diff options
Diffstat (limited to 'drivers/s390/char/vmlogrdr.c')
| -rw-r--r-- | drivers/s390/char/vmlogrdr.c | 486 |
1 files changed, 237 insertions, 249 deletions
diff --git a/drivers/s390/char/vmlogrdr.c b/drivers/s390/char/vmlogrdr.c index 491f00c032e..a8848db7b09 100644 --- a/drivers/s390/char/vmlogrdr.c +++ b/drivers/s390/char/vmlogrdr.c @@ -1,34 +1,36 @@ /* - * drivers/s390/char/vmlogrdr.c * character device driver for reading z/VM system service records * * - * Copyright (C) 2004 IBM Corporation + * Copyright IBM Corp. 2004, 2009 * character device driver for reading z/VM system service records, * Version 1.0 * Author(s): Xenia Tkatschow <xenia@us.ibm.com> * Stefan Weinhuber <wein@de.ibm.com> * */ + +#define KMSG_COMPONENT "vmlogrdr" +#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt + #include <linux/module.h> #include <linux/init.h> +#include <linux/slab.h> #include <linux/errno.h> #include <linux/types.h> #include <linux/interrupt.h> #include <linux/spinlock.h> -#include <asm/atomic.h> +#include <linux/atomic.h> #include <asm/uaccess.h> #include <asm/cpcmd.h> #include <asm/debug.h> #include <asm/ebcdic.h> -#include "../net/iucv.h" +#include <net/iucv/iucv.h> #include <linux/kmod.h> #include <linux/cdev.h> #include <linux/device.h> #include <linux/string.h> - - MODULE_AUTHOR ("(C) 2004 IBM Corporation by Xenia Tkatschow (xenia@us.ibm.com)\n" " Stefan Weinhuber (wein@de.ibm.com)"); @@ -60,12 +62,11 @@ struct vmlogrdr_priv_t { char system_service[8]; char internal_name[8]; char recording_name[8]; - u16 pathid; + struct iucv_path *path; int connection_established; int iucv_path_severed; - iucv_MessagePending local_interrupt_buffer; + struct iucv_message local_interrupt_buffer; atomic_t receive_ready; - iucv_handle_t iucv_handle; int minor_num; char * buffer; char * current_position; @@ -75,7 +76,7 @@ struct vmlogrdr_priv_t { int dev_in_use; /* 1: already opened, 0: not opened*/ spinlock_t priv_lock; struct device *device; - struct class_device *class_device; + struct device *class_device; int autorecording; int autopurge; }; @@ -86,51 +87,33 @@ struct vmlogrdr_priv_t { */ static int vmlogrdr_open(struct inode *, struct file *); static int vmlogrdr_release(struct inode *, struct file *); -static ssize_t vmlogrdr_read (struct file *filp, char *data, size_t count, - loff_t * ppos); +static ssize_t vmlogrdr_read (struct file *filp, char __user *data, + size_t count, loff_t * ppos); -static struct file_operations vmlogrdr_fops = { +static const struct file_operations vmlogrdr_fops = { .owner = THIS_MODULE, .open = vmlogrdr_open, .release = vmlogrdr_release, .read = vmlogrdr_read, + .llseek = no_llseek, }; -static u8 iucvMagic[16] = { - 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, - 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40 -}; +static void vmlogrdr_iucv_path_complete(struct iucv_path *, u8 ipuser[16]); +static void vmlogrdr_iucv_path_severed(struct iucv_path *, u8 ipuser[16]); +static void vmlogrdr_iucv_message_pending(struct iucv_path *, + struct iucv_message *); -static u8 mask[] = { - 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, - 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, - 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, - 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff +static struct iucv_handler vmlogrdr_iucv_handler = { + .path_complete = vmlogrdr_iucv_path_complete, + .path_severed = vmlogrdr_iucv_path_severed, + .message_pending = vmlogrdr_iucv_message_pending, }; -static u8 iucv_host[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; - - -static void -vmlogrdr_iucv_ConnectionComplete(iucv_ConnectionComplete *eib, void *pgm_data); -static void -vmlogrdr_iucv_ConnectionSevered(iucv_ConnectionSevered *eib, void *pgm_data); -static void -vmlogrdr_iucv_MessagePending(iucv_MessagePending *eib, void *pgm_data); - - -static iucv_interrupt_ops_t vmlogrdr_iucvops = { - .ConnectionComplete = vmlogrdr_iucv_ConnectionComplete, - .ConnectionSevered = vmlogrdr_iucv_ConnectionSevered, - .MessagePending = vmlogrdr_iucv_MessagePending, -}; - - -DECLARE_WAIT_QUEUE_HEAD(conn_wait_queue); -DECLARE_WAIT_QUEUE_HEAD(read_wait_queue); +static DECLARE_WAIT_QUEUE_HEAD(conn_wait_queue); +static DECLARE_WAIT_QUEUE_HEAD(read_wait_queue); /* * pointer to system service private structure @@ -145,7 +128,7 @@ static struct vmlogrdr_priv_t sys_ser[] = { .recording_name = "EREP", .minor_num = 0, .buffer_free = 1, - .priv_lock = SPIN_LOCK_UNLOCKED, + .priv_lock = __SPIN_LOCK_UNLOCKED(sys_ser[0].priv_lock), .autorecording = 1, .autopurge = 1, }, @@ -154,7 +137,7 @@ static struct vmlogrdr_priv_t sys_ser[] = { .recording_name = "ACCOUNT", .minor_num = 1, .buffer_free = 1, - .priv_lock = SPIN_LOCK_UNLOCKED, + .priv_lock = __SPIN_LOCK_UNLOCKED(sys_ser[1].priv_lock), .autorecording = 1, .autopurge = 1, }, @@ -163,7 +146,7 @@ static struct vmlogrdr_priv_t sys_ser[] = { .recording_name = "SYMPTOM", .minor_num = 2, .buffer_free = 1, - .priv_lock = SPIN_LOCK_UNLOCKED, + .priv_lock = __SPIN_LOCK_UNLOCKED(sys_ser[2].priv_lock), .autorecording = 1, .autopurge = 1, } @@ -177,27 +160,27 @@ static struct cdev *vmlogrdr_cdev = NULL; static int recording_class_AB; -static void -vmlogrdr_iucv_ConnectionComplete (iucv_ConnectionComplete * eib, - void * pgm_data) +static void vmlogrdr_iucv_path_complete(struct iucv_path *path, u8 ipuser[16]) { - struct vmlogrdr_priv_t * logptr = pgm_data; + struct vmlogrdr_priv_t * logptr = path->private; + spin_lock(&logptr->priv_lock); logptr->connection_established = 1; spin_unlock(&logptr->priv_lock); wake_up(&conn_wait_queue); - return; } -static void -vmlogrdr_iucv_ConnectionSevered (iucv_ConnectionSevered * eib, void * pgm_data) +static void vmlogrdr_iucv_path_severed(struct iucv_path *path, u8 ipuser[16]) { - u8 reason = (u8) eib->ipuser[8]; - struct vmlogrdr_priv_t * logptr = pgm_data; + struct vmlogrdr_priv_t * logptr = path->private; + u8 reason = (u8) ipuser[8]; + + pr_err("vmlogrdr: connection severed with reason %i\n", reason); - printk (KERN_ERR "vmlogrdr: connection severed with" - " reason %i\n", reason); + iucv_path_sever(path, NULL); + kfree(path); + logptr->path = NULL; spin_lock(&logptr->priv_lock); logptr->connection_established = 0; @@ -210,10 +193,10 @@ vmlogrdr_iucv_ConnectionSevered (iucv_ConnectionSevered * eib, void * pgm_data) } -static void -vmlogrdr_iucv_MessagePending (iucv_MessagePending * eib, void * pgm_data) +static void vmlogrdr_iucv_message_pending(struct iucv_path *path, + struct iucv_message *msg) { - struct vmlogrdr_priv_t * logptr = pgm_data; + struct