diff --git a/share/completions/btrfs.fish b/share/completions/btrfs.fish
index 5cf2c45bf..d924f204d 100644
--- a/share/completions/btrfs.fish
+++ b/share/completions/btrfs.fish
@@ -1,10 +1,21 @@
 # Completions for btrfs-progs
-# Author: Akatsuki (akiirui) <imaykiller@gmail.com>
 
 # Todo:
-# 1. Detailed options per command
-# 2. Simplified descriptions
-# ...and more
+# - (Done) Detailed options per command
+# - Simplified duplicate options completion with `for`
+# - Simplified descriptions
+
+# Filter the completions per primary command
+function __btrfs_options
+    if not set -q argv[1]
+        return 1
+    end
+    set -l cmd (commandline -cp)
+    if string match -qr -- "btrfs\s+$argv[1]\s+\S*" $cmd
+        return 0
+    end
+    return 1
+end
 
 # Filter the completions per command groups
 function __btrfs_options_groups
@@ -12,12 +23,39 @@ function __btrfs_options_groups
         return 1
     end
     set -l cmd (commandline -cp)
-    if string match -qr -- "$argv\s+\S*\$" $cmd
+    if set -q argv[2]
+        if string match -qr -- "btrfs\s+$argv[1]\s+$argv[2]\s+\S*" $cmd
+            return 0
+        end
+        return 1
+    end
+    if string match -qr -- "btrfs\s+$argv[1]\s+\S*\$" $cmd
         return 0
     end
     return 1
 end
 
+set -l check '__btrfs_options check'
+set -l restore '__btrfs_options restore'
+set -l send '__btrfs_options send'
+set -l receive '__btrfs_options receive'
+set -l help '__btrfs_options help'
+
+set -l subvolume '__btrfs_options_groups subvolume'
+set -l filesystem '__btrfs_options_groups filesystem'
+set -l balance '__btrfs_options_groups balance'
+set -l device '__btrfs_options_groups device'
+set -l scrub '__btrfs_options_groups scrub'
+set -l rescue '__btrfs_options_groups rescue'
+set -l inspect_internal '__btrfs_options_groups inspect-internal'
+set -l property '__btrfs_options_groups property'
+set -l quota '__btrfs_options_groups quota'
+set -l qgroup '__btrfs_options_groups qgroup'
+set -l replace '__btrfs_options_groups replace'
+
+# Global command
+complete -f -c btrfs -l help -d 'Display help information'
+
 # Primary command
 complete -f -c btrfs -n '__fish_is_first_arg' -a check -d 'Check structural integrity of a filesystem (unmounted).'
 complete -f -c btrfs -n '__fish_is_first_arg' -a restore -d 'Try to restore files from a damaged filesystem (unmounted)'
@@ -39,96 +77,354 @@ complete -f -c btrfs -n '__fish_is_first_arg' -a quota -d 'manage filesystem quo
 complete -f -c btrfs -n '__fish_is_first_arg' -a qgroup -d 'manage quota groups'
 complete -f -c btrfs -n '__fish_is_first_arg' -a replace -d 'replace a device in the filesystem'
 
