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Diffstat (limited to 'zfs/lib/libnvpair/nvpair.c')
-rw-r--r--zfs/lib/libnvpair/nvpair.c287
1 files changed, 264 insertions, 23 deletions
diff --git a/zfs/lib/libnvpair/nvpair.c b/zfs/lib/libnvpair/nvpair.c
index 9b8f51e30..77891bf77 100644
--- a/zfs/lib/libnvpair/nvpair.c
+++ b/zfs/lib/libnvpair/nvpair.c
@@ -20,11 +20,11 @@
*/
/*
- * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
-
+#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/stropts.h>
#include <sys/debug.h>
@@ -37,15 +37,19 @@
#if defined(_KERNEL) && !defined(_BOOT)
#include <sys/varargs.h>
+#include <sys/ddi.h>
+#include <sys/sunddi.h>
#else
#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
#include <strings.h>
#endif
#ifndef offsetof
-#define offsetof(s, m) ((size_t)(&(((s *)0)->m)))
+#define offsetof(s, m) ((size_t)(&(((s *)0)->m)))
#endif
-
+#define skip_whitespace(p) while ((*(p) == ' ') || (*(p) == '\t')) p++
/*
* nvpair.c - Provides kernel & userland interfaces for manipulating
@@ -204,7 +208,7 @@ nv_mem_free(nvpriv_t *nvp, void *buf, size_t size)
static void
nv_priv_init(nvpriv_t *priv, nv_alloc_t *nva, uint32_t stat)
{
- bzero(priv, sizeof (priv));
+ bzero(priv, sizeof (nvpriv_t));
priv->nvp_nva = nva;
priv->nvp_stat = stat;
@@ -398,6 +402,9 @@ i_validate_type_nelem(data_type_t type, uint_t nelem)
case DATA_TYPE_STRING:
case DATA_TYPE_HRTIME:
case DATA_TYPE_NVLIST:
+#if !defined(_KERNEL)
+ case DATA_TYPE_DOUBLE:
+#endif
if (nelem != 1)
return (EINVAL);
break;
@@ -736,6 +743,11 @@ i_get_value_size(data_type_t type, const void *data, uint_t nelem)
case DATA_TYPE_UINT64:
value_sz = sizeof (uint64_t);
break;
+#if !defined(_KERNEL)
+ case DATA_TYPE_DOUBLE:
+ value_sz = sizeof (double);
+ break;
+#endif
case DATA_TYPE_STRING:
if (data == NULL)
value_sz = 0;
@@ -1020,6 +1032,14 @@ nvlist_add_uint64(nvlist_t *nvl, const char *name, uint64_t val)
return (nvlist_add_common(nvl, name, DATA_TYPE_UINT64, 1, &val));
}
+#if !defined(_KERNEL)
+int
+nvlist_add_double(nvlist_t *nvl, const char *name, double val)
+{
+ return (nvlist_add_common(nvl, name, DATA_TYPE_DOUBLE, 1, &val));
+}
+#endif
+
int
nvlist_add_string(nvlist_t *nvl, const char *name, const char *val)
{
@@ -1154,6 +1174,27 @@ nvpair_type(nvpair_t *nvp)
return (NVP_TYPE(nvp));
}
+int
+nvpair_type_is_array(nvpair_t *nvp)
+{
+ data_type_t type = NVP_TYPE(nvp);
+
+ if ((type == DATA_TYPE_BYTE_ARRAY) ||
+ (type == DATA_TYPE_UINT8_ARRAY) ||
+ (type == DATA_TYPE_INT16_ARRAY) ||
+ (type == DATA_TYPE_UINT16_ARRAY) ||
+ (type == DATA_TYPE_INT32_ARRAY) ||
+ (type == DATA_TYPE_UINT32_ARRAY) ||
+ (type == DATA_TYPE_INT64_ARRAY) ||
+ (type == DATA_TYPE_UINT64_ARRAY) ||
+ (type == DATA_TYPE_BOOLEAN_ARRAY) ||
+ (type == DATA_TYPE_STRING_ARRAY) ||
+ (type == DATA_TYPE_NVLIST_ARRAY))
+ return (1);
+ return (0);
+
+}
+
static int
nvpair_value_common(nvpair_t *nvp, data_type_t type, uint_t *nelem, void *data)
{
@@ -1181,6 +1222,9 @@ nvpair_value_common(nvpair_t *nvp, data_type_t type, uint_t *nelem, void *data)
case DATA_TYPE_INT64:
case DATA_TYPE_UINT64:
case DATA_TYPE_HRTIME:
+#if !defined(_KERNEL)
+ case DATA_TYPE_DOUBLE:
+#endif
if (data == NULL)
return (EINVAL);
bcopy(NVP_VALUE(nvp), data,
@@ -1317,6 +1361,14 @@ nvlist_lookup_uint64(nvlist_t *nvl, const char *name, uint64_t *val)
return (nvlist_lookup_common(nvl, name, DATA_TYPE_UINT64, NULL, val));
}
+#if !defined(_KERNEL)
+int
+nvlist_lookup_double(nvlist_t *nvl, const char *name, double *val)
+{
+ return (nvlist_lookup_common(nvl, name, DATA_TYPE_DOUBLE, NULL, val));
+}
+#endif
+
int
nvlist_lookup_string(nvlist_t *nvl, const char *name, char **val)
{
@@ -1451,6 +1503,9 @@ nvlist_lookup_pairs(nvlist_t *nvl, int flag, ...)
