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fs/jffs2/summary.c
23.5 KB
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/* * JFFS2 -- Journalling Flash File System, Version 2. * |
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* Copyright © 2004 Ferenc Havasi <havasi@inf.u-szeged.hu>, |
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* Zoltan Sogor <weth@inf.u-szeged.hu>, * Patrik Kluba <pajko@halom.u-szeged.hu>, * University of Szeged, Hungary * 2006 KaiGai Kohei <kaigai@ak.jp.nec.com> |
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* * For licensing information, see the file 'LICENCE' in this directory. * |
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*/ #include <linux/kernel.h> |
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#include <linux/slab.h> #include <linux/mtd/mtd.h> #include <linux/pagemap.h> #include <linux/crc32.h> #include <linux/compiler.h> #include <linux/vmalloc.h> #include "nodelist.h" #include "debug.h" int jffs2_sum_init(struct jffs2_sb_info *c) { |
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uint32_t sum_size = min_t(uint32_t, c->sector_size, MAX_SUMMARY_SIZE); |
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c->summary = kzalloc(sizeof(struct jffs2_summary), GFP_KERNEL); |
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if (!c->summary) { JFFS2_WARNING("Can't allocate memory for summary information! "); return -ENOMEM; } |
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c->summary->sum_buf = kmalloc(sum_size, GFP_KERNEL); |
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if (!c->summary->sum_buf) { JFFS2_WARNING("Can't allocate buffer for writing out summary information! "); |
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kfree(c->summary); |
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return -ENOMEM; } |
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dbg_summary("returned successfully "); |
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return 0; } void jffs2_sum_exit(struct jffs2_sb_info *c) { |
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dbg_summary("called "); |
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jffs2_sum_disable_collecting(c->summary); |
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kfree(c->summary->sum_buf); |
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c->summary->sum_buf = NULL; kfree(c->summary); c->summary = NULL; } static int jffs2_sum_add_mem(struct jffs2_summary *s, union jffs2_sum_mem *item) { if (!s->sum_list_head) s->sum_list_head = (union jffs2_sum_mem *) item; if (s->sum_list_tail) s->sum_list_tail->u.next = (union jffs2_sum_mem *) item; s->sum_list_tail = (union jffs2_sum_mem *) item; switch (je16_to_cpu(item->u.nodetype)) { case JFFS2_NODETYPE_INODE: s->sum_size += JFFS2_SUMMARY_INODE_SIZE; s->sum_num++; |
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dbg_summary("inode (%u) added to summary ", |
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je32_to_cpu(item->i.inode)); break; case JFFS2_NODETYPE_DIRENT: s->sum_size += JFFS2_SUMMARY_DIRENT_SIZE(item->d.nsize); s->sum_num++; |
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dbg_summary("dirent (%u) added to summary ", |
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je32_to_cpu(item->d.ino)); break; |
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#ifdef CONFIG_JFFS2_FS_XATTR case JFFS2_NODETYPE_XATTR: s->sum_size += JFFS2_SUMMARY_XATTR_SIZE; s->sum_num++; dbg_summary("xattr (xid=%u, version=%u) added to summary ", je32_to_cpu(item->x.xid), je32_to_cpu(item->x.version)); break; case JFFS2_NODETYPE_XREF: s->sum_size += JFFS2_SUMMARY_XREF_SIZE; s->sum_num++; dbg_summary("xref added to summary "); break; #endif |
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default: |
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JFFS2_WARNING("UNKNOWN node type %u ", |
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je16_to_cpu(item->u.nodetype)); return 1; } return 0; } /* The following 3 functions are called from scan.c to collect summary info for not closed jeb */ int jffs2_sum_add_padding_mem(struct jffs2_summary *s, uint32_t size) { |
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dbg_summary("called with %u ", size); |