-set -l subvolume '__btrfs_options_groups subvolume'
-set -l filesystem '__btrfs_options_groups filesystem'
-set -l balance '__btrfs_options_groups balance'
-set -l device '__btrfs_options_groups device'
-set -l scrub '__btrfs_options_groups scrub'
-set -l rescue '__btrfs_options_groups rescue'
-set -l inspect_internal "__btrfs_options_groups inspect-internal"
-set -l property '__btrfs_options_groups property'
-set -l quota '__btrfs_options_groups quota'
-set -l qgroup '__btrfs_options_groups qgroup'
-set -l replace '__btrfs_options_groups replace'
+# btrfs check
+complete -f -c btrfs -n $check -s s -l super -d 'Use this SUPERBLOCK copy'
+complete -f -c btrfs -n $check -s b -l backup -d 'Use the first valid BACKUP root copy'
+complete -f -c btrfs -n $check -s r -l tree-root -d 'Use the given bytenr for the TREE root'
+complete -f -c btrfs -n $check -l chunk-root -d 'Use the given bytenr for the CHUNK-TREE root'
+complete -f -c btrfs -n $check -l readonly -d 'Run in read-only mode'
+complete -f -c btrfs -n $check -l repair -d 'Try to repair the filesystem'
+complete -f -c btrfs -n $check -l force -d 'Skip mount checks, repair is not possible'
+complete -f -c btrfs -n $check -l mode -d 'Allows choice of memory/IO trade-offs' -ra '{original,lowmem}'
+complete -f -c btrfs -n $check -l init-csum-tree -d 'Create a new CRC tree (repair only)'
+complete -f -c btrfs -n $check -l init-extent-tree -d 'Create a new extent tree (repair only)'
+complete -f -c btrfs -n $check -l clear-space-cache -d 'clear space cache (repair only)' -ra '{v1,v2}'
+complete -f -c btrfs -n $check -l check-data-csum -d 'Verify checksums of data blocks'
+complete -f -c btrfs -n $check -s Q -l qgroup-report -d 'Print a report on qgroup consistency'
+complete -f -c btrfs -n $check -s E -l subvol-extents -d 'Print subvolume extents and sharing state'
+complete -f -c btrfs -n $check -s p -l progress -d 'Indicate progress'
+
+# btrfs restore
+complete -f -c btrfs -n $restore -s s -l snapshots -d 'Get snapshots'
+complete -f -c btrfs -n $restore -s x -l xattr -d 'Restore extended attributes'
+complete -f -c btrfs -n $restore -s m -l metadata -d 'Restore owner, mode and times'
+complete -f -c btrfs -n $restore -s S -l symlink -d 'Restore symbolic links'
+complete -f -c btrfs -n $restore -s v -l verbose -d 'Verbose'
+complete -f -c btrfs -n $restore -s i -l ignore-errors -d 'Ignore errors'
+complete -f -c btrfs -n $restore -s o -l overwrite -d 'Overwrite'
+complete -f -c btrfs -n $restore -s t -d 'Tree location'
+complete -f -c btrfs -n $restore -s f -d 'Filesystem location'
+complete -f -c btrfs -n $restore -s u -l super -d 'Super mirror'
+complete -f -c btrfs -n $restore -s r -l root -d 'Root objectid'
+complete -f -c btrfs -n $restore -s d -d 'Find dir'
+complete -f -c btrfs -n $restore -s l -l list-roots -d 'List tree roots'
+complete -f -c btrfs -n $restore -s D -l dry-run -d 'Only list files that would be recovered'
+complete -f -c btrfs -n $restore -l path-regex -d 'Restore only filenames matching regex'
+complete -f -c btrfs -n $restore -s c -d 'Ignore case (--path-regex only)'
+
+# btrfs send
+complete -f -c btrfs -n $send -s e -d ''
+complete -f -c btrfs -n $send -s p -d 'Send an incremental stream from <parent> to <subvol>'
+complete -f -c btrfs -n $send -s c -d 'Use this snapshot as a clone source for an incremental send'
+complete -f -c btrfs -n $send -s f -d 'Output is normally written to stdout'
+complete -f -c btrfs -n $send -l no-data -d 'send in NO_FILE_DATA mode'
+complete -f -c btrfs -n $send -s v -l verbose -d 'Enable verbose output to stderr'
+complete -f -c btrfs -n $send -s q -l quiet -d 'Suppress all messages, except errors'
+
+# btrfs receive
+complete -f -c btrfs -n $receive -s v -d 'Increase verbosity about performed actions'
+complete -f -c btrfs -n $receive -s q -l quiet -d 'Suppress all messages, except errors'
+complete -f -c btrfs -n $receive -s f -d 'Read the stream from FILE instead of stdin'
+complete -f -c btrfs -n $receive -s e -d 'Terminate after receiving an <end cmd> marker in the stream'
+complete -f -c btrfs -n $receive -s C -l chroot -d 'Confine the process to <mount> using chroot'
+complete -f -c btrfs -n $receive -s E -l max-errors -d 'Terminate when NUMBER errors occur'
+complete -f -c btrfs -n $receive -s m -d 'The root mount point of the destination filesystem'
+complete -f -c btrfs -n $receive -l dump -d 'Dump stream metadata'
+
+# btrfs help
+complete -f -c btrfs -n $help -l full -d 'Display detailed help on every command'
+complete -f -c btrfs -n $help -l box -d 'Show list of built-in tools (busybox style)'
 
