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#include <linux/blkdev.h>
#include <linux/types.h>
#include <linux/kdb.h>
#include <linux/kdbprivate.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <scsi.h>
#include <hosts.h>
MODULE_AUTHOR("SGI");
MODULE_DESCRIPTION("Debug VM information");
MODULE_LICENSE("GPL");
struct __vmflags {
unsigned long mask;
char *name;
} vmflags[] = {
{ VM_READ, "READ" },
{ VM_WRITE, "WRITE" },
{ VM_EXEC, "EXEC" },
{ VM_SHARED, "SHARED" },
{ VM_MAYREAD, "MAYREAD" },
{ VM_MAYWRITE, "MAYWRITE" },
{ VM_MAYEXEC, "MAYEXEC" },
{ VM_MAYSHARE, "MAYSHARE" },
{ VM_GROWSDOWN, "GROWSDOWN" },
{ VM_GROWSUP, "GROWSUP" },
{ VM_SHM, "SHM" },
{ VM_DENYWRITE, "DENYWRITE" },
{ VM_EXECUTABLE, "EXECUTABLE" },
{ VM_LOCKED, "LOCKED" },
{ VM_IO , "IO " },
{ 0, "" }
};
static int
kdbm_vm(int argc, const char **argv, const char **envp, struct pt_regs *regs)
{
struct vm_area_struct vp;
unsigned long addr;
long offset=0;
int nextarg;
int diag;
struct __vmflags *tp;
if (argc != 1)
return KDB_ARGCOUNT;
nextarg = 1;
if ((diag = kdbgetaddrarg(argc, argv, &nextarg, &addr, &offset, NULL, regs)) ||
(diag = kdb_getarea(vp, addr)))
return(diag);
kdb_printf("struct vm_area_struct at 0x%lx for %d bytes\n",
addr, (int)sizeof(struct vm_area_struct));
kdb_printf("vm_start = 0x%lx vm_end = 0x%lx\n", vp.vm_start, vp.vm_end);
kdb_printf("page_prot = 0x%lx\n", pgprot_val(vp.vm_page_prot));
kdb_printf("flags: ");
for(tp=vmflags; tp->mask; tp++) {
if (vp.vm_flags & tp->mask) {
kdb_printf("%s ", tp->name);
}
}
kdb_printf("\n");
return 0;
}
static int
kdbm_fp(int argc, const char **argv, const char **envp, struct pt_regs *regs)
{
struct file f;
struct inode i;
struct dentry d;
int nextarg;
unsigned long addr;
long offset;
int diag;
if (argc != 1)
return KDB_ARGCOUNT;
nextarg = 1;
if ((diag = kdbgetaddrarg(argc, argv, &nextarg, &addr, &offset, NULL, regs)) ||
(diag = kdb_getarea(f, addr)) ||
(diag = kdb_getarea(d, (unsigned long)f.f_dentry)) ||
(diag = kdb_getarea(i, (unsigned long)d.d_inode)))
return(diag);
kdb_printf("name.name 0x%p name.len %d\n",
d.d_name.name, d.d_name.len);
kdb_printf("File Pointer at 0x%lx\n", addr);
kdb_printf(" f_list.nxt = 0x%p f_list.prv = 0x%p\n",
f.f_list.next, f.f_list.prev);
kdb_printf(" f_dentry = 0x%p f_op = 0x%p\n",
f.f_dentry, f.f_op);
kdb_printf(" f_count = %d f_flags = 0x%x f_mode = 0x%x\n",
f.f_count.counter, f.f_flags, f.f_mode);
kdb_printf(" f_pos = %Ld f_reada = %ld f_ramax = %ld\n",
f.f_pos, f.f_reada, f.f_ramax);
kdb_printf(" f_raend = %ld f_ralen = %ld f_rawin = %ld\n\n",
f.f_raend, f.f_ralen, f.f_rawin);
kdb_printf("\nDirectory Entry at 0x%p\n", f.f_dentry);
