I'm porting an existing application to use DFS (DAOS v2.0.2) instead of POSIX and need help understanding the error messages printed to the console.
The code is using dfs_lookup() to retrieve the struct stat of a file. Note the implementation cannot use dfs_stat() as it requires valid values for fields such as st_ino that dfs_stat() does not provide. The code in question is:
int
d_lstat(const char * restrict path, struct stat * restrict sb)
{
int rc;
dfs_obj_t *obj = NULL;
rc = dfs_lookup(dfs, path, O_RDONLY, &obj, NULL, sb);
...
If the file path exists (e.g. "/"), this works. But if the path, doesn't exist (e.g. "//.Trash"), the call to dfs_lookup() does not return. Instead, the console endlessly prints messages like:
04/04-16:28:50.90 xxxxx DAOS[1178648/1178648/0] external ERR # [6937851.329315] mercury->msg: [error] /builddir/build/BUILD/mercury-2.1.0rc4/src/na/na_ofi.c:2972
# na_ofi_msg_send(): fi_tsend() failed, rc: -13 (Permission denied)
04/04-16:28:50.90 xxxxx DAOS[1178648/1178648/0] external ERR # [6937851.329374] mercury->hg: [error] /builddir/build/BUILD/mercury-2.1.0rc4/src/mercury_core.c:2727
# hg_core_forward_na(): Could not post send for input buffer (NA_ACCESS)
04/04-16:28:50.90 xxxxx DAOS[1178648/1178648/0] hg ERR src/cart/crt_hg.c:1104 crt_hg_req_send_cb(0x1d0cd40) [opc=0x4070001 (DAOS) rpcid=0x63f8133700000008 rank:tag=1:2] RPC failed; rc: DER_HG(-1020): 'Transport layer mercury error'
04/04-16:28:50.90 xxxxx DAOS[1178648/1178648/0] object ERR src/object/cli_shard.c:889 dc_rw_cb() RPC 1 failed, DER_HG(-1020): 'Transport layer mercury error'
Am I mis-using dfs_lookup() or using it incorrectly?
--chuck