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s->sum_padded += size; return 0; } int jffs2_sum_add_inode_mem(struct jffs2_summary *s, struct jffs2_raw_inode *ri, uint32_t ofs) { struct jffs2_sum_inode_mem *temp = kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL); if (!temp) return -ENOMEM; temp->nodetype = ri->nodetype; temp->inode = ri->ino; temp->version = ri->version; |
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temp->offset = cpu_to_je32(ofs); /* relative offset from the beginning of the jeb */ |
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temp->totlen = ri->totlen; temp->next = NULL; return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); } int jffs2_sum_add_dirent_mem(struct jffs2_summary *s, struct jffs2_raw_dirent *rd, uint32_t ofs) { struct jffs2_sum_dirent_mem *temp = kmalloc(sizeof(struct jffs2_sum_dirent_mem) + rd->nsize, GFP_KERNEL); if (!temp) return -ENOMEM; temp->nodetype = rd->nodetype; temp->totlen = rd->totlen; |
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temp->offset = cpu_to_je32(ofs); /* relative from the beginning of the jeb */ |
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temp->pino = rd->pino; temp->version = rd->version; temp->ino = rd->ino; temp->nsize = rd->nsize; temp->type = rd->type; temp->next = NULL; memcpy(temp->name, rd->name, rd->nsize); return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); } |
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#ifdef CONFIG_JFFS2_FS_XATTR int jffs2_sum_add_xattr_mem(struct jffs2_summary *s, struct jffs2_raw_xattr *rx, uint32_t ofs) { struct jffs2_sum_xattr_mem *temp; temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL); if (!temp) return -ENOMEM; temp->nodetype = rx->nodetype; temp->xid = rx->xid; temp->version = rx->version; temp->offset = cpu_to_je32(ofs); temp->totlen = rx->totlen; temp->next = NULL; return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); } int jffs2_sum_add_xref_mem(struct jffs2_summary *s, struct jffs2_raw_xref *rr, uint32_t ofs) { struct jffs2_sum_xref_mem *temp; temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL); if (!temp) return -ENOMEM; temp->nodetype = rr->nodetype; temp->offset = cpu_to_je32(ofs); temp->next = NULL; return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); } #endif |
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/* Cleanup every collected summary information */ static void jffs2_sum_clean_collected(struct jffs2_summary *s) { union jffs2_sum_mem *temp; if (!s->sum_list_head) { |
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dbg_summary("already empty "); |
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} while (s->sum_list_head) { temp = s->sum_list_head; s->sum_list_head = s->sum_list_head->u.next; kfree(temp); } s->sum_list_tail = NULL; s->sum_padded = 0; s->sum_num = 0; } void jffs2_sum_reset_collected(struct jffs2_summary *s) { |
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dbg_summary("called "); |
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jffs2_sum_clean_collected(s); s->sum_size = 0; } void jffs2_sum_disable_collecting(struct jffs2_summary *s) { |
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dbg_summary("called "); |
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jffs2_sum_clean_collected(s); s->sum_size = JFFS2_SUMMARY_NOSUM_SIZE; } |
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int jffs2_sum_is_disabled(struct jffs2_summary *s) |
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{ return (s->sum_size == JFFS2_SUMMARY_NOSUM_SIZE); } /* Move the collected summary information into sb (called from scan.c) */ void jffs2_sum_move_collected(struct jffs2_sb_info *c, struct jffs2_summary *s) { |
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dbg_summary("oldsize=0x%x oldnum=%u => newsize=0x%x newnum=%u ", |
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c->summary->sum_size, c->summary->sum_num, s->sum_size, s->sum_num); c->summary->sum_size = s->sum_size; c->summary->sum_num = s->sum_num; c->summary->sum_padded = s->sum_padded; c->summary->sum_list_head = s->sum_list_head; c->summary->sum_list_tail = s->sum_list_tail; s->sum_list_head = s->sum_list_tail = NULL; } /* Called from wbuf.c to collect writed node info */ int jffs2_sum_add_kvec(struct jffs2_sb_info *c, const struct kvec *invecs, unsigned long count, uint32_t ofs) { union jffs2_node_union *node; struct jffs2_eraseblock *jeb; |
