+++ /dev/null
-/*
- * (c) 2010 Adam Lackorzynski <adam@os.inf.tu-dresden.de>,
- * Alexander Warg <warg@os.inf.tu-dresden.de>
- * economic rights: Technische Universität Dresden (Germany)
- *
- * This file is part of TUD:OS and distributed under the terms of the
- * GNU General Public License 2.
- * Please see the COPYING-GPL-2 file for details.
- *
- * As a special exception, you may use this file as part of a free software
- * library without restriction. Specifically, if other files instantiate
- * templates or use macros or inline functions from this file, or you compile
- * this file and link it with other files to produce an executable, this
- * file does not by itself cause the resulting executable to be covered by
- * the GNU General Public License. This exception does not however
- * invalidate any other reasons why the executable file might be covered by
- * the GNU General Public License.
- */
-#include "ns_fs.h"
-#include "vfs_api.h"
-#include "ro_file.h"
-
-#include <l4/re/dataspace>
-#include <l4/re/util/env_ns>
-#include <dirent.h>
-
-namespace L4Re { namespace Core {
-
-Simple_store_sz<Env_dir::Size> Ns_base_dir::store __attribute__((init_priority(1000)));
-
-void *
-Ns_base_dir::operator new(size_t s) throw()
-{
- if (s > Size)
- return 0;
-
- return store.alloc();
-}
-
-void
-Ns_base_dir::operator delete(void *b) throw()
-{
- store.free(b);
-}
-
-
-int
-Ns_dir::get_ds(const char *path, L4Re::Auto_cap<L4Re::Dataspace>::Cap *ds) throw()
-{
- L4Re::Auto_cap<L4Re::Dataspace>::Cap file(cap_alloc()->alloc<L4Re::Dataspace>(), cap_alloc());
-
- if (!file.is_valid())
- return -ENOMEM;
-
- int err = _ns->query(path, file.get());
-
- if (err < 0)
- return -ENOENT;
-
- *ds = file;
- return err;
-}
-
-int
-Ns_dir::get_entry(const char *path, int flags, mode_t mode,
- Ref_ptr<L4Re::Vfs::File> *f) throw()
-{
- (void)mode; (void)flags;
- if (!*path)
- {
- *f = this;
- return 0;
- }
-
- L4Re::Auto_cap<Dataspace>::Cap file;
- int err = get_ds(path, &file);
-
- if (err < 0)
- return -ENOENT;
-
- // FIXME: should check if it is a dataspace, somehow
- L4Re::Vfs::File *fi = 0;
-
- L4::Cap<L4Re::Namespace> nsc
- = L4::cap_dynamic_cast<L4Re::Namespace>(file.get());
-
- if (!nsc.is_valid())
- fi = new Ro_file(file.get());
- else // use mat protocol here!!
- fi = new Ns_dir(nsc);
-
- if (!fi)
- return -ENOMEM;
-
- file.release();
- *f = fi;
- return 0;
-}
-
-int
-Ns_dir::faccessat(const char *path, int mode, int flags) throw()
-{
- (void)flags;
- L4Re::Auto_cap<void>::Cap tmpcap(cap_alloc()->alloc<void>(), cap_alloc());
-
- if (!tmpcap.is_valid())
- return -ENOMEM;
-
- if (_ns->query(path, tmpcap.get()))
- return -ENOENT;
-
- if (mode & W_OK)
- return -EACCES;
-
- return 0;
-}
-
-int
-Ns_dir::fstat64(struct stat64 *b) const throw()
-{
- b->st_dev = 1;
- b->st_ino = 1;
- b->st_mode = S_IRWXU | S_IFDIR;
- b->st_nlink = 0;
- b->st_uid = 0;
- b->st_gid = 0;
- b->st_rdev = 0;
- b->st_size = 0;
- b->st_blksize = 0;
- b->st_blocks = 0;
- b->st_atime = 0;
- b->st_mtime = 0;
- b->st_ctime = 0;
- return 0;
-}
-
-ssize_t
-Ns_dir::getdents(char *buf, size_t sz) throw()
-{
- struct dirent64 *d = (struct dirent64 *)buf;
- ssize_t ret = 0;
- l4_addr_t infoaddr;
- size_t infosz;
-
- L4Re::Auto_cap<Dataspace>::Cap dirinfofile;
- int err = get_ds(".dirinfo", &dirinfofile);
- if (err)
- return 0;
-
- infosz = dirinfofile->size();
- if (infosz <= 0)
- return 0;
-
- infoaddr = L4_PAGESIZE;
- err = L4Re::Env::env()->rm()->attach(&infoaddr, infosz,
- Rm::Search_addr | Rm::Read_only,
- dirinfofile.get(), 0);
- char *p = (char *)infoaddr + _current_dir_pos;
- char *end = (char *)infoaddr + infosz;
-
- while (d && p < end)
- {
- // parse lines of dirinfofile
- long len;
- for (len = 0; p < end && *p >= '0' && *p <= '9'; ++p)
- {
- len *= 10;
- len += *p - '0';
- }
- if (len)
- {
- // skip colon
- p++;
- if (p + len >= end)
- return 0; // error in dirinfofile
-
- unsigned l = len + 1;
- if (l > sizeof(d->d_name))
- l = sizeof(d->d_name);
-
- unsigned n = offsetof (struct dirent64, d_name) + l;
- n = (n + sizeof(long) - 1) & ~(sizeof(long) - 1);
-
- if (n > sz)
- break;
-
- d->d_ino = 1;
- d->d_off = 0;
