[mirror_zfs-debian.git] / lib / libshare / smb.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 2011,2012 Turbo Fredriksson <turbo@bayour.com>, based on nfs.c
 *                         by Gunnar Beutner
 *
 * This is an addition to the zfs device driver to add, modify and remove SMB
 * shares using the 'net share' command that comes with Samba.

 * TESTING
 * Make sure that samba listens to 'localhost' (127.0.0.1) and that the options
 * 'usershare max shares' and 'usershare owner only' have been rewied/set
 * accordingly (see zfs(8) for information).
 *
 * Once configuration in samba have been done, test that this
 * works with the following three commands (in this case, my ZFS
 * filesystem is called 'share/Test1'):
 *
 *	(root)# net -U root -S 127.0.0.1 usershare add Test1 /share/Test1 \
 *		"Comment: /share/Test1" "Everyone:F"
 *	(root)# net usershare list | grep -i test
 *	(root)# net -U root -S 127.0.0.1 usershare delete Test1
 *
 * The first command will create a user share that gives everyone full access.
 * To limit the access below that, use normal UNIX commands (chmod, chown etc).
 */

#include <time.h>
#include <stdlib.h>
#include <stdio.h>
#include <strings.h>
#include <fcntl.h>
#include <sys/wait.h>
#include <unistd.h>
#include <dirent.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <libzfs.h>
#include <libshare.h>
#include "libshare_impl.h"
#include "smb.h"

static boolean_t smb_available(void);

static sa_fstype_t *smb_fstype;

/**
 * Retrieve the list of SMB shares.
 */
static int
smb_retrieve_shares(void)
{
	int rc = SA_OK;
	char file_path[PATH_MAX], line[512], *token, *key, *value;
	char *dup_value, *path = NULL, *comment = NULL, *name = NULL;
	char *guest_ok = NULL;
	DIR *shares_dir;
	FILE *share_file_fp = NULL;
	struct dirent *directory;
	struct stat eStat;
	smb_share_t *shares, *new_shares = NULL;

	/* opendir(), stat() */
	shares_dir = opendir(SHARE_DIR);
	if (shares_dir == NULL)
		return SA_SYSTEM_ERR;

	/* Go through the directory, looking for shares */
	while ((directory = readdir(shares_dir))) {
		if (directory->d_name[0] == '.')
			continue;

		snprintf(file_path, sizeof (file_path),
			 "%s/%s", SHARE_DIR, directory->d_name);

		if (stat(file_path, &eStat) == -1) {
			rc = SA_SYSTEM_ERR;
			goto out;
		}

		if (!S_ISREG(eStat.st_mode))
			continue;

		if ((share_file_fp = fopen(file_path, "r")) == NULL) {
			rc = SA_SYSTEM_ERR;
			goto out;
		}

		name = strdup(directory->d_name);
		if (name == NULL) {
			 rc = SA_NO_MEMORY;
			 goto out;
		}

		while (fgets(line, sizeof(line), share_file_fp)) {
			if (line[0] == '#')
				continue;

			/* Trim trailing new-line character(s). */
			while (line[strlen(line) - 1] == '\r' ||
			       line[strlen(line) - 1] == '\n')
				line[strlen(line) - 1] = '\0';

			/* Split the line in two, separated by '=' */
			token = strchr(line, '=');
			if (token == NULL)
				continue;

			key = line;
			value = token + 1;
			*token = '\0';

			dup_value = strdup(value);
			if (dup_value == NULL) {
				rc = SA_NO_MEMORY;
				goto out;
			}

			if (strcmp(key, "path") == 0)
				path = dup_value;
			if (strcmp(key, "comment") == 0)
				comment = dup_value;
			if (strcmp(key, "guest_ok") == 0)
				guest_ok = dup_value;

			if (path == NULL || comment == NULL || guest_ok == NULL)
				continue; /* Incomplete share definition */
			else {
				shares = (smb_share_t *)
						malloc(sizeof (smb_share_t));
				if (shares == NULL) {
					rc = SA_NO_MEMORY;
					goto out;
				}

				strncpy(shares->name, name,
					sizeof (shares->name));
				shares->name [sizeof(shares->name)-1] = '\0';

				strncpy(shares->path, path,
					sizeof (shares->path));
				shares->path [sizeof(shares->path)-1] = '\0';

