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[/] [or1k/] [tags/] [before_ORP/] [uclinux/] [uClinux-2.0.x/] [fs/] [minix/] [fsync.c] - Blame information for rev 1765

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/*
 *  linux/fs/minix/fsync.c
 *
 *  Copyright (C) 1993 Stephen Tweedie (sct@dcs.ed.ac.uk)
 *  from
 *  Copyright (C) 1991, 1992 Linus Torvalds
 *
 *  Copyright (C) 1996 Gertjan van Wingerde (gertjan@cs.vu.nl)
 *      Minix V2 fs support
 *
 *  minix fsync primitive
 */
 
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/stat.h>
#include <linux/fcntl.h>
#include <linux/locks.h>
 
#include <linux/fs.h>
#include <linux/minix_fs.h>
 
#include <asm/segment.h>
#include <asm/system.h>
 
#define blocksize BLOCK_SIZE
 
/*
 * The functions for minix V1 fs file synchronization.
 */
static int V1_sync_block (struct inode * inode, unsigned short * block, int wait)
{
        struct buffer_head * bh;
        unsigned short tmp;
 
        if (!*block)
                return 0;
        tmp = *block;
        bh = get_hash_table(inode->i_dev, *block, blocksize);
        if (!bh)
                return 0;
        if (*block != tmp) {
                brelse (bh);
                return 1;
        }
        if (wait && buffer_req(bh) && !buffer_uptodate(bh)) {
                brelse(bh);
                return -1;
        }
        if (wait || !buffer_uptodate(bh) || !buffer_dirty(bh))
        {
                brelse(bh);
                return 0;
        }
        ll_rw_block(WRITE, 1, &bh);
        bh->b_count--;
        return 0;
}
 
static int V1_sync_iblock (struct inode * inode, unsigned short * iblock,
                        struct buffer_head **bh, int wait)
{
        int rc;
        unsigned short tmp;
 
        *bh = NULL;
        tmp = *iblock;
        if (!tmp)
                return 0;
        rc = V1_sync_block (inode, iblock, wait);
        if (rc)
                return rc;
        *bh = bread(inode->i_dev, tmp, blocksize);
        if (tmp != *iblock) {
                brelse(*bh);
                *bh = NULL;
                return 1;
        }
        if (!*bh)
                return -1;
        return 0;
}
 
static int V1_sync_direct(struct inode *inode, int wait)
{
        int i;
        int rc, err = 0;
 
        for (i = 0; i < 7; i++) {
                rc = V1_sync_block (inode,
                     (unsigned short *) inode->u.minix_i.u.i1_data + i, wait);
                if (rc > 0)
                        break;
                if (rc)
                        err = rc;
        }
        return err;
}
 
static int V1_sync_indirect(struct inode *inode, unsigned short *iblock, int wait)
{
        int i;
        struct buffer_head * ind_bh;
        int rc, err = 0;
 
        rc = V1_sync_iblock (inode, iblock, &ind_bh, wait);
        if (rc || !ind_bh)
                return rc;
 
        for (i = 0; i < 512; i++) {
                rc = V1_sync_block (inode,
                                    ((unsigned short *) ind_bh->b_data) + i,
                                    wait);
                if (rc > 0)
                        break;
                if (rc)
                        err = rc;
        }
        brelse(ind_bh);
        return err;
}
 
static int V1_sync_dindirect(struct inode *inode, unsigned short *diblock,
                          int wait)
{
        int i;
        struct buffer_head * dind_bh;
        int rc, err = 0;
 
        rc = V1_sync_iblock (inode, diblock, &dind_bh, wait);
        if (rc || !dind_bh)
                return rc;
 
        for (i = 0; i < 512; i++) {
                rc = V1_sync_indirect (inode,
                                       ((unsigned short *) dind_bh->b_data) + i,
                                       wait);
                if (rc > 0)
                        break;
                if (rc)
                        err = rc;
        }
        brelse(dind_bh);
        return err;
}
 
int V1_minix_sync_file(struct inode * inode, struct file * file)
{
        int wait, err = 0;
 
        if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
             S_ISLNK(inode->i_mode)))
                return -EINVAL;
 
        for (wait=0; wait<=1; wait++)
        {
                err |= V1_sync_direct(inode, wait);
                err |= V1_sync_indirect(inode, inode->u.minix_i.u.i1_data + 7, wait);
                err |= V1_sync_dindirect(inode, inode->u.minix_i.u.i1_data + 8, wait);
        }
        err |= minix_sync_inode (inode);
        return (err < 0) ? -EIO : 0;
}
 
