Unix SMB/CIFS implementation.
Locking functions
Copyright (C) Andrew Tridgell 1992-2000
- Copyright (C) Jeremy Allison 1992-2000
+ Copyright (C) Jeremy Allison 1992-2006
Copyright (C) Volker Lendecke 2005
This program is free software; you can redistribute it and/or modify
rewrtten completely to use new tdb code. Tridge, Dec '99
Added POSIX locking support. Jeremy Allison (jeremy@valinux.com), Apr. 2000.
+ Added Unix Extensions POSIX locking support. Jeremy Allison Mar 2006.
*/
#include "includes.h"
-uint16 global_smbpid;
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_LOCKING
/* the locking database handle */
static TDB_CONTEXT *tdb;
-struct locking_data {
- union {
- struct {
- int num_share_mode_entries;
- BOOL delete_on_close;
- } s;
- struct share_mode_entry dummy; /* Needed for alignment. */
- } u;
- /* the following two entries are implicit
- struct share_mode_entry modes[num_share_mode_entries];
- char file_name[];
- */
-};
-
/****************************************************************************
- Debugging aid :-).
+ Debugging aids :-).
****************************************************************************/
-static const char *lock_type_name(enum brl_type lock_type)
+const char *lock_type_name(enum brl_type lock_type)
+{
+ switch (lock_type) {
+ case READ_LOCK:
+ return "READ";
+ case WRITE_LOCK:
+ return "WRITE";
+ case PENDING_READ_LOCK:
+ return "PENDING_READ";
+ case PENDING_WRITE_LOCK:
+ return "PENDING_WRITE";
+ default:
+ return "other";
+ }
+}
+
+const char *lock_flav_name(enum brl_flavour lock_flav)
{
- return (lock_type == READ_LOCK) ? "READ" : "WRITE";
+ return (lock_flav == WINDOWS_LOCK) ? "WINDOWS_LOCK" : "POSIX_LOCK";
}
/****************************************************************************
Utility function called to see if a file region is locked.
+ Called in the read/write codepath.
****************************************************************************/
-BOOL is_locked(files_struct *fsp,connection_struct *conn,
- SMB_BIG_UINT count,SMB_BIG_UINT offset,
- enum brl_type lock_type)
+BOOL is_locked(files_struct *fsp,
+ uint32 smbpid,
+ SMB_BIG_UINT count,
+ SMB_BIG_UINT offset,
+ enum brl_type lock_type)
{
- int snum = SNUM(conn);
- int strict_locking = lp_strict_locking(snum);
- BOOL ret;
+ int strict_locking = lp_strict_locking(fsp->conn->params);
+ enum brl_flavour lock_flav = lp_posix_cifsu_locktype(fsp);
+ BOOL ret = True;
- if (count == 0)
- return(False);
+ if (count == 0) {
+ return False;
+ }
- if (!lp_locking(snum) || !strict_locking)
- return(False);
+ if (!lp_locking(fsp->conn->params) || !strict_locking) {
+ return False;
+ }
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;
+ ret = False;
} 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;
+ ret = False;
} else {
- ret = !brl_locktest(fsp->dev, fsp->inode, fsp->fnum,
- global_smbpid, procid_self(), conn->cnum,
- offset, count, lock_type);
+ struct byte_range_lock *br_lck = brl_get_locks_readonly(NULL, fsp);
+ if (!br_lck) {
+ return False;
+ }
+ ret = !brl_locktest(br_lck,
+ smbpid,
+ procid_self(),
+ offset,
+ count,
+ lock_type,
+ lock_flav);
+ TALLOC_FREE(br_lck);
}
} else {
- ret = !brl_locktest(fsp->dev, fsp->inode, fsp->fnum,
- global_smbpid, procid_self(), conn->cnum,
- offset, count, lock_type);
+ struct byte_range_lock *br_lck = brl_get_locks_readonly(NULL, fsp);
+ if (!br_lck) {
+ return False;
+ }
+ ret = !brl_locktest(br_lck,
+ smbpid,
+ procid_self(),
+ offset,
+ count,
+ lock_type,
+ lock_flav);
+ TALLOC_FREE(br_lck);
}
- DEBUG(10,("is_locked: brl start=%.0f len=%.0f %s for file %s\n",
+ DEBUG(10,("is_locked: flavour = %s brl start=%.0f len=%.0f %s for fnum %d file %s\n",
+ lock_flav_name(lock_flav),
(double)offset, (double)count, ret ? "locked" : "unlocked",
- fsp->fsp_name ));
-
- /*
- * There is no lock held by an SMB daemon, check to
- * see if there is a POSIX lock from a UNIX or NFS process.
