return BLK_STATE_ALLDIRTY;
}
+#ifdef CONFIG_JFFS2_FS_XATTR
+static int jffs2_scan_xattr_node(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
+ struct jffs2_raw_xattr *rx, uint32_t ofs,
+ struct jffs2_summary *s)
+{
+ struct jffs2_xattr_datum *xd;
+ struct jffs2_raw_node_ref *raw;
+ uint32_t totlen, crc;
+
+ crc = crc32(0, rx, sizeof(struct jffs2_raw_xattr) - 4);
+ if (crc != je32_to_cpu(rx->node_crc)) {
+ if (je32_to_cpu(rx->node_crc) != 0xffffffff)
+ JFFS2_WARNING("node CRC failed at %#08x, read=%#08x, calc=%#08x\n",
+ ofs, je32_to_cpu(rx->node_crc), crc);
+ DIRTY_SPACE(je32_to_cpu(rx->totlen));
+ return 0;
+ }
+
+ totlen = PAD(sizeof(*rx) + rx->name_len + 1 + je16_to_cpu(rx->value_len));
+ if (totlen != je32_to_cpu(rx->totlen)) {
+ JFFS2_WARNING("node length mismatch at %#08x, read=%u, calc=%u\n",
+ ofs, je32_to_cpu(rx->totlen), totlen);
+ DIRTY_SPACE(je32_to_cpu(rx->totlen));
+ return 0;
+ }
+
+ raw = jffs2_alloc_raw_node_ref();
+ if (!raw)
+ return -ENOMEM;
+
+ xd = jffs2_setup_xattr_datum(c, je32_to_cpu(rx->xid), je32_to_cpu(rx->version));
+ if (IS_ERR(xd)) {
+ jffs2_free_raw_node_ref(raw);
+ if (PTR_ERR(xd) == -EEXIST) {
+ DIRTY_SPACE(PAD(je32_to_cpu(rx->totlen)));
+ return 0;
+ }
+ return PTR_ERR(xd);
+ }
+ xd->xprefix = rx->xprefix;
+ xd->name_len = rx->name_len;
+ xd->value_len = je16_to_cpu(rx->value_len);
+ xd->data_crc = je32_to_cpu(rx->data_crc);
+ xd->node = raw;
+
+ raw->__totlen = totlen;
+ raw->flash_offset = ofs | REF_PRISTINE;
+ raw->next_phys = NULL;
+ raw->next_in_ino = (void *)xd;
+ if (!jeb->first_node)
+ jeb->first_node = raw;
+ if (jeb->last_node)
+ jeb->last_node->next_phys = raw;
+ jeb->last_node = raw;
+
+ USED_SPACE(PAD(je32_to_cpu(rx->totlen)));
+ if (jffs2_sum_active())
+ jffs2_sum_add_xattr_mem(s, rx, ofs - jeb->offset);
+ dbg_xattr("scaning xdatum at %#08x (xid=%u, version=%u)\n",
+ ofs, xd->xid, xd->version);
+ return 0;
+}
+
+static int jffs2_scan_xref_node(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
+ struct jffs2_raw_xref *rr, uint32_t ofs,
+ struct jffs2_summary *s)
+{
+ struct jffs2_xattr_ref *ref;
+ struct jffs2_raw_node_ref *raw;
+ uint32_t crc;
+
+ crc = crc32(0, rr, sizeof(*rr) - 4);
+ if (crc != je32_to_cpu(rr->node_crc)) {
+ if (je32_to_cpu(rr->node_crc) != 0xffffffff)
+ JFFS2_WARNING("node CRC failed at %#08x, read=%#08x, calc=%#08x\n",
+ ofs, je32_to_cpu(rr->node_crc), crc);
+ DIRTY_SPACE(PAD(je32_to_cpu(rr->totlen)));
+ return 0;
+ }
+
+ if (PAD(sizeof(struct jffs2_raw_xref)) != je32_to_cpu(rr->totlen)) {
+ JFFS2_WARNING("node length mismatch at %#08x, read=%u, calc=%u\n",
+ ofs, je32_to_cpu(rr->totlen),
+ PAD(sizeof(struct jffs2_raw_xref)));
+ DIRTY_SPACE(je32_to_cpu(rr->totlen));
+ return 0;
+ }
+
+ ref = jffs2_alloc_xattr_ref();
+ if (!ref)
+ return -ENOMEM;
+
+ raw = jffs2_alloc_raw_node_ref();
+ if (!raw) {
+ jffs2_free_xattr_ref(ref);
+ return -ENOMEM;
+ }
+
+ /* BEFORE jffs2_build_xattr_subsystem() called,
+ * 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
+ * Thoes variables are declared as union, thus using those
+ * are exclusive. In a similar way, ref->next is temporarily
+ * used to chain all xattr_ref object. It's re-chained to
+ * jffs2_inode_cache in jffs2_build_xattr_subsystem() correctly.
