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Merge tag 'vfs-6.10.rw' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

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Pull vfs rw iterator updates from Christian Brauner:
 "The core fs signalfd, userfaultfd, and timerfd subsystems did still
  use f_op->read() instead of f_op->read_iter(). Convert them over since
  we should aim to get rid of f_op->read() at some point.

  Aside from that io_uring and others want to mark files as FMODE_NOWAIT
  so it can make use of per-IO nonblocking hints to enable more
  efficient IO. Converting those users to f_op->read_iter() allows them
  to be marked with FMODE_NOWAIT"

* tag 'vfs-6.10.rw' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  signalfd: convert to ->read_iter()
  userfaultfd: convert to ->read_iter()
  timerfd: convert to ->read_iter()
  new helper: copy_to_iter_full()
This commit is contained in:
Linus Torvalds
2024-05-13 12:23:17 -07:00
parent ef31ea6c27 3a93daea2f
commit f4e8d80292
5 changed files with 93 additions and 50 deletions
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10
include/linux/uio.h
View File

@@ -205,6 +205,16 @@ size_t copy_from_iter(void *addr, size_t bytes, struct iov_iter *i)
return 0;
}
static __always_inline __must_check
bool copy_to_iter_full(const void *addr, size_t bytes, struct iov_iter *i)
{
size_t copied = copy_to_iter(addr, bytes, i);
if (likely(copied == bytes))
return true;
iov_iter_revert(i, copied);
return false;
}
static __always_inline __must_check
bool copy_from_iter_full(void *addr, size_t bytes, struct iov_iter *i)
{

9
include/net/udp.h
View File

@@ -379,14 +379,7 @@ static inline bool udp_skb_is_linear(struct sk_buff *skb)
static inline int copy_linear_skb(struct sk_buff *skb, int len, int off,
struct iov_iter *to)
{
int n;
n = copy_to_iter(skb->data + off, len, to);
if (n == len)
return 0;
iov_iter_revert(to, n);
return -EFAULT;
return copy_to_iter_full(skb->data + off, len, to) ? 0 : -EFAULT;
}
/*