static int rtems_jffs2_rmnod(
const rtems_filesystem_location_info_t *parentloc,
const rtems_filesystem_location_info_t *loc
)
{
struct _inode *dir_i = rtems_jffs2_get_inode_by_location(parentloc);
struct _inode *entry_i = rtems_jffs2_get_inode_by_location(loc);
char *name;
size_t namelen;
int eno = rtems_jffs2_cache_fd_name(entry_i, &name, &namelen);
if (eno == 0) {
switch (dir_i->i_mode & S_IFMT) {
case S_IFDIR:
eno = -jffs2_rmdir(dir_i, entry_i, name, namelen);
break;
case S_IFREG:
eno = -jffs2_unlink(dir_i, entry_i, name, namelen);
break;
default:
eno = EINVAL;
break;
}
}
return rtems_jffs2_eno_to_rv_and_errno(eno);
}
static bool rtems_jffs2_are_nodes_equal(
const rtems_filesystem_location_info_t *a,
const rtems_filesystem_location_info_t *b
)
{
struct _inode *inode_a = rtems_jffs2_get_inode_by_location(a);
struct _inode *inode_b = rtems_jffs2_get_inode_by_location(b);
return inode_a->i_ino == inode_b->i_ino;
}
static int rtems_jffs2_link(
const rtems_filesystem_location_info_t *parentloc,
const rtems_filesystem_location_info_t *targetloc,
const char *name,
size_t namelen
)
{
struct _inode *old_d_inode = rtems_jffs2_get_inode_by_location(targetloc);
struct _inode *dir_i = rtems_jffs2_get_inode_by_location(parentloc);
int eno;
eno = -jffs2_link(old_d_inode, dir_i, name, namelen);
return rtems_jffs2_eno_to_rv_and_errno(eno);
}
static int rtems_jffs2_mknod(
const rtems_filesystem_location_info_t *parentloc,
const char *name,
size_t namelen,
mode_t mode,
dev_t dev
)
{
struct _inode *dir_i = rtems_jffs2_get_inode_by_location(parentloc);
int eno;
switch (mode & S_IFMT) {
case S_IFDIR:
eno = -jffs2_mknod(dir_i, name, namelen, mode, NULL, 0);
break;
case S_IFREG:
eno = -jffs2_create(dir_i, name, namelen, mode);
break;
default:
eno = EINVAL;
break;
}
return rtems_jffs2_eno_to_rv_and_errno(eno);
}
static int rtems_jffs2_fstat(
const rtems_filesystem_location_info_t *loc,
struct stat *buf
)
{
struct _inode *inode = rtems_jffs2_get_inode_by_location(loc);
struct super_block *sb = inode->i_sb;
rtems_jffs2_flash_control *fc = sb->s_flash_control;
rtems_jffs2_do_lock(sb);
buf->st_dev = fc->device_identifier;
buf->st_blksize = PAGE_SIZE;
buf->st_mode = inode->i_mode;
buf->st_ino = inode->i_ino;
buf->st_nlink = inode->i_nlink;
buf->st_uid = inode->i_uid;
buf->st_gid = inode->i_gid;
buf->st_size = inode->i_size;
buf->st_atime = inode->i_atime;
buf->st_mtime = inode->i_mtime;
buf->st_ctime = inode->i_ctime;
rtems_jffs2_do_unlock(sb);
return 0;
}
static int rtems_jffs2_clonenode(rtems_filesystem_location_info_t *loc)
{
struct _inode *inode = rtems_jffs2_get_inode_by_location(loc);
++inode->i_count;
return 0;
}
static bool rtems_jffs2_eval_is_directory(
rtems_filesystem_eval_path_context_t *ctx,
void *arg
)
{
rtems_filesystem_location_info_t *currentloc =
rtems_filesystem_eval_path_get_currentloc(ctx);
struct _inode *inode = rtems_jffs2_get_inode_by_location(currentloc);
return S_ISDIR(inode->i_mode);
}
static int rtems_jffs2_rename(
const rtems_filesystem_location_info_t *oldparentloc,
const rtems_filesystem_location_info_t *oldloc,
const rtems_filesystem_location_info_t *newparentloc,
const char *name,
size_t namelen
)
{
