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fs/compat.c
37.2 KB
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/* * linux/fs/compat.c * * Kernel compatibililty routines for e.g. 32 bit syscall support * on 64 bit kernels. * * Copyright (C) 2002 Stephen Rothwell, IBM Corporation * Copyright (C) 1997-2000 Jakub Jelinek (jakub@redhat.com) * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be) * Copyright (C) 2001,2002 Andi Kleen, SuSE Labs |
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* Copyright (C) 2003 Pavel Machek (pavel@ucw.cz) |
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* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ |
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#include <linux/stddef.h> |
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#include <linux/kernel.h> |
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#include <linux/linkage.h> #include <linux/compat.h> #include <linux/errno.h> #include <linux/time.h> #include <linux/fs.h> #include <linux/fcntl.h> #include <linux/namei.h> #include <linux/file.h> |
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#include <linux/fdtable.h> |
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#include <linux/vfs.h> |
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#include <linux/ioctl.h> #include <linux/init.h> |
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#include <linux/ncp_mount.h> |
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#include <linux/nfs4_mount.h> |
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#include <linux/syscalls.h> #include <linux/ctype.h> |
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#include <linux/dirent.h> |
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#include <linux/fsnotify.h> |
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#include <linux/highuid.h> |
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#include <linux/personality.h> #include <linux/rwsem.h> |
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#include <linux/tsacct_kern.h> |
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#include <linux/security.h> |
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#include <linux/highmem.h> |
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#include <linux/signal.h> |
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#include <linux/poll.h> |
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#include <linux/mm.h> |
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#include <linux/fs_struct.h> |
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#include <linux/slab.h> |
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#include <linux/pagemap.h> |
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#include <linux/aio.h> |
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#include <asm/uaccess.h> #include <asm/mmu_context.h> #include <asm/ioctls.h> |
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#include "internal.h" |
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int compat_log = 1; int compat_printk(const char *fmt, ...) { va_list ap; int ret; if (!compat_log) return 0; va_start(ap, fmt); ret = vprintk(fmt, ap); va_end(ap); return ret; } |
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/* * Not all architectures have sys_utime, so implement this in terms * of sys_utimes. */ |
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COMPAT_SYSCALL_DEFINE2(utime, const char __user *, filename, struct compat_utimbuf __user *, t) |
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{ |
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struct timespec tv[2]; |
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if (t) { if (get_user(tv[0].tv_sec, &t->actime) || get_user(tv[1].tv_sec, &t->modtime)) return -EFAULT; |
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tv[0].tv_nsec = 0; tv[1].tv_nsec = 0; |
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} |
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return do_utimes(AT_FDCWD, filename, t ? tv : NULL, 0); } |
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COMPAT_SYSCALL_DEFINE4(utimensat, unsigned int, dfd, const char __user *, filename, struct compat_timespec __user *, t, int, flags) |
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{ struct timespec tv[2]; if (t) { |
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if (compat_get_timespec(&tv[0], &t[0]) || compat_get_timespec(&tv[1], &t[1])) |
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return -EFAULT; |
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if (tv[0].tv_nsec == UTIME_OMIT && tv[1].tv_nsec == UTIME_OMIT) return 0; } return do_utimes(dfd, filename, t ? tv : NULL, flags); |
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} |
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COMPAT_SYSCALL_DEFINE3(futimesat, unsigned int, dfd, const char __user *, filename, struct compat_timeval __user *, t) |
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{ |
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struct timespec tv[2]; |
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if (t) { |
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if (get_user(tv[0].tv_sec, &t[0].tv_sec) || |
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get_user(tv[0].tv_nsec, &t[0].tv_usec) || |
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get_user(tv[1].tv_sec, &t[1].tv_sec) || |
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get_user(tv[1].tv_nsec, &t[1].tv_usec)) |
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return -EFAULT; |
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if (tv[0].tv_nsec >= 1000000 || tv[0].tv_nsec < 0 || tv[1].tv_nsec >= 1000000 || tv[1].tv_nsec < 0) return -EINVAL; tv[0].tv_nsec *= 1000; tv[1].tv_nsec *= 1000; |
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} |
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return do_utimes(dfd, filename, t ? tv : NULL, 0); |
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} |
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COMPAT_SYSCALL_DEFINE2(utimes, const char __user *, filename, struct compat_timeval __user *, t) |
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{ return compat_sys_futimesat(AT_FDCWD, filename, t); |
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} |
