Date: Tue, 2 May 2023 22:26:49 +0300 From: Dmitry Chagin <dchagin@freebsd.org> To: Mark Johnston <markj@freebsd.org> Cc: Konstantin Belousov <kib@freebsd.org>, src-committers@freebsd.org, dev-commits-src-all@freebsd.org, dev-commits-src-main@freebsd.org Subject: Re: git: a1d71cebc05c - main - fstatat(2): restore AT_EMPTY_PATH handling Message-ID: <ZFFj-Rks8P0L0zxu@heemeyer.club> In-Reply-To: <ZFFexSTAU6hh8jI-@nuc> References: <202305021512.342FCpbN056202@gitrepo.freebsd.org> <ZFFBke7JKtnwyj23@heemeyer.club> <ZFFexSTAU6hh8jI-@nuc>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, May 02, 2023 at 03:04:37PM -0400, Mark Johnston wrote: > On Tue, May 02, 2023 at 08:00:01PM +0300, Dmitry Chagin wrote: > > On Tue, May 02, 2023 at 03:12:51PM +0000, Konstantin Belousov wrote: > > > The branch main has been updated by kib: > > > > > > URL: https://cgit.FreeBSD.org/src/commit/?id=a1d71cebc05ccfeedf95f2db3e94b17270167888 > > > > > > commit a1d71cebc05ccfeedf95f2db3e94b17270167888 > > > Author: Konstantin Belousov <kib@FreeBSD.org> > > > AuthorDate: 2023-05-02 15:11:39 +0000 > > > Commit: Konstantin Belousov <kib@FreeBSD.org> > > > CommitDate: 2023-05-02 15:11:39 +0000 > > > > > > fstatat(2): restore AT_EMPTY_PATH handling > > > > > > Fixes: cb858340dcbf214cc4c4d78dbb741620d7b3a252 > > > Reported by: markj > > > Sponsored by: The FreeBSD Foundation > > > --- > > > sys/kern/vfs_syscalls.c | 6 +++++- > > > 1 file changed, 5 insertions(+), 1 deletion(-) > > > > > > diff --git a/sys/kern/vfs_syscalls.c b/sys/kern/vfs_syscalls.c > > > index 5c0a291e3b0b..d68af4ea4d51 100644 > > > --- a/sys/kern/vfs_syscalls.c > > > +++ b/sys/kern/vfs_syscalls.c > > > @@ -2438,8 +2438,12 @@ kern_statat(struct thread *td, int flag, int fd, const char *path, > > > AT_SYMLINK_NOFOLLOW | AT_EMPTY_PATH) | LOCKSHARED | LOCKLEAF | > > > AUDITVNODE1, pathseg, path, fd, &cap_fstat_rights); > > > > > > - if ((error = namei(&nd)) != 0) > > > + if ((error = namei(&nd)) != 0) { > > > + if (error == ENOTDIR && > > > + (nd.ni_resflags & NIRES_EMPTYPATH) != 0) > > > + error = kern_fstat(td, fd, sbp); > > > return (error); > > > + } > > > > cache_fplookup_dirfd() doesnt set the NIRES_EMPTYPATH flag > > It doesn't, but for an AT_EMPTY_PATH lookup it aborts the lookup and > returns ENOTDIR to namei(), which sets NIRES_EMPTYPATH before passing > the error up. > it call cache_fpl_handled_error() which is set status to CACHE_FPL_STATUS_HADLED, namei() simply return error in that path > > > error = VOP_STAT(nd.ni_vp, sbp, td->td_ucred, NOCRED); > > > NDFREE_PNBUF(&nd); > > > vput(nd.ni_vp); > >
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?ZFFj-Rks8P0L0zxu>