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lvm2/tools/vals.h

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commands: new method for defining commands . Define a prototype for every lvm command. . Match every user command with one definition. . Generate help text and man pages from them. The new file command-lines.in defines a prototype for every unique lvm command. A unique lvm command is a unique combination of: command name + required option args + required positional args. Each of these prototypes also includes the optional option args and optional positional args that the command will accept, a description, and a unique string ID for the definition. Any valid command will match one of the prototypes. Here's an example of the lvresize command definitions from command-lines.in, there are three unique lvresize commands: lvresize --size SizeMB LV OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB, --poolmetadatasize SizeMB OP: PV ... ID: lvresize_by_size DESC: Resize an LV by a specified size. lvresize LV PV ... OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB ID: lvresize_by_pv DESC: Resize an LV by specified PV extents. FLAGS: SECONDARY_SYNTAX lvresize --poolmetadatasize SizeMB LV_thinpool OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --stripes Number, --stripesize SizeKB OP: PV ... ID: lvresize_pool_metadata_by_size DESC: Resize a pool metadata SubLV by a specified size. The three commands have separate definitions because they have different required parameters. Required parameters are specified on the first line of the definition. Optional options are listed after OO, and optional positional args are listed after OP. This data is used to generate corresponding command definition structures for lvm in command-lines.h. usage/help output is also auto generated, so it is always in sync with the definitions. Every user-entered command is compared against the set of command structures, and matched with one. An error is reported if an entered command does not have the required parameters for any definition. The closest match is printed as a suggestion, and running lvresize --help will display the usage for each possible lvresize command. The prototype syntax used for help/man output includes required --option and positional args on the first line, and optional --option and positional args enclosed in [ ] on subsequent lines. command_name <required_opt_args> <required_pos_args> [ <optional_opt_args> ] [ <optional_pos_args> ] Command definitions that are not to be advertised/suggested have the flag SECONDARY_SYNTAX. These commands will not be printed in the normal help output. Man page prototypes are also generated from the same original command definitions, and are always in sync with the code and help text. Very early in command execution, a matching command definition is found. lvm then knows the operation being done, and that the provided args conform to the definition. This will allow lots of ad hoc checking/validation to be removed throughout the code. Each command definition can also be routed to a specific function to implement it. The function is associated with an enum value for the command definition (generated from the ID string.) These per-command-definition implementation functions have not yet been created, so all commands currently fall back to the existing per-command-name implementation functions. Using per-command-definition functions will allow lots of code to be removed which tries to figure out what the command is meant to do. This is currently based on ad hoc and complicated option analysis. When using the new functions, what the command is doing is already known from the associated command definition.
2016-08-12 23:52:18 +03:00
/*
* Define value types which describe values accepted
* by the --option's in args.h, and can also describe
* the values accepted as positional args.
*
* Previously, accepted values were only "described"
* by identifying the parsing function to use.
*
* Some standard val types are used by many options,
* e.g. many options (aa_ARG, bb_ARG, cc_ARG) all
* accept a number_VAL.
*
* Other special val types are used by only one option,
* e.g. only mirrorlog_ARG accepts a mirrorlog_VAL.
* This typically means that there are some specific
* words that are recognized after the option.
*
* Some options currently take a standard val type,
* (esp string_VAL), but they could be given their
* own custom val type. The advantage of using a
* custom val type is the possibility of validating
* the value when parsing it with a custom parsing
* function, and the possibility of displaying the
* actual accepted values in the command usage.
* Without a custom val type, the code must do ad hoc
* validation of the string values, and the usage
* output for the option will only say "String"
* rather than giving the accepted string values.
* Even without a custom parsing function, there is
* reason to define a custom x_VAL enum so that a
* more descriptive usage string can be specified
* as opposed to just "String".
*
* Most of the val types defined here are used after
* --option's, and are referenced in foo_ARG entries
* in args.h. But, some val types are only used to
* represent positional values in command definitions,
* e.g. vg_VAL.
*
* val(a, b, c, d)
*
* a: foo_VAL enums
* b: the function to parse and set the value
* c: the name used to reference this value in command defs
* d: what to display in usage output for this value
*
* command defintions will use --option NAME, where NAME
* is shown in val() field c. NAME will be translated to
* foo_VAL enum in field a, which is used in commands[]
* structs.
*
* option definitions (arg.h) will reference foo_VAL enum
* in field a.
*
* FIXME: for specialized val types, the set of recognized
* words is not defined or stored in a consistent way,
* but is just whatever the parsing function happens to look
* for, so adding a new accepted value for the val type is
* generally making the parsing function recognize a new
* word, and making the implementation code also recognize
* that word to do something different. This new word should
* then also be added to the usage string for the val type here.
* It would be nice if the accepted values could be defined in a
* more consistent way, and perhaps in a single place, perhaps in
commands: combine duplicate arrays for opt and val command.c and lvmcmdline.c each had a full array defining all options and values. This duplication was not removed when the command.c code was merged into the run time.
2017-03-07 20:47:44 +03:00
* struct val_names.
