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Add a very limited DDB dumpon(8)-alike to MI dumper code

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This allows ddb(4) commands to construct a static dumperinfo during
panic/debug and invoke doadump(false) using the provided dumper
configuration (always inserted first in the list).

The intended usecase is a ddb(4)-time netdump(4) command.

Reviewed by:	markj (earlier version)
Differential Revision:	https://reviews.freebsd.org/D21448
This commit is contained in:
Conrad Meyer 2019-10-17 18:29:44 +00:00
parent 6d567ec2da
commit addccb8c51
2 changed files with 18 additions and 0 deletions
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14
sys/kern/kern_shutdown.c
View File

@ -1267,6 +1267,20 @@ cleanup:
return (error);
}
#ifdef DDB
void
dumper_ddb_insert(struct dumperinfo *newdi)
{
TAILQ_INSERT_HEAD(&dumper_configs, newdi, di_next);
}
void
dumper_ddb_remove(struct dumperinfo *di)
{
TAILQ_REMOVE(&dumper_configs, di, di_next);
}
#endif
static bool
dumper_config_match(const struct dumperinfo *di, const char *devname,
const struct diocskerneldump_arg *kda)

4
sys/sys/conf.h
View File

@ -366,6 +366,10 @@ int dumper_insert(const struct dumperinfo *di_template, const char *devname,
const struct diocskerneldump_arg *kda);
int dumper_remove(const char *devname, const struct diocskerneldump_arg *kda);
/* For ddb(4)-time use only. */
void dumper_ddb_insert(struct dumperinfo *);
void dumper_ddb_remove(struct dumperinfo *);
int dump_start(struct dumperinfo *di, struct kerneldumpheader *kdh);
int dump_append(struct dumperinfo *, void *, vm_offset_t, size_t);
int dump_write(struct dumperinfo *, void *, vm_offset_t, off_t, size_t);