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*/
#ifndef APPFS_CACHEDIR
#define APPFS_CACHEDIR "/var/cache/appfs"
#endif
/* Debugging macros */
#ifdef DEBUG
int appfs_debug_fd = STDERR_FILENO;
#define APPFS_DEBUG(x...) { fprintf(stderr, "[debug] %s:%i:%s: ", __FILE__, __LINE__, __func__); fprintf(stderr, x); fprintf(stderr, "\n"); }
#define APPFS_DEBUG(x...) { \
char buf[8192]; \
int bufoff = 0; \
if (appfs_debug_fd == -1) { \
appfs_debug_fd = open("/tmp/appfsd.log", O_WRONLY | O_APPEND | O_CREAT, 0600); \
}; \
bufoff = snprintf(buf, sizeof(buf), "[debug] [t=%llx] %s:%i:%s: ", (unsigned long long) pthread_self(), __FILE__, __LINE__, __func__); \
if (bufoff < sizeof(buf)) { \
bufoff += snprintf(buf + bufoff, sizeof(buf) - bufoff, x); \
}; \
if (bufoff < sizeof(buf)) { \
bufoff += snprintf(buf + bufoff, sizeof(buf) - bufoff, "\n");\
} \
if (bufoff > sizeof(buf)) { \
bufoff = sizeof(buf); \
}; \
write(appfs_debug_fd, buf, bufoff); \
}
#else
#define APPFS_DEBUG(x...) /**/
#endif
/*
* SHA1 Tcl Package initializer, from sha1.o
*/
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/*
* Handle unthreaded Tcl
*/
pthread_mutex_t appfs_tcl_big_global_lock = PTHREAD_MUTEX_INITIALIZER;
#define appfs_call_libtcl_enter pthread_mutex_lock(&appfs_tcl_big_global_lock);
#define appfs_call_libtcl_exit pthread_mutex_unlock(&appfs_tcl_big_global_lock);
#else
#warning Using a Threaded Tcl interpreter may cause memory leaks
#define appfs_call_libtcl_enter /**/
#define appfs_call_libtcl_exit /**/
#endif
#define appfs_call_libtcl(x...) appfs_call_libtcl_enter x appfs_call_libtcl_exit
/*
* Global variables for AppFS Tcl Interpreter restarting
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thread_interp_reset_key = global_interp_reset_key;
if (interp == NULL) {
interp = appfs_create_TclInterp(NULL);
if (interp == NULL) {
APPFS_DEBUG("Create interp failed, returningin failure.");
return(NULL);
}
pthread_ret = pthread_setspecific(interpKey, interp);
if (pthread_ret != 0) {
APPFS_DEBUG("pthread_setspecific() failed. Terminating Tcl interpreter.");
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Tcl_Obj **objv;
const char *arg;
va_list argp;
int retval;
int i;
if (interp == NULL) {
APPFS_DEBUG("Invalid interpreter passed in, returning in failure.");
return(TCL_ERROR);
}
objv = (void *) ckalloc(sizeof(*objv) * objc);
appfs_call_libtcl(
objv[0] = Tcl_NewStringObj(cmd, -1);
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return(getuid());
}
ctx = fuse_get_context();
if (ctx == NULL) {
/* Unable to lookup user for some reason */
/* Return an unprivileged user ID */
APPFS_DEBUG("Unable to lookup user for some reason, returninng user ID of 1");
return(1);
}
return(ctx->uid);
}
/*
|
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return(getgid());
}
ctx = fuse_get_context();
if (ctx == NULL) {
/* Unable to lookup user for some reason */
/* Return an unprivileged user ID */
APPFS_DEBUG("Unable to lookup group for some reason, returninng group ID of 1");
return(1);
}
return(ctx->gid);
}
static void appfs_simulate_user_fs_enter(void) {
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pthread_ret = pthread_mutex_unlock(&appfs_path_info_cache_mutex);
if (pthread_ret != 0) {
APPFS_DEBUG("Unable to unlock path_info cache mutex !");
return;
}
return;
}
static void appfs_get_path_info_cache_rm(const char *path, uid_t uid) {
unsigned int hash_idx;
int pthread_ret;
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retval = 0;
