o since you can't use DIOCGDINFO and DIOCGSLICEINFO on drive nodes with geom,
get the xml configuration for the devices and "parse" the information to get what's needed o replace #ifdef DEBUG constructs with DPRINT/DPRINTX to make the code more readable Note the xml "parser" is very very hackish and should be replaced with a real one. This one was done to be very small and special-purpose; don't think about copying it elsewhere. Approved by: phk
This commit is contained in:
Sam Leffler
parent
1817ba66c3
commit
bf6e74b5f5
@ -28,11 +28,26 @@ __FBSDID("$FreeBSD$");
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#include <paths.h>
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#include "libdisk.h"
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#define HAVE_GEOM
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#ifdef HAVE_GEOM
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#include <ctype.h>
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#include <errno.h>
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#include <assert.h>
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#endif /*HAVE_GEOM*/
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#ifndef PC98
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#define DOSPTYP_EXTENDED 5
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#define DOSPTYP_ONTRACK 84
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#endif
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#ifdef DEBUG
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#define DPRINT(x) warn x
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#define DPRINTX(x) warnx x
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#else
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#define DPRINT(x)
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#define DPRINTX(x)
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#endif
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const char *chunk_n[] = {
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"whole",
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"unknown",
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@ -59,10 +74,371 @@ Read_Int32(u_int32_t *p)
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}
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#endif
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#ifdef HAVE_GEOM
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/*
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* XXX BEGIN HACK XXX
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* Scan/parse the XML geom data to retrieve what we need to
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* carry out the work of Int_Open_Disk. This is a total hack
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* and should be replaced with a real XML parser.
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*/
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typedef enum {
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XML_MESH,
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XML_MESH_END,
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XML_CLASS,
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XML_CLASS_END,
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XML_GEOM,
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XML_GEOM_END,
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XML_CONFIG,
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XML_CONFIG_END,
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XML_PROVIDER,
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XML_PROVIDER_END,
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XML_NAME,
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XML_NAME_END,
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XML_INDEX,
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XML_INDEX_END,
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XML_LENGTH,
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XML_LENGTH_END,
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XML_SECLENGTH,
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XML_SECLENGTH_END,
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XML_SECOFFSET,
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XML_SECOFFSET_END,
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XML_OFFSET,
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XML_OFFSET_END,
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XML_TYPE,
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XML_TYPE_END,
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XML_OTHER,
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XML_OTHER_END
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} XMLToken;
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#ifdef DEBUG
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static const char*
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xmltokenname(XMLToken t)
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{
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switch (t) {
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case XML_MESH: return "XML_MESH";
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case XML_MESH_END: return "XML_MESH_END";
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case XML_CLASS: return "XML_CLASS";
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case XML_CLASS_END: return "XML_CLASS_END";
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case XML_GEOM: return "XML_GEOM";
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case XML_GEOM_END: return "XML_GEOM_END";
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case XML_CONFIG: return "XML_CONFIG";
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case XML_CONFIG_END: return "XML_CONFIG_END";
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case XML_PROVIDER: return "XML_PROVIDER";
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case XML_PROVIDER_END: return "XML_PROVIDER_END";
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case XML_NAME: return "XML_NAME";
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case XML_NAME_END: return "XML_NAME_END";
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case XML_INDEX: return "XML_INDEX";
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case XML_INDEX_END: return "XML_INDEX_END";
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case XML_LENGTH: return "XML_LENGTH";
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case XML_LENGTH_END: return "XML_LENGTH_END";
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case XML_SECLENGTH: return "XML_SECLENGTH";
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case XML_SECLENGTH_END: return "XML_SECLENGTH_END";
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case XML_SECOFFSET: return "XML_SECOFFSET";
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case XML_SECOFFSET_END: return "XML_SECOFFSET_END";
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case XML_OFFSET: return "XML_OFFSET";
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case XML_OFFSET_END: return "XML_OFFSET_END";
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case XML_TYPE: return "XML_TYPE";
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case XML_TYPE_END: return "XML_TYPE_END";
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case XML_OTHER: return "XML_OTHER";
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case XML_OTHER_END: return "XML_OTHER_END";
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}
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return "???";
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}
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#endif /*DEBUG*/
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/*
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* Parse the next XML token delimited by <..>. If the token
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* has a "builtin terminator" (<... />) then just skip it and
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* go the next token.