 # btrfs subvolume
 complete -f -c btrfs -n $subvolume -a create -d 'Create a subvolume'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume create' -s i -d 'Add subvolume to a qgroup (can be given multiple times)'
+
 complete -f -c btrfs -n $subvolume -a delete -d 'Delete subvolume(s)'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume delete' -s c -l commit-after -d 'Wait for transaction commit at the end of the operation'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume delete' -s C -l commit-each -d 'Wait for transaction commit after deleting each subvolume'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume delete' -s v -l verbose -d 'Verbose output of operations'
+
 complete -f -c btrfs -n $subvolume -a list -d 'List subvolumes and snapshots in the filesystem.'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume list' -s o -d 'Print only subvolumes below specified path'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume list' -s a -d 'Print all the subvolumes and absolute and relative path'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume list' -s p -d 'Print parent ID'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume list' -s c -d 'Print the ogeneration of the subvolume'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume list' -s g -d 'Print the generation of the subvolume'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume list' -s u -d 'Print the uuid of subvolumes (and snapshots)'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume list' -s q -d 'Print the parent uuid of the snapshots'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume list' -s R -d 'Print the uuid of the received snapshots'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume list' -s s -d 'List only snapshots'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume list' -s r -d 'List readonly subvolumes (including snapshots)'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume list' -s d -d 'List deleted subvolumes that are not yet cleaned'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume list' -s t -d 'Print the result as a table'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume list' -s G -d 'Filter the subvolumes by generation'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume list' -s C -d 'Filter the subvolumes by ogeneration'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume list' -l sort -d 'List the subvolume in order' -a '{gen,ogen,rootid,path}'
+
 complete -f -c btrfs -n $subvolume -a snapshot -d 'Create a snapshot of the subvolume'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume snapshot' -s r -d 'Create a readonly snapshot'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume snapshot' -s i -d 'Add snapshot to a qgroup (can be given multiple times)'
+
 complete -f -c btrfs -n $subvolume -a get-default -d 'Get the default subvolume of a filesystem'
 complete -f -c btrfs -n $subvolume -a set-default -d 'Set the default subvolume of the filesystem mounted as default.'
 complete -f -c btrfs -n $subvolume -a find-new -d 'List the recently modified files in a filesystem'
-complete -f -c btrfs -n $subvolume -a show -d 'Show more information about the subvolume (UUIDs, generations, times, snapshots)'
+
+complete -f -c btrfs -n $subvolume -a show -d 'Show more information about the subvolume'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume show' -s r -l rootid -d 'Show rootid of the subvolume'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume show' -s u -l uuid -d 'Show uuid of the subvolume'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume show' -s b -l raw -d 'Show raw numbers in bytes'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume show' -s h -l human-readable -d 'Show human friendly numbers, base 1024'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume show' -s H -d 'Show human friendly numbers, base 1000'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume show' -l iec -d 'Use 1024 as a base (KiB, MiB, GiB, TiB)'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume show' -l si -d 'Use 1000 as a base (kB, MB, GB, TB)'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume show' -s k -l kbytes -d 'Show sizes in KiB, or kB with --si'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume show' -s m -l mbytes -d 'Show sizes in MiB, or MB with --si'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume show' -s g -l gbytes -d 'Show sizes in GiB, or GB with --si'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume show' -s t -l tbytes -d 'Show sizes in TiB, or TB with --si'
+
 complete -f -c btrfs -n $subvolume -a sync -d 'Wait until given subvolume(s) are completely removed from the filesystem.'
+complete -f -c btrfs -n '__btrfs_options_groups subvolume sync' -s s -d 'Sleep NUMBER seconds between checks'
 
