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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-10-07 13:54:24 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-10-07 13:54:24 +0200
commit1fad07ce86fc2a506c59501d7fb7c7d7481525f6 (patch)
tree6ba41c514e2ddc692cb95a0fb2070dd222897c7c /lib/common/serialize_fstree.c
parent5597dca9c6053cd19104e18d88edb199b32e3743 (diff)
Rename libsqfshelper to libcommon
That is IMO less confusing and express what it is (i.e. what it has become) more clearly, i.e. common code shared by the utilities. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'lib/common/serialize_fstree.c')
-rw-r--r--lib/common/serialize_fstree.c220
1 files changed, 220 insertions, 0 deletions
diff --git a/lib/common/serialize_fstree.c b/lib/common/serialize_fstree.c
new file mode 100644
index 0000000..14f0a42
--- /dev/null
+++ b/lib/common/serialize_fstree.c
@@ -0,0 +1,220 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * serialize_fstree.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "common.h"
+
+#include <assert.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+static sqfs_inode_generic_t *tree_node_to_inode(tree_node_t *node)
+{
+ sqfs_inode_generic_t *inode;
+ size_t extra = 0;
+
+ if (S_ISLNK(node->mode))
+ extra = strlen(node->data.slink_target);
+
+ inode = alloc_flex(sizeof(*inode), 1, extra);
+ if (inode == NULL) {
+ perror("creating inode");
+ return NULL;
+ }
+
+ switch (node->mode & S_IFMT) {
+ case S_IFSOCK:
+ inode->base.type = SQFS_INODE_SOCKET;
+ inode->data.ipc.nlink = 1;
+ break;
+ case S_IFIFO:
+ inode->base.type = SQFS_INODE_FIFO;
+ inode->data.ipc.nlink = 1;
+ break;
+ case S_IFLNK:
+ inode->base.type = SQFS_INODE_SLINK;
+ inode->data.slink.nlink = 1;
+ inode->data.slink.target_size = extra;
+ inode->slink_target = (char *)inode->extra;
+ memcpy(inode->extra, node->data.slink_target, extra);
+ break;
+ case S_IFBLK:
+ inode->base.type = SQFS_INODE_BDEV;
+ inode->data.dev.nlink = 1;
+ inode->data.dev.devno = node->data.devno;
+ break;
+ case S_IFCHR:
+ inode->base.type = SQFS_INODE_CDEV;
+ inode->data.dev.nlink = 1;
+ inode->data.dev.devno = node->data.devno;
+ break;
+ default:
+ assert(0);
+ }
+
+ return inode;
+}
+
+static sqfs_inode_generic_t *write_dir_entries(const char *filename,
+ sqfs_dir_writer_t *dirw,
+ tree_node_t *node)
+{
+ sqfs_u32 xattr, parent_inode;
+ sqfs_inode_generic_t *inode;
+ tree_node_t *it;
+ int ret;
+
+ ret = sqfs_dir_writer_begin(dirw, 0);
+ if (ret)
+ goto fail;
+
+ for (it = node->data.dir.children; it != NULL; it = it->next) {
+ ret = sqfs_dir_writer_add_entry(dirw, it->name, it->inode_num,
+ it->inode_ref, it->mode);
+ if (ret)
+ goto fail;
+ }
+
+ ret = sqfs_dir_writer_end(dirw);
+ if (ret)
+ goto fail;
+
+ xattr = node->xattr_idx;
+ parent_inode = (node->parent == NULL) ? 0 : node->parent->inode_num;
+
+ inode = sqfs_dir_writer_create_inode(dirw, 0, xattr, parent_inode);
+ if (inode == NULL) {
+ ret = SQFS_ERROR_ALLOC;
+ goto fail;
+ }
+
+ return inode;
+fail:
+ sqfs_perror(filename, "recoding directory entries", ret);
+ return NULL;
+}
+
+int sqfs_serialize_fstree(const char *filename, sqfs_file_t *file,
+ sqfs_super_t *super, fstree_t *fs,
+ sqfs_compressor_t *cmp, sqfs_id_table_t *idtbl)
+{
+ sqfs_inode_generic_t *inode;
+ sqfs_meta_writer_t *im, *dm;
+ sqfs_dir_writer_t *dirwr;
+ sqfs_u32 offset;
+ sqfs_u64 block;
+ tree_node_t *n;
+ int ret = -1;
+ size_t i;
+
+ im = sqfs_meta_writer_create(file, cmp, 0);
+ if (im == NULL) {
+ ret = SQFS_ERROR_ALLOC;
+ goto out_err;
+ }
+
+ dm = sqfs_meta_writer_create(file, cmp,
+ SQFS_META_WRITER_KEEP_IN_MEMORY);
+ if (dm == NULL) {
+ ret = SQFS_ERROR_ALLOC;
+ goto out_im;
+ }
+
+ dirwr = sqfs_dir_writer_create(dm);
+ if (dirwr == NULL) {
+ ret = SQFS_ERROR_ALLOC;
+ goto out_dm;
+ }
+
+ super->inode_table_start = file->get_size(file);
+
+ for (i = 0; i < fs->inode_tbl_size; ++i) {
+ n = fs->inode_table[i];
+
+ if (S_ISDIR(n->mode)) {
+ inode = write_dir_entries(filename, dirwr, n);
+
+ if (inode == NULL) {
+ ret = 1;
+ goto out;
+ }
+ } else if (S_ISREG(n->mode)) {
+ inode = n->data.file.user_ptr;
+ n->data.file.user_ptr = NULL;
+
+ if (inode == NULL) {
+ ret = SQFS_ERROR_INTERNAL;
+ goto out;
+ }
+ } else {
+ inode = tree_node_to_inode(n);
+
+ if (inode == NULL) {
+ ret = SQFS_ERROR_ALLOC;
+ goto out;
+ }
+ }
+
+ inode->base.mode = n->mode;
+ inode->base.mod_time = n->mod_time;
+ inode->base.inode_number = n->inode_num;
+
+ sqfs_inode_set_xattr_index(inode, n->xattr_idx);
+
+ ret = sqfs_id_table_id_to_index(idtbl, n->uid,
+ &inode->base.uid_idx);
+ if (ret) {
+ free(inode);
+ goto out;
+ }
+
+ ret = sqfs_id_table_id_to_index(idtbl, n->gid,
+ &inode->base.gid_idx);
+ if (ret) {
+ free(inode);
+ goto out;
+ }
+
+ sqfs_meta_writer_get_position(im, &block, &offset);
+ fs->inode_table[i]->inode_ref = (block << 16) | offset;
+
+ ret = sqfs_meta_writer_write_inode(im, inode);
+ free(inode);
+
+ if (ret)
+ goto out;
+ }
+
+ ret = sqfs_meta_writer_flush(im);
+ if (ret)
+ goto out;
+
+ ret = sqfs_meta_writer_flush(dm);
+ if (ret)
+ goto out;
+
+ super->root_inode_ref = fs->root->inode_ref;
+ super->directory_table_start = file->get_size(file);
+
+ ret = sqfs_meta_write_write_to_file(dm);
+ if (ret)
+ goto out;
+
+ ret = 0;
+out:
+ sqfs_dir_writer_destroy(dirwr);
+out_dm:
+ sqfs_meta_writer_destroy(dm);
+out_im:
+ sqfs_meta_writer_destroy(im);
+out_err:
+ if (ret < 0) {
+ sqfs_perror(filename, "storing filesystem tree",
+ ret);
+ }
+ return ret;
+}