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*/
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static int
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xmltoken(const char *start, const char **next, XMLToken *t)
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{
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const char *cp = start;
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const char *token;
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again:
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while (*cp != '<') {
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if (*cp == '\0') {
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*next = cp;
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DPRINTX(("xmltoken: EOD"));
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return 0;
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}
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cp++;
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}
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token = ++cp;
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for (; *cp && *cp != '>' && !isspace(*cp); cp++)
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;
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if (*cp == '\0') {
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*next = cp;
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DPRINTX(("xmltoken: EOD"));
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return 0;
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}
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*t = (*token == '/');
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if (*t)
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token++;
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if (strncasecmp(token, "mesh", cp-token) == 0)
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*t += XML_MESH;
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else if (strncasecmp(token, "class", cp-token) == 0)
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*t += XML_CLASS;
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else if (strncasecmp(token, "geom", cp-token) == 0)
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*t += XML_GEOM;
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else if (strncasecmp(token, "config", cp-token) == 0)
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*t += XML_CONFIG;
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else if (strncasecmp(token, "provider", cp-token) == 0)
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*t += XML_PROVIDER;
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else if (strncasecmp(token, "name", cp-token) == 0)
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*t += XML_NAME;
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else if (strncasecmp(token, "index", cp-token) == 0)
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*t += XML_INDEX;
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else if (strncasecmp(token, "length", cp-token) == 0)
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*t += XML_LENGTH;
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else if (strncasecmp(token, "seclength", cp-token) == 0)
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*t += XML_SECLENGTH;
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else if (strncasecmp(token, "secoffset", cp-token) == 0)
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*t += XML_SECOFFSET;
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else if (strncasecmp(token, "offset", cp-token) == 0)
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*t += XML_OFFSET;
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else if (strncasecmp(token, "type", cp-token) == 0)
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*t += XML_TYPE;
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else
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*t += XML_OTHER;
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/* now collect the remainder of the string */
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for (; *cp != '>' && *cp != '\0'; cp++)
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;
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if (*cp == '\0') {
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*next = cp;
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DPRINTX(("xmltoken: EOD"));
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return 0;
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}
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if (cp > token && cp[-1] == '/') {
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/* e.g. <geom ref="0xc1c8c100"/> */
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start = cp+1;
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goto again;
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}
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*next = cp+1;
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DPRINTX(("xmltoken: %s \"%.*s\"", xmltokenname(*t), cp-token, token));
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return 1;
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}
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/*
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* Parse and discard XML up to the token terminator.
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*/
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static int
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discardxml(const char **next, XMLToken terminator)
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{
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const char *xml = *next;
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XMLToken t;
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DPRINTX(("discard XML up to %s", xmltokenname(terminator)));
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for (;;) {
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if (xmltoken(xml, next, &t) == 0)
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return EINVAL;
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if (t == terminator)
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break;
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if ((t & 1) == 0) {
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int error = discardxml(next, t+1);
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if (error)
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return error;
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}
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xml = *next;
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}
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return 0;
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}
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/*
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* Parse XML from between a range of markers; e.g. <mesh> ... </mesh>.
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* When the specified class name is located we descend looking for the
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* geometry information given by diskname. Once inside there we process
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* tags calling f back for each useful one. The arg is passed into f
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* for use in storing the parsed data.
