WebSVN – HelenOS – Diff – /trunk/uspace/srv/fs/devfs/devfs_ops.c


/*
 * Copyright (c) 2009 Martin Decky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
/** @addtogroup fs
 * @{
 */
 
/**
 * @file devfs_ops.c
 * @brief Implementation of VFS operations for the devfs file system server.
 */
 
#include <ipc/ipc.h>
#include <bool.h>
#include <errno.h>
#include <malloc.h>
#include <string.h>
#include <libfs.h>
#include <fibril_sync.h>
#include <adt/hash_table.h>
#include "devfs.h"
#include "devfs_ops.h"
 
#define PLB_GET_CHAR(pos)  (devfs_reg.plb_ro[pos % PLB_SIZE])
 
/** Opened devices structure */
typedef struct {
    dev_handle_t handle;
    int phone;
    size_t refcount;
    link_t link;
} device_t;
 
/** Hash table of opened devices */
static hash_table_t devices;
 
/** Hash table mutex */
static FIBRIL_MUTEX_INITIALIZE(devices_mutex);
 
#define DEVICES_KEYS        1
#define DEVICES_KEY_HANDLE  0
#define DEVICES_BUCKETS     256
 
/* Implementation of hash table interface for the nodes hash table. */
static hash_index_t devices_hash(unsigned long key[])
{
    return key[DEVICES_KEY_HANDLE] % DEVICES_BUCKETS;
}
 
static int devices_compare(unsigned long key[], hash_count_t keys, link_t *item)
{
    device_t *dev = hash_table_get_instance(item, device_t, link);
    return (dev->handle == (dev_handle_t) key[DEVICES_KEY_HANDLE]);
}
 
static void devices_remove_callback(link_t *item)
{
    free(hash_table_get_instance(item, device_t, link));
}
 
static hash_table_operations_t devices_ops = {
    .hash = devices_hash,
    .compare = devices_compare,
    .remove_callback = devices_remove_callback
};
 
bool devfs_init(void)
{
    if (!hash_table_create(&devices, DEVICES_BUCKETS,
        DEVICES_KEYS, &devices_ops))
        return false;
   
    if (devmap_get_phone(DEVMAP_CLIENT, IPC_FLAG_BLOCKING) < 0)
        return false;
   
    return true;
}
 
void devfs_mounted(ipc_callid_t rid, ipc_call_t *request)
{
    /* Accept the mount options */
    ipc_callid_t callid;
    size_t size;
    if (!ipc_data_write_receive(&callid, &size)) {
        ipc_answer_0(callid, EINVAL);
        ipc_answer_0(rid, EINVAL);
        return;
    }
   
    char *opts = malloc(size + 1);
    if (!opts) {
        ipc_answer_0(callid, ENOMEM);
        ipc_answer_0(rid, ENOMEM);
        return;
    }
   
    ipcarg_t retval = ipc_data_write_finalize(callid, opts, size);
    if (retval != EOK) {
        ipc_answer_0(rid, retval);
        free(opts);
        return;
    }
   
    free(opts);
   
    ipc_answer_3(rid, EOK, 0, 0, 0);
}
 
void devfs_mount(ipc_callid_t rid, ipc_call_t *request)
{
    ipc_answer_0(rid, ENOTSUP);
}
 
void devfs_lookup(ipc_callid_t rid, ipc_call_t *request)
{
    ipcarg_t first = IPC_GET_ARG1(*request);
    ipcarg_t last = IPC_GET_ARG2(*request);
    dev_handle_t dev_handle = IPC_GET_ARG3(*request);
    ipcarg_t lflag = IPC_GET_ARG4(*request);
    fs_index_t index = IPC_GET_ARG5(*request);
   
    /* Hierarchy is flat, no altroot is supported */
    if (index != 0) {
        ipc_answer_0(rid, ENOENT);
        return;
    }
   
    if ((lflag & L_LINK) || (lflag & L_UNLINK)) {
        ipc_answer_0(rid, ENOTSUP);
        return;
    }
   
    /* Eat slash */
    if (PLB_GET_CHAR(first) == '/') {
        first++;
        first %= PLB_SIZE;
    }
   
    if (first >= last) {
        /* Root entry */
        if (lflag & L_DIRECTORY)
            ipc_answer_5(rid, EOK, devfs_reg.fs_handle, dev_handle, 0, 0, 0);
        else
            ipc_answer_0(rid, ENOENT);
    } else {
        if (lflag & L_FILE) {
            size_t len;
            if (last >= first)
                len = last - first + 1;
            else
                len = first + PLB_SIZE - last + 1;
           
            char *name = (char *) malloc(len + 1);
            if (name == NULL) {
                ipc_answer_0(rid, ENOMEM);
                return;
            }
           
            size_t i;
            for (i = 0; i < len; i++)
                name[i] = PLB_GET_CHAR(first + i);
           
            name[len] = 0;
           
            dev_handle_t handle;
            if (devmap_device_get_handle(name, &handle, 0) != EOK) {
                free(name);
                ipc_answer_0(rid, ENOENT);
                return;
            }
           
            if (lflag & L_OPEN) {
                unsigned long key[] = {
                    [DEVICES_KEY_HANDLE] = (unsigned long) handle
                };
               
                fibril_mutex_lock(&devices_mutex);
                link_t *lnk = hash_table_find(&devices, key);
                if (lnk == NULL) {
                    int phone = devmap_device_connect(handle, 0);
                    if (phone < 0) {
                        fibril_mutex_unlock(&devices_mutex);
                        free(name);
                        ipc_answer_0(rid, ENOENT);
                        return;
                    }
                   
                    device_t *dev = (device_t *) malloc(sizeof(device_t));
                    if (dev == NULL) {
                        fibril_mutex_unlock(&devices_mutex);
                        free(name);
                        ipc_answer_0(rid, ENOMEM);
                        return;
                    }
                   