				strncpy(shares->comment, comment,
					sizeof (shares->comment));
				shares->comment[sizeof(shares->comment)-1]='\0';

				shares->guest_ok = atoi(guest_ok);

				shares->next = new_shares;
				new_shares = shares;

				name     = NULL;
				path     = NULL;
				comment  = NULL;
				guest_ok = NULL;
			}
		}

out:
		if (share_file_fp != NULL)
			fclose(share_file_fp);

		free(name);
		free(path);
		free(comment);
		free(guest_ok);
	}
	closedir(shares_dir);

	smb_shares = new_shares;

	return rc;
}

/**
 * Used internally by smb_enable_share to enable sharing for a single host.
 */
static int
smb_enable_share_one(const char *sharename, const char *sharepath)
{
	char *argv[10], *pos;
	char name[SMB_NAME_MAX], comment[SMB_COMMENT_MAX];
	int rc;

	/* Support ZFS share name regexp '[[:alnum:]_-.: ]' */
	strncpy(name, sharename, sizeof(name));
	name [sizeof(name)-1] = '\0';

	pos = name;
	while (*pos != '\0') {
		switch (*pos) {
		case '/':
		case '-':
		case ':':
		case ' ':
			*pos = '_';
		}

		++pos;
	}

	/* CMD: net -S NET_CMD_ARG_HOST usershare add Test1 /share/Test1 \
	 *      "Comment" "Everyone:F" */
	snprintf(comment, sizeof(comment), "Comment: %s", sharepath);

	argv[0]  = NET_CMD_PATH;
	argv[1]  = (char*)"-S";
	argv[2]  = NET_CMD_ARG_HOST;
	argv[3]  = (char*)"usershare";
	argv[4]  = (char*)"add";
	argv[5]  = (char*)name;
	argv[6]  = (char*)sharepath;
	argv[7]  = (char*)comment;
	argv[8] = "Everyone:F";
	argv[9] = NULL;

	rc = libzfs_run_process(argv[0], argv, 0);
	if (rc < 0)
		return SA_SYSTEM_ERR;

	/* Reload the share file */
	(void) smb_retrieve_shares();

	return SA_OK;
}

/**
 * Enables SMB sharing for the specified share.
 */
static int
smb_enable_share(sa_share_impl_t impl_share)
{
	char *shareopts;

	if (!smb_available())
		return SA_SYSTEM_ERR;

	shareopts = FSINFO(impl_share, smb_fstype)->shareopts;
	if (shareopts == NULL) /* on/off */
		return SA_SYSTEM_ERR;

	if (strcmp(shareopts, "off") == 0)
		return SA_OK;

	/* Magic: Enable (i.e., 'create new') share */
	return smb_enable_share_one(impl_share->dataset, impl_share->sharepath);
}

/**
 * Used internally by smb_disable_share to disable sharing for a single host.
 */
static int
smb_disable_share_one(const char *sharename)
{
	int rc;
	char *argv[7];

	/* CMD: net -S NET_CMD_ARG_HOST usershare delete Test1 */
	argv[0] = NET_CMD_PATH;
	argv[1] = (char*)"-S";
	argv[2] = NET_CMD_ARG_HOST;
	argv[3] = (char*)"usershare";
	argv[4] = (char*)"delete";
	argv[5] = strdup(sharename);
	argv[6] = NULL;

	rc = libzfs_run_process(argv[0], argv, 0);
	if (rc < 0)
		return SA_SYSTEM_ERR;
	else
		return SA_OK;
}

/**
 * Disables SMB sharing for the specified share.
 */
static int
smb_disable_share(sa_share_impl_t impl_share)
{
	smb_share_t *shares = smb_shares;

	if (!smb_available()) {
		/*
		 * The share can't possibly be active, so nothing
		 * needs to be done to disable it.
		 */
		return SA_OK;
	}

	while (shares != NULL) {
		if (strcmp(impl_share->sharepath, shares->path) == 0)
			return smb_disable_share_one(shares->name);

		shares = shares->next;
	}

	return SA_OK;
}

/**
 * Checks whether the specified SMB share options are syntactically correct.
 */
static int
smb_validate_shareopts(const char *shareopts)
{
	/* TODO: Accept 'name' and sec/acl (?) */
	if ((strcmp(shareopts, "off") == 0) || (strcmp(shareopts, "on") == 0))
		return SA_OK;

	return SA_SYNTAX_ERR;
}

/**
 * Checks whether a share is currently active.
 */
static boolean_t
smb_is_share_active(sa_share_impl_t impl_share)
{
	if (!smb_available())
		return B_FALSE;

