static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
{
struct jffs2_inode_info *f, *dir_f;
struct jffs2_sb_info *c;
struct inode *inode;
struct jffs2_raw_inode *ri;
struct jffs2_raw_dirent *rd;
struct jffs2_full_dnode *fn;
struct jffs2_full_dirent *fd;
int namelen;
uint32_t alloclen;
int ret;
mode |= S_IFDIR;
ri = jffs2_alloc_raw_inode();
if (!ri)
return -ENOMEM;
c = JFFS2_SB_INFO(dir_i->i_sb);
/* Try to reserve enough space for both node and dirent.
* Just the node will do for now, though
*/
namelen = dentry->d_name.len;
ret = jffs2_reserve_space(c, sizeof(*ri), &alloclen, ALLOC_NORMAL,
JFFS2_SUMMARY_INODE_SIZE);
if (ret) {
jffs2_free_raw_inode(ri);
return ret;
}
inode = jffs2_new_inode(dir_i, mode, ri);
if (IS_ERR(inode)) {
jffs2_free_raw_inode(ri);
jffs2_complete_reservation(c);
return PTR_ERR(inode);
}
inode->i_op = &jffs2_dir_inode_operations;
inode->i_fop = &jffs2_dir_operations;
f = JFFS2_INODE_INFO(inode);
/* Directories get nlink 2 at start */
inode->i_nlink = 2;
/* but ic->pino_nlink is the parent ino# */
f->inocache->pino_nlink = dir_i->i_ino;
ri->data_crc = cpu_to_je32(0);
ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
fn = jffs2_write_dnode(c, f, ri, NULL, 0, ALLOC_NORMAL);
jffs2_free_raw_inode(ri);
if (IS_ERR(fn)) {
/* Eeek. Wave bye bye */
mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
ret = PTR_ERR(fn);
goto fail;
}
/* No data here. Only a metadata node, which will be
obsoleted by the first data write
*/
f->metadata = fn;
mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
ret = jffs2_init_security(inode, dir_i, &dentry->d_name);
if (ret)
goto fail;
ret = jffs2_init_acl_post(inode);
if (ret)
goto fail;
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
if (ret)
goto fail;
rd = jffs2_alloc_raw_dirent();
if (!rd) {
/* Argh. Now we treat it like a normal delete */
jffs2_complete_reservation(c);
ret = -ENOMEM;
goto fail;
}
dir_f = JFFS2_INODE_INFO(dir_i);
mutex_lock(&dir_f->sem);
rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
rd->pino = cpu_to_je32(dir_i->i_ino);
rd->version = cpu_to_je32(++dir_f->highest_version);
rd->ino = cpu_to_je32(inode->i_ino);
rd->mctime = cpu_to_je32(get_seconds());
rd->nsize = namelen;
rd->type = DT_DIR;
rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);
if (IS_ERR(fd)) {
/* dirent failed to write. Delete the inode normally
as if it were the final unlink() */
jffs2_complete_reservation(c);
jffs2_free_raw_dirent(rd);
mutex_unlock(&dir_f->sem);
ret = PTR_ERR(fd);
goto fail;
}
dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
inc_nlink(dir_i);
jffs2_free_raw_dirent(rd);
/* Link the fd into the inode's list, obsoleting an old
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
mutex_unlock(&dir_f->sem);
jffs2_complete_reservation(c);
d_instantiate(dentry, inode);
unlock_new_inode(inode);
return 0;
fail:
iget_failed(inode);
return ret;
}
static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_raw_summary *summary, uint32_t *pseudo_random)
{
struct jffs2_inode_cache *ic;
struct jffs2_full_dirent *fd;
void *sp;
int i, ino;
int err;
sp = summary->sum;
for (i=0; i<je32_to_cpu(summary->sum_num); i++) {
dbg_summary("processing summary index %d\n", i);
cond_resched();
/* Make sure there's a spare ref for dirty space */
err = jffs2_prealloc_raw_node_refs(c, jeb, 2);
if (err)
return err;
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);
dbg_summary("Inode at 0x%08x-0x%08x\n",
jeb->offset + je32_to_cpu(spi->offset),
jeb->offset + je32_to_cpu(spi->offset) + je32_to_cpu(spi->totlen));
ic = jffs2_scan_make_ino_cache(c, ino);
if (!ic) {
JFFS2_NOTICE("scan_make_ino_cache failed\n");
return -ENOMEM;
}
sum_link_node_ref(c, jeb, je32_to_cpu(spi->offset) | REF_UNCHECKED,
PAD(je32_to_cpu(spi->totlen)), ic);
*pseudo_random += je32_to_cpu(spi->version);
sp += JFFS2_SUMMARY_INODE_SIZE;
break;
}
case JFFS2_NODETYPE_DIRENT: {
struct jffs2_sum_dirent_flash *spd;
int checkedlen;
spd = sp;
dbg_summary("Dirent at 0x%08x-0x%08x\n",
jeb->offset + je32_to_cpu(spd->offset),
jeb->offset + je32_to_cpu(spd->offset) + je32_to_cpu(spd->totlen));
/* This should never happen, but https://dev.laptop.org/ticket/4184 */
checkedlen = strnlen(spd->name, spd->nsize);
if (!checkedlen) {
pr_err("Dirent at %08x has zero at start of name. Aborting mount.\n",
jeb->offset +
je32_to_cpu(spd->offset));
return -EIO;
}
if (checkedlen < spd->nsize) {
pr_err("Dirent at %08x has zeroes in name. Truncating to %d chars\n",
jeb->offset +
je32_to_cpu(spd->offset),
checkedlen);
}
fd = jffs2_alloc_full_dirent(checkedlen+1);
if (!fd)
return -ENOMEM;
memcpy(&fd->name, spd->name, checkedlen);
fd->name[checkedlen] = 0;
ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(spd->pino));
if (!ic) {
jffs2_free_full_dirent(fd);
return -ENOMEM;
}
fd->raw = sum_link_node_ref(c, jeb, je32_to_cpu(spd->offset) | REF_UNCHECKED,
PAD(je32_to_cpu(spd->totlen)), ic);
fd->next = NULL;
fd->version = je32_to_cpu(spd->version);
fd->ino = je32_to_cpu(spd->ino);
fd->nhash = full_name_hash(NULL, fd->name, checkedlen);
fd->type = spd->type;
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;
}
#ifdef CONFIG_JFFS2_FS_XATTR
case JFFS2_NODETYPE_XATTR: {
struct jffs2_xattr_datum *xd;
struct jffs2_sum_xattr_flash *spx;
spx = (struct jffs2_sum_xattr_flash *)sp;
dbg_summary("xattr at %#08x-%#08x (xid=%u, version=%u)\n",
jeb->offset + je32_to_cpu(spx->offset),
jeb->offset + je32_to_cpu(spx->offset) + je32_to_cpu(spx->totlen),
je32_to_cpu(spx->xid), je32_to_cpu(spx->version));
xd = jffs2_setup_xattr_datum(c, je32_to_cpu(spx->xid),
je32_to_cpu(spx->version));
if (IS_ERR(xd))
return PTR_ERR(xd);
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);
}
*pseudo_random += je32_to_cpu(spx->xid);
sp += JFFS2_SUMMARY_XATTR_SIZE;
break;
}
case JFFS2_NODETYPE_XREF: {
struct jffs2_xattr_ref *ref;
struct jffs2_sum_xref_flash *spr;
spr = (struct jffs2_sum_xref_flash *)sp;
dbg_summary("xref at %#08x-%#08x\n",
jeb->offset + je32_to_cpu(spr->offset),
jeb->offset + je32_to_cpu(spr->offset) +
(uint32_t)PAD(sizeof(struct jffs2_raw_xref)));
ref = jffs2_alloc_xattr_ref();
if (!ref) {
JFFS2_NOTICE("allocation of xattr_datum failed\n");
return -ENOMEM;
}
ref->next = c->xref_temp;
c->xref_temp = ref;
sum_link_node_ref(c, jeb, je32_to_cpu(spr->offset) | REF_UNCHECKED,
PAD(sizeof(struct jffs2_raw_xref)), (void *)ref);
*pseudo_random += ref->node->flash_offset;
sp += JFFS2_SUMMARY_XREF_SIZE;
break;
}
#endif
default : {
uint16_t nodetype = je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype);
JFFS2_WARNING("Unsupported node type %x found in summary! Exiting...\n", 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;
jffs2_free_jeb_node_refs(c, jeb);
return -ENOTRECOVERABLE;
}
}
}
return 0;
}
static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char *target)
{
struct jffs2_inode_info *f, *dir_f;
struct jffs2_sb_info *c;
struct inode *inode;
struct jffs2_raw_inode *ri;
struct jffs2_raw_dirent *rd;
struct jffs2_full_dnode *fn;
struct jffs2_full_dirent *fd;
int namelen;
uint32_t alloclen;
int ret, targetlen = strlen(target);
/* FIXME: If you care. We'd need to use frags for the target
if it grows much more than this */
if (targetlen > 254)
return -ENAMETOOLONG;
ri = jffs2_alloc_raw_inode();
if (!ri)
return -ENOMEM;
c = JFFS2_SB_INFO(dir_i->i_sb);
/* Try to reserve enough space for both node and dirent.
