| /* |
| * This file is part of the zfcp device driver for |
| * FCP adapters for IBM System z9 and zSeries. |
| * |
| * (C) Copyright IBM Corp. 2002, 2006 |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2, or (at your option) |
| * any later version. |
| * |
| * 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. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| /* |
| * Driver authors: |
| * Martin Peschke (originator of the driver) |
| * Raimund Schroeder |
| * Aron Zeh |
| * Wolfgang Taphorn |
| * Stefan Bader |
| * Heiko Carstens (kernel 2.6 port of the driver) |
| * Andreas Herrmann |
| * Maxim Shchetynin |
| * Volker Sameske |
| * Ralph Wuerthner |
| */ |
| |
| #include "zfcp_ext.h" |
| |
| /* accumulated log level (module parameter) */ |
| static u32 loglevel = ZFCP_LOG_LEVEL_DEFAULTS; |
| static char *device; |
| /*********************** FUNCTION PROTOTYPES *********************************/ |
| |
| /* written against the module interface */ |
| static int __init zfcp_module_init(void); |
| |
| /* FCP related */ |
| static void zfcp_ns_gid_pn_handler(unsigned long); |
| |
| /* miscellaneous */ |
| static inline int zfcp_sg_list_alloc(struct zfcp_sg_list *, size_t); |
| static inline void zfcp_sg_list_free(struct zfcp_sg_list *); |
| static inline int zfcp_sg_list_copy_from_user(struct zfcp_sg_list *, |
| void __user *, size_t); |
| static inline int zfcp_sg_list_copy_to_user(void __user *, |
| struct zfcp_sg_list *, size_t); |
| |
| static long zfcp_cfdc_dev_ioctl(struct file *, unsigned int, unsigned long); |
| |
| #define ZFCP_CFDC_IOC_MAGIC 0xDD |
| #define ZFCP_CFDC_IOC \ |
| _IOWR(ZFCP_CFDC_IOC_MAGIC, 0, struct zfcp_cfdc_sense_data) |
| |
| |
| static struct file_operations zfcp_cfdc_fops = { |
| .unlocked_ioctl = zfcp_cfdc_dev_ioctl, |
| #ifdef CONFIG_COMPAT |
| .compat_ioctl = zfcp_cfdc_dev_ioctl |
| #endif |
| }; |
| |
| static struct miscdevice zfcp_cfdc_misc = { |
| .minor = ZFCP_CFDC_DEV_MINOR, |
| .name = ZFCP_CFDC_DEV_NAME, |
| .fops = &zfcp_cfdc_fops |
| }; |
| |
| /*********************** KERNEL/MODULE PARAMETERS ***************************/ |
| |
| /* declare driver module init/cleanup functions */ |
| module_init(zfcp_module_init); |
| |
| MODULE_AUTHOR("IBM Deutschland Entwicklung GmbH - linux390@de.ibm.com"); |
| MODULE_DESCRIPTION |
| ("FCP (SCSI over Fibre Channel) HBA driver for IBM System z9 and zSeries"); |
| MODULE_LICENSE("GPL"); |
| |
| module_param(device, charp, 0400); |
| MODULE_PARM_DESC(device, "specify initial device"); |
| |
| module_param(loglevel, uint, 0400); |
| MODULE_PARM_DESC(loglevel, |
| "log levels, 8 nibbles: " |
| "FC ERP QDIO CIO Config FSF SCSI Other, " |
| "levels: 0=none 1=normal 2=devel 3=trace"); |
| |
| /****************************************************************/ |
| /************** Functions without logging ***********************/ |
| /****************************************************************/ |
| |
| void |
| _zfcp_hex_dump(char *addr, int count) |
| { |
| int i; |
| for (i = 0; i < count; i++) { |
| printk("%02x", addr[i]); |
| if ((i % 4) == 3) |
| printk(" "); |
| if ((i % 32) == 31) |
| printk("\n"); |
| } |
| if (((i-1) % 32) != 31) |
| printk("\n"); |
| } |
| |
| /****************************************************************/ |
| /************** Uncategorised Functions *************************/ |
| /****************************************************************/ |
| |
| #define ZFCP_LOG_AREA ZFCP_LOG_AREA_OTHER |
| |
| /** |
| * zfcp_device_setup - setup function |
| * @str: pointer to parameter string |
| * |
| * Parse "device=..." parameter string. |
| */ |
| static int __init |
| zfcp_device_setup(char *devstr) |
| { |
| char *tmp, *str; |
| size_t len; |
| |
| if (!devstr) |
| return 0; |
| |
| len = strlen(devstr) + 1; |
| str = (char *) kmalloc(len, GFP_KERNEL); |
| if (!str) |
| goto err_out; |
| memcpy(str, devstr, len); |
| |
| tmp = strchr(str, ','); |
| if (!tmp) |
| goto err_out; |
| *tmp++ = '\0'; |
| strncpy(zfcp_data.init_busid, str, BUS_ID_SIZE); |
| zfcp_data.init_busid[BUS_ID_SIZE-1] = '\0'; |
| |
| zfcp_data.init_wwpn = simple_strtoull(tmp, &tmp, 0); |
| if (*tmp++ != ',') |
| goto err_out; |
| if (*tmp == '\0') |
| goto err_out; |
| |
| zfcp_data.init_fcp_lun = simple_strtoull(tmp, &tmp, 0); |
| if (*tmp != '\0') |
| goto err_out; |
| kfree(str); |
| return 1; |
| |
| err_out: |
| ZFCP_LOG_NORMAL("Parse error for device parameter string %s\n", str); |
| kfree(str); |
| return 0; |
| } |
| |
| static void __init |
| zfcp_init_device_configure(void) |
| { |
| struct zfcp_adapter *adapter; |
| struct zfcp_port *port; |
| struct zfcp_unit *unit; |
| |
| down(&zfcp_data.config_sema); |
| read_lock_irq(&zfcp_data.config_lock); |
| adapter = zfcp_get_adapter_by_busid(zfcp_data.init_busid); |
| if (adapter) |
| zfcp_adapter_get(adapter); |
| read_unlock_irq(&zfcp_data.config_lock); |
| |
| if (adapter == NULL) |
| goto out_adapter; |
| port = zfcp_port_enqueue(adapter, zfcp_data.init_wwpn, 0, 0); |
| if (!port) |
| goto out_port; |
| unit = zfcp_unit_enqueue(port, zfcp_data.init_fcp_lun); |
| if (!unit) |
| goto out_unit; |
| up(&zfcp_data.config_sema); |
| ccw_device_set_online(adapter->ccw_device); |
| zfcp_erp_wait(adapter); |
| down(&zfcp_data.config_sema); |
| zfcp_unit_put(unit); |
| out_unit: |
| zfcp_port_put(port); |
| out_port: |
| zfcp_adapter_put(adapter); |
| out_adapter: |
| up(&zfcp_data.config_sema); |
| return; |
| } |
| |
| static int __init |
| zfcp_module_init(void) |
| { |
| |
| int retval = 0; |
| |
| atomic_set(&zfcp_data.loglevel, loglevel); |
| |
| /* initialize adapter list */ |
| INIT_LIST_HEAD(&zfcp_data.adapter_list_head); |
| |
| /* initialize adapters to be removed list head */ |
| INIT_LIST_HEAD(&zfcp_data.adapter_remove_lh); |
| |
| zfcp_transport_template = fc_attach_transport(&zfcp_transport_functions); |
| if (!zfcp_transport_template) |
| return -ENODEV; |
| |
| retval = misc_register(&zfcp_cfdc_misc); |
| if (retval != 0) { |
| ZFCP_LOG_INFO("registration of misc device " |
| "zfcp_cfdc failed\n"); |
| goto out; |
| } |
| |
| ZFCP_LOG_TRACE("major/minor for zfcp_cfdc: %d/%d\n", |
| ZFCP_CFDC_DEV_MAJOR, zfcp_cfdc_misc.minor); |
| |
| /* Initialise proc semaphores */ |
| sema_init(&zfcp_data.config_sema, 1); |
| |
| /* initialise configuration rw lock */ |
| rwlock_init(&zfcp_data.config_lock); |
| |
| /* save address of data structure managing the driver module */ |
| zfcp_data.scsi_host_template.module = THIS_MODULE; |
| |
| /* setup dynamic I/O */ |
