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fuse-overlayfs: create opaque whiteout file for dirs

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Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
This commit is contained in:
Giuseppe Scrivano 2019-04-27 09:31:59 +02:00
parent 064452bfba
commit 29877f7edf
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1 changed files with 9 additions and 4 deletions
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13
main.c
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@ -417,15 +417,20 @@ has_prefix (const char *str, const char *pref)
static int
set_fd_opaque (int fd)
{
if (fsetxattr (fd, PRIVILEGED_OPAQUE_XATTR, "y", 1, 0) < 0)
cleanup_close int opq_whiteout_fd = -1;
int ret;
ret = fsetxattr (fd, PRIVILEGED_OPAQUE_XATTR, "y", 1, 0);
if (ret < 0)
{
if (errno == ENOTSUP)
return 0;
goto create_opq_whiteout;
if (errno != EPERM || fsetxattr (fd, OPAQUE_XATTR, "y", 1, 0) < 0 && errno != ENOTSUP)
return -1;
}
return 0;
create_opq_whiteout:
opq_whiteout_fd = TEMP_FAILURE_RETRY (openat (fd, OPAQUE_WHITEOUT, O_CREAT|O_WRONLY|O_NONBLOCK, 0700));
return (opq_whiteout_fd >= 0 || ret == 0) ? 0 : -1;
}
static int