                    dev->handle = handle;
                    dev->phone = phone;
                    dev->refcount = 1;
                   
                    hash_table_insert(&devices, key, &dev->link);
                } else {
                    device_t *dev = hash_table_get_instance(lnk, device_t, link);
                    dev->refcount++;
                }
                fibril_mutex_unlock(&devices_mutex);
            }
           
            free(name);
           
            ipc_answer_5(rid, EOK, devfs_reg.fs_handle, dev_handle, handle, 0, 1);
        } else
            ipc_answer_0(rid, ENOENT);
    }
}
 
void devfs_open_node(ipc_callid_t rid, ipc_call_t *request)
{
    dev_handle_t handle = IPC_GET_ARG2(*request);
   
    unsigned long key[] = {
        [DEVICES_KEY_HANDLE] = (unsigned long) handle
    };
   
    fibril_mutex_lock(&devices_mutex);
    link_t *lnk = hash_table_find(&devices, key);
    if (lnk == NULL) {
        int phone = devmap_device_connect(handle, 0);
        if (phone < 0) {
            fibril_mutex_unlock(&devices_mutex);
            ipc_answer_0(rid, ENOENT);
            return;
        }
       
        device_t *dev = (device_t *) malloc(sizeof(device_t));
        if (dev == NULL) {
            fibril_mutex_unlock(&devices_mutex);
            ipc_answer_0(rid, ENOMEM);
            return;
        }
       
        dev->handle = handle;
        dev->phone = phone;
        dev->refcount = 1;
       
        hash_table_insert(&devices, key, &dev->link);
    } else {
        device_t *dev = hash_table_get_instance(lnk, device_t, link);
        dev->refcount++;
    }
    fibril_mutex_unlock(&devices_mutex);
   
    ipc_answer_3(rid, EOK, 0, 1, L_FILE);
}
 
void devfs_device(ipc_callid_t rid, ipc_call_t *request)
{
    fs_index_t index = (fs_index_t) IPC_GET_ARG2(*request);
   
    if (index != 0) {
        unsigned long key[] = {
            [DEVICES_KEY_HANDLE] = (unsigned long) index
        };
       
        fibril_mutex_lock(&devices_mutex);
        link_t *lnk = hash_table_find(&devices, key);
        if (lnk == NULL) {
            fibril_mutex_unlock(&devices_mutex);
            ipc_answer_0(rid, ENOENT);
            return;
        }
        fibril_mutex_unlock(&devices_mutex);
       
        ipc_answer_1(rid, EOK, (ipcarg_t) index);
    } else
        ipc_answer_0(rid, ENOTSUP);
}
 
void devfs_read(ipc_callid_t rid, ipc_call_t *request)
{
    fs_index_t index = (fs_index_t) IPC_GET_ARG2(*request);
    off_t pos = (off_t) IPC_GET_ARG3(*request);
   
    if (index != 0) {
        unsigned long key[] = {
            [DEVICES_KEY_HANDLE] = (unsigned long) index
        };
       
        fibril_mutex_lock(&devices_mutex);
        link_t *lnk = hash_table_find(&devices, key);
        if (lnk == NULL) {
            fibril_mutex_unlock(&devices_mutex);
            ipc_answer_0(rid, ENOENT);
            return;
        }
       
        device_t *dev = hash_table_get_instance(lnk, device_t, link);
       
        ipc_callid_t callid;
        if (!ipc_data_read_receive(&callid, NULL)) {
            fibril_mutex_unlock(&devices_mutex);
            ipc_answer_0(callid, EINVAL);
            ipc_answer_0(rid, EINVAL);
            return;
        }
       
        /* Make a request at the driver */
        ipc_call_t answer;
        aid_t msg = async_send_3(dev->phone, IPC_GET_METHOD(*request),
            IPC_GET_ARG1(*request), IPC_GET_ARG2(*request),
            IPC_GET_ARG3(*request), &answer);
       
        /* Forward the IPC_M_DATA_READ request to the driver */
        ipc_forward_fast(callid, dev->phone, 0, 0, 0, IPC_FF_ROUTE_FROM_ME);
        fibril_mutex_unlock(&devices_mutex);
       
        /* Wait for reply from the driver. */
        ipcarg_t rc;
        async_wait_for(msg, &rc);
        size_t bytes = IPC_GET_ARG1(answer);
       
        /* Driver reply is the final result of the whole operation */
        ipc_answer_1(rid, rc, bytes);
    } else {
        ipc_callid_t callid;
        size_t size;
        if (!ipc_data_read_receive(&callid, &size)) {
            ipc_answer_0(callid, EINVAL);
            ipc_answer_0(rid, EINVAL);
            return;
        }
       
        size_t count = devmap_device_get_count();
        dev_desc_t *desc = malloc(count * sizeof(dev_desc_t));
        if (desc == NULL) {
            ipc_answer_0(callid, ENOMEM);
            ipc_answer_1(rid, ENOMEM, 0);
            return;
        }
       
        size_t max = devmap_device_get_devices(count, desc);
       
        if (pos < max) {
            ipc_data_read_finalize(callid, desc[pos].name, str_size(desc[pos].name) + 1);
        } else {
            ipc_answer_0(callid, ENOENT);
            ipc_answer_1(rid, ENOENT, 0);
            return;
        }
       
        free(desc);
       
        ipc_answer_1(rid, EOK, 1);
    }
}
 
void devfs_write(ipc_callid_t rid, ipc_call_t *request)
{
    fs_index_t index = (fs_index_t) IPC_GET_ARG2(*request);
    off_t pos = (off_t) IPC_GET_ARG3(*request);
   
    if (index != 0) {
        unsigned long key[] = {
            [DEVICES_KEY_HANDLE] = (unsigned long) index
        };
       
        fibril_mutex_lock(&devices_mutex);
        link_t *lnk = hash_table_find(&devices, key);
        if (lnk == NULL) {
            fibril_mutex_unlock(&devices_mutex);
            ipc_answer_0(rid, ENOENT);
            return;
        }
       
        device_t *dev = hash_table_get_instance(lnk, device_t, link);
       
        ipc_callid_t callid;
        if (!ipc_data_write_receive(&callid, NULL)) {
            fibril_mutex_unlock(&devices_mutex);
            ipc_answer_0(callid, EINVAL);
            ipc_answer_0(rid, EINVAL);
            return;
        }
       
