EmbLogic » Device Drivers

How to Replace a Switch-Statement with function pointer

Shubham Gupta — Thu, 29 Dec 2016 06:36:34 +0000

float Plus (float a, float b) { return a+b; }
float Minus (float a, float b) { return a-b; }
float Multiply(float a, float b) { return a*b; }
float Divide (float a, float b) { return a/b; }

// Solution with a switch-statement – specifies which operation to execute
void Switch(float a, float b, char opCode)
{
float result;

// execute operation
switch(opCode)
{
case ‘+’ : result = Plus (a, b); break;
case ‘-’ : result = Minus (a, b); break;
case ‘*’ : result = Multiply (a, b); break;
case ‘/’ : result = Divide (a, b); break;
}

cout << "Switch: 2+5=" << result << endl; // display result
}

// Solution with a function pointer – is a function pointer and points to
// a function which takes two floats and returns a float. The function pointer
// “specifies” which operation shall be executed.
void Switch_With_Function_Pointer(float a, float b, float (*pt2Func)(float, float))
{
float result = pt2Func(a, b); // call using function pointer

cout << "Switch replaced by function pointer: 2-5="; // display result
cout << result << endl;
}

// Execute example code
void Replace_A_Switch()
{
cout << endl << "Executing function 'Replace_A_Switch'" << endl;

Switch(2, 5, /* '+' specifies function 'Plus' to be executed */ '+');
Switch_With_Function_Pointer(2, 5, /* pointer to function 'Minus' */ &Minus);
}