 # btrfs filesystem
 complete -f -c btrfs -n $filesystem -a df -d 'Show space usage information for a mount point'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem df' -s b -l raw -d 'Show raw numbers in bytes'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem df' -s h -l human-readable -d 'Show human friendly numbers, base 1024'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem df' -s H -d 'Show human friendly numbers, base 1000'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem df' -l iec -d 'Use 1024 as a base (KiB, MiB, GiB, TiB)'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem df' -l si -d 'Use 1000 as a base (kB, MB, GB, TB)'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem df' -s k -l kbytes -d 'Show sizes in KiB, or kB with --si'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem df' -s m -l mbytes -d 'Show sizes in MiB, or MB with --si'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem df' -s g -l gbytes -d 'Show sizes in GiB, or GB with --si'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem df' -s t -l tbytes -d 'Show sizes in TiB, or TB with --si'
+
 complete -f -c btrfs -n $filesystem -a du -d 'Summarize disk usage of each file.'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem du' -s s -l summarize -d 'Display only a total for each argument'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem du' -l raw -d 'Show raw numbers in bytes'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem du' -l human-readable -d 'Show human friendly numbers, base 1024'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem du' -l iec -d 'Use 1024 as a base (KiB, MiB, GiB, TiB)'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem du' -l si -d 'Use 1000 as a base (kB, MB, GB, TB)'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem du' -l kbytes -d 'Show sizes in KiB, or kB with --si'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem du' -l mbytes -d 'Show sizes in MiB, or MB with --si'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem du' -l gbytes -d 'Show sizes in GiB, or GB with --si'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem du' -l tbytes -d 'Show sizes in TiB, or TB with --si'
+
 complete -f -c btrfs -n $filesystem -a show -d 'Show the structure of a filesystem'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem show' -s d -l all-devices -d 'Show only disks under /dev containing btrfs filesystem'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem show' -s m -l mounted -d 'Show only mounted btrfs'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem show' -l raw -d 'Show raw numbers in bytes'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem show' -l human-readable -d 'Show human friendly numbers, base 1024'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem show' -l iec -d 'Use 1024 as a base (KiB, MiB, GiB, TiB)'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem show' -l si -d 'Use 1000 as a base (kB, MB, GB, TB)'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem show' -l kbytes -d 'Show sizes in KiB, or kB with --si'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem show' -l mbytes -d 'Show sizes in MiB, or MB with --si'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem show' -l gbytes -d 'Show sizes in GiB, or GB with --si'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem show' -l tbytes -d 'Show sizes in TiB, or TB with --si'
+
 complete -f -c btrfs -n $filesystem -a sync -d 'Force a sync on a filesystem'
+
 complete -f -c btrfs -n $filesystem -a defragment -d 'Defragment a file or a directory'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem defragment' -s v -d 'Be verbose'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem defragment' -s r -d 'Defragment files recursively'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem defragment' -s c -d 'Compress the file while defragmenting' -ra '{zlib,lzo,zstd}'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem defragment' -s f -d 'Flush data to disk immediately after defragmenting'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem defragment' -s s -d 'Defragment only from NUMBER byte onward'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem defragment' -s l -d 'Defragment only up to LEN bytes'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem defragment' -s t -d 'Target extent SIZE hint'
+
 complete -f -c btrfs -n $filesystem -a resize -d 'Resize a filesystem'
 complete -f -c btrfs -n $filesystem -a label -d 'Get or change the label of a filesystem'
+
 complete -f -c btrfs -n $filesystem -a usage -d 'Show detailed information about internal filesystem usage.'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem usage' -s b -l raw -d 'Show raw numbers in bytes'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem usage' -s h -l human-readable -d 'Show human friendly numbers, base 1024'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem usage' -s H -d 'Show human friendly numbers, base 1000'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem usage' -l iec -d 'Use 1024 as a base (KiB, MiB, GiB, TiB)'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem usage' -l si -d 'Use 1000 as a base (kB, MB, GB, TB)'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem usage' -s k -l kbytes -d 'Show sizes in KiB, or kB with --si'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem usage' -s m -l mbytes -d 'Show sizes in MiB, or MB with --si'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem usage' -s g -l gbytes -d 'Show sizes in GiB, or GB with --si'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem usage' -s t -l tbytes -d 'Show sizes in TiB, or TB with --si'
+complete -f -c btrfs -n '__btrfs_options_groups filesystem usage' -s T -d 'Show data in tabular format'
 
 # btrfs balance
 complete -f -c btrfs -n $balance -a start -d 'Balance chunks across the devices'
+complete -f -c btrfs -n '__btrfs_options_groups balance start' -s d -d 'Act on data chunks with FILTERS'
+complete -f -c btrfs -n '__btrfs_options_groups balance start' -s m -d 'Act on metadata chunks with FILTERS'
+complete -f -c btrfs -n '__btrfs_options_groups balance start' -s s -d 'Act on system chunks with FILTERS (only under -f)'
+complete -f -c btrfs -n '__btrfs_options_groups balance start' -s v -d 'Be verbose'
+complete -f -c btrfs -n '__btrfs_options_groups balance start' -s f -d 'Force a reduction of metadata integrity'
+complete -f -c btrfs -n '__btrfs_options_groups balance start' -l full-balance -d 'Do not print warning and do not delay start'
+complete -f -c btrfs -n '__btrfs_options_groups balance start' -l background -l bg -d 'Run the balance as a background process'
+
 complete -f -c btrfs -n $balance -a pause -d 'Pause running balance'
 complete -f -c btrfs -n $balance -a cancel -d 'Cancel running or paused balance'
 complete -f -c btrfs -n $balance -a resume -d 'Resume interrupted balance'
+
 complete -f -c btrfs -n $balance -a status -d 'Show status of running or paused balance'
+complete -f -c btrfs -n '__btrfs_options_groups balance status' -s v -d 'Be verbose'
 