vmlogrdr_priv_t * logptr = path->private; /* * This function is the bottom half so it should be quick. @@ -221,23 +204,21 @@ vmlogrdr_iucv_MessagePending (iucv_MessagePending * eib, void * pgm_data) * the usage count */ spin_lock(&logptr->priv_lock); - memcpy(&(logptr->local_interrupt_buffer), eib, sizeof(*eib)); + memcpy(&logptr->local_interrupt_buffer, msg, sizeof(*msg)); atomic_inc(&logptr->receive_ready); spin_unlock(&logptr->priv_lock); wake_up_interruptible(&read_wait_queue); } -static int -vmlogrdr_get_recording_class_AB(void) { - char cp_command[]="QUERY COMMAND RECORDING "; +static int vmlogrdr_get_recording_class_AB(void) +{ + static const char cp_command[] = "QUERY COMMAND RECORDING "; char cp_response[80]; char *tail; int len,i; - printk (KERN_DEBUG "vmlogrdr: query command: %s\n", cp_command); cpcmd(cp_command, cp_response, sizeof(cp_response), NULL); - printk (KERN_DEBUG "vmlogrdr: response: %s", cp_response); len = strnlen(cp_response,sizeof(cp_response)); // now the parsing tail=strnchr(cp_response,len,'='); @@ -259,38 +240,33 @@ vmlogrdr_get_recording_class_AB(void) { } -static int -vmlogrdr_recording(struct vmlogrdr_priv_t * logptr, int action, int purge) { +static int vmlogrdr_recording(struct vmlogrdr_priv_t * logptr, + int action, int purge) +{ char cp_command[80]; char cp_response[160]; char *onoff, *qid_string; + int rc; - memset(cp_command, 0x00, sizeof(cp_command)); - memset(cp_response, 0x00, sizeof(cp_response)); - - onoff = ((action == 1) ? "ON" : "OFF"); + onoff = ((action == 1) ? "ON" : "OFF"); qid_string = ((recording_class_AB == 1) ? " QID * " : ""); - /* + /* * The recording commands needs to be called with option QID * for guests that have previlege classes A or B. * Purging has to be done as separate step, because recording * can't be switched on as long as records are on the queue. * Doing both at the same time doesn't work. */ - - if (purge) { + if (purge && (action == 1)) { + memset(cp_command, 0x00, sizeof(cp_command)); + memset(cp_response, 0x00, sizeof(cp_response)); snprintf(cp_command, sizeof(cp_command), "RECORDING %s PURGE %s", logptr->recording_name, qid_string); - - printk (KERN_DEBUG "vmlogrdr: recording command: %s\n", - cp_command); cpcmd(cp_command, cp_response, sizeof(cp_response), NULL); - printk (KERN_DEBUG "vmlogrdr: recording response: %s", - cp_response); } memset(cp_command, 0x00, sizeof(cp_command)); @@ -299,27 +275,37 @@ vmlogrdr_recording(struct vmlogrdr_priv_t * logptr, int action, int purge) { logptr->recording_name, onoff, qid_string); - - printk (KERN_DEBUG "vmlogrdr: recording command: %s\n", cp_command); cpcmd(cp_command, cp_response, sizeof(cp_response), NULL); - printk (KERN_DEBUG "vmlogrdr: recording response: %s", - cp_response); /* The recording command will usually answer with 'Command complete' * on success, but when the specific service was never connected * before then there might be an additional informational message * 'HCPCRC8072I Recording entry not found' before the - * 'Command complete'. So I use strstr rather then the strncmp. + * 'Command complete'. So I use strstr rather then the strncmp. */ if (strstr(cp_response,"Command complete")) - return 0; + rc = 0; else - return -EIO; + rc = -EIO; + /* + * If we turn recording off, we have to purge any remaining