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static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf) { |
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struct compat_stat tmp; |
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if (!old_valid_dev(stat->dev) || !old_valid_dev(stat->rdev)) return -EOVERFLOW; |
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memset(&tmp, 0, sizeof(tmp)); tmp.st_dev = old_encode_dev(stat->dev); tmp.st_ino = stat->ino; if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino) |
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return -EOVERFLOW; |
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tmp.st_mode = stat->mode; tmp.st_nlink = stat->nlink; if (tmp.st_nlink != stat->nlink) |
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return -EOVERFLOW; |
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SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid)); SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid)); |
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tmp.st_rdev = old_encode_dev(stat->rdev); if ((u64) stat->size > MAX_NON_LFS) return -EOVERFLOW; tmp.st_size = stat->size; tmp.st_atime = stat->atime.tv_sec; tmp.st_atime_nsec = stat->atime.tv_nsec; tmp.st_mtime = stat->mtime.tv_sec; tmp.st_mtime_nsec = stat->mtime.tv_nsec; tmp.st_ctime = stat->ctime.tv_sec; tmp.st_ctime_nsec = stat->ctime.tv_nsec; tmp.st_blocks = stat->blocks; tmp.st_blksize = stat->blksize; return copy_to_user(ubuf, &tmp, sizeof(tmp)) ? -EFAULT : 0; |
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} |
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COMPAT_SYSCALL_DEFINE2(newstat, const char __user *, filename, struct compat_stat __user *, statbuf) |
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{ struct kstat stat; |
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int error; |
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error = vfs_stat(filename, &stat); if (error) return error; return cp_compat_stat(&stat, statbuf); |
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} |
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COMPAT_SYSCALL_DEFINE2(newlstat, const char __user *, filename, struct compat_stat __user *, statbuf) |
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{ struct kstat stat; |
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int error; |
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error = vfs_lstat(filename, &stat); if (error) return error; return cp_compat_stat(&stat, statbuf); |
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} |
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#ifndef __ARCH_WANT_STAT64 |
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COMPAT_SYSCALL_DEFINE4(newfstatat, unsigned int, dfd, const char __user *, filename, struct compat_stat __user *, statbuf, int, flag) |
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{ struct kstat stat; |
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int error; |
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error = vfs_fstatat(dfd, filename, &stat, flag); if (error) return error; return cp_compat_stat(&stat, statbuf); |
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} |
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#endif |
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COMPAT_SYSCALL_DEFINE2(newfstat, unsigned int, fd, struct compat_stat __user *, statbuf) |
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{ struct kstat stat; int error = vfs_fstat(fd, &stat); if (!error) error = cp_compat_stat(&stat, statbuf); return error; } static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf) { if (sizeof ubuf->f_blocks == 4) { |
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if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail | kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL) |
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return -EOVERFLOW; /* f_files and f_ffree may be -1; it's okay * to stuff that into 32 bits */ if (kbuf->f_files != 0xffffffffffffffffULL && (kbuf->f_files & 0xffffffff00000000ULL)) return -EOVERFLOW; if (kbuf->f_ffree != 0xffffffffffffffffULL && (kbuf->f_ffree & 0xffffffff00000000ULL)) return -EOVERFLOW; } if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || __put_user(kbuf->f_type, &ubuf->f_type) || __put_user(kbuf->f_bsize, &ubuf->f_bsize) || __put_user(kbuf->f_blocks, &ubuf->f_blocks) || __put_user(kbuf->f_bfree, &ubuf->f_bfree) || __put_user(kbuf->f_bavail, &ubuf->f_bavail) || __put_user(kbuf->f_files, &ubuf->f_files) || __put_user(kbuf->f_ffree, &ubuf->f_ffree) || __put_user(kbuf->f_namelen, &ubuf->f_namelen) || __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || __put_user(kbuf->f_frsize, &ubuf->f_frsize) || |
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__put_user(kbuf->f_flags, &ubuf->f_flags) || __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare))) |
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return -EFAULT; return 0; } /* |
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* The following statfs calls are copies of code from fs/statfs.c and |
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* should be checked against those from time to time */ |
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COMPAT_SYSCALL_DEFINE2(statfs, const char __user *, pathname, struct compat_statfs __user *, buf) |
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{ |
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struct kstatfs tmp; int error = user_statfs(pathname, &tmp); if (!error) error = put_compat_statfs(buf, &tmp); |
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return error; } |
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COMPAT_SYSCALL_DEFINE2(fstatfs, unsigned int, fd, struct compat_statfs __user *, buf) |
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{ |
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struct kstatfs tmp; |
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int error = fd_statfs(fd, &tmp); |
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if (!error) error = put_compat_statfs(buf, &tmp); |
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return error; } static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf) { if (sizeof ubuf->f_blocks == 4) { |
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if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail | kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL) |
