1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Coda File System, Linux Kernel module
4 *
5 * Original version, adapted from cfs_mach.c, (C) Carnegie Mellon University
6 * Linux modifications (C) 1996, Peter J. Braam
7 * Rewritten for Linux 2.1 (C) 1997 Carnegie Mellon University
8 *
9 * Carnegie Mellon University encourages users of this software to
10 * contribute improvements to the Coda project.
11 */
12
13 #ifndef _LINUX_CODA_FS
14 #define _LINUX_CODA_FS
15
16 #ifdef pr_fmt
17 #undef pr_fmt
18 #endif
19
20 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21
22 #include <linux/kernel.h>
23 #include <linux/param.h>
24 #include <linux/mm.h>
25 #include <linux/vmalloc.h>
26 #include <linux/slab.h>
27 #include <linux/wait.h>
28 #include <linux/types.h>
29 #include <linux/fs.h>
30 #include "coda_fs_i.h"
31
32 /* operations */
33 extern const struct inode_operations coda_dir_inode_operations;
34 extern const struct inode_operations coda_file_inode_operations;
35 extern const struct inode_operations coda_ioctl_inode_operations;
36
37 extern const struct dentry_operations coda_dentry_operations;
38
39 extern const struct address_space_operations coda_file_aops;
40 extern const struct address_space_operations coda_symlink_aops;
41
42 extern const struct file_operations coda_dir_operations;
43 extern const struct file_operations coda_file_operations;
44 extern const struct file_operations coda_ioctl_operations;
45
46 /* operations shared over more than one file */
47 int coda_open(struct inode *i, struct file *f);
48 int coda_release(struct inode *i, struct file *f);
49 int coda_permission(struct inode *inode, int mask);
50 int coda_revalidate_inode(struct inode *);
51 int coda_getattr(const struct path *, struct kstat *, u32, unsigned int);
52 int coda_setattr(struct dentry *, struct iattr *);
53
54 /* this file: heloers */
55 char *coda_f2s(struct CodaFid *f);
56 int coda_iscontrol(const char *name, size_t length);
57
58 void coda_vattr_to_iattr(struct inode *, struct coda_vattr *);
59 void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *);
60 unsigned short coda_flags_to_cflags(unsigned short);
61
62 /* sysctl.h */
63 void coda_sysctl_init(void);
64 void coda_sysctl_clean(void);
65
66 #define CODA_ALLOC(ptr, cast, size) do { \
67 if (size < PAGE_SIZE) \
68 ptr = kzalloc((unsigned long) size, GFP_KERNEL); \
69 else \
70 ptr = (cast)vzalloc((unsigned long) size); \
71 if (!ptr) \
72 pr_warn("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \
73 } while (0)
74
75
76 #define CODA_FREE(ptr, size) kvfree((ptr))
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