annotate src/file.cbc @ 173:7c200a8328fa

fix user malloc and spinlock redefinition
author kono
date Fri, 17 Jan 2020 14:30:07 +0900
parents ef44d384ad9d
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
1 //
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
2 // File descriptors
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
3 //
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
4
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
5 #include "types.h"
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
6 #include "defs.h"
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
7 #include "param.h"
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
8 #include "fs.h"
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
9 #include "file.h"
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
10 #include "spinlock.h"
32
96af12a50fdb fix cbc_read
mir3636
parents: 31
diff changeset
11 #include "proc.h"
0
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
12
52
214d21c891c7 rename to cbc
kono
parents: 35
diff changeset
13 #define __ncode __code
173
7c200a8328fa fix user malloc and spinlock redefinition
kono
parents: 113
diff changeset
14
7c200a8328fa fix user malloc and spinlock redefinition
kono
parents: 113
diff changeset
15 // data_gear "file.dg"
7c200a8328fa fix user malloc and spinlock redefinition
kono
parents: 113
diff changeset
16
0
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
17 struct devsw devsw[NDEV];
27
mir3636
parents: 24
diff changeset
18 struct cbc_devsw cbc_devsw[NDEV];
mir3636
parents: 24
diff changeset
19
0
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
20 struct {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
21 struct spinlock lock;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
22 struct file file[NFILE];
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
23 } ftable;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
24
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
25 void fileinit (void)
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
26 {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
27 initlock(&ftable.lock, "ftable");
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
28 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
29
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
30 // Allocate a file structure.
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
31 struct file* filealloc (void)
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
32 {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
33 struct file *f;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
34
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
35 acquire(&ftable.lock);
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
36
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
37 for (f = ftable.file; f < ftable.file + NFILE; f++) {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
38 if (f->ref == 0) {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
39 f->ref = 1;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
40 release(&ftable.lock);
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
41 return f;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
42 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
43 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
44
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
45 release(&ftable.lock);
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
46 return 0;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
47 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
48
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
49 // Increment ref count for file f.
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
50 struct file* filedup (struct file *f)
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
51 {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
52 acquire(&ftable.lock);
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
53
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
54 if (f->ref < 1) {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
55 panic("filedup");
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
56 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
57
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
58 f->ref++;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
59 release(&ftable.lock);
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
60 return f;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
61 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
62
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
63 // Close file f. (Decrement ref count, close when reaches 0.)
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
64 void fileclose (struct file *f)
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
65 {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
66 struct file ff;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
67
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
68 acquire(&ftable.lock);
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
69
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
70 if (f->ref < 1) {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
71 panic("fileclose");
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
72 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
73
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
74 if (--f->ref > 0) {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
75 release(&ftable.lock);
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
76 return;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
77 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
78
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
79 ff = *f;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
80 f->ref = 0;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
81 f->type = FD_NONE;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
82 release(&ftable.lock);
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
83
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
84 if (ff.type == FD_PIPE) {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
85 pipeclose(ff.pipe, ff.writable);
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
86
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
87 } else if (ff.type == FD_INODE) {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
88 begin_trans();
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
89 iput(ff.ip);
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
90 commit_trans();
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
91 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
92 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
93
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
94 // Get metadata about file f.
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
95 int filestat (struct file *f, struct stat *st)
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
96 {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
97 if (f->type == FD_INODE) {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
98 ilock(f->ip);
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
99 stati(f->ip, st);
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
100 iunlock(f->ip);
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
101
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
102 return 0;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
103 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
104
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
105 return -1;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
106 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
107
52
214d21c891c7 rename to cbc
kono
parents: 35
diff changeset
108 __ncode cbc_fileread1 (int r)
24
36bd61f5c847 rewrite sys_read cbc
mir3636
parents: 0
diff changeset
109 {
33
7a63dacab7f8 fix cbc_read
mir3636
parents: 32
diff changeset
110 struct file *f = proc->cbc_arg.cbc_console_arg.f;
7a63dacab7f8 fix cbc_read
mir3636
parents: 32
diff changeset
111 __code (*next)(int ret) = cbc_ret;
24
36bd61f5c847 rewrite sys_read cbc
mir3636
parents: 0
diff changeset
112 if (r > 0)
36bd61f5c847 rewrite sys_read cbc
mir3636
parents: 0
diff changeset
113 f->off += r;
36bd61f5c847 rewrite sys_read cbc
mir3636
parents: 0
diff changeset
114 iunlock(f->ip);
36bd61f5c847 rewrite sys_read cbc
mir3636
parents: 0
diff changeset