records + * afterwards, as a large number of queued records may impact z/VM + * performance. + */ + if (purge && (action == 0)) { + memset(cp_command, 0x00, sizeof(cp_command)); + memset(cp_response, 0x00, sizeof(cp_response)); + snprintf(cp_command, sizeof(cp_command), + "RECORDING %s PURGE %s", + logptr->recording_name, + qid_string); + cpcmd(cp_command, cp_response, sizeof(cp_response), NULL); + } + return rc; } -static int -vmlogrdr_open (struct inode *inode, struct file *filp) +static int vmlogrdr_open (struct inode *inode, struct file *filp) { int dev_num = 0; struct vmlogrdr_priv_t * logptr = NULL; @@ -327,70 +313,53 @@ vmlogrdr_open (struct inode *inode, struct file *filp) int ret; dev_num = iminor(inode); - if (dev_num > MAXMINOR) + if (dev_num >= MAXMINOR) return -ENODEV; - logptr = &sys_ser[dev_num]; - if (logptr == NULL) - return -ENODEV; /* * only allow for blocking reads to be open */ if (filp->f_flags & O_NONBLOCK) - return -ENOSYS; + return -EOPNOTSUPP; /* Besure this device hasn't already been opened */ spin_lock_bh(&logptr->priv_lock); if (logptr->dev_in_use) { spin_unlock_bh(&logptr->priv_lock); return -EBUSY; - } else { - logptr->dev_in_use = 1; - spin_unlock_bh(&logptr->priv_lock); } - + logptr->dev_in_use = 1; + logptr->connection_established = 0; + logptr->iucv_path_severed = 0; atomic_set(&logptr->receive_ready, 0); logptr->buffer_free = 1; + spin_unlock_bh(&logptr->priv_lock); /* set the file options */ filp->private_data = logptr; filp->f_op = &vmlogrdr_fops; /* start recording for this service*/ - ret=0; - if (logptr->autorecording) + if (logptr->autorecording) { ret = vmlogrdr_recording(logptr,1,logptr->autopurge); - if (ret) - printk (KERN_WARNING "vmlogrdr: failed to start " - "recording automatically\n"); - - /* Register with iucv driver */ - logptr->iucv_handle = iucv_register_program(iucvMagic, - logptr->system_service, mask, &vmlogrdr_iucvops, - logptr); - - if (logptr->iucv_handle == NULL) { - printk (KERN_ERR "vmlogrdr: failed to register with" - "iucv driver\n"); - goto not_registered; + if (ret) + pr_warning("vmlogrdr: failed to start " + "recording automatically\n"); } /* create connection to the system service */ - spin_lock_bh(&logptr->priv_lock); - logptr->connection_established = 0; - logptr->iucv_path_severed = 0; - spin_unlock_bh(&logptr->priv_lock); - - connect_rc = iucv_connect (&(logptr->pathid), 10, iucvMagic, - logptr->system_service, iucv_host, 0, - NULL, NULL, - logptr->iucv_handle, NULL); + logptr->path = iucv_path_alloc(10, 0, GFP_KERNEL); + if (!logptr->path) + goto out_dev; + connect_rc = iucv_path_connect(logptr->path, &vmlogrdr_iucv_handler, + logptr->system_service, NULL, NULL, + logptr); if (connect_rc) { - printk (KERN_ERR "vmlogrdr: iucv connection to %s " - "failed with rc %i \n", logptr->system_service, - connect_rc); - goto not_connected; + pr_err("vmlogrdr: iucv connection to %s " + "failed with rc %i \n", + logptr->system_service, connect_rc); + goto out_path; } /* We've issued the connect and now we must wait for a @@ -399,40 +368,37 @@ vmlogrdr_open (struct inode *inode, struct file *filp) */ wait_event(conn_wait_queue, (logptr->connection_established) || (logptr->iucv_path_severed)); - if (logptr->iucv_path_severed) { - goto not_connected; - } - - return