char. driver

Bittoo . — Fri, 15 Jul 2016 09:31:04 +0000

RCS file: create_scull.c,v
Working file: create_scull.c
head: 1.67
branch:
locks: strict
root: 1.67
access list:
symbolic names:
keyword substitution: kv
total revisions: 67; selected revisions: 67
description:
this is a scull creating file
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revision 1.67 locked by: root;
date: 2016/07/09 09:58:59; author: root; state: Exp; lines: +2 -0
debugging
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revision 1.66
date: 2016/07/09 09:54:57; author: root; state: Exp; lines: +1 -0
debuging
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revision 1.65
date: 2016/07/09 09:41:14; author: root; state: Exp; lines: +1 -1
*** empty log message ***
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revision 1.64
date: 2016/07/09 07:24:22; author: root; state: Exp; lines: +3 -1
debugging scull
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revision 1.63
date: 2016/07/08 19:27:47; author: root; state: Exp; lines: +1 -1
debugging
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revision 1.62
date: 2016/07/08 19:22:39; author: root; state: Exp; lines: +5 -5
debugging
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revision 1.61
date: 2016/07/08 19:10:27; author: root; state: Exp; lines: +5 -5
debugging
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revision 1.60
date: 2016/07/08 18:48:02; author: root; state: Exp; lines: +1 -1
debugging
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revision 1.59
date: 2016/07/08 18:44:44; author: root; state: Exp; lines: +1 -1
debugging
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revision 1.58
date: 2016/07/08 18:13:03; author: root; state: Exp; lines: +0 -2
debugging.
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revision 1.57
date: 2016/07/08 02:57:17; author: root; state: Exp; lines: +6 -13
*** empty log message ***
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revision 1.56
date: 2016/07/06 07:16:15; author: root; state: Exp; lines: +1 -1
*** empty log message ***
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revision 1.55
date: 2016/07/06 07:13:45; author: root; state: Exp; lines: +1 -1
debugging
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revision 1.54
date: 2016/07/05 11:41:42; author: root; state: Exp; lines: +1 -1
*** empty log message ***
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revision 1.53
date: 2016/07/05 11:36:38; author: root; state: Exp; lines: +1 -1
*** empty log message ***
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revision 1.52
date: 2016/07/05 11:36:00; author: root; state: Exp; lines: +2 -1
*** empty log message ***
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revision 1.51
date: 2016/07/05 11:30:00; author: root; state: Exp; lines: +5 -3
*** empty log message ***
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revision 1.50
date: 2016/07/05 11:23:14; author: root; state: Exp; lines: +9 -7
debugging
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revision 1.49
date: 2016/07/05 11:14:54; author: root; state: Exp; lines: +1 -1
*** empty log message ***
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revision 1.48
date: 2016/07/05 11:12:46; author: root; state: Exp; lines: +2 -2
*** empty log message ***
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revision 1.47
date: 2016/07/05 10:47:28; author: root; state: Exp; lines: +2 -2
this is the file after debugging.
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revision 1.46
date: 2016/07/05 08:23:16; author: root; state: Exp; lines: +1 -0
debugging
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revision 1.45
date: 2016/07/05 08:21:21; author: root; state: Exp; lines: +2 -2
debugging
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revision 1.44
date: 2016/07/05 07:54:03; author: root; state: Exp; lines: +2 -4
debugging
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revision 1.43
date: 2016/07/05 07:01:35; author: root; state: Exp; lines: +1 -1
debugging
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revision 1.42
date: 2016/07/05 06:58:36; author: root; state: Exp; lines: +1 -1
debugging
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revision 1.41
date: 2016/07/05 06:57:10; author: root; state: Exp; lines: +4 -1
debugging
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revision 1.40
date: 2016/07/05 06:53:16; author: root; state: Exp; lines: +1 -1
*** empty log message ***
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revision 1.39
date: 2016/07/05 06:52:35; author: root; state: Exp; lines: +1 -1
no such change
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revision 1.38
date: 2016/07/05 06:29:38; author: root; state: Exp; lines: +4 -3
changing the value of to which it pointing
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revision 1.37
date: 2016/07/04 23:18:31; author: root; state: Exp; lines: +2 -2
*** empty log message ***
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revision 1.36
date: 2016/07/04 23:16:11; author: root; state: Exp; lines: +1 -1
*** empty log message ***
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revision 1.35
date: 2016/07/04 23:13:34; author: root; state: Exp; lines: +3 -5
*** empty log message ***
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revision 1.34
date: 2016/07/04 23:10:02; author: root; state: Exp; lines: +4 -3
printing a statement for debugging
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revision 1.33
date: 2016/07/04 23:01:33; author: root; state: Exp; lines: +1 -0
no such change
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revision 1.32
date: 2016/07/04 22:41:35; author: root; state: Exp; lines: +1 -1
*** empty log message ***
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revision 1.31
date: 2016/07/04 22:21:46; author: root; state: Exp; lines: +2 -2
*** empty log message ***
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revision 1.30
date: 2016/07/04 22:15:55; author: root; state: Exp; lines: +22 -22
no such change .
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revision 1.29
date: 2016/06/30 11:13:12; author: root; state: Exp; lines: +2 -2
debugging
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revision 1.28
date: 2016/06/30 11:04:22; author: root; state: Exp; lines: +3 -1
printing the addresses
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revision 1.27
date: 2016/06/30 10:47:14; author: root; state: Exp; lines: +28 -4
added a memory segment for quantum.
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revision 1.26
date: 2016/06/30 09:19:10; author: root; state: Exp; lines: +3 -2
checking the value of first and last pointer
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revision 1.25
date: 2016/06/30 09:02:19; author: root; state: Exp; lines: +3 -3
removing or debugging
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revision 1.24
date: 2016/06/30 08:54:33; author: root; state: Exp; lines: +1 -1
debugging
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revision 1.23
date: 2016/06/30 08:49:27; author: root; state: Exp; lines: +1 -1
*** empty log message ***
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revision 1.22
date: 2016/06/30 08:06:13; author: root; state: Exp; lines: +3 -4
edited the commant
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revision 1.21
date: 2016/06/30 07:28:48; author: root; state: Exp; lines: +2 -2
printing noqs for error
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revision 1.20
date: 2016/06/30 03:59:13; author: root; state: Exp; lines: +4 -3
Debugging
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revision 1.19
date: 2016/06/28 11:53:42; author: root; state: Exp; lines: +1 -1
*** empty log message ***
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revision 1.18
date: 2016/06/28 11:52:39; author: root; state: Exp; lines: +1 -0
debugging
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revision 1.17
date: 2016/06/28 11:47:03; author: root; state: Exp; lines: +2 -1
debugging
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revision 1.16
date: 2016/06/28 11:43:48; author: root; state: Exp; lines: +7 -0
*** empty log message ***
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revision 1.15
date: 2016/06/28 11:38:49; author: root; state: Exp; lines: +3 -2
removing a error
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revision 1.14
date: 2016/06/28 11:09:33; author: root; state: Exp; lines: +2 -3
just changing the variable name
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revision 1.13
date: 2016/06/28 07:35:20; author: root; state: Exp; lines: +1 -1
removing one error of memset
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revision 1.12
date: 2016/06/28 07:34:22; author: root; state: Exp; lines: +1 -1
removed one error
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revision 1.11
date: 2016/06/28 07:33:22; author: root; state: Exp; lines: +1 -1
removing error
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revision 1.10
date: 2016/06/28 07:23:14; author: root; state: Exp; lines: +1 -1
only a error of semicolon which is use to remove by adding a semicolon
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revision 1.9
date: 2016/06/28 07:22:12; author: root; state: Exp; lines: +8 -3
in this i use to initilise the qset now
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revision 1.8
date: 2016/06/28 06:14:12; author: root; state: Exp; lines: +17 -4
in this i use to
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revision 1.7
date: 2016/06/27 12:21:20; author: root; state: Exp; lines: +1 -2
*** empty log message ***
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revision 1.6
date: 2016/06/27 12:19:50; author: root; state: Exp; lines: +2 -2
*** empty log message ***
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revision 1.5
date: 2016/06/27 12:17:27; author: root; state: Exp; lines: +1 -4
*** empty log message ***
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revision 1.4
date: 2016/06/27 12:02:15; author: root; state: Exp; lines: +1 -2
no such change
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revision 1.3
date: 2016/06/27 12:00:39; author: root; state: Exp; lines: +4 -0
printing a error statement
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revision 1.2
date: 2016/06/27 11:55:14; author: root; state: Exp; lines: +1 -1
removing error
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revision 1.1
date: 2016/06/27 11:46:46; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: dev_open.c,v
Working file: dev_open.c
head: 1.6
branch:
locks: strict
root: 1.6
access list:
symbolic names:
keyword substitution: kv
total revisions: 6; selected revisions: 6
description:
this is a open call routine function
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revision 1.6 locked by: root;
date: 2016/06/28 06:15:30; author: root; state: Exp; lines: +3 -1
no such change
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revision 1.5
date: 2016/06/24 05:40:13; author: root; state: Exp; lines: +16 -1
in this i added i dev_trim function
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revision 1.4
date: 2016/06/23 10:24:20; author: root; state: Exp; lines: +3 -0
declaring the function of cointainer
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revision 1.3
date: 2016/06/23 08:24:02; author: root; state: Exp; lines: +1 -1
no such change
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revision 1.2
date: 2016/06/23 04:49:15; author: root; state: Exp; lines: +1 -1
in this file no such change had been done
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revision 1.1
date: 2016/06/21 11:15:07; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: dev_read.c,v
Working file: dev_read.c
head: 1.16
branch:
locks: strict
root: 1.16
access list:
symbolic names:
keyword substitution: kv
total revisions: 16; selected revisions: 16
description:
this is the read file routine
—————————-
revision 1.16 locked by: root;
date: 2016/07/12 09:46:45; author: root; state: Exp; lines: +2 -2
*** empty log message ***
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revision 1.15
date: 2016/07/12 08:39:17; author: root; state: Exp; lines: +1 -1
*** empty log message ***
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revision 1.14
date: 2016/07/12 08:24:52; author: root; state: Exp; lines: +2 -2
*** empty log message ***
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revision 1.13
date: 2016/07/12 08:21:13; author: root; state: Exp; lines: +2 -2
*** empty log message ***
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revision 1.12
date: 2016/07/12 08:15:10; author: root; state: Exp; lines: +1 -1
reading the offset position.
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revision 1.11
date: 2016/07/12 08:11:50; author: root; state: Exp; lines: +1 -1
*** empty log message ***
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revision 1.10
date: 2016/07/12 07:32:26; author: root; state: Exp; lines: +1 -0
*** empty log message ***
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revision 1.9
date: 2016/07/12 06:21:06; author: root; state: Exp; lines: +3 -0
reinitialising the file offset
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revision 1.8
date: 2016/07/12 05:56:28; author: root; state: Exp; lines: +5 -0
just getting the file offset position
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revision 1.7
date: 2016/07/11 12:32:02; author: root; state: Exp; lines: +2 -0
*** empty log message ***
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revision 1.6
date: 2016/07/11 12:26:28; author: root; state: Exp; lines: +1 -1
removing the error of noctw.
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revision 1.5
date: 2016/07/09 13:56:49; author: root; state: Exp; lines: +1 -1
no change
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revision 1.4
date: 2016/07/08 17:54:47; author: root; state: Exp; lines: +31 -2
added a prinrt statement for checking the value is coming or not
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revision 1.3
date: 2016/07/08 04:30:08; author: root; state: Exp; lines: +3 -0
no change
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revision 1.2
date: 2016/06/26 05:43:48; author: root; state: Exp; lines: +1 -1
this is read module file
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revision 1.1
date: 2016/06/24 11:41:30; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: dev_release.c,v
Working file: dev_release.c
head: 1.1
branch:
locks: strict
root: 1.1
access list:
symbolic names:
keyword substitution: kv
total revisions: 1; selected revisions: 1
description:
it’s a release file
routine
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revision 1.1 locked by: root;
date: 2016/07/09 13:57:01; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: dev_seek.c,v
Working file: dev_seek.c
head: 1.4
branch:
locks: strict
root: 1.4
access list:
symbolic names:
keyword substitution: kv
total revisions: 4; selected revisions: 4
description:
this is a lseek routine .
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revision 1.4 locked by: root;
date: 2016/07/12 08:11:53; author: root; state: Exp; lines: +2 -1
*** empty log message ***
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revision 1.3
date: 2016/07/12 07:21:00; author: root; state: Exp; lines: +1 -0
printing astatement
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revision 1.2
date: 2016/07/12 07:15:11; author: root; state: Exp; lines: +1 -0
derefrancing the f_pos of struct file
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revision 1.1
date: 2016/07/12 00:00:34; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: dev_trim.c,v
Working file: dev_trim.c
head: 1.3
branch:
locks: strict
root: 1.3
access list:
symbolic names:
keyword substitution: kv
total revisions: 3; selected revisions: 3
description:
this is the function of trimming the file
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revision 1.3 locked by: root;
date: 2016/07/08 04:30:20; author: root; state: Exp; lines: +23 -2
deleting the quantum and ALSO freeing the memory .
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revision 1.2
date: 2016/07/08 02:57:20; author: root; state: Exp; lines: +4 -0
no such change
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revision 1.1
date: 2016/06/24 05:40:42; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: dev_write.c,v
Working file: dev_write.c
head: 1.20
branch:
locks: strict
root: 1.20
access list:
symbolic names:
keyword substitution: kv
total revisions: 20; selected revisions: 20
description:
this is a write routine
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revision 1.20 locked by: root;
date: 2016/07/12 08:39:25; author: root; state: Exp; lines: +1 -1
*** empty log message ***
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revision 1.19
date: 2016/07/12 08:21:14; author: root; state: Exp; lines: +0 -2
..
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revision 1.18
date: 2016/07/12 08:15:31; author: root; state: Exp; lines: +1 -1
reading the offset position.
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revision 1.17
date: 2016/07/12 08:11:54; author: root; state: Exp; lines: +1 -1
*** empty log message ***
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revision 1.16
date: 2016/07/12 07:32:28; author: root; state: Exp; lines: +3 -1
*** empty log message ***
—————————-
revision 1.15
date: 2016/07/12 06:21:39; author: root; state: Exp; lines: +5 -0
reinitialising the file offset
—————————-
revision 1.14
date: 2016/07/12 05:56:55; author: root; state: Exp; lines: +4 -1
just getting the file offset position
—————————-
revision 1.13
date: 2016/07/08 18:08:18; author: root; state: Exp; lines: +1 -2
debugging
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revision 1.12
date: 2016/07/08 17:55:24; author: root; state: Exp; lines: +3 -2
*** empty log message ***
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revision 1.11
date: 2016/07/08 05:18:43; author: root; state: Exp; lines: +1 -1
removing the error of looping.
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revision 1.10
date: 2016/07/08 05:03:39; author: root; state: Exp; lines: +1 -1
printing veriable i.
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revision 1.9
date: 2016/07/08 02:57:31; author: root; state: Exp; lines: +10 -10
no change
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revision 1.8
date: 2016/07/05 11:08:44; author: root; state: Exp; lines: +7 -6
removing the error .
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revision 1.7
date: 2016/07/05 10:48:05; author: root; state: Exp; lines: +22 -2
in this a copy_from_user function is decleared
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revision 1.6
date: 2016/07/04 20:47:30; author: root; state: Exp; lines: +1 -1
recorrecting the error
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revision 1.5
date: 2016/07/04 20:45:17; author: root; state: Exp; lines: +1 -1
returning the required bytes
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revision 1.4
date: 2016/06/27 11:51:22; author: root; state: Exp; lines: +3 -3
edited the errors
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revision 1.3
date: 2016/06/27 11:47:05; author: root; state: Exp; lines: +17 -0
here calling of create_scull and another variables
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revision 1.2
date: 2016/06/24 10:29:09; author: root; state: Exp; lines: +1 -1
declearing the type of write function
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revision 1.1
date: 2016/06/24 10:21:49; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: insert_drivr.c,v
Working file: insert_drivr.c
head: 1.20
branch:
locks: strict
root: 1.20
access list:
symbolic names:
keyword substitution: kv
total revisions: 20; selected revisions: 20
description:
this file is a file of inserting a driver in kernal,i.e the driver start from here
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revision 1.20 locked by: root;
date: 2016/07/14 04:20:09; author: root; state: Exp; lines: +5 -0
added a semaphore initialisation
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revision 1.19
date: 2016/06/27 11:47:43; author: root; state: Exp; lines: +10 -10
*** empty log message ***
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revision 1.18
date: 2016/06/26 06:25:43; author: root; state: Exp; lines: +1 -1
changing the value of arguement of MKDEV FUNCTION
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revision 1.17
date: 2016/06/26 06:22:30; author: root; state: Exp; lines: +1 -1
*** empty log message ***
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revision 1.16
date: 2016/06/26 06:19:07; author: root; state: Exp; lines: +1 -1
removing 1 error of semicolon
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revision 1.15
date: 2016/06/26 06:17:28; author: root; state: Exp; lines: +8 -6
in this i use to varible and increase the no. of nodes
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revision 1.14
date: 2016/06/24 06:05:02; author: root; state: Exp; lines: +1 -1
*** empty log message ***
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revision 1.13
date: 2016/06/24 05:50:12; author: root; state: Exp; lines: +3 -3
no such changes
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revision 1.12
date: 2016/06/23 09:03:18; author: root; state: Exp; lines: +4 -0
adding some of the functions which is defined in fs.h
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revision 1.11
date: 2016/06/23 08:24:24; author: root; state: Exp; lines: +0 -1
removed changes
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revision 1.10
date: 2016/06/23 04:49:38; author: root; state: Exp; lines: +2 -2
no such change
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revision 1.9
date: 2016/06/21 11:16:06; author: root; state: Exp; lines: +11 -1
in this no such change occur
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revision 1.8
date: 2016/06/18 11:26:07; author: root; state: Exp; lines: +5 -1
i decleared the cdev function and and file_operation structeure’s variable
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revision 1.7
date: 2016/06/18 07:52:02; author: root; state: Exp; lines: +3 -3
in this i initilise the dev veriable
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revision 1.6
date: 2016/06/18 05:40:48; author: root; state: Exp; lines: +10 -1
in this file i use to change the kmalloc()
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revision 1.5
date: 2016/06/17 07:38:13; author: root; state: Exp; lines: +1 -0
some of the changes done after getting error
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revision 1.4
date: 2016/06/17 07:01:53; author: root; state: Exp; lines: +1 -1
no such change
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revision 1.3
date: 2016/06/17 06:59:33; author: root; state: Exp; lines: +5 -1
just adding a semicolon
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revision 1.2
date: 2016/06/17 06:50:27; author: root; state: Exp; lines: +7 -1
in this i register alloc_chrdev_region() function
which is use to register the driver
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revision 1.1
date: 2016/06/16 05:37:33; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: rm_drivr.c,v
Working file: rm_drivr.c
head: 1.11
branch:
locks: strict
root: 1.11
access list:
symbolic names:
keyword substitution: kv
total revisions: 11; selected revisions: 11
description:
this file is for removing that driver from kernal module
—————————-
revision 1.11 locked by: root;
date: 2016/06/28 10:20:12; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.10
date: 2016/06/28 10:18:51; author: root; state: Exp; lines: +3 -1
defining the no. of dev element to deleted
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revision 1.9
date: 2016/06/27 11:47:48; author: root; state: Exp; lines: +1 -1
no change
,.
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revision 1.8
date: 2016/06/23 05:08:12; author: root; state: Exp; lines: +1 -1
changing the variable NOD to nod
—————————-
revision 1.7
date: 2016/06/21 11:17:17; author: root; state: Exp; lines: +3 -1
added some of func. i.e. kfree and also cdev_del
—————————-
revision 1.6
date: 2016/06/18 11:27:39; author: root; state: Exp; lines: +1 -0
no changw
—————————-
revision 1.5
date: 2016/06/18 07:52:32; author: root; state: Exp; lines: +1 -0
may be any change
—————————-
revision 1.4
date: 2016/06/18 05:41:18; author: root; state: Exp; lines: +1 -0
in this i use to initilise the kfree()
—————————-
revision 1.3
date: 2016/06/17 07:03:52; author: root; state: Exp; lines: +1 -1
in this file i use to add declaration.h file
—————————-
revision 1.2
date: 2016/06/17 06:52:37; author: root; state: Exp; lines: +1 -0
in this i use to unregister_chrdev_region() fun calling which is use to unregisterthe driver
—————————-
revision 1.1
date: 2016/06/16 05:38:39; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: declaration.h,v
Working file: declaration.h
head: 1.15
branch:
locks: strict
root: 1.15
access list:
symbolic names:
keyword substitution: kv
total revisions: 15; selected revisions: 15
description:
in this there is a decleration of major no.
minorno.
and dev_id and also no. of nodes
—————————-
revision 1.15 locked by: root;
date: 2016/07/14 04:20:34; author: root; state: Exp; lines: +1 -0
decleration of semaphore variable
—————————-
revision 1.14
date: 2016/07/12 00:01:02; author: root; state: Exp; lines: +1 -0
decleration of dev_lseek
—————————-
revision 1.13
date: 2016/07/09 13:57:27; author: root; state: Exp; lines: +1 -0
decleared a dev_release routine
—————————-
revision 1.12
date: 2016/07/05 11:09:21; author: root; state: Exp; lines: +1 -1
no change
—————————-
revision 1.11
date: 2016/07/05 10:48:36; author: root; state: Exp; lines: +3 -1
decleration of datasize and devicesize
—————————-
revision 1.10
date: 2016/06/27 11:43:52; author: root; state: Exp; lines: +7 -5
declearation of quantumsize and qset
—————————-
revision 1.9
date: 2016/06/26 05:57:27; author: root; state: Exp; lines: +1 -1
‘
—————————-
revision 1.8
date: 2016/06/24 11:46:22; author: root; state: Exp; lines: +1 -0
*** empty log message ***
—————————-
revision 1.7
date: 2016/06/24 10:22:03; author: root; state: Exp; lines: +1 -0
declearing the dev_write function
—————————-
revision 1.6
date: 2016/06/24 06:08:50; author: root; state: Exp; lines: +1 -1
added a semicolon
—————————-
revision 1.5
date: 2016/06/24 05:41:08; author: root; state: Exp; lines: +1 -0
in this i decleared the prototype of dev_trim
—————————-
revision 1.4
date: 2016/06/23 04:50:17; author: root; state: Exp; lines: +1 -1
no such change
—————————-
revision 1.3
date: 2016/06/21 11:18:02; author: root; state: Exp; lines: +1 -0
some of the declaration i.e. open call func.
—————————-
revision 1.2
date: 2016/06/18 05:41:46; author: root; state: Exp; lines: +15 -1
in this i declare the dev and qset structure
—————————-
revision 1.1
date: 2016/06/17 06:54:11; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: file_operation.h,v
Working file: file_operation.h
head: 1.11
branch:
locks: strict
root: 1.11
access list:
symbolic names:
keyword substitution: kv
total revisions: 11; selected revisions: 11
description:
this is a file operation file
—————————-
revision 1.11 locked by: root;
date: 2016/07/12 00:01:26; author: root; state: Exp; lines: +2 -1
routine mapping
—————————-
revision 1.10
date: 2016/07/09 13:57:50; author: root; state: Exp; lines: +1 -1
prototype of dev_release
funtion
—————————-
revision 1.9
date: 2016/06/24 11:41:56; author: root; state: Exp; lines: +2 -1
added read file routine structure
—————————-
revision 1.8
date: 2016/06/24 10:26:13; author: root; state: Exp; lines: +2 -2
*** empty log message ***
—————————-
revision 1.7
date: 2016/06/24 10:24:19; author: root; state: Exp; lines: +1 -1
commenting the release call
—————————-
revision 1.6
date: 2016/06/24 10:22:34; author: root; state: Exp; lines: +3 -1
added the dev_write structure variable
—————————-
revision 1.5
date: 2016/06/24 06:05:08; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.4
date: 2016/06/23 04:50:54; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.3
date: 2016/06/23 04:06:10; author: root; state: Exp; lines: +1 -1
no change
—————————-
revision 1.2
date: 2016/06/21 11:18:38; author: root; state: Exp; lines: +4 -1
this is the open call routine structure
—————————-
revision 1.1
date: 2016/06/18 11:28:04; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: header.h,v
Working file: header.h
head: 1.13
branch:
locks: strict
root: 1.13
access list:
symbolic names:
keyword substitution: kv
total revisions: 13; selected revisions: 13
description:
this is a header file for driver in which the driver’s header file is use to pull from user space
—————————-
revision 1.13 locked by: root;
date: 2016/07/05 10:49:00; author: root; state: Exp; lines: +9 -0
macro devicesize and datasize
—————————-
revision 1.12
date: 2016/06/30 10:47:38; author: root; state: Exp; lines: +1 -1
making the size of qset 8.
—————————-
revision 1.11
date: 2016/06/30 09:06:19; author: root; state: Exp; lines: +1 -1
decreasing qsetsize value
—————————-
revision 1.10
date: 2016/06/27 11:55:46; author: root; state: Exp; lines: +1 -1
removing error
—————————-
revision 1.9
date: 2016/06/27 11:44:27; author: root; state: Exp; lines: +13 -0
Quantumsize and qsetsize macro decleared
—————————-
revision 1.8
date: 2016/06/23 10:28:39; author: root; state: Exp; lines: +1 -1
corrcting the name of header file
—————————-
revision 1.7
date: 2016/06/23 10:24:52; author: root; state: Exp; lines: +1 -0
in this i added the header file kernel.h
—————————-
revision 1.6
date: 2016/06/23 08:24:53; author: root; state: Exp; lines: +2 -3
no such change
—————————-
revision 1.5
date: 2016/06/23 04:50:58; author: root; state: Exp; lines: +3 -2
*** empty log message ***
—————————-
revision 1.4
date: 2016/06/21 11:19:05; author: root; state: Exp; lines: +6 -0
some of the header files for chracter drivr
—————————-
revision 1.3
date: 2016/06/18 05:42:36; author: root; state: Exp; lines: +5 -1
in this i use to initilise no. of devices
—————————-
revision 1.2
date: 2016/06/17 06:55:29; author: root; state: Exp; lines: +14 -0
in this there is a macro of Device name major no minor no and no. od nodes
—————————-
revision 1.1
date: 2016/06/16 05:39:49; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: insert_drivr.c,v
Working file: insert_drivr.c
head: 1.1
branch:
locks: strict
root: 1.1
access list:
symbolic names:
keyword substitution: kv
total revisions: 1; selected revisions: 1
description:
this file is a file of inserting a driver in kernal,i.e the driver start from here
—————————-
revision 1.1 locked by: root;
date: 2016/06/16 05:37:33; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: rm_drivr.c,v
Working file: rm_drivr.c
head: 1.1
branch:
locks: strict
root: 1.1
access list:
symbolic names:
keyword substitution: kv
total revisions: 1; selected revisions: 1
description:
this file is for removing that driver from kernal module
—————————-
revision 1.1 locked by: root;
date: 2016/06/16 05:38:39; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: header.h,v
Working file: header.h
head: 1.1
branch:
locks: strict
root: 1.1
access list:
symbolic names:
keyword substitution: kv
total revisions: 1; selected revisions: 1
description:
this is a header file for driver in which the driver’s header file is use to pull from user space
—————————-
revision 1.1 locked by: root;
date: 2016/06/16 05:39:49; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: insert_drivr.c,v