- */
-
- if(!ret && lp_posix_locking(snum)) {
- ret = is_posix_locked(fsp, offset, count, lock_type);
-
- DEBUG(10,("is_locked: posix start=%.0f len=%.0f %s for file %s\n",
- (double)offset, (double)count, ret ? "locked" : "unlocked",
- fsp->fsp_name ));
- }
+ fsp->fnum, fsp->fsp_name ));
return ret;
}
/****************************************************************************
- Utility function called by locking requests.
+ Find out if a lock could be granted - return who is blocking us if we can't.
****************************************************************************/
-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, BOOL *my_lock_ctx)
+NTSTATUS query_lock(files_struct *fsp,
+ uint32 *psmbpid,
+ SMB_BIG_UINT *pcount,
+ SMB_BIG_UINT *poffset,
+ enum brl_type *plock_type,
+ enum brl_flavour lock_flav)
{
+ struct byte_range_lock *br_lck = NULL;
NTSTATUS status = NT_STATUS_LOCK_NOT_GRANTED;
- if (!lp_locking(SNUM(conn)))
- return NT_STATUS_OK;
+ if (!fsp->can_lock) {
+ return fsp->is_directory ? NT_STATUS_INVALID_DEVICE_REQUEST : NT_STATUS_INVALID_HANDLE;
+ }
- /* NOTE! 0 byte long ranges ARE allowed and should be stored */
+ if (!lp_locking(fsp->conn->params)) {
+ return NT_STATUS_OK;
+ }
- 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, procid_self(), conn->cnum,
- offset, count,
- lock_type, my_lock_ctx);
-
- if (NT_STATUS_IS_OK(status) && lp_posix_locking(SNUM(conn))) {
-
- /*
- * Try and get a POSIX lock on this range.
- * Note that this is ok if it is a read lock
- * overlapping on a different fd. JRA.
- */
-
- if (!set_posix_lock(fsp, offset, count, lock_type)) {
- 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, procid_self(), conn->cnum,
- offset, count, False,
- NULL, NULL);
- }
- }
+ br_lck = brl_get_locks_readonly(NULL, fsp);
+ if (!br_lck) {
+ return NT_STATUS_NO_MEMORY;
}
+ status = brl_lockquery(br_lck,
+ psmbpid,
+ procid_self(),
+ poffset,
+ pcount,
+ plock_type,
+ lock_flav);
+
+ TALLOC_FREE(br_lck);
return status;
}
/****************************************************************************
- 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.
+ Utility function called by locking requests.
****************************************************************************/
-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, BOOL *my_lock_ctx)
+struct byte_range_lock *do_lock(struct messaging_context *msg_ctx,
+ files_struct *fsp,
+ uint32 lock_pid,
+ SMB_BIG_UINT count,
+ SMB_BIG_UINT offset,
+ enum brl_type lock_type,
+ enum brl_flavour lock_flav,
+ BOOL blocking_lock,
+ NTSTATUS *perr)
{
- int j, maxj = lp_lock_spin_count();
- int sleeptime = lp_lock_sleep_time();
- NTSTATUS status, ret;
+ struct byte_range_lock *br_lck = NULL;
- if (maxj <= 0)
- maxj = 1;
+ if (!fsp->can_lock) {
+ *perr = fsp->is_directory ? NT_STATUS_INVALID_DEVICE_REQUEST : NT_STATUS_INVALID_HANDLE;
+ return NULL;
+ }
- ret = NT_STATUS_OK; /* to keep dumb compilers happy */
+ if (!lp_locking(fsp->conn->params)) {
+ *perr = NT_STATUS_OK;
+ return NULL;
+ }
- for (j = 0; j < maxj; j++) {
- 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);
+ /* NOTE! 0 byte long ranges ARE allowed and should be stored */
+
+ DEBUG(10,("do_lock: lock flavour %s lock type %s start=%.0f len=%.0f requested for fnum %d file %s\n",
+ lock_flav_name(lock_flav), lock_type_name(lock_type),
+ (double)offset, (double)count, fsp->fnum, fsp->fsp_name ));
+
+ br_lck = brl_get_locks(NULL, fsp);
+ if (!br_lck) {
+ *perr = NT_STATUS_NO_MEMORY;
+ return NULL;
}
- return ret;
-}
-/* Struct passed to brl_unlock. */
-struct posix_unlock_data_struct {
- files_struct *fsp;
- SMB_BIG_UINT offset;
- SMB_BIG_UINT count;
-};
+ *perr = brl_lock(msg_ctx,
+ br_lck,
+ lock_pid,
+ procid_self(),
+ offset,
+ count,
+ lock_type,
+ lock_flav,
+ blocking_lock);
-/****************************************************************************
- Function passed to brl_unlock to allow POSIX unlock to be done first.