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return -EOVERFLOW; /* f_files and f_ffree may be -1; it's okay * to stuff that into 32 bits */ if (kbuf->f_files != 0xffffffffffffffffULL && (kbuf->f_files & 0xffffffff00000000ULL)) return -EOVERFLOW; if (kbuf->f_ffree != 0xffffffffffffffffULL && (kbuf->f_ffree & 0xffffffff00000000ULL)) return -EOVERFLOW; } if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || __put_user(kbuf->f_type, &ubuf->f_type) || __put_user(kbuf->f_bsize, &ubuf->f_bsize) || __put_user(kbuf->f_blocks, &ubuf->f_blocks) || __put_user(kbuf->f_bfree, &ubuf->f_bfree) || __put_user(kbuf->f_bavail, &ubuf->f_bavail) || __put_user(kbuf->f_files, &ubuf->f_files) || __put_user(kbuf->f_ffree, &ubuf->f_ffree) || __put_user(kbuf->f_namelen, &ubuf->f_namelen) || __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || |
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__put_user(kbuf->f_frsize, &ubuf->f_frsize) || __put_user(kbuf->f_flags, &ubuf->f_flags) || __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare))) |
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return -EFAULT; return 0; } |
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COMPAT_SYSCALL_DEFINE3(statfs64, const char __user *, pathname, compat_size_t, sz, struct compat_statfs64 __user *, buf) |
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{ |
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struct kstatfs tmp; |
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int error; if (sz != sizeof(*buf)) return -EINVAL; |
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error = user_statfs(pathname, &tmp); if (!error) error = put_compat_statfs64(buf, &tmp); |
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return error; } |
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COMPAT_SYSCALL_DEFINE3(fstatfs64, unsigned int, fd, compat_size_t, sz, struct compat_statfs64 __user *, buf) |
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{ |
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struct kstatfs tmp; int error; if (sz != sizeof(*buf)) return -EINVAL; |
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error = fd_statfs(fd, &tmp); |
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if (!error) error = put_compat_statfs64(buf, &tmp); |
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return error; } |
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/* * This is a copy of sys_ustat, just dealing with a structure layout. * Given how simple this syscall is that apporach is more maintainable * than the various conversion hacks. */ |
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COMPAT_SYSCALL_DEFINE2(ustat, unsigned, dev, struct compat_ustat __user *, u) |
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{ |
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struct compat_ustat tmp; struct kstatfs sbuf; |
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int err = vfs_ustat(new_decode_dev(dev), &sbuf); |
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if (err) return err; memset(&tmp, 0, sizeof(struct compat_ustat)); tmp.f_tfree = sbuf.f_bfree; tmp.f_tinode = sbuf.f_ffree; if (copy_to_user(u, &tmp, sizeof(struct compat_ustat))) return -EFAULT; return 0; } |
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static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) { if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || __get_user(kfl->l_type, &ufl->l_type) || __get_user(kfl->l_whence, &ufl->l_whence) || __get_user(kfl->l_start, &ufl->l_start) || __get_user(kfl->l_len, &ufl->l_len) || __get_user(kfl->l_pid, &ufl->l_pid)) return -EFAULT; return 0; } static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) { if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || __put_user(kfl->l_type, &ufl->l_type) || __put_user(kfl->l_whence, &ufl->l_whence) || __put_user(kfl->l_start, &ufl->l_start) || __put_user(kfl->l_len, &ufl->l_len) || __put_user(kfl->l_pid, &ufl->l_pid)) return -EFAULT; return 0; } #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64 static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) { if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || __get_user(kfl->l_type, &ufl->l_type) || __get_user(kfl->l_whence, &ufl->l_whence) || __get_user(kfl->l_start, &ufl->l_start) || __get_user(kfl->l_len, &ufl->l_len) || __get_user(kfl->l_pid, &ufl->l_pid)) return -EFAULT; return 0; } #endif #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64 static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) { if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || __put_user(kfl->l_type, &ufl->l_type) || __put_user(kfl->l_whence, &ufl->l_whence) || __put_user(kfl->l_start, &ufl->l_start) || __put_user(kfl->l_len, &ufl->l_len) || __put_user(kfl->l_pid, &ufl->l_pid)) return -EFAULT; return 0; } #endif |
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static unsigned int convert_fcntl_cmd(unsigned int cmd) { switch (cmd) { case F_GETLK64: return F_GETLK; case F_SETLK64: return F_SETLK; case F_SETLKW64: return F_SETLKW; } return cmd; } |
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COMPAT_SYSCALL_DEFINE3(fcntl64, unsigned int, fd, unsigned int, cmd, compat_ulong_t, arg) |
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{ mm_segment_t old_fs; struct flock f; long ret; |
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unsigned int conv_cmd; |
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switch (cmd) { case F_GETLK: case F_SETLK: case F_SETLKW: ret = get_compat_flock(&f, compat_ptr(arg)); if (ret != 0) break; old_fs = get_fs(); set_fs(KERNEL_DS); ret = sys_fcntl(fd, cmd, (unsigned long)&f); set_fs(old_fs); if (cmd == F_GETLK && ret == 0) { |
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/* GETLK was successful and we need to return the data... |
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* but it needs to fit in the compat structure. * l_start shouldn't be too big, unless the original * start + end is greater than COMPAT_OFF_T_MAX, in which * case the app was asking for trouble, so we return * -EOVERFLOW in that case. * l_len could be too big, in which case we just truncate it, * and only allow the app to see that part of the conflicting * lock that might make sense to it anyway */ if (f.l_start > COMPAT_OFF_T_MAX) |
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ret = -EOVERFLOW; |