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*/
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static int
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parsexmlpair(
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const char *xml,
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const char **next,
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const char *classname,
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XMLToken terminator,
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const char *diskname,
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int (*f)(void *, XMLToken, u_int *, u_long),
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void *arg
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)
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{
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const char *cp;
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XMLToken t;
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int error;
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u_int ix = (u_int) -1;
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DPRINTX(("parse XML up to %s", xmltokenname(terminator)));
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do {
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if (xmltoken(xml, next, &t) == 0) {
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error = EINVAL;
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break;
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}
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if (t == terminator) {
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error = 0;
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break;
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}
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if (t & 1) { /* </mumble> w/o matching <mumble> */
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DPRINTX(("Unexpected token %s", xmltokenname(t)));
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error = EINVAL;
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break;
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}
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switch ((int) t) {
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case XML_NAME:
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for (cp = *next; *cp && *cp != '<'; cp++)
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;
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if (*cp == '\0') {
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DPRINTX(("parsexmlpair: EOD"));
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error = EINVAL;
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goto done;
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}
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DPRINTX(("parsexmlpair: \"%.*s\"", cp-*next, *next));
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switch ((int) terminator) {
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case XML_CLASS_END:
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if (strncasecmp(*next, classname, cp-*next))
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return discardxml(next, terminator);
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break;
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case XML_GEOM_END:
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if (strncasecmp(*next, diskname, cp-*next))
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return discardxml(next, terminator);
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break;
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}
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break;
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case XML_SECOFFSET:
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case XML_SECLENGTH:
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case XML_TYPE:
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if (ix == (u_int) -1) {
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DPRINTX(("parsexmlpair: slice data w/o "
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"preceding index"));
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error = EINVAL;
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goto done;
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}
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/* fall thru... */
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case XML_INDEX:
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if (terminator != XML_CONFIG_END) {
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DPRINTX(("parsexmlpair: %s in unexpected "
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"context: terminator %s",
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xmltokenname(t),
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xmltokenname(terminator)));
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error = EINVAL;
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goto done;
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}
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error = (*f)(arg, t, &ix, strtoul(*next, NULL, 10));
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if (error)
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goto done;
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break;
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}
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error = parsexmlpair(*next, &xml, classname,
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t+1, diskname, f, arg);
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} while (error == 0);
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done:
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return error;
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}
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/*
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* XML parser. Just barely smart enough to handle the
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* gibberish that geom passed back from the kernel.
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*/
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static int
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xmlparse(
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const char *confxml,
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const char *classname,
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const char *diskname,
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int (*f)(void *, XMLToken, u_int *, u_long),
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void *arg
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)
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{
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const char *next;
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XMLToken t;
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int error;
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next = confxml;
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while (xmltoken(next, &next, &t) && t != XML_MESH)
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;
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if (t == XML_MESH)
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error = parsexmlpair(next, &next, classname, XML_MESH_END, diskname, f, arg);
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else {
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DPRINTX(("xmlparse: expecting mesh token, got %s",
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xmltokenname(t)));
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error = EINVAL;
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}
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return (error ? -1 : 0);
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}
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/*
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* Callback to collect slice-related data.
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*/
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static int
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assignToSlice(void *arg, XMLToken t, u_int *slice, u_long v)
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{
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struct diskslices *ds = (struct diskslices *) arg;
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switch ((int) t) {
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case XML_INDEX:
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*slice = BASE_SLICE + (u_int) v;
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if (*slice >= MAX_SLICES) {
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DPRINTX(("assignToSlice: invalid slice index %u > max %u",
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*slice, MAX_SLICES));
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return EINVAL;
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}
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if (*slice >= ds->dss_nslices)
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ds->dss_nslices = (*slice)+1;
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break;
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case XML_SECOFFSET:
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ds->dss_slices[*slice].ds_offset = v;
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break;
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case XML_SECLENGTH:
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ds->dss_slices[*slice].ds_size = v;
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break;
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case XML_TYPE:
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ds->dss_slices[*slice].ds_type = v;
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break;
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}
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return 0;
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}
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/*
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* Callback to collect partition-related data.