/*
 * The functions for minix V2 fs file synchronization.
 */
static int V2_sync_block (struct inode * inode, unsigned long * block, int wait)
{
        struct buffer_head * bh;
        unsigned long tmp;
 
        if (!*block)
                return 0;
        tmp = *block;
        bh = get_hash_table(inode->i_dev, *block, blocksize);
        if (!bh)
                return 0;
        if (*block != tmp) {
                brelse (bh);
                return 1;
        }
        if (wait && buffer_req(bh) && !buffer_uptodate(bh)) {
                brelse(bh);
                return -1;
        }
        if (wait || !buffer_uptodate(bh) || !buffer_dirty(bh))
        {
                brelse(bh);
                return 0;
        }
        ll_rw_block(WRITE, 1, &bh);
        bh->b_count--;
        return 0;
}
 
static int V2_sync_iblock (struct inode * inode, unsigned long * iblock,
                        struct buffer_head **bh, int wait)
{
        int rc;
        unsigned long tmp;
 
        *bh = NULL;
        tmp = *iblock;
        if (!tmp)
                return 0;
        rc = V2_sync_block (inode, iblock, wait);
        if (rc)
                return rc;
        *bh = bread(inode->i_dev, tmp, blocksize);
        if (tmp != *iblock) {
                brelse(*bh);
                *bh = NULL;
                return 1;
        }
        if (!*bh)
                return -1;
        return 0;
}
 
static int V2_sync_direct(struct inode *inode, int wait)
{
        int i;
        int rc, err = 0;
 
        for (i = 0; i < 7; i++) {
                rc = V2_sync_block (inode,
                        (unsigned long *)inode->u.minix_i.u.i2_data + i, wait);
                if (rc > 0)
                        break;
                if (rc)
                        err = rc;
        }
        return err;
}
 
static int V2_sync_indirect(struct inode *inode, unsigned long *iblock, int wait)
{
        int i;
        struct buffer_head * ind_bh;
        int rc, err = 0;
 
        rc = V2_sync_iblock (inode, iblock, &ind_bh, wait);
        if (rc || !ind_bh)
                return rc;
 
        for (i = 0; i < 256; i++) {
                rc = V2_sync_block (inode,
                                    ((unsigned long *) ind_bh->b_data) + i,
                                    wait);
                if (rc > 0)
                        break;
                if (rc)
                        err = rc;
        }
        brelse(ind_bh);
        return err;
}
 
static int V2_sync_dindirect(struct inode *inode, unsigned long *diblock,
                          int wait)
{
        int i;
        struct buffer_head * dind_bh;
        int rc, err = 0;
 
        rc = V2_sync_iblock (inode, diblock, &dind_bh, wait);
        if (rc || !dind_bh)
                return rc;
 
        for (i = 0; i < 256; i++) {
                rc = V2_sync_indirect (inode,
                                       ((unsigned long *) dind_bh->b_data) + i,
                                       wait);
                if (rc > 0)
                        break;
                if (rc)
                        err = rc;
        }
        brelse(dind_bh);
        return err;
}
 
static int V2_sync_tindirect(struct inode *inode, unsigned long *tiblock,
                          int wait)
{
        int i;
        struct buffer_head * tind_bh;
        int rc, err = 0;
 
        rc = V2_sync_iblock (inode, tiblock, &tind_bh, wait);
        if (rc || !tind_bh)
                return rc;
 
        for (i = 0; i < 256; i++) {
                rc = V2_sync_dindirect (inode,
                                        ((unsigned long *) tind_bh->b_data) + i,
                                        wait);
                if (rc > 0)
                        break;
                if (rc)
                        err = rc;
        }
        brelse(tind_bh);
        return err;
}
 
int V2_minix_sync_file(struct inode * inode, struct file * file)
{
        int wait, err = 0;
 
        if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
             S_ISLNK(inode->i_mode)))
                return -EINVAL;
 
        for (wait=0; wait<=1; wait++)
        {
                err |= V2_sync_direct(inode, wait);
                err |= V2_sync_indirect(inode,
                      (unsigned long *) inode->u.minix_i.u.i2_data + 7, wait);
                err |= V2_sync_dindirect(inode,
                      (unsigned long *) inode->u.minix_i.u.i2_data + 8, wait);
                err |= V2_sync_tindirect(inode,
                      (unsigned long *) inode->u.minix_i.u.i2_data + 9, wait);
        }
        err |= minix_sync_inode (inode);
        return (err < 0) ? -EIO : 0;
}
 
