This patch (v0.4.3) adds /sysfs/firmware/ibft/[initiator|targetX|ethernetX| extensionX] directories along with text properties which export the the iSCSI Boot Firmware Table (iBFT) structure.
What is iSCSI Boot Firmware Table? It is a mechanism for the iSCSI tools to extract from the machine NICs the iSCSI connection information so that they can automagically mount the iSCSI share/target. Currently the iSCSI information is hard-coded in the initrd. For full details of the IBFT structure please take a look at: ftp://ftp.software.ibm.com/systems/support/system_x_pdf/ibm_iscsi_boot_firmware_table_v1.02.pdf Please note that this patch depends on the Greg KH patches tree kobject changes. Signed-off-by: Konrad Rzeszutek <[EMAIL PROTECTED]> diff --git a/Documentation/ABI/testing/sysfs-ibft b/Documentation/ABI/testing/sysfs-ibft new file mode 100644 index 0000000..4898740 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-ibft @@ -0,0 +1,31 @@ +What: /sys/firmware/ibft/initiator +Date: November 2007 +Contact: Konrad Rzeszutek <[EMAIL PROTECTED]> +Description: The /sys/firmware/ibft/initiator directory will contain + files that expose the iSCSI Boot Firmware Table initiator data. + Usually this contains the Initiator name. + +What: /sys/firmware/ibft/targetX +Date: November 2007 +Contact: Konrad Rzeszutek <[EMAIL PROTECTED]> +Description: The /sys/firmware/ibft/targetX directory will contain + files that expose the iSCSI Boot Firmware Table target data. + Usually this contains the target's IP address, boot LUN, + target name, and what NIC it is associated with. It can also + contain the CHAP name (and password), the reverse CHAP + name (and password) + +What: /sys/firmware/ibft/ethernetX +Date: November 2007 +Contact: Konrad Rzeszutek <[EMAIL PROTECTED]> +Description: The /sys/firmware/ibft/ethernetX directory will contain + files that expose the iSCSI Boot Firmware Table NIC data. + This can this can the IP address, MAC, and gateway of the NIC. + +What: /sys/firmware/ibft/extensionX +Date: November 2007 +Contact: Konrad Rzeszutek <[EMAIL PROTECTED]> +Description: The /sys/firmware/ibft/extensionX directory will contain + files that expose the iSCSI Boot Firmware Table extension data. + The extended data structure is not supported so there would be + no files in this directory. diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c index e1e18c3..32900df 100644 --- a/arch/x86/kernel/setup_32.c +++ b/arch/x86/kernel/setup_32.c @@ -39,6 +39,7 @@ #include <linux/module.h> #include <linux/efi.h> #include <linux/init.h> #include <linux/edd.h> +#include <linux/iscsi_ibft.h> #include <linux/nodemask.h> #include <linux/kexec.h> #include <linux/crash_dump.h> @@ -148,6 +149,20 @@ static inline void copy_edd(void) } #endif +#if defined(CONFIG_ISCSI_IBFT_FIND) +static void __init reserve_ibft_region(void) +{ + unsigned int ibft_len; + + ibft_len = find_ibft(); + if (ibft_len) + reserve_bootmem((unsigned int)ibft_phys, + PAGE_ALIGN(ibft_len)); +} +#else +static void __init reserve_ibft_region(void) { } +#endif + int __initdata user_defined_memmap = 0; /* @@ -496,6 +511,8 @@ #ifdef CONFIG_BLK_DEV_INITRD } #endif reserve_crashkernel(); + + reserve_ibft_region(); } /* diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c index 30d94d1..307fb99 100644 --- a/arch/x86/kernel/setup_64.c +++ b/arch/x86/kernel/setup_64.c @@ -33,6 +33,7 @@ #include <linux/pci.h> #include <linux/acpi.h> #include <linux/kallsyms.h> #include <linux/edd.h> +#include <linux/iscsi_ibft.h> #include <linux/mmzone.h> #include <linux/kexec.h> #include <linux/cpufreq.h> @@ -198,6 +199,20 @@ static inline void copy_edd(void) } #endif +#if defined(CONFIG_ISCSI_IBFT_FIND) +static void __init reserve_ibft_region(void) +{ + unsigned int ibft_len; + + ibft_len = find_ibft(); + if (ibft_len) + reserve_bootmem_generic((unsigned long)ibft_phys, + PAGE_ALIGN(ibft_len)); +} +#else +static void __init reserve_ibft_region(void) { } +#endif + #ifdef CONFIG_KEXEC static void __init reserve_crashkernel(void) { @@ -403,6 +418,9 @@ #ifdef CONFIG_BLK_DEV_INITRD } #endif reserve_crashkernel(); + + reserve_ibft_region(); + paging_init(); #ifdef CONFIG_PCI diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig index 05f02a3..e2f7208 100644 --- a/drivers/firmware/Kconfig +++ b/drivers/firmware/Kconfig @@ -93,4 +93,23 @@ config DMIID information from userspace through /sys/class/dmi/id/ or if you want DMI-based module auto-loading. +config ISCSI_IBFT_FIND + bool "iSCSI Boot Firmware Table Attributes" + default n + help + This option enables the kernel to find the region of memory + in which the ISCSI Boot Firmware Table (iBFT) resides. This + is necessary for iSCSI Boot Firmware Table Attributes module to work + properly. + +config ISCSI_IBFT + tristate "iSCSI Boot Firmware Table Attributes module" + depends on ISCSI_IBFT_FIND + default n + help + This option enables support for detection and exposing of iSCSI + Boot Firmware Table (iBFT) via sysfs to userspace. If you wish to + detect iSCSI boot parameters dynamically during system boot, say Y. + Otherwise, say N. + endmenu diff --git a/drivers/firmware/Makefile b/drivers/firmware/Makefile index 8d4ebc8..4c91471 100644 --- a/drivers/firmware/Makefile +++ b/drivers/firmware/Makefile @@ -8,3 +8,5 @@ obj-$(CONFIG_EFI_PCDP) += pcdp.o obj-$(CONFIG_DELL_RBU) += dell_rbu.o obj-$(CONFIG_DCDBAS) += dcdbas.o obj-$(CONFIG_DMIID) += dmi-id.o +obj-$(CONFIG_ISCSI_IBFT_FIND) += iscsi_ibft_find.o +obj-$(CONFIG_ISCSI_IBFT) += iscsi_ibft.o diff --git a/drivers/firmware/iscsi_ibft.c b/drivers/firmware/iscsi_ibft.c new file mode 100644 index 0000000..90cb9de --- /dev/null +++ b/drivers/firmware/iscsi_ibft.c @@ -0,0 +1,927 @@ +/* + * Copyright 2007 Red Hat, Inc. + * by Peter Jones <[EMAIL PROTECTED]> + * Copyright 2007 IBM, Inc. + * by Konrad Rzeszutek <[EMAIL PROTECTED]> + * + * This code exposes the iSCSI Boot Format Table to userland via sysfs. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License v2.0 as published by + * the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * Changelog: + * + * 21 Dec 2007 - Konrad Rzeszutek <[EMAIL PROTECTED]> + * Updated kobject registration, combined unregister functions in one + * and code and style cleanup. (v0.4.3) + * + * 5 Dec 2007 - Konrad Rzeszutek <[EMAIL PROTECTED]> + * Added end-markers to enums and re-organized kobject registration. (v0.4.2) + * + * 4 Dec 2007 - Konrad Rzeszutek <[EMAIL PROTECTED]> + * Created 'device' sysfs link to the NIC and style cleanup. (v0.4.1) + * + * 28 Nov 2007 - Konrad Rzeszutek <[EMAIL PROTECTED]> + * Added sysfs-ibft documentation, moved 'find_ibft' function to + * in its own file and added text attributes for every struct field. (v0.4) + * + * 21 Nov 2007 - Konrad Rzeszutek <[EMAIL PROTECTED]> + * Added text attributes emulating OpenFirmware /proc/device-tree naming. + * Removed binary /sysfs interface (v0.3) + * + * 29 Aug 2007 - Konrad Rzeszutek <[EMAIL PROTECTED]> + * Added functionality in setup.c to reserve iBFT region. (v0.2) + * + * 27 Aug 2007 - Konrad Rzeszutek <[EMAIL PROTECTED]> + * First version exposing iBFT data via a binary /sysfs. (v0.1) + * + */ + + +#include <linux/blkdev.h> +#include <linux/ctype.