- memcpy(d->d_name, p, len);
- d->d_name[l - 1] = 0;
- d->d_reclen = n;
- d->d_type = DT_REG;
- ret += n;
- sz -= n;
- d = (struct dirent64 *)((unsigned long)d + n);
- }
-
- // next infodirfile line
- while (p < end && *p && *p != '\n' && *p != '\r')
- p++;
- while (p < end && *p && (*p == '\n' || *p == '\r'))
- p++;
- }
-
- _current_dir_pos += p - (char *)infoaddr;
-
- if (!ret) // hack since we should only reset this at open times
- _current_dir_pos = 0;
-
- L4Re::Env::env()->rm()->detach(infoaddr, 0);
-
- return ret;
-}
-
-int
-Env_dir::get_ds(const char *path, L4Re::Auto_cap<L4Re::Dataspace>::Cap *ds) throw()
-{
- Vfs::Path p(path);
- Vfs::Path first = p.strip_first();
-
- if (first.empty())
- return -ENOENT;
-
- L4::Cap<L4Re::Namespace>
- c = _env->get_cap<L4Re::Namespace>(first.path(), first.length());
-
- if (!c.is_valid())
- return -ENOENT;
-
- if (p.empty())
- {
- *ds = L4Re::Auto_cap<L4Re::Dataspace>::Cap(L4::cap_reinterpret_cast<L4Re::Dataspace>(c));
- return 0;
- }
-
- L4Re::Auto_cap<L4Re::Dataspace>::Cap file(cap_alloc()->alloc<L4Re::Dataspace>(), cap_alloc());
-
- if (!file.is_valid())
- return -ENOMEM;
-
- int err = c->query(p.path(), p.length(), file.get());
-
- if (err < 0)
- return -ENOENT;
-
- *ds = file;
- return err;
-}
-
-int
-Env_dir::get_entry(const char *path, int flags, mode_t mode,
- Ref_ptr<L4Re::Vfs::File> *f) throw()
-{
- (void)mode; (void)flags;
- if (!*path)
- {
- *f = this;
- return 0;
- }
-
- L4Re::Auto_cap<Dataspace>::Cap file;
- int err = get_ds(path, &file);
-
- if (err < 0)
- return -ENOENT;
-
- // FIXME: should check if it is a dataspace, somehow
- L4Re::Vfs::File *fi = 0;
-
- L4::Cap<L4Re::Namespace> nsc
- = L4::cap_dynamic_cast<L4Re::Namespace>(file.get());
-
- if (!nsc.is_valid())
- fi = new Ro_file(file.get());
- else // use mat protocol here!!
- fi = new Ns_dir(nsc);
-
- if (!fi)
- return -ENOMEM;
-
- file.release();
- *f = fi;
- return 0;
-}
-
-int
-Env_dir::faccessat(const char *path, int mode, int flags) throw()
-{
- (void)flags;
- Vfs::Path p(path);
- Vfs::Path first = p.strip_first();
-
- if (first.empty())
- return -ENOENT;
-
- L4::Cap<L4Re::Namespace>
- c = _env->get_cap<L4Re::Namespace>(first.path(), first.length());
-
- if (!c.is_valid())
- return -ENOENT;
-
- if (p.empty())
- {
- if (mode & W_OK)
- return -EACCES;
-
- return 0;
- }
-
- L4Re::Auto_cap<void>::Cap tmpcap(cap_alloc()->alloc<void>(), cap_alloc());
-
- if (!tmpcap.is_valid())
- return -ENOMEM;
-
- if (c->query(p.path(), p.length(), tmpcap.get()))
- return -ENOENT;
-
- if (mode & W_OK)
- return -EACCES;
-
- return 0;
-}
-
-bool
-Env_dir::check_type(Env::Cap_entry const *e, long protocol)
-{
- L4::Cap<L4::Meta> m(e->cap);
- return m->supports(protocol).label();
-}
-
-int
-Env_dir::fstat64(struct stat64 *b) const throw()
-{
- b->st_dev = 1;
- b->st_ino = 1;
- b->st_mode = S_IRWXU | S_IFDIR;
- b->st_nlink = 0;
- b->st_uid = 0;
- b->st_gid = 0;
- b->st_rdev = 0;
- b->st_size = 0;
- b->st_blksize = 0;
- b->st_blocks = 0;
- b->st_atime = 0;
- b->st_mtime = 0;
- b->st_ctime = 0;
- return 0;
-}
-
-ssize_t
-Env_dir::getdents(char *buf, size_t sz) throw()
-{
- struct dirent64 *d = (struct dirent64 *)buf;
- ssize_t ret = 0;
-
- while (d
- && _current_cap_entry
- && _current_cap_entry->flags != ~0UL)
- {
- unsigned l = strlen(_current_cap_entry->name) + 1;
- if (l > sizeof(d->d_name))
- l = sizeof(d->d_name);
-
- unsigned n = offsetof (struct dirent64, d_name) + l;
- n = (n + sizeof(long) - 1) & ~(sizeof(long) - 1);
-
- if (n <= sz)
- {
- d->d_ino = 1;
- d->d_off = 0;
- memcpy(d->d_name, _current_cap_entry->name, l);
- d->d_name[l - 1] = 0;
- d->d_reclen = n;
- if (check_type(_current_cap_entry, L4Re::Protocol::Namespace))
- d->d_type = DT_DIR;
- else if (check_type(_current_cap_entry, L4Re::Protocol::Dataspace))
- d->d_type = DT_REG;
- else
- d->d_type = DT_UNKNOWN;
- ret += n;
- sz -= n;
- d = (struct dirent64 *)((unsigned long)d + n);
- _current_cap_entry++;
- }
- else
- return ret;
- }
-
- // bit of a hack because we should only (re)set this when opening the dir
- if (!ret)
- _current_cap_entry = _env->initial_caps();
-
- return ret;
-}
-
-}}
projects / l4.git / blobdiff