int smb_lock_share_mode_entry(struct smbdb_ctx *db_ctx,
uint64_t dev,
uint64_t ino,
uint64_t extid)
{
struct locking_key lk;
return tdb_chainlock(db_ctx->smb_tdb, get_locking_key(&lk, dev, ino,
extid)) == 0 ? 0 : -1;
}
int smb_change_share_mode_entry(struct smbdb_ctx *db_ctx,
uint64_t dev,
uint64_t ino,
uint64_t extid,
const struct smb_share_mode_entry *set_entry,
const struct smb_share_mode_entry *new_entry)
{
TDB_DATA db_data;
struct locking_key lk;
TDB_DATA locking_key = get_locking_key(&lk, dev, ino, extid);
int num_share_modes = 0;
struct locking_data *ld = NULL; /* internal samba db state. */
struct share_mode_entry *shares = NULL;
size_t i;
int found_entry = 0;
db_data = tdb_fetch_compat(db_ctx->smb_tdb, locking_key);
if (!db_data.dptr) {
return -1; /* Error - missing entry ! */
}
ld = (struct locking_data *)db_data.dptr;
num_share_modes = ld->u.s.num_share_mode_entries;
shares = (struct share_mode_entry *)(db_data.dptr + sizeof(struct locking_data));
for (i = 0; i < num_share_modes; i++) {
struct share_mode_entry *share = &shares[i];
struct server_id pid = share->pid;
/* Check this process really exists. */
if (kill(sharemodes_procid_to_pid(&pid), 0) == -1 && (errno == ESRCH)) {
continue; /* No longer exists. */
}
if (share_mode_entry_equal(set_entry, share)) {
create_share_mode_entry(share, new_entry, share->name_hash);
found_entry = 1;
break;
}
}
if (!found_entry) {
free(db_data.dptr);
return -1;
}
/* Save modified data. */
if (tdb_store(db_ctx->smb_tdb, locking_key, db_data, TDB_REPLACE) != 0) {
free(db_data.dptr);
return -1;
}
free(db_data.dptr);
return 0;
}
int smb_delete_share_mode_entry(struct smbdb_ctx *db_ctx,
uint64_t dev,
uint64_t ino,
uint64_t extid,
const struct smb_share_mode_entry *del_entry)
{
TDB_DATA db_data;
struct locking_key lk;
TDB_DATA locking_key = get_locking_key(&lk, dev, ino, extid);
int orig_num_share_modes = 0;
struct locking_data *ld = NULL; /* internal samba db state. */
struct share_mode_entry *shares = NULL;
uint8 *new_data_p = NULL;
size_t remaining_size = 0;
size_t i, num_share_modes;
const uint8 *remaining_ptr = NULL;
db_data = tdb_fetch_compat(db_ctx->smb_tdb, locking_key);
if (!db_data.dptr) {
return -1; /* Error - missing entry ! */
}
ld = (struct locking_data *)db_data.dptr;
orig_num_share_modes = ld->u.s.num_share_mode_entries;
shares = (struct share_mode_entry *)(db_data.dptr + sizeof(struct locking_data));
if (orig_num_share_modes == 1) {
/* Only one entry - better be ours... */
if (!share_mode_entry_equal(del_entry, shares)) {
/* Error ! We can't delete someone else's entry ! */
free(db_data.dptr);
return -1;
}
/* It's ours - just remove the entire record. */
free(db_data.dptr);
return tdb_delete(db_ctx->smb_tdb, locking_key) ? -1 : 0;
}
/* More than one - allocate a new record minus the one we'll delete. */
new_data_p = (uint8 *)malloc(
db_data.dsize - sizeof(struct share_mode_entry));
if (!new_data_p) {
free(db_data.dptr);
return -1;
}
/* Copy the header. */
memcpy(new_data_p, db_data.dptr, sizeof(struct locking_data));
num_share_modes = 0;
for (i = 0; i < orig_num_share_modes; i++) {
struct share_mode_entry *share = &shares[i];
struct server_id pid = share->pid;
/* Check this process really exists. */
if (kill(sharemodes_procid_to_pid(&pid), 0) == -1 && (errno == ESRCH)) {