* Just the node will do for now, though
*/
namelen = dentry->d_name.len;
ret = jffs2_reserve_space(c, sizeof(*ri) + targetlen, &alloclen,
ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);
if (ret) {
jffs2_free_raw_inode(ri);
return ret;
}
inode = jffs2_new_inode(dir_i, S_IFLNK | S_IRWXUGO, ri);
if (IS_ERR(inode)) {
jffs2_free_raw_inode(ri);
jffs2_complete_reservation(c);
return PTR_ERR(inode);
}
inode->i_op = &jffs2_symlink_inode_operations;
f = JFFS2_INODE_INFO(inode);
inode->i_size = targetlen;
ri->isize = ri->dsize = ri->csize = cpu_to_je32(inode->i_size);
ri->totlen = cpu_to_je32(sizeof(*ri) + inode->i_size);
ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));
ri->compr = JFFS2_COMPR_NONE;
ri->data_crc = cpu_to_je32(crc32(0, target, targetlen));
ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
fn = jffs2_write_dnode(c, f, ri, target, targetlen, ALLOC_NORMAL);
jffs2_free_raw_inode(ri);
if (IS_ERR(fn)) {
/* Eeek. Wave bye bye */
mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
ret = PTR_ERR(fn);
goto fail;
}
/* We use f->target field to store the target path. */
f->target = kmemdup(target, targetlen + 1, GFP_KERNEL);
if (!f->target) {
;
mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
ret = -ENOMEM;
goto fail;
}
D1(printk(KERN_DEBUG "jffs2_symlink: symlink's target '%s' cached\n", (char *)f->target));
/* No data here. Only a metadata node, which will be
obsoleted by the first data write
*/
f->metadata = fn;
mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
ret = jffs2_init_security(inode, dir_i, &dentry->d_name);
if (ret)
goto fail;
ret = jffs2_init_acl_post(inode);
if (ret)
goto fail;
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
if (ret)
goto fail;
rd = jffs2_alloc_raw_dirent();
if (!rd) {
/* Argh. Now we treat it like a normal delete */
jffs2_complete_reservation(c);
ret = -ENOMEM;
goto fail;
}
dir_f = JFFS2_INODE_INFO(dir_i);
mutex_lock(&dir_f->sem);
rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
rd->pino = cpu_to_je32(dir_i->i_ino);
rd->version = cpu_to_je32(++dir_f->highest_version);
rd->ino = cpu_to_je32(inode->i_ino);
rd->mctime = cpu_to_je32(get_seconds());
rd->nsize = namelen;
rd->type = DT_LNK;
rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);
if (IS_ERR(fd)) {
/* dirent failed to write. Delete the inode normally
as if it were the final unlink() */
jffs2_complete_reservation(c);
jffs2_free_raw_dirent(rd);
mutex_unlock(&dir_f->sem);
ret = PTR_ERR(fd);
goto fail;
}
dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
jffs2_free_raw_dirent(rd);
/* Link the fd into the inode's list, obsoleting an old
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
mutex_unlock(&dir_f->sem);
jffs2_complete_reservation(c);
d_instantiate(dentry, inode);
unlock_new_inode(inode);
return 0;
fail:
iget_failed(inode);
return ret;
}
static int jffs2_scan_dirent_node(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_raw_dirent *rd, uint32_t ofs, struct jffs2_summary *s)
{
struct jffs2_full_dirent *fd;
struct jffs2_inode_cache *ic;
uint32_t checkedlen;
uint32_t crc;
int err;
D1(printk(KERN_DEBUG "jffs2_scan_dirent_node(): Node at 0x%08x\n", ofs));
/* We don't get here unless the node is still valid, so we don't have to
mask in the ACCURATE bit any more. */
crc = crc32(0, rd, sizeof(*rd)-8);
if (crc != je32_to_cpu(rd->node_crc)) {
printk(KERN_NOTICE "jffs2_scan_dirent_node(): Node CRC failed on node at 0x%08x: Read 0x%08x, calculated 0x%08x\n",
ofs, je32_to_cpu(rd->node_crc), crc);
/* We believe totlen because the CRC on the node _header_ was OK, just the node itself failed. */
if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(rd->totlen)))))
return err;
return 0;
}
pseudo_random += je32_to_cpu(rd->version);
/* Should never happen. Did. (OLPC trac #4184)*/
checkedlen = strnlen(rd->name, rd->nsize);
if (checkedlen < rd->nsize) {
printk(KERN_ERR "Dirent at %08x has zeroes in name. Truncating to %d chars\n",
ofs, checkedlen);
}
fd = jffs2_alloc_full_dirent(checkedlen+1);
if (!fd) {
return -ENOMEM;
}
memcpy(&fd->name, rd->name, checkedlen);
fd->name[checkedlen] = 0;
crc = crc32(0, fd->name, rd->nsize);
if (crc != je32_to_cpu(rd->name_crc)) {
printk(KERN_NOTICE "jffs2_scan_dirent_node(): Name CRC failed on node at 0x%08x: Read 0x%08x, calculated 0x%08x\n",
ofs, je32_to_cpu(rd->name_crc), crc);
D1(printk(KERN_NOTICE "Name for which CRC failed is (now) '%s', ino #%d\n", fd->name, je32_to_cpu(rd->ino)));
jffs2_free_full_dirent(fd);
/* FIXME: Why do we believe totlen? */
/* We believe totlen because the CRC on the node _header_ was OK, just the name failed. */
if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(rd->totlen)))))
return err;
return 0;
}
ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(rd->pino));
if (!ic) {
jffs2_free_full_dirent(fd);
return -ENOMEM;
}
fd->raw = jffs2_link_node_ref(c, jeb, ofs | dirent_node_state(rd),
PAD(je32_to_cpu(rd->totlen)), ic);
fd->next = NULL;
fd->version = je32_to_cpu(rd->version);
fd->ino = je32_to_cpu(rd->ino);
fd->nhash = full_name_hash(fd->name, checkedlen);
fd->type = rd->type;
jffs2_add_fd_to_list(c, fd, &ic->scan_dents);
if (jffs2_sum_active()) {
jffs2_sum_add_dirent_mem(s, rd, ofs - jeb->offset);
}
return 0;
}
/*
* Helper function for jffs2_get_inode_nodes().
* It is called every time an directory entry node is found.
*
* Returns: 0 on succes;
* 1 if the node should be marked obsolete;
* negative error code on failure.
