SCST sysfs interface
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From: Vladislav Bolkhovitin on 13 Apr 2010 09:10 This patch contains file scst_sysfs.c. Signed-off-by: Daniel Henrique Debonzi <debonzi(a)linux.vnet.ibm.com> Signed-off-by: Vladislav Bolkhovitin <vst(a)vlnb.net> --- scst_sysfs.c | 3884 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 3884 insertions(+) diff -uprN orig/linux-2.6.33/drivers/scst/scst_sysfs.c linux-2.6.33/drivers/scst/scst_sysfs.c --- orig/linux-2.6.33/drivers/scst/scst_sysfs.c +++ linux-2.6.33/drivers/scst/scst_sysfs.c @@ -0,0 +1,3884 @@ +/* + * scst_sysfs.c + * + * Copyright (C) 2009 Daniel Henrique Debonzi <debonzi(a)linux.vnet.ibm.com> + * Copyright (C) 2009 - 2010 Vladislav Bolkhovitin <vst(a)vlnb.net> + * Copyright (C) 2009 - 2010 ID7 Ltd. + * + * 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, version 2 + * of the License. + * + * 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/kobject.h> +#include <linux/string.h> +#include <linux/sysfs.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/ctype.h> + +#include "scst.h" +#include "scst_priv.h" +#include "scst_mem.h" + +static DECLARE_COMPLETION(scst_sysfs_root_release_completion); + +static struct kobject scst_sysfs_root_kobj; +static struct kobject *scst_targets_kobj; +static struct kobject *scst_devices_kobj; +static struct kobject *scst_sgv_kobj; +static struct kobject *scst_handlers_kobj; + +/* Regular SCST sysfs operations */ +struct sysfs_ops scst_sysfs_ops; +EXPORT_SYMBOL_GPL(scst_sysfs_ops); + +static const char *scst_dev_handler_types[] = { + "Direct-access device (e.g., magnetic disk)", + "Sequential-access device (e.g., magnetic tape)", + "Printer device", + "Processor device", + "Write-once device (e.g., some optical disks)", + "CD-ROM device", + "Scanner device (obsolete)", + "Optical memory device (e.g., some optical disks)", + "Medium changer device (e.g., jukeboxes)", + "Communications device (obsolete)", + "Defined by ASC IT8 (Graphic arts pre-press devices)", + "Defined by ASC IT8 (Graphic arts pre-press devices)", + "Storage array controller device (e.g., RAID)", + "Enclosure services device", + "Simplified direct-access device (e.g., magnetic disk)", + "Optical card reader/writer device" +}; + +#if defined(CONFIG_SCST_DEBUG) || defined(CONFIG_SCST_TRACING) + +static DEFINE_MUTEX(scst_log_mutex); + +static struct scst_trace_log scst_trace_tbl[] = { + { TRACE_OUT_OF_MEM, "out_of_mem" }, + { TRACE_MINOR, "minor" }, + { TRACE_SG_OP, "sg" }, + { TRACE_MEMORY, "mem" }, + { TRACE_BUFF, "buff" }, + { TRACE_PID, "pid" }, + { TRACE_LINE, "line" }, + { TRACE_FUNCTION, "function" }, + { TRACE_DEBUG, "debug" }, + { TRACE_SPECIAL, "special" }, + { TRACE_SCSI, "scsi" }, + { TRACE_MGMT, "mgmt" }, + { TRACE_MGMT_DEBUG, "mgmt_dbg" }, + { TRACE_FLOW_CONTROL, "flow_control" }, + { 0, NULL } +}; + +static struct scst_trace_log scst_local_trace_tbl[] = { + { TRACE_RTRY, "retry" }, + { TRACE_SCSI_SERIALIZING, "scsi_serializing" }, + { TRACE_RCV_BOT, "recv_bot" }, + { TRACE_SND_BOT, "send_bot" }, + { TRACE_RCV_TOP, "recv_top" }, + { TRACE_SND_TOP, "send_top" }, + { 0, NULL } +}; + +static ssize_t scst_trace_level_show(const struct scst_trace_log *local_tbl, + unsigned long log_level, char *buf, const char *help); +static int scst_write_trace(const char *buf, size_t length, + unsigned long *log_level, unsigned long default_level, + const char *name, const struct scst_trace_log *tbl); + +#endif /* defined(CONFIG_SCST_DEBUG) || defined(CONFIG_SCST_TRACING) */ + +static ssize_t scst_luns_mgmt_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *buf); +static ssize_t scst_luns_mgmt_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count); +static ssize_t scst_tgt_addr_method_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *buf); +static ssize_t scst_tgt_addr_method_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count); +static ssize_t scst_tgt_io_grouping_type_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *buf); +static ssize_t scst_tgt_io_grouping_type_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count); +static ssize_t scst_ini_group_mgmt_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *buf); +static ssize_t scst_ini_group_mgmt_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count); +static ssize_t scst_rel_tgt_id_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *buf); +static ssize_t scst_rel_tgt_id_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count); +static ssize_t scst_acg_luns_mgmt_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count); +static ssize_t scst_acg_ini_mgmt_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *buf); +static ssize_t scst_acg_ini_mgmt_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count); +static ssize_t scst_acg_addr_method_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *buf); +static ssize_t scst_acg_addr_method_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count); +static ssize_t scst_acg_io_grouping_type_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *buf); +static ssize_t scst_acg_io_grouping_type_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count); +static ssize_t scst_acn_file_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf); + +static void scst_sysfs_release(struct kobject *kobj) +{ + kfree(kobj); +} + +/* + * Target Template + */ + +static void scst_tgtt_release(struct kobject *kobj) +{ + struct scst_tgt_template *tgtt; + + tgtt = container_of(kobj, struct scst_tgt_template, tgtt_kobj); + + complete_all(&tgtt->tgtt_kobj_release_cmpl); + + scst_tgtt_cleanup(tgtt); + return; +} + +static struct kobj_type tgtt_ktype = { + .sysfs_ops = &scst_sysfs_ops, + .release = scst_tgtt_release, +}; + +#if defined(CONFIG_SCST_DEBUG) || defined(CONFIG_SCST_TRACING) + +static ssize_t scst_tgtt_trace_level_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct scst_tgt_template *tgtt; + + tgtt = container_of(kobj, struct scst_tgt_template, tgtt_kobj); + + return scst_trace_level_show(tgtt->trace_tbl, + tgtt->trace_flags ? *tgtt->trace_flags : 0, buf, + tgtt->trace_tbl_help); +} + +static ssize_t scst_tgtt_trace_level_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + int res; + struct scst_tgt_template *tgtt; + + tgtt = container_of(kobj, struct scst_tgt_template, tgtt_kobj); + + if (mutex_lock_interruptible(&scst_log_mutex) != 0) { + res = -EINTR; + goto out; + } + + res = scst_write_trace(buf, count, tgtt->trace_flags, + tgtt->default_trace_flags, tgtt->name, tgtt->trace_tbl); + + mutex_unlock(&scst_log_mutex); + +out: + return res; +} + +static struct kobj_attribute tgtt_trace_attr = + __ATTR(trace_level, S_IRUGO | S_IWUSR, + scst_tgtt_trace_level_show, scst_tgtt_trace_level_store); + +#endif /* #if defined(CONFIG_SCST_DEBUG) || defined(CONFIG_SCST_TRACING) */ + +static ssize_t scst_tgtt_mgmt_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + char *help = "Usage: echo \"add_target target_name [parameters]\" " + ">mgmt\n" + " echo \"del_target target_name\" >mgmt\n" + "%s" + "\n" + "where parameters are one or more " + "param_name=value pairs separated by ';'\n" + "%s%s"; + struct scst_tgt_template *tgtt; + + tgtt = container_of(kobj, struct scst_tgt_template, tgtt_kobj); + + if (tgtt->add_target_parameters_help != NULL) + return sprintf(buf, help, + (tgtt->mgmt_cmd_help) ? tgtt->mgmt_cmd_help : "", + "\nThe following parameters available: ", + tgtt->add_target_parameters_help); + else + return sprintf(buf, help, + (tgtt->mgmt_cmd_help) ? tgtt->mgmt_cmd_help : "", + "", ""); +} + +static ssize_t scst_tgtt_mgmt_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count) +{ + int res; + char *buffer, *p, *pp, *target_name; + struct scst_tgt_template *tgtt; + + tgtt = container_of(kobj, struct scst_tgt_template, tgtt_kobj); + + buffer = kzalloc(count+1, GFP_KERNEL); + if (buffer == NULL) { + res = -ENOMEM; + goto out; + } + + memcpy(buffer, buf, count); + buffer[count] = '\0'; + + pp = buffer; + if (pp[strlen(pp) - 1] == '\n') + pp[strlen(pp) - 1] = '\0'; + + p = scst_get_next_lexem(&pp); + + if (strcasecmp("add_target", p) == 0) { + target_name = scst_get_next_lexem(&pp); + if (*target_name == '\0') { + PRINT_ERROR("%s", "Target name required"); + res = -EINVAL; + goto out_free; + } + res = tgtt->add_target(target_name, pp); + } else if (strcasecmp("del_target", p) == 0) { + target_name = scst_get_next_lexem(&pp); + if (*target_name == '\0') { + PRINT_ERROR("%s", "Target name required"); + res = -EINVAL; + goto out_free; + } + + p = scst_get_next_lexem(&pp); + if (*p != '\0') + goto out_syntax_err; + + res = tgtt->del_target(target_name); + } else if (tgtt->mgmt_cmd != NULL) { + scst_restore_token_str(p, pp); + res = tgtt->mgmt_cmd(buffer); + } else { + PRINT_ERROR("Unknown action \"%s\"", p); + res = -EINVAL; + goto out_free; + } + + if (res == 0) + res = count; + +out_free: + kfree(buffer); + +out: + return res; + +out_syntax_err: + PRINT_ERROR("Syntax error on \"%s\"", p); + res = -EINVAL; + goto out_free; +} + +static struct kobj_attribute scst_tgtt_mgmt = + __ATTR(mgmt, S_IRUGO | S_IWUSR, scst_tgtt_mgmt_show, + scst_tgtt_mgmt_store); + +int scst_create_tgtt_sysfs(struct scst_tgt_template *tgtt) +{ + int retval = 0; + const struct attribute **pattr; + + init_completion(&tgtt->tgtt_kobj_release_cmpl); + + tgtt->tgtt_kobj_initialized = 1; + + retval = kobject_init_and_add(&tgtt->tgtt_kobj, &tgtt_ktype, + scst_targets_kobj, tgtt->name); + if (retval != 0) { + PRINT_ERROR("Can't add tgtt %s to sysfs", tgtt->name); + goto out; + } + + /* + * In case of errors there's no need for additional cleanup, because + * it will be done by the _put function() called by the caller. + */ + + if (tgtt->add_target != NULL) { + retval = sysfs_create_file(&tgtt->tgtt_kobj, + &scst_tgtt_mgmt.attr); + if (retval != 0) { + PRINT_ERROR("Can't add mgmt attr for target driver %s", + tgtt->name); + goto out; + } + } + + pattr = tgtt->tgtt_attrs; + if (pattr != NULL) { + while (*pattr != NULL) { + TRACE_DBG("Creating attr %s for target driver %s", + (*pattr)->name, tgtt->name); + retval = sysfs_create_file(&tgtt->tgtt_kobj, *pattr); + if (retval != 0) { + PRINT_ERROR("Can't add attr %s for target " + "driver %s", (*pattr)->name, + tgtt->name); + goto out; + } + pattr++; + } + } + +#if defined(CONFIG_SCST_DEBUG) || defined(CONFIG_SCST_TRACING) + if (tgtt->trace_flags != NULL) { + retval = sysfs_create_file(&tgtt->tgtt_kobj, + &tgtt_trace_attr.attr); + if (retval != 0) { + PRINT_ERROR("Can't add trace_flag for target " + "driver %s", tgtt->name); + goto out; + } + } +#endif + +out: + return retval; +} + +void scst_tgtt_sysfs_put(struct scst_tgt_template *tgtt) +{ + + if (tgtt->tgtt_kobj_initialized) { + int rc; + + kobject_del(&tgtt->tgtt_kobj); + kobject_put(&tgtt->tgtt_kobj); + + rc = wait_for_completion_timeout(&tgtt->tgtt_kobj_release_cmpl, HZ); + if (rc == 0) { + PRINT_INFO("Waiting for releasing sysfs entry " + "for target template %s...", tgtt->name); + wait_for_completion(&tgtt->tgtt_kobj_release_cmpl); + PRINT_INFO("Done waiting for releasing sysfs " + "entry for target template %s", tgtt->name); + } + } else + scst_tgtt_cleanup(tgtt); + return; +} + +/* + * Target directory implementation + */ + +static void scst_tgt_release(struct kobject *kobj) +{ + struct scst_tgt *tgt; + + tgt = container_of(kobj, struct scst_tgt, tgt_kobj); + + /* Let's make lockdep happy */ + up_write(&tgt->tgt_attr_rwsem); + + scst_free_tgt(tgt); + return; +} + +static ssize_t scst_tgt_attr_show(struct kobject *kobj, struct attribute *attr, + char *buf) +{ + int res; + struct kobj_attribute *kobj_attr; + struct scst_tgt *tgt; + + tgt = container_of(kobj, struct scst_tgt, tgt_kobj); + + if (down_read_trylock(&tgt->tgt_attr_rwsem) == 0) { + res = -ENOENT; + goto out; + } + + kobj_attr = container_of(attr, struct kobj_attribute, attr); + + res = kobj_attr->show(kobj, kobj_attr, buf); + + up_read(&tgt->tgt_attr_rwsem); + +out: + return res; +} + +static ssize_t scst_tgt_attr_store(struct kobject *kobj, + struct attribute *attr, const char *buf, size_t count) +{ + int res; + struct kobj_attribute *kobj_attr; + struct scst_tgt *tgt; + + tgt = container_of(kobj, struct scst_tgt, tgt_kobj); + + if (down_read_trylock(&tgt->tgt_attr_rwsem) == 0) { + res = -ENOENT; + goto out; + } + + kobj_attr = container_of(attr, struct kobj_attribute, attr); + + res = kobj_attr->store(kobj, kobj_attr, buf, count); + + up_read(&tgt->tgt_attr_rwsem); + +out: + return res; +} + +static struct sysfs_ops scst_tgt_sysfs_ops = { + .show = scst_tgt_attr_show, + .store = scst_tgt_attr_store, +}; + +static struct kobj_type tgt_ktype = { + .sysfs_ops = &scst_tgt_sysfs_ops, + .release = scst_tgt_release, +}; + +static void scst_acg_release(struct kobject *kobj) +{ + struct scst_acg *acg; + + acg = container_of(kobj, struct scst_acg, acg_kobj); + + scst_destroy_acg(acg); + return; +} + +static struct kobj_type acg_ktype = { + .sysfs_ops = &scst_sysfs_ops, + .release = scst_acg_release, +}; + +static struct kobj_attribute scst_luns_mgmt = + __ATTR(mgmt, S_IRUGO | S_IWUSR, scst_luns_mgmt_show, + scst_luns_mgmt_store); + +static struct kobj_attribute scst_acg_luns_mgmt = + __ATTR(mgmt, S_IRUGO | S_IWUSR, scst_luns_mgmt_show, + scst_acg_luns_mgmt_store); + +static struct kobj_attribute scst_acg_ini_mgmt = + __ATTR(mgmt, S_IRUGO | S_IWUSR, scst_acg_ini_mgmt_show, + scst_acg_ini_mgmt_store); + +static struct kobj_attribute scst_ini_group_mgmt = + __ATTR(mgmt, S_IRUGO | S_IWUSR, scst_ini_group_mgmt_show, + scst_ini_group_mgmt_store); + +static struct kobj_attribute scst_tgt_addr_method = + __ATTR(addr_method, S_IRUGO | S_IWUSR, scst_tgt_addr_method_show, + scst_tgt_addr_method_store); + +static struct kobj_attribute scst_tgt_io_grouping_type = + __ATTR(io_grouping_type, S_IRUGO | S_IWUSR, + scst_tgt_io_grouping_type_show, + scst_tgt_io_grouping_type_store); + +static struct kobj_attribute scst_rel_tgt_id = + __ATTR(rel_tgt_id, S_IRUGO | S_IWUSR, scst_rel_tgt_id_show, + scst_rel_tgt_id_store); + +static struct kobj_attribute scst_acg_addr_method = + __ATTR(addr_method, S_IRUGO | S_IWUSR, scst_acg_addr_method_show, + scst_acg_addr_method_store); + +static struct kobj_attribute scst_acg_io_grouping_type = + __ATTR(io_grouping_type, S_IRUGO | S_IWUSR, + scst_acg_io_grouping_type_show, + scst_acg_io_grouping_type_store); + +static ssize_t scst_tgt_enable_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct scst_tgt *tgt; + int res; + bool enabled; + + tgt = container_of(kobj, struct scst_tgt, tgt_kobj); + + enabled = tgt->tgtt->is_target_enabled(tgt); + + res = sprintf(buf, "%d\n", enabled ? 