+ */
+ ref->node = raw;
+ ref->ino = je32_to_cpu(rr->ino);
+ ref->xid = je32_to_cpu(rr->xid);
+ ref->next = c->xref_temp;
+ c->xref_temp = ref;
+
+ raw->__totlen = PAD(je32_to_cpu(rr->totlen));
+ raw->flash_offset = ofs | REF_PRISTINE;
+ raw->next_phys = NULL;
+ raw->next_in_ino = (void *)ref;
+ if (!jeb->first_node)
+ jeb->first_node = raw;
+ if (jeb->last_node)
+ jeb->last_node->next_phys = raw;
+ jeb->last_node = raw;
+
+ USED_SPACE(PAD(je32_to_cpu(rr->totlen)));
+ if (jffs2_sum_active())
+ jffs2_sum_add_xref_mem(s, rr, ofs - jeb->offset);
+ dbg_xattr("scan xref at %#08x (xid=%u, ino=%u)\n",
+ ofs, ref->xid, ref->ino);
+ return 0;
+}
+#endif
+
+/* Called with 'buf_size == 0' if buf is in fact a pointer _directly_ into
+ the flash, XIP-style */
static int jffs2_scan_eraseblock (struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
- unsigned char *buf, uint32_t buf_size, struct jffs2_summary *s) {
+ unsigned char *buf, uint32_t buf_size, struct jffs2_summary *s) {
struct jffs2_unknown_node *node;
struct jffs2_unknown_node crcnode;
- struct jffs2_sum_marker *sm;
uint32_t ofs, prevofs;
uint32_t hdr_crc, buf_ofs, buf_len;
int err;
#endif
if (jffs2_sum_active()) {
- sm = kmalloc(sizeof(struct jffs2_sum_marker), GFP_KERNEL);
- if (!sm) {
- return -ENOMEM;
- }
+ 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 + jeb->offset - sizeof(*sm);
+ if (je32_to_cpu(sm->magic) == JFFS2_SUM_MAGIC) {
+ sumptr = buf + je32_to_cpu(sm->offset);
+ sumlen = c->sector_size - je32_to_cpu(sm->offset);
+ }
+ } else {
+ /* If NAND flash, read a whole page of it. Else just the end */
+ if (c->wbuf_pagesize)
+ buf_len = c->wbuf_pagesize;
+ else
+ 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,
+ jeb->offset + c->sector_size - buf_len,
+ buf_len);
+ if (err)
+ return err;
+
+ sm = (void *)buf + buf_size - sizeof(*sm);
+ if (je32_to_cpu(sm->magic) == JFFS2_SUM_MAGIC) {
+ sumlen = c->sector_size - je32_to_cpu(sm->offset);
+ sumptr = buf + buf_size - sumlen;
+
+ /* Now, make sure the summary itself is available */
+ if (sumlen > buf_size) {
+ /* Need to kmalloc for this. */
+ sumptr = kmalloc(sumlen, GFP_KERNEL);
+ if (!sumptr)
+ return -ENOMEM;
+ memcpy(sumptr + sumlen - buf_len, buf + buf_size - buf_len, buf_len);
+ }
+ if (buf_len < sumlen) {
+ /* Need to read more so that the entire summary node is present */
+ err = jffs2_fill_scan_buf(c, sumptr,
+ jeb->offset + c->sector_size - sumlen,
+ sumlen - buf_len);
+ if (err)
+ return err;
+ }
+ }
