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This patch merges Yufei Ren <yufei.ren@stonybrook.edu> patch
with comments from the list plus what I think is a bug in the
addr_len usage.
For the addr_len use, it looks like we were using that as the
arg to memcpy, but that value included the length of the pathname
string and also the offset of sun_path in the sockaddr_un and so
that is too long.
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Leading-login only takes effect when performing "login-by-startup" (ie,
iscsiadm -m node -L ...). For any nodes with the new
'node.leading_login' config value set to "Yes" (The default is "No"), a
login attempt will be made on each successive iface record until one
succeeds.
The intent is to only have a single iSCSI session for each configured
target at startup but also allow for fallthrough to alternate ifaces in
case of network issues.
Signed-off-by: Jim Ramsay <jim_ramsay@dell.com>
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If a record has this set to anything other than the default value of 1,
performing a login with this record will ensure that at least that
number of sessions are present for that recordr: The code counts the
number of sessions currently active for this record, and will perform
multiple logins if the count is less than nr_sessions.
Signed-off-by: Jim Ramsay <jim_ramsay@dell.com>
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This is populated by iscsiadm in 'session' mode when the '-r' options is
given, and passed along in the session_rec_t. It limits the operation
of exec_node_op to only the specific session specified by the user.
This is a prerequisite for "multiple sessions per iface recond".
Signed-off-by: Jim Ramsay <jim_ramsay@dell.com>
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This replaces the native isns code with open-isns's libisns.
I included the open-isns code in the open-iscsi tarball
to make distribution easier since some distros use different
isns clients and may not want to carry open-isns.
This is based on open-isns commit
5e09f36d3446e41de0b8361601ffec4cd140d513.
Changes in iSNS behavior/use:
- To do discovery you must pass the ip and optionally the
port to iscsiadm:
iscsiadm -m discovery -t st -p 10.15.0.9
This command accepts the same ops as sendtargets so you can
add/remove/update the node records that are created.
It also supports ifaces properly now.
- isns.address and isns.port in iscsid.conf are no longer
used.
- ESI is temporarily not supported. This will be fixed in the
next patch when SCNs support is added.
- The iscsiadm isns discovery command is not marked as stable.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
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