WebSVN – HelenOS – Diff – /trunk/uspace/srv/vfs/vfs_ops.c/



#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <bool.h>
#include <futex.h>
#include <fibril_sync.h>
#include <adt/list.h>
#include <unistd.h>
#include <ctype.h>
#include <fcntl.h>
#include <assert.h>

 
/**
 * This rwlock prevents the race between a triplet-to-VFS-node resolution and a
 * concurrent VFS operation which modifies the file system namespace.
 */
FIBRIL_RWLOCK_INITIALIZE(namespace_rwlock);
 
vfs_pair_t rootfs = {
    .fs_handle = 0,
    .dev_handle = 0
};

    int phone;
    aid_t msg;
    ipc_call_t answer;
   
    /* Resolve the path to the mountpoint. */
    fibril_rwlock_write_lock(&namespace_rwlock);
    if (rootfs.fs_handle) {
        /* We already have the root FS. */
        if (str_cmp(mp, "/") == 0) {
            /* Trying to mount root FS over root FS */
            fibril_rwlock_write_unlock(&namespace_rwlock);
            ipc_answer_0(rid, EBUSY);
 
            return;
        }
       
        rc = vfs_lookup_internal(mp, L_DIRECTORY, &mp_res, NULL);
        if (rc != EOK) {
            /* The lookup failed for some reason. */
            fibril_rwlock_write_unlock(&namespace_rwlock);
            ipc_answer_0(rid, rc);
 
            return;
        }
       
        mp_node = vfs_node_get(&mp_res);
        if (!mp_node) {
            fibril_rwlock_write_unlock(&namespace_rwlock);
            ipc_answer_0(rid, ENOMEM);
 
            return;
        }
       
        /*
         * Now we hold a reference to mp_node.

                (ipcarg_t) dev_handle, &answer);
            /* send the mount options */
            rc = ipc_data_write_start(phone, (void *)opts,
                str_size(opts));
            if (rc != EOK) {
 
                vfs_release_phone(phone);
                async_wait_for(msg, NULL);
                fibril_rwlock_write_unlock(&namespace_rwlock);
                ipc_answer_0(rid, rc);
 
                return;
            }
 
            vfs_release_phone(phone);
            async_wait_for(msg, &rc);
           
            if (rc != EOK) {
                fibril_rwlock_write_unlock(&namespace_rwlock);
                ipc_answer_0(rid, rc);
 
                return;
            }
 
            rindex = (fs_index_t) IPC_GET_ARG1(answer);
            rsize = (size_t) IPC_GET_ARG2(answer);

           
            /* Add reference to the mounted root. */
            mr_node = vfs_node_get(&mr_res);
            assert(mr_node);
           
            fibril_rwlock_write_unlock(&namespace_rwlock);
            ipc_answer_0(rid, rc);
 
            return;
        } else {
            /*
             * We can't resolve this without the root filesystem
             * being mounted first.
             */
            fibril_rwlock_write_unlock(&namespace_rwlock);
            ipc_answer_0(rid, ENOENT);
 
            return;
        }
    }
   
    /*

        (ipcarg_t) dev_handle, &answer);
   
    /* send connection */
    rc = async_req_1_0(phone, IPC_M_CONNECTION_CLONE, mountee_phone);
    if (rc != EOK) {
 
        vfs_release_phone(phone);
        async_wait_for(msg, NULL);
        /* Mount failed, drop reference to mp_node. */
        if (mp_node)
            vfs_node_put(mp_node);
        ipc_answer_0(rid, rc);
        fibril_rwlock_write_unlock(&namespace_rwlock);
        return;
    }
   
    /* send the mount options */
    rc = ipc_data_write_start(phone, (void *)opts, str_size(opts));
    if (rc != EOK) {
 
        vfs_release_phone(phone);
        async_wait_for(msg, NULL);
        /* Mount failed, drop reference to mp_node. */
        if (mp_node)
            vfs_node_put(mp_node);
        fibril_rwlock_write_unlock(&namespace_rwlock);
        ipc_answer_0(rid, rc);
 
        return;
    }
 
    vfs_release_phone(phone);
    async_wait_for(msg, &rc);
   
    if (rc == EOK) {
        rindex = (fs_index_t) IPC_GET_ARG1(answer);
        rsize = (size_t) IPC_GET_ARG2(answer);
        rlnkcnt = (unsigned) IPC_GET_ARG3(answer);

        if (mp_node)
            vfs_node_put(mp_node);
    }
 
    ipc_answer_0(rid, rc);
    fibril_rwlock_write_unlock(&namespace_rwlock);
}
 
/** Process pending mount requests */
void vfs_process_pending_mount(void)
{

   
    /*
     * Make sure that we are called with exactly one of L_FILE and
     * L_DIRECTORY. Make sure that the user does not pass L_OPEN.
     */
    if (((lflag & (L_FILE | L_DIRECTORY)) == 0) ||
        ((lflag & (L_FILE | L_DIRECTORY)) == (L_FILE | L_DIRECTORY)) ||
        ((lflag & L_OPEN) != 0)) {
        ipc_answer_0(rid, EINVAL);
        return;
    }
   
    if (oflag & O_CREAT)

     * Avoid the race condition in which the file can be deleted before we
     * find/create-and-lock the VFS node corresponding to the looked-up
     * triplet.
     */
    if (lflag & L_CREATE)
        fibril_rwlock_write_lock(&namespace_rwlock);
    else
        fibril_rwlock_read_lock(&namespace_rwlock);
   
    /* The path is now populated and we can call vfs_lookup_internal(). */
    vfs_lookup_res_t lr;
    rc = vfs_lookup_internal(path, lflag | L_OPEN, &lr, NULL);
    if (rc != EOK) {
        if (lflag & L_CREATE)
            fibril_rwlock_write_unlock(&namespace_rwlock);
        else
            fibril_rwlock_read_unlock(&namespace_rwlock);
        ipc_answer_0(rid, rc);
        free(path);
        return;
    }
   
    /* Path is no longer needed. */
    free(path);
   
    vfs_node_t *node = vfs_node_get(&lr);
    if (lflag & L_CREATE)
        fibril_rwlock_write_unlock(&namespace_rwlock);
    else
        fibril_rwlock_read_unlock(&namespace_rwlock);
   
    /* Truncate the file if requested and if necessary. */
    if (oflag & O_TRUNC) {
        fibril_rwlock_write_lock(&node->contents_rwlock);
        if (node->size) {
            rc = vfs_truncate_internal(node->fs_handle,
                node->dev_handle, node->index, 0);
            if (rc) {
                fibril_rwlock_write_unlock(&node->contents_rwlock);
                vfs_node_put(node);
                ipc_answer_0(rid, rc);
                return;
            }
            node->size = 0;
        }
        fibril_rwlock_write_unlock(&node->contents_rwlock);
    }
   
