gnunet-fuse

GNUnet file-sharing directory mounting via FUSE
Log | Files | Refs | Submodules | README | LICENSE

commit dfcef4f57872516f3127e21098cbe8b03ea2828b
parent 1981d78a7bc7203c2a62af0627e0045ec13e4273
Author: David Barksdale <amatus.amongus@gmail.com>
Date:   Wed, 30 May 2007 02:07:24 +0000

Adding version 0.2 to svn

Diffstat:
AAUTHORS | 1+
ACOPYING | 340+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
AChangeLog | 4++++
AINSTALL | 234+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
AMakefile.am | 13+++++++++++++
ANEWS | 1+
AREADME | 2++
Aconfigure.ac | 60++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Adirectory.c | 140+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Adirent.c | 208+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Agetattr.c | 26++++++++++++++++++++++++++
Agettext.h | 6++++++
Agnfs.h | 56++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Amain.c | 84+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Aopen.c | 30++++++++++++++++++++++++++++++
Aread.c | 95+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Areaddir.c | 72++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
17 files changed, 1372 insertions(+), 0 deletions(-)

diff --git a/AUTHORS b/AUTHORS @@ -0,0 +1 @@ +David Barksdale <amatus@gnu.org> diff --git a/COPYING b/COPYING @@ -0,0 +1,340 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. This +General Public License applies to most of the Free Software +Foundation's software and to any other program whose authors commit to +using it. (Some other Free Software Foundation software is covered by +the GNU Library General Public License instead.) You can apply it to +your programs, too. + + When we speak of free software, we are referring to freedom, not +price. Our General Public Licenses are designed to make sure that you +have the freedom to distribute copies of free software (and charge for +this service if you wish), that you receive source code or can get it +if you want it, that you can change the software or use pieces of it +in new free programs; and that you know you can do these things. + + To protect your rights, we need to make restrictions that forbid +anyone to deny you these rights or to ask you to surrender the rights. +These restrictions translate to certain responsibilities for you if you +distribute copies of the software, or if you modify it. + + For example, if you distribute copies of such a program, whether +gratis or for a fee, you must give the recipients all the rights that +you have. You must make sure that they, too, receive or can get the +source code. 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It is safest +to attach them to the start of each source file to most effectively +convey the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + <one line to give the program's name and a brief idea of what it does.> + Copyright (C) <year> <name of author> + + This program 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 of the License, or + (at your option) any later version. + + This program 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 this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + <signature of Ty Coon>, 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/ChangeLog b/ChangeLog @@ -0,0 +1,4 @@ +2007-05-29 David Barksdale <amatus@gnu.org> 0.2 +* Fixed ref-counting bug in gn_dirent_find +2007-05-28 David Barksdale <amatus@gnu.org> 0.1 +* Initial version diff --git a/INSTALL b/INSTALL @@ -0,0 +1,234 @@ +Installation Instructions +************************* + +Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2004, 2005, +2006 Free Software Foundation, Inc. + +This file is free documentation; the Free Software Foundation gives +unlimited permission to copy, distribute and modify it. + +Basic Installation +================== + +Briefly, the shell commands `./configure; make; make install' should +configure, build, and install this package. The following +more-detailed instructions are generic; see