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if (f.l_len > COMPAT_OFF_T_MAX) f.l_len = COMPAT_OFF_T_MAX; |
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if (ret == 0) ret = put_compat_flock(&f, compat_ptr(arg)); } break; case F_GETLK64: case F_SETLK64: case F_SETLKW64: |
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case F_OFD_GETLK: case F_OFD_SETLK: case F_OFD_SETLKW: |
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ret = get_compat_flock64(&f, compat_ptr(arg)); if (ret != 0) break; old_fs = get_fs(); set_fs(KERNEL_DS); |
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conv_cmd = convert_fcntl_cmd(cmd); ret = sys_fcntl(fd, conv_cmd, (unsigned long)&f); |
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set_fs(old_fs); |
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if ((conv_cmd == F_GETLK || conv_cmd == F_OFD_GETLK) && ret == 0) { |
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/* need to return lock information - see above for commentary */ if (f.l_start > COMPAT_LOFF_T_MAX) |
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ret = -EOVERFLOW; |
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if (f.l_len > COMPAT_LOFF_T_MAX) f.l_len = COMPAT_LOFF_T_MAX; |
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if (ret == 0) ret = put_compat_flock64(&f, compat_ptr(arg)); } break; default: ret = sys_fcntl(fd, cmd, arg); break; } return ret; } |
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COMPAT_SYSCALL_DEFINE3(fcntl, unsigned int, fd, unsigned int, cmd, compat_ulong_t, arg) |
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{ |
5d50ffd7c
|
472 473 474 475 |
switch (cmd) { case F_GETLK64: case F_SETLK64: case F_SETLKW64: |
0d3f7a2dd
|
476 477 478 |
case F_OFD_GETLK: case F_OFD_SETLK: case F_OFD_SETLKW: |
1da177e4c
|
479 |
return -EINVAL; |
5d50ffd7c
|
480 |
} |
1da177e4c
|
481 482 |
return compat_sys_fcntl64(fd, cmd, arg); } |
625b1d7e8
|
483 |
COMPAT_SYSCALL_DEFINE2(io_setup, unsigned, nr_reqs, u32 __user *, ctx32p) |
1da177e4c
|
484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 |
{ long ret; aio_context_t ctx64; mm_segment_t oldfs = get_fs(); if (unlikely(get_user(ctx64, ctx32p))) return -EFAULT; set_fs(KERNEL_DS); /* The __user pointer cast is valid because of the set_fs() */ ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64); set_fs(oldfs); /* truncating is ok because it's a user address */ if (!ret) ret = put_user((u32) ctx64, ctx32p); return ret; } |
932602e23
|
501 502 503 504 505 |
COMPAT_SYSCALL_DEFINE5(io_getevents, compat_aio_context_t, ctx_id, compat_long_t, min_nr, compat_long_t, nr, struct io_event __user *, events, struct compat_timespec __user *, timeout) |
1da177e4c
|
506 |
{ |
1da177e4c
|
507 508 |
struct timespec t; struct timespec __user *ut = NULL; |
1da177e4c
|
509 |
if (timeout) { |
81993e81a
|
510 |
if (compat_get_timespec(&t, timeout)) |
932602e23
|
511 |
return -EFAULT; |
1da177e4c
|
512 513 514 |
ut = compat_alloc_user_space(sizeof(*ut)); if (copy_to_user(ut, &t, sizeof(t)) ) |
932602e23
|
515 |
return -EFAULT; |
1da177e4c
|
516 |
} |
932602e23
|
517 |
return sys_io_getevents(ctx_id, min_nr, nr, events, ut); |
1da177e4c
|
518 |
} |
b83733639
|
519 520 521 522 523 524 |
/* A write operation does a read from user space and vice versa */ #define vrfy_dir(type) ((type) == READ ? VERIFY_WRITE : VERIFY_READ) ssize_t compat_rw_copy_check_uvector(int type, const struct compat_iovec __user *uvector, unsigned long nr_segs, unsigned long fast_segs, struct iovec *fast_pointer, |
ac34ebb3a
|
525 |
struct iovec **ret_pointer) |
b83733639
|
526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 |
{ compat_ssize_t tot_len; struct iovec *iov = *ret_pointer = fast_pointer; ssize_t ret = 0; int seg; /* * SuS says "The readv() function *may* fail if the iovcnt argument * was less than or equal to 0, or greater than {IOV_MAX}. Linux has * traditionally returned zero for zero segments, so... */ if (nr_segs == 0) goto out; ret = -EINVAL; if (nr_segs > UIO_MAXIOV || nr_segs < 0) goto out; if (nr_segs > fast_segs) { ret = -ENOMEM; iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL); |
6a5640f10
|
546 |
if (iov == NULL) |
b83733639
|
547 |
goto out; |
b83733639
|
548 549 |
} *ret_pointer = iov; |
8aec0f5d4
|
550 551 552 |
ret = -EFAULT; if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector))) goto out; |
b83733639
|
553 554 555 |
/* * Single unix specification: * We should -EINVAL if an element length is not >= 0 and fitting an |
435f49a51
|
556 |
* ssize_t. |
b83733639
|
557 |
* |
435f49a51
|
558 559 |
* In Linux, the total length is limited to MAX_RW_COUNT, there is * no overflow possibility. |
b83733639
|
560 561 562 563 |
*/ tot_len = 0; ret = -EINVAL; for (seg = 0; seg < nr_segs; seg++) { |
b83733639
|
564 565 566 567 568 569 570 571 572 573 |
compat_uptr_t buf; compat_ssize_t len; if (__get_user(len, &uvector->iov_len) || __get_user(buf, &uvector->iov_base)) { ret = -EFAULT; goto out; } if (len < 0) /* size_t not fitting in compat_ssize_t .. */ goto out; |
ac34ebb3a
|
574 |
if (type >= 0 && |
fcf634098
|
575 |
!access_ok(vrfy_dir(type), compat_ptr(buf), len)) { |
b83733639
|
576 577 578 |
ret = -EFAULT; goto out; } |
435f49a51
|
579 580 581 |
if (len > MAX_RW_COUNT - tot_len) len = MAX_RW_COUNT - tot_len; tot_len += len; |
b83733639
|
582 583 584 585 586 587 588 589 590 591 |
iov->iov_base = compat_ptr(buf); iov->iov_len = (compat_size_t) len; uvector++; iov++; } ret = tot_len; out: return ret; } |
1da177e4c
|
592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 |
static inline long copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64) { compat_uptr_t uptr; int i; for (i = 0; i < nr; ++i) { if (get_user(uptr, ptr32 + i)) return -EFAULT; if (put_user(compat_ptr(uptr), ptr64 + i)) return -EFAULT; } return 0; } #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *)) |
932602e23
|
608 609 |
COMPAT_SYSCALL_DEFINE3(io_submit, compat_aio_context_t, ctx_id, int, nr, u32 __user *, iocb) |
1da177e4c
|
610 611 612 613 614 615 616 617 618 619 620 621 622 |
{ struct iocb __user * __user *iocb64; long ret; if (unlikely(nr < 0)) return -EINVAL; if (nr > MAX_AIO_SUBMITS) nr = MAX_AIO_SUBMITS; iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64)); ret = copy_iocb(nr, iocb, iocb64); if (!ret) |
9d85cba71
|
623 |
ret = do_io_submit(ctx_id, nr, iocb64, 1); |
1da177e4c
|
624 625 626 627 628 629 |
return ret; } struct compat_ncp_mount_data { compat_int_t version; compat_uint_t ncp_fd; |