/*
 * The function which is called for file synchronization.
 */
int minix_sync_file(struct inode * inode, struct file * file)
{
        if (INODE_VERSION(inode) == MINIX_V1)
                return V1_minix_sync_file(inode, file);
        else
                return V2_minix_sync_file(inode, file);
}

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[/] [or1k/] [tags/] [before_ORP/] [uclinux/] [uClinux-2.0.x/] [fs/] [minix/] [fsync.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	199	simons	`/*`
2			`* linux/fs/minix/fsync.c`
3			`*`
4			`* Copyright (C) 1993 Stephen Tweedie (sct@dcs.ed.ac.uk)`
5			`* from`
6			`* Copyright (C) 1991, 1992 Linus Torvalds`
7			`*`
8			`* Copyright (C) 1996 Gertjan van Wingerde (gertjan@cs.vu.nl)`
9			`* Minix V2 fs support`
10			`*`
11			`* minix fsync primitive`
12			`*/`
13
14			`#include <linux/errno.h>`
15			`#include <linux/sched.h>`
16			`#include <linux/stat.h>`
17			`#include <linux/fcntl.h>`
18			`#include <linux/locks.h>`
19
20			`#include <linux/fs.h>`
21			`#include <linux/minix_fs.h>`
22
23			`#include <asm/segment.h>`
24			`#include <asm/system.h>`
25
26			`#define blocksize BLOCK_SIZE`
27
28			`/*`
29			`* The functions for minix V1 fs file synchronization.`
30			`*/`
31			`static int V1_sync_block (struct inode * inode, unsigned short * block, int wait)`
32			`{`
33			`struct buffer_head * bh;`
34			`unsigned short tmp;`
35
36			`if (!*block)`
37			`return 0;`
38			`tmp = *block;`
39			`bh = get_hash_table(inode->i_dev, *block, blocksize);`
40			`if (!bh)`
41			`return 0;`
42			`if (*block != tmp) {`
43			`brelse (bh);`
44			`return 1;`
45			`}`
46			`if (wait && buffer_req(bh) && !buffer_uptodate(bh)) {`
47			`brelse(bh);`
48			`return -1;`
49			`}`
50			`if (wait \|\| !buffer_uptodate(bh) \|\| !buffer_dirty(bh))`
51			`{`
52			`brelse(bh);`
53			`return 0;`
54			`}`
55			`ll_rw_block(WRITE, 1, &bh);`
56			`bh->b_count--;`
57			`return 0;`
58			`}`
59
60			`static int V1_sync_iblock (struct inode * inode, unsigned short * iblock,`
61			`struct buffer_head **bh, int wait)`
62			`{`
63			`int rc;`
64			`unsigned short tmp;`
65
66			`*bh = NULL;`
67			`tmp = *iblock;`
68			`if (!tmp)`
69			`return 0;`
70			`rc = V1_sync_block (inode, iblock, wait);`
71			`if (rc)`
72			`return rc;`
73			`*bh = bread(inode->i_dev, tmp, blocksize);`
74			`if (tmp != *iblock) {`
75			`brelse(*bh);`
76			`*bh = NULL;`
77			`return 1;`
78			`}`
79			`if (!*bh)`
80			`return -1;`
81			`return 0;`
82			`}`
83
84			`static int V1_sync_direct(struct inode *inode, int wait)`
85			`{`
86			`int i;`
87			`int rc, err = 0;`
88
89			`for (i = 0; i < 7; i++) {`
90			`rc = V1_sync_block (inode,`
91			`(unsigned short *) inode->u.minix_i.u.i1_data + i, wait);`
92			`if (rc > 0)`
93			`break;`
94			`if (rc)`
95			`err = rc;`
96			`}`
97			`return err;`
98			`}`
99
100			`static int V1_sync_indirect(struct inode inode, unsigned short iblock, int wait)`
101			`{`
102			`int i;`
103			`struct buffer_head * ind_bh;`
104			`int rc, err = 0;`
105
