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 #ifdef pr_fmt
16 #undef pr_fmt
17 #endif
18
19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
20
21 #include <linux/kernel.h>
22 #include <linux/param.h>
23 #include <linux/mm.h>
24 #include <linux/vmalloc.h>
25 #include <linux/slab.h>
26 #include <linux/wait.h>
27 #include <linux/types.h>
28 #include <linux/fs.h>
29 #include "coda_fs_i.h"
30
31 /* operations */
32 extern const struct inode_operations coda_dir_inode_operations;
33 extern const struct inode_operations coda_file_inode_operations;
34 extern const struct inode_operations coda_ioctl_inode_operations;
35
36 extern const struct dentry_operations coda_dentry_operations;
37
38 extern const struct address_space_operations coda_file_aops;
39 extern const struct address_space_operations coda_symlink_aops;
40
41 extern const struct file_operations coda_dir_operations;
42 extern const struct file_operations coda_file_operations;
43 extern const struct file_operations coda_ioctl_operations;
44
45 /* operations shared over more than one file */
46 int coda_open(struct inode *i, struct file *f);
47 int coda_release(struct inode *i, struct file *f);
48 int coda_permission(struct inode *inode, int mask);
49 int coda_revalidate_inode(struct inode *);
50 int coda_getattr(struct vfsmount *, struct dentry *, struct kstat *);
51 int coda_setattr(struct dentry *, struct iattr *);
52
53 /* this file: heloers */
54 char *coda_f2s(struct CodaFid *f);
55 int coda_iscontrol(const char *name, size_t length);
56
57 void coda_vattr_to_iattr(struct inode *, struct coda_vattr *);
58 void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *);
59 unsigned short coda_flags_to_cflags(unsigned short);
60
61 /* sysctl.h */
62 void coda_sysctl_init(void);
63 void coda_sysctl_clean(void);
64
65 #define CODA_ALLOC(ptr, cast, size) do { \
66 if (size < PAGE_SIZE) \
67 ptr = kzalloc((unsigned long) size, GFP_KERNEL); \
68 else \
69 ptr = (cast)vzalloc((unsigned long) size); \
70 if (!ptr) \
71 pr_warn("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \
72 } while (0)
73
74
75 #define CODA_FREE(ptr,size) \
76 do { if (size < PAGE_SIZE) kfree((ptr)); else vfree((ptr)); } while (0)
77
78 /* inode to cnode access functions */
79
ITOC(struct inode * inode)80 static inline struct coda_inode_info *ITOC(struct inode *inode)
81 {
82 return container_of(inode, struct coda_inode_info, vfs_inode);
83 }
84
coda_i2f(struct inode * inode)85 static __inline__ struct CodaFid *coda_i2f(struct inode *inode)
86 {
87 return &(ITOC(inode)->c_fid);
88 }
89
coda_i2s(struct inode * inode)90 static __inline__ char *coda_i2s(struct inode *inode)
91 {
92 return coda_f2s(&(ITOC(inode)->c_fid));
93 }
94
95 /* this will not zap the inode away */
coda_flag_inode(struct inode * inode,int flag)96 static __inline__ void coda_flag_inode(struct inode *inode, int flag)
97 {
98 struct coda_inode_info *cii = ITOC(inode);
99
100 spin_lock(&cii->c_lock);
101 cii->c_flags |= flag;
102 spin_unlock(&cii->c_lock);
103 }
104
105 #endif
106