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-rw-r--r--fs/orangefs/devorangefs-req.c54
-rw-r--r--fs/signalfd.c50
-rw-r--r--fs/splice.c144
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(&current->sighand->siglock);
- ctx->sigmask = sigmask;
+ ctx->sigmask = *mask;
spin_unlock_irq(&current->sighand->siglock);
wake_up(&current->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
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 22:53:51 +0000