Working file: insert_drivr.c
head: 1.8
branch:
locks: strict
root: 1.8
access list:
symbolic names:
keyword substitution: kv
total revisions: 8; selected revisions: 8
description:
this file is a file of inserting a driver in kernal,i.e the driver start from here
—————————-
revision 1.8 locked by: root;
date: 2016/06/18 11:26:07; author: root; state: Exp; lines: +5 -1
i decleared the cdev function and and file_operation structeure’s variable
—————————-
revision 1.7
date: 2016/06/18 07:52:02; author: root; state: Exp; lines: +3 -3
in this i initilise the dev veriable
—————————-
revision 1.6
date: 2016/06/18 05:40:48; author: root; state: Exp; lines: +10 -1
in this file i use to change the kmalloc()
—————————-
revision 1.5
date: 2016/06/17 07:38:13; author: root; state: Exp; lines: +1 -0
some of the changes done after getting error
—————————-
revision 1.4
date: 2016/06/17 07:01:53; author: root; state: Exp; lines: +1 -1
no such change
—————————-
revision 1.3
date: 2016/06/17 06:59:33; author: root; state: Exp; lines: +5 -1
just adding a semicolon
—————————-
revision 1.2
date: 2016/06/17 06:50:27; author: root; state: Exp; lines: +7 -1
in this i register alloc_chrdev_region() function
which is use to register the driver
—————————-
revision 1.1
date: 2016/06/16 05:37:33; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: rm_drivr.c,v
Working file: rm_drivr.c
head: 1.6
branch:
locks: strict
root: 1.6
access list:
symbolic names:
keyword substitution: kv
total revisions: 6; selected revisions: 6
description:
this file is for removing that driver from kernal module
—————————-
revision 1.6 locked by: root;
date: 2016/06/18 11:27:39; author: root; state: Exp; lines: +1 -0
no changw
—————————-
revision 1.5
date: 2016/06/18 07:52:32; author: root; state: Exp; lines: +1 -0
may be any change
—————————-
revision 1.4
date: 2016/06/18 05:41:18; author: root; state: Exp; lines: +1 -0
in this i use to initilise the kfree()
—————————-
revision 1.3
date: 2016/06/17 07:03:52; author: root; state: Exp; lines: +1 -1
in this file i use to add declaration.h file
—————————-
revision 1.2
date: 2016/06/17 06:52:37; author: root; state: Exp; lines: +1 -0
in this i use to unregister_chrdev_region() fun calling which is use to unregisterthe driver
—————————-
revision 1.1
date: 2016/06/16 05:38:39; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: declaration.h,v
Working file: declaration.h
head: 1.2
branch:
locks: strict
root: 1.2
access list:
symbolic names:
keyword substitution: kv
total revisions: 2; selected revisions: 2
description:
in this there is a decleration of major no.
minorno.
and dev_id and also no. of nodes
—————————-
revision 1.2 locked by: root;
date: 2016/06/18 05:41:46; author: root; state: Exp; lines: +15 -1
in this i declare the dev and qset structure
—————————-
revision 1.1
date: 2016/06/17 06:54:11; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: file_operation.h,v
Working file: file_operation.h
head: 1.1
branch:
locks: strict
root: 1.1
access list:
symbolic names:
keyword substitution: kv
total revisions: 1; selected revisions: 1
description:
this is a file operation file
—————————-
revision 1.1 locked by: root;
date: 2016/06/18 11:28:04; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: header.h,v
Working file: header.h
head: 1.3
branch:
locks: strict
root: 1.3
access list:
symbolic names:
keyword substitution: kv
total revisions: 3; selected revisions: 3
description:
this is a header file for driver in which the driver’s header file is use to pull from user space
—————————-
revision 1.3 locked by: root;
date: 2016/06/18 05:42:36; author: root; state: Exp; lines: +5 -1
in this i use to initilise no. of devices
—————————-
revision 1.2
date: 2016/06/17 06:55:29; author: root; state: Exp; lines: +14 -0
in this there is a macro of Device name major no minor no and no. od nodes
—————————-
revision 1.1
date: 2016/06/16 05:39:49; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: dev_open.c,v
Working file: dev_open.c
head: 1.5
branch:
locks: strict
root: 1.5
access list:
symbolic names:
keyword substitution: kv
total revisions: 5; selected revisions: 5
description:
this is a open call routine function
—————————-
revision 1.5 locked by: root;
date: 2016/06/24 05:40:13; author: root; state: Exp; lines: +16 -1
in this i added i dev_trim function
—————————-
revision 1.4
date: 2016/06/23 10:24:20; author: root; state: Exp; lines: +3 -0
declaring the function of cointainer
—————————-
revision 1.3
date: 2016/06/23 08:24:02; author: root; state: Exp; lines: +1 -1
no such change
—————————-
revision 1.2
date: 2016/06/23 04:49:15; author: root; state: Exp; lines: +1 -1
in this file no such change had been done
—————————-
revision 1.1
date: 2016/06/21 11:15:07; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: dev_read.c,v
Working file: dev_read.c
head: 1.2
branch:
locks: strict
root: 1.2
access list:
symbolic names:
keyword substitution: kv
total revisions: 2; selected revisions: 2
description:
this is the read file routine
—————————-
revision 1.2 locked by: root;
date: 2016/06/26 05:43:48; author: root; state: Exp; lines: +1 -1
this is read module file
—————————-
revision 1.1
date: 2016/06/24 11:41:30; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: dev_trim.c,v
Working file: dev_trim.c
head: 1.1
branch:
locks: strict
root: 1.1
access list:
symbolic names:
keyword substitution: kv
total revisions: 1; selected revisions: 1
description:
this is the function of trimming the file
—————————-
revision 1.1 locked by: root;
date: 2016/06/24 05:40:42; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: dev_write.c,v
Working file: dev_write.c
head: 1.2
branch:
locks: strict
root: 1.2
access list:
symbolic names:
keyword substitution: kv
total revisions: 2; selected revisions: 2
description:
this is a write routine
—————————-
revision 1.2 locked by: root;
date: 2016/06/24 10:29:09; author: root; state: Exp; lines: +1 -1
declearing the type of write function
—————————-
revision 1.1
date: 2016/06/24 10:21:49; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: insert_drivr.c,v
Working file: insert_drivr.c
head: 1.18
branch:
locks: strict
root: 1.18
access list:
symbolic names:
keyword substitution: kv
total revisions: 18; selected revisions: 18
description:
this file is a file of inserting a driver in kernal,i.e the driver start from here
—————————-
revision 1.18 locked by: root;
date: 2016/06/26 06:25:43; author: root; state: Exp; lines: +1 -1
changing the value of arguement of MKDEV FUNCTION
—————————-
revision 1.17
date: 2016/06/26 06:22:30; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.16
date: 2016/06/26 06:19:07; author: root; state: Exp; lines: +1 -1
removing 1 error of semicolon
—————————-
revision 1.15
date: 2016/06/26 06:17:28; author: root; state: Exp; lines: +8 -6
in this i use to varible and increase the no. of nodes
—————————-
revision 1.14
date: 2016/06/24 06:05:02; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.13
date: 2016/06/24 05:50:12; author: root; state: Exp; lines: +3 -3
no such changes
—————————-
revision 1.12
date: 2016/06/23 09:03:18; author: root; state: Exp; lines: +4 -0
adding some of the functions which is defined in fs.h
—————————-
revision 1.11
date: 2016/06/23 08:24:24; author: root; state: Exp; lines: +0 -1
removed changes
—————————-
revision 1.10
date: 2016/06/23 04:49:38; author: root; state: Exp; lines: +2 -2
no such change
—————————-
revision 1.9
date: 2016/06/21 11:16:06; author: root; state: Exp; lines: +11 -1
in this no such change occur
—————————-
revision 1.8
date: 2016/06/18 11:26:07; author: root; state: Exp; lines: +5 -1
i decleared the cdev function and and file_operation structeure’s variable
—————————-
revision 1.7
date: 2016/06/18 07:52:02; author: root; state: Exp; lines: +3 -3
in this i initilise the dev veriable
—————————-
revision 1.6
date: 2016/06/18 05:40:48; author: root; state: Exp; lines: +10 -1
in this file i use to change the kmalloc()
—————————-
revision 1.5
date: 2016/06/17 07:38:13; author: root; state: Exp; lines: +1 -0
some of the changes done after getting error
—————————-
revision 1.4
date: 2016/06/17 07:01:53; author: root; state: Exp; lines: +1 -1
no such change
—————————-
revision 1.3
date: 2016/06/17 06:59:33; author: root; state: Exp; lines: +5 -1
just adding a semicolon
—————————-
revision 1.2
date: 2016/06/17 06:50:27; author: root; state: Exp; lines: +7 -1
in this i register alloc_chrdev_region() function
which is use to register the driver
—————————-
revision 1.1
date: 2016/06/16 05:37:33; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: rm_drivr.c,v
Working file: rm_drivr.c
head: 1.8
branch:
locks: strict
root: 1.8
access list:
symbolic names:
keyword substitution: kv
total revisions: 8; selected revisions: 8
description:
this file is for removing that driver from kernal module
—————————-
revision 1.8 locked by: root;
date: 2016/06/23 05:08:12; author: root; state: Exp; lines: +1 -1
changing the variable NOD to nod
—————————-
revision 1.7
date: 2016/06/21 11:17:17; author: root; state: Exp; lines: +3 -1
added some of func. i.e. kfree and also cdev_del
—————————-
revision 1.6
date: 2016/06/18 11:27:39; author: root; state: Exp; lines: +1 -0
no changw
—————————-
revision 1.5
date: 2016/06/18 07:52:32; author: root; state: Exp; lines: +1 -0
may be any change
—————————-
revision 1.4
date: 2016/06/18 05:41:18; author: root; state: Exp; lines: +1 -0
in this i use to initilise the kfree()
—————————-
revision 1.3
date: 2016/06/17 07:03:52; author: root; state: Exp; lines: +1 -1
in this file i use to add declaration.h file
—————————-
revision 1.2
date: 2016/06/17 06:52:37; author: root; state: Exp; lines: +1 -0
in this i use to unregister_chrdev_region() fun calling which is use to unregisterthe driver
—————————-
revision 1.1
date: 2016/06/16 05:38:39; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: declaration.h,v
Working file: declaration.h
head: 1.9
branch:
locks: strict
root: 1.9
access list:
symbolic names:
keyword substitution: kv
total revisions: 9; selected revisions: 9
description:
in this there is a decleration of major no.
minorno.
and dev_id and also no. of nodes
—————————-
revision 1.9 locked by: root;
date: 2016/06/26 05:57:27; author: root; state: Exp; lines: +1 -1
‘
—————————-
revision 1.8
date: 2016/06/24 11:46:22; author: root; state: Exp; lines: +1 -0
*** empty log message ***
—————————-
revision 1.7
date: 2016/06/24 10:22:03; author: root; state: Exp; lines: +1 -0
declearing the dev_write function
—————————-
revision 1.6
date: 2016/06/24 06:08:50; author: root; state: Exp; lines: +1 -1
added a semicolon
—————————-
revision 1.5
date: 2016/06/24 05:41:08; author: root; state: Exp; lines: +1 -0
in this i decleared the prototype of dev_trim
—————————-
revision 1.4
date: 2016/06/23 04:50:17; author: root; state: Exp; lines: +1 -1
no such change
—————————-
revision 1.3
date: 2016/06/21 11:18:02; author: root; state: Exp; lines: +1 -0
some of the declaration i.e. open call func.
—————————-
revision 1.2
date: 2016/06/18 05:41:46; author: root; state: Exp; lines: +15 -1
in this i declare the dev and qset structure
—————————-
revision 1.1
date: 2016/06/17 06:54:11; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: file_operation.h,v
Working file: file_operation.h
head: 1.9
branch:
locks: strict
root: 1.9
access list:
symbolic names:
keyword substitution: kv
total revisions: 9; selected revisions: 9
description:
this is a file operation file
—————————-
revision 1.9 locked by: root;
date: 2016/06/24 11:41:56; author: root; state: Exp; lines: +2 -1
added read file routine structure
—————————-
revision 1.8
date: 2016/06/24 10:26:13; author: root; state: Exp; lines: +2 -2
*** empty log message ***
—————————-
revision 1.7
date: 2016/06/24 10:24:19; author: root; state: Exp; lines: +1 -1
commenting the release call
—————————-
revision 1.6
date: 2016/06/24 10:22:34; author: root; state: Exp; lines: +3 -1
added the dev_write structure variable
—————————-
revision 1.5
date: 2016/06/24 06:05:08; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.4
date: 2016/06/23 04:50:54; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.3
date: 2016/06/23 04:06:10; author: root; state: Exp; lines: +1 -1
no change
—————————-
revision 1.2
date: 2016/06/21 11:18:38; author: root; state: Exp; lines: +4 -1
this is the open call routine structure
—————————-
revision 1.1
date: 2016/06/18 11:28:04; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: header.h,v
Working file: header.h
head: 1.8
branch:
locks: strict
root: 1.8
access list:
symbolic names:
keyword substitution: kv
total revisions: 8; selected revisions: 8
description:
this is a header file for driver in which the driver’s header file is use to pull from user space
—————————-
revision 1.8 locked by: root;
date: 2016/06/23 10:28:39; author: root; state: Exp; lines: +1 -1
corrcting the name of header file
—————————-
revision 1.7
date: 2016/06/23 10:24:52; author: root; state: Exp; lines: +1 -0
in this i added the header file kernel.h
—————————-
revision 1.6
date: 2016/06/23 08:24:53; author: root; state: Exp; lines: +2 -3
no such change
—————————-
revision 1.5
date: 2016/06/23 04:50:58; author: root; state: Exp; lines: +3 -2
*** empty log message ***
—————————-
revision 1.4
date: 2016/06/21 11:19:05; author: root; state: Exp; lines: +6 -0
some of the header files for chracter drivr
—————————-
revision 1.3
date: 2016/06/18 05:42:36; author: root; state: Exp; lines: +5 -1
in this i use to initilise no. of devices
—————————-
revision 1.2
date: 2016/06/17 06:55:29; author: root; state: Exp; lines: +14 -0
in this there is a macro of Device name major no minor no and no. od nodes
—————————-
revision 1.1
date: 2016/06/16 05:39:49; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: create_scull.c,v
Working file: create_scull.c
head: 1.19
branch:
locks: strict
root: 1.19
access list:
symbolic names:
keyword substitution: kv
total revisions: 19; selected revisions: 19
description:
this is a scull creating file
—————————-
revision 1.19 locked by: root;
date: 2016/06/28 11:53:42; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.18
date: 2016/06/28 11:52:39; author: root; state: Exp; lines: +1 -0
debugging
—————————-
revision 1.17
date: 2016/06/28 11:47:03; author: root; state: Exp; lines: +2 -1
debugging
—————————-
revision 1.16
date: 2016/06/28 11:43:48; author: root; state: Exp; lines: +7 -0
*** empty log message ***
—————————-
revision 1.15
date: 2016/06/28 11:38:49; author: root; state: Exp; lines: +3 -2
removing a error
—————————-
revision 1.14
date: 2016/06/28 11:09:33; author: root; state: Exp; lines: +2 -3
just changing the variable name
—————————-
revision 1.13
date: 2016/06/28 07:35:20; author: root; state: Exp; lines: +1 -1
removing one error of memset
—————————-
revision 1.12
date: 2016/06/28 07:34:22; author: root; state: Exp; lines: +1 -1
removed one error
—————————-
revision 1.11
date: 2016/06/28 07:33:22; author: root; state: Exp; lines: +1 -1
removing error
—————————-
revision 1.10
date: 2016/06/28 07:23:14; author: root; state: Exp; lines: +1 -1
only a error of semicolon which is use to remove by adding a semicolon
—————————-
revision 1.9
date: 2016/06/28 07:22:12; author: root; state: Exp; lines: +8 -3
in this i use to initilise the qset now
—————————-
revision 1.8
date: 2016/06/28 06:14:12; author: root; state: Exp; lines: +17 -4
in this i use to
—————————-
revision 1.7
date: 2016/06/27 12:21:20; author: root; state: Exp; lines: +1 -2
*** empty log message ***
—————————-
revision 1.6
date: 2016/06/27 12:19:50; author: root; state: Exp; lines: +2 -2
*** empty log message ***
—————————-
revision 1.5
date: 2016/06/27 12:17:27; author: root; state: Exp; lines: +1 -4
*** empty log message ***
—————————-
revision 1.4
date: 2016/06/27 12:02:15; author: root; state: Exp; lines: +1 -2
no such change
—————————-
revision 1.3
date: 2016/06/27 12:00:39; author: root; state: Exp; lines: +4 -0
