Patch from Smadar Gonen <smadar.gn@gmail.com>

Implements some useful scst_user statistic in /proc

git-svn-id: https://scst.svn.sourceforge.net/svnroot/scst/trunk@967 d57e44dd-8a1f-0410-8b47-8ef2f437770f

diff --git a/scst/src/dev_handlers/scst_user.c b/scst/src/dev_handlers/scst_user.c
index c39d9c2..82e9cf9 100644 (file)
--- a/scst/src/dev_handlers/scst_user.c
+++ b/scst/src/dev_handlers/scst_user.c
@@ -178,6 +178,8 @@ static unsigned int dev_user_poll(struct file *filp, poll_table *wait);
 static long dev_user_ioctl(struct file *file, unsigned int cmd,
        unsigned long arg);
 static int dev_user_release(struct inode *inode, struct file *file);
+static int dev_user_read_proc(struct seq_file *seq,
+       struct scst_dev_type *dev_type);
 
 /** Data **/
 
@@ -3056,6 +3058,7 @@ static int dev_usr_parse(struct scst_cmd *cmd)
        .name =         DEV_USER_NAME,  \
        .type =         -1,             \
        .parse =        dev_usr_parse,  \
+        .read_proc =    dev_user_read_proc, \
 }
 
 static struct scst_dev_type dev_user_devtype = USR_TYPE;
@@ -3185,6 +3188,46 @@ out:
        return res;
 }
 
+
+/*
+ * Called when a file in the /proc/scsi_tgt/scst_user is read
+ */
+static int dev_user_read_proc(struct seq_file *seq, struct scst_dev_type *dev_type)
+{
+       int res = 0;
+       struct scst_user_dev *dev;
+       unsigned long flags;
+
+       TRACE_ENTRY();
+
+       spin_lock(&dev_list_lock);
+
+       list_for_each_entry(dev, &dev_list, dev_list_entry) {
+               int i;
+               seq_printf(seq, "Device %s commands:\n", dev->name);
+               spin_lock_irqsave(&dev->cmd_lists.cmd_list_lock, flags);
+               for (i = 0; i < (int)ARRAY_SIZE(dev->ucmd_hash); i++) {
+                       struct list_head *head = &dev->ucmd_hash[i];
+                       struct scst_user_cmd *ucmd;
+                       list_for_each_entry(ucmd, head, hash_list_entry) {
+                               seq_printf(seq, "ucmd %p (state %x, ref %d), "
+                                       "sent_to_user %d, seen_by_user %d, "
+                                       "aborted %d, jammed %d, scst_cmd %p\n",
+                                       ucmd, ucmd->state,
+                                       atomic_read(&ucmd->ucmd_ref),
+                                       ucmd->sent_to_user, ucmd->seen_by_user,
+                                       ucmd->aborted, ucmd->jammed, ucmd->cmd);
+                               
+                       }
+               }
+               spin_unlock_irqrestore(&dev->cmd_lists.cmd_list_lock, flags);
+       }
+       spin_unlock(&dev_list_lock);
+
+       TRACE_EXIT_RES(res);
+       return res;
+}
+
 static inline int test_cleanup_list(void)
 {
        int res = !list_empty(&cleanup_list) ||