137 lines
4.2 KiB
Plaintext
137 lines
4.2 KiB
Plaintext
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(* Process /etc/multipath.conf *)
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(* The lens is based on the multipath.conf(5) man page *)
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module Multipath =
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autoload xfm
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let comment = Util.comment
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let empty = Util.empty
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let dels = Util.del_str
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let eol = Util.eol
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let ws = del /[ \t]+/ " "
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let indent = del /[ \t]*/ ""
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(* We require that braces are always followed by a newline *)
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let obr = del /\{([ \t]*)\n/ "{\n"
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let cbr = del /[ \t]*}[ \t]*\n/ "}\n"
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(* Like Rx.fspath, but we disallow quotes at the beginning or end *)
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let fspath = /[^" \t\n]|[^" \t\n][^ \t\n]*[^" \t\n]/
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let ikey (k:regexp) = indent . key k
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let section (n:regexp) (b:lens) =
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[ ikey n . ws . obr . (b|empty|comment)* . cbr ]
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let kv (k:regexp) (v:regexp) =
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[ ikey k . ws . del /"?/ "" . store v . del /"?/ "" . eol ]
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(* FIXME: it would be much more concise to write *)
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(* [ key k . ws . (bare | quoted) ] *)
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(* but the typechecker trips over that *)
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let qstr (k:regexp) =
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let delq = del /['"]/ "\"" in
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let bare = del /["']?/ "" . store /[^"' \t\n]+/ . del /["']?/ "" in
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let quoted = delq . store /.*[ \t].*/ . delq in
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[ ikey k . ws . bare . eol ]
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|[ ikey k . ws . quoted . eol ]
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(* Settings that can be changed in various places *)
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let common_setting =
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qstr "path_selector"
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|kv "path_grouping_policy" /failover|multibus|group_by_(serial|prio|node_name)/
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|kv "path_checker" /tur|emc_clariion|hp_sw|rdac|directio|rdb|readsector0/
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|kv "prio" /const|emc|alua|ontap|rdac|hp_sw|hds|random|weightedpath/
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|qstr "prio_args"
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|kv "failback" (Rx.integer | /immediate|manual|followover/)
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|kv "rr_weight" /priorities|uniform/
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|kv "flush_on_last_del" /yes|no/
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|kv "user_friendly_names" /yes|no/
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|kv "no_path_retry" (Rx.integer | /fail|queue/)
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|kv /rr_min_io(_q)?/ Rx.integer
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|qstr "features"
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|kv "reservation_key" Rx.word
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|kv "deferred_remove" /yes|no/
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|kv "delay_watch_checks" (Rx.integer | "no")
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|kv "delay_wait_checks" (Rx.integer | "no")
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|kv "skip_kpartx" /yes|no/
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(* Deprecated settings for backwards compatibility *)
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|qstr /(getuid|prio)_callout/
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(* Settings not documented in `man multipath.conf` *)
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|kv /rr_min_io_rq/ Rx.integer
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|kv "udev_dir" fspath
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|qstr "selector"
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|kv "async_timeout" Rx.integer
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|kv "pg_timeout" Rx.word
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|kv "h_on_last_deleassign_maps" /yes|no/
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|qstr "uid_attribute"
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|kv "hwtable_regex_match" /yes|no|on|off/
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|kv "reload_readwrite" /yes|no/
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let default_setting =
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common_setting
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|kv "polling_interval" Rx.integer
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|kv "max_polling_interval" Rx.integer
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|kv "multipath_dir" fspath
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|kv "find_multipaths" /yes|no/
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|kv "verbosity" /[0-6]/
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|kv "reassign_maps" /yes|no/
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|kv "uid_attrribute" Rx.word
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|kv "max_fds" (Rx.integer|"max")
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|kv "checker_timeout" Rx.integer
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|kv "fast_io_fail_tmo" (Rx.integer|"off")
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|kv "dev_loss_tmo" (Rx.integer|"infinity")
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|kv "queue_without_daemon" /yes|no/
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|kv "bindings_file" fspath
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|kv "wwids_file" fspath
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|kv "log_checker_err" /once|always/
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|kv "retain_attached_hw_handler" /yes|no/
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|kv "detect_prio" /yes|no/
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|kv "hw_str_match" /yes|no/
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|kv "force_sync" /yes|no/
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|kv "config_dir" fspath
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|kv "missing_uev_wait_timeout" Rx.integer
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|kv "ignore_new_boot_devs" /yes|no/
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|kv "retrigger_tries" Rx.integer
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|kv "retrigger_delay" Rx.integer
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|kv "new_bindings_in_boot" /yes|no/
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(* A device subsection *)
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let device =
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let setting =
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qstr /vendor|product|product_blacklist|hardware_handler|alias_prefix/
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|default_setting in
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section "device" setting
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(* The defaults section *)
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let defaults =
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section "defaults" default_setting
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(* The blacklist and blacklist_exceptions sections *)
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let blacklist =
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let setting =
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qstr /devnode|wwid|property/
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|device in
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section /blacklist(_exceptions)?/ setting
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(* A multipath subsection *)
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let multipath =
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let setting =
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kv "wwid" (Rx.word|"*")
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|qstr "alias"
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|common_setting in
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section "multipath" setting
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(* The multipaths section *)
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let multipaths =
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section "multipaths" multipath
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(* The devices section *)
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let devices =
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section "devices" device
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let lns = (comment|empty|defaults|blacklist|devices|multipaths)*
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let xfm = transform lns (incl "/etc/multipath.conf" .
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incl "/etc/multipath/conf.d/*.conf")
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