dqb_curinodes;
- compat_u64 dqb_btime;
- compat_u64 dqb_itime;
- compat_uint_t dqb_valid;
-};
-
-/* XFS structures */
-struct compat_fs_qfilestat {
- compat_u64 dqb_bhardlimit;
- compat_u64 qfs_nblks;
- compat_uint_t qfs_nextents;
-};
-
-struct compat_fs_quota_stat {
- __s8 qs_version;
- __u16 qs_flags;
- __s8 qs_pad;
- struct compat_fs_qfilestat qs_uquota;
- struct compat_fs_qfilestat qs_gquota;
- compat_uint_t qs_incoredqs;
- compat_int_t qs_btimelimit;
- compat_int_t qs_itimelimit;
- compat_int_t qs_rtbtimelimit;
- __u16 qs_bwarnlimit;
- __u16 qs_iwarnlimit;
-};
-
-COMPAT_SYSCALL_DEFINE4(quotactl32, unsigned int, cmd,
- const char __user *, special, qid_t, id,
- void __user *, addr)
-{
- unsigned int cmds;
- struct if_dqblk __user *dqblk;
- struct compat_if_dqblk __user *compat_dqblk;
- struct fs_quota_stat __user *fsqstat;
- struct compat_fs_quota_stat __user *compat_fsqstat;
- compat_uint_t data;
- u16 xdata;
- long ret;
-
- cmds = cmd >> SUBCMDSHIFT;
-
- switch (cmds) {
- case Q_GETQUOTA:
- dqblk = compat_alloc_user_space(sizeof(struct if_dqblk));
- compat_dqblk = addr;
- ret = kernel_quotactl(cmd, special, id, dqblk);
- if (ret)
- break;
- if (copy_in_user(compat_dqblk, dqblk, sizeof(*compat_dqblk)) ||
- get_user(data, &dqblk->dqb_valid) ||
- put_user(data, &compat_dqblk->dqb_valid))
- ret = -EFAULT;
- break;
- case Q_SETQUOTA:
- dqblk = compat_alloc_user_space(sizeof(struct if_dqblk));
- compat_dqblk = addr;
- ret = -EFAULT;
- if (copy_in_user(dqblk, compat_dqblk, sizeof(*compat_dqblk)) ||
- get_user(data, &compat_dqblk->dqb_valid) ||
- put_user(data, &dqblk->dqb_valid))
- break;
- ret = kernel_quotactl(cmd, special, id, dqblk);
- break;
- case Q_XGETQSTAT:
- fsqstat = compat_alloc_user_space(sizeof(struct fs_quota_stat));
- compat_fsqstat = addr;
- ret = kernel_quotactl(cmd, special, id, fsqstat);
- if (ret)
- break;
- ret = -EFAULT;
- /* Copying qs_version, qs_flags, qs_pad */
- if (copy_in_user(compat_fsqstat, fsqstat,
- offsetof(struct compat_fs_quota_stat, qs_uquota)))
- break;
- /* Copying qs_uquota */
- if (copy_in_user(&compat_fsqstat->qs_uquota,
- &fsqstat->qs_uquota,
- sizeof(compat_fsqstat->qs_uquota)) ||
- get_user(data, &fsqstat->qs_uquota.qfs_nextents) ||
- put_user(data, &compat_fsqstat->qs_uquota.qfs_nextents))
- break;
- /* Copying qs_gquota */
- if (copy_in_user(&compat_fsqstat->qs_gquota,
- &fsqstat->qs_gquota,
- sizeof(compat_fsqstat->qs_gquota)) ||
- get_user(data, &fsqstat->qs_gquota.qfs_nextents) ||
- put_user(data, &compat_fsqstat->qs_gquota.qfs_nextents))
- break;
- /* Copying the rest */
- if (copy_in_user(&compat_fsqstat->qs_incoredqs,
- &fsqstat->qs_incoredqs,
- sizeof(struct compat_fs_quota_stat) -
- offsetof(struct compat_fs_quota_stat, qs_incoredqs)) ||
- get_user(xdata, &fsqstat->qs_iwarnlimit) ||
- put_user(xdata, &compat_fsqstat->qs_iwarnlimit))
- break;
- ret = 0;
- break;
- default:
- ret = kernel_quotactl(cmd, special, id, addr);
- }
- return ret;
-}
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/compat.h>
+
+struct compat_if_dqblk {
+ compat_u64 dqb_bhardlimit;
+ compat_u64 dqb_bsoftlimit;
+ compat_u64 dqb_curspace;
+ compat_u64 dqb_ihardlimit;
+ compat_u64 dqb_isoftlimit;
+ compat_u64 dqb_curinodes;
+ compat_u64 dqb_btime;
+ compat_u64 dqb_itime;
+ compat_uint_t dqb_valid;
+};
+
+struct compat_fs_qfilestat {
+ compat_u64 dqb_bhardlimit;
+ compat_u64 qfs_nblks;
+ compat_uint_t qfs_nextents;
+};
+
+struct compat_fs_quota_stat {
+ __s8 qs_version;
+ __u16 qs_flags;
+ __s8 qs_pad;
+ struct compat_fs_qfilestat qs_uquota;
+ struct compat_fs_qfilestat qs_gquota;
+ compat_uint_t qs_incoredqs;
+ compat_int_t qs_btimelimit;
+ compat_int_t qs_itimelimit;
+ compat_int_t qs_rtbtimelimit;
+ __u16 qs_bwarnlimit;
+ __u16 qs_iwarnlimit;
+};
#include <linux/types.h>
#include <linux/writeback.h>
#include <linux/nospec.h>
+#include "compat.h"
static int check_quotactl_permission(struct super_block *sb, int type, int cmd,
qid_t id)
if (ret)
return ret;
copy_to_if_dqblk(&idq, &fdq);
- if (copy_to_user(addr, &idq, sizeof(idq)))
- return -EFAULT;
+
+ if (compat_need_64bit_alignment_fixup()) {
