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