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 */ 32 extern const struct inode_operations coda_dir_inode_operations; 33 extern const struct inode_operations coda_file_inode_operations; 34 extern const struct inode_operations coda_ioctl_inode_operations; 35 36 extern const struct dentry_operations coda_dentry_operations; 37 38 extern const struct address_space_operations coda_file_aops; 39 extern const struct address_space_operations coda_symlink_aops; 40 41 extern const struct file_operations coda_dir_operations; 42 extern const struct file_operations coda_file_operations; 43 extern const struct file_operations coda_ioctl_operations; 44 45 /* operations shared over more than one file */ 46 int coda_open(struct inode *i, struct file *f); 47 int coda_release(struct inode *i, struct file *f); 48 int coda_permission(struct inode *inode, int mask); 49 int coda_revalidate_inode(struct inode *); 50 int coda_getattr(struct vfsmount *, struct dentry *, struct kstat *); 51 int coda_setattr(struct dentry *, struct iattr *); 52 53 /* this file: heloers */ 54 char *coda_f2s(struct CodaFid *f); 55 int coda_isroot(struct inode *i); 56 int coda_iscontrol(const char *name, size_t length); 57 58 void coda_vattr_to_iattr(struct inode *, struct coda_vattr *); 59 void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *); 60 unsigned short coda_flags_to_cflags(unsigned short); 61 62 /* sysctl.h */ 63 void coda_sysctl_init(void); 64 void coda_sysctl_clean(void); 65 66 #define CODA_ALLOC(ptr, cast, size) do { \ 67 if (size < PAGE_SIZE) \ 68 ptr = kzalloc((unsigned long) size, GFP_KERNEL); \ 69 else \ 70 ptr = (cast)vzalloc((unsigned long) size); \ 71 if (!ptr) \ 72 pr_warn("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \ 73 } while (0) 74 75 76 #define CODA_FREE(ptr,size) \ 77 do { if (size < PAGE_SIZE) kfree((ptr)); else vfree((ptr)); } while (0) 78 79 /* inode to cnode access functions */ 80 81 static inline struct coda_inode_info *ITOC(struct inode *inode) 82 { 83 return list_entry(inode, struct coda_inode_info, vfs_inode); 84 } 85 86 static __inline__ struct CodaFid *coda_i2f(struct inode *inode) 87 { 88 return &(ITOC(inode)->c_fid); 89 } 90 91 static __inline__ char *coda_i2s(struct inode *inode) 92 { 93 return coda_f2s(&(ITOC(inode)->c_fid)); 94 } 95 96 /* this will not zap the inode away */ 97 static __inline__ void coda_flag_inode(struct inode *inode, int flag) 98 { 99 struct coda_inode_info *cii = ITOC(inode); 100 101 spin_lock(&cii->c_lock); 102 cii->c_flags |= flag; 103 spin_unlock(&cii->c_lock); 104 } 105 106 #endif 107