drivers/misc/samsung/scsc/scsc_log_collector_proc.h

   1 /****************************************************************************
   2  *
   3  * Copyright (c) 2014 - 2018 Samsung Electronics Co., Ltd. All rights reserved
   4  *
   5  ****************************************************************************/
   6
   7 /*
   8  * Chip Manager /proc interface
   9  */
  10 #include <linux/proc_fs.h>
  11 #include <linux/version.h>
  12 #include <linux/seq_file.h>
  13
  14 #ifndef SCSC_LOG_COLLECT_PROC_H
  15 #define SCSC_LOG_COLLECT_PROC_H
  16
  17 #ifndef AID_MX
  18 #define AID_MX  0444
  19 #endif
  20
  21 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 10, 9))
  22 #define LOG_COLLECT_PDE_DATA(inode) PDE_DATA(inode)
  23 #else
  24 #define LOG_COLLECT_PDE_DATA(inode) (PDE(inode)->data)
  25 #endif
  26
  27 #define LOG_COLLECT_PROCFS_RW_FILE_OPS(name)                                           \
  28         static ssize_t log_collect_procfs_ ## name ## _write(struct file *file, const char __user *user_buf, size_t count, loff_t *ppos); \
  29         static ssize_t                      log_collect_procfs_ ## name ## _read(struct file *file, char __user *user_buf, size_t count, loff_t *ppos); \
  30         static const struct file_operations log_collect_procfs_ ## name ## _fops = { \
  31                 .read = log_collect_procfs_ ## name ## _read,                        \
  32                 .write = log_collect_procfs_ ## name ## _write,                      \
  33                 .open = log_collect_procfs_open_file_generic,                     \
  34                 .llseek = generic_file_llseek                                 \
  35         }
  36
  37
  38 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 10, 9))
  39 #define LOG_COLLECT_PROCFS_SET_UID_GID(_entry) \
  40         do { \
  41                 kuid_t proc_kuid = KUIDT_INIT(AID_MX); \
  42                 kgid_t proc_kgid = KGIDT_INIT(AID_MX); \
  43                 proc_set_user(_entry, proc_kuid, proc_kgid); \
  44         } while (0)
  45 #else
  46 #define LOG_COLLECT_PROCFS_SET_UID_GID(entry) \
  47         do { \
  48                 (entry)->uid = AID_MX; \
  49                 (entry)->gid = AID_MX; \
  50         } while (0)
  51 #endif
  52
  53 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 10, 9))
  54 #define LOG_COLLECT_PROCFS_ADD_FILE(_sdev, name, parent, mode)                      \
  55         do {                                                               \
  56                 struct proc_dir_entry *entry = proc_create_data(# name, mode, parent, &log_collect_procfs_ ## name ## _fops, _sdev); \
  57                 LOG_COLLECT_PROCFS_SET_UID_GID(entry);                            \
  58         } while (0)
  59 #else
  60 #define LOG_COLLECT_PROCFS_ADD_FILE(_sdev, name, parent, mode)                      \
  61         do {                                                               \
  62                 struct proc_dir_entry *entry;                              \
  63                 entry = create_proc_entry(# name, mode, parent);           \
  64                 if (entry) {                                               \
  65                         entry->proc_fops = &log_collect_procfs_ ## name ## _fops; \
  66                         entry->data = _sdev;                               \
  67                         LOG_COLLECT_PROCFS_SET_UID_GID(entry);                      \
  68                 }                                                          \
  69         } while (0)
  70 #endif
  71
  72 #define LOG_COLLECT_PROCFS_REMOVE_FILE(name, parent) remove_proc_entry(# name, parent)
  73
  74 int scsc_log_collect_proc_create(void);
  75 void scsc_log_collect_proc_remove(void);
  76
  77 #endif /* SCSC_log_collect__PROC_H */