	/* Retrieve the list of (possible) active shares */
	smb_retrieve_shares();

	while (smb_shares != NULL) {
		if (strcmp(impl_share->sharepath, smb_shares->path) == 0)
			return B_TRUE;

		smb_shares = smb_shares->next;
	}

	return B_FALSE;
}

/**
 * Called to update a share's options. A share's options might be out of
 * date if the share was loaded from disk and the "sharesmb" dataset
 * property has changed in the meantime. This function also takes care
 * of re-enabling the share if necessary.
 */
static int
smb_update_shareopts(sa_share_impl_t impl_share, const char *resource,
    const char *shareopts)
{
	char *shareopts_dup;
	boolean_t needs_reshare = B_FALSE;
	char *old_shareopts;

	if(!impl_share)
		return SA_SYSTEM_ERR;

	FSINFO(impl_share, smb_fstype)->active =
	    smb_is_share_active(impl_share);

	old_shareopts = FSINFO(impl_share, smb_fstype)->shareopts;

	if (FSINFO(impl_share, smb_fstype)->active && old_shareopts != NULL &&
		strcmp(old_shareopts, shareopts) != 0) {
		needs_reshare = B_TRUE;
		smb_disable_share(impl_share);
	}

	shareopts_dup = strdup(shareopts);

	if (shareopts_dup == NULL)
		return SA_NO_MEMORY;

	if (old_shareopts != NULL)
		free(old_shareopts);

	FSINFO(impl_share, smb_fstype)->shareopts = shareopts_dup;

	if (needs_reshare)
		smb_enable_share(impl_share);

	return SA_OK;
}

/**
 * Clears a share's SMB options. Used by libshare to
 * clean up shares that are about to be free()'d.
 */
static void
smb_clear_shareopts(sa_share_impl_t impl_share)
{
	free(FSINFO(impl_share, smb_fstype)->shareopts);
	FSINFO(impl_share, smb_fstype)->shareopts = NULL;
}

static const sa_share_ops_t smb_shareops = {
	.enable_share = smb_enable_share,
	.disable_share = smb_disable_share,

	.validate_shareopts = smb_validate_shareopts,
	.update_shareopts = smb_update_shareopts,
	.clear_shareopts = smb_clear_shareopts,
};

/*
 * Provides a convenient wrapper for determining SMB availability
 */
static boolean_t
smb_available(void)
{
	struct stat statbuf;

	if (lstat(SHARE_DIR, &statbuf) != 0 ||
	    !S_ISDIR(statbuf.st_mode))
		return B_FALSE;

	if (access(NET_CMD_PATH, F_OK) != 0)
		return B_FALSE;