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if (c->summary->sum_size == JFFS2_SUMMARY_NOSUM_SIZE) { dbg_summary("Summary is disabled for this jeb! Skipping summary info! "); return 0; } |
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node = invecs[0].iov_base; jeb = &c->blocks[ofs / c->sector_size]; ofs -= jeb->offset; switch (je16_to_cpu(node->u.nodetype)) { case JFFS2_NODETYPE_INODE: { struct jffs2_sum_inode_mem *temp = kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL); if (!temp) goto no_mem; temp->nodetype = node->i.nodetype; temp->inode = node->i.ino; temp->version = node->i.version; temp->offset = cpu_to_je32(ofs); temp->totlen = node->i.totlen; temp->next = NULL; return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); } case JFFS2_NODETYPE_DIRENT: { struct jffs2_sum_dirent_mem *temp = kmalloc(sizeof(struct jffs2_sum_dirent_mem) + node->d.nsize, GFP_KERNEL); if (!temp) goto no_mem; temp->nodetype = node->d.nodetype; temp->totlen = node->d.totlen; temp->offset = cpu_to_je32(ofs); temp->pino = node->d.pino; temp->version = node->d.version; temp->ino = node->d.ino; temp->nsize = node->d.nsize; temp->type = node->d.type; temp->next = NULL; switch (count) { case 1: memcpy(temp->name,node->d.name,node->d.nsize); break; case 2: memcpy(temp->name,invecs[1].iov_base,node->d.nsize); break; default: BUG(); /* impossible count value */ break; } return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); } |
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#ifdef CONFIG_JFFS2_FS_XATTR case JFFS2_NODETYPE_XATTR: { struct jffs2_sum_xattr_mem *temp; |
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temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL); if (!temp) goto no_mem; |
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temp->nodetype = node->x.nodetype; temp->xid = node->x.xid; temp->version = node->x.version; temp->totlen = node->x.totlen; temp->offset = cpu_to_je32(ofs); temp->next = NULL; return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); } case JFFS2_NODETYPE_XREF: { struct jffs2_sum_xref_mem *temp; |
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temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL); if (!temp) goto no_mem; temp->nodetype = node->r.nodetype; temp->offset = cpu_to_je32(ofs); temp->next = NULL; return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); } #endif |
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case JFFS2_NODETYPE_PADDING: |
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dbg_summary("node PADDING "); |
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c->summary->sum_padded += je32_to_cpu(node->u.totlen); break; case JFFS2_NODETYPE_CLEANMARKER: |
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dbg_summary("node CLEANMARKER "); |
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break; case JFFS2_NODETYPE_SUMMARY: |
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dbg_summary("node SUMMARY "); |
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break; default: /* If you implement a new node type you should also implement summary support for it or disable summary. */ BUG(); break; } return 0; no_mem: JFFS2_WARNING("MEMORY ALLOCATION ERROR!"); return -ENOMEM; } |
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static struct jffs2_raw_node_ref *sum_link_node_ref(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t ofs, uint32_t len, struct jffs2_inode_cache *ic) |
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{ |
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/* If there was a gap, mark it dirty */ |
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if ((ofs & ~3) > c->sector_size - jeb->free_size) { /* Ew. Summary doesn't actually tell us explicitly about dirty space */ jffs2_scan_dirty_space(c, jeb, (ofs & ~3) - (c->sector_size - jeb->free_size)); |
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} |
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return jffs2_link_node_ref(c, jeb, jeb->offset + ofs, len, ic); |
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} |
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/* Process the stored summary information - helper function for jffs2_sum_scan_sumnode() */ static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, |