struct _inode *old_dir_i = rtems_jffs2_get_inode_by_location(oldparentloc);
struct _inode *new_dir_i = rtems_jffs2_get_inode_by_location(newparentloc);
struct _inode *d_inode = rtems_jffs2_get_inode_by_location(oldloc);
char *oldname;
size_t oldnamelen;
int eno = rtems_jffs2_cache_fd_name(d_inode, &oldname, &oldnamelen);
if (eno == 0) {
eno = -jffs2_rename(old_dir_i, d_inode, oldname, oldnamelen, new_dir_i, name, namelen);
}
return rtems_jffs2_eno_to_rv_and_errno(eno);
}
static int rtems_jffs2_fchmod(
const rtems_filesystem_location_info_t *loc,
mode_t mode
)
{
struct _inode *inode = rtems_jffs2_get_inode_by_location(loc);
struct iattr iattr;
int eno;
iattr.ia_valid = ATTR_MODE | ATTR_CTIME;
iattr.ia_mode = mode;
iattr.ia_ctime = get_seconds();
eno = -jffs2_do_setattr(inode, &iattr);
return rtems_jffs2_eno_to_rv_and_errno(eno);
}
static int rtems_jffs2_chown(
const rtems_filesystem_location_info_t *loc,
uid_t owner,
gid_t group
)
{
struct _inode *inode = rtems_jffs2_get_inode_by_location(loc);
struct iattr iattr;
int eno;
iattr.ia_valid = ATTR_UID | ATTR_GID | ATTR_CTIME;
iattr.ia_uid = owner;
iattr.ia_gid = group;
iattr.ia_ctime = get_seconds();
eno = -jffs2_do_setattr(inode, &iattr);
return rtems_jffs2_eno_to_rv_and_errno(eno);
}
static rtems_filesystem_node_types_t rtems_jffs2_node_type(
const rtems_filesystem_location_info_t *loc
)
{
struct _inode *inode = rtems_jffs2_get_inode_by_location(loc);
rtems_filesystem_node_types_t type;
switch (inode->i_mode & S_IFMT) {
case S_IFDIR:
type = RTEMS_FILESYSTEM_DIRECTORY;
break;
case S_IFREG:
type = RTEMS_FILESYSTEM_MEMORY_FILE;
break;
case S_IFLNK:
type = RTEMS_FILESYSTEM_SYM_LINK;
break;
default:
type = RTEMS_FILESYSTEM_INVALID_NODE_TYPE;
break;
}
return type;
}
static int rtems_jffs2_fstat(
const rtems_filesystem_location_info_t *loc,
struct stat *buf
)
{
struct _inode *inode = rtems_jffs2_get_inode_by_location(loc);
rtems_jffs2_do_lock(inode->i_sb);
buf->st_blksize = PAGE_SIZE;
buf->st_mode = inode->i_mode;
buf->st_ino = inode->i_ino;
buf->st_nlink = inode->i_nlink;
buf->st_uid = inode->i_uid;
buf->st_gid = inode->i_gid;
buf->st_size = inode->i_size;
buf->st_atime = inode->i_atime;
buf->st_mtime = inode->i_mtime;
buf->st_ctime = inode->i_ctime;
rtems_jffs2_do_unlock(inode->i_sb);
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;
}
size_t oldnamelen;
int eno = rtems_jffs2_cache_fd_name(d_inode, &oldname, &oldnamelen);
if (eno == 0) {
eno = -jffs2_rename(old_dir_i, d_inode, oldname, oldnamelen, new_dir_i, name, namelen);
}
return rtems_jffs2_eno_to_rv_and_errno(eno);
}
static int rtems_jffs2_statvfs(
const rtems_filesystem_location_info_t *__restrict loc,
struct statvfs *__restrict buf
)
{
struct _inode *inode = rtems_jffs2_get_inode_by_location(loc);
struct super_block *sb = inode->i_sb;
struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
unsigned long avail;
spin_lock(&c->erase_completion_lock);
avail = c->dirty_size + c->free_size;
if (avail > c->sector_size * c->resv_blocks_write) {
avail -= c->sector_size * c->resv_blocks_write;
} else {
avail = 0;
}
spin_unlock(&c->erase_completion_lock);
buf->f_bavail = avail >> PAGE_SHIFT;
buf->f_blocks = c->flash_size >> PAGE_SHIFT;
