include/linux/coda_linux.h

   1 /*
   2  * Coda File System, Linux Kernel module
   3  *
   4  * Original version, adapted from cfs_mach.c, (C) Carnegie Mellon University
   5  * Linux modifications (C) 1996, Peter J. Braam
   6  * Rewritten for Linux 2.1 (C) 1997 Carnegie Mellon University
   7  *
   8  * Carnegie Mellon University encourages users of this software to
   9  * contribute improvements to the Coda project.
  10  */
  11
  12 #ifndef _LINUX_CODA_FS
  13 #define _LINUX_CODA_FS
  14
  15 #include <linux/kernel.h>
  16 #include <linux/param.h>
  17 #include <linux/sched.h>
  18 #include <linux/mm.h>
  19 #include <linux/vmalloc.h>
  20 #include <linux/malloc.h>
  21 #include <linux/wait.h>
  22 #include <linux/types.h>
  23 #include <linux/fs.h>
  24
  25 /* operations */
  26 extern struct inode_operations coda_dir_inode_operations;
  27 extern struct inode_operations coda_file_inode_operations;
  28 extern struct inode_operations coda_ioctl_inode_operations;
  29
  30 extern struct address_space_operations coda_file_aops;
  31 extern struct address_space_operations coda_symlink_aops;
  32
  33 extern struct file_operations coda_dir_operations;
  34 extern struct file_operations coda_file_operations;
  35 extern struct file_operations coda_ioctl_operations;
  36
  37 /* operations shared over more than one file */
  38 int coda_open(struct inode *i, struct file *f);
  39 int coda_release(struct inode *i, struct file *f);
  40 int coda_permission(struct inode *inode, int mask);
  41 int coda_revalidate_inode(struct dentry *);
  42 int coda_notify_change(struct dentry *, struct iattr *);
  43
  44 /* global variables */
  45 extern int coda_debug;
  46 extern int coda_print_entry;
  47 extern int coda_access_cache;
  48
  49 /* this file:  heloers */
  50 static __inline__ struct ViceFid *coda_i2f(struct inode *);
  51 static __inline__ char *coda_i2s(struct inode *);
  52 static __inline__ void coda_flag_inode(struct inode *, int flag);
  53 char *coda_f2s(ViceFid *f);
  54 char *coda_f2s2(ViceFid *f);
  55 int coda_isroot(struct inode *i);
  56 int coda_fid_is_volroot(struct ViceFid *);
  57 int coda_fid_is_weird(struct ViceFid *fid);
  58 int coda_iscontrol(const char *name, size_t length);
  59
  60 void coda_load_creds(struct coda_cred *cred);
  61 void coda_vattr_to_iattr(struct inode *, struct coda_vattr *);
  62 void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *);
  63 unsigned short coda_flags_to_cflags(unsigned short);
  64 void print_vattr( struct coda_vattr *attr );
  65 int coda_cred_ok(struct coda_cred *cred);
  66 int coda_cred_eq(struct coda_cred *cred1, struct coda_cred *cred2);
  67
  68 /* cache.c */
  69 void coda_purge_children(struct inode *, int);
  70 void coda_purge_dentries(struct inode *);
  71
  72 /* sysctl.h */
  73 void coda_sysctl_init(void);
  74 void coda_sysctl_clean(void);
  75
  76
  77 /* debugging masks */
  78 #define D_SUPER     1   /* print results returned by Venus */
  79 #define D_INODE     2   /* print entry and exit into procedure */
  80 #define D_FILE      4
  81 #define D_CACHE     8   /* cache debugging */
  82 #define D_MALLOC    16  /* print malloc, de-alloc information */
  83 #define D_CNODE     32
  84 #define D_UPCALL    64  /* up and downcall debugging */
  85 #define D_PSDEV    128
  86 #define D_PIOCTL   256
  87 #define D_SPECIAL  512
  88 #define D_TIMING  1024
  89 #define D_DOWNCALL 2048
  90
  91 #define CDEBUG(mask, format, a...)                                \
  92   do {                                                            \
  93   if (coda_debug & mask) {                                        \
  94     printk("(%s,l. %d): ",  __FUNCTION__, __LINE__);              \
  95     printk(format, ## a); }                                       \
  96 } while (0)
  97
  98 #define ENTRY    \
  99     if(coda_print_entry) printk("Process %d entered %s\n",current->pid,__FUNCTION__)
 100
 101 #define EXIT    \
 102     if(coda_print_entry) printk("Process %d leaving %s\n",current->pid,__FUNCTION__)
 103
 104 #define CODA_ALLOC(ptr, cast, size)                                       \
 105 do {                                                                      \
 106     if (size < PAGE_SIZE) {                                               \
 107         ptr = (cast)kmalloc((unsigned long) size, GFP_KERNEL);            \
 108         CDEBUG(D_MALLOC, "kmalloced: %lx at %p.\n", (long)size, ptr);     \
 109      }  else {                                                            \
 110         ptr = (cast)vmalloc((unsigned long) size);                        \
 111         CDEBUG(D_MALLOC, "vmalloced: %lx at %p .\n", (long)size, ptr);}   \
 112     if (ptr == 0) {                                                       \
 113         printk("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \
 114     }                                                                     \
 115     else memset( ptr, 0, size );                                          \
 116 } while (0)
 117
 118
 119 #define CODA_FREE(ptr,size) do {if (size < PAGE_SIZE) { kfree((ptr)); CDEBUG(D_MALLOC, "kfreed: %lx at %p.\n", (long) size, ptr); } else { vfree((ptr)); CDEBUG(D_MALLOC, "vfreed: %lx at %p.\n", (long) size, ptr);} } while (0)
 120
 121 /* inode to cnode access functions */
 122
 123 static __inline__ struct ViceFid *coda_i2f(struct inode *inode)
 124 {
 125         return &(inode->u.coda_i.c_fid);
 126 }
 127
 128 static __inline__ char *coda_i2s(struct inode *inode)
 129 {
 130         return coda_f2s(&(inode->u.coda_i.c_fid));
 131 }
 132
 133 /* this will not zap the inode away */
 134 static __inline__ void coda_flag_inode(struct inode *inode, int flag)
 135 {
 136         inode->u.coda_i.c_flags |= flag;
 137 }
 138
 139 #define ITOC(inode) (&((inode)->u.coda_i))
 140
 141 #endif