Locking functions
Copyright (C) Andrew Tridgell 1992-2000
Copyright (C) Jeremy Allison 1992-2000
+ Copyright (C) Volker Lendecke 2005
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
#include "includes.h"
uint16 global_smbpid;
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_LOCKING
+
/* the locking database handle */
static TDB_CONTEXT *tdb;
/****************************************************************************
Utility function called to see if a file region is locked.
- If check_self is True, then checks on our own fd with the same locking context
- are still made. If check_self is False, then checks are not made on our own fd
- with the same locking context are not made.
****************************************************************************/
BOOL is_locked(files_struct *fsp,connection_struct *conn,
SMB_BIG_UINT count,SMB_BIG_UINT offset,
- enum brl_type lock_type, BOOL check_self)
+ enum brl_type lock_type)
{
int snum = SNUM(conn);
+ int strict_locking = lp_strict_locking(snum);
BOOL ret;
if (count == 0)
return(False);
- if (!lp_locking(snum) || !lp_strict_locking(snum))
+ if (!lp_locking(snum) || !strict_locking)
return(False);
- ret = !brl_locktest(fsp->dev, fsp->inode, fsp->fnum,
- global_smbpid, sys_getpid(), conn->cnum,
- offset, count, lock_type, check_self);
+ if (strict_locking == Auto) {
+ if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type) && (lock_type == READ_LOCK || lock_type == WRITE_LOCK)) {
+ DEBUG(10,("is_locked: optimisation - exclusive oplock on file %s\n", fsp->fsp_name ));
+ ret = 0;
+ } else if ((fsp->oplock_type == LEVEL_II_OPLOCK) &&
+ (lock_type == READ_LOCK)) {
+ DEBUG(10,("is_locked: optimisation - level II oplock on file %s\n", fsp->fsp_name ));
+ ret = 0;
+ } else {
+ ret = !brl_locktest(fsp->dev, fsp->inode, fsp->fnum,
+ global_smbpid, procid_self(), conn->cnum,
+ offset, count, lock_type);
+ }
+ } else {
+ ret = !brl_locktest(fsp->dev, fsp->inode, fsp->fnum,
+ global_smbpid, procid_self(), conn->cnum,
+ offset, count, lock_type);
+ }
DEBUG(10,("is_locked: brl start=%.0f len=%.0f %s for file %s\n",
(double)offset, (double)count, ret ? "locked" : "unlocked",
****************************************************************************/
static NTSTATUS do_lock(files_struct *fsp,connection_struct *conn, uint16 lock_pid,
- SMB_BIG_UINT count,SMB_BIG_UINT offset,enum brl_type lock_type)
+ SMB_BIG_UINT count,SMB_BIG_UINT offset,enum brl_type lock_type, BOOL *my_lock_ctx)
{
- NTSTATUS status;
+ NTSTATUS status = NT_STATUS_LOCK_NOT_GRANTED;
if (!lp_locking(SNUM(conn)))
return NT_STATUS_OK;
/* NOTE! 0 byte long ranges ARE allowed and should be stored */
-
DEBUG(10,("do_lock: lock type %s start=%.0f len=%.0f requested for file %s\n",
lock_type_name(lock_type), (double)offset, (double)count, fsp->fsp_name ));
if (OPEN_FSP(fsp) && fsp->can_lock && (fsp->conn == conn)) {
status = brl_lock(fsp->dev, fsp->inode, fsp->fnum,
- lock_pid, sys_getpid(), conn->cnum,
+ lock_pid, procid_self(), conn->cnum,
offset, count,
- lock_type);
+ lock_type, my_lock_ctx);
if (NT_STATUS_IS_OK(status) && lp_posix_locking(SNUM(conn))) {
*/
if (!set_posix_lock(fsp, offset, count, lock_type)) {
- status = NT_STATUS_LOCK_NOT_GRANTED;
+ if (errno == EACCES || errno == EAGAIN)
+ status = NT_STATUS_FILE_LOCK_CONFLICT;
+ else
+ status = map_nt_error_from_unix(errno);
+
/*
* We failed to map - we must now remove the brl
* lock entry.
*/
(void)brl_unlock(fsp->dev, fsp->inode, fsp->fnum,
- lock_pid, sys_getpid(), conn->cnum,
- offset, count);
+ lock_pid, procid_self(), conn->cnum,
+ offset, count, False,
+ NULL, NULL);
}
}
}
}
/****************************************************************************
- Utility function called by locking requests. This is *DISGISTING*. It also
+ Utility function called by locking requests. This is *DISGUSTING*. It also
appears to be "What Windows Does" (tm). Andrew, ever wonder why Windows 2000
is so slow on the locking tests...... ? This is the reason. Much though I hate
it, we need this. JRA.
****************************************************************************/
NTSTATUS do_lock_spin(files_struct *fsp,connection_struct *conn, uint16 lock_pid,
- SMB_BIG_UINT count,SMB_BIG_UINT offset,enum brl_type lock_type)
+ SMB_BIG_UINT count,SMB_BIG_UINT offset,enum brl_type lock_type, BOOL *my_lock_ctx)
{
int j, maxj = lp_lock_spin_count();
int sleeptime = lp_lock_sleep_time();
ret = NT_STATUS_OK; /* to keep dumb compilers happy */
for (j = 0; j < maxj; j++) {
- status = do_lock(fsp, conn, lock_pid, count, offset, lock_type);
+ status = do_lock(fsp, conn, lock_pid, count, offset, lock_type, my_lock_ctx);
if (!NT_STATUS_EQUAL(status, NT_STATUS_LOCK_NOT_GRANTED) &&
!NT_STATUS_EQUAL(status, NT_STATUS_FILE_LOCK_CONFLICT)) {
return status;
/* if we do fail then return the first error code we got */
if (j == 0) {
ret = status;
+ /* Don't spin if we blocked ourselves. */
+ if (*my_lock_ctx)
+ return ret;
}
if (sleeptime)
sys_usleep(sleeptime);
return ret;
}
+/* Struct passed to brl_unlock. */
+struct posix_unlock_data_struct {
+ files_struct *fsp;
+ SMB_BIG_UINT offset;
+ SMB_BIG_UINT count;
+};
+
+/****************************************************************************
+ Function passed to brl_unlock to allow POSIX unlock to be done first.
+****************************************************************************/
+
+static void posix_unlock(void *pre_data)
+{
+ struct posix_unlock_data_struct *pdata = (struct posix_unlock_data_struct *)pre_data;
+
+ if (lp_posix_locking(SNUM(pdata->fsp->conn)))
+ release_posix_lock(pdata->fsp, pdata->offset, pdata->count);
+}
+
/****************************************************************************
Utility function called by unlocking requests.
****************************************************************************/
SMB_BIG_UINT count,SMB_BIG_UINT offset)
{
BOOL ok = False;
+ struct posix_unlock_data_struct posix_data;
if (!lp_locking(SNUM(conn)))
return NT_STATUS_OK;
* match then don't bother looking to remove POSIX locks.