commands: new method for defining commands . Define a prototype for every lvm command. . Match every user command with one definition. . Generate help text and man pages from them. The new file command-lines.in defines a prototype for every unique lvm command. A unique lvm command is a unique combination of: command name + required option args + required positional args. Each of these prototypes also includes the optional option args and optional positional args that the command will accept, a description, and a unique string ID for the definition. Any valid command will match one of the prototypes. Here's an example of the lvresize command definitions from command-lines.in, there are three unique lvresize commands: lvresize --size SizeMB LV OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB, --poolmetadatasize SizeMB OP: PV ... ID: lvresize_by_size DESC: Resize an LV by a specified size. lvresize LV PV ... OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB ID: lvresize_by_pv DESC: Resize an LV by specified PV extents. FLAGS: SECONDARY_SYNTAX lvresize --poolmetadatasize SizeMB LV_thinpool OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --stripes Number, --stripesize SizeKB OP: PV ... ID: lvresize_pool_metadata_by_size DESC: Resize a pool metadata SubLV by a specified size. The three commands have separate definitions because they have different required parameters. Required parameters are specified on the first line of the definition. Optional options are listed after OO, and optional positional args are listed after OP. This data is used to generate corresponding command definition structures for lvm in command-lines.h. usage/help output is also auto generated, so it is always in sync with the definitions. Every user-entered command is compared against the set of command structures, and matched with one. An error is reported if an entered command does not have the required parameters for any definition. The closest match is printed as a suggestion, and running lvresize --help will display the usage for each possible lvresize command. The prototype syntax used for help/man output includes required --option and positional args on the first line, and optional --option and positional args enclosed in [ ] on subsequent lines. command_name <required_opt_args> <required_pos_args> [ <optional_opt_args> ] [ <optional_pos_args> ] Command definitions that are not to be advertised/suggested have the flag SECONDARY_SYNTAX. These commands will not be printed in the normal help output. Man page prototypes are also generated from the same original command definitions, and are always in sync with the code and help text. Very early in command execution, a matching command definition is found. lvm then knows the operation being done, and that the provided args conform to the definition. This will allow lots of ad hoc checking/validation to be removed throughout the code. Each command definition can also be routed to a specific function to implement it. The function is associated with an enum value for the command definition (generated from the ID string.) These per-command-definition implementation functions have not yet been created, so all commands currently fall back to the existing per-command-name implementation functions. Using per-command-definition functions will allow lots of code to be removed which tries to figure out what the command is meant to do. This is currently based on ad hoc and complicated option analysis. When using the new functions, what the command is doing is already known from the associated command definition.
2016-08-12 23:52:18 +03:00
*
* The usage text for an option is not always the full
* set of words accepted for an option, but may be a
* subset. i.e. an outdated word that no longer does
* anything may not be shown, but may still be recognized
* and ignored, or an option that shouldn't be used in
* general isn't shown to avoid suggesting it.
* e.g. for --activate we show the most common "y|n|ay"
* without showing the lvmlockd variations "ey|sy" which
* are not applicable in general.
*
* FIXME: are there some specialized or irrelevant
* options included in the usage text below that should
Remove lvm1 and pool disk formats There are likely more bits of code that can be removed, e.g. lvm1/pool-specific bits of code that were identified using FMT flags. The vgconvert command can likely be reduced further. The lvm1-specific config settings should probably have some other fields set for proper deprecation.
2018-04-28 00:22:46 +03:00
* be removed?
commands: new method for defining commands . Define a prototype for every lvm command. . Match every user command with one definition. . Generate help text and man pages from them. The new file command-lines.in defines a prototype for every unique lvm command. A unique lvm command is a unique combination of: command name + required option args + required positional args. Each of these prototypes also includes the optional option args and optional positional args that the command will accept, a description, and a unique string ID for the definition. Any valid command will match one of the prototypes. Here's an example of the lvresize command definitions from command-lines.in, there are three unique lvresize commands: lvresize --size SizeMB LV OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB, --poolmetadatasize SizeMB OP: PV ... ID: lvresize_by_size DESC: Resize an LV by a specified size. lvresize LV PV ... OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB ID: lvresize_by_pv DESC: Resize an LV by specified PV extents. FLAGS: SECONDARY_SYNTAX lvresize --poolmetadatasize SizeMB LV_thinpool OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --stripes Number, --stripesize SizeKB OP: PV ... ID: lvresize_pool_metadata_by_size DESC: Resize a pool metadata SubLV by a specified size. The three commands have separate definitions because they have different required parameters. Required parameters are specified on the first line of the definition. Optional options are listed after OO, and optional positional args are listed after OP. This data is used to generate corresponding command definition structures for lvm in command-lines.h. usage/help output is also auto generated, so it is always in sync with the definitions. Every user-entered command is compared against the set of command structures, and matched with one. An error is reported if an entered command does not have the required parameters for any definition. The closest match is printed as a suggestion, and running lvresize --help will display the usage for each possible lvresize command. The prototype syntax used for help/man output includes required --option and positional args on the first line, and optional --option and positional args enclosed in [ ] on subsequent lines. command_name <required_opt_args> <required_pos_args> [ <optional_opt_args> ] [ <optional_pos_args> ] Command definitions that are not to be advertised/suggested have the flag SECONDARY_SYNTAX. These commands will not be printed in the normal help output. Man page prototypes are also generated from the same original command definitions, and are always in sync with the code and help text. Very early in command execution, a matching command definition is found. lvm then knows the operation being done, and that the provided args conform to the definition. This will allow lots of ad hoc checking/validation to be removed throughout the code. Each command definition can also be routed to a specific function to implement it. The function is associated with an enum value for the command definition (generated from the ID string.) These per-command-definition implementation functions have not yet been created, so all commands currently fall back to the existing per-command-name implementation functions. Using per-command-definition functions will allow lots of code to be removed which tries to figure out what the command is meant to do. This is currently based on ad hoc and complicated option analysis. When using the new functions, what the command is doing is already known from the associated command definition.
2016-08-12 23:52:18 +03:00
*
man: use Size variable for a number with unit Define a separate variable type Size to represent a number that takes an optional UNIT.
2017-02-24 22:44:05 +03:00
* Size is a Number that takes an optional unit.
* A full usage could be "Size[b|B|s|S|k|K|m|M|g|G|t|T|p|P|e|E]"
* but repeating this full specification produces long and
* cluttered output, and doesn't indicate which unit is the default.
* "Size[Units]" would be cleaner, as would a subset of
* common units, e.g. "Size[kmg...]", but neither helps
* with default. "Size[k|UNIT]" and "Size[m|UNIT]" show
man/help: change syntax to UNIT (Change to recent commit 3f4ecaf8c2.) Use --foo Number[k|UNIT] to indicate that the default units of the number is k, but other units listed below are also accepted. Previously, underlined/italic Unit was used, like other of variables, but this UNIT is more like a shortcut than an actual variable.