continue; /* No longer exists. */
}
if (share_mode_entry_equal(del_entry, share)) {
continue; /* This is our delete taget. */
}
memcpy(new_data_p + sizeof(struct locking_data) +
(num_share_modes * sizeof(struct share_mode_entry)),
share, sizeof(struct share_mode_entry) );
num_share_modes++;
}
if (num_share_modes == 0) {
/* None left after pruning. Delete record. */
free(db_data.dptr);
free(new_data_p);
return tdb_delete(db_ctx->smb_tdb, locking_key) ? -1 : 0;
}
/* Copy any delete tokens plus the terminating filenames. */
remaining_ptr = db_data.dptr + sizeof(struct locking_data) + (orig_num_share_modes * sizeof(struct share_mode_entry));
remaining_size = db_data.dsize - (remaining_ptr - db_data.dptr);
memcpy(new_data_p + sizeof(struct locking_data) + (num_share_modes * sizeof(struct share_mode_entry)),
remaining_ptr,
remaining_size);
free(db_data.dptr);
db_data.dptr = new_data_p;
/* Re-save smaller record. */
ld = (struct locking_data *)db_data.dptr;
ld->u.s.num_share_mode_entries = num_share_modes;
db_data.dsize = sizeof(struct locking_data) + (num_share_modes * sizeof(struct share_mode_entry)) + remaining_size;
if (tdb_store(db_ctx->smb_tdb, locking_key, db_data, TDB_REPLACE) != 0) {
free(db_data.dptr);
return -1;
}
free(db_data.dptr);
return 0;
}
int smb_create_share_mode_entry_ex(struct smbdb_ctx *db_ctx,
uint64_t dev,
uint64_t ino,
uint64_t extid,
const struct smb_share_mode_entry *new_entry,
const char *sharepath, /* Must be absolute utf8 path. */
const char *filename) /* Must be relative utf8 path. */
{
TDB_DATA db_data;
struct locking_key lk;
TDB_DATA locking_key = get_locking_key(&lk, dev, ino, extid);
int orig_num_share_modes = 0;
struct locking_data *ld = NULL; /* internal samba db state. */
struct share_mode_entry *shares = NULL;
uint8 *new_data_p = NULL;
size_t new_data_size = 0;
int err = 0;
uint32_t name_hash = smb_name_hash(sharepath, filename, &err);
if (err) {
return -1;
}
db_data = tdb_fetch_compat(db_ctx->smb_tdb, locking_key);
if (!db_data.dptr) {
/* We must create the entry. */
db_data.dptr = (uint8 *)malloc(
sizeof(struct locking_data) +
sizeof(struct share_mode_entry) +
strlen(sharepath) + 1 +
strlen(filename) + 1);
if (!db_data.dptr) {
return -1;
}
ld = (struct locking_data *)db_data.dptr;
memset(ld, '\0', sizeof(struct locking_data));
ld->u.s.num_share_mode_entries = 1;
ld->u.s.num_delete_token_entries = 0;
shares = (struct share_mode_entry *)(db_data.dptr + sizeof(struct locking_data));
create_share_mode_entry(shares, new_entry, name_hash);
memcpy(db_data.dptr + sizeof(struct locking_data) + sizeof(struct share_mode_entry),
sharepath,
strlen(sharepath) + 1);
memcpy(db_data.dptr + sizeof(struct locking_data) + sizeof(struct share_mode_entry) +
strlen(sharepath) + 1,
filename,
strlen(filename) + 1);
db_data.dsize = sizeof(struct locking_data) + sizeof(struct share_mode_entry) +
strlen(sharepath) + 1 +
strlen(filename) + 1;
if (tdb_store(db_ctx->smb_tdb, locking_key, db_data, TDB_INSERT) != 0) {
free(db_data.dptr);
return -1;
}
free(db_data.dptr);
return 0;
}
/* Entry exists, we must add a new entry. */
new_data_p = (uint8 *)malloc(
db_data.dsize + sizeof(struct share_mode_entry));
if (!new_data_p) {
free(db_data.dptr);
return -1;
}
ld = (struct locking_data *)db_data.dptr;
orig_num_share_modes = ld->u.s.num_share_mode_entries;