115 goto next(r);
36bd61f5c847 rewrite sys_read cbc
mir3636
parents: 0
diff changeset
116 }
36bd61f5c847 rewrite sys_read cbc
mir3636
parents: 0
diff changeset
117
113
ef44d384ad9d rollback rev 52
anatofuz <anatofuz@cr.ie.u-ryukyu.ac.jp>
parents: 111
diff changeset
118 __ncode cbc_fileread (struct file *f, char *addr, int n, __code (*next)(int ret))
24
36bd61f5c847 rewrite sys_read cbc
mir3636
parents: 0
diff changeset
119 {
36bd61f5c847 rewrite sys_read cbc
mir3636
parents: 0
diff changeset
120 if (f->readable == 0) {
36bd61f5c847 rewrite sys_read cbc
mir3636
parents: 0
diff changeset
121 goto next(-1);
36bd61f5c847 rewrite sys_read cbc
mir3636
parents: 0
diff changeset
122 }
36bd61f5c847 rewrite sys_read cbc
mir3636
parents: 0
diff changeset
123
36bd61f5c847 rewrite sys_read cbc
mir3636
parents: 0
diff changeset
124 if (f->type == FD_PIPE) {
113
ef44d384ad9d rollback rev 52
anatofuz <anatofuz@cr.ie.u-ryukyu.ac.jp>
parents: 111
diff changeset
125 goto cbc_piperead(f->pipe, addr, n, next);
30
mir3636
parents: 27
diff changeset
126 goto next(-1);
24
36bd61f5c847 rewrite sys_read cbc
mir3636
parents: 0
diff changeset
127 }
36bd61f5c847 rewrite sys_read cbc
mir3636
parents: 0
diff changeset
128
36bd61f5c847 rewrite sys_read cbc
mir3636
parents: 0
diff changeset
129 if (f->type == FD_INODE) {
36bd61f5c847 rewrite sys_read cbc
mir3636
parents: 0
diff changeset
130 ilock(f->ip);
33
7a63dacab7f8 fix cbc_read
mir3636
parents: 32
diff changeset
131 proc->cbc_arg.cbc_console_arg.f = f;
7a63dacab7f8 fix cbc_read
mir3636
parents: 32
diff changeset
132 goto cbc_readi(f->ip, addr, f->off, n, cbc_fileread1);
24
36bd61f5c847 rewrite sys_read cbc
mir3636
parents: 0
diff changeset
133 }
36bd61f5c847 rewrite sys_read cbc
mir3636
parents: 0
diff changeset
134
36bd61f5c847 rewrite sys_read cbc
mir3636
parents: 0
diff changeset
135 goto cbc_panic("fileread");
36bd61f5c847 rewrite sys_read cbc
mir3636
parents: 0
diff changeset
136 }
36bd61f5c847 rewrite sys_read cbc
mir3636
parents: 0
diff changeset
137
0
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
138 // Read from file f.
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
139 int fileread (struct file *f, char *addr, int n)
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
140 {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
141 int r;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
142
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
143 if (f->readable == 0) {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
144 return -1;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
145 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
146
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
147 if (f->type == FD_PIPE) {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
148 return piperead(f->pipe, addr, n);
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
149 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
150
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
151 if (f->type == FD_INODE) {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
152 ilock(f->ip);
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
153
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
154 if ((r = readi(f->ip, addr, f->off, n)) > 0) {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
155 f->off += r;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
156 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
157
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
158 iunlock(f->ip);
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
159
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
160 return r;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
161 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
162
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
163 panic("fileread");
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
164 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
165
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
166 //PAGEBREAK!
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
167 // Write to file f.
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
168 int filewrite (struct file *f, char *addr, int n)
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
169 {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
170 int r;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
171 int i;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
172 int max;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
173 int n1;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
174
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
175 if (f->writable == 0) {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
176 return -1;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
177 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
178
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
179 if (f->type == FD_PIPE) {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
180 return pipewrite(f->pipe, addr, n);
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
181 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
182
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
183 if (f->type == FD_INODE) {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
184 // write a few blocks at a time to avoid exceeding
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
185 // the maximum log transaction size, including
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
186 // i-node, indirect block, allocation blocks,
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
187 // and 2 blocks of slop for non-aligned writes.
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
188 // this really belongs lower down, since writei()
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
189 // might be writing a device like the console.
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
190 max = ((LOGSIZE - 1 - 1 - 2) / 2) * 512;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
191 i = 0;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
192
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
193 while (i < n) {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
194 n1 = n - i;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
195
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
196 if (n1 > max) {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
197 n1 = max;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
198 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
199
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
200 begin_trans();
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
201 ilock(f->ip);
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
202
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
203 if ((r = writei(f->ip, addr + i, f->off, n1)) > 0) {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
204 f->off += r;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
205 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
206
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
207 iunlock(f->ip);
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
208 commit_trans();
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
209
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
210 if (r < 0) {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
211 break;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
212 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
213
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
214 if (r != n1) {
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
215 panic("short filewrite");
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
216 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
217
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
218 i += r;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
219 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
220
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
221 return i == n ? n : -1;
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
222 }
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
223
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents:
diff changeset
224 panic("filewrite");
109
4f9d95dc4efd fix createInstance
anatofuz <anatofuz@cr.ie.u-ryukyu.ac.jp>
parents: 96
diff changeset
225 }
4f9d95dc4efd fix createInstance
anatofuz <anatofuz@cr.ie.u-ryukyu.ac.jp>
parents: 96
diff changeset
226