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virtiofsd: Add support for extended setxattr

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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@redhat.com>
Message-Id: <20210622150852.1507204-4-vgoyal@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
  Fixed up double def in fuse_common.h
This commit is contained in:
Vivek Goyal 2021-06-22 11:08:48 -04:00 committed by Dr. David Alan Gilbert
parent 5290fb625d
commit c46ef954fa
3 changed files with 14 additions and 3 deletions
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11
tools/virtiofsd/fuse_lowlevel.c
View File

@ -1445,7 +1445,9 @@ 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);
}
@ -1992,6 +1994,9 @@ 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;
@ -2127,6 +2132,10 @@ 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);

3
tools/virtiofsd/fuse_lowlevel.h
View File

@ -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

3
tools/virtiofsd/passthrough_ll.c
View File

@ -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;