-****************************************************************************/
+ /* blocking ie. pending, locks also count here,
+ * as this is an efficiency counter to avoid checking
+ * the lock db. on close. JRA. */
-static void posix_unlock(void *pre_data)
-{
- struct posix_unlock_data_struct *pdata = (struct posix_unlock_data_struct *)pre_data;
+ fsp->current_lock_count++;
- if (lp_posix_locking(SNUM(pdata->fsp->conn)))
- release_posix_lock(pdata->fsp, pdata->offset, pdata->count);
+ return br_lck;
}
/****************************************************************************
Utility function called by unlocking requests.
****************************************************************************/
-NTSTATUS do_unlock(files_struct *fsp,connection_struct *conn, uint16 lock_pid,
- SMB_BIG_UINT count,SMB_BIG_UINT offset)
+NTSTATUS do_unlock(struct messaging_context *msg_ctx,
+ files_struct *fsp,
+ uint32 lock_pid,
+ SMB_BIG_UINT count,
+ SMB_BIG_UINT offset,
+ enum brl_flavour lock_flav)
{
BOOL ok = False;
- struct posix_unlock_data_struct posix_data;
+ struct byte_range_lock *br_lck = NULL;
- if (!lp_locking(SNUM(conn)))
- return NT_STATUS_OK;
+ if (!fsp->can_lock) {
+ return fsp->is_directory ? NT_STATUS_INVALID_DEVICE_REQUEST : NT_STATUS_INVALID_HANDLE;
+ }
- if (!OPEN_FSP(fsp) || !fsp->can_lock || (fsp->conn != conn)) {
- return NT_STATUS_INVALID_HANDLE;
+ if (!lp_locking(fsp->conn->params)) {
+ return NT_STATUS_OK;
}
- DEBUG(10,("do_unlock: unlock start=%.0f len=%.0f requested for file %s\n",
- (double)offset, (double)count, fsp->fsp_name ));
-
- /*
- * Remove the existing lock record from the tdb lockdb
- * before looking at POSIX locks. If this record doesn't
- * match then don't bother looking to remove POSIX locks.
- */
+ DEBUG(10,("do_unlock: unlock start=%.0f len=%.0f requested for fnum %d file %s\n",
+ (double)offset, (double)count, fsp->fnum, fsp->fsp_name ));
- posix_data.fsp = fsp;
- posix_data.offset = offset;
- posix_data.count = count;
+ br_lck = brl_get_locks(NULL, fsp);
+ if (!br_lck) {
+ return NT_STATUS_NO_MEMORY;
+ }
- ok = brl_unlock(fsp->dev, fsp->inode, fsp->fnum,
- lock_pid, procid_self(), conn->cnum, offset, count,
- False, posix_unlock, (void *)&posix_data);
+ ok = brl_unlock(msg_ctx,
+ br_lck,
+ lock_pid,
+ procid_self(),
+ offset,
+ count,
+ lock_flav);
+ TALLOC_FREE(br_lck);
+
if (!ok) {
DEBUG(10,("do_unlock: returning ERRlock.\n" ));
return NT_STATUS_RANGE_NOT_LOCKED;
}
+
+ SMB_ASSERT(fsp->current_lock_count > 0);
+ fsp->current_lock_count--;
+
+ return NT_STATUS_OK;
+}
+
+/****************************************************************************
+ Cancel any pending blocked locks.
