I'm playing with some AoE (ATA over Ethernet) hardware and wanted to get it working with LVM1 (1.0.6 specifically, but this patch is for 1.0.8). I am trying to avoid upgrading the kernel on our production machine in the short term. Anyways, while the AoE driver is in the 2.6.11+ kernels it has to be added to 2.4 as an independent module (http://www.coraid.com/support/linux/). A couple of things to note about this: 1) The AoE module on the 2.4 kernel does not support partitioning, so I didn't bother to support it in this LVM patch. 2) AOE_MAJOR is not defined in include/linux/major.h on the 2.4 series kernel. It is defined in the 2.6 kernel as major=152, and it is also likewise defined in the AoE 2.4 module source (all.h), but of course when compiling LVM it isn't going to know where the AoE module source is located. I wasn't really certain how to handle this, so I just stuck it in kernel/lvm.h. I'm sure that's wrong. Probably it could be added into the PATCHES stuff, but I havn't sorted out how that all works. One could always add the #define to the kernel source I suppose, but I wanted my patch to just work :) 3) It looked like all I needed to do was tell LVM about the specifics of AoE block devices. It seems to be working, but I'll be the first to admit that I'm hacking here :) 4) Without this patch, simple LVM commands fail with an error like: # pvcreate /dev/etherd/e0.7 pvcreate -- invalid physical volume "/dev/etherd/e0.7" -poul ----- PATCH ----- diff -urN 1.0.8.orig/kernel/lvm.h 1.0.8/kernel/lvm.h --- 1.0.8.orig/kernel/lvm.h 2003-11-17 07:58:55.000000000 -0800 +++ 1.0.8/kernel/lvm.h 2005-10-05 20:11:47.000000000 -0700 @@ -153,6 +153,10 @@ #error Bad include/linux/major.h - LVM MAJOR undefined #endif +#if !defined AOE_MAJOR +#define AOE_MAJOR 152 +#endif + #ifdef BLOCK_SIZE #undef BLOCK_SIZE #endif diff -urN 1.0.8.orig/tools/lib/liblvm.h 1.0.8/tools/lib/liblvm.h --- 1.0.8.orig/tools/lib/liblvm.h 2003-02-28 06:51:35.000000000 -0800 +++ 1.0.8/tools/lib/liblvm.h 2005-10-05 20:13:49.000000000 -0700 @@ -191,6 +191,7 @@ LVM_DEVICE_TYPE_UBD, /* User-mode virtual block device */ LVM_DEVICE_TYPE_ATARAID, /* ATA Raid */ LVM_DEVICE_TYPE_I2O, /* i2o block device */ + LVM_DEVICE_TYPE_AOE, /* ATA over Ethernet */ } lvm_device_type_t; /* for lvm_show_size () */ diff -urN 1.0.8.orig/tools/lib/lvm_check_dev.c 1.0.8/tools/lib/lvm_check_dev.c --- 1.0.8.orig/tools/lib/lvm_check_dev.c 2003-02-06 07:05:33.000000000 -0800 +++ 1.0.8/tools/lib/lvm_check_dev.c 2005-10-05 20:07:10.000000000 -0700 @@ -64,6 +64,9 @@ #ifdef I2O_MAJOR I2O_MAJOR, #endif +#ifdef AOE_MAJOR + AOE_MAJOR, +#endif -1 }; diff -urN 1.0.8.orig/tools/lib/lvm_check_partitioned_dev.c 1.0.8/tools/lib/lvm_check_partitioned_dev.c --- 1.0.8.orig/tools/lib/lvm_check_partitioned_dev.c 2003-02-06 07:05:33.000000000 -0800 +++ 1.0.8/tools/lib/lvm_check_partitioned_dev.c 2005-10-05 20:08:31.000000000 -0700 @@ -64,6 +64,7 @@ case LVM_DEVICE_TYPE_LOOP: case LVM_DEVICE_TYPE_MD: case LVM_DEVICE_TYPE_ATARAID: + case LVM_DEVICE_TYPE_AOE: break; default: ret = TRUE; @@ -161,6 +162,7 @@ { "ubd", LVM_DEVICE_TYPE_UBD }, /* User-mode virtual block device */ { "ataraid", LVM_DEVICE_TYPE_ATARAID }, /* ATA Raid */ { "i2o_block", LVM_DEVICE_TYPE_I2O }, /* i2o disk */ + { "aoe", LVM_DEVICE_TYPE_AOE }, /* ATA over Ethernet */ { NULL, LVM_DEVICE_TYPE_INVALID } /* Device not recognized */ }; FILE *procdevices = NULL; diff -urN 1.0.8.orig/tools/lib/lvm_dir_cache.c 1.0.8/tools/lib/lvm_dir_cache.c --- 1.0.8.orig/tools/lib/lvm_dir_cache.c 2003-02-06 07:05:34.000000000 -0800 +++ 1.0.8/tools/lib/lvm_dir_cache.c 2005-10-05 20:09:36.000000000 -0700 @@ -69,6 +69,7 @@ static char *_noprocdir[] = { LVM_DIR_PREFIX "loop", LVM_DIR_PREFIX "nb", + LVM_DIR_PREFIX "etherd", NULL }; @@ -85,6 +86,7 @@ LVM_DIR_PREFIX "ubd", LVM_DIR_PREFIX "ataraid", LVM_DIR_PREFIX "i2o_block", + LVM_DIR_PREFIX "etherd", NULL }; _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
