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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-06-10 22:10:46 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-06-10 22:10:58 +0200
commit69de75de97c17ef7370b26944ee286e4b3dc6266 (patch)
tree3f35ecefdb56aaae6fc806a099dba50777f01a3d /include
parent41fd1d4b9cd42eb28bf889719b8ce1a81af444b9 (diff)
cleanup: move entire fstree serialization to libsqfs.a
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'include')
-rw-r--r--include/meta_writer.h42
-rw-r--r--include/table.h16
2 files changed, 58 insertions, 0 deletions
diff --git a/include/meta_writer.h b/include/meta_writer.h
index 7036b6a..df0c70c 100644
--- a/include/meta_writer.h
+++ b/include/meta_writer.h
@@ -4,6 +4,20 @@
#include "compress.h"
#include "squashfs.h"
+#include "id_table.h"
+#include "fstree.h"
+
+typedef struct {
+ tree_node_t *node;
+ uint32_t block;
+ uint32_t offset;
+} idx_ref_t;
+
+typedef struct {
+ size_t num_nodes;
+ size_t max_nodes;
+ idx_ref_t idx_nodes[];
+} dir_index_t;
typedef struct meta_writer_t meta_writer_t;
@@ -27,4 +41,32 @@ void meta_writer_get_position(const meta_writer_t *m, uint64_t *block_start,
/* Reset all internal state, including the current block start position. */
void meta_writer_reset(meta_writer_t *m);
+/*
+ High level helper function that writes squashfs directory entries to
+ a meta data writer.
+
+ The dir_info_t structure is used to generate the listing and updated
+ accordingly (such as writing back the header position and total size).
+ A directory index is created on the fly and returned in *index.
+ A single free() call is sufficient.
+
+ Returns 0 on success. Prints error messages to stderr on failure.
+ */
+int meta_writer_write_dir(meta_writer_t *dm, dir_info_t *dir,
+ dir_index_t **index);
+
+/*
+ High level helper function to serialize a tree_node_t to a squashfs inode
+ and write it to a meta data writer.
+
+ The inode is written to `im`. If it is a directory node, the directory
+ contents are written to `dm` using meta_writer_write_dir. The given
+ id_table_t is used to store the uid and gid on the fly and write the
+ coresponding indices to the inode structure.
+
+ Returns 0 on success. Prints error messages to stderr on failure.
+ */
+int meta_writer_write_inode(fstree_t *fs, id_table_t *idtbl, meta_writer_t *im,
+ meta_writer_t *dm, tree_node_t *node);
+
#endif /* META_WRITER_H */
diff --git a/include/table.h b/include/table.h
index 6d61c85..57d8654 100644
--- a/include/table.h
+++ b/include/table.h
@@ -4,6 +4,7 @@
#include "squashfs.h"
#include "compress.h"
+#include "fstree.h"
#include <stdint.h>
#include <stddef.h>
@@ -23,4 +24,19 @@ int sqfs_write_table(int outfd, sqfs_super_t *super, const void *data,
size_t entsize, size_t count, uint64_t *startblock,
compressor_t *cmp);
+/*
+ High level helper function to serialize an entire file system tree to
+ a squashfs inode table and directory table.
+
+ The data is written to the given file descriptor and the super block is
+ update accordingly (inode and directory table start and total size).
+
+ The function internally creates two meta data writers and uses
+ meta_writer_write_inode to serialize the inode table of the fstree.
+
+ Returns 0 on success. Prints error messages to stderr on failure.
+ */
+int sqfs_serialize_fstree(int outfd, sqfs_super_t *super, fstree_t *fs,
+ compressor_t *cmp, id_table_t *idtbl);
+
#endif /* TABLE_H */