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struct jffs2_raw_summary *summary, uint32_t *pseudo_random) |
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{ |
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struct jffs2_inode_cache *ic; struct jffs2_full_dirent *fd; void *sp; int i, ino; |
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int err; |
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sp = summary->sum; for (i=0; i<je32_to_cpu(summary->sum_num); i++) { |
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dbg_summary("processing summary index %d ", i); |
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cond_resched(); |
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/* Make sure there's a spare ref for dirty space */ |
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err = jffs2_prealloc_raw_node_refs(c, jeb, 2); |
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if (err) return err; |
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switch (je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype)) { case JFFS2_NODETYPE_INODE: { struct jffs2_sum_inode_flash *spi; spi = sp; ino = je32_to_cpu(spi->inode); |
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dbg_summary("Inode at 0x%08x-0x%08x ", jeb->offset + je32_to_cpu(spi->offset), |
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jeb->offset + je32_to_cpu(spi->offset) + je32_to_cpu(spi->totlen)); |
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ic = jffs2_scan_make_ino_cache(c, ino); if (!ic) { JFFS2_NOTICE("scan_make_ino_cache failed "); |
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return -ENOMEM; } |
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sum_link_node_ref(c, jeb, je32_to_cpu(spi->offset) | REF_UNCHECKED, PAD(je32_to_cpu(spi->totlen)), ic); |
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*pseudo_random += je32_to_cpu(spi->version); |
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sp += JFFS2_SUMMARY_INODE_SIZE; break; } case JFFS2_NODETYPE_DIRENT: { struct jffs2_sum_dirent_flash *spd; |
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int checkedlen; |
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spd = sp; |
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dbg_summary("Dirent at 0x%08x-0x%08x ", |
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jeb->offset + je32_to_cpu(spd->offset), jeb->offset + je32_to_cpu(spd->offset) + je32_to_cpu(spd->totlen)); |
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/* This should never happen, but https://dev.laptop.org/ticket/4184 */ checkedlen = strnlen(spd->name, spd->nsize); if (!checkedlen) { printk(KERN_ERR "Dirent at %08x has zero at start of name. Aborting mount. ", jeb->offset + je32_to_cpu(spd->offset)); return -EIO; } if (checkedlen < spd->nsize) { printk(KERN_ERR "Dirent at %08x has zeroes in name. Truncating to %d chars ", jeb->offset + je32_to_cpu(spd->offset), checkedlen); } fd = jffs2_alloc_full_dirent(checkedlen+1); |
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if (!fd) |
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return -ENOMEM; |
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memcpy(&fd->name, spd->name, checkedlen); fd->name[checkedlen] = 0; |
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ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(spd->pino)); if (!ic) { jffs2_free_full_dirent(fd); |
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return -ENOMEM; } |
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fd->raw = sum_link_node_ref(c, jeb, je32_to_cpu(spd->offset) | REF_UNCHECKED, |
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PAD(je32_to_cpu(spd->totlen)), ic); |
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fd->next = NULL; fd->version = je32_to_cpu(spd->version); fd->ino = je32_to_cpu(spd->ino); |
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fd->nhash = full_name_hash(fd->name, checkedlen); |
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fd->type = spd->type; |
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jffs2_add_fd_to_list(c, fd, &ic->scan_dents); *pseudo_random += je32_to_cpu(spd->version); sp += JFFS2_SUMMARY_DIRENT_SIZE(spd->nsize); break; } |