        /* Make a request at the driver */
        ipc_call_t answer;
        aid_t msg = async_send_3(dev->phone, IPC_GET_METHOD(*request),
            IPC_GET_ARG1(*request), IPC_GET_ARG2(*request),
            IPC_GET_ARG3(*request), &answer);
       
        /* Forward the IPC_M_DATA_WRITE request to the driver */
        ipc_forward_fast(callid, dev->phone, 0, 0, 0, IPC_FF_ROUTE_FROM_ME);
       
        fibril_mutex_unlock(&devices_mutex);
       
        /* Wait for reply from the driver. */
        ipcarg_t rc;
        async_wait_for(msg, &rc);
        size_t bytes = IPC_GET_ARG1(answer);
       
        /* Driver reply is the final result of the whole operation */
        ipc_answer_1(rid, rc, bytes);
    } else {
        /* Read-only filesystem */
        ipc_answer_0(rid, ENOTSUP);
    }
}
 
void devfs_truncate(ipc_callid_t rid, ipc_call_t *request)
{
    ipc_answer_0(rid, ENOTSUP);
}
 
void devfs_close(ipc_callid_t rid, ipc_call_t *request)
{
    fs_index_t index = (fs_index_t) IPC_GET_ARG2(*request);
   
    if (index != 0) {
        unsigned long key[] = {
            [DEVICES_KEY_HANDLE] = (unsigned long) index
        };
       
        fibril_mutex_lock(&devices_mutex);
        link_t *lnk = hash_table_find(&devices, key);
        if (lnk == NULL) {
            fibril_mutex_unlock(&devices_mutex);
            ipc_answer_0(rid, ENOENT);
            return;
        }
       
        device_t *dev = hash_table_get_instance(lnk, device_t, link);
        dev->refcount--;
       
        if (dev->refcount == 0) {
            ipc_hangup(dev->phone);
            hash_table_remove(&devices, key, DEVICES_KEYS);
        }
       
        fibril_mutex_unlock(&devices_mutex);
       
        ipc_answer_0(rid, EOK);
    } else
        ipc_answer_0(rid, ENOTSUP);
}
 
void devfs_sync(ipc_callid_t rid, ipc_call_t *request)
{
    fs_index_t index = (fs_index_t) IPC_GET_ARG2(*request);
   
    if (index != 0) {
        unsigned long key[] = {
            [DEVICES_KEY_HANDLE] = (unsigned long) index
        };
       
        fibril_mutex_lock(&devices_mutex);
        link_t *lnk = hash_table_find(&devices, key);
        if (lnk == NULL) {
            fibril_mutex_unlock(&devices_mutex);
            ipc_answer_0(rid, ENOENT);
            return;
        }
       
        device_t *dev = hash_table_get_instance(lnk, device_t, link);
       
        /* Make a request at the driver */
        ipc_call_t answer;
        aid_t msg = async_send_2(dev->phone, IPC_GET_METHOD(*request),
            IPC_GET_ARG1(*request), IPC_GET_ARG2(*request), &answer);
       
        fibril_mutex_unlock(&devices_mutex);
       
        /* Wait for reply from the driver */
        ipcarg_t rc;
        async_wait_for(msg, &rc);
       
        /* Driver reply is the final result of the whole operation */
        ipc_answer_0(rid, rc);
    } else
        ipc_answer_0(rid, ENOTSUP);
}
 
void devfs_destroy(ipc_callid_t rid, ipc_call_t *request)
{
    ipc_answer_0(rid, ENOTSUP);
}
 
