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);
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 = kzalloc((unsigned long) size, GFP_KERNEL); \
63 else \
64 ptr = (cast)vzalloc((unsigned long) size); \
65 if (!ptr) \
66 printk("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \
67 } while (0)
68
69
70 #define CODA_FREE(ptr,size) \
71 do { if (size < PAGE_SIZE) kfree((ptr)); else vfree((ptr)); } while (0)
72
73 /* inode to cnode access functions */
74
ITOC(struct inode * inode)75 static inline struct coda_inode_info *ITOC(struct inode *inode)
76 {
77 return list_entry(inode, struct coda_inode_info, vfs_inode);
78 }
79
coda_i2f(struct inode * inode)80 static __inline__ struct CodaFid *coda_i2f(struct inode *inode)
81 {
82 return &(ITOC(inode)->c_fid);
83 }
84
coda_i2s(struct inode * inode)85 static __inline__ char *coda_i2s(struct inode *inode)
86 {
87 return coda_f2s(&(ITOC(inode)->c_fid));
88 }
89
90 /* this will not zap the inode away */
coda_flag_inode(struct inode * inode,int flag)91 static __inline__ void coda_flag_inode(struct inode *inode, int flag)
92 {
93 struct coda_inode_info *cii = ITOC(inode);
94
95 spin_lock(&cii->c_lock);
96 cii->c_flags |= flag;
97 spin_unlock(&cii->c_lock);
98 }
99
100 #endif
101