1 : 0); + return res; +} + +static ssize_t scst_tgt_enable_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + int res; + struct scst_tgt *tgt; + bool enable; + + if (buf == NULL) { + PRINT_ERROR("%s: NULL buffer?", __func__); + res = -EINVAL; + goto out; + } + + tgt = container_of(kobj, struct scst_tgt, tgt_kobj); + + switch (buf[0]) { + case '0': + enable = false; + break; + case '1': + if (tgt->rel_tgt_id == 0) { + res = gen_relative_target_port_id(&tgt->rel_tgt_id); + if (res) + goto out; + PRINT_INFO("Using autogenerated rel ID %d for target " + "%s", tgt->rel_tgt_id, tgt->tgt_name); + } else { + if (!scst_is_relative_target_port_id_unique( + tgt->rel_tgt_id, tgt)) { + PRINT_ERROR("Relative port id %d is not unique", + tgt->rel_tgt_id); + res = -EBADSLT; + goto out; + } + } + enable = true; + break; + default: + PRINT_ERROR("%s: Requested action not understood: %s", + __func__, buf); + res = -EINVAL; + goto out; + } + + res = tgt->tgtt->enable_target(tgt, enable); + if (res == 0) + res = count; + +out: + return res; +} + +static struct kobj_attribute tgt_enable_attr = + __ATTR(enabled, S_IRUGO | S_IWUSR, + scst_tgt_enable_show, scst_tgt_enable_store); + +int scst_create_tgt_sysfs(struct scst_tgt *tgt) +{ + int retval; + const struct attribute **pattr; + + init_rwsem(&tgt->tgt_attr_rwsem); + + tgt->tgt_kobj_initialized = 1; + + retval = kobject_init_and_add(&tgt->tgt_kobj, &tgt_ktype, + &tgt->tgtt->tgtt_kobj, tgt->tgt_name); + if (retval != 0) { + PRINT_ERROR("Can't add tgt %s to sysfs", tgt->tgt_name); + goto out; + } + + /* + * In case of errors there's no need for additional cleanup, because + * it will be done by the _put function() called by the caller. + */ + + if ((tgt->tgtt->enable_target != NULL) && + (tgt->tgtt->is_target_enabled != NULL)) { + retval = sysfs_create_file(&tgt->tgt_kobj, + &tgt_enable_attr.attr); + if (retval != 0) { + PRINT_ERROR("Can't add attr %s to sysfs", + tgt_enable_attr.attr.name); + goto out; + } + } + + tgt->tgt_sess_kobj = kobject_create_and_add("sessions", &tgt->tgt_kobj); + if (tgt->tgt_sess_kobj == NULL) { + PRINT_ERROR("Can't create sess kobj for tgt %s", tgt->tgt_name); + goto out_nomem; + } + + tgt->tgt_luns_kobj = kobject_create_and_add("luns", &tgt->tgt_kobj); + if (tgt->tgt_luns_kobj == NULL) { + PRINT_ERROR("Can't create luns kobj for tgt %s", tgt->tgt_name); + goto out_nomem; + } + + retval = sysfs_create_file(tgt->tgt_luns_kobj, &scst_luns_mgmt.attr); + if (retval != 0) { + PRINT_ERROR("Can't add tgt attr %s for tgt %s", + scst_luns_mgmt.attr.name, tgt->tgt_name); + goto out; + } + + tgt->tgt_ini_grp_kobj = kobject_create_and_add("ini_groups", + &tgt->tgt_kobj); + if (tgt->tgt_ini_grp_kobj == NULL) { + PRINT_ERROR("Can't create ini_grp kobj for tgt %s", + tgt->tgt_name); + goto out_nomem; + } + + retval = sysfs_create_file(tgt->tgt_ini_grp_kobj, + &scst_ini_group_mgmt.attr); + if (retval != 0) { + PRINT_ERROR("Can't add tgt attr %s for tgt %s", + scst_ini_group_mgmt.attr.name, tgt->tgt_name); + goto out; + } + + retval = sysfs_create_file(&tgt->tgt_kobj, + &scst_rel_tgt_id.attr); + if (retval != 0) { + PRINT_ERROR("Can't add attribute %s for tgt %s", + scst_rel_tgt_id.attr.name, tgt->tgt_name); + goto out; + } + + retval = sysfs_create_file(&tgt->tgt_kobj, + &scst_tgt_addr_method.attr); + if (retval != 0) { + PRINT_ERROR("Can't add attribute %s for tgt %s", + scst_tgt_addr_method.attr.name, tgt->tgt_name); + goto out; + } + + retval = sysfs_create_file(&tgt->tgt_kobj, + &scst_tgt_io_grouping_type.attr); + if (retval != 0) { + PRINT_ERROR("Can't add attribute %s for tgt %s", + scst_tgt_io_grouping_type.attr.name, tgt->tgt_name); + goto out; + } + + pattr = tgt->tgtt->tgt_attrs; + if (pattr != NULL) { + while (*pattr != NULL) { + TRACE_DBG("Creating attr %s for tgt %s", (*pattr)->name, + tgt->tgt_name); + retval = sysfs_create_file(&tgt->tgt_kobj, *pattr); + if (retval != 0) { + PRINT_ERROR("Can't add tgt attr %s for tgt %s", + (*pattr)->name, tgt->tgt_name); + goto out; + } + pattr++; + } + } + +out: + return retval; + +out_nomem: + retval = -ENOMEM; + goto out; +} + +/* + * Must not be called under scst_mutex or there can be a deadlock with + * tgt_attr_rwsem + */ +void scst_tgt_sysfs_prepare_put(struct scst_tgt *tgt) +{ + if (tgt->tgt_kobj_initialized) { + down_write(&tgt->tgt_attr_rwsem); + tgt->tgt_kobj_put_prepared = 1; + } + + return; +} + +/* + * Must not be called under scst_mutex or there can be a deadlock with + * tgt_attr_rwsem + */ +void scst_tgt_sysfs_put(struct scst_tgt *tgt) +{ + if (tgt->tgt_kobj_initialized) { + kobject_del(tgt->tgt_sess_kobj); + kobject_put(tgt->tgt_sess_kobj); + + kobject_del(tgt->tgt_luns_kobj); + kobject_put(tgt->tgt_luns_kobj); + + kobject_del(tgt->tgt_ini_grp_kobj); + kobject_put(tgt->tgt_ini_grp_kobj); + + kobject_del(&tgt->tgt_kobj); + + if (!tgt->tgt_kobj_put_prepared) + down_write(&tgt->tgt_attr_rwsem); + kobject_put(&tgt->tgt_kobj); + } else + scst_free_tgt(tgt); + return; +} + +/* + * Devices directory implementation + */ + +ssize_t scst_device_sysfs_type_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + int pos = 0; + + struct scst_device *dev; + + dev = container_of(kobj, struct scst_device, dev_kobj); + + pos = sprintf(buf, "%d - %s\n", dev->type, + (unsigned)dev->type > ARRAY_SIZE(scst_dev_handler_types) ? + "unknown" : scst_dev_handler_types[dev->type]); + + return pos; +} + +static struct kobj_attribute device_type_attr = + __ATTR(type, S_IRUGO, scst_device_sysfs_type_show, NULL); + +static ssize_t scst_device_sysfs_threads_num_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + int pos = 0; + struct scst_device *dev; + + dev = container_of(kobj, struct scst_device, dev_kobj); + + pos = sprintf(buf, "%d\n%s", dev->threads_num, + (dev->threads_num != dev->handler->threads_num) ? + SCST_SYSFS_KEY_MARK "\n" : ""); + return pos; +} + +static ssize_t scst_device_sysfs_threads_data_store(struct scst_device *dev, + int threads_num, enum scst_dev_type_threads_pool_type threads_pool_type) +{ + int res = 0; + + if (dev->threads_num < 0) { + PRINT_ERROR("Threads pool disabled for device %s", + dev->virt_name); + res = -EPERM; + goto out; + } + + if ((threads_num == dev->threads_num) && + (threads_pool_type == dev->threads_pool_type)) + goto out; + + res = scst_suspend_activity(true); + if (res != 0) + goto out; + + if (mutex_lock_interruptible(&scst_mutex) != 0) { + res = -EINTR; + goto out_resume; + } + + scst_stop_dev_threads(dev); + + dev->threads_num = threads_num; + dev->threads_pool_type = threads_pool_type; + + res = scst_create_dev_threads(dev); + if (res != 0) + goto out_up; + +out_up: + mutex_unlock(&scst_mutex); + +out_resume: + scst_resume_activity(); + +out: + return res; +} + +static ssize_t scst_device_sysfs_threads_num_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + int res; + struct scst_device *dev; + long newtn; + + dev = container_of(kobj, struct scst_device, dev_kobj); + + res = strict_strtoul(buf, 0, &newtn); + if (res != 0) { + PRINT_ERROR("strict_strtoul() for %s failed: %d ", buf, res); + goto out; + } + + if (newtn < 0) { + PRINT_ERROR("Illegal threads num value %ld", newtn); + res = -EINVAL; + goto out; + } + + res = scst_device_sysfs_threads_data_store(dev, newtn, + dev->threads_pool_type); + if (res != 0) + goto out; + + PRINT_INFO("Changed cmd threads num to %ld", newtn); + + res = count; + +out: + return res; +} + +static struct kobj_attribute device_threads_num_attr = + __ATTR(threads_num, S_IRUGO | S_IWUSR, + scst_device_sysfs_threads_num_show, + scst_device_sysfs_threads_num_store); + +static ssize_t scst_device_sysfs_threads_pool_type_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + int pos = 0; + struct scst_device *dev; + + dev = container_of(kobj, struct scst_device, dev_kobj); + + if (dev->threads_num == 0) { + pos = sprintf(buf, "Async\n"); + goto out; + } else if (dev->threads_num < 0) { + pos = sprintf(buf, "Not valid\n"); + goto out; + } + + switch (dev->threads_pool_type) { + case SCST_THREADS_POOL_PER_INITIATOR: + pos = sprintf(buf, "%s\n%s", SCST_THREADS_POOL_PER_INITIATOR_STR, + (dev->threads_pool_type != dev->handler->threads_pool_type) ? + SCST_SYSFS_KEY_MARK "\n" : ""); + break; + case SCST_THREADS_POOL_SHARED: + pos = sprintf(buf, "%s\n%s", SCST_THREADS_POOL_SHARED_STR, + (dev->threads_pool_type != dev->handler->threads_pool_type) ? + SCST_SYSFS_KEY_MARK "\n" : ""); + break; + default: + pos = sprintf(buf, "Unknown\n"); + break; + } + +out: + return pos; +} + +static ssize_t scst_device_sysfs_threads_pool_type_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + int res; + struct scst_device *dev; + enum scst_dev_type_threads_pool_type newtpt; + + dev = container_of(kobj, struct scst_device, dev_kobj); + + newtpt = scst_parse_threads_pool_type(buf, count); + if (newtpt == SCST_THREADS_POOL_TYPE_INVALID) { + PRINT_ERROR("Illegal threads pool type %s", buf); + res = -EINVAL; + goto out; + } + + TRACE_DBG("buf %s, count %zd, newtpt %d", buf, count, newtpt); + + res = scst_device_sysfs_threads_data_store(dev, dev->threads_num, + newtpt); + if (res != 0) + goto out; + + PRINT_INFO("Changed cmd threads pool type to %d", newtpt); + + res = count; + +out: + return res; +} + +static struct kobj_attribute device_threads_pool_type_attr = + __ATTR(threads_pool_type, S_IRUGO | S_IWUSR, + scst_device_sysfs_threads_pool_type_show, + scst_device_sysfs_threads_pool_type_store); + +static struct attribute *scst_device_attrs[] = { + &device_type_attr.attr, + &device_threads_num_attr.attr, + &device_threads_pool_type_attr.attr, + NULL, +}; + +static void scst_sysfs_device_release(struct kobject *kobj) +{ + struct scst_device *dev; + + dev = container_of(kobj, struct scst_device, dev_kobj); + + /* Let's make lockdep happy */ + up_write(&dev->dev_attr_rwsem); + + scst_free_device(dev); + return; +} + +int scst_create_devt_dev_sysfs(struct scst_device *dev) +{ + int retval = 0; + const struct attribute **pattr; + + if (dev->handler == &scst_null_devtype) + goto out; + + BUG_ON(!dev->handler->devt_kobj_initialized); + + /* + * In case of errors there's no need for additional cleanup, because + * it will be done by the _put function() called by the caller. + */ + + retval = sysfs_create_link(&dev->dev_kobj, + &dev->handler->devt_kobj, "handler"); + if (retval != 0) { + PRINT_ERROR("Can't create handler link for dev %s", + dev->virt_name); + goto out; + } + + retval = sysfs_create_link(&dev->handler->devt_kobj, + &dev->dev_kobj, dev->virt_name); + if (retval != 0) { + PRINT_ERROR("Can't create handler link for dev %s", + dev->virt_name); + goto out; + } + + pattr = dev->handler->dev_attrs; + if (pattr != NULL) { + while (*pattr != NULL) { + retval = sysfs_create_file(&dev->dev_kobj, *pattr); + if (retval != 0) { + PRINT_ERROR("Can't add dev attr %s for dev %s", + (*pattr)->name, dev->virt_name); + goto out; + } + pattr++; + } + } + +out: + return retval; +} + +void scst_devt_dev_sysfs_put(struct scst_device *dev) +{ + const struct attribute **pattr; + + if (dev->handler == &scst_null_devtype) + goto out; + + BUG_ON(!dev->handler->devt_kobj_initialized); + + pattr = dev->handler->dev_attrs; + if (pattr != NULL) { + while (*pattr != NULL) { + sysfs_remove_file(&dev->dev_kobj, *pattr); + pattr++; + } + } + + sysfs_remove_link(&dev->dev_kobj, "handler"); + sysfs_remove_link(&dev->handler->devt_kobj, dev->virt_name); + +out: + return; +} + +static ssize_t scst_dev_attr_show(struct kobject *kobj, struct attribute *attr, + char *buf) +{ + int res; + struct kobj_attribute *kobj_attr; + struct scst_device *dev; + + dev = container_of(kobj, struct scst_device, dev_kobj); + + if (down_read_trylock(&dev->dev_attr_rwsem) == 0) { + res = -ENOENT; + goto out; + } + + kobj_attr = container_of(attr, struct kobj_attribute, attr); + + res = kobj_attr->show(kobj, kobj_attr, buf); + + up_read(&dev->dev_attr_rwsem); + +out: + return res; +} + +static ssize_t scst_dev_attr_store(struct kobject *kobj, struct attribute *attr, + const char *buf, size_t count) +{ + int res; + struct kobj_attribute *kobj_attr; + struct scst_device *dev; + + dev = container_of(kobj, struct scst_device, dev_kobj); + + if (down_read_trylock(&dev->dev_attr_rwsem) == 0) { + res = -ENOENT; + goto out; + } + + kobj_attr = container_of(attr, struct kobj_attribute, attr); + + res = kobj_attr->store(kobj, kobj_attr, buf, count); + + up_read(&dev->dev_attr_rwsem); + +out: + return res; +} + +static struct sysfs_ops scst_dev_sysfs_ops = { + .show = scst_dev_attr_show, + .store = scst_dev_attr_store, +}; + +static struct kobj_type scst_device_ktype = { + .sysfs_ops = &scst_dev_sysfs_ops, + .release = scst_sysfs_device_release, + .default_attrs = scst_device_attrs, +}; + +int scst_create_device_sysfs(struct scst_device *dev) +{ + int retval = 0; + + init_rwsem(&dev->dev_attr_rwsem); + + dev->dev_kobj_initialized = 1; + + retval = kobject_init_and_add(&dev->dev_kobj, &scst_device_ktype, + scst_devices_kobj, dev->virt_name); + if (retval != 0) { + PRINT_ERROR("Can't add device %s to sysfs", dev->virt_name); + goto out; + } + + /* + * In case of errors there's no need for additional cleanup, because + * it will be done by the _put function() called by the caller. + */ + + dev->dev_exp_kobj = kobject_create_and_add("exported", + &dev->dev_kobj); + if (dev->dev_exp_kobj == NULL) { + PRINT_ERROR("Can't create exported link for device %s", + dev->virt_name); + retval = -ENOMEM; + goto out; + } + + if (dev->scsi_dev != NULL) { + retval = sysfs_create_link(&dev->dev_kobj, + &dev->scsi_dev->sdev_dev.kobj, "scsi_device"); + if (retval != 0) { + PRINT_ERROR("Can't create scsi_device link for dev %s", + dev->virt_name); + goto out; + } + } + +out: + return retval; +} + +/* + * Must not be called under scst_mutex or there can be a deadlock with + * dev_attr_rwsem + */ +void scst_device_sysfs_put(struct scst_device *dev) +{ + + if (dev->dev_kobj_initialized) { + kobject_del(dev->dev_exp_kobj); + kobject_put(dev->dev_exp_kobj); + + kobject_del(&dev->dev_kobj); + + down_write(&dev->dev_attr_rwsem); + kobject_put(&dev->dev_kobj); + } else + scst_free_device(dev); + return; +} + +/* + * Target sessions directory implementation + */ + +static ssize_t scst_sess_sysfs_commands_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct scst_session *sess; + + sess = container_of(kobj, struct scst_session, sess_kobj); + + return sprintf(buf, "%i\n", atomic_read(&sess->sess_cmd_count)); +} + +static struct kobj_attribute session_commands_attr = + __ATTR(commands, S_IRUGO, scst_sess_sysfs_commands_show, NULL); + +static ssize_t scst_sess_sysfs_active_commands_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + int res; + struct scst_session *sess; + int active_cmds = 0, t; + + if (mutex_lock_interruptible(&scst_mutex) != 0) { + res = -EINTR; + goto out; + } + + sess = container_of(kobj, struct