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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 <asm/uaccess.h>
17#include <linux/string.h>
18
19#include <linux/coda.h>
20#include <linux/coda_linux.h>
21#include <linux/coda_psdev.h>
22#include <linux/coda_fs_i.h>
23
24/* initialize the debugging variables */
25int coda_fake_statfs;
26
27/* print a fid */
28char * coda_f2s(struct CodaFid *f)
29{
30 static char s[60];
Adrian Bunkde0ca062008-07-25 01:46:34 -070031
Linus Torvalds1da177e2005-04-16 15:20:36 -070032 sprintf(s, "(%08x.%08x.%08x.%08x)", f->opaque[0], f->opaque[1], f->opaque[2], f->opaque[3]);
Adrian Bunkde0ca062008-07-25 01:46:34 -070033
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 return s;
35}
36
37/* recognize special .CONTROL name */
38int coda_iscontrol(const char *name, size_t length)
39{
40 return ((CODA_CONTROLLEN == length) &&
41 (strncmp(name, CODA_CONTROL, CODA_CONTROLLEN) == 0));
42}
43
44/* recognize /coda inode */
45int coda_isroot(struct inode *i)
46{
47 return ( i->i_sb->s_root->d_inode == i );
48}
49
50unsigned short coda_flags_to_cflags(unsigned short flags)
51{
52 unsigned short coda_flags = 0;
53
54 if ((flags & O_ACCMODE) == O_RDONLY)
55 coda_flags |= C_O_READ;
56
57 if ((flags & O_ACCMODE) == O_RDWR)
58 coda_flags |= C_O_READ | C_O_WRITE;
59
60 if ((flags & O_ACCMODE) == O_WRONLY)
61 coda_flags |= C_O_WRITE;
62
63 if (flags & O_TRUNC)
64 coda_flags |= C_O_TRUNC;
65
66 if (flags & O_CREAT)
67 coda_flags |= C_O_CREAT;
68
69 if (flags & O_EXCL)
70 coda_flags |= C_O_EXCL;
71
72 return coda_flags;
73}
74
75
76/* utility functions below */
77void coda_vattr_to_iattr(struct inode *inode, struct coda_vattr *attr)
78{
79 int inode_type;
80 /* inode's i_flags, i_ino are set by iget
81 XXX: is this all we need ??
82 */
83 switch (attr->va_type) {
84 case C_VNON:
85 inode_type = 0;
86 break;
87 case C_VREG:
88 inode_type = S_IFREG;
89 break;
90 case C_VDIR:
91 inode_type = S_IFDIR;
92 break;
93 case C_VLNK:
94 inode_type = S_IFLNK;
95 break;
96 default:
97 inode_type = 0;
98 }
99 inode->i_mode |= inode_type;
100
101 if (attr->va_mode != (u_short) -1)
102 inode->i_mode = attr->va_mode | inode_type;
103 if (attr->va_uid != -1)
104 inode->i_uid = (uid_t) attr->va_uid;
105 if (attr->va_gid != -1)
106 inode->i_gid = (gid_t) attr->va_gid;
107 if (attr->va_nlink != -1)
108 inode->i_nlink = attr->va_nlink;
109 if (attr->va_size != -1)
110 inode->i_size = attr->va_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 if (attr->va_size != -1)
112 inode->i_blocks = (attr->va_size + 511) >> 9;
113 if (attr->va_atime.tv_sec != -1)
114 inode->i_atime = attr->va_atime;
115 if (attr->va_mtime.tv_sec != -1)
116 inode->i_mtime = attr->va_mtime;
117 if (attr->va_ctime.tv_sec != -1)
118 inode->i_ctime = attr->va_ctime;
119}
120
121
122/*
123 * BSD sets attributes that need not be modified to -1.
124 * Linux uses the valid field to indicate what should be
125 * looked at. The BSD type field needs to be deduced from linux
126 * mode.
127 * So we have to do some translations here.
128 */
129
130void coda_iattr_to_vattr(struct iattr *iattr, struct coda_vattr *vattr)
131{
132 unsigned int valid;
133
134 /* clean out */
Andrew Mortona2d416d2008-04-29 00:59:22 -0700135 vattr->va_mode = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 vattr->va_uid = (vuid_t) -1;
137 vattr->va_gid = (vgid_t) -1;
138 vattr->va_size = (off_t) -1;
139 vattr->va_atime.tv_sec = (time_t) -1;
140 vattr->va_atime.tv_nsec = (time_t) -1;
141 vattr->va_mtime.tv_sec = (time_t) -1;
142 vattr->va_mtime.tv_nsec = (time_t) -1;
143 vattr->va_ctime.tv_sec = (time_t) -1;
144 vattr->va_ctime.tv_nsec = (time_t) -1;
145 vattr->va_type = C_VNON;
146 vattr->va_fileid = -1;
147 vattr->va_gen = -1;
148 vattr->va_bytes = -1;
149 vattr->va_nlink = -1;
150 vattr->va_blocksize = -1;
151 vattr->va_rdev = -1;
152 vattr->va_flags = 0;
153
154 /* determine the type */
155#if 0
156 mode = iattr->ia_mode;
157 if ( S_ISDIR(mode) ) {
158 vattr->va_type = C_VDIR;
159 } else if ( S_ISREG(mode) ) {
160 vattr->va_type = C_VREG;
161 } else if ( S_ISLNK(mode) ) {
162 vattr->va_type = C_VLNK;
163 } else {
164 /* don't do others */
165 vattr->va_type = C_VNON;
166 }
167#endif
168
169 /* set those vattrs that need change */
170 valid = iattr->ia_valid;
171 if ( valid & ATTR_MODE ) {
172 vattr->va_mode = iattr->ia_mode;
173 }
174 if ( valid & ATTR_UID ) {
175 vattr->va_uid = (vuid_t) iattr->ia_uid;
176 }
177 if ( valid & ATTR_GID ) {
178 vattr->va_gid = (vgid_t) iattr->ia_gid;
179 }
180 if ( valid & ATTR_SIZE ) {
181 vattr->va_size = iattr->ia_size;
182 }
183 if ( valid & ATTR_ATIME ) {
184 vattr->va_atime = iattr->ia_atime;
185 }
186 if ( valid & ATTR_MTIME ) {
187 vattr->va_mtime = iattr->ia_mtime;
188 }
189 if ( valid & ATTR_CTIME ) {
190 vattr->va_ctime = iattr->ia_ctime;
191 }
192}
193