106			`rc = V1_sync_iblock (inode, iblock, &ind_bh, wait);`
107			`if (rc \|\| !ind_bh)`
108			`return rc;`
109
110			`for (i = 0; i < 512; i++) {`
111			`rc = V1_sync_block (inode,`
112			`((unsigned short *) ind_bh->b_data) + i,`
113			`wait);`
114			`if (rc > 0)`
115			`break;`
116			`if (rc)`
117			`err = rc;`
118			`}`
119			`brelse(ind_bh);`
120			`return err;`
121			`}`
122
123			`static int V1_sync_dindirect(struct inode inode, unsigned short diblock,`
124			`int wait)`
125			`{`
126			`int i;`
127			`struct buffer_head * dind_bh;`
128			`int rc, err = 0;`
129
130			`rc = V1_sync_iblock (inode, diblock, &dind_bh, wait);`
131			`if (rc \|\| !dind_bh)`
132			`return rc;`
133
134			`for (i = 0; i < 512; i++) {`
135			`rc = V1_sync_indirect (inode,`
136			`((unsigned short *) dind_bh->b_data) + i,`
137			`wait);`
138			`if (rc > 0)`
139			`break;`
140			`if (rc)`
141			`err = rc;`
142			`}`
143			`brelse(dind_bh);`
144			`return err;`
145			`}`
146
147			`int V1_minix_sync_file(struct inode * inode, struct file * file)`
148			`{`
149			`int wait, err = 0;`
150
151			`if (!(S_ISREG(inode->i_mode) \|\| S_ISDIR(inode->i_mode) \|\|`
152			`S_ISLNK(inode->i_mode)))`
153			`return -EINVAL;`
154
155			`for (wait=0; wait<=1; wait++)`
156			`{`
157			`err \|= V1_sync_direct(inode, wait);`
158			`err \|= V1_sync_indirect(inode, inode->u.minix_i.u.i1_data + 7, wait);`
159			`err \|= V1_sync_dindirect(inode, inode->u.minix_i.u.i1_data + 8, wait);`
160			`}`
161			`err \|= minix_sync_inode (inode);`
162			`return (err < 0) ? -EIO : 0;`
163			`}`
164
165			`/*`
166			`* The functions for minix V2 fs file synchronization.`
167			`*/`
168			`static int V2_sync_block (struct inode * inode, unsigned long * block, int wait)`
169			`{`
170			`struct buffer_head * bh;`
171			`unsigned long tmp;`
172
173			`if (!*block)`
174			`return 0;`
175			`tmp = *block;`
176			`bh = get_hash_table(inode->i_dev, *block, blocksize);`
177			`if (!bh)`
178			`return 0;`
179			`if (*block != tmp) {`
180			`brelse (bh);`
181			`return 1;`
182			`}`
183			`if (wait && buffer_req(bh) && !buffer_uptodate(bh)) {`
184			`brelse(bh);`
185			`return -1;`
186			`}`
187			`if (wait \|\| !buffer_uptodate(bh) \|\| !buffer_dirty(bh))`
188			`{`
189			`brelse(bh);`
190			`return 0;`
191			`}`
192			`ll_rw_block(WRITE, 1, &bh);`
193			`bh->b_count--;`
194			`return 0;`
195			`}`
196
197			`static int V2_sync_iblock (struct inode * inode, unsigned long * iblock,`
198			`struct buffer_head **bh, int wait)`
199			`{`
200			`int rc;`
201			`unsigned long tmp;`
202
203			`*bh = NULL;`
204			`tmp = *iblock;`
205			`if (!tmp)`
206			`return 0;`
207			`rc = V2_sync_block (inode, iblock, wait);`
208			`if (rc)`
209			`return rc;`
210			`*bh = bread(inode->i_dev, tmp, blocksize);`
211			`if (tmp != *iblock) {`
212			`brelse(*bh);`
213			`*bh = NULL;`
214			`return 1;`
215			`}`
216			`if (!*bh)`
217			`return -1;`
218			`return 0;`
219			`}`
220
221			`static int V2_sync_direct(struct inode *inode, int wait)`
222			`{`
223			`int i;`
224			`int rc, err = 0;`
225