*/
static inline int read_direntry(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *ref,
struct jffs2_raw_dirent *rd, size_t read, struct jffs2_full_dirent **fdp,
uint32_t *latest_mctime, uint32_t *mctime_ver)
{
struct jffs2_full_dirent *fd;
/* The direntry nodes are checked during the flash scanning */
BUG_ON(ref_flags(ref) == REF_UNCHECKED);
/* Obsoleted. This cannot happen, surely? dwmw2 20020308 */
BUG_ON(ref_obsolete(ref));
/* Sanity check */
if (unlikely(PAD((rd->nsize + sizeof(*rd))) != PAD(je32_to_cpu(rd->totlen)))) {
JFFS2_ERROR("illegal nsize in node at %#08x: nsize %#02x, totlen %#04x\n",
ref_offset(ref), rd->nsize, je32_to_cpu(rd->totlen));
return 1;
}
fd = jffs2_alloc_full_dirent(rd->nsize + 1);
if (unlikely(!fd))
return -ENOMEM;
fd->raw = ref;
fd->version = je32_to_cpu(rd->version);
fd->ino = je32_to_cpu(rd->ino);
fd->type = rd->type;
/* Pick out the mctime of the latest dirent */
if(fd->version > *mctime_ver && je32_to_cpu(rd->mctime)) {
*mctime_ver = fd->version;
*latest_mctime = je32_to_cpu(rd->mctime);
}
/*
* Copy as much of the name as possible from the raw
* dirent we've already read from the flash.
*/
if (read > sizeof(*rd))
memcpy(&fd->name[0], &rd->name[0],
min_t(uint32_t, rd->nsize, (read - sizeof(*rd)) ));
/* Do we need to copy any more of the name directly from the flash? */
if (rd->nsize + sizeof(*rd) > read) {
/* FIXME: point() */
int err;
int already = read - sizeof(*rd);
err = jffs2_flash_read(c, (ref_offset(ref)) + read,
rd->nsize - already, &read, &fd->name[already]);
if (unlikely(read != rd->nsize - already) && likely(!err))
return -EIO;
if (unlikely(err)) {
JFFS2_ERROR("read remainder of name: error %d\n", err);
jffs2_free_full_dirent(fd);
return -EIO;
}
}
fd->nhash = full_name_hash(fd->name, rd->nsize);
fd->next = NULL;
fd->name[rd->nsize] = '\0';
/*
* Wheee. We now have a complete jffs2_full_dirent structure, with
* the name in it and everything. Link it into the list
*/
jffs2_add_fd_to_list(c, fd, fdp);
return 0;
}
static int jffs2_scan_dirent_node(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_raw_dirent *rd, uint32_t ofs, struct jffs2_summary *s)
{
struct jffs2_full_dirent *fd;
struct jffs2_inode_cache *ic;
uint32_t checkedlen;
uint32_t crc;
int err;
jffs2_dbg(1, "%s(): Node at 0x%08x\n", __func__, ofs);
crc = crc32(0, rd, sizeof(*rd)-8);
if (crc != je32_to_cpu(rd->node_crc)) {
pr_notice("%s(): Node CRC failed on node at 0x%08x: Read 0x%08x, calculated 0x%08x\n",
__func__, ofs, je32_to_cpu(rd->node_crc), crc);
if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(rd->totlen)))))
return err;
return 0;
}
pseudo_random += je32_to_cpu(rd->version);
checkedlen = strnlen(rd->name, rd->nsize);
if (checkedlen < rd->nsize) {
pr_err("Dirent at %08x has zeroes in name. Truncating to %d chars\n",
ofs, checkedlen);
}
fd = jffs2_alloc_full_dirent(checkedlen+1);
if (!fd) {
return -ENOMEM;
}
memcpy(&fd->name, rd->name, checkedlen);
fd->name[checkedlen] = 0;
crc = crc32(0, fd->name, rd->nsize);
if (crc != je32_to_cpu(rd->name_crc)) {
pr_notice("%s(): Name CRC failed on node at 0x%08x: Read 0x%08x, calculated 0x%08x\n",
__func__, ofs, je32_to_cpu(rd->name_crc), crc);
jffs2_dbg(1, "Name for which CRC failed is (now) '%s', ino #%d\n",
fd->name, je32_to_cpu(rd->ino));
jffs2_free_full_dirent(fd);
if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(rd->totlen)))))
return err;
return 0;
}
ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(rd->pino));
if (!ic) {
jffs2_free_full_dirent(fd);
return -ENOMEM;
}
fd->raw = jffs2_link_node_ref(c, jeb, ofs | dirent_node_state(rd),
PAD(je32_to_cpu(rd->totlen)), ic);
fd->next = NULL;
fd->version = je32_to_cpu(rd->version);
fd->ino = je32_to_cpu(rd->ino);
fd->nhash = full_name_hash(fd->name, checkedlen);
fd->type = rd->type;
jffs2_add_fd_to_list(c, fd, &ic->scan_dents);
if (jffs2_sum_active()) {
jffs2_sum_add_dirent_mem(s, rd, ofs - jeb->offset);
}
return 0;
}
/*
* Helper function for jffs2_get_inode_nodes().
* It is called every time an directory entry node is found.
*
* Returns: 0 on success;
* negative error code on failure.
*/
static inline int read_direntry(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *ref,
struct jffs2_raw_dirent *rd, size_t read,
struct jffs2_readinode_info *rii)
{
struct jffs2_full_dirent *fd;
uint32_t crc;
/* Obsoleted. This cannot happen, surely? dwmw2 20020308 */
BUG_ON(ref_obsolete(ref));
crc = crc32(0, rd, sizeof(*rd) - 8);
if (unlikely(crc != je32_to_cpu(rd->node_crc))) {
JFFS2_NOTICE("header CRC failed on dirent node at %#08x: read %#08x, calculated %#08x\n",
ref_offset(ref), je32_to_cpu(rd->node_crc), crc);
jffs2_mark_node_obsolete(c, ref);
return 0;
}
/* If we've never checked the CRCs on this node, check them now */
if (ref_flags(ref) == REF_UNCHECKED) {
struct jffs2_eraseblock *jeb;
int len;
/* Sanity check */
if (unlikely(PAD((rd->nsize + sizeof(*rd))) != PAD(je32_to_cpu(rd->totlen)))) {
JFFS2_ERROR("illegal nsize in node at %#08x: nsize %#02x, totlen %#04x\n",
ref_offset(ref), rd->nsize, je32_to_cpu(rd->totlen));
jffs2_mark_node_obsolete(c, ref);
return 0;
}
jeb = &c->blocks[ref->flash_offset / c->sector_size];
len = ref_totlen(c, jeb, ref);
spin_lock(&c->erase_completion_lock);
jeb->used_size += len;
jeb->unchecked_size -= len;
c->used_size += len;
c->unchecked_size -= len;
ref->flash_offset = ref_offset(ref) | dirent_node_state(rd);
spin_unlock(&c->erase_completion_lock);
}
fd = jffs2_alloc_full_dirent(rd->nsize + 1);
if (unlikely(!fd))
return -ENOMEM;
fd->raw = ref;
fd->version = je32_to_cpu(rd->version);
fd->ino = je32_to_cpu(rd->ino);
fd->type = rd->type;
if (fd->version > rii->highest_version)
rii->highest_version = fd->version;
/* Pick out the mctime of the latest dirent */
if(fd->version > rii->mctime_ver && je32_to_cpu(rd->mctime)) {
rii->mctime_ver = fd->version;
rii->latest_mctime = je32_to_cpu(rd->mctime);
}
/*
* Copy as much of the name as possible from the raw
* dirent we've already read from the flash.