| retval = zfcp_ccw_register(); |
| if (retval) { |
| ZFCP_LOG_NORMAL("registration with common I/O layer failed\n"); |
| goto out_ccw_register; |
| } |
| |
| if (zfcp_device_setup(device)) |
| zfcp_init_device_configure(); |
| |
| goto out; |
| |
| out_ccw_register: |
| misc_deregister(&zfcp_cfdc_misc); |
| out: |
| return retval; |
| } |
| |
| /* |
| * function: zfcp_cfdc_dev_ioctl |
| * |
| * purpose: Handle control file upload/download transaction via IOCTL |
| * interface |
| * |
| * returns: 0 - Operation completed successfuly |
| * -ENOTTY - Unknown IOCTL command |
| * -EINVAL - Invalid sense data record |
| * -ENXIO - The FCP adapter is not available |
| * -EOPNOTSUPP - The FCP adapter does not have CFDC support |
| * -ENOMEM - Insufficient memory |
| * -EFAULT - User space memory I/O operation fault |
| * -EPERM - Cannot create or queue FSF request or create SBALs |
| * -ERESTARTSYS- Received signal (is mapped to EAGAIN by VFS) |
| */ |
| static long |
| zfcp_cfdc_dev_ioctl(struct file *file, unsigned int command, |
| unsigned long buffer) |
| { |
| struct zfcp_cfdc_sense_data *sense_data, __user *sense_data_user; |
| struct zfcp_adapter *adapter = NULL; |
| struct zfcp_fsf_req *fsf_req = NULL; |
| struct zfcp_sg_list *sg_list = NULL; |
| u32 fsf_command, option; |
| char *bus_id = NULL; |
| int retval = 0; |
| |
| sense_data = kmalloc(sizeof(struct zfcp_cfdc_sense_data), GFP_KERNEL); |
| if (sense_data == NULL) { |
| retval = -ENOMEM; |
| goto out; |
| } |
| |
| sg_list = kzalloc(sizeof(struct zfcp_sg_list), GFP_KERNEL); |
| if (sg_list == NULL) { |
| retval = -ENOMEM; |
| goto out; |
| } |
| |
| if (command != ZFCP_CFDC_IOC) { |
| ZFCP_LOG_INFO("IOC request code 0x%x invalid\n", command); |
| retval = -ENOTTY; |
| goto out; |
| } |
| |
| if ((sense_data_user = (void __user *) buffer) == NULL) { |
| ZFCP_LOG_INFO("sense data record is required\n"); |
| retval = -EINVAL; |
| goto out; |
| } |
| |
| retval = copy_from_user(sense_data, sense_data_user, |
| sizeof(struct zfcp_cfdc_sense_data)); |
| if (retval) { |
| retval = -EFAULT; |
| goto out; |
| } |
| |
| if (sense_data->signature != ZFCP_CFDC_SIGNATURE) { |
| ZFCP_LOG_INFO("invalid sense data request signature 0x%08x\n", |
| ZFCP_CFDC_SIGNATURE); |
| retval = -EINVAL; |
| goto out; |
| } |
| |
| switch (sense_data->command) { |
| |
| case ZFCP_CFDC_CMND_DOWNLOAD_NORMAL: |
| fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; |
| option = FSF_CFDC_OPTION_NORMAL_MODE; |
| break; |
| |
| case ZFCP_CFDC_CMND_DOWNLOAD_FORCE: |
| fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; |
| option = FSF_CFDC_OPTION_FORCE; |
| break; |
| |
| case ZFCP_CFDC_CMND_FULL_ACCESS: |
| fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; |
| option = FSF_CFDC_OPTION_FULL_ACCESS; |
| break; |
| |
| case ZFCP_CFDC_CMND_RESTRICTED_ACCESS: |
| fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; |
| option = FSF_CFDC_OPTION_RESTRICTED_ACCESS; |
| break; |
| |
| case ZFCP_CFDC_CMND_UPLOAD: |
| fsf_command = FSF_QTCB_UPLOAD_CONTROL_FILE; |
| option = 0; |
| break; |
| |
| default: |
| ZFCP_LOG_INFO("invalid command code 0x%08x\n", |
| sense_data->command); |
| retval = -EINVAL; |
| goto out; |
| } |
| |
| bus_id = kmalloc(BUS_ID_SIZE, GFP_KERNEL); |
| if (bus_id == NULL) { |
| retval = -ENOMEM; |
| goto out; |
| } |
| snprintf(bus_id, BUS_ID_SIZE, "%d.%d.%04x", |
| (sense_data->devno >> 24), |
| (sense_data->devno >> 16) & 0xFF, |
| (sense_data->devno & 0xFFFF)); |
| |
| read_lock_irq(&zfcp_data.config_lock); |
| adapter = zfcp_get_adapter_by_busid(bus_id); |
| if (adapter) |
| zfcp_adapter_get(adapter); |
| read_unlock_irq(&zfcp_data.config_lock); |
| |
| kfree(bus_id); |
| |
| if (adapter == NULL) { |
| ZFCP_LOG_INFO("invalid adapter\n"); |
| retval = -ENXIO; |
| goto out; |
| } |
| |
| if (sense_data->command & ZFCP_CFDC_WITH_CONTROL_FILE) { |
| retval = zfcp_sg_list_alloc(sg_list, |
| ZFCP_CFDC_MAX_CONTROL_FILE_SIZE); |
| if (retval) { |
| retval = -ENOMEM; |
| goto out; |
| } |
| } |
| |
| if ((sense_data->command & ZFCP_CFDC_DOWNLOAD) && |
| (sense_data->command & ZFCP_CFDC_WITH_CONTROL_FILE)) { |
| retval = zfcp_sg_list_copy_from_user( |
| sg_list, &sense_data_user->control_file, |
| ZFCP_CFDC_MAX_CONTROL_FILE_SIZE); |
| if (retval) { |
| retval = -EFAULT; |
| goto out; |
| } |
| } |
| |
| retval = zfcp_fsf_control_file(adapter, &fsf_req, fsf_command, |
| option, sg_list); |
| if (retval) |
| goto out; |
| |
| if ((fsf_req->qtcb->prefix.prot_status != FSF_PROT_GOOD) && |
| (fsf_req->qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) { |
| retval = -ENXIO; |
| goto out; |
| } |
| |
| sense_data->fsf_status = fsf_req->qtcb->header.fsf_status; |
| memcpy(&sense_data->fsf_status_qual, |
| &fsf_req->qtcb->header.fsf_status_qual, |
| sizeof(union fsf_status_qual)); |
| memcpy(&sense_data->payloads, &fsf_req->qtcb->bottom.support.els, 256); |
| |
| retval = copy_to_user(sense_data_user, sense_data, |
| sizeof(struct zfcp_cfdc_sense_data)); |
| if (retval) { |
| retval = -EFAULT; |
| goto out; |
| } |
| |
| if (sense_data->command & ZFCP_CFDC_UPLOAD) { |
| retval = zfcp_sg_list_copy_to_user( |
| &sense_data_user->control_file, sg_list, |
| ZFCP_CFDC_MAX_CONTROL_FILE_SIZE); |
| if (retval) { |
| retval = -EFAULT; |
| goto out; |
| } |
| } |
| |
| out: |
| if (fsf_req != NULL) |
| zfcp_fsf_req_free(fsf_req); |
| |
| if ((adapter != NULL) && (retval != -ENXIO)) |
| zfcp_adapter_put(adapter); |
| |
| if (sg_list != NULL) { |
| zfcp_sg_list_free(sg_list); |
| kfree(sg_list); |
| } |
| |
| kfree(sense_data); |
| |
| return retval; |
| } |
| |
| |
| /** |
| * zfcp_sg_list_alloc - create a scatter-gather list of the specified size |
| * @sg_list: structure describing a scatter gather list |
| * @size: size of scatter-gather list |
| * Return: 0 on success, else -ENOMEM |
| * |
| * In sg_list->sg a pointer to the created scatter-gather list is returned, |
| * or NULL if we run out of memory. sg_list->count specifies the number of |
| * elements of the scatter-gather list. The maximum size of a single element |
| * in the scatter-gather list is PAGE_SIZE. |
| */ |
| static inline int |
| zfcp_sg_list_alloc(struct zfcp_sg_list *sg_list, size_t size) |
| { |
| struct scatterlist *sg; |
| unsigned int i; |
| int retval = 0; |
| void *address; |
| |
| BUG_ON(sg_list == NULL); |
| |
| sg_list->count = size >> PAGE_SHIFT; |
| if (size & ~PAGE_MASK) |
| sg_list->count++; |
| sg_list->sg = kcalloc(sg_list->count, sizeof(struct scatterlist), |
| GFP_KERNEL); |