kdb_printf(" d_name.len = %d d_name.name = 0x%p>\n",
d.d_name.len, d.d_name.name);
kdb_printf(" d_count = %d d_flags = 0x%x d_inode = 0x%p\n",
atomic_read(&d.d_count), d.d_flags, d.d_inode);
kdb_printf(" d_hash.nxt = 0x%p d_hash.prv = 0x%p\n",
d.d_hash.next, d.d_hash.prev);
kdb_printf(" d_lru.nxt = 0x%p d_lru.prv = 0x%p\n",
d.d_lru.next, d.d_lru.prev);
kdb_printf(" d_child.nxt = 0x%p d_child.prv = 0x%p\n",
d.d_child.next, d.d_child.prev);
kdb_printf(" d_subdirs.nxt = 0x%p d_subdirs.prv = 0x%p\n",
d.d_subdirs.next, d.d_subdirs.prev);
kdb_printf(" d_alias.nxt = 0x%p d_alias.prv = 0x%p\n",
d.d_alias.next, d.d_alias.prev);
kdb_printf(" d_op = 0x%p d_sb = 0x%p\n\n",
d.d_op, d.d_sb);
kdb_printf("\nInode Entry at 0x%p\n", d.d_inode);
kdb_printf(" i_mode = 0x%x i_nlink = %d i_rdev = 0x%x\n",
i.i_mode, i.i_nlink, i.i_rdev);
kdb_printf(" i_ino = %ld i_count = %d i_dev = 0x%x\n",
i.i_ino, atomic_read(&i.i_count), i.i_dev);
kdb_printf(" i_hash.nxt = 0x%p i_hash.prv = 0x%p\n",
i.i_hash.next, i.i_hash.prev);
kdb_printf(" i_list.nxt = 0x%p i_list.prv = 0x%p\n",
i.i_list.next, i.i_list.prev);
kdb_printf(" i_dentry.nxt = 0x%p i_dentry.prv = 0x%p\n",
i.i_dentry.next, i.i_dentry.prev);
return 0;
}
static int
kdbm_dentry(int argc, const char **argv, const char **envp, struct pt_regs *regs)
{
struct dentry d;
int nextarg;
unsigned long addr;
long offset;
int diag;
if (argc != 1)
return KDB_ARGCOUNT;
nextarg = 1;
if ((diag = kdbgetaddrarg(argc, argv, &nextarg, &addr, &offset, NULL, regs)) ||
(diag = kdb_getarea(d, addr)))
return diag;
kdb_printf("Dentry at 0x%lx\n", addr);
kdb_printf(" d_name.len = %d d_name.name = 0x%p>\n",
d.d_name.len, d.d_name.name);
kdb_printf(" d_count = %d d_flags = 0x%x d_inode = 0x%p\n",
atomic_read(&d.d_count), d.d_flags, d.d_inode);
kdb_printf(" d_hash.nxt = 0x%p d_hash.prv = 0x%p\n",
d.d_hash.next, d.d_hash.prev);
kdb_printf(" d_lru.nxt = 0x%p d_lru.prv = 0x%p\n",
d.d_lru.next, d.d_lru.prev);
kdb_printf(" d_child.nxt = 0x%p d_child.prv = 0x%p\n",
d.d_child.next, d.d_child.prev);
kdb_printf(" d_subdirs.nxt = 0x%p d_subdirs.prv = 0x%p\n",
d.d_subdirs.next, d.d_subdirs.prev);
kdb_printf(" d_alias.nxt = 0x%p d_alias.prv = 0x%p\n",
d.d_alias.next, d.d_alias.prev);
kdb_printf(" d_op = 0x%p d_sb = 0x%p\n\n",
d.d_op, d.d_sb);
return 0;
}
static int
kdbm_sh(int argc, const char **argv, const char **envp, struct pt_regs *regs)
{
int diag;
int nextarg;
unsigned long addr;
long offset =0L;
struct Scsi_Host sh;
if (argc != 1)
return KDB_ARGCOUNT;
nextarg = 1;
if ((diag = kdbgetaddrarg(argc, argv, &nextarg, &addr, &offset, NULL, regs)) ||
(diag = kdb_getarea(sh, addr)))
return diag;
