RCS file: ./readf.c,v
Working file: ./readf.c
head: 1.19
branch:
locks: strict
root: 1.19
access list:
symbolic names:
keyword substitution: kv
total revisions: 19; selected revisions: 19
description:
chardev_read() function reside here which is responsible for performing the read operation.
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revision 1.19 locked by: root;
date: 2014/03/25 19:27:06; author: root; state: Exp; lines: +3 -0
up_read() is used to release the semaphore for reading.
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revision 1.18
date: 2014/03/05 08:19:18; author: root; state: Exp; lines: +1 -1
Modified
the return value of the chardev_read() function to nocsr.This return
value becomes the return type of the read() system call in the
application.
Status : Read operation in multiple qset arrays is implemented successfully.
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revision 1.17
date: 2014/03/05 08:13:05; author: root; state: Exp; lines: +1 -1
Changed quantum_size to qset_size inside the loop.
Checking……..
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revision 1.16
date: 2014/03/05 08:10:38; author: root; state: Exp; lines: +13 -3
Declared
a variable j to keep track on how many quantums read operation is
already performed.When it is equal to the number of quantums then break.
Also a condition is included in which the variable i is set to 0 and lscullqset is updated when the i equals qset_size.
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revision 1.15
date: 2014/03/05 08:06:46; author: root; state: Exp; lines: +2 -1
Declared a local pointer variable to point to a structure of type struct Scullqset.
Extending the code further so that read can be performed in multiple qset arrays.
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revision 1.14
date: 2014/03/04 22:36:51; author: root; state: Exp; lines: +3 -2
Status : Read operation from multiple quantums is implemented successfully.
All logical errors are fixed.
To calculate the number of
characters to read size argument is used instead of the data_size to
ensure that always the size number of bytes.
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revision 1.13
date: 2014/03/04 22:29:49; author: root; state: Exp; lines: +1 -0
Logical mistake,the number of characters successfully read was not updated.
Fixed the bug.
Checking…………
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revision 1.12
date: 2014/03/04 22:15:25; author: root; state: Exp; lines: +21 -3
Implemented the logic for copy_to_user() function for the multiple quantums.
After reading the entire data from quantums,it is stored inside rbuff pointer.
Checking……
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revision 1.11
date: 2014/03/04 21:02:53; author: root; state: Exp; lines: +8 -1
Calculated the required number of quantums based on the data size.
After calculating the number of quantums the number of quantums are printed.
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revision 1.10
date: 2014/03/04 20:57:26; author: root; state: Exp; lines: +1 -1
Bug fixed.
Issue : Incorrect spelling of noqsa.
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revision 1.9
date: 2014/03/04 20:54:34; author: root; state: Exp; lines: +8 -0
Added the logic to find out the number of qset arrays that are required using the data_size.
After calculating the number of qset arrays are printed.
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revision 1.8
date: 2014/03/04 20:49:58; author: root; state: Exp; lines: +16 -2
Logic to find the number of scullqset required is added.The total number of scullqsets will depend on the data_size.
After calculating the number of scullqsets required,the number of scullqsets are printed using printk() statements.
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revision 1.7
date: 2014/03/04 20:15:29; author: root; state: Exp; lines: +2 -0
Another variable is added using extern called data_size which actually stores how much data is written to the quantums.
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revision 1.6
date: 2014/03/04 20:14:01; author: root; state: Exp; lines: +4 -0
Three variables are added namely:quantum_size , qset_size and device_size using extern.
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revision 1.5
date: 2014/03/04 20:11:21; author: root; state: Exp; lines: +8 -0
Declared
two variables i and noq.The variable is used to run the loop and the
variable noq is used to store the number of quantums.
Calculating the number of quantums….
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revision 1.4
date: 2014/03/04 20:08:36; author: root; state: Exp; lines: +2 -0
Declared a pointer to a structure of type struct Sculldev,inside which the filep->private_data is stored.
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revision 1.3
date: 2014/03/04 20:04:39; author: root; state: Exp; lines: +8 -1
Gave two printk() statements to mark the beginning and end of the chardev_read() function.
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revision 1.2
date: 2014/03/04 20:02:14; author: root; state: Exp; lines: +8 -0
The prototype of the chardev_read() function is added here using extern.
Defining the body of the chardev_read() function…..
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revision 1.1
date: 2014/03/04 19:30:01; author: root; state: Exp;
Initial revision
=============================================================================
RCS file: ./writef.c,v
Working file: ./writef.c
head: 1.39
branch:
locks: strict
root: 1.39
access list:
symbolic names:
keyword substitution: kv
total revisions: 39; selected revisions: 39
description:
chardev_write() function reside here.
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revision 1.39 locked by: root;
date: 2014/03/25 19:27:45; author: root; state: Exp; lines: +1 -1
up_write() function is used to release the semaphore for writing.
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revision 1.38
date: 2014/03/07 19:15:16; author: root; state: Exp; lines: +9 -1
Semaphore is released at the end of the write operation using up() function so that readers can now perform the read operations.
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revision 1.37
date: 2014/03/04 18:55:04; author: root; state: Exp; lines: +0 -21
Status : Writing in multiple qsets is successfully implemented.
Issue:The data pointer to the qset array was updated to point to the
last qset array.Because of this reason the crash is taking place.
Bug fixed.
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revision 1.36
date: 2014/03/04 18:43:52; author: root; state: Exp; lines: +18 -4
Input/output crash is taking place.
Debugging…..
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revision 1.35
date: 2014/03/04 07:36:31; author: root; state: Exp; lines: +3 -1
Logical error fixed.
Issue : flag variable is not set to 1 due to which it is not able to link the scullqsets.
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revision 1.34
date: 2014/03/04 07:21:30; author: root; state: Exp; lines: +7 -2
Declared a count variable inside create_scullqset() function too to make sure that exactly how many scullqsets are created.
The
number of scullqsets are properly created inside the create_scullqset()
function,but inside the chardev_write() it is showing 1 only same is
the case with qset_arrays.
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