the `README' file for +instructions specific to this package. + + The `configure' shell script attempts to guess correct values for +various system-dependent variables used during compilation. It uses +those values to create a `Makefile' in each directory of the package. +It may also create one or more `.h' files containing system-dependent +definitions. Finally, it creates a shell script `config.status' that +you can run in the future to recreate the current configuration, and a +file `config.log' containing compiler output (useful mainly for +debugging `configure'). + + It can also use an optional file (typically called `config.cache' +and enabled with `--cache-file=config.cache' or simply `-C') that saves +the results of its tests to speed up reconfiguring. Caching is +disabled by default to prevent problems with accidental use of stale +cache files. + + If you need to do unusual things to compile the package, please try +to figure out how `configure' could check whether to do them, and mail +diffs or instructions to the address given in the `README' so they can +be considered for the next release. If you are using the cache, and at +some point `config.cache' contains results you don't want to keep, you +may remove or edit it. + + The file `configure.ac' (or `configure.in') is used to create +`configure' by a program called `autoconf'. You need `configure.ac' if +you want to change it or regenerate `configure' using a newer version +of `autoconf'. + +The simplest way to compile this package is: + + 1. `cd' to the directory containing the package's source code and type + `./configure' to configure the package for your system. + + Running `configure' might take a while. While running, it prints + some messages telling which features it is checking for. + + 2. Type `make' to compile the package. + + 3. Optionally, type `make check' to run any self-tests that come with + the package. + + 4. Type `make install' to install the programs and any data files and + documentation. + + 5. You can remove the program binaries and object files from the + source code directory by typing `make clean'. To also remove the + files that `configure' created (so you can compile the package for + a different kind of computer), type `make distclean'. There is + also a `make maintainer-clean' target, but that is intended mainly + for the package's developers. If you use it, you may have to get + all sorts of other programs in order to regenerate files that came + with the distribution. + +Compilers and Options +===================== + +Some systems require unusual options for compilation or linking that the +`configure' script does not know about. Run `./configure --help' for +details on some of the pertinent environment variables. + + You can give `configure' initial values for configuration parameters +by setting variables in the command line or in the environment. Here +is an example: + + ./configure CC=c99 CFLAGS=-g LIBS=-lposix + + *Note Defining Variables::, for more details. + +Compiling For Multiple Architectures +==================================== + +You can compile the package for more than one kind of computer at the +same time, by placing the object files for each architecture in their +own directory. To do this, you can use GNU `make'. `cd' to the +directory where you want the object files and executables to go and run +the `configure' script. `configure' automatically checks for the +source code in the directory that `configure' is in and in `..'