+****************************************************************************/
+
+NTSTATUS do_lock_cancel(files_struct *fsp,
+ uint32 lock_pid,
+ SMB_BIG_UINT count,
+ SMB_BIG_UINT offset,
+ enum brl_flavour lock_flav)
+{
+ BOOL ok = False;
+ struct byte_range_lock *br_lck = NULL;
+
+ if (!fsp->can_lock) {
+ return fsp->is_directory ?
+ NT_STATUS_INVALID_DEVICE_REQUEST : NT_STATUS_INVALID_HANDLE;
+ }
+
+ if (!lp_locking(fsp->conn->params)) {
+ return NT_STATUS_DOS(ERRDOS, ERRcancelviolation);
+ }
+
+ DEBUG(10,("do_lock_cancel: cancel start=%.0f len=%.0f requested for fnum %d file %s\n",
+ (double)offset, (double)count, fsp->fnum, fsp->fsp_name ));
+
+ br_lck = brl_get_locks(NULL, fsp);
+ if (!br_lck) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ ok = brl_lock_cancel(br_lck,
+ lock_pid,
+ procid_self(),
+ offset,
+ count,
+ lock_flav);
+
+ TALLOC_FREE(br_lck);
+
+ if (!ok) {
+ DEBUG(10,("do_lock_cancel: returning ERRcancelviolation.\n" ));
+ return NT_STATUS_DOS(ERRDOS, ERRcancelviolation);
+ }
+
+ SMB_ASSERT(fsp->current_lock_count > 0);
+ fsp->current_lock_count--;
+
return NT_STATUS_OK;
}
Remove any locks on this fd. Called from file_close().
****************************************************************************/
-void locking_close_file(files_struct *fsp)
+void locking_close_file(struct messaging_context *msg_ctx,
+ files_struct *fsp)
{
- struct process_id pid = procid_self();
+ struct byte_range_lock *br_lck;
- if (!lp_locking(SNUM(fsp->conn)))
+ if (!lp_locking(fsp->conn->params)) {
return;
+ }
- /*
- * Just release all the brl locks, no need to release individually.
+ /* If we have not outstanding locks or pending
+ * locks then we don't need to look in the lock db.
*/
- brl_close(fsp->dev, fsp->inode, pid, fsp->conn->cnum, fsp->fnum);
-
- if(lp_posix_locking(SNUM(fsp->conn))) {
+ if (fsp->current_lock_count == 0) {
+ return;
+ }
- /*
- * Release all the POSIX locks.
- */
- posix_locking_close_file(fsp);
+ br_lck = brl_get_locks(NULL,fsp);
+ if (br_lck) {
+ cancel_pending_lock_requests_by_fid(fsp, br_lck);
+ brl_close_fnum(msg_ctx, br_lck);
+ TALLOC_FREE(br_lck);
}
}
return True;
tdb = tdb_open_log(lock_path("locking.tdb"),
- SMB_OPEN_DATABASE_TDB_HASH_SIZE, TDB_DEFAULT|(read_only?0x0:TDB_CLEAR_IF_FIRST),
+ lp_open_files_db_hash_size(),
+ TDB_DEFAULT|(read_only?0x0:TDB_CLEAR_IF_FIRST),
read_only?O_RDONLY:O_RDWR|O_CREAT,
0644);
return False;
}
+ /* Activate the per-hashchain freelist */
+ tdb_set_max_dead(tdb, 5);
+
if (!posix_locking_init(read_only))
return False;
memset(&key, '\0', sizeof(key));
key.dev = dev;
key.ino = inode;
- kbuf.dptr = (char *)&key;
+ kbuf.dptr = (uint8 *)&key;
kbuf.dsize = sizeof(key);
return kbuf;
}
{
