Slides from a talk given at PythonPune meetup on 21st Feb, 2015, and later at PyConIndia on 04th Oct, 2015.
FUSE-Python is probably the quickest way to prototype new filesystem ideas and rapidly build a new filesystem from scratch. In these slides I cover the basic FUSE methods and data structures necessary for implementing a working filesystem.
FUSE and beyond: bridging filesystems slides by Emmanuel Dreyfuseurobsdcon
Abstract
Everything started with the desire to have a distributed filesystem better than NFS, which would be elastic and replicated with no SPOF. glusterFS was among the filesystems that could do that, but it uses The FUSE interface to the kernel, which was not available on NetBSD.
We will therefore discuss FUSE implementation and its NetBSD counterpart which is called PUFFS. A first but isufficient bridging attmpt called reFUSE was done, but porting real filesystems required the more complete PERFUSE bridge, which we will present here.
In a third part, we will look at the various unexpected roadblocks that had to be handled during PERFUSE implementation, in order to get a fully functionnal glusterFS on NetBSD.
Speaker bio
Emmanuel Dreyfus works as an IT manager at ESPCI ParisTech in France. He has been contributing for 13 years to NetBSD, in areas such as binary compatibility, and FUSE implementation. More at http://hcpnet.free.fr/pubz/
FUSE and beyond: bridging filesystems slides by Emmanuel Dreyfuseurobsdcon
Abstract
Everything started with the desire to have a distributed filesystem better than NFS, which would be elastic and replicated with no SPOF. glusterFS was among the filesystems that could do that, but it uses The FUSE interface to the kernel, which was not available on NetBSD.
We will therefore discuss FUSE implementation and its NetBSD counterpart which is called PUFFS. A first but isufficient bridging attmpt called reFUSE was done, but porting real filesystems required the more complete PERFUSE bridge, which we will present here.
In a third part, we will look at the various unexpected roadblocks that had to be handled during PERFUSE implementation, in order to get a fully functionnal glusterFS on NetBSD.
Speaker bio
Emmanuel Dreyfus works as an IT manager at ESPCI ParisTech in France. He has been contributing for 13 years to NetBSD, in areas such as binary compatibility, and FUSE implementation. More at http://hcpnet.free.fr/pubz/
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Writing a filesystem can be very cool. Alas, writing a filesystem is also very hard. This is mainly because coding in the kernel is hard. Thankfully, most of the pain can be avoided by using a library like FUSE. Such libraries enable filesystems to be expressed as simple userspace programmes by taking care of all that tedious mucking about in kernel space.
This talk will look at the Why and How of such filesystem development, using FUSE on UNIX. The talk will be very practical, with code on the screen and maybe even written in front of your very eyes (if I'm feeling brave).
There will be a short recap of how the VFS works on UNIX and then we'll dive into writing a filesystem with FUSE.
I'll go over my experiences of developing such filesystems - architectural patterns, testing, performance, etc. There will also be a section on the behaviours and gotchas of the libraries involved.
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As you know, one of Grub2 functions makes LiveCD iso image booting directly. You are able to make multi-boot UBS drive by this function and try to use several LiveCD Linux Distributions. Last openSUSE.Asia Summit 2015, I introduced how to make multi-boot USB drive by Grub2 function of booting LiveCD iso booting directly and successful booting cases of describing style on grub.cfg. But I could not introduce the successful booting case of openSUSE bootable iso image. Now, I found a success case of openSUSE bootable iso image. I introduce an inspection result of this case and successful factors. Additionally, hardware control of PC is currently changing from BIOS to EFI/UEFI, which is interface specification of operating system and firmware. You need a different approach from the conventional BIOS for booting on EFI/UEFI. I introduce how to create a EFI/UEFI multi-boot USB drive for LiveCD bootable iso images including openSUSE. If you have this milti-boot USB drive, it is easy for you to explain superiority of openSUSE while comparing with some Linux distributions. And you are able to carry different purpose LiveCD openSUSEs by SUSE Studio without PC.
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An Introduction to User Space Filesystem DevelopmentMatt Turner
Writing a filesystem can be very cool. Alas, writing a filesystem is also very hard. This is mainly because coding in the kernel is hard. Thankfully, most of the pain can be avoided by using a library like FUSE. Such libraries enable filesystems to be expressed as simple userspace programmes by taking care of all that tedious mucking about in kernel space.
This talk will look at the Why and How of such filesystem development, using FUSE on UNIX. The talk will be very practical, with code on the screen and maybe even written in front of your very eyes (if I'm feeling brave).
There will be a short recap of how the VFS works on UNIX and then we'll dive into writing a filesystem with FUSE.
I'll go over my experiences of developing such filesystems - architectural patterns, testing, performance, etc. There will also be a section on the behaviours and gotchas of the libraries involved.
How to make multi-boot USB drive for LiveCD iso images on EFI/UEFI and BIOSKentaro Hatori
As you know, one of Grub2 functions makes LiveCD iso image booting directly. You are able to make multi-boot UBS drive by this function and try to use several LiveCD Linux Distributions. Last openSUSE.Asia Summit 2015, I introduced how to make multi-boot USB drive by Grub2 function of booting LiveCD iso booting directly and successful booting cases of describing style on grub.cfg. But I could not introduce the successful booting case of openSUSE bootable iso image. Now, I found a success case of openSUSE bootable iso image. I introduce an inspection result of this case and successful factors. Additionally, hardware control of PC is currently changing from BIOS to EFI/UEFI, which is interface specification of operating system and firmware. You need a different approach from the conventional BIOS for booting on EFI/UEFI. I introduce how to create a EFI/UEFI multi-boot USB drive for LiveCD bootable iso images including openSUSE. If you have this milti-boot USB drive, it is easy for you to explain superiority of openSUSE while comparing with some Linux distributions. And you are able to carry different purpose LiveCD openSUSEs by SUSE Studio without PC.
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The Superuser: Root
Disks and Partitions
Making New Partitions
Mounting Filesystems
Mounting a Filesystem: mount
Mounting Other Filesystems
Unmounting a Filesystem: umount
Sample /etc/fstab
Filesystem Types
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The alleged breach affected Europol agencies CCSE, EC3, Europol Platform for Experts, Law Enforcement Forum, and SIRIUS. Infiltration of these entities can disrupt ongoing investigations and compromise sensitive intelligence shared among international law enforcement agencies.
However, this is neither the first nor the last activity of IntekBroker. We have compiled for you what happened in the last few days. To track such hacker activities on dark web sources like hacker forums, private Telegram channels, and other hidden platforms where cyber threats often originate, you can check SOCRadar’s Dark Web News.
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9. Why FUSE?
Usable by unprivileged users
Easier development cycle
Easy to install (apt-get install sshfs)
Multiple language support and bindings
C, C++, Python, Java, Ruby, Perl, Golang, Lua
Ported to FreeBSD, Mac OSX, OpenSolaris
17. The stat structure
Member Description
st_mode Inode protection mode
st_ino File serial number
st_dev Device ID
st_nlink Number of hard links
st_uid User ID of file
st_gid Group ID of file
st_size File size in bytes
st_atime Time of last access
st_mtime Time of last data modification
st_ctime Time of last status change
ref: <sys/stat.h>