/**
 * @}
 */
 

Rev 4509	Rev 4561
1	/*	1	/*
2	* Copyright (c) 2009 Martin Decky	2	* Copyright (c) 2009 Martin Decky
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup fs	29	/** @addtogroup fs
30	* @{	30	* @{
31	*/	31	*/
32		32
33	/**	33	/**
34	* @file devfs_ops.c	34	* @file devfs_ops.c
35	* @brief Implementation of VFS operations for the devfs file system server.	35	* @brief Implementation of VFS operations for the devfs file system server.
36	*/	36	*/
37		37
38	#include <ipc/ipc.h>	38	#include <ipc/ipc.h>
39	#include <bool.h>	39	#include <bool.h>
40	#include <errno.h>	40	#include <errno.h>
41	#include <malloc.h>	41	#include <malloc.h>
42	#include <string.h>	42	#include <string.h>
43	#include <libfs.h>	43	#include <libfs.h>
-		44	#include <fibril_sync.h>
44	#include <adt/hash_table.h>	45	#include <adt/hash_table.h>
45	#include "devfs.h"	46	#include "devfs.h"
46	#include "devfs_ops.h"	47	#include "devfs_ops.h"
47		48
48	#define PLB_GET_CHAR(pos) (devfs_reg.plb_ro[pos % PLB_SIZE])	49	#define PLB_GET_CHAR(pos) (devfs_reg.plb_ro[pos % PLB_SIZE])
49		50
50	/** Opened devices structure */	51	/** Opened devices structure */
51	typedef struct {	52	typedef struct {
52	dev_handle_t handle;	53	dev_handle_t handle;
53	int phone;	54	int phone;
54	size_t refcount;	55	size_t refcount;
55	link_t link;	56	link_t link;
56	} device_t;	57	} device_t;
57		58
58	/** Hash table of opened devices */	59	/** Hash table of opened devices */
59	static hash_table_t devices;	60	static hash_table_t devices;
60		61
-		62	/** Hash table mutex */
-		63	static FIBRIL_MUTEX_INITIALIZE(devices_mutex);
-		64
61	#define DEVICES_KEYS 1	65	#define DEVICES_KEYS 1
62	#define DEVICES_KEY_HANDLE 0	66	#define DEVICES_KEY_HANDLE 0
63	#define DEVICES_BUCKETS 256	67	#define DEVICES_BUCKETS 256
64		68
65	/* Implementation of hash table interface for the nodes hash table. */	69	/* Implementation of hash table interface for the nodes hash table. */
66	static hash_index_t devices_hash(unsigned long key[])	70	static hash_index_t devices_hash(unsigned long key[])
67	{	71	{
68	return key[DEVICES_KEY_HANDLE] % DEVICES_BUCKETS;	72	return key[DEVICES_KEY_HANDLE] % DEVICES_BUCKETS;
69	}	73	}
70		74
71	static int devices_compare(unsigned long key[], hash_count_t keys, link_t *item)	75	static int devices_compare(unsigned long key[], hash_count_t keys, link_t *item)
72	{	76	{
73	device_t *dev = hash_table_get_instance(item, device_t, link);	77	device_t *dev = hash_table_get_instance(item, device_t, link);
74	return (dev->handle == (dev_handle_t) key[DEVICES_KEY_HANDLE]);	78	return (dev->handle == (dev_handle_t) key[DEVICES_KEY_HANDLE]);
75	}	79	}
76		80
77	static void devices_remove_callback(link_t *item)	81	static void devices_remove_callback(link_t *item)
78	{	82	{
79	free(hash_table_get_instance(item, device_t, link));	83	free(hash_table_get_instance(item, device_t, link));
80	}	84	}
81		85
82	static hash_table_operations_t devices_ops = {	86	static hash_table_operations_t devices_ops = {
83	.hash = devices_hash,	87	.hash = devices_hash,
84	.compare = devices_compare,	88	.compare = devices_compare,
85	.remove_callback = devices_remove_callback	89	.remove_callback = devices_remove_callback
86	};	90	};
87		91
88	bool devfs_init(void)	92	bool devfs_init(void)
89	{	93	{
90	if (!hash_table_create(&devices, DEVICES_BUCKETS,	94	if (!hash_table_create(&devices, DEVICES_BUCKETS,
91	DEVICES_KEYS, &devices_ops))	95	DEVICES_KEYS, &devices_ops))
92	return false;	96	return false;
93		97
94	if (devmap_get_phone(DEVMAP_CLIENT, IPC_FLAG_BLOCKING) < 0)	98	if (devmap_get_phone(DEVMAP_CLIENT, IPC_FLAG_BLOCKING) < 0)
95	return false;	99	return false;
96		100
97	return true;	101	return true;
98	}	102	}
99		103
100	void devfs_mounted(ipc_callid_t rid, ipc_call_t *request)	104	void devfs_mounted(ipc_callid_t rid, ipc_call_t *request)
101	{	105	{
102	/* Accept the mount options */	106	/* Accept the mount options */
103	ipc_callid_t callid;	107	ipc_callid_t callid;
104	size_t size;	108	size_t size;
105	if (!ipc_data_write_receive(&callid, &size)) {	109	if (!ipc_data_write_receive(&callid, &size)) {
106	ipc_answer_0(callid, EINVAL);	110	ipc_answer_0(callid, EINVAL);
107	ipc_answer_0(rid, EINVAL);	111	ipc_answer_0(rid, EINVAL);
108	return;	112	return;
109	}	113	}
110		114
111	char *opts = malloc(size + 1);	115	char *opts = malloc(size + 1);
112	if (!opts) {	116	if (!opts) {
113	ipc_answer_0(callid, ENOMEM);	117	ipc_answer_0(callid, ENOMEM);
114	ipc_answer_0(rid, ENOMEM);	118	ipc_answer_0(rid, ENOMEM);
115	return;	119	return;
116	}	120	}
117		121
118	ipcarg_t retval = ipc_data_write_finalize(callid, opts, size);	122	ipcarg_t retval = ipc_data_write_finalize(callid, opts, size);
