Hi,

I am quite new to Linux and I am trying to make the usb.c file, but it comes up with a long list of errors (shown below). I have downloaded the kernel source and got the usb.c code from there - /home/user/ubuntu-jaunty/drivers/usb/storage.
I have a makefile, which seems to try and make the files but fails and I get a load of errors.

The makefile is:
obj-m := usb.o

KDIR := /lib/modules/$(shell uname -r)/build
PWD := $(shell pwd)

default:
$(MAKE) -C $(KDIR) M=$(PWD) modules


And the errors I am getting are:

/home/user/Documents/Tests/usb_tests/usb1/usb.c:975: error: invalid application of ‘sizeof’ to incomplete type ‘struct us_data’
/home/user/Documents/Tests/usb_tests/usb1/usb.c:975: error: invalid application of ‘sizeof’ to incomplete type ‘struct us_data’
/home/user/Documents/Tests/usb_tests/usb1/usb.c:975: error: invalid application of ‘sizeof’ to incomplete type ‘struct us_data’
/home/user/Documents/Tests/usb_tests/usb1/usb.c:976: error: dereferencing pointer to incomplete type
/home/user/Documents/Tests/usb_tests/usb1/usb.c:977: error: dereferencing pointer to incomplete type
/home/user/Documents/Tests/usb_tests/usb1/usb.c:978: error: dereferencing pointer to incomplete type
/home/user/Documents/Tests/usb_tests/usb1/usb.c:979: error: dereferencing pointer to incomplete type
/home/user/Documents/Tests/usb_tests/usb1/usb.c:980: error: dereferencing pointer to incomplete type
/home/user/Documents/Tests/usb_tests/usb1/usb.c:983: warning: passing argument 1 of ‘associate_dev’ from incompatible pointer type
/home/user/Documents/Tests/usb_tests/usb1/usb.c:983: warning: passing argument 2 of ‘associate_dev’ from incompatible pointer type
/home/user/Documents/Tests/usb_tests/usb1/usb.c:994: warning: passing argument 1 of ‘get_device_info’ from incompatible pointer type
/home/user/Documents/Tests/usb_tests/usb1/usb.c:999: warning: passing argument 1 of ‘get_transport’ from incompatible pointer type
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1002: warning: passing argument 1 of ‘get_protocol’ from incompatible pointer type
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1005: warning: passing argument 1 of ‘get_pipes’ from incompatible pointer type
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1010: warning: passing argument 1 of ‘usb_stor_acquire_resources’ from incompatible pointer type
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1013: error: implicit declaration of function ‘scsi_add_host’
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1013: error: dereferencing pointer to incomplete type
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1015: error: expected ‘)’ before ‘USB_STORAGE’
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1023: error: expected ‘)’ before ‘USB_STORAGE’
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1025: error: dereferencing pointer to incomplete type
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1026: warning: passing argument 1 of ‘quiesce_and_remove_host’ from incompatible pointer type
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1038: warning: passing argument 1 of ‘release_everything’ from incompatible pointer type
/home/user/Documents/Tests/usb_tests/usb1/usb.c: At top level:
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1043: warning: ‘struct usb_interface’ declared inside parameter list
/home/user/Documents/Tests/usb_tests/usb1/usb.c: In function ‘storage_disconnect’:
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1045: warning: initialisation makes pointer from integer without a cast
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1048: warning: passing argument 1 of ‘quiesce_and_remove_host’ from incompatible pointer type
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1049: warning: passing argument 1 of ‘release_everything’ from incompatible pointer type
/home/user/Documents/Tests/usb_tests/usb1/usb.c: At top level:
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1056: error: variable ‘usb_storage_driver’ has initialiser but incomplete type
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1057: error: unknown field ‘name’ specified in initialiser
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1057: warning: excess elements in struct initialiser
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1057: warning: (near initialisation for ‘usb_storage_driver’)
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1058: error: unknown field ‘probe’ specified in initialiser
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1058: warning: excess elements in struct initialiser
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1058: warning: (near initialisation for ‘usb_storage_driver’)
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1059: error: unknown field ‘disconnect’ specified in initialiser
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1059: warning: excess elements in struct initialiser
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1059: warning: (near initialisation for ‘usb_storage_driver’)
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1061: error: unknown field ‘suspend’ specified in initialiser
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1061: warning: excess elements in struct initialiser
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1061: warning: (near initialisation for ‘usb_storage_driver’)
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1062: error: unknown field ‘resume’ specified in initialiser
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1062: warning: excess elements in struct initialiser
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1062: warning: (near initialisation for ‘usb_storage_driver’)
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1063: error: unknown field ‘reset_resume’ specified in initialiser
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1063: warning: excess elements in struct initialiser
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1063: warning: (near initialisation for ‘usb_storage_driver’)
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1065: error: unknown field ‘pre_reset’ specified in initialiser
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1065: warning: excess elements in struct initialiser
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1065: warning: (near initialisation for ‘usb_storage_driver’)
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1066: error: unknown field ‘post_reset’ specified in initialiser
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1066: warning: excess elements in struct initialiser
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1066: warning: (near initialisation for ‘usb_storage_driver’)
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1067: error: unknown field ‘id_table’ specified in initialiser
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1067: warning: excess elements in struct initialiser
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1067: warning: (near initialisation for ‘usb_storage_driver’)
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1068: error: unknown field ‘soft_unbind’ specified in initialiser
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1068: warning: excess elements in struct initialiser
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1068: warning: (near initialisation for ‘usb_storage_driver’)
/home/user/Documents/Tests/usb_tests/usb1/usb.c: In function ‘usb_stor_init’:
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1077: error: implicit declaration of function ‘usb_register’
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1080: error: implicit declaration of function ‘usb_usual_set_present’
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1080: error: ‘USB_US_TYPE_STOR’ undeclared (first use in this function)
/home/user/Documents/Tests/usb_tests/usb1/usb.c: In function ‘usb_stor_exit’:
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1094: error: implicit declaration of function ‘usb_deregister’
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1096: error: implicit declaration of function ‘usb_usual_clear_present’
/home/user/Documents/Tests/usb_tests/usb1/usb.c:1096: error: ‘USB_US_TYPE_STOR’ undeclared (first use in this function)
make[2]: *** [/home/user/Documents/Tests/usb_tests/usb1/usb.o] Error 1
make[1]: *** [_module_/home/user/Documents/Tests/usb_tests/usb1] Error 2
make[1]: Leaving directory `/usr/src/linux-headers-2.6.28-17-generic'
make: *** [default] Error 2