case DATA_TYPE_HRTIME:
case DATA_TYPE_STRING:
case DATA_TYPE_NVLIST:
+#if !defined(_KERNEL)
+ case DATA_TYPE_DOUBLE:
+#endif
val = va_arg(ap, void *);
ret = nvlist_lookup_common(nvl, name, type, NULL, val);
break;
@@ -1484,30 +1539,201 @@ nvlist_lookup_pairs(nvlist_t *nvl, int flag, ...)
return (ret);
}
-int
-nvlist_lookup_nvpair(nvlist_t *nvl, const char *name, nvpair_t **ret)
-{
- nvpriv_t *priv;
- nvpair_t *nvp;
- i_nvp_t *curr;
-
- if (name == NULL || nvl == NULL ||
- (priv = (nvpriv_t *)(uintptr_t)nvl->nvl_priv) == NULL)
+/*
+ * Find the 'name'ed nvpair in the nvlist 'nvl'. If 'name' found, the function
+ * returns zero and a pointer to the matching nvpair is returned in '*ret'
+ * (given 'ret' is non-NULL). If 'sep' is specified then 'name' will penitrate
+ * multiple levels of embedded nvlists, with 'sep' as the separator. As an
+ * example, if sep is '.', name might look like: "a" or "a.b" or "a.c[3]" or
+ * "a.d[3].e[1]". This matches the C syntax for array embed (for convience,
+ * code also supports "a.d[3]e[1]" syntax).
+ *
+ * If 'ip' is non-NULL and the last name component is an array, return the
+ * value of the "...[index]" array index in *ip. For an array reference that
+ * is not indexed, *ip will be returned as -1. If there is a syntax error in
+ * 'name', and 'ep' is non-NULL then *ep will be set to point to the location
+ * inside the 'name' string where the syntax error was detected.
+ */
+static int
+nvlist_lookup_nvpair_ei_sep(nvlist_t *nvl, const char *name, const char sep,
+ nvpair_t **ret, int *ip, char **ep)
+{
+ nvpair_t *nvp;
+ const char *np;
+ char *sepp;
+ char *idxp, *idxep;
+ nvlist_t **nva;
+ long idx;
+ int n;
+
+ if (ip)
+ *ip = -1; /* not indexed */
+ if (ep)
+ *ep = NULL;
+
+ if ((nvl == NULL) || (name == NULL))
return (EINVAL);
- if (!(nvl->nvl_nvflag & NV_UNIQUE_NAME))
- return (ENOTSUP);
+ /* step through components of name */
+ for (np = name; np && *np; np = sepp) {
+ /* ensure unique names */
+ if (!(nvl->nvl_nvflag & NV_UNIQUE_NAME))
+ return (ENOTSUP);
- for (curr = priv->nvp_list; curr != NULL; curr = curr->nvi_next) {
- nvp = &curr->nvi_nvp;
+ /* skip white space */
+ skip_whitespace(np);
+ if (*np == 0)
+ break;
- if (strcmp(name, NVP_NAME(nvp)) == 0) {
- *ret = nvp;
- return (0);
+ /* set 'sepp' to end of current component 'np' */
+ if (sep)
+ sepp = strchr(np, sep);
+ else
+ sepp = NULL;
+
+ /* find start of next "[ index ]..." */
+ idxp = strchr(np, '[');
+
+ /* if sepp comes first, set idxp to NULL */
+ if (sepp && idxp && (sepp < idxp))
+ idxp = NULL;
+
+ /*
+ * At this point 'idxp' is set if there is an index
+ * expected for the current component.
+ */
+ if (idxp) {
+ /* set 'n' to length of current 'np' name component */
+ n = idxp++ - np;
+
+ /* keep sepp up to date for *ep use as we advance */
+ skip_whitespace(idxp);
+ sepp = idxp;
+
+ /* determine the index value */
+#if defined(_KERNEL) && !defined(_BOOT)
+ if (ddi_strtol(idxp, &idxep, 0, &idx))
+ goto fail;
+#else
+ idx = strtol(idxp, &idxep, 0);
+#endif
+ if (idxep == idxp)
+ goto fail;
+
+ /* keep sepp up to date for *ep use as we advance */
+ sepp = idxep;
+
+ /* skip white space index value and check for ']' */
+ skip_whitespace(sepp);
+ if (*sepp++ != ']')
+ goto fail;
+
+ /* for embedded arrays, support C syntax: "a[1].b" */
+ skip_whitespace(sepp);
+ if (sep && (*sepp == sep))
+ sepp++;
+ } else if (sepp) {
+ n = sepp++ - np;
+ } else {
+ n = strlen(np);
+ }
+
+ /* trim trailing whitespace by reducing length of 'np' */
+ if (n == 0)
+ goto fail;
+ for (n--; (np[n] == ' ') || (np[n] == '\t'); n--)
+ ;
+ n++;
+
+ /* skip whitespace, and set sepp to NULL if complete */
+ if (sepp) {
+ skip_whitespace(sepp);
+ if (*sepp == 0)
+ sepp = NULL;
+ }
+
+ /*
+ * At this point:
+ * o 'n' is the length of current 'np' component.