119	if (retval != EOK) {	123	if (retval != EOK) {
120	ipc_answer_0(rid, retval);	124	ipc_answer_0(rid, retval);
121	free(opts);	125	free(opts);
122	return;	126	return;
123	}	127	}
124		128
125	free(opts);	129	free(opts);
126		130
127	ipc_answer_3(rid, EOK, 0, 0, 0);	131	ipc_answer_3(rid, EOK, 0, 0, 0);
128	}	132	}
129		133
130	void devfs_mount(ipc_callid_t rid, ipc_call_t *request)	134	void devfs_mount(ipc_callid_t rid, ipc_call_t *request)
131	{	135	{
132	ipc_answer_0(rid, ENOTSUP);	136	ipc_answer_0(rid, ENOTSUP);
133	}	137	}
134		138
135	void devfs_lookup(ipc_callid_t rid, ipc_call_t *request)	139	void devfs_lookup(ipc_callid_t rid, ipc_call_t *request)
136	{	140	{
137	ipcarg_t first = IPC_GET_ARG1(*request);	141	ipcarg_t first = IPC_GET_ARG1(*request);
138	ipcarg_t last = IPC_GET_ARG2(*request);	142	ipcarg_t last = IPC_GET_ARG2(*request);
139	dev_handle_t dev_handle = IPC_GET_ARG3(*request);	143	dev_handle_t dev_handle = IPC_GET_ARG3(*request);
140	ipcarg_t lflag = IPC_GET_ARG4(*request);	144	ipcarg_t lflag = IPC_GET_ARG4(*request);
141	fs_index_t index = IPC_GET_ARG5(*request);	145	fs_index_t index = IPC_GET_ARG5(*request);
142		146
143	/* Hierarchy is flat, no altroot is supported */	147	/* Hierarchy is flat, no altroot is supported */
144	if (index != 0) {	148	if (index != 0) {
145	ipc_answer_0(rid, ENOENT);	149	ipc_answer_0(rid, ENOENT);
146	return;	150	return;
147	}	151	}
148		152
149	if ((lflag & L_LINK) \|\| (lflag & L_UNLINK)) {	153	if ((lflag & L_LINK) \|\| (lflag & L_UNLINK)) {
150	ipc_answer_0(rid, ENOTSUP);	154	ipc_answer_0(rid, ENOTSUP);
151	return;	155	return;
152	}	156	}
153		157
154	/* Eat slash */	158	/* Eat slash */
155	if (PLB_GET_CHAR(first) == '/') {	159	if (PLB_GET_CHAR(first) == '/') {
156	first++;	160	first++;
157	first %= PLB_SIZE;	161	first %= PLB_SIZE;
158	}	162	}
159		163
160	if (first >= last) {	164	if (first >= last) {
161	/* Root entry */	165	/* Root entry */
162	if (lflag & L_DIRECTORY)	166	if (lflag & L_DIRECTORY)
163	ipc_answer_5(rid, EOK, devfs_reg.fs_handle, dev_handle, 0, 0, 0);	167	ipc_answer_5(rid, EOK, devfs_reg.fs_handle, dev_handle, 0, 0, 0);
164	else	168	else
165	ipc_answer_0(rid, ENOENT);	169	ipc_answer_0(rid, ENOENT);
166	} else {	170	} else {
167	if (lflag & L_FILE) {	171	if (lflag & L_FILE) {
168	size_t len;	172	size_t len;
169	if (last >= first)	173	if (last >= first)
170	len = last - first + 1;	174	len = last - first + 1;
171	else	175	else
172	len = first + PLB_SIZE - last + 1;	176	len = first + PLB_SIZE - last + 1;
173		177
174	char name = (char ) malloc(len + 1);	178	char name = (char ) malloc(len + 1);
175	if (name == NULL) {	179	if (name == NULL) {
176	ipc_answer_0(rid, ENOMEM);	180	ipc_answer_0(rid, ENOMEM);
177	return;	181	return;
178	}	182	}
179		183
180	size_t i;	184	size_t i;
181	for (i = 0; i < len; i++)	185	for (i = 0; i < len; i++)
182	name[i] = PLB_GET_CHAR(first + i);	186	name[i] = PLB_GET_CHAR(first + i);
183		187
184	name[len] = 0;	188	name[len] = 0;
185		189
186	dev_handle_t handle;	190	dev_handle_t handle;
187	if (devmap_device_get_handle(name, &handle, 0) != EOK) {	191	if (devmap_device_get_handle(name, &handle, 0) != EOK) {
188	free(name);	192	free(name);
189	ipc_answer_0(rid, ENOENT);	193	ipc_answer_0(rid, ENOENT);
190	return;	194	return;
191	}	195	}
192		196
193	if (lflag & L_OPEN) {	197	if (lflag & L_OPEN) {
194	unsigned long key[] = {	198	unsigned long key[] = {
195	[DEVICES_KEY_HANDLE] = (unsigned long) handle	199	[DEVICES_KEY_HANDLE] = (unsigned long) handle
196	};	200	};
197		201
-		202	fibril_mutex_lock(&devices_mutex);
198	link_t *lnk = hash_table_find(&devices, key);	203	link_t *lnk = hash_table_find(&devices, key);
199	if (lnk == NULL) {	204	if (lnk == NULL) {
200	int phone = devmap_device_connect(handle, 0);	205	int phone = devmap_device_connect(handle, 0);
201	if (phone < 0) {	206	if (phone < 0) {
-		207	fibril_mutex_unlock(&devices_mutex);
202	free(name);	208	free(name);
203	ipc_answer_0(rid, ENOENT);	209	ipc_answer_0(rid, ENOENT);
204	return;	210	return;
205	}	211	}
206		212
207	device_t dev = (device_t ) malloc(sizeof(device_t));	213	device_t dev = (device_t ) malloc(sizeof(device_t));
208	if (dev == NULL) {	214	if (dev == NULL) {
-		215	fibril_mutex_unlock(&devices_mutex);
209	free(name);	216	free(name);
210	ipc_answer_0(rid, ENOMEM);	217	ipc_answer_0(rid, ENOMEM);
211	return;	218	return;
212	}	219	}
213		220
214	dev->handle = handle;	221	dev->handle = handle;
215	dev->phone = phone;	222	dev->phone = phone;
216	dev->refcount = 1;	223	dev->refcount = 1;
217		224
218	hash_table_insert(&devices, key, &dev->link);	225	hash_table_insert(&devices, key, &dev->link);