*/
if (read > sizeof(*rd))
memcpy(&fd->name[0], &rd->name[0],
min_t(uint32_t, rd->nsize, (read - sizeof(*rd)) ));
/* Do we need to copy any more of the name directly from the flash? */
if (rd->nsize + sizeof(*rd) > read) {
/* FIXME: point() */
int err;
int already = read - sizeof(*rd);
err = jffs2_flash_read(c, (ref_offset(ref)) + read,
rd->nsize - already, &read, &fd->name[already]);
if (unlikely(read != rd->nsize - already) && likely(!err))
return -EIO;
if (unlikely(err)) {
JFFS2_ERROR("read remainder of name: error %d\n", err);
jffs2_free_full_dirent(fd);
return -EIO;
}
}
fd->nhash = full_name_hash(fd->name, rd->nsize);
fd->next = NULL;
fd->name[rd->nsize] = '\0';
/*
* Wheee. We now have a complete jffs2_full_dirent structure, with
* the name in it and everything. Link it into the list
*/
jffs2_add_fd_to_list(c, fd, &rii->fds);
return 0;
}
static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char *target)
{
struct jffs2_inode_info *f, *dir_f;
struct jffs2_sb_info *c;
struct inode *inode;
struct jffs2_raw_inode *ri;
struct jffs2_raw_dirent *rd;
struct jffs2_full_dnode *fn;
struct jffs2_full_dirent *fd;
int namelen;
__u32 alloclen, phys_ofs;
__u32 writtenlen;
int ret;
/* FIXME: If you care. We'd need to use frags for the target
if it grows much more than this */
if (strlen(target) > 254)
return -EINVAL;
ri = jffs2_alloc_raw_inode();
if (!ri)
return -ENOMEM;
c = JFFS2_SB_INFO(dir_i->i_sb);
/* Try to reserve enough space for both node and dirent.
* Just the node will do for now, though
*/
namelen = dentry->d_name.len;
ret = jffs2_reserve_space(c, sizeof(*ri) + strlen(target), &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
jffs2_free_raw_inode(ri);
return ret;
}
inode = jffs2_new_inode(dir_i, S_IFLNK | S_IRWXUGO, ri);
if (IS_ERR(inode)) {
jffs2_free_raw_inode(ri);
jffs2_complete_reservation(c);
return PTR_ERR(inode);
}
inode->i_op = &jffs2_symlink_inode_operations;
f = JFFS2_INODE_INFO(inode);
inode->i_size = ri->isize = ri->dsize = ri->csize = strlen(target);
ri->totlen = sizeof(*ri) + ri->dsize;
ri->hdr_crc = crc32(0, ri, sizeof(struct jffs2_unknown_node)-4);
ri->compr = JFFS2_COMPR_NONE;
ri->data_crc = crc32(0, target, strlen(target));
ri->node_crc = crc32(0, ri, sizeof(*ri)-8);
fn = jffs2_write_dnode(inode, ri, target, strlen(target), phys_ofs, &writtenlen);
jffs2_free_raw_inode(ri);
if (IS_ERR(fn)) {
/* Eeek. Wave bye bye */
up(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return PTR_ERR(fn);
}
/* No data here. Only a metadata node, which will be
obsoleted by the first data write
*/
f->metadata = fn;
up(&f->sem);
/* Work out where to put the dirent node now. */
writtenlen = (writtenlen+3)&~3;
phys_ofs += writtenlen;
alloclen -= writtenlen;
if (alloclen < sizeof(*rd)+namelen) {
/* Not enough space left in this chunk. Get some more */
jffs2_complete_reservation(c);
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
/* Eep. */
jffs2_clear_inode(inode);
return ret;
}
}
rd = jffs2_alloc_raw_dirent();
if (!rd) {
/* Argh. Now we treat it like a normal delete */
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return -ENOMEM;
}
dir_f = JFFS2_INODE_INFO(dir_i);
down(&dir_f->sem);
rd->magic = JFFS2_MAGIC_BITMASK;
rd->nodetype = JFFS2_NODETYPE_DIRENT;
rd->totlen = sizeof(*rd) + namelen;
rd->hdr_crc = crc32(0, rd, sizeof(struct jffs2_unknown_node)-4);
rd->pino = dir_i->i_ino;
rd->version = ++dir_f->highest_version;
rd->ino = inode->i_ino;
rd->mctime = CURRENT_TIME;
rd->nsize = namelen;
rd->type = DT_LNK;
rd->node_crc = crc32(0, rd, sizeof(*rd)-8);
rd->name_crc = crc32(0, dentry->d_name.name, namelen);
fd = jffs2_write_dirent(dir_i, rd, dentry->d_name.name, namelen, phys_ofs, &writtenlen);
jffs2_complete_reservation(c);
if (IS_ERR(fd)) {
/* dirent failed to write. Delete the inode normally
as if it were the final unlink() */
jffs2_free_raw_dirent(rd);
up(&dir_f->sem);
jffs2_clear_inode(inode);
return PTR_ERR(fd);
}
dir_i->i_mtime = dir_i->i_ctime = rd->mctime;
jffs2_free_raw_dirent(rd);
/* Link the fd into the inode's list, obsoleting an old
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
up(&dir_f->sem);
d_instantiate(dentry, inode);
return 0;
}
static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, int rdev)
{
struct jffs2_inode_info *f, *dir_f;
struct jffs2_sb_info *c;
struct inode *inode;
struct jffs2_raw_inode *ri;
struct jffs2_raw_dirent *rd;
struct jffs2_full_dnode *fn;
struct jffs2_full_dirent *fd;
int namelen;
unsigned short dev;
int devlen = 0;
__u32 alloclen, phys_ofs;
__u32 writtenlen;
int ret;
ri = jffs2_alloc_raw_inode();
if (!ri)
return -ENOMEM;
c = JFFS2_SB_INFO(dir_i->i_sb);
if (S_ISBLK(mode) || S_ISCHR(mode)) {
dev = (MAJOR(to_kdev_t(rdev)) << 8) | MINOR(to_kdev_t(rdev));
devlen = sizeof(dev);
}
/* Try to reserve enough space for both node and dirent.
* Just the node will do for now, though
*/
namelen = dentry->d_name.len;
ret = jffs2_reserve_space(c, sizeof(*ri) + devlen, &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
jffs2_free_raw_inode(ri);
return ret;
}
inode = jffs2_new_inode(dir_i, mode, ri);
if (IS_ERR(inode)) {
jffs2_free_raw_inode(ri);
jffs2_complete_reservation(c);
return PTR_ERR(inode);
}
inode->i_op = &jffs2_file_inode_operations;
init_special_inode(inode, inode->i_mode, rdev);
f = JFFS2_INODE_INFO(inode);
ri->dsize = ri->csize = devlen;
ri->totlen = sizeof(*ri) + ri->csize;
ri->hdr_crc = crc32(0, ri, sizeof(struct jffs2_unknown_node)-4);
ri->compr = JFFS2_COMPR_NONE;
ri->data_crc = crc32(0, &dev, devlen);
ri->node_crc = crc32(0, ri, sizeof(*ri)-8);
fn = jffs2_write_dnode(inode, ri, (char *)&dev, devlen, phys_ofs, &writtenlen);
jffs2_free_raw_inode(ri);
if (IS_ERR(fn)) {
/* Eeek. Wave bye bye */
up(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return PTR_ERR(fn);
}
/* No data here. Only a metadata node, which will be