fsuid = appfs_get_fsuid();
cache_ret = appfs_get_path_info_cache_get(path, fsuid, pathinfo);
if (cache_ret == 0) {
if (pathinfo->type == APPFS_PATHTYPE_DOES_NOT_EXIST) {
APPFS_DEBUG("Returning from cache: does not exist \"%s\"", path);
return(-ENOENT);
}
if (pathinfo->type == APPFS_PATHTYPE_INVALID) {
APPFS_DEBUG("Returning from cache: invalid object \"%s\"", path);
return(-EIO);
}
return(0);
}
interp = appfs_TclInterp();
if (interp == NULL) {
APPFS_DEBUG("error: Unable to get an interpreter");
return(-EIO);
}
appfs_call_libtcl(Tcl_Preserve(interp);)
tcl_ret = appfs_Tcl_Eval(interp, 2, "::appfs::getattr", path);
if (tcl_ret != TCL_OK) {
|
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appfs_call_libtcl(Tcl_Release(interp);)
return(-EIO);
}
if (attr_value == NULL) {
APPFS_DEBUG("error: Unable to get type for \"%s\" from Tcl", path);
appfs_call_libtcl(Tcl_Release(interp);)
return(-EIO);
}
pathinfo->packaged = 0;
pathinfo->inode = appfs_get_path_inode(path);
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}
Tcl_Release(interp);
)
if (retval == 0) {
appfs_get_path_info_cache_add(path, fsuid, pathinfo);
} else {
APPFS_DEBUG("error: Invalid type for \"%s\" from Tcl", path);
}
return(retval);
}
static char *appfs_prepare_to_create(const char *path) {
Tcl_Interp *interp;
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}
#endif
pathinfo.type = APPFS_PATHTYPE_INVALID;
retval = appfs_get_path_info(path, &pathinfo);
if (retval != 0) {
if (retval == -ENOENT) {
APPFS_DEBUG("get_path_info returned ENOENT, returning it as well.");
} else {
APPFS_DEBUG("error: get_path_info failed");
}
return(retval);
}
memset(stbuf, 0, sizeof(struct stat));
stbuf->st_mtime = pathinfo.time;
stbuf->st_ctime = pathinfo.time;
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int children_count, idx;
int tcl_ret;
APPFS_DEBUG("Enter (path = %s, ...)", path);
interp = appfs_TclInterp();
if (interp == NULL) {
APPFS_DEBUG("error: Unable to get an interpreter");
return(0);
}
appfs_call_libtcl(Tcl_Preserve(interp);)
filler(buf, ".", NULL, 0);
filler(buf, "..", NULL, 0);
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APPFS_DEBUG("Enter (path = %s, ...)", path);
gpi_ret = appfs_get_path_info(path, &pathinfo);
if ((fi->flags & (O_WRONLY|O_CREAT)) == (O_CREAT|O_WRONLY)) {
/* The file will be created if it does not exist */
if (gpi_ret != 0 && gpi_ret != -ENOENT) {
APPFS_DEBUG("error: get_path_info failed");
return(gpi_ret);
}
mode = "create";
/*
* We have to clear the cache here so that the number of
* links gets maintained on the parent directory
*/
appfs_get_path_info_cache_flush(appfs_get_fsuid(), -1);
} else {
/* The file must already exist */
if (gpi_ret != 0) {
APPFS_DEBUG("error: get_path_info failed");
return(gpi_ret);
}
mode = "";
if ((fi->flags & O_WRONLY) == O_WRONLY) {
mode = "write";
}
}
if (pathinfo.type == APPFS_PATHTYPE_DIRECTORY) {
APPFS_DEBUG("error: Asked to open a directory.");
return(-EISDIR);
}
interp = appfs_TclInterp();
if (interp == NULL) {
APPFS_DEBUG("error: Unable to get an interpreter");
return(-EIO);
}
appfs_call_libtcl(Tcl_Preserve(interp);)
tcl_ret = appfs_Tcl_Eval(interp, 3, "::appfs::openpath", path, mode);
if (tcl_ret != TCL_OK) {
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|
+
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|
appfs_call_libtcl(
real_path = Tcl_GetStringResult(interp);
)
appfs_call_libtcl(Tcl_Release(interp);)
if (real_path == NULL) {
APPFS_DEBUG("error: real_path was NULL.")