2017-02-23 23:24:28 +03:00
* the default, and "UNIT" indicates that other units
commands: new method for defining commands . Define a prototype for every lvm command. . Match every user command with one definition. . Generate help text and man pages from them. The new file command-lines.in defines a prototype for every unique lvm command. A unique lvm command is a unique combination of: command name + required option args + required positional args. Each of these prototypes also includes the optional option args and optional positional args that the command will accept, a description, and a unique string ID for the definition. Any valid command will match one of the prototypes. Here's an example of the lvresize command definitions from command-lines.in, there are three unique lvresize commands: lvresize --size SizeMB LV OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB, --poolmetadatasize SizeMB OP: PV ... ID: lvresize_by_size DESC: Resize an LV by a specified size. lvresize LV PV ... OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB ID: lvresize_by_pv DESC: Resize an LV by specified PV extents. FLAGS: SECONDARY_SYNTAX lvresize --poolmetadatasize SizeMB LV_thinpool OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --stripes Number, --stripesize SizeKB OP: PV ... ID: lvresize_pool_metadata_by_size DESC: Resize a pool metadata SubLV by a specified size. The three commands have separate definitions because they have different required parameters. Required parameters are specified on the first line of the definition. Optional options are listed after OO, and optional positional args are listed after OP. This data is used to generate corresponding command definition structures for lvm in command-lines.h. usage/help output is also auto generated, so it is always in sync with the definitions. Every user-entered command is compared against the set of command structures, and matched with one. An error is reported if an entered command does not have the required parameters for any definition. The closest match is printed as a suggestion, and running lvresize --help will display the usage for each possible lvresize command. The prototype syntax used for help/man output includes required --option and positional args on the first line, and optional --option and positional args enclosed in [ ] on subsequent lines. command_name <required_opt_args> <required_pos_args> [ <optional_opt_args> ] [ <optional_pos_args> ] Command definitions that are not to be advertised/suggested have the flag SECONDARY_SYNTAX. These commands will not be printed in the normal help output. Man page prototypes are also generated from the same original command definitions, and are always in sync with the code and help text. Very early in command execution, a matching command definition is found. lvm then knows the operation being done, and that the provided args conform to the definition. This will allow lots of ad hoc checking/validation to be removed throughout the code. Each command definition can also be routed to a specific function to implement it. The function is associated with an enum value for the command definition (generated from the ID string.) These per-command-definition implementation functions have not yet been created, so all commands currently fall back to the existing per-command-name implementation functions. Using per-command-definition functions will allow lots of code to be removed which tries to figure out what the command is meant to do. This is currently based on ad hoc and complicated option analysis. When using the new functions, what the command is doing is already known from the associated command definition.
2016-08-12 23:52:18 +03:00
* are possible without listing them all. This also
* suggests using the preferred lower case letters, because
* --size and other option args treat upper/lower letters
* the same, all as 1024 SI base. For this reason, we
* should avoid suggesting the upper case letters.
*/
val(none_VAL, NULL, "None", "ERR") /* unused, for enum value 0 */
val(bool_VAL, yes_no_arg, "Bool", "y|n")
val(number_VAL, int_arg, "Number", NULL)
commands: use correct relative signs with mirror option As was recently done with relative signes for sizes/extents, limit the signs used with the mirrors option, e.g. lvcreate --mirrors now does not accept or advertise an optional minus sign with the value. lvconvert --mirrors accepts +|-.
2017-03-11 00:22:13 +03:00
val(snumber_VAL, int_arg_with_sign, "SNumber", "[+|-]Number")
val(pnumber_VAL, int_arg_with_plus, "PNumber", "[+]Number")
args: use uint32 arg for maxphysicalvolumes
2017-01-04 00:52:27 +03:00
val(uint32_VAL, uint32_arg, "Uint32", "Number")
commands: new method for defining commands . Define a prototype for every lvm command. . Match every user command with one definition. . Generate help text and man pages from them. The new file command-lines.in defines a prototype for every unique lvm command. A unique lvm command is a unique combination of: command name + required option args + required positional args. Each of these prototypes also includes the optional option args and optional positional args that the command will accept, a description, and a unique string ID for the definition. Any valid command will match one of the prototypes. Here's an example of the lvresize command definitions from command-lines.in, there are three unique lvresize commands: lvresize --size SizeMB LV OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB, --poolmetadatasize SizeMB OP: PV ... ID: lvresize_by_size DESC: Resize an LV by a specified size. lvresize LV PV ... OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB ID: lvresize_by_pv DESC: Resize an LV by specified PV extents. FLAGS: SECONDARY_SYNTAX lvresize --poolmetadatasize SizeMB LV_thinpool OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --stripes Number, --stripesize SizeKB OP: PV ... ID: lvresize_pool_metadata_by_size DESC: Resize a pool metadata SubLV by a specified size. The three commands have separate definitions because they have different required parameters. Required parameters are specified on the first line of the definition. Optional options are listed after OO, and optional positional args are listed after OP. This data is used to generate corresponding command definition structures for lvm in command-lines.h. usage/help output is also auto generated, so it is always in sync with the definitions. Every user-entered command is compared against the set of command structures, and matched with one. An error is reported if an entered command does not have the required parameters for any definition. The closest match is printed as a suggestion, and running lvresize --help will display the usage for each possible lvresize command. The prototype syntax used for help/man output includes required --option and positional args on the first line, and optional --option and positional args enclosed in [ ] on subsequent lines. command_name <required_opt_args> <required_pos_args> [ <optional_opt_args> ] [ <optional_pos_args> ] Command definitions that are not to be advertised/suggested have the flag SECONDARY_SYNTAX. These commands will not be printed in the normal help output. Man page prototypes are also generated from the same original command definitions, and are always in sync with the code and help text. Very early in command execution, a matching command definition is found. lvm then knows the operation being done, and that the provided args conform to the definition. This will allow lots of ad hoc checking/validation to be removed throughout the code. Each command definition can also be routed to a specific function to implement it. The function is associated with an enum value for the command definition (generated from the ID string.) These per-command-definition implementation functions have not yet been created, so all commands currently fall back to the existing per-command-name implementation functions. Using per-command-definition functions will allow lots of code to be removed which tries to figure out what the command is meant to do. This is currently based on ad hoc and complicated option analysis. When using the new functions, what the command is doing is already known from the associated command definition.
