fs/coda/coda_linux.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 /*
0003  * Coda File System, Linux Kernel module
0004  *
0005  * Original version, adapted from cfs_mach.c, (C) Carnegie Mellon University
0006  * Linux modifications (C) 1996, Peter J. Braam
0007  * Rewritten for Linux 2.1 (C) 1997 Carnegie Mellon University
0008  *
0009  * Carnegie Mellon University encourages users of this software to
0010  * contribute improvements to the Coda project.
0011  */
0012
0013 #ifndef _LINUX_CODA_FS
0014 #define _LINUX_CODA_FS
0015
0016 #ifdef pr_fmt
0017 #undef pr_fmt
0018 #endif
0019
0020 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
0021
0022 #include <linux/kernel.h>
0023 #include <linux/param.h>
0024 #include <linux/mm.h>
0025 #include <linux/vmalloc.h>
0026 #include <linux/slab.h>
0027 #include <linux/wait.h>
0028 #include <linux/types.h>
0029 #include <linux/fs.h>
0030 #include "coda_fs_i.h"
0031
0032 /* operations */
0033 extern const struct inode_operations coda_dir_inode_operations;
0034 extern const struct inode_operations coda_file_inode_operations;
0035 extern const struct inode_operations coda_ioctl_inode_operations;
0036
0037 extern const struct dentry_operations coda_dentry_operations;
0038
0039 extern const struct address_space_operations coda_file_aops;
0040 extern const struct address_space_operations coda_symlink_aops;
0041
0042 extern const struct file_operations coda_dir_operations;
0043 extern const struct file_operations coda_file_operations;
0044 extern const struct file_operations coda_ioctl_operations;
0045
0046 /* operations shared over more than one file */
0047 int coda_open(struct inode *i, struct file *f);
0048 int coda_release(struct inode *i, struct file *f);
0049 int coda_permission(struct user_namespace *mnt_userns, struct inode *inode,
0050             int mask);
0051 int coda_revalidate_inode(struct inode *);
0052 int coda_getattr(struct user_namespace *, const struct path *, struct kstat *,
0053          u32, unsigned int);
0054 int coda_setattr(struct user_namespace *, struct dentry *, struct iattr *);
0055
0056 /* this file:  helpers */
0057 char *coda_f2s(struct CodaFid *f);
0058 int coda_iscontrol(const char *name, size_t length);
0059
0060 umode_t coda_inode_type(struct coda_vattr *attr);
0061 void coda_vattr_to_iattr(struct inode *, struct coda_vattr *);
0062 void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *);
0063 unsigned short coda_flags_to_cflags(unsigned short);
0064
0065 /* inode to cnode access functions */
0066
0067 static inline struct coda_inode_info *ITOC(struct inode *inode)
0068 {
0069     return container_of(inode, struct coda_inode_info, vfs_inode);
0070 }
0071
0072 static __inline__ struct CodaFid *coda_i2f(struct inode *inode)
0073 {
0074     return &(ITOC(inode)->c_fid);
0075 }
0076
0077 static __inline__ char *coda_i2s(struct inode *inode)
0078 {
0079     return coda_f2s(&(ITOC(inode)->c_fid));
0080 }
0081
0082 /* this will not zap the inode away */
0083 static __inline__ void coda_flag_inode(struct inode *inode, int flag)
0084 {
0085     struct coda_inode_info *cii = ITOC(inode);
0086
0087     if (!inode)
0088         return;
0089
0090     spin_lock(&cii->c_lock);
0091     cii->c_flags |= flag;
0092     spin_unlock(&cii->c_lock);
0093 }
0094
0095 #endif