nonseekable_open(inode, filp); + if (logptr->iucv_path_severed) + goto out_record; + nonseekable_open(inode, filp); + return 0; -not_connected: - iucv_unregister_program(logptr->iucv_handle); - logptr->iucv_handle = NULL; -not_registered: +out_record: if (logptr->autorecording) vmlogrdr_recording(logptr,0,logptr->autopurge); +out_path: + kfree(logptr->path); /* kfree(NULL) is ok. */ + logptr->path = NULL; +out_dev: logptr->dev_in_use = 0; return -EIO; - - } -static int -vmlogrdr_release (struct inode *inode, struct file *filp) +static int vmlogrdr_release (struct inode *inode, struct file *filp) { int ret; struct vmlogrdr_priv_t * logptr = filp->private_data; - iucv_unregister_program(logptr->iucv_handle); - logptr->iucv_handle = NULL; - + iucv_path_sever(logptr->path, NULL); + kfree(logptr->path); + logptr->path = NULL; if (logptr->autorecording) { ret = vmlogrdr_recording(logptr,0,logptr->autopurge); if (ret) - printk (KERN_WARNING "vmlogrdr: failed to stop " - "recording automatically\n"); + pr_warning("vmlogrdr: failed to stop " + "recording automatically\n"); } logptr->dev_in_use = 0; @@ -440,8 +406,8 @@ vmlogrdr_release (struct inode *inode, struct file *filp) } -static int -vmlogrdr_receive_data(struct vmlogrdr_priv_t *priv) { +static int vmlogrdr_receive_data(struct vmlogrdr_priv_t *priv) +{ int rc, *temp; /* we need to keep track of two data sizes here: * The number of bytes we need to receive from iucv and @@ -462,29 +428,24 @@ vmlogrdr_receive_data(struct vmlogrdr_priv_t *priv) { * We need to return the total length of the record * + size of FENCE in the first 4 bytes of the buffer. */ - iucv_data_count = - priv->local_interrupt_buffer.ln1msg2.ipbfln1f; + iucv_data_count = priv->local_interrupt_buffer.length; user_data_count = sizeof(int); temp = (int*)priv->buffer; *temp= iucv_data_count + sizeof(FENCE); buffer = priv->buffer + sizeof(int); } /* - * If the record is bigger then our buffer, we receive only + * If the record is bigger than our buffer, we receive only * a part of it. We can get the rest later. */ if (iucv_data_count > NET_BUFFER_SIZE) iucv_data_count = NET_BUFFER_SIZE; - rc = iucv_receive(priv->pathid, - priv->local_interrupt_buffer.ipmsgid, - priv->local_interrupt_buffer.iptrgcls, - buffer, - iucv_data_count, - NULL, - NULL, - &priv->residual_length); + rc = iucv_message_receive(priv->path, + &priv->local_interrupt_buffer, + 0, buffer, iucv_data_count, + &priv->residual_length); spin_unlock_bh(&priv->priv_lock); - /* An rc of 5 indicates that the record was bigger then + /* An rc of 5 indicates that the record was bigger than * the buffer, which is OK for us. A 9 indicates that the * record was purged befor we could receive it. */ @@ -514,8 +475,8 @@ vmlogrdr_receive_data(struct vmlogrdr_priv_t *priv) { } -static ssize_t -vmlogrdr_read (struct file *filp, char *data, size_t count, loff_t * ppos) +static ssize_t vmlogrdr_read(struct file *filp, char __user *data, + size_t count, loff_t * ppos) { int rc; struct vmlogrdr_priv_t * priv = filp->private_data; @@ -547,9 +508,11 @@ vmlogrdr_read (struct file *filp, char *data, size_t count, loff_t * ppos) return count; } -static ssize_t -vmlogrdr_autopurge_store(struct device * dev, struct device_attribute *attr, const char * buf, size_t count) { - struct vmlogrdr_priv_t *priv = dev->driver_data; +static ssize_t vmlogrdr_autopurge_store(struct device * dev, + struct device_attribute *attr, + const char * buf, size_t count) +{ + struct vmlogrdr_priv_t *priv = dev_get_drvdata(dev); ssize_t ret = count; switch (buf[0]) { @@ -566,9 +529,11 @@ vmlogrdr_autopurge_store(struct device * dev, struct device_attribute *attr, con } -static ssize_t -vmlogrdr_autopurge_show(struct device *dev, struct device_attribute *attr, char *buf) { - struct vmlogrdr_priv_t *priv = dev->driver_data; +static ssize_t vmlogrdr_autopurge_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct vmlogrdr_priv_t *priv = dev_get_drvdata(dev); return sprintf(buf, "%u\n", priv->autopurge); } @@ -577,12 +542,14 @@ static DEVICE_ATTR(autopurge, 0644, vmlogrdr_autopurge_show, vmlogrdr_autopurge_store); -static ssize_t -vmlogrdr_purge_store(struct device * dev, struct device_attribute *attr, const char * buf, size_t count) { +static ssize_t vmlogrdr_purge_store(struct device * dev, + struct device_attribute *attr, + const char * buf, size_t count) +{ char cp_command[80]; char cp_response[80]; - struct vmlogrdr_priv_t *priv = dev->driver_data; + struct vmlogrdr_priv_t *priv = dev_get_drvdata(dev); if (buf[0] != '1') return -EINVAL; @@ -606,10 +573,7 @@ vmlogrdr_purge_store(struct device * dev, struct device_attribute *attr, const c "RECORDING %s PURGE ", priv->recording_name); - printk (KERN_DEBUG "vmlogrdr: recording command: %s\n", cp_command); cpcmd(cp_command, cp_response, sizeof(cp_response), NULL); - printk (KERN_DEBUG "vmlogrdr: recording response: %s", - cp_response); return count; } @@ -618,10 +582,11 @@ vmlogrdr_purge_store(struct device * dev, struct device_attribute *attr, const c static DEVICE_ATTR(purge, 0200, NULL, vmlogrdr_purge_store); -static ssize_t -vmlogrdr_autorecording_store(struct device *dev, struct device_attribute *attr, const char *buf, - size_t count) { - struct vmlogrdr_priv_t *priv = dev->driver_data; +static ssize_t vmlogrdr_autorecording_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct vmlogrdr_priv_t *priv = dev_get_drvdata(dev); ssize_t ret = count; switch (buf[0]) { @@ -638,9 +603,11 @@ vmlogrdr_autorecording_store(struct device *dev, struct device_attribute *attr, } -static ssize_t -vmlogrdr_autorecording_show(struct device *dev, struct device_attribute *attr, char *buf) { - struct vmlogrdr_priv_t *priv = dev->driver_data; +static ssize_t vmlogrdr_autorecording_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct vmlogrdr_priv_t *priv = dev_get_drvdata(dev); return sprintf(buf, "%u\n", priv->autorecording); } @@ -649,10 +616,11 @@ static DEVICE_ATTR(autorecording, 0644, vmlogrdr_autorecording_show, vmlogrdr_autorecording_store); -static ssize_t -vmlogrdr_recording_store(struct device * dev, struct device_attribute *attr, const char * buf, size_t count) { - - struct vmlogrdr_priv_t *priv = dev->driver_data; +static ssize_t vmlogrdr_recording_store(struct device * dev, + struct device_attribute *attr, + const char * buf, size_t count) +{ + struct vmlogrdr_priv_t *priv = dev_get_drvdata(dev); ssize_t ret; switch (buf[0]) { @@ -676,20 +644,30 @@ vmlogrdr_recording_store(struct device * dev, struct device_attribute *attr, con static DEVICE_ATTR(recording, 0200, NULL, vmlogrdr_recording_store); -static