static pstring share_str;
- slprintf(share_str, sizeof(share_str)-1, "share_mode_entry[%d]: "
+ 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, procid_str_static(&e->pid),
+ "uid = %u, flags = %u, 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->uid, (unsigned int)e->flags,
(unsigned int)e->dev, (double)e->inode );
return share_str;
int i;
for (i = 0; i < num_share_modes; i++) {
- struct share_mode_entry *entry_p = &shares[i];
+ 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_p)));
+ share_mode_str(i, &entry)));
}
}
int i;
if (dbuf.dsize < sizeof(struct locking_data)) {
- DEBUG(0, ("parse_share_modes: buffer too short\n"));
- return False;
+ smb_panic("PANIC: parse_share_modes: buffer too short.\n");
}
data = (struct locking_data *)dbuf.dptr;
lck->num_share_modes = data->u.s.num_share_mode_entries;
DEBUG(10, ("parse_share_modes: delete_on_close: %d, "
- "num_share_modes: %d\n", lck->delete_on_close,
- lck->num_share_modes));
+ "num_share_modes: %d\n",
+ lck->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));
- return False;
+ smb_panic("PANIC: invalid number of share modes");
}
lck->share_modes = NULL;
-
+
if (lck->num_share_modes != 0) {
if (dbuf.dsize < (sizeof(struct locking_data) +
(lck->num_share_modes *
sizeof(struct share_mode_entry)))) {
- DEBUG(0, ("parse_share_modes: buffer too short\n"));
- return False;
+ 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));
+ lck->share_modes = (struct share_mode_entry *)
+ TALLOC_MEMDUP(lck, dbuf.dptr+sizeof(*data),
+ lck->num_share_modes *
+ sizeof(struct share_mode_entry));
if (lck->share_modes == NULL) {
- DEBUG(0, ("talloc failed\n"));
- return False;
+ smb_panic("talloc failed\n");
}
}
- /* Save off the associated filename. */
- lck->filename = talloc_strdup(lck, dbuf.dptr + sizeof(*data) +
- lck->num_share_modes *
- sizeof(struct share_mode_entry));
+ /* Get any delete token. */
+ if (data->u.s.delete_token_size) {
+ uint8 *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");
+ }
+
+ 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;
+ }
+
+ /* Save off the associated service path and filename. */
+ lck->servicepath = talloc_strdup(lck, (const char *)dbuf.dptr + sizeof(*data) +
+ (lck->num_share_modes *
+ sizeof(struct share_mode_entry)) +
+ data->u.s.delete_token_size );
+ if (lck->servicepath == NULL) {
+ smb_panic("talloc_strdup failed\n");
+ }
+
+ lck->filename = talloc_strdup(lck, (const char *)dbuf.dptr + sizeof(*data) +
+ (lck->num_share_modes *
+ sizeof(struct share_mode_entry)) +
+ data->u.s.delete_token_size +
+ strlen(lck->servicepath) + 1 );
+ if (lck->filename == NULL) {
+ smb_panic("talloc_strdup failed\n");
+ }
/*
* Ensure that each entry has a real process attached.
