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