ssize_t -vmlogrdr_recording_status_show(struct device_driver *driver, char *buf) { +static ssize_t vmlogrdr_recording_status_show(struct device_driver *driver, + char *buf) +{ - char cp_command[] = "QUERY RECORDING "; + static const char cp_command[] = "QUERY RECORDING "; int len; cpcmd(cp_command, buf, 4096, NULL); len = strlen(buf); return len; } - - static DRIVER_ATTR(recording_status, 0444, vmlogrdr_recording_status_show, NULL); +static struct attribute *vmlogrdr_drv_attrs[] = { + &driver_attr_recording_status.attr, + NULL, +}; +static struct attribute_group vmlogrdr_drv_attr_group = { + .attrs = vmlogrdr_drv_attrs, +}; +static const struct attribute_group *vmlogrdr_drv_attr_groups[] = { + &vmlogrdr_drv_attr_group, + NULL, +}; static struct attribute *vmlogrdr_attrs[] = { &dev_attr_autopurge.attr, @@ -698,75 +676,97 @@ static struct attribute *vmlogrdr_attrs[] = { &dev_attr_recording.attr, NULL, }; - static struct attribute_group vmlogrdr_attr_group = { .attrs = vmlogrdr_attrs, }; +static const struct attribute_group *vmlogrdr_attr_groups[] = { + &vmlogrdr_attr_group, + NULL, +}; + +static int vmlogrdr_pm_prepare(struct device *dev) +{ + int rc; + struct vmlogrdr_priv_t *priv = dev_get_drvdata(dev); + + rc = 0; + if (priv) { + spin_lock_bh(&priv->priv_lock); + if (priv->dev_in_use) + rc = -EBUSY; + spin_unlock_bh(&priv->priv_lock); + } + if (rc) + pr_err("vmlogrdr: device %s is busy. Refuse to suspend.\n", + dev_name(dev)); + return rc; +} + + +static const struct dev_pm_ops vmlogrdr_pm_ops = { + .prepare = vmlogrdr_pm_prepare, +}; static struct class *vmlogrdr_class; static struct device_driver vmlogrdr_driver = { .name = "vmlogrdr", .bus = &iucv_bus, + .pm = &vmlogrdr_pm_ops, + .groups = vmlogrdr_drv_attr_groups, }; - -static int -vmlogrdr_register_driver(void) { +static int vmlogrdr_register_driver(void) +{ int ret; - ret = driver_register(&vmlogrdr_driver); - if (ret) { - printk(KERN_ERR "vmlogrdr: failed to register driver.\n"); - return ret; - } + /* Register with iucv driver */ + ret = iucv_register(&vmlogrdr_iucv_handler, 1); + if (ret) + goto out; - ret = driver_create_file(&vmlogrdr_driver, - &driver_attr_recording_status); - if (ret) { - printk(KERN_ERR "vmlogrdr: failed to add driver attribute.\n"); - goto unregdriver; - } + ret = driver_register(&vmlogrdr_driver); + if (ret) + goto out_iucv; vmlogrdr_class = class_create(THIS_MODULE, "vmlogrdr"); if (IS_ERR(vmlogrdr_class)) { - printk(KERN_ERR "vmlogrdr: failed to create class.\n"); - ret=PTR_ERR(vmlogrdr_class); - vmlogrdr_class=NULL; - goto unregattr; + ret = PTR_ERR(vmlogrdr_class); + vmlogrdr_class = NULL; + goto out_driver; } return 0; -unregattr: - driver_remove_file(&vmlogrdr_driver, &driver_attr_recording_status); -unregdriver: +out_driver: driver_unregister(&vmlogrdr_driver); +out_iucv: + iucv_unregister(&vmlogrdr_iucv_handler, 1); +out: return ret; } -static void -vmlogrdr_unregister_driver(void) { +static void vmlogrdr_unregister_driver(void) +{ class_destroy(vmlogrdr_class); vmlogrdr_class = NULL; - driver_remove_file(&vmlogrdr_driver, &driver_attr_recording_status); driver_unregister(&vmlogrdr_driver); - return; + iucv_unregister(&vmlogrdr_iucv_handler, 1); } -static int -vmlogrdr_register_device(struct vmlogrdr_priv_t *priv) { +static int