printing a error statement
—————————-
revision 1.2
date: 2016/06/27 11:55:14; author: root; state: Exp; lines: +1 -1
removing error
—————————-
revision 1.1
date: 2016/06/27 11:46:46; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: dev_write.c,v
Working file: dev_write.c
head: 1.4
branch:
locks: strict
root: 1.4
access list:
symbolic names:
keyword substitution: kv
total revisions: 4; selected revisions: 4
description:
this is a write routine
—————————-
revision 1.4 locked by: root;
date: 2016/06/27 11:51:22; author: root; state: Exp; lines: +3 -3
edited the errors
—————————-
revision 1.3
date: 2016/06/27 11:47:05; author: root; state: Exp; lines: +17 -0
here calling of create_scull and another variables
—————————-
revision 1.2
date: 2016/06/24 10:29:09; author: root; state: Exp; lines: +1 -1
declearing the type of write function
—————————-
revision 1.1
date: 2016/06/24 10:21:49; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: insert_drivr.c,v
Working file: insert_drivr.c
head: 1.19
branch:
locks: strict
root: 1.19
access list:
symbolic names:
keyword substitution: kv
total revisions: 19; selected revisions: 19
description:
this file is a file of inserting a driver in kernal,i.e the driver start from here
—————————-
revision 1.19 locked by: root;
date: 2016/06/27 11:47:43; author: root; state: Exp; lines: +10 -10
*** empty log message ***
—————————-
revision 1.18
date: 2016/06/26 06:25:43; author: root; state: Exp; lines: +1 -1
changing the value of arguement of MKDEV FUNCTION
—————————-
revision 1.17
date: 2016/06/26 06:22:30; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.16
date: 2016/06/26 06:19:07; author: root; state: Exp; lines: +1 -1
removing 1 error of semicolon
—————————-
revision 1.15
date: 2016/06/26 06:17:28; author: root; state: Exp; lines: +8 -6
in this i use to varible and increase the no. of nodes
—————————-
revision 1.14
date: 2016/06/24 06:05:02; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.13
date: 2016/06/24 05:50:12; author: root; state: Exp; lines: +3 -3
no such changes
—————————-
revision 1.12
date: 2016/06/23 09:03:18; author: root; state: Exp; lines: +4 -0
adding some of the functions which is defined in fs.h
—————————-
revision 1.11
date: 2016/06/23 08:24:24; author: root; state: Exp; lines: +0 -1
removed changes
—————————-
revision 1.10
date: 2016/06/23 04:49:38; author: root; state: Exp; lines: +2 -2
no such change
—————————-
revision 1.9
date: 2016/06/21 11:16:06; author: root; state: Exp; lines: +11 -1
in this no such change occur
—————————-
revision 1.8
date: 2016/06/18 11:26:07; author: root; state: Exp; lines: +5 -1
i decleared the cdev function and and file_operation structeure’s variable
—————————-
revision 1.7
date: 2016/06/18 07:52:02; author: root; state: Exp; lines: +3 -3
in this i initilise the dev veriable
—————————-
revision 1.6
date: 2016/06/18 05:40:48; author: root; state: Exp; lines: +10 -1
in this file i use to change the kmalloc()
—————————-
revision 1.5
date: 2016/06/17 07:38:13; author: root; state: Exp; lines: +1 -0
some of the changes done after getting error
—————————-
revision 1.4
date: 2016/06/17 07:01:53; author: root; state: Exp; lines: +1 -1
no such change
—————————-
revision 1.3
date: 2016/06/17 06:59:33; author: root; state: Exp; lines: +5 -1
just adding a semicolon
—————————-
revision 1.2
date: 2016/06/17 06:50:27; author: root; state: Exp; lines: +7 -1
in this i register alloc_chrdev_region() function
which is use to register the driver
—————————-
revision 1.1
date: 2016/06/16 05:37:33; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: declaration.h,v
Working file: declaration.h
head: 1.10
branch:
locks: strict
root: 1.10
access list:
symbolic names:
keyword substitution: kv
total revisions: 10; selected revisions: 10
description:
in this there is a decleration of major no.
minorno.
and dev_id and also no. of nodes
—————————-
revision 1.10 locked by: root;
date: 2016/06/27 11:43:52; author: root; state: Exp; lines: +7 -5
declearation of quantumsize and qset
—————————-
revision 1.9
date: 2016/06/26 05:57:27; author: root; state: Exp; lines: +1 -1
‘
—————————-
revision 1.8
date: 2016/06/24 11:46:22; author: root; state: Exp; lines: +1 -0
*** empty log message ***
—————————-
revision 1.7
date: 2016/06/24 10:22:03; author: root; state: Exp; lines: +1 -0
declearing the dev_write function
—————————-
revision 1.6
date: 2016/06/24 06:08:50; author: root; state: Exp; lines: +1 -1
added a semicolon
—————————-
revision 1.5
date: 2016/06/24 05:41:08; author: root; state: Exp; lines: +1 -0
in this i decleared the prototype of dev_trim
—————————-
revision 1.4
date: 2016/06/23 04:50:17; author: root; state: Exp; lines: +1 -1
no such change
—————————-
revision 1.3
date: 2016/06/21 11:18:02; author: root; state: Exp; lines: +1 -0
some of the declaration i.e. open call func.
—————————-
revision 1.2
date: 2016/06/18 05:41:46; author: root; state: Exp; lines: +15 -1
in this i declare the dev and qset structure
—————————-
revision 1.1
date: 2016/06/17 06:54:11; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: header.h,v
Working file: header.h
head: 1.10
branch:
locks: strict
root: 1.10
access list:
symbolic names:
keyword substitution: kv
total revisions: 10; selected revisions: 10
description:
this is a header file for driver in which the driver’s header file is use to pull from user space
—————————-
revision 1.10 locked by: root;
date: 2016/06/27 11:55:46; author: root; state: Exp; lines: +1 -1
removing error
—————————-
revision 1.9
date: 2016/06/27 11:44:27; author: root; state: Exp; lines: +13 -0
Quantumsize and qsetsize macro decleared
—————————-
revision 1.8
date: 2016/06/23 10:28:39; author: root; state: Exp; lines: +1 -1
corrcting the name of header file
—————————-
revision 1.7
date: 2016/06/23 10:24:52; author: root; state: Exp; lines: +1 -0
in this i added the header file kernel.h
—————————-
revision 1.6
date: 2016/06/23 08:24:53; author: root; state: Exp; lines: +2 -3
no such change
—————————-
revision 1.5
date: 2016/06/23 04:50:58; author: root; state: Exp; lines: +3 -2
*** empty log message ***
—————————-
revision 1.4
date: 2016/06/21 11:19:05; author: root; state: Exp; lines: +6 -0
some of the header files for chracter drivr
—————————-
revision 1.3
date: 2016/06/18 05:42:36; author: root; state: Exp; lines: +5 -1
in this i use to initilise no. of devices
—————————-
revision 1.2
date: 2016/06/17 06:55:29; author: root; state: Exp; lines: +14 -0
in this there is a macro of Device name major no minor no and no. od nodes
—————————-
revision 1.1
date: 2016/06/16 05:39:49; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: create_scull.c,v
Working file: create_scull.c
head: 1.56
branch:
locks: strict
root: 1.56
access list:
symbolic names:
keyword substitution: kv
total revisions: 56; selected revisions: 56
description:
this is a scull creating file
—————————-
revision 1.56 locked by: root;
date: 2016/07/06 07:16:15; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.55
date: 2016/07/06 07:13:45; author: root; state: Exp; lines: +1 -1
debugging
—————————-
revision 1.54
date: 2016/07/05 11:41:42; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.53
date: 2016/07/05 11:36:38; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.52
date: 2016/07/05 11:36:00; author: root; state: Exp; lines: +2 -1
*** empty log message ***
—————————-
revision 1.51
date: 2016/07/05 11:30:00; author: root; state: Exp; lines: +5 -3
*** empty log message ***
—————————-
revision 1.50
date: 2016/07/05 11:23:14; author: root; state: Exp; lines: +9 -7
debugging
—————————-
revision 1.49
date: 2016/07/05 11:14:54; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.48
date: 2016/07/05 11:12:46; author: root; state: Exp; lines: +2 -2
*** empty log message ***
—————————-
revision 1.47
date: 2016/07/05 10:47:28; author: root; state: Exp; lines: +2 -2
this is the file after debugging.
—————————-
revision 1.46
date: 2016/07/05 08:23:16; author: root; state: Exp; lines: +1 -0
debugging
—————————-
revision 1.45
date: 2016/07/05 08:21:21; author: root; state: Exp; lines: +2 -2
debugging
—————————-
revision 1.44
date: 2016/07/05 07:54:03; author: root; state: Exp; lines: +2 -4
debugging
—————————-
revision 1.43
date: 2016/07/05 07:01:35; author: root; state: Exp; lines: +1 -1
debugging
—————————-
revision 1.42
date: 2016/07/05 06:58:36; author: root; state: Exp; lines: +1 -1
debugging
—————————-
revision 1.41
date: 2016/07/05 06:57:10; author: root; state: Exp; lines: +4 -1
debugging
—————————-
revision 1.40
date: 2016/07/05 06:53:16; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.39
date: 2016/07/05 06:52:35; author: root; state: Exp; lines: +1 -1
no such change
—————————-
revision 1.38
date: 2016/07/05 06:29:38; author: root; state: Exp; lines: +4 -3
changing the value of to which it pointing
—————————-
revision 1.37
date: 2016/07/04 23:18:31; author: root; state: Exp; lines: +2 -2
*** empty log message ***
—————————-
revision 1.36
date: 2016/07/04 23:16:11; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.35
date: 2016/07/04 23:13:34; author: root; state: Exp; lines: +3 -5
*** empty log message ***
—————————-
revision 1.34
date: 2016/07/04 23:10:02; author: root; state: Exp; lines: +4 -3
printing a statement for debugging
—————————-
revision 1.33
date: 2016/07/04 23:01:33; author: root; state: Exp; lines: +1 -0
no such change
—————————-
revision 1.32
date: 2016/07/04 22:41:35; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.31
date: 2016/07/04 22:21:46; author: root; state: Exp; lines: +2 -2
*** empty log message ***
—————————-
revision 1.30
date: 2016/07/04 22:15:55; author: root; state: Exp; lines: +22 -22
no such change .
—————————-
revision 1.29
date: 2016/06/30 11:13:12; author: root; state: Exp; lines: +2 -2
debugging
—————————-
revision 1.28
date: 2016/06/30 11:04:22; author: root; state: Exp; lines: +3 -1
printing the addresses
—————————-
revision 1.27
date: 2016/06/30 10:47:14; author: root; state: Exp; lines: +28 -4
added a memory segment for quantum.
—————————-
revision 1.26
date: 2016/06/30 09:19:10; author: root; state: Exp; lines: +3 -2
checking the value of first and last pointer
—————————-
revision 1.25
date: 2016/06/30 09:02:19; author: root; state: Exp; lines: +3 -3
removing or debugging
—————————-
revision 1.24
date: 2016/06/30 08:54:33; author: root; state: Exp; lines: +1 -1
debugging
—————————-
revision 1.23
date: 2016/06/30 08:49:27; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.22
date: 2016/06/30 08:06:13; author: root; state: Exp; lines: +3 -4
edited the commant
—————————-
revision 1.21
date: 2016/06/30 07:28:48; author: root; state: Exp; lines: +2 -2
printing noqs for error
—————————-
revision 1.20
date: 2016/06/30 03:59:13; author: root; state: Exp; lines: +4 -3
Debugging
—————————-
revision 1.19
date: 2016/06/28 11:53:42; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.18
date: 2016/06/28 11:52:39; author: root; state: Exp; lines: +1 -0
debugging
—————————-
revision 1.17
date: 2016/06/28 11:47:03; author: root; state: Exp; lines: +2 -1
debugging
—————————-
revision 1.16
date: 2016/06/28 11:43:48; author: root; state: Exp; lines: +7 -0
*** empty log message ***
—————————-
revision 1.15
date: 2016/06/28 11:38:49; author: root; state: Exp; lines: +3 -2
removing a error
—————————-
revision 1.14
date: 2016/06/28 11:09:33; author: root; state: Exp; lines: +2 -3
just changing the variable name
—————————-
revision 1.13
date: 2016/06/28 07:35:20; author: root; state: Exp; lines: +1 -1
removing one error of memset
—————————-
revision 1.12
date: 2016/06/28 07:34:22; author: root; state: Exp; lines: +1 -1
removed one error
—————————-
revision 1.11
date: 2016/06/28 07:33:22; author: root; state: Exp; lines: +1 -1
removing error
—————————-
revision 1.10
date: 2016/06/28 07:23:14; author: root; state: Exp; lines: +1 -1
only a error of semicolon which is use to remove by adding a semicolon
—————————-
revision 1.9
date: 2016/06/28 07:22:12; author: root; state: Exp; lines: +8 -3
in this i use to initilise the qset now
—————————-
revision 1.8
date: 2016/06/28 06:14:12; author: root; state: Exp; lines: +17 -4
in this i use to
—————————-
revision 1.7
date: 2016/06/27 12:21:20; author: root; state: Exp; lines: +1 -2
*** empty log message ***
—————————-
revision 1.6
date: 2016/06/27 12:19:50; author: root; state: Exp; lines: +2 -2
*** empty log message ***
—————————-
revision 1.5
date: 2016/06/27 12:17:27; author: root; state: Exp; lines: +1 -4
*** empty log message ***
—————————-
revision 1.4
date: 2016/06/27 12:02:15; author: root; state: Exp; lines: +1 -2
no such change
—————————-
revision 1.3
date: 2016/06/27 12:00:39; author: root; state: Exp; lines: +4 -0
printing a error statement
—————————-
revision 1.2
date: 2016/06/27 11:55:14; author: root; state: Exp; lines: +1 -1
removing error
—————————-
revision 1.1
date: 2016/06/27 11:46:46; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: dev_write.c,v
Working file: dev_write.c
head: 1.8
branch:
locks: strict
root: 1.8
access list:
symbolic names:
keyword substitution: kv
total revisions: 8; selected revisions: 8
description:
this is a write routine
—————————-
revision 1.8 locked by: root;
date: 2016/07/05 11:08:44; author: root; state: Exp; lines: +7 -6
removing the error .
—————————-
revision 1.7
date: 2016/07/05 10:48:05; author: root; state: Exp; lines: +22 -2
in this a copy_from_user function is decleared
—————————-
revision 1.6
date: 2016/07/04 20:47:30; author: root; state: Exp; lines: +1 -1
recorrecting the error
—————————-
revision 1.5
date: 2016/07/04 20:45:17; author: root; state: Exp; lines: +1 -1
returning the required bytes
—————————-
revision 1.4
date: 2016/06/27 11:51:22; author: root; state: Exp; lines: +3 -3
edited the errors
—————————-
revision 1.3
date: 2016/06/27 11:47:05; author: root; state: Exp; lines: +17 -0
here calling of create_scull and another variables
—————————-
revision 1.2
date: 2016/06/24 10:29:09; author: root; state: Exp; lines: +1 -1
declearing the type of write function
—————————-
revision 1.1
date: 2016/06/24 10:21:49; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: declaration.h,v
Working file: declaration.h
head: 1.12
branch:
locks: strict
root: 1.12
access list:
symbolic names:
keyword substitution: kv
total revisions: 12; selected revisions: 12
description:
in this there is a decleration of major no.
minorno.
and dev_id and also no. of nodes
—————————-
revision 1.12 locked by: root;
date: 2016/07/05 11:09:21; author: root; state: Exp; lines: +1 -1
no change
—————————-
revision 1.11
date: 2016/07/05 10:48:36; author: root; state: Exp; lines: +3 -1
decleration of datasize and devicesize
—————————-
revision 1.10
date: 2016/06/27 11:43:52; author: root; state: Exp; lines: +7 -5
declearation of quantumsize and qset
—————————-
revision 1.9
date: 2016/06/26 05:57:27; author: root; state: Exp; lines: +1 -1
‘
—————————-
revision 1.8
date: 2016/06/24 11:46:22; author: root; state: Exp; lines: +1 -0
*** empty log message ***
—————————-
revision 1.7
date: 2016/06/24 10:22:03; author: root; state: Exp; lines: +1 -0
declearing the dev_write function
—————————-
revision 1.6
date: 2016/06/24 06:08:50; author: root; state: Exp; lines: +1 -1
added a semicolon
—————————-
revision 1.5
date: 2016/06/24 05:41:08; author: root; state: Exp; lines: +1 -0
in this i decleared the prototype of dev_trim
—————————-
revision 1.4
date: 2016/06/23 04:50:17; author: root; state: Exp; lines: +1 -1
no such change
—————————-
revision 1.3
date: 2016/06/21 11:18:02; author: root; state: Exp; lines: +1 -0
some of the declaration i.e. open call func.
—————————-
revision 1.2
date: 2016/06/18 05:41:46; author: root; state: Exp; lines: +15 -1
in this i declare the dev and qset structure
—————————-
revision 1.1
date: 2016/06/17 06:54:11; author: root; state: Exp;
Initial revision
=============================================================================

