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9p: xattr: Properly translate xattrcreate flags

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As with unlinkat, these flags come from the client and need to
be translated to their host values. The protocol values happen
to match linux, but that need not be true in general.

Signed-off-by: Keno Fischer <keno@juliacomputing.com>
Signed-off-by: Greg Kurz <groug@kaod.org>
This commit is contained in:
Keno Fischer 2018-06-07 12:17:22 +02:00 committed by Greg Kurz
parent 67e8734574
commit aca6897fba
2 changed files with 19 additions and 2 deletions
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17
hw/9pfs/9p.c
View File

@ -3327,7 +3327,7 @@ out_nofid:
static void coroutine_fn v9fs_xattrcreate(void *opaque)
{
int flags;
int flags, rflags = 0;
int32_t fid;
uint64_t size;
ssize_t err = 0;
@ -3344,6 +3344,19 @@ static void coroutine_fn v9fs_xattrcreate(void *opaque)
}
trace_v9fs_xattrcreate(pdu->tag, pdu->id, fid, name.data, size, flags);
if (flags & ~(P9_XATTR_CREATE | P9_XATTR_REPLACE)) {
err = -EINVAL;
goto out_nofid;
}
if (flags & P9_XATTR_CREATE) {
rflags |= XATTR_CREATE;
}
if (flags & P9_XATTR_REPLACE) {
rflags |= XATTR_REPLACE;
}
if (size > XATTR_SIZE_MAX) {
err = -E2BIG;
goto out_nofid;
@ -3365,7 +3378,7 @@ static void coroutine_fn v9fs_xattrcreate(void *opaque)
xattr_fidp->fs.xattr.copied_len = 0;
xattr_fidp->fs.xattr.xattrwalk_fid = false;
xattr_fidp->fs.xattr.len = size;
xattr_fidp->fs.xattr.flags = flags;
xattr_fidp->fs.xattr.flags = rflags;
v9fs_string_init(&xattr_fidp->fs.xattr.name);
v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name);
xattr_fidp->fs.xattr.value = g_malloc0(size);

4
hw/9pfs/9p.h
View File

@ -169,6 +169,10 @@ typedef struct V9fsConf
char *fsdev_id;
} V9fsConf;
/* 9p2000.L xattr flags (matches Linux values) */
#define P9_XATTR_CREATE 1
#define P9_XATTR_REPLACE 2
typedef struct V9fsXattr
{
uint64_t copied_len;