- err = jffs2_fill_scan_buf(c, (unsigned char *) sm, jeb->offset + c->sector_size -
- sizeof(struct jffs2_sum_marker), sizeof(struct jffs2_sum_marker));
- if (err) {
- kfree(sm);
- return err;
}
- if (je32_to_cpu(sm->magic) == JFFS2_SUM_MAGIC ) {
- err = jffs2_sum_scan_sumnode(c, jeb, je32_to_cpu(sm->offset), &pseudo_random);
- if (err) {
- kfree(sm);
+ if (sumptr) {
+ err = jffs2_sum_scan_sumnode(c, jeb, sumptr, sumlen, &pseudo_random);
+ if (err)
return err;
- }
+ if (buf_size && sumlen > buf_size)
+ kfree(sumptr);
}
-
- kfree(sm);
-
- ofs = jeb->offset;
- prevofs = jeb->offset - 1;
}
buf_ofs = jeb->offset;
if (!buf_size) {
+ /* This is the XIP case -- we're reading _directly_ from the flash chip */
buf_len = c->sector_size;
-
- if (jffs2_sum_active()) {
- /* must reread because of summary test */
- err = jffs2_fill_scan_buf(c, buf, buf_ofs, buf_len);
- if (err)
- return err;
- }
-
} else {
buf_len = EMPTY_SCAN_SIZE(c->sector_size);
err = jffs2_fill_scan_buf(c, buf, buf_ofs, buf_len);
ofs += PAD(je32_to_cpu(node->totlen));
break;
+#ifdef CONFIG_JFFS2_FS_XATTR
+ case JFFS2_NODETYPE_XATTR:
+ if (buf_ofs + buf_len < ofs + je32_to_cpu(node->totlen)) {
+ buf_len = min_t(uint32_t, buf_size, jeb->offset + c->sector_size - ofs);
+ D1(printk(KERN_DEBUG "Fewer than %d bytes (xattr node)"
+ " left to end of buf. Reading 0x%x at 0x%08x\n",
+ je32_to_cpu(node->totlen), buf_len, ofs));
+ err = jffs2_fill_scan_buf(c, buf, ofs, buf_len);
+ if (err)
+ return err;
+ buf_ofs = ofs;
+ node = (void *)buf;
+ }
+ err = jffs2_scan_xattr_node(c, jeb, (void *)node, ofs, s);
+ if (err)
+ return err;
+ ofs += PAD(je32_to_cpu(node->totlen));
+ break;
+ case JFFS2_NODETYPE_XREF:
+ if (buf_ofs + buf_len < ofs + je32_to_cpu(node->totlen)) {
+ buf_len = min_t(uint32_t, buf_size, jeb->offset + c->sector_size - ofs);
+ D1(printk(KERN_DEBUG "Fewer than %d bytes (xref node)"
+ " left to end of buf. Reading 0x%x at 0x%08x\n",
+ je32_to_cpu(node->totlen), buf_len, ofs));
+ err = jffs2_fill_scan_buf(c, buf, ofs, buf_len);
+ if (err)
+ return err;
+ buf_ofs = ofs;
+ node = (void *)buf;
+ }
+ err = jffs2_scan_xref_node(c, jeb, (void *)node, ofs, s);
+ if (err)
+ return err;
+ ofs += PAD(je32_to_cpu(node->totlen));
+ break;
+#endif /* CONFIG_JFFS2_FS_XATTR */
+
case JFFS2_NODETYPE_CLEANMARKER:
D1(printk(KERN_DEBUG "CLEANMARKER node found at 0x%08x\n", ofs));
if (je32_to_cpu(node->totlen) != c->cleanmarker_size) {
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff