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OpenZFS 7900 - zdb shouldn't print the path of a znode at verbosity < 5

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Authored by: Alan Somers <asomers@gmail.com>
Approved by: Dan McDonald <danmcd@omniti.com>
Reviewed by: Paul Dagnelie <pcd@delphix.com>
Reviewed by: Matt Ahrens <mahrens@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Ported-by: Giuseppe Di Natale <dinatale2@llnl.gov>

There are two reasons:
1) Finding a znode's path is slower than printing any other znode
   information at verbosity < 5.
2) On a corrupted pool like the one mentioned below, zdb will crash when it
   tries to determine the znode's path. But with this patch, zdb can still
   extract useful information from such pools.

OpenZFS-issue: https://www.illumos.org/issues/7900
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/2b0dee1
Closes #6016
This commit is contained in:
Alan Somers 2017-04-13 14:22:32 -07:00 committed by Brian Behlendorf
parent 87a275d97a
commit a5c3a1efaf
1 changed files with 8 additions and 12 deletions
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18
cmd/zdb/zdb.c
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@ -1824,23 +1824,19 @@ dump_znode(objset_t *os, uint64_t object, void *data, size_t size)
return;
}
error = zfs_obj_to_path(os, object, path, sizeof (path));
if (error != 0) {
(void) snprintf(path, sizeof (path), "\?\?\?<object#%llu>",
(u_longlong_t)object);
}
if (dump_opt['d'] < 3) {
(void) printf("\t%s\n", path);
(void) sa_handle_destroy(hdl);
return;
}
z_crtime = (time_t)crtm[0];
z_atime = (time_t)acctm[0];
z_mtime = (time_t)modtm[0];
z_ctime = (time_t)chgtm[0];
if (dump_opt['d'] > 4) {
error = zfs_obj_to_path(os, object, path, sizeof (path));
if (error != 0) {
(void) snprintf(path, sizeof (path),
"\?\?\?<object#%llu>", (u_longlong_t)object);
}
(void) printf("\tpath %s\n", path);
}
dump_uidgid(os, uid, gid);
(void) printf("\tatime %s", ctime(&z_atime));
(void) printf("\tmtime %s", ctime(&z_mtime));