    /*
     * Get ourselves a file descriptor and the corresponding vfs_file_t
     * structure.

    lr.triplet.fs_handle = IPC_GET_ARG1(*request);
    lr.triplet.dev_handle = IPC_GET_ARG2(*request);
    lr.triplet.index = IPC_GET_ARG3(*request);
    int oflag = IPC_GET_ARG4(*request);
   
    fibril_rwlock_read_lock(&namespace_rwlock);
   
    int rc = vfs_open_node_internal(&lr);
    if (rc != EOK) {
        fibril_rwlock_read_unlock(&namespace_rwlock);
        ipc_answer_0(rid, rc);
        return;
    }
   
    vfs_node_t *node = vfs_node_get(&lr);
    fibril_rwlock_read_unlock(&namespace_rwlock);
   
    /* Truncate the file if requested and if necessary. */
    if (oflag & O_TRUNC) {
        fibril_rwlock_write_lock(&node->contents_rwlock);
        if (node->size) {
            rc = vfs_truncate_internal(node->fs_handle,
                node->dev_handle, node->index, 0);
            if (rc) {
                fibril_rwlock_write_unlock(&node->contents_rwlock);
                vfs_node_put(node);
                ipc_answer_0(rid, rc);
                return;
            }
            node->size = 0;
        }
        fibril_rwlock_write_unlock(&node->contents_rwlock);
    }
   
    /*
     * Get ourselves a file descriptor and the corresponding vfs_file_t
     * structure.

    if (!file) {
        ipc_answer_0(rid, ENOENT);
        return;
    }
   
    ipc_answer_3(rid, EOK, file->node->fs_handle, file->node->dev_handle,
        file->node->index);
}
 
void vfs_device(ipc_callid_t rid, ipc_call_t *request)
{
    int fd = IPC_GET_ARG1(*request);

   
    /*
     * Lock the open file structure so that no other thread can manipulate
     * the same open file at a time.
     */
    fibril_mutex_lock(&file->lock);
    int fs_phone = vfs_grab_phone(file->node->fs_handle);
   
    /* Make a VFS_DEVICE request at the destination FS server. */
    aid_t msg;
    ipc_call_t answer;
    msg = async_send_2(fs_phone, IPC_GET_METHOD(*request),
        file->node->dev_handle, file->node->index, &answer);
   
    vfs_release_phone(fs_phone);
 
    /* Wait for reply from the FS server. */
    ipcarg_t rc;
    async_wait_for(msg, &rc);
   
 
    fibril_mutex_unlock(&file->lock);
   
    ipc_answer_1(rid, EOK, IPC_GET_ARG1(answer));
}
 
void vfs_sync(ipc_callid_t rid, ipc_call_t *request)

   
    /*
     * Lock the open file structure so that no other thread can manipulate
     * the same open file at a time.
     */
    fibril_mutex_lock(&file->lock);
    int fs_phone = vfs_grab_phone(file->node->fs_handle);
   
    /* Make a VFS_SYMC request at the destination FS server. */
    aid_t msg;
    ipc_call_t answer;
    msg = async_send_2(fs_phone, IPC_GET_METHOD(*request),
        file->node->dev_handle, file->node->index, &answer);
 
    vfs_release_phone(fs_phone);
 
    /* Wait for reply from the FS server. */
    ipcarg_t rc;
    async_wait_for(msg, &rc);
   
 
    fibril_mutex_unlock(&file->lock);
   
    ipc_answer_0(rid, rc);
}
 
void vfs_close(ipc_callid_t rid, ipc_call_t *request)

   
    /*
     * Lock the open file structure so that no other thread can manipulate
     * the same open file at a time.
     */
    fibril_mutex_lock(&file->lock);
   
    int fs_phone = vfs_grab_phone(file->node->fs_handle);
   
    /* Make a VFS_CLOSE request at the destination FS server. */
    aid_t msg;
    ipc_call_t answer;
    msg = async_send_2(fs_phone, IPC_GET_METHOD(*request),
        file->node->dev_handle, file->node->index, &answer);
 
    vfs_release_phone(fs_phone);
   
    /* Wait for reply from the FS server. */
    ipcarg_t rc;
    async_wait_for(msg, &rc);
   
 
    fibril_mutex_unlock(&file->lock);
   
    int retval = IPC_GET_ARG1(answer);
    if (retval != EOK)
        ipc_answer_0(rid, retval);
   

   
    /*
     * Lock the open file structure so that no other thread can manipulate
     * the same open file at a time.
     */
    fibril_mutex_lock(&file->lock);
 
    /*
     * Lock the file's node so that no other client can read/write to it at
     * the same time.
     */
    if (read)
        fibril_rwlock_read_lock(&file->node->contents_rwlock);
    else
        fibril_rwlock_write_lock(&file->node->contents_rwlock);
 
    if (file->node->type == VFS_NODE_DIRECTORY) {
        /*
         * Make sure that no one is modifying the namespace
         * while we are in readdir().
         */
        assert(read);
        fibril_rwlock_read_lock(&namespace_rwlock);
    }
   
    int fs_phone = vfs_grab_phone(file->node->fs_handle);  
   
    /* Make a VFS_READ/VFS_WRITE request at the destination FS server. */

     * destination FS server. The call will be routed as if sent by
     * ourselves. Note that call arguments are immutable in this case so we
     * don't have to bother.
     */
    ipc_forward_fast(callid, fs_phone, 0, 0, 0, IPC_FF_ROUTE_FROM_ME);
 
    vfs_release_phone(fs_phone);
   
    /* Wait for reply from the FS server. */
    ipcarg_t rc;
    async_wait_for(msg, &rc);
   
 
 
    size_t bytes = IPC_GET_ARG1(answer);
 
    if (file->node->type == VFS_NODE_DIRECTORY)
        fibril_rwlock_read_unlock(&namespace_rwlock);
   
    /* Unlock the VFS node. */
    if (read)
        fibril_rwlock_read_unlock(&file->node->contents_rwlock);
    else {
        /* Update the cached version of node's size. */
        if (rc == EOK)
            file->node->size = IPC_GET_ARG2(answer);
        fibril_rwlock_write_unlock(&file->node->contents_rwlock);
    }
   
    /* Update the position pointer and unlock the open file. */
    if (rc == EOK)
        file->pos += bytes;
    fibril_mutex_unlock(&file->lock);
   
