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/sched.h>
18 #include <linux/mm.h>
19 #include <linux/vmalloc.h>
20 #include <linux/slab.h>
21 #include <linux/wait.h>
22 #include <linux/types.h>
23 #include <linux/fs.h>
24 #include <linux/coda_fs_i.h>
25
26 /* operations */
27 extern struct inode_operations coda_dir_inode_operations;
28 extern struct inode_operations coda_file_inode_operations;
29 extern struct inode_operations coda_ioctl_inode_operations;
30
31 extern struct address_space_operations coda_file_aops;
32 extern struct address_space_operations coda_symlink_aops;
33
34 extern struct file_operations coda_dir_operations;
35 extern struct file_operations coda_file_operations;
36 extern struct file_operations coda_ioctl_operations;
37
38 /* operations shared over more than one file */
39 int coda_open(struct inode *i, struct file *f);
40 int coda_flush(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_notify_change(struct dentry *, struct iattr *);
45 int coda_isnullfid(ViceFid *fid);
46
47 /* global variables */
48 extern int coda_debug;
49 extern int coda_access_cache;
50 extern int coda_fake_statfs;
51
52 /* this file: heloers */
53 static __inline__ struct ViceFid *coda_i2f(struct inode *);
54 static __inline__ char *coda_i2s(struct inode *);
55 static __inline__ void coda_flag_inode(struct inode *, int flag);
56 char *coda_f2s(ViceFid *f);
57 int coda_isroot(struct inode *i);
58 int coda_iscontrol(const char *name, size_t length);
59
60 void coda_load_creds(struct coda_cred *cred);
61 void coda_vattr_to_iattr(struct inode *, struct coda_vattr *);
62 void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *);
63 unsigned short coda_flags_to_cflags(unsigned short);
64 void print_vattr( struct coda_vattr *attr );
65 int coda_cred_ok(struct coda_cred *cred);
66 int coda_cred_eq(struct coda_cred *cred1, struct coda_cred *cred2);
67
68 /* sysctl.h */
69 void coda_sysctl_init(void);
70 void coda_sysctl_clean(void);
71
72
73 /* debugging masks */
74 #define D_SUPER 1 /* print results returned by Venus */
75 #define D_INODE 2 /* print entry and exit into procedure */
76 #define D_FILE 4
77 #define D_CACHE 8 /* cache debugging */
78 #define D_MALLOC 16 /* print malloc, de-alloc information */
79 #define D_CNODE 32
80 #define D_UPCALL 64 /* up and downcall debugging */
81 #define D_PSDEV 128
82 #define D_PIOCTL 256
83 #define D_SPECIAL 512
84 #define D_TIMING 1024
85 #define D_DOWNCALL 2048
86
87 #define CDEBUG(mask, format, a...) \
88 do { \
89 if (coda_debug & mask) { \
90 printk("(%s,l. %d): ", __FUNCTION__, __LINE__); \
91 printk(format, ## a); } \
92 } while (0)
93
94 #define CODA_ALLOC(ptr, cast, size) do { \
95 if (size < PAGE_SIZE) \
96 ptr = (cast)kmalloc((unsigned long) size, GFP_KERNEL); \
97 else \
98 ptr = (cast)vmalloc((unsigned long) size); \
99 if (!ptr) \
100 printk("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \
101 else memset( ptr, 0, size ); \
102 } while (0)
103
104
105 #define CODA_FREE(ptr,size) \
106 do { if (size < PAGE_SIZE) kfree((ptr)); else vfree((ptr)); } while (0)
107
108 /* inode to cnode access functions */
109
110 #define ITOC(inode) (&((inode)->u.coda_i))
111
coda_i2f(struct inode * inode)112 static __inline__ struct ViceFid *coda_i2f(struct inode *inode)
113 {
114 return &(ITOC(inode)->c_fid);
115 }
116
coda_i2s(struct inode * inode)117 static __inline__ char *coda_i2s(struct inode *inode)
118 {
119 return coda_f2s(&(ITOC(inode)->c_fid));
120 }
121
122 /* this will not zap the inode away */
coda_flag_inode(struct inode * inode,int flag)123 static __inline__ void coda_flag_inode(struct inode *inode, int flag)
124 {
125 ITOC(inode)->c_flags |= flag;
126 }
127
128 #endif
129