2016-08-12 23:52:18 +03:00
val(string_VAL, string_arg, "String", NULL)
val(vg_VAL, string_arg, "VG", NULL)
val(lv_VAL, string_arg, "LV", NULL)
val(pv_VAL, string_arg, "PV", NULL)
val(tag_VAL, tag_arg, "Tag", NULL)
val(select_VAL, NULL, "Select", NULL) /* used only for command defs */
val(activationmode_VAL, string_arg, "ActivationMode", "partial|degraded|complete")
val(activation_VAL, activation_arg, "Active", "y|n|ay")
cache: allow to specify cachemetadataformat OO_LVCREATE_CACHE accepts --cachemetadataformat. Support new option --cachemetadataformat auto|1|2 for caching. Word 'auto' can be also be given as '0'.
2017-03-03 13:33:10 +03:00
val(cachemetadataformat_VAL, cachemetadataformat_arg, "CacheMetadataFormat", "auto|1|2")
args: in cachemode option fix passthrough value
2017-03-03 19:53:18 +03:00
val(cachemode_VAL, cachemode_arg, "CacheMode", "writethrough|writeback|passthrough")
commands: new method for defining commands . Define a prototype for every lvm command. . Match every user command with one definition. . Generate help text and man pages from them. The new file command-lines.in defines a prototype for every unique lvm command. A unique lvm command is a unique combination of: command name + required option args + required positional args. Each of these prototypes also includes the optional option args and optional positional args that the command will accept, a description, and a unique string ID for the definition. Any valid command will match one of the prototypes. Here's an example of the lvresize command definitions from command-lines.in, there are three unique lvresize commands: lvresize --size SizeMB LV OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB, --poolmetadatasize SizeMB OP: PV ... ID: lvresize_by_size DESC: Resize an LV by a specified size. lvresize LV PV ... OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB ID: lvresize_by_pv DESC: Resize an LV by specified PV extents. FLAGS: SECONDARY_SYNTAX lvresize --poolmetadatasize SizeMB LV_thinpool OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --stripes Number, --stripesize SizeKB OP: PV ... ID: lvresize_pool_metadata_by_size DESC: Resize a pool metadata SubLV by a specified size. The three commands have separate definitions because they have different required parameters. Required parameters are specified on the first line of the definition. Optional options are listed after OO, and optional positional args are listed after OP. This data is used to generate corresponding command definition structures for lvm in command-lines.h. usage/help output is also auto generated, so it is always in sync with the definitions. Every user-entered command is compared against the set of command structures, and matched with one. An error is reported if an entered command does not have the required parameters for any definition. The closest match is printed as a suggestion, and running lvresize --help will display the usage for each possible lvresize command. The prototype syntax used for help/man output includes required --option and positional args on the first line, and optional --option and positional args enclosed in [ ] on subsequent lines. command_name <required_opt_args> <required_pos_args> [ <optional_opt_args> ] [ <optional_pos_args> ] Command definitions that are not to be advertised/suggested have the flag SECONDARY_SYNTAX. These commands will not be printed in the normal help output. Man page prototypes are also generated from the same original command definitions, and are always in sync with the code and help text. Very early in command execution, a matching command definition is found. lvm then knows the operation being done, and that the provided args conform to the definition. This will allow lots of ad hoc checking/validation to be removed throughout the code. Each command definition can also be routed to a specific function to implement it. The function is associated with an enum value for the command definition (generated from the ID string.) These per-command-definition implementation functions have not yet been created, so all commands currently fall back to the existing per-command-name implementation functions. Using per-command-definition functions will allow lots of code to be removed which tries to figure out what the command is meant to do. This is currently based on ad hoc and complicated option analysis. When using the new functions, what the command is doing is already known from the associated command definition.
2016-08-12 23:52:18 +03:00
val(discards_VAL, discards_arg, "Discards", "passdown|nopassdown|ignore")
val(mirrorlog_VAL, mirrorlog_arg, "MirrorLog", "core|disk")
man: use Size variable for a number with unit Define a separate variable type Size to represent a number that takes an optional UNIT.
2017-02-24 22:44:05 +03:00
val(sizekb_VAL, size_kb_arg, "SizeKB", "Size[k|UNIT]")
lvcreate/lvresize: the --size option accepts signed values There was confusion in the code about whether or not the --size option accepted a sign. Make it consistent and clear that it does. This exposes a new problem in that an option can only accept one value type, e.g. --size can only accept a signed number, it cannot accept a positive or negative number for some commands and reject negative numbers for others. In practice, lvcreate accepts only positive --size values and lvresize accepts positive or negative --size values. There is currently no way to encode this difference. Until that is fixed, the man page output is hacked to avoid printing the [+|-] prefix for sizes in lvcreate.
2017-03-02 21:53:01 +03:00
val(ssizekb_VAL, ssize_kb_arg, "SSizeKB", "[+|-]Size[k|UNIT]")
commands: clean up and unify signed option value handling Add new values for different sign variations, resulting in: size_VAL no sign accepted ssize_VAL accepts + or - psize_VAL accepts + nsize_VAL accpets - extents_VAL no sign accepted sextents_VAL accepts + or - pextents_VAL accepts + nextents_VAL accepts - Depending on the command being run, change the option values for --size, --extents, --poolmetadatasize to use the appropriate value from above. lvcreate uses no sign (but accepts + and ignores it). lvresize accepts +|- for a relative change. lvextend accepts + for a relative change. lvreduce accepts - for a relative change.
