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git://sourceware.org/git/lvm2.git
synced 2024-11-04 22:22:07 +03:00
libdm: refactor internal mangling functions
(un)mangle_name -> (un)mangle_string check_multiple_mangled_name_allowed -> check_multiple_mangled_string_allowed Just for clarity as the same functions will be reused to (un)mangle dm UUIDs.
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f65754e6fc
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b0f48b9533
@ -1559,10 +1559,10 @@ static int _do_dm_ioctl_unmangle_name(char *name)
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if (mode == DM_STRING_MANGLING_NONE)
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return 1;
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if (!check_multiple_mangled_name_allowed(mode, name))
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if (!check_multiple_mangled_string_allowed(name, "name", mode))
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return_0;
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if ((r = unmangle_name(name, DM_NAME_LEN, buf, sizeof(buf), mode)) < 0) {
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if ((r = unmangle_string(name, "name", DM_NAME_LEN, buf, sizeof(buf), mode)) < 0) {
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log_debug("_do_dm_ioctl_unmangle_name: failed to "
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"unmangle \"%s\"", name);
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return 0;
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@ -326,11 +326,12 @@ static int _is_whitelisted_char(char c)
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return 0;
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}
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int check_multiple_mangled_name_allowed(dm_string_mangling_t mode, const char *name)
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int check_multiple_mangled_string_allowed(const char *str, const char *str_name,
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dm_string_mangling_t mode)
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{
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if (mode == DM_STRING_MANGLING_AUTO && strstr(name, "\\x5cx")) {
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log_error("The name \"%s\" seems to be mangled more than once. "
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"This is not allowed in auto mode.", name);
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if (mode == DM_STRING_MANGLING_AUTO && strstr(str, "\\x5cx")) {
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log_error("The %s \"%s\" seems to be mangled more than once. "
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"This is not allowed in auto mode.", str_name, str);
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return 0;
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}
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@ -341,8 +342,8 @@ int check_multiple_mangled_name_allowed(dm_string_mangling_t mode, const char *n
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* Mangle all characters in the input string which are not on a whitelist
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* with '\xNN' format where NN is the hex value of the character.
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*/
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int mangle_name(const char *str, size_t len, char *buf,
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size_t buf_len, dm_string_mangling_t mode)
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int mangle_string(const char *str, const char *str_name, size_t len,
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char *buf, size_t buf_len, dm_string_mangling_t mode)
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{
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int need_mangling = -1; /* -1 don't know yet, 0 no, 1 yes */
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size_t i, j;
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@ -355,7 +356,7 @@ int mangle_name(const char *str, size_t len, char *buf,
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return 0;
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if (buf_len < DM_NAME_LEN) {
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log_error(INTERNAL_ERROR "mangle_name: supplied buffer too small");
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log_error(INTERNAL_ERROR "mangle_string: supplied buffer too small");
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return -1;
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}
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@ -417,11 +418,11 @@ int mangle_name(const char *str, size_t len, char *buf,
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return need_mangling;
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bad1:
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log_error("The name \"%s\" contains mixed mangled and unmangled "
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"characters or it's already mangled improperly.", str);
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log_error("The %s \"%s\" contains mixed mangled and unmangled "
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"characters or it's already mangled improperly.", str_name, str);
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return -1;
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bad2:
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log_error("Mangled form of the name too long for \"%s\".", str);
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log_error("Mangled form of the %s too long for \"%s\".", str_name, str);
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return -1;
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}
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@ -429,8 +430,8 @@ bad2:
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* Try to unmangle supplied string.