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*/
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static int
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assignToPartition(void *arg, XMLToken t, u_int *part, u_long v)
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{
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struct disklabel *dl = (struct disklabel *) arg;
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switch ((int) t) {
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case XML_INDEX:
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*part = (u_int) v;
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if (*part >= MAXPARTITIONS) {
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DPRINTX(("assignToPartition: invalid partition index %u > max %u",
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*part, MAXPARTITIONS));
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return EINVAL;
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}
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if (*part >= dl->d_npartitions)
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dl->d_npartitions = (*part)+1;
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break;
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case XML_SECOFFSET:
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dl->d_partitions[*part].p_offset = (u_int32_t) v;
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break;
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case XML_SECLENGTH:
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dl->d_partitions[*part].p_size = (u_int32_t) v;
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break;
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case XML_TYPE:
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dl->d_partitions[*part].p_fstype = (u_int8_t) v;
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break;
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}
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return 0;
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}
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#endif /*HAVE_GEOM*/
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struct disk *
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Int_Open_Disk(const char *name, u_long size)
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{
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int i,fd;
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int i;
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int fd = -1;
|
||||
struct diskslices ds;
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struct disklabel dl;
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char device[64], *buf;
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@ -75,6 +451,11 @@ Int_Open_Disk(const char *name, u_long size)
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void *p;
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#endif
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u_long offset = 0;
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#ifdef HAVE_GEOM
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char *confxml = NULL;
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size_t xmlsize;
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||||
int error;
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#endif /*HAVE_GEOM*/
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strlcpy(device, _PATH_DEV, sizeof(device));
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strlcat(device, name, sizeof(device));
|
||||
@ -85,27 +466,52 @@ Int_Open_Disk(const char *name, u_long size)
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||||
|
||||
fd = open(device, O_RDONLY);
|
||||
if (fd < 0) {
|
||||
#ifdef DEBUG
|
||||
warn("open(%s) failed", device);
|
||||
#endif
|
||||
return 0;
|
||||
DPRINT(("open(%s) failed", device));
|
||||