2017-03-08 01:55:07 +03:00
val(sizemb_VAL, size_mb_arg, "SizeMB", "Size[m|UNIT]")
lvcreate/lvresize: the --size option accepts signed values There was confusion in the code about whether or not the --size option accepted a sign. Make it consistent and clear that it does. This exposes a new problem in that an option can only accept one value type, e.g. --size can only accept a signed number, it cannot accept a positive or negative number for some commands and reject negative numbers for others. In practice, lvcreate accepts only positive --size values and lvresize accepts positive or negative --size values. There is currently no way to encode this difference. Until that is fixed, the man page output is hacked to avoid printing the [+|-] prefix for sizes in lvcreate.
2017-03-02 21:53:01 +03:00
val(ssizemb_VAL, ssize_mb_arg, "SSizeMB", "[+|-]Size[m|UNIT]")
commands: clean up and unify signed option value handling Add new values for different sign variations, resulting in: size_VAL no sign accepted ssize_VAL accepts + or - psize_VAL accepts + nsize_VAL accpets - extents_VAL no sign accepted sextents_VAL accepts + or - pextents_VAL accepts + nextents_VAL accepts - Depending on the command being run, change the option values for --size, --extents, --poolmetadatasize to use the appropriate value from above. lvcreate uses no sign (but accepts + and ignores it). lvresize accepts +|- for a relative change. lvextend accepts + for a relative change. lvreduce accepts - for a relative change.
2017-03-08 01:55:07 +03:00
val(psizemb_VAL, psize_mb_arg, "PSizeMB", "[+]Size[m|UNIT]")
val(nsizemb_VAL, nsize_mb_arg, "NSizeMB", "[-]Size[m|UNIT]")
cleanup: add _mb_ to regiosize option Just like with others mentions default unit in function name.
2018-04-18 13:56:32 +03:00
val(regionsizemb_VAL, regionsize_mb_arg, "RegionSize", "Size[m|UNIT]")
commands: clean up and unify signed option value handling Add new values for different sign variations, resulting in: size_VAL no sign accepted ssize_VAL accepts + or - psize_VAL accepts + nsize_VAL accpets - extents_VAL no sign accepted sextents_VAL accepts + or - pextents_VAL accepts + nextents_VAL accepts - Depending on the command being run, change the option values for --size, --extents, --poolmetadatasize to use the appropriate value from above. lvcreate uses no sign (but accepts + and ignores it). lvresize accepts +|- for a relative change. lvextend accepts + for a relative change. lvreduce accepts - for a relative change.
2017-03-08 01:55:07 +03:00
val(extents_VAL, extents_arg, "Extents", "Number[PERCENT]")
val(sextents_VAL, sextents_arg, "SExtents", "[+|-]Number[PERCENT]")
val(pextents_VAL, pextents_arg, "PExtents", "[+]Number[PERCENT]")
val(nextents_VAL, nextents_arg, "NExtents", "[-]Number[PERCENT]")
commands: new method for defining commands . Define a prototype for every lvm command. . Match every user command with one definition. . Generate help text and man pages from them. The new file command-lines.in defines a prototype for every unique lvm command. A unique lvm command is a unique combination of: command name + required option args + required positional args. Each of these prototypes also includes the optional option args and optional positional args that the command will accept, a description, and a unique string ID for the definition. Any valid command will match one of the prototypes. Here's an example of the lvresize command definitions from command-lines.in, there are three unique lvresize commands: lvresize --size SizeMB LV OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB, --poolmetadatasize SizeMB OP: PV ... ID: lvresize_by_size DESC: Resize an LV by a specified size. lvresize LV PV ... OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB ID: lvresize_by_pv DESC: Resize an LV by specified PV extents. FLAGS: SECONDARY_SYNTAX lvresize --poolmetadatasize SizeMB LV_thinpool OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --stripes Number, --stripesize SizeKB OP: PV ... ID: lvresize_pool_metadata_by_size DESC: Resize a pool metadata SubLV by a specified size. The three commands have separate definitions because they have different required parameters. Required parameters are specified on the first line of the definition. Optional options are listed after OO, and optional positional args are listed after OP. This data is used to generate corresponding command definition structures for lvm in command-lines.h. usage/help output is also auto generated, so it is always in sync with the definitions. Every user-entered command is compared against the set of command structures, and matched with one. An error is reported if an entered command does not have the required parameters for any definition. The closest match is printed as a suggestion, and running lvresize --help will display the usage for each possible lvresize command. The prototype syntax used for help/man output includes required --option and positional args on the first line, and optional --option and positional args enclosed in [ ] on subsequent lines. command_name <required_opt_args> <required_pos_args> [ <optional_opt_args> ] [ <optional_pos_args> ] Command definitions that are not to be advertised/suggested have the flag SECONDARY_SYNTAX. These commands will not be printed in the normal help output. Man page prototypes are also generated from the same original command definitions, and are always in sync with the code and help text. Very early in command execution, a matching command definition is found. lvm then knows the operation being done, and that the provided args conform to the definition. This will allow lots of ad hoc checking/validation to be removed throughout the code. Each command definition can also be routed to a specific function to implement it. The function is associated with an enum value for the command definition (generated from the ID string.) These per-command-definition implementation functions have not yet been created, so all commands currently fall back to the existing per-command-name implementation functions. Using per-command-definition functions will allow lots of code to be removed which tries to figure out what the command is meant to do. This is currently based on ad hoc and complicated option analysis. When using the new functions, what the command is doing is already known from the associated command definition.
2016-08-12 23:52:18 +03:00
val(permission_VAL, permission_arg, "Permission", "rw|r")
Remove lvm1 and pool disk formats There are likely more bits of code that can be removed, e.g. lvm1/pool-specific bits of code that were identified using FMT flags. The vgconvert command can likely be reduced further. The lvm1-specific config settings should probably have some other fields set for proper deprecation.
2018-04-28 00:22:46 +03:00
val(metadatatype_VAL, metadatatype_arg, "MetadataType", "lvm2")
tools: correct units description Option --units takes also [Number] to express size in configurable units.
2021-04-16 22:29:10 +03:00
val(units_VAL, string_arg, "Units", "[Number]r|R|h|H|b|B|s|S|k|K|m|M|g|G|t|T|p|P|e|E")
man: writecache missed for --type Add missing writecache type into man pages.