*/
+ posix_data.fsp = fsp;
+ posix_data.offset = offset;
+ posix_data.count = count;
+
ok = brl_unlock(fsp->dev, fsp->inode, fsp->fnum,
- lock_pid, sys_getpid(), conn->cnum, offset, count);
+ lock_pid, procid_self(), conn->cnum, offset, count,
+ False, posix_unlock, (void *)&posix_data);
if (!ok) {
DEBUG(10,("do_unlock: returning ERRlock.\n" ));
return NT_STATUS_RANGE_NOT_LOCKED;
}
-
- if (!lp_posix_locking(SNUM(conn)))
- return NT_STATUS_OK;
-
- (void)release_posix_lock(fsp, offset, count);
-
return NT_STATUS_OK;
}
void locking_close_file(files_struct *fsp)
{
- pid_t pid = sys_getpid();
+ struct process_id pid = procid_self();
if (!lp_locking(SNUM(fsp->conn)))
return;
return True;
tdb = tdb_open_log(lock_path("locking.tdb"),
- 0, TDB_DEFAULT|(read_only?0x0:TDB_CLEAR_IF_FIRST),
- read_only?O_RDONLY:O_RDWR|O_CREAT,
- 0644);
+ SMB_OPEN_DATABASE_TDB_HASH_SIZE, TDB_DEFAULT|(read_only?0x0:TDB_CLEAR_IF_FIRST),
+ read_only?O_RDONLY:O_RDWR|O_CREAT,
+ 0644);
if (!tdb) {
DEBUG(0,("ERROR: Failed to initialise locking database\n"));
return False;
}
-
+
if (!posix_locking_init(read_only))
return False;
BOOL locking_end(void)
{
+ BOOL ret = True;
brl_shutdown(open_read_only);
if (tdb) {
-
if (tdb_close(tdb) != 0)
- return False;
+ ret = False;
}
- return True;
+ return ret;
}
/*******************************************************************
Form a static locking key for a dev/inode pair.
******************************************************************/
+/* key and data records in the tdb locking database */
+struct locking_key {
+ SMB_DEV_T dev;
+ SMB_INO_T ino;
+};
+
+/*******************************************************************
+ Form a static locking key for a dev/inode pair.
+******************************************************************/
+
static TDB_DATA locking_key(SMB_DEV_T dev, SMB_INO_T inode)
{
static struct locking_key key;
memset(&key, '\0', sizeof(key));
key.dev = dev;
- key.inode = inode;
+ key.ino = inode;
kbuf.dptr = (char *)&key;
kbuf.dsize = sizeof(key);
return kbuf;
}
-static TDB_DATA locking_key_fsp(files_struct *fsp)
-{
- return locking_key(fsp->dev, fsp->inode);
-}
-
-/*******************************************************************
- Lock a hash bucket entry.
-******************************************************************/
-
-BOOL lock_share_entry(connection_struct *conn,
- SMB_DEV_T dev, SMB_INO_T inode)
-{
- return tdb_chainlock(tdb, locking_key(dev, inode)) == 0;
-}
-
-/*******************************************************************
- Unlock a hash bucket entry.
-******************************************************************/
-
-void unlock_share_entry(connection_struct *conn,
- SMB_DEV_T dev, SMB_INO_T inode)
-{
- tdb_chainunlock(tdb, locking_key(dev, inode));
-}
-
-/*******************************************************************
- Lock a hash bucket entry. use a fsp for convenience
-******************************************************************/
-
-BOOL lock_share_entry_fsp(files_struct *fsp)
-{
- return tdb_chainlock(tdb, locking_key(fsp->dev, fsp->inode)) == 0;
-}
-
-/*******************************************************************
- Unlock a hash bucket entry.
-******************************************************************/
-
-void unlock_share_entry_fsp(files_struct *fsp)
-{
- tdb_chainunlock(tdb, locking_key(fsp->dev, fsp->inode));
-}
-
/*******************************************************************
Print out a share mode.
********************************************************************/
-static char *share_mode_str(int num, share_mode_entry *e)
+char *share_mode_str(int num, struct share_mode_entry *e)
{
static pstring share_str;
- slprintf(share_str, sizeof(share_str)-1, "share_mode_entry[%d]: \
-pid = %u, share_mode = 0x%x, desired_access = 0x%x, port = 0x%x, type= 0x%x, file_id = %lu, dev = 0x%x, inode = %.0f",
- num, e->pid, e->share_mode, (unsigned int)e->desired_access, e->op_port, e->op_type, e->share_file_id,
- (unsigned int)e->dev, (double)e->inode );
+ slprintf(share_str, sizeof(share_str)-1, "share_mode_entry[%d]: %s "
+ "pid = %s, share_access = 0x%x, private_options = 0x%x, "
+ "access_mask = 0x%x, mid = 0x%x, type= 0x%x, file_id = %lu, "
+ "dev = 0x%x, inode = %.0f",
+ num,
+ e->op_type == UNUSED_SHARE_MODE_ENTRY ? "UNUSED" : "",
+ procid_str_static(&e->pid),
+ e->share_access, e->private_options,
+ e->access_mask, e->op_mid, e->op_type, e->share_file_id,
+ (unsigned int)e->dev, (double)e->inode );
return share_str;
}
static void print_share_mode_table(struct locking_data *data)
{
- int num_share_modes = data->u.num_share_mode_entries;
- share_mode_entry *shares = (share_mode_entry *)(data + 1);
+ int num_share_modes = data->u.s.num_share_mode_entries;
+ struct share_mode_entry *shares =
+ (struct share_mode_entry *)(data + 1);
int i;
for (i = 0; i < num_share_modes; i++) {
- share_mode_entry *entry_p = &shares[i];
- DEBUG(10,("print_share_mode_table: %s\n", share_mode_str(i, entry_p) ));
+ struct share_mode_entry entry;
+
+ memcpy(&entry, &shares[i], sizeof(struct share_mode_entry));
+ DEBUG(10,("print_share_mode_table: %s\n",
+ share_mode_str(i, &entry)));
}
}
Get all share mode entries for a dev/inode pair.