scst_session, sess_kobj); + + for (t = TGT_DEV_HASH_SIZE-1; t >= 0; t--) { + struct list_head *sess_tgt_dev_list_head = + &sess->sess_tgt_dev_list_hash[t]; + struct scst_tgt_dev *tgt_dev; + list_for_each_entry(tgt_dev, sess_tgt_dev_list_head, + sess_tgt_dev_list_entry) { + active_cmds += atomic_read(&tgt_dev->tgt_dev_cmd_count); + } + } + + mutex_unlock(&scst_mutex); + + res = sprintf(buf, "%i\n", active_cmds); + +out: + return res; +} + +static struct kobj_attribute session_active_commands_attr = + __ATTR(active_commands, S_IRUGO, scst_sess_sysfs_active_commands_show, + NULL); + +static ssize_t scst_sess_sysfs_initiator_name_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct scst_session *sess; + + sess = container_of(kobj, struct scst_session, sess_kobj); + + return scnprintf(buf, SCST_SYSFS_BLOCK_SIZE, "%s\n", + sess->initiator_name); +} + +static struct kobj_attribute session_initiator_name_attr = + __ATTR(initiator_name, S_IRUGO, scst_sess_sysfs_initiator_name_show, NULL); + +static struct attribute *scst_session_attrs[] = { + &session_commands_attr.attr, + &session_active_commands_attr.attr, + &session_initiator_name_attr.attr, + NULL, +}; + +static void scst_sysfs_session_release(struct kobject *kobj) +{ + struct scst_session *sess; + + sess = container_of(kobj, struct scst_session, sess_kobj); + + /* Let's make lockdep happy */ + up_write(&sess->sess_attr_rwsem); + + scst_release_session(sess); + return; +} + +static ssize_t scst_sess_attr_show(struct kobject *kobj, struct attribute *attr, + char *buf) +{ + int res; + struct kobj_attribute *kobj_attr; + struct scst_session *sess; + + sess = container_of(kobj, struct scst_session, sess_kobj); + + if (down_read_trylock(&sess->sess_attr_rwsem) == 0) { + res = -ENOENT; + goto out; + } + + kobj_attr = container_of(attr, struct kobj_attribute, attr); + + res = kobj_attr->show(kobj, kobj_attr, buf); + + up_read(&sess->sess_attr_rwsem); + +out: + return res; +} + +static ssize_t scst_sess_attr_store(struct kobject *kobj, struct attribute *attr, + const char *buf, size_t count) +{ + int res; + struct kobj_attribute *kobj_attr; + struct scst_session *sess; + + sess = container_of(kobj, struct scst_session, sess_kobj); + + if (down_read_trylock(&sess->sess_attr_rwsem) == 0) { + res = -ENOENT; + goto out; + } + + kobj_attr = container_of(attr, struct kobj_attribute, attr); + + res = kobj_attr->store(kobj, kobj_attr, buf, count); + + up_read(&sess->sess_attr_rwsem); + +out: + return res; +} + +static struct sysfs_ops scst_sess_sysfs_ops = { + .show = scst_sess_attr_show, + .store = scst_sess_attr_store, +}; + +static struct kobj_type scst_session_ktype = { + .sysfs_ops = &scst_sess_sysfs_ops, + .release = scst_sysfs_session_release, + .default_attrs = scst_session_attrs, +}; + +/* scst_mutex supposed to be locked */ +int scst_create_sess_sysfs(struct scst_session *sess) +{ + int retval = 0; + struct scst_session *s; + const struct attribute **pattr; + char *name = (char *)sess->initiator_name; + int len = strlen(name) + 1, n = 1; + +restart: + list_for_each_entry(s, &sess->tgt->sess_list, sess_list_entry) { + if (!s->sess_kobj_initialized) + continue; + + if (strcmp(name, kobject_name(&s->sess_kobj)) == 0) { + if (s == sess) + continue; + + TRACE_DBG("Dublicated session from the same initiator " + "%s found", name); + + if (name == sess->initiator_name) { + len = strlen(sess->initiator_name); + len += 20; + name = kmalloc(len, GFP_KERNEL); + if (name == NULL) { + PRINT_ERROR("Unable to allocate a " + "replacement name (size %d)", + len); + } + } + + snprintf(name, len, "%s_%d", sess->initiator_name, n); + n++; + goto restart; + } + } + + init_rwsem(&sess->sess_attr_rwsem); + + sess->sess_kobj_initialized = 1; + + retval = kobject_init_and_add(&sess->sess_kobj, &scst_session_ktype, + sess->tgt->tgt_sess_kobj, name); + if (retval != 0) { + PRINT_ERROR("Can't add session %s to sysfs", name); + goto out_free; + } + + /* + * In case of errors there's no need for additional cleanup, because + * it will be done by the _put function() called by the caller. + */ + + pattr = sess->tgt->tgtt->sess_attrs; + if (pattr != NULL) { + while (*pattr != NULL) { + retval = sysfs_create_file(&sess->sess_kobj, *pattr); + if (retval != 0) { + PRINT_ERROR("Can't add sess attr %s for sess " + "for initiator %s", (*pattr)->name, + name); + goto out_free; + } + pattr++; + } + } + + if (sess->acg == sess->tgt->default_acg) + retval = sysfs_create_link(&sess->sess_kobj, + sess->tgt->tgt_luns_kobj, "luns"); + else + retval = sysfs_create_link(&sess->sess_kobj, + sess->acg->luns_kobj, "luns"); + +out_free: + if (name != sess->initiator_name) + kfree(name); + return retval; +} + +/* + * Must not be called under scst_mutex or there can be a deadlock with + * sess_attr_rwsem + */ +void scst_sess_sysfs_put(struct scst_session *sess) +{ + + if (sess->sess_kobj_initialized) { + kobject_del(&sess->sess_kobj); + + down_write(&sess->sess_attr_rwsem); + kobject_put(&sess->sess_kobj); + } else + scst_release_session(sess); + return; +} + +/* + * Target luns directory implementation + */ + +static void scst_acg_dev_release(struct kobject *kobj) +{ + struct scst_acg_dev *acg_dev; + + acg_dev = container_of(kobj, struct scst_acg_dev, acg_dev_kobj); + + scst_acg_dev_destroy(acg_dev); + return; +} + +static ssize_t scst_lun_rd_only_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *buf) +{ + struct scst_acg_dev *acg_dev; + + acg_dev = container_of(kobj, struct scst_acg_dev, acg_dev_kobj); + + if (acg_dev->rd_only || acg_dev->dev->rd_only) + return sprintf(buf, "%d\n%s\n", 1, SCST_SYSFS_KEY_MARK); + else + return sprintf(buf, "%d\n", 0); +} + +static struct kobj_attribute lun_options_attr = + __ATTR(read_only, S_IRUGO, scst_lun_rd_only_show, NULL); + +static struct attribute *lun_attrs[] = { + &lun_options_attr.attr, + NULL, +}; + +static struct kobj_type acg_dev_ktype = { + .sysfs_ops = &scst_sysfs_ops, + .release = scst_acg_dev_release, + .default_attrs = lun_attrs, +}; + +int scst_create_acg_dev_sysfs(struct scst_acg *acg, unsigned int virt_lun, + struct kobject *parent) +{ + int retval; + struct scst_acg_dev *acg_dev = NULL, *acg_dev_tmp; + char str[20]; + + list_for_each_entry(acg_dev_tmp, &acg->acg_dev_list, + acg_dev_list_entry) { + if (acg_dev_tmp->lun == virt_lun) { + acg_dev = acg_dev_tmp; + break; + } + } + if (acg_dev == NULL) { + PRINT_ERROR("%s", "acg_dev lookup for kobject creation failed"); + retval = -EINVAL; + goto out; + } + + snprintf(str, sizeof(str), "export%u", + acg_dev->dev->dev_exported_lun_num++); + + kobject_get(&acg_dev->dev->dev_kobj); + + acg_dev->acg_dev_kobj_initialized = 1; + + retval = kobject_init_and_add(&acg_dev->acg_dev_kobj, &acg_dev_ktype, + parent, "%u", virt_lun); + if (retval != 0) { + PRINT_ERROR("Can't add acg %s to sysfs", acg->acg_name); + goto out; + } + + /* + * In case of errors there's no need for additional cleanup, because + * it will be done by the _put function() called by the caller. + */ + + retval = sysfs_create_link(acg_dev->dev->dev_exp_kobj, + &acg_dev->acg_dev_kobj, str); + if (retval != 0) { + PRINT_ERROR("Can't create acg %s LUN link", acg->acg_name); + goto out; + } + + retval = sysfs_create_link(&acg_dev->acg_dev_kobj, + &acg_dev->dev->dev_kobj, "device"); + if (retval != 0) { + PRINT_ERROR("Can't create acg %s device link", acg->acg_name); + goto