kdb_printf("Scsi_Host at 0x%lx\n", addr);
kdb_printf("next = 0x%p host_queue = 0x%p\n",
sh.next, sh.host_queue);
kdb_printf("ehandler = 0x%p eh_wait = 0x%p en_notify = 0x%p eh_action = 0x%p\n",
sh.ehandler, sh.eh_wait, sh.eh_notify, sh.eh_action);
kdb_printf("eh_active = 0x%d host_wait = 0x%p hostt = 0x%p host_busy = %d\n",
sh.eh_active, &sh.host_wait, sh.hostt, sh.host_active.counter);
kdb_printf("host_failed = %d extra_bytes = %d host_no = %d resetting = %d\n",
sh.host_failed, sh.extra_bytes, sh.host_no, sh.resetting);
kdb_printf("max id/lun/channel = [%d/%d/%d] this_id = %d\n",
sh.max_id, sh.max_lun, sh.max_channel, sh.this_id);
kdb_printf("can_queue = %d cmd_per_lun = %d sg_tablesize = %d u_isa_dma = %d\n",
sh.can_queue, sh.cmd_per_lun, sh.sg_tablesize, sh.unchecked_isa_dma);
kdb_printf("host_blocked = %d reverse_ordering = %d \n",
sh.host_blocked, sh.reverse_ordering);
return 0;
}
static int
kdbm_sd(int argc, const char **argv, const char **envp, struct pt_regs *regs)
{
int diag;
int nextarg;
unsigned long addr;
long offset =0L;
struct scsi_device sd;
if (argc != 1)
return KDB_ARGCOUNT;
nextarg = 1;
if ((diag = kdbgetaddrarg(argc, argv, &nextarg, &addr, &offset, NULL, regs)) ||
(diag = kdb_getarea(sd, addr)))
return diag;
kdb_printf("scsi_device at 0x%lx\n", addr);
kdb_printf("next = 0x%p prev = 0x%p host = 0x%p\n",
sd.next, sd.prev, sd.host);
kdb_printf("device_busy = %d device_queue 0x%p\n",
sd.device_busy, sd.device_queue);
kdb_printf("id/lun/chan = [%d/%d/%d] single_lun = %d device_blocked = %d\n",
sd.id, sd.lun, sd.channel, sd.single_lun, sd.device_blocked);
kdb_printf("queue_depth = %d current_tag = %d scsi_level = %d\n",
sd.queue_depth, sd.current_tag, sd.scsi_level);
kdb_printf("%8.8s %16.16s %4.4s\n", sd.vendor, sd.model, sd.rev);
return 0;
}
static char *
str_rq_status(int rq_status)
{
switch (rq_status) {
case RQ_INACTIVE:
return "RQ_INACTIVE";
case RQ_ACTIVE:
return "RQ_ACTIVE";
case RQ_SCSI_BUSY:
return "RQ_SCSI_BUSY";
case RQ_SCSI_DONE:
return "RQ_SCSI_DONE";
case RQ_SCSI_DISCONNECTING:
return "RQ_SCSI_DISCONNECTING";
default:
return "UNKNOWN";
}
}
static int
kdbm_sc(int argc, const char **argv, const char **envp, struct pt_regs *regs)
{
int diag;
int nextarg;
unsigned long addr;
long offset =0L;
struct scsi_cmnd sc;
if (argc != 1)
return KDB_ARGCOUNT;
nextarg = 1;
if ((diag = kdbgetaddrarg(argc, argv, &nextarg, &addr, &offset, NULL, regs)) ||
(diag = kdb_getarea(sc, addr)))
return diag;
kdb_printf("scsi_cmnd at 0x%lx\n", addr);
kdb_printf("host = 0x%p state = %d owner = %d device = 0x%p\nb",
sc.host, sc.state, sc.owner, sc.device);
