/*- * Copyright (c) 1997, 1998 * Nan Yang Computer Services Limited. All rights reserved. * * This software is distributed under the so-called ``Berkeley * License'': * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Nan Yang Computer * Services Limited. * 4. Neither the name of the Company nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * This software is provided ``as is'', and any express or implied * warranties, including, but not limited to, the implied warranties of * merchantability and fitness for a particular purpose are disclaimed. * In no event shall the company or contributors be liable for any * direct, indirect, incidental, special, exemplary, or consequential * damages (including, but not limited to, procurement of substitute * goods or services; loss of use, data, or profits; or business * interruption) however caused and on any theory of liability, whether * in contract, strict liability, or tort (including negligence or * otherwise) arising in any way out of the use of this software, even if * advised of the possibility of such damage. * * $Id: vinumutil.c,v 1.11 1999/03/19 06:50:44 grog Exp grog $ */ /* This file contains utility routines used both in kernel and user context */ #include #include #ifndef KERNEL #include extern jmp_buf command_fail; /* return on a failed command */ #endif static char numeric_state[32]; /* temporary buffer for ASCII conversions */ #define STATECOUNT(x) (sizeof (x##statetext) / sizeof (char *)) /* Return drive state as a string */ char * drive_state(enum drivestate state) { if (((unsigned) state) >= STATECOUNT(drive)) { sprintf(numeric_state, "Invalid state %d", (int) state); return numeric_state; } else return drivestatetext[state]; } /* Return volume state as a string */ char * volume_state(enum volumestate state) { if (((unsigned) state) >= STATECOUNT(vol)) { sprintf(numeric_state, "Invalid state %d", (int) state); return numeric_state; } else return volstatetext[state]; } /* Return plex state as a string */ char * plex_state(enum plexstate state) { if (((unsigned) state) >= STATECOUNT(plex)) { sprintf(numeric_state, "Invalid state %d", (int) state); return numeric_state; } else return plexstatetext[state]; } /* Return plex organization as a string */ char * plex_org(enum plexorg org) { switch (org) { case plex_disorg: /* disorganized */ return "disorg"; break; case plex_concat: /* concatenated plex */ return "concat"; break; case plex_striped: /* striped plex */ return "striped"; break; case plex_raid5: /* RAID5 plex */ return "raid5"; break; default: sprintf(numeric_state, "Invalid org %d", (int) org); return numeric_state; } } /* Return sd state as a string */ char * sd_state(enum sdstate state) { if (((unsigned) state) >= STATECOUNT(sd)) { sprintf(numeric_state, "Invalid state %d", (int) state); return numeric_state; } else return sdstatetext[state]; } /* Now convert in the other direction */ /* * These are currently used only internally, * so we don't do too much error checking */ enum drivestate DriveState(char *text) { int i; for (i = 0; i < STATECOUNT(drive); i++) if (strcmp(text, drivestatetext[i]) == 0) /* found it */ return (enum drivestate) i; return -1; } enum sdstate SdState(char *text) { int i; for (i = 0; i < STATECOUNT(sd); i++) if (strcmp(text, sdstatetext[i]) == 0) /* found it */ return (enum sdstate) i; return -1; } enum plexstate PlexState(char *text) { int i; for (i = 0; i < STATECOUNT(plex); i++) if (strcmp(text, plexstatetext[i]) == 0) /* found it */ return (enum plexstate) i; return -1; } enum volumestate VolState(char *text) { int i; for (i = 0; i < STATECOUNT(vol); i++) if (strcmp(text, volstatetext[i]) == 0) /* found it */ return (enum volumestate) i; return -1; } /* * Take a number with an optional scale factor and convert * it to a number of bytes. * * The scale factors are: * * b blocks (of 512 bytes) * k kilobytes (1024 bytes) * m megabytes (of 1024 * 1024 bytes) * g gigabytes (of 1024 * 1024 * 1024 bytes) */ u_int64_t sizespec(char *spec) { u_int64_t size; char *s; int sign = 1; /* -1 if negative */ size = 0; if (spec != NULL) { /* we have a parameter */ s = spec; if (*s == '-') { /* negative, */ sign = -1; s++; /* skip */ } if ((*s >= '0') && (*s <= '9')) { /* it's numeric */ while ((*s >= '0') && (*s <= '9')) /* it's numeric */ size = size * 10 + *s++ - '0'; /* convert it */ switch (*s) { case '\0': return size * sign; case 'B': case 'b': case 'S': case 's': return size * sign * 512; case 'K': case 'k': return size * sign * 1024; case 'M': case 'm': return size * sign * 1024 * 1024; case 'G': case 'g': return size * sign * 1024 * 1024 * 1024; } } #ifdef KERNEL throw_rude_remark(EINVAL, "Invalid length specification: %s", spec); #else fprintf(stderr, "Invalid length specification: %s", spec); longjmp(command_fail, -1); #endif } #ifdef KERNEL throw_rude_remark(EINVAL, "Missing length specification"); #else fprintf(stderr, "Missing length specification"); longjmp(command_fail, -1); #endif /* NOTREACHED */ return -1; } /* * Extract the volume number from a device number. * Perform no checking. */ int Volno(dev_t dev) { return (minor(dev) & MASK(VINUM_VOL_WIDTH)) >> VINUM_VOL_SHIFT; } /* * Extract a plex number from a device number. * Don't check the major number, but check the * type. Return -1 for invalid types. */ int Plexno(dev_t dev) { switch (DEVTYPE(dev)) { case VINUM_VOLUME_TYPE: case VINUM_DRIVE_TYPE: case VINUM_SUPERDEV_TYPE: /* ordinary super device */ case VINUM_RAWSD_TYPE: return -1; case VINUM_PLEX_TYPE: case VINUM_SD_TYPE: return VOL[Volno(dev)].plex[(minor(dev) >> VINUM_PLEX_SHIFT) & (MASK(VINUM_PLEX_WIDTH))]; case VINUM_RAWPLEX_TYPE: return ((minor(dev) & MASK(VINUM_VOL_WIDTH)) >> VINUM_VOL_SHIFT) /* low order 8 bits */ |((minor(dev) >> VINUM_RAWPLEX_SHIFT) & (MASK(VINUM_RAWPLEX_WIDTH) << (VINUM_VOL_SHIFT + VINUM_VOL_WIDTH))); /* upper 12 bits */ } return 0; /* compiler paranoia */ } /* * Extract a subdisk number from a device number. * Don't check the major number, but check the * type. Return -1 for invalid types. */ int Sdno(dev_t dev) { switch (DEVTYPE(dev)) { case VINUM_VOLUME_TYPE: case VINUM_DRIVE_TYPE: case VINUM_SUPERDEV_TYPE: /* ordinary super device */ case VINUM_PLEX_TYPE: case VINUM_RAWPLEX_TYPE: return -1; case VINUM_SD_TYPE: return PLEX[Plexno(dev)].sdnos[(minor(dev) >> VINUM_SD_SHIFT) & (MASK(VINUM_SD_WIDTH))]; case VINUM_RAWSD_TYPE: return ((minor(dev) & MASK(VINUM_VOL_WIDTH)) >> VINUM_VOL_SHIFT) /* low order 8 bits */ |((minor(dev) >> VINUM_RAWPLEX_SHIFT) & (MASK(VINUM_RAWPLEX_WIDTH) << (VINUM_VOL_SHIFT + VINUM_VOL_WIDTH))); /* upper 12 bits */ } return -1; /* compiler paranoia */ }