[Virtio-fs] [PATCH v7 3/7] virtiofsd: Add support for extended setxattr
Vivek Goyal
vgoyal at redhat.com
Mon Jun 28 18:28:00 UTC 2021
On Mon, Jun 28, 2021 at 04:49:02PM +0100, Dr. David Alan Gilbert wrote:
> * Vivek Goyal (vgoyal at redhat.com) wrote:
> > Add the bits to enable support for setxattr_ext if fuse offers it. Do not
> > enable it by default yet. Let passthrough_ll opt-in. Enabling it by deafult
> > kind of automatically means that you are taking responsibility of clearing
> > SGID if ACL is set.
> >
> > Signed-off-by: Vivek Goyal <vgoyal at redhat.com>
> > ---
> > tools/virtiofsd/fuse_common.h | 5 +++++
> > tools/virtiofsd/fuse_lowlevel.c | 11 ++++++++++-
> > tools/virtiofsd/fuse_lowlevel.h | 3 ++-
> > tools/virtiofsd/passthrough_ll.c | 3 ++-
> > 4 files changed, 19 insertions(+), 3 deletions(-)
> >
> > diff --git a/tools/virtiofsd/fuse_common.h b/tools/virtiofsd/fuse_common.h
> > index 0c2665b977..8abac80098 100644
> > --- a/tools/virtiofsd/fuse_common.h
> > +++ b/tools/virtiofsd/fuse_common.h
> > @@ -377,6 +377,11 @@ struct fuse_file_info {
> > */
> > #define FUSE_CAP_SETXATTR_EXT (1 << 29)
> >
> > +/**
> > + * Indicates that file server supports extended struct fuse_setxattr_in
> > + */
> > +#define FUSE_CAP_SETXATTR_EXT (1 << 29)
> > +
>
> You already added that in 1/7 - but other than that,
Good catch. Do I need to repost patch/series due to this change or this
is something you can take care of while applying patches.
Vivek
>
>
> Reviewed-by: Dr. David Alan Gilbert <dgilbert at redhat.com>
>
> > /**
> > * Ioctl flags
> > *
> > diff --git a/tools/virtiofsd/fuse_lowlevel.c b/tools/virtiofsd/fuse_lowlevel.c
> > index c2b6ff1686..d1e24c013f 100644
> > --- a/tools/virtiofsd/fuse_lowlevel.c
> > +++ b/tools/virtiofsd/fuse_lowlevel.c
> > @@ -1439,7 +1439,9 @@ static void do_setxattr(fuse_req_t req, fuse_ino_t nodeid,
> > }
> >
> > if (req->se->op.setxattr) {
> > - req->se->op.setxattr(req, nodeid, name, value, arg->size, arg->flags);
> > + uint32_t setxattr_flags = setxattr_ext ? arg->setxattr_flags : 0;
> > + req->se->op.setxattr(req, nodeid, name, value, arg->size, arg->flags,
> > + setxattr_flags);
> > } else {
> > fuse_reply_err(req, ENOSYS);
> > }
> > @@ -1986,6 +1988,9 @@ static void do_init(fuse_req_t req, fuse_ino_t nodeid,
> > if (arg->flags & FUSE_HANDLE_KILLPRIV_V2) {
> > se->conn.capable |= FUSE_CAP_HANDLE_KILLPRIV_V2;
> > }
> > + if (arg->flags & FUSE_SETXATTR_EXT) {
> > + se->conn.capable |= FUSE_CAP_SETXATTR_EXT;
> > + }
> > #ifdef HAVE_SPLICE
> > #ifdef HAVE_VMSPLICE
> > se->conn.capable |= FUSE_CAP_SPLICE_WRITE | FUSE_CAP_SPLICE_MOVE;
> > @@ -2121,6 +2126,10 @@ static void do_init(fuse_req_t req, fuse_ino_t nodeid,
> > outarg.flags |= FUSE_HANDLE_KILLPRIV_V2;
> > }
> >
> > + if (se->conn.want & FUSE_CAP_SETXATTR_EXT) {
> > + outarg.flags |= FUSE_SETXATTR_EXT;
> > + }
> > +
> > fuse_log(FUSE_LOG_DEBUG, " INIT: %u.%u\n", outarg.major, outarg.minor);
> > fuse_log(FUSE_LOG_DEBUG, " flags=0x%08x\n", outarg.flags);
> > fuse_log(FUSE_LOG_DEBUG, " max_readahead=0x%08x\n", outarg.max_readahead);
> > diff --git a/tools/virtiofsd/fuse_lowlevel.h b/tools/virtiofsd/fuse_lowlevel.h
> > index 3bf786b034..4b4e8c9724 100644
> > --- a/tools/virtiofsd/fuse_lowlevel.h
> > +++ b/tools/virtiofsd/fuse_lowlevel.h
> > @@ -798,7 +798,8 @@ struct fuse_lowlevel_ops {
> > * fuse_reply_err
> > */
> > void (*setxattr)(fuse_req_t req, fuse_ino_t ino, const char *name,
> > - const char *value, size_t size, int flags);
> > + const char *value, size_t size, int flags,
> > + uint32_t setxattr_flags);
> >
> > /**
> > * Get an extended attribute
> > diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c
> > index ec91b3c133..9f5cd98fb5 100644
> > --- a/tools/virtiofsd/passthrough_ll.c
> > +++ b/tools/virtiofsd/passthrough_ll.c
> > @@ -2955,7 +2955,8 @@ out:
> > }
> >
> > static void lo_setxattr(fuse_req_t req, fuse_ino_t ino, const char *in_name,
> > - const char *value, size_t size, int flags)
> > + const char *value, size_t size, int flags,
> > + uint32_t extra_flags)
> > {
> > char procname[64];
> > const char *name;
> > --
> > 2.25.4
> >
> --
> Dr. David Alan Gilbert / dgilbert at redhat.com / Manchester, UK
>
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