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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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