********************************************************************/
-int get_share_modes(connection_struct *conn,
- SMB_DEV_T dev, SMB_INO_T inode,
- share_mode_entry **pp_shares)
+static BOOL parse_share_modes(TDB_DATA dbuf, struct share_mode_lock *lck)
{
- TDB_DATA dbuf;
struct locking_data *data;
- int num_share_modes;
- share_mode_entry *shares = NULL;
-
- *pp_shares = NULL;
+ int i;
- dbuf = tdb_fetch(tdb, locking_key(dev, inode));
- if (!dbuf.dptr)
- return 0;
+ if (dbuf.dsize < sizeof(struct locking_data)) {
+ smb_panic("PANIC: parse_share_modes: buffer too short.\n");
+ }
data = (struct locking_data *)dbuf.dptr;
- num_share_modes = data->u.num_share_mode_entries;
- if(num_share_modes) {
- int i;
- int del_count = 0;
- shares = (share_mode_entry *)memdup(dbuf.dptr + sizeof(*data),
- num_share_modes * sizeof(share_mode_entry));
+ lck->delete_on_close = data->u.s.delete_on_close;
+ lck->initial_delete_on_close = data->u.s.initial_delete_on_close;
+ lck->num_share_modes = data->u.s.num_share_mode_entries;
+
+ DEBUG(10, ("parse_share_modes: delete_on_close: %d, "
+ "initial_delete_on_close: %d, "
+ "num_share_modes: %d\n",
+ lck->delete_on_close,
+ lck->initial_delete_on_close,
+ lck->num_share_modes));
+
+ if ((lck->num_share_modes < 0) || (lck->num_share_modes > 1000000)) {
+ DEBUG(0, ("invalid number of share modes: %d\n",
+ lck->num_share_modes));
+ smb_panic("PANIC: invalid number of share modes");
+ }
+
+ lck->share_modes = NULL;
+
+ if (lck->num_share_modes != 0) {
- if (!shares) {
- SAFE_FREE(dbuf.dptr);
- return 0;
+ if (dbuf.dsize < (sizeof(struct locking_data) +
+ (lck->num_share_modes *
+ sizeof(struct share_mode_entry)))) {
+ smb_panic("PANIC: parse_share_modes: buffer too short.\n");
}
+
+ lck->share_modes = talloc_memdup(lck, dbuf.dptr+sizeof(*data),
+ lck->num_share_modes *
+ sizeof(struct share_mode_entry));
- /*
- * Ensure that each entry has a real process attached.
- */
+ if (lck->share_modes == NULL) {
+ smb_panic("talloc failed\n");
+ }
+ }
- for (i = 0; i < num_share_modes; ) {
- share_mode_entry *entry_p = &shares[i];
- if (process_exists(entry_p->pid)) {
- DEBUG(10,("get_share_modes: %s\n", share_mode_str(i, entry_p) ));
- i++;
- } else {
- DEBUG(10,("get_share_modes: deleted %s\n", share_mode_str(i, entry_p) ));
- memcpy( &shares[i], &shares[i+1],
- sizeof(share_mode_entry) * (num_share_modes - i - 1));
- num_share_modes--;
- del_count++;
- }
+ /* Get any delete token. */
+ if (data->u.s.delete_token_size) {
+ char *p = dbuf.dptr + sizeof(*data) +
+ (lck->num_share_modes *
+ sizeof(struct share_mode_entry));
+
+ if ((data->u.s.delete_token_size < sizeof(uid_t) + sizeof(gid_t)) ||
+ ((data->u.s.delete_token_size - sizeof(uid_t)) % sizeof(gid_t)) != 0) {
+ DEBUG(0, ("parse_share_modes: invalid token size %d\n",
+ data->u.s.delete_token_size));
+ smb_panic("parse_share_modes: invalid token size\n");
}
- /* Did we delete any ? If so, re-store in tdb. */
- if (del_count) {
- data->u.num_share_mode_entries = num_share_modes;
-
- if (num_share_modes)
- memcpy(dbuf.dptr + sizeof(*data), shares,
- num_share_modes * sizeof(share_mode_entry));
-
- /* The record has shrunk a bit */
- dbuf.dsize -= del_count * sizeof(share_mode_entry);
-
- if (tdb_store(tdb, locking_key(dev, inode), dbuf, TDB_REPLACE) == -1) {
- SAFE_FREE(shares);
- SAFE_FREE(dbuf.dptr);
- return 0;
+ lck->delete_token = TALLOC_P(lck, UNIX_USER_TOKEN);
+ if (!lck->delete_token) {
+ smb_panic("talloc failed\n");
+ }
+
+ /* Copy out the uid and gid. */
+ memcpy(&lck->delete_token->uid, p, sizeof(uid_t));
+ p += sizeof(uid_t);
+ memcpy(&lck->delete_token->gid, p, sizeof(gid_t));
+ p += sizeof(gid_t);
+
+ /* Any supplementary groups ? */
+ lck->delete_token->ngroups = (data->u.s.delete_token_size > (sizeof(uid_t) + sizeof(gid_t))) ?
+ ((data->u.s.delete_token_size -
+ (sizeof(uid_t) + sizeof(gid_t)))/sizeof(gid_t)) : 0;
+
+ if (lck->delete_token->ngroups) {
+ /* Make this a talloc child of lck->delete_token. */
+ lck->delete_token->groups = TALLOC_ARRAY(lck->delete_token, gid_t,
+ lck->delete_token->ngroups);
+ if (!lck->delete_token) {
+ smb_panic("talloc failed\n");
+ }
+
+ for (i = 0; i < lck->delete_token->ngroups; i++) {
+ memcpy(&lck->delete_token->groups[i], p, sizeof(gid_t));
+ p += sizeof(gid_t);
}
}
+
+ } else {
+ lck->delete_token = NULL;
}
- SAFE_FREE(dbuf.dptr);
- *pp_shares = shares;
- return num_share_modes;
-}
+ /* Save off the associated service path and filename. */
+ lck->servicepath = talloc_strdup(lck, dbuf.dptr + sizeof(*data) +
+ (lck->num_share_modes *
+ sizeof(struct share_mode_entry)) +
+ data->u.s.delete_token_size );
-/*******************************************************************
- Fill a share mode entry.
-********************************************************************/
+ lck->filename = talloc_strdup(lck, dbuf.dptr + sizeof(*data) +
+ (lck->num_share_modes *
+ sizeof(struct share_mode_entry)) +
+ data->u.s.delete_token_size +
+ strlen(lck->servicepath) + 1 );
-static void fill_share_mode(char *p, files_struct *fsp, uint16 port, uint16 op_type)
+ /*
+ * Ensure that each entry has a real process attached.
+ */
+
+ for (i = 0; i < lck->num_share_modes; i++) {
+ struct share_mode_entry *entry_p = &lck->share_modes[i];
+ DEBUG(10,("parse_share_modes: %s\n",
+ share_mode_str(i, entry_p) ));
+ if (!process_exists(entry_p->pid)) {
+ DEBUG(10,("parse_share_modes: deleted %s\n",
+ share_mode_str(i, entry_p) ));
+ entry_p->op_type = UNUSED_SHARE_MODE_ENTRY;
+ lck->modified = True;
+ }
+ }
+
+ return True;
+}
+
+static TDB_DATA unparse_share_modes(struct share_mode_lock *lck)
{
- share_mode_entry *e = (share_mode_entry *)p;
- void *x = &e->time; /* Needed to force alignment. p may not be aligned.... */
+ TDB_DATA result;
+ int num_valid = 0;
+ int i;
+ struct locking_data *data;
+ ssize_t offset;
+ ssize_t sp_len;
+ uint32 delete_token_size;
- memset(e, '\0', sizeof(share_mode_entry));
- e->pid = sys_getpid();
- e->share_mode = fsp->share_mode;
- e->desired_access = fsp->desired_access;
- e->op_port = port;
- e->op_type = op_type;
- memcpy(x, &fsp->open_time, sizeof(struct timeval));
- e->share_file_id = fsp->file_id;
- e->dev = fsp->dev;
- e->inode = fsp->inode;
+ result.dptr = NULL;
+ result.dsize = 0;
+
+ for (i=0; i<lck->num_share_modes; i++) {
+ if (!is_unused_share_mode_entry(&lck->share_modes[i])) {
+ num_valid += 1;
+ }
+ }
+
+ if (num_valid == 0) {
+ return result;
+ }
+
+ sp_len = strlen(lck->servicepath);
+ delete_token_size = (lck->delete_token ?