 # btrfs device
 complete -f -c btrfs -n $device -a add -d 'Add one or more devices to a mounted filesystem.'
+complete -f -c btrfs -n '__btrfs_options_groups device add' -s K -l nodiscard -d 'Do not perform TRIM on DEVICES'
+complete -f -c btrfs -n '__btrfs_options_groups device add' -s f -l force -d 'Force overwrite existing filesystem on the disk'
+
 complete -f -c btrfs -n $device -a delete -d 'Remove a device from a filesystem'
 complete -f -c btrfs -n $device -a remove -d 'Remove a device from a filesystem'
+
 complete -f -c btrfs -n $device -a scan -d 'Scan or forget (unregister) devices of btrfs filesystems'
+complete -f -c btrfs -n '__btrfs_options_groups device scan' -s d -l all-devices -d 'Enumerate and register all devices'
+complete -f -c btrfs -n '__btrfs_options_groups device scan' -s u -l forget -d 'Unregister a given device or all stale devices'
+
 complete -f -c btrfs -n $device -a ready -d 'Check and wait until a group of devices of a filesystem is ready for mount'
+
 complete -f -c btrfs -n $device -a stats -d 'Show device IO error statistics'
+complete -f -c btrfs -n '__btrfs_options_groups device stats' -s c -l check -d 'Return non-zero if any stat counter is not zero'
+complete -f -c btrfs -n '__btrfs_options_groups device stats' -s z -l reset -d 'Show current stats and reset values to zero'
+
 complete -f -c btrfs -n $device -a usage -d 'Show detailed information about internal allocations in devices.'
+complete -f -c btrfs -n '__btrfs_options_groups device usage' -s b -l raw -d 'Show raw numbers in bytes'
+complete -f -c btrfs -n '__btrfs_options_groups device usage' -s h -l human-readable -d 'Show human friendly numbers, base 1024'
+complete -f -c btrfs -n '__btrfs_options_groups device usage' -s H -d 'Show human friendly numbers, base 1000'
+complete -f -c btrfs -n '__btrfs_options_groups device usage' -l iec -d 'Use 1024 as a base (KiB, MiB, GiB, TiB)'
+complete -f -c btrfs -n '__btrfs_options_groups device usage' -l si -d 'Use 1000 as a base (kB, MB, GB, TB)'
+complete -f -c btrfs -n '__btrfs_options_groups device usage' -s k -l kbytes -d 'Show sizes in KiB, or kB with --si'
+complete -f -c btrfs -n '__btrfs_options_groups device usage' -s m -l mbytes -d 'Show sizes in MiB, or MB with --si'
+complete -f -c btrfs -n '__btrfs_options_groups device usage' -s g -l gbytes -d 'Show sizes in GiB, or GB with --si'
+complete -f -c btrfs -n '__btrfs_options_groups device usage' -s t -l tbytes -d 'Show sizes in TiB, or TB with --si'
 
