__BLK_FREE_TAGS(9) Block Devices __BLK_FREE_TAGS(9)NAME
__blk_free_tags - release a given set of tag maintenance info
SYNOPSIS
int __blk_free_tags(struct blk_queue_tag * bqt);
ARGUMENTS
bqt
the tag map to free
DESCRIPTION
Tries to free the specified bqt. Returns true if it was actually freed and false if there are still references using it
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 __BLK_FREE_TAGS(9)
Check Out this Related Man Page
M_TAG(9) BSD Kernel Developer's Manual M_TAG(9)NAME
m_tag, m_tag_get, m_tag_free, m_tag_prepend, m_tag_unlink, m_tag_delete, m_tag_delete_chain, m_tag_delete_nonpersistent, m_tag_find,
m_tag_copy, m_tag_copy_chain, m_tag_init, m_tag_first, m_tag_next -- mbuf tagging interfaces
SYNOPSIS
#include <sys/mbuf.h>
struct m_tag *
m_tag_get(int type, int len, int wait);
void
m_tag_free(struct m_tag *t);
void
m_tag_prepend(struct mbuf *m, struct m_tag *t);
void
m_tag_unlink(struct mbuf *m, struct m_tag *t);
void
m_tag_delete(struct mbuf *m, struct m_tag *t);
void
m_tag_delete_chain(struct mbuf *m, struct m_tag *t);
void
m_tag_delete_nonpersistent(struct mbuf *);
struct m_tag *
m_tag_find(struct mbuf *m, int type, struct m_tag *t);
struct m_tag *
m_tag_copy(struct m_tag *m);
int
m_tag_copy_chain(struct mbuf *to, struct mbuf *from);
void
m_tag_init(struct mbuf *m);
struct m_tag *
m_tag_first(struct mbuf *m);
struct m_tag *
m_tag_next(struct mbuf *m, struct m_tag *t);
DESCRIPTION
The m_tag interface is used to ``tag'' mbufs.
FUNCTIONS
m_tag_get(type, len, wait)
Allocate an mbuf tag. type is one of the PACKET_TAG_ macros. len is the size of the data associated with the tag, in bytes. wait
is either M_WAITOK or M_NOWAIT.
m_tag_free(t)
Free the mbuf tag t.
m_tag_prepend(m, t)
Prepend the mbuf tag t to the mbuf m. t will become the first tag of the mbuf m. When m is freed, t will also be freed.
m_tag_unlink(m, t)
Unlink the mbuf tag t from the mbuf m.
m_tag_delete(m, t)
The same as m_tag_unlink() followed by m_tag_free().
m_tag_delete_chain(m, t)
Unlink and free mbuf tags beginning with the mbuf tag t from the mbuf m. If t is NULL, m_tag_delete_chain() unlinks and frees all
mbuf tags associated with the mbuf m.
m_tag_delete_nonpersistent(m)
Unlink and free all non persistent tags associated with the mbuf m.
m_tag_find(m, type, t)
Find an mbuf tag with type type after the mbuf tag t in the tag chain associated with the mbuf m. If t is NULL, search from the
first mbuf tag. If an mbuf tag is found, return a pointer to it. Otherwise return NULL.
m_tag_copy(t)
Copy an mbuf tag t. Return a new mbuf tag on success. Otherwise return NULL.
m_tag_copy_chain(to, from)
Copy all mbuf tags associated with the mbuf from to the mbuf to. If to already has any mbuf tags, they will be unlinked and freed
beforehand. Return 1 on success. Otherwise return 0.
m_tag_init(m)
Initialize mbuf tag chain of the mbuf m.
m_tag_first(m)
Return the first mbuf tag associated with the mbuf m. Return NULL if no mbuf tags are found.
m_tag_next(m, t)
Return the next mbuf tag after t associated with the mbuf m. Return NULL if t is the last tag in the chain.
CODE REFERENCES
The mbuf tagging interfaces are implemented within the file sys/kern/uipc_mbuf2.c.