    /*
     * FS server's reply is the final result of the whole operation we
     * return to the client.
     */

        ipc_answer_0(rid, ENOENT);
        return;
    }
 
    off_t newpos;
    fibril_mutex_lock(&file->lock);
    if (whence == SEEK_SET) {
        file->pos = off;
        fibril_mutex_unlock(&file->lock);
        ipc_answer_1(rid, EOK, off);
        return;
    }
    if (whence == SEEK_CUR) {
        if (file->pos + off < file->pos) {
            fibril_mutex_unlock(&file->lock);
            ipc_answer_0(rid, EOVERFLOW);
            return;
        }
        file->pos += off;
        newpos = file->pos;
        fibril_mutex_unlock(&file->lock);
        ipc_answer_1(rid, EOK, newpos);
        return;
    }
    if (whence == SEEK_END) {
        fibril_rwlock_read_lock(&file->node->contents_rwlock);
        size_t size = file->node->size;
        fibril_rwlock_read_unlock(&file->node->contents_rwlock);
        if (size + off < size) {
            fibril_mutex_unlock(&file->lock);
            ipc_answer_0(rid, EOVERFLOW);
            return;
        }
        newpos = size + off;
        fibril_mutex_unlock(&file->lock);
        ipc_answer_1(rid, EOK, newpos);
        return;
    }
    fibril_mutex_unlock(&file->lock);
    ipc_answer_0(rid, EINVAL);
}
 
int
vfs_truncate_internal(fs_handle_t fs_handle, dev_handle_t dev_handle,

    vfs_file_t *file = vfs_file_get(fd);
    if (!file) {
        ipc_answer_0(rid, ENOENT);
        return;
    }
    fibril_mutex_lock(&file->lock);
 
    fibril_rwlock_write_lock(&file->node->contents_rwlock);
    rc = vfs_truncate_internal(file->node->fs_handle,
        file->node->dev_handle, file->node->index, size);
    if (rc == EOK)
        file->node->size = size;
    fibril_rwlock_write_unlock(&file->node->contents_rwlock);
 
    fibril_mutex_unlock(&file->lock);
    ipc_answer_0(rid, (ipcarg_t)rc);
}
 
void vfs_mkdir(ipc_callid_t rid, ipc_call_t *request)
{

        free(path);
        return;
    }
    path[len] = '\0';
   
    fibril_rwlock_write_lock(&namespace_rwlock);
    int lflag = L_DIRECTORY | L_CREATE | L_EXCLUSIVE;
    rc = vfs_lookup_internal(path, lflag, NULL, NULL);
    fibril_rwlock_write_unlock(&namespace_rwlock);
    free(path);
    ipc_answer_0(rid, rc);
}
 
void vfs_unlink(ipc_callid_t rid, ipc_call_t *request)

        free(path);
        return;
    }
    path[len] = '\0';
   
    fibril_rwlock_write_lock(&namespace_rwlock);
    lflag &= L_DIRECTORY;   /* sanitize lflag */
    vfs_lookup_res_t lr;
    rc = vfs_lookup_internal(path, lflag | L_UNLINK, &lr, NULL);
    free(path);
    if (rc != EOK) {
        fibril_rwlock_write_unlock(&namespace_rwlock);
        ipc_answer_0(rid, rc);
        return;
    }
 
    /*

     */
    vfs_node_t *node = vfs_node_get(&lr);
    futex_down(&nodes_futex);
    node->lnkcnt--;
    futex_up(&nodes_futex);
    fibril_rwlock_write_unlock(&namespace_rwlock);
    vfs_node_put(node);
    ipc_answer_0(rid, EOK);
}
 
void vfs_rename(ipc_callid_t rid, ipc_call_t *request)

    }
   
    vfs_lookup_res_t old_lr;
    vfs_lookup_res_t new_lr;
    vfs_lookup_res_t new_par_lr;
    fibril_rwlock_write_lock(&namespace_rwlock);
    /* Lookup the node belonging to the old file name. */
    rc = vfs_lookup_internal(oldc, L_NONE, &old_lr, NULL);
    if (rc != EOK) {
        fibril_rwlock_write_unlock(&namespace_rwlock);
        ipc_answer_0(rid, rc);
        free(old);
        free(new);
        return;
    }
    vfs_node_t *old_node = vfs_node_get(&old_lr);
    if (!old_node) {
        fibril_rwlock_write_unlock(&namespace_rwlock);
        ipc_answer_0(rid, ENOMEM);
        free(old);
        free(new);
        return;
    }
    /* Determine the path to the parent of the node with the new name. */
    char *parentc = str_dup(newc);
    if (!parentc) {
        fibril_rwlock_write_unlock(&namespace_rwlock);
        ipc_answer_0(rid, rc);
        free(old);
        free(new);
        return;
    }

        parentc[1] = '\0';
    /* Lookup parent of the new file name. */
    rc = vfs_lookup_internal(parentc, L_NONE, &new_par_lr, NULL);
    free(parentc);  /* not needed anymore */
    if (rc != EOK) {
        fibril_rwlock_write_unlock(&namespace_rwlock);
        ipc_answer_0(rid, rc);
        free(old);
        free(new);
        return;
    }
    /* Check whether linking to the same file system instance. */
    if ((old_node->fs_handle != new_par_lr.triplet.fs_handle) ||
        (old_node->dev_handle != new_par_lr.triplet.dev_handle)) {
        fibril_rwlock_write_unlock(&namespace_rwlock);
        ipc_answer_0(rid, EXDEV);   /* different file systems */
        free(old);
        free(new);
        return;
    }

        /* simply not in our way */
        break;
    case EOK:
        new_node = vfs_node_get(&new_lr);
        if (!new_node) {
            fibril_rwlock_write_unlock(&namespace_rwlock);
            ipc_answer_0(rid, ENOMEM);
            free(old);
            free(new);
            return;
        }
        futex_down(&nodes_futex);
        new_node->lnkcnt--;
        futex_up(&nodes_futex);
        break;
    default:
        fibril_rwlock_write_unlock(&namespace_rwlock);
        ipc_answer_0(rid, ENOTEMPTY);
        free(old);
        free(new);
        return;
    }
    /* Create the new link for the new name. */
    rc = vfs_lookup_internal(newc, L_LINK, NULL, NULL, old_node->index);
    if (rc != EOK) {
        fibril_rwlock_write_unlock(&namespace_rwlock);
        if (new_node)
            vfs_node_put(new_node);
        ipc_answer_0(rid, rc);
        free(old);
        free(new);

    old_node->lnkcnt++;
    futex_up(&nodes_futex);
    /* Destroy the link for the old name. */
    rc = vfs_lookup_internal(oldc, L_UNLINK, NULL, NULL);
    if (rc != EOK) {
        fibril_rwlock_write_unlock(&namespace_rwlock);
        vfs_node_put(old_node);
        if (new_node)
            vfs_node_put(new_node);
        ipc_answer_0(rid, rc);
        free(old);

        return;
    }
    futex_down(&nodes_futex);
    old_node->lnkcnt--;
    futex_up(&nodes_futex);
    fibril_rwlock_write_unlock(&namespace_rwlock);
    vfs_node_put(old_node);
    if (new_node)
        vfs_node_put(new_node);
    free(old);
    free(new);