kdb_printf("next = 0x%p reset_chain = 0x%p eh_state = %d done = 0x%p\n",
sc.next, sc.reset_chain, sc.eh_state, sc.done);
kdb_printf("serial_number = %ld serial_num_at_to = %ld retries = %d timeout = %d\n",
sc.serial_number, sc.serial_number_at_timeout, sc.retries, sc.timeout);
kdb_printf("id/lun/cmnd = [%d/%d/%d] cmd_len = %d old_cmd_len = %d\n",
sc.target, sc.lun, sc.channel, sc.cmd_len, sc.old_cmd_len);
kdb_printf("cmnd = [%2.2x/%2.2x/%2.2x/%2.2x/%2.2x/%2.2x/%2.2x/%2.2x/%2.2x/%2.2x/%2.2x/%2.2x]\n",
sc.cmnd[0], sc.cmnd[1], sc.cmnd[2], sc.cmnd[3], sc.cmnd[4],
sc.cmnd[5], sc.cmnd[6], sc.cmnd[7], sc.cmnd[8], sc.cmnd[9],
sc.cmnd[10], sc.cmnd[11]);
kdb_printf("data_cmnd = [%2.2x/%2.2x/%2.2x/%2.2x/%2.2x/%2.2x/%2.2x/%2.2x/%2.2x/%2.2x/%2.2x/%2.2x]\n",
sc.data_cmnd[0], sc.data_cmnd[1], sc.data_cmnd[2], sc.data_cmnd[3], sc.data_cmnd[4],
sc.data_cmnd[5], sc.data_cmnd[6], sc.data_cmnd[7], sc.data_cmnd[8], sc.data_cmnd[9],
sc.data_cmnd[10], sc.data_cmnd[11]);
kdb_printf("request_buffer = 0x%p bh_next = 0x%p request_bufflen = %d\n",
sc.request_buffer, sc.bh_next, sc.request_bufflen);
kdb_printf("use_sg = %d old_use_sg = %d sglist_len = %d abore_reason = %d\n",
sc.use_sg, sc.old_use_sg, sc.sglist_len, sc.abort_reason);
kdb_printf("bufflen = %d buffer = 0x%p underflow = %d transfersize = %d\n",
sc.bufflen, sc.buffer, sc.underflow, sc.transfersize);
kdb_printf("tag = %d pid = %ld\n",
sc.tag, sc.pid);
kdb_printf("request struct\n");
kdb_printf("rq_status = %s rq_dev = [%d/%d] errors = %d cmd = %d\n",
str_rq_status(sc.request.rq_status),
MAJOR(sc.request.rq_dev),
MINOR(sc.request.rq_dev), sc.request.cmd,
sc.request.errors);
kdb_printf("sector = %ld nr_sectors = %ld current_nr_sectors = %ld\n",
sc.request.sector, sc.request.nr_sectors, sc.request.current_nr_sectors);
kdb_printf("buffer = 0x%p bh = 0x%p bhtail = 0x%p\n",
sc.request.buffer, sc.request.bh, sc.request.bhtail);
return 0;
}
static int __init kdbm_vm_init(void)
{
kdb_register("vm", kdbm_vm, "<vaddr>", "Display vm_area_struct", 0);
kdb_register("dentry", kdbm_dentry, "<dentry>", "Display interesting dentry stuff", 0);
kdb_register("filp", kdbm_fp, "<filp>", "Display interesting filp stuff", 0);
kdb_register("sh", kdbm_sh, "<vaddr>", "Show scsi_host", 0);
kdb_register("sd", kdbm_sd, "<vaddr>", "Show scsi_device", 0);
kdb_register("sc", kdbm_sc, "<vaddr>", "Show scsi_cmnd", 0);
return 0;
}
static void __exit kdbm_vm_exit(void)
{
kdb_unregister("vm");
kdb_unregister("dentry");
kdb_unregister("filp");
kdb_unregister("sh");
kdb_unregister("sd");
kdb_unregister("sc");
}
module_init(kdbm_vm_init)
module_exit(kdbm_vm_exit)
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