out; + } + +out: + return retval; +} + +static ssize_t __scst_luns_mgmt_store(struct scst_acg *acg, + struct kobject *kobj, const char *buf, size_t count) +{ + int res, virt = 0, read_only = 0, action; + char *buffer, *p, *e = NULL; + unsigned int host, channel = 0, id = 0, lun = 0, virt_lun; + struct scst_acg_dev *acg_dev = NULL, *acg_dev_tmp; + struct scst_device *d, *dev = NULL; + +#define SCST_LUN_ACTION_ADD 1 +#define SCST_LUN_ACTION_DEL 2 +#define SCST_LUN_ACTION_REPLACE 3 +#define SCST_LUN_ACTION_CLEAR 4 + + buffer = kzalloc(count+1, GFP_KERNEL); + if (buffer == NULL) { + res = -ENOMEM; + goto out; + } + + memcpy(buffer, buf, count); + buffer[count] = '\0'; + p = buffer; + + p = buffer; + if (p[strlen(p) - 1] == '\n') + p[strlen(p) - 1] = '\0'; + if (strncasecmp("add", p, 3) == 0) { + p += 3; + action = SCST_LUN_ACTION_ADD; + } else if (strncasecmp("del", p, 3) == 0) { + p += 3; + action = SCST_LUN_ACTION_DEL; + } else if (!strncasecmp("replace", p, 7)) { + p += 7; + action = SCST_LUN_ACTION_REPLACE; + } else if (!strncasecmp("clear", p, 5)) { + p += 5; + action = SCST_LUN_ACTION_CLEAR; + } else { + PRINT_ERROR("Unknown action \"%s\"", p); + res = -EINVAL; + goto out_free; + } + + res = scst_suspend_activity(true); + if (res != 0) + goto out_free; + + if (mutex_lock_interruptible(&scst_mutex) != 0) { + res = -EINTR; + goto out_free_resume; + } + + if (action != SCST_LUN_ACTION_CLEAR) { + if (!isspace(*p)) { + PRINT_ERROR("%s", "Syntax error"); + res = -EINVAL; + goto out_free_up; + } + + while (isspace(*p) && *p != '\0') + p++; + e = p; /* save p */ + host = simple_strtoul(p, &p, 0); + if (*p == ':') { + channel = simple_strtoul(p + 1, &p, 0); + id = simple_strtoul(p + 1, &p, 0); + lun = simple_strtoul(p + 1, &p, 0); + e = p; + } else { + virt++; + p = e; /* restore p */ + while (!isspace(*e) && *e != '\0') + e++; + *e = '\0'; + } + + list_for_each_entry(d, &scst_dev_list, dev_list_entry) { + if (virt) { + if (d->virt_id && !strcmp(d->virt_name, p)) { + dev = d; + TRACE_DBG("Virt device %p (%s) found", + dev, p); + break; + } + } else { + if (d->scsi_dev && + d->scsi_dev->host->host_no == host && + d->scsi_dev->channel == channel && + d->scsi_dev->id == id && + d->scsi_dev->lun == lun) { + dev = d; + TRACE_DBG("Dev %p (%d:%d:%d:%d) found", + dev, host, channel, id, lun); + break; + } + } + } + if (dev == NULL) { + if (virt) { + PRINT_ERROR("Virt device '%s' not found", p); + } else { + PRINT_ERROR("Device %d:%d:%d:%d not found", + host, channel, id, lun); + } + res = -EINVAL; + goto out_free_up; + } + } + + switch (action) { + case SCST_LUN_ACTION_ADD: + case SCST_LUN_ACTION_REPLACE: + { + bool dev_replaced = false; + + e++; + while (isspace(*e) && *e != '\0') + e++; + virt_lun = simple_strtoul(e, &e, 0); + + while (isspace(*e) && *e != '\0') + e++; + + while (1) { + char *pp; + unsigned long val; + char *param = scst_get_next_token_str(&e); + if (param == NULL) + break; + + p = scst_get_next_lexem(¶m); + if (*p == '\0') { + PRINT_ERROR("Syntax error at %s (device %s)", + param, dev->virt_name); + res = -EINVAL; + goto out_free_up; + } + + pp = scst_get_next_lexem(¶m); + if (*pp == '\0') { + PRINT_ERROR("Parameter %s value missed for device %s", + p, dev->virt_name); + res = -EINVAL; + goto out_free_up; + } + + if (scst_get_next_lexem(¶m)[0] != '\0') { + PRINT_ERROR("Too many parameter's %s values (device %s)", + p, dev->virt_name); + res = -EINVAL; + goto out_free_up; + } + + res = strict_strtoul(pp, 0, &val); + if (res != 0) { + PRINT_ERROR("strict_strtoul() for %s failed: %d " + "(device %s)", pp, res, dev->virt_name); + goto out_free_up; + } + + if (!strcasecmp("read_only", p)) { + read_only = val; + TRACE_DBG("READ ONLY %d", read_only); + } else { + PRINT_ERROR("Unknown parameter %s (device %s)", + p, dev->virt_name); + res = -EINVAL; + goto out_free_up; + } + } + + acg_dev = NULL; + list_for_each_entry(acg_dev_tmp, &acg->acg_dev_list, + acg_dev_list_entry) { + if (acg_dev_tmp->lun == virt_lun) { + acg_dev = acg_dev_tmp; + break; + } + } + + if (acg_dev != NULL) { + if (action == SCST_LUN_ACTION_ADD) { + PRINT_ERROR("virt lun %d already exists in " + "group %s", virt_lun, acg->acg_name); + res = -EEXIST; + goto out_free_up; + } else { + /* Replace */ + res = scst_acg_remove_dev(acg, acg_dev->dev, + false); + if (res != 0) + goto out_free_up; + + dev_replaced = true; + } + } + + res = scst_acg_add_dev(acg, dev, virt_lun, read_only, + !dev_replaced); + if (res != 0) + goto out_free_up; + + res = scst_create_acg_dev_sysfs(acg, virt_lun, kobj); + if (res != 0) { + PRINT_ERROR("%s", "Creation of acg_dev kobject failed"); + goto out_remove_acg_dev; + } + + if (dev_replaced) { + struct scst_tgt_dev *tgt_dev; + + list_for_each_entry(tgt_dev, &dev->dev_tgt_dev_list, + dev_tgt_dev_list_entry) { + if ((tgt_dev->acg_dev->acg == acg) && + (tgt_dev->lun == virt_lun)) { + TRACE_MGMT_DBG("INQUIRY DATA HAS CHANGED" + " on tgt_dev %p", tgt_dev); + scst_gen_aen_or_ua(tgt_dev, + SCST_LOAD_SENSE(scst_sense_inquery_data_changed)); + } + } + } + + break; + } + case SCST_LUN_ACTION_DEL: + res = scst_acg_remove_dev(acg, dev, true); + if (res != 0) + goto out_free_up; + break; + case SCST_LUN_ACTION_CLEAR: + PRINT_INFO("Removed all devices from group %s", + acg->acg_name); + list_for_each_entry_safe(acg_dev, acg_dev_tmp, + &acg->acg_dev_list, + acg_dev_list_entry) { + res = scst_acg_remove_dev(acg, acg_dev->dev, + list_is_last(&acg_dev->acg_dev_list_entry, + &acg->acg_dev_list)); + if (res) + goto out_free_up; + } + break; + } + + res = count; + +out_free_up: + mutex_unlock(&scst_mutex); + +out_free_resume: + scst_resume_activity(); + +out_free: + kfree(buffer); + +out: + return res; + +out_remove_acg_dev: + scst_acg_remove_dev(acg, dev, true); + goto out_free_up; + +#undef SCST_LUN_ACTION_ADD +#undef SCST_LUN_ACTION_DEL +#undef SCST_LUN_ACTION_REPLACE +#undef SCST_LUN_ACTION_CLEAR +} + +static ssize_t scst_luns_mgmt_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *buf) +{ + static char *help = "Usage: echo \"add|del H:C:I:L lun [parameters]\" " + ">mgmt\n" + " echo \"add|del VNAME lun [parameters]\" " + ">mgmt\n" + " echo \"replace H:C:I:L lun [parameters]\" " + ">mgmt\n" + " echo \"replace VNAME lun [parameters]\" " + ">mgmt\n" + " echo \"clear\" >mgmt\n" + "\n" + "where parameters are one or more " + "param_name=value pairs separated by ';'\n" + "\nThe following parameters available: read_only."; + + return sprintf(buf, help); +} + +static ssize_t scst_luns_mgmt_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count) +{ + int res; + struct scst_acg *acg; + struct scst_tgt *tgt; + + tgt = container_of(kobj->parent, struct scst_tgt, tgt_kobj); + acg = tgt->default_acg; + + res = __scst_luns_mgmt_store(acg, kobj, buf, count); + return res; +} + +static ssize_t __scst_acg_addr_method_show(struct scst_acg *acg, char *buf) +{ + int res; + + switch (acg->addr_method) { + case SCST_LUN_ADDR_METHOD_FLAT: + res = sprintf(buf, "FLAT\n%s\n", SCST_SYSFS_KEY_MARK); + break; + case SCST_LUN_ADDR_METHOD_PERIPHERAL: + res = sprintf(buf, "PERIPHERAL\n"); + break; + default: + res = sprintf(buf, "UNKNOWN\n"); + break; + } + + return res; +} + +static ssize_t __scst_acg_addr_method_store(struct scst_acg *acg, + const char *buf, size_t count) +{ + int res = count; + + if (strncasecmp(buf, "FLAT", min_t(int, 4, count)) == 