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* Return value: -1 on error, 0 when no unmangling needed, 1 when unmangling applied
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*/
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int unmangle_name(const char *str, size_t len, char *buf,
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size_t buf_len, dm_string_mangling_t mode)
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int unmangle_string(const char *str, const char *str_name, size_t len,
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char *buf, size_t buf_len, dm_string_mangling_t mode)
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{
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int strict = mode != DM_STRING_MANGLING_NONE;
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char str_rest[DM_NAME_LEN];
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@ -446,22 +447,22 @@ int unmangle_name(const char *str, size_t len, char *buf,
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return 0;
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if (buf_len < DM_NAME_LEN) {
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log_error(INTERNAL_ERROR "unmangle_name: supplied buffer too small");
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log_error(INTERNAL_ERROR "unmangle_string: supplied buffer too small");
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return -1;
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}
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for (i = 0, j = 0; str[i]; i++, j++) {
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if (strict && !(_is_whitelisted_char(str[i]) || str[i]=='\\')) {
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log_error("The name \"%s\" should be mangled but "
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"it contains blacklisted characters.", str);
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log_error("The %s \"%s\" should be mangled but "
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"it contains blacklisted characters.", str_name, str);
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j=0; r=-1;
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goto out;
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}
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if (str[i] == '\\' && str[i+1] == 'x') {
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if (!sscanf(&str[i+2], "%2x%s", &code, str_rest)) {
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log_debug("Hex encoding mismatch detected in \"%s\" "
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"while trying to unmangle it.", str);
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log_debug("Hex encoding mismatch detected in %s \"%s\" "
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"while trying to unmangle it.", str_name, str);
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goto out;
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}
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buf[j] = (unsigned char) code;
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@ -496,12 +497,12 @@ static int _dm_task_set_name(struct dm_task *dmt, const char *name,
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return 0;
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}
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if (!check_multiple_mangled_name_allowed(mangling_mode, name))
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if (!check_multiple_mangled_string_allowed(name, "name", mangling_mode))
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return_0;
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if (mangling_mode != DM_STRING_MANGLING_NONE &&
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(r = mangle_name(name, strlen(name), mangled_name,
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sizeof(mangled_name), mangling_mode)) < 0) {
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(r = mangle_string(name, "name", strlen(name), mangled_name,
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sizeof(mangled_name), mangling_mode)) < 0) {
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log_error("Failed to mangle device name \"%s\".", name);
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return 0;
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}
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@ -588,8 +589,8 @@ char *dm_task_get_name_mangled(const struct dm_task *dmt)
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char *rs = NULL;
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int r;
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if ((r = mangle_name(s, strlen(s), buf, sizeof(buf),
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dm_get_name_mangling_mode())) < 0)
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if ((r = mangle_string(s, "name", strlen(s), buf, sizeof(buf),
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dm_get_name_mangling_mode())) < 0)
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log_error("Failed to mangle device name \"%s\".", s);
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else if (!(rs = r ? dm_strdup(buf) : dm_strdup(s)))
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log_error("dm_task_get_name_mangled: dm_strdup failed");
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@ -609,8 +610,8 @@ char *dm_task_get_name_unmangled(const struct dm_task *dmt)
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* is *already* unmangled on ioctl return!
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*/
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if (dm_get_name_mangling_mode() == DM_STRING_MANGLING_NONE &&
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(r = unmangle_name(s, strlen(s), buf, sizeof(buf),
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dm_get_name_mangling_mode())) < 0)
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(r = unmangle_string(s, "name", strlen(s), buf, sizeof(buf),
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dm_get_name_mangling_mode())) < 0)
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log_error("Failed to unmangle device name \"%s\".", s);
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else if (!(rs = r ? dm_strdup(buf) : dm_strdup(s)))
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log_error("dm_task_get_name_unmangled: dm_strdup failed");
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@ -634,12 +635,12 @@ int dm_task_set_newname(struct dm_task *dmt, const char *newname)
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return 0;
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}
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if (!check_multiple_mangled_name_allowed(mangling_mode, newname))
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if (!check_multiple_mangled_string_allowed(newname, "new name", mangling_mode))
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return_0;
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if (mangling_mode != DM_STRING_MANGLING_NONE &&
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(r = mangle_name(newname, strlen(newname), mangled_name,
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sizeof(mangled_name), mangling_mode)) < 0) {
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(r = mangle_string(newname, "new name", strlen(newname), mangled_name,
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sizeof(mangled_name), mangling_mode)) < 0) {
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log_error("Failed to mangle new device name \"%s\"", newname);
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return 0;
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}
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@ -22,13 +22,14 @@
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#define DEV_NAME(dmt) (dmt->mangled_dev_name ? : dmt->dev_name)
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int mangle_name(const char *str, size_t len, char *buf,
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size_t buf_len, dm_string_mangling_t mode);
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int mangle_string(const char *str, const char *str_name, size_t len,
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char *buf, size_t buf_len, dm_string_mangling_t mode);
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int unmangle_name(const char *str, size_t len, char *buf,
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size_t buf_len, dm_string_mangling_t mode);
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int unmangle_string(const char *str, const char *str_name, size_t len,
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char *buf, size_t buf_len, dm_string_mangling_t mode);
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int check_multiple_mangled_name_allowed(dm_string_mangling_t mode, const char *name);
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int check_multiple_mangled_string_allowed(const char *str, const char *str_name,
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dm_string_mangling_t mode);
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struct target *create_target(uint64_t start,
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uint64_t len,
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