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path: root/lib/fstree/mknode.c
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2022-07-08Cleanup: Get rid of libfstree "internal.h" headerDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-07-08Fix: libfstree: actually use a full 32 bit hard link counterDavid Oberhollenzer
The squashfs on-disk format uses 32 bit link counters, but the fstree used 16 bit ones. Because the link count also includes child nodes, this artificially limited the number of entries in a directory to ~64k files. This patch removes the limit by switching libfstree to 32 bit counters. Reported-by: Marvin Renich <mrvn@renich.org> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-07-08Fix: libfstree: double free in error pathDavid Oberhollenzer
If fstree_mknode fails, because the parent link count would overflow, the function fails and cleans up behind it. The problem arises because the function does this check *after* inserting the node in the parent node, so it is later free'd again, when destroying the rest of the tree. This patch moves the insertion after the check to mitigate the problem. Reported-by: Marvin Renich <mrvn@renich.org> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-03-30Fix: Directory insertion order on WindowsDavid Oberhollenzer
The fstree sorting code got removed recently, in favour of inserting at the correct position. The Windows directory scanning code still used it's own list insertion code instead of mknode (so it could allocate and translate the directory entry name in-place), which broke the sorting order. This issue is fixed in this commit. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2022-03-30Cleanup: remove node sorting from libfstreeDavid Oberhollenzer
Always insert the tree nodes in the correct oder and remove the post-process sorting step. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2021-06-25libfstree: guard against link count and inode number overflowDavid Oberhollenzer
If the hard link counter or the inode number counter overflow the maximum representable value (for SquashFS 16 bit and 32 bit respecitively), abort with an error message. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-12-18Add an explicit link count to the fstree nodesDavid Oberhollenzer
Gets initialized to 2 for directories, 1 for all other types. The count of the parent node is automatically incremented. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-12-18Rename fstree "slink_target" to "target"David Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-09-28Replace fstree/sqfshelper xattr code with sqfs_xattr_writer_tDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-09-27Cleanup: remove most of the payload pointer magic from libfstreeDavid Oberhollenzer
Now that dir_info_t and file_info_t have reasonably small, use them in tree_node_t directly instead of doing pointer arithmetic magic on the payload area. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-09-25Remove no-longer-used cruft from libfstreeDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-09-14Move data deduplication from fstree code to data writerDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-08-23Size accounting + alloc() overflow checking, round #2David Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-08-23Some simple search/replace cases for allocationDavid Oberhollenzer
This commit exchanges some malloc(x + y * z) patterns that can be found with a simple git grep and are obvious for the new wrappers. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-30Add propper copyright headers to all source filesDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-28Fix missing initialization of file fragment fieldsDavid Oberhollenzer
Despite having a flag for that now, they still need to be initialized because they are written straight to disk. Fixes: d4d1854aaed867d28ebfc97afb3518254ab6fd4b Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-28Add general purpose flags field to file_info_tDavid Oberhollenzer
Simplifies some task if we can just add a flag that a file has a framgent or that it has already been detected as a duplicate. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-28Add fragment and block checksum fields to file_info_tDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-25Make sure symlink in fstree_mknode is always set when creating a symlinkDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-24Enable largefile supportMatt Turner
Requires that config.h be included before other headers, since the macro _FILE_OFFSET_BITS changes the definitions of things like 'struct stat'. I chose to simply include it at the top of every C file and at immediately after the double-inclusion guards of every header. Signed-off-by: Matt Turner <mattst88@gmail.com> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-22Add a way to optionally keep the original time stampsDavid Oberhollenzer
First of all, this commit adds a mod_time field to a tree node. When creating the tree node, the field is set from the struct stat. When scanning a directory, the time stamps from the input are used if set. Second, the libsqfs code that reads inodes is modified to store the mod_time from the inode in the fstree node and to write the tree node into a generated inode. Finally, tar2sqfs is modified to optionally keep the timestamps from the tar archive instead of setting defaults. gensquashfs is similarly modified to keep the input timestamps if specified. The result is as follows: - sqfs2tar will always carry the timestamps from the squashfs over to the tar ball. - tar2sqfs will set defaults, unless explicitly asked to preserve the mtime from the tar ball. - gensquashfs can optionally preserve the mtime from the input hierarchy it processes if only --pack-dir is specified. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-07-12fstree: mknode: initialize fragment data, add extra blocksize slotDavid Oberhollenzer
This commit makes sure that regular file tree nodes have one more slot than necessary to support files that don't have fragments. Also, it initializes the fragment data, which should help to deduplicate some code ahead. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-22fix: always set permissions on symlinks to 0777David Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-19Cleanup: split up fstree.cDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>