2021-03-30 12:22:27 +03:00
val(segtype_VAL, segtype_arg, "SegType", "linear|striped|snapshot|raid|mirror|thin|thin-pool|vdo|vdo-pool|cache|cache-pool|writecache")
commands: new method for defining commands . Define a prototype for every lvm command. . Match every user command with one definition. . Generate help text and man pages from them. The new file command-lines.in defines a prototype for every unique lvm command. A unique lvm command is a unique combination of: command name + required option args + required positional args. Each of these prototypes also includes the optional option args and optional positional args that the command will accept, a description, and a unique string ID for the definition. Any valid command will match one of the prototypes. Here's an example of the lvresize command definitions from command-lines.in, there are three unique lvresize commands: lvresize --size SizeMB LV OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB, --poolmetadatasize SizeMB OP: PV ... ID: lvresize_by_size DESC: Resize an LV by a specified size. lvresize LV PV ... OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB ID: lvresize_by_pv DESC: Resize an LV by specified PV extents. FLAGS: SECONDARY_SYNTAX lvresize --poolmetadatasize SizeMB LV_thinpool OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --stripes Number, --stripesize SizeKB OP: PV ... ID: lvresize_pool_metadata_by_size DESC: Resize a pool metadata SubLV by a specified size. The three commands have separate definitions because they have different required parameters. Required parameters are specified on the first line of the definition. Optional options are listed after OO, and optional positional args are listed after OP. This data is used to generate corresponding command definition structures for lvm in command-lines.h. usage/help output is also auto generated, so it is always in sync with the definitions. Every user-entered command is compared against the set of command structures, and matched with one. An error is reported if an entered command does not have the required parameters for any definition. The closest match is printed as a suggestion, and running lvresize --help will display the usage for each possible lvresize command. The prototype syntax used for help/man output includes required --option and positional args on the first line, and optional --option and positional args enclosed in [ ] on subsequent lines. command_name <required_opt_args> <required_pos_args> [ <optional_opt_args> ] [ <optional_pos_args> ] Command definitions that are not to be advertised/suggested have the flag SECONDARY_SYNTAX. These commands will not be printed in the normal help output. Man page prototypes are also generated from the same original command definitions, and are always in sync with the code and help text. Very early in command execution, a matching command definition is found. lvm then knows the operation being done, and that the provided args conform to the definition. This will allow lots of ad hoc checking/validation to be removed throughout the code. Each command definition can also be routed to a specific function to implement it. The function is associated with an enum value for the command definition (generated from the ID string.) These per-command-definition implementation functions have not yet been created, so all commands currently fall back to the existing per-command-name implementation functions. Using per-command-definition functions will allow lots of code to be removed which tries to figure out what the command is meant to do. This is currently based on ad hoc and complicated option analysis. When using the new functions, what the command is doing is already known from the associated command definition.
2016-08-12 23:52:18 +03:00
val(alloc_VAL, alloc_arg, "Alloc", "contiguous|cling|cling_by_tags|normal|anywhere|inherit")
val(locktype_VAL, locktype_arg, "LockType", "sanlock|dlm|none")
man/help: rework extents and size output Clean up and correct the details around --extents and --size. lvcreate/lvresize/lvreduce/lvextend all now display the extents option in usages. The Size and Number value variables for --size and --extents are now displayed without the [+|-] prefix for lvcreate.
2017-03-03 23:21:36 +03:00
val(readahead_VAL, readahead_arg, "Readahead", "auto|none|Number")
commands: new method for defining commands . Define a prototype for every lvm command. . Match every user command with one definition. . Generate help text and man pages from them. The new file command-lines.in defines a prototype for every unique lvm command. A unique lvm command is a unique combination of: command name + required option args + required positional args. Each of these prototypes also includes the optional option args and optional positional args that the command will accept, a description, and a unique string ID for the definition. Any valid command will match one of the prototypes. Here's an example of the lvresize command definitions from command-lines.in, there are three unique lvresize commands: lvresize --size SizeMB LV OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB, --poolmetadatasize SizeMB OP: PV ... ID: lvresize_by_size DESC: Resize an LV by a specified size. lvresize LV PV ... OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB ID: lvresize_by_pv DESC: Resize an LV by specified PV extents. FLAGS: SECONDARY_SYNTAX lvresize --poolmetadatasize SizeMB LV_thinpool OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --stripes Number, --stripesize SizeKB OP: PV ... ID: lvresize_pool_metadata_by_size DESC: Resize a pool metadata SubLV by a specified size. The three commands have separate definitions because they have different required parameters. Required parameters are specified on the first line of the definition. Optional options are listed after OO, and optional positional args are listed after OP. This data is used to generate corresponding command definition structures for lvm in command-lines.h. usage/help output is also auto generated, so it is always in sync with the definitions. Every user-entered command is compared against the set of command structures, and matched with one. An error is reported if an entered command does not have the required parameters for any definition. The closest match is printed as a suggestion, and running lvresize --help will display the usage for each possible lvresize command. The prototype syntax used for help/man output includes required --option and positional args on the first line, and optional --option and positional args enclosed in [ ] on subsequent lines. command_name <required_opt_args> <required_pos_args> [ <optional_opt_args> ] [ <optional_pos_args> ] Command definitions that are not to be advertised/suggested have the flag SECONDARY_SYNTAX. These commands will not be printed in the normal help output. Man page prototypes are also generated from the same original command definitions, and are always in sync with the code and help text. Very early in command execution, a matching command definition is found. lvm then knows the operation being done, and that the provided args conform to the definition. This will allow lots of ad hoc checking/validation to be removed throughout the code. Each command definition can also be routed to a specific function to implement it. The function is associated with an enum value for the command definition (generated from the ID string.) These per-command-definition implementation functions have not yet been created, so all commands currently fall back to the existing per-command-name implementation functions. Using per-command-definition functions will allow lots of code to be removed which tries to figure out what the command is meant to do. This is currently based on ad hoc and complicated option analysis. When using the new functions, what the command is doing is already known from the associated command definition.