. + + With a non-GNU `make', it is safer to compile the package for one +architecture at a time in the source code directory. After you have +installed the package for one architecture, use `make distclean' before +reconfiguring for another architecture. + +Installation Names +================== + +By default, `make install' installs the package's commands under +`/usr/local/bin', include files under `/usr/local/include', etc. You +can specify an installation prefix other than `/usr/local' by giving +`configure' the option `--prefix=PREFIX'. + + You can specify separate installation prefixes for +architecture-specific files and architecture-independent files. If you +pass the option `--exec-prefix=PREFIX' to `configure', the package uses +PREFIX as the prefix for installing programs and libraries. +Documentation and other data files still use the regular prefix. + + In addition, if you use an unusual directory layout you can give +options like `--bindir=DIR' to specify different values for particular +kinds of files. Run `configure --help' for a list of the directories +you can set and what kinds of files go in them. + + If the package supports it, you can cause programs to be installed +with an extra prefix or suffix on their names by giving `configure' the +option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'. + +Optional Features +================= + +Some packages pay attention to `--enable-FEATURE' options to +`configure', where FEATURE indicates an optional part of the package. +They may also pay attention to `--with-PACKAGE' options, where PACKAGE +is something like `gnu-as' or `x' (for the X Window System). The +`README' should mention any `--enable-' and `--with-' options that the +package recognizes. + + For packages that use the X Window System, `configure' can usually +find the X include and library files automatically, but if it doesn't, +you can use the `configure' options `--x-includes=DIR' and +`--x-libraries=DIR' to specify their locations. + +Specifying the System Type +========================== + +There may be some features `configure' cannot figure out automatically, +but needs to determine by the type of machine the package will run on. +Usually, assuming the package is built to be run on the _same_ +architectures, `configure' can figure that out, but if it prints a +message saying it cannot guess the machine type, give it the +`--build=TYPE' option. TYPE can either be a short name for the system +type, such as `sun4', or a canonical name which has the form: + + CPU-COMPANY-SYSTEM + +where SYSTEM can have one of these forms: + + OS KERNEL-OS + + See the file `config.sub' for the possible values of each field. If +`config.sub' isn't included in this package, then this package doesn't +need to know the machine type. + + If you are _building_ compiler tools for cross-compiling, you should +use the option `--target=TYPE' to select the type of system they will +produce code for. + + If you want to _use_ a cross compiler, that generates code for a +platform different from the build platform, you should specify the +"host" platform (i.e., that on which the generated programs will +eventually be run) with `--host=TYPE'. + +Sharing Defaults +================ + +If you want to set default values for `configure' scripts to share, you +can create a site shell script called `config.site' that gives default +values for variables like `CC', `cache_file', and `prefix'. +`configure' looks for `PREFIX/share/config.site' if it exists, then +`PREFIX/etc/config.site' if it exists. Or, you can set the +`CONFIG_SITE' environment variable to the location of the site script. +A warning: not all `configure' scripts look for a site script. + +Defining Variables +================== + +Variables not defined in a site shell script can be set in the +environment passed to `configure'. However, some packages may run +configure again during the build, and the customized values of these +variables may be lost. In order to avoid this problem, you should set +them in the `configure' command line, using `VAR=value'. For example: + + ./configure CC=/usr/local2/bin/gcc + +causes the specified `gcc' to be used as the C compiler (unless it is +overridden in the site shell script). + +Unfortunately, this technique does not work for `CONFIG_SHELL' due to +an Autoconf bug. Until the bug is fixed you can use this workaround: + + CONFIG_SHELL=/bin/bash /bin/bash ./configure CONFIG_SHELL=/bin/bash + +`configure' Invocation +====================== + +`configure' recognizes the following options to control how it operates. + +`--help' +`-h' + Print a summary of the options to `configure', and exit. + +`--version' +`-V' + Print the version of Autoconf used to generate the `configure' + script, and exit. + +`--cache-file=FILE' + Enable the cache: use and save the results of the tests in FILE, + traditionally `config.cache'. FILE defaults to `/dev/null' to + disable caching. + +`--config-cache' +`-C' + Alias for `--cache-file=config.cache'. + +`--quiet' +`--silent' +`-q' + Do not print messages saying which checks are being made. To + suppress all normal output, redirect it to `/dev/null' (any error + messages will still be shown). + +`--srcdir=DIR' + Look for the package's source code in directory DIR. Usually + `configure' can determine that directory automatically. + +`configure' also accepts some other, not widely useful, options. Run +`configure --help' for more details. + diff --git a/Makefile.am b/Makefile.am @@ -0,0 +1,13 @@ +bin_PROGRAMS = gnunet-fs +gnunet_fs_SOURCES = \ + directory.c \ + dirent.c \ + getattr.c \ + main.c \ + open.c \ + read.c \ + readdir.c \ + gnfs.h \ + gettext.h + +gnunet_fs_CPPFLAGS = -DFUSE_USE_VERSION=26 -D_REENTRANT diff --git a/NEWS b/NEWS @@ -0,0 +1 @@ +see ChangeLog diff --git a/README b/README @@ -0,0 +1,2 @@ +gnunet-fuse is a FUSE filesystem that provides the contents of a GNUnet +directory diff --git a/configure.ac b/configure.ac @@ -0,0 +1,60 @@ +AC_INIT(gnunet-fuse, 0.2) +AM_INIT_AUTOMAKE +AM_CONFIG_HEADER(config.h) + +AC_PROG_CC +AM_PROG_CC_C_O +dnl AC_PROG_LIBTOOL +export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:$PKG_CONFIG_PATH + +PKG_CHECK_MODULES(GLIB, [glib-2.0]) +PKG_CHECK_MODULES(FUSE, [fuse >= 2.6]) + +# test for GNUnet core +gnunet=0 +AC_MSG_CHECKING(for GNUnet core) +AC_ARG_WITH(gnunet, + [ --with-gnunet=PFX Base of GNUnet installation], + [AC_MSG_RESULT([$with_gnunet]) + case $with_gnunet in + no) + ;; + yes) + AC_CHECK_HEADERS(GNUnet/gnunet_util.h, + AC_CHECK_LIB([gnunetutil_boot], [GNUNET_init], + gnunet=1)) + ;; + *) + LDFLAGS="-L$with_gnunet/lib $LDFLAGS" + LIBPATH="$with_gnunet/lib $LIBPATH" + CPPFLAGS="-I$with_gnunet/include $CPPFLAGS" + INCLUDEPATH="$with_gnunet/include $INCLUDEPATH" + AC_CHECK_HEADERS(GNUnet/gnunet_util.h, + AC_CHECK_LIB([gnunetutil_boot], [GNUNET_init], + EXT_LIB_PATH="-L$with_gnunet/lib $EXT_LIB_PATH" + gnunet=1)) + ;; + esac + ], + [AC_MSG_RESULT([--with-gnunet not specified]) + AC_CHECK_HEADERS(gnunet_util.h, + AC_CHECK_LIB([GNUnet/gnunet_util.h], [os_init], + gnunet=1))]) +if test "$gnunet" != 1 +then + AC_MSG_ERROR([gnunet-fuse requires GNUnet]) +fi +AC_CHECK_HEADERS([GNUnet/gnunet_ecrs_lib.h GNUnet/gnunet_getoption_lib.h],, + AC_MSG_ERROR([compiling gnunet-fuse requires GNUnet core headers] +)) + +AC_CHECK_LIB(gnunetutil_boot,GNUNET_init,, + AC_MSG_ERROR([gnunet-fuse requires GNUnet-Util])) +AC_CHECK_LIB(gnunetecrs,ECRS_createMetaData,, + AC_MSG_ERROR([gnunet-fuse requires ECRS])) + +CFLAGS="$CFLAGS -Wall -W $GLIB_CFLAGS $FUSE_CFLAGS" +LIBS="$LIBS $GLIB_LIBS $FUSE_LIBS" + +AC_CONFIG_FILES([Makefile]) +AC_OUTPUT diff --git a/directory.c b/directory.c @@ -0,0 +1,140 @@ +#include <sys/mman.h> +#include <unistd.h> +#include <string.h> +#include <errno.h> +#include <glib.h> +#include <GNUnet/gnunet_ecrs_lib.h> +#include "gnfs.h" + +static void dpcb(unsigned long long totalBytes, + unsigned long long completedBytes, cron_t eta, + unsigned long long lastBlockOffset, const char *lastBlock, + unsigned int lastBlockSize, void *cls) +{ + (void)totalBytes; + (void)completedBytes; + (void)eta; + (void)lastBlockOffset; + (void)lastBlock; + (void)lastBlockSize; + (void)cls; +} + +static int tt(void *cls) +{ + (void)cls; + return OK; +} + +struct dir_for_each_data +{ + gn_dir_for_each_callback cb; + void *data; + struct dirent *de; +}; + +static int dir_for_each_cb(const ECRS_FileInfo *fi, const HashCode512 *key, + int isRoot, void *data) +{ + struct dir_for_each_data *d = data; + struct dirent *de; + gchar *filename, *newpath, type; + size_t len, rlen; + int ret; + + if(isRoot == YES) + return d->cb(d->de, NULL, fi, key, isRoot, d->data); + + /* Figure out the filename and type from metadata */ + filename = ECRS_getFromMetaData(fi->meta, EXTRACTOR_FILENAME); + if(filename == NULL) + { + GE_LOG(ectx, GE_BULK | GE_USER | GE_WARNING, + "%s: dirent has no filename\n", __FUNCTION__); + return OK; + } + len = strlen(filename); + if(ECRS_isDirectory(fi->meta) == YES) + { + if(filename[len - 1] == '/' || filename[len - 1] == '\\') + filename[len - 1] = '\0'; + type = DE_DIR; + } + else + type = DE_FILE; + + /* Create newpath, the path to this entry */ + rlen = strlen(d->de->de_path); + newpath = MALLOC(rlen + len + 1); + strcpy(newpath, d->de->de_path); + if(d->de->de_path[rlen - 1] != G_DIR_SEPARATOR) + strcat(newpath, G_DIR_SEPARATOR_S); + strcat(newpath, filename); + + /* Create a new dirent for this entry */ + de = gn_dirent_new(newpath, fi->uri, type); + + /* Add it to the cache */ + gn_dirent_cache(de); + + /* Call the callback function */ + ret = d->cb(de, filename, fi, key, isRoot, d->data); + + /* Clean up */ + gn_dirent_put(de); + FREE(filename); + FREE(newpath); + return ret; +} + +int gn_directory_for_each(struct dirent *de, gn_dir_for_each_callback cb, + void *data) +{ + gchar filename[] = "/tmp/gnfs_dir.XXXXXX"; + struct ECRS_MetaData *md; + struct dir_for_each_data d; + void *mem; + int ret, fd; + guint64 len; + + fd = mkstemp(filename); + if(fd == -1) + { + GE_LOG_STRERROR_FILE(ectx, GE_BULK | GE_USER | GE_ERROR, + "mkstemp", filename); + goto err_out; + } + ret = ECRS_downloadFile(ectx, cfg, de->de_uri, filename, anonymity, + dpcb, NULL, tt, NULL); + if(ret != OK) + { + GE_LOG(ectx, GE_BULK | GE_USER | GE_ERROR, + "%s: failed to download directory\n", __FUNCTION__); + goto err_out_unlink; + } + if(disk_file_size(ectx, filename, &len, YES) != OK || len == 0) + { + GE_LOG(ectx, GE_BULK | GE_USER | GE_ERROR, + "%s: file empty\n", __FUNCTION__); + goto err_out_unlink; + } + mem = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0); + if(mem == MAP_FAILED) + { + GE_LOG_STRERROR(ectx, GE_BULK | GE_USER | GE_ERROR, "mmap"); + goto err_out_unlink; + } + d.cb = cb; + d.data = data; + d.de = de; + ECRS_listDirectory(ectx, mem, len, &md, dir_for_each_cb, &d); + munmap(mem, len); + unlink(filename); + close(fd); + return 0; +err_out_unlink: + unlink(filename); +err_out: + close(fd); + return -1; +} diff --git a/dirent.c b/dirent.c @@ -0,0 +1,208 @@ +#include <glib.h> +#include <string.h> +#include "gnfs.h" + +GHashTable *path_hash; +struct MUTEX *path_mutex; + +/* + * Create a new dirent with a reference, path and uri are copied + */ +struct dirent *gn_dirent_new(const gchar *path, struct ECRS_URI *uri, + gchar type) +{ + struct dirent *de; + + de = MALLOC(sizeof(*de)); + de->de_path = STRDUP(path); + de->de_uri = ECRS_dupUri(uri); + de->de_type = type; + de->de_refs = 1; + return de; +} + +/* + * Reference a dirent from the cache, call gn_dirent_put when finished with it + */ +struct dirent *gn_dirent_get(const gchar *path) +{ + struct dirent *de; + + MUTEX_LOCK(path_mutex); + de = g_hash_table_lookup(path_hash, path); + if(de != NULL) + de->de_refs++; + MUTEX_UNLOCK(path_mutex); + return de; +} + +/* + * Reference a dirent, call gn_dirent_put when finished + */ +void gn_dirent_ref(struct dirent *de) +{ + MUTEX_LOCK(path_mutex); + de->de_refs++; + MUTEX_UNLOCK(path_mutex); +} + +static void dirent_destroy(gpointer data) +{ + struct dirent *de = data; + + de->de_refs--; + if(de->de_refs < 1) + { + FREE(de->de_path); + ECRS_freeUri(de->de_uri); + FREE(de); + } +} + +/* + * Release a reference to a dirent + */ +void gn_dirent_put(struct dirent *de) +{ + MUTEX_LOCK(path_mutex); + dirent_destroy(de); + MUTEX_UNLOCK(path_mutex); +} + +void gn_dirent_cache_init(void) +{ + path_hash = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, + dirent_destroy); + path_mutex = MUTEX_CREATE(0); +} + +/* + * Add