	return B_TRUE;
}

/**
 * Initializes the SMB functionality of libshare.
 */
void
libshare_smb_init(void)
{
	smb_fstype = register_fstype("smb", &smb_shareops);
}
Commit	Line	Data
645fb9cc TF	1	/*
	2	* CDDL HEADER START
	3	*
	4	* The contents of this file are subject to the terms of the
	5	* Common Development and Distribution License (the "License").
	6	* You may not use this file except in compliance with the License.
	7	*
	8	* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
	9	* or http://www.opensolaris.org/os/licensing.
	10	* See the License for the specific language governing permissions
	11	* and limitations under the License.
	12	*
	13	* When distributing Covered Code, include this CDDL HEADER in each
	14	* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
	15	* If applicable, add the following below this CDDL HEADER, with the
	16	* fields enclosed by brackets "[]" replaced with your own identifying
	17	* information: Portions Copyright [yyyy] [name of copyright owner]
	18	*
	19	* CDDL HEADER END
	20	*/
	21
	22	/*
	23	* Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
	24	* Copyright (c) 2011,2012 Turbo Fredriksson <turbo@bayour.com>, based on nfs.c
	25	* by Gunnar Beutner
	26	*
	27	* This is an addition to the zfs device driver to add, modify and remove SMB
	28	* shares using the 'net share' command that comes with Samba.
	29
	30	* TESTING
	31	* Make sure that samba listens to 'localhost' (127.0.0.1) and that the options
	32	* 'usershare max shares' and 'usershare owner only' have been rewied/set
	33	* accordingly (see zfs(8) for information).
	34	*
	35	* Once configuration in samba have been done, test that this
	36	* works with the following three commands (in this case, my ZFS
	37	* filesystem is called 'share/Test1'):
	38	*
	39	* (root)# net -U root -S 127.0.0.1 usershare add Test1 /share/Test1 \
	40	* "Comment: /share/Test1" "Everyone:F"
	41	* (root)# net usershare list \| grep -i test
	42	* (root)# net -U root -S 127.0.0.1 usershare delete Test1
	43	*
	44	* The first command will create a user share that gives everyone full access.
	45	* To limit the access below that, use normal UNIX commands (chmod, chown etc).
	46	*/
	47
	48	#include <time.h>
	49	#include <stdlib.h>
	50	#include <stdio.h>
	51	#include <strings.h>
	52	#include <fcntl.h>
	53	#include <sys/wait.h>
	54	#include <unistd.h>
	55	#include <dirent.h>
	56	#include <sys/types.h>
	57	#include <sys/stat.h>
	58	#include <libzfs.h>
	59	#include <libshare.h>
	60	#include "libshare_impl.h"
	61	#include "smb.h"
	62
	63	static boolean_t smb_available(void);
	64
65	static sa_fstype_t *smb_fstype;
66
67	/**
68	* Retrieve the list of SMB shares.
69	*/
70	static int
71	smb_retrieve_shares(void)
72	{
73	int rc = SA_OK;
74	char file_path[PATH_MAX], line[512], token, key, *value;
75	char dup_value, path = NULL, comment = NULL, name = NULL;
76	char *guest_ok = NULL;
77	DIR *shares_dir;
78	FILE *share_file_fp = NULL;
79	struct dirent *directory;
80	struct stat eStat;
81	smb_share_t shares, new_shares = NULL;
82
83	/* opendir(), stat() */
84	shares_dir = opendir(SHARE_DIR);
85	if (shares_dir == NULL)
86	return SA_SYSTEM_ERR;
87
88	/* Go through the directory, looking for shares */
89	while ((directory = readdir(shares_dir))) {
90	if (directory->d_name[0] == '.')
91	continue;
92
93	snprintf(file_path, sizeof (file_path),
94	"%s/%s", SHARE_DIR, directory->d_name);
95
96	if (stat(file_path, &eStat) == -1) {
97	rc = SA_SYSTEM_ERR;
98	goto out;
99	}
100
101	if (!S_ISREG(eStat.st_mode))
102	continue;
103
104	if ((share_file_fp = fopen(file_path, "r")) == NULL) {
105	rc = SA_SYSTEM_ERR;
106	goto out;
107	}
108
109	name = strdup(directory->d_name);
110	if (name == NULL) {
111	rc = SA_NO_MEMORY;
112	goto out;
113	}
114
115	while (fgets(line, sizeof(line), share_file_fp)) {
116	if (line[0] == '#')
117	continue;
118
119	/* Trim trailing new-line character(s). */
