diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/orangefs/devorangefs-req.c | 54 | ||||
| -rw-r--r-- | fs/signalfd.c | 50 | ||||
| -rw-r--r-- | fs/splice.c | 144 |
3 files changed, 112 insertions, 136 deletions
diff --git a/fs/orangefs/devorangefs-req.c b/fs/orangefs/devorangefs-req.c index 74b37cbbd5d4..33ee8cb32f83 100644 --- a/fs/orangefs/devorangefs-req.c +++ b/fs/orangefs/devorangefs-req.c @@ -719,37 +719,6 @@ struct ORANGEFS_dev_map_desc32 { __s32 count; }; -static unsigned long translate_dev_map26(unsigned long args, long *error) -{ - struct ORANGEFS_dev_map_desc32 __user *p32 = (void __user *)args; - /* - * Depending on the architecture, allocate some space on the - * user-call-stack based on our expected layout. - */ - struct ORANGEFS_dev_map_desc __user *p = - compat_alloc_user_space(sizeof(*p)); - compat_uptr_t addr; - - *error = 0; - /* get the ptr from the 32 bit user-space */ - if (get_user(addr, &p32->ptr)) - goto err; - /* try to put that into a 64-bit layout */ - if (put_user(compat_ptr(addr), &p->ptr)) - goto err; - /* copy the remaining fields */ - if (copy_in_user(&p->total_size, &p32->total_size, sizeof(__s32))) - goto err; - if (copy_in_user(&p->size, &p32->size, sizeof(__s32))) - goto err; - if (copy_in_user(&p->count, &p32->count, sizeof(__s32))) - goto err; - return (unsigned long)p; -err: - *error = -EFAULT; - return 0; -} - /* * 32 bit user-space apps' ioctl handlers when kernel modules * is compiled as a 64 bit one @@ -758,25 +727,26 @@ static long orangefs_devreq_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long args) { long ret; - unsigned long arg = args; /* Check for properly constructed commands */ ret = check_ioctl_command(cmd); if (ret < 0) return ret; if (cmd == ORANGEFS_DEV_MAP) { - /* - * convert the arguments to what we expect internally - * in kernel space - */ - arg = translate_dev_map26(args, &ret); - if (ret < 0) { - gossip_err("Could not translate dev map\n"); - return ret; - } + struct ORANGEFS_dev_map_desc desc; + struct ORANGEFS_dev_map_desc32 d32; + + if (copy_from_user(&d32, (void __user *)args, sizeof(d32))) + return -EFAULT; + + desc.ptr = compat_ptr(d32.ptr); + desc.total_size = d32.total_size; + desc.size = d32.size; + desc.count = d32.count; + return orangefs_bufmap_initialize(&desc); } /* no other ioctl requires translation */ - return dispatch_ioctl_command(cmd, arg); + return dispatch_ioctl_command(cmd, args); } #endif /* CONFIG_COMPAT is in .config */ diff --git a/fs/signalfd.c b/fs/signalfd.c index cbb42f77a2bd..4fcd1498acf5 100644 --- a/fs/signalfd.c +++ b/fs/signalfd.c @@ -259,10 +259,8 @@ static const struct file_operations signalfd_fops = { .llseek = noop_llseek, }; -static int do_signalfd4(int ufd, sigset_t __user *user_mask, size_t sizemask, - int flags) +static int do_signalfd4(int ufd, sigset_t *mask, int flags) { - sigset_t sigmask; struct signalfd_ctx *ctx; /* Check the SFD_* constants for consistency. */ @@ -272,18 +270,15 @@ static int do_signalfd4(int ufd, sigset_t __user *user_mask, size_t sizemask, if (flags & ~(SFD_CLOEXEC | SFD_NONBLOCK)) return -EINVAL; - if (sizemask != sizeof(sigset_t) || - copy_from_user(&sigmask, user_mask, sizeof(sigmask))) - return -EINVAL; - sigdelsetmask(&sigmask, sigmask(SIGKILL) | sigmask(SIGSTOP)); - signotset(&sigmask); + sigdelsetmask(mask, sigmask(SIGKILL) | sigmask(SIGSTOP)); + signotset(mask); if (ufd == -1) { ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); if (!ctx) return -ENOMEM; - ctx->sigmask = sigmask; + ctx->sigmask = *mask; /* * When we call this, the initialization must be complete, since @@ -303,7 +298,7 @@ static int do_signalfd4(int ufd, sigset_t __user *user_mask, size_t sizemask, return -EINVAL; } spin_lock_irq(¤t->sighand->siglock); - ctx->sigmask = sigmask; + ctx->sigmask = *mask; spin_unlock_irq(¤t->sighand->siglock); wake_up(¤t->sighand->signalfd_wqh); @@ -316,46 +311,51 @@ static int do_signalfd4(int ufd, sigset_t __user *user_mask, size_t sizemask, SYSCALL_DEFINE4(signalfd4, int, ufd, sigset_t __user *, user_mask, size_t, sizemask, int, flags) { - return do_signalfd4(ufd, user_mask, sizemask, flags); + sigset_t mask; + + if (sizemask != sizeof(sigset_t) || + copy_from_user(&mask, user_mask, sizeof(mask))) + return -EINVAL; + return do_signalfd4(ufd, &mask, flags); } SYSCALL_DEFINE3(signalfd, int, ufd, sigset_t __user *, user_mask, size_t, sizemask) { - return do_signalfd4(ufd, user_mask, sizemask, 0); + sigset_t mask; + + if (sizemask != sizeof(sigset_t) || + copy_from_user(&mask, user_mask, sizeof(mask))) + return -EINVAL; + return do_signalfd4(ufd, &mask, 0); } #ifdef CONFIG_COMPAT static long do_compat_signalfd4(int ufd, - const compat_sigset_t __user *sigmask, + const compat_sigset_t __user *user_mask, compat_size_t sigsetsize, int flags) { - sigset_t tmp; - sigset_t __user *ksigmask; + sigset_t mask; if (sigsetsize != sizeof(compat_sigset_t)) return -EINVAL; - if (get_compat_sigset(&tmp, sigmask)) - return -EFAULT; - ksigmask = compat_alloc_user_space(sizeof(sigset_t)); - if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t))) + if (get_compat_sigset(&mask, user_mask)) return -EFAULT; - - return do_signalfd4(ufd, ksigmask, sizeof(sigset_t), flags); + return do_signalfd4(ufd, &mask, flags); } COMPAT_SYSCALL_DEFINE4(signalfd4, int, ufd, - const compat_sigset_t __user *, sigmask, + const compat_sigset_t __user *, user_mask, compat_size_t, sigsetsize, int, flags) { - return do_compat_signalfd4(ufd, sigmask, sigsetsize, flags); + return do_compat_signalfd4(ufd, user_mask, sigsetsize, flags); } COMPAT_SYSCALL_DEFINE3(signalfd, int, ufd, - const compat_sigset_t __user *,sigmask, + const compat_sigset_t __user *, user_mask, compat_size_t, sigsetsize) { - return do_compat_signalfd4(ufd, sigmask, sigsetsize, 0); + return do_compat_signalfd4(ufd, user_mask, sigsetsize, 0); } #endif diff --git a/fs/splice.c b/fs/splice.c index 2365ab073a27..b3daa971f597 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -1243,38 +1243,26 @@ static int pipe_to_user(struct pipe_inode_info *pipe, struct pipe_buffer *buf, * For lack of a better implementation, implement vmsplice() to userspace * as a simple copy of the pipes pages to the user iov. */ -static long vmsplice_to_user(struct file *file, const struct iovec __user *uiov, - unsigned long nr_segs, unsigned int flags) +static long vmsplice_to_user(struct file *file, struct iov_iter *iter, + unsigned int flags) { - struct pipe_inode_info *pipe; - struct splice_desc sd; - long ret; - struct iovec iovstack[UIO_FASTIOV]; - struct iovec *iov = iovstack; - struct iov_iter iter; + struct pipe_inode_info *pipe = get_pipe_info(file); + struct splice_desc sd = { + .total_len = iov_iter_count(iter), + .flags = flags, + .u.data = iter + }; + long ret = 0; - pipe = get_pipe_info(file); if (!pipe) return -EBADF; - ret = import_iovec(READ, uiov, nr_segs, - ARRAY_SIZE(iovstack), &iov, &iter); - if (ret < 0) - return ret; - - sd.total_len = iov_iter_count(&iter); - sd.len = 0; - sd.flags = flags; - sd.u.data = &iter; - sd.pos = 0; - if (sd.total_len) { pipe_lock(pipe); ret = __splice_from_pipe(pipe, &sd, pipe_to_user); pipe_unlock(pipe); } - kfree(iov); return ret; } @@ -1283,14 +1271,11 @@ static long vmsplice_to_user(struct file *file, const struct iovec __user *uiov, * as splice-from-memory, where the regular splice is splice-from-file (or * to file). In both cases the output is a pipe, naturally. */ -static long vmsplice_to_pipe(struct file *file, const struct iovec __user *uiov, - unsigned long nr_segs, unsigned int flags) +static long vmsplice_to_pipe(struct file *file, struct iov_iter *iter, + unsigned