Rev 4509	Rev 4518
Line 42...	Line 42...
42	#include <stdio.h>	42	#include <stdio.h>
43	#include <stdlib.h>	43	#include <stdlib.h>
44	#include <string.h>	44	#include <string.h>
45	#include <bool.h>	45	#include <bool.h>
46	#include <futex.h>	46	#include <futex.h>
47	#include <rwlock.h>	47	#include <fibril_sync.h>
48	#include <adt/list.h>	48	#include <adt/list.h>
49	#include <unistd.h>	49	#include <unistd.h>
50	#include <ctype.h>	50	#include <ctype.h>
51	#include <fcntl.h>	51	#include <fcntl.h>
52	#include <assert.h>	52	#include <assert.h>
Line 70...	Line 70...
70		70
71	/**	71	/**
72	* This rwlock prevents the race between a triplet-to-VFS-node resolution and a	72	* This rwlock prevents the race between a triplet-to-VFS-node resolution and a
73	* concurrent VFS operation which modifies the file system namespace.	73	* concurrent VFS operation which modifies the file system namespace.
74	*/	74	*/
75	RWLOCK_INITIALIZE(namespace_rwlock);	75	FIBRIL_RWLOCK_INITIALIZE(namespace_rwlock);
76		76
77	vfs_pair_t rootfs = {	77	vfs_pair_t rootfs = {
78	.fs_handle = 0,	78	.fs_handle = 0,
79	.dev_handle = 0	79	.dev_handle = 0
80	};	80	};
Line 93...	Line 93...
93	int phone;	93	int phone;
94	aid_t msg;	94	aid_t msg;
95	ipc_call_t answer;	95	ipc_call_t answer;
96		96
97	/* Resolve the path to the mountpoint. */	97	/* Resolve the path to the mountpoint. */
98	rwlock_write_lock(&namespace_rwlock);	98	fibril_rwlock_write_lock(&namespace_rwlock);
99	if (rootfs.fs_handle) {	99	if (rootfs.fs_handle) {
100	/* We already have the root FS. */	100	/* We already have the root FS. */
101	if (str_cmp(mp, "/") == 0) {	101	if (str_cmp(mp, "/") == 0) {
102	/* Trying to mount root FS over root FS */	102	/* Trying to mount root FS over root FS */
-		103	fibril_rwlock_write_unlock(&namespace_rwlock);
103	ipc_answer_0(rid, EBUSY);	104	ipc_answer_0(rid, EBUSY);
104	rwlock_write_unlock(&namespace_rwlock);	-
105	return;	105	return;
106	}	106	}
107		107
108	rc = vfs_lookup_internal(mp, L_DIRECTORY, &mp_res, NULL);	108	rc = vfs_lookup_internal(mp, L_DIRECTORY, &mp_res, NULL);
109	if (rc != EOK) {	109	if (rc != EOK) {
110	/* The lookup failed for some reason. */	110	/* The lookup failed for some reason. */
-		111	fibril_rwlock_write_unlock(&namespace_rwlock);
111	ipc_answer_0(rid, rc);	112	ipc_answer_0(rid, rc);
112	rwlock_write_unlock(&namespace_rwlock);	-
113	return;	113	return;
114	}	114	}
115		115
116	mp_node = vfs_node_get(&mp_res);	116	mp_node = vfs_node_get(&mp_res);
117	if (!mp_node) {	117	if (!mp_node) {
-		118	fibril_rwlock_write_unlock(&namespace_rwlock);
118	ipc_answer_0(rid, ENOMEM);	119	ipc_answer_0(rid, ENOMEM);
119	rwlock_write_unlock(&namespace_rwlock);	-
120	return;	120	return;
121	}	121	}
122		122
123	/*	123	/*
124	* Now we hold a reference to mp_node.	124	* Now we hold a reference to mp_node.
Line 139...	Line 139...
139	(ipcarg_t) dev_handle, &answer);	139	(ipcarg_t) dev_handle, &answer);
140	/* send the mount options */	140	/* send the mount options */
141	rc = ipc_data_write_start(phone, (void *)opts,	141	rc = ipc_data_write_start(phone, (void *)opts,
142	str_size(opts));	142	str_size(opts));
143	if (rc != EOK) {	143	if (rc != EOK) {
144	async_wait_for(msg, NULL);	-
145	vfs_release_phone(phone);	144	vfs_release_phone(phone);
-		145	async_wait_for(msg, NULL);
-		146	fibril_rwlock_write_unlock(&namespace_rwlock);
146	ipc_answer_0(rid, rc);	147	ipc_answer_0(rid, rc);
147	rwlock_write_unlock(&namespace_rwlock);	-
148	return;	148	return;
149	}	149	}
150	async_wait_for(msg, &rc);	-
151	vfs_release_phone(phone);	150	vfs_release_phone(phone);
-		151	async_wait_for(msg, &rc);
152		152
153	if (rc != EOK) {	153	if (rc != EOK) {
-		154	fibril_rwlock_write_unlock(&namespace_rwlock);
154	ipc_answer_0(rid, rc);	155	ipc_answer_0(rid, rc);
155	rwlock_write_unlock(&namespace_rwlock);	-
156	return;	156	return;
157	}	157	}
158		158
159	rindex = (fs_index_t) IPC_GET_ARG1(answer);	159	rindex = (fs_index_t) IPC_GET_ARG1(answer);
160	rsize = (size_t) IPC_GET_ARG2(answer);	160	rsize = (size_t) IPC_GET_ARG2(answer);
Line 172...	Line 172...
172		172
173	/* Add reference to the mounted root. */	173	/* Add reference to the mounted root. */
174	mr_node = vfs_node_get(&mr_res);	174	mr_node = vfs_node_get(&mr_res);
175	assert(mr_node);	175	assert(mr_node);
176		176
-		177	fibril_rwlock_write_unlock(&namespace_rwlock);
177	ipc_answer_0(rid, rc);	178	ipc_answer_0(rid, rc);
178	rwlock_write_unlock(&namespace_rwlock);	-
179	return;	179	return;
180	} else {	180	} else {
181	/*	181	/*
182	* We can't resolve this without the root filesystem	182	* We can't resolve this without the root filesystem
183	* being mounted first.	183	* being mounted first.
184	*/	184	*/
-		185	fibril_rwlock_write_unlock(&namespace_rwlock);
185	ipc_answer_0(rid, ENOENT);	186	ipc_answer_0(rid, ENOENT);
186	rwlock_write_unlock(&namespace_rwlock);	-
187	return;	187	return;
188	}	188	}
189	}	189	}
190		190
191	/*	191	/*
Line 205...	Line 205...
205	(ipcarg_t) dev_handle, &answer);	205	(ipcarg_t) dev_handle, &answer);
206		206
207	/* send connection */	207	/* send connection */