obsoleted by the first data write
*/
f->metadata = fn;
up(&f->sem);
/* Work out where to put the dirent node now. */
writtenlen = (writtenlen+3)&~3;
phys_ofs += writtenlen;
alloclen -= writtenlen;
if (alloclen < sizeof(*rd)+namelen) {
/* Not enough space left in this chunk. Get some more */
jffs2_complete_reservation(c);
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
/* Eep. */
jffs2_clear_inode(inode);
return ret;
}
}
rd = jffs2_alloc_raw_dirent();
if (!rd) {
/* Argh. Now we treat it like a normal delete */
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return -ENOMEM;
}
dir_f = JFFS2_INODE_INFO(dir_i);
down(&dir_f->sem);
rd->magic = JFFS2_MAGIC_BITMASK;
rd->nodetype = JFFS2_NODETYPE_DIRENT;
rd->totlen = sizeof(*rd) + namelen;
rd->hdr_crc = crc32(0, rd, sizeof(struct jffs2_unknown_node)-4);
rd->pino = dir_i->i_ino;
rd->version = ++dir_f->highest_version;
rd->ino = inode->i_ino;
rd->mctime = CURRENT_TIME;
rd->nsize = namelen;
/* XXX: This is ugly. */
rd->type = (mode & S_IFMT) >> 12;
rd->node_crc = crc32(0, rd, sizeof(*rd)-8);
rd->name_crc = crc32(0, dentry->d_name.name, namelen);
fd = jffs2_write_dirent(dir_i, rd, dentry->d_name.name, namelen, phys_ofs, &writtenlen);
jffs2_complete_reservation(c);
if (IS_ERR(fd)) {
/* dirent failed to write. Delete the inode normally
as if it were the final unlink() */
jffs2_free_raw_dirent(rd);
up(&dir_f->sem);
jffs2_clear_inode(inode);
return PTR_ERR(fd);
}
dir_i->i_mtime = dir_i->i_ctime = rd->mctime;
jffs2_free_raw_dirent(rd);
/* Link the fd into the inode's list, obsoleting an old
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
up(&dir_f->sem);
d_instantiate(dentry, inode);
return 0;
}
static int jffs2_do_unlink(struct inode *dir_i, struct dentry *dentry, int rename)
{
struct jffs2_inode_info *dir_f, *f;
struct jffs2_sb_info *c;
struct jffs2_raw_dirent *rd;
struct jffs2_full_dirent *fd;
__u32 alloclen, phys_ofs;
int ret;
c = JFFS2_SB_INFO(dir_i->i_sb);
rd = jffs2_alloc_raw_dirent();
if (!rd)
return -ENOMEM;
ret = jffs2_reserve_space(c, sizeof(*rd)+dentry->d_name.len, &phys_ofs, &alloclen, ALLOC_DELETION);
if (ret) {
jffs2_free_raw_dirent(rd);
return ret;
}
dir_f = JFFS2_INODE_INFO(dir_i);
down(&dir_f->sem);
/* Build a deletion node */
rd->magic = JFFS2_MAGIC_BITMASK;
rd->nodetype = JFFS2_NODETYPE_DIRENT;
rd->totlen = sizeof(*rd) + dentry->d_name.len;
rd->hdr_crc = crc32(0, rd, sizeof(struct jffs2_unknown_node)-4);
rd->pino = dir_i->i_ino;
rd->version = ++dir_f->highest_version;
rd->ino = 0;
rd->mctime = CURRENT_TIME;
rd->nsize = dentry->d_name.len;
rd->type = DT_UNKNOWN;
rd->node_crc = crc32(0, rd, sizeof(*rd)-8);
rd->name_crc = crc32(0, dentry->d_name.name, dentry->d_name.len);
fd = jffs2_write_dirent(dir_i, rd, dentry->d_name.name, dentry->d_name.len, phys_ofs, NULL);
jffs2_complete_reservation(c);
jffs2_free_raw_dirent(rd);
if (IS_ERR(fd)) {
up(&dir_f->sem);
return PTR_ERR(fd);
}
/* File it. This will mark the old one obsolete. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
up(&dir_f->sem);
if (!rename) {
f = JFFS2_INODE_INFO(dentry->d_inode);
down(&f->sem);
while (f->dents) {
/* There can be only deleted ones */
fd = f->dents;
f->dents = fd->next;
if (fd->ino) {
printk(KERN_WARNING "Deleting inode #%u with active dentry \"%s\"->ino #%u\n",
f->inocache->ino, fd->name, fd->ino);
} else {
D1(printk(KERN_DEBUG "Removing deletion dirent for \"%s\" from dir ino #%u\n", fd->name, f->inocache->ino));
}
jffs2_mark_node_obsolete(c, fd->raw);
jffs2_free_full_dirent(fd);
}
/* Don't oops on unlinking a bad inode */
if (f->inocache)
f->inocache->nlink--;
dentry->d_inode->i_nlink--;
up(&f->sem);
}
return 0;
}
static int jffs2_do_link (struct dentry *old_dentry, struct inode *dir_i, struct dentry *dentry, int rename)
{
struct jffs2_inode_info *dir_f, *f;
struct jffs2_sb_info *c;
struct jffs2_raw_dirent *rd;
struct jffs2_full_dirent *fd;
__u32 alloclen, phys_ofs;
int ret;
c = JFFS2_SB_INFO(dir_i->i_sb);
rd = jffs2_alloc_raw_dirent();
if (!rd)
return -ENOMEM;
ret = jffs2_reserve_space(c, sizeof(*rd)+dentry->d_name.len, &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
jffs2_free_raw_dirent(rd);
return ret;
}
dir_f = JFFS2_INODE_INFO(dir_i);
down(&dir_f->sem);
/* Build a deletion node */
rd->magic = JFFS2_MAGIC_BITMASK;
rd->nodetype = JFFS2_NODETYPE_DIRENT;
rd->totlen = sizeof(*rd) + dentry->d_name.len;
rd->hdr_crc = crc32(0, rd, sizeof(struct jffs2_unknown_node)-4);
rd->pino = dir_i->i_ino;
rd->version = ++dir_f->highest_version;
rd->ino = old_dentry->d_inode->i_ino;
rd->mctime = CURRENT_TIME;
rd->nsize = dentry->d_name.len;
/* XXX: This is ugly. */
rd->type = (old_dentry->d_inode->i_mode & S_IFMT) >> 12;
if (!rd->type) rd->type = DT_REG;
rd->node_crc = crc32(0, rd, sizeof(*rd)-8);
rd->name_crc = crc32(0, dentry->d_name.name, dentry->d_name.len);
fd = jffs2_write_dirent(dir_i, rd, dentry->d_name.name, dentry->d_name.len, phys_ofs, NULL);
jffs2_complete_reservation(c);
jffs2_free_raw_dirent(rd);
if (IS_ERR(fd)) {
up(&dir_f->sem);
return PTR_ERR(fd);
}
/* File it. This will mark the old one obsolete. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
up(&dir_f->sem);
if (!rename) {
f = JFFS2_INODE_INFO(old_dentry->d_inode);
down(&f->sem);
old_dentry->d_inode->i_nlink = ++f->inocache->nlink;
up(&f->sem);
}
return 0;
}
static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode)
{
struct jffs2_inode_info *f, *dir_f;
struct jffs2_sb_info *c;
struct inode *inode;
struct jffs2_raw_inode *ri;
struct jffs2_raw_dirent *rd;
struct jffs2_full_dnode *fn;
struct jffs2_full_dirent *fd;
int namelen;
__u32 alloclen, phys_ofs;
__u32 writtenlen;
int ret;
ri = jffs2_alloc_raw_inode();
if (!ri)
return -ENOMEM;
c = JFFS2_SB_INFO(dir_i->i_sb);
D1(printk(KERN_DEBUG "jffs2_create()\n"));
/* Try to reserve enough space for both node and dirent.