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/init.h> +#include <linux/iscsi_ibft.h> +#include <linux/limits.h> +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/slab.h> +#include <linux/stat.h> +#include <linux/string.h> +#include <linux/types.h> + +#define IBFT_ISCSI_VERSION "0.4.3" +#define IBFT_ISCSI_DATE "2007-Dec-21" + +MODULE_AUTHOR("Peter Jones <[EMAIL PROTECTED]> and \ +Konrad Rzeszutek <[EMAIL PROTECTED]>"); +MODULE_DESCRIPTION("sysfs interface to BIOS iBFT information"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(IBFT_ISCSI_VERSION); + + +struct ibft_table_header { + char signature[4]; + u32 length; + u8 revision; + u8 checksum; + char oem_id[6]; + char oem_table_id[8]; + char reserved[24]; +} __attribute__((__packed__)); + +struct ibft_hdr { + u8 id; + u8 version; + u16 length; + u8 index; + u8 flags; +} __attribute__((__packed__)); + +struct ibft_control { + struct ibft_hdr hdr; + u16 extensions; + u16 initiator_off; + u16 nic0_off; + u16 tgt0_off; + u16 nic1_off; + u16 tgt1_off; +} __attribute__((__packed__)); + +struct ibft_initiator { + struct ibft_hdr hdr; + char isns_server[16]; + char slp_server[16]; + char pri_radius_server[16]; + char sec_radius_server[16]; + u16 initiator_name_len; + u16 initiator_name_off; +} __attribute__((__packed__)); + +struct ibft_nic { + struct ibft_hdr hdr; + char ip_addr[16]; + u8 subnet_mask_prefix; + u8 origin; + char gateway[16]; + char primary_dns[16]; + char secondary_dns[16]; + char dhcp[16]; + u16 vlan; + char mac[6]; + u16 pci_bdf; + u16 hostname_len; + u16 hostname_off; +} __attribute__((__packed__)); + +struct ibft_tgt { + struct ibft_hdr hdr; + char ip_addr[16]; + u16 port; + char lun[8]; + u8 chap_type; + u8 nic_assoc; + u16 tgt_name_len; + u16 tgt_name_off; + u16 chap_name_len; + u16 chap_name_off; + u16 chap_secret_len; + u16 chap_secret_off; + u16 rev_chap_name_len; + u16 rev_chap_name_off; + u16 rev_chap_secret_len; + u16 rev_chap_secret_off; +} __attribute__((__packed__)); + +/* + * The kobject different types and its names. + * +*/ +enum ibft_id { + id_reserved = 0, /* Should never show up */ + id_control = 1, /* Ditto */ + id_initiator = 2, + id_nic = 3, + id_target = 4, + id_extensions, /* We don't support. */ +}; + +static const char *ibft_id_names[] = + {"reserved", "control", "initiator", "ethernet%d", + "target%d", "extension%d", NULL}; + +/* + * The text attributes names for each of the kobjects. +*/ +enum ibft_eth_properties_enum { + ibft_eth_index, + ibft_eth_flags, + ibft_eth_ip_addr, + ibft_eth_subnet_mask, + ibft_eth_origin, + ibft_eth_gateway, + ibft_eth_primary_dns, + ibft_eth_secondary_dns, + ibft_eth_dhcp, + ibft_eth_vlan, + ibft_eth_mac, + /* ibft_eth_pci_bdf - this is replaced by link to the device itself. */ + ibft_eth_hostname, + ibft_eth_end_marker, +}; + +static const char *ibft_eth_properties[] = + {"index", "flags", "ip-addr", "subnet-mask", "origin", "gateway", + "primary-dns", "secondary-dns", "dhcp", "vlan", "mac", "hostname", + NULL}; + +enum ibft_tgt_properties_enum { + ibft_tgt_index, + ibft_tgt_flags, + ibft_tgt_ip_addr, + ibft_tgt_port, + ibft_tgt_lun, + ibft_tgt_chap_type, + ibft_tgt_nic_assoc, + ibft_tgt_name, + ibft_tgt_chap_name, + ibft_tgt_chap_secret, + ibft_tgt_rev_chap_name, + ibft_tgt_rev_chap_secret, + ibft_tgt_end_marker, +}; + +static const char *ibft_tgt_properties[] = + {"index", "flags", "ip-addr", "port", "lun", "chap-type", "nic-assoc", + "target-name", "chap-name", "chap-secret", "rev-chap-name", + "rev-chap-name-secret", NULL}; + +enum ibft_initiator_properties_enum { + ibft_init_index, + ibft_init_flags, + ibft_init_isns_server, + ibft_init_slp_server, + ibft_init_pri_radius_server, + ibft_init_sec_radius_server, + ibft_init_initiator_name, + ibft_init_end_marker, +}; + +static const char *ibft_initiator_properties[] = + {"index", "flags", "isns-server", "slp-server", "pri-radius-server", + "sec-radius-server", "initiator-name", NULL}; + +/* + * The kobject and attribute structures. + */ + +struct ibft_kobject { + struct ibft_table_header *header; + union { + struct ibft_initiator *initiator; + struct ibft_nic *nic; + struct ibft_tgt *tgt; + struct ibft_hdr *hdr; + }; + struct kobject kobj; + struct list_head node; +}; + +struct ibft_attribute { + struct attribute attr; + ssize_t (*show) (struct ibft_kobject *entry, + struct ibft_attribute *attr, char *buf); + union { + struct ibft_initiator *initiator; + struct ibft_nic *nic; + struct ibft_tgt *tgt; + struct ibft_hdr *hdr; + }; + struct kobject *kobj; + int type; /* The enum of the type. This can be any value off: + ibft_eth_properties_enum, ibft_tgt_properties_enum, + or ibft_initiator_properties_enum. */ + struct list_head node; +}; + +static LIST_HEAD(ibft_attr_list); +static LIST_HEAD(ibft_kobject_list); + +static const char nulls[16]; +static struct ibft_table_header *ibft_device; + +/* + * Helper functions to parse data properly. + */ +static ssize_t sprintf_ipaddr(char *buf, u8 *ip) +{ + if (ip[0] == 0 && ip[1] == 0 && ip[2] == 0 && ip[3] == 0 && + ip[4] == 0 && ip[5] == 0 && ip[6] == 0 && ip[7] == 0 && + ip[8] == 0 && ip[9] == 0 && ip[10] == 0xff && ip[11] == 0xff) { + /* + * IPV4 + */ + return sprintf(buf, "%d.%d.%d.%d\n", ip[12], + ip[13], ip[14], ip[15]); + } else + return 0; +} + +static ssize_t sprintf_string(char *str, int len, char *buf) +{ + return sprintf(str, "%.*s\n", len, buf); +} + +/* + * Helper function to verify the IBFT header. + */ +static int ibft_verify_hdr(struct ibft_hdr *hdr, int id, int length) +{ +#define IBFT_VERIFY_HDR_FIELD(val, name) \ + if (hdr->val != val) { \ + printk(KERN_ERR \ + "error, in IBFT structure (%s) expected %d but" \ + " found %d\n", \ + name, val, hdr->val); \ + return -ENODEV; \ + } + IBFT_VERIFY_HDR_FIELD(id, "ID"); + IBFT_VERIFY_HDR_FIELD(length, "Length"); + return 0; +} + +static void ibft_release(struct kobject *kobj) +{ + struct ibft_kobject *ibft = + container_of(kobj, struct ibft_kobject, kobj); + kfree(ibft); +} + +/* + * Routines for reading of the iBFT data in a human readable fashion. + */ +ssize_t ibft_attr_show_initiator(struct ibft_kobject *entry, + struct ibft_attribute *attr, + char *buf) +{ + struct ibft_initiator *initiator = entry->initiator; + void *ibft_loc = entry->header; + char *str = buf; + + if (!initiator) + return 0; + + switch (attr->type) { + case ibft_init_index: + str += sprintf(str, "%d\n", initiator->hdr.index); + break; + case ibft_init_flags: + str += sprintf(str, "%d\n", initiator->hdr.flags); + break; + case ibft_init_isns_server: + str += sprintf_ipaddr(str, initiator->isns_server); + break; + case ibft_init_slp_server: + str += sprintf_ipaddr(str, initiator->slp_server); + break; + case ibft_init_pri_radius_server: + str += sprintf_ipaddr(str, initiator->pri_radius_server); + break; + case ibft_init_sec_radius_server: + str += sprintf_ipaddr(str, initiator->sec_radius_server); + break; + case ibft_init_initiator_name: + str += sprintf_string(str, initiator->initiator_name_len, + (char *)ibft_loc + + initiator->initiator_name_off); + break; + default: + break; + } + + return str - buf; +} + +ssize_t ibft_attr_show_nic(struct ibft_kobject *entry, + struct ibft_attribute *attr, + char *buf) +{ + struct ibft_nic *nic = entry->nic; + void *ibft_loc = entry->header; + char *str = buf; + char *mac; + int val; + + if (!nic) + return 0; + + switch (attr->type) { + case ibft_eth_index: + str += sprintf(str, "%d\n", nic->hdr.index); + break; + case ibft_eth_flags: + str += sprintf(str, "%d\n", nic->hdr.flags); + break; + case ibft_eth_ip_addr: + str += sprintf_ipaddr(str, nic->ip_addr); + break; + case ibft_eth_subnet_mask: + val = ~((1 << (32-nic->subnet_mask_prefix))-1); + str += sprintf(str, "%d.%d.%d.