/**
* utime equivalent
*
* @param path the path to utime()ed
* @param buf struct utimbuf pointer holding new access and modification times
* @return(0 on success, -errno otherwise)
*/
int tagsistant_utime(const char *path, struct utimbuf *buf)
{
int res = 0, tagsistant_errno = 0;
char *utime_path = NULL;
TAGSISTANT_START(OPS_IN "UTIME on %s", path);
tagsistant_querytree *qtree = tagsistant_querytree_new(path, 0, 0, 1, 1);
// -- malformed --
if (QTREE_IS_MALFORMED(qtree)) TAGSISTANT_ABORT_OPERATION(ENOENT);
// -- object on disk --
if (QTREE_POINTS_TO_OBJECT(qtree)) utime_path = qtree->full_archive_path;
// -- tags --
// -- stats --
// -- relations --
else utime_path = tagsistant.archive;
// do the real utime()
// dbg(LOG_INFO, "utime(%s)", utime_path);
res = utime(utime_path, buf);
tagsistant_errno = errno;
TAGSISTANT_EXIT_OPERATION:
if ( res is -1 ) {
TAGSISTANT_STOP_ERROR(OPS_OUT "UTIME %s (%s): %d %d: %s", utime_path, tagsistant_querytree_type(qtree), res, tagsistant_errno, strerror(tagsistant_errno));
tagsistant_querytree_destroy(qtree, TAGSISTANT_ROLLBACK_TRANSACTION);
return (-tagsistant_errno);
} else {
TAGSISTANT_STOP_OK(OPS_OUT "UTIME %s (%s): OK", path, tagsistant_querytree_type(qtree));
tagsistant_querytree_destroy(qtree, TAGSISTANT_COMMIT_TRANSACTION);
return (0);
}
}
/**
* set extended attributes
*
* @param path the path
* @param stbuf pointer to struct stat buffer holding data about file
* @return(0 on success, -errno otherwise)
*/
int tagsistant_getxattr(const char *path, const char *name, char *value, size_t size)
{
int res = 0, tagsistant_errno = 0;
TAGSISTANT_START("SETXATTR on %s", path);
// build querytree
tagsistant_querytree *qtree = tagsistant_querytree_new(path, 0, 0, 1, 0);
// -- malformed --
if (QTREE_IS_MALFORMED(qtree))
TAGSISTANT_ABORT_OPERATION(ENOENT);
// -- error message --
if (qtree->error_message && g_regex_match_simple("@/error$", path, G_REGEX_EXTENDED, 0)) {
TAGSISTANT_ABORT_OPERATION(EFAULT);
}
// -- archive --
else if (QTREE_IS_ARCHIVE(qtree)) {
if (!g_regex_match_simple(TAGSISTANT_INODE_DELIMITER, qtree->object_path, 0, 0)) {
res = lgetxattr(qtree->object_path, name, value, size);
tagsistant_errno = errno;
} else if (qtree->full_archive_path) {
res = lgetxattr(qtree->full_archive_path, name, value, size);
tagsistant_errno = errno;
} else {
TAGSISTANT_ABORT_OPERATION(ENOENT);
}
}
// -- object on disk --
else if (QTREE_POINTS_TO_OBJECT(qtree)) {
if (qtree->full_archive_path) {
res = lgetxattr(qtree->full_archive_path, name, value, size);
tagsistant_errno = errno;
} else {
TAGSISTANT_ABORT_OPERATION(ENOENT);
}
}
// -- alias --
// -- relations --
// -- stats --
// -- store (incomplete) --
// -- tags --
// -- archive (the directory itself) --
// -- root --
else {
res = lgetxattr(tagsistant.repository, name, value, size);
tagsistant_errno = errno;
}
TAGSISTANT_EXIT_OPERATION:
if ( res == -1 ) {
TAGSISTANT_STOP_ERROR("GETXATTR on %s {%s}: %d %d: %s", path, tagsistant_querytree_type(qtree), res, tagsistant_errno, strerror(tagsistant_errno));
tagsistant_querytree_destroy(qtree, TAGSISTANT_ROLLBACK_TRANSACTION);
return (-tagsistant_errno);
} else {
TAGSISTANT_STOP_OK("GETXATTR on %s {%s}: OK", path, tagsistant_querytree_type(qtree));
tagsistant_querytree_destroy(qtree, TAGSISTANT_COMMIT_TRANSACTION);
return (res);
}
}
/**
* write() equivalent
*
* @param path the path of the file to be written
* @param buf buffer holding write() data
* @param size how many bytes should be written (size of *buf)
* @param offset starting of the write
* @param fi struct fuse_file_info used for open() flags
* @return(0 on success, -errno otherwise)
*/
int tagsistant_write(const char *path, const char *buf, size_t size, off_t offset, struct fuse_file_info *fi)
{
int res = 0, tagsistant_errno = 0, fh = 0;
TAGSISTANT_START("WRITE on %s [size: %lu offset: %lu]", path, (unsigned long) size, (long unsigned int) offset);
tagsistant_querytree *qtree = tagsistant_querytree_new(path, 0, 0, 1, 1);
// -- malformed --