+ (sizeof(uid_t) + sizeof(gid_t) + (lck->delete_token->ngroups*sizeof(gid_t))) : 0);
+
+ result.dsize = sizeof(*data) +
+ lck->num_share_modes * sizeof(struct share_mode_entry) +
+ delete_token_size +
+ sp_len + 1 +
+ strlen(lck->filename) + 1;
+ result.dptr = talloc_size(lck, result.dsize);
+
+ if (result.dptr == NULL) {
+ smb_panic("talloc failed\n");
+ }
+
+ data = (struct locking_data *)result.dptr;
+ ZERO_STRUCTP(data);
+ data->u.s.num_share_mode_entries = lck->num_share_modes;
+ data->u.s.delete_on_close = lck->delete_on_close;
+ data->u.s.initial_delete_on_close = lck->initial_delete_on_close;
+ data->u.s.delete_token_size = delete_token_size;
+ DEBUG(10, ("unparse_share_modes: del: %d, initial del %d, tok = %u, num: %d\n",
+ data->u.s.delete_on_close,
+ data->u.s.initial_delete_on_close,
+ (unsigned int)data->u.s.delete_token_size,
+ data->u.s.num_share_mode_entries));
+ memcpy(result.dptr + sizeof(*data), lck->share_modes,
+ sizeof(struct share_mode_entry)*lck->num_share_modes);
+ offset = sizeof(*data) +
+ sizeof(struct share_mode_entry)*lck->num_share_modes;
+
+ /* Store any delete on close token. */
+ if (lck->delete_token) {
+ char *p = result.dptr + offset;
+
+ memcpy(p, &lck->delete_token->uid, sizeof(uid_t));
+ p += sizeof(uid_t);
+
+ memcpy(p, &lck->delete_token->gid, sizeof(gid_t));
+
+ for (i = 0; i < lck->delete_token->ngroups; i++) {
+ memcpy(p, &lck->delete_token->groups[i], sizeof(gid_t));
+ p += sizeof(gid_t);
+ }
+ offset = p - result.dptr;
+ }
+
+ safe_strcpy(result.dptr + offset, lck->servicepath,
+ result.dsize - offset - 1);
+ offset += sp_len + 1;
+ safe_strcpy(result.dptr + offset, lck->filename,
+ result.dsize - offset - 1);
+
+ if (DEBUGLEVEL >= 10) {
+ print_share_mode_table(data);
+ }
+
+ return result;
}
-/*******************************************************************
- Check if two share mode entries are identical, ignoring oplock
- and port info and desired_access.
-********************************************************************/
+static int share_mode_lock_destructor(void *p)
+{
+ struct share_mode_lock *lck =
+ talloc_get_type_abort(p, struct share_mode_lock);
+ TDB_DATA key = locking_key(lck->dev, lck->ino);
+ TDB_DATA data;
-BOOL share_modes_identical( share_mode_entry *e1, share_mode_entry *e2)
+ if (!lck->modified) {
+ goto done;
+ }
+
+ data = unparse_share_modes(lck);
+
+ if (data.dptr == NULL) {
+ if (!lck->fresh) {
+ /* There has been an entry before, delete it */
+ if (tdb_delete(tdb, key) == -1) {
+ smb_panic("Could not delete share entry\n");
+ }
+ }
+ goto done;
+ }
+
+ if (tdb_store(tdb, key, data, TDB_REPLACE) == -1) {
+ smb_panic("Could not store share mode entry\n");
+ }
+
+ done:
+ tdb_chainunlock(tdb, key);
+
+ return 0;
+}
+
+struct share_mode_lock *get_share_mode_lock(TALLOC_CTX *mem_ctx,
+ SMB_DEV_T dev, SMB_INO_T ino,
+ const char *servicepath,
+ const char *fname)
{
-#if 1 /* JRA PARANOIA TEST - REMOVE LATER */
- if (e1->pid == e2->pid &&
- e1->share_file_id == e2->share_file_id &&
- e1->dev == e2->dev &&
- e1->inode == e2->inode &&
- (e1->share_mode & ~DELETE_ON_CLOSE_FLAG) != (e2->share_mode & ~DELETE_ON_CLOSE_FLAG)) {
- DEBUG(0,("PANIC: share_modes_identical: share_mode missmatch (e1 = %u, e2 = %u). Logic error.\n",
- (unsigned int)(e1->share_mode & ~DELETE_ON_CLOSE_FLAG),
- (unsigned int)(e2->share_mode & ~DELETE_ON_CLOSE_FLAG) ));
- smb_panic("PANIC: share_modes_identical logic error.\n");
+ struct share_mode_lock *lck;
+ TDB_DATA key = locking_key(dev, ino);
+ TDB_DATA data;
+
+ lck = TALLOC_P(mem_ctx, struct share_mode_lock);
+ if (lck == NULL) {
+ DEBUG(0, ("talloc failed\n"));
+ return NULL;
}
-#endif
- return (e1->pid == e2->pid &&
- (e1->share_mode & ~DELETE_ON_CLOSE_FLAG) == (e2->share_mode & ~DELETE_ON_CLOSE_FLAG) &&
- e1->dev == e2->dev &&
- e1->inode == e2->inode &&
- e1->share_file_id == e2->share_file_id );
+ /* Ensure we set every field here as the destructor must be
+ valid even if parse_share_modes fails. */
+
+ lck->servicepath = NULL;
+ lck->filename = NULL;
+ lck->dev = dev;
+ lck->ino = ino;
+ lck->num_share_modes = 0;
+ lck->share_modes = NULL;
+ lck->delete_token = NULL;
+ lck->delete_on_close = False;
+ lck->initial_delete_on_close = False;
+ lck->fresh = False;
+ lck->modified = False;
+
+ if (tdb_chainlock(tdb, key) != 0) {
+ DEBUG(3, ("Could not lock share entry\n"));
+ TALLOC_FREE(lck);
+ return NULL;
+ }
+
+ /* We must set the destructor immediately after the chainlock
+ ensure the lock is cleaned up on any of the error return
+ paths below. */
+
+ talloc_set_destructor(lck, share_mode_lock_destructor);
+
+ data = tdb_fetch(tdb, key);
+ lck->fresh = (data.dptr == NULL);
+
+ if (lck->fresh) {
+
+ if (fname == NULL || servicepath == NULL) {
+ TALLOC_FREE(lck);
+ return NULL;
+ }
+ lck->filename = talloc_strdup(lck, fname);
+ lck->servicepath = talloc_strdup(lck, servicepath);
+ if (lck->filename == NULL || lck->servicepath == NULL) {
+ DEBUG(0, ("talloc failed\n"));
+ TALLOC_FREE(lck);
+ return NULL;
+ }
+ } else {
+ if (!parse_share_modes(data, lck)) {
+ DEBUG(0, ("Could not parse share modes\n"));
+ TALLOC_FREE(lck);
+ SAFE_FREE(data.dptr);
+ return NULL;
+ }
+ }
+
+ SAFE_FREE(data.dptr);
+
+ return lck;
}
/*******************************************************************
- Delete a specific share mode. Return the number
- of entries left, and a memdup'ed copy of the entry deleted (if required).