Hello_kern_prog

Sanjay Singla — Sun, 17 Apr 2016 09:42:58 +0000

This is insert the data into the ram and print it.

Character-driver

Sanjay Singla — Wed, 06 Apr 2016 11:44:28 +0000

Character driver
—————————-
revision 1.38
date: 2016/03/11 05:46:49; author: root; state: Exp; lines: +0 -1
*** empty log message ***
—————————-
revision 1.37
date: 2016/03/10 09:52:22; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.36
date: 2016/03/10 09:49:21; author: root; state: Exp; lines: +5 -5
*** empty log message ***
—————————-
revision 1.35
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date: 2016/03/10 09:22:50; author: root; state: Exp; lines: +2 -0
We cross check the program.
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Call the memset().
Call the cdev_init().
Call the cdev_add().
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Declare the variable of dev inside it.
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date: 2016/03/10 08:56:32; author: root; state: Exp; lines: +7 -0
Malloc the memory for dev struct through kmalloc.
It takes two arguments frist type or bit o memory and 2nd is flag.
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date: 2016/03/10 06:03:04; author: root; state: Exp; lines: +2 -3
Delete the majorno and minorno variable and declare it into the macro.h
Delete the dev_t devid and declare it into the macro.h
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date: 2016/03/10 05:53:26; author: root; state: Exp; lines: +3 -1
Here declare the libraray #include”macro.h”.
We spacifie the macro inside the function.
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Pass the address.
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revision 1.15
date: 2016/03/09 10:23:00; author: root; state: Exp; lines: +1 -1
Here we use alloc_chrdev_region().
Now pass the argument where the minor no. startup and no. of devices.
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date: 2016/03/09 09:56:35; author: root; state: Exp; lines: +3 -4
Add the dev_t variable and inside the register_chrdev_region().
Print the majar no. and minor no.
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Add the argument which tell no. of devices.
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date: 2016/03/09 09:46:41; author: root; state: Exp; lines: +1 -1
Aplly condition to check the registeration through register_chrdev_region.
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date: 2016/03/09 09:42:29; author: root; state: Exp; lines: +3 -3
Decalre a integer variable which name is mano.(major no.).
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date: 2016/03/09 09:39:01; author: root; state: Exp; lines: +16 -3
Call the register_chrdev_region().
The frist argument is dev_t type in which major no. is save and 2nd argument strore the minor number.
3rd argument is name of driver i.e in which name you register your own driver in table.
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Add the termination condition.
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date: 2016/03/09 09:19:21; author: root; state: Exp; lines: +0 -2
Add the prototype file.
Define the struct file_operations.
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Here declare the mno.
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Register().
Frist arguments is major no..
So put in 0 for default case.
2nd arguments are driver name
3rd arguments are file operations.
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date: 2016/03/04 10:29:25; author: root; state: Exp;
Initial revision
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RCS file: macro.h,v
Working file: macro.h
head: 1.15
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Declare a new file.Here we define the macro.
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Remove the node macro.
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date: 2016/03/10 08:57:42; author: root; state: Exp; lines: +15 -0
define the variale of structure like devicesize,quantumsize,qsetsize,datasize.
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Here declare the minorno and majorno .
We also declare dev_t devid variable.
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RCS file: opendev.c,v
Working file: opendev.c
head: 1.44
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Here open the device.
release the device.
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date: 2016/03/26 05:58:03; author: root; state: Exp; lines: +0 -1
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date: 2016/03/16 05:05:43; author: root; state: Exp; lines: +1 -2
Here we remove one print statement and add some print text.
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revision 1.27
date: 2016/03/16 04:59:56; author: root; state: Exp; lines: +1 -1
There is not allow , inside printk like that printk(KERN_INFO, “g\n”); like this this create a error.
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revision 1.26
date: 2016/03/16 04:52:50; author: root; state: Exp; lines: +8 -11
Initially we put ldev = NULL.
We use ldev into container_of().
It return some value then these value save inside the file->private.data.
And make a conditon in which it always strore the last two bit same as because we know O_ACCMODE the value is three and its binaray no. is 11 we and with the flag value so it store same flag digit of frist two digit.
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date: 2016/03/14 11:42:29; author: root; state: Exp; lines: +1 -1
Define the struct dev *ldev.
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date: 2016/03/14 11:40:07; author: root; state: Exp; lines: +1 -3
Call the trimdev().
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date: 2016/03/14 11:37:59; author: root; state: Exp; lines: +3 -2
Add the macro.h header file.
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date: 2016/03/14 10:17:23; author: root; state: Exp; lines: +5 -1
And operataion perform.
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date: 2016/03/11 11:41:49; author: root; state: Exp; lines: +22 -2
Call the trim function which use to overwrite data.
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date: 2016/03/11 10:04:55; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: prototype.h,v
Working file: prototype.h
head: 1.16
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total revisions: 16; selected revisions: 16
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date: 2016/03/28 10:15:46; author: root; state: Exp; lines: +1 -0
Add the seekdev() return and prototype.
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date: 2016/03/21 10:56:47; author: root; state: Exp; lines: +21 -0
Remove the prototype here.
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date: 2016/03/11 11:50:42; author: root; state: Exp; lines: +1 -1
Defination of the trimdev().
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date: 2016/03/11 11:42:31; author: root; state: Exp; lines: +1 -0
Add the int trimdev().
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date: 2016/03/11 06:44:38; author: root; state: Exp; lines: +1 -1
Add the dev_t devno.
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date: 2016/03/10 09:16:24; author: root; state: Exp; lines: +1 -1
Add the pointer structre.
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date: 2016/03/10 09:03:33; author: root; state: Exp; lines: +1 -0
Add the variable of dev.\
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date: 2016/03/10 08:37:52; author: root; state: Exp; lines: +2 -0
Add the two variables.
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date: 2016/03/09 09:57:27; author: root; state: Exp; lines: +1 -1
Add the variable chrdev.
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date: 2016/03/09 09:44:25; author: root; state: Exp; lines: +1 -0
Add the extern file
Declare the major no. inside the prototype.h.
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revision 1.1
date: 2016/03/09 09:14:21; author: root; state: Exp;
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=============================================================================

RCS file: readdev.c,v
Working file: readdev.c
head: 1.179
branch:
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total revisions: 179; selected revisions: 179
description:
This is a readdev().
Here we start to read data.
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Multi-Tasking Operating System

Jyoti Singh — Sat, 26 Mar 2016 16:23:17 +0000

Multitasking OS is the one that can simultaneously interleave execution of more then one process.

They are of two types :
>>cooperative multitasking : in this process don’t stop running until it voluntary decide to do so . This is known as yielding.

>>Preemptive multitasking : in this scheduler decides when a process to cease running and a new process to begin running. This involuntary suspending of running program is called preemptive. This maintains that no process monopolize the resource.

character driver(Hello kernel)

Vishal Kumar — Wed, 16 Mar 2016 04:05:38 +0000

RCS file: exit_p.c,v
Working file: exit_p.c
head: 1.1
branch:
locks: strict
root: 1.1
access list:
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keyword substitution: kv
total revisions: 1; selected revisions: 1
description:
file contain init_exit module and function.
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revision 1.1 locked by: root;
date: 2016/03/10 17:09:14; author: root; state: Exp;
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=============================================================================

RCS file: header.h,v
Working file: header.h
head: 1.1
branch:
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keyword substitution: kv
total revisions: 1; selected revisions: 1
description:
this having all header files used in program.
init.h kernel.h module.h.
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revision 1.1
date: 2016/03/10 17:10:03; author: root; state: Exp;
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=============================================================================

RCS file: init_p.c,v
Working file: init_p.c
head: 1.1
branch:
locks: strict
root: 1.1
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total revisions: 1; selected revisions: 1
description:
file having module_init and its function.
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date: 2016/03/10 17:11:49; author: root; state: Exp;
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RCS file: header.h,v
Working file: header.h
head: 1.1
branch:
locks: strict
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keyword substitution: kv
total revisions: 1; selected revisions: 1
description:
this having all header files used in program.
init.h kernel.h module.h.
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RCS file: header.h,v
Working file: header.h
head: 1.2
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total revisions: 2; selected revisions: 2
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this having all header files used in program.
init.h kernel.h module.h.
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using the MODULE LICENSE AUTHOR & DESCRIPTION.
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=============================================================================

RCS file: init_p.c,v
Working file: init_p.c
head: 1.2
branch:
locks: strict
root: 1.2
access list:
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keyword substitution: kv
total revisions: 2; selected revisions: 2
description:
file having module_init and its function.
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date: 2016/03/10 17:11:49; author: root; state: Exp;
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=============================================================================

What is Character Driver?

Ankur Garg — Sun, 21 Feb 2016 12:10:16 +0000

A character device driver is one that transfers data directly to and from a user process.

This is the most common type of device driver and there are plenty of simple examples in the source tree.

Character device drivers may transfer data between a user-level process and the device using any scheme other than the system buffer cache.

Character drivers control devices such as :-

——————————————

* network cards

* terminal devices

* printers

* specialized devices such as robots

* medical devices

* retail sales devices.

Introduction to Block Driver

Jatin Mittal — Wed, 16 Dec 2015 11:49:17 +0000

Overview :

Block Drivers are act as conduit between core memory and secondary storage.
There is a virtual memory layer between core memory and secondary storage.
Block Layer could be seen as a part of virtual memory subsystem.
Block driver provides access to devices that transfer randomly accessible data.
Block Driver controls the block layer, makes decision about collecting bytes into group of bytes, handle interaction between virtual layer and block layer, block layer and block devices.
Block Driver collect chunks of bytes into blocks.
As almost every block device consist of file system also. Therefore block device driver must take care of file system.

character driver

Narendra Pal — Wed, 16 Dec 2015 07:05:43 +0000

Hi!

character driver

steps of character driver writing -

1->create structure for device

2->Allocate memory

3->Initialise device

4->Insert device using modprobe /insmod command

5->Release device

How to Write a Writer Routine.

Sanny Singh — Wed, 16 Dec 2015 06:51:16 +0000

In the char driver We write the Write Routine. This write routine is mapped in struct file operations . We use copy_from_user macro. this macro has three arguments. first is void* to second is const void* __user form and last argument is how many char have to write.

first malloc the sqset then malloc sqset->data and at last create qsetarray. Then malloc qsetarry member one by one and write the data by using copy_from_user macro.