219	} else {	226	} else {
220	device_t *dev = hash_table_get_instance(lnk, device_t, link);	227	device_t *dev = hash_table_get_instance(lnk, device_t, link);
221	dev->refcount++;	228	dev->refcount++;
222	}	229	}
-		230	fibril_mutex_unlock(&devices_mutex);
223	}	231	}
224		232
225	free(name);	233	free(name);
226		234
227	ipc_answer_5(rid, EOK, devfs_reg.fs_handle, dev_handle, handle, 0, 1);	235	ipc_answer_5(rid, EOK, devfs_reg.fs_handle, dev_handle, handle, 0, 1);
228	} else	236	} else
229	ipc_answer_0(rid, ENOENT);	237	ipc_answer_0(rid, ENOENT);
230	}	238	}
231	}	239	}
232		240
233	void devfs_open_node(ipc_callid_t rid, ipc_call_t *request)	241	void devfs_open_node(ipc_callid_t rid, ipc_call_t *request)
234	{	242	{
235	dev_handle_t handle = IPC_GET_ARG2(*request);	243	dev_handle_t handle = IPC_GET_ARG2(*request);
236		244
237	unsigned long key[] = {	245	unsigned long key[] = {
238	[DEVICES_KEY_HANDLE] = (unsigned long) handle	246	[DEVICES_KEY_HANDLE] = (unsigned long) handle
239	};	247	};
240		248
-		249	fibril_mutex_lock(&devices_mutex);
241	link_t *lnk = hash_table_find(&devices, key);	250	link_t *lnk = hash_table_find(&devices, key);
242	if (lnk == NULL) {	251	if (lnk == NULL) {
243	int phone = devmap_device_connect(handle, 0);	252	int phone = devmap_device_connect(handle, 0);
244	if (phone < 0) {	253	if (phone < 0) {
-		254	fibril_mutex_unlock(&devices_mutex);
245	ipc_answer_0(rid, ENOENT);	255	ipc_answer_0(rid, ENOENT);
246	return;	256	return;
247	}	257	}
248		258
249	device_t dev = (device_t ) malloc(sizeof(device_t));	259	device_t dev = (device_t ) malloc(sizeof(device_t));
250	if (dev == NULL) {	260	if (dev == NULL) {
-		261	fibril_mutex_unlock(&devices_mutex);
251	ipc_answer_0(rid, ENOMEM);	262	ipc_answer_0(rid, ENOMEM);
252	return;	263	return;
253	}	264	}
254		265
255	dev->handle = handle;	266	dev->handle = handle;
256	dev->phone = phone;	267	dev->phone = phone;
257	dev->refcount = 1;	268	dev->refcount = 1;
258		269
259	hash_table_insert(&devices, key, &dev->link);	270	hash_table_insert(&devices, key, &dev->link);
260	} else {	271	} else {
261	device_t *dev = hash_table_get_instance(lnk, device_t, link);	272	device_t *dev = hash_table_get_instance(lnk, device_t, link);
262	dev->refcount++;	273	dev->refcount++;
263	}	274	}
-		275	fibril_mutex_unlock(&devices_mutex);
264		276
265	ipc_answer_3(rid, EOK, 0, 1, L_FILE);	277	ipc_answer_3(rid, EOK, 0, 1, L_FILE);
266	}	278	}
267		279
268	void devfs_device(ipc_callid_t rid, ipc_call_t *request)	280	void devfs_device(ipc_callid_t rid, ipc_call_t *request)
269	{	281	{
270	fs_index_t index = (fs_index_t) IPC_GET_ARG2(*request);	282	fs_index_t index = (fs_index_t) IPC_GET_ARG2(*request);
271		283
272	if (index != 0) {	284	if (index != 0) {
273	unsigned long key[] = {	285	unsigned long key[] = {
274	[DEVICES_KEY_HANDLE] = (unsigned long) index	286	[DEVICES_KEY_HANDLE] = (unsigned long) index
275	};	287	};
276		288
-		289	fibril_mutex_lock(&devices_mutex);
277	link_t *lnk = hash_table_find(&devices, key);	290	link_t *lnk = hash_table_find(&devices, key);
278	if (lnk == NULL) {	291	if (lnk == NULL) {
-		292	fibril_mutex_unlock(&devices_mutex);
279	ipc_answer_0(rid, ENOENT);	293	ipc_answer_0(rid, ENOENT);
280	return;	294	return;
281	}	295	}
-		296	fibril_mutex_unlock(&devices_mutex);
282		297
283	ipc_answer_1(rid, EOK, (ipcarg_t) index);	298	ipc_answer_1(rid, EOK, (ipcarg_t) index);
284	} else	299	} else
285	ipc_answer_0(rid, ENOTSUP);	300	ipc_answer_0(rid, ENOTSUP);
286	}	301	}
287		302
288	void devfs_read(ipc_callid_t rid, ipc_call_t *request)	303	void devfs_read(ipc_callid_t rid, ipc_call_t *request)
289	{	304	{
290	fs_index_t index = (fs_index_t) IPC_GET_ARG2(*request);	305	fs_index_t index = (fs_index_t) IPC_GET_ARG2(*request);
291	off_t pos = (off_t) IPC_GET_ARG3(*request);	306	off_t pos = (off_t) IPC_GET_ARG3(*request);
292		307
293	if (index != 0) {	308	if (index != 0) {
294	unsigned long key[] = {	309	unsigned long key[] = {
295	[DEVICES_KEY_HANDLE] = (unsigned long) index	310	[DEVICES_KEY_HANDLE] = (unsigned long) index
296	};	311	};
297		312
-		313	fibril_mutex_lock(&devices_mutex);
298	link_t *lnk = hash_table_find(&devices, key);	314	link_t *lnk = hash_table_find(&devices, key);
299	if (lnk == NULL) {	315	if (lnk == NULL) {
-		316	fibril_mutex_unlock(&devices_mutex);
300	ipc_answer_0(rid, ENOENT);	317	ipc_answer_0(rid, ENOENT);
301	return;	318	return;
302	}	319	}
303		320
304	device_t *dev = hash_table_get_instance(lnk, device_t, link);	321	device_t *dev = hash_table_get_instance(lnk, device_t, link);
305		322
306	ipc_callid_t callid;	323	ipc_callid_t callid;
307	if (!ipc_data_read_receive(&callid, NULL)) {	324	if (!ipc_data_read_receive(&callid, NULL)) {