- Ignore if no entry deleted.
+ Sets the service name and filename for rename.
+ At this point we emit "file renamed" messages to all
+ process id's that have this file open.
+ Based on an initial code idea from SATOH Fumiyasu <fumiya@samba.gr.jp>
********************************************************************/
-ssize_t del_share_entry( SMB_DEV_T dev, SMB_INO_T inode,
- share_mode_entry *entry, share_mode_entry **ppse)
+BOOL rename_share_filename(struct share_mode_lock *lck,
+ const char *servicepath,
+ const char *newname)
{
- TDB_DATA dbuf;
- struct locking_data *data;
- int i, del_count=0;
- share_mode_entry *shares;
- ssize_t count = 0;
-
- if (ppse)
- *ppse = NULL;
+ size_t sp_len;
+ size_t fn_len;
+ size_t msg_len;
+ char *frm = NULL;
+ int i;
- /* read in the existing share modes */
- dbuf = tdb_fetch(tdb, locking_key(dev, inode));
- if (!dbuf.dptr)
- return -1;
+ if (!lck) {
+ return False;
+ }
- data = (struct locking_data *)dbuf.dptr;
- shares = (share_mode_entry *)(dbuf.dptr + sizeof(*data));
+ DEBUG(10, ("rename_share_filename: servicepath %s newname %s\n",
+ servicepath, newname));
/*
- * Find any with this pid and delete it
- * by overwriting with the rest of the data
- * from the record.
+ * rename_internal_fsp() and rename_internals() add './' to
+ * head of newname if newname does not contain a '/'.
*/
+ while (newname[0] && newname[1] && newname[0] == '.' && newname[1] == '/') {
+ newname += 2;
+ }
- DEBUG(10,("del_share_entry: num_share_modes = %d\n", data->u.num_share_mode_entries ));
+ lck->servicepath = talloc_strdup(lck, servicepath);
+ lck->filename = talloc_strdup(lck, newname);
+ if (lck->filename == NULL || lck->servicepath == NULL) {
+ DEBUG(0, ("rename_share_filename: talloc failed\n"));
+ return False;
+ }
+ lck->modified = True;
- for (i=0;i<data->u.num_share_mode_entries;) {
- if (share_modes_identical(&shares[i], entry)) {
- DEBUG(10,("del_share_entry: deleted %s\n",
- share_mode_str(i, &shares[i]) ));
- if (ppse)
- *ppse = memdup(&shares[i], sizeof(*shares));
- data->u.num_share_mode_entries--;
- memmove(&shares[i], &shares[i+1],
- dbuf.dsize - (sizeof(*data) + (i+1)*sizeof(*shares)));
- del_count++;
+ sp_len = strlen(lck->servicepath);
+ fn_len = strlen(lck->filename);
- DEBUG(10,("del_share_entry: deleting entry %d\n", i ));
+ msg_len = MSG_FILE_RENAMED_MIN_SIZE + sp_len + 1 + fn_len + 1;
- } else {
- i++;
- }
+ /* Set up the name changed message. */
+ frm = TALLOC(lck, msg_len);
+ if (!frm) {
+ return False;
}
- if (del_count) {
- /* the record may have shrunk a bit */
- dbuf.dsize -= del_count * sizeof(*shares);
+ SDEV_T_VAL(frm,0,lck->dev);
+ SINO_T_VAL(frm,8,lck->ino);
- count = (ssize_t)data->u.num_share_mode_entries;
+ DEBUG(10,("rename_share_filename: msg_len = %d\n", msg_len ));
- /* store it back in the database */
- if (data->u.num_share_mode_entries == 0) {
- if (tdb_delete(tdb, locking_key(dev, inode)) == -1)
- count = -1;
- } else {
- if (tdb_store(tdb, locking_key(dev, inode), dbuf, TDB_REPLACE) == -1)
- count = -1;
+ safe_strcpy(&frm[16], lck->servicepath, sp_len);
+ safe_strcpy(&frm[16 + sp_len + 1], lck->filename, fn_len);
+
+ /* Send the messages. */
+ for (i=0; i<lck->num_share_modes; i++) {
+ struct share_mode_entry *se = &lck->share_modes[i];
+ if (!is_valid_share_mode_entry(se)) {
+ continue;
}
+ /* But not to ourselves... */
+ if (procid_is_me(&se->pid)) {
+ continue;
+ }
+
+ DEBUG(10,("rename_share_filename: sending rename message to pid %u "
+ "dev %x, inode %.0f sharepath %s newname %s\n",
+ (unsigned int)procid_to_pid(&se->pid),
+ (unsigned int)lck->dev, (double)lck->ino,
+ lck->servicepath, lck->filename ));
+
+ become_root();
+ message_send_pid(se->pid, MSG_SMB_FILE_RENAME,
+ frm, msg_len, True);
+ unbecome_root();
}
- DEBUG(10,("del_share_entry: Remaining table.\n"));
- print_share_mode_table((struct locking_data *)dbuf.dptr);
- SAFE_FREE(dbuf.dptr);
- return count;
+
+ return True;
}
-/*******************************************************************
- Del the share mode of a file for this process. Return the number
- of entries left, and a memdup'ed copy of the entry deleted.
-********************************************************************/
+BOOL get_delete_on_close_flag(SMB_DEV_T dev, SMB_INO_T inode)
+{
+ BOOL result;
+ struct share_mode_lock *lck = get_share_mode_lock(NULL, dev, inode, NULL, NULL);
+ if (!lck) {
+ return False;
+ }
+ result = lck->delete_on_close;
+ TALLOC_FREE(lck);
+ return result;
+}
-ssize_t del_share_mode(files_struct *fsp, share_mode_entry **ppse)
+BOOL is_valid_share_mode_entry(const struct share_mode_entry *e)
{
- share_mode_entry entry;
+ int num_props = 0;
- /*
- * Fake up a share_mode_entry for comparisons.
- */
+ num_props += ((e->op_type == NO_OPLOCK) ? 1 : 0);
+ num_props += (EXCLUSIVE_OPLOCK_TYPE(e->op_type) ? 1 : 0);
+ num_props += (LEVEL_II_OPLOCK_TYPE(e->op_type) ? 1 : 0);
+
+ SMB_ASSERT(num_props <= 1);
+ return (num_props != 0);
+}
+
+BOOL is_deferred_open_entry(const struct share_mode_entry *e)
+{
+ return (e->op_type == DEFERRED_OPEN_ENTRY);
+}
- fill_share_mode((char *)&entry, fsp, 0, 0);
- return del_share_entry(fsp->dev, fsp->inode, &entry, ppse);
+BOOL is_unused_share_mode_entry(const struct share_mode_entry *e)
+{
+ return (e->op_type == UNUSED_SHARE_MODE_ENTRY);
}
/*******************************************************************
- Set the share mode of a file. Return False on fail, True on success.