| if (sg_list->sg == NULL) { |
| sg_list->count = 0; |
| retval = -ENOMEM; |
| goto out; |
| } |
| |
| for (i = 0, sg = sg_list->sg; i < sg_list->count; i++, sg++) { |
| sg->length = min(size, PAGE_SIZE); |
| sg->offset = 0; |
| address = (void *) get_zeroed_page(GFP_KERNEL); |
| if (address == NULL) { |
| sg_list->count = i; |
| zfcp_sg_list_free(sg_list); |
| retval = -ENOMEM; |
| goto out; |
| } |
| zfcp_address_to_sg(address, sg); |
| size -= sg->length; |
| } |
| |
| out: |
| return retval; |
| } |
| |
| |
| /** |
| * zfcp_sg_list_free - free memory of a scatter-gather list |
| * @sg_list: structure describing a scatter-gather list |
| * |
| * Memory for each element in the scatter-gather list is freed. |
| * Finally sg_list->sg is freed itself and sg_list->count is reset. |
| */ |
| static inline void |
| zfcp_sg_list_free(struct zfcp_sg_list *sg_list) |
| { |
| struct scatterlist *sg; |
| unsigned int i; |
| |
| BUG_ON(sg_list == NULL); |
| |
| for (i = 0, sg = sg_list->sg; i < sg_list->count; i++, sg++) |
| free_page((unsigned long) zfcp_sg_to_address(sg)); |
| |
| sg_list->count = 0; |
| kfree(sg_list->sg); |
| } |
| |
| /** |
| * zfcp_sg_size - determine size of a scatter-gather list |
| * @sg: array of (struct scatterlist) |
| * @sg_count: elements in array |
| * Return: size of entire scatter-gather list |
| */ |
| size_t |
| zfcp_sg_size(struct scatterlist *sg, unsigned int sg_count) |
| { |
| unsigned int i; |
| struct scatterlist *p; |
| size_t size; |
| |
| size = 0; |
| for (i = 0, p = sg; i < sg_count; i++, p++) { |
| BUG_ON(p == NULL); |
| size += p->length; |
| } |
| |
| return size; |
| } |
| |
| |
| /** |
| * zfcp_sg_list_copy_from_user -copy data from user space to scatter-gather list |
| * @sg_list: structure describing a scatter-gather list |
| * @user_buffer: pointer to buffer in user space |
| * @size: number of bytes to be copied |
| * Return: 0 on success, -EFAULT if copy_from_user fails. |
| */ |
| static inline int |
| zfcp_sg_list_copy_from_user(struct zfcp_sg_list *sg_list, |
| void __user *user_buffer, |
| size_t size) |
| { |
| struct scatterlist *sg; |
| unsigned int length; |
| void *zfcp_buffer; |
| int retval = 0; |
| |
| BUG_ON(sg_list == NULL); |
| |
| if (zfcp_sg_size(sg_list->sg, sg_list->count) < size) |
| return -EFAULT; |
| |
| for (sg = sg_list->sg; size > 0; sg++) { |
| length = min((unsigned int)size, sg->length); |
| zfcp_buffer = zfcp_sg_to_address(sg); |
| if (copy_from_user(zfcp_buffer, user_buffer, length)) { |
| retval = -EFAULT; |
| goto out; |
| } |
| user_buffer += length; |
| size -= length; |
| } |
| |
| out: |
| return retval; |
| } |
| |
| |
| /** |
| * zfcp_sg_list_copy_to_user - copy data from scatter-gather list to user space |
| * @user_buffer: pointer to buffer in user space |
| * @sg_list: structure describing a scatter-gather list |
| * @size: number of bytes to be copied |
| * Return: 0 on success, -EFAULT if copy_to_user fails |
| */ |
| static inline int |
| zfcp_sg_list_copy_to_user(void __user *user_buffer, |
| struct zfcp_sg_list *sg_list, |
| size_t size) |
| { |
| struct scatterlist *sg; |
| unsigned int length; |
| void *zfcp_buffer; |
| int retval = 0; |
| |
| BUG_ON(sg_list == NULL); |
| |
| if (zfcp_sg_size(sg_list->sg, sg_list->count) < size) |
| return -EFAULT; |
| |
| for (sg = sg_list->sg; size > 0; sg++) { |
| length = min((unsigned int) size, sg->length); |
| zfcp_buffer = zfcp_sg_to_address(sg); |
| if (copy_to_user(user_buffer, zfcp_buffer, length)) { |
| retval = -EFAULT; |
| goto out; |
| } |
| user_buffer += length; |
| size -= length; |
| } |
| |
| out: |
| return retval; |
| } |
| |
| |
| #undef ZFCP_LOG_AREA |
| |
| /****************************************************************/ |
| /****** Functions for configuration/set-up of structures ********/ |
| /****************************************************************/ |
| |
| #define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG |
| |
| /** |
| * zfcp_get_unit_by_lun - find unit in unit list of port by FCP LUN |
| * @port: pointer to port to search for unit |
| * @fcp_lun: FCP LUN to search for |
| * Traverse list of all units of a port and return pointer to a unit |
| * with the given FCP LUN. |
| */ |
| struct zfcp_unit * |
| zfcp_get_unit_by_lun(struct zfcp_port *port, fcp_lun_t fcp_lun) |
| { |
| struct zfcp_unit *unit; |
| int found = 0; |
| |
| list_for_each_entry(unit, &port->unit_list_head, list) { |
| if ((unit->fcp_lun == fcp_lun) && |
| !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status)) |
| { |
| found = 1; |
| break; |
| } |
| } |
| return found ? unit : NULL; |
| } |
| |
| /** |
| * zfcp_get_port_by_wwpn - find port in port list of adapter by wwpn |
| * @adapter: pointer to adapter to search for port |
| * @wwpn: wwpn to search for |
| * Traverse list of all ports of an adapter and return pointer to a port |
| * with the given wwpn. |
| */ |
| struct zfcp_port * |
| zfcp_get_port_by_wwpn(struct zfcp_adapter *adapter, wwn_t wwpn) |
| { |
| struct zfcp_port *port; |
| int found = 0; |
| |
| list_for_each_entry(port, &adapter->port_list_head, list) { |
| if ((port->wwpn == wwpn) && |
| !(atomic_read(&port->status) & |
| (ZFCP_STATUS_PORT_NO_WWPN | ZFCP_STATUS_COMMON_REMOVE))) { |
| found = 1; |
| break; |
| } |
| } |
| return found ? port : NULL; |
| } |
| |
| /** |
| * zfcp_get_port_by_did - find port in port list of adapter by d_id |
| * @adapter: pointer to adapter to search for port |
| * @d_id: d_id to search for |
| * Traverse list of all ports of an adapter and return pointer to a port |
| * with the given d_id. |
| */ |
| struct zfcp_port * |
| zfcp_get_port_by_did(struct zfcp_adapter *adapter, u32 d_id) |
| { |
| struct zfcp_port *port; |
| int found = 0; |
| |
| list_for_each_entry(port, &adapter->port_list_head, list) { |
| if ((port->d_id == d_id) && |
| !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) |
| { |
| found = 1; |
| break; |
| } |
| } |
| return found ? port : NULL; |
| } |
| |
| /** |
| * zfcp_get_adapter_by_busid - find adpater in adapter list by bus_id |
| * @bus_id: bus_id to search for |
| * Traverse list of all adapters and return pointer to an adapter |
| * with the given bus_id. |
| */ |
| struct zfcp_adapter * |
| zfcp_get_adapter_by_busid(char *bus_id) |
| { |
| struct zfcp_adapter *adapter; |
| int found = 0; |
| |
| list_for_each_entry(adapter, &zfcp_data.adapter_list_head, list) { |
| if ((strncmp(bus_id, zfcp_get_busid_by_adapter(adapter), |
| BUS_ID_SIZE) == 0) && |
