Re: Using kernel filesystems as userland libraries
On Mon, Nov 24, 2014 at 2:12 PM, Nicolas George wrote: > Hi. > > With the libraries present in e2fsprogs, it is possible to open a plain file > (or any other reasonable storage) as an EXT2 filesystem and manipulate files > inside it. > > Is it possible to use the implementations in the kernel to do the same thing > with any supported normal filesystem? > > Obviously, it is theoretically possible, but my question is whether it has > been done in practice. I suppose it would require writing userland > replacement for the kernel APIs (memory management, access to block devices, > scheduling) and either rebuilding the kernel source as userland code or > loading the modules directly. Regarding the interfaces, we have FUSE. But there is no tool which can automagically convert kernel filesystem code into FUSE userland code. It has to be done by hand. For some filesystems we have already FUSE implementations. -- Thanks, //richard -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: Using kernel filesystems as userland libraries
On Mon, Nov 24, 2014 at 2:12 PM, Nicolas George geo...@nsup.org wrote: Hi. With the libraries present in e2fsprogs, it is possible to open a plain file (or any other reasonable storage) as an EXT2 filesystem and manipulate files inside it. Is it possible to use the implementations in the kernel to do the same thing with any supported normal filesystem? Obviously, it is theoretically possible, but my question is whether it has been done in practice. I suppose it would require writing userland replacement for the kernel APIs (memory management, access to block devices, scheduling) and either rebuilding the kernel source as userland code or loading the modules directly. Regarding the interfaces, we have FUSE. But there is no tool which can automagically convert kernel filesystem code into FUSE userland code. It has to be done by hand. For some filesystems we have already FUSE implementations. -- Thanks, //richard -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: Using kernel filesystems as userland libraries
Hi, George: is there any reason to do this? we still need to copy files from userspace to kernel. Thanks, Xun 2014-11-24 21:12 GMT+08:00 Nicolas George : > Hi. > > With the libraries present in e2fsprogs, it is possible to open a plain file > (or any other reasonable storage) as an EXT2 filesystem and manipulate files > inside it. > > Is it possible to use the implementations in the kernel to do the same thing > with any supported normal filesystem? > > Obviously, it is theoretically possible, but my question is whether it has > been done in practice. I suppose it would require writing userland > replacement for the kernel APIs (memory management, access to block devices, > scheduling) and either rebuilding the kernel source as userland code or > loading the modules directly. > > Regards, > > -- > Nicolas George -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: Using kernel filesystems as userland libraries
Nicolas George wrote: > With the libraries present in e2fsprogs, it is possible to open a plain file > (or any other reasonable storage) as an EXT2 filesystem and manipulate files > inside it. > > Is it possible to use the implementations in the kernel to do the same thing > with any supported normal filesystem? mount -o loop /plain/file /where/to/mount -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Using kernel filesystems as userland libraries
Hi. With the libraries present in e2fsprogs, it is possible to open a plain file (or any other reasonable storage) as an EXT2 filesystem and manipulate files inside it. Is it possible to use the implementations in the kernel to do the same thing with any supported normal filesystem? Obviously, it is theoretically possible, but my question is whether it has been done in practice. I suppose it would require writing userland replacement for the kernel APIs (memory management, access to block devices, scheduling) and either rebuilding the kernel source as userland code or loading the modules directly. Regards, -- Nicolas George signature.asc Description: Digital signature
Using kernel filesystems as userland libraries
Hi. With the libraries present in e2fsprogs, it is possible to open a plain file (or any other reasonable storage) as an EXT2 filesystem and manipulate files inside it. Is it possible to use the implementations in the kernel to do the same thing with any supported normal filesystem? Obviously, it is theoretically possible, but my question is whether it has been done in practice. I suppose it would require writing userland replacement for the kernel APIs (memory management, access to block devices, scheduling) and either rebuilding the kernel source as userland code or loading the modules directly. Regards, -- Nicolas George signature.asc Description: Digital signature
Re: Using kernel filesystems as userland libraries
Nicolas George wrote: With the libraries present in e2fsprogs, it is possible to open a plain file (or any other reasonable storage) as an EXT2 filesystem and manipulate files inside it. Is it possible to use the implementations in the kernel to do the same thing with any supported normal filesystem? mount -o loop /plain/file /where/to/mount -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: Using kernel filesystems as userland libraries
Hi, George: is there any reason to do this? we still need to copy files from userspace to kernel. Thanks, Xun 2014-11-24 21:12 GMT+08:00 Nicolas George geo...@nsup.org: Hi. With the libraries present in e2fsprogs, it is possible to open a plain file (or any other reasonable storage) as an EXT2 filesystem and manipulate files inside it. Is it possible to use the implementations in the kernel to do the same thing with any supported normal filesystem? Obviously, it is theoretically possible, but my question is whether it has been done in practice. I suppose it would require writing userland replacement for the kernel APIs (memory management, access to block devices, scheduling) and either rebuilding the kernel source as userland code or loading the modules directly. Regards, -- Nicolas George -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
