thin_metadata_size: support short/long --numeric-only options; man page adjustment; change long output; stremaline
This commit is contained in:
Heinz Mauelshagen
parent
175c70ecf2
commit
3ee6985bbc
@ -27,12 +27,12 @@ Maximum sum of all thin provisioned devices and snapshots.
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Unit identifier supported to allow for convenient entry of large quantities, eg. 1000000 = 1M.
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Default is absolut quantity without a number unit specifier.
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.IP "\fB\-u, \-\-unit\fP \fI[bskKmMgGtTpPeEzZyY]\fP"
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.IP "\fB\-u, \-\-unit\fP \fI{bskKmMgGtTpPeEzZyY}\fP"
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Output unit specifier in units of bytes,sectors,kilobytes,kibibytes,... respectively.
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Default is in sectors without an output unit specifier.
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.IP "\fB\-n[u], \-\-numeric-only[=unit]\fP"
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Limit output to just the size number with the optional unit specifier character.
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.IP "\fB\-n, \-\-numeric-only [short|long]\fP"
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Limit output to just the size number with the optional unit specifier character/string.
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.IP "\fB\-h, \-\-help\fP"
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Print help and exit.
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@ -43,18 +43,22 @@ Output version information and exit.
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.SH EXAMPLES
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Calculates the thin privisioning metadata device size for block size 64 kilobytes,
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pool size 1 terabytes and maximum number of thin provisioned devices and snapshots of 1000
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in units of sectors with long output.
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in units of sectors with long output:
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.sp
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.B thin_metadata_size -b64k -s1t -m1000
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Or (using the long options inmstead) for block size 1 gigabyte, pool size 1 petabytes and maximum number of thin provisioned devices
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and snapshots of 1 million in units of gigabytes with numeric only output.
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Or (using the long options instead) for block size 1 gigabyte, pool size 1 petabytes and maximum number of thin provisioned devices
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and snapshots of 1 million with numeric only output in units of gigabytes:
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.sp
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.B thin_metadata_size --block-size=1g --pool-size=1p --max-thins=1M --unit=g --numeric-only
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Same as before (1g,1p,1M,numeric-only) but with unit specifier character appended.
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Same as before (1g,1p,1M,numeric-only) but with unit specifier character appended:
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.sp
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.B thin_metadata_size --block-size=1g --pool-size=1p --max-thins=1M --unit=g --numeric-only=unit
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.B thin_metadata_size --block-size=1giga --pool-size=1petabytes --max-thins=1mebi --unit=g --numeric-only=short
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Or with unit specifier string appended:
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.sp
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.B thin_metadata_size --block-size=1giga --pool-size=1petabytes --max-thins=1mebi --unit=g -nlong
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.SH DIAGNOSTICS
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.B thin_metadata_size
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@ -31,19 +31,26 @@
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#include <string.h>
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#include "version.h"
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#include <search.h>
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/*----------------------------------------------------------------*/
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enum numeric_options { BLOCKSIZE, POOLSIZE, MAXTHINS, NUMERIC, OPT_END};
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enum return_units { RETURN_BYTES, RETURN_SECTORS };
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enum numeric_type { NO_NUMBER, NUMBER, NUMBER_SHORT, NUMBER_LONG };
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typedef unsigned bool;
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enum bool_value { false = 0, true = 1};
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struct global {
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char *prg; /* program name */
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/* Unit representations in characters, strings and numeric factors. */
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struct {
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char *chars;
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char **strings;
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unsigned long long *factors;
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} unit;
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/* Command line option properties. */
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struct options {
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unsigned unit_idx;
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char *s[OPT_END];
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@ -53,55 +60,32 @@ struct global {
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static void exit_prg(struct global *g, int ret)
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{
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if (g)
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if (g) {
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unsigned u = OPT_END;
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while (u--) {
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if (g->options.s[u])
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free (g->options.s[u]);
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}
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free(g);
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}
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exit(ret);
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}
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static void abort_prg(struct global *g, const char *msg)
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{
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fprintf(stderr, "%s - %s\n", g->prg, msg);
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fprintf(stderr, "%s - %s\n", g ? g->prg : "fatal", msg);
