static void rtems_jffs2_fsunmount(rtems_filesystem_mount_table_entry_t *mt_entry)
{
rtems_jffs2_fs_info *fs_info = mt_entry->fs_info;
struct _inode *root_i = mt_entry->mt_fs_root->location.node_access;
icache_evict(root_i, NULL);
assert(root_i->i_cache_next == NULL);
assert(root_i->i_count == 1);
jffs2_iput(root_i);
rtems_jffs2_free_directory_entries(root_i);
free(root_i);
rtems_jffs2_free_fs_info(fs_info, true);
}
int jffs2_create(struct _inode *dir_i, const unsigned char *d_name, int mode,
struct _inode **new_i)
{
struct jffs2_raw_inode *ri;
struct jffs2_inode_info *f, *dir_f;
struct jffs2_sb_info *c;
struct _inode *inode;
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"));
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);
return PTR_ERR(inode);
}
f = JFFS2_INODE_INFO(inode);
dir_f = JFFS2_INODE_INFO(dir_i);
ret = jffs2_do_create(c, dir_f, f, ri,
(const char *)d_name,
strlen((char *)d_name));
if (ret) {
inode->i_nlink = 0;
jffs2_iput(inode);
jffs2_free_raw_inode(ri);
return ret;
}
jffs2_free_raw_inode(ri);
D1(printk(KERN_DEBUG "jffs2_create: Created ino #%lu with mode %o, nlink %d(%d)\n",
inode->i_ino, inode->i_mode, inode->i_nlink, f->inocache->nlink));
*new_i = inode;
return 0;
}
static void rtems_jffs2_freenode(const rtems_filesystem_location_info_t *loc)
{
struct _inode *inode = rtems_jffs2_get_inode_by_location(loc);
jffs2_iput(inode);
}
static rtems_filesystem_eval_path_generic_status rtems_jffs2_eval_token(
rtems_filesystem_eval_path_context_t *ctx,
void *arg,
const char *token,
size_t tokenlen
)
{
rtems_filesystem_eval_path_generic_status status =
RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_DONE;
rtems_filesystem_location_info_t *currentloc =
rtems_filesystem_eval_path_get_currentloc(ctx);
struct _inode *dir_i = rtems_jffs2_get_inode_by_location(currentloc);
bool access_ok = rtems_filesystem_eval_path_check_access(
ctx,
RTEMS_FS_PERMS_EXEC,
dir_i->i_mode,
dir_i->i_uid,
dir_i->i_gid
);
if (access_ok) {
struct _inode *entry_i;
if (rtems_filesystem_is_current_directory(token, tokenlen)) {
entry_i = dir_i;
++entry_i->i_count;
} else if (rtems_filesystem_is_parent_directory(token, tokenlen)) {
entry_i = dir_i->i_parent;
++entry_i->i_count;
} else {
entry_i = jffs2_lookup(dir_i, token, (int) tokenlen);
}
if (IS_ERR(entry_i)) {
rtems_filesystem_eval_path_error(ctx, PTR_ERR(entry_i));
} else if (entry_i != NULL) {
bool terminal = !rtems_filesystem_eval_path_has_path(ctx);
int eval_flags = rtems_filesystem_eval_path_get_flags(ctx);
bool follow_sym_link = (eval_flags & RTEMS_FS_FOLLOW_SYM_LINK) != 0;
rtems_filesystem_eval_path_clear_token(ctx);
if (S_ISLNK(entry_i->i_mode) && (follow_sym_link || !terminal)) {
struct jffs2_inode_info *f = JFFS2_INODE_INFO(entry_i);
const char *target = f->target;
rtems_filesystem_eval_path_recursive(ctx, target, strlen(target));
jffs2_iput(entry_i);
} else {
if (S_ISDIR(entry_i->i_mode) && entry_i->i_parent == NULL) {
entry_i->i_parent = dir_i;
++dir_i->i_count;
}
jffs2_iput(dir_i);
rtems_jffs2_set_location(currentloc, entry_i);
if (rtems_filesystem_eval_path_has_path(ctx)) {
status = RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_CONTINUE;
}
}
} else {
status = RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_NO_ENTRY;
}
}
return status;
}
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;
}