202e5979a
|
630 |
__compat_uid_t mounted_uid; |
1da177e4c
|
631 632 633 634 635 |
compat_pid_t wdog_pid; unsigned char mounted_vol[NCP_VOLNAME_LEN + 1]; compat_uint_t time_out; compat_uint_t retry_count; compat_uint_t flags; |
202e5979a
|
636 637 |
__compat_uid_t uid; __compat_gid_t gid; |
1da177e4c
|
638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 |
compat_mode_t file_mode; compat_mode_t dir_mode; }; struct compat_ncp_mount_data_v4 { compat_int_t version; compat_ulong_t flags; compat_ulong_t mounted_uid; compat_long_t wdog_pid; compat_uint_t ncp_fd; compat_uint_t time_out; compat_uint_t retry_count; compat_ulong_t uid; compat_ulong_t gid; compat_ulong_t file_mode; compat_ulong_t dir_mode; }; static void *do_ncp_super_data_conv(void *raw_data) { int version = *(unsigned int *)raw_data; if (version == 3) { struct compat_ncp_mount_data *c_n = raw_data; struct ncp_mount_data *n = raw_data; n->dir_mode = c_n->dir_mode; n->file_mode = c_n->file_mode; n->gid = c_n->gid; n->uid = c_n->uid; memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int))); n->wdog_pid = c_n->wdog_pid; n->mounted_uid = c_n->mounted_uid; } else if (version == 4) { struct compat_ncp_mount_data_v4 *c_n = raw_data; struct ncp_mount_data_v4 *n = raw_data; n->dir_mode = c_n->dir_mode; n->file_mode = c_n->file_mode; n->gid = c_n->gid; n->uid = c_n->uid; n->retry_count = c_n->retry_count; n->time_out = c_n->time_out; n->ncp_fd = c_n->ncp_fd; n->wdog_pid = c_n->wdog_pid; n->mounted_uid = c_n->mounted_uid; n->flags = c_n->flags; } else if (version != 5) { return NULL; } return raw_data; } |
1da177e4c
|
691 |
|
9a9947bf7
|
692 693 |
struct compat_nfs_string { compat_uint_t len; |
5fc3e624a
|
694 |
compat_uptr_t data; |
9a9947bf7
|
695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 |
}; static inline void compat_nfs_string(struct nfs_string *dst, struct compat_nfs_string *src) { dst->data = compat_ptr(src->data); dst->len = src->len; } struct compat_nfs4_mount_data_v1 { compat_int_t version; compat_int_t flags; compat_int_t rsize; compat_int_t wsize; compat_int_t timeo; compat_int_t retrans; compat_int_t acregmin; compat_int_t acregmax; compat_int_t acdirmin; compat_int_t acdirmax; struct compat_nfs_string client_addr; struct compat_nfs_string mnt_path; struct compat_nfs_string hostname; compat_uint_t host_addrlen; |
5fc3e624a
|
719 |
compat_uptr_t host_addr; |
9a9947bf7
|
720 721 |
compat_int_t proto; compat_int_t auth_flavourlen; |
5fc3e624a
|
722 |
compat_uptr_t auth_flavours; |
9a9947bf7
|
723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 |
}; static int do_nfs4_super_data_conv(void *raw_data) { int version = *(compat_uint_t *) raw_data; if (version == 1) { struct compat_nfs4_mount_data_v1 *raw = raw_data; struct nfs4_mount_data *real = raw_data; /* copy the fields backwards */ real->auth_flavours = compat_ptr(raw->auth_flavours); real->auth_flavourlen = raw->auth_flavourlen; real->proto = raw->proto; real->host_addr = compat_ptr(raw->host_addr); real->host_addrlen = raw->host_addrlen; compat_nfs_string(&real->hostname, &raw->hostname); compat_nfs_string(&real->mnt_path, &raw->mnt_path); compat_nfs_string(&real->client_addr, &raw->client_addr); real->acdirmax = raw->acdirmax; real->acdirmin = raw->acdirmin; real->acregmax = raw->acregmax; real->acregmin = raw->acregmin; real->retrans = raw->retrans; real->timeo = raw->timeo; real->wsize = raw->wsize; real->rsize = raw->rsize; real->flags = raw->flags; real->version = raw->version; } |
9a9947bf7
|
753 754 755 |
return 0; } |
1da177e4c
|
756 |
#define NCPFS_NAME "ncpfs" |
9a9947bf7
|
757 |
#define NFS4_NAME "nfs4" |
1da177e4c
|
758 |
|
932602e23
|
759 760 761 762 |
COMPAT_SYSCALL_DEFINE5(mount, const char __user *, dev_name, const char __user *, dir_name, const char __user *, type, compat_ulong_t, flags, const void __user *, data) |
1da177e4c
|
763 |
{ |
eca6f534e
|
764 |
char *kernel_type; |
1da177e4c
|
765 |
unsigned long data_page; |
eca6f534e
|
766 |
char *kernel_dev; |
1da177e4c
|
767 |
int retval; |
b8850d1fa
|
768 769 770 |
kernel_type = copy_mount_string(type); retval = PTR_ERR(kernel_type); if (IS_ERR(kernel_type)) |
1da177e4c
|
771 |
goto out; |
b8850d1fa
|
772 773 774 |
kernel_dev = copy_mount_string(dev_name); retval = PTR_ERR(kernel_dev); if (IS_ERR(kernel_dev)) |
5e6123f34
|
775 |
goto out1; |
1da177e4c
|
776 |
|
eca6f534e
|
777 |
retval = copy_mount_options(data, &data_page); |
1da177e4c
|
778 |
if (retval < 0) |
5e6123f34
|
779 |
goto out2; |
1da177e4c
|
780 781 |
retval = -EINVAL; |
eca6f534e
|
782 |
if (kernel_type && data_page) { |
2116b7a47
|
783 |
if (!strcmp(kernel_type, NCPFS_NAME)) { |
1da177e4c
|
784 |
do_ncp_super_data_conv((void *)data_page); |
eca6f534e
|
785 |
} else if (!strcmp(kernel_type, NFS4_NAME)) { |
9a9947bf7
|
786 |
if (do_nfs4_super_data_conv((void *) data_page)) |
5e6123f34
|
787 |
goto out3; |
1da177e4c
|
788 789 |
} } |
5e6123f34
|
790 |
retval = do_mount(kernel_dev, dir_name, kernel_type, |
1da177e4c
|
791 |
flags, (void*)data_page); |
1da177e4c
|
792 |
|
1da177e4c
|
793 |
out3: |
5e6123f34
|
794 |
free_page(data_page); |
1da177e4c
|
795 |
out2: |
5e6123f34
|
796 |
kfree(kernel_dev); |
1da177e4c
|
797 |
out1: |
eca6f534e
|
798 |
kfree(kernel_type); |
1da177e4c
|
799 800 801 |
out: return retval; } |
1da177e4c
|
802 803 804 805 806 807 808 809 |
struct compat_old_linux_dirent { compat_ulong_t d_ino; compat_ulong_t d_offset; unsigned short d_namlen; char d_name[1]; }; struct compat_readdir_callback { |
5c0ba4e07
|
810 |
struct dir_context ctx; |
1da177e4c
|
811 812 813 |
struct compat_old_linux_dirent __user *dirent; int result; }; |
ac7576f4b
|
814 815 816 |
static int compat_fillonedir(struct dir_context *ctx, const char *name, int namlen, loff_t offset, u64 ino, unsigned int d_type) |
1da177e4c
|
817 |
{ |
ac7576f4b
|
818 819 |
struct compat_readdir_callback *buf = container_of(ctx, struct compat_readdir_callback, ctx); |
1da177e4c
|
820 |
struct compat_old_linux_dirent __user *dirent; |
afefdbb28
|
821 |
compat_ulong_t d_ino; |
1da177e4c
|
822 823 824 |
if (buf->result) return -EINVAL; |
afefdbb28
|
825 |
d_ino = ino; |
8f3f655da
|
826 827 |
if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { buf->result = -EOVERFLOW; |
afefdbb28
|
828 |
return -EOVERFLOW; |
8f3f655da
|
829 |
} |
1da177e4c
|
830 831 832 833 834 835 |
buf->result++; dirent = buf->dirent; if (!access_ok(VERIFY_WRITE, dirent, (unsigned long)(dirent->d_name + namlen + 1) - (unsigned long)dirent)) goto efault; |
