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/malloc.h>
21 #include <linux/wait.h>
22 #include <linux/types.h>
23 #include <linux/fs.h>
24
25 /* operations */
26 extern struct inode_operations coda_dir_inode_operations;
27 extern struct inode_operations coda_file_inode_operations;
28 extern struct inode_operations coda_ioctl_inode_operations;
29
30 extern struct address_space_operations coda_file_aops;
31 extern struct address_space_operations coda_symlink_aops;
32
33 extern struct file_operations coda_dir_operations;
34 extern struct file_operations coda_file_operations;
35 extern 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_notify_change(struct dentry *, struct iattr *);
43
44 /* global variables */
45 extern int coda_debug;
46 extern int coda_print_entry;
47 extern int coda_access_cache;
48
49 /* this file: heloers */
50 static __inline__ struct ViceFid *coda_i2f(struct inode *);
51 static __inline__ char *coda_i2s(struct inode *);
52 static __inline__ void coda_flag_inode(struct inode *, int flag);
53 char *coda_f2s(ViceFid *f);
54 char *coda_f2s2(ViceFid *f);
55 int coda_isroot(struct inode *i);
56 int coda_fid_is_volroot(struct ViceFid *);
57 int coda_fid_is_weird(struct ViceFid *fid);
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 /* cache.c */
69 void coda_purge_children(struct inode *, int);
70 void coda_purge_dentries(struct inode *);
71
72 /* sysctl.h */
73 void coda_sysctl_init(void);
74 void coda_sysctl_clean(void);
75
76
77 /* debugging masks */
78 #define D_SUPER 1 /* print results returned by Venus */
79 #define D_INODE 2 /* print entry and exit into procedure */
80 #define D_FILE 4
81 #define D_CACHE 8 /* cache debugging */
82 #define D_MALLOC 16 /* print malloc, de-alloc information */
83 #define D_CNODE 32
84 #define D_UPCALL 64 /* up and downcall debugging */
85 #define D_PSDEV 128
86 #define D_PIOCTL 256
87 #define D_SPECIAL 512
88 #define D_TIMING 1024
89 #define D_DOWNCALL 2048
90
91 #define CDEBUG(mask, format, a...) \
92 do { \
93 if (coda_debug & mask) { \
94 printk("(%s,l. %d): ", __FUNCTION__, __LINE__); \
95 printk(format, ## a); } \
96 } while (0)
97
98 #define ENTRY \
99 if(coda_print_entry) printk("Process %d entered %s\n",current->pid,__FUNCTION__)
100
101 #define EXIT \
102 if(coda_print_entry) printk("Process %d leaving %s\n",current->pid,__FUNCTION__)
103
104 #define CODA_ALLOC(ptr, cast, size) \
105 do { \
106 if (size < PAGE_SIZE) { \
107 ptr = (cast)kmalloc((unsigned long) size, GFP_KERNEL); \
108 CDEBUG(D_MALLOC, "kmalloced: %lx at %p.\n", (long)size, ptr); \
109 } else { \
110 ptr = (cast)vmalloc((unsigned long) size); \
111 CDEBUG(D_MALLOC, "vmalloced: %lx at %p .\n", (long)size, ptr);} \
112 if (ptr == 0) { \
113 printk("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \
114 } \
115 else memset( ptr, 0, size ); \
116 } while (0)
117
118
119 #define CODA_FREE(ptr,size) do {if (size < PAGE_SIZE) { kfree((ptr)); CDEBUG(D_MALLOC, "kfreed: %lx at %p.\n", (long) size, ptr); } else { vfree((ptr)); CDEBUG(D_MALLOC, "vfreed: %lx at %p.\n", (long) size, ptr);} } while (0)
120
121 /* inode to cnode access functions */
122
123 static __inline__ struct ViceFid *coda_i2f(struct inode *inode)
124 {
125 return &(inode->u.coda_i.c_fid);
126 }
127
128 static __inline__ char *coda_i2s(struct inode *inode)
129 {
130 return coda_f2s(&(inode->u.coda_i.c_fid));
131 }
132
133 /* this will not zap the inode away */
134 static __inline__ void coda_flag_inode(struct inode *inode, int flag)
135 {
136 inode->u.coda_i.c_flags |= flag;
137 }
138
139 #define ITOC(inode) (&((inode)->u.coda_i))
140
141 #endif
142
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