static void v9fs_wstat(void *opaque) { int32_t fid; int err = 0; int16_t unused; V9fsStat v9stat; size_t offset = 7; struct stat stbuf; V9fsFidState *fidp; V9fsPDU *pdu = opaque; V9fsState *s = pdu->s; pdu_unmarshal(pdu, offset, "dwS", &fid, &unused, &v9stat); fidp = get_fid(pdu, fid); if (fidp == NULL) { err = -EINVAL; goto out_nofid; } /* do we need to sync the file? */ if (donttouch_stat(&v9stat)) { err = v9fs_co_fsync(pdu, fidp, 0); goto out; } if (v9stat.mode != -1) { uint32_t v9_mode; err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); if (err < 0) { goto out; } v9_mode = stat_to_v9mode(&stbuf); if ((v9stat.mode & P9_STAT_MODE_TYPE_BITS) != (v9_mode & P9_STAT_MODE_TYPE_BITS)) { /* Attempting to change the type */ err = -EIO; goto out; } err = v9fs_co_chmod(pdu, &fidp->path, v9mode_to_mode(v9stat.mode, &v9stat.extension)); if (err < 0) { goto out; } } if (v9stat.mtime != -1 || v9stat.atime != -1) { struct timespec times[2]; if (v9stat.atime != -1) { times[0].tv_sec = v9stat.atime; times[0].tv_nsec = 0; } else { times[0].tv_nsec = UTIME_OMIT; } if (v9stat.mtime != -1) { times[1].tv_sec = v9stat.mtime; times[1].tv_nsec = 0; } else { times[1].tv_nsec = UTIME_OMIT; } err = v9fs_co_utimensat(pdu, &fidp->path, times); if (err < 0) { goto out; } } if (v9stat.n_gid != -1 || v9stat.n_uid != -1) { err = v9fs_co_chown(pdu, &fidp->path, v9stat.n_uid, v9stat.n_gid); if (err < 0) { goto out; } } if (v9stat.name.size != 0) { err = v9fs_complete_rename(pdu, fidp, -1, &v9stat.name); if (err < 0) { goto out; } } if (v9stat.length != -1) { err = v9fs_co_truncate(pdu, &fidp->path, v9stat.length); if (err < 0) { goto out; } } err = offset; out: put_fid(pdu, fidp); out_nofid: v9fs_stat_free(&v9stat); complete_pdu(s, pdu, err); }