afefdbb28
|
836 |
if ( __put_user(d_ino, &dirent->d_ino) || |
1da177e4c
|
837 838 839 840 841 842 843 844 845 846 |
__put_user(offset, &dirent->d_offset) || __put_user(namlen, &dirent->d_namlen) || __copy_to_user(dirent->d_name, name, namlen) || __put_user(0, dirent->d_name + namlen)) goto efault; return 0; efault: buf->result = -EFAULT; return -EFAULT; } |
625b1d7e8
|
847 848 |
COMPAT_SYSCALL_DEFINE3(old_readdir, unsigned int, fd, struct compat_old_linux_dirent __user *, dirent, unsigned int, count) |
1da177e4c
|
849 850 |
{ int error; |
2903ff019
|
851 |
struct fd f = fdget(fd); |
ac6614b76
|
852 853 854 855 |
struct compat_readdir_callback buf = { .ctx.actor = compat_fillonedir, .dirent = dirent }; |
1da177e4c
|
856 |
|
2903ff019
|
857 |
if (!f.file) |
863ced7fe
|
858 |
return -EBADF; |
1da177e4c
|
859 |
|
5c0ba4e07
|
860 |
error = iterate_dir(f.file, &buf.ctx); |
53c9c5c0e
|
861 |
if (buf.result) |
1da177e4c
|
862 |
error = buf.result; |
2903ff019
|
863 |
fdput(f); |
1da177e4c
|
864 865 866 867 868 869 870 871 872 873 874 |
return error; } struct compat_linux_dirent { compat_ulong_t d_ino; compat_ulong_t d_off; unsigned short d_reclen; char d_name[1]; }; struct compat_getdents_callback { |
5c0ba4e07
|
875 |
struct dir_context ctx; |
1da177e4c
|
876 877 878 879 880 |
struct compat_linux_dirent __user *current_dir; struct compat_linux_dirent __user *previous; int count; int error; }; |
ac7576f4b
|
881 |
static int compat_filldir(struct dir_context *ctx, const char *name, int namlen, |
afefdbb28
|
882 |
loff_t offset, u64 ino, unsigned int d_type) |
1da177e4c
|
883 884 |
{ struct compat_linux_dirent __user * dirent; |
ac7576f4b
|
885 886 |
struct compat_getdents_callback *buf = container_of(ctx, struct compat_getdents_callback, ctx); |
afefdbb28
|
887 |
compat_ulong_t d_ino; |
85c9fe8fc
|
888 889 |
int reclen = ALIGN(offsetof(struct compat_linux_dirent, d_name) + namlen + 2, sizeof(compat_long_t)); |
1da177e4c
|
890 891 892 893 |
buf->error = -EINVAL; /* only used if we fail.. */ if (reclen > buf->count) return -EINVAL; |
afefdbb28
|
894 |
d_ino = ino; |
8f3f655da
|
895 896 |
if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { buf->error = -EOVERFLOW; |
afefdbb28
|
897 |
return -EOVERFLOW; |
8f3f655da
|
898 |
} |
1da177e4c
|
899 900 901 902 903 904 |
dirent = buf->previous; if (dirent) { if (__put_user(offset, &dirent->d_off)) goto efault; } dirent = buf->current_dir; |
afefdbb28
|
905 |
if (__put_user(d_ino, &dirent->d_ino)) |
1da177e4c
|
906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 |
goto efault; if (__put_user(reclen, &dirent->d_reclen)) goto efault; if (copy_to_user(dirent->d_name, name, namlen)) goto efault; if (__put_user(0, dirent->d_name + namlen)) goto efault; if (__put_user(d_type, (char __user *) dirent + reclen - 1)) goto efault; buf->previous = dirent; dirent = (void __user *)dirent + reclen; buf->current_dir = dirent; buf->count -= reclen; return 0; efault: buf->error = -EFAULT; return -EFAULT; } |
625b1d7e8
|
924 925 |
COMPAT_SYSCALL_DEFINE3(getdents, unsigned int, fd, struct compat_linux_dirent __user *, dirent, unsigned int, count) |
1da177e4c
|
926 |
{ |
2903ff019
|
927 |
struct fd f; |
1da177e4c
|
928 |
struct compat_linux_dirent __user * lastdirent; |
ac6614b76
|
929 930 931 932 933 |
struct compat_getdents_callback buf = { .ctx.actor = compat_filldir, .current_dir = dirent, .count = count }; |
1da177e4c
|
934 |
int error; |
1da177e4c
|
935 |
if (!access_ok(VERIFY_WRITE, dirent, count)) |
863ced7fe
|
936 |
return -EFAULT; |
1da177e4c
|
937 |
|
2903ff019
|
938 939 |
f = fdget(fd); if (!f.file) |
863ced7fe
|
940 |
return -EBADF; |
1da177e4c
|
941 |
|
5c0ba4e07
|
942 |
error = iterate_dir(f.file, &buf.ctx); |
53c9c5c0e
|
943 944 |
if (error >= 0) error = buf.error; |
1da177e4c
|
945 946 |
lastdirent = buf.previous; if (lastdirent) { |
bb6f619b3
|
947 |
if (put_user(buf.ctx.pos, &lastdirent->d_off)) |
1da177e4c
|
948 949 950 951 |
error = -EFAULT; else error = count - buf.count; } |
2903ff019
|
952 |
fdput(f); |
1da177e4c
|
953 954 |
return error; } |
0473c9b5f
|
955 |
#ifdef __ARCH_WANT_COMPAT_SYS_GETDENTS64 |
1da177e4c
|
956 957 |
struct compat_getdents_callback64 { |
5c0ba4e07
|
958 |
struct dir_context ctx; |
1da177e4c
|
959 960 961 962 963 |
struct linux_dirent64 __user *current_dir; struct linux_dirent64 __user *previous; int count; int error; }; |
ac7576f4b
|
964 965 966 |
static int compat_filldir64(struct dir_context *ctx, const char *name, int namlen, loff_t offset, u64 ino, unsigned int d_type) |
1da177e4c
|
967 968 |
{ struct linux_dirent64 __user *dirent; |
ac7576f4b
|
969 970 |
struct compat_getdents_callback64 *buf = container_of(ctx, struct compat_getdents_callback64, ctx); |
85c9fe8fc
|
971 972 |
int reclen = ALIGN(offsetof(struct linux_dirent64, d_name) + namlen + 1, sizeof(u64)); |
1da177e4c
|
973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 |
u64 off; buf->error = -EINVAL; /* only used if we fail.. */ if (reclen > buf->count) return -EINVAL; dirent = buf->previous; if (dirent) { if (__put_user_unaligned(offset, &dirent->d_off)) goto efault; } dirent = buf->current_dir; if (__put_user_unaligned(ino, &dirent->d_ino)) goto efault; off = 0; if (__put_user_unaligned(off, &dirent->d_off)) goto efault; if (__put_user(reclen, &dirent->d_reclen)) goto efault; if (__put_user(d_type, &dirent->d_type)) goto efault; if (copy_to_user(dirent->d_name, name, namlen)) goto efault; if (__put_user(0, dirent->d_name + namlen)) goto efault; buf->previous = dirent; dirent = (void __user *)dirent + reclen; buf->current_dir = dirent; buf->count -= reclen; return 0; efault: buf->error = -EFAULT; return -EFAULT; } |
625b1d7e8
|
1007 1008 |
COMPAT_SYSCALL_DEFINE3(getdents64, unsigned int, fd, struct linux_dirent64 __user *, dirent, unsigned int, count) |
1da177e4c
|
1009 |
{ |
2903ff019
|
1010 |
struct fd f; |
1da177e4c
|
1011 |
struct linux_dirent64 __user * lastdirent; |
ac6614b76
|
1012 1013 1014 1015 1016 |
struct compat_getdents_callback64 buf = { .ctx.actor = compat_filldir64, .current_dir = dirent, .count = count }; |
1da177e4c
|
1017 |
int error; |
1da177e4c
|
1018 |
if (!access_ok(VERIFY_WRITE, dirent, count)) |
863ced7fe
|
1019 |
return -EFAULT; |
1da177e4c
|
1020 |
|
2903ff019
|
1021 1022 |
f = fdget(fd); if (!f.file) |
863ced7fe
|
1023 |
return -EBADF; |
1da177e4c
|
1024 |
|
5c0ba4e07
|
1025 |
error = iterate_dir(f.file, &buf.ctx); |
53c9c5c0e
|