if (QTREE_IS_MALFORMED(qtree))
TAGSISTANT_ABORT_OPERATION(ENOENT);
// -- alias --
if (QTREE_IS_ALIAS(qtree) && qtree->alias) {
res = size;
gchar *_buf = g_strndup(buf, size);
// end the string at the first carriage return or line feed character
gchar *path_ptr = rindex(_buf, '\n');
if (path_ptr) *path_ptr = '/';
path_ptr = rindex(_buf, '\r');
if (path_ptr) *path_ptr = '/';
// remove double slashes
GRegex *rx = g_regex_new("//", 0, 0, NULL);
gchar *_buf2 = g_regex_replace(rx, _buf, -1, 0, "/", 0, NULL);
g_regex_unref(rx);
g_free(_buf);
_buf = _buf2;
// get the size of the buffer
size_t max_size = MIN(size, TAGSISTANT_ALIAS_MAX_LENGTH - 1);
size_t real_size = MIN(max_size, strlen(_buf));
// copy the buffer to a temporary variable
gchar *value = g_strndup(_buf, real_size);
// save the buffer on disk
tagsistant_sql_alias_set(qtree->dbi, qtree->alias, value);
g_free(value);
g_free(_buf);
} else
// -- object on disk --
if (QTREE_POINTS_TO_OBJECT(qtree)) {
if (!qtree->full_archive_path) {
dbg('F', LOG_ERR, "Null qtree->full_archive_path");
TAGSISTANT_ABORT_OPERATION(EFAULT);
}
#if TAGSISTANT_ENABLE_FILE_HANDLE_CACHING
if (fi->fh) {
tagsistant_get_file_handle(fi, fh);
res = pwrite(fh, buf, size, offset);
tagsistant_errno = errno;
}
if ((-1 == res) || (0 == fh)) {
if (fh) close(fh);
fh = open(qtree->full_archive_path, fi->flags|O_WRONLY);
if (fh) res = pwrite(fh, buf, size, offset);
else res = -1;
tagsistant_errno = errno;
}
tagsistant_set_file_handle(fi, fh);
#else
fh = open(qtree->full_archive_path, fi->flags|O_WRONLY);
if (fh) {
res = pwrite(fh, buf, size, offset);
tagsistant_errno = errno;
close(fh);
} else {
TAGSISTANT_ABORT_OPERATION(errno);
}
#endif
}
// -- tags --
// -- stats --
// -- relations --
else TAGSISTANT_ABORT_OPERATION(EROFS);
// dbg('F', LOG_ERR, "Yeah!");
TAGSISTANT_EXIT_OPERATION:
if ( res == -1 ) {
TAGSISTANT_STOP_ERROR("WRITE %s (%s) (%s): %d %d: %s", path, qtree->full_archive_path, tagsistant_querytree_type(qtree), res, tagsistant_errno, strerror(tagsistant_errno));
tagsistant_querytree_destroy(qtree, TAGSISTANT_ROLLBACK_TRANSACTION);
return (-tagsistant_errno);
} else {
TAGSISTANT_STOP_OK("WRITE %s (%s): OK", path, tagsistant_querytree_type(qtree));
tagsistant_querytree_destroy(qtree, TAGSISTANT_COMMIT_TRANSACTION);
return (res);
}
}
/**
* link equivalent
*
* @param from existing file name
* @param to new file name
* @return(0 on success, -errno otherwise)
*/
int tagsistant_link(const char *from, const char *to)
{
int tagsistant_errno = 0, res = 0;
TAGSISTANT_START("LINK %s to %s", from, to);
/*
* guess if query points to an external or internal object
*/
char *_from = (char *) from;
if (!TAGSISTANT_PATH_IS_EXTERNAL(from)) {
_from = (char * ) from + strlen(tagsistant.mountpoint);
// dbg(LOG_INFO, "%s is internal to %s, trimmed to %s", from, tagsistant.mountpoint, _from);
}
tagsistant_querytree *from_qtree = tagsistant_querytree_new(_from, 0, 1, 0, 0);
tagsistant_querytree *to_qtree = tagsistant_querytree_new(to, 0, 0, 1, 0);
from_qtree->is_external = (from == _from) ? 1 : 0;
// -- malformed --
if (QTREE_IS_MALFORMED(from_qtree)) TAGSISTANT_ABORT_OPERATION(ENOENT);
if (QTREE_IS_MALFORMED(to_qtree)) TAGSISTANT_ABORT_OPERATION(ENOENT);
// -- object on disk --
if (QTREE_POINTS_TO_OBJECT(to_qtree) || (QTREE_IS_STORE(to_qtree) && QTREE_IS_COMPLETE(to_qtree))) {
// if object_path is null, borrow it from original path
if (strlen(to_qtree->object_path) == 0) {
dbg('F', LOG_INFO, "Getting object path from %s", from);
tagsistant_querytree_set_object_path(to_qtree, g_path_get_basename(from));
}
tagsistant_querytree_check_tagging_consistency(to_qtree);
// if qtree is taggable, do it
if (QTREE_IS_TAGGABLE(to_qtree)) {
dbg('F', LOG_INFO, "LINK : Creating %s", to_qtree->object_path);
res = tagsistant_force_create_and_tag_object(to_qtree, &tagsistant_errno);
if (-1 == res) goto TAGSISTANT_EXIT_OPERATION;
} else
// nothing to do about tags
{
dbg('F', LOG_ERR, "%s is not taggable!", to_qtree->full_path); // ??? why ??? should be taggable!!