| !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, |
| &adapter->status)){ |
| found = 1; |
| break; |
| } |
| } |
| return found ? adapter : NULL; |
| } |
| |
| /** |
| * zfcp_unit_enqueue - enqueue unit to unit list of a port. |
| * @port: pointer to port where unit is added |
| * @fcp_lun: FCP LUN of unit to be enqueued |
| * Return: pointer to enqueued unit on success, NULL on error |
| * Locks: config_sema must be held to serialize changes to the unit list |
| * |
| * Sets up some unit internal structures and creates sysfs entry. |
| */ |
| struct zfcp_unit * |
| zfcp_unit_enqueue(struct zfcp_port *port, fcp_lun_t fcp_lun) |
| { |
| struct zfcp_unit *unit, *tmp_unit; |
| scsi_lun_t scsi_lun; |
| int found; |
| |
| /* |
| * check that there is no unit with this FCP_LUN already in list |
| * and enqueue it. |
| * Note: Unlike for the adapter and the port, this is an error |
| */ |
| read_lock_irq(&zfcp_data.config_lock); |
| unit = zfcp_get_unit_by_lun(port, fcp_lun); |
| read_unlock_irq(&zfcp_data.config_lock); |
| if (unit) |
| return NULL; |
| |
| unit = kzalloc(sizeof (struct zfcp_unit), GFP_KERNEL); |
| if (!unit) |
| return NULL; |
| |
| /* initialise reference count stuff */ |
| atomic_set(&unit->refcount, 0); |
| init_waitqueue_head(&unit->remove_wq); |
| |
| unit->port = port; |
| unit->fcp_lun = fcp_lun; |
| |
| /* setup for sysfs registration */ |
| snprintf(unit->sysfs_device.bus_id, BUS_ID_SIZE, "0x%016llx", fcp_lun); |
| unit->sysfs_device.parent = &port->sysfs_device; |
| unit->sysfs_device.release = zfcp_sysfs_unit_release; |
| dev_set_drvdata(&unit->sysfs_device, unit); |
| |
| /* mark unit unusable as long as sysfs registration is not complete */ |
| atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status); |
| |
| if (device_register(&unit->sysfs_device)) { |
| kfree(unit); |
| return NULL; |
| } |
| |
| if (zfcp_sysfs_unit_create_files(&unit->sysfs_device)) { |
| device_unregister(&unit->sysfs_device); |
| return NULL; |
| } |
| |
| zfcp_unit_get(unit); |
| |
| scsi_lun = 0; |
| found = 0; |
| write_lock_irq(&zfcp_data.config_lock); |
| list_for_each_entry(tmp_unit, &port->unit_list_head, list) { |
| if (tmp_unit->scsi_lun != scsi_lun) { |
| found = 1; |
| break; |
| } |
| scsi_lun++; |
| } |
| unit->scsi_lun = scsi_lun; |
| if (found) |
| list_add_tail(&unit->list, &tmp_unit->list); |
| else |
| list_add_tail(&unit->list, &port->unit_list_head); |
| atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status); |
| atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &unit->status); |
| write_unlock_irq(&zfcp_data.config_lock); |
| |
| port->units++; |
| zfcp_port_get(port); |
| |
| return unit; |
| } |
| |
| void |
| zfcp_unit_dequeue(struct zfcp_unit *unit) |
| { |
| zfcp_unit_wait(unit); |
| write_lock_irq(&zfcp_data.config_lock); |
| list_del(&unit->list); |
| write_unlock_irq(&zfcp_data.config_lock); |
| unit->port->units--; |
| zfcp_port_put(unit->port); |
| zfcp_sysfs_unit_remove_files(&unit->sysfs_device); |
| device_unregister(&unit->sysfs_device); |
| } |
| |
| /* |
| * Allocates a combined QTCB/fsf_req buffer for erp actions and fcp/SCSI |
| * commands. |
| * It also genrates fcp-nameserver request/response buffer and unsolicited |
| * status read fsf_req buffers. |
| * |
| * locks: must only be called with zfcp_data.config_sema taken |
| */ |
| static int |
| zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter) |
| { |
| adapter->pool.fsf_req_erp = |
| mempool_create_kmalloc_pool(ZFCP_POOL_FSF_REQ_ERP_NR, |
| sizeof(struct zfcp_fsf_req_pool_element)); |
| if (!adapter->pool.fsf_req_erp) |
| return -ENOMEM; |
| |
| adapter->pool.fsf_req_scsi = |
| mempool_create_kmalloc_pool(ZFCP_POOL_FSF_REQ_SCSI_NR, |
| sizeof(struct zfcp_fsf_req_pool_element)); |
| if (!adapter->pool.fsf_req_scsi) |
| return -ENOMEM; |
| |
| adapter->pool.fsf_req_abort = |
| mempool_create_kmalloc_pool(ZFCP_POOL_FSF_REQ_ABORT_NR, |
| sizeof(struct zfcp_fsf_req_pool_element)); |
| if (!adapter->pool.fsf_req_abort) |
| return -ENOMEM; |
| |
| adapter->pool.fsf_req_status_read = |
| mempool_create_kmalloc_pool(ZFCP_POOL_STATUS_READ_NR, |
| sizeof(struct zfcp_fsf_req)); |
| if (!adapter->pool.fsf_req_status_read) |
| return -ENOMEM; |
| |
| adapter->pool.data_status_read = |
| mempool_create_kmalloc_pool(ZFCP_POOL_STATUS_READ_NR, |
| sizeof(struct fsf_status_read_buffer)); |
| if (!adapter->pool.data_status_read) |
| return -ENOMEM; |
| |
| adapter->pool.data_gid_pn = |
| mempool_create_kmalloc_pool(ZFCP_POOL_DATA_GID_PN_NR, |
| sizeof(struct zfcp_gid_pn_data)); |
| if (!adapter->pool.data_gid_pn) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| /** |
| * zfcp_free_low_mem_buffers - free memory pools of an adapter |
| * @adapter: pointer to zfcp_adapter for which memory pools should be freed |
| * locking: zfcp_data.config_sema must be held |
| */ |
| static void |
| zfcp_free_low_mem_buffers(struct zfcp_adapter *adapter) |
| { |
| if (adapter->pool.fsf_req_erp) |
| mempool_destroy(adapter->pool.fsf_req_erp); |
| if (adapter->pool.fsf_req_scsi) |
| mempool_destroy(adapter->pool.fsf_req_scsi); |
| if (adapter->pool.fsf_req_abort) |
| mempool_destroy(adapter->pool.fsf_req_abort); |
| if (adapter->pool.fsf_req_status_read) |
| mempool_destroy(adapter->pool.fsf_req_status_read); |
| if (adapter->pool.data_status_read) |
| mempool_destroy(adapter->pool.data_status_read); |
| if (adapter->pool.data_gid_pn) |
| mempool_destroy(adapter->pool.data_gid_pn); |
| } |
| |
| void |
| zfcp_dummy_release(struct device *dev) |
| { |
| return; |
| } |
| |
| /* |
| * Enqueues an adapter at the end of the adapter list in the driver data. |
| * All adapter internal structures are set up. |
| * Proc-fs entries are also created. |
| * |
| * returns: 0 if a new adapter was successfully enqueued |
| * ZFCP_KNOWN if an adapter with this devno was already present |
| * -ENOMEM if alloc failed |
| * locks: config_sema must be held to serialise changes to the adapter list |
| */ |
| struct zfcp_adapter * |
| zfcp_adapter_enqueue(struct ccw_device *ccw_device) |
| { |
| int retval = 0; |
| struct zfcp_adapter *adapter; |
| |
| /* |
| * Note: It is safe to release the list_lock, as any list changes |
| * are protected by the config_sema, which must be held to get here |
| */ |
| |
| /* try to allocate new adapter data structure (zeroed) */ |
| adapter = kzalloc(sizeof (struct zfcp_adapter), GFP_KERNEL); |
| if (!adapter) { |
| ZFCP_LOG_INFO("error: allocation of base adapter " |
| "structure failed\n"); |
| goto out; |
| } |