2016-08-12 23:52:18 +03:00
val(vgmetadatacopies_VAL, vgmetadatacopies_arg, "MetadataCopiesVG", "all|unmanaged|Number")
val(pvmetadatacopies_VAL, pvmetadatacopies_arg, "MetadataCopiesPV", "0|1|2")
val(metadatacopies_VAL, metadatacopies_arg, "unused", "unused")
val(polloperation_VAL, polloperation_arg, "PollOp", "pvmove|convert|merge|merge_thin")
val(writemostly_VAL, writemostly_arg, "WriteMostlyPV", "PV[:t|n|y]")
val(syncaction_VAL, syncaction_arg, "SyncAction", "check|repair")
args: recognize 'json_std' for --reportformat cmd line arg
2022-08-04 17:50:01 +03:00
val(reportformat_VAL, reportformat_arg, "ReportFmt", "basic|json|json_std")
commands: new method for defining commands . Define a prototype for every lvm command. . Match every user command with one definition. . Generate help text and man pages from them. The new file command-lines.in defines a prototype for every unique lvm command. A unique lvm command is a unique combination of: command name + required option args + required positional args. Each of these prototypes also includes the optional option args and optional positional args that the command will accept, a description, and a unique string ID for the definition. Any valid command will match one of the prototypes. Here's an example of the lvresize command definitions from command-lines.in, there are three unique lvresize commands: lvresize --size SizeMB LV OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB, --poolmetadatasize SizeMB OP: PV ... ID: lvresize_by_size DESC: Resize an LV by a specified size. lvresize LV PV ... OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB ID: lvresize_by_pv DESC: Resize an LV by specified PV extents. FLAGS: SECONDARY_SYNTAX lvresize --poolmetadatasize SizeMB LV_thinpool OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --stripes Number, --stripesize SizeKB OP: PV ... ID: lvresize_pool_metadata_by_size DESC: Resize a pool metadata SubLV by a specified size. The three commands have separate definitions because they have different required parameters. Required parameters are specified on the first line of the definition. Optional options are listed after OO, and optional positional args are listed after OP. This data is used to generate corresponding command definition structures for lvm in command-lines.h. usage/help output is also auto generated, so it is always in sync with the definitions. Every user-entered command is compared against the set of command structures, and matched with one. An error is reported if an entered command does not have the required parameters for any definition. The closest match is printed as a suggestion, and running lvresize --help will display the usage for each possible lvresize command. The prototype syntax used for help/man output includes required --option and positional args on the first line, and optional --option and positional args enclosed in [ ] on subsequent lines. command_name <required_opt_args> <required_pos_args> [ <optional_opt_args> ] [ <optional_pos_args> ] Command definitions that are not to be advertised/suggested have the flag SECONDARY_SYNTAX. These commands will not be printed in the normal help output. Man page prototypes are also generated from the same original command definitions, and are always in sync with the code and help text. Very early in command execution, a matching command definition is found. lvm then knows the operation being done, and that the provided args conform to the definition. This will allow lots of ad hoc checking/validation to be removed throughout the code. Each command definition can also be routed to a specific function to implement it. The function is associated with an enum value for the command definition (generated from the ID string.) These per-command-definition implementation functions have not yet been created, so all commands currently fall back to the existing per-command-name implementation functions. Using per-command-definition functions will allow lots of code to be removed which tries to figure out what the command is meant to do. This is currently based on ad hoc and complicated option analysis. When using the new functions, what the command is doing is already known from the associated command definition.
2016-08-12 23:52:18 +03:00
val(configreport_VAL, configreport_arg, "ConfigReport", "log|vg|lv|pv|pvseg|seg")
val(configtype_VAL, configtype_arg, "ConfigType", "current|default|diff|full|list|missing|new|profilable|profilable-command|profilable-metadata")
pvck: repair headers and metadata To write a new/repaired pv_header and label_header: pvck --repairtype pv_header --file <file> <device> This uses the metadata input file to find the PV UUID, device size, and data offset. To write new/repaired metadata text and mda_header: pvck --repairtype metadata --file <file> <device> This requires a good pv_header which points to one or two metadata areas. Any metadata areas referenced by the pv_header are updated with the specified metadata and a new mda_header. "--settings mda_num=1|2" can be used to select one mda to repair. To combine all header and metadata repairs: pvck --repair --file <file> <device> It's best to use a raw metadata file as input, that was extracted from another PV in the same VG (or from another metadata area on the same PV.) pvck will also accept a metadata backup file, but that will produce metadata that is not identical to other metadata copies on other PVs and other areas. So, when using a backup file, consider using it to update metadata on all PVs/areas. To get a raw metadata file to use for the repair, see pvck --dump metadata|metadata_search. List all instances of metadata from the metadata area: pvck --dump metadata_search <device> Save one instance of metadata at the given offset to the specified file (this file can be used for repair): pvck --dump metadata_search --file <file> --settings "metadata_offset=<off>" <device>
2019-10-30 00:08:43 +03:00
val(repairtype_VAL, repairtype_arg, "RepairType", "pv_header|metadata|label_header")
Revert "pvck: dump headers_only to skip metadata text" This reverts commit 5410dd5441aa827b381ff64dfc6be6e4589d87a1. Accidental push.
2020-05-29 21:26:43 +03:00
val(dumptype_VAL, dumptype_arg, "DumpType", "headers|metadata|metadata_all|metadata_search")
report: support printing full column names in report headings Reuse existing report/headings config setting to make it possible to change the type of headings to display: 0 - no headings 1 - column name abbreviations (default and original functionality) 2 - full column names (column names are equal to exact names that -o|--options also accepts to set report output) Also, add '--headings none|abbrev|full|0|1|2' command line option so we are able to select the heading type for each LVM reporting command directly.
