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A Support of GVFS Caching
Holý, Ondřej ; Zelený, Jan (referee) ; Smrčka, Aleš (advisor)
The master's thesis deals with a support of caching in GVfs (Gnome Virtual filesystem). Basics of caches, cache invalidation, and cache replacement algorithms are described. Description of GIO filesystem abstraction and communication of modules within GVfs is provided next. The disadvantages of individual GVfs modules and, if present, their internal caches are discussed. The thesis proposes three types of cache. The first type of cache is for storing file metadata, the second one for directory listings, and the latter for file content. These caches have been implemented in a prototype and verified with respect to the functionality and performance. The main benefits of the proposed solution are faster work with virtual filesystems and provided missing functionality of lower-level virtual filesystem to GIO abstraction (namely, for instance seek operation).
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A File System Implementing Storage for Gentoo Portage Based on a Relational Database
Štulpa, Adam ; Mlích, Jozef (referee) ; Rychlý, Marek (advisor)
The thesis deals with implementation of a program which can, through the use of FUSE library, make data accessible in the relational database like the classical Gentoo Portage storage. First, the reader of the thesis becomes familiar with FUSE library itself. After that, the new data model is built based on the analysis of the Portage structure. The new model emphasizes especially dependencies of packages. The key implementation issues are also described in the next part. Finally, the thesis assesses outcomes achieved including comparison with standard Portage implementation and classical file system. The other possibilities of the project development are considered as well.
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The Hidden Resources Detector for GNU/Linux
Nečas, Radek ; Rogalewicz, Adam (referee) ; Procházka, Boris (advisor)
The main goal of this thesis was to detect hide resources in GNU/Linux operating systems and analyse tools so called rootkits, which are used to hide system resources. This thesis is devided into two parts, theoretical and practical one. Theoretic part focusses on resource managment, representation, privilege levels and system calls. Practical part covers design and implementation of an abstract detector. Each new detection method is implemented as a plugin. Some of those methods are realized as linux kernel modules. The usability of the detector is compared against real rootkits.
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Virtual Filesystem to Access Contents of Archive Files
Samek, Michal ; Očenášek, Pavel (referee) ; Rychlý, Marek (advisor)
This bachelors's thesis describes design and implementation of a console application, which could be used for creation of virtual filesystems from archive files. These virtual filesystems are managed by the means of the FUSE library. Application supports several types of archive files, for some of them even write support is implemented. Support for additional types could be easily integrated via designed interface.
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Methods of Linux Kernel Hacking
Procházka, Boris ; Malinka, Kamil (referee) ; Vojnar, Tomáš (advisor)
This bachelor thesis focuses on the Linux kernel security from the attacker perspective. It tries to identify and map all key features and methods used by nowadays cyber-terrorists. One of its aims is to give a comprehensive overview of this topic. At final, it can serve as a small reference for everybody who wants to broaden his knowledge of Linux kernel security. The work consists of four parts. The first part repeats and defines basic notions and taxonomy of operation systems. The second and third part form the core. They cover principles and methods used to hide processes, files, connections, etc. The last chaper is devoted to related issues. A supplement of this bachelor thesis is a set of demonstrating modules, which implement discussed problems involved, and tables, where can be found a comparison of nowadays rootkits.
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A File System Implementing Storage for Gentoo Portage Based on a Relational Database
Štulpa, Adam ; Weiss, Petr (referee) ; Rychlý, Marek (advisor)
The thesis deals with an implementation of a program, which can make the data in relational database available as the standard storage Gentoo Portage with the assistance of FUSE library. The reader is initially familiarised with its structure. There is an analysis of the requirements on the program and the database described in the work. Furthermore, their proposal is given and in the penultimate chapter, there is described the implementation of the program. In the conclusion, there are all the outcomes evaluated including the comparison with the standard file system and further development possibilities of the project are also described.
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Aplikace pro konsolidaci cloudových úložišť
MIKA, Tomáš
The topic of this thesis is to create an application for consolidation of cloud storage. The work describes the tools and technologies necessary to create such a system, while also providing a direct comparison with existing and available solutions. The thesis provides with data storage problematic in cloud storage of various providers and their security against loss, damage, manipulation, or machine analysis.
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Methods of Linux Kernel Hacking
Procházka, Boris ; Malinka, Kamil (referee) ; Vojnar, Tomáš (advisor)
This bachelor thesis focuses on the Linux kernel security from the attacker perspective. It tries to identify and map all key features and methods used by nowadays cyber-terrorists. One of its aims is to give a comprehensive overview of this topic. At final, it can serve as a small reference for everybody who wants to broaden his knowledge of Linux kernel security. The work consists of four parts. The first part repeats and defines basic notions and taxonomy of operation systems. The second and third part form the core. They cover principles and methods used to hide processes, files, connections, etc. The last chaper is devoted to related issues. A supplement of this bachelor thesis is a set of demonstrating modules, which implement discussed problems involved, and tables, where can be found a comparison of nowadays rootkits.
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A File System Implementing Storage for Gentoo Portage Based on a Relational Database
Štulpa, Adam ; Weiss, Petr (referee) ; Rychlý, Marek (advisor)
The thesis deals with an implementation of a program, which can make the data in relational database available as the standard storage Gentoo Portage with the assistance of FUSE library. The reader is initially familiarised with its structure. There is an analysis of the requirements on the program and the database described in the work. Furthermore, their proposal is given and in the penultimate chapter, there is described the implementation of the program. In the conclusion, there are all the outcomes evaluated including the comparison with the standard file system and further development possibilities of the project are also described.
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Virtual Filesystem to Access Contents of Archive Files
Samek, Michal ; Očenášek, Pavel (referee) ; Rychlý, Marek (advisor)
This bachelors's thesis describes design and implementation of a console application, which could be used for creation of virtual filesystems from archive files. These virtual filesystems are managed by the means of the FUSE library. Application supports several types of archive files, for some of them even write support is implemented. Support for additional types could be easily integrated via designed interface.
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