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Make formatting a bit more ReST-valid.

(This used to be commit ea718a0c0b1efd73020da6d5a362b371afd8e371)
This commit is contained in:
Jelmer Vernooij 2008-02-10 22:24:09 +01:00
parent 321e9a5ada
commit 84a269410c
2 changed files with 30 additions and 36 deletions

6
TODO
View File

@ -3,15 +3,9 @@ source/lib/registry/TODO
source/lib/tdr/TODO
source/pidl/TODO
upgrade process (from Samba3):
- Rename upgrade to upgrade3 (to avoid confusion with upgrades
from earlier Samba4 releases in the future)
- Add support for reading WINS TDB files as well as WINS dat files.
- seperate adminlog mechanism (as opposed to the current DEBUG log,
which is not really aimed at administrators but more at developers)
Perhaps similar to eventlog so we can also use eventlog to retrieve the data?
- improve handling of test results in testsuite
- testsuite for the 'net' tool

View File

@ -58,11 +58,11 @@ Static and Global Data
The basic rule is "avoid static and global data like the plague". What
do I mean by static data? The way to tell if you have static data in a
file is to use the "size" utility in Linux. For example if we run:
file is to use the "size" utility in Linux. For example if we run::
size libcli/raw/*.o
in Samba4 then you get the following:
in Samba4 then you get the following::
text data bss dec hex filename
2015 0 0 2015 7df libcli/raw/clikrb5.o
@ -91,7 +91,7 @@ notice that the "data" and "bss" columns are all zero? That is
good. If there are any non-zero values in data or bss then that
indicates static data and is bad (as a rule of thumb).
Lets compare that result to the equivalent in Samba3:
Lets compare that result to the equivalent in Samba3::
text data bss dec hex filename
3978 0 0 3978 f8a libsmb/asn1.o
@ -142,11 +142,11 @@ notice all of the non-zero data and bss elements? Every bit of that
data is a bug waiting to happen.
Static data is evil as it has the following consequences:
- it makes code much less likely to be thread-safe
- it makes code much less likely to be recursion-safe
- it leads to subtle side effects when the same code is called from
- it makes code much less likely to be thread-safe
- it makes code much less likely to be recursion-safe
- it leads to subtle side effects when the same code is called from
multiple places
- doesn't play well with shared libraries or plugins
- doesn't play well with shared libraries or plugins
Static data is particularly evil in library code (such as our internal
smb and rpc libraries). If you can get rid of all static data in
@ -237,10 +237,10 @@ In the Samba3 msrpc code we used explicit parse structures for all
msrpc functions. The problem is that we didn't just put all of the
real variables in these structures, we also put in all the artifacts
as well. A good example is the security descriptor strucrure that
looks like this in Samba3:
looks like this in Samba3::
typedef struct security_descriptor_info
{
typedef struct security_descriptor_info
{
uint16 revision;
uint16 type;
@ -253,7 +253,7 @@ typedef struct security_descriptor_info
SEC_ACL *sacl;
DOM_SID *owner_sid;
DOM_SID *grp_sid;
} SEC_DESC;
} SEC_DESC;
The problem with this structure is all the off_* variables. Those are
not part of the interface, and do not appear in any real descriptions
@ -301,11 +301,11 @@ just about everywhere.
The first aspect of the async design to look at is the SMB client
library. Lets take a look at the following three functions in
libcli/raw/rawfile.c:
libcli/raw/rawfile.c::
struct cli_request *smb_raw_seek_send(struct cli_tree *tree, struct smb_seek *parms);
NTSTATUS smb_raw_seek_recv(struct cli_request *req, struct smb_seek *parms);
NTSTATUS smb_raw_seek(struct cli_tree *tree, struct smb_seek *parms);
struct cli_request *smb_raw_seek_send(struct cli_tree *tree, struct smb_seek *parms);
NTSTATUS smb_raw_seek_recv(struct cli_request *req, struct smb_seek *parms);
NTSTATUS smb_raw_seek(struct cli_tree *tree, struct smb_seek *parms);
Go and read them now then come back.
@ -327,7 +327,7 @@ one called smb_raw_XXXX(). That just calls the first two in order, and
blocks waiting for the reply.
But what if you want to be called when the reply comes in? Yes, thats
possible. You can do things like this:
possible. You can do things like this::
struct cli_request *req;
@ -374,7 +374,7 @@ to just like in Samba3, but it also has the option of answering the
request asynchronously. The only backend that currently does this is
the CIFS backend, but I hope the other backends will soon do this to.
To make this work you need to do things like this in the backend:
To make this work you need to do things like this