208	rc = async_req_1_0(phone, IPC_M_CONNECTION_CLONE, mountee_phone);	208	rc = async_req_1_0(phone, IPC_M_CONNECTION_CLONE, mountee_phone);
209	if (rc != EOK) {	209	if (rc != EOK) {
210	async_wait_for(msg, NULL);	-
211	vfs_release_phone(phone);	210	vfs_release_phone(phone);
-		211	async_wait_for(msg, NULL);
212	/* Mount failed, drop reference to mp_node. */	212	/* Mount failed, drop reference to mp_node. */
213	if (mp_node)	213	if (mp_node)
214	vfs_node_put(mp_node);	214	vfs_node_put(mp_node);
215	ipc_answer_0(rid, rc);	215	ipc_answer_0(rid, rc);
216	rwlock_write_unlock(&namespace_rwlock);	216	fibril_rwlock_write_unlock(&namespace_rwlock);
217	return;	217	return;
218	}	218	}
219		219
220	/* send the mount options */	220	/* send the mount options */
221	rc = ipc_data_write_start(phone, (void *)opts, str_size(opts));	221	rc = ipc_data_write_start(phone, (void *)opts, str_size(opts));
222	if (rc != EOK) {	222	if (rc != EOK) {
223	async_wait_for(msg, NULL);	-
224	vfs_release_phone(phone);	223	vfs_release_phone(phone);
-		224	async_wait_for(msg, NULL);
225	/* Mount failed, drop reference to mp_node. */	225	/* Mount failed, drop reference to mp_node. */
226	if (mp_node)	226	if (mp_node)
227	vfs_node_put(mp_node);	227	vfs_node_put(mp_node);
-		228	fibril_rwlock_write_unlock(&namespace_rwlock);
228	ipc_answer_0(rid, rc);	229	ipc_answer_0(rid, rc);
229	rwlock_write_unlock(&namespace_rwlock);	-
230	return;	230	return;
231	}	231	}
232	async_wait_for(msg, &rc);	-
233	vfs_release_phone(phone);	232	vfs_release_phone(phone);
-		233	async_wait_for(msg, &rc);
234		234
235	if (rc == EOK) {	235	if (rc == EOK) {
236	rindex = (fs_index_t) IPC_GET_ARG1(answer);	236	rindex = (fs_index_t) IPC_GET_ARG1(answer);
237	rsize = (size_t) IPC_GET_ARG2(answer);	237	rsize = (size_t) IPC_GET_ARG2(answer);
238	rlnkcnt = (unsigned) IPC_GET_ARG3(answer);	238	rlnkcnt = (unsigned) IPC_GET_ARG3(answer);
Line 252...	Line 252...
252	if (mp_node)	252	if (mp_node)
253	vfs_node_put(mp_node);	253	vfs_node_put(mp_node);
254	}	254	}
255		255
256	ipc_answer_0(rid, rc);	256	ipc_answer_0(rid, rc);
257	rwlock_write_unlock(&namespace_rwlock);	257	fibril_rwlock_write_unlock(&namespace_rwlock);
258	}	258	}
259		259
260	/** Process pending mount requests */	260	/** Process pending mount requests */
261	void vfs_process_pending_mount(void)	261	void vfs_process_pending_mount(void)
262	{	262	{
Line 506...	Line 506...
506		506
507	/*	507	/*
508	* Make sure that we are called with exactly one of L_FILE and	508	* Make sure that we are called with exactly one of L_FILE and
509	* L_DIRECTORY. Make sure that the user does not pass L_OPEN.	509	* L_DIRECTORY. Make sure that the user does not pass L_OPEN.
510	*/	510	*/
511	if (((lflag & (L_FILE \| L_DIRECTORY)) == 0)	511	if (((lflag & (L_FILE \| L_DIRECTORY)) == 0) \|\|
512	\|\| ((lflag & (L_FILE \| L_DIRECTORY)) == (L_FILE \| L_DIRECTORY))	512	((lflag & (L_FILE \| L_DIRECTORY)) == (L_FILE \| L_DIRECTORY)) \|\|
513	\|\| ((lflag & L_OPEN) != 0)) {	513	((lflag & L_OPEN) != 0)) {
514	ipc_answer_0(rid, EINVAL);	514	ipc_answer_0(rid, EINVAL);
515	return;	515	return;
516	}	516	}
517		517
518	if (oflag & O_CREAT)	518	if (oflag & O_CREAT)
Line 546...	Line 546...
546	* Avoid the race condition in which the file can be deleted before we	546	* Avoid the race condition in which the file can be deleted before we
547	* find/create-and-lock the VFS node corresponding to the looked-up	547	* find/create-and-lock the VFS node corresponding to the looked-up
548	* triplet.	548	* triplet.
549	*/	549	*/
550	if (lflag & L_CREATE)	550	if (lflag & L_CREATE)
551	rwlock_write_lock(&namespace_rwlock);	551	fibril_rwlock_write_lock(&namespace_rwlock);
552	else	552	else
553	rwlock_read_lock(&namespace_rwlock);	553	fibril_rwlock_read_lock(&namespace_rwlock);
554		554
555	/* The path is now populated and we can call vfs_lookup_internal(). */	555	/* The path is now populated and we can call vfs_lookup_internal(). */
556	vfs_lookup_res_t lr;	556	vfs_lookup_res_t lr;
557	rc = vfs_lookup_internal(path, lflag \| L_OPEN, &lr, NULL);	557	rc = vfs_lookup_internal(path, lflag \| L_OPEN, &lr, NULL);
558	if (rc != EOK) {	558	if (rc != EOK) {
559	if (lflag & L_CREATE)	559	if (lflag & L_CREATE)
560	rwlock_write_unlock(&namespace_rwlock);	560	fibril_rwlock_write_unlock(&namespace_rwlock);
561	else	561	else
562	rwlock_read_unlock(&namespace_rwlock);	562	fibril_rwlock_read_unlock(&namespace_rwlock);
563	ipc_answer_0(rid, rc);	563	ipc_answer_0(rid, rc);
564	free(path);	564	free(path);
565	return;	565	return;
566	}	566	}
567		567
568	/* Path is no longer needed. */	568	/* Path is no longer needed. */
569	free(path);	569	free(path);
570		570
571	vfs_node_t *node = vfs_node_get(&lr);	571	vfs_node_t *node = vfs_node_get(&lr);
572	if (lflag & L_CREATE)	572	if (lflag & L_CREATE)
573	rwlock_write_unlock(&namespace_rwlock);	573	fibril_rwlock_write_unlock(&namespace_rwlock);
574	else	574	else
575	rwlock_read_unlock(&namespace_rwlock);	575	fibril_rwlock_read_unlock(&namespace_rwlock);
576		576
577	/* Truncate the file if requested and if necessary. */	577	/* Truncate the file if requested and if necessary. */
578	if (oflag & O_TRUNC) {	578	if (oflag & O_TRUNC) {
