1/*
2 * Inode operations for Coda filesystem
3 * Original version: (C) 1996 P. Braam and M. Callahan
4 * Rewritten for Linux 2.1. (C) 1997 Carnegie Mellon University
5 *
6 * Carnegie Mellon encourages users to contribute improvements to
7 * the Coda project. Contact Peter Braam (coda@cs.cmu.edu).
8 */
9
10#include <linux/types.h>
11#include <linux/kernel.h>
12#include <linux/time.h>
13#include <linux/fs.h>
14#include <linux/stat.h>
15#include <linux/errno.h>
16#include <linux/uaccess.h>
17#include <linux/string.h>
18
19#include <linux/coda.h>
20#include <linux/coda_psdev.h>
21#include "coda_linux.h"
22
23/* initialize the debugging variables */
24int coda_fake_statfs;
25
26/* print a fid */
27char * coda_f2s(struct CodaFid *f)
28{
29	static char s[60];
30
31 	sprintf(s, "(%08x.%08x.%08x.%08x)", f->opaque[0], f->opaque[1], f->opaque[2], f->opaque[3]);
32
33	return s;
34}
35
36/* recognize special .CONTROL name */
37int coda_iscontrol(const char *name, size_t length)
38{
39	return ((CODA_CONTROLLEN == length) &&
40                (strncmp(name, CODA_CONTROL, CODA_CONTROLLEN) == 0));
41}
42
43unsigned short coda_flags_to_cflags(unsigned short flags)
44{
45	unsigned short coda_flags = 0;
46
47	if ((flags & O_ACCMODE) == O_RDONLY)
48		coda_flags |= C_O_READ;
49
50	if ((flags & O_ACCMODE) == O_RDWR)
51		coda_flags |= C_O_READ | C_O_WRITE;
52
53	if ((flags & O_ACCMODE) == O_WRONLY)
54		coda_flags |= C_O_WRITE;
55
56	if (flags & O_TRUNC)
57		coda_flags |= C_O_TRUNC;
58
59	if (flags & O_CREAT)
60		coda_flags |= C_O_CREAT;
61
62	if (flags & O_EXCL)
63		coda_flags |= C_O_EXCL;
64
65	return coda_flags;
66}
67
68
69/* utility functions below */
70void coda_vattr_to_iattr(struct inode *inode, struct coda_vattr *attr)
71{
72        int inode_type;
73        /* inode's i_flags, i_ino are set by iget
74           XXX: is this all we need ??
75           */
76        switch (attr->va_type) {
77        case C_VNON:
78                inode_type  = 0;
79                break;
80        case C_VREG:
81                inode_type = S_IFREG;
82                break;
83        case C_VDIR:
84                inode_type = S_IFDIR;
85                break;
86        case C_VLNK:
87                inode_type = S_IFLNK;
88                break;
89        default:
90                inode_type = 0;
91        }
92	inode->i_mode |= inode_type;
93
94	if (attr->va_mode != (u_short) -1)
95	        inode->i_mode = attr->va_mode | inode_type;
96        if (attr->va_uid != -1)
97	        inode->i_uid = make_kuid(&init_user_ns, (uid_t) attr->va_uid);
98        if (attr->va_gid != -1)
99	        inode->i_gid = make_kgid(&init_user_ns, (gid_t) attr->va_gid);
100	if (attr->va_nlink != -1)
101		set_nlink(inode, attr->va_nlink);
102	if (attr->va_size != -1)
103	        inode->i_size = attr->va_size;
104	if (attr->va_size != -1)
105		inode->i_blocks = (attr->va_size + 511) >> 9;
106	if (attr->va_atime.tv_sec != -1)
107	        inode->i_atime = attr->va_atime;
108	if (attr->va_mtime.tv_sec != -1)
109	        inode->i_mtime = attr->va_mtime;
110        if (attr->va_ctime.tv_sec != -1)
111	        inode->i_ctime = attr->va_ctime;
112}
113
114
115/*
116 * BSD sets attributes that need not be modified to -1.
117 * Linux uses the valid field to indicate what should be
118 * looked at.  The BSD type field needs to be deduced from linux
119 * mode.
120 * So we have to do some translations here.
121 */
122
123void coda_iattr_to_vattr(struct iattr *iattr, struct coda_vattr *vattr)
124{
125        unsigned int valid;
126
127        /* clean out */
128	vattr->va_mode = -1;
129        vattr->va_uid = (vuid_t) -1;
130        vattr->va_gid = (vgid_t) -1;
131        vattr->va_size = (off_t) -1;
132	vattr->va_atime.tv_sec = (time_t) -1;
133	vattr->va_atime.tv_nsec =  (time_t) -1;
134        vattr->va_mtime.tv_sec = (time_t) -1;
135        vattr->va_mtime.tv_nsec = (time_t) -1;
136	vattr->va_ctime.tv_sec = (time_t) -1;
137	vattr->va_ctime.tv_nsec = (time_t) -1;
138        vattr->va_type = C_VNON;
139	vattr->va_fileid = -1;
140	vattr->va_gen = -1;
141	vattr->va_bytes = -1;
142	vattr->va_nlink = -1;
143	vattr->va_blocksize = -1;
144	vattr->va_rdev = -1;
145        vattr->va_flags = 0;
146
147        /* determine the type */
148#if 0
149        mode = iattr->ia_mode;
150                if ( S_ISDIR(mode) ) {
151                vattr->va_type = C_VDIR;
152        } else if ( S_ISREG(mode) ) {
153                vattr->va_type = C_VREG;
154        } else if ( S_ISLNK(mode) ) {
155                vattr->va_type = C_VLNK;
156        } else {
157                /* don't do others */
158                vattr->va_type = C_VNON;
159        }
160#endif
161
162        /* set those vattrs that need change */
163        valid = iattr->ia_valid;
164        if ( valid & ATTR_MODE ) {
165                vattr->va_mode = iattr->ia_mode;
166	}
167        if ( valid & ATTR_UID ) {
168                vattr->va_uid = (vuid_t) from_kuid(&init_user_ns, iattr->ia_uid);
169	}
170        if ( valid & ATTR_GID ) {
171                vattr->va_gid = (vgid_t) from_kgid(&init_user_ns, iattr->ia_gid);
172	}
173        if ( valid & ATTR_SIZE ) {
174                vattr->va_size = iattr->ia_size;
175	}
176        if ( valid & ATTR_ATIME ) {
177                vattr->va_atime = iattr->ia_atime;
178	}
179        if ( valid & ATTR_MTIME ) {
180                vattr->va_mtime = iattr->ia_mtime;
181	}
182        if ( valid & ATTR_CTIME ) {
183                vattr->va_ctime = iattr->ia_ctime;
184	}
185}
186
187