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_iscontrol(const char *name, size_t length); 56 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 61 /* sysctl.h */ 62 void coda_sysctl_init(void); 63 void 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 80 static inline struct coda_inode_info *ITOC(struct inode *inode) 81 { 82 return container_of(inode, struct coda_inode_info, vfs_inode); 83 } 84 85 static __inline__ struct CodaFid *coda_i2f(struct inode *inode) 86 { 87 return &(ITOC(inode)->c_fid); 88 } 89 90 static __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 */ 96 static __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