579	rwlock_write_lock(&node->contents_rwlock);	579	fibril_rwlock_write_lock(&node->contents_rwlock);
580	if (node->size) {	580	if (node->size) {
581	rc = vfs_truncate_internal(node->fs_handle,	581	rc = vfs_truncate_internal(node->fs_handle,
582	node->dev_handle, node->index, 0);	582	node->dev_handle, node->index, 0);
583	if (rc) {	583	if (rc) {
584	rwlock_write_unlock(&node->contents_rwlock);	584	fibril_rwlock_write_unlock(&node->contents_rwlock);
585	vfs_node_put(node);	585	vfs_node_put(node);
586	ipc_answer_0(rid, rc);	586	ipc_answer_0(rid, rc);
587	return;	587	return;
588	}	588	}
589	node->size = 0;	589	node->size = 0;
590	}	590	}
591	rwlock_write_unlock(&node->contents_rwlock);	591	fibril_rwlock_write_unlock(&node->contents_rwlock);
592	}	592	}
593		593
594	/*	594	/*
595	* Get ourselves a file descriptor and the corresponding vfs_file_t	595	* Get ourselves a file descriptor and the corresponding vfs_file_t
596	* structure.	596	* structure.
Line 637...	Line 637...
637	lr.triplet.fs_handle = IPC_GET_ARG1(*request);	637	lr.triplet.fs_handle = IPC_GET_ARG1(*request);
638	lr.triplet.dev_handle = IPC_GET_ARG2(*request);	638	lr.triplet.dev_handle = IPC_GET_ARG2(*request);
639	lr.triplet.index = IPC_GET_ARG3(*request);	639	lr.triplet.index = IPC_GET_ARG3(*request);
640	int oflag = IPC_GET_ARG4(*request);	640	int oflag = IPC_GET_ARG4(*request);
641		641
642	rwlock_read_lock(&namespace_rwlock);	642	fibril_rwlock_read_lock(&namespace_rwlock);
643		643
644	int rc = vfs_open_node_internal(&lr);	644	int rc = vfs_open_node_internal(&lr);
645	if (rc != EOK) {	645	if (rc != EOK) {
646	rwlock_read_unlock(&namespace_rwlock);	646	fibril_rwlock_read_unlock(&namespace_rwlock);
647	ipc_answer_0(rid, rc);	647	ipc_answer_0(rid, rc);
648	return;	648	return;
649	}	649	}
650		650
651	vfs_node_t *node = vfs_node_get(&lr);	651	vfs_node_t *node = vfs_node_get(&lr);
652	rwlock_read_unlock(&namespace_rwlock);	652	fibril_rwlock_read_unlock(&namespace_rwlock);
653		653
654	/* Truncate the file if requested and if necessary. */	654	/* Truncate the file if requested and if necessary. */
655	if (oflag & O_TRUNC) {	655	if (oflag & O_TRUNC) {
656	rwlock_write_lock(&node->contents_rwlock);	656	fibril_rwlock_write_lock(&node->contents_rwlock);
657	if (node->size) {	657	if (node->size) {
658	rc = vfs_truncate_internal(node->fs_handle,	658	rc = vfs_truncate_internal(node->fs_handle,
659	node->dev_handle, node->index, 0);	659	node->dev_handle, node->index, 0);
660	if (rc) {	660	if (rc) {
661	rwlock_write_unlock(&node->contents_rwlock);	661	fibril_rwlock_write_unlock(&node->contents_rwlock);
662	vfs_node_put(node);	662	vfs_node_put(node);
663	ipc_answer_0(rid, rc);	663	ipc_answer_0(rid, rc);
664	return;	664	return;
665	}	665	}
666	node->size = 0;	666	node->size = 0;
667	}	667	}
668	rwlock_write_unlock(&node->contents_rwlock);	668	fibril_rwlock_write_unlock(&node->contents_rwlock);
669	}	669	}
670		670
671	/*	671	/*
672	* Get ourselves a file descriptor and the corresponding vfs_file_t	672	* Get ourselves a file descriptor and the corresponding vfs_file_t
673	* structure.	673	* structure.
Line 706...	Line 706...
706	if (!file) {	706	if (!file) {
707	ipc_answer_0(rid, ENOENT);	707	ipc_answer_0(rid, ENOENT);
708	return;	708	return;
709	}	709	}
710		710
711	ipc_answer_3(rid, EOK, file->node->fs_handle,	711	ipc_answer_3(rid, EOK, file->node->fs_handle, file->node->dev_handle,
712	file->node->dev_handle, file->node->index);	712	file->node->index);
713	}	713	}
714		714
715	void vfs_device(ipc_callid_t rid, ipc_call_t *request)	715	void vfs_device(ipc_callid_t rid, ipc_call_t *request)
716	{	716	{
717	int fd = IPC_GET_ARG1(*request);	717	int fd = IPC_GET_ARG1(*request);
Line 725...	Line 725...
725		725
726	/*	726	/*
727	* Lock the open file structure so that no other thread can manipulate	727	* Lock the open file structure so that no other thread can manipulate
728	* the same open file at a time.	728	* the same open file at a time.
729	*/	729	*/
730	futex_down(&file->lock);	730	fibril_mutex_lock(&file->lock);
731	int fs_phone = vfs_grab_phone(file->node->fs_handle);	731	int fs_phone = vfs_grab_phone(file->node->fs_handle);
732		732
733	/* Make a VFS_DEVICE request at the destination FS server. */	733	/* Make a VFS_DEVICE request at the destination FS server. */
734	aid_t msg;	734	aid_t msg;
735	ipc_call_t answer;	735	ipc_call_t answer;
736	msg = async_send_2(fs_phone, IPC_GET_METHOD(*request),	736	msg = async_send_2(fs_phone, IPC_GET_METHOD(*request),
737	file->node->dev_handle, file->node->index, &answer);	737	file->node->dev_handle, file->node->index, &answer);
738		738
-		739	vfs_release_phone(fs_phone);
-		740
739	/* Wait for reply from the FS server. */	741	/* Wait for reply from the FS server. */
740	ipcarg_t rc;	742	ipcarg_t rc;
741	async_wait_for(msg, &rc);	743	async_wait_for(msg, &rc);
742		744
743	vfs_release_phone(fs_phone);	-
744	futex_up(&file->lock);	745	fibril_mutex_unlock(&file->lock);
745		746
746	ipc_answer_1(rid, EOK, IPC_GET_ARG1(answer));	747	ipc_answer_1(rid, EOK, IPC_GET_ARG1(answer));
747	}	748	}
748		749
749	void vfs_sync(ipc_callid_t rid, ipc_call_t *request)	750	void vfs_sync(ipc_callid_t rid, ipc_call_t *request)