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#ifdef CONFIG_JFFS2_FS_XATTR case JFFS2_NODETYPE_XATTR: { struct jffs2_xattr_datum *xd; struct jffs2_sum_xattr_flash *spx; |
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spx = (struct jffs2_sum_xattr_flash *)sp; |
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dbg_summary("xattr at %#08x-%#08x (xid=%u, version=%u) ", |
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jeb->offset + je32_to_cpu(spx->offset), |
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jeb->offset + je32_to_cpu(spx->offset) + je32_to_cpu(spx->totlen), |
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je32_to_cpu(spx->xid), je32_to_cpu(spx->version)); |
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xd = jffs2_setup_xattr_datum(c, je32_to_cpu(spx->xid), je32_to_cpu(spx->version)); |
c9f700f84 [JFFS2][XATTR] us... |
508 |
if (IS_ERR(xd)) |
aa98d7cf5 [JFFS2][XATTR] XA... |
509 |
return PTR_ERR(xd); |
c9f700f84 [JFFS2][XATTR] us... |
510 511 512 513 514 515 516 517 518 519 520 |
if (xd->version > je32_to_cpu(spx->version)) { /* node is not the newest one */ struct jffs2_raw_node_ref *raw = sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED, PAD(je32_to_cpu(spx->totlen)), NULL); raw->next_in_ino = xd->node->next_in_ino; xd->node->next_in_ino = raw; } else { xd->version = je32_to_cpu(spx->version); sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED, PAD(je32_to_cpu(spx->totlen)), (void *)xd); |
aa98d7cf5 [JFFS2][XATTR] XA... |
521 |
} |
aa98d7cf5 [JFFS2][XATTR] XA... |
522 |
*pseudo_random += je32_to_cpu(spx->xid); |
aa98d7cf5 [JFFS2][XATTR] XA... |
523 524 525 526 527 528 529 |
sp += JFFS2_SUMMARY_XATTR_SIZE; break; } case JFFS2_NODETYPE_XREF: { struct jffs2_xattr_ref *ref; struct jffs2_sum_xref_flash *spr; |
aa98d7cf5 [JFFS2][XATTR] XA... |
530 531 |
spr = (struct jffs2_sum_xref_flash *)sp; |
9167e0f81 [JFFS2] Remove st... |
532 533 |
dbg_summary("xref at %#08x-%#08x ", |
49f11d407 [JFFS2] Mark gaps... |
534 |
jeb->offset + je32_to_cpu(spr->offset), |
9bfeb691e [JFFS2] Switch to... |
535 536 |
jeb->offset + je32_to_cpu(spr->offset) + (uint32_t)PAD(sizeof(struct jffs2_raw_xref))); |
9167e0f81 [JFFS2] Remove st... |
537 |
|
aa98d7cf5 [JFFS2][XATTR] XA... |
538 539 540 541 |
ref = jffs2_alloc_xattr_ref(); if (!ref) { JFFS2_NOTICE("allocation of xattr_datum failed "); |
aa98d7cf5 [JFFS2][XATTR] XA... |
542 543 |
return -ENOMEM; } |
8f2b6f49c [JFFS2][XATTR] Re... |
544 545 |
ref->next = c->xref_temp; c->xref_temp = ref; |
aa98d7cf5 [JFFS2][XATTR] XA... |
546 |
|
c9f700f84 [JFFS2][XATTR] us... |
547 548 |
sum_link_node_ref(c, jeb, je32_to_cpu(spr->offset) | REF_UNCHECKED, PAD(sizeof(struct jffs2_raw_xref)), (void *)ref); |
aa98d7cf5 [JFFS2][XATTR] XA... |
549 |
|
2f785402f [JFFS2] Reduce vi... |
550 |
*pseudo_random += ref->node->flash_offset; |
aa98d7cf5 [JFFS2][XATTR] XA... |
551 |
sp += JFFS2_SUMMARY_XREF_SIZE; |
e631ddba5 [JFFS2] Add erase... |
552 |
|
aa98d7cf5 [JFFS2][XATTR] XA... |
553 554 555 |
break; } #endif |
e631ddba5 [JFFS2] Add erase... |
556 |
default : { |
7807ef7ba [JFFS2] Fix summa... |
557 558 559 560 561 562 563 564 565 566 567 568 569 |
uint16_t nodetype = je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype); JFFS2_WARNING("Unsupported node type %x found in summary! Exiting... ", nodetype); if ((nodetype & JFFS2_COMPAT_MASK) == JFFS2_FEATURE_INCOMPAT) return -EIO; /* For compatible node types, just fall back to the full scan */ c->wasted_size -= jeb->wasted_size; c->free_size += c->sector_size - jeb->free_size; c->used_size -= jeb->used_size; c->dirty_size -= jeb->dirty_size; jeb->wasted_size = jeb->used_size = jeb->dirty_size = 0; jeb->free_size = c->sector_size; |
c38c1b613 [JFFS2] jffs2_fre... |
570 |
jffs2_free_jeb_node_refs(c, jeb); |
7807ef7ba [JFFS2] Fix summa... |
571 |
return -ENOTRECOVERABLE; |
e631ddba5 [JFFS2] Add erase... |
572 573 574 |
} } } |
e631ddba5 [JFFS2] Add erase... |
575 576 577 578 |
return 0; } /* Process the summary node - called from jffs2_scan_eraseblock() */ |
e631ddba5 [JFFS2] Add erase... |
579 |
int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, |
9641b784f [JFFS2] Optimise ... |
580 581 |
struct jffs2_raw_summary *summary, uint32_t sumsize, uint32_t *pseudo_random) |
e631ddba5 [JFFS2] Add erase... |
582 583 |
{ struct jffs2_unknown_node crcnode; |