 # btrfs scrub
 complete -f -c btrfs -n $scrub -a start -d 'Start a new scrub. If a scrub is already running, the new one fails.'
+complete -f -c btrfs -n '__btrfs_options_groups scrub start' -s B -d 'Do not background'
+complete -f -c btrfs -n '__btrfs_options_groups scrub start' -s d -d 'Stats per device (-B only)'
+complete -f -c btrfs -n '__btrfs_options_groups scrub start' -s q -d 'Be quiet'
+complete -f -c btrfs -n '__btrfs_options_groups scrub start' -s r -d 'Read only mode'
+complete -f -c btrfs -n '__btrfs_options_groups scrub start' -s R -d 'Raw print mode, print full data instead of summary'
+complete -f -c btrfs -n '__btrfs_options_groups scrub start' -s c -d 'Set ioprio class (see ionice(1) manpage)'
+complete -f -c btrfs -n '__btrfs_options_groups scrub start' -s n -d 'Set ioprio classdata (see ionice(1) manpage)'
+complete -f -c btrfs -n '__btrfs_options_groups scrub start' -s f -d 'Force starting new scrub'
+
 complete -f -c btrfs -n $scrub -a cancel -d 'Cancel a running scrub'
+
 complete -f -c btrfs -n $scrub -a resume -d 'Resume previously canceled or interrupted scrub'
+complete -f -c btrfs -n '__btrfs_options_groups scrub resume' -s B -d 'Do not background'
+complete -f -c btrfs -n '__btrfs_options_groups scrub resume' -s d -d 'Stats per device (-B only)'
+complete -f -c btrfs -n '__btrfs_options_groups scrub resume' -s q -d 'Be quiet'
+complete -f -c btrfs -n '__btrfs_options_groups scrub resume' -s r -d 'Read only mode'
+complete -f -c btrfs -n '__btrfs_options_groups scrub resume' -s R -d 'Raw print mode, print full data instead of summary'
+complete -f -c btrfs -n '__btrfs_options_groups scrub resume' -s c -d 'Set ioprio class (see ionice(1) manpage)'
+complete -f -c btrfs -n '__btrfs_options_groups scrub resume' -s n -d 'Set ioprio classdata (see ionice(1) manpage)'
+
 complete -f -c btrfs -n $scrub -a status -d 'Show status of running or finished scrub'
+complete -f -c btrfs -n '__btrfs_options_groups scrub status' -s d -d 'Stats per DEVICE'
+complete -f -c btrfs -n '__btrfs_options_groups scrub status' -s R -d 'Print raw stats'
 
 # btrfs rescue
 complete -f -c btrfs -n $rescue -a chunk-recover -d 'Recover the chunk tree by scanning the devices one by one.'
+complete -f -c btrfs -n '__btrfs_options_groups rescue chunk-recover' -s y -d 'Assume an answer of YES to all questions'
+complete -f -c btrfs -n '__btrfs_options_groups rescue chunk-recover' -s v -d 'Verbose mode'
+
 complete -f -c btrfs -n $rescue -a super-recover -d 'Recover bad superblocks from good copies'
+complete -f -c btrfs -n '__btrfs_options_groups rescue super-recover' -s y -d 'Assume an answer of YES to all questions'
+complete -f -c btrfs -n '__btrfs_options_groups rescue super-recover' -s v -d 'Verbose mode'
+
 complete -f -c btrfs -n $rescue -a zero-log -d 'Clear the tree log. Usable if it\'s corrupted and prevents mount.'
 complete -f -c btrfs -n $rescue -a fix-device-size -d 'Re-align device and super block sizes. Usable if newer kernel refuse to mount it due to mismatch super size'
 