goto bad;
|
||||
}
|
||||
|
||||
memset(&dl, 0, sizeof dl);
|
||||
memset(&ds, 0, sizeof ds);
|
||||
#ifdef HAVE_GEOM
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||||
/*
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* Read and hack-parse the XML that provides the info we need.
|
||||
*/
|
||||
error = sysctlbyname("kern.geom.confxml", NULL, &xmlsize, NULL, 0);
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if (error) {
|
||||
warn("kern.geom.confxml sysctl not available, giving up!");
|
||||
goto bad;
|
||||
}
|
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confxml = (char *) malloc(xmlsize+1);
|
||||
if (confxml == NULL) {
|
||||
DPRINT(("cannot malloc memory for confxml"));
|
||||
goto bad;
|
||||
}
|
||||
error = sysctlbyname("kern.geom.confxml", confxml, &xmlsize, NULL, 0);
|
||||
if (error) {
|
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DPRINT(("error reading kern.geom.confxml from the system"));
|
||||
goto bad;
|
||||
}
|
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confxml[xmlsize] = '\0'; /* in case kernel bug is still there */
|
||||
|
||||
if (xmlparse(confxml, "MBR", name, assignToSlice, &ds) != 0) {
|
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DPRINTX(("Error parsing MBR geometry specification."));
|
||||
goto bad;
|
||||
}
|
||||
/* XXX how do I get this info from the XML? */
|
||||
for (i = BASE_SLICE; i < ds.dss_nslices; i++) {
|
||||
struct diskslice *dsp = &ds.dss_slices[i];
|
||||
if (dsp->ds_offset + dsp->ds_size > ds.dss_slices[WHOLE_DISK_SLICE].ds_size)
|
||||
ds.dss_slices[WHOLE_DISK_SLICE].ds_size = dsp->ds_offset + dsp->ds_size;
|
||||
}
|
||||
#else /* !HAVE_GEOM */
|
||||
if (ioctl(fd, DIOCGDINFO, &dl) < 0) {
|
||||
#ifdef DEBUG
|
||||
warn("DIOCGDINFO(%s) failed", device);
|
||||
#endif
|
||||
close(fd);
|
||||
return 0;
|
||||
DPRINT(("DIOCGDINFO(%s) failed", device));
|
||||
goto bad;
|
||||
}
|
||||
i = ioctl(fd, DIOCGSLICEINFO, &ds);
|
||||
if (i < 0) {
|
||||
#ifdef DEBUG
|
||||
warn("DIOCGSLICEINFO(%s) failed", device);
|
||||
#endif
|
||||
close(fd);
|
||||
return 0;
|
||||
DPRINT(("DIOCGSLICEINFO(%s) failed", device));
|
||||
goto bad;
|
||||
}
|
||||
|
||||
#ifdef DEBUG
|
||||
@ -115,6 +521,7 @@ Int_Open_Disk(const char *name, u_long size)
|
||||
i, ds.dss_slices[i].ds_openmask);
|
||||
printf("\n");
|
||||
#endif
|
||||
#endif /*SADDLED_WTIH_GEOM*/
|
||||
|
||||
/* XXX --- ds.dss_slice[WHOLE_DISK_SLICE].ds.size of MO disk is wrong!!! */
|
||||
#ifdef PC98
|
||||
@ -136,11 +543,10 @@ Int_Open_Disk(const char *name, u_long size)
|
||||
}
|
||||
free (buf);
|
||||
if (sector_size > MAX_SEC_SIZE) {
|
||||
#ifdef DEBUG
|
||||
warn("Int_Open_Disk: could not determine sector size, "
|
||||
"calculated %u, max %u\n", sector_size, MAX_SEC_SIZE);
|
||||
#endif
|
||||
return NULL; /* could not determine sector size */
|
||||
DPRINT(("Int_Open_Disk: could not determine sector size, "
|
||||
"calculated %u, max %u\n", sector_size, MAX_SEC_SIZE));
|
||||
/* could not determine sector size */
|
||||
goto bad;
|
||||
}
|
||||
|
||||
#ifdef PC98
|
||||
@ -179,11 +585,7 @@ Int_Open_Disk(const char *name, u_long size)
|
||||
#else
|
||||
if (Add_Chunk(d, -offset, size, name, whole, 0, 0))
|
||||
#endif
|
||||
#ifdef DEBUG
|
||||
warn("Failed to add 'whole' chunk");
|
||||
#else
|
||||
{}
|
||||
#endif
|
||||
DPRINT(("Failed to add 'whole' chunk"));
|
||||
|
||||
#ifdef __i386__
|
||||
#ifdef PC98
|
||||
@ -201,9 +603,11 @@ Int_Open_Disk(const char *name, u_long size)
|
||||
#endif /* PC98 */
|
||||
for(i=BASE_SLICE;i<ds.dss_nslices;i++) {
|
||||
char sname[20];
|
||||
char pname[20];
|
||||
chunk_e ce;
|
||||
u_long flags=0;
|
||||
int subtype=0;
|
||||
int j;
|
||||
|
||||
if (! ds.dss_slices[i].ds_size)
|
||||
continue;
|
||||
@ -254,11 +658,7 @@ Int_Open_Disk(const char *name, u_long size)
|
||||
if (Add_Chunk(d, ds.dss_slices[i].ds_offset,
|
||||
ds.dss_slices[i].ds_size, sname, ce, subtype, flags))
|
||||
#endif