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exit_prg(g, 1);
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}
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static struct global *init_prg(char *prg_path)
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{
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unsigned u;
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static char *unit_chars = "bskKmMgGtTpPeEzZyY";
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static char *unit_strings[] = { "bytes", "sectors",
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"kilobytes", "kibibytes", "megabytes", "mebibytes",
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"gigabytes", "gibibytes", "terabytes", "tebibytes",
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"petabytes", "pebibytes", "exabytes", "ebibytes",
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"zetabytes", "zebibytes", "yottabytes", "yobibytes", NULL };
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static unsigned long long unit_factors[18] = { 1, 512, 1024, 1000 };
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struct global *r = malloc(sizeof(*r));
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if (!r)
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abort_prg(r, "failed to allocate global context!");
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memset(r, 0, sizeof(*r));
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for (u = 4; unit_strings[u]; u += 2) {
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unit_factors[u] = unit_factors[u-2] * unit_factors[2];
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unit_factors[u+1] = unit_factors[u-1] * unit_factors[3];
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}
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r->prg = basename(prg_path);
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r->unit.chars = unit_chars;
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r->unit.strings = unit_strings;
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r->unit.factors = unit_factors;
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return r;
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}
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#define bytes_per_sector(g) (g)->unit.factors[get_index(g, "sectors")]
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static int get_index(struct global *g, char *unit_string)
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static int unit_index(struct global *g, char *unit_string)
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{
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unsigned len;
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if (!unit_string)
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return get_index(g, "sectors");
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return unit_index(g, "sectors");
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len = strlen(unit_string);
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if (len == 1) {
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@ -121,40 +105,76 @@ static int get_index(struct global *g, char *unit_string)
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return -1;
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}
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#define ARRAY_SIZE(a) (sizeof(a)/sizeof(a[0]))
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static struct global *init_prg(char *prg_path)
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{
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unsigned u;
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static char *unit_chars = "bskKmMgGtTpPeEzZyY";
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static char *unit_strings[] = { "bytes", "sectors",
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"kilobytes", "kibibytes", "megabytes", "mebibytes",
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"gigabytes", "gibibytes", "terabytes", "tebibytes",
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"petabytes", "pebibytes", "exabytes", "ebibytes",
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"zetabytes", "zebibytes", "yottabytes", "yobibytes", NULL };
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static unsigned long long unit_factors[ARRAY_SIZE(unit_strings) - 1] = { 1, 512, 1024, 1000 };
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struct global *r = malloc(sizeof(*r));
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if (!r)
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abort_prg(r, "failed to allocate global context!");
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memset(r, 0, sizeof(*r));
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for (u = 4; unit_strings[u]; u += 2) {
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unit_factors[u] = unit_factors[u-2] * unit_factors[2];
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unit_factors[u+1] = unit_factors[u-1] * unit_factors[3];
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}
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r->prg = basename(prg_path);
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r->unit.chars = unit_chars;
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r->unit.strings = unit_strings;
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r->unit.factors = unit_factors;
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r->options.unit_idx = unit_index(r, NULL);
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return r;
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}
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static unsigned long long bytes_per_sector(struct global *g)
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{
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return g->unit.factors[unit_index(g, "sectors")];
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}
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static void check_opts(struct global *g)
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{
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struct options *o = &g->options;
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if (!o->n[BLOCKSIZE] || !o->n[POOLSIZE] || !o->n[MAXTHINS])
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abort_prg(g, "3 arguments required!");
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if (!o->n[BLOCKSIZE])
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abort_prg(g, "block size required!");
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else if (!o->n[POOLSIZE])
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abort_prg(g, "pool size required!");
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else if (!o->n[MAXTHINS])
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abort_prg(g, "max thins required!");
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else if (o->n[BLOCKSIZE] & (o->n[BLOCKSIZE] - 1))
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abort_prg(g, "block size must be 2^^N");
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else if (o->n[POOLSIZE] <= o->n[BLOCKSIZE])
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abort_prg(g, "POOLSIZE must be larger than BLOCKSIZE");