int i;
struct locking_data *data;
ssize_t offset;
+ ssize_t sp_len;
+ uint32 delete_token_size;
result.dptr = NULL;
result.dsize = 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);
+ result.dptr = TALLOC_ARRAY(lck, uint8, result.dsize);
if (result.dptr == NULL) {
smb_panic("talloc failed\n");
ZERO_STRUCTP(data);
data->u.s.num_share_mode_entries = lck->num_share_modes;
data->u.s.delete_on_close = lck->delete_on_close;
- DEBUG(10, ("unparse_share_modes: del: %d, num: %d\n",
- data->u.s.delete_on_close,
- data->u.s.num_share_mode_entries));
+ data->u.s.delete_token_size = delete_token_size;
+ DEBUG(10, ("unparse_share_modes: del: %d, tok = %u, num: %d\n",
+ data->u.s.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;
- safe_strcpy(result.dptr + offset, lck->filename,
+
+ /* Store any delete on close token. */
+ if (lck->delete_token) {
+ uint8 *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));
+ p += 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((char *)result.dptr + offset, lck->servicepath,
+ result.dsize - offset - 1);
+ offset += sp_len + 1;
+ safe_strcpy((char *)result.dptr + offset, lck->filename,
result.dsize - offset - 1);
- print_share_mode_table(data);
+
+ if (DEBUGLEVEL >= 10) {
+ print_share_mode_table(data);
+ }
+
return result;
}
-static int share_mode_lock_destructor(void *p)
+static int share_mode_lock_destructor(struct share_mode_lock *lck)
{
- 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;
}
struct share_mode_lock *get_share_mode_lock(TALLOC_CTX *mem_ctx,
- SMB_DEV_T dev, SMB_INO_T ino,
- const char *fname)
+ SMB_DEV_T dev, SMB_INO_T ino,
+ const char *servicepath,
+ const char *fname)
{
struct share_mode_lock *lck;
TDB_DATA key = locking_key(dev, ino);
return NULL;
}
+ /* 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->delete_on_close = False;
lck->num_share_modes = 0;
lck->share_modes = NULL;
+ lck->delete_token = NULL;
+ lck->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);
+ 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) {
- DEBUG(0, ("New file, but no filename supplied\n"));
- talloc_free(lck);
+
+ if (fname == NULL || servicepath == NULL) {
+ TALLOC_FREE(lck);
return NULL;
}
lck->filename = talloc_strdup(lck, fname);
- if (lck->filename == NULL) {
+ lck->servicepath = talloc_strdup(lck, servicepath);
+ if (lck->filename == NULL || lck->servicepath == NULL) {
DEBUG(0, ("talloc failed\n"));
- talloc_free(lck);
+ TALLOC_FREE(lck);
return NULL;
}
} else {
if (!parse_share_modes(data, lck)) {
DEBUG(0, ("Could not parse share modes\n"));
- talloc_free(lck);
+ TALLOC_FREE(lck);
SAFE_FREE(data.dptr);
return NULL;
}
}
- talloc_set_destructor(lck, share_mode_lock_destructor);
SAFE_FREE(data.dptr);
return lck;
}
-BOOL get_delete_on_close_flag(SMB_DEV_T dev, SMB_INO_T inode,
- const char *fname)
+/*******************************************************************
+ 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>
+********************************************************************/
+
+BOOL rename_share_filename(struct messaging_context *msg_ctx,
+ struct share_mode_lock *lck,
+ const char *servicepath,
+ const char *newname)
+{
+ size_t sp_len;
+ size_t fn_len;
+ size_t msg_len;
+ char *frm = NULL;
+ int i;
+ DATA_BLOB msg;
+
+ if (!lck) {
+ return False;
+ }
+
+ DEBUG(10, ("rename_share_filename: servicepath %s newname %s\n",
+ servicepath, newname));
+
+ /*
+ * 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;
+ }
+
+ 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;
+
+ sp_len = strlen(lck->servicepath);
+ fn_len = strlen(lck->filename);
+
+ msg_len = MSG_FILE_RENAMED_MIN_SIZE + sp_len + 1 + fn_len + 1;
+
+ /* Set up the name changed message. */
+ frm = TALLOC_ARRAY(lck, char, msg_len);
+ if (!frm) {
+ return False;
+ }
+
+ SDEV_T_VAL(frm,0,lck->dev);
+ SINO_T_VAL(frm,8,lck->ino);
+
+ DEBUG(10,("rename_share_filename: msg_len = %u\n", (unsigned int)msg_len ));
+
+ safe_strcpy(&frm[16], lck->servicepath, sp_len);
+ safe_strcpy(&frm[16 + sp_len + 1], lck->filename, fn_len);
+
+ msg = data_blob_const(frm, msg_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 %s "
