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share_mode_data->flags contains the "most restrictive" share mode of
the whole array. This is maintained lazily: Whenever set_share_mode()
is called, d->flags is updated if the new share mode got more
restrictive. It is not updated when a file is closed, as this would
mean we would have to walk the whole array, making sure that the
closed handle was indeed the only most restrictive one. Instead, we
walk the share mode array only when a conflict happens: Then we need
to know "the truth" and recalculate it by walking the share mode
array.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Wed Sep 18 00:07:13 UTC 2019 on sn-devel-184
This will contain a summary of the "most restrictive" share mode and
lease, i.e. intersection of all share_access entries and the union of
all access_mask and leases in the share mode array. This way
open_mode_check in the non-conflicting case will only have to look at
the summary and not walk the share mode array.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
All places that matter explicitly check for staleness. This cleanup
action should only happen before writing the database
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
We have to break leases referenced from multiple share modes only
once.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
The durable reconnect mainly has to check that there is one and only one
entry, and it has to reset it with the new values.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Why? Next commit will make share_mode_forall_leases() use
share_mode_forall_entries(), and that does not necessarily have to
depend on "share_mode_lock". And as we can pass the required
information via "private_data", don't embed the "share_mode_lock"
reference into this lowlevel library routine.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
It does not have to depend on the whole struct share_mode_data.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Make the real data dependencies clearer, we don't need a full
share_entry, only its access and sharemode masks
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
It was hard for me to understand share_conflict(), so once I understood
it I thought this version would be easier to follow. It violates
README.Coding (one argument per line), but grouping the parameters to
mask_conflict makes it clearer to me what belongs together.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Mind the missing space before "(e.g. another...". While there, avoid
casts.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Less bytes .text, the compiler now does not have to expect other threads to
alter the pointers.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
All become_*()/unbecome_*() functions don't alter the working
directory. Only change_to_user_and_service*() does.
Pair-Programmed-With: Ralph Boehme <slow@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Wed Sep 11 21:16:57 UTC 2019 on sn-devel-184
There was only one caller left.
Pair-Programmed-With: Ralph Boehme <slow@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
We should make the behavior change (that gives up some protection)
more obvious, by changing the function names.
At least some OEMs have patches relying on the 4.9/4.10 behaviour
and we want them to detect that they have to do more work when they
need to change directories.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This was the behavior in versions before 4.9 and
it is hopefully not required by current callers of
become_user*().
Pair-Programmed-With: Ralph Boehme <slow@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
In the next commit we'll drop the _and_service() part.
Pair-Programmed-With: Ralph Boehme <slow@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Prepares for removing changing cwd from become_user*() in a subsequent commit.
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Ralph Boehme <slow@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Ralph Boehme <slow@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This helps admins to figure out which user has a problem
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Wed Sep 11 19:44:44 UTC 2019 on sn-devel-184
Currently identical to SMB_VFS_MKDIR().
Next, add to all VFS modules that implement
mkdir and eventually remove mkdir.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
This is needed to correctly call the XXXAT() vfs calls.
We should probably just use create_conn_struct_tos_cwd() here
and pass $cwd instead of using create_conn_struct_tos() and
passing "/" as the share root. We wouldn't change the current
working directory and the created share root would be set to $cwd
but I'm not sure what effects this may have on users of pysmbd
in case any of them pass paths above the $cwd to these functions.
Less changes to just call vfs_ChDir(conn, &cwd) which doesn't
change the current directory and leaves the share root as "/".
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
The whole logic only applies to files.
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Wed Sep 11 00:33:26 UTC 2019 on sn-devel-184
&= does bitwise AND, and does not do boolean short-circuiting if the
variable is already 0. As has_other_nonposix_opens() might have its
cost, this speeds up closing a handle.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This ensures we preserve btime, itime and File-ID.
As the Durable Handles code calls vfs_stat_fsp() in the DH disconnect function,
previously the btime was lost and NOT stored in the cookie. With this change the
cookie will store the correct btime (and iflags), which requires us to call
dos_mode() in the reconnect function to ensure we pass
vfs_default_durable_reconnect_check_stat().
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14121
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Tue Sep 10 20:22:21 UTC 2019 on sn-devel-184
Both functions do the same, they differ just in the type of the returned result.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14121
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Initialize the File-ID in fsp->fsp_name->st, any subsequent metadata fetch on
this file-handle needs this, eg QFID SMB2 Create-Context or GETINFO SMB
requests.
It would be nice if SMB_VFS_SET_DOS_ATTRIBUTE() would do this, unfortunately it
gets a const struct smb_filename.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14121
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
This allows the vfs backend to detect a retry and keep state between
the retries.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14113
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
This allows the VFS backends to implement async byte
range locking.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14113
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
