static int phoenixfs_getattr(const char *path, struct stat *stbuf)
{
struct file_record *fr;
struct dir_record *dr;
int rev;
rev = parse_pathspec(xpath, path);
build_xpath(openpath, xpath, rev);
PHOENIXFS_DBG("getattr:: %s %d", openpath, rev);
/* Try underlying FS */
if (lstat(openpath, stbuf) < 0) {
/* Try fstree */
if (!(dr = find_dr(xpath))) {
if (!(fr = find_fr(xpath, rev)))
return -ENOENT;
else {
memset(stbuf, 0, sizeof(struct stat));
fill_stat(stbuf, fr);
return 0;
}
}
memset(stbuf, 0, sizeof(struct stat));
stbuf->st_mode = S_IFDIR | 0755;
}
return 0;
}
void fstree_remove_file(const char *path)
{
struct dir_record *dr;
struct vfile_record *vfr;
uint16_t key = ~0;
size_t length;
char *filename;
int rev;
filename = split_basename(path, dirname);
length = (size_t) strlen((char *) filename);
key = compute_crc32(key, (const unsigned char *) filename, length);
if (!(dr = find_dr(dirname))) {
PHOENIXFS_DBG("fstree_remove_file:: missing %s", dirname);
return;
}
if (!(vfr = find(dr->vroot, key, 0))) {
PHOENIXFS_DBG("fstree_remove_file:: missing %s", filename);
return;
}
for (rev = 0; ; rev++) {
if (!vfr->history[rev])
break;
free(vfr->history[rev]);
}
PHOENIXFS_DBG("fstree_remove_file:: %s", path);
delete(dr->vroot, key);
}
static int phoenixfs_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
off_t offset, struct fuse_file_info *fi)
{
DIR *dp;
struct dirent *de;
struct stat st;
void *record;
struct node *iter_root, *iter;
struct vfile_record *vfr;
struct dir_record *dr;
register int i;
dp = (DIR *) (uintptr_t) fi->fh;
if (!(de = readdir(dp)))
return -errno;
/* Fill directories from backing FS */
do {
/* Hide the .git directory, and enumerate only directories */
if (strcmp(de->d_name, ".git") && de->d_type == DT_DIR) {
PHOENIXFS_DBG("readdir:: fs: %s", de->d_name);
if (filler(buf, de->d_name, NULL, 0))
return -ENOMEM;
}
} while ((de = readdir(dp)) != NULL);
/* Fill files from fstree */
if (!(dr = find_dr(path)) || !dr->vroot) {
PHOENIXFS_DBG("readdir:: fstree: blank");
return 0;
}
iter_root = dr->vroot;
iter = dr->vroot;
/* Use only the leaves */
while (!iter->is_leaf)
iter = iter->pointers[0];
while (1) {
for (i = 0; i < iter->num_keys; i++) {
if (!(record = find(iter_root, iter->keys[i], 0)))
PHOENIXFS_DBG("readdir:: key listing issue");
vfr = (struct vfile_record *) record;
fill_stat(&st, vfr->history[vfr->HEAD]);
PHOENIXFS_DBG("readdir:: tree fill: %s", (const char *) vfr->name);
if (filler(buf, (const char *) vfr->name, &st, 0))
return -ENOMEM;
}
if (iter->pointers && iter->pointers[BTREE_ORDER - 1] != NULL)
iter = iter->pointers[BTREE_ORDER - 1];
else
break;
}
return 0;
}
void fstree_insert_update_file(const char *path, const char *follow)
{
struct dir_record *dr;
struct vfile_record *vfr;
struct file_record *fr, *new_fr;
uint16_t key = ~0;
char *filename;
size_t length;
filename = split_basename(path, dirname);
if (!(dr = find_dr(dirname)))
goto DR;
else {
length = (size_t) strlen((char *) filename);
key = compute_crc32(key, (const unsigned char *) filename, length);
if (!(vfr = find(dr->vroot, key, 0))) {
PHOENIXFS_DBG("fstree_insert_update_file:: missing vfr: %s", filename);
goto VFR;
}
else {