|
||||
#ifdef DEBUG
|
||||
warn("failed to add chunk for slice %d", i - 1);
|
||||
#else
|
||||
{}
|
||||
#endif
|
||||
DPRINT(("failed to add chunk for slice %d", i - 1));
|
||||
|
||||
#ifdef PC98
|
||||
if ((ds.dss_slices[i].ds_type & 0x7f) != 0x14)
|
||||
@ -266,29 +666,32 @@ Int_Open_Disk(const char *name, u_long size)
|
||||
if (ds.dss_slices[i].ds_type != 0xa5)
|
||||
#endif
|
||||
continue;
|
||||
#ifdef HAVE_GEOM
|
||||
if (xmlparse(confxml, "BSD", sname, assignToPartition, &dl) != 0) {
|
||||
DPRINTX(("Error parsing MBR geometry specification."));
|
||||
goto bad;
|
||||
}
|
||||
#else
|
||||
{
|
||||
struct disklabel dl;
|
||||
char pname[20];
|
||||
int j, k;
|
||||
int k;
|
||||
|
||||
strlcpy(pname, _PATH_DEV, sizeof(pname));
|
||||
strlcat(pname, sname, sizeof(pname));
|
||||
j = open(pname, O_RDONLY);
|
||||
if (j < 0) {
|
||||
#ifdef DEBUG
|
||||
warn("open(%s)", pname);
|
||||
#endif
|
||||
DPRINT(("open(%s)", pname));
|
||||
continue;
|
||||
}
|
||||
k = ioctl(j, DIOCGDINFO, &dl);
|
||||
if (k < 0) {
|
||||
#ifdef DEBUG
|
||||
warn("ioctl(%s, DIOCGDINFO)", pname);
|
||||
#endif
|
||||
DPRINT(("ioctl(%s, DIOCGDINFO)", pname));
|
||||
close(j);
|
||||
continue;
|
||||
}
|
||||
close(j);
|
||||
}
|
||||
#endif /*HAVE_GEOM*/
|
||||
|
||||
for(j = 0; j <= dl.d_npartitions; j++) {
|
||||
if (j == RAW_PART)
|
||||
@ -318,15 +721,10 @@ Int_Open_Disk(const char *name, u_long size)
|
||||
#else
|
||||
0) && j != 3)
|
||||
#endif
|
||||
#ifdef DEBUG
|
||||
warn(
|
||||
DPRINT((
|
||||
"Failed to add chunk for partition %c [%lu,%lu]",
|
||||
j + 'a', dl.d_partitions[j].p_offset,
|
||||
dl.d_partitions[j].p_size);
|
||||
#else
|
||||
{}
|
||||
#endif
|
||||
}
|
||||
dl.d_partitions[j].p_size));
|
||||
}
|
||||
}
|
||||
#endif /* __i386__ */
|
||||
@ -340,16 +738,12 @@ Int_Open_Disk(const char *name, u_long size)
|
||||
strlcat(pname, name, sizeof(pname));
|
||||
j = open(pname, O_RDONLY);
|
||||
if (j < 0) {
|
||||
#ifdef DEBUG
|
||||
warn("open(%s)", pname);
|
||||
#endif
|
||||
DPRINT(("open(%s)", pname));
|
||||
goto nolabel;
|
||||
}
|
||||
k = ioctl(j, DIOCGDINFO, &dl);
|
||||
if (k < 0) {
|
||||
#ifdef DEBUG
|
||||
warn("ioctl(%s, DIOCGDINFO)", pname);
|
||||
#endif
|
||||
DPRINT(("ioctl(%s, DIOCGDINFO)", pname));
|
||||
close(j);
|
||||
goto nolabel;
|
||||
}
|
||||
@ -378,14 +772,10 @@ Int_Open_Disk(const char *name, u_long size)
|
||||
pname,part,
|
||||
dl.d_partitions[j].p_fstype,
|
||||
0) && j != 3)
|
||||
#ifdef DEBUG
|
||||
warn(
|
||||
DPRINT((
|
||||
"Failed to add chunk for partition %c [%lu,%lu]",
|
||||
j + 'a', dl.d_partitions[j].p_offset,
|
||||
dl.d_partitions[j].p_size);
|
||||
#else
|
||||
{}
|
||||
#endif
|
||||
dl.d_partitions[j].p_size));
|
||||
}
|
||||
nolabel:;
|
||||
}
|
||||
@ -396,6 +786,12 @@ Int_Open_Disk(const char *name, u_long size)
|
||||
close(fd);
|
||||
Fixup_Names(d);
|
||||
return d;
|
||||
bad:
|
||||
if (confxml != NULL)
|
||||
free(confxml);
|
||||
if (fd >= 0)
|
||||
close(fd);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
void
|
||||
@ -527,12 +923,12 @@ Disk_Names()
|
||||
memset(disks,0,sizeof *disks * (1 + MAX_NO_DISKS));
|
||||
error = sysctlbyname("kern.disks", NULL, &listsize, NULL, 0);
|
||||
if (!error) {
|
||||
disklist = (char *)malloc(listsize);
|
||||
disklist = (char *)malloc(listsize+1);
|
||||
if (disklist == NULL) {
|
||||
free(disks);
|
||||
return NULL;
|
||||
}
|
||||
memset(disklist, 0, listsize);
|
||||
memset(disklist, 0, listsize+1);
|
||||
error = sysctlbyname("kern.disks", disklist, &listsize, NULL, 0);
|
||||
if (error) {
|
||||
free(disklist);
|
||||
@ -559,9 +955,7 @@ Disk_Names()
|
||||
if ((fd = open(disk, O_RDWR)) == -1)
|
||||
continue;
|
||||
if (ioctl(fd, DIOCGSLICEINFO, &ds) == -1) {
|
||||
#ifdef DEBUG
|
||||
warn("DIOCGSLICEINFO %s", disk);
|
||||
#endif
|
||||
DPRINT(("DIOCGSLICEINFO %s", disk));
|
||||
close(fd);
|
||||
continue;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user