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);
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 char *coda_f2s(struct CodaFid *f);
47 int coda_isroot(struct inode *i);
48 int coda_iscontrol(const char *name, size_t length);
49
50 void coda_vattr_to_iattr(struct inode *, struct coda_vattr *);
51 void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *);
52 unsigned short coda_flags_to_cflags(unsigned short);
53
54 /* sysctl.h */
55 void coda_sysctl_init(void);
56 void coda_sysctl_clean(void);
57
58 #define CODA_ALLOC(ptr, cast, size) do { \
59 if (size < PAGE_SIZE) \
60 ptr = kmalloc((unsigned long) size, GFP_KERNEL); \
61 else \
62 ptr = (cast)vmalloc((unsigned long) size); \
63 if (!ptr) \
64 printk("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \
65 else memset( ptr, 0, size ); \
66 } while (0)
67
68
69 #define CODA_FREE(ptr,size) \
70 do { if (size < PAGE_SIZE) kfree((ptr)); else vfree((ptr)); } while (0)
71
72 /* inode to cnode access functions */
73
74 static inline struct coda_inode_info *ITOC(struct inode *inode)
75 {
76 return list_entry(inode, struct coda_inode_info, vfs_inode);
77 }
78
79 static __inline__ struct CodaFid *coda_i2f(struct inode *inode)
80 {
81 return &(ITOC(inode)->c_fid);
82 }
83
84 static __inline__ char *coda_i2s(struct inode *inode)
85 {
86 return coda_f2s(&(ITOC(inode)->c_fid));
87 }
88
89 /* this will not zap the inode away */
90 static __inline__ void coda_flag_inode(struct inode *inode, int flag)
91 {
92 ITOC(inode)->c_flags |= flag;
93 }
94
95 #endif
96
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