* Just the node will do for now, though
*/
namelen = dentry->d_name.len;
ret = jffs2_reserve_space(c, sizeof(*ri), &phys_ofs, &alloclen, ALLOC_NORMAL);
D1(printk(KERN_DEBUG "jffs2_create(): reserved 0x%x bytes\n", alloclen));
if (ret) {
jffs2_free_raw_inode(ri);
return ret;
}
inode = jffs2_new_inode(dir_i, mode, ri);
if (IS_ERR(inode)) {
D1(printk(KERN_DEBUG "jffs2_new_inode() failed\n"));
jffs2_free_raw_inode(ri);
jffs2_complete_reservation(c);
return PTR_ERR(inode);
}
inode->i_op = &jffs2_file_inode_operations;
inode->i_fop = &jffs2_file_operations;
inode->i_mapping->a_ops = &jffs2_file_address_operations;
inode->i_mapping->nrpages = 0;
f = JFFS2_INODE_INFO(inode);
ri->data_crc = 0;
ri->node_crc = crc32(0, ri, sizeof(*ri)-8);
fn = jffs2_write_dnode(inode, ri, NULL, 0, phys_ofs, &writtenlen);
D1(printk(KERN_DEBUG "jffs2_create created file with mode 0x%x\n", ri->mode));
jffs2_free_raw_inode(ri);
if (IS_ERR(fn)) {
D1(printk(KERN_DEBUG "jffs2_write_dnode() failed\n"));
/* Eeek. Wave bye bye */
up(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return PTR_ERR(fn);
}
/* No data here. Only a metadata node, which will be
obsoleted by the first data write
*/
f->metadata = fn;
/* Work out where to put the dirent node now. */
writtenlen = PAD(writtenlen);
phys_ofs += writtenlen;
alloclen -= writtenlen;
up(&f->sem);
if (alloclen < sizeof(*rd)+namelen) {
/* Not enough space left in this chunk. Get some more */
jffs2_complete_reservation(c);
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
/* Eep. */
D1(printk(KERN_DEBUG "jffs2_reserve_space() for dirent failed\n"));
jffs2_clear_inode(inode);
return ret;
}
}
rd = jffs2_alloc_raw_dirent();
if (!rd) {
/* Argh. Now we treat it like a normal delete */
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return -ENOMEM;
}
dir_f = JFFS2_INODE_INFO(dir_i);
down(&dir_f->sem);
rd->magic = JFFS2_MAGIC_BITMASK;
rd->nodetype = JFFS2_NODETYPE_DIRENT;
rd->totlen = sizeof(*rd) + namelen;
rd->hdr_crc = crc32(0, rd, sizeof(struct jffs2_unknown_node)-4);
rd->pino = dir_i->i_ino;
rd->version = ++dir_f->highest_version;
rd->ino = inode->i_ino;
rd->mctime = CURRENT_TIME;
rd->nsize = namelen;
rd->type = DT_REG;
rd->node_crc = crc32(0, rd, sizeof(*rd)-8);
rd->name_crc = crc32(0, dentry->d_name.name, namelen);
fd = jffs2_write_dirent(dir_i, rd, dentry->d_name.name, namelen, phys_ofs, &writtenlen);
jffs2_complete_reservation(c);
if (IS_ERR(fd)) {
/* dirent failed to write. Delete the inode normally
as if it were the final unlink() */
jffs2_free_raw_dirent(rd);
up(&dir_f->sem);
jffs2_clear_inode(inode);
return PTR_ERR(fd);
}
dir_i->i_mtime = dir_i->i_ctime = rd->mctime;
jffs2_free_raw_dirent(rd);
/* Link the fd into the inode's list, obsoleting an old
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
up(&dir_f->sem);
d_instantiate(dentry, inode);
D1(printk(KERN_DEBUG "jffs2_create: Created ino #%lu with mode %o, nlink %d(%d). nrpages %ld\n",
inode->i_ino, inode->i_mode, inode->i_nlink, f->inocache->nlink, inode->i_mapping->nrpages));
return 0;
}
static int jffs2_scan_dirent_node(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_raw_dirent *rd, uint32_t ofs)
{
struct jffs2_raw_node_ref *raw;
struct jffs2_full_dirent *fd;
struct jffs2_inode_cache *ic;
uint32_t crc;
D1(printk(KERN_DEBUG "jffs2_scan_dirent_node(): Node at 0x%08x\n", ofs));
/* We don't get here unless the node is still valid, so we don't have to
mask in the ACCURATE bit any more. */
crc = crc32(0, rd, sizeof(*rd)-8);
if (crc != je32_to_cpu(rd->node_crc)) {
printk(KERN_NOTICE "jffs2_scan_dirent_node(): Node CRC failed on node at 0x%08x: Read 0x%08x, calculated 0x%08x\n",
ofs, je32_to_cpu(rd->node_crc), crc);
/* We believe totlen because the CRC on the node _header_ was OK, just the node itself failed. */
DIRTY_SPACE(PAD(je32_to_cpu(rd->totlen)));
return 0;
}
pseudo_random += je32_to_cpu(rd->version);
fd = jffs2_alloc_full_dirent(rd->nsize+1);
if (!fd) {
return -ENOMEM;
}
memcpy(&fd->name, rd->name, rd->nsize);
fd->name[rd->nsize] = 0;
crc = crc32(0, fd->name, rd->nsize);
if (crc != je32_to_cpu(rd->name_crc)) {
printk(KERN_NOTICE "jffs2_scan_dirent_node(): Name CRC failed on node at 0x%08x: Read 0x%08x, calculated 0x%08x\n",
ofs, je32_to_cpu(rd->name_crc), crc);
D1(printk(KERN_NOTICE "Name for which CRC failed is (now) '%s', ino #%d\n", fd->name, je32_to_cpu(rd->ino)));
jffs2_free_full_dirent(fd);
/* FIXME: Why do we believe totlen? */
/* We believe totlen because the CRC on the node _header_ was OK, just the name failed. */
DIRTY_SPACE(PAD(je32_to_cpu(rd->totlen)));
return 0;
}
raw = jffs2_alloc_raw_node_ref();
if (!raw) {
jffs2_free_full_dirent(fd);
printk(KERN_NOTICE "jffs2_scan_dirent_node(): allocation of node reference failed\n");
return -ENOMEM;
}
ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(rd->pino));
if (!ic) {
jffs2_free_full_dirent(fd);
jffs2_free_raw_node_ref(raw);
return -ENOMEM;
}
raw->totlen = PAD(je32_to_cpu(rd->totlen));
raw->flash_offset = ofs | REF_PRISTINE;
raw->next_phys = NULL;
raw->next_in_ino = ic->nodes;
ic->nodes = raw;
if (!jeb->first_node)
jeb->first_node = raw;
if (jeb->last_node)
jeb->last_node->next_phys = raw;
jeb->last_node = raw;
fd->raw = raw;
fd->next = NULL;
fd->version = je32_to_cpu(rd->version);
fd->ino = je32_to_cpu(rd->ino);
fd->nhash = full_name_hash(fd->name, rd->nsize);
fd->type = rd->type;
USED_SPACE(PAD(je32_to_cpu(rd->totlen)));
jffs2_add_fd_to_list(c, fd, &ic->scan_dents);
return 0;
}
static int jffs2_scan_dirent_node(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, __u32 *ofs)
{
struct jffs2_raw_node_ref *raw;
struct jffs2_full_dirent *fd;
struct jffs2_inode_cache *ic;
struct jffs2_raw_dirent rd;
__u16 oldnodetype;
int ret;
__u32 crc;
ssize_t retlen;
D1(printk(KERN_DEBUG "jffs2_scan_dirent_node(): Node at 0x%08x\n", *ofs));
ret = c->mtd->read(c->mtd, *ofs, sizeof(rd), &retlen, (char *)&rd);
if (ret) {
printk(KERN_NOTICE "jffs2_scan_dirent_node(): Read error at 0x%08x: %d\n", *ofs, ret);
return ret;
}
if (retlen != sizeof(rd)) {
printk(KERN_NOTICE "Short read: 0x%x bytes at 0x%08x instead of requested %x\n",