return(-EIO);
}
APPFS_DEBUG("Translated request to open %s to opening %s (mode = \"%s\")", path, real_path, mode);
fh = open(real_path, fi->flags, 0600);
if (fh < 0) {
APPFS_DEBUG("error: open failed");
return(-EIO);
return(errno * -1);
}
fi->fh = fh;
return(0);
}
static int appfs_fuse_close(const char *path, struct fuse_file_info *fi) {
int close_ret;
appfs_get_path_info_cache_rm(path, appfs_get_fsuid());
close_ret = close(fi->fh);
if (close_ret != 0) {
APPFS_DEBUG("error: close failed");
return(-EIO);
return(errno * -1);
}
return(0);
}
static int appfs_fuse_read(const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi) {
off_t lseek_ret;
APPFS_DEBUG("Enter (path = %s, ...)", path);
APPFS_DEBUG("Enter (path = %s, buf, %lli, %lli, fd=%lli)", path, (long long) size, (long long) offset, (long long) fi->fh);
retval = 0;
lseek_ret = lseek(fi->fh, offset, SEEK_SET);
if (lseek_ret != offset) {
return(-EIO);
}
read_ret = read(fi->fh, buf, size);
return(read_ret);
if (read_ret == 0) {
break;
}
size -= read_ret;
buf += read_ret;
offset += read_ret;
retval += read_ret;
}
if (size != 0) {
APPFS_DEBUG("error: incomplete read (this is an error because FUSE will request the exact length of the file)");
return(0);
}
APPFS_DEBUG("Returning: %i", retval);
return(retval);
}
static int appfs_fuse_write(const char *path, const char *buf, size_t size, off_t offset, struct fuse_file_info *fi) {
off_t lseek_ret;
lseek_ret = lseek(fi->fh, offset, SEEK_SET);
if (lseek_ret != offset) {
return(-EIO);
}
write_ret = write(fi->fh, buf, size);
return(write_ret);
if (write_ret == 0) {
break;
}
size -= write_ret;
buf += write_ret;
offset += write_ret;
retval += write_ret;
}
if (size != 0) {
APPFS_DEBUG("error: incomplete write");
}
return(retval);
}
static int appfs_fuse_mknod(const char *path, mode_t mode, dev_t device) {
char *real_path;
int mknod_ret;
APPFS_DEBUG("Enter (path = %s, ...)", path);
|
| ︙ | | |
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|
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+
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|
return;
}
/*
* Terminate a thread
*/
static void appfs_terminate_interp(void *_interp) {
static void appfs_terminate_interp_and_thread(void *_interp) {
Tcl_Interp *interp;
APPFS_DEBUG("Called: _interp = %p", _interp);
if (_interp == NULL) {
APPFS_DEBUG("Terminating thread with no interpreter");
return;
}
interp = _interp;
APPFS_DEBUG("Terminating interpreter due to thread termination");
appfs_call_libtcl(
Tcl_DeleteInterp(interp);
)
Tcl_FinalizeThread();
return;
}
/*
* FUSE operations structure
*/
|
| ︙ | | |
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-
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|
Tcl_StaticPackage(NULL, "appfsd", Appfsd_Init, NULL);
/*
* Create a thread-specific-data (TSD) key for each thread to refer
* to its own Tcl interpreter. Tcl interpreters must be unique per
* thread and new threads are dynamically created by FUSE.
*/
pthread_ret = pthread_key_create(&interpKey, appfs_terminate_interp);
pthread_ret = pthread_key_create(&interpKey, appfs_terminate_interp_and_thread);
if (pthread_ret != 0) {
fprintf(stderr, "Unable to create TSD key for Tcl. Aborting.\n");
return(1);
}
/*
|
| ︙ | | |