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else if (!o->n[MAXTHINS])
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abort_prg(g, "maximum number of thin provisioned devices must be > 0");
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abort_prg(g, "pool size must be larger than block size");
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}
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static unsigned long long to_bytes(struct global *g, char *sz, enum return_units unit, int *index)
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{
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int idx;
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unsigned long long r;
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char *us;
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for (us = sz; *us; us++) {
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if (!isdigit(*us))
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break;
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}
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char *us = sz;
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/* Get pointer to unit identifier. */
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us += strspn(sz, "0123456789");
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if (*us) {
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idx = get_index(g, us);
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idx = unit_index(g, us);
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if (idx < 0)
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abort_prg(g, "Invalid unit specifier!");
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*us = 0;
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*index = idx;
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} else {
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idx = get_index(g, NULL);
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idx = unit_index(g, NULL);
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us = NULL;
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*index = -1;
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}
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@ -163,13 +183,13 @@ static unsigned long long to_bytes(struct global *g, char *sz, enum return_units
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return (!us || unit == RETURN_SECTORS) ? r / bytes_per_sector(g) : r;
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}
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static void printf_aligned(struct global *g, char *a, char *b, char *c, int units)
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static void printf_aligned(struct global *g, char *a, char *b, char *c, bool units, bool mandatory)
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{
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char buf[80];
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strcpy(buf, b);
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if (units)
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strcat(buf, "["), strcat(buf, g->unit.chars), strcat(buf, "]");
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strcat(buf, mandatory ? "{" :"["), strcat(buf, g->unit.chars), strcat(buf, mandatory ? "}" : "]");
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printf("\t%-4s%-44s%s\n", a, buf, c);
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}
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@ -177,13 +197,13 @@ static void printf_aligned(struct global *g, char *a, char *b, char *c, int unit
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static void help(struct global *g)
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{
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printf ("Thin Provisioning Metadata Device Size Calculator.\nUsage: %s [options]\n", g->prg);
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printf_aligned(g, "-b", "--block-size BLOCKSIZE", "Block size of thin provisioned devices.", 1);
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printf_aligned(g, "-s", "--pool-size SIZE", "Size of pool device.", 1);
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printf_aligned(g, "-m", "--max-thins #MAXTHINS", "Maximum sum of all thin devices and snapshots.", 1);
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printf_aligned(g, "-u", "--unit ", "Output unit specifier.", 1);
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printf_aligned(g, "-n", "--numeric-only[=unit]", "Output numeric value only (optionally with unit identifier).", 0);
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printf_aligned(g, "-h", "--help", "This help.", 0);
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printf_aligned(g, "-V", "--version", "Print thin provisioning tools version.", 0);
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printf_aligned(g, "-b", "--block-size BLOCKSIZE", "Block size of thin provisioned devices.", true, false);
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printf_aligned(g, "-s", "--pool-size SIZE", "Size of pool device.", true, false);
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printf_aligned(g, "-m", "--max-thins #MAXTHINS", "Maximum sum of all thin devices and snapshots.", true, false);
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printf_aligned(g, "-u", "--unit ", "Output unit specifier.", true, true);
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printf_aligned(g, "-n", "--numeric-only [short|long]", "Output numeric value only (optionally with short/long unit identifier).", false, false);
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printf_aligned(g, "-h", "--help", "This help.", false, false);
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printf_aligned(g, "-V", "--version", "Print thin provisioning tools version.", false, false);
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exit_prg(g, 0);
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}
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@ -195,7 +215,7 @@ static void version(struct global *g)
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static void check_unit(struct global *g, char *arg)
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{
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int idx = get_index(g, arg);
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int idx = unit_index(g, arg);
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if (idx < 0)
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abort_prg(g, "output unit specifier invalid!");
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@ -205,33 +225,41 @@ static void check_unit(struct global *g, char *arg)
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static void check_numeric_option(struct global *g, char *arg)
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{
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if (g->options.n[NUMERIC])
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if (g->options.n[NUMERIC] != NO_NUMBER)
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abort_prg(g, "-n already given!");
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g->options.n[NUMERIC] = 1;
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g->options.n[NUMERIC] = NUMBER;
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if (arg) {
