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/slab.h> 21#include <linux/wait.h> 22#include <linux/types.h> 23#include <linux/fs.h> 24#include <linux/coda_fs_i.h> 25 26/* operations */ 27extern struct inode_operations coda_dir_inode_operations; 28extern struct inode_operations coda_file_inode_operations; 29extern struct inode_operations coda_ioctl_inode_operations; 30 31extern struct address_space_operations coda_file_aops; 32extern struct address_space_operations coda_symlink_aops; 33 34extern struct file_operations coda_dir_operations; 35extern struct file_operations coda_file_operations; 36extern struct file_operations coda_ioctl_operations; 37 38/* operations shared over more than one file */ 39int coda_open(struct inode *i, struct file *f); 40int coda_flush(struct file *f); 41int coda_release(struct inode *i, struct file *f); 42int coda_permission(struct inode *inode, int mask); 43int coda_revalidate_inode(struct dentry *); 44int coda_notify_change(struct dentry *, struct iattr *); 45int coda_isnullfid(ViceFid *fid); 46 47/* global variables */ 48extern int coda_debug; 49extern int coda_access_cache; 50extern int coda_fake_statfs; 51 52/* this file: heloers */ 53static __inline__ struct ViceFid *coda_i2f(struct inode *); 54static __inline__ char *coda_i2s(struct inode *); 55static __inline__ void coda_flag_inode(struct inode *, int flag); 56char *coda_f2s(ViceFid *f); 57int coda_isroot(struct inode *i); 58int coda_iscontrol(const char *name, size_t length); 59 60void coda_load_creds(struct coda_cred *cred); 61void coda_vattr_to_iattr(struct inode *, struct coda_vattr *); 62void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *); 63unsigned short coda_flags_to_cflags(unsigned short); 64void print_vattr( struct coda_vattr *attr ); 65int coda_cred_ok(struct coda_cred *cred); 66int coda_cred_eq(struct coda_cred *cred1, struct coda_cred *cred2); 67 68/* sysctl.h */ 69void coda_sysctl_init(void); 70void coda_sysctl_clean(void); 71 72 73/* debugging masks */ 74#define D_SUPER 1 /* print results returned by Venus */ 75#define D_INODE 2 /* print entry and exit into procedure */ 76#define D_FILE 4 77#define D_CACHE 8 /* cache debugging */ 78#define D_MALLOC 16 /* print malloc, de-alloc information */ 79#define D_CNODE 32 80#define D_UPCALL 64 /* up and downcall debugging */ 81#define D_PSDEV 128 82#define D_PIOCTL 256 83#define D_SPECIAL 512 84#define D_TIMING 1024 85#define D_DOWNCALL 2048 86 87#define CDEBUG(mask, format, a...) \ 88 do { \ 89 if (coda_debug & mask) { \ 90 printk("(%s,l. %d): ", __FUNCTION__, __LINE__); \ 91 printk(format, ## a); } \ 92} while (0) 93 94#define CODA_ALLOC(ptr, cast, size) do { \ 95 if (size < PAGE_SIZE) \ 96 ptr = (cast)kmalloc((unsigned long) size, GFP_KERNEL); \ 97 else \ 98 ptr = (cast)vmalloc((unsigned long) size); \ 99 if (!ptr) \ 100 printk("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \ 101 else memset( ptr, 0, size ); \ 102} while (0) 103 104 105#define CODA_FREE(ptr,size) \ 106 do { if (size < PAGE_SIZE) kfree((ptr)); else vfree((ptr)); } while (0) 107 108/* inode to cnode access functions */ 109 110#define ITOC(inode) (&((inode)->u.coda_i)) 111 112static __inline__ struct ViceFid *coda_i2f(struct inode *inode) 113{ 114 return &(ITOC(inode)->c_fid); 115} 116 117static __inline__ char *coda_i2s(struct inode *inode) 118{ 119 return coda_f2s(&(ITOC(inode)->c_fid)); 120} 121 122/* this will not zap the inode away */ 123static __inline__ void coda_flag_inode(struct inode *inode, int flag) 124{ 125 ITOC(inode)->c_flags |= flag; 126} 127 128#endif 129