}
// do the real link on disk
dbg('F', LOG_INFO, "Hard-linking %s to %s", from_qtree->full_archive_path, to_qtree->object_path);
res = link(from_qtree->full_archive_path, to_qtree->full_archive_path);
tagsistant_errno = errno;
}
// -- store (not complete) --
// -- tags --
// -- stats --
// -- relations --
// -- alias --
else TAGSISTANT_ABORT_OPERATION(EINVAL);
TAGSISTANT_EXIT_OPERATION:
if ( res == -1 ) {
TAGSISTANT_STOP_ERROR("LINK from %s to %s (%s) (%s): %d %d: %s", from, to, to_qtree->full_archive_path, tagsistant_querytree_type(to_qtree), res, tagsistant_errno, strerror(tagsistant_errno));
tagsistant_querytree_destroy(from_qtree, TAGSISTANT_ROLLBACK_TRANSACTION);
tagsistant_querytree_destroy(to_qtree, TAGSISTANT_ROLLBACK_TRANSACTION);
return (-tagsistant_errno);
} else {
TAGSISTANT_STOP_OK("LINK from %s to %s (%s): OK", from, to, tagsistant_querytree_type(to_qtree));
tagsistant_querytree_destroy(from_qtree, TAGSISTANT_COMMIT_TRANSACTION);
tagsistant_querytree_destroy(to_qtree, TAGSISTANT_COMMIT_TRANSACTION);
return (0);
}
}
/**
* open() equivalent
*
* @param path the path to be open()ed
* @param fi struct fuse_file_info holding open() flags
* @return(0 on success, -errno otherwise)
*/
int tagsistant_open(const char *path, struct fuse_file_info *fi)
{
int res = -1, tagsistant_errno = ENOENT;
TAGSISTANT_START("OPEN on %s", path);
// build querytree
tagsistant_querytree *qtree = tagsistant_querytree_new(path, 0, 0, 1, 0);
// -- malformed --
if (QTREE_IS_MALFORMED(qtree))
TAGSISTANT_ABORT_OPERATION(ENOENT);
// -- error message --
if (qtree->error_message && g_regex_match_simple("@/error$", path, G_REGEX_EXTENDED, 0)) {
res = 1;
tagsistant_errno = 0;
goto TAGSISTANT_EXIT_OPERATION;
}
// -- object --
else if (QTREE_POINTS_TO_OBJECT(qtree)) {
if (tagsistant_is_tags_list_file(qtree)) {
res = open(tagsistant.tags, fi->flags|O_RDONLY);
tagsistant_errno = errno;
goto TAGSISTANT_EXIT_OPERATION;
}
if (!qtree->full_archive_path) {
dbg('F', LOG_ERR, "Null qtree->full_archive_path");
TAGSISTANT_ABORT_OPERATION(EFAULT);
}
res = open(qtree->full_archive_path, fi->flags /*|O_RDONLY */);
tagsistant_errno = errno;
if (-1 != res) {
#if TAGSISTANT_ENABLE_FILE_HANDLE_CACHING
tagsistant_set_file_handle(fi, res);
dbg('F', LOG_INFO, "Caching %" PRIu64 " = open(%s)", fi->fh, path);
// fprintf(stderr, "Opened FD %lu\n", fi->fh);
#else
close(res);
#endif
tagsistant_querytree_check_tagging_consistency(qtree);
if (QTREE_IS_TAGGABLE(qtree)) {
if ((fi->flags & O_WRONLY) || (fi->flags & O_RDWR)) {
// invalidate the checksum
dbg('2', LOG_INFO, "Invalidating checksum on %s", path);
tagsistant_invalidate_object_checksum(qtree->inode, qtree->dbi);
} else {
fi->keep_cache = 1;
}
}
} else {
tagsistant_set_file_handle(fi, 0);
}
}
// -- stats --
else if (QTREE_IS_STATS(qtree)) {
res = open(tagsistant.tags, fi->flags|O_RDONLY);
tagsistant_set_file_handle(fi, res);
