X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=fs%2Fcompat.c;h=040a8be38a4896af7334769a9cb26f852b5cc56a;hb=49cb8d2d496ce06869ccca2ab368ed6b0b5b979d;hp=a7e3f162fb15f9694425384710524f2dc122ff35;hpb=21b4e736922f546e0f1aa7b9d6c442f309a2444a;p=powerpc.git diff --git a/fs/compat.c b/fs/compat.c index a7e3f162fb..040a8be38a 100644 --- a/fs/compat.c +++ b/fs/compat.c @@ -48,6 +48,7 @@ #include #include #include +#include #include /* siocdevprivate_ioctl */ @@ -232,7 +233,7 @@ asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user file = fget(fd); if (!file) goto out; - error = vfs_statfs(file->f_dentry, &tmp); + error = vfs_statfs(file->f_path.dentry, &tmp); if (!error) error = put_compat_statfs(buf, &tmp); fput(file); @@ -303,7 +304,7 @@ asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct c file = fget(fd); if (!file) goto out; - error = vfs_statfs(file->f_dentry, &tmp); + error = vfs_statfs(file->f_path.dentry, &tmp); if (!error) error = put_compat_statfs64(buf, &tmp); fput(file); @@ -365,7 +366,7 @@ static void compat_ioctl_error(struct file *filp, unsigned int fd, /* find the name of the device. */ path = (char *)__get_free_page(GFP_KERNEL); if (path) { - fn = d_path(filp->f_dentry, filp->f_vfsmnt, path, PAGE_SIZE); + fn = d_path(filp->f_path.dentry, filp->f_path.mnt, path, PAGE_SIZE); if (IS_ERR(fn)) fn = "?"; } @@ -416,7 +417,7 @@ asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, case FIBMAP: case FIGETBSZ: case FIONREAD: - if (S_ISREG(filp->f_dentry->d_inode->i_mode)) + if (S_ISREG(filp->f_path.dentry->d_inode->i_mode)) break; /*FALL THROUGH*/ @@ -438,7 +439,7 @@ asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, goto found_handler; } - if (S_ISSOCK(filp->f_dentry->d_inode->i_mode) && + if (S_ISSOCK(filp->f_path.dentry->d_inode->i_mode) && cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { error = siocdevprivate_ioctl(fd, cmd, arg); } else { @@ -1259,7 +1260,7 @@ out: if (iov != iovstack) kfree(iov); if ((ret + (type == READ)) > 0) { - struct dentry *dentry = file->f_dentry; + struct dentry *dentry = file->f_path.dentry; if (type == READ) fsnotify_access(dentry); else @@ -1679,19 +1680,19 @@ int compat_core_sys_select(int n, compat_ulong_t __user *inp, { fd_set_bits fds; char *bits; - int size, max_fdset, ret = -EINVAL; + int size, max_fds, ret = -EINVAL; struct fdtable *fdt; if (n < 0) goto out_nofds; - /* max_fdset can increase, so grab it once to avoid race */ + /* max_fds can increase, so grab it once to avoid race */ rcu_read_lock(); fdt = files_fdtable(current->files); - max_fdset = fdt->max_fdset; + max_fds = fdt->max_fds; rcu_read_unlock(); - if (n > max_fdset) - n = max_fdset; + if (n > max_fds) + n = max_fds; /* * We need 6 bitmaps (in/out/ex for both incoming and outgoing), @@ -2235,3 +2236,102 @@ long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2) return sys_ni_syscall(); } #endif + +#ifdef CONFIG_EPOLL + +#ifdef CONFIG_HAS_COMPAT_EPOLL_EVENT +asmlinkage long compat_sys_epoll_ctl(int epfd, int op, int fd, + struct compat_epoll_event __user *event) +{ + long err = 0; + struct compat_epoll_event user; + struct epoll_event __user *kernel = NULL; + + if (event) { + if (copy_from_user(&user, event, sizeof(user))) + return -EFAULT; + kernel = compat_alloc_user_space(sizeof(struct epoll_event)); + err |= __put_user(user.events, &kernel->events); + err |= __put_user(user.data, &kernel->data); + } + + return err ? err : sys_epoll_ctl(epfd, op, fd, kernel); +} + + +asmlinkage long compat_sys_epoll_wait(int epfd, + struct compat_epoll_event __user *events, + int maxevents, int timeout) +{ + long i, ret, err = 0; + struct epoll_event __user *kbuf; + struct epoll_event ev; + + if ((maxevents <= 0) || + (maxevents > (INT_MAX / sizeof(struct epoll_event)))) + return -EINVAL; + kbuf = compat_alloc_user_space(sizeof(struct epoll_event) * maxevents); + ret = sys_epoll_wait(epfd, kbuf, maxevents, timeout); + for (i = 0; i < ret; i++) { + err |= __get_user(ev.events, &kbuf[i].events); + err |= __get_user(ev.data, &kbuf[i].data); + err |= __put_user(ev.events, &events->events); + err |= __put_user_unaligned(ev.data, &events->data); + events++; + } + + return err ? -EFAULT: ret; +} +#endif /* CONFIG_HAS_COMPAT_EPOLL_EVENT */ + +#ifdef TIF_RESTORE_SIGMASK +asmlinkage long compat_sys_epoll_pwait(int epfd, + struct compat_epoll_event __user *events, + int maxevents, int timeout, + const compat_sigset_t __user *sigmask, + compat_size_t sigsetsize) +{ + long err; + compat_sigset_t csigmask; + sigset_t ksigmask, sigsaved; + + /* + * If the caller wants a certain signal mask to be set during the wait, + * we apply it here. + */ + if (sigmask) { + if (sigsetsize != sizeof(compat_sigset_t)) + return -EINVAL; + if (copy_from_user(&csigmask, sigmask, sizeof(csigmask))) + return -EFAULT; + sigset_from_compat(&ksigmask, &csigmask); + sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP)); + sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); + } + +#ifdef CONFIG_HAS_COMPAT_EPOLL_EVENT + err = compat_sys_epoll_wait(epfd, events, maxevents, timeout); +#else + err = sys_epoll_wait(epfd, events, maxevents, timeout); +#endif + + /* + * If we changed the signal mask, we need to restore the original one. + * In case we've got a signal while waiting, we do not restore the + * signal mask yet, and we allow do_signal() to deliver the signal on + * the way back to userspace, before the signal mask is restored. + */ + if (sigmask) { + if (err == -EINTR) { + memcpy(¤t->saved_sigmask, &sigsaved, + sizeof(sigsaved)); + set_thread_flag(TIF_RESTORE_SIGMASK); + } else + sigprocmask(SIG_SETMASK, &sigsaved, NULL); + } + + return err; +} +#endif /* TIF_RESTORE_SIGMASK */ + +#endif /* CONFIG_EPOLL */