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virtiofsd: Let meson check for statx.stx_mnt_id

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In virtiofsd, we assume that the presence of the STATX_MNT_ID macro
implies existence of the statx.stx_mnt_id field.  Unfortunately, that is
not necessarily the case: glibc has introduced the macro in its commit
88a2cf6c4bab6e94a65e9c0db8813709372e9180, but the statx.stx_mnt_id field
is still missing from its own headers.

Let meson.build actually chek for both STATX_MNT_ID and
statx.stx_mnt_id, and set CONFIG_STATX_MNT_ID if both are present.
Then, use this config macro in virtiofsd.

Closes: https://gitlab.com/qemu-project/qemu/-/issues/882
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20220223092340.9043-1-hreitz@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Hanna Reitz 2022-02-23 10:23:40 +01:00 • committed by Dr. David Alan Gilbert
parent acbcd06e5d
commit 4ce7a08d3e
2 changed files with 14 additions and 1 deletions
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2
tools/virtiofsd/passthrough_ll.c
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@ -1039,7 +1039,7 @@ static int do_statx(struct lo_data *lo, int dirfd, const char *pathname,
{
int res;
#if defined(CONFIG_STATX) && defined(STATX_MNT_ID)
#if defined(CONFIG_STATX) && defined(CONFIG_STATX_MNT_ID)
if (lo->use_statx) {
struct statx statxbuf;