226			`for (i = 0; i < 7; i++) {`
227			`rc = V2_sync_block (inode,`
228			`(unsigned long *)inode->u.minix_i.u.i2_data + i, wait);`
229			`if (rc > 0)`
230			`break;`
231			`if (rc)`
232			`err = rc;`
233			`}`
234			`return err;`
235			`}`
236
237			`static int V2_sync_indirect(struct inode inode, unsigned long iblock, int wait)`
238			`{`
239			`int i;`
240			`struct buffer_head * ind_bh;`
241			`int rc, err = 0;`
242
243			`rc = V2_sync_iblock (inode, iblock, &ind_bh, wait);`
244			`if (rc \|\| !ind_bh)`
245			`return rc;`
246
247			`for (i = 0; i < 256; i++) {`
248			`rc = V2_sync_block (inode,`
249			`((unsigned long *) ind_bh->b_data) + i,`
250			`wait);`
251			`if (rc > 0)`
252			`break;`
253			`if (rc)`
254			`err = rc;`
255			`}`
256			`brelse(ind_bh);`
257			`return err;`
258			`}`
259
260			`static int V2_sync_dindirect(struct inode inode, unsigned long diblock,`
261			`int wait)`
262			`{`
263			`int i;`
264			`struct buffer_head * dind_bh;`
265			`int rc, err = 0;`
266
267			`rc = V2_sync_iblock (inode, diblock, &dind_bh, wait);`
268			`if (rc \|\| !dind_bh)`
269			`return rc;`
270
271			`for (i = 0; i < 256; i++) {`
272			`rc = V2_sync_indirect (inode,`
273			`((unsigned long *) dind_bh->b_data) + i,`
274			`wait);`
275			`if (rc > 0)`
276			`break;`
277			`if (rc)`
278			`err = rc;`
279			`}`
280			`brelse(dind_bh);`
281			`return err;`
282			`}`
283
284			`static int V2_sync_tindirect(struct inode inode, unsigned long tiblock,`
285			`int wait)`
286			`{`
287			`int i;`
288			`struct buffer_head * tind_bh;`
289			`int rc, err = 0;`
290
291			`rc = V2_sync_iblock (inode, tiblock, &tind_bh, wait);`
292			`if (rc \|\| !tind_bh)`
293			`return rc;`
294
295			`for (i = 0; i < 256; i++) {`
296			`rc = V2_sync_dindirect (inode,`
297			`((unsigned long *) tind_bh->b_data) + i,`
298			`wait);`
299			`if (rc > 0)`
300			`break;`
301			`if (rc)`
302			`err = rc;`
303			`}`
304			`brelse(tind_bh);`
305			`return err;`
306			`}`
307
308			`int V2_minix_sync_file(struct inode * inode, struct file * file)`
309			`{`
310			`int wait, err = 0;`
311
312			`if (!(S_ISREG(inode->i_mode) \|\| S_ISDIR(inode->i_mode) \|\|`
313			`S_ISLNK(inode->i_mode)))`
314			`return -EINVAL;`
315
316			`for (wait=0; wait<=1; wait++)`
317			`{`
318			`err \|= V2_sync_direct(inode, wait);`
319			`err \|= V2_sync_indirect(inode,`
320			`(unsigned long *) inode->u.minix_i.u.i2_data + 7, wait);`
321			`err \|= V2_sync_dindirect(inode,`
322			`(unsigned long *) inode->u.minix_i.u.i2_data + 8, wait);`
323			`err \|= V2_sync_tindirect(inode,`
324			`(unsigned long *) inode->u.minix_i.u.i2_data + 9, wait);`
325			`}`
326			`err \|= minix_sync_inode (inode);`
327			`return (err < 0) ? -EIO : 0;`
328			`}`
329
330			`/*`
331			`* The function which is called for file synchronization.`
332			`*/`
333			`int minix_sync_file(struct inode * inode, struct file * file)`
334			`{`
335			`if (INODE_VERSION(inode) == MINIX_V1)`
336			`return V1_minix_sync_file(inode, file);`
337			`else`
338			`return V2_minix_sync_file(inode, file);`
339			`}`