+ "dev %x, inode %.0f sharepath %s newname %s\n",
+ procid_str_static(&se->pid),
+ (unsigned int)lck->dev, (double)lck->ino,
+ lck->servicepath, lck->filename ));
+
+ messaging_send(msg_ctx, se->pid, MSG_SMB_FILE_RENAME, &msg);
+ }
+
+ return True;
+}
+
+static int pull_delete_on_close_flag(TDB_DATA key, TDB_DATA dbuf,
+ void *private_data)
+{
+ BOOL *result = (BOOL *)private_data;
+ struct locking_data *data;
+
+ if (dbuf.dsize < sizeof(struct locking_data)) {
+ smb_panic("PANIC: parse_share_modes: buffer too short.\n");
+ }
+
+ data = (struct locking_data *)dbuf.dptr;
+
+ *result = data->u.s.delete_on_close;
+ return 0;
+}
+
+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,
- fname);
- result = lck->delete_on_close;
- talloc_free(lck);
+ TDB_DATA key = locking_key(dev, inode);
+ BOOL result = False;
+
+ tdb_parse_record(tdb, key, pull_delete_on_close_flag,
+ (void *)&result);
return result;
}
static void fill_share_mode_entry(struct share_mode_entry *e,
files_struct *fsp,
- uint16 mid, uint16 op_type)
+ uid_t uid, uint16 mid, uint16 op_type)
{
ZERO_STRUCTP(e);
e->pid = procid_self();
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;
+ e->share_file_id = fsp->fh->file_id;
+ e->uid = (uint32)uid;
+ e->flags = fsp->posix_open ? SHARE_MODE_FLAG_POSIX_OPEN : 0;
}
static void fill_deferred_open_entry(struct share_mode_entry *e,
e->time.tv_usec = request_time.tv_usec;
e->dev = dev;
e->inode = ino;
+ e->uid = (uint32)-1;
+ e->flags = 0;
}
static void add_share_mode_entry(struct share_mode_lock *lck,
}
void set_share_mode(struct share_mode_lock *lck, files_struct *fsp,
- uint16 mid, uint16 op_type)
+ uid_t uid, uint16 mid, uint16 op_type)
{
struct share_mode_entry entry;
- fill_share_mode_entry(&entry, fsp, mid, op_type);
+ fill_share_mode_entry(&entry, fsp, uid, mid, op_type);
add_share_mode_entry(lck, &entry);
}
/*******************************************************************
Check if two share mode entries are identical, ignoring oplock
- and mid info and desired_access.
+ and mid info and desired_access. (Removed paranoia test - it's
+ not automatically a logic error if they are identical. JRA.)
********************************************************************/
static BOOL share_modes_identical(struct share_mode_entry *e1,
struct share_mode_entry *e2)
{
-#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
+ /* We used to check for e1->share_access == e2->share_access here
+ as well as the other fields but 2 different DOS or FCB opens
+ sharing the same share mode entry may validly differ in
+ fsp->share_access field. */
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 );
{
struct share_mode_entry entry, *e;
- fill_share_mode_entry(&entry, fsp, 0, 0);
+ /* Don't care about the pid owner being correct here - just a search. */
+ fill_share_mode_entry(&entry, fsp, (uid_t)-1, 0, NO_OPLOCK);
e = find_share_mode_entry(lck, &entry);
if (e == NULL) {
{
struct share_mode_entry entry, *e;
- fill_share_mode_entry(&entry, fsp, 0, 0);
+ /* Don't care about the pid owner being correct here - just a search. */
+ fill_share_mode_entry(&entry, fsp, (uid_t)-1, 0, NO_OPLOCK);
e = find_share_mode_entry(lck, &entry);
if (e == NULL) {
{
struct share_mode_entry entry, *e;
- fill_share_mode_entry(&entry, fsp, 0, 0);
+ /* Don't care about the pid owner being correct here - just a search. */
+ fill_share_mode_entry(&entry, fsp, (uid_t)-1, 0, NO_OPLOCK);
e = find_share_mode_entry(lck, &entry);
if (e == NULL) {
return True;
}
-
-/*******************************************************************
- We've just told all the smbd's that our level2 or fake level2 has been
- written to.
-********************************************************************/
-BOOL remove_all_share_oplocks(struct share_mode_lock *lck, files_struct *fsp)
-{
- int i;
- for (i=0; i<lck->num_share_modes; i++) {
- struct share_mode_entry *e = &lck->share_modes[i];
- if (!is_valid_share_mode_entry(e)) {
- continue;
- }
- if (e->op_type == NO_OPLOCK) {
- continue;
- }
- e->op_type = NO_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.
+ open_file_ntcreate. JRA.