+ struct compat_if_dqblk __user *compat_dqblk = addr;
+
+ if (copy_to_user(compat_dqblk, &idq, sizeof(*compat_dqblk)))
+ return -EFAULT;
+ if (put_user(idq.dqb_valid, &compat_dqblk->dqb_valid))
+ return -EFAULT;
+ } else {
+ if (copy_to_user(addr, &idq, sizeof(idq)))
+ return -EFAULT;
+ }
return 0;
}
struct if_dqblk idq;
struct kqid qid;
- if (copy_from_user(&idq, addr, sizeof(idq)))
- return -EFAULT;
+ if (compat_need_64bit_alignment_fixup()) {
+ struct compat_if_dqblk __user *compat_dqblk = addr;
+
+ if (copy_from_user(&idq, compat_dqblk, sizeof(*compat_dqblk)) ||
+ get_user(idq.dqb_valid, &compat_dqblk->dqb_valid))
+ return -EFAULT;
+ } else {
+ if (copy_from_user(&idq, addr, sizeof(idq)))
+ return -EFAULT;
+ }
if (!sb->s_qcop->set_dqblk)
return -ENOSYS;
qid = make_kqid(current_user_ns(), type, id);
return 0;
}
+static int compat_copy_fs_qfilestat(struct compat_fs_qfilestat __user *to,
+ struct fs_qfilestat *from)
+{
+ if (copy_to_user(to, from, sizeof(*to)) ||
+ put_user(from->qfs_nextents, &to->qfs_nextents))
+ return -EFAULT;
+ return 0;
+}
+
+static int compat_copy_fs_quota_stat(struct compat_fs_quota_stat __user *to,
+ struct fs_quota_stat *from)
+{
+ if (put_user(from->qs_version, &to->qs_version) ||
+ put_user(from->qs_flags, &to->qs_flags) ||
+ put_user(from->qs_pad, &to->qs_pad) ||
+ compat_copy_fs_qfilestat(&to->qs_uquota, &from->qs_uquota) ||
+ compat_copy_fs_qfilestat(&to->qs_gquota, &from->qs_gquota) ||
+ put_user(from->qs_incoredqs, &to->qs_incoredqs) ||
+ put_user(from->qs_btimelimit, &to->qs_btimelimit) ||
+ put_user(from->qs_itimelimit, &to->qs_itimelimit) ||
+ put_user(from->qs_rtbtimelimit, &to->qs_rtbtimelimit) ||
+ put_user(from->qs_bwarnlimit, &to->qs_bwarnlimit) ||
+ put_user(from->qs_iwarnlimit, &to->qs_iwarnlimit))
+ return -EFAULT;
+ return 0;
+}
+
static int quota_getxstate(struct super_block *sb, int type, void __user *addr)
{
struct fs_quota_stat fqs;
if (!sb->s_qcop->get_state)
return -ENOSYS;
ret = quota_getstate(sb, type, &fqs);
- if (!ret && copy_to_user(addr, &fqs, sizeof(fqs)))
+ if (ret)
+ return ret;
+
+ if (compat_need_64bit_alignment_fixup())
+ return compat_copy_fs_quota_stat(addr, &fqs);
+ if (copy_to_user(addr, &fqs, sizeof(fqs)))
return -EFAULT;
- return ret;
+ return 0;
}
static int quota_getstatev(struct super_block *sb, int type,
* calls. Maybe we need to add the process quotas etc. in the future,
* but we probably should use rlimits for that.
*/
-int kernel_quotactl(unsigned int cmd, const char __user *special,
- qid_t id, void __user *addr)
+SYSCALL_DEFINE4(quotactl, unsigned int, cmd, const char __user *, special,
+ qid_t, id, void __user *, addr)
{
uint cmds, type;
struct super_block *sb = NULL;
path_put(pathp);
return ret;
}
-
-SYSCALL_DEFINE4(quotactl, unsigned int, cmd, const char __user *, special,
- qid_t, id, void __user *, addr)
-{
- return kernel_quotactl(cmd, special, id, addr);
-}
typedef u32 compat_uptr_t;
typedef u32 compat_aio_context_t;
+#ifdef CONFIG_COMPAT_FOR_U64_ALIGNMENT
+typedef s64 __attribute__((aligned(4))) compat_s64;
+typedef u64 __attribute__((aligned(4))) compat_u64;
+#else
+typedef s64 compat_s64;
+typedef u64 compat_u64;
+#endif
+
#endif
#endif /* CONFIG_COMPAT */
+/*
+ * Some legacy ABIs like the i386 one use less than natural alignment for 64-bit
+ * types, and will need special compat treatment for that. Most architectures
+ * don't need that special handling even for compat syscalls.
+ */
+#ifndef compat_need_64bit_alignment_fixup
+#define compat_need_64bit_alignment_fixup() false
+#endif
+
/*
* A pointer passed in from user mode. This should not
* be used for syscall parameters, just declare them
(ia->ia_valid & ATTR_GID && !gid_eq(ia->ia_gid, inode->i_gid));
}
-int kernel_quotactl(unsigned int cmd, const char __user *special,
- qid_t id, void __user *addr);
-
#if defined(CONFIG_QUOTA)
#define quota_error(sb, fmt, args...) \
/* x86 */
COND_SYSCALL(vm86old);
COND_SYSCALL(modify_ldt);
-COND_SYSCALL_COMPAT(quotactl32);
COND_SYSCALL(vm86);
COND_SYSCALL(kexec_file_load);
projects / linux-2.6-block.git / commitdiff