%d\n", + (u8)(val >> 24), (u8)(val >> 16), + (u8)(val >> 8), (u8)(val)); + break; + case ibft_eth_origin: + str += sprintf(str, "%d\n", nic->origin); + break; + case ibft_eth_gateway: + str += sprintf_ipaddr(str, nic->gateway); + break; + case ibft_eth_primary_dns: + str += sprintf_ipaddr(str, nic->primary_dns); + break; + case ibft_eth_secondary_dns: + str += sprintf_ipaddr(str, nic->secondary_dns); + break; + case ibft_eth_dhcp: + str += sprintf_ipaddr(str, nic->dhcp); + break; + case ibft_eth_vlan: + str += sprintf(str, "%d\n", nic->vlan); + break; + case ibft_eth_mac: + mac = nic->mac; + str += sprintf(str, "%02x:%02x:%02x:%02x:%02x:%02x\n", + (u8)mac[0], (u8)mac[1], (u8)mac[2], + (u8)mac[3], (u8)mac[4], (u8)mac[5]); + break; + case ibft_eth_hostname: + str += sprintf_string(str, nic->hostname_len, + (char *)ibft_loc + nic->hostname_off); + break; + default: + break; + } + + return str - buf; +}; + +ssize_t ibft_attr_show_target(struct ibft_kobject *entry, + struct ibft_attribute *attr, + char *buf) +{ + struct ibft_tgt *tgt = entry->tgt; + void *ibft_loc = entry->header; + char *str = buf; + int i; + + if (!tgt) + return 0; + + switch (attr->type) { + case ibft_tgt_index: + str += sprintf(str, "%d\n", tgt->hdr.index); + break; + case ibft_tgt_flags: + str += sprintf(str, "%d\n", tgt->hdr.flags); + break; + case ibft_tgt_ip_addr: + str += sprintf_ipaddr(str, tgt->ip_addr); + break; + case ibft_tgt_port: + str += sprintf(str, "%d\n", tgt->port); + break; + case ibft_tgt_lun: + for (i = 0; i < 8; i++) + str += sprintf(str, "%x", (u8)tgt->lun[i]); + str += sprintf(str, "\n"); + break; + case ibft_tgt_nic_assoc: + str += sprintf(str, "%d\n", tgt->nic_assoc); + break; + case ibft_tgt_chap_type: + str += sprintf(str, "%d\n", tgt->chap_type); + break; + case ibft_tgt_name: + str += sprintf_string(str, tgt->tgt_name_len, + (char *)ibft_loc + tgt->tgt_name_off); + break; + case ibft_tgt_chap_name: + str += sprintf_string(str, tgt->chap_name_len, + (char *)ibft_loc + tgt->chap_name_off); + break; + case ibft_tgt_chap_secret: + str += sprintf_string(str, tgt->chap_secret_len, + (char *)ibft_loc + tgt->chap_secret_off); + break; + case ibft_tgt_rev_chap_name: + str += sprintf_string(str, tgt->rev_chap_name_len, + (char *)ibft_loc + + tgt->rev_chap_name_off); + break; + case ibft_tgt_rev_chap_secret: + str += sprintf_string(str, tgt->rev_chap_secret_len, + (char *)ibft_loc + + tgt->rev_chap_secret_off); + break; + default: + break; + } + + return str - buf; +} + +/* + * The main routine which allows the user to read the IBFT data. + */ +static ssize_t ibft_show_attribute(struct kobject *kobj, + struct attribute *attr, + char *buf) +{ + struct ibft_kobject *dev = + container_of(kobj, struct ibft_kobject, kobj); + struct ibft_attribute *ibft_attr = + container_of(attr, struct ibft_attribute, attr); + ssize_t ret = -EIO; + char *str = buf; + + if (!capable(CAP_SYS_ADMIN)) + return -EACCES; + + if (ibft_attr->show) + ret = ibft_attr->show(dev, ibft_attr, str); + + return ret; +} + +static struct sysfs_ops ibft_attr_ops = { + .show = ibft_show_attribute, +}; + +static struct kobj_type ibft_ktype = { + .release = ibft_release, + .sysfs_ops = &ibft_attr_ops, +}; + +static struct kset *ibft_kset; + +static int ibft_alloc_device(void *idev) +{ + int len; + struct ibft_table_header *hdr; + + if (!idev) + return -ENOENT; + + hdr = (struct ibft_table_header *) + phys_to_virt((unsigned long)ibft_phys); + len = hdr->length; + + ibft_device = kmalloc(len, GFP_KERNEL); + if (!ibft_device) + return -ENOMEM; + + memcpy(ibft_device, hdr, len); + + return 0; +} + +static void ibft_free_device(struct ibft_table_header *hdr) +{ + kfree(hdr); +} + +/* + * Helper function for ibft_register_kobjects. + */ +static int ibft_create_kobject(struct ibft_table_header *header, + struct ibft_hdr *hdr, + struct list_head *list) +{ + struct ibft_kobject *ibft_kobj = NULL; + struct ibft_nic *nic = (struct ibft_nic *)hdr; + struct pci_dev *pci_dev; + int rc = 0; + + ibft_kobj = kzalloc(sizeof(*ibft_kobj), GFP_KERNEL); + if (!ibft_kobj) + return -ENOMEM; + + ibft_kobj->header = header; + ibft_kobj->hdr = hdr; + + switch (hdr->id) { + case id_initiator: + rc = ibft_verify_hdr(hdr, id_initiator, + sizeof(*ibft_kobj->initiator)); + break; + case id_nic: + rc = ibft_verify_hdr(hdr, id_nic, + sizeof(*ibft_kobj->nic)); + break; + case id_target: + rc = ibft_verify_hdr(hdr, id_target, + sizeof(*ibft_kobj->tgt)); + break; + default: + /* Extension field which we don't support. Ignore it */ + break; + } + + if (rc) { + kfree(ibft_kobj); + goto out; + } + + /* kobject fief. We will let the reference counter do the job + of deleting its name if we fail here. */ + ibft_kobj->kobj.kset = ibft_kset; + + rc = kobject_init_and_add(&ibft_kobj->kobj, &ibft_ktype, + NULL, ibft_id_names[hdr->id], hdr->index); + + if (rc) { + kfree(ibft_kobj); + goto out; + } + + kobject_uevent(&ibft_kobj->kobj, KOBJ_ADD); + + if (hdr->id == id_nic) { + pci_dev = pci_get_bus_and_slot((nic->pci_bdf & 0xff00) >> 8, + (nic->pci_bdf & 0xff)); + if (pci_dev) { + rc = sysfs_create_link(&ibft_kobj->kobj, + &pci_dev->dev.kobj, "device"); + pci_dev_put(pci_dev); + } + } + + /* Nothing broke so lets add it to the list. */ + list_add_tail(&ibft_kobj->node, list); +out: + return rc; +} + +/* + * Scan the IBFT table structure for the NIC and Target fields. When + * found add them on the passed-in list. + */ +static int ibft_register_kobjects(struct ibft_table_header *header, + struct list_head *list) +{ + struct ibft_control *control = NULL; + void *ptr, *end; + int rc = 0; + u16 offset; + + control = (void *)header + sizeof(*header); + end = (void *)control + control->hdr.length; + + for (ptr = &control->initiator_off; ptr < end; ptr += sizeof(u16)) { + offset = *(u16 *)ptr; + if (offset && offset < header->length) { + rc = ibft_create_kobject(header, + (void *)header + offset, + list); + if (rc) + break; + } + } + + return rc; +} + +static void ibft_unregister(struct list_head *attr_list, + struct list_head *kobj_list) +{ + struct ibft_kobject *data = NULL, *n; + struct ibft_attribute *attr = NULL, *m; + + list_for_each_entry_safe(attr, m, attr_list, node) { + sysfs_remove_file(attr->kobj, &attr->attr); + list_del(&attr->node); + kfree(attr); + }; + list_del_init(attr_list); + + list_for_each_entry_safe(data, n, kobj_list, node) { + list_del(&data->node); + if (data->hdr->id == id_nic) + sysfs_remove_link(&data->kobj, "device"); + kobject_unregister(&data->kobj); + }; + list_del_init(kobj_list); +} + +static int ibft_create_attribute(struct ibft_kobject *kobj_data, + int type, + const char *name, + ssize_t (*show) (struct ibft_kobject *entry, + struct ibft_attribute *attr, + char *buf), + struct list_head *list) +{ + struct ibft_attribute *attr = NULL; + struct ibft_hdr *hdr = kobj_data->hdr; + + attr = kmalloc(sizeof(*attr), GFP_KERNEL); + if (!attr) + return -ENOMEM; + + attr->attr.name = name; + attr->attr.mode = S_IRUSR; + attr->attr.owner = THIS_MODULE; + + attr->hdr = hdr; + attr->show = show; + attr->kobj = &kobj_data->kobj; + attr->type = type; + + list_add_tail(&attr->node, list); + + return 0; +} + +static int ibft_check_nic_for(struct ibft_nic *nic, int entry) +{ + int rc = 0; + + switch (entry) { + case ibft_eth_index: + case ibft_eth_flags: + rc = 1; + break; + case ibft_eth_ip_addr: + if (!memcmp(nic->dhcp, nulls, sizeof(nic->dhcp))) + rc = 1; + break; + case ibft_eth_subnet_mask: + if (!memcmp(nic->dhcp, nulls, sizeof(nic->dhcp))) + rc = 