I am not sure what is causing these errors, but any help will be appreciated.

I am using:
Linux version 2.6.28-17-generic (buildd@rothera) (gcc version 4.3.3 (Ubuntu 4.3.3-5ubuntu4) ) #58-Ubuntu SMP

Thanks!

are you building the usb.c in the kernel tree?

No, I am creating it within a folder called 'usb1' in my home directory.
I copied the usb.c from the kernel tree, as I want to make sure I have original copy... just in case.

Would this be an issue?

Because I have made the usb-skeleton.c in this directory and that works with the same makefile.

that's the reason

OK, so I have tried it from within the kernel tree and it makes the files.
But when I try and insert it into the kernel, with: sudo insmod ./usb.ko

I get:
insmod: error inserting './usb.ko': -1 Unknown symbol in module

I have not changed the usb.c file in any way, so I am not sure why there is an error???

try using depmod before insert

if persist, i'll check something here

Do you mean typing:
sudo depmod insmod ./usb.ko

Because after I do that I get:
FATAL: modules must be specified using absolute paths.
"insmod" is a relative path

Also after typing dmesg | tail, I get:
[ 3094.371873] usb: Unknown symbol usb_stor_freecom_reset
[ 3094.372017] usb: Unknown symbol freecom_init
[ 3094.372157] usb: Unknown symbol usb_stor_euscsi_init
[ 3094.372294] usb: Unknown symbol usb_stor_Bulk_transport
[ 3094.372437] usb: Unknown symbol init_usbat_flash
[ 3094.372666] usb: Unknown symbol usb_stor_ufi_command
[ 3094.372798] usb: Unknown symbol usb_stor_sddr09_init
[ 3094.372938] usb: Unknown symbol usb_stor_set_xfer_buf
[ 3094.373071] usb: Unknown symbol usb_stor_ucr61s2b_init
[ 3094.373203] usb: Unknown symbol usb_stor_sddr09_dpcm_init

I think these may be the symbols it is referring to, but I am not sure.

depmod $MODULE
insmod $MODULE

depmod makes the dependencies for modules
modprobe actually combines depmod, insmode and others. check its man page.

I am sorry if I am a pain, but do you mean typing:
depmod $MODULE
insmod $MODULE

or

depmod $usb.ko
insmod $usb.ko

Because the top one works, but does not load the module when I look at the loaded modules (using lsmod).
The bottom command does not work as it says:
FATAL: modules must be specified using absolute paths.
".ko" is a relative path

Am I typing in the correct commands?

you're not being a pain, just not get used to "nix" posting (even thou it's used a lot of places over the years now. even in windows with basic style).

what i meant by $MODULE was that you but module name here .

and secondly how's your usb support in the kernel. is it compiled in, or is it module only?

So when you say "what i meant by $MODULE was that you but module name here ." - Do you mean $usb.c?

Its a module I just want to load into the kernel. When I get it loaded I want it to print a message like "HELLO" (for example), but I will only add this once I get it loaded.

usb.c is your source code. you should load your compiled module

When I type:
sudo depmod $usb.c

I get:
FATAL: modules must be specified using absolute paths.
".c" is a relative path

So I then tried putting in the full path (/home/user/ubuntu-jaunty/drivers/usb/storage/usb.c) and it still comes up with the same error, saying that it is a relative path - even though it isn't.

depmod /home/user/ubuntu-jaunty/drivers/usb/storage/usb.ko