9641b784f [JFFS2] Optimise ... |
584 |
int ret, ofs; |
e631ddba5 [JFFS2] Add erase... |
585 |
uint32_t crc; |
49f11d407 [JFFS2] Mark gaps... |
586 |
ofs = c->sector_size - sumsize; |
e631ddba5 [JFFS2] Add erase... |
587 |
|
733802d97 [JFFS2] Debug cod... |
588 589 |
dbg_summary("summary found for 0x%08x at 0x%08x (0x%x bytes) ", |
49f11d407 [JFFS2] Mark gaps... |
590 |
jeb->offset, jeb->offset + ofs, sumsize); |
e631ddba5 [JFFS2] Add erase... |
591 592 593 594 595 596 597 598 |
/* OK, now check for node validity and CRC */ crcnode.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); crcnode.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY); crcnode.totlen = summary->totlen; crc = crc32(0, &crcnode, sizeof(crcnode)-4); if (je32_to_cpu(summary->hdr_crc) != crc) { |
733802d97 [JFFS2] Debug cod... |
599 |
dbg_summary("Summary node header is corrupt (bad CRC or " |
e631ddba5 [JFFS2] Add erase... |
600 601 602 603 604 605 |
"no summary at all) "); goto crc_err; } if (je32_to_cpu(summary->totlen) != sumsize) { |
733802d97 [JFFS2] Debug cod... |
606 607 |
dbg_summary("Summary node is corrupt (wrong erasesize?) "); |
e631ddba5 [JFFS2] Add erase... |
608 609 |
goto crc_err; } |
2bc9764c4 [JFFS2] Rename jf... |
610 |
crc = crc32(0, summary, sizeof(struct jffs2_raw_summary)-8); |
e631ddba5 [JFFS2] Add erase... |
611 612 |
if (je32_to_cpu(summary->node_crc) != crc) { |
733802d97 [JFFS2] Debug cod... |
613 614 |
dbg_summary("Summary node is corrupt (bad CRC) "); |
e631ddba5 [JFFS2] Add erase... |
615 616 |
goto crc_err; } |
2bc9764c4 [JFFS2] Rename jf... |
617 |
crc = crc32(0, summary->sum, sumsize - sizeof(struct jffs2_raw_summary)); |
e631ddba5 [JFFS2] Add erase... |
618 619 |
if (je32_to_cpu(summary->sum_crc) != crc) { |
733802d97 [JFFS2] Debug cod... |
620 621 |
dbg_summary("Summary node data is corrupt (bad CRC) "); |
e631ddba5 [JFFS2] Add erase... |
622 623 624 625 |
goto crc_err; } if ( je32_to_cpu(summary->cln_mkr) ) { |
733802d97 [JFFS2] Debug cod... |
626 627 |
dbg_summary("Summary : CLEANMARKER node "); |
e631ddba5 [JFFS2] Add erase... |
628 |
|
098a19811 [JFFS2] Prealloca... |
629 630 631 |
ret = jffs2_prealloc_raw_node_refs(c, jeb, 1); if (ret) return ret; |
e631ddba5 [JFFS2] Add erase... |
632 |
if (je32_to_cpu(summary->cln_mkr) != c->cleanmarker_size) { |
733802d97 [JFFS2] Debug cod... |
633 634 |
dbg_summary("CLEANMARKER node has totlen 0x%x != normal 0x%x ", |
e631ddba5 [JFFS2] Add erase... |
635 |
je32_to_cpu(summary->cln_mkr), c->cleanmarker_size); |
098a19811 [JFFS2] Prealloca... |
636 637 |
if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr))))) return ret; |
e631ddba5 [JFFS2] Add erase... |
638 |
} else if (jeb->first_node) { |
733802d97 [JFFS2] Debug cod... |
639 |
dbg_summary("CLEANMARKER node not first node in block " |
e631ddba5 [JFFS2] Add erase... |
640 641 |
"(0x%08x) ", jeb->offset); |
098a19811 [JFFS2] Prealloca... |
642 643 |
if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr))))) return ret; |
e631ddba5 [JFFS2] Add erase... |
644 |
} else { |
2f785402f [JFFS2] Reduce vi... |
645 646 |
jffs2_link_node_ref(c, jeb, jeb->offset | REF_NORMAL, je32_to_cpu(summary->cln_mkr), NULL); |
e631ddba5 [JFFS2] Add erase... |
647 648 |
} } |
e631ddba5 [JFFS2] Add erase... |
649 |
ret = jffs2_sum_process_sum_data(c, jeb, summary, pseudo_random); |
7807ef7ba [JFFS2] Fix summa... |
650 651 652 653 |
/* -ENOTRECOVERABLE isn't a fatal error -- it means we should do a full scan of this eraseblock. So return zero */ if (ret == -ENOTRECOVERABLE) return 0; |
e631ddba5 [JFFS2] Add erase... |
654 |
if (ret) |
7807ef7ba [JFFS2] Fix summa... |
655 |
return ret; /* real error */ |
e631ddba5 [JFFS2] Add erase... |
656 657 |
/* for PARANOIA_CHECK */ |
046b8b980 [JFFS2] Add 'jeb'... |
658 |
ret = jffs2_prealloc_raw_node_refs(c, jeb, 2); |
2f785402f [JFFS2] Reduce vi... |
659 660 |
if (ret) return ret; |
e631ddba5 [JFFS2] Add erase... |
661 |
|
f61579c33 [JFFS2] Correctly... |
662 |
sum_link_node_ref(c, jeb, ofs | REF_NORMAL, sumsize, NULL); |
e631ddba5 [JFFS2] Add erase... |
663 |
|
49f11d407 [JFFS2] Mark gaps... |
664 665 666 667 668 669 670 671 672 |
if (unlikely(jeb->free_size)) { JFFS2_WARNING("Free size 0x%x bytes in eraseblock @0x%08x with summary? ", jeb->free_size, jeb->offset); jeb->wasted_size += jeb->free_size; c->wasted_size += jeb->free_size; c->free_size -= jeb->free_size; jeb->free_size = 0; } |