****************************************************************************/
NTSTATUS can_set_delete_on_close(files_struct *fsp, BOOL delete_on_close,
return NT_STATUS_ACCESS_DENIED;
}
+ /* Don't allow delete on close for non-empty directories. */
+ if (fsp->is_directory) {
+ return can_delete_directory(fsp->conn, fsp->fsp_name);
+ }
+
return NT_STATUS_OK;
}
+/*************************************************************************
+ Return a talloced copy of a UNIX_USER_TOKEN. NULL on fail.
+ (Should this be in locking.c.... ?).
+*************************************************************************/
+
+static UNIX_USER_TOKEN *copy_unix_token(TALLOC_CTX *ctx, UNIX_USER_TOKEN *tok)
+{
+ UNIX_USER_TOKEN *cpy;
+
+ if (tok == NULL) {
+ return NULL;
+ }
+
+ cpy = TALLOC_P(ctx, UNIX_USER_TOKEN);
+ if (!cpy) {
+ return NULL;
+ }
+
+ 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;
+}
+
+/****************************************************************************
+ 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;
+}
+
/****************************************************************************
Sets the delete on close flag over all share modes on this file.
Modify the share mode entry for all files open
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.
+ This makes a copy of any UNIX_USER_TOKEN into the
+ lck entry. This function is used when the lock is already granted.
****************************************************************************/
-BOOL set_delete_on_close(files_struct *fsp, BOOL delete_on_close)
+void set_delete_on_close_lck(struct share_mode_lock *lck, BOOL delete_on_close, UNIX_USER_TOKEN *tok)
+{
+ 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;
+ }
+}
+
+BOOL set_delete_on_close(files_struct *fsp, BOOL delete_on_close, UNIX_USER_TOKEN *tok)
{
struct share_mode_lock *lck;
return True;
}
- lck = get_share_mode_lock(NULL, fsp->dev, fsp->inode, NULL);
+ 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) {
- lck->delete_on_close = delete_on_close;
- lck->modified = True;
+
+ set_delete_on_close_lck(lck, delete_on_close, tok);
+
+ if (fsp->is_directory) {
+ send_stat_cache_delete_message(fsp->fsp_name);
}
- talloc_free(lck);
+ TALLOC_FREE(lck);
return True;
}
+struct forall_state {
+ void (*fn)(const struct share_mode_entry *entry,
+ const char *sharepath,
+ const char *fname,
+ void *private_data);
+ void *private_data;
+};
+
static int traverse_fn(TDB_CONTEXT *the_tdb, TDB_DATA kbuf, TDB_DATA dbuf,
- void *state)
+ void *_state)
{
+ struct forall_state *state = (struct forall_state *)_state;
struct locking_data *data;
struct share_mode_entry *shares;
- char *name;
+ const char *sharepath;
+ const char *fname;
int i;
- void (*traverse_callback)(struct share_mode_entry *, char *) = state;
/* Ensure this is a locking_key record. */
if (kbuf.dsize != sizeof(struct locking_key))
data = (struct locking_data *)dbuf.dptr;
shares = (struct share_mode_entry *)(dbuf.dptr + sizeof(*data));
- name = dbuf.dptr + sizeof(*data) +
- data->u.s.num_share_mode_entries*sizeof(*shares);
+ sharepath = (const char *)dbuf.dptr + sizeof(*data) +
+ data->u.s.num_share_mode_entries*sizeof(*shares) +
+ data->u.s.delete_token_size;
+ fname = (const char *)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], name);
+ state->fn(&shares[i], sharepath, fname,
+ state->private_data);
}
return 0;
}
share mode system.
********************************************************************/
-int share_mode_forall(void (*fn)(const struct share_mode_entry *, char *))
+int share_mode_forall(void (*fn)(const struct share_mode_entry *, const char *,
+ const char *, void *),
+ void *private_data)
{
+ struct forall_state state;
+
if (tdb == NULL)
return 0;
- return tdb_traverse(tdb, traverse_fn, fn);
+
+ state.fn = fn;
+ state.private_data = private_data;
+
+ return tdb_traverse(tdb, traverse_fn, (void *)&state);
}
git.samba.org / sfrench / samba-autobuild / .git / blobdiff