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#ifdef pr_fmt 16#undef pr_fmt 17#endif 18 19#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 20 21#include <linux/kernel.h> 22#include <linux/param.h> 23#include <linux/mm.h> 24#include <linux/vmalloc.h> 25#include <linux/slab.h> 26#include <linux/wait.h> 27#include <linux/types.h> 28#include <linux/fs.h> 29#include "coda_fs_i.h" 30 31/* operations */ 32extern const struct inode_operations coda_dir_inode_operations; 33extern const struct inode_operations coda_file_inode_operations; 34extern const struct inode_operations coda_ioctl_inode_operations; 35 36extern const struct dentry_operations coda_dentry_operations; 37 38extern const struct address_space_operations coda_file_aops; 39extern const struct address_space_operations coda_symlink_aops; 40 41extern const struct file_operations coda_dir_operations; 42extern const struct file_operations coda_file_operations; 43extern const struct file_operations coda_ioctl_operations; 44 45/* operations shared over more than one file */ 46int coda_open(struct inode *i, struct file *f); 47int coda_release(struct inode *i, struct file *f); 48int coda_permission(struct inode *inode, int mask); 49int coda_revalidate_inode(struct inode *); 50int coda_getattr(struct vfsmount *, struct dentry *, struct kstat *); 51int coda_setattr(struct dentry *, struct iattr *); 52 53/* this file: heloers */ 54char *coda_f2s(struct CodaFid *f); 55int coda_iscontrol(const char *name, size_t length); 56 57void coda_vattr_to_iattr(struct inode *, struct coda_vattr *); 58void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *); 59unsigned short coda_flags_to_cflags(unsigned short); 60 61/* sysctl.h */ 62void coda_sysctl_init(void); 63void coda_sysctl_clean(void); 64 65#define CODA_ALLOC(ptr, cast, size) do { \ 66 if (size < PAGE_SIZE) \ 67 ptr = kzalloc((unsigned long) size, GFP_KERNEL); \ 68 else \ 69 ptr = (cast)vzalloc((unsigned long) size); \ 70 if (!ptr) \ 71 pr_warn("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \ 72} while (0) 73 74 75#define CODA_FREE(ptr,size) \ 76 do { if (size < PAGE_SIZE) kfree((ptr)); else vfree((ptr)); } while (0) 77 78/* inode to cnode access functions */ 79 80static inline struct coda_inode_info *ITOC(struct inode *inode) 81{ 82 return list_entry(inode, struct coda_inode_info, vfs_inode); 83} 84 85static __inline__ struct CodaFid *coda_i2f(struct inode *inode) 86{ 87 return &(ITOC(inode)->c_fid); 88} 89 90static __inline__ char *coda_i2s(struct inode *inode) 91{ 92 return coda_f2s(&(ITOC(inode)->c_fid)); 93} 94 95/* this will not zap the inode away */ 96static __inline__ void coda_flag_inode(struct inode *inode, int flag) 97{ 98 struct coda_inode_info *cii = ITOC(inode); 99 100 spin_lock(&cii->c_lock); 101 cii->c_flags |= flag; 102 spin_unlock(&cii->c_lock); 103} 104 105#endif 106