0) + acg->addr_method = SCST_LUN_ADDR_METHOD_FLAT; + else if (strncasecmp(buf, "PERIPHERAL", min_t(int, 10, count)) == 0) + acg->addr_method = SCST_LUN_ADDR_METHOD_PERIPHERAL; + else { + PRINT_ERROR("Unknown address method %s", buf); + res = -EINVAL; + } + return res; +} + +static ssize_t scst_tgt_addr_method_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct scst_acg *acg; + struct scst_tgt *tgt; + + tgt = container_of(kobj, struct scst_tgt, tgt_kobj); + acg = tgt->default_acg; + + return __scst_acg_addr_method_show(acg, buf); +} + +static ssize_t scst_tgt_addr_method_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + int res; + struct scst_acg *acg; + struct scst_tgt *tgt; + + tgt = container_of(kobj, struct scst_tgt, tgt_kobj); + acg = tgt->default_acg; + + res = __scst_acg_addr_method_store(acg, buf, count); + return res; +} + +static ssize_t __scst_acg_io_grouping_type_show(struct scst_acg *acg, char *buf) +{ + int res; + + switch (acg->acg_io_grouping_type) { + case SCST_IO_GROUPING_AUTO: + res = sprintf(buf, "%s\n", SCST_IO_GROUPING_AUTO_STR); + break; + case SCST_IO_GROUPING_THIS_GROUP_ONLY: + res = sprintf(buf, "%s\n%s\n", + SCST_IO_GROUPING_THIS_GROUP_ONLY_STR, + SCST_SYSFS_KEY_MARK); + break; + case SCST_IO_GROUPING_NEVER: + res = sprintf(buf, "%s\n%s\n", SCST_IO_GROUPING_NEVER_STR, + SCST_SYSFS_KEY_MARK); + break; + default: + res = sprintf(buf, "%d\n%s\n", acg->acg_io_grouping_type, + SCST_SYSFS_KEY_MARK); + break; + } + + return res; +} + +static ssize_t __scst_acg_io_grouping_type_store(struct scst_acg *acg, + const char *buf, size_t count) +{ + int res = 0; + int prev = acg->acg_io_grouping_type; + struct scst_acg_dev *acg_dev; + + if (strncasecmp(buf, SCST_IO_GROUPING_AUTO_STR, + min_t(int, strlen(SCST_IO_GROUPING_AUTO_STR), count)) == 0) + acg->acg_io_grouping_type = SCST_IO_GROUPING_AUTO; + else if (strncasecmp(buf, SCST_IO_GROUPING_THIS_GROUP_ONLY_STR, + min_t(int, strlen(SCST_IO_GROUPING_THIS_GROUP_ONLY_STR), count)) == 0) + acg->acg_io_grouping_type = SCST_IO_GROUPING_THIS_GROUP_ONLY; + else if (strncasecmp(buf, SCST_IO_GROUPING_NEVER_STR, + min_t(int, strlen(SCST_IO_GROUPING_NEVER_STR), count)) == 0) + acg->acg_io_grouping_type = SCST_IO_GROUPING_NEVER; + else { + long io_grouping_type; + res = strict_strtoul(buf, 0, &io_grouping_type); + if ((res != 0) || (io_grouping_type <= 0)) { + PRINT_ERROR("Unknown or not allowed I/O grouping type " + "%s", buf); + res = -EINVAL; + goto out; + } + acg->acg_io_grouping_type = io_grouping_type; + } + + if (prev == acg->acg_io_grouping_type) + goto out; + + res = scst_suspend_activity(true); + if (res != 0) + goto out; + + if (mutex_lock_interruptible(&scst_mutex) != 0) { + res = -EINTR; + goto out_resume; + } + + list_for_each_entry(acg_dev, &acg->acg_dev_list, acg_dev_list_entry) { + int rc; + + scst_stop_dev_threads(acg_dev->dev); + + rc = scst_create_dev_threads(acg_dev->dev); + if (rc != 0) + res = rc; + } + + mutex_unlock(&scst_mutex); + +out_resume: + scst_resume_activity(); + +out: + return res; +} + +static ssize_t scst_tgt_io_grouping_type_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct scst_acg *acg; + struct scst_tgt *tgt; + + tgt = container_of(kobj, struct scst_tgt, tgt_kobj); + acg = tgt->default_acg; + + return __scst_acg_io_grouping_type_show(acg, buf); +} + +static ssize_t scst_tgt_io_grouping_type_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + int res; + struct scst_acg *acg; + struct scst_tgt *tgt; + + tgt = container_of(kobj, struct scst_tgt, tgt_kobj); + acg = tgt->default_acg; + + res = __scst_acg_io_grouping_type_store(acg, buf, count); + if (res != 0) + goto out; + + res = count; + +out: + return res; +} + +static int scst_create_acg_sysfs(struct scst_tgt *tgt, + struct scst_acg *acg) +{ + int retval = 0; + + acg->acg_kobj_initialized = 1; + + retval = kobject_init_and_add(&acg->acg_kobj, &acg_ktype, + tgt->tgt_ini_grp_kobj, acg->acg_name); + if (retval != 0) { + PRINT_ERROR("Can't add acg '%s' to sysfs", acg->acg_name); + goto out; + } + + acg->luns_kobj = kobject_create_and_add("luns", &acg->acg_kobj); + if (acg->luns_kobj == NULL) { + PRINT_ERROR("Can't create luns kobj for tgt %s", + tgt->tgt_name); + retval = -ENOMEM; + goto out; + } + + retval = sysfs_create_file(acg->luns_kobj, &scst_acg_luns_mgmt.attr); + if (retval != 0) { + PRINT_ERROR("Can't add tgt attr %s for tgt %s", + scst_acg_luns_mgmt.attr.name, tgt->tgt_name); + goto out; + } + + acg->initiators_kobj = kobject_create_and_add("initiators", + &acg->acg_kobj); + if (acg->initiators_kobj == NULL) { + PRINT_ERROR("Can't create initiators kobj for tgt %s", + tgt->tgt_name); + retval = -ENOMEM; + goto out; + } + + retval = sysfs_create_file(acg->initiators_kobj, + &scst_acg_ini_mgmt.attr); + if (retval != 0) { + PRINT_ERROR("Can't add tgt attr %s for tgt %s", + scst_acg_ini_mgmt.attr.name, tgt->tgt_name); + goto out; + } + + retval = sysfs_create_file(&acg->acg_kobj, &scst_acg_addr_method.attr); + if (retval != 0) { + PRINT_ERROR("Can't add tgt attr %s for tgt %s", + scst_acg_addr_method.attr.name, tgt->tgt_name); + goto out; + } + + retval = sysfs_create_file(&acg->acg_kobj, &scst_acg_io_grouping_type.attr); + if (retval != 0) { + PRINT_ERROR("Can't add tgt attr %s for tgt %s", + scst_acg_io_grouping_type.attr.name, tgt->tgt_name); + goto out; + } + +out: + return retval; +} + +void scst_acg_sysfs_put(struct scst_acg *acg) +{ + + if (acg->acg_kobj_initialized) { + scst_clear_acg(acg); + + kobject_del(acg->luns_kobj); + kobject_put(acg->luns_kobj); + + kobject_del(acg->initiators_kobj); + kobject_put(acg->initiators_kobj); + + kobject_del(&acg->acg_kobj); + kobject_put(&acg->acg_kobj); + } else + scst_destroy_acg(acg); + return; +} + +static ssize_t scst_acg_addr_method_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct scst_acg *acg; + + acg = container_of(kobj, struct scst_acg, acg_kobj); + + return __scst_acg_addr_method_show(acg, buf); +} + +static ssize_t scst_acg_addr_method_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + int res; + struct scst_acg *acg; + + acg = container_of(kobj, struct scst_acg, acg_kobj); + + res = __scst_acg_addr_method_store(acg, buf, count); + return res; +} + +static ssize_t scst_acg_io_grouping_type_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct scst_acg *acg; + + acg = container_of(kobj, struct scst_acg, acg_kobj); + + return __scst_acg_io_grouping_type_show(acg, buf); +} + +static ssize_t scst_acg_io_grouping_type_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + int res; + struct scst_acg *acg; + + acg = container_of(kobj, struct scst_acg, acg_kobj); + + res = __scst_acg_io_grouping_type_store(acg, buf, count); + if (res != 0) + goto out; + + res = count; + +out: + return res; +} + +static ssize_t scst_ini_group_mgmt_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + static char *help = "Usage: echo \"create GROUP_NAME\" >mgmt\n" + " echo \"del GROUP_NAME\" >mgmt\n"; + + return sprintf(buf, help); +} + +static ssize_t scst_ini_group_mgmt_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + int res, action; + int len; + char *name; + char *buffer, *p, *e = NULL; + struct scst_acg *a, *acg = NULL; + struct scst_tgt *tgt; + +#define SCST_INI_GROUP_ACTION_CREATE 1 +#define SCST_INI_GROUP_ACTION_DEL 2 + + tgt = container_of(kobj->parent, struct scst_tgt, tgt_kobj); + + buffer = kzalloc(count+1, GFP_KERNEL); + if (buffer == NULL) { + res = -ENOMEM; + goto out; + } + + memcpy(buffer, buf, count); + buffer[count] = '\0'; + p = buffer; + + p = buffer; + if (p[strlen(p) - 1] == '\n') + p[strlen(p) - 1] = '\0'; + if (strncasecmp("create ", p, 7) == 0) { + p += 7; + action = SCST_INI_GROUP_ACTION_CREATE; + } else if (strncasecmp("del ", p, 4) == 0) { + p += 4; + action = SCST_INI_GROUP_ACTION_DEL; + } else { + PRINT_ERROR("Unknown action \"%s\"", p); + res = -EINVAL; + goto out_free; + } + + res = scst_suspend_activity(true); + if (res != 0) + goto out_free; + + if (mutex_lock_interruptible(&scst_mutex) != 0) { + res = -EINTR; + goto out_free_resume; + } + + while (isspace(*p) && *p != '\0') + p++; + e = p; + while (!isspace(*e) && *e != '\0') + e++; + *e = '\0'; + + if (p[0] == '\0') { + PRINT_ERROR("%s", "Group name required"); + res = -EINVAL; + goto out_free_up; + } + + list_for_each_entry(a, &tgt->tgt_acg_list, acg_list_entry) { + if (strcmp(a->acg_name, p) == 0) { + TRACE_DBG("group (acg) %p %s found", + a, a->acg_name); + acg = a; + break; + } + } + + switch (action) { + case SCST_INI_GROUP_ACTION_CREATE: + TRACE_DBG("Creating group '%s'", p); + if (acg != NULL) { + PRINT_ERROR("acg name %s exist", p); + res = -EINVAL; + goto out_free_up; + } + + len = strlen(p) + 1; + name = kmalloc(len, GFP_KERNEL); + if (name == NULL) { + PRINT_ERROR("%s", "Allocation of name failed"); + res = -ENOMEM; + goto out_free_up; + } + strlcpy(name, p, len); + + acg = scst_alloc_add_acg(tgt, name); + kfree(name); + if (acg == NULL) + goto out_free_up; + + res = scst_create_acg_sysfs(tgt, acg); + if (res != 0) + goto out_free_acg; + break; + case SCST_INI_GROUP_ACTION_DEL: + TRACE_DBG("Deleting group '%s'", p); + if (acg == NULL) { + PRINT_ERROR("Group %s not found", p); + res = -EINVAL; + goto out_free_up; + } + if (!scst_acg_sess_is_empty(acg)) { + PRINT_ERROR("Group %s is not empty", acg->acg_name); + res = -EBUSY; + goto out_free_up; + } + scst_acg_sysfs_put(acg); + break; + } + + res = count; + +out_free_up: + mutex_unlock(&scst_mutex); + +out_free_resume: + scst_resume_activity(); + +out_free: + kfree(buffer); + +out: + return res; + +out_free_acg: + scst_acg_sysfs_put(acg); + goto out_free_up; + +#undef SCST_LUN_ACTION_CREATE +#undef SCST_LUN_ACTION_DEL +} + +static ssize_t scst_rel_tgt_id_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct scst_tgt *tgt; + int res; + + tgt = container_of(kobj, struct scst_tgt, tgt_kobj); + + res = sprintf(buf, "%d\n%s", tgt->rel_tgt_id, + (tgt->rel_tgt_id != 0) ? SCST_SYSFS_KEY_MARK "\n" : ""); + return res; +} + +static ssize_t scst_rel_tgt_id_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + int res = 0; + struct scst_tgt *tgt; + unsigned long rel_tgt_id; + + if (buf == NULL) + goto out_err; + + tgt = container_of(kobj, struct scst_tgt, tgt_kobj); + + res = strict_strtoul(buf, 0, &rel_tgt_id); + if (res != 0) + goto out_err; + + TRACE_DBG("Try to set relative target port id %d", + (uint16_t)rel_tgt_id); + + if (rel_tgt_id < SCST_MIN_REL_TGT_ID || + rel_tgt_id > SCST_MAX_REL_TGT_ID) { + if ((rel_tgt_id == 0) && !tgt->tgtt->is_target_enabled(tgt)) + goto set; + + PRINT_ERROR("Invalid relative port id %d", + (uint16_t)rel_tgt_id); + res = -EINVAL; + goto out; + } + + if (tgt->tgtt->is_target_enabled(tgt) && + rel_tgt_id != tgt->rel_tgt_id) { + if (!scst_is_relative_target_port_id_unique(rel_tgt_id, tgt)) { + PRINT_ERROR("Relative port id %d is not unique", + (uint16_t)rel_tgt_id); + res = -EBADSLT; + goto out; + } + } + +set: + tgt->rel_tgt_id = (uint16_t)rel_tgt_id; + + res = count; + +out: + return res; + +out_err: + PRINT_ERROR("%s: Requested action not understood: %s", __func__, buf); + res = -EINVAL; + goto out; +} + +int scst_create_acn_sysfs(struct scst_acg *acg, struct scst_acn *acn) +{ + int retval = 0; + int len; + struct kobj_attribute *attr = NULL; + + acn->acn_attr = NULL; + + attr = kzalloc(sizeof(struct kobj_attribute), GFP_KERNEL); + if (attr == NULL) { + PRINT_ERROR("Unable to allocate attributes for initiator '%s'", + acn->name); + retval = -ENOMEM; + goto out; + } + + len = strlen(acn->name) + 1; + attr->attr.name = kzalloc(len, GFP_KERNEL); + if (attr->attr.name == NULL) { + PRINT_ERROR("Unable to allocate attributes for initiator '%s'", + acn->name); + retval = -ENOMEM; + goto out_free; + } + strlcpy((char *)attr->attr.name, acn->name, len); + + attr->attr.owner = THIS_MODULE; + attr->attr.mode = S_IRUGO; + attr->show = scst_acn_file_show; + attr->store = NULL; + + retval = sysfs_create_file(acg->initiators_kobj, &attr->attr); + if (retval != 0) { + PRINT_ERROR("Unable to create acn '%s' for group '%s'", + acn->name, acg->acg_name); + kfree(attr->attr.name); + goto out_free; + } + + acn->acn_attr = attr; + +out: + return retval; + +out_free: + kfree(attr); + goto out; +} + +void scst_acn_sysfs_del(struct scst_acg *acg, struct scst_acn *acn, + bool reassign) +{ + + if (acn->acn_attr != NULL) { + sysfs_remove_file(acg->initiators_kobj, + &acn->acn_attr->attr); + kfree(acn->acn_attr->attr.name); + kfree(acn->acn_attr); + } + scst_acg_remove_acn(acn); + if (reassign) + scst_check_reassign_sessions(); + return; +} + +static ssize_t scst_acn_file_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + return scnprintf(buf, SCST_SYSFS_BLOCK_SIZE, "%s\n", + attr->attr.name); +} + +static ssize_t scst_acg_luns_mgmt_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count) +{ + int res; + struct scst_acg *acg; + + acg = container_of(kobj->parent, struct scst_acg, acg_kobj); + res = __scst_luns_mgmt_store(acg, kobj, buf, count); + return res; +} + +static ssize_t scst_acg_ini_mgmt_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + static char *help = "Usage: echo \"add INITIATOR_NAME\" " + ">mgmt\n" + " echo \"del INITIATOR_NAME\" " + ">mgmt\n" + " echo \"move INITIATOR_NAME DEST_GROUP_NAME\" " + ">mgmt\n" + " echo \"clear\" " + ">mgmt\n"; + + return sprintf(buf, help); +} + +static ssize_t scst_acg_ini_mgmt_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + int res, action; + char *buffer, *p, *e = NULL; + char *name = NULL, *group = NULL; + struct scst_acg *acg = NULL, *acg_dest = NULL; + struct scst_tgt *tgt = NULL; + struct scst_acn *acn = NULL, *acn_tmp; + +#define SCST_ACG_ACTION_INI_ADD 1 +#define SCST_ACG_ACTION_INI_DEL 2 +#define SCST_ACG_ACTION_INI_CLEAR 3 +#define SCST_ACG_ACTION_INI_MOVE 4 + + acg = container_of(kobj->parent, struct scst_acg, acg_kobj); + + buffer = kzalloc(count+1, GFP_KERNEL); + if (buffer == NULL) { + res = -ENOMEM; + goto out; + } + + memcpy(buffer, buf, count); + buffer[count] = '\0'; + p = buffer; + + p = buffer; + if (p[strlen(p) - 1] == '\n') + p[strlen(p) - 1] = '\0'; + + if (strncasecmp("add", p, 3) == 0) { + p += 3; + action = SCST_ACG_ACTION_INI_ADD; + } else if (strncasecmp("del", p, 3) == 0) { + p += 3; + action = SCST_ACG_ACTION_INI_DEL; + } else if (strncasecmp("clear", p, 5) == 0) { + p += 5; + action = SCST_ACG_ACTION_INI_CLEAR; + } else if (strncasecmp("move", p, 4) == 0) { + p += 4; + action = SCST_ACG_ACTION_INI_MOVE; + } else { + PRINT_ERROR("Unknown action \"%s\"", p); + res = -EINVAL; + goto out_free; + } + + if (action != SCST_ACG_ACTION_INI_CLEAR) + if (!isspace(*p)) { + PRINT_ERROR("%s", "Syntax error"); + res = -EINVAL; + goto out_free; + } + + res = scst_su
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