2023-08-22 11:54:35 +03:00
val(headings_VAL, headings_arg, "HeadingsType", "none|abbrev|full|0|1|2")
command: reorder vals order Keep most frequently used val names in front.
2024-05-22 18:15:34 +03:00
val(conststr_VAL, NULL, "ConstString", "ERR") /* used only for command defs */
val(constnum_VAL, NULL, "ConstNumber", "ERR") /* used only for command defs */
commands: new method for defining commands . Define a prototype for every lvm command. . Match every user command with one definition. . Generate help text and man pages from them. The new file command-lines.in defines a prototype for every unique lvm command. A unique lvm command is a unique combination of: command name + required option args + required positional args. Each of these prototypes also includes the optional option args and optional positional args that the command will accept, a description, and a unique string ID for the definition. Any valid command will match one of the prototypes. Here's an example of the lvresize command definitions from command-lines.in, there are three unique lvresize commands: lvresize --size SizeMB LV OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB, --poolmetadatasize SizeMB OP: PV ... ID: lvresize_by_size DESC: Resize an LV by a specified size. lvresize LV PV ... OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB ID: lvresize_by_pv DESC: Resize an LV by specified PV extents. FLAGS: SECONDARY_SYNTAX lvresize --poolmetadatasize SizeMB LV_thinpool OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --stripes Number, --stripesize SizeKB OP: PV ... ID: lvresize_pool_metadata_by_size DESC: Resize a pool metadata SubLV by a specified size. The three commands have separate definitions because they have different required parameters. Required parameters are specified on the first line of the definition. Optional options are listed after OO, and optional positional args are listed after OP. This data is used to generate corresponding command definition structures for lvm in command-lines.h. usage/help output is also auto generated, so it is always in sync with the definitions. Every user-entered command is compared against the set of command structures, and matched with one. An error is reported if an entered command does not have the required parameters for any definition. The closest match is printed as a suggestion, and running lvresize --help will display the usage for each possible lvresize command. The prototype syntax used for help/man output includes required --option and positional args on the first line, and optional --option and positional args enclosed in [ ] on subsequent lines. command_name <required_opt_args> <required_pos_args> [ <optional_opt_args> ] [ <optional_pos_args> ] Command definitions that are not to be advertised/suggested have the flag SECONDARY_SYNTAX. These commands will not be printed in the normal help output. Man page prototypes are also generated from the same original command definitions, and are always in sync with the code and help text. Very early in command execution, a matching command definition is found. lvm then knows the operation being done, and that the provided args conform to the definition. This will allow lots of ad hoc checking/validation to be removed throughout the code. Each command definition can also be routed to a specific function to implement it. The function is associated with an enum value for the command definition (generated from the ID string.) These per-command-definition implementation functions have not yet been created, so all commands currently fall back to the existing per-command-name implementation functions. Using per-command-definition functions will allow lots of code to be removed which tries to figure out what the command is meant to do. This is currently based on ad hoc and complicated option analysis. When using the new functions, what the command is doing is already known from the associated command definition.
2016-08-12 23:52:18 +03:00
/* this should always be last */
command: embedding strings to structs Since we will make these struct const, we can also embedding string content into them to avoid unnecessary pointer relocations.
2024-05-01 13:45:10 +03:00
val(VAL_COUNT, NULL, "", NULL)
commands: new method for defining commands . Define a prototype for every lvm command. . Match every user command with one definition. . Generate help text and man pages from them. The new file command-lines.in defines a prototype for every unique lvm command. A unique lvm command is a unique combination of: command name + required option args + required positional args. Each of these prototypes also includes the optional option args and optional positional args that the command will accept, a description, and a unique string ID for the definition. Any valid command will match one of the prototypes. Here's an example of the lvresize command definitions from command-lines.in, there are three unique lvresize commands: lvresize --size SizeMB LV OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB, --poolmetadatasize SizeMB OP: PV ... ID: lvresize_by_size DESC: Resize an LV by a specified size. lvresize LV PV ... OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --resizefs, --stripes Number, --stripesize SizeKB ID: lvresize_by_pv DESC: Resize an LV by specified PV extents. FLAGS: SECONDARY_SYNTAX lvresize --poolmetadatasize SizeMB LV_thinpool OO: --alloc Alloc, --autobackup Bool, --force, --nofsck, --nosync, --noudevsync, --reportformat String, --stripes Number, --stripesize SizeKB OP: PV ... ID: lvresize_pool_metadata_by_size DESC: Resize a pool metadata SubLV by a specified size. The three commands have separate definitions because they have different required parameters. Required parameters are specified on the first line of the definition. Optional options are listed after OO, and optional positional args are listed after OP. This data is used to generate corresponding command definition structures for lvm in command-lines.h. usage/help output is also auto generated, so it is always in sync with the definitions. Every user-entered command is compared against the set of command structures, and matched with one. An error is reported if an entered command does not have the required parameters for any definition. The closest match is printed as a suggestion, and running lvresize --help will display the usage for each possible lvresize command. The prototype syntax used for help/man output includes required --option and positional args on the first line, and optional --option and positional args enclosed in [ ] on subsequent lines. command_name <required_opt_args> <required_pos_args> [ <optional_opt_args> ] [ <optional_pos_args> ] Command definitions that are not to be advertised/suggested have the flag SECONDARY_SYNTAX. These commands will not be printed in the normal help output. Man page prototypes are also generated from the same original command definitions, and are always in sync with the code and help text. Very early in command execution, a matching command definition is found. lvm then knows the operation being done, and that the provided args conform to the definition. This will allow lots of ad hoc checking/validation to be removed throughout the code. Each command definition can also be routed to a specific function to implement it. The function is associated with an enum value for the command definition (generated from the ID string.) These per-command-definition implementation functions have not yet been created, so all commands currently fall back to the existing per-command-name implementation functions. Using per-command-definition functions will allow lots of code to be removed which tries to figure out what the command is meant to do. This is currently based on ad hoc and complicated option analysis. When using the new functions, what the command is doing is already known from the associated command definition.
2016-08-12 23:52:18 +03:00
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