e631ddba5 [JFFS2] Add erase... |
673 674 675 676 677 678 679 680 681 682 683 684 685 |
return jffs2_scan_classify_jeb(c, jeb); crc_err: JFFS2_WARNING("Summary node crc error, skipping summary information. "); return 0; } /* Write summary data to flash - helper function for jffs2_sum_write_sumnode() */ static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, |
b7600dba6 [JFFS2] Fix alloc... |
686 |
uint32_t infosize, uint32_t datasize, int padsize) |
e631ddba5 [JFFS2] Add erase... |
687 |
{ |
2bc9764c4 [JFFS2] Rename jf... |
688 |
struct jffs2_raw_summary isum; |
e631ddba5 [JFFS2] Add erase... |
689 690 691 |
union jffs2_sum_mem *temp; struct jffs2_sum_marker *sm; struct kvec vecs[2]; |
2f785402f [JFFS2] Reduce vi... |
692 |
uint32_t sum_ofs; |
e631ddba5 [JFFS2] Add erase... |
693 694 695 |
void *wpage; int ret; size_t retlen; |
b7600dba6 [JFFS2] Fix alloc... |
696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 |
if (padsize + datasize > MAX_SUMMARY_SIZE) { /* It won't fit in the buffer. Abort summary for this jeb */ jffs2_sum_disable_collecting(c->summary); JFFS2_WARNING("Summary too big (%d data, %d pad) in eraseblock at %08x ", datasize, padsize, jeb->offset); /* Non-fatal */ return 0; } /* Is there enough space for summary? */ if (padsize < 0) { /* don't try to write out summary for this jeb */ jffs2_sum_disable_collecting(c->summary); JFFS2_WARNING("Not enough space for summary, padsize = %d ", padsize); /* Non-fatal */ return 0; } |
e631ddba5 [JFFS2] Add erase... |
717 718 719 720 721 722 723 724 725 726 727 728 729 |
memset(c->summary->sum_buf, 0xff, datasize); memset(&isum, 0, sizeof(isum)); isum.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); isum.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY); isum.totlen = cpu_to_je32(infosize); isum.hdr_crc = cpu_to_je32(crc32(0, &isum, sizeof(struct jffs2_unknown_node) - 4)); isum.padded = cpu_to_je32(c->summary->sum_padded); isum.cln_mkr = cpu_to_je32(c->cleanmarker_size); isum.sum_num = cpu_to_je32(c->summary->sum_num); wpage = c->summary->sum_buf; while (c->summary->sum_num) { |
20ffdcb00 [JFFS2] Remove nu... |
730 |
temp = c->summary->sum_list_head; |
e631ddba5 [JFFS2] Add erase... |
731 |
|
20ffdcb00 [JFFS2] Remove nu... |
732 |
switch (je16_to_cpu(temp->u.nodetype)) { |
e631ddba5 [JFFS2] Add erase... |
733 734 |
case JFFS2_NODETYPE_INODE: { struct jffs2_sum_inode_flash *sino_ptr = wpage; |
20ffdcb00 [JFFS2] Remove nu... |
735 736 737 738 739 |
sino_ptr->nodetype = temp->i.nodetype; sino_ptr->inode = temp->i.inode; sino_ptr->version = temp->i.version; sino_ptr->offset = temp->i.offset; sino_ptr->totlen = temp->i.totlen; |
e631ddba5 [JFFS2] Add erase... |
740 741 742 743 744 745 746 747 |
wpage += JFFS2_SUMMARY_INODE_SIZE; break; } case JFFS2_NODETYPE_DIRENT: { struct jffs2_sum_dirent_flash *sdrnt_ptr = wpage; |
20ffdcb00 [JFFS2] Remove nu... |
748 749 750 751 752 753 754 755 |
sdrnt_ptr->nodetype = temp->d.nodetype; sdrnt_ptr->totlen = temp->d.totlen; sdrnt_ptr->offset = temp->d.offset; sdrnt_ptr->pino = temp->d.pino; sdrnt_ptr->version = temp->d.version; sdrnt_ptr->ino = temp->d.ino; sdrnt_ptr->nsize = temp->d.nsize; sdrnt_ptr->type = temp->d.type; |
e631ddba5 [JFFS2] Add erase... |
756 |
|
20ffdcb00 [JFFS2] Remove nu... |
757 758 |
memcpy(sdrnt_ptr->name, temp->d.name, temp->d.nsize); |
e631ddba5 [JFFS2] Add erase... |
759 |
|
20ffdcb00 [JFFS2] Remove nu... |
760 |
wpage += JFFS2_SUMMARY_DIRENT_SIZE(temp->d.nsize); |
e631ddba5 [JFFS2] Add erase... |
761 762 763 |
break; } |
aa98d7cf5 [JFFS2][XATTR] XA... |
764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 |
#ifdef CONFIG_JFFS2_FS_XATTR case JFFS2_NODETYPE_XATTR: { struct jffs2_sum_xattr_flash *sxattr_ptr = wpage; temp = c->summary->sum_list_head; sxattr_ptr->nodetype = temp->x.nodetype; sxattr_ptr->xid = temp->x.xid; sxattr_ptr->version = temp->x.version; sxattr_ptr->offset = temp->x.offset; sxattr_ptr->totlen = temp->x.totlen; wpage += JFFS2_SUMMARY_XATTR_SIZE; break; } case JFFS2_NODETYPE_XREF: { struct jffs2_sum_xref_flash *sxref_ptr = wpage; temp = c->summary->sum_list_head; sxref_ptr->nodetype = temp->r.nodetype; sxref_ptr->offset = temp->r.offset; |
e631ddba5 [JFFS2] Add erase... |
784 |
|
aa98d7cf5 [JFFS2][XATTR] XA... |
785 786 787 788 |