+ Fill a share mode entry.
********************************************************************/
-BOOL set_share_mode(files_struct *fsp, uint16 port, uint16 op_type)
+static void fill_share_mode_entry(struct share_mode_entry *e,
+ files_struct *fsp,
+ uint16 mid, uint16 op_type)
{
- TDB_DATA dbuf;
- struct locking_data *data;
- char *p=NULL;
- int size;
- BOOL ret = True;
-
- /* read in the existing share modes if any */
- dbuf = tdb_fetch(tdb, locking_key_fsp(fsp));
- if (!dbuf.dptr) {
- /* we'll need to create a new record */
- pstring fname;
-
- pstrcpy(fname, fsp->conn->connectpath);
- pstrcat(fname, "/");
- pstrcat(fname, fsp->fsp_name);
-
- size = sizeof(*data) + sizeof(share_mode_entry) + strlen(fname) + 1;
- p = (char *)malloc(size);
- if (!p)
- return False;
- data = (struct locking_data *)p;
- data->u.num_share_mode_entries = 1;
-
- DEBUG(10,("set_share_mode: creating entry for file %s. num_share_modes = 1\n",
- fsp->fsp_name ));
+ ZERO_STRUCTP(e);
+ e->pid = procid_self();
+ e->share_access = fsp->share_access;
+ e->private_options = fsp->fh->private_options;
+ e->access_mask = fsp->access_mask;
+ e->op_mid = mid;
+ e->op_type = op_type;
+ e->time.tv_sec = fsp->open_time.tv_sec;
+ e->time.tv_usec = fsp->open_time.tv_usec;
+ e->share_file_id = fsp->file_id;
+ e->dev = fsp->dev;
+ e->inode = fsp->inode;
+}
- pstrcpy(p + sizeof(*data) + sizeof(share_mode_entry), fname);
- fill_share_mode(p + sizeof(*data), fsp, port, op_type);
- dbuf.dptr = p;
- dbuf.dsize = size;
- if (tdb_store(tdb, locking_key_fsp(fsp), dbuf, TDB_REPLACE) == -1)
- ret = False;
+static void fill_deferred_open_entry(struct share_mode_entry *e,
+ const struct timeval request_time,
+ SMB_DEV_T dev, SMB_INO_T ino, uint16 mid)
+{
+ ZERO_STRUCTP(e);
+ e->pid = procid_self();
+ e->op_mid = mid;
+ e->op_type = DEFERRED_OPEN_ENTRY;
+ e->time.tv_sec = request_time.tv_sec;
+ e->time.tv_usec = request_time.tv_usec;
+ e->dev = dev;
+ e->inode = ino;
+}
- print_share_mode_table((struct locking_data *)p);
+static void add_share_mode_entry(struct share_mode_lock *lck,
+ const struct share_mode_entry *entry)
+{
+ int i;
- SAFE_FREE(p);
- return ret;
+ for (i=0; i<lck->num_share_modes; i++) {
+ struct share_mode_entry *e = &lck->share_modes[i];
+ if (is_unused_share_mode_entry(e)) {
+ *e = *entry;
+ break;
+ }
}
- /* we're adding to an existing entry - this is a bit fiddly */
- data = (struct locking_data *)dbuf.dptr;
+ if (i == lck->num_share_modes) {
+ /* No unused entry found */
+ ADD_TO_ARRAY(lck, struct share_mode_entry, *entry,
+ &lck->share_modes, &lck->num_share_modes);
+ }
+ lck->modified = True;
+}
- data->u.num_share_mode_entries++;
-
- DEBUG(10,("set_share_mode: adding entry for file %s. new num_share_modes = %d\n",
- fsp->fsp_name, data->u.num_share_mode_entries ));
+void set_share_mode(struct share_mode_lock *lck, files_struct *fsp,
+ uint16 mid, uint16 op_type)
+{
+ struct share_mode_entry entry;
+ fill_share_mode_entry(&entry, fsp, mid, op_type);
+ add_share_mode_entry(lck, &entry);
+}
- size = dbuf.dsize + sizeof(share_mode_entry);
- p = malloc(size);
- if (!p)
- return False;
- memcpy(p, dbuf.dptr, sizeof(*data));
- fill_share_mode(p + sizeof(*data), fsp, port, op_type);
- memcpy(p + sizeof(*data) + sizeof(share_mode_entry), dbuf.dptr + sizeof(*data),
- dbuf.dsize - sizeof(*data));
- SAFE_FREE(dbuf.dptr);
- dbuf.dptr = p;
- dbuf.dsize = size;
- if (tdb_store(tdb, locking_key_fsp(fsp), dbuf, TDB_REPLACE) == -1)
- ret = False;
- print_share_mode_table((struct locking_data *)p);
- SAFE_FREE(p);
- return ret;
+void add_deferred_open(struct share_mode_lock *lck, uint16 mid,
+ struct timeval request_time,
+ SMB_DEV_T dev, SMB_INO_T ino)
+{
+ struct share_mode_entry entry;
+ fill_deferred_open_entry(&entry, request_time, dev, ino, mid);
+ add_share_mode_entry(lck, &entry);
}
/*******************************************************************
- A generic in-place modification call for share mode entries.
+ Check if two share mode entries are identical, ignoring oplock
+ and mid info and desired_access.
