Hi Axel, Mike, On Tue, Oct 17, 2023 at 04:01:09PM -0700, Axel Rasmussen wrote: > The list of error codes in the man page was out of date with respect to > the current state of the kernel. Some errors were partially / > incorrectly described. > > Update the error code listing, so it matches the current state of the > kernel, and correctly describes all the errors. > > Signed-off-by: Axel Rasmussen <axelrasmussen@xxxxxxxxxx> I'll wait a bit before applying this one, in case Mike (or Peter) want to review it. The other two, you can find them here, as usual: <https://www.alejandro-colomar.es/src/alx/linux/man-pages/man-pages.git/commit/?h=contrib&id=9ae03d21383151794b118ac8dd98b4d6e26c9689> <https://www.alejandro-colomar.es/src/alx/linux/man-pages/man-pages.git/commit/?h=contrib&id=5f1acc81e55540d1276977e66d64649c6ca7b58b> And BTW, while running `make lint build check`, I caught some accidents from a previous patch from yours: <https://www.alejandro-colomar.es/src/alx/linux/man-pages/man-pages.git/commit/?h=contrib&id=bf8647d1d82205934776b474fe89e5f30e03ad25> Cheers, Alex > --- > man2/ioctl_userfaultfd.2 | 33 +++++++++++++++++++-------------- > 1 file changed, 19 insertions(+), 14 deletions(-) > > diff --git a/man2/ioctl_userfaultfd.2 b/man2/ioctl_userfaultfd.2 > index 82aee667c..40528001e 100644 > --- a/man2/ioctl_userfaultfd.2 > +++ b/man2/ioctl_userfaultfd.2 > @@ -413,8 +413,6 @@ On error, \-1 is returned and > .I errno > is set to indicate the error. > Possible errors include: > -.\" FIXME Is the following error list correct? > -.\" > .TP > .B EBUSY > A mapping in the specified range is registered with another > @@ -433,21 +431,28 @@ field; or the > field was zero. > .TP > .B EINVAL > -There is no mapping in the specified address range. > -.TP > -.B EINVAL > -.I range.start > +The specified address range was invalid. > +More specifically, > +no mapping exists in the given range, > +or the mapping that exists there is invalid > +(e.g. unsupported type of memory), > +or the range values > +.RI ( range.start > +or > +.IR range.len ) > +are not multiples of the relevant page size, > or > .I range.len > -is not a multiple of the system page size; or, > -.I range.len > -is zero; or these fields are otherwise invalid. > +is zero. > .TP > -.B EINVAL > -There as an incompatible mapping in the specified address range. > -.\" Mike Rapoport: > -.\" ENOMEM if the process is exiting and the > -.\" mm_struct has gone by the time userfault grabs it. > +.B ENOMEM > +The process is exiting, > +and its address space has already been torn down > +when userfaultfd attempts to reference it. > +.TP > +.B EPERM > +The userfaultfd would allow writing to a file backing the mapping, > +but the calling process lacks such write permissions. > .SS UFFDIO_UNREGISTER > (Since Linux 4.3.) > Unregister a memory address range from userfaultfd. > -- > 2.42.0.655.g421f12c284-goog > -- <https://www.alejandro-colomar.es/>
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