Line 759...	Line 760...
759		760
760	/*	761	/*
761	* Lock the open file structure so that no other thread can manipulate	762	* Lock the open file structure so that no other thread can manipulate
762	* the same open file at a time.	763	* the same open file at a time.
763	*/	764	*/
764	futex_down(&file->lock);	765	fibril_mutex_lock(&file->lock);
765	int fs_phone = vfs_grab_phone(file->node->fs_handle);	766	int fs_phone = vfs_grab_phone(file->node->fs_handle);
766		767
767	/* Make a VFS_SYMC request at the destination FS server. */	768	/* Make a VFS_SYMC request at the destination FS server. */
768	aid_t msg;	769	aid_t msg;
769	ipc_call_t answer;	770	ipc_call_t answer;
770	msg = async_send_2(fs_phone, IPC_GET_METHOD(*request),	771	msg = async_send_2(fs_phone, IPC_GET_METHOD(*request),
771	file->node->dev_handle, file->node->index, &answer);	772	file->node->dev_handle, file->node->index, &answer);
-		773
-		774	vfs_release_phone(fs_phone);
772		775
773	/* Wait for reply from the FS server. */	776	/* Wait for reply from the FS server. */
774	ipcarg_t rc;	777	ipcarg_t rc;
775	async_wait_for(msg, &rc);	778	async_wait_for(msg, &rc);
776		779
777	vfs_release_phone(fs_phone);	-
778	futex_up(&file->lock);	780	fibril_mutex_unlock(&file->lock);
779		781
780	ipc_answer_0(rid, rc);	782	ipc_answer_0(rid, rc);
781	}	783	}
782		784
783	void vfs_close(ipc_callid_t rid, ipc_call_t *request)	785	void vfs_close(ipc_callid_t rid, ipc_call_t *request)
Line 793...	Line 795...
793		795
794	/*	796	/*
795	* Lock the open file structure so that no other thread can manipulate	797	* Lock the open file structure so that no other thread can manipulate
796	* the same open file at a time.	798	* the same open file at a time.
797	*/	799	*/
798	futex_down(&file->lock);	800	fibril_mutex_lock(&file->lock);
799		801
800	int fs_phone = vfs_grab_phone(file->node->fs_handle);	802	int fs_phone = vfs_grab_phone(file->node->fs_handle);
801		803
802	/* Make a VFS_CLOSE request at the destination FS server. */	804	/* Make a VFS_CLOSE request at the destination FS server. */
803	aid_t msg;	805	aid_t msg;
804	ipc_call_t answer;	806	ipc_call_t answer;
805	msg = async_send_2(fs_phone, IPC_GET_METHOD(*request),	807	msg = async_send_2(fs_phone, IPC_GET_METHOD(*request),
806	file->node->dev_handle, file->node->index, &answer);	808	file->node->dev_handle, file->node->index, &answer);
-		809
-		810	vfs_release_phone(fs_phone);
807		811
808	/* Wait for reply from the FS server. */	812	/* Wait for reply from the FS server. */
809	ipcarg_t rc;	813	ipcarg_t rc;
810	async_wait_for(msg, &rc);	814	async_wait_for(msg, &rc);
811		815
812	vfs_release_phone(fs_phone);	-
813	futex_up(&file->lock);	816	fibril_mutex_unlock(&file->lock);
814		817
815	int retval = IPC_GET_ARG1(answer);	818	int retval = IPC_GET_ARG1(answer);
816	if (retval != EOK)	819	if (retval != EOK)
817	ipc_answer_0(rid, retval);	820	ipc_answer_0(rid, retval);
818		821
Line 860...	Line 863...
860		863
861	/*	864	/*
862	* Lock the open file structure so that no other thread can manipulate	865	* Lock the open file structure so that no other thread can manipulate
863	* the same open file at a time.	866	* the same open file at a time.
864	*/	867	*/
865	futex_down(&file->lock);	868	fibril_mutex_lock(&file->lock);
866		869
867	/*	870	/*
868	* Lock the file's node so that no other client can read/write to it at	871	* Lock the file's node so that no other client can read/write to it at
869	* the same time.	872	* the same time.
870	*/	873	*/
871	if (read)	874	if (read)
872	rwlock_read_lock(&file->node->contents_rwlock);	875	fibril_rwlock_read_lock(&file->node->contents_rwlock);
873	else	876	else
874	rwlock_write_lock(&file->node->contents_rwlock);	877	fibril_rwlock_write_lock(&file->node->contents_rwlock);
875		878
876	if (file->node->type == VFS_NODE_DIRECTORY) {	879	if (file->node->type == VFS_NODE_DIRECTORY) {
877	/*	880	/*
878	* Make sure that no one is modifying the namespace	881	* Make sure that no one is modifying the namespace
879	* while we are in readdir().	882	* while we are in readdir().
880	*/	883	*/
881	assert(read);	884	assert(read);
882	rwlock_read_lock(&namespace_rwlock);	885	fibril_rwlock_read_lock(&namespace_rwlock);
883	}	886	}
884		887
885	int fs_phone = vfs_grab_phone(file->node->fs_handle);	888	int fs_phone = vfs_grab_phone(file->node->fs_handle);
886		889
887	/* Make a VFS_READ/VFS_WRITE request at the destination FS server. */	890	/* Make a VFS_READ/VFS_WRITE request at the destination FS server. */
Line 897...	Line 900...
897	* destination FS server. The call will be routed as if sent by	900	* destination FS server. The call will be routed as if sent by
898	* ourselves. Note that call arguments are immutable in this case so we	901	* ourselves. Note that call arguments are immutable in this case so we
899	* don't have to bother.	902	* don't have to bother.
900	*/	903	*/
901	ipc_forward_fast(callid, fs_phone, 0, 0, 0, IPC_FF_ROUTE_FROM_ME);	904	ipc_forward_fast(callid, fs_phone, 0, 0, 0, IPC_FF_ROUTE_FROM_ME);
-		905
-		906	vfs_release_phone(fs_phone);
902		907
903	/* Wait for reply from the FS server. */	908	/* Wait for reply from the FS server. */