| |
| ccw_device->handler = NULL; |
| |
| /* save ccw_device pointer */ |
| adapter->ccw_device = ccw_device; |
| |
| retval = zfcp_qdio_allocate_queues(adapter); |
| if (retval) |
| goto queues_alloc_failed; |
| |
| retval = zfcp_qdio_allocate(adapter); |
| if (retval) |
| goto qdio_allocate_failed; |
| |
| retval = zfcp_allocate_low_mem_buffers(adapter); |
| if (retval) { |
| ZFCP_LOG_INFO("error: pool allocation failed\n"); |
| goto failed_low_mem_buffers; |
| } |
| |
| /* initialise reference count stuff */ |
| atomic_set(&adapter->refcount, 0); |
| init_waitqueue_head(&adapter->remove_wq); |
| |
| /* initialise list of ports */ |
| INIT_LIST_HEAD(&adapter->port_list_head); |
| |
| /* initialise list of ports to be removed */ |
| INIT_LIST_HEAD(&adapter->port_remove_lh); |
| |
| /* initialize list of fsf requests */ |
| spin_lock_init(&adapter->fsf_req_list_lock); |
| INIT_LIST_HEAD(&adapter->fsf_req_list_head); |
| |
| /* initialize debug locks */ |
| |
| spin_lock_init(&adapter->erp_dbf_lock); |
| spin_lock_init(&adapter->hba_dbf_lock); |
| spin_lock_init(&adapter->san_dbf_lock); |
| spin_lock_init(&adapter->scsi_dbf_lock); |
| |
| /* initialize error recovery stuff */ |
| |
| rwlock_init(&adapter->erp_lock); |
| sema_init(&adapter->erp_ready_sem, 0); |
| INIT_LIST_HEAD(&adapter->erp_ready_head); |
| INIT_LIST_HEAD(&adapter->erp_running_head); |
| |
| /* initialize abort lock */ |
| rwlock_init(&adapter->abort_lock); |
| |
| /* initialise some erp stuff */ |
| init_waitqueue_head(&adapter->erp_thread_wqh); |
| init_waitqueue_head(&adapter->erp_done_wqh); |
| |
| /* initialize lock of associated request queue */ |
| rwlock_init(&adapter->request_queue.queue_lock); |
| |
| /* intitialise SCSI ER timer */ |
| init_timer(&adapter->scsi_er_timer); |
| |
| /* set FC service class used per default */ |
| adapter->fc_service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT; |
| |
| sprintf(adapter->name, "%s", zfcp_get_busid_by_adapter(adapter)); |
| ASCEBC(adapter->name, strlen(adapter->name)); |
| |
| /* mark adapter unusable as long as sysfs registration is not complete */ |
| atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status); |
| |
| adapter->ccw_device = ccw_device; |
| dev_set_drvdata(&ccw_device->dev, adapter); |
| |
| if (zfcp_sysfs_adapter_create_files(&ccw_device->dev)) |
| goto sysfs_failed; |
| |
| adapter->generic_services.parent = &adapter->ccw_device->dev; |
| adapter->generic_services.release = zfcp_dummy_release; |
| snprintf(adapter->generic_services.bus_id, BUS_ID_SIZE, |
| "generic_services"); |
| |
| if (device_register(&adapter->generic_services)) |
| goto generic_services_failed; |
| |
| /* put allocated adapter at list tail */ |
| write_lock_irq(&zfcp_data.config_lock); |
| atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status); |
| list_add_tail(&adapter->list, &zfcp_data.adapter_list_head); |
| write_unlock_irq(&zfcp_data.config_lock); |
| |
| zfcp_data.adapters++; |
| |
| goto out; |
| |
| generic_services_failed: |
| zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev); |
| sysfs_failed: |
| dev_set_drvdata(&ccw_device->dev, NULL); |
| failed_low_mem_buffers: |
| zfcp_free_low_mem_buffers(adapter); |
| if (qdio_free(ccw_device) != 0) |
| ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| qdio_allocate_failed: |
| zfcp_qdio_free_queues(adapter); |
| queues_alloc_failed: |
| kfree(adapter); |
| adapter = NULL; |
| out: |
| return adapter; |
| } |
| |
| /* |
| * returns: 0 - struct zfcp_adapter data structure successfully removed |
| * !0 - struct zfcp_adapter data structure could not be removed |
| * (e.g. still used) |
| * locks: adapter list write lock is assumed to be held by caller |
| * adapter->fsf_req_list_lock is taken and released within this |
| * function and must not be held on entry |
| */ |
| void |
| zfcp_adapter_dequeue(struct zfcp_adapter *adapter) |
| { |
| int retval = 0; |
| unsigned long flags; |
| |
| device_unregister(&adapter->generic_services); |
| zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev); |
| dev_set_drvdata(&adapter->ccw_device->dev, NULL); |
| /* sanity check: no pending FSF requests */ |
| spin_lock_irqsave(&adapter->fsf_req_list_lock, flags); |
| retval = !list_empty(&adapter->fsf_req_list_head); |
| spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); |
| if (retval) { |
| ZFCP_LOG_NORMAL("bug: adapter %s (%p) still in use, " |
| "%i requests outstanding\n", |
| zfcp_get_busid_by_adapter(adapter), adapter, |
| atomic_read(&adapter->fsf_reqs_active)); |
| retval = -EBUSY; |
| goto out; |
| } |
| |
| /* remove specified adapter data structure from list */ |
| write_lock_irq(&zfcp_data.config_lock); |
| list_del(&adapter->list); |
| write_unlock_irq(&zfcp_data.config_lock); |
| |
| /* decrease number of adapters in list */ |
| zfcp_data.adapters--; |
| |
| ZFCP_LOG_TRACE("adapter %s (%p) removed from list, " |
| "%i adapters still in list\n", |
| zfcp_get_busid_by_adapter(adapter), |
| adapter, zfcp_data.adapters); |
| |
| retval = qdio_free(adapter->ccw_device); |
| if (retval) |
| ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| |
| zfcp_free_low_mem_buffers(adapter); |
| /* free memory of adapter data structure and queues */ |
| zfcp_qdio_free_queues(adapter); |
| kfree(adapter->fc_stats); |
| kfree(adapter->stats_reset_data); |
| ZFCP_LOG_TRACE("freeing adapter structure\n"); |
| kfree(adapter); |
| out: |
| return; |
| } |
| |
| /** |
| * zfcp_port_enqueue - enqueue port to port list of adapter |
| * @adapter: adapter where remote port is added |
| * @wwpn: WWPN of the remote port to be enqueued |
| * @status: initial status for the port |
| * @d_id: destination id of the remote port to be enqueued |
| * Return: pointer to enqueued port on success, NULL on error |
| * Locks: config_sema must be held to serialize changes to the port list |
| * |
| * All port internal structures are set up and the sysfs entry is generated. |
| * d_id is used to enqueue ports with a well known address like the Directory |
| * Service for nameserver lookup. |
| */ |
| struct zfcp_port * |
| zfcp_port_enqueue(struct zfcp_adapter *adapter, wwn_t wwpn, u32 status, |
| u32 d_id) |
| { |
| struct zfcp_port *port; |
| int check_wwpn; |
| |
| check_wwpn = !(status & ZFCP_STATUS_PORT_NO_WWPN); |
| /* |
| * check that there is no port with this WWPN already in list |
| */ |
| if (check_wwpn) { |
| read_lock_irq(&zfcp_data.config_lock); |
| port = zfcp_get_port_by_wwpn(adapter, wwpn); |
| read_unlock_irq(&zfcp_data.config_lock); |