tagsistant_errno = errno;
fi->keep_cache = 0;
}
// -- alias --
else if (QTREE_IS_ALIAS(qtree) && qtree->alias) {
if (tagsistant_sql_alias_exists(qtree->dbi, qtree->alias)) {
res = 0;
tagsistant_errno = 0;
} else {
TAGSISTANT_ABORT_OPERATION(ENOENT);
}
}
// -- tags --
// -- relations --
else TAGSISTANT_ABORT_OPERATION(EROFS);
TAGSISTANT_EXIT_OPERATION:
if ( res == -1 ) {
TAGSISTANT_STOP_ERROR("OPEN on %s (%s) (%s): %d %d: %s", path, qtree->full_archive_path, tagsistant_querytree_type(qtree), res, tagsistant_errno, strerror(tagsistant_errno));
tagsistant_querytree_destroy(qtree, TAGSISTANT_ROLLBACK_TRANSACTION);
return (-tagsistant_errno);
} else {
TAGSISTANT_STOP_OK("OPEN on %s (%s): OK", path, tagsistant_querytree_type(qtree));
tagsistant_querytree_destroy(qtree, TAGSISTANT_COMMIT_TRANSACTION);
return (0);
}
}
/**
* mknod equivalent (used to create even regular files)
*
* @param path the path of the file (block, char, fifo) to be created
* @param mode file type and permissions
* @param rdev major and minor numbers, if applies
* @return(0 on success, -errno otherwise)
*/
int tagsistant_mknod(const char *path, mode_t mode, dev_t rdev)
{
int res = 0, tagsistant_errno = 0;
TAGSISTANT_START(OPS_IN "MKNOD on %s [mode: %u rdev: %u]", path, mode, (unsigned int) rdev);
// build querytree
tagsistant_querytree *qtree = tagsistant_querytree_new(path, 0, 1, 1, 0);
// -- malformed --
if (QTREE_IS_MALFORMED(qtree))
TAGSISTANT_ABORT_OPERATION(EFAULT);
// -- archive --
if (QTREE_IS_ARCHIVE(qtree))
TAGSISTANT_ABORT_OPERATION(EROFS);
// -- tags --
if (QTREE_POINTS_TO_OBJECT(qtree)) {
if (is_all_path(qtree->full_path)) TAGSISTANT_ABORT_OPERATION(EFAULT);
if (tagsistant_is_tags_list_file(qtree)) goto TAGSISTANT_EXIT_OPERATION;
tagsistant_querytree_check_tagging_consistency(qtree);
if (QTREE_IS_TAGGABLE(qtree)) {
res = tagsistant_force_create_and_tag_object(qtree, &tagsistant_errno);
}
if (qtree->inode) {
dbg('F', LOG_INFO, "NEW object on disk: mknod(%s) [inode: %d]", qtree->full_archive_path, qtree->inode);
res = mknod(qtree->full_archive_path, mode|S_IWUSR, rdev);
tagsistant_errno = errno;
// clean the RDS library
tagsistant_delete_rds_involved(qtree);
}
} else
// -- alias --
if (QTREE_IS_ALIAS(qtree)) {
tagsistant_sql_alias_create(qtree->dbi, qtree->alias);
}
// -- stats --
// -- relations --
else TAGSISTANT_ABORT_OPERATION(EROFS);
TAGSISTANT_EXIT_OPERATION:
if ( res is -1 ) {
TAGSISTANT_STOP_ERROR(OPS_OUT "MKNOD on %s (%s) (%s): %d %d: %s",
path, qtree->full_archive_path, tagsistant_querytree_type(qtree),
res, tagsistant_errno, strerror(tagsistant_errno));
tagsistant_querytree_destroy(qtree, TAGSISTANT_ROLLBACK_TRANSACTION);
return (-tagsistant_errno);
} else {
TAGSISTANT_STOP_OK(OPS_OUT "MKNOD on %s (%s): OK", path, tagsistant_querytree_type(qtree));
tagsistant_querytree_destroy(qtree, TAGSISTANT_COMMIT_TRANSACTION);
return (0);
}
}