+ * o 'idxp' is set if there was an index, and value 'idx'.
+ * o 'sepp' is set to the beginning of the next component,
+ * and set to NULL if we have no more components.
+ *
+ * Search for nvpair with matching component name.
+ */
+ for (nvp = nvlist_next_nvpair(nvl, NULL); nvp != NULL;
+ nvp = nvlist_next_nvpair(nvl, nvp)) {
+
+ /* continue if no match on name */
+ if (strncmp(np, nvpair_name(nvp), n) ||
+ (strlen(nvpair_name(nvp)) != n))
+ continue;
+
+ /* if indexed, verify type is array oriented */
+ if (idxp && !nvpair_type_is_array(nvp))
+ goto fail;
+
+ /*
+ * Full match found, return nvp and idx if this
+ * was the last component.
+ */
+ if (sepp == NULL) {
+ if (ret)
+ *ret = nvp;
+ if (ip && idxp)
+ *ip = (int)idx; /* return index */
+ return (0); /* found */
+ }
+
+ /*
+ * More components: current match must be
+ * of DATA_TYPE_NVLIST or DATA_TYPE_NVLIST_ARRAY
+ * to support going deeper.
+ */
+ if (nvpair_type(nvp) == DATA_TYPE_NVLIST) {
+ nvl = EMBEDDED_NVL(nvp);
+ break;
+ } else if (nvpair_type(nvp) == DATA_TYPE_NVLIST_ARRAY) {
+ (void) nvpair_value_nvlist_array(nvp,
+ &nva, (uint_t *)&n);
+ if ((n < 0) || (idx >= n))
+ goto fail;
+ nvl = nva[idx];
+ break;
+ }
+
+ /* type does not support more levels */
+ goto fail;
}
+ if (nvp == NULL)
+ goto fail; /* 'name' not found */
+
+ /* search for match of next component in embedded 'nvl' list */
}
- return (ENOENT);
+fail: if (ep && sepp)
+ *ep = sepp;
+ return (EINVAL);
+}
+
+/*
+ * Return pointer to nvpair with specified 'name'.
+ */
+int
+nvlist_lookup_nvpair(nvlist_t *nvl, const char *name, nvpair_t **ret)
+{
+ return (nvlist_lookup_nvpair_ei_sep(nvl, name, 0, ret, NULL, NULL));
+}
+
+/*
+ * Determine if named nvpair exists in nvlist (use embedded separator of '.'
+ * and return array index). See nvlist_lookup_nvpair_ei_sep for more detailed
+ * description.
+ */
+int nvlist_lookup_nvpair_embedded_index(nvlist_t *nvl,
+ const char *name, nvpair_t **ret, int *ip, char **ep)
+{
+ return (nvlist_lookup_nvpair_ei_sep(nvl, name, '.', ret, ip, ep));
}
boolean_t
@@ -1591,6 +1817,14 @@ nvpair_value_uint64(nvpair_t *nvp, uint64_t *val)
return (nvpair_value_common(nvp, DATA_TYPE_UINT64, NULL, val));
}
+#if !defined(_KERNEL)
+int
+nvpair_value_double(nvpair_t *nvp, double *val)
+{
+ return (nvpair_value_common(nvp, DATA_TYPE_DOUBLE, NULL, val));
+}
+#endif
+
int
nvpair_value_string(nvpair_t *nvp, char **val)
{
@@ -2728,7 +2962,11 @@ nvs_xdr_nvp_op(nvstream_t *nvs, nvpair_t *nvp)
*/
ret = xdr_longlong_t(xdr, (void *)buf);
break;
-
+#if !defined(_KERNEL)
+ case DATA_TYPE_DOUBLE:
+ ret = xdr_double(xdr, (void *)buf);
+ break;
+#endif
case DATA_TYPE_STRING:
ret = xdr_string(xdr, &buf, buflen - 1);
break;
@@ -2834,6 +3072,9 @@ nvs_xdr_nvp_size(nvstream_t *nvs, nvpair_t *nvp, size_t *size)
case DATA_TYPE_INT64:
case DATA_TYPE_UINT64:
case DATA_TYPE_HRTIME:
+#if !defined(_KERNEL)
+ case DATA_TYPE_DOUBLE:
+#endif
nvp_sz += 8;
break;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-13 03:17:54 +0000