********************************************************************/
-static BOOL mod_share_mode( SMB_DEV_T dev, SMB_INO_T inode, share_mode_entry *entry,
- void (*mod_fn)(share_mode_entry *, SMB_DEV_T, SMB_INO_T, void *),
- void *param)
+static BOOL share_modes_identical(struct share_mode_entry *e1,
+ struct share_mode_entry *e2)
{
- TDB_DATA dbuf;
- struct locking_data *data;
- int i;
- share_mode_entry *shares;
- BOOL need_store=False;
- BOOL ret = True;
+#if 1 /* JRA PARANOIA TEST - REMOVE LATER */
+ if (procid_equal(&e1->pid, &e2->pid) &&
+ e1->share_file_id == e2->share_file_id &&
+ e1->dev == e2->dev &&
+ e1->inode == e2->inode &&
+ (e1->share_access) != (e2->share_access)) {
+ DEBUG(0,("PANIC: share_modes_identical: share_mode "
+ "mismatch (e1 = 0x%x, e2 = 0x%x). Logic error.\n",
+ (unsigned int)e1->share_access,
+ (unsigned int)e2->share_access ));
+ smb_panic("PANIC: share_modes_identical logic error.\n");
+ }
+#endif
- /* read in the existing share modes */
- dbuf = tdb_fetch(tdb, locking_key(dev, inode));
- if (!dbuf.dptr)
- return False;
+ return (procid_equal(&e1->pid, &e2->pid) &&
+ (e1->share_access) == (e2->share_access) &&
+ e1->dev == e2->dev &&
+ e1->inode == e2->inode &&
+ e1->share_file_id == e2->share_file_id );
+}
- data = (struct locking_data *)dbuf.dptr;
- shares = (share_mode_entry *)(dbuf.dptr + sizeof(*data));
+static BOOL deferred_open_identical(struct share_mode_entry *e1,
+ struct share_mode_entry *e2)
+{
+ return (procid_equal(&e1->pid, &e2->pid) &&
+ (e1->op_mid == e2->op_mid) &&
+ (e1->dev == e2->dev) &&
+ (e1->inode == e2->inode));
+}
- /* find any with our pid and call the supplied function */
- for (i=0;i<data->u.num_share_mode_entries;i++) {
- if (share_modes_identical(entry, &shares[i])) {
- mod_fn(&shares[i], dev, inode, param);
- need_store=True;
- }
- }
+static struct share_mode_entry *find_share_mode_entry(struct share_mode_lock *lck,
+ struct share_mode_entry *entry)
+{
+ int i;
- /* if the mod fn was called then store it back */
- if (need_store) {
- if (data->u.num_share_mode_entries == 0) {
- if (tdb_delete(tdb, locking_key(dev, inode)) == -1)
- ret = False;
- } else {
- if (tdb_store(tdb, locking_key(dev, inode), dbuf, TDB_REPLACE) == -1)
- ret = False;
+ for (i=0; i<lck->num_share_modes; i++) {
+ struct share_mode_entry *e = &lck->share_modes[i];
+ if (is_valid_share_mode_entry(entry) &&
+ is_valid_share_mode_entry(e) &&
+ share_modes_identical(e, entry)) {
+ return e;
+ }
+ if (is_deferred_open_entry(entry) &&
+ is_deferred_open_entry(e) &&
+ deferred_open_identical(e, entry)) {
+ return e;
}
}
-
- SAFE_FREE(dbuf.dptr);
- return ret;
+ return NULL;
}
/*******************************************************************
- Static function that actually does the work for the generic function
- below.
+ Del the share mode of a file for this process. Return the number of
+ entries left.
********************************************************************/
-static void remove_share_oplock_fn(share_mode_entry *entry, SMB_DEV_T dev, SMB_INO_T inode,
- void *param)
+BOOL del_share_mode(struct share_mode_lock *lck, files_struct *fsp)
{
- DEBUG(10,("remove_share_oplock_fn: removing oplock info for entry dev=%x ino=%.0f\n",
- (unsigned int)dev, (double)inode ));
- /* Delete the oplock info. */
- entry->op_port = 0;
- entry->op_type = NO_OPLOCK;
-}
+ struct share_mode_entry entry, *e;
-/*******************************************************************
- Remove an oplock port and mode entry from a share mode.
-********************************************************************/
+ fill_share_mode_entry(&entry, fsp, 0, NO_OPLOCK);
-BOOL remove_share_oplock(files_struct *fsp)
+ e = find_share_mode_entry(lck, &entry);
+ if (e == NULL) {
+ return False;
+ }
+
+ e->op_type = UNUSED_SHARE_MODE_ENTRY;
+ lck->modified = True;
+ return True;
+}
+
+void del_deferred_open_entry(struct share_mode_lock *lck, uint16 mid)
{
- share_mode_entry entry;
- /*
- * Fake up an entry for comparisons...
- */
- fill_share_mode((char *)&entry, fsp, 0, 0);
- return mod_share_mode(fsp->dev, fsp->inode, &entry, remove_share_oplock_fn, NULL);
+ struct share_mode_entry entry, *e;
+
+ fill_deferred_open_entry(&entry, timeval_zero(),
+ lck->dev, lck->ino, mid);
+
+ e = find_share_mode_entry(lck, &entry);
+ if (e == NULL) {
+ return;
+ }
+
+ e->op_type = UNUSED_SHARE_MODE_ENTRY;
+ lck->modified = True;
}
/*******************************************************************
- Static function that actually does the work for the generic function
- below.
+ Remove an oplock mid and mode entry from a share mode.
********************************************************************/
-static void downgrade_share_oplock_fn(share_mode_entry *entry, SMB_DEV_T dev, SMB_INO_T inode,
- void *param)
+BOOL remove_share_oplock(struct share_mode_lock *lck, files_struct *fsp)
{
- DEBUG(10,("downgrade_share_oplock_fn: downgrading oplock info for entry dev=%x ino=%.0f\n",
- (unsigned int)dev, (double)inode ));
- entry->op_type = LEVEL_II_OPLOCK;
+ struct share_mode_entry entry, *e;
+
+ fill_share_mode_entry(&entry, fsp, 0, NO_OPLOCK);
+
+ e = find_share_mode_entry(lck, &entry);
+ if (e == NULL) {
+ return False;
+ }
+
+ e->op_mid = 0;
+ e->op_type = NO_OPLOCK;
+ lck->modified = True;
+ return True;
}
/*******************************************************************
Downgrade a oplock type from exclusive to level II.
********************************************************************/
-BOOL downgrade_share_oplock(files_struct *fsp)
+BOOL downgrade_share_oplock(struct share_mode_lock *lck, files_struct *fsp)
{
- share_mode_entry entry;
+ struct share_mode_entry entry, *e;
+
+ fill_share_mode_entry(&entry, fsp, 0, NO_OPLOCK);
+
+ e = find_share_mode_entry(lck, &entry);
+ if (e == NULL) {
+ return False;
+ }
+
+ e->op_type = LEVEL_II_OPLOCK;
+ lck->modified = True;
+ return True;
+}
+
+/****************************************************************************
+ Deal with the internal needs of setting the delete on close flag. Note that
+ as the tdb locking is recursive, it is safe to call this from within
+ open_file_shared. JRA.
+****************************************************************************/
+
+NTSTATUS can_set_delete_on_close(files_struct *fsp, BOOL delete_on_close,
+ uint32 dosmode)
+{
+ if (!delete_on_close) {
+ return NT_STATUS_OK;
+ }
+
+ /*
+ * Only allow delete on close for writable files.
+ */
+
+ if ((dosmode & aRONLY) &&
+ !lp_delete_readonly(SNUM(fsp->conn))) {
+ DEBUG(10,("can_set_delete_on_close: file %s delete on close "
+ "flag set but file attribute is readonly.\n",
+ fsp->fsp_name ));
+ return NT_STATUS_CANNOT_DELETE;
+ }
+
+ /*
+ * Only allow delete on close for writable shares.
+ */
+
+ if (!CAN_WRITE(fsp->conn)) {
+ DEBUG(10,("can_set_delete_on_close: file %s delete on "
+ "close flag set but write access denied on share.\n",
+ fsp->fsp_name ));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
/*
- * Fake up an entry for comparisons...
+ * Only allow delete on close for files/directories opened with delete
+ * intent.
