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Add the "-t" option to geom(8) utility, to display geoms hierarchy.

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Sample output:

% geom -t
Geom             Class      Provider
da0              DISK       da0
  da0            PART       da0s1
    da0s1        PART       da0s1a
      ffs.da0s1a VFS
      da0s1a     DEV
    da0s1        DEV
  da0            DEV
da1              DISK       da1
  swap           SWAP
  da1            DEV
cd0              DISK       cd0
  cd0            DEV

Reviewed by:	oshogbo
Approved by:	re (kib)
MFC after:	2 weeks
Relnotes:	yes
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D17151
This commit is contained in:
Edward Tomasz Napierala 2018-09-14 15:29:45 +00:00
parent c51b7ab9e3
commit 6a02738229
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=338684
2 changed files with 142 additions and 4 deletions
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6
sbin/geom/core/geom.8
View File

@ -24,7 +24,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd September 13, 2018
.Dd September 14, 2018
.Dt GEOM 8
.Os
.Sh NAME
@ -55,6 +55,8 @@
.Nm
.Fl p
.Ar provider-name
.Nm
.Fl t
.Sh DESCRIPTION
The
.Nm
@ -111,6 +113,8 @@ Additional options include:
.It Fl p Ar provider-name
Print detailed information about the geom which provides
.Ar provider-name .
.It Fl t
Display geoms hierarchy as a tree.
.El
.Pp
Class-specific commands are implemented as shared libraries which

140
sbin/geom/core/geom.c
View File

@ -66,8 +66,11 @@ static uint32_t *version = NULL;
static int verbose = 0;
static struct g_command *class_commands = NULL;
#define GEOM_CLASS_CMDS 0x01
#define GEOM_STD_CMDS 0x02
#define GEOM_CLASS_CMDS 0x01
#define GEOM_STD_CMDS 0x02
#define GEOM_CLASS_WIDTH 10
static struct g_command *find_command(const char *cmdstr, int flags);
static void list_one_geom_by_provider(const char *provider_name);
static int std_available(const char *name);
@ -149,6 +152,7 @@ usage(void)
if (class_name == NULL) {
fprintf(stderr, "usage: geom <class> <command> [options]\n");
fprintf(stderr, " geom -p <provider-name>\n");
fprintf(stderr, " geom -t\n");
exit(EXIT_FAILURE);
} else {
struct g_command *cmd;
@ -672,22 +676,142 @@ find_geom_by_provider(struct gmesh *mesh, const char *name)
return (NULL);
}
static int
compute_tree_width_geom(struct gmesh *mesh, struct ggeom *gp, int indent)
{
struct gclass *classp2;
struct ggeom *gp2;
struct gconsumer *cp2;
struct gprovider *pp;
int max_width, width;
max_width = width = indent + strlen(gp->lg_name);
LIST_FOREACH(pp, &gp->lg_provider, lg_provider) {
LIST_FOREACH(classp2, &mesh->lg_class, lg_class) {
LIST_FOREACH(gp2, &classp2->lg_geom, lg_geom) {
LIST_FOREACH(cp2,
&gp2->lg_consumer, lg_consumer) {
if (pp != cp2->lg_provider)
continue;
width = compute_tree_width_geom(mesh,
gp2, indent + 2);
if (width > max_width)
max_width = width;
}
}
}
}
return (max_width);
}
static int
compute_tree_width(struct gmesh *mesh)
{
struct gclass *classp;
struct ggeom *gp;
int max_width, width;
max_width = width = 0;
LIST_FOREACH(classp, &mesh->lg_class, lg_class) {
LIST_FOREACH(gp, &classp->lg_geom, lg_geom) {
if (!LIST_EMPTY(&gp->lg_consumer))
continue;
width = compute_tree_width_geom(mesh, gp, 0);
if (width > max_width)
max_width = width;
}
}
return (max_width);
}
static void
show_tree_geom(struct gmesh *mesh, struct ggeom *gp, int indent, int width)
{
struct gclass *classp2;
struct ggeom *gp2;
struct gconsumer *cp2;
struct gprovider *pp;
if (LIST_EMPTY(&gp->lg_provider)) {
printf("%*s%-*.*s %-*.*s\n", indent, "",
width - indent, width - indent, gp->lg_name,
GEOM_CLASS_WIDTH, GEOM_CLASS_WIDTH, gp->lg_class->lg_name);
return;
}
LIST_FOREACH(pp, &gp->lg_provider, lg_provider) {
printf("%*s%-*.*s %-*.*s %s\n", indent, "",
width - indent, width - indent, gp->lg_name,
GEOM_CLASS_WIDTH, GEOM_CLASS_WIDTH, gp->lg_class->lg_name,
pp->lg_name);
LIST_FOREACH(classp2, &mesh->lg_class, lg_class) {
LIST_FOREACH(gp2, &classp2->lg_geom, lg_geom) {
LIST_FOREACH(cp2,
&gp2->lg_consumer, lg_consumer) {
if (pp != cp2->lg_provider)
continue;
show_tree_geom(mesh, gp2,
indent + 2, width);
}
}
}
}
}
static void
show_tree(void)
{
struct gmesh mesh;
struct gclass *classp;
struct ggeom *gp;
int error, width;
error = geom_gettree(&mesh);
if (error != 0)
errc(EXIT_FAILURE, error, "Cannot get GEOM tree");
width = compute_tree_width(&mesh);
printf("%-*.*s %-*.*s %s\n",
width, width, "Geom",
GEOM_CLASS_WIDTH, GEOM_CLASS_WIDTH, "Class",
"Provider");
LIST_FOREACH(classp, &mesh.lg_class, lg_class) {
LIST_FOREACH(gp, &classp->lg_geom, lg_geom) {
if (!LIST_EMPTY(&gp->lg_consumer))
continue;
show_tree_geom(&mesh, gp, 0, width);
}
}
}
int
main(int argc, char *argv[])
{
char *provider_name;
bool tflag;
int ch;
provider_name = NULL;
tflag = false;
if (strcmp(getprogname(), "geom") == 0) {
while ((ch = getopt(argc, argv, "hp:")) != -1) {
while ((ch = getopt(argc, argv, "hp:t")) != -1) {
switch (ch) {
case 'p':
provider_name = strdup(optarg);
if (provider_name == NULL)
err(1, "strdup");
break;
case 't':
tflag = true;
break;
case 'h':
default:
usage();
@ -699,11 +823,21 @@ main(int argc, char *argv[])
*/
}
if (tflag && provider_name != NULL) {
errx(EXIT_FAILURE,
"At most one of -P and -t may be specified.");
}
if (provider_name != NULL) {
list_one_geom_by_provider(provider_name);
return (0);
}
if (tflag) {
show_tree();
return (0);
}
get_class(&argc, &argv);
run_command(argc, argv);
/* NOTREACHED */