if (vfr->HEAD >= 0)
fr = vfr->history[vfr->HEAD];
else
fr = NULL;
goto FR;
}
}
DR:
dr = make_dr(dirname);
insert_dr(dr);
VFR:
vfr = make_vfr(filename);
insert_vfr(dr, vfr);
FR:
if (!(new_fr = make_fr(path, follow))) {
PHOENIXFS_DBG("fstree_insert_update_file:: Can't make fr %s", path);
return;
}
/* If content is present in the old fr, don't make a new fr */
if (fr && !memcmp(fr->sha1, new_fr->sha1, 20)) {
PHOENIXFS_DBG("fstree_insert_update_file:: unmodified: %s", path);
free(new_fr);
return;
}
insert_fr(vfr, new_fr);
}
struct vfile_record *find_vfr(const char *path)
{
uint16_t key = ~0;
struct dir_record *dr;
struct vfile_record *vfr;
char *filename;
size_t length;
filename = split_basename(path, dirname);
if (!(dr = find_dr(dirname)) || !dr->vroot) {
PHOENIXFS_DBG("find_vfr:: not found %s", path);
return NULL;
}
length = (size_t) strlen((char *) filename);
key = compute_crc32(key, (const unsigned char *) filename, length);
if (!(vfr = find(dr->vroot, key, 0))) {
PHOENIXFS_DBG("find_vfr:: not found %s", path);
return NULL;
}
PHOENIXFS_DBG("find_vfr:: found %s", path);
return vfr;
}
static int phoenixfs_opendir(const char *path, struct fuse_file_info *fi)
{
struct dir_record *dr;
DIR *dp;
PHOENIXFS_DBG("opendir:: %s", path);
build_xpath(xpath, path, 0);
/* Try underlying fs */
if (!(dp = opendir(xpath))) {
/* Try fstree */
if (!(dr = find_dr(path)))
return -ENOENT;
else {
/* Make the directory and open it */
mkdir(xpath, S_IRUSR | S_IWUSR | S_IXUSR);
dp = opendir(xpath);
}
}
fi->fh = (intptr_t) dp;
return 0;
}
static int phoenixfs_rename(const char *path, const char *newpath)
{
char xnewpath[PATH_MAX];
struct dir_record *dr;
struct vfile_record *vfr, *new_vfr;
char *filename, *newfilename;
uint16_t key = ~0;
size_t length;
uint8_t start_rev, rev_nr;
PHOENIXFS_DBG("rename:: %s to %s", path, newpath);
build_xpath(xpath, path, 0);
build_xpath(xnewpath, newpath, 0);
if (rename(xpath, xnewpath) < 0)
return -errno;
/* Update fstree */
filename = split_basename(path, xpath);
if (!(dr = find_dr(xpath))) {
PHOENIXFS_DBG("rename:: Missing dr for %s", xpath);
return 0;
}
/* Find the old vfr to copy out data from and remove */
length = (size_t) strlen((char *) filename);
key = compute_crc32(key, (const unsigned char *) filename, length);
if (!(vfr = find(dr->vroot, key, 0))) {
PHOENIXFS_DBG("rename:: Missing vfr for %s", path);
return 0;
}
/* Make a new vfr and copy out history from old vfr */
newfilename = split_basename(path, NULL);
new_vfr = make_vfr(newfilename);
/* Compute start_rev and rev_nr */
if (vfr->HEAD < 0) {
start_rev = 0;
rev_nr = 0;
} else if (vfr->history[(vfr->HEAD + 1) % REV_TRUNCATE]) {
/* History is full, and is probably wrapping around */
start_rev = (vfr->HEAD + 1) % REV_TRUNCATE;
rev_nr = 20;
} else {
/* History is not completely filled */
start_rev = 0;
rev_nr = vfr->HEAD + 1;
}
PHOENIXFS_DBG("rename:: copying %d revisions", rev_nr);
while (start_rev < rev_nr) {
new_vfr->history[start_rev] = vfr->history[start_rev];
start_rev = (start_rev + 1) % REV_TRUNCATE;
}
new_vfr->HEAD = rev_nr - 1;
insert_vfr(dr, new_vfr);
/* Remove old vfr */
dr->vroot = remove_entry(dr->vroot, key);
return 0;
}