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if (!*arg || strncmp("unit", arg, strlen(arg)))
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bool unit_long = !strncmp("long", arg, strlen(arg));
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if (!*arg || (strncmp("short", arg, strlen(arg)) && !unit_long))
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abort_prg(g, "-n invalid option argument");
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g->options.n[NUMERIC]++;
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g->options.n[NUMERIC] = unit_long ? NUMBER_LONG : NUMBER_SHORT;
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}
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}
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static void check_size(struct global *g, enum numeric_options o, char *arg)
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{
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int idx;
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bool valid_index = true;
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if (g->options.n[o])
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abort_prg(g, "option already given!");
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g->options.n[o] = to_bytes(g, arg, o == MAXTHINS ? RETURN_BYTES : RETURN_SECTORS, &idx);
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g->options.s[o] = malloc(strlen(arg) + ((idx > -1) ? strlen(g->unit.strings[idx]) : 0) + 1);
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if (idx < 0) {
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valid_index = false;
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idx = g->options.unit_idx;
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}
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g->options.s[o] = malloc(strlen(arg) + strlen(g->unit.strings[idx]) + 1);
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if (!g->options.s[o])
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abort_prg(g, "failed to allocate string!");
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strcpy(g->options.s[o], arg);
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if (idx > -1)
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if (o != MAXTHINS || valid_index)
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strcat(g->options.s[o], g->unit.strings[idx]);
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}
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@ -272,7 +300,7 @@ static void parse_command_line(struct global *g, int argc, char **argv)
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case 'V':
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version(g); /* exits */
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default:
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abort_prg(g, "Invalid option!");
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exit_prg(g, 1);
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}
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}
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@ -290,38 +318,45 @@ static const unsigned mappings_per_block(void)
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return (btree_size.node - btree_size.node_header) / btree_size.entry;
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}
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static void printf_precision(struct global *g, double r, unsigned idx)
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static void print_precision(struct global *g, double r, unsigned idx)
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{
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int full = !g->options.n[NUMERIC];
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bool full = !g->options.n[NUMERIC];
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double rtrunc = truncl(r);
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if (full)
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printf("%s - estimated metadata area size [blocksize=%s,poolsize=%s,maxthins=%s] is ",
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g->prg, g->options.s[BLOCKSIZE], g->options.s[POOLSIZE], g->options.s[MAXTHINS]);
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printf("%s - ", g->prg);
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if (r == rtrunc)
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printf("%llu", (unsigned long long) r);
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else
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printf(r - truncl(r) < 1E-2 ? "%0.2e" : "%0.2f", r);
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printf(r - rtrunc < 1E-2 ? "%0.2e" : "%0.2f", r);
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if (full)
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printf(" %s", g->unit.strings[idx]);
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else if (g->options.n[NUMERIC] > 1)
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else if (g->options.n[NUMERIC] > NUMBER) {
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if (g->options.n[NUMERIC] == NUMBER_SHORT)
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printf("%c", g->unit.chars[idx]);
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else
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printf("%s", g->unit.strings[idx]);
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}
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if (full)
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printf(" estimated metadata area size for \"--block-size=%s --pool-size=%s --max-thins=%s\"",
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g->options.s[BLOCKSIZE], g->options.s[POOLSIZE], g->options.s[MAXTHINS]);
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putchar('\n');
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}
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static void print_estimated_result(struct global *g)
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{
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unsigned idx = g->options.unit_idx;
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double r;
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/* double-fold # of nodes, because they aren't fully populated in average */
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r = (1.0 + (2 * g->options.n[POOLSIZE] / g->options.n[BLOCKSIZE] / mappings_per_block() + g->options.n[MAXTHINS])) * 8 * bytes_per_sector(g); /* in bytes! */
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r /= g->unit.factors[idx]; /* in requested unit */
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r = (1.0 + (2 * g->options.n[POOLSIZE] / g->options.n[BLOCKSIZE] / mappings_per_block() + g->options.n[MAXTHINS])); /* in 4k blocks */
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r *= 8 * bytes_per_sector(g); /* in bytes! */
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r /= g->unit.factors[g->options.unit_idx]; /* in requested unit */
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printf_precision(g, r, idx);
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print_precision(g, r, g->options.unit_idx);
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}
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int main(int argc, char **argv)
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