120	while (line[strlen(line) - 1] == '\r' \|\|
121	line[strlen(line) - 1] == '\n')
122	line[strlen(line) - 1] = '\0';
123
124	/* Split the line in two, separated by '=' */
125	token = strchr(line, '=');
126	if (token == NULL)
127	continue;
128
129	key = line;
130	value = token + 1;
131	*token = '\0';
132
133	dup_value = strdup(value);
134	if (dup_value == NULL) {
135	rc = SA_NO_MEMORY;
136	goto out;
137	}
138
139	if (strcmp(key, "path") == 0)
140	path = dup_value;
141	if (strcmp(key, "comment") == 0)
142	comment = dup_value;
143	if (strcmp(key, "guest_ok") == 0)
144	guest_ok = dup_value;
145
146	if (path == NULL \|\| comment == NULL \|\| guest_ok == NULL)
147	continue; /* Incomplete share definition */
148	else {
149	shares = (smb_share_t *)
150	malloc(sizeof (smb_share_t));
151	if (shares == NULL) {
152	rc = SA_NO_MEMORY;
153	goto out;
154	}
155
156	strncpy(shares->name, name,
157	sizeof (shares->name));
158	shares->name [sizeof(shares->name)-1] = '\0';
159
160	strncpy(shares->path, path,
161	sizeof (shares->path));
162	shares->path [sizeof(shares->path)-1] = '\0';
163
164	strncpy(shares->comment, comment,
165	sizeof (shares->comment));
166	shares->comment[sizeof(shares->comment)-1]='\0';
167
168	shares->guest_ok = atoi(guest_ok);
169
170	shares->next = new_shares;
171	new_shares = shares;
172
173	name = NULL;
174	path = NULL;
175	comment = NULL;
176	guest_ok = NULL;
177	}
178	}
179
180	out:
181	if (share_file_fp != NULL)
182	fclose(share_file_fp);
183
184	free(name);
185	free(path);
186	free(comment);
187	free(guest_ok);
188	}
189	closedir(shares_dir);
190
191	smb_shares = new_shares;
192
193	return rc;
194	}
195
196	/**
197	* Used internally by smb_enable_share to enable sharing for a single host.
198	*/
199	static int
200	smb_enable_share_one(const char sharename, const char sharepath)
201	{
202	char argv[10], pos;
203	char name[SMB_NAME_MAX], comment[SMB_COMMENT_MAX];
204	int rc;
205
206	/* Support ZFS share name regexp '[[:alnum:]_-.: ]' */
207	strncpy(name, sharename, sizeof(name));
208	name [sizeof(name)-1] = '\0';
209
210	pos = name;
211	while (*pos != '\0') {
212	switch (*pos) {
213	case '/':
214	case '-':
215	case ':':
216	case ' ':
217	*pos = '_';
218	}
219
220	++pos;
221	}
222
223	/* CMD: net -S NET_CMD_ARG_HOST usershare add Test1 /share/Test1 \
224	* "Comment" "Everyone:F" */
225	snprintf(comment, sizeof(comment), "Comment: %s", sharepath);
226
227	argv[0] = NET_CMD_PATH;
228	argv[1] = (char*)"-S";
229	argv[2] = NET_CMD_ARG_HOST;
230	argv[3] = (char*)"usershare";
231	argv[4] = (char*)"add";
232	argv[5] = (char*)name;
233	argv[6] = (char*)sharepath;
234	argv[7] = (char*)comment;
235	argv[8] = "Everyone:F";
236	argv[9] = NULL;
237
238	rc = libzfs_run_process(argv[0], argv, 0);
239	if (rc < 0)
240	return SA_SYSTEM_ERR;
241
242	/* Reload the share file */
243	(void) smb_retrieve_shares();
244
245	return SA_OK;
246	}
247
248	/**
249	* Enables SMB sharing for the specified share.
250	*/
251	static int
252	smb_enable_share(sa_share_impl_t impl_share)
253	{
254	char *shareopts;
255
256	if (!smb_available())
257	return SA_SYSTEM_ERR;
258
259	shareopts = FSINFO(impl_share, smb_fstype)->shareopts;
260	if (shareopts == NULL) /* on/off */
261	return SA_SYSTEM_ERR;
262
263	if (strcmp(shareopts, "off") == 0)
264	return SA_OK;
265
266	/* Magic: Enable (i.e., 'create new') share */
267	return smb_enable_share_one(impl_share->dataset, impl_share->sharepath);
268	}
269
270	/**
271	* Used internally by smb_disable_share to disable sharing for a single host.
272	*/
273	static int
274	smb_disable_share_one(const char *sharename)
275	{
276	int rc;
277	char *argv[7];
278
279	/* CMD: net -S NET_CMD_ARG_HOST usershare delete Test1 */
280	argv[0] = NET_CMD_PATH;
281	argv[1] = (char*)"-S";
282	argv[2] = NET_CMD_ARG_HOST;
283	argv[3] = (char*)"usershare";
284	argv[4] = (char*)"delete";
285	argv[5] = strdup(sharename);
