diff options
Diffstat (limited to 'eth-multiplexer/netfs_impl.c')
| -rw-r--r-- | eth-multiplexer/netfs_impl.c | 508 |
1 files changed, 0 insertions, 508 deletions
diff --git a/eth-multiplexer/netfs_impl.c b/eth-multiplexer/netfs_impl.c deleted file mode 100644 index 40015a83..00000000 --- a/eth-multiplexer/netfs_impl.c +++ /dev/null @@ -1,508 +0,0 @@ -/* - Copyright (C) 2008, 2009 Free Software Foundation, Inc. - Written by Zheng Da. - - This file is part of the GNU Hurd. - - The GNU Hurd is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2, or (at your option) - any later version. - - The GNU Hurd is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with the GNU Hurd; see the file COPYING. If not, write to - the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ - -#include <fcntl.h> -#include <dirent.h> -#include <stddef.h> -#include <sys/mman.h> -#include <stdlib.h> -#include <ctype.h> - -#include <hurd/netfs.h> - -#include "netfs_impl.h" -#include "vdev.h" -#include "util.h" - -#define DIRENTS_CHUNK_SIZE (8*1024) -/* Returned directory entries are aligned to blocks this many bytes long. - * Must be a power of two. */ -#define DIRENT_ALIGN 4 -#define DIRENT_NAME_OFFS offsetof (struct dirent, d_name) - -/* Length is structure before the name + the name + '\0', all - * padded to a four-byte alignment. */ -#define DIRENT_LEN(name_len) \ - ((DIRENT_NAME_OFFS + (name_len) + 1 + (DIRENT_ALIGN - 1)) \ - & ~(DIRENT_ALIGN - 1)) - -extern struct stat underlying_node_stat; - -int -is_num (char *str) -{ - for (; *str; str++) - { - if (!isdigit (*str)) - return 0; - } - return 1; -} - -/* Make a new virtual node. Always consumes the ports. */ -error_t -new_node (struct lnode *ln, struct node **np) -{ - error_t err = 0; - struct netnode *nn = calloc (1, sizeof *nn); - struct node *node; - - if (nn == 0) - return ENOMEM; - node = netfs_make_node (nn); - if (node == 0) - { - free (nn); - *np = NULL; - return ENOMEM; - } - if (ln) - ln->n = node; - nn->ln = ln; - *np = node; - return err; -} - -struct node * -lookup (char *name) -{ - struct lnode *ln = (struct lnode *) lookup_dev_by_name (name); - - char *copied_name = malloc (strlen (name) + 1); - strcpy (copied_name, name); - if (ln) - { - new_node (ln, &ln->n); - ln->n->nn->name = copied_name; - return ln->n; - } - else - { - struct node *n; - new_node (ln, &n); - n->nn->name = copied_name; - return n; - } -} - -/* Attempt to create a file named NAME in DIR for USER with MODE. Set *NODE - to the new node upon return. On any error, clear *NODE. *NODE should be - locked on success; no matter what, unlock DIR before returning. */ -error_t -netfs_attempt_create_file (struct iouser *user, struct node *dir, - char *name, mode_t mode, struct node **node) -{ - debug(""); - *node = 0; - mutex_unlock (&dir->lock); - return EOPNOTSUPP; -} - -/* Node NODE is being opened by USER, with FLAGS. NEWNODE is nonzero if we - just created this node. Return an error if we should not permit the open - to complete because of a permission restriction. */ -error_t -netfs_check_open_permissions (struct iouser *user, struct node *node, - int flags, int newnode) -{ - error_t err = 0; - - /*Cheks user's permissions*/ - if(flags & O_READ) - err = fshelp_access(&node->nn_stat, S_IREAD, user); - if(!err && (flags & O_WRITE)) - err = fshelp_access(&node->nn_stat, S_IWRITE, user); - if(!err && (flags & O_EXEC)) - err = fshelp_access(&node->nn_stat, S_IEXEC, user); - - debug("the mode of node: %o, return result: %d", - (node->nn_stat.st_mode & ~S_IFMT), err); - /*Return the result of the check*/ - return err; -} - -/* This should attempt a utimes call for the user specified by CRED on node - NODE, to change the atime to ATIME and the mtime to MTIME. */ -error_t -netfs_attempt_utimes (struct iouser *cred, struct node *node, - struct timespec *atime, struct timespec *mtime) -{ - debug(""); - return EOPNOTSUPP; -} - -/* Return the valid access types (bitwise OR of O_READ, O_WRITE, and O_EXEC) - in *TYPES for file NODE and user CRED. */ -error_t -netfs_report_access (struct iouser *cred, struct node *node, int *types) -{ - debug(""); - *types = 0; - return 0; -} - -/* Make sure that NP->nn_stat is filled with current information. CRED - identifies the user responsible for the operation. */ -error_t -netfs_validate_stat (struct node *node, struct iouser *cred) -{ - struct stat st; - - if (node->nn->ln) - st = node->nn->ln->st; - else - st = underlying_node_stat; - - debug("node: %p", node); - node->nn_translated = S_ISLNK (st.st_mode) ? S_IFLNK : 0; - node->nn_stat = st; - return 0; -} - -/* This should sync the file NODE completely to disk, for the user CRED. If - WAIT is set, return only after sync is completely finished. */ -error_t -netfs_attempt_sync (struct iouser *cred, struct node *node, int wait) -{ - debug(""); - return 0; -} - -error_t -netfs_get_dirents (struct iouser *cred, struct node *dir, - int first_entry, int max_entries, char **data, - mach_msg_type_number_t *data_len, - vm_size_t max_data_len, int *data_entries) -{ - error_t err; - int count = 0; - char *data_p; - size_t size = (max_data_len == 0 || max_data_len > DIRENTS_CHUNK_SIZE - ? DIRENTS_CHUNK_SIZE : max_data_len); - debug (""); - int - add_dirent (const char * name, ino_t ino, int type) - { - /*If the required number of dirents has not been listed yet*/ - if((max_entries == -1) || (count < max_entries)) - { - struct dirent hdr; - size_t name_len = strlen(name); - size_t sz = DIRENT_LEN(name_len); - - /*If there is no room for this dirent*/ - if ((data_p - *data) + sz > size) - { - if (max_data_len > 0) - return 1; - else - /* Try to grow our return buffer. */ - { - error_t err; - vm_address_t extension = (vm_address_t)(*data + size); - err = vm_allocate (mach_task_self (), &extension, - DIRENTS_CHUNK_SIZE, 0); - if (err) - { - munmap (*data, size); - return 1; - } - size += DIRENTS_CHUNK_SIZE; - } - } - - /*setup the dirent*/ - hdr.d_ino = ino; - hdr.d_reclen = sz; - hdr.d_type = type; - hdr.d_namlen = name_len; - memcpy(data_p, &hdr, DIRENT_NAME_OFFS); - strcpy(data_p + DIRENT_NAME_OFFS, name); - data_p += sz; - - /*count the new dirent*/ - ++count; - } - return 0; - } - int add_each_dev (struct vether_device *dev) - { - struct lnode *ln = (struct lnode *) dev; - add_dirent (ln->vdev.name, ln->st.st_ino, DT_CHR); - return 0; - } - if (dir != netfs_root_node) - return ENOTDIR; - - *data = mmap (0, size, PROT_READ | PROT_WRITE, MAP_ANON, 0, 0); - err = ((void *) *data == (void *) -1) ? errno : 0; - if (!err) - { - data_p = *data; - if (first_entry < 2 + get_dev_num ()) - { - add_dirent (".", 2, DT_DIR); - add_dirent ("..", 2, DT_DIR); - foreach_dev_do (add_each_dev); - } - - vm_address_t alloc_end = (vm_address_t)(*data + size); - vm_address_t real_end = round_page (data_p); - if (alloc_end > real_end) - munmap ((caddr_t) real_end, alloc_end - real_end); - *data_entries = count; - debug ("first_entry is %d, count is %d", first_entry, count); - *data_len = data_p - *data; - } - return err; -} - -/* Lookup NAME in DIR for USER; set *NODE to the found name upon return. If - the name was not found, then return ENOENT. On any error, clear *NODE. - (*NODE, if found, should be locked, this call should unlock DIR no matter - what.) */ -error_t netfs_attempt_lookup (struct iouser *user, struct node *dir, - char *name, struct node **node) -{ - error_t err = 0; - - debug ("dir: %p, file name: %s", dir, name); - - if (strcmp(name, ".") == 0) - { - netfs_nref(dir); - *node = dir; - return 0; - } - else if (strcmp(name, "..") == 0) - { - /*The supplied node is always root*/ - err = ENOENT; - *node = NULL; - - /*unlock the directory*/ - mutex_unlock (&dir->lock); - - /*stop here*/ - return err; - } - - *node = lookup (name); - mutex_lock (&(*node)->lock); - mutex_unlock (&dir->lock); - return 0; -} - -/* Delete NAME in DIR for USER. */ -error_t netfs_attempt_unlink (struct iouser *user, struct node *dir, - char *name) -{ - debug(""); - return EOPNOTSUPP; -} - -/* Note that in this one call, neither of the specific nodes are locked. */ -error_t netfs_attempt_rename (struct iouser *user, struct node *fromdir, - char *fromname, struct node *todir, - char *toname, int excl) -{ - debug(""); - return EOPNOTSUPP; -} - -/* Attempt to create a new directory named NAME in DIR for USER with mode - MODE. */ -error_t netfs_attempt_mkdir (struct iouser *user, struct node *dir, - char *name, mode_t mode) -{ - debug(""); - return EOPNOTSUPP; -} - -/* Attempt to remove directory named NAME in DIR for USER. */ -error_t netfs_attempt_rmdir (struct iouser *user, - struct node *dir, char *name) -{ - debug(""); - return EOPNOTSUPP; -} - -/* This should attempt a chmod call for the user specified by CRED on node - NODE, to change the owner to UID and the group to GID. */ -error_t netfs_attempt_chown (struct iouser *cred, struct node *node, - uid_t uid, uid_t gid) -{ - debug(""); - return EOPNOTSUPP; -} - -/* This should attempt a chauthor call for the user specified by CRED on node - NODE, to change the author to AUTHOR. */ -error_t netfs_attempt_chauthor (struct iouser *cred, struct node *node, - uid_t author) -{ - debug(""); - return EOPNOTSUPP; -} - -/* This should attempt a chmod call for the user specified by CRED on node - NODE, to change the mode to MODE. Unlike the normal Unix and Hurd meaning - of chmod, this function is also used to attempt to change files into other - types. If such a transition is attempted which is impossible, then return - EOPNOTSUPP. */ -error_t netfs_attempt_chmod (struct iouser *cred, struct node *node, - mode_t mode) -{ - error_t err = 0; - debug(""); - if (node->nn->ln == NULL) - return EOPNOTSUPP; - - mode &= ~S_ITRANS; - err = fshelp_isowner (&node->nn->ln->st, cred); - if (err) - return err; - mode |= node->nn->ln->st.st_mode & S_IFMT; - node->nn->ln->st.st_mode = mode; - fshelp_touch (&node->nn_stat, TOUCH_CTIME, multiplexer_maptime); - return err; -} - -/* Attempt to turn NODE (user CRED) into a symlink with target NAME. */ -error_t netfs_attempt_mksymlink (struct iouser *cred, struct node *node, - char *name) -{ - debug(""); - return EOPNOTSUPP; -} - -/* Attempt to turn NODE (user CRED) into a device. TYPE is either S_IFBLK or - S_IFCHR. */ -error_t netfs_attempt_mkdev (struct iouser *cred, struct node *node, - mode_t type, dev_t indexes) -{ - debug(""); - return EOPNOTSUPP; -} - -/* Attempt to set the passive translator record for FILE to ARGZ (of length - ARGZLEN) for user CRED. */ -error_t netfs_set_translator (struct iouser *cred, struct node *node, - char *argz, size_t argzlen) -{ - debug(""); - return EOPNOTSUPP; -} - -/* This should attempt a chflags call for the user specified by CRED on node - NODE, to change the flags to FLAGS. */ -error_t netfs_attempt_chflags (struct iouser *cred, struct node *node, - int flags) -{ - debug(""); - return EOPNOTSUPP; -} - -/* This should attempt to set the size of the file NODE (for user CRED) to - SIZE bytes long. */ -error_t netfs_attempt_set_size (struct iouser *cred, struct node *node, - off_t size) -{ - debug(""); - return EOPNOTSUPP; -} - -/*Fetches the filesystem status information*/ -error_t -netfs_attempt_statfs (struct iouser *cred, struct node *node, - struct statfs *st) -{ - debug(""); - return EOPNOTSUPP; -} - -/* This should sync the entire remote filesystem. If WAIT is set, return - only after sync is completely finished. */ -error_t netfs_attempt_syncfs (struct iouser *cred, int wait) -{ - debug(""); - return 0; -} - -/* Create a link in DIR with name NAME to FILE for USER. Note that neither - DIR nor FILE are locked. If EXCL is set, do not delete the target, but - return EEXIST if NAME is already found in DIR. */ -error_t netfs_attempt_link (struct iouser *user, struct node *dir, - struct node *file, char *name, int excl) -{ - debug(""); - return EOPNOTSUPP; -} - -/* Attempt to create an anonymous file related to DIR for USER with MODE. - Set *NODE to the returned file upon success. No matter what, unlock DIR. */ -error_t netfs_attempt_mkfile (struct iouser *user, struct node *dir, - mode_t mode, struct node **node) -{ - debug(""); - *node = 0; - mutex_unlock (&dir->lock); - return EOPNOTSUPP; -} - -/* Read the contents of NODE (a symlink), for USER, into BUF. */ -error_t netfs_attempt_readlink (struct iouser *user, struct node *node, char *buf) -{ - debug(""); - return EOPNOTSUPP; -} - -/* Read from the file NODE for user CRED starting at OFFSET and continuing for - up to *LEN bytes. Put the data at DATA. Set *LEN to the amount - successfully read upon return. */ -error_t netfs_attempt_read (struct iouser *cred, struct node *node, - off_t offset, size_t *len, void *data) -{ - debug(""); - return EOPNOTSUPP; -} - -/* Write to the file NODE for user CRED starting at OFSET and continuing for up - to *LEN bytes from DATA. Set *LEN to the amount seccessfully written upon - return. */ -error_t netfs_attempt_write (struct iouser *cred, struct node *node, - off_t offset, size_t *len, void *data) -{ - debug(""); - return EOPNOTSUPP; -} - -/* Node NP is all done; free all its associated storage. */ -void -netfs_node_norefs (struct node *node) -{ - debug("node: %p", node); - if (node->nn->ln) - node->nn->ln->n = NULL; - free (node->nn->name); - free (node->nn); - free (node); -} - |