1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
--- a/fs/jffs2/build.c
+++ b/fs/jffs2/build.c
@@ -111,6 +111,17 @@ static int jffs2_build_filesystem(struct
dbg_fsbuild("scanned flash completely\n");
jffs2_dbg_dump_block_lists_nolock(c);
+ if (c->flags & (1 << 7)) {
+ printk("%s(): unlocking the mtd device... ", __func__);
+ if (c->mtd->unlock)
+ c->mtd->unlock(c->mtd, 0, c->mtd->size);
+ printk("done.\n");
+
+ printk("%s(): erasing all blocks after the end marker... ", __func__);
+ jffs2_erase_pending_blocks(c, -1);
+ printk("done.\n");
+ }
+
dbg_fsbuild("pass 1 starting\n");
c->flags |= JFFS2_SB_FLAG_BUILDING;
/* Now scan the directory tree, increasing nlink according to every dirent found. */
--- a/fs/jffs2/scan.c
+++ b/fs/jffs2/scan.c
@@ -72,7 +72,7 @@ static int file_dirty(struct jffs2_sb_in
return ret;
if ((ret = jffs2_scan_dirty_space(c, jeb, jeb->free_size)))
return ret;
- /* Turned wasted size into dirty, since we apparently
+ /* Turned wasted size into dirty, since we apparently
think it's recoverable now. */
jeb->dirty_size += jeb->wasted_size;
c->dirty_size += jeb->wasted_size;
@@ -144,8 +144,11 @@ int jffs2_scan_medium(struct jffs2_sb_in
/* reset summary info for next eraseblock scan */
jffs2_sum_reset_collected(s);
- ret = jffs2_scan_eraseblock(c, jeb, buf_size?flashbuf:(flashbuf+jeb->offset),
- buf_size, s);
+ if (c->flags & (1 << 7))
+ ret = BLK_STATE_ALLFF;
+ else
+ ret = jffs2_scan_eraseblock(c, jeb, buf_size?flashbuf:(flashbuf+jeb->offset),
+ buf_size, s);
if (ret < 0)
goto out;
@@ -400,7 +403,7 @@ static int jffs2_scan_xref_node(struct j
if (!ref)
return -ENOMEM;
- /* BEFORE jffs2_build_xattr_subsystem() called,
+ /* BEFORE jffs2_build_xattr_subsystem() called,
* and AFTER xattr_ref is marked as a dead xref,
* ref->xid is used to store 32bit xid, xd is not used
* ref->ino is used to store 32bit inode-number, ic is not used
@@ -473,7 +476,7 @@ static int jffs2_scan_eraseblock (struct
struct jffs2_sum_marker *sm;
void *sumptr = NULL;
uint32_t sumlen;
-
+
if (!buf_size) {
/* XIP case. Just look, point at the summary if it's there */
sm = (void *)buf + c->sector_size - sizeof(*sm);
@@ -489,9 +492,9 @@ static int jffs2_scan_eraseblock (struct
buf_len = sizeof(*sm);
/* Read as much as we want into the _end_ of the preallocated buffer */
- err = jffs2_fill_scan_buf(c, buf + buf_size - buf_len,
+ err = jffs2_fill_scan_buf(c, buf + buf_size - buf_len,
jeb->offset + c->sector_size - buf_len,
- buf_len);
+ buf_len);
if (err)
return err;
@@ -510,9 +513,9 @@ static int jffs2_scan_eraseblock (struct
}
if (buf_len < sumlen) {
/* Need to read more so that the entire summary node is present */
- err = jffs2_fill_scan_buf(c, sumptr,
+ err = jffs2_fill_scan_buf(c, sumptr,
jeb->offset + c->sector_size - sumlen,
- sumlen - buf_len);
+ sumlen - buf_len);
if (err)
return err;
}
@@ -525,7 +528,7 @@ static int jffs2_scan_eraseblock (struct
if (buf_size && sumlen > buf_size)
kfree(sumptr);
- /* If it returns with a real error, bail.
+ /* If it returns with a real error, bail.
If it returns positive, that's a block classification
(i.e. BLK_STATE_xxx) so return that too.
If it returns zero, fall through to full scan. */
@@ -546,6 +549,17 @@ static int jffs2_scan_eraseblock (struct
return err;
}
+ if ((buf[0] == 0xde) &&
+ (buf[1] == 0xad) &&
+ (buf[2] == 0xc0) &&
+ (buf[3] == 0xde)) {
+ /* end of filesystem. erase everything after this point */
+ printk("%s(): End of filesystem marker found at 0x%x\n", __func__, jeb->offset);
+ c->flags |= (1 << 7);
+
+ return BLK_STATE_ALLFF;
+ }
+
/* We temporarily use 'ofs' as a pointer into the buffer/jeb */
ofs = 0;
@@ -671,7 +685,7 @@ scan_more:
scan_end = buf_len;
goto more_empty;
}
-
+
/* See how much more there is to read in this eraseblock... */
buf_len = min_t(uint32_t, buf_size, jeb->offset + c->sector_size - ofs);
if (!buf_len) {
@@ -907,7 +921,7 @@ scan_more:
D1(printk(KERN_DEBUG "Block at 0x%08x: free 0x%08x, dirty 0x%08x, unchecked 0x%08x, used 0x%08x, wasted 0x%08x\n",
jeb->offset,jeb->free_size, jeb->dirty_size, jeb->unchecked_size, jeb->used_size, jeb->wasted_size));
-
+
/* mark_node_obsolete can add to wasted !! */
if (jeb->wasted_size) {
jeb->dirty_size += jeb->wasted_size;
|