-		325	fibril_mutex_unlock(&devices_mutex);
308	ipc_answer_0(callid, EINVAL);	326	ipc_answer_0(callid, EINVAL);
309	ipc_answer_0(rid, EINVAL);	327	ipc_answer_0(rid, EINVAL);
310	return;	328	return;
311	}	329	}
312		330
313	/* Make a request at the driver */	331	/* Make a request at the driver */
314	ipc_call_t answer;	332	ipc_call_t answer;
315	aid_t msg = async_send_3(dev->phone, IPC_GET_METHOD(*request),	333	aid_t msg = async_send_3(dev->phone, IPC_GET_METHOD(*request),
316	IPC_GET_ARG1(request), IPC_GET_ARG2(request),	334	IPC_GET_ARG1(request), IPC_GET_ARG2(request),
317	IPC_GET_ARG3(*request), &answer);	335	IPC_GET_ARG3(*request), &answer);
318		336
319	/* Forward the IPC_M_DATA_READ request to the driver */	337	/* Forward the IPC_M_DATA_READ request to the driver */
320	ipc_forward_fast(callid, dev->phone, 0, 0, 0, IPC_FF_ROUTE_FROM_ME);	338	ipc_forward_fast(callid, dev->phone, 0, 0, 0, IPC_FF_ROUTE_FROM_ME);
-		339	fibril_mutex_unlock(&devices_mutex);
321		340
322	/* Wait for reply from the driver. */	341	/* Wait for reply from the driver. */
323	ipcarg_t rc;	342	ipcarg_t rc;
324	async_wait_for(msg, &rc);	343	async_wait_for(msg, &rc);
325	size_t bytes = IPC_GET_ARG1(answer);	344	size_t bytes = IPC_GET_ARG1(answer);
326		345
327	/* Driver reply is the final result of the whole operation */	346	/* Driver reply is the final result of the whole operation */
328	ipc_answer_1(rid, rc, bytes);	347	ipc_answer_1(rid, rc, bytes);
329	} else {	348	} else {
330	ipc_callid_t callid;	349	ipc_callid_t callid;
331	size_t size;	350	size_t size;
332	if (!ipc_data_read_receive(&callid, &size)) {	351	if (!ipc_data_read_receive(&callid, &size)) {
333	ipc_answer_0(callid, EINVAL);	352	ipc_answer_0(callid, EINVAL);
334	ipc_answer_0(rid, EINVAL);	353	ipc_answer_0(rid, EINVAL);
335	return;	354	return;
336	}	355	}
337		356
338	size_t count = devmap_device_get_count();	357	size_t count = devmap_device_get_count();
339	dev_desc_t desc = malloc(count sizeof(dev_desc_t));	358	dev_desc_t desc = malloc(count sizeof(dev_desc_t));
340	if (desc == NULL) {	359	if (desc == NULL) {
341	ipc_answer_0(callid, ENOMEM);	360	ipc_answer_0(callid, ENOMEM);
342	ipc_answer_1(rid, ENOMEM, 0);	361	ipc_answer_1(rid, ENOMEM, 0);
343	return;	362	return;
344	}	363	}
345		364
346	size_t max = devmap_device_get_devices(count, desc);	365	size_t max = devmap_device_get_devices(count, desc);
347		366
348	if (pos < max) {	367	if (pos < max) {
349	ipc_data_read_finalize(callid, desc[pos].name, str_size(desc[pos].name) + 1);	368	ipc_data_read_finalize(callid, desc[pos].name, str_size(desc[pos].name) + 1);
350	} else {	369	} else {
351	ipc_answer_0(callid, ENOENT);	370	ipc_answer_0(callid, ENOENT);
352	ipc_answer_1(rid, ENOENT, 0);	371	ipc_answer_1(rid, ENOENT, 0);
353	return;	372	return;
354	}	373	}
355		374
356	free(desc);	375	free(desc);
357		376
358	ipc_answer_1(rid, EOK, 1);	377	ipc_answer_1(rid, EOK, 1);
359	}	378	}
360	}	379	}
361		380
362	void devfs_write(ipc_callid_t rid, ipc_call_t *request)	381	void devfs_write(ipc_callid_t rid, ipc_call_t *request)
363	{	382	{
364	fs_index_t index = (fs_index_t) IPC_GET_ARG2(*request);	383	fs_index_t index = (fs_index_t) IPC_GET_ARG2(*request);
365	off_t pos = (off_t) IPC_GET_ARG3(*request);	384	off_t pos = (off_t) IPC_GET_ARG3(*request);
366		385
367	if (index != 0) {	386	if (index != 0) {
368	unsigned long key[] = {	387	unsigned long key[] = {
369	[DEVICES_KEY_HANDLE] = (unsigned long) index	388	[DEVICES_KEY_HANDLE] = (unsigned long) index
370	};	389	};
371		390
-		391	fibril_mutex_lock(&devices_mutex);
372	link_t *lnk = hash_table_find(&devices, key);	392	link_t *lnk = hash_table_find(&devices, key);
373	if (lnk == NULL) {	393	if (lnk == NULL) {
-		394	fibril_mutex_unlock(&devices_mutex);
374	ipc_answer_0(rid, ENOENT);	395	ipc_answer_0(rid, ENOENT);
375	return;	396	return;
376	}	397	}
377		398
378	device_t *dev = hash_table_get_instance(lnk, device_t, link);	399	device_t *dev = hash_table_get_instance(lnk, device_t, link);
379		400
380	ipc_callid_t callid;	401	ipc_callid_t callid;
381	if (!ipc_data_write_receive(&callid, NULL)) {	402	if (!ipc_data_write_receive(&callid, NULL)) {
-		403	fibril_mutex_unlock(&devices_mutex);
382	ipc_answer_0(callid, EINVAL);	404	ipc_answer_0(callid, EINVAL);
383	ipc_answer_0(rid, EINVAL);	405	ipc_answer_0(rid, EINVAL);
384	return;	406	return;
385	}	407	}
386		408
387	/* Make a request at the driver */	409	/* Make a request at the driver */
388	ipc_call_t answer;	410	ipc_call_t answer;
389	aid_t msg = async_send_3(dev->phone, IPC_GET_METHOD(*request),	411	aid_t msg = async_send_3(dev->phone, IPC_GET_METHOD(*request),