/* Copy the original data. */
memcpy(new_data_p, db_data.dptr, sizeof(struct locking_data) + (orig_num_share_modes * sizeof(struct share_mode_entry)));
/* Add in the new share mode */
shares = (struct share_mode_entry *)(new_data_p + sizeof(struct locking_data) +
(orig_num_share_modes * sizeof(struct share_mode_entry)));
create_share_mode_entry(shares, new_entry, name_hash);
ld = (struct locking_data *)new_data_p;
ld->u.s.num_share_mode_entries++;
/* Append the original delete_tokens and filenames. */
memcpy(new_data_p + sizeof(struct locking_data) + (ld->u.s.num_share_mode_entries * sizeof(struct share_mode_entry)),
db_data.dptr + sizeof(struct locking_data) + (orig_num_share_modes * sizeof(struct share_mode_entry)),
db_data.dsize - sizeof(struct locking_data) - (orig_num_share_modes * sizeof(struct share_mode_entry)));
new_data_size = db_data.dsize + sizeof(struct share_mode_entry);
free(db_data.dptr);
db_data.dptr = new_data_p;
db_data.dsize = new_data_size;
if (tdb_store(db_ctx->smb_tdb, locking_key, db_data, TDB_REPLACE) != 0) {
free(db_data.dptr);
return -1;
}
free(db_data.dptr);
return 0;
}
int smb_get_share_mode_entries(struct smbdb_ctx *db_ctx,
uint64_t dev,
uint64_t ino,
uint64_t extid,
struct smb_share_mode_entry **pp_list,
unsigned char *p_delete_on_close)
{
struct locking_key lk;
TDB_DATA db_data;
struct smb_share_mode_entry *list = NULL;
int num_share_modes = 0;
struct locking_data *ld = NULL; /* internal samba db state. */
struct share_mode_entry *shares = NULL;
size_t i;
int list_num;
*pp_list = NULL;
*p_delete_on_close = 0;
db_data = tdb_fetch_compat(db_ctx->smb_tdb,
get_locking_key(&lk, dev, ino, extid));
if (!db_data.dptr) {
return 0;
}
ld = (struct locking_data *)db_data.dptr;
num_share_modes = ld->u.s.num_share_mode_entries;
if (!num_share_modes) {
free(db_data.dptr);
return 0;
}
list = (struct smb_share_mode_entry *)malloc(sizeof(struct smb_share_mode_entry)*num_share_modes);
if (!list) {
free(db_data.dptr);
return -1;
}
memset(list, '\0', num_share_modes * sizeof(struct smb_share_mode_entry));
shares = (struct share_mode_entry *)(db_data.dptr + sizeof(struct locking_data));
list_num = 0;
for (i = 0; i < num_share_modes; i++) {
struct share_mode_entry *share = &shares[i];
struct smb_share_mode_entry *sme = &list[list_num];
struct server_id pid = share->pid;
/* Check this process really exists. */
if (kill(sharemodes_procid_to_pid(&pid), 0) == -1 && (errno == ESRCH)) {
continue; /* No longer exists. */
}
/* Ignore deferred open entries. */
if (share->op_type == DEFERRED_OPEN_ENTRY) {
continue;
}
/* Copy into the external list. */
sme->dev = share->id.devid;
sme->ino = share->id.inode;
sme->extid = share->id.extid;
sme->share_access = (uint32_t)share->share_access;
sme->access_mask = (uint32_t)share->access_mask;
sme->open_time.tv_sec = share->time.tv_sec;
sme->open_time.tv_usec = share->time.tv_usec;
sme->file_id = (uint32_t)share->share_file_id;
sme->pid = share->pid;
list_num++;
}
if (list_num == 0) {
free(db_data.dptr);
free(list);
return 0;
}
*p_delete_on_close = ld->u.s.num_delete_token_entries != 0;
*pp_list = list;
free(db_data.dptr);
return list_num;
}
int smb_unlock_share_mode_entry(struct smbdb_ctx *db_ctx,
uint64_t dev,
uint64_t ino)
{
return tdb_chainunlock(db_ctx->smb_tdb, get_locking_key(dev, ino));
}