The PACKET_TAG_ macros are defined in the file sys/sys/mbuf.h.
SEE ALSO intro(9), malloc(9), mbuf(9)BUGS
The semantics of the term "persistent tag" are vague.
BSD September 7, 2004 BSD
Hi everyone,
I know the following questions are noobish questions but I am asking them because I am confused about the basics of history behind UNIX and LINUX.
Ok onto business, my questions are-:
Was/Is UNIX ever an open source operating system ?
If UNIX was... (21 Replies)
Hello and thanks in advance for any help anyone can offer me
I'm trying to learn the find command and thought I was understanding it... Apparently I was wrong. I was doing compound searches and I started getting weird results with the -size test. I was trying to do a search on a 1G file owned by... (14 Replies)
hi all,
i have installed quota on my centos 7 machine and its what im after (setting size limit on users, so they cant fill the hard drive)
i want to now make this part of my create user script for my sftp server so i want to do a echo and a read command so i capture the limit they enter... (0 Replies)
Hi everybody,
Which Unix base OS have best performance for HOST virtualization?
I tested SmartOS but it needs another OS to connect remotely!
Thanks in advance. (11 Replies)
Hi All,
I need to write a shell script which opens a file and increments the version(text) within the file every time the script runs. For example:
$ cat docker_file.yml
version: '3.1'
services:
ui:
image: repo-srv.dev.io:5000/facebook/ui:0.0.2-QA1
$
So, I would like... (6 Replies)
Dear Team
We use DB2 v10.5 and using DBArtisan tool
Can someone please guide how to convert digits to binary numbers using db2 feature.
Ex> for number 9 , binary should be 1001 ( 8+1)
Any help appreciated. Thanks (2 Replies)
hi folks,
how to using tar with exclude directory and compress it using tar.Z
i only know how to exclude dir only with this command below:
tar -cvf /varios/restore/test.tar -X excludefile.txt /jfma/test1/
how to compress it using 1 command?
Thanx
Please use CODE tags as... (6 Replies)
Quite an obscure question I think.
We have a rebuild process for remote sites that allows us to PXE rebuild a till (actually a PC with a touch screen and various fancy bits) running CentOS. The current CentOS5 tills work just fine with a tar image restore and some personalisation. Sadly,... (4 Replies)
Hello All,
I had recently learnt a bit of Docker(which provides containerization process).
Here are some of my learning points from it.
Let us start first with very basic question:
What is Docker:
Docker is a platform for sysadmins and developers to DEPLOY, DEVELOP and RUN applications ... (7 Replies)
What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file.
# When the shell exits, append to the history file instead of overwriting it
shopt -s histappend (3 Replies)
Hello... And thanks in advance for any help anyone can offer me
I was trying to work out the differences between displaying modify, access, and change times with the 'ls' command. Everything seems in order when I look at files, but the access time on a directory doesn't seem to change when I... (4 Replies)
Hello everyone,
I am having an issue here with CentOS release 6.6 (Final) that shows all of the space used up, but I can't tell where the space went.
Seemingly I am using up 100%, according to
df -h
Filesystem Size Used Avail Use% Mounted on... (27 Replies)
I'm trying to use a bash script for a psych experiment that involves listening to sound files and responding. If I have something like the code below, how can I make sure that a key press is assigned to RESPONSE only after the second echo statement?
for i in 1 2 3; do
echo "Ready?"
sleep 2
... (10 Replies)
After the success of the jq - tool for parsing and manipulating JSON-Data someone wrote a tool called yq, which aims to be the same for YAML, what jq is for JSON. Seems to work fine. I'll definitely give it a chance in future.
Example YAML-File:
--- !ruby/object:Puppet::Node::Facts
... (1 Reply)
Dear All,
I am very pleased to announce that Dave Munro (gull04) is joining the Moderation Team, after being a very valuable member of UNIX.com for 15+ years.
Dave is an IT Consultant with 30 years of experience this year, has worked in many of the industry vertical market segments and has... (6 Replies)