390	IPC_GET_ARG1(request), IPC_GET_ARG2(request),	412	IPC_GET_ARG1(request), IPC_GET_ARG2(request),
391	IPC_GET_ARG3(*request), &answer);	413	IPC_GET_ARG3(*request), &answer);
392		414
393	/* Forward the IPC_M_DATA_WRITE request to the driver */	415	/* Forward the IPC_M_DATA_WRITE request to the driver */
394	ipc_forward_fast(callid, dev->phone, 0, 0, 0, IPC_FF_ROUTE_FROM_ME);	416	ipc_forward_fast(callid, dev->phone, 0, 0, 0, IPC_FF_ROUTE_FROM_ME);
395		417
-		418	fibril_mutex_unlock(&devices_mutex);
-		419
396	/* Wait for reply from the driver. */	420	/* Wait for reply from the driver. */
397	ipcarg_t rc;	421	ipcarg_t rc;
398	async_wait_for(msg, &rc);	422	async_wait_for(msg, &rc);
399	size_t bytes = IPC_GET_ARG1(answer);	423	size_t bytes = IPC_GET_ARG1(answer);
400		424
401	/* Driver reply is the final result of the whole operation */	425	/* Driver reply is the final result of the whole operation */
402	ipc_answer_1(rid, rc, bytes);	426	ipc_answer_1(rid, rc, bytes);
403	} else {	427	} else {
404	/* Read-only filesystem */	428	/* Read-only filesystem */
405	ipc_answer_0(rid, ENOTSUP);	429	ipc_answer_0(rid, ENOTSUP);
406	}	430	}
407	}	431	}
408		432
409	void devfs_truncate(ipc_callid_t rid, ipc_call_t *request)	433	void devfs_truncate(ipc_callid_t rid, ipc_call_t *request)
410	{	434	{
411	ipc_answer_0(rid, ENOTSUP);	435	ipc_answer_0(rid, ENOTSUP);
412	}	436	}
413		437
414	void devfs_close(ipc_callid_t rid, ipc_call_t *request)	438	void devfs_close(ipc_callid_t rid, ipc_call_t *request)
415	{	439	{
416	fs_index_t index = (fs_index_t) IPC_GET_ARG2(*request);	440	fs_index_t index = (fs_index_t) IPC_GET_ARG2(*request);
417		441
418	if (index != 0) {	442	if (index != 0) {
419	unsigned long key[] = {	443	unsigned long key[] = {
420	[DEVICES_KEY_HANDLE] = (unsigned long) index	444	[DEVICES_KEY_HANDLE] = (unsigned long) index
421	};	445	};
422		446
-		447	fibril_mutex_lock(&devices_mutex);
423	link_t *lnk = hash_table_find(&devices, key);	448	link_t *lnk = hash_table_find(&devices, key);
424	if (lnk == NULL) {	449	if (lnk == NULL) {
-		450	fibril_mutex_unlock(&devices_mutex);
425	ipc_answer_0(rid, ENOENT);	451	ipc_answer_0(rid, ENOENT);
426	return;	452	return;
427	}	453	}
428		454
429	device_t *dev = hash_table_get_instance(lnk, device_t, link);	455	device_t *dev = hash_table_get_instance(lnk, device_t, link);
430	dev->refcount--;	456	dev->refcount--;
431		457
432	if (dev->refcount == 0) {	458	if (dev->refcount == 0) {
433	ipc_hangup(dev->phone);	459	ipc_hangup(dev->phone);
434	hash_table_remove(&devices, key, DEVICES_KEYS);	460	hash_table_remove(&devices, key, DEVICES_KEYS);
435	}	461	}
436		462
-		463	fibril_mutex_unlock(&devices_mutex);
-		464
437	ipc_answer_0(rid, EOK);	465	ipc_answer_0(rid, EOK);
438	} else	466	} else
439	ipc_answer_0(rid, ENOTSUP);	467	ipc_answer_0(rid, ENOTSUP);
440	}	468	}
441		469
442	void devfs_sync(ipc_callid_t rid, ipc_call_t *request)	470	void devfs_sync(ipc_callid_t rid, ipc_call_t *request)
443	{	471	{
444	fs_index_t index = (fs_index_t) IPC_GET_ARG2(*request);	472	fs_index_t index = (fs_index_t) IPC_GET_ARG2(*request);
445		473
446	if (index != 0) {	474	if (index != 0) {
447	unsigned long key[] = {	475	unsigned long key[] = {
448	[DEVICES_KEY_HANDLE] = (unsigned long) index	476	[DEVICES_KEY_HANDLE] = (unsigned long) index
449	};	477	};
450		478
-		479	fibril_mutex_lock(&devices_mutex);
451	link_t *lnk = hash_table_find(&devices, key);	480	link_t *lnk = hash_table_find(&devices, key);
452	if (lnk == NULL) {	481	if (lnk == NULL) {
-		482	fibril_mutex_unlock(&devices_mutex);
453	ipc_answer_0(rid, ENOENT);	483	ipc_answer_0(rid, ENOENT);
454	return;	484	return;
455	}	485	}
456		486
457	device_t *dev = hash_table_get_instance(lnk, device_t, link);	487	device_t *dev = hash_table_get_instance(lnk, device_t, link);
458		488
459	/* Make a request at the driver */	489	/* Make a request at the driver */
460	ipc_call_t answer;	490	ipc_call_t answer;
461	aid_t msg = async_send_2(dev->phone, IPC_GET_METHOD(*request),	491	aid_t msg = async_send_2(dev->phone, IPC_GET_METHOD(*request),
462	IPC_GET_ARG1(request), IPC_GET_ARG2(request), &answer);	492	IPC_GET_ARG1(request), IPC_GET_ARG2(request), &answer);
463		493
-		494	fibril_mutex_unlock(&devices_mutex);
-		495
464	/* Wait for reply from the driver */	496	/* Wait for reply from the driver */
465	ipcarg_t rc;	497	ipcarg_t rc;
466	async_wait_for(msg, &rc);	498	async_wait_for(msg, &rc);
467		499
468	/* Driver reply is the final result of the whole operation */	500	/* Driver reply is the final result of the whole operation */

Subversion Repositories HelenOS

(root)/trunk/uspace/srv/fs/devfs/devfs_ops.c @ 4595 – Rev 4509 → 4561