Add the ffs structures introspection functions for ddb.

Show the b_dep value for the buffer in the show buffer command.
Add a comand to dump the dirty/clean buffer list for vnode.

Reviewed by:	tegge
Tested and used by:   pho
MFC after:   1 month

1 files changed, 20 insertions, 0 deletions

diff --git a/share/man/man4/ddb.4 b/share/man/man4/ddb.4
index 69f11ef..838ecff 100644
--- a/share/man/man4/ddb.4
+++ b/share/man/man4/ddb.4
@@ -610,6 +610,13 @@ See the
 header file for more details on the exact meaning of the structure fields.
 .\"
 .Pp
+.It Ic show Cm ffs Op Ar addr
+Show brief information about ffs mount at the address
+.Ar addr ,
+if argument is given.
+Otherwise, provides the summary about each ffs mount.
+.\"
+.Pp
 .It Ic show Cm file Ar addr
 Show information about the file structure
 .Vt struct file
@@ -642,6 +649,14 @@ The second one is the name of the interrupt/trap handler.
 Those functions are machine dependent.
 .\"
 .Pp
+.It Ic show Cm inodedeps Op Ar addr
+Show brief information about each inodedep structure.
+If
+.Ar addr
+is given, only inodedeps belonging to the fs located at the
+supplied address are shown.
+.\"
+.Pp
 .It Ic show Cm inpcb Ar addr
 Show information on IP Control Block
 .Vt struct in_pcb
@@ -1019,6 +1034,11 @@ For the exact interpretation of the output, look at the
 header file.
 .\"
 .Pp
+.It Ic show Cm vnodebufs Ar addr
+Shows clean/dirty buffer lists of the vnode located at
+.Ar addr .
+.\"
+.Pp
 .It Ic show Cm watches
 Displays all watchpoints.
 Shows watchpoints set with "watch" command.