retlen, *ofs, sizeof(rd));
return -EIO;
}
/* We sort of assume that the node was accurate when it was
first written to the medium :) */
oldnodetype = rd.nodetype;
rd.nodetype |= JFFS2_NODE_ACCURATE;
crc = crc32(0, &rd, sizeof(rd)-8);
rd.nodetype = oldnodetype;
if (crc != rd.node_crc) {
printk(KERN_NOTICE "jffs2_scan_dirent_node(): Node CRC failed on node at 0x%08x: Read 0x%08x, calculated 0x%08x\n",
*ofs, rd.node_crc, crc);
/* FIXME: Why do we believe totlen? */
DIRTY_SPACE(4);
*ofs += 4;
return 0;
}
pseudo_random += rd.version;
fd = jffs2_alloc_full_dirent(rd.nsize+1);
if (!fd) {
return -ENOMEM;
}
ret = c->mtd->read(c->mtd, *ofs + sizeof(rd), rd.nsize, &retlen, &fd->name[0]);
if (ret) {
jffs2_free_full_dirent(fd);
printk(KERN_NOTICE "jffs2_scan_dirent_node(): Read error at 0x%08x: %d\n",
*ofs + sizeof(rd), ret);
return ret;
}
if (retlen != rd.nsize) {
jffs2_free_full_dirent(fd);
printk(KERN_NOTICE "Short read: 0x%x bytes at 0x%08x instead of requested %x\n",
retlen, *ofs + sizeof(rd), rd.nsize);
return -EIO;
}
crc = crc32(0, fd->name, rd.nsize);
if (crc != rd.name_crc) {
printk(KERN_NOTICE "jffs2_scan_dirent_node(): Name CRC failed on node at 0x%08x: Read 0x%08x, calculated 0x%08x\n",
*ofs, rd.name_crc, crc);
fd->name[rd.nsize]=0;
D1(printk(KERN_NOTICE "Name for which CRC failed is (now) '%s', ino #%d\n", fd->name, rd.ino));
jffs2_free_full_dirent(fd);
/* FIXME: Why do we believe totlen? */
DIRTY_SPACE(PAD(rd.totlen));
*ofs += PAD(rd.totlen);
return 0;
}
raw = jffs2_alloc_raw_node_ref();
if (!raw) {
jffs2_free_full_dirent(fd);
printk(KERN_NOTICE "jffs2_scan_dirent_node(): allocation of node reference failed\n");
return -ENOMEM;
}
ic = jffs2_scan_make_ino_cache(c, rd.pino);
if (!ic) {
jffs2_free_full_dirent(fd);
jffs2_free_raw_node_ref(raw);
return -ENOMEM;
}
raw->totlen = PAD(rd.totlen);
raw->flash_offset = *ofs;
raw->next_phys = NULL;
raw->next_in_ino = ic->nodes;
ic->nodes = raw;
if (!jeb->first_node)
jeb->first_node = raw;
if (jeb->last_node)
jeb->last_node->next_phys = raw;
jeb->last_node = raw;
if (rd.nodetype & JFFS2_NODE_ACCURATE) {
fd->raw = raw;
fd->next = NULL;
fd->version = rd.version;
fd->ino = rd.ino;
fd->name[rd.nsize]=0;
fd->nhash = full_name_hash(fd->name, rd.nsize);
fd->type = rd.type;
USED_SPACE(PAD(rd.totlen));
jffs2_add_fd_to_list(c, fd, &ic->scan->dents);
} else {
raw->flash_offset |= 1;
jffs2_free_full_dirent(fd);
DIRTY_SPACE(PAD(rd.totlen));
}
*ofs += PAD(rd.totlen);
return 0;
}
static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, dev_t rdev)
{
struct jffs2_inode_info *f, *dir_f;
struct jffs2_sb_info *c;
struct inode *inode;
struct jffs2_raw_inode *ri;
struct jffs2_raw_dirent *rd;
struct jffs2_full_dnode *fn;
struct jffs2_full_dirent *fd;
int namelen;
union jffs2_device_node dev;
int devlen = 0;
uint32_t alloclen;
int ret;
if (!new_valid_dev(rdev))
return -EINVAL;
ri = jffs2_alloc_raw_inode();
if (!ri)
return -ENOMEM;
c = JFFS2_SB_INFO(dir_i->i_sb);
if (S_ISBLK(mode) || S_ISCHR(mode))
devlen = jffs2_encode_dev(&dev, rdev);
/* Try to reserve enough space for both node and dirent.
* Just the node will do for now, though
*/
namelen = dentry->d_name.len;
ret = jffs2_reserve_space(c, sizeof(*ri) + devlen, &alloclen,
ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);
if (ret) {
jffs2_free_raw_inode(ri);
return ret;
}
inode = jffs2_new_inode(dir_i, mode, ri);
if (IS_ERR(inode)) {
jffs2_free_raw_inode(ri);
jffs2_complete_reservation(c);
return PTR_ERR(inode);
}
inode->i_op = &jffs2_file_inode_operations;
init_special_inode(inode, inode->i_mode, rdev);
f = JFFS2_INODE_INFO(inode);
ri->dsize = ri->csize = cpu_to_je32(devlen);
ri->totlen = cpu_to_je32(sizeof(*ri) + devlen);
ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));
ri->compr = JFFS2_COMPR_NONE;
ri->data_crc = cpu_to_je32(crc32(0, &dev, devlen));
ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
fn = jffs2_write_dnode(c, f, ri, (char *)&dev, devlen, ALLOC_NORMAL);
jffs2_free_raw_inode(ri);
if (IS_ERR(fn)) {
/* Eeek. Wave bye bye */
mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
ret = PTR_ERR(fn);
goto fail;
}
/* No data here. Only a metadata node, which will be
obsoleted by the first data write
*/
f->metadata = fn;
mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
ret = jffs2_init_security(inode, dir_i, &dentry->d_name);
if (ret)
goto fail;
ret = jffs2_init_acl_post(inode);
if (ret)
goto fail;
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
if (ret)
goto fail;
rd = jffs2_alloc_raw_dirent();
if (!rd) {
/* Argh. Now we treat it like a normal delete */
jffs2_complete_reservation(c);
ret = -ENOMEM;
goto fail;
}
dir_f = JFFS2_INODE_INFO(dir_i);
mutex_lock(&dir_f->sem);
rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
rd->pino = cpu_to_je32(dir_i->i_ino);
rd->version = cpu_to_je32(++dir_f->highest_version);
rd->ino = cpu_to_je32(inode->i_ino);
rd->mctime = cpu_to_je32(get_seconds());
rd->nsize = namelen;
/* XXX: This is ugly. */
rd->type = (mode & S_IFMT) >> 12;
rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);
if (IS_ERR(fd)) {
/* dirent failed to write. Delete the inode normally
as if it were the final unlink() */
jffs2_complete_reservation(c);
jffs2_free_raw_dirent(rd);
mutex_unlock(&dir_f->sem);
ret = PTR_ERR(fd);
goto fail;
}
dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
jffs2_free_raw_dirent(rd);
/* Link the fd into the inode's list, obsoleting an old
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
mutex_unlock(&dir_f->sem);
jffs2_complete_reservation(c);
d_instantiate(dentry, inode);
unlock_new_inode(inode);
return 0;
fail:
iget_failed(inode);
return ret;
}
int jffs2_mkdir (struct _inode *dir_i, const unsigned char *d_name, int mode)
{
struct jffs2_inode_info *f, *dir_f;
struct jffs2_sb_info *c;
struct _inode *inode;
struct jffs2_raw_inode *ri;
struct jffs2_raw_dirent *rd;
struct jffs2_full_dnode *fn;
struct jffs2_full_dirent *fd;
int namelen;
uint32_t alloclen, phys_ofs;
int ret;
mode |= S_IFDIR;
ri = jffs2_alloc_raw_inode();
if (!ri)
return -ENOMEM;
c = JFFS2_SB_INFO(dir_i->i_sb);
/* Try to reserve enough space for both node and dirent.