wpage += JFFS2_SUMMARY_XREF_SIZE; break; } #endif |
e631ddba5 [JFFS2] Add erase... |
789 |
default : { |
6171586a7 [JFFS2] Correct h... |
790 791 792 793 794 795 796 797 798 |
if ((je16_to_cpu(temp->u.nodetype) & JFFS2_COMPAT_MASK) == JFFS2_FEATURE_RWCOMPAT_COPY) { dbg_summary("Writing unknown RWCOMPAT_COPY node type %x ", je16_to_cpu(temp->u.nodetype)); jffs2_sum_disable_collecting(c->summary); } else { BUG(); /* unknown node in summary information */ } |
e631ddba5 [JFFS2] Add erase... |
799 800 |
} } |
20ffdcb00 [JFFS2] Remove nu... |
801 |
c->summary->sum_list_head = temp->u.next; |
e631ddba5 [JFFS2] Add erase... |
802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 |
kfree(temp); c->summary->sum_num--; } jffs2_sum_reset_collected(c->summary); wpage += padsize; sm = wpage; sm->offset = cpu_to_je32(c->sector_size - jeb->free_size); sm->magic = cpu_to_je32(JFFS2_SUM_MAGIC); isum.sum_crc = cpu_to_je32(crc32(0, c->summary->sum_buf, datasize)); isum.node_crc = cpu_to_je32(crc32(0, &isum, sizeof(isum) - 8)); vecs[0].iov_base = &isum; vecs[0].iov_len = sizeof(isum); vecs[1].iov_base = c->summary->sum_buf; vecs[1].iov_len = datasize; |
2f785402f [JFFS2] Reduce vi... |
822 |
sum_ofs = jeb->offset + c->sector_size - jeb->free_size; |
733802d97 [JFFS2] Debug cod... |
823 824 |
dbg_summary("JFFS2: writing out data to flash to pos : 0x%08x ", |
2f785402f [JFFS2] Reduce vi... |
825 |
sum_ofs); |
e631ddba5 [JFFS2] Add erase... |
826 |
|
2f785402f [JFFS2] Reduce vi... |
827 |
ret = jffs2_flash_writev(c, vecs, 2, sum_ofs, &retlen, 0); |
e631ddba5 [JFFS2] Add erase... |
828 829 |
if (ret || (retlen != infosize)) { |
010b06d6d [JFFS2] Locking i... |
830 |
|
c41ff6e5f [JFFS2] Fix print... |
831 832 |
JFFS2_WARNING("Write of %u bytes at 0x%08x failed. returned %d, retlen %zd ", |
2f785402f [JFFS2] Reduce vi... |
833 |
infosize, sum_ofs, ret, retlen); |
e631ddba5 [JFFS2] Add erase... |
834 |
|
9bfeb691e [JFFS2] Switch to... |
835 836 837 838 839 840 |
if (retlen) { /* Waste remaining space */ spin_lock(&c->erase_completion_lock); jffs2_link_node_ref(c, jeb, sum_ofs | REF_OBSOLETE, infosize, NULL); spin_unlock(&c->erase_completion_lock); } |
010b06d6d [JFFS2] Locking i... |
841 |
|
e631ddba5 [JFFS2] Add erase... |
842 |
c->summary->sum_size = JFFS2_SUMMARY_NOSUM_SIZE; |
e631ddba5 [JFFS2] Add erase... |
843 |
|
2f785402f [JFFS2] Reduce vi... |
844 |
return 0; |
e631ddba5 [JFFS2] Add erase... |
845 |
} |
010b06d6d [JFFS2] Locking i... |
846 |
spin_lock(&c->erase_completion_lock); |
2f785402f [JFFS2] Reduce vi... |
847 848 |
jffs2_link_node_ref(c, jeb, sum_ofs | REF_NORMAL, infosize, NULL); spin_unlock(&c->erase_completion_lock); |
010b06d6d [JFFS2] Locking i... |
849 |
|
e631ddba5 [JFFS2] Add erase... |
850 851 852 853 854 855 856 |
return 0; } /* Write out summary information - called from jffs2_do_reserve_space */ int jffs2_sum_write_sumnode(struct jffs2_sb_info *c) { |
2f785402f [JFFS2] Reduce vi... |
857 |
int datasize, infosize, padsize; |
e631ddba5 [JFFS2] Add erase... |
858 |
struct jffs2_eraseblock *jeb; |
b7600dba6 [JFFS2] Fix alloc... |
859 |
int ret = 0; |
e631ddba5 [JFFS2] Add erase... |
860 |
|
733802d97 [JFFS2] Debug cod... |
861 862 |
dbg_summary("called "); |
e631ddba5 [JFFS2] Add erase... |
863 |
|
2f785402f [JFFS2] Reduce vi... |
864 |
spin_unlock(&c->erase_completion_lock); |
2f785402f [JFFS2] Reduce vi... |
865 |
|
e631ddba5 [JFFS2] Add erase... |
866 |
jeb = c->nextblock; |
046b8b980 [JFFS2] Add 'jeb'... |
867 |
jffs2_prealloc_raw_node_refs(c, jeb, 1); |
e631ddba5 [JFFS2] Add erase... |
868 869 870 871 872 873 874 875 |
if (!c->summary->sum_num || !c->summary->sum_list_head) { JFFS2_WARNING("Empty summary info!!! "); BUG(); } datasize = c->summary->sum_size + sizeof(struct jffs2_sum_marker); |
2bc9764c4 [JFFS2] Rename jf... |
876 |
infosize = sizeof(struct jffs2_raw_summary) + datasize; |
e631ddba5 [JFFS2] Add erase... |
877 |
padsize = jeb->free_size - infosize; |
182ec4eee [JFFS2] Clean up ... |
878 |
infosize += padsize; |
e631ddba5 [JFFS2] Add erase... |
879 |
datasize += padsize; |
e631ddba5 [JFFS2] Add erase... |
880 |
ret = jffs2_sum_write_data(c, jeb, infosize, datasize, padsize); |
010b06d6d [JFFS2] Locking i... |
881 |
spin_lock(&c->erase_completion_lock); |
2f785402f [JFFS2] Reduce vi... |
882 |
return ret; |
e631ddba5 [JFFS2] Add erase... |
883 |
} |