| if (port) |
| return NULL; |
| } |
| |
| port = kzalloc(sizeof (struct zfcp_port), GFP_KERNEL); |
| if (!port) |
| return NULL; |
| |
| /* initialise reference count stuff */ |
| atomic_set(&port->refcount, 0); |
| init_waitqueue_head(&port->remove_wq); |
| |
| INIT_LIST_HEAD(&port->unit_list_head); |
| INIT_LIST_HEAD(&port->unit_remove_lh); |
| |
| port->adapter = adapter; |
| |
| if (check_wwpn) |
| port->wwpn = wwpn; |
| |
| atomic_set_mask(status, &port->status); |
| |
| /* setup for sysfs registration */ |
| if (status & ZFCP_STATUS_PORT_WKA) { |
| switch (d_id) { |
| case ZFCP_DID_DIRECTORY_SERVICE: |
| snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, |
| "directory"); |
| break; |
| case ZFCP_DID_MANAGEMENT_SERVICE: |
| snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, |
| "management"); |
| break; |
| case ZFCP_DID_KEY_DISTRIBUTION_SERVICE: |
| snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, |
| "key_distribution"); |
| break; |
| case ZFCP_DID_ALIAS_SERVICE: |
| snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, |
| "alias"); |
| break; |
| case ZFCP_DID_TIME_SERVICE: |
| snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, |
| "time"); |
| break; |
| default: |
| kfree(port); |
| return NULL; |
| } |
| port->d_id = d_id; |
| port->sysfs_device.parent = &adapter->generic_services; |
| } else { |
| snprintf(port->sysfs_device.bus_id, |
| BUS_ID_SIZE, "0x%016llx", wwpn); |
| port->sysfs_device.parent = &adapter->ccw_device->dev; |
| } |
| port->sysfs_device.release = zfcp_sysfs_port_release; |
| dev_set_drvdata(&port->sysfs_device, port); |
| |
| /* mark port unusable as long as sysfs registration is not complete */ |
| atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status); |
| |
| if (device_register(&port->sysfs_device)) { |
| kfree(port); |
| return NULL; |
| } |
| |
| if (zfcp_sysfs_port_create_files(&port->sysfs_device, status)) { |
| device_unregister(&port->sysfs_device); |
| return NULL; |
| } |
| |
| zfcp_port_get(port); |
| |
| write_lock_irq(&zfcp_data.config_lock); |
| list_add_tail(&port->list, &adapter->port_list_head); |
| atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status); |
| atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &port->status); |
| if (d_id == ZFCP_DID_DIRECTORY_SERVICE) |
| if (!adapter->nameserver_port) |
| adapter->nameserver_port = port; |
| adapter->ports++; |
| write_unlock_irq(&zfcp_data.config_lock); |
| |
| zfcp_adapter_get(adapter); |
| |
| return port; |
| } |
| |
| void |
| zfcp_port_dequeue(struct zfcp_port *port) |
| { |
| zfcp_port_wait(port); |
| write_lock_irq(&zfcp_data.config_lock); |
| list_del(&port->list); |
| port->adapter->ports--; |
| write_unlock_irq(&zfcp_data.config_lock); |
| if (port->rport) |
| fc_remote_port_delete(port->rport); |
| port->rport = NULL; |
| zfcp_adapter_put(port->adapter); |
| zfcp_sysfs_port_remove_files(&port->sysfs_device, |
| atomic_read(&port->status)); |
| device_unregister(&port->sysfs_device); |
| } |
| |
| /* Enqueues a nameserver port */ |
| int |
| zfcp_nameserver_enqueue(struct zfcp_adapter *adapter) |
| { |
| struct zfcp_port *port; |
| |
| port = zfcp_port_enqueue(adapter, 0, ZFCP_STATUS_PORT_WKA, |
| ZFCP_DID_DIRECTORY_SERVICE); |
| if (!port) { |
| ZFCP_LOG_INFO("error: enqueue of nameserver port for " |
| "adapter %s failed\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| return -ENXIO; |
| } |
| zfcp_port_put(port); |
| |
| return 0; |
| } |
| |
| #undef ZFCP_LOG_AREA |
| |
| /****************************************************************/ |
| /******* Fibre Channel Standard related Functions **************/ |
| /****************************************************************/ |
| |
| #define ZFCP_LOG_AREA ZFCP_LOG_AREA_FC |
| |
| void |
| zfcp_fsf_incoming_els_rscn(struct zfcp_adapter *adapter, |
| struct fsf_status_read_buffer *status_buffer) |
| { |
| struct fcp_rscn_head *fcp_rscn_head; |
| struct fcp_rscn_element *fcp_rscn_element; |
| struct zfcp_port *port; |
| u16 i; |
| u16 no_entries; |
| u32 range_mask; |
| unsigned long flags; |
| |
| fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload; |
| fcp_rscn_element = (struct fcp_rscn_element *) status_buffer->payload; |
| |
| /* see FC-FS */ |
| no_entries = (fcp_rscn_head->payload_len / 4); |
| |
| for (i = 1; i < no_entries; i++) { |
| /* skip head and start with 1st element */ |
| fcp_rscn_element++; |
| switch (fcp_rscn_element->addr_format) { |
| case ZFCP_PORT_ADDRESS: |
| range_mask = ZFCP_PORTS_RANGE_PORT; |
| break; |
| case ZFCP_AREA_ADDRESS: |
| range_mask = ZFCP_PORTS_RANGE_AREA; |
| break; |
| case ZFCP_DOMAIN_ADDRESS: |
| range_mask = ZFCP_PORTS_RANGE_DOMAIN; |
| break; |
| case ZFCP_FABRIC_ADDRESS: |
| range_mask = ZFCP_PORTS_RANGE_FABRIC; |
| break; |
| default: |
| ZFCP_LOG_INFO("incoming RSCN with unknown " |
| "address format\n"); |
| continue; |
| } |
| read_lock_irqsave(&zfcp_data.config_lock, flags); |
| list_for_each_entry(port, &adapter->port_list_head, list) { |
| if (atomic_test_mask |
| (ZFCP_STATUS_PORT_WKA, &port->status)) |
| continue; |
| /* Do we know this port? If not skip it. */ |
| if (!atomic_test_mask |
| (ZFCP_STATUS_PORT_DID_DID, &port->status)) { |
| ZFCP_LOG_INFO("incoming RSCN, trying to open " |
| "port 0x%016Lx\n", port->wwpn); |
| zfcp_erp_port_reopen(port, |
| ZFCP_STATUS_COMMON_ERP_FAILED); |
| continue; |
| } |
| |
| /* |
| * FIXME: race: d_id might being invalidated |
| * (...DID_DID reset) |
| */ |
| if ((port->d_id & range_mask) |
| == (fcp_rscn_element->nport_did & range_mask)) { |
| ZFCP_LOG_TRACE("reopen did 0x%08x\n", |
| fcp_rscn_element->nport_did); |
| /* |
| * Unfortunately, an RSCN does not specify the |
| * type of change a target underwent. We assume |
| * that it makes sense to reopen the link. |
| * FIXME: Shall we try to find out more about |
| * the target and link state before closing it? |
| * How to accomplish this? (nameserver?) |
| * Where would such code be put in? |
| * (inside or outside erp) |
| */ |
| ZFCP_LOG_INFO("incoming RSCN, trying to open " |
| "port 0x%016Lx\n", port->wwpn); |
| zfcp_test_link(port); |
| } |
| } |
| read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
| } |
| } |
| |
| static void |
| zfcp_fsf_incoming_els_plogi(struct zfcp_adapter *adapter, |
| struct fsf_status_read_buffer *status_buffer) |
| { |
| logi *els_logi = (logi *) status_buffer->payload; |
| struct zfcp_port *port; |
| unsigned long flags; |
| |
| read_lock_irqsave(&zfcp_data.config_lock, flags); |