* Just the node will do for now, though
*/
namelen = strlen((char *)d_name);
ret = jffs2_reserve_space(c, sizeof(*ri), &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
jffs2_free_raw_inode(ri);
return ret;
}
inode = jffs2_new_inode(dir_i, mode, ri);
if (IS_ERR(inode)) {
jffs2_free_raw_inode(ri);
jffs2_complete_reservation(c);
return PTR_ERR(inode);
}
f = JFFS2_INODE_INFO(inode);
ri->data_crc = cpu_to_je32(0);
ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
fn = jffs2_write_dnode(c, f, ri, NULL, 0, phys_ofs, ALLOC_NORMAL);
jffs2_free_raw_inode(ri);
if (IS_ERR(fn)) {
/* Eeek. Wave bye bye */
up(&f->sem);
jffs2_complete_reservation(c);
inode->i_nlink = 0;
jffs2_iput(inode);
return PTR_ERR(fn);
}
/* No data here. Only a metadata node, which will be
obsoleted by the first data write
*/
f->metadata = fn;
up(&f->sem);
jffs2_complete_reservation(c);
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
/* Eep. */
inode->i_nlink = 0;
jffs2_iput(inode);
return ret;
}
rd = jffs2_alloc_raw_dirent();
if (!rd) {
/* Argh. Now we treat it like a normal delete */
jffs2_complete_reservation(c);
inode->i_nlink = 0;
jffs2_iput(inode);
return -ENOMEM;
}
dir_f = JFFS2_INODE_INFO(dir_i);
down(&dir_f->sem);
rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
rd->pino = cpu_to_je32(dir_i->i_ino);
rd->version = cpu_to_je32(++dir_f->highest_version);
rd->ino = cpu_to_je32(inode->i_ino);
rd->mctime = cpu_to_je32(jffs2_get_timestamp());
rd->nsize = namelen;
rd->type = DT_DIR;
rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
rd->name_crc = cpu_to_je32(crc32(0, d_name, namelen));
fd = jffs2_write_dirent(c, dir_f, rd, d_name, namelen, phys_ofs, ALLOC_NORMAL);
jffs2_complete_reservation(c);
jffs2_free_raw_dirent(rd);
if (IS_ERR(fd)) {
/* dirent failed to write. Delete the inode normally
as if it were the final unlink() */
up(&dir_f->sem);
inode->i_nlink = 0;
jffs2_iput(inode);
return PTR_ERR(fd);
}
/* Link the fd into the inode's list, obsoleting an old
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
up(&dir_f->sem);
jffs2_iput(inode);
return 0;
}
int jffs2_mkdir (struct inode *dir_i, struct qstr *d_name, int mode, struct inode **new_i)
{
struct jffs2_inode_info *f, *dir_f;
struct jffs2_sb_info *c;
struct inode *inode;
struct jffs2_raw_inode *ri;
struct jffs2_raw_dirent *rd;
struct jffs2_full_dnode *fn;
struct jffs2_full_dirent *fd;
int namelen;
uint32_t alloclen, phys_ofs;
uint32_t writtenlen;
int ret;
mode |= S_IFDIR;
ri = jffs2_alloc_raw_inode();
if (!ri)
return -ENOMEM;
c = JFFS2_SB_INFO(dir_i->i_sb);
/* Try to reserve enough space for both node and dirent.
* Just the node will do for now, though
*/
namelen = d_name->len;
ret = jffs2_reserve_space(c, sizeof(*ri), &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
jffs2_free_raw_inode(ri);
return ret;
}
inode = jffs2_new_inode(dir_i, mode, ri);
if (IS_ERR(inode)) {
jffs2_free_raw_inode(ri);
jffs2_complete_reservation(c);
return PTR_ERR(inode);
}
f = JFFS2_INODE_INFO(inode);
ri->data_crc = 0;
ri->node_crc = crc32(0, ri, sizeof(*ri)-8);
fn = jffs2_write_dnode(c, f, ri, NULL, 0, phys_ofs, &writtenlen);
jffs2_free_raw_inode(ri);
if (IS_ERR(fn)) {
/* Eeek. Wave bye bye */
up(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return PTR_ERR(fn);
}
/* No data here. Only a metadata node, which will be
obsoleted by the first data write
*/
f->metadata = fn;
up(&f->sem);
/* Work out where to put the dirent node now. */
writtenlen = PAD(writtenlen);
phys_ofs += writtenlen;
alloclen -= writtenlen;
if (alloclen < sizeof(*rd)+namelen) {
/* Not enough space left in this chunk. Get some more */
jffs2_complete_reservation(c);
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
/* Eep. */
jffs2_clear_inode(inode);
return ret;
}
}
rd = jffs2_alloc_raw_dirent();
if (!rd) {
/* Argh. Now we treat it like a normal delete */
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return -ENOMEM;
}
dir_f = JFFS2_INODE_INFO(dir_i);
down(&dir_f->sem);
rd->magic = JFFS2_MAGIC_BITMASK;
rd->nodetype = JFFS2_NODETYPE_DIRENT;
rd->totlen = sizeof(*rd) + namelen;
rd->hdr_crc = crc32(0, rd, sizeof(struct jffs2_unknown_node)-4);
rd->pino = dir_i->i_ino;
rd->version = ++dir_f->highest_version;
rd->ino = inode->i_ino;
rd->mctime = CURRENT_TIME;
rd->nsize = namelen;
rd->type = DT_DIR;
rd->node_crc = crc32(0, rd, sizeof(*rd)-8);
rd->name_crc = crc32(0, d_name->name, namelen);
fd = jffs2_write_dirent(c, dir_f, rd, d_name->name, namelen, phys_ofs, &writtenlen);
jffs2_complete_reservation(c);
jffs2_free_raw_dirent(rd);
if (IS_ERR(fd)) {
/* dirent failed to write. Delete the inode normally
as if it were the final unlink() */
up(&dir_f->sem);
jffs2_clear_inode(inode);
return PTR_ERR(fd);
}
/* Link the fd into the inode's list, obsoleting an old
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
up(&dir_f->sem);
*new_i = inode;
return 0;
}
static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_raw_summary *summary, uint32_t *pseudo_random)
{
struct jffs2_raw_node_ref *raw;
struct jffs2_inode_cache *ic;
struct jffs2_full_dirent *fd;
void *sp;
int i, ino;
sp = summary->sum;
for (i=0; i<je32_to_cpu(summary->sum_num); i++) {
dbg_summary("processing summary index %d\n", i);
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);
dbg_summary("Inode at 0x%08x\n",
jeb->offset + je32_to_cpu(spi->offset));
raw = jffs2_alloc_raw_node_ref();
if (!raw) {
JFFS2_NOTICE("allocation of node reference failed\n");
kfree(summary);
return -ENOMEM;
}
ic = jffs2_scan_make_ino_cache(c, ino);
if (!ic) {
JFFS2_NOTICE("scan_make_ino_cache failed\n");
jffs2_free_raw_node_ref(raw);
kfree(summary);
return -ENOMEM;
}
raw->flash_offset = (jeb->offset + je32_to_cpu(spi->offset)) | REF_UNCHECKED;
raw->__totlen = PAD(je32_to_cpu(spi->totlen));
raw->next_phys = NULL;
raw->next_in_ino = ic->nodes;
ic->nodes = raw;
if (!jeb->first_node)
jeb->first_node = raw;
if (jeb->last_node)
jeb->last_node->next_phys = raw;
jeb->last_node = raw;
*pseudo_random += je32_to_cpu(spi->version);
UNCHECKED_SPACE(PAD(je32_to_cpu(spi->totlen)));
sp += JFFS2_SUMMARY_INODE_SIZE;
break;
}
case JFFS2_NODETYPE_DIRENT: {
struct jffs2_sum_dirent_flash *spd;
spd = sp;
dbg_summary("Dirent at 0x%08x\n",
jeb->offset + je32_to_cpu(spd->offset));
fd = jffs2_alloc_full_dirent(spd->nsize+1);
if (!fd) {
kfree(summary);
return -ENOMEM;
}
memcpy(&fd->name, spd->name, spd->nsize);
fd->name[spd->nsize] = 0;
raw = jffs2_alloc_raw_node_ref();
if (!raw) {
jffs2_free_full_dirent(fd);
JFFS2_NOTICE("allocation of node reference failed\n");
kfree(summary);
return -ENOMEM;
}
ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(spd->pino));
if (!ic) {
jffs2_free_full_dirent(fd);
jffs2_free_raw_node_ref(raw);
kfree(summary);
return -ENOMEM;
}
raw->__totlen = PAD(je32_to_cpu(spd->totlen));
raw->flash_offset = (jeb->offset + je32_to_cpu(spd->offset)) | REF_PRISTINE;
raw->next_phys = NULL;
raw->next_in_ino = ic->nodes;
ic->nodes = raw;
if (!jeb->first_node)
jeb->first_node = raw;
if (jeb->last_node)
jeb->last_node->next_phys = raw;
jeb->last_node = raw;
fd->raw = raw;
fd->next = NULL;
fd->version = je32_to_cpu(spd->version);
fd->ino = je32_to_cpu(spd->ino);
fd->nhash = full_name_hash(fd->name, spd->nsize);
fd->type = spd->type;
USED_SPACE(PAD(je32_to_cpu(spd->totlen)));
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;
}
default : {
JFFS2_WARNING("Unsupported node type found in summary! Exiting...");
kfree(summary);
return -EIO;
}
}
}
kfree(summary);
return 0;
}