1; + break; + case ibft_eth_origin: + rc = 1; + break; + case ibft_eth_gateway: + if (memcmp(nic->gateway, nulls, sizeof(nic->gateway))) + rc = 1; + break; + case ibft_eth_primary_dns: + if (memcmp(nic->primary_dns, nulls, + sizeof(nic->primary_dns))) + rc = 1; + break; + case ibft_eth_secondary_dns: + if (memcmp(nic->secondary_dns, nulls, + sizeof(nic->secondary_dns))) + rc = 1; + break; + case ibft_eth_dhcp: + if (memcmp(nic->dhcp, nulls, sizeof(nic->dhcp))) + rc = 1; + break; + case ibft_eth_vlan: + case ibft_eth_mac: + rc = 1; + break; + case ibft_eth_hostname: + if (nic->hostname_off) + rc = 1; + break; + default: + break; + } + + return rc; +} + +static int ibft_check_tgt_for(struct ibft_tgt *tgt, int entry) +{ + int rc = 0; + + switch (entry) { + case ibft_tgt_index: + case ibft_tgt_flags: + case ibft_tgt_ip_addr: + case ibft_tgt_port: + case ibft_tgt_lun: + case ibft_tgt_nic_assoc: + case ibft_tgt_chap_type: + rc = 1; + case ibft_tgt_name: + if (tgt->tgt_name_len) + rc = 1; + break; + case ibft_tgt_chap_name: + case ibft_tgt_chap_secret: + if (tgt->chap_name_len) + rc = 1; + break; + case ibft_tgt_rev_chap_name: + case ibft_tgt_rev_chap_secret: + if (tgt->rev_chap_name_len) + rc = 1; + break; + default: + break; + } + + return rc; +} + +static int ibft_check_initiator_for(struct ibft_initiator *init, int entry) +{ + int rc = 0; + + switch (entry) { + case ibft_init_index: + case ibft_init_flags: + rc = 1; + break; + case ibft_init_isns_server: + if (memcmp(init->isns_server, nulls, + sizeof(init->isns_server))) + rc = 1; + break; + case ibft_init_slp_server: + if (memcmp(init->slp_server, nulls, + sizeof(init->slp_server))) + rc = 1; + break; + case ibft_init_pri_radius_server: + if (memcmp(init->pri_radius_server, nulls, + sizeof(init->pri_radius_server))) + rc = 1; + break; + case ibft_init_sec_radius_server: + if (memcmp(init->sec_radius_server, nulls, + sizeof(init->sec_radius_server))) + rc = 1; + break; + case ibft_init_initiator_name: + if (init->initiator_name_len) + rc = 1; + break; + default: + break; + } + + return rc; +} + +/* + * Register the attributes for all of the kobjects. + */ +static int ibft_register_attributes(struct list_head *kobject_list, + struct list_head *attr_list) +{ + int rc = 0, i = 0; + struct ibft_kobject *data = NULL; + struct ibft_attribute *attr = NULL, *m; + + list_for_each_entry(data, kobject_list, node) { + switch (data->hdr->id) { + case id_nic: + for (i = 0; i < ibft_eth_end_marker && !rc; i++) + if (ibft_check_nic_for(data->nic, i)) + rc = ibft_create_attribute(data, i, + ibft_eth_properties[i], + ibft_attr_show_nic, attr_list); + break; + case id_target: + for (i = 0; i < ibft_tgt_end_marker && !rc; i++) + if (ibft_check_tgt_for(data->tgt, i)) + rc = ibft_create_attribute(data, i, + ibft_tgt_properties[i], + ibft_attr_show_target, + attr_list); + break; + case id_initiator: + for (i = 0; i < ibft_init_end_marker && !rc; i++) + if (ibft_check_initiator_for( + data->initiator, i)) + rc = ibft_create_attribute(data, i, + ibft_initiator_properties[i], + ibft_attr_show_initiator, + attr_list); + break; + default: + break; + } + if (rc) + break; + } + list_for_each_entry_safe(attr, m, attr_list, node) { + rc = sysfs_create_file(attr->kobj, &attr->attr); + if (rc) { + list_del(&attr->node); + kfree(attr); + break; + } + } + + return rc; +} + +/* + * ibft_init() - creates sysfs tree entries for iBFT data. + */ +static int __init ibft_init(void) +{ + int rc = 0; + + if (!ibft_phys) + find_ibft(); + + ibft_kset = kset_create_and_add("ibft", NULL, firmware_kobj); + if (!ibft_kset) + return -ENOMEM; + + if (ibft_phys) { + printk(KERN_INFO "iBFT detected at 0x%p.