1026 1027 |
if (error >= 0) error = buf.error; |
1da177e4c
|
1028 1029 |
lastdirent = buf.previous; if (lastdirent) { |
bb6f619b3
|
1030 |
typeof(lastdirent->d_off) d_off = buf.ctx.pos; |
7116e994b
|
1031 |
if (__put_user_unaligned(d_off, &lastdirent->d_off)) |
53c9c5c0e
|
1032 1033 1034 |
error = -EFAULT; else error = count - buf.count; |
1da177e4c
|
1035 |
} |
2903ff019
|
1036 |
fdput(f); |
1da177e4c
|
1037 1038 |
return error; } |
0473c9b5f
|
1039 |
#endif /* __ARCH_WANT_COMPAT_SYS_GETDENTS64 */ |
1da177e4c
|
1040 |
|
1da177e4c
|
1041 |
/* |
e922efc34
|
1042 1043 1044 |
* Exactly like fs/open.c:sys_open(), except that it doesn't set the * O_LARGEFILE flag. */ |
f482e1b4a
|
1045 |
COMPAT_SYSCALL_DEFINE3(open, const char __user *, filename, int, flags, umode_t, mode) |
e922efc34
|
1046 |
{ |
5590ff0d5
|
1047 1048 1049 1050 1051 1052 1053 |
return do_sys_open(AT_FDCWD, filename, flags, mode); } /* * Exactly like fs/open.c:sys_openat(), except that it doesn't set the * O_LARGEFILE flag. */ |
f482e1b4a
|
1054 |
COMPAT_SYSCALL_DEFINE4(openat, int, dfd, const char __user *, filename, int, flags, umode_t, mode) |
5590ff0d5
|
1055 1056 |
{ return do_sys_open(dfd, filename, flags, mode); |
e922efc34
|
1057 |
} |
1da177e4c
|
1058 |
#define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t)) |
b773ad40a
|
1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 |
static int poll_select_copy_remaining(struct timespec *end_time, void __user *p, int timeval, int ret) { struct timespec ts; if (!p) return ret; if (current->personality & STICKY_TIMEOUTS) goto sticky; /* No update for zero timeout */ if (!end_time->tv_sec && !end_time->tv_nsec) return ret; ktime_get_ts(&ts); ts = timespec_sub(*end_time, ts); if (ts.tv_sec < 0) ts.tv_sec = ts.tv_nsec = 0; if (timeval) { struct compat_timeval rtv; rtv.tv_sec = ts.tv_sec; rtv.tv_usec = ts.tv_nsec / NSEC_PER_USEC; if (!copy_to_user(p, &rtv, sizeof(rtv))) return ret; } else { struct compat_timespec rts; rts.tv_sec = ts.tv_sec; rts.tv_nsec = ts.tv_nsec; if (!copy_to_user(p, &rts, sizeof(rts))) return ret; } /* * If an application puts its timeval in read-only memory, we * don't want the Linux-specific update to the timeval to * cause a fault after the select has completed * successfully. However, because we're not updating the * timeval, we can't restart the system call. */ sticky: if (ret == -ERESTARTNOHAND) ret = -EINTR; return ret; } |
1da177e4c
|
1109 1110 1111 1112 |
/* * Ooo, nasty. We need here to frob 32-bit unsigned longs to * 64-bit unsigned longs. */ |
858119e15
|
1113 |
static |
1da177e4c
|
1114 1115 1116 |
int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, unsigned long *fdset) { |
022a16924
|
1117 |
nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); |
1da177e4c
|
1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 |
if (ufdset) { unsigned long odd; if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t))) return -EFAULT; odd = nr & 1UL; nr &= ~1UL; while (nr) { unsigned long h, l; |
7116e994b
|
1128 1129 |
if (__get_user(l, ufdset) || __get_user(h, ufdset+1)) return -EFAULT; |
1da177e4c
|
1130 1131 1132 1133 |
ufdset += 2; *fdset++ = h << 32 | l; nr -= 2; } |
7116e994b
|
1134 1135 |
if (odd && __get_user(*fdset, ufdset)) return -EFAULT; |
1da177e4c
|
1136 1137 1138 1139 1140 1141 1142 1143 1144 |
} else { /* Tricky, must clear full unsigned long in the * kernel fdset at the end, this makes sure that * actually happens. */ memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t)); } return 0; } |
858119e15
|
1145 |
static |
7116e994b
|
1146 1147 |
int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, unsigned long *fdset) |
1da177e4c
|
1148 1149 |
{ unsigned long odd; |
022a16924
|
1150 |
nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); |
1da177e4c
|
1151 1152 |
if (!ufdset) |
7116e994b
|
1153 |
return 0; |
1da177e4c
|
1154 1155 1156 1157 1158 1159 1160 |
odd = nr & 1UL; nr &= ~1UL; while (nr) { unsigned long h, l; l = *fdset++; h = l >> 32; |
7116e994b
|
1161 1162 |
if (__put_user(l, ufdset) || __put_user(h, ufdset+1)) return -EFAULT; |
1da177e4c
|
1163 1164 1165 |
ufdset += 2; nr -= 2; } |
7116e994b
|
1166 1167 1168 |
if (odd && __put_user(*fdset, ufdset)) return -EFAULT; return 0; |
1da177e4c
|
1169 1170 1171 1172 1173 1174 1175 |
} /* * This is a virtual copy of sys_select from fs/select.c and probably * should be compared to it from time to time */ |
1da177e4c
|
1176 1177 1178 1179 1180 1181 1182 1183 1184 |
/* * We can actually return ERESTARTSYS instead of EINTR, but I'd * like to be certain this leads to no problems. So I return * EINTR just for safety. * * Update: ERESTARTSYS breaks at least the xview clock binary, so * I'm trying ERESTARTNOHAND which restart only when you want to. */ |
9f72949f6
|
1185 |
int compat_core_sys_select(int n, compat_ulong_t __user *inp, |
8ff3e8e85
|
1186 1187 |
compat_ulong_t __user *outp, compat_ulong_t __user *exp, struct timespec *end_time) |
1da177e4c
|
1188 1189 |
{ fd_set_bits fds; |
6087b2dab
|
1190 |
void *bits; |
bbea9f696
|
1191 |
int size, max_fds, ret = -EINVAL; |
a4531edd7
|
1192 |
struct fdtable *fdt; |
6087b2dab
|
1193 |
long stack_fds[SELECT_STACK_ALLOC/sizeof(long)]; |
1da177e4c
|
1194 |
|
1da177e4c
|
1195 1196 |
if (n < 0) goto out_nofds; |
bbea9f696
|
1197 |
/* max_fds can increase, so grab it once to avoid race */ |
ac5b8b6f2
|
1198 |
rcu_read_lock(); |
a4531edd7
|
1199 |
fdt = files_fdtable(current->files); |
bbea9f696
|
1200 |
max_fds = fdt->max_fds; |
ac5b8b6f2
|
1201 |
rcu_read_unlock(); |
bbea9f696
|
1202 1203 |
if (n > max_fds) n = max_fds; |
1da177e4c
|
1204 1205 1206 1207 1208 1209 |
/* * We need 6 bitmaps (in/out/ex for both incoming and outgoing), * since we used fdset we need to allocate memory in units of * long-words. */ |
1da177e4c
|
1210 |
size = FDS_BYTES(n); |
6087b2dab
|
1211 1212 1213 1214 1215 1216 1217 |
bits = stack_fds; if (size > sizeof(stack_fds) / 6) { bits = kmalloc(6 * size, GFP_KERNEL); ret = -ENOMEM; if (!bits) goto out_nofds; } |
1da177e4c
|
1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 |
fds.in = (unsigned long *) bits; fds.out = (unsigned long *) (bits + size); fds.ex = (unsigned long *) (bits + 2*size); fds.res_in = (unsigned long *) (bits + 3*size); fds.res_out = (unsigned long *) (bits + 4*size); fds.res_ex = (unsigned long *) (bits + 5*size); if ((ret = compat_get_fd_set(n, inp, fds.in)) || (ret = compat_get_fd_set(n, outp, fds.out)) || (ret = compat_get_fd_set(n, exp, fds.ex))) goto out; zero_fd_set(n, fds.res_in); zero_fd_set(n, fds.res_out); zero_fd_set(n, fds.res_ex); |