int flags) { struct pipe_inode_info *pipe; - struct iovec iovstack[UIO_FASTIOV]; - struct iovec *iov = iovstack; - struct iov_iter from; - long ret; + long ret = 0; unsigned buf_flag = 0; if (flags & SPLICE_F_GIFT) @@ -1300,22 +1285,31 @@ static long vmsplice_to_pipe(struct file *file, const struct iovec __user *uiov, if (!pipe) return -EBADF; - ret = import_iovec(WRITE, uiov, nr_segs, - ARRAY_SIZE(iovstack), &iov, &from); - if (ret < 0) - return ret; - pipe_lock(pipe); ret = wait_for_space(pipe, flags); if (!ret) - ret = iter_to_pipe(&from, pipe, buf_flag); + ret = iter_to_pipe(iter, pipe, buf_flag); pipe_unlock(pipe); if (ret > 0) wakeup_pipe_readers(pipe); - kfree(iov); return ret; } +static int vmsplice_type(struct fd f, int *type) +{ + if (!f.file) + return -EBADF; + if (f.file->f_mode & FMODE_WRITE) { + *type = WRITE; + } else if (f.file->f_mode & FMODE_READ) { + *type = READ; + } else { + fdput(f); + return -EBADF; + } + return 0; +} + /* * Note that vmsplice only really supports true splicing _from_ user memory * to a pipe, not the other way around. Splicing from user memory is a simple @@ -1332,57 +1326,69 @@ static long vmsplice_to_pipe(struct file *file, const struct iovec __user *uiov, * Currently we punt and implement it as a normal copy, see pipe_to_user(). * */ -static long do_vmsplice(int fd, const struct iovec __user *iov, - unsigned long nr_segs, unsigned int flags) +static long do_vmsplice(struct file *f, struct iov_iter *iter, unsigned int flags) { - struct fd f; - long error; - if (unlikely(flags & ~SPLICE_F_ALL)) return -EINVAL; - if (unlikely(nr_segs > UIO_MAXIOV)) - return -EINVAL; - else if (unlikely(!nr_segs)) - return 0; - error = -EBADF; - f = fdget(fd); - if (f.file) { - if (f.file->f_mode & FMODE_WRITE) - error = vmsplice_to_pipe(f.file, iov, nr_segs, flags); - else if (f.file->f_mode & FMODE_READ) - error = vmsplice_to_user(f.file, iov, nr_segs, flags); - - fdput(f); - } + if (!iov_iter_count(iter)) + return 0; - return error; + if (iov_iter_rw(iter) == WRITE) + return vmsplice_to_pipe(f, iter, flags); + else + return vmsplice_to_user(f, iter, flags); } -SYSCALL_DEFINE4(vmsplice, int, fd, const struct iovec __user *, iov, +SYSCALL_DEFINE4(vmsplice, int, fd, const struct iovec __user *, uiov, unsigned long, nr_segs, unsigned int, flags) { - return do_vmsplice(fd, iov, nr_segs, flags); + struct iovec iovstack[UIO_FASTIOV]; + struct iovec *iov = iovstack; + struct iov_iter iter; + long error; + struct fd f; + int type; + + f = fdget(fd); + error = vmsplice_type(f, &type); + if (error) + return error; + + error = import_iovec(type, uiov, nr_segs, + ARRAY_SIZE(iovstack), &iov, &iter); + if (!error) { + error = do_vmsplice(f.file, &iter, flags); + kfree(iov); + } + fdput(f); + return error; } #ifdef CONFIG_COMPAT COMPAT_SYSCALL_DEFINE4(vmsplice, int, fd, const struct compat_iovec __user *, iov32, unsigned int, nr_segs, unsigned int, flags) { - unsigned i; - struct iovec __user *iov; - if (nr_segs > UIO_MAXIOV) - return -EINVAL; - iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec)); - for (i = 0; i < nr_segs; i++) { - struct compat_iovec v; - if (get_user(v.iov_base, &iov32[i].iov_base) || - get_user(v.iov_len, &iov32[i].iov_len) || - put_user(compat_ptr(v.iov_base), &iov[i].iov_base) || - put_user(v.iov_len, &iov[i].iov_len)) - return -EFAULT; + struct iovec iovstack[UIO_FASTIOV]; + struct iovec *iov = iovstack; + struct iov_iter iter; + long error; + struct fd f; + int type; + + f = fdget(fd); + error = vmsplice_type(f, &type); + if (error) + return error; + + error = compat_import_iovec(type, iov32, nr_segs, + ARRAY_SIZE(iovstack), &iov, &iter); + if (!error) { + error = do_vmsplice(f.file, &iter, flags); + kfree(iov); } - return do_vmsplice(fd, iov, nr_segs, flags); + fdput(f); + return error; } #endif |
