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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 <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];
31#ifdef CONFIG_CODA_FS_OLD_API
32 sprintf(s, "(%08x.%08x.%08x)", f->opaque[0], f->opaque[1], f->opaque[2]);
33#else
34 sprintf(s, "(%08x.%08x.%08x.%08x)", f->opaque[0], f->opaque[1], f->opaque[2], f->opaque[3]);
35#endif
36 return s;
37}
38
39/* recognize special .CONTROL name */
40int coda_iscontrol(const char *name, size_t length)
41{
42 return ((CODA_CONTROLLEN == length) &&
43 (strncmp(name, CODA_CONTROL, CODA_CONTROLLEN) == 0));
44}
45
46/* recognize /coda inode */
47int coda_isroot(struct inode *i)
48{
49 return ( i->i_sb->s_root->d_inode == i );
50}
51
52unsigned short coda_flags_to_cflags(unsigned short flags)
53{
54 unsigned short coda_flags = 0;
55
56 if ((flags & O_ACCMODE) == O_RDONLY)
57 coda_flags |= C_O_READ;
58
59 if ((flags & O_ACCMODE) == O_RDWR)
60 coda_flags |= C_O_READ | C_O_WRITE;
61
62 if ((flags & O_ACCMODE) == O_WRONLY)
63 coda_flags |= C_O_WRITE;
64
65 if (flags & O_TRUNC)
66 coda_flags |= C_O_TRUNC;
67
68 if (flags & O_CREAT)
69 coda_flags |= C_O_CREAT;
70
71 if (flags & O_EXCL)
72 coda_flags |= C_O_EXCL;
73
74 return coda_flags;
75}
76
77
78/* utility functions below */
79void coda_vattr_to_iattr(struct inode *inode, struct coda_vattr *attr)
80{
81 int inode_type;
82 /* inode's i_flags, i_ino are set by iget
83 XXX: is this all we need ??
84 */
85 switch (attr->va_type) {
86 case C_VNON:
87 inode_type = 0;
88 break;
89 case C_VREG:
90 inode_type = S_IFREG;
91 break;
92 case C_VDIR:
93 inode_type = S_IFDIR;
94 break;
95 case C_VLNK:
96 inode_type = S_IFLNK;
97 break;
98 default:
99 inode_type = 0;
100 }
101 inode->i_mode |= inode_type;
102
103 if (attr->va_mode != (u_short) -1)
104 inode->i_mode = attr->va_mode | inode_type;
105 if (attr->va_uid != -1)
106 inode->i_uid = (uid_t) attr->va_uid;
107 if (attr->va_gid != -1)
108 inode->i_gid = (gid_t) attr->va_gid;
109 if (attr->va_nlink != -1)
110 inode->i_nlink = attr->va_nlink;
111 if (attr->va_size != -1)
112 inode->i_size = attr->va_size;
113 if (attr->va_size != -1)
114 inode->i_blocks = (attr->va_size + 511) >> 9;
115 if (attr->va_atime.tv_sec != -1)
116 inode->i_atime = attr->va_atime;
117 if (attr->va_mtime.tv_sec != -1)
118 inode->i_mtime = attr->va_mtime;
119 if (attr->va_ctime.tv_sec != -1)
120 inode->i_ctime = attr->va_ctime;
121}
122
123
124/*
125 * BSD sets attributes that need not be modified to -1.
126 * Linux uses the valid field to indicate what should be
127 * looked at. The BSD type field needs to be deduced from linux
128 * mode.
129 * So we have to do some translations here.
130 */
131
132void coda_iattr_to_vattr(struct iattr *iattr, struct coda_vattr *vattr)
133{
134 unsigned int valid;
135
136 /* clean out */
137 vattr->va_mode = -1;
138 vattr->va_uid = (vuid_t) -1;
139 vattr->va_gid = (vgid_t) -1;
140 vattr->va_size = (off_t) -1;
141 vattr->va_atime.tv_sec = (time_t) -1;
142 vattr->va_atime.tv_nsec = (time_t) -1;
143 vattr->va_mtime.tv_sec = (time_t) -1;
144 vattr->va_mtime.tv_nsec = (time_t) -1;
145 vattr->va_ctime.tv_sec = (time_t) -1;
146 vattr->va_ctime.tv_nsec = (time_t) -1;
147 vattr->va_type = C_VNON;
148 vattr->va_fileid = -1;
149 vattr->va_gen = -1;
150 vattr->va_bytes = -1;
151 vattr->va_nlink = -1;
152 vattr->va_blocksize = -1;
153 vattr->va_rdev = -1;
154 vattr->va_flags = 0;
155
156 /* determine the type */
157#if 0
158 mode = iattr->ia_mode;
159 if ( S_ISDIR(mode) ) {
160 vattr->va_type = C_VDIR;
161 } else if ( S_ISREG(mode) ) {
162 vattr->va_type = C_VREG;
163 } else if ( S_ISLNK(mode) ) {
164 vattr->va_type = C_VLNK;
165 } else {
166 /* don't do others */
167 vattr->va_type = C_VNON;
168 }
169#endif
170
171 /* set those vattrs that need change */
172 valid = iattr->ia_valid;
173 if ( valid & ATTR_MODE ) {
174 vattr->va_mode = iattr->ia_mode;
175 }
176 if ( valid & ATTR_UID ) {
177 vattr->va_uid = (vuid_t) iattr->ia_uid;
178 }
179 if ( valid & ATTR_GID ) {
180 vattr->va_gid = (vgid_t) iattr->ia_gid;
181 }
182 if ( valid & ATTR_SIZE ) {
183 vattr->va_size = iattr->ia_size;
184 }
185 if ( valid & ATTR_ATIME ) {
186 vattr->va_atime = iattr->ia_atime;
187 }
188 if ( valid & ATTR_MTIME ) {
189 vattr->va_mtime = iattr->ia_mtime;
190 }
191 if ( valid & ATTR_CTIME ) {
192 vattr->va_ctime = iattr->ia_ctime;
193 }
194}
195