nbs | Network Backed Block Device Driver for Linux

by mbrumlow C Version: Current License: MIT

X-Ray Key Features Code Snippets(2)Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | nbs Summary

nbs is a C library. nbs has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

This project consist of a Linux kernel driver and a back end service. Both are written in C. The Linux driver exports a block device that can be used as a normal block device without requiring a user space process to handle the network operations of sending block data two and from back end service. The service is reasonable to responding to block request and storing the block data on the system that the service is running on.

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Quality

Security

License

Reuse

Support

nbs has a low active ecosystem.

It has 5 star(s) with 0 fork(s). There are no watchers for this library.

It had no major release in the last 6 months.

nbs has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of nbs is current.

Quality

nbs has 0 bugs and 0 code smells.

Security

nbs has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

nbs code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

nbs is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

nbs releases are not available. You will need to build from source code and install.

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nbs Key Features

No Key Features are available at this moment for nbs.

nbs Examples and Code Snippets

Start the NBS admin server .

python

Lines of Code : 5

License : No License

Copy

def start_master(master_port):
    sys.stderr.write('nbsadmin master RPC is listening to 0.0.0.0:%d\n' % master_port)
    task_runner = MasterRunner(Server('0.0.0.0', master_port))
    _stop_gracefully(task_runner.stop)
    task_runner.loop()

Start the NBS admin service .

python

Lines of Code : 5

License : No License

Copy

def start_slave(master_ip="127.0.0.1", master_port=9901):
    sys.stderr.write('nbsadmin slave register to %s:%d\n' % (master_ip, master_port))
    task_runner = SlaveRunner(Client(master_ip, master_port))
    _stop_gracefully(task_runner.stop)
    t

Community Discussions

Trending Discussions on nbs

Removing repeated statements from nested conditions in Ocaml

XQuery to retrieve value

Copying the NetBufferListInfo array instead of calling NdisCopySendNetBufferListInfo?

Regex to match (French) numbers

Is there an rc file (-like option) for jVi in Netbeans?

how to hide and show a div using media query's

"Preserving" edge attributes with in built function

descending order Arraylist

My Dijkstra's algorithm implementation does not return shortest path

AWK change field separator multiple times

QUESTION

Removing repeated statements from nested conditions in Ocaml

Asked 2022-Feb-18 at 19:56

As an exercise in class, we are supposed to calculate the entry price for people in a night club, provided their age and gender. The under 25 get 20% off, and Females/NBs get 50% off, stacking multiplicatively.

While my code works, it repeats the gender check twice, which is poor form and could cause problems in a more complex application. How can I spare the repetition ?

...

ANSWER

Answered 2022-Feb-18 at 15:14

You can pretty much copy the python version:

Source https://stackoverflow.com/questions/71175171

QUESTION

XQuery to retrieve value

Asked 2021-Nov-22 at 19:58

I have this XML that I am trying to retrieve a value from...

...

ANSWER

Answered 2021-Nov-22 at 19:21

Two problems:

(1): your XPath expression is wrong - you must also include the /Header part to get the

XML element selected

(2): your h1 expression is wrong - since you're trying to get the value of an attribute on the XML element, you need to use the expression in your second line.

So try this:

Source https://stackoverflow.com/questions/70070580

QUESTION

Copying the NetBufferListInfo array instead of calling NdisCopySendNetBufferListInfo?

Asked 2021-Oct-20 at 16:58

I have a kernel driver that seperates every net buffer in every recv/send NBL, and allocates a local structure for every NB which contains the packet content and some other stuff and sends it to a user buffer, and completes/returns the original NBL. The user service then sends back the packets that are OK back to driver and i then finally send/indicate them, by creating an NBL for every packet, and then chaining them together.

This causes the loss of some metadata about the packet, that are seem to be inside NetBufferListInfo (specially WFP metadata).

My question is, can i just save the content of the NetBufferListInfo in the original NBL of the corresponding NB, and save it to my local structure that represents NBs, and the recopy it when i create a NBL that contains that NB?

I thought i should use NdisAllocateCloneNetBufferList + NetBufferListInfo and copy the pointer to the cloned NBL to my local structure as a new member, but the problem with this is that freeing these buffers using NdisFreeCloneNetBufferList will become very complicated, as i create a local structure for every net buffer and insert them in a list that is sent to user service, and each of them could point to a arbitrary NBL (and many of them could be pointing to the same NBL, as i clone the NBL once for multiple NBs inside an NBL), and when the user sends those that are OK to me to, i need to be careful not to free a cloned NBL twice after i indicate/send the NBLs (i assume it will cause double free BSOD). Therefore i need to then keep a reference count for every cloned NBL and make sure to free it when it hits 0, and also some other complications..

