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Remove virStorageFileCanonicalizePath

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Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Peter Krempa 2021-03-22 17:33:41 +01:00
parent 887d747dbe
commit b2c2de01dc
3 changed files with 0 additions and 219 deletions
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1
src/libvirt_private.syms
View File

@ -3235,7 +3235,6 @@ virSocketAddrSetPort;
# util/virstoragefile.h
virStorageFileCanonicalizePath;
virStorageFileGetNPIVKey;
virStorageFileGetSCSIKey;
virStorageFileParseBackingStoreStr;

210
src/util/virstoragefile.c
View File

@ -214,213 +214,3 @@ virStorageFileParseBackingStoreStr(const char *str,
*chainIndex = idx;
return 0;
}
static char *
virStorageFileCanonicalizeFormatPath(char **components,
size_t ncomponents,
bool beginSlash,
bool beginDoubleSlash)
{
g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
size_t i;
char *ret = NULL;
if (beginSlash)
virBufferAddLit(&buf, "/");
if (beginDoubleSlash)
virBufferAddLit(&buf, "/");
for (i = 0; i < ncomponents; i++) {
if (i != 0)
virBufferAddLit(&buf, "/");
virBufferAdd(&buf, components[i], -1);
}
/* if the output string is empty just return an empty string */
if (!(ret = virBufferContentAndReset(&buf)))
ret = g_strdup("");
return ret;
}
static int
virStorageFileCanonicalizeInjectSymlink(const char *path,
size_t at,
char ***components,
size_t *ncomponents)
{
char **tmp = NULL;
char **next;
size_t ntmp = 0;
int ret = -1;
if (!(tmp = virStringSplitCount(path, "/", 0, &ntmp)))
goto cleanup;
/* prepend */
for (next = tmp; *next; next++) {
if (VIR_INSERT_ELEMENT(*components, at, *ncomponents, *next) < 0)
goto cleanup;
at++;
}
ret = 0;
cleanup:
virStringListFreeCount(tmp, ntmp);
return ret;
}
char *
virStorageFileCanonicalizePath(const char *path,
virStorageFileSimplifyPathReadlinkCallback cb,
void *cbdata)
{
GHashTable *cycle = NULL;
bool beginSlash = false;
bool beginDoubleSlash = false;
char **components = NULL;
size_t ncomponents = 0;
size_t i = 0;
size_t j = 0;
int rc;
char *ret = NULL;
g_autofree char *linkpath = NULL;
g_autofree char *currentpath = NULL;
if (path[0] == '/') {
beginSlash = true;
if (path[1] == '/' && path[2] != '/')
beginDoubleSlash = true;
}
if (!(cycle = virHashNew(NULL)))
goto cleanup;
if (!(components = virStringSplitCount(path, "/", 0, &ncomponents)))
goto cleanup;
j = 0;
while (j < ncomponents) {
/* skip slashes */
if (STREQ(components[j], "")) {
VIR_FREE(components[j]);
VIR_DELETE_ELEMENT(components, j, ncomponents);
continue;
}
j++;
}
while (i < ncomponents) {
/* skip '.'s unless it's the last one remaining */
if (STREQ(components[i], ".") &&
(beginSlash || ncomponents > 1)) {
VIR_FREE(components[i]);
VIR_DELETE_ELEMENT(components, i, ncomponents);
continue;
}
/* resolve changes to parent directory */
if (STREQ(components[i], "..")) {
if (!beginSlash &&
(i == 0 || STREQ(components[i - 1], ".."))) {
i++;
continue;
}
VIR_FREE(components[i]);
VIR_DELETE_ELEMENT(components, i, ncomponents);
if (i != 0) {
VIR_FREE(components[i - 1]);
VIR_DELETE_ELEMENT(components, i - 1, ncomponents);
i--;
}
continue;
}
/* check if the actual path isn't resulting into a symlink */
if (!(currentpath = virStorageFileCanonicalizeFormatPath(components,
i + 1,
beginSlash,
beginDoubleSlash)))
goto cleanup;
if ((rc = cb(currentpath, &linkpath, cbdata)) < 0)
goto cleanup;
if (rc == 0) {
if (virHashLookup(cycle, currentpath)) {
virReportSystemError(ELOOP,
_("Failed to canonicalize path '%s'"), path);
goto cleanup;
}
if (virHashAddEntry(cycle, currentpath, (void *) 1) < 0)
goto cleanup;
if (linkpath[0] == '/') {
/* kill everything from the beginning including the actual component */
i++;
while (i--) {
VIR_FREE(components[0]);
VIR_DELETE_ELEMENT(components, 0, ncomponents);
}
beginSlash = true;
if (linkpath[1] == '/' && linkpath[2] != '/')
beginDoubleSlash = true;
else
beginDoubleSlash = false;
i = 0;
} else {
VIR_FREE(components[i]);
VIR_DELETE_ELEMENT(components, i, ncomponents);
}
if (virStorageFileCanonicalizeInjectSymlink(linkpath,
i,
&components,
&ncomponents) < 0)
goto cleanup;
j = 0;
while (j < ncomponents) {
/* skip slashes */
if (STREQ(components[j], "")) {
VIR_FREE(components[j]);
VIR_DELETE_ELEMENT(components, j, ncomponents);
continue;
}
j++;
}
VIR_FREE(linkpath);
VIR_FREE(currentpath);
continue;
}
VIR_FREE(currentpath);
i++;
}
ret = virStorageFileCanonicalizeFormatPath(components, ncomponents,
beginSlash, beginDoubleSlash);
cleanup:
virHashFree(cycle);
virStringListFreeCount(components, ncomponents);
return ret;
}

8
src/util/virstoragefile.h
View File

@ -33,11 +33,3 @@ int virStorageFileGetSCSIKey(const char *path,
bool ignoreError);
int virStorageFileGetNPIVKey(const char *path,
char **key);
typedef int
(*virStorageFileSimplifyPathReadlinkCallback)(const char *path,
char **link,
void *data);
char *virStorageFileCanonicalizePath(const char *path,
virStorageFileSimplifyPathReadlinkCallback cb,
void *cbdata);