diff options
Diffstat (limited to 'drivers/scsi/scsi_proc.c')
| -rw-r--r-- | drivers/scsi/scsi_proc.c | 68 |
1 files changed, 59 insertions, 9 deletions
diff --git a/drivers/scsi/scsi_proc.c b/drivers/scsi/scsi_proc.c index ad747dc337da..6f4c3cff03bb 100644 --- a/drivers/scsi/scsi_proc.c +++ b/drivers/scsi/scsi_proc.c @@ -97,6 +97,49 @@ out: return ret; } +static ssize_t proc_scsi_host_write(struct file *file, const char __user *buf, + size_t count, loff_t *ppos) +{ + struct Scsi_Host *shost = PDE(file_inode(file))->data; + ssize_t ret = -ENOMEM; + char *page; + + if (count > PROC_BLOCK_SIZE) + return -EOVERFLOW; + + if (!shost->hostt->write_info) + return -EINVAL; + + page = (char *)__get_free_page(GFP_KERNEL); + if (page) { + ret = -EFAULT; + if (copy_from_user(page, buf, count)) + goto out; + ret = shost->hostt->write_info(shost, page, count); + } +out: + free_page((unsigned long)page); + return ret; +} + +static int proc_scsi_show(struct seq_file *m, void *v) +{ + struct Scsi_Host *shost = m->private; + return shost->hostt->show_info(m, shost); +} + +static int proc_scsi_host_open(struct inode *inode, struct file *file) +{ + return single_open(file, proc_scsi_show, PDE(inode)->data); +} + +static const struct file_operations proc_scsi_fops = { + .open = proc_scsi_host_open, + .read = seq_read, + .llseek = seq_lseek, + .write = proc_scsi_host_write +}; + /** * scsi_proc_hostdir_add - Create directory in /proc for a scsi host * @sht: owner of this directory @@ -106,7 +149,7 @@ out: void scsi_proc_hostdir_add(struct scsi_host_template *sht) { - if (!sht->proc_info) + if (!sht->proc_info && !sht->show_info) return; mutex_lock(&global_host_template_mutex); @@ -125,7 +168,7 @@ void scsi_proc_hostdir_add(struct scsi_host_template *sht) */ void scsi_proc_hostdir_rm(struct scsi_host_template *sht) { - if (!sht->proc_info) + if (!sht->proc_info && !sht->show_info) return; mutex_lock(&global_host_template_mutex); @@ -151,16 +194,23 @@ void scsi_proc_host_add(struct Scsi_Host *shost) return; sprintf(name,"%d", shost->host_no); + if (sht->show_info) { + p = proc_create_data(name, S_IRUGO | S_IWUSR, + sht->proc_dir, &proc_scsi_fops, shost); + if (!p) + goto Fail; + return; + } p = create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR, sht->proc_dir, proc_scsi_read, shost); - if (!p) { - printk(KERN_ERR "%s: Failed to register host %d in" - "%s\n", __func__, shost->host_no, - sht->proc_name); + if (p) { + p->write_proc = proc_scsi_write_proc; return; - } - - p->write_proc = proc_scsi_write_proc; + } +Fail: + printk(KERN_ERR "%s: Failed to register host %d in" + "%s\n", __func__, shost->host_no, + sht->proc_name); } /** |