286	argv[6] = NULL;
287
288	rc = libzfs_run_process(argv[0], argv, 0);
289	if (rc < 0)
290	return SA_SYSTEM_ERR;
291	else
292	return SA_OK;
293	}
294
295	/**
296	* Disables SMB sharing for the specified share.
297	*/
298	static int
299	smb_disable_share(sa_share_impl_t impl_share)
300	{
301	smb_share_t *shares = smb_shares;
302
303	if (!smb_available()) {
304	/*
305	* The share can't possibly be active, so nothing
306	* needs to be done to disable it.
307	*/
308	return SA_OK;
309	}
310
311	while (shares != NULL) {
312	if (strcmp(impl_share->sharepath, shares->path) == 0)
313	return smb_disable_share_one(shares->name);
314
315	shares = shares->next;
316	}
317
318	return SA_OK;
319	}
320
321	/**
322	* Checks whether the specified SMB share options are syntactically correct.
323	*/
324	static int
325	smb_validate_shareopts(const char *shareopts)
326	{
327	/* TODO: Accept 'name' and sec/acl (?) */
328	if ((strcmp(shareopts, "off") == 0) \|\| (strcmp(shareopts, "on") == 0))
329	return SA_OK;
330
331	return SA_SYNTAX_ERR;
332	}
333
334	/**
335	* Checks whether a share is currently active.
336	*/
337	static boolean_t
338	smb_is_share_active(sa_share_impl_t impl_share)
339	{
340	if (!smb_available())
341	return B_FALSE;
342
343	/* Retrieve the list of (possible) active shares */
344	smb_retrieve_shares();
345
346	while (smb_shares != NULL) {
347	if (strcmp(impl_share->sharepath, smb_shares->path) == 0)
348	return B_TRUE;
349
350	smb_shares = smb_shares->next;
351	}
352
353	return B_FALSE;
354	}
355
356	/**
357	* Called to update a share's options. A share's options might be out of
358	* date if the share was loaded from disk and the "sharesmb" dataset
359	* property has changed in the meantime. This function also takes care
360	* of re-enabling the share if necessary.
361	*/
362	static int
363	smb_update_shareopts(sa_share_impl_t impl_share, const char *resource,
364	const char *shareopts)
365	{
366	char *shareopts_dup;
367	boolean_t needs_reshare = B_FALSE;
368	char *old_shareopts;
369
370	if(!impl_share)
371	return SA_SYSTEM_ERR;
372
373	FSINFO(impl_share, smb_fstype)->active =
374	smb_is_share_active(impl_share);
375
376	old_shareopts = FSINFO(impl_share, smb_fstype)->shareopts;
377
378	if (FSINFO(impl_share, smb_fstype)->active && old_shareopts != NULL &&
379	strcmp(old_shareopts, shareopts) != 0) {
380	needs_reshare = B_TRUE;
381	smb_disable_share(impl_share);
382	}
383
384	shareopts_dup = strdup(shareopts);
385
386	if (shareopts_dup == NULL)
387	return SA_NO_MEMORY;
388
389	if (old_shareopts != NULL)
390	free(old_shareopts);
391
392	FSINFO(impl_share, smb_fstype)->shareopts = shareopts_dup;
393
394	if (needs_reshare)
395	smb_enable_share(impl_share);
396
397	return SA_OK;
398	}
399
400	/**
401	* Clears a share's SMB options. Used by libshare to
402	* clean up shares that are about to be free()'d.
403	*/
404	static void
405	smb_clear_shareopts(sa_share_impl_t impl_share)
406	{
407	free(FSINFO(impl_share, smb_fstype)->shareopts);
408	FSINFO(impl_share, smb_fstype)->shareopts = NULL;
409	}
410
411	static const sa_share_ops_t smb_shareops = {
412	.enable_share = smb_enable_share,
413	.disable_share = smb_disable_share,
414
415	.validate_shareopts = smb_validate_shareopts,
416	.update_shareopts = smb_update_shareopts,
417	.clear_shareopts = smb_clear_shareopts,
418	};
419
420	/*
421	* Provides a convenient wrapper for determining SMB availability
422	*/
423	static boolean_t
424	smb_available(void)
425	{
c06d4368 AX	426	struct stat statbuf;
	427
	428	if (lstat(SHARE_DIR, &statbuf) != 0 \|\|
	429	!S_ISDIR(statbuf.st_mode))
	430	return B_FALSE;
	431
	432	if (access(NET_CMD_PATH, F_OK) != 0)
	433	return B_FALSE;
	434
645fb9cc TF	435	return B_TRUE;
	436	}
	437
	438	/**
	439	* Initializes the SMB functionality of libshare.
	440	*/
	441	void
	442	libshare_smb_init(void)
	443	{
	444	smb_fstype = register_fstype("smb", &smb_shareops);
	445	}