[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/fs/minix/namei.c b/ap/os/linux/linux-3.4.x/fs/minix/namei.c
new file mode 100644
index 0000000..2d0ee17
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/fs/minix/namei.c
@@ -0,0 +1,257 @@
+/*
+ * linux/fs/minix/namei.c
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ */
+
+#include "minix.h"
+
+static int add_nondir(struct dentry *dentry, struct inode *inode)
+{
+ int err = minix_add_link(dentry, inode);
+ if (!err) {
+ d_instantiate(dentry, inode);
+ return 0;
+ }
+ inode_dec_link_count(inode);
+ iput(inode);
+ return err;
+}
+
+static struct dentry *minix_lookup(struct inode * dir, struct dentry *dentry, struct nameidata *nd)
+{
+ struct inode * inode = NULL;
+ ino_t ino;
+
+ if (dentry->d_name.len > minix_sb(dir->i_sb)->s_namelen)
+ return ERR_PTR(-ENAMETOOLONG);
+
+ ino = minix_inode_by_name(dentry);
+ if (ino) {
+ inode = minix_iget(dir->i_sb, ino);
+ if (IS_ERR(inode))
+ return ERR_CAST(inode);
+ }
+ d_add(dentry, inode);
+ return NULL;
+}
+
+static int minix_mknod(struct inode * dir, struct dentry *dentry, umode_t mode, dev_t rdev)
+{
+ int error;
+ struct inode *inode;
+
+ if (!old_valid_dev(rdev))
+ return -EINVAL;
+
+ inode = minix_new_inode(dir, mode, &error);
+
+ if (inode) {
+ minix_set_inode(inode, rdev);
+ mark_inode_dirty(inode);
+ error = add_nondir(dentry, inode);
+ }
+ return error;
+}
+
+static int minix_create(struct inode *dir, struct dentry *dentry, umode_t mode,
+ struct nameidata *nd)
+{
+ return minix_mknod(dir, dentry, mode, 0);
+}
+
+static int minix_symlink(struct inode * dir, struct dentry *dentry,
+ const char * symname)
+{
+ int err = -ENAMETOOLONG;
+ int i = strlen(symname)+1;
+ struct inode * inode;
+
+ if (i > dir->i_sb->s_blocksize)
+ goto out;
+
+ inode = minix_new_inode(dir, S_IFLNK | 0777, &err);
+ if (!inode)
+ goto out;
+
+ minix_set_inode(inode, 0);
+ err = page_symlink(inode, symname, i);
+ if (err)
+ goto out_fail;
+
+ err = add_nondir(dentry, inode);
+out:
+ return err;
+
+out_fail:
+ inode_dec_link_count(inode);
+ iput(inode);
+ goto out;
+}
+
+static int minix_link(struct dentry * old_dentry, struct inode * dir,
+ struct dentry *dentry)
+{
+ struct inode *inode = old_dentry->d_inode;
+
+ inode->i_ctime = CURRENT_TIME_SEC;
+ inode_inc_link_count(inode);
+ ihold(inode);
+ return add_nondir(dentry, inode);
+}
+
+static int minix_mkdir(struct inode * dir, struct dentry *dentry, umode_t mode)
+{
+ struct inode * inode;
+ int err;
+
+ inode_inc_link_count(dir);
+
+ inode = minix_new_inode(dir, S_IFDIR | mode, &err);
+ if (!inode)
+ goto out_dir;
+
+ minix_set_inode(inode, 0);
+
+ inode_inc_link_count(inode);
+
+ err = minix_make_empty(inode, dir);
+ if (err)
+ goto out_fail;
+
+ err = minix_add_link(dentry, inode);
+ if (err)
+ goto out_fail;
+
+ d_instantiate(dentry, inode);
+out:
+ return err;
+
+out_fail:
+ inode_dec_link_count(inode);
+ inode_dec_link_count(inode);
+ iput(inode);
+out_dir:
+ inode_dec_link_count(dir);
+ goto out;
+}
+
+static int minix_unlink(struct inode * dir, struct dentry *dentry)
+{
+ int err = -ENOENT;
+ struct inode * inode = dentry->d_inode;
+ struct page * page;
+ struct minix_dir_entry * de;
+
+ de = minix_find_entry(dentry, &page);
+ if (!de)
+ goto end_unlink;
+
+ err = minix_delete_entry(de, page);
+ if (err)
+ goto end_unlink;
+
+ inode->i_ctime = dir->i_ctime;
+ inode_dec_link_count(inode);
+end_unlink:
+ return err;
+}
+
+static int minix_rmdir(struct inode * dir, struct dentry *dentry)
+{
+ struct inode * inode = dentry->d_inode;
+ int err = -ENOTEMPTY;
+
+ if (minix_empty_dir(inode)) {
+ err = minix_unlink(dir, dentry);
+ if (!err) {
+ inode_dec_link_count(dir);
+ inode_dec_link_count(inode);
+ }
+ }
+ return err;
+}
+
+static int minix_rename(struct inode * old_dir, struct dentry *old_dentry,
+ struct inode * new_dir, struct dentry *new_dentry)
+{
+ struct inode * old_inode = old_dentry->d_inode;
+ struct inode * new_inode = new_dentry->d_inode;
+ struct page * dir_page = NULL;
+ struct minix_dir_entry * dir_de = NULL;
+ struct page * old_page;
+ struct minix_dir_entry * old_de;
+ int err = -ENOENT;
+
+ old_de = minix_find_entry(old_dentry, &old_page);
+ if (!old_de)
+ goto out;
+
+ if (S_ISDIR(old_inode->i_mode)) {
+ err = -EIO;
+ dir_de = minix_dotdot(old_inode, &dir_page);
+ if (!dir_de)
+ goto out_old;
+ }
+
+ if (new_inode) {
+ struct page * new_page;
+ struct minix_dir_entry * new_de;
+
+ err = -ENOTEMPTY;
+ if (dir_de && !minix_empty_dir(new_inode))
+ goto out_dir;
+
+ err = -ENOENT;
+ new_de = minix_find_entry(new_dentry, &new_page);
+ if (!new_de)
+ goto out_dir;
+ minix_set_link(new_de, new_page, old_inode);
+ new_inode->i_ctime = CURRENT_TIME_SEC;
+ if (dir_de)
+ drop_nlink(new_inode);
+ inode_dec_link_count(new_inode);
+ } else {
+ err = minix_add_link(new_dentry, old_inode);
+ if (err)
+ goto out_dir;
+ if (dir_de)
+ inode_inc_link_count(new_dir);
+ }
+
+ minix_delete_entry(old_de, old_page);
+ mark_inode_dirty(old_inode);
+
+ if (dir_de) {
+ minix_set_link(dir_de, dir_page, new_dir);
+ inode_dec_link_count(old_dir);
+ }
+ return 0;
+
+out_dir:
+ if (dir_de) {
+ kunmap(dir_page);
+ page_cache_release(dir_page);
+ }
+out_old:
+ kunmap(old_page);
+ page_cache_release(old_page);
+out:
+ return err;
+}
+
+/*
+ * directories can handle most operations...
+ */
+const struct inode_operations minix_dir_inode_operations = {
+ .create = minix_create,
+ .lookup = minix_lookup,
+ .link = minix_link,
+ .unlink = minix_unlink,
+ .symlink = minix_symlink,
+ .mkdir = minix_mkdir,
+ .rmdir = minix_rmdir,
+ .mknod = minix_mknod,
+ .rename = minix_rename,
+ .getattr = minix_getattr,
+};