 # btrfs inspect-internal
 complete -f -c btrfs -n $inspect_internal -a inode-resolve -d 'Get file system paths for the given inode'
+complete -f -c btrfs -n '__btrfs_options_groups inspect-internal inode-resolve' -s v -d 'Verbose mode'
+
 complete -f -c btrfs -n $inspect_internal -a logical-resolve -d 'Get file system paths for the given logical address'
+complete -f -c btrfs -n '__btrfs_options_groups inspect-internal logical-resolve' -s P -d 'Skip the path resolving and print the inodes instead'
+complete -f -c btrfs -n '__btrfs_options_groups inspect-internal logical-resolve' -s v -d 'Verbose mode'
+complete -f -c btrfs -n '__btrfs_options_groups inspect-internal logical-resolve' -s s -d 'Set inode container\'s SIZE'
+
 complete -f -c btrfs -n $inspect_internal -a subvolid-resolve -d 'Get file system paths for the given subvolume ID.'
 complete -f -c btrfs -n $inspect_internal -a rootid -d 'Get tree ID of the containing subvolume of path.'
+
 complete -f -c btrfs -n $inspect_internal -a min-dev-size -d 'Get the minimum size the device can be shrunk to. The device id 1 is used by default.'
+complete -f -c btrfs -n '__btrfs_options_groups inspect-internal min-dev-size' -l id -d 'Specify the DEVICE-ID to query'
+
 complete -f -c btrfs -n $inspect_internal -a dump-tree -d 'Dump tree structures from a given device'
+complete -f -c btrfs -n '__btrfs_options_groups inspect-internal dump-tree' -s e -l extents -d 'Print only extent info: extent and device trees'
+complete -f -c btrfs -n '__btrfs_options_groups inspect-internal dump-tree' -s d -l device -d 'Print only device info: tree root, chunk and device trees'
+complete -f -c btrfs -n '__btrfs_options_groups inspect-internal dump-tree' -s r -l roots -d 'Print only short root node info'
+complete -f -c btrfs -n '__btrfs_options_groups inspect-internal dump-tree' -s R -l backups -d 'Print short root node info and backup root info'
+complete -f -c btrfs -n '__btrfs_options_groups inspect-internal dump-tree' -s u -l uuid -d 'Print only the uuid tree'
+complete -f -c btrfs -n '__btrfs_options_groups inspect-internal dump-tree' -s b -l block -d 'Print info from the specified BLOCK only'
+complete -f -c btrfs -n '__btrfs_options_groups inspect-internal dump-tree' -s t -l tree -d 'Print only tree with the given ID'
+complete -f -c btrfs -n '__btrfs_options_groups inspect-internal dump-tree' -l follow -d 'Use with -b, to show all children tree blocks of <block_num>'
+complete -f -c btrfs -n '__btrfs_options_groups inspect-internal dump-tree' -l noscan -d 'Do not scan the devices from the filesystem'
+complete -f -c btrfs -n '__btrfs_options_groups inspect-internal dump-tree' -l bfs -d 'Breadth-first traversal of the trees, print nodes, then leaves'
+complete -f -c btrfs -n '__btrfs_options_groups inspect-internal dump-tree' -l dfs -d 'Depth-first traversal of the trees'
+
 complete -f -c btrfs -n $inspect_internal -a dump-super -d 'Dump superblock from a device in a textual form'
+complete -f -c btrfs -n '__btrfs_options_groups inspect-internal dump-super' -s f -l full -d 'Print full superblock information, backup roots etc.'
+complete -f -c btrfs -n '__btrfs_options_groups inspect-internal dump-super' -s a -l all -d 'Print information about all superblocks'
+complete -f -c btrfs -n '__btrfs_options_groups inspect-internal dump-super' -s s -l super -d 'Specify which SUPER-BLOCK copy to print out' -ra '{0,1,2}'
+complete -f -c btrfs -n '__btrfs_options_groups inspect-internal dump-super' -s F -l force -d 'Attempt to dump superblocks with bad magic'
+complete -f -c btrfs -n '__btrfs_options_groups inspect-internal dump-super' -l bytenr -d 'Specify alternate superblock OFFSET'
+
 complete -f -c btrfs -n $inspect_internal -a tree-stats -d 'Print various stats for trees'
+complete -f -c btrfs -n '__btrfs_options_groups inspect-internal tree-stats' -s b -d 'Show raw numbers in bytes'
 
 # btrfs property
 complete -f -c btrfs -n $property -a get -d 'Get a property value of a btrfs object'
+complete -f -c btrfs -n '__btrfs_options_groups property get' -s t -d 'List properties for the given object type' -ra '{inode,subvol,filesystem,device}'
+
 complete -f -c btrfs -n $property -a set -d 'Set a property on a btrfs object'
+complete -f -c btrfs -n '__btrfs_options_groups property set' -s t -d 'List properties for the given object type' -ra '{inode,subvol,filesystem,device}'
+
 complete -f -c btrfs -n $property -a list -d 'Lists available properties with their descriptions for the given object'
+complete -f -c btrfs -n '__btrfs_options_groups property list' -s t -d 'List properties for the given object type' -ra '{inode,subvol,filesystem,device}'
+
 
 # btrfs quota
 complete -f -c btrfs -n $quota -a enable -d 'Enable subvolume quota support for a filesystem.'
 complete -f -c btrfs -n $quota -a disable -d 'Disable subvolume quota support for a filesystem.'
+
 complete -f -c btrfs -n $quota -a rescan -d 'Trash all qgroup numbers and scan the metadata again with the current config.'
+complete -f -c btrfs -n '__btrfs_options_groups quota rescan' -s s -d 'Show status of a running rescan operation'
+complete -f -c btrfs -n '__btrfs_options_groups quota rescan' -s w -d 'Wait for rescan operation to finish'
 