8ff3e8e85
|
1232 |
ret = do_select(n, &fds, end_time); |
1da177e4c
|
1233 1234 1235 1236 1237 1238 1239 1240 1241 |
if (ret < 0) goto out; if (!ret) { ret = -ERESTARTNOHAND; if (signal_pending(current)) goto out; ret = 0; } |
7116e994b
|
1242 1243 1244 1245 |
if (compat_set_fd_set(n, inp, fds.res_in) || compat_set_fd_set(n, outp, fds.res_out) || compat_set_fd_set(n, exp, fds.res_ex)) ret = -EFAULT; |
1da177e4c
|
1246 |
out: |
6087b2dab
|
1247 1248 |
if (bits != stack_fds) kfree(bits); |
1da177e4c
|
1249 1250 1251 |
out_nofds: return ret; } |
625b1d7e8
|
1252 1253 1254 |
COMPAT_SYSCALL_DEFINE5(select, int, n, compat_ulong_t __user *, inp, compat_ulong_t __user *, outp, compat_ulong_t __user *, exp, struct compat_timeval __user *, tvp) |
9f72949f6
|
1255 |
{ |
8ff3e8e85
|
1256 |
struct timespec end_time, *to = NULL; |
9f72949f6
|
1257 1258 1259 1260 1261 1262 |
struct compat_timeval tv; int ret; if (tvp) { if (copy_from_user(&tv, tvp, sizeof(tv))) return -EFAULT; |
8ff3e8e85
|
1263 |
to = &end_time; |
4d36a9e65
|
1264 1265 1266 |
if (poll_select_set_timeout(to, tv.tv_sec + (tv.tv_usec / USEC_PER_SEC), (tv.tv_usec % USEC_PER_SEC) * NSEC_PER_USEC)) |
9f72949f6
|
1267 |
return -EINVAL; |
9f72949f6
|
1268 |
} |
8ff3e8e85
|
1269 1270 |
ret = compat_core_sys_select(n, inp, outp, exp, to); ret = poll_select_copy_remaining(&end_time, tvp, 1, ret); |
9f72949f6
|
1271 1272 1273 |
return ret; } |
5d0e52830
|
1274 1275 1276 1277 1278 1279 1280 |
struct compat_sel_arg_struct { compat_ulong_t n; compat_uptr_t inp; compat_uptr_t outp; compat_uptr_t exp; compat_uptr_t tvp; }; |
625b1d7e8
|
1281 |
COMPAT_SYSCALL_DEFINE1(old_select, struct compat_sel_arg_struct __user *, arg) |
5d0e52830
|
1282 1283 1284 1285 1286 1287 1288 1289 |
{ struct compat_sel_arg_struct a; if (copy_from_user(&a, arg, sizeof(a))) return -EFAULT; return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp), compat_ptr(a.exp), compat_ptr(a.tvp)); } |
c9da9f212
|
1290 |
static long do_compat_pselect(int n, compat_ulong_t __user *inp, |
9f72949f6
|
1291 1292 1293 1294 1295 1296 |
compat_ulong_t __user *outp, compat_ulong_t __user *exp, struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask, compat_size_t sigsetsize) { compat_sigset_t ss32; sigset_t ksigmask, sigsaved; |
9f72949f6
|
1297 |
struct compat_timespec ts; |
8ff3e8e85
|
1298 |
struct timespec end_time, *to = NULL; |
9f72949f6
|
1299 1300 1301 1302 1303 |
int ret; if (tsp) { if (copy_from_user(&ts, tsp, sizeof(ts))) return -EFAULT; |
8ff3e8e85
|
1304 1305 |
to = &end_time; if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec)) |
9f72949f6
|
1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 |
return -EINVAL; } if (sigmask) { if (sigsetsize != sizeof(compat_sigset_t)) return -EINVAL; if (copy_from_user(&ss32, sigmask, sizeof(ss32))) return -EFAULT; sigset_from_compat(&ksigmask, &ss32); sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); } |
8ff3e8e85
|
1319 1320 |
ret = compat_core_sys_select(n, inp, outp, exp, to); ret = poll_select_copy_remaining(&end_time, tsp, 0, ret); |
9f72949f6
|
1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 |
if (ret == -ERESTARTNOHAND) { /* * Don't restore the signal mask yet. Let do_signal() deliver * the signal on the way back to userspace, before the signal * mask is restored. */ if (sigmask) { memcpy(¤t->saved_sigmask, &sigsaved, sizeof(sigsaved)); |
4e4c22c71
|
1331 |
set_restore_sigmask(); |
9f72949f6
|
1332 1333 1334 1335 1336 1337 |
} } else if (sigmask) sigprocmask(SIG_SETMASK, &sigsaved, NULL); return ret; } |
625b1d7e8
|
1338 1339 1340 |
COMPAT_SYSCALL_DEFINE6(pselect6, int, n, compat_ulong_t __user *, inp, compat_ulong_t __user *, outp, compat_ulong_t __user *, exp, struct compat_timespec __user *, tsp, void __user *, sig) |
9f72949f6
|
1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 |
{ compat_size_t sigsetsize = 0; compat_uptr_t up = 0; if (sig) { if (!access_ok(VERIFY_READ, sig, sizeof(compat_uptr_t)+sizeof(compat_size_t)) || __get_user(up, (compat_uptr_t __user *)sig) || __get_user(sigsetsize, (compat_size_t __user *)(sig+sizeof(up)))) return -EFAULT; } |
c9da9f212
|
1353 1354 |
return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(up), sigsetsize); |
9f72949f6
|
1355 |
} |
625b1d7e8
|
1356 1357 1358 |
COMPAT_SYSCALL_DEFINE5(ppoll, struct pollfd __user *, ufds, unsigned int, nfds, struct compat_timespec __user *, tsp, const compat_sigset_t __user *, sigmask, compat_size_t, sigsetsize) |
9f72949f6
|
1359 1360 1361 1362 |
{ compat_sigset_t ss32; sigset_t ksigmask, sigsaved; struct compat_timespec ts; |
8ff3e8e85
|
1363 |
struct timespec end_time, *to = NULL; |
9f72949f6
|
1364 1365 1366 1367 1368 |
int ret; if (tsp) { if (copy_from_user(&ts, tsp, sizeof(ts))) return -EFAULT; |
8ff3e8e85
|
1369 1370 1371 |
to = &end_time; if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec)) return -EINVAL; |
9f72949f6
|
1372 1373 1374 |
} if (sigmask) { |
3835a9bd0
|
1375 |
if (sigsetsize != sizeof(compat_sigset_t)) |
9f72949f6
|
1376 1377 1378 1379 1380 1381 1382 1383 |
return -EINVAL; if (copy_from_user(&ss32, sigmask, sizeof(ss32))) return -EFAULT; sigset_from_compat(&ksigmask, &ss32); sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); } |
8ff3e8e85
|
1384 |
ret = do_sys_poll(ufds, nfds, to); |
9f72949f6
|
1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 |
/* We can restart this syscall, usually */ if (ret == -EINTR) { /* * Don't restore the signal mask yet. Let do_signal() deliver * the signal on the way back to userspace, before the signal * mask is restored. */ if (sigmask) { memcpy(¤t->saved_sigmask, &sigsaved, sizeof(sigsaved)); |
4e4c22c71
|
1396 |
set_restore_sigmask(); |
9f72949f6
|
1397 1398 1399 1400 |
} ret = -ERESTARTNOHAND; } else if (sigmask) sigprocmask(SIG_SETMASK, &sigsaved, NULL); |
8ff3e8e85
|
1401 |
ret = poll_select_copy_remaining(&end_time, tsp, 0, ret); |
9f72949f6
|
1402 1403 1404 |
return ret; } |
9f72949f6
|
1405 |
|
becfd1f37
|
1406 1407 1408 1409 1410 |
#ifdef CONFIG_FHANDLE /* * Exactly like fs/open.c:sys_open_by_handle_at(), except that it * doesn't set the O_LARGEFILE flag. */ |
f482e1b4a
|
1411 1412 |
COMPAT_SYSCALL_DEFINE3(open_by_handle_at, int, mountdirfd, struct file_handle __user *, handle, int, flags) |
becfd1f37
|
1413 1414 1415 1416 |
{ return do_handle_open(mountdirfd, handle, flags); } #endif |