\n", ibft_phys); + + rc = ibft_alloc_device(ibft_phys); + if (rc) + goto out_firmware_unregister; + + /* Scan the IBFT for data and register kobjects. */ + rc = ibft_register_kobjects(ibft_device, &ibft_kobject_list); + if (rc) + goto out_free; + + /* Register the attributes */ + rc = ibft_register_attributes(&ibft_kobject_list, + &ibft_attr_list); + if (rc) + goto out_free; + } else + printk(KERN_INFO "No iBFT detected.\n"); + + return 0; + +out_free: + ibft_unregister(&ibft_attr_list, &ibft_kobject_list); + ibft_free_device(ibft_device); +out_firmware_unregister: + kset_unregister(ibft_kset); + return rc; +} + +static void __exit ibft_exit(void) +{ + ibft_unregister(&ibft_attr_list, &ibft_kobject_list); + ibft_free_device(ibft_device); + kset_unregister(ibft_kset); +} + +module_init(ibft_init); +module_exit(ibft_exit); diff --git a/drivers/firmware/iscsi_ibft_find.c b/drivers/firmware/iscsi_ibft_find.c new file mode 100644 index 0000000..d40cc25 --- /dev/null +++ b/drivers/firmware/iscsi_ibft_find.c @@ -0,0 +1,77 @@ +/* + * Copyright 2007 Red Hat, Inc. + * by Peter Jones <[EMAIL PROTECTED]> + * Copyright 2007 IBM, Inc. + * by Konrad Rzeszutek <[EMAIL PROTECTED]> + * + * This code finds the iSCSI Boot Format Table. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License v2.0 as published by + * the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/blkdev.h> +#include <linux/ctype.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/init.h> +#include <linux/limits.h> +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/slab.h> +#include <linux/stat.h> +#include <linux/string.h> +#include <linux/types.h> + + +/* + * Physical location of iSCSI Boot Format Table. + */ +void *ibft_phys; +EXPORT_SYMBOL(ibft_phys); + +#define IBFT_SIGN "iBFT" +#define IBFT_SIGN_LEN 4 +#define IBFT_START 0x80000 /* 512kB */ +#define IBFT_END 0x100000 /* 1MB */ +#define VGA_MEM 0xA0000 /* VGA buffer */ +#define VGA_SIZE 0x20000 /* 128kB */ + + +/* + * Routine used to find the iSCSI Boot Format Table. the physical + * location is set in the ibft_phys variable. The return value is + * the size of IBFT. + */ +ssize_t find_ibft(void) +{ + unsigned long pos; + + for (pos = IBFT_START; pos < IBFT_END; pos += 16) { + void *virt; + /* The table can't be inside the VGA BIOS reserved space, + * so skip that area */ + if (pos == VGA_MEM) + pos += VGA_SIZE; + virt = phys_to_virt(pos); + if (memcmp(virt, IBFT_SIGN, IBFT_SIGN_LEN) == 0) { + unsigned long *addr = + (unsigned long *)phys_to_virt(pos + 4); + unsigned int len = *addr; + /* if the length of the table extends past 1M, + * the table cannot be valid. */ + if (pos + len <= (IBFT_END-1)) { + ibft_phys = (void *)pos; + return len; + } + } + } + return 0; +} +EXPORT_SYMBOL(find_ibft); diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c diff --git a/include/linux/iscsi_ibft.h b/include/linux/iscsi_ibft.h new file mode 100644 index 0000000..d36ca16 --- /dev/null +++ b/include/linux/iscsi_ibft.h @@ -0,0 +1,38 @@ +/* + * Copyright 2007 Red Hat, Inc. + * by Peter Jones <[EMAIL PROTECTED]> + * Copyright 2007 IBM, Inc. + * by Konrad Rzeszutek <[EMAIL PROTECTED]> + * + * This code exposes the iSCSI Boot Format Table to userland via sysfs. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License v2.0 as published by + * the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef ISCSI_IBFT_H +#define ISCSI_IBFT_H + +#if defined(CONFIG_ISCSI_IBFT_FIND) + +/* + * Physical location of iSCSI Boot Format Table. + */ +extern void *ibft_phys; + +/* + * Routine used to find the iSCSI Boot Format Table. The physical + * location is set in the ibft_phys variable. The return value is the + * size of IBFT. + */ +extern ssize_t find_ibft(void); + +#endif + +#endif /* ISCSI_IBFT_H */ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