| list_for_each_entry(port, &adapter->port_list_head, list) { |
| if (port->wwpn == (*(wwn_t *) & els_logi->nport_wwn)) |
| break; |
| } |
| read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
| |
| if (!port || (port->wwpn != (*(wwn_t *) & els_logi->nport_wwn))) { |
| ZFCP_LOG_DEBUG("ignored incoming PLOGI for nonexisting port " |
| "with d_id 0x%08x on adapter %s\n", |
| status_buffer->d_id, |
| zfcp_get_busid_by_adapter(adapter)); |
| } else { |
| zfcp_erp_port_forced_reopen(port, 0); |
| } |
| } |
| |
| static void |
| zfcp_fsf_incoming_els_logo(struct zfcp_adapter *adapter, |
| struct fsf_status_read_buffer *status_buffer) |
| { |
| struct fcp_logo *els_logo = (struct fcp_logo *) status_buffer->payload; |
| struct zfcp_port *port; |
| unsigned long flags; |
| |
| read_lock_irqsave(&zfcp_data.config_lock, flags); |
| list_for_each_entry(port, &adapter->port_list_head, list) { |
| if (port->wwpn == els_logo->nport_wwpn) |
| break; |
| } |
| read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
| |
| if (!port || (port->wwpn != els_logo->nport_wwpn)) { |
| ZFCP_LOG_DEBUG("ignored incoming LOGO for nonexisting port " |
| "with d_id 0x%08x on adapter %s\n", |
| status_buffer->d_id, |
| zfcp_get_busid_by_adapter(adapter)); |
| } else { |
| zfcp_erp_port_forced_reopen(port, 0); |
| } |
| } |
| |
| static void |
| zfcp_fsf_incoming_els_unknown(struct zfcp_adapter *adapter, |
| struct fsf_status_read_buffer *status_buffer) |
| { |
| ZFCP_LOG_NORMAL("warning: unknown incoming ELS 0x%08x " |
| "for adapter %s\n", *(u32 *) (status_buffer->payload), |
| zfcp_get_busid_by_adapter(adapter)); |
| |
| } |
| |
| void |
| zfcp_fsf_incoming_els(struct zfcp_fsf_req *fsf_req) |
| { |
| struct fsf_status_read_buffer *status_buffer; |
| u32 els_type; |
| struct zfcp_adapter *adapter; |
| |
| status_buffer = (struct fsf_status_read_buffer *) fsf_req->data; |
| els_type = *(u32 *) (status_buffer->payload); |
| adapter = fsf_req->adapter; |
| |
| zfcp_san_dbf_event_incoming_els(fsf_req); |
| if (els_type == LS_PLOGI) |
| zfcp_fsf_incoming_els_plogi(adapter, status_buffer); |
| else if (els_type == LS_LOGO) |
| zfcp_fsf_incoming_els_logo(adapter, status_buffer); |
| else if ((els_type & 0xffff0000) == LS_RSCN) |
| /* we are only concerned with the command, not the length */ |
| zfcp_fsf_incoming_els_rscn(adapter, status_buffer); |
| else |
| zfcp_fsf_incoming_els_unknown(adapter, status_buffer); |
| } |
| |
| |
| /** |
| * zfcp_gid_pn_buffers_alloc - allocate buffers for GID_PN nameserver request |
| * @gid_pn: pointer to return pointer to struct zfcp_gid_pn_data |
| * @pool: pointer to mempool_t if non-null memory pool is used for allocation |
| */ |
| static int |
| zfcp_gid_pn_buffers_alloc(struct zfcp_gid_pn_data **gid_pn, mempool_t *pool) |
| { |
| struct zfcp_gid_pn_data *data; |
| |
| if (pool != NULL) { |
| data = mempool_alloc(pool, GFP_ATOMIC); |
| if (likely(data != NULL)) { |
| data->ct.pool = pool; |
| } |
| } else { |
| data = kmalloc(sizeof(struct zfcp_gid_pn_data), GFP_ATOMIC); |
| } |
| |
| if (NULL == data) |
| return -ENOMEM; |
| |
| memset(data, 0, sizeof(*data)); |
| data->ct.req = &data->req; |
| data->ct.resp = &data->resp; |
| data->ct.req_count = data->ct.resp_count = 1; |
| zfcp_address_to_sg(&data->ct_iu_req, &data->req); |
| zfcp_address_to_sg(&data->ct_iu_resp, &data->resp); |
| data->req.length = sizeof(struct ct_iu_gid_pn_req); |
| data->resp.length = sizeof(struct ct_iu_gid_pn_resp); |
| |
| *gid_pn = data; |
| return 0; |
| } |
| |
| /** |
| * zfcp_gid_pn_buffers_free - free buffers for GID_PN nameserver request |
| * @gid_pn: pointer to struct zfcp_gid_pn_data which has to be freed |
| */ |
| static void |
| zfcp_gid_pn_buffers_free(struct zfcp_gid_pn_data *gid_pn) |
| { |
| if ((gid_pn->ct.pool != 0)) |
| mempool_free(gid_pn, gid_pn->ct.pool); |
| else |
| kfree(gid_pn); |
| |
| return; |
| } |
| |
| /** |
| * zfcp_ns_gid_pn_request - initiate GID_PN nameserver request |
| * @erp_action: pointer to zfcp_erp_action where GID_PN request is needed |
| */ |
| int |
| zfcp_ns_gid_pn_request(struct zfcp_erp_action *erp_action) |
| { |
| int ret; |
| struct ct_iu_gid_pn_req *ct_iu_req; |
| struct zfcp_gid_pn_data *gid_pn; |
| struct zfcp_adapter *adapter = erp_action->adapter; |
| |
| ret = zfcp_gid_pn_buffers_alloc(&gid_pn, adapter->pool.data_gid_pn); |
| if (ret < 0) { |
| ZFCP_LOG_INFO("error: buffer allocation for gid_pn nameserver " |
| "request failed for adapter %s\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| goto out; |
| } |
| |
| /* setup nameserver request */ |
| ct_iu_req = zfcp_sg_to_address(gid_pn->ct.req); |
| ct_iu_req->header.revision = ZFCP_CT_REVISION; |
| ct_iu_req->header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; |
| ct_iu_req->header.gs_subtype = ZFCP_CT_NAME_SERVER; |
| ct_iu_req->header.options = ZFCP_CT_SYNCHRONOUS; |
| ct_iu_req->header.cmd_rsp_code = ZFCP_CT_GID_PN; |
| ct_iu_req->header.max_res_size = ZFCP_CT_MAX_SIZE; |
| ct_iu_req->wwpn = erp_action->port->wwpn; |
| |
| /* setup parameters for send generic command */ |
| gid_pn->ct.port = adapter->nameserver_port; |
| gid_pn->ct.handler = zfcp_ns_gid_pn_handler; |
| gid_pn->ct.handler_data = (unsigned long) gid_pn; |
| gid_pn->ct.timeout = ZFCP_NS_GID_PN_TIMEOUT; |
| gid_pn->ct.timer = &erp_action->timer; |
| gid_pn->port = erp_action->port; |
| |
| ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.fsf_req_erp, |
| erp_action); |
| if (ret) { |
| ZFCP_LOG_INFO("error: initiation of gid_pn nameserver request " |
| "failed for adapter %s\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| |
| zfcp_gid_pn_buffers_free(gid_pn); |
| } |
| |
| out: |
| return ret; |
| } |
| |
| /** |
| * zfcp_ns_gid_pn_handler - handler for GID_PN nameserver request |
| * @data: unsigned long, contains pointer to struct zfcp_gid_pn_data |
| */ |
| static void zfcp_ns_gid_pn_handler(unsigned long data) |
| { |
| struct zfcp_port *port; |
| struct zfcp_send_ct *ct; |
| struct ct_iu_gid_pn_req *ct_iu_req; |
| struct ct_iu_gid_pn_resp *ct_iu_resp; |
| struct zfcp_gid_pn_data *gid_pn; |
| |
| |
| gid_pn = (struct zfcp_gid_pn_data *) data; |
| port = gid_pn->port; |
| ct = &gid_pn->ct; |
| ct_iu_req = zfcp_sg_to_address(ct->req); |
| ct_iu_resp = zfcp_sg_to_address(ct->resp); |
| |
| if (ct->status != 0) |
| goto failed; |
| |
| if (zfcp_check_ct_response(&ct_iu_resp->header)) { |
| /* FIXME: do we need some specific erp entry points */ |
| atomic_set_mask(ZFCP_STATUS_PORT_INVALID_WWPN, &port->status); |
