diff options
Diffstat (limited to 'fs/coda/coda_linux.c')
-rw-r--r-- | fs/coda/coda_linux.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/fs/coda/coda_linux.c b/fs/coda/coda_linux.c new file mode 100644 index 000000000000..5597080cb811 --- /dev/null +++ b/fs/coda/coda_linux.c | |||
@@ -0,0 +1,197 @@ | |||
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 */ | ||
25 | int coda_fake_statfs; | ||
26 | |||
27 | /* print a fid */ | ||
28 | char * 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 */ | ||
40 | int 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 */ | ||
47 | int coda_isroot(struct inode *i) | ||
48 | { | ||
49 | return ( i->i_sb->s_root->d_inode == i ); | ||
50 | } | ||
51 | |||
52 | unsigned 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 */ | ||
79 | void 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_blocksize != -1) | ||
114 | inode->i_blksize = attr->va_blocksize; | ||
115 | if (attr->va_size != -1) | ||
116 | inode->i_blocks = (attr->va_size + 511) >> 9; | ||
117 | if (attr->va_atime.tv_sec != -1) | ||
118 | inode->i_atime = attr->va_atime; | ||
119 | if (attr->va_mtime.tv_sec != -1) | ||
120 | inode->i_mtime = attr->va_mtime; | ||
121 | if (attr->va_ctime.tv_sec != -1) | ||
122 | inode->i_ctime = attr->va_ctime; | ||
123 | } | ||
124 | |||
125 | |||
126 | /* | ||
127 | * BSD sets attributes that need not be modified to -1. | ||
128 | * Linux uses the valid field to indicate what should be | ||
129 | * looked at. The BSD type field needs to be deduced from linux | ||
130 | * mode. | ||
131 | * So we have to do some translations here. | ||
132 | */ | ||
133 | |||
134 | void coda_iattr_to_vattr(struct iattr *iattr, struct coda_vattr *vattr) | ||
135 | { | ||
136 | unsigned int valid; | ||
137 | |||
138 | /* clean out */ | ||
139 | vattr->va_mode = (umode_t) -1; | ||
140 | vattr->va_uid = (vuid_t) -1; | ||
141 | vattr->va_gid = (vgid_t) -1; | ||
142 | vattr->va_size = (off_t) -1; | ||
143 | vattr->va_atime.tv_sec = (time_t) -1; | ||
144 | vattr->va_atime.tv_nsec = (time_t) -1; | ||
145 | vattr->va_mtime.tv_sec = (time_t) -1; | ||
146 | vattr->va_mtime.tv_nsec = (time_t) -1; | ||
147 | vattr->va_ctime.tv_sec = (time_t) -1; | ||
148 | vattr->va_ctime.tv_nsec = (time_t) -1; | ||
149 | vattr->va_type = C_VNON; | ||
150 | vattr->va_fileid = -1; | ||
151 | vattr->va_gen = -1; | ||
152 | vattr->va_bytes = -1; | ||
153 | vattr->va_nlink = -1; | ||
154 | vattr->va_blocksize = -1; | ||
155 | vattr->va_rdev = -1; | ||
156 | vattr->va_flags = 0; | ||
157 | |||
158 | /* determine the type */ | ||
159 | #if 0 | ||
160 | mode = iattr->ia_mode; | ||
161 | if ( S_ISDIR(mode) ) { | ||
162 | vattr->va_type = C_VDIR; | ||
163 | } else if ( S_ISREG(mode) ) { | ||
164 | vattr->va_type = C_VREG; | ||
165 | } else if ( S_ISLNK(mode) ) { | ||
166 | vattr->va_type = C_VLNK; | ||
167 | } else { | ||
168 | /* don't do others */ | ||
169 | vattr->va_type = C_VNON; | ||
170 | } | ||
171 | #endif | ||
172 | |||
173 | /* set those vattrs that need change */ | ||
174 | valid = iattr->ia_valid; | ||
175 | if ( valid & ATTR_MODE ) { | ||
176 | vattr->va_mode = iattr->ia_mode; | ||
177 | } | ||
178 | if ( valid & ATTR_UID ) { | ||
179 | vattr->va_uid = (vuid_t) iattr->ia_uid; | ||
180 | } | ||
181 | if ( valid & ATTR_GID ) { | ||
182 | vattr->va_gid = (vgid_t) iattr->ia_gid; | ||
183 | } | ||
184 | if ( valid & ATTR_SIZE ) { | ||
185 | vattr->va_size = iattr->ia_size; | ||
186 | } | ||
187 | if ( valid & ATTR_ATIME ) { | ||
188 | vattr->va_atime = iattr->ia_atime; | ||
189 | } | ||
190 | if ( valid & ATTR_MTIME ) { | ||
191 | vattr->va_mtime = iattr->ia_mtime; | ||
192 | } | ||
193 | if ( valid & ATTR_CTIME ) { | ||
194 | vattr->va_ctime = iattr->ia_ctime; | ||
195 | } | ||
196 | } | ||
197 | |||