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Add skip-likely-huge print option

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Add an option to skip printing structures that are likely to be so huge
that the print output becomes completely unwieldly on large systems.

Signed-off-by: Zach Brown <zab@versity.com>
This commit is contained in:
Zach Brown
2022-07-06 15:07:57 -07:00
parent 15cf3c4134
commit 49df98f5a8
2 changed files with 51 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files
utils/src/print.c
+36 -19
View File
@@ -8,6 +8,7 @@
#include <errno.h>
#include <string.h>
#include <stdarg.h>
#include <stdbool.h>
#include <ctype.h>
#include <uuid/uuid.h>
#include <sys/socket.h>
@@ -989,9 +990,10 @@ static void print_super_block(struct scoutfs_super_block *super, u64 blkno)
struct print_args {
char *meta_device;
bool skip_likely_huge;
};
static int print_volume(int fd)
static int print_volume(int fd, struct print_args *args)
{
struct scoutfs_super_block *super = NULL;
struct print_recursion_args pa;
@@ -1041,23 +1043,26 @@ static int print_volume(int fd)
ret = err;
}
for (i = 0; i < array_size(super->meta_alloc); i++) {
snprintf(str, sizeof(str), "meta_alloc[%u]", i);
err = print_btree(fd, super, str, &super->meta_alloc[i].root,
if (!args->skip_likely_huge) {
for (i = 0; i < array_size(super->meta_alloc); i++) {
snprintf(str, sizeof(str), "meta_alloc[%u]", i);
err = print_btree(fd, super, str, &super->meta_alloc[i].root,
print_alloc_item, NULL);
if (err && !ret)
ret = err;
}
err = print_btree(fd, super, "data_alloc", &super->data_alloc.root,
print_alloc_item, NULL);
if (err && !ret)
ret = err;
}
err = print_btree(fd, super, "data_alloc", &super->data_alloc.root,
print_alloc_item, NULL);
if (err && !ret)
ret = err;
err = print_btree(fd, super, "srch_root", &super->srch_root,
print_srch_root_item, NULL);
if (err && !ret)
ret = err;
err = print_btree(fd, super, "logs_root", &super->logs_root,
print_log_trees_item, NULL);
if (err && !ret)
@@ -1065,19 +1070,23 @@ static int print_volume(int fd)
pa.super = super;
pa.fd = fd;
err = print_btree_leaf_items(fd, super, &super->srch_root.ref,
print_srch_root_files, &pa);
if (err && !ret)
ret = err;
if (!args->skip_likely_huge) {
err = print_btree_leaf_items(fd, super, &super->srch_root.ref,
print_srch_root_files, &pa);
if (err && !ret)
ret = err;
}
err = print_btree_leaf_items(fd, super, &super->logs_root.ref,
print_log_trees_roots, &pa);
if (err && !ret)
ret = err;
err = print_btree(fd, super, "fs_root", &super->fs_root,
print_fs_item, NULL);
if (err && !ret)
ret = err;
if (!args->skip_likely_huge) {
err = print_btree(fd, super, "fs_root", &super->fs_root,
print_fs_item, NULL);
if (err && !ret)
ret = err;
}
out:
free(super);
@@ -1098,7 +1107,7 @@ static int do_print(struct print_args *args)
return ret;
}
ret = print_volume(fd);
ret = print_volume(fd, args);
close(fd);
return ret;
};
@@ -1108,6 +1117,9 @@ static int parse_opt(int key, char *arg, struct argp_state *state)
struct print_args *args = state->input;
switch (key) {
case 'S':
args->skip_likely_huge = true;
break;
case ARGP_KEY_ARG:
if (!args->meta_device)
args->meta_device = strdup_or_error(state, arg);
@@ -1125,8 +1137,13 @@ static int parse_opt(int key, char *arg, struct argp_state *state)
return 0;
}
static struct argp_option options[] = {
{ "skip-likely-huge", 'S', NULL, 0, "Skip large structures to minimize output size"},
{ NULL }
};
static struct argp argp = {
NULL,
options,
parse_opt,
"META-DEV",
"Print metadata structures"