Create the node, open it and open & release the devices

Sachin Jangid — Thu, 07 May 2015 08:24:09 +0000

RCS file: header.h,v
Working file: header.h
head: 1.14
branch:
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total revisions: 14; selected revisions: 14
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this is basic header file
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revision 1.14
date: 2015/05/07 07:48:45; author: root; state: Exp; lines: +1 -1
gave the prototype for scull_trim()
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date: 2015/05/07 07:47:51; author: root; state: Exp; lines: +1 -1
declare the prototype for open_dev & close_dev
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date: 2015/05/06 11:26:56; author: root; state: Exp; lines: +9 -0
*** empty log message ***
—————————-
revision 1.8
date: 2015/04/27 10:24:14; author: root; state: Exp; lines: +21 -0
declare marcos for quantum size, qset size, data size, device size
also declare these variables in struct Dev
—————————-
revision 1.7
date: 2015/04/24 13:43:07; author: root; state: Exp; lines: +1 -0
*** empty log message ***
—————————-
revision 1.6
date: 2015/04/24 13:38:51; author: root; state: Exp; lines: +1 -0
*** empty log message ***
—————————-
revision 1.5
date: 2015/04/24 13:32:14; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.4
date: 2015/04/24 12:55:42; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.3
date: 2015/04/24 12:52:22; author: root; state: Exp; lines: +14 -0
declare struct Qset, struct Dev
—————————-
revision 1.2
date: 2015/04/24 11:42:31; author: root; state: Exp; lines: +20 -1
included moduleparan.h & slab.h
—————————-
revision 1.1
date: 2015/04/24 05:20:37; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: file_operations.h,v
Working file: file_operations.h
head: 1.3
branch:
locks: strict
access list:
symbolic names:
keyword substitution: kv
total revisions: 3; selected revisions: 3
description:
this is basic header file for file operations
—————————-
revision 1.3
date: 2015/05/07 08:05:53; author: root; state: Exp; lines: +1 -1
map close_dev with release
—————————-
revision 1.2
date: 2015/05/07 08:04:10; author: root; state: Exp; lines: +1 -1
declare a structure struct file_operations
map open_dev with open
—————————-
revision 1.1
date: 2015/05/07 08:03:44; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: init.c,v
Working file: init.c
head: 1.12
branch:
locks: strict
access list:
symbolic names:
keyword substitution: kv
total revisions: 12; selected revisions: 12
description:
this is driver intialisation file
—————————-
revision 1.12
date: 2015/05/06 13:59:15; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.11
date: 2015/04/27 10:36:47; author: root; state: Exp; lines: +2 -2
*** empty log message ***
—————————-
revision 1.10
date: 2015/04/27 10:34:46; author: root; state: Exp; lines: +2 -1
*** empty log message ***
—————————-
revision 1.9
date: 2015/04/27 10:25:49; author: root; state: Exp; lines: +46 -17
for new device use register_chrdev_region()
intialize all device i.e. nod=20
add all device
—————————-
revision 1.8
date: 2015/04/24 13:40:59; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.7
date: 2015/04/24 13:32:16; author: root; state: Exp; lines: +6 -1
*** empty log message ***
—————————-
revision 1.6
date: 2015/04/24 12:52:59; author: root; state: Exp; lines: +11 -0
allocating memory using kmalloc()
—————————-
revision 1.5
date: 2015/04/24 11:58:00; author: root; state: Exp; lines: +1 -1
use module parameter using module_param()
—————————-
revision 1.4
date: 2015/04/24 11:43:06; author: root; state: Exp; lines: +14 -2
intialise driver using alloc_chrdev_region()
—————————-
revision 1.3
date: 2015/04/24 05:32:26; author: root; state: Exp; lines: +3 -3
register the driver
—————————-
revision 1.2
date: 2015/04/24 05:24:42; author: root; state: Exp; lines: +3 -3
intialize driver using __init func
—————————-
revision 1.1
date: 2015/04/24 05:20:49; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: clean.c,v
Working file: clean.c
head: 1.7
branch:
locks: strict
access list:
symbolic names:
keyword substitution: kv
total revisions: 7; selected revisions: 7
description:
this is driver cleanup file
—————————-
revision 1.7
date: 2015/04/27 10:27:17; author: root; state: Exp; lines: +8 -2
clean all devices
—————————-
revision 1.6
date: 2015/04/24 13:32:17; author: root; state: Exp; lines: +1 -0
*** empty log message ***
—————————-
revision 1.5
date: 2015/04/24 12:53:37; author: root; state: Exp; lines: +1 -0
free memory using kfree()
—————————-
revision 1.4
date: 2015/04/24 11:44:00; author: root; state: Exp; lines: +1 -1
unregister the driver using unregister_chrdev_region()
—————————-
revision 1.3
date: 2015/04/24 05:33:04; author: root; state: Exp; lines: +1 -1
unregister the driver
—————————-
revision 1.2
date: 2015/04/24 05:25:51; author: root; state: Exp; lines: +1 -1
cleanup the driver using __exit func
—————————-
revision 1.1
date: 2015/04/24 05:21:08; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: writer.c,v
Working file: writer.c
head: 1.2
branch:
locks: strict
access list:
symbolic names:
keyword substitution: kv
total revisions: 2; selected revisions: 2
description:
—————————-
revision 1.2
date: 2015/05/07 08:35:22; author: root; state: Exp; lines: +1 -1
this program deals with application
here we can open the node using open command to get the fd
—————————-
revision 1.1
date: 2015/05/06 11:27:09; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: open_dev.c,v
Working file: open_dev.c
head: 1.4
branch:
locks: strict
access list:
symbolic names:
keyword substitution: kv
total revisions: 4; selected revisions: 4
description:
—————————-
revision 1.4
date: 2015/05/07 08:26:22; author: root; state: Exp; lines: +0 -1
call a func scull_trim to flush the data from device
—————————-
revision 1.3
date: 2015/05/07 08:15:24; author: root; state: Exp; lines: +0 -1
this is the program for open the devices
points the scull_dev * to offset of 2nd device
—————————-
revision 1.2
date: 2015/05/06 13:59:16; author: root; state: Exp; lines: +7 -6
*** empty log message ***
—————————-
revision 1.1
date: 2015/05/06 11:27:13; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: close_dev.c,v
Working file: close_dev.c
head: 1.3
branch:
locks: strict
access list:
symbolic names:
keyword substitution: kv
total revisions: 3; selected revisions: 3
description:
—————————-
revision 1.3
date: 2015/05/07 07:51:41; author: root; state: Exp; lines: +1 -1
this is a simple program for closing the device
—————————-
revision 1.2
date: 2015/05/06 13:59:17; author: root; state: Exp; lines: +2 -2
*** empty log message ***
—————————-
revision 1.1
date: 2015/05/06 11:27:14; author: root; state: Exp;
Initial revision
=============================================================================

Add the 20 devices and initialise the user defined structure dev in b/w cdev_init and cdev_add

Shashank Arora — Mon, 27 Apr 2015 10:29:06 +0000

RCS file: header.h,v

Working file: header.h

head: 1.6

branch:

locks: strict

access list:

symbolic names:

keyword substitution: kv

total revisions: 6;	selected revisions: 6

description:

----------------------------

revision 1.6

date: 2015/04/28 15:54:10;  author: root; 
state: Exp;  lines: +16 -0

define the macro of user defined parameter such
as QUANTUM_SIZE, DATA_SIZE, QSET_SIZE, DEVICE_SIZE.set the default
values.

----------------------------

revision 1.5

date: 2015/04/26 15:51:54;  author: root; 
state: Exp;  lines: +1 -0

removed the struct of cdev.

----------------------------

revision 1.4

date: 2015/04/26 14:41:40;  author: root; 
state: Exp;  lines: +1 -1

introduced the stucture for mapping

stuct Qset, struct dev where our devices node
information is stored.

in struct dev struct cdev is declared
internally.

also declared the extern struct dev *sdev
pointer for mapping

----------------------------

revision 1.3

date: 2015/04/26 13:28:55;  author: root; 
state: Exp;  lines: +1 -0

*** empty log message ***

----------------------------

revision 1.2

date: 2015/04/26 13:18:47;  author: root; 
state: Exp;  lines: +3 -0

*** empty log message ***

----------------------------

revision 1.1

date: 2015/04/26 13:12:11;  author: root; 
state: Exp;

Initial revision

=============================================================================

RCS file: declaration.h,v

Working file: declaration.h

head: 1.7

branch:

locks: strict

access list:

symbolic names:

keyword substitution: kv

total revisions: 7;	selected revisions: 7

description:

----------------------------

revision 1.7

date: 2015/04/28 15:56:37;  author: root; 
state: Exp;  lines: +2 -6

declared the extern variable of Macros.

----------------------------

revision 1.6

date: 2015/04/28 12:55:36;  author: root; 
state: Exp;  lines: +1 -0

declared the extern ndev in this.

----------------------------

revision 1.5

date: 2015/04/26 17:35:00;  author: root; 
state: Exp;  lines: +1 -0

introduced extern file operations variable.

----------------------------

revision 1.4

date: 2015/04/26 15:52:20;  author: root; 
state: Exp;  lines: +2 -2

include the linux/cdev.h in header.h

----------------------------

revision 1.3

date: 2015/04/26 14:45:32;  author: root; 
state: Exp;  lines: +19 -0

*** empty log message ***

----------------------------

revision 1.2

date: 2015/04/26 13:18:47;  author: root; 
state: Exp;  lines: +1 -0

*** empty log message ***

----------------------------

revision 1.1

date: 2015/04/26 13:12:11;  author: root; 
state: Exp;

Initial revision

=============================================================================

RCS file: new_initialization.c,v

Working file: new_initialization.c

head: 1.13

branch:

locks: strict

access list:

symbolic names:

keyword substitution: kv

total revisions: 13;	selected revisions: 13

description:

----------------------------

revision 1.13

date: 2015/04/28 16:20:11;  author: root; 
state: Exp;  lines: +3 -1

same as previous version, just checking.

----------------------------

revision 1.12

date: 2015/04/28 15:33:55;  author: root; 
state: Exp;  lines: +37 -8

declared the init_dev_parameter() in which
initialise the MACRO quantum_size,qset_size,data_size,device_size.

after that, call first in initial_func() so that
it will be initalized again.

Now, access these parameters through struct dev
variable which should be initialised b/w cdev_init() and cdev_add().

----------------------------

revision 1.11

date: 2015/04/28 13:04:27;  author: root; 
state: Exp;  lines: +2 -1

add the macro MINOR(ndev) to retrive the minor
no.

----------------------------

revision 1.10

date: 2015/04/28 13:00:29;  author: root; 
state: Exp;  lines: +1 -1

change the arugment of MKDEV(). 2nd argument
will be loop index because we gave the minor no.

----------------------------

revision 1.9

date: 2015/04/28 12:51:10;  author: root; 
state: Exp;  lines: +26 -18

register the devices 20 in loop.

declared MKDEV in loop to conmbine the major and
minor value into single one.

change the cdev and add the 20 devices.

----------------------------

revision 1.8

date: 2015/04/26 17:23:35;  author: root; 
state: Exp;  lines: +16 -2

initialize cdev_init and pass the 1st arguement
which is address of cdev which is pointed by object of struct dev.

2nd arguement is address of file_operations.

after cdev_init also initialized owner field and
file_operations *ops field which is actually defined in cdev.h.

after initialization of cdev_init, we need to
make the connection by using cdev_add().

In cdev_add(),mentioned the address pointed by
dev to cdev, 2nd arguement is dev and 3rd one is no. of devices we
added which is nod.

successfully cdev_add() is done, the driver
initilization is complete.

----------------------------

revision 1.7

date: 2015/04/26 16:11:06;  author: root; 
state: Exp;  lines: +4 -3

add the if statement in kmalloc error checking.

----------------------------

revision 1.6

date: 2015/04/26 15:51:07;  author: root; 
state: Exp;  lines: +2 -1

correct the mistake done is kmalloc of FLAG.

----------------------------

revision 1.5

date: 2015/04/26 14:40:00;  author: root; 
state: Exp;  lines: +8 -0

declared kmalloc and provide space into the
kernel.

after that memset flushed the memory.

----------------------------

revision 1.4

date: 2015/04/26 13:30:58;  author: root; 
state: Exp;  lines: +1 -0

*** empty log message ***

----------------------------

revision 1.3

date: 2015/04/26 13:28:53;  author: root; 
state: Exp;  lines: +3 -1

*** empty log message ***

----------------------------

revision 1.2

date: 2015/04/26 13:18:42;  author: root; 
state: Exp;  lines: +1 -0

*** empty log message ***

----------------------------

revision 1.1

date: 2015/04/26 13:12:11;  author: root; 
state: Exp;

Initial revision

=============================================================================

RCS file: new_clean.c,v

Working file: new_clean.c

head: 1.7

branch:

locks: strict

access list:

symbolic names:

keyword substitution: kv

total revisions: 7;	selected revisions: 7

description:

----------------------------

revision 1.7

date: 2015/04/28 12:54:55;  author: root; 
state: Exp;  lines: +5 -1

cdev_del is in loop to delete the connection.

Register a new device using register_chrdev_region, and intialize & add all devices

