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 extern struct inode_operations coda_symlink_inode_operations;
  30
  31 extern struct file_operations coda_dir_operations;
  32 extern struct file_operations coda_file_operations;
  33 extern struct file_operations coda_ioctl_operations;
  34
  35 /* operations shared over more than one file */
  36 int coda_open(struct inode *i, struct file *f);
  37 int coda_release(struct inode *i, struct file *f);
  38 int coda_permission(struct inode *inode, int mask);
  39 int coda_revalidate_inode(struct dentry *);
  40
  41 /* global variables */
  42 extern int coda_debug;
  43 extern int coda_print_entry;
  44 extern int coda_access_cache;
  45
  46 /* this file:  heloers */
  47 static __inline__ struct ViceFid *coda_i2f(struct inode *);
  48 char *coda_f2s(ViceFid *f);
  49 char *coda_f2s2(ViceFid *f);
  50 int coda_isroot(struct inode *i);
  51 int coda_fid_is_volroot(struct ViceFid *);
  52 int coda_fid_is_weird(struct ViceFid *fid);
  53 int coda_iscontrol(const char *name, size_t length);
  54
  55 void coda_load_creds(struct coda_cred *cred);
  56 int coda_mycred(struct coda_cred *);
  57 void coda_vattr_to_iattr(struct inode *, struct coda_vattr *);
  58 void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *);
  59 unsigned short coda_flags_to_cflags(unsigned short);
  60 void print_vattr( struct coda_vattr *attr );
  61 int coda_cred_ok(struct coda_cred *cred);
  62 int coda_cred_eq(struct coda_cred *cred1, struct coda_cred *cred2);
  63
  64 /* defined in  file.c */
  65 void coda_prepare_openfile(struct inode *coda_inode, struct file *coda_file,
  66                            struct inode *open_inode,  struct file *open_file,
  67                            struct dentry *open_dentry);
  68 void coda_restore_codafile(struct inode *coda_inode, struct file *coda_file,
  69                            struct inode *open_inode, struct file *open_file);
  70 int coda_inode_grab(dev_t dev, ino_t ino, struct inode **ind);
  71
  72 #define NB_SFS_SIZ 0x895440
  73
  74 /* cache.c */
  75 void coda_purge_children(struct inode *, int);
  76 void coda_purge_dentries(struct inode *);
  77
  78 /* sysctl.h */
  79 void coda_sysctl_init(void);
  80 void coda_sysctl_clean(void);
  81
  82
  83 /* debugging masks */
  84 #define D_SUPER     1   /* print results returned by Venus */
  85 #define D_INODE     2   /* print entry and exit into procedure */
  86 #define D_FILE      4
  87 #define D_CACHE     8   /* cache debugging */
  88 #define D_MALLOC    16  /* print malloc, de-alloc information */
  89 #define D_CNODE     32
  90 #define D_UPCALL    64  /* up and downcall debugging */
  91 #define D_PSDEV    128
  92 #define D_PIOCTL   256
  93 #define D_SPECIAL  512
  94 #define D_TIMING  1024
  95 #define D_DOWNCALL 2048
  96
  97 #define CDEBUG(mask, format, a...)                                \
  98   do {                                                            \
  99   if (coda_debug & mask) {                                        \
 100     printk("(%s,l. %d): ",  __FUNCTION__, __LINE__);              \
 101     printk(format, ## a); }                                       \
 102 } while (0) ;
 103
 104 #define ENTRY    \
 105     if(coda_print_entry) printk("Process %d entered %s\n",current->pid,__FUNCTION__)
 106
 107 #define EXIT    \
 108     if(coda_print_entry) printk("Process %d leaving %s\n",current->pid,__FUNCTION__)
 109
 110 #define CHECK_CNODE(c) do {  } while (0);
 111
 112 #define CODA_ALLOC(ptr, cast, size)                                       \
 113 do {                                                                      \
 114     if (size < 3000) {                                                    \
 115         ptr = (cast)kmalloc((unsigned long) size, GFP_KERNEL);            \
 116                 CDEBUG(D_MALLOC, "kmalloced: %x at %x.\n", (int) size, (int) ptr);\
 117      }  else {                                                             \
 118         ptr = (cast)vmalloc((unsigned long) size);                        \
 119         CDEBUG(D_MALLOC, "vmalloced: %x at %x.\n", (int) size, (int) ptr);}\
 120     if (ptr == 0) {                                                       \
 121         printk("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__);  \
 122     }                                                                     \
 123     memset( ptr, 0, size );                                                   \
 124 } while (0)
 125
 126
 127 #define CODA_FREE(ptr,size) do {if (size < 3000) { kfree_s((ptr), (size)); CDEBUG(D_MALLOC, "kfreed: %x at %x.\n", (int) size, (int) ptr); } else { vfree((ptr)); CDEBUG(D_MALLOC, "vfreed: %x at %x.\n", (int) size, (int) ptr);} } while (0)
 128
 129 /* inode to cnode */
 130
 131 static __inline__ struct ViceFid *coda_i2f(struct inode *inode)
 132 {
 133         return &(inode->u.coda_i.c_fid);
 134 }
 135
 136 #define ITOC(inode) (&((inode)->u.coda_i))
 137
 138
 139
 140
 141
 142
 143 #endif