[ACL] config acl update incremental deletes all the existing rules and then adds new rules. Need provision to add/delete single rule.

[ArthiGovindaraj]

Description

After creating ACL table, we are loading the rules using "config acl update full/incremental ". But, there is no provision to add or delete a single rule using CLICK commands.

It would be helpful to support commands like
config acl add rule <filename.json>
config acl delete rule

Also, config acl delete table does not clear the config_db rules. "show acl rules" will still continue displaying the rules.

Steps to reproduce the issue

1. Create L3 ACL table => config acl add table -s ingress -p Ethernet0 L3_TABLE L3
2. Update rule RULE_5 from acl_1.json => config acl update full acl_1.json

root@sonic:~# show acl rule
Table     Rule          Priority    Action    Match
--------  ------------  ----------  --------  -------------------
L3_TABLE  RULE_5        9995        FORWARD   DST_IP: 30.0.0.2/32
                                              ETHER_TYPE: 2048
                                              L4_DST_PORT: 4657
                                              L4_SRC_PORT: 4656
                                              SRC_IP: 20.0.0.2/32
L3_TABLE  DEFAULT_RULE  1           DROP      ETHER_TYPE: 2048

4. Update rule RULE_6 from acl_2.json => RULE_5 is deleted and only RULE_6 exists. =========> ISSUE

root@sonic:~# show acl rule
Table     Rule          Priority    Action    Match
--------  ------------  ----------  --------  -------------------
L3_TABLE  RULE_6        9994        FORWARD   DST_IP: 30.0.0.3/32
                                              ETHER_TYPE: 2048
                                              L4_DST_PORT: 4659
                                              L4_SRC_PORT: 4658
                                              SRC_IP: 20.0.0.3/32
L3_TABLE  DEFAULT_RULE  1           DROP      ETHER_TYPE: 2048

5. Delete the table using "config acl remove table L3_TABLE" , still "show acl rule" is not cleared =====> ISSUE

root@sonic:~# config acl remove table L3_TABLE
root@sonic:~# show acl table
Name    Type    Binding    Description    Stage
------  ------  ---------  -------------  -------
root@sonic:~# show acl rule
Table     Rule          Priority    Action    Match
--------  ------------  ----------  --------  -------------------
L3_TABLE  RULE_6        9994        FORWARD   DST_IP: 30.0.0.3/32
                                              ETHER_TYPE: 2048
                                              L4_DST_PORT: 4659
                                              L4_SRC_PORT: 4658
                                              SRC_IP: 20.0.0.3/32
L3_TABLE  DEFAULT_RULE  1           DROP      ETHER_TYPE: 2048

Describe the results you received

• Using "config acl update" command all the existing rules in the table are getting deleted and there is no provision to add or delete a single rule.
• When doing "config acl remove table " rules should also be deleted

Describe the results you expected

Need provision to add or delete single rule.

1. Create L3 table

root@sonic:~# config acl add table -s ingress -p Ethernet0 L3_TABLE L3
root@sonic:~# show acl table
Name      Type    Binding    Description    Stage
--------  ------  ---------  -------------  -------
L3_TABLE  L3      Ethernet0  L3_TABLE       ingress

2. Update RULE_5 using acl_1.json

root@sonic:~# config acl update full acl_1.json
root@sonic:~# show acl rule
Table     Rule          Priority    Action    Match
--------  ------------  ----------  --------  -------------------
L3_TABLE  RULE_5        9995        FORWARD   DST_IP: 30.0.0.2/32
                                              ETHER_TYPE: 2048
                                              L4_DST_PORT: 4657
                                              L4_SRC_PORT: 4656
                                              SRC_IP: 20.0.0.2/32
L3_TABLE  DEFAULT_RULE  1           DROP      ETHER_TYPE: 2048

4. Update RULE_6 using acl_2.json

root@sonic:~# config acl add rule acl_2.json
root@sonic:~# show acl rule
Table     Rule          Priority    Action    Match
--------  ------------  ----------  --------  -------------------
L3_TABLE  RULE_5        9995        FORWARD   DST_IP: 30.0.0.2/32
                                              ETHER_TYPE: 2048
                                              L4_DST_PORT: 4657
                                              L4_SRC_PORT: 4656
                                              SRC_IP: 20.0.0.2/32
L3_TABLE  RULE_6        9994        FORWARD   DST_IP: 30.0.0.3/32
                                              ETHER_TYPE: 2048
                                              L4_DST_PORT: 4659
                                              L4_SRC_PORT: 4658
                                              SRC_IP: 20.0.0.3/32
L3_TABLE  DEFAULT_RULE  1           DROP      ETHER_TYPE: 2048

5. Delete the entire table and rules using "config acl remove table L3_TABLE"

root@sonic:~# config acl remove table L3_TABLE
root@sonic:~# show acl table
Name    Type    Binding    Description    Stage
------  ------  ---------  -------------  -------
root@sonic:~# show acl rule
Table    Rule    Priority    Action    Match
-------  ------  ----------  --------  -------

Additional information you deem important (e.g. issue happens only occasionally)

Suggested fix is provided in #2523

Output of show version

Same behavior in Branch : 202205/master

[ArthiGovindaraj]

Suggested fix provided in pull request #2523