a dirent to the cache + */ +void gn_dirent_cache(struct dirent *de) +{ + gchar *uristr; + + uristr = ECRS_uriToString(de->de_uri); + GE_LOG(ectx, GE_BULK | GE_DEVELOPER | GE_DEBUG, + "%s: name '%s' uri '%s'\n", __FUNCTION__, de->de_path, uristr); + FREE(uristr); + /* TODO: Here we need to see if the cache has gotten too big and empty + * it */ + MUTEX_LOCK(path_mutex); + de->de_refs++; + g_hash_table_replace(path_hash, de->de_path, de); + MUTEX_UNLOCK(path_mutex); +} + +struct dirent_find_data +{ + const gchar *name; + struct dirent **de; + gboolean found; +}; + +static gboolean dirent_find(struct dirent *de, const gchar *filename, + const ECRS_FileInfo *fi, const HashCode512 *key, int isRoot, void *data) +{ + struct dirent_find_data *dfd = data; + + (void)fi; + (void)key; + + if(isRoot == YES || dfd->found == 1 || strcmp(filename, dfd->name) != 0) + return OK; + + dfd->found = 1; + gn_dirent_ref(de); + *dfd->de = de; + return SYSERR; /* It would be nice if this actually worked */ +} + +/* + * Retrieve a dirent with a reference given it's (normalized) path. + */ +struct dirent *gn_dirent_find(const gchar *path) +{ + struct dirent *de, *next_de; + size_t len, plen; + gchar *ppath; + struct dirent_find_data dfd; + + /* Start de off at the root */ + MUTEX_LOCK(root_mutex); + de = root_de; + gn_dirent_ref(de); + MUTEX_UNLOCK(root_mutex); + + /* Root shortcut before we grab path_mutex */ + if(strcmp(path, G_DIR_SEPARATOR_S) == 0) + return de; + + /* Allocate partial path buffer and start it at the root */ + len = strlen(path); + ppath = MALLOC(len + 1); + plen = 0; + + /* Save pointer to next de for the callback function */ + dfd.de = &next_de; + + /* While we haven't reached the end of path, we have work to do */ + while(plen < len) + { + /* Save pointer to ppath end */ + dfd.name = &ppath[plen + 1]; + + /* Cat next path component */ + ppath[plen++] = G_DIR_SEPARATOR; + for(;path[plen] != '\0' && path[plen] != G_DIR_SEPARATOR;plen++) + ppath[plen] = path[plen]; + ppath[plen] = '\0'; + + /* Look it up in the cache first */ + next_de = gn_dirent_get(ppath); + + /* If we found it then continue */ + if(next_de != NULL) + { + GE_LOG(ectx, GE_BULK | GE_DEVELOPER | GE_DEBUG, + "%s: found in cache '%s'\n", __FUNCTION__, + next_de->de_path); + gn_dirent_put(de); + de = next_de; + continue; + } + + /* We need to find it by listing its parent directory, de */ + if(de->de_type != DE_DIR) + { + gn_dirent_put(de); + de = NULL; + break; + } + dfd.found = 0; + gn_directory_for_each(de, dirent_find, &dfd); + + /* Not found? Then why did they ask us? */ + if(!dfd.found) + { + GE_LOG(ectx, GE_BULK | GE_DEVELOPER | GE_DEBUG, + "%s: not found!\n", __FUNCTION__); + gn_dirent_put(de); + de = NULL; + break; + } + + /* Continue to the next path element */ + GE_LOG(ectx, GE_BULK | GE_DEVELOPER | GE_DEBUG, + "%s: found in directory '%s'\n", __FUNCTION__, + next_de->de_path); + gn_dirent_put(de); + de = next_de; + } + + /* Done */ + FREE(ppath); + + return de; +} diff --git a/getattr.c b/getattr.c @@ -0,0 +1,26 @@ +#include <sys/stat.h> +#include <stdio.h> +#include <string.h> +#include <errno.h> +#include <fuse.h> +#include "gnfs.h" + +int gn_getattr(const char *path, struct stat *stbuf) +{ + struct dirent *de; + + GE_LOG(ectx, GE_BULK | GE_DEVELOPER | GE_DEBUG, "getattr for '%s'\n", + path); + + de = gn_dirent_find(path); + if(de == NULL) + return -ENOENT; + + memset(stbuf, 0, sizeof(*stbuf)); + stbuf->st_mode = 0555; + stbuf->st_mode |= de->de_type == DE_DIR ? S_IFDIR : S_IFREG; + stbuf->st_nlink = 1; + stbuf->st_size = ECRS_fileSize(de->de_uri); + gn_dirent_put(de); + return 0; +} diff --git a/gettext.h b/gettext.h @@ -0,0 +1,6 @@ +#ifndef _GETTEXT_H_ +#define _GETTEXT_H_ + +#define gettext_noop(x) x + +#endif /* _GETTEXT_H_ */ diff --git a/gnfs.h b/gnfs.h @@ -0,0 +1,56 @@ +#ifndef _GNFS_H_ +#define _GNFS_H_ + +#include <sys/types.h> +#include <sys/stat.h> +#include <glib.h> +#include <fuse.h> +#include <GNUnet/gnunet_util_boot.h> +#include <GNUnet/gnunet_ecrs_lib.h> + +/* Some gnunet macros need these */ +#define _(x) x +#define STRERROR strerror + +struct dirent +{ + gchar *de_path; + struct ECRS_URI *de_uri; + gchar de_type; +#define DE_FILE 'f' +#define DE_DIR 'd' + gint de_refs; +}; + +typedef int (*gn_dir_for_each_callback)(struct dirent *de, + const gchar *filename, const ECRS_FileInfo *fi, const HashCode512 *key, + int isRoot, void *data); + +extern struct GC_Configuration *cfg; +extern struct GE_Context *ectx; +extern unsigned int anonymity; +extern struct dirent *root_de; +extern struct MUTEX *root_mutex; + +/* dirent.c */ +struct dirent *gn_dirent_new(const gchar *path, struct ECRS_URI *uri, + gchar type); +struct dirent *gn_dirent_get(const gchar *path); +void gn_dirent_ref(struct dirent *de); +void gn_dirent_put(struct dirent *de); +void gn_dirent_cache_init(void); +void gn_dirent_cache(struct dirent *de); +struct dirent *gn_dirent_find(const gchar *path); + +/* directory.c */ +int gn_directory_for_each(struct dirent *de, gn_dir_for_each_callback cb, + void *data); + +int gn_getattr(const char *path, struct stat *stbuf); +int gn_readdir(const char *path, void *buf, fuse_fill_dir_t filler, + off_t offset, struct fuse_file_info *fi); +int gn_open(const char *path, struct fuse_file_info *fi); +int gn_read(const char *path, char *buf, size_t size, off_t offset, + struct fuse_file_info *fi); + +#endif /* _GNFS_H_ */ diff --git a/main.c b/main.c @@ -0,0 +1,84 @@ +#include <stdio.h> +#include <string.h> +#include <glib.h> +#include <fuse.h> +#include <GNUnet/gnunet_directories.h> +#include <GNUnet/gnunet_util_boot.h> +#include <GNUnet/gnunet_util_error_loggers.h> +#include <GNUnet/gnunet_ecrs_lib.h> +#include "gnfs.h" +#include "gettext.h" + +struct GC_Configuration *cfg; +struct GE_Context *ectx; +static char *cfgFilename = DEFAULT_CLIENT_CONFIG_FILE; +static char *cfgLogfile = "/tmp/gnunet_fuse.log"; +unsigned int anonymity = 1; + +/* Root directory entry, currently used by the dirent cache when asked for / */ +struct dirent *root_de; +struct MUTEX *root_mutex; + +static struct fuse_operations fops = +{ + .getattr = gn_getattr, + .readdir = gn_readdir, + .open = gn_open, + .read = gn_read, +}; + +static struct CommandLineOption gn_options[] = +{ + COMMAND_LINE_OPTION_HELP("GNUnet filesystem"), + COMMAND_LINE_OPTION_CFG_FILE(&cfgFilename), /* -c */ + COMMAND_LINE_OPTION_LOGGING, /* -L */ + { 'l', "logfile", "FILE", "set logfile name", 1, + &gnunet_getopt_configure_set_string, &cfgLogfile }, + { 'a', "anonymity", "LEVEL", + "set the desired LEVEL of sender-anonymity", 1, + &gnunet_getopt_configure_set_uint, &anonymity }, + COMMAND_LINE_OPTION_END, +}; + +int main(int argc, char **argv) +{ + int i; + struct ECRS_URI *uri; + + /* Parse gnunet options */ + i = GNUNET_init(argc, argv, "gnunet-fuse [OPTIONS] <URI> <PATH>", + &cfgFilename, gn_options, &ectx, &cfg); + if(i == -1) + { + goto quit; + } + + /* Set up log file */ + disk_directory_create_for_file(ectx, cfgLogfile); + ectx = GE_create_context_logfile(ectx, GE_ALL, cfgLogfile, YES, 0); + GE_setDefaultContext(ectx); + + if(i >= argc) + { + GE_LOG(ectx, GE_ERROR | GE_BULK | GE_USER, + "give me a URI to mount\n"); + goto quit; + } + uri = ECRS_stringToUri(ectx, argv[i]); + if(uri == NULL || !ECRS_isFileUri(uri)) + { + GE_LOG(ectx, GE_ERROR | GE_BULK | GE_USER, + "URI '%s' cannot be mounted\n", argv[i]); + goto quit; + } + gn_dirent_cache_init(); + root_de = gn_dirent_new(G_DIR_SEPARATOR_S, uri, DE_DIR); + ECRS_freeUri(uri); + root_mutex = MUTEX_CREATE(0); + argv[i] = argv[0]; + GE_LOG(ectx, GE_BULK | GE_USER | GE_DEBUG, "calling fuse_main\n"); + return fuse_main(argc - i, argv + i, &fops, NULL); +quit: + GNUNET_fini(ectx, cfg); + return -1; +} diff --git a/open.c b/open.c @@ -0,0 +1,30 @@ +#include <stdio.h> +#include <fuse.h> +#include <string.h> +#include <errno.h> +#include "gnfs.h" + +int gn_open(const char *path, struct fuse_file_info *fi) +{ + struct dirent *de; + + (void)fi; + GE_LOG(ectx, GE_BULK | GE_DEVELOPER | GE_DEBUG, "open for '%s'\n", + path); + de = gn_dirent_find(path); + if(de == NULL) + { + GE_LOG(ectx, GE_BULK | GE_DEVELOPER | GE_DEBUG, + "open: file not found\n"); + return -ENOENT; + } + if(de->de_type != DE_FILE) + { + GE_LOG(ectx, GE_BULK | GE_DEVELOPER | GE_DEBUG, + "open: not a file\n"); + gn_dirent_put(de); + return -ENOENT; + } + gn_dirent_put(de); + return 0; +} diff --git a/read.c b/read.c @@ -0,0 +1,95 @@ +#include <fuse.h> +#include <string.h> +#include <errno.h> +#include <unistd.h> +#include "gnfs.h" + +static void dpcb(unsigned long long totalBytes, + unsigned long long completedBytes, cron_t eta, + unsigned long long lastBlockOffset, const char *lastBlock, + unsigned int lastBlockSize, void *cls) +{ + (void)totalBytes; + (void)completedBytes; + (void)eta; + (void)lastBlockOffset; + (void)lastBlock; + (void)lastBlockSize; + (void)cls; +} + +static int tt(void *cls) +{ + (void)cls; + return OK; +} + +int gn_read(const char *path, char *buf, size_t size, off_t offset, + struct fuse_file_info *fi) +{ + gchar filename[] = "/tmp/gnfs_file.XXXXXX"; + struct dirent *de; + int ret, fd; + guint64 len; + + (void)fi; + + GE_LOG(ectx, GE_BULK | GE_DEVELOPER | GE_DEBUG, "read '%s' %d bytes\n", + path, size); + de = gn_dirent_find(path); + if(de == NULL) + { + GE_LOG(ectx, GE_BULK | GE_DEVELOPER | GE_DEBUG, + "read: file not found\n"); + return -ENOENT; + } + if(de->de_type != DE_FILE) + { + GE_LOG(ectx, GE_BULK | GE_DEVELOPER | GE_DEBUG, + "read: not a file\n"); + size = -ENOENT; + goto out; + } + len = ECRS_fileSize(de->de_uri); + if((guint64)offset >= len) + { + size = 0; + goto out; + } + if((guint64)offset + size > len) + { + size = len - offset; + } + fd = mkstemp(filename); + if(fd == -1) + { + GE_LOG_STRERROR_FILE(ectx, GE_BULK | GE_USER | GE_ERROR, + "mkstemp", filename); + size = -ENOBUFS; + goto out; + } + ret = ECRS_downloadFile(ectx, cfg, de->de_uri, filename, anonymity, + dpcb, NULL, tt, NULL); + if(ret != OK) + { + GE_LOG(ectx, GE_BULK | GE_USER | GE_ERROR, + "%s: failed to download directory\n", __FUNCTION__); + size = -ENODATA; + goto out_close_file; + } + offset = lseek(fd, offset, SEEK_SET); + if(offset == -1) + { + GE_LOG_STRERROR_FILE(ectx, GE_BULK | GE_USER | GE_ERROR, + "lseek", filename); + size = -ENODATA; + goto out_close_file; + } + size = read(fd, buf, size); +out_close_file: + unlink(filename); + close(fd); +out: + gn_dirent_put(de); + return size; +} diff --git a/readdir.c b/readdir.c @@ -0,0 +1,72 @@ +#define _LARGEFILE64_SOURCE +#include <sys/types.h> +#include <sys/mman.h> +#include <fcntl.h> +#include <unistd.h> +#include <string.h> +#include <errno.h> +#include <glib.h> +#include <fuse.h> +#include <GNUnet/gnunet_ecrs_lib.h> +#include "gnfs.h" + +struct readdir_callback_data +{ + fuse_fill_dir_t filler; + void *buf; +}; + +static int readdir_callback(struct dirent *de, const gchar *filename, + const ECRS_FileInfo *fi, const HashCode512 *key, int isRoot, void *data) +{ + struct readdir_callback_data *d = data; + + (void)de; + (void)fi; + (void)key; + + if(isRoot) + return OK; + + d->filler(d->buf, filename, NULL, 0); + return OK; +} + +int gn_readdir(const char *path, void *buf, fuse_fill_dir_t filler, + off_t offset, struct fuse_file_info *fi) +{ + struct dirent *de; + int ret = 0; + struct readdir_callback_data d; + + (void)offset; + (void)fi; + + GE_LOG(ectx, GE_BULK | GE_DEVELOPER | GE_DEBUG, "readdir for '%s'\n", + path); + de = gn_dirent_find(path); + if(de == NULL) + { + GE_LOG(ectx, GE_BULK | GE_DEVELOPER | GE_DEBUG, + "readdir: file not found\n"); + return -ENOENT; + } + if(de->de_type != DE_DIR) + { + GE_LOG(ectx, GE_BULK | GE_DEVELOPER | GE_DEBUG, + "readdir: not a directory\n"); + gn_dirent_put(de); + ret = -ENOENT; + goto out; + } + filler(buf, ".", NULL, 0); + filler(buf, "..", NULL, 0); + d.filler = filler; + d.buf = buf; + ret = gn_directory_for_each(de, readdir_callback, &d); + if(ret == -1) + ret = -ENOENT; +out: + gn_dirent_put(de); + return ret; +}