904	ipcarg_t rc;	909	ipcarg_t rc;
905	async_wait_for(msg, &rc);	910	async_wait_for(msg, &rc);
906		911
907	vfs_release_phone(fs_phone);	-
908		-
909	size_t bytes = IPC_GET_ARG1(answer);	912	size_t bytes = IPC_GET_ARG1(answer);
910		913
911	if (file->node->type == VFS_NODE_DIRECTORY)	914	if (file->node->type == VFS_NODE_DIRECTORY)
912	rwlock_read_unlock(&namespace_rwlock);	915	fibril_rwlock_read_unlock(&namespace_rwlock);
913		916
914	/* Unlock the VFS node. */	917	/* Unlock the VFS node. */
915	if (read)	918	if (read)
916	rwlock_read_unlock(&file->node->contents_rwlock);	919	fibril_rwlock_read_unlock(&file->node->contents_rwlock);
917	else {	920	else {
918	/* Update the cached version of node's size. */	921	/* Update the cached version of node's size. */
919	if (rc == EOK)	922	if (rc == EOK)
920	file->node->size = IPC_GET_ARG2(answer);	923	file->node->size = IPC_GET_ARG2(answer);
921	rwlock_write_unlock(&file->node->contents_rwlock);	924	fibril_rwlock_write_unlock(&file->node->contents_rwlock);
922	}	925	}
923		926
924	/* Update the position pointer and unlock the open file. */	927	/* Update the position pointer and unlock the open file. */
925	if (rc == EOK)	928	if (rc == EOK)
926	file->pos += bytes;	929	file->pos += bytes;
927	futex_up(&file->lock);	930	fibril_mutex_unlock(&file->lock);
928		931
929	/*	932	/*
930	* FS server's reply is the final result of the whole operation we	933	* FS server's reply is the final result of the whole operation we
931	* return to the client.	934	* return to the client.
932	*/	935	*/
Line 956...	Line 959...
956	ipc_answer_0(rid, ENOENT);	959	ipc_answer_0(rid, ENOENT);
957	return;	960	return;
958	}	961	}
959		962
960	off_t newpos;	963	off_t newpos;
961	futex_down(&file->lock);	964	fibril_mutex_lock(&file->lock);
962	if (whence == SEEK_SET) {	965	if (whence == SEEK_SET) {
963	file->pos = off;	966	file->pos = off;
964	futex_up(&file->lock);	967	fibril_mutex_unlock(&file->lock);
965	ipc_answer_1(rid, EOK, off);	968	ipc_answer_1(rid, EOK, off);
966	return;	969	return;
967	}	970	}
968	if (whence == SEEK_CUR) {	971	if (whence == SEEK_CUR) {
969	if (file->pos + off < file->pos) {	972	if (file->pos + off < file->pos) {
970	futex_up(&file->lock);	973	fibril_mutex_unlock(&file->lock);
971	ipc_answer_0(rid, EOVERFLOW);	974	ipc_answer_0(rid, EOVERFLOW);
972	return;	975	return;
973	}	976	}
974	file->pos += off;	977	file->pos += off;
975	newpos = file->pos;	978	newpos = file->pos;
976	futex_up(&file->lock);	979	fibril_mutex_unlock(&file->lock);
977	ipc_answer_1(rid, EOK, newpos);	980	ipc_answer_1(rid, EOK, newpos);
978	return;	981	return;
979	}	982	}
980	if (whence == SEEK_END) {	983	if (whence == SEEK_END) {
981	rwlock_read_lock(&file->node->contents_rwlock);	984	fibril_rwlock_read_lock(&file->node->contents_rwlock);
982	size_t size = file->node->size;	985	size_t size = file->node->size;
983	rwlock_read_unlock(&file->node->contents_rwlock);	986	fibril_rwlock_read_unlock(&file->node->contents_rwlock);
984	if (size + off < size) {	987	if (size + off < size) {
985	futex_up(&file->lock);	988	fibril_mutex_unlock(&file->lock);
986	ipc_answer_0(rid, EOVERFLOW);	989	ipc_answer_0(rid, EOVERFLOW);
987	return;	990	return;
988	}	991	}
989	newpos = size + off;	992	newpos = size + off;
990	futex_up(&file->lock);	993	fibril_mutex_unlock(&file->lock);
991	ipc_answer_1(rid, EOK, newpos);	994	ipc_answer_1(rid, EOK, newpos);
992	return;	995	return;
993	}	996	}
994	futex_up(&file->lock);	997	fibril_mutex_unlock(&file->lock);
995	ipc_answer_0(rid, EINVAL);	998	ipc_answer_0(rid, EINVAL);
996	}	999	}
997		1000
998	int	1001	int
999	vfs_truncate_internal(fs_handle_t fs_handle, dev_handle_t dev_handle,	1002	vfs_truncate_internal(fs_handle_t fs_handle, dev_handle_t dev_handle,
Line 1018...	Line 1021...
1018	vfs_file_t *file = vfs_file_get(fd);	1021	vfs_file_t *file = vfs_file_get(fd);
1019	if (!file) {	1022	if (!file) {
1020	ipc_answer_0(rid, ENOENT);	1023	ipc_answer_0(rid, ENOENT);
1021	return;	1024	return;
1022	}	1025	}
1023	futex_down(&file->lock);	1026	fibril_mutex_lock(&file->lock);
1024		1027
1025	rwlock_write_lock(&file->node->contents_rwlock);	1028	fibril_rwlock_write_lock(&file->node->contents_rwlock);
1026	rc = vfs_truncate_internal(file->node->fs_handle,	1029	rc = vfs_truncate_internal(file->node->fs_handle,
1027	file->node->dev_handle, file->node->index, size);	1030	file->node->dev_handle, file->node->index, size);
1028	if (rc == EOK)	1031	if (rc == EOK)
1029	file->node->size = size;	1032	file->node->size = size;
1030	rwlock_write_unlock(&file->node->contents_rwlock);	1033	fibril_rwlock_write_unlock(&file->node->contents_rwlock);
1031		1034
1032	futex_up(&file->lock);	1035	fibril_mutex_unlock(&file->lock);
1033	ipc_answer_0(rid, (ipcarg_t)rc);	1036	ipc_answer_0(rid, (ipcarg_t)rc);
1034	}	1037	}
1035		1038
1036	void vfs_mkdir(ipc_callid_t rid, ipc_call_t *request)	1039	void vfs_mkdir(ipc_callid_t rid, ipc_call_t *request)
1037	{	1040	{
Line 1057...	Line 1060...
1057	free(path);	1060	free(path);
1058	return;	1061	return;

Subversion Repositories HelenOS

(root)/trunk/uspace/srv/vfs/vfs_ops.c/ – Rev 4509 → 4518