 # btrfs qgroup
 complete -f -c btrfs -n $qgroup -a assign -d 'Assign SRC as the child qgroup of DST'
+complete -f -c btrfs -n '__btrfs_options_groups qgroup assign' -l rescan -d 'Schedule qutoa rescan if needed'
+complete -f -c btrfs -n '__btrfs_options_groups qgroup assign' -l no-rescan -d 'Don\'t schedule quota rescan'
+
 complete -f -c btrfs -n $qgroup -a remove -d 'Remove a child qgroup SRC from DST.'
 complete -f -c btrfs -n $qgroup -a create -d 'Create a subvolume quota group.'
 complete -f -c btrfs -n $qgroup -a destroy -d 'Destroy a quota group.'
+
 complete -f -c btrfs -n $qgroup -a show -d 'Show subvolume quota groups.'
+complete -f -c btrfs -n '__btrfs_options_groups qgroup show' -s p -d 'Print parent qgroup id'
+complete -f -c btrfs -n '__btrfs_options_groups qgroup show' -s c -d 'Print child qgroup id'
+complete -f -c btrfs -n '__btrfs_options_groups qgroup show' -s r -d 'Print limit of referenced size of qgroup'
+complete -f -c btrfs -n '__btrfs_options_groups qgroup show' -s e -d 'Print limit of exclusive size of qgroup'
+complete -f -c btrfs -n '__btrfs_options_groups qgroup show' -s F -d 'List all qgroups including ancestral qgroups'
+complete -f -c btrfs -n '__btrfs_options_groups qgroup show' -s f -d 'List all qgroups excluding ancestral qgroups'
+complete -f -c btrfs -n '__btrfs_options_groups qgroup show' -l raw -d 'Show raw numbers in bytes'
+complete -f -c btrfs -n '__btrfs_options_groups qgroup show' -l human-readable -d 'Show human friendly numbers, base 1024'
+complete -f -c btrfs -n '__btrfs_options_groups qgroup show' -l iec -d 'Use 1024 as a base (KiB, MiB, GiB, TiB)'
+complete -f -c btrfs -n '__btrfs_options_groups qgroup show' -l si -d 'Use 1000 as a base (kB, MB, GB, TB)'
+complete -f -c btrfs -n '__btrfs_options_groups qgroup show' -l kbytes -d 'Show sizes in KiB, or kB with --si'
+complete -f -c btrfs -n '__btrfs_options_groups qgroup show' -l mbytes -d 'Show sizes in MiB, or MB with --si'
+complete -f -c btrfs -n '__btrfs_options_groups qgroup show' -l gbytes -d 'Show sizes in GiB, or GB with --si'
+complete -f -c btrfs -n '__btrfs_options_groups qgroup show' -l tbytes -d 'Show sizes in TiB, or TB with --si'
+complete -f -c btrfs -n '__btrfs_options_groups qgroup show' -l sort -d 'List qgroups sorted by specified items' -a '{qgroupid,rfer,excl,max_rfer,max_excl}'
+complete -f -c btrfs -n '__btrfs_options_groups qgroup show' -l sync -d 'Force sync of the filesystem before getting info'
+
 complete -f -c btrfs -n $qgroup -a limit -d 'Set the limits a subvolume quota group.'
+complete -f -c btrfs -n '__btrfs_options_groups qgroup limit' -s c -d 'Limit amount of data after compression'
+complete -f -c btrfs -n '__btrfs_options_groups qgroup limit' -s e -d 'Limit space exclusively assigned to this qgroup'
 
 # btrfs replace
 complete -f -c btrfs -n $replace -a start -d 'Replace device of a btrfs filesystem.'
+complete -f -c btrfs -n '__btrfs_options_groups replace start' -s r -d 'Only read from <srcdev> if no other zero-defect mirror exists'
+complete -f -c btrfs -n '__btrfs_options_groups replace start' -s f -d 'Force using and overwriting <targetdev>'
+complete -f -c btrfs -n '__btrfs_options_groups replace start' -s B -d 'Do not background'
+
 complete -f -c btrfs -n $replace -a status -d 'Print status and progress information of a running device replace'
+complete -f -c btrfs -n '__btrfs_options_groups replace status' -s 1 -d 'Only print once until the replace operation finishes'
+
 complete -f -c btrfs -n $replace -a cancel -d 'Cancel a running device replace operation.'