From e89d15eeadb172bd53ca6362bf9ab6b22077224c Mon Sep 17 00:00:00 2001 From: Nicholas Bellinger Date: Wed, 9 Feb 2011 15:35:03 -0800 Subject: [SCSI] target: Remove procfs based target_core_mib.c code This patch removes the legacy procfs based target_core_mib.c code, and moves the necessary scsi_index_tables functions and defines into target_core_transport.c and target_core_base.h code to allow existing fabric independent statistics to function. This includes the removal of a handful of 'atomic_t mib_ref_count' counters used in struct se_node_acl, se_session and se_hba to prevent removal while using seq_list procfs walking logic. [jejb: fix up compile failures] Signed-off-by: Nicholas A. Bellinger Signed-off-by: James Bottomley --- drivers/target/target_core_transport.c | 42 +++++++++++++++++++++++++++------- 1 file changed, 34 insertions(+), 8 deletions(-) (limited to 'drivers/target/target_core_transport.c') diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 32dc5163b5a0..236e22d8cfae 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -379,6 +379,40 @@ void release_se_global(void) se_global = NULL; } +/* SCSI statistics table index */ +static struct scsi_index_table scsi_index_table; + +/* + * Initialize the index table for allocating unique row indexes to various mib + * tables. + */ +void init_scsi_index_table(void) +{ + memset(&scsi_index_table, 0, sizeof(struct scsi_index_table)); + spin_lock_init(&scsi_index_table.lock); +} + +/* + * Allocate a new row index for the entry type specified + */ +u32 scsi_get_new_index(scsi_index_t type) +{ + u32 new_index; + + if ((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)) { + printk(KERN_ERR "Invalid index type %d\n", type); + return -EINVAL; + } + + spin_lock(&scsi_index_table.lock); + new_index = ++scsi_index_table.scsi_mib_index[type]; + if (new_index == 0) + new_index = ++scsi_index_table.scsi_mib_index[type]; + spin_unlock(&scsi_index_table.lock); + + return new_index; +} + void transport_init_queue_obj(struct se_queue_obj *qobj) { atomic_set(&qobj->queue_cnt, 0); @@ -437,7 +471,6 @@ struct se_session *transport_init_session(void) } INIT_LIST_HEAD(&se_sess->sess_list); INIT_LIST_HEAD(&se_sess->sess_acl_list); - atomic_set(&se_sess->mib_ref_count, 0); return se_sess; } @@ -546,12 +579,6 @@ void transport_deregister_session(struct se_session *se_sess) transport_free_session(se_sess); return; } - /* - * Wait for possible reference in drivers/target/target_core_mib.c: - * scsi_att_intr_port_seq_show() - */ - while (atomic_read(&se_sess->mib_ref_count) != 0) - cpu_relax(); spin_lock_bh(&se_tpg->session_lock); list_del(&se_sess->sess_list); @@ -574,7 +601,6 @@ void transport_deregister_session(struct se_session *se_sess) spin_unlock_bh(&se_tpg->acl_node_lock); core_tpg_wait_for_nacl_pr_ref(se_nacl); - core_tpg_wait_for_mib_ref(se_nacl); core_free_device_list_for_node(se_nacl, se_tpg); TPG_TFO(se_tpg)->tpg_release_fabric_acl(se_tpg, se_nacl); -- cgit