vmlogrdr_register_device(struct vmlogrdr_priv_t *priv) +{ struct device *dev; int ret; - dev = kmalloc(sizeof(struct device), GFP_KERNEL); + dev = kzalloc(sizeof(struct device), GFP_KERNEL); if (dev) { - memset(dev, 0, sizeof(struct device)); - snprintf(dev->bus_id, BUS_ID_SIZE, "%s", - priv->internal_name); + dev_set_name(dev, "%s", priv->internal_name); dev->bus = &iucv_bus; dev->parent = iucv_root; dev->driver = &vmlogrdr_driver; + dev->groups = vmlogrdr_attr_groups; + dev_set_drvdata(dev, priv); /* * The release function could be called after the * module has been unloaded. It's _only_ task is to @@ -778,37 +778,30 @@ vmlogrdr_register_device(struct vmlogrdr_priv_t *priv) { } else return -ENOMEM; ret = device_register(dev); - if (ret) - return ret; - - ret = sysfs_create_group(&dev->kobj, &vmlogrdr_attr_group); if (ret) { - device_unregister(dev); + put_device(dev); return ret; } - priv->class_device = class_device_create( - vmlogrdr_class, - MKDEV(vmlogrdr_major, priv->minor_num), - dev, - "%s", dev->bus_id ); + + priv->class_device = device_create(vmlogrdr_class, dev, + MKDEV(vmlogrdr_major, + priv->minor_num), + priv, "%s", dev_name(dev)); if (IS_ERR(priv->class_device)) { ret = PTR_ERR(priv->class_device); priv->class_device=NULL; - sysfs_remove_group(&dev->kobj, &vmlogrdr_attr_group); device_unregister(dev); return ret; } - dev->driver_data = priv; priv->device = dev; return 0; } -static int -vmlogrdr_unregister_device(struct vmlogrdr_priv_t *priv ) { - class_device_destroy(vmlogrdr_class, MKDEV(vmlogrdr_major, priv->minor_num)); +static int vmlogrdr_unregister_device(struct vmlogrdr_priv_t *priv) +{ + device_destroy(vmlogrdr_class, MKDEV(vmlogrdr_major, priv->minor_num)); if (priv->device != NULL) { - sysfs_remove_group(&priv->device->kobj, &vmlogrdr_attr_group); device_unregister(priv->device); priv->device=NULL; } @@ -816,8 +809,8 @@ vmlogrdr_unregister_device(struct vmlogrdr_priv_t *priv ) { } -static int -vmlogrdr_register_cdev(dev_t dev) { +static int vmlogrdr_register_cdev(dev_t dev) +{ int rc = 0; vmlogrdr_cdev = cdev_alloc(); if (!vmlogrdr_cdev) { @@ -837,9 +830,10 @@ vmlogrdr_register_cdev(dev_t dev) { } -static void -vmlogrdr_cleanup(void) { +static void vmlogrdr_cleanup(void) +{ int i; + if (vmlogrdr_cdev) { cdev_del(vmlogrdr_cdev); vmlogrdr_cdev=NULL; @@ -856,16 +850,14 @@ vmlogrdr_cleanup(void) { } -static int -vmlogrdr_init(void) +static int __init vmlogrdr_init(void) { int rc; int i; dev_t dev; if (! MACHINE_IS_VM) { - printk (KERN_ERR "vmlogrdr: not running under VM, " - "driver not loaded.\n"); + pr_err("not running under VM, driver not loaded.\n"); return -ENODEV; } @@ -883,7 +875,7 @@ vmlogrdr_init(void) for (i=0; i < MAXMINOR; ++i ) { sys_ser[i].buffer = (char *) get_zeroed_page(GFP_KERNEL); if (!sys_ser[i].buffer) { - rc = ENOMEM; + rc = -ENOMEM; break; } sys_ser[i].current_position = sys_ser[i].buffer; @@ -897,21 +889,17 @@ vmlogrdr_init(void) rc = vmlogrdr_register_cdev(dev); if (rc) goto cleanup; - printk (KERN_INFO "vmlogrdr: driver loaded\n"); return 0; cleanup: vmlogrdr_cleanup(); - printk (KERN_ERR "vmlogrdr: driver not loaded.\n"); return rc; } -static void -vmlogrdr_exit(void) +static void __exit vmlogrdr_exit(void) { vmlogrdr_cleanup(); - printk (KERN_INFO "vmlogrdr: driver unloaded\n"); return; } |