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The QEMU integrates with the lock manager instructure in a number of key places * During startup, a lock is acquired in between the fork & exec * During startup, the libvirtd process acquires a lock before setting file labelling * During shutdown, the libvirtd process acquires a lock before restoring file labelling * During hotplug, unplug & media change the libvirtd process holds a lock while setting/restoring labels The main content lock is only ever held by the QEMU child process, or libvirtd during VM shutdown. The rest of the operations only require libvirtd to hold the metadata locks, relying on the active QEMU still holding the content lock. * src/qemu/qemu_conf.c, src/qemu/qemu_conf.h, src/qemu/libvirtd_qemu.aug, src/qemu/test_libvirtd_qemu.aug: Add config parameter for configuring lock managers * src/qemu/qemu_driver.c: Add calls to the lock manager
66 lines
2.6 KiB
Plaintext
66 lines
2.6 KiB
Plaintext
(* /etc/libvirt/qemu.conf *)
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module Libvirtd_qemu =
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autoload xfm
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let eol = del /[ \t]*\n/ "\n"
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let value_sep = del /[ \t]*=[ \t]*/ " = "
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let indent = del /[ \t]*/ ""
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let array_sep = del /,[ \t\n]*/ ", "
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let array_start = del /\[[ \t\n]*/ "[ "
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let array_end = del /\]/ "]"
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let str_val = del /\"/ "\"" . store /[^\"]*/ . del /\"/ "\""
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let bool_val = store /0|1/
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let int_val = store /[0-9]+/
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let str_array_element = [ seq "el" . str_val ] . del /[ \t\n]*/ ""
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let str_array_val = counter "el" . array_start . ( str_array_element . ( array_sep . str_array_element ) * ) ? . array_end
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let str_entry (kw:string) = [ key kw . value_sep . str_val ]
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let bool_entry (kw:string) = [ key kw . value_sep . bool_val ]
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let int_entry (kw:string) = [ key kw . value_sep . int_val ]
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let str_array_entry (kw:string) = [ key kw . value_sep . str_array_val ]
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(* Config entry grouped by function - same order as example config *)
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let vnc_entry = str_entry "vnc_listen"
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| bool_entry "vnc_auto_unix_socket"
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| bool_entry "vnc_tls"
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| str_entry "vnc_tls_x509_cert_dir"
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| bool_entry "vnc_tls_x509_verify"
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| str_entry "vnc_password"
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| bool_entry "vnc_sasl"
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| str_entry "vnc_sasl_dir"
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| str_entry "security_driver"
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| str_entry "user"
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| str_entry "group"
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| bool_entry "dynamic_ownership"
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| str_array_entry "cgroup_controllers"
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| str_array_entry "cgroup_device_acl"
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| str_entry "save_image_format"
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| str_entry "dump_image_format"
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| str_entry "auto_dump_path"
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| str_entry "hugetlbfs_mount"
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| bool_entry "relaxed_acs_check"
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| bool_entry "vnc_allow_host_audio"
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| bool_entry "clear_emulator_capabilities"
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| bool_entry "allow_disk_format_probing"
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| bool_entry "set_process_name"
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| int_entry "max_processes"
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| str_entry "lock_manager"
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(* Each enty in the config is one of the following three ... *)
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let entry = vnc_entry
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let comment = [ label "#comment" . del /#[ \t]*/ "# " . store /([^ \t\n][^\n]*)?/ . del /\n/ "\n" ]
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let empty = [ label "#empty" . eol ]
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let record = indent . entry . eol
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let lns = ( record | comment | empty ) *
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let filter = incl "/etc/libvirt/qemu.conf"
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. Util.stdexcl
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let xfm = transform lns filter
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