*/
- fill_share_mode((char *)&entry, fsp, 0, 0);
- return mod_share_mode(fsp->dev, fsp->inode, &entry, downgrade_share_oplock_fn, NULL);
+
+ if (!(fsp->access_mask & DELETE_ACCESS)) {
+ DEBUG(10,("can_set_delete_on_close: file %s delete on "
+ "close flag set but delete access denied.\n",
+ fsp->fsp_name ));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ return NT_STATUS_OK;
}
-/*******************************************************************
- Get/Set the delete on close flag in a set of share modes.
- Return False on fail, True on success.
-********************************************************************/
+/*************************************************************************
+ Return a talloced copy of a UNIX_USER_TOKEN. NULL on fail.
+ (Should this be in locking.c.... ?).
+*************************************************************************/
-BOOL modify_delete_flag( SMB_DEV_T dev, SMB_INO_T inode, BOOL delete_on_close)
+static UNIX_USER_TOKEN *copy_unix_token(TALLOC_CTX *ctx, UNIX_USER_TOKEN *tok)
{
- TDB_DATA dbuf;
- struct locking_data *data;
- int i;
- share_mode_entry *shares;
-
- /* read in the existing share modes */
- dbuf = tdb_fetch(tdb, locking_key(dev, inode));
- if (!dbuf.dptr)
- return False;
+ UNIX_USER_TOKEN *cpy;
- data = (struct locking_data *)dbuf.dptr;
- shares = (share_mode_entry *)(dbuf.dptr + sizeof(*data));
+ if (tok == NULL) {
+ return NULL;
+ }
- /* Set/Unset the delete on close element. */
- for (i=0;i<data->u.num_share_mode_entries;i++,shares++) {
- shares->share_mode = (delete_on_close ?
- (shares->share_mode | DELETE_ON_CLOSE_FLAG) :
- (shares->share_mode & ~DELETE_ON_CLOSE_FLAG) );
+ cpy = TALLOC_P(ctx, UNIX_USER_TOKEN);
+ if (!cpy) {
+ return NULL;
}
- /* store it back */
- if (data->u.num_share_mode_entries) {
- if (tdb_store(tdb, locking_key(dev,inode), dbuf, TDB_REPLACE)==-1) {
- SAFE_FREE(dbuf.dptr);
- return False;
+ cpy->uid = tok->uid;
+ cpy->gid = tok->gid;
+ cpy->ngroups = tok->ngroups;
+ if (tok->ngroups) {
+ /* Make this a talloc child of cpy. */
+ cpy->groups = TALLOC_ARRAY(cpy, gid_t, tok->ngroups);
+ if (!cpy->groups) {
+ return NULL;
}
+ memcpy(cpy->groups, tok->groups, tok->ngroups * sizeof(gid_t));
}
+ return cpy;
+}
- SAFE_FREE(dbuf.dptr);
- return True;
+/****************************************************************************
+ Replace the delete on close token.
+****************************************************************************/
+
+void set_delete_on_close_token(struct share_mode_lock *lck, UNIX_USER_TOKEN *tok)
+{
+ /* Ensure there's no token. */
+ if (lck->delete_token) {
+ TALLOC_FREE(lck->delete_token); /* Also deletes groups... */
+ lck->delete_token = NULL;
+ }
+
+ /* Copy the new token (can be NULL). */
+ lck->delete_token = copy_unix_token(lck, tok);
+ lck->modified = True;
}
/****************************************************************************
- Traverse the whole database with this function, calling traverse_callback
- on each share mode
+ Sets the delete on close flag over all share modes on this file.
+ Modify the share mode entry for all files open
+ on this device and inode to tell other smbds we have
+ changed the delete on close flag. This will be noticed
+ in the close code, the last closer will delete the file
+ if flag is set.
+ Note that setting this to any value clears the initial_delete_on_close flag.
+ If delete_on_close is True this makes a copy of any UNIX_USER_TOKEN into the
+ lck entry.
****************************************************************************/
+BOOL set_delete_on_close(files_struct *fsp, BOOL delete_on_close, UNIX_USER_TOKEN *tok)
+{
+ struct share_mode_lock *lck;
+
+ DEBUG(10,("set_delete_on_close: %s delete on close flag for "
+ "fnum = %d, file %s\n",
+ delete_on_close ? "Adding" : "Removing", fsp->fnum,
+ fsp->fsp_name ));
+
+ if (fsp->is_stat) {
+ return True;
+ }
+
+ lck = get_share_mode_lock(NULL, fsp->dev, fsp->inode, NULL, NULL);
+ if (lck == NULL) {
+ return False;
+ }
+
+ if (lck->delete_on_close != delete_on_close) {
+ set_delete_on_close_token(lck, tok);
+ lck->delete_on_close = delete_on_close;
+ if (delete_on_close) {
+ SMB_ASSERT(lck->delete_token != NULL);
+ }
+ lck->modified = True;
+ }
+
+ if (lck->initial_delete_on_close) {
+ lck->initial_delete_on_close = False;
+ lck->modified = True;
+ }
+
+ TALLOC_FREE(lck);
+ return True;
+}
+
static int traverse_fn(TDB_CONTEXT *the_tdb, TDB_DATA kbuf, TDB_DATA dbuf,
- void* state)
+ void *state)
{
struct locking_data *data;
- share_mode_entry *shares;
- char *name;
+ struct share_mode_entry *shares;
+ const char *sharepath;
+ const char *fname;
int i;
+ void (*traverse_callback)(struct share_mode_entry *, const char *, const char *) = state;
- SHAREMODE_FN(traverse_callback) = (SHAREMODE_FN_CAST())state;
+ /* Ensure this is a locking_key record. */
+ if (kbuf.dsize != sizeof(struct locking_key))
+ return 0;
data = (struct locking_data *)dbuf.dptr;
- shares = (share_mode_entry *)(dbuf.dptr + sizeof(*data));
- name = dbuf.dptr + sizeof(*data) + data->u.num_share_mode_entries*sizeof(*shares);
-
- for (i=0;i<data->u.num_share_mode_entries;i++) {
- traverse_callback(&shares[i], name);
+ shares = (struct share_mode_entry *)(dbuf.dptr + sizeof(*data));
+ sharepath = dbuf.dptr + sizeof(*data) +
+ data->u.s.num_share_mode_entries*sizeof(*shares) +
+ data->u.s.delete_token_size;
+ fname = dbuf.dptr + sizeof(*data) +
+ data->u.s.num_share_mode_entries*sizeof(*shares) +
+ data->u.s.delete_token_size +
+ strlen(sharepath) + 1;
+
+ for (i=0;i<data->u.s.num_share_mode_entries;i++) {
+ traverse_callback(&shares[i], sharepath, fname);
}
return 0;
}
share mode system.
********************************************************************/
-int share_mode_forall(SHAREMODE_FN(fn))
+int share_mode_forall(void (*fn)(const struct share_mode_entry *, const char *, const char *))
{
- if (!tdb)
+ if (tdb == NULL)
return 0;
- return tdb_traverse(tdb, traverse_fn, (void*)fn);
+ return tdb_traverse(tdb, traverse_fn, fn);
}
git.samba.org / samba.git / blobdiff