| goto failed; |
| } |
| /* paranoia */ |
| if (ct_iu_req->wwpn != port->wwpn) { |
| ZFCP_LOG_NORMAL("bug: wwpn 0x%016Lx returned by nameserver " |
| "lookup does not match expected wwpn 0x%016Lx " |
| "for adapter %s\n", ct_iu_req->wwpn, port->wwpn, |
| zfcp_get_busid_by_port(port)); |
| goto mismatch; |
| } |
| |
| /* looks like a valid d_id */ |
| port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK; |
| atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status); |
| ZFCP_LOG_DEBUG("adapter %s: wwpn=0x%016Lx ---> d_id=0x%08x\n", |
| zfcp_get_busid_by_port(port), port->wwpn, port->d_id); |
| goto out; |
| |
| mismatch: |
| ZFCP_LOG_DEBUG("CT IUs do not match:\n"); |
| ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, (char *) ct_iu_req, |
| sizeof(struct ct_iu_gid_pn_req)); |
| ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, (char *) ct_iu_resp, |
| sizeof(struct ct_iu_gid_pn_resp)); |
| |
| failed: |
| ZFCP_LOG_NORMAL("warning: failed gid_pn nameserver request for wwpn " |
| "0x%016Lx for adapter %s\n", |
| port->wwpn, zfcp_get_busid_by_port(port)); |
| out: |
| zfcp_gid_pn_buffers_free(gid_pn); |
| return; |
| } |
| |
| /* reject CT_IU reason codes acc. to FC-GS-4 */ |
| static const struct zfcp_rc_entry zfcp_ct_rc[] = { |
| {0x01, "invalid command code"}, |
| {0x02, "invalid version level"}, |
| {0x03, "logical error"}, |
| {0x04, "invalid CT_IU size"}, |
| {0x05, "logical busy"}, |
| {0x07, "protocol error"}, |
| {0x09, "unable to perform command request"}, |
| {0x0b, "command not supported"}, |
| {0x0d, "server not available"}, |
| {0x0e, "session could not be established"}, |
| {0xff, "vendor specific error"}, |
| {0, NULL}, |
| }; |
| |
| /* LS_RJT reason codes acc. to FC-FS */ |
| static const struct zfcp_rc_entry zfcp_ls_rjt_rc[] = { |
| {0x01, "invalid LS_Command code"}, |
| {0x03, "logical error"}, |
| {0x05, "logical busy"}, |
| {0x07, "protocol error"}, |
| {0x09, "unable to perform command request"}, |
| {0x0b, "command not supported"}, |
| {0x0e, "command already in progress"}, |
| {0xff, "vendor specific error"}, |
| {0, NULL}, |
| }; |
| |
| /* reject reason codes according to FC-PH/FC-FS */ |
| static const struct zfcp_rc_entry zfcp_p_rjt_rc[] = { |
| {0x01, "invalid D_ID"}, |
| {0x02, "invalid S_ID"}, |
| {0x03, "Nx_Port not available, temporary"}, |
| {0x04, "Nx_Port not available, permament"}, |
| {0x05, "class not supported"}, |
| {0x06, "delimiter usage error"}, |
| {0x07, "TYPE not supported"}, |
| {0x08, "invalid Link_Control"}, |
| {0x09, "invalid R_CTL field"}, |
| {0x0a, "invalid F_CTL field"}, |
| {0x0b, "invalid OX_ID"}, |
| {0x0c, "invalid RX_ID"}, |
| {0x0d, "invalid SEQ_ID"}, |
| {0x0e, "invalid DF_CTL"}, |
| {0x0f, "invalid SEQ_CNT"}, |
| {0x10, "invalid parameter field"}, |
| {0x11, "exchange error"}, |
| {0x12, "protocol error"}, |
| {0x13, "incorrect length"}, |
| {0x14, "unsupported ACK"}, |
| {0x15, "class of service not supported by entity at FFFFFE"}, |
| {0x16, "login required"}, |
| {0x17, "excessive sequences attempted"}, |
| {0x18, "unable to establish exchange"}, |
| {0x1a, "fabric path not available"}, |
| {0x1b, "invalid VC_ID (class 4)"}, |
| {0x1c, "invalid CS_CTL field"}, |
| {0x1d, "insufficient resources for VC (class 4)"}, |
| {0x1f, "invalid class of service"}, |
| {0x20, "preemption request rejected"}, |
| {0x21, "preemption not enabled"}, |
| {0x22, "multicast error"}, |
| {0x23, "multicast error terminate"}, |
| {0x24, "process login required"}, |
| {0xff, "vendor specific reject"}, |
| {0, NULL}, |
| }; |
| |
| /** |
| * zfcp_rc_description - return description for given reaon code |
| * @code: reason code |
| * @rc_table: table of reason codes and descriptions |
| */ |
| static inline const char * |
| zfcp_rc_description(u8 code, const struct zfcp_rc_entry *rc_table) |
| { |
| const char *descr = "unknown reason code"; |
| |
| do { |
| if (code == rc_table->code) { |
| descr = rc_table->description; |
| break; |
| } |
| rc_table++; |
| } while (rc_table->code && rc_table->description); |
| |
| return descr; |
| } |
| |
| /** |
| * zfcp_check_ct_response - evaluate reason code for CT_IU |
| * @rjt: response payload to an CT_IU request |
| * Return: 0 for accept CT_IU, 1 for reject CT_IU or invlid response code |
| */ |
| int |
| zfcp_check_ct_response(struct ct_hdr *rjt) |
| { |
| if (rjt->cmd_rsp_code == ZFCP_CT_ACCEPT) |
| return 0; |
| |
| if (rjt->cmd_rsp_code != ZFCP_CT_REJECT) { |
| ZFCP_LOG_NORMAL("error: invalid Generic Service command/" |
| "response code (0x%04hx)\n", |
| rjt->cmd_rsp_code); |
| return 1; |
| } |
| |
| ZFCP_LOG_INFO("Generic Service command rejected\n"); |
| ZFCP_LOG_INFO("%s (0x%02x, 0x%02x, 0x%02x)\n", |
| zfcp_rc_description(rjt->reason_code, zfcp_ct_rc), |
| (u32) rjt->reason_code, (u32) rjt->reason_code_expl, |
| (u32) rjt->vendor_unique); |
| |
| return 1; |
| } |
| |
| /** |
| * zfcp_print_els_rjt - print reject parameter and description for ELS reject |
| * @rjt_par: reject parameter acc. to FC-PH/FC-FS |
| * @rc_table: table of reason codes and descriptions |
| */ |
| static inline void |
| zfcp_print_els_rjt(struct zfcp_ls_rjt_par *rjt_par, |
| const struct zfcp_rc_entry *rc_table) |
| { |
| ZFCP_LOG_INFO("%s (%02x %02x %02x %02x)\n", |
| zfcp_rc_description(rjt_par->reason_code, rc_table), |
| (u32) rjt_par->action, (u32) rjt_par->reason_code, |
| (u32) rjt_par->reason_expl, (u32) rjt_par->vendor_unique); |
| } |
| |
| /** |
| * zfcp_fsf_handle_els_rjt - evaluate status qualifier/reason code on ELS reject |
| * @sq: status qualifier word |
| * @rjt_par: reject parameter as described in FC-PH and FC-FS |
| * Return: -EROMTEIO for LS_RJT, -EREMCHG for invalid D_ID, -EIO else |
| */ |
| int |
| zfcp_handle_els_rjt(u32 sq, struct zfcp_ls_rjt_par *rjt_par) |
| { |
| int ret = -EIO; |
| |
| if (sq == FSF_IOSTAT_NPORT_RJT) { |
| ZFCP_LOG_INFO("ELS rejected (P_RJT)\n"); |
| zfcp_print_els_rjt(rjt_par, zfcp_p_rjt_rc); |
| /* invalid d_id */ |
| if (rjt_par->reason_code == 0x01) |
| ret = -EREMCHG; |
| } else if (sq == FSF_IOSTAT_FABRIC_RJT) { |
| ZFCP_LOG_INFO("ELS rejected (F_RJT)\n"); |
| zfcp_print_els_rjt(rjt_par, zfcp_p_rjt_rc); |
| /* invalid d_id */ |
| if (rjt_par->reason_code == 0x01) |
| ret = -EREMCHG; |
| } else if (sq == FSF_IOSTAT_LS_RJT) { |
| ZFCP_LOG_INFO("ELS rejected (LS_RJT)\n"); |
| zfcp_print_els_rjt(rjt_par, zfcp_ls_rjt_rc); |
| ret = -EREMOTEIO; |
| } else |
| ZFCP_LOG_INFO("unexpected SQ: 0x%02x\n", sq); |
| |
| return ret; |
| } |
| |
| #undef ZFCP_LOG_AREA |