fs/coda/coda_linux.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Coda File System, Linux Kernel module
   4  *
   5  * Original version, adapted from cfs_mach.c, (C) Carnegie Mellon University
   6  * Linux modifications (C) 1996, Peter J. Braam
   7  * Rewritten for Linux 2.1 (C) 1997 Carnegie Mellon University
   8  *
   9  * Carnegie Mellon University encourages users of this software to
  10  * contribute improvements to the Coda project.
  11  */
  12
  13 #ifndef _LINUX_CODA_FS
  14 #define _LINUX_CODA_FS
  15
  16 #ifdef pr_fmt
  17 #undef pr_fmt
  18 #endif
  19
  20 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  21
  22 #include <linux/kernel.h>
  23 #include <linux/param.h>
  24 #include <linux/mm.h>
  25 #include <linux/vmalloc.h>
  26 #include <linux/slab.h>
  27 #include <linux/wait.h>
  28 #include <linux/types.h>
  29 #include <linux/fs.h>
  30 #include "coda_fs_i.h"
  31
  32 /* operations */
  33 extern const struct inode_operations coda_dir_inode_operations;
  34 extern const struct inode_operations coda_file_inode_operations;
  35 extern const struct inode_operations coda_ioctl_inode_operations;
  36
  37 extern const struct dentry_operations coda_dentry_operations;
  38
  39 extern const struct address_space_operations coda_file_aops;
  40 extern const struct address_space_operations coda_symlink_aops;
  41
  42 extern const struct file_operations coda_dir_operations;
  43 extern const struct file_operations coda_file_operations;
  44 extern const struct file_operations coda_ioctl_operations;
  45
  46 /* operations shared over more than one file */
  47 int coda_open(struct inode *i, struct file *f);
  48 int coda_release(struct inode *i, struct file *f);
  49 int coda_permission(struct inode *inode, int mask);
  50 int coda_revalidate_inode(struct inode *);
  51 int coda_getattr(const struct path *, struct kstat *, u32, unsigned int);
  52 int coda_setattr(struct dentry *, struct iattr *);
  53
  54 /* this file:  heloers */
  55 char *coda_f2s(struct CodaFid *f);
  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) kvfree((ptr))
  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