So what is the easiest solution for me? Can i just save the content of NetBufferListInfo array of the corresponding NBL in my local structure, and recopy it when i create the final NBL corresponding to a NB?

...

ANSWER

Answered 2021-Oct-20 at 16:58

You're allowed to copy the NetBufferListInfo fields that are fully documented and that you understand semantically. For example, you can copy the TcpIpChecksumNetBufferListInfo, because it's fully documented, and semantically it makes sense to propagate it to another NBL that has the same payload.

But there are some fields that are private to the OS, and at least one of those is a refcounted pointer. So if you were to copy that field, then return the original NBL, the pointer would dangle. The only way to influence the refcount is to call NdisCopySendNetBufferListInfo or NdisCopyReceiveNetBufferListInfo, which handle this for you.

TL;DR: You can write code like this:

Source https://stackoverflow.com/questions/69632074

QUESTION

Regex to match (French) numbers

Asked 2021-Oct-09 at 15:11

I'm trying to find a simple (not perfect) pattern to recognise French numbers in a French text. French numbers use comma for the Anglo-Saxon decimal, and use dot or space for the thousand separator. \u00A0 is non-breaking space, also often used in French documents for the thousand separator.

So my first attempt is:

...

ANSWER

Answered 2021-Oct-03 at 11:18

What about:

Source https://stackoverflow.com/questions/69414693

QUESTION

Is there an rc file (-like option) for jVi in Netbeans?

Asked 2021-Aug-17 at 16:07

I'm using Netbeans 12 with jVi 1.6.5 on Ubuntu Linux 18.04. Every time I open a new source file in an editor window, I must enter the :set nu command manually to enable line numbers in jVi.

Is there a way to automate the latter? I can't find anything about an rc file for jVi, and in NBs Tools -> Options - >jVi Config menu I cannot find anything that appears related.

Extensive Googling fails to lead to enlightenment. Am I overlooking something? Can this be set, and if so, where?

...

ANSWER

Answered 2021-Aug-17 at 16:07

There's Tools > Options > jViConfig > Windows > 'number' 'nu'

Source https://stackoverflow.com/questions/68817223

QUESTION

how to hide and show a div using media query's

Asked 2021-Jun-29 at 09:09

i need to hide this div above 992px and show this div in mobile responsive and tab view

...

ANSWER

Answered 2021-Jun-29 at 06:21

max-width is for the noted px ans smaller

Source https://stackoverflow.com/questions/68173454

QUESTION

"Preserving" edge attributes with in built function

Asked 2021-Jun-21 at 09:33

This post is related to a previous question.

The basic problem in that post was how to connect nodes by common retweeted users. The code suggested by @ThomasIsCoding does work.

My follow up question is how to make this function store edge attributes. I provide a toy example below:

My initial dataframe is of the form:

...

ANSWER

Answered 2021-Jun-21 at 09:33

You can try the code below

Source https://stackoverflow.com/questions/68064953

QUESTION

descending order Arraylist

Asked 2021-May-07 at 02:03

how to sort descending on Arraylist ? i don't know how to do it

my code ArrayList> data = new ArrayList>();

...

ANSWER

Answered 2021-May-07 at 02:03

You would do something like this:

Source https://stackoverflow.com/questions/67428046

QUESTION

My Dijkstra's algorithm implementation does not return shortest path

Asked 2021-Mar-07 at 08:58

I tried to implement the Dijkstra's shortest path algorithm in JavaScript, and tested it with multiple examples.

I am using this graph to see how it would behave:

If I want to find the shortest path from A to I, the result should be [A, D, C, F, G, H, I] with distance equal to 10.

But my implementation returns the path as [A, B, E, J, F, G, H, I] with distance of 14.

Here is my JavaScript code:

...

ANSWER

Answered 2021-Mar-07 at 08:58

The problem is that you are not performing a best-first search. Your code really performs a depth-first search, where you just optimise which unvisited neighbor you will choose from the current node. But you should take the node with the minimum distance from among all unvisited nodes, not just among the neighbors of the current node.

See also step 6 of the algorithm description on Wikipedia:

Otherwise, select the unvisited node that is marked with the smallest tentative distance, set it as the new "current node"

So the problem is in selectNextNode. It could be corrected to this:

Source https://stackoverflow.com/questions/66505722

QUESTION

AWK change field separator multiple times

Asked 2021-Feb-18 at 13:04

I have the following sample code below; for ease of testing I have combined the text of a few files into one. Usually this script would use the find command to filter through each subdirectory looking for versions.tf and run AWK on each one.

...

ANSWER

Answered 2021-Feb-18 at 08:19

Changing FS does not have immediate effect, consider that if file.txt content is

Source https://stackoverflow.com/questions/66255562

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install nbs

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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