Sachin Jangid — Mon, 27 Apr 2015 10:21:15 +0000

RCS file: header.h,v
Working file: header.h
head: 1.1
branch:
locks: strict
access list:
symbolic names:
keyword substitution: kv
total revisions: 1; selected revisions: 1
description:
this is basic header file
—————————-
revision 1.1
date: 2015/04/24 05:20:37; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: init.c,v
Working file: init.c
head: 1.3
branch:
locks: strict
access list:
symbolic names:
keyword substitution: kv
total revisions: 3; selected revisions: 3
description:
this is driver intialisation file
—————————-
revision 1.3
date: 2015/04/24 05:32:26; author: root; state: Exp; lines: +3 -3
register the driver
—————————-
revision 1.2
date: 2015/04/24 05:24:42; author: root; state: Exp; lines: +3 -3
intialize driver using __init func
—————————-
revision 1.1
date: 2015/04/24 05:20:49; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: clean.c,v
Working file: clean.c
head: 1.3
branch:
locks: strict
access list:
symbolic names:
keyword substitution: kv
total revisions: 3; selected revisions: 3
description:
this is driver cleanup file
—————————-
revision 1.3
date: 2015/04/24 05:33:04; author: root; state: Exp; lines: +1 -1
unregister the driver
—————————-
revision 1.2
date: 2015/04/24 05:25:51; author: root; state: Exp; lines: +1 -1
cleanup the driver using __exit func
—————————-
revision 1.1
date: 2015/04/24 05:21:08; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: header.h,v
Working file: header.h
head: 1.7
branch:
locks: strict
access list:
symbolic names:
keyword substitution: kv
total revisions: 7; selected revisions: 7
description:
this is basic header file
—————————-
revision 1.7
date: 2015/04/24 13:43:07; author: root; state: Exp; lines: +1 -0
*** empty log message ***
—————————-
revision 1.6
date: 2015/04/24 13:38:51; author: root; state: Exp; lines: +1 -0
*** empty log message ***
—————————-
revision 1.5
date: 2015/04/24 13:32:14; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.4
date: 2015/04/24 12:55:42; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.3
date: 2015/04/24 12:52:22; author: root; state: Exp; lines: +14 -0
declare struct Qset, struct Dev
—————————-
revision 1.2
date: 2015/04/24 11:42:31; author: root; state: Exp; lines: +20 -1
included moduleparan.h & slab.h
—————————-
revision 1.1
date: 2015/04/24 05:20:37; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: init.c,v
Working file: init.c
head: 1.8
branch:
locks: strict
access list:
symbolic names:
keyword substitution: kv
total revisions: 8; selected revisions: 8
description:
this is driver intialisation file
—————————-
revision 1.8
date: 2015/04/24 13:40:59; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.7
date: 2015/04/24 13:32:16; author: root; state: Exp; lines: +6 -1
*** empty log message ***
—————————-
revision 1.6
date: 2015/04/24 12:52:59; author: root; state: Exp; lines: +11 -0
allocating memory using kmalloc()
—————————-
revision 1.5
date: 2015/04/24 11:58:00; author: root; state: Exp; lines: +1 -1
use module parameter using module_param()
—————————-
revision 1.4
date: 2015/04/24 11:43:06; author: root; state: Exp; lines: +14 -2
intialise driver using alloc_chrdev_region()
—————————-
revision 1.3
date: 2015/04/24 05:32:26; author: root; state: Exp; lines: +3 -3
register the driver
—————————-
revision 1.2
date: 2015/04/24 05:24:42; author: root; state: Exp; lines: +3 -3
intialize driver using __init func
—————————-
revision 1.1
date: 2015/04/24 05:20:49; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: clean.c,v
Working file: clean.c
head: 1.6
branch:
locks: strict
access list:
symbolic names:
keyword substitution: kv
total revisions: 6; selected revisions: 6
description:
this is driver cleanup file
—————————-
revision 1.6
date: 2015/04/24 13:32:17; author: root; state: Exp; lines: +1 -0
*** empty log message ***
—————————-
revision 1.5
date: 2015/04/24 12:53:37; author: root; state: Exp; lines: +1 -0
free memory using kfree()
—————————-
revision 1.4
date: 2015/04/24 11:44:00; author: root; state: Exp; lines: +1 -1
unregister the driver using unregister_chrdev_region()
—————————-
revision 1.3
date: 2015/04/24 05:33:04; author: root; state: Exp; lines: +1 -1
unregister the driver
—————————-
revision 1.2
date: 2015/04/24 05:25:51; author: root; state: Exp; lines: +1 -1
cleanup the driver using __exit func
—————————-
revision 1.1
date: 2015/04/24 05:21:08; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: header.h,v
Working file: header.h
head: 1.8
branch:
locks: strict
access list:
symbolic names:
keyword substitution: kv
total revisions: 8; selected revisions: 8
description:
this is basic header file
—————————-
revision 1.8
date: 2015/04/27 10:24:14; author: root; state: Exp; lines: +21 -0
declare marcos for quantum size, qset size, data size, device size
also declare these variables in struct Dev
—————————-
revision 1.7
date: 2015/04/24 13:43:07; author: root; state: Exp; lines: +1 -0
*** empty log message ***
—————————-
revision 1.6
date: 2015/04/24 13:38:51; author: root; state: Exp; lines: +1 -0
*** empty log message ***
—————————-
revision 1.5
date: 2015/04/24 13:32:14; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.4
date: 2015/04/24 12:55:42; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.3
date: 2015/04/24 12:52:22; author: root; state: Exp; lines: +14 -0
declare struct Qset, struct Dev
—————————-
revision 1.2
date: 2015/04/24 11:42:31; author: root; state: Exp; lines: +20 -1
included moduleparan.h & slab.h
—————————-
revision 1.1
date: 2015/04/24 05:20:37; author: root; state: Exp;
Initial revision
=============================================================================

RCS file: init.c,v
Working file: init.c
head: 1.11
branch:
locks: strict
access list:
symbolic names:
keyword substitution: kv
total revisions: 11; selected revisions: 11
description:
this is driver intialisation file
—————————-
revision 1.11
date: 2015/04/27 10:36:47; author: root; state: Exp; lines: +2 -2
*** empty log message ***
—————————-
revision 1.10
date: 2015/04/27 10:34:46; author: root; state: Exp; lines: +2 -1
*** empty log message ***
—————————-
revision 1.9
date: 2015/04/27 10:25:49; author: root; state: Exp; lines: +46 -17
for new device use register_chrdev_region()
intialize all device i.e. nod=20
add all device
—————————-
revision 1.8
date: 2015/04/24 13:40:59; author: root; state: Exp; lines: +1 -1
*** empty log message ***
—————————-
revision 1.7
date: 2015/04/24 13:32:16; author: root; state: Exp; lines: +6 -1
*** empty log message ***
—————————-
revision 1.6
date: 2015/04/24 12:52:59; author: root; state: Exp; lines: +11 -0
allocating memory using kmalloc()
—————————-
revision 1.5
date: 2015/04/24 11:58:00; author: root; state: Exp; lines: +1 -1
use module parameter using module_param()
—————————-
revision 1.4
date: 2015/04/24 11:43:06; author: root; state: Exp; lines: +14 -2
intialise driver using alloc_chrdev_region()
—————————-
revision 1.3
date: 2015/04/24 05:32:26; author: root; state: Exp; lines: +3 -3
register the driver
—————————-
revision 1.2
date: 2015/04/24 05:24:42; author: root; state: Exp; lines: +3 -3
intialize driver using __init func
—————————-
revision 1.1
date: 2015/04/24 05:20:49; author: root; state: Exp;
Initial revision
=============================================================================

Initialization, registeration of device driver by using cdev_add() and remove the connection successfully

Shashank Arora — Sat, 25 Apr 2015 12:40:47 +0000

RCS file: header.h,v

Working file: header.h

head: 1.5

branch:

locks: strict

access list:

symbolic names:

keyword substitution: kv

total revisions: 5;	selected revisions: 5

description:

----------------------------

revision 1.5

date: 2015/04/26 15:51:54;  author: root; 
state: Exp;  lines: +1 -0

removed the struct of cdev.

----------------------------

revision 1.4

date: 2015/04/26 14:41:40;  author: root; 
state: Exp;  lines: +1 -1

introduced the stucture for mapping

stuct Qset, struct dev where our devices node
information is stored.

in struct dev struct cdev is declared
internally.

also declared the extern struct dev *sdev
pointer for mapping

----------------------------

revision 1.3

date: 2015/04/26 13:28:55;  author: root; 
state: Exp;  lines: +1 -0

*** empty log message ***

----------------------------

revision 1.2

date: 2015/04/26 13:18:47;  author: root; 
state: Exp;  lines: +3 -0

*** empty log message ***

----------------------------

revision 1.1

date: 2015/04/26 13:12:11;  author: root; 
state: Exp;

Initial revision

=============================================================================

RCS file: declaration.h,v

Working file: declaration.h

head: 1.5

branch:

locks: strict

access list:

symbolic names:

keyword substitution: kv

total revisions: 5;	selected revisions: 5

description:

----------------------------

revision 1.5

date: 2015/04/26 17:35:00;  author: root; 
state: Exp;  lines: +1 -0

introduced extern file operations variable.

----------------------------

revision 1.4

date: 2015/04/26 15:52:20;  author: root; 
state: Exp;  lines: +2 -2

include the linux/cdev.h in header.h

----------------------------

revision 1.3

date: 2015/04/26 14:45:32;  author: root; 
state: Exp;  lines: +19 -0

*** empty log message ***

----------------------------

revision 1.2

date: 2015/04/26 13:18:47;  author: root; 
state: Exp;  lines: +1 -0

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revision 1.1

date: 2015/04/26 13:12:11;  author: root; 
state: Exp;

Initial revision

=============================================================================

RCS file: new_initialization.c,v

Working file: new_initialization.c

head: 1.8

branch:

locks: strict

access list:

symbolic names:

keyword substitution: kv

total revisions: 8;	selected revisions: 8

description:

----------------------------

revision 1.8

date: 2015/04/26 17:23:35;  author: root; 
state: Exp;  lines: +16 -2

initialize cdev_init and pass the 1st arguement
which is address of cdev which is pointed by object of struct dev.

2nd arguement is address of file_operations.

after cdev_init also initialized owner field and
file_operations *ops field which is actually defined in cdev.h.

after initialization of cdev_init, we need to
make the connection by using cdev_add().

In cdev_add(),mentioned the address pointed by
dev to cdev, 2nd arguement is dev and 3rd one is no. of devices we
added which is nod.

successfully cdev_add() is done, the driver
initilization is complete.

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revision 1.7

date: 2015/04/26 16:11:06;  author: root; 
state: Exp;  lines: +4 -3

add the if statement in kmalloc error checking.

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revision 1.6

date: 2015/04/26 15:51:07;  author: root; 
state: Exp;  lines: +2 -1

correct the mistake done is kmalloc of FLAG.

----------------------------

revision 1.5

date: 2015/04/26 14:40:00;  author: root; 
state: Exp;  lines: +8 -0

declared kmalloc and provide space into the
kernel.

after that memset flushed the memory.

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revision 1.4

date: 2015/04/26 13:30:58;  author: root; 
state: Exp;  lines: +1 -0

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revision 1.3

date: 2015/04/26 13:28:53;  author: root; 
state: Exp;  lines: +3 -1

*** empty log message ***

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revision 1.2

date: 2015/04/26 13:18:42;  author: root; 
state: Exp;  lines: +1 -0

*** empty log message ***

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revision 1.1

date: 2015/04/26 13:12:11;  author: root; 
state: Exp;

Initial revision

=============================================================================

RCS file: new_clean.c,v

Working file: new_clean.c

head: 1.6

branch:

locks: strict

access list:

symbolic names:

keyword substitution: kv

total revisions: 6;	selected revisions: 6

description:

----------------------------

revision 1.6

date: 2015/04/26 17:33:01;  author: root; 
state: Exp;  lines: +1 -1

The device represented stucture cdev must be
removed from the device table by using cdev_del by giving the
arguement which is address pointed dev to cdev.

----------------------------

revision 1.5

date: 2015/04/26 15:37:52;  author: root; 
state: Exp;  lines: +1 -1

change the kfree arguement i.e address of struct
dev.

----------------------------

revision 1.4

date: 2015/04/26 14:41:00;  author: root; 
state: Exp;  lines: +1 -0

kfree() is used before unregistered the driver.

----------------------------

revision 1.3

date: 2015/04/26 13:28:55;  author: root; 
state: Exp;  lines: +1 -1

*** empty log message ***

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revision 1.2

date: 2015/04/26 13:18:44;  author: root; 
state: Exp;  lines: +1 -0

*** empty log message ***

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revision 1.1

date: 2015/04/26 13:12:11;  author: root; 
state: Exp;

Initial revision

=============================================================================

Insert the driver into the kernel and remove the driver from kernel

Vishal Chopra — Sat, 25 Apr 2015 11:24:58 +0000

RCS file: init.c,v
Working file: init.c
head: 1.6
branch:
locks: strict
emblogic: 1.6
access list:
symbolic names:
keyword substitution: kv
total revisions: 6; selected revisions: 6
description:
Print a statement in the kernel
Register in the kernel.
—————————-
revision 1.6 locked by: emblogic;
date: 2015/04/25 11:05:53; author: emblogic; state: Exp; lines: +13 -0
*** empty log message ***
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revision 1.5
date: 2015/04/25 10:24:58; author: emblogic; state: Exp; lines: +12 -1
Memory is allocated in the kernel by using kmalloc.
cdev is initalize by using cdev_init.
after initialization its value is added.
—————————-
revision 1.4
date: 2015/04/25 07:45:30; author: emblogic; state: Exp; lines: +31 -7
Register the module in the kernel by using aloc_chardev_region.
Also input the value of the nod from the user.
—————————-
revision 1.3
date: 2015/04/24 12:33:08; author: emblogic; state: Exp; lines: +1 -1
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revision 1.2
date: 2015/04/24 12:21:54; author: emblogic; state: Exp; lines: +2 -2
*** empty log message ***
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revision 1.1
date: 2015/04/24 11:40:51; author: emblogic; state: Exp;
Initial revision
=============================================================================

RCS file: clean.c,v
Working file: clean.c
head: 1.4
branch:
locks: strict
emblogic: 1.4
access list:
symbolic names:
keyword substitution: kv
total revisions: 4; selected revisions: 4
description:
Include the file_operation structure.
—————————-
revision 1.4 locked by: emblogic;
date: 2015/04/25 11:05:56; author: emblogic; state: Exp; lines: +1 -1
*** empty log message ***
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revision 1.3
date: 2015/04/25 10:33:10; author: emblogic; state: Exp; lines: +3 -0
Cleaning process is reverse of the initalization.
first cdev struct is remove from the device table.
—————————-
revision 1.2
date: 2015/04/25 07:51:20; author: emblogic; state: Exp; lines: +12 -4
Unregister the module from the kernel.
—————————-
revision 1.1
date: 2015/04/24 11:41:38; author: emblogic; state: Exp;
Initial revision
=============================================================================