From e6d60ef292bea87ef647235a3bc7a3214e7fa2ca Mon Sep 17 00:00:00 2001
From: 0xFEEDC0DE64 <daniel@brunner.ninja>
Date: Sat, 24 Jan 2026 15:52:22 +0100
Subject: [PATCH] Add compression, btree_usage, reconcile and options

---
 bcachefs.sh | 124 ++++++++++++++++++++++++++++++++++++++++------------
 1 file changed, 97 insertions(+), 27 deletions(-)

diff --git a/bcachefs.sh b/bcachefs.sh
index db00bd8..9ad8c43 100644
--- a/bcachefs.sh
+++ b/bcachefs.sh
@@ -18,40 +18,43 @@ function convert_to_bytes() {
     }' <<< "$1"
 }
 
+function ensure_comma() {
+    if [[ $FIRST -eq 1 ]]
+    then
+        FIRST=
+    else
+        echo -n ,
+    fi
+}
 
 FSPATH="/mnt"
 
-UUID=
-
 PARSER_STATE=0
-#echo switch to 0
 while IFS= read -r line; do
     case $PARSER_STATE in
     0)
         if [[ $line =~ ^Filesystem:[[:space:]]+([^[:space:]]+)$ ]]
         then
             uuid="${BASH_REMATCH[1]}"
-#            echo "uuid=$UUID"
         elif [[ $line == Data\ type* ]]
         then
-            #echo switch to 1
             PARSER_STATE=1
-            #continue
         elif [[ $line == "Compression:" ]]
         then
-            #echo switch to 2
+            echo -n "bcachefs_compression,fspath=\"$FSPATH\",uuid=\"$uuid\" "
+            FIRST=1
             PARSER_STATE=2
-            #continue
         elif [[ $line == "Btree usage:" ]]
         then
-            #echo switch to 3
+            echo -n "bcachefs_btree_usage,fspath=\"$FSPATH\",uuid=\"$uuid\" "
+            FIRST=1
             PARSER_STATE=3
-            #continue
-        elif [[ $line == "Pending reconcile:" ]]
+        elif [[ $line =~ ^Pending\ reconcile: ]]
         then
-            #echo switch to 4
+            echo -n "bcachefs_reconcile,fspath=\"$FSPATH\",uuid=\"$uuid\" "
+            FIRST=1
             PARSER_STATE=4
-            #continue
+            REMAINING=(replicas checksum erasure_code compression target high_priority pending)
         elif [[ $line =~ ^([^ ]+)\ \(device\ ([0-9]+)\):[[:space:]]+([^[:space:]]+)[[:space:]]+([^[:space:]]+)[[:space:]]+([0-9]+)%$ ]]
         then
             blockdev="${BASH_REMATCH[3]}"
@@ -59,53 +62,103 @@ while IFS= read -r line; do
             then
                 blockdev="/dev/$blockdev"
             fi
-            echo -n "bcachefs,fspath=\"$FSPATH\",UUID=\"$UUID\",devlabel=\"${BASH_REMATCH[1]}\",devid=${BASH_REMATCH[2]},blockdev=\"$blockdev\" mode=\"${BASH_REMATCH[4]}\",usage=${BASH_REMATCH[5]}"
+            echo -n "bcachefs_devices,fspath=\"$FSPATH\",uuid=\"$uuid\",devlabel=\"${BASH_REMATCH[1]}\",devid=${BASH_REMATCH[2]},blockdev=\"$blockdev\" mode=\"${BASH_REMATCH[4]}\",usage=${BASH_REMATCH[5]}"
 
-            #echo switch to 5 label="$label" devid="$devid" block_device="$block_device" mode="$mode" usage="$usage"
             PARSER_STATE=5
-            #continue
+        #else
+            #echo unknown?
         fi
         ;;
     1)
         if [[ "$line" == "" ]]
         then
-            #echo switch to 0
             PARSER_STATE=0
-            #continue
         fi
         ;;
     2)
         if [[ "$line" == "" ]]
         then
-            #echo switch to 0
+            echo
             PARSER_STATE=0
-            #continue
+        elif [[ $line =~ ^([^[:space:]]+)[[:space:]]*(.*)$ ]]
+        then
+            field="${BASH_REMATCH[1]// /_}"
+            rest="${BASH_REMATCH[2]}"
+
+            read -r val1 val2 val3 <<<"$rest"
+            val1="$(convert_to_bytes "$val1")"
+
+            ensure_comma
+
+            echo -n "${field}_compressed=$val1"
+            if [[ ! -z "$val2" ]]
+            then
+                val2="$(convert_to_bytes "$val2")"
+                echo -n ",${field}_uncompressed=$val2"
+            fi
+            if [[ ! -z "$val3" ]]
+            then
+                val3="$(convert_to_bytes "$val3")"
+                echo -n ",${field}_avgextsize=$val3"
+            fi
+        #else
+            #echo unknown?
         fi
         ;;
     3)
         if [[ "$line" == "" ]]
         then
-            #echo switch to 0
+            echo
             PARSER_STATE=0
-            #continue
+        elif [[ $line =~ ^([^:]+)[:space:]+(.*)$ ]]
+        then
+            field="${BASH_REMATCH[1]// /_}"
+            val="${BASH_REMATCH[2]}"
+            val="$(convert_to_bytes "$val")"
+
+            ensure_comma
+
+            echo -n "$field=$val"
+        #else
+            #echo unknown?
         fi
         ;;
     4)
         if [[ "$line" == "" ]]
         then
-            #echo switch to 0
+            for field in "${REMAINING[@]}"
+            do
+                ensure_comma
+                echo -n "${field}_data=0,${field}_metadata=0"
+            done
+
+            echo
             PARSER_STATE=0
-            #continue
+        elif [[ $line =~ ^([^:]+):[[:space:]]*(.*)$ ]]
+        then
+            field="${BASH_REMATCH[1]// /_}"
+            rest="${BASH_REMATCH[2]}"
+
+            read -r val1 val2 <<<"$rest"
+            val1="$(convert_to_bytes "$val1")"
+            val2="$(convert_to_bytes "$val2")"
+
+            ensure_comma
+
+            echo -n "${field}_data=$val1,${field}_metadata=$val2"
+
+            REMAINING=( "${REMAINING[@]/$field}" )
+        #else
+            #echo unknown?
         fi
         ;;
     5)
         if [[ "$line" == "" ]]
         then
             echo
-            #echo switch to 0
             PARSER_STATE=0
-            #continue
-        elif [[ $line =~ ^[[:space:]]*([^:]+):[[:space:]]*(.*)$ ]]; then
+        elif [[ $line =~ ^[[:space:]]*([^:]+):[[:space:]]*(.*)$ ]]
+        then
             field="${BASH_REMATCH[1]// /_}"
             rest="${BASH_REMATCH[2]}"
 
@@ -133,3 +186,20 @@ while IFS= read -r line; do
     #    echo "Got line: $line"
     #fi
 done < <(sudo bcachefs fs usage -a "$FSPATH")
+
+cd "/sys/fs/bcachefs/${uuid}/options" || exit 1
+echo -n "bcachefs_options,fspath=\"$FSPATH\",uuid=\"$uuid\" "
+FIRST=1
+for i in *
+do
+    if [[ $FIRST == 1 ]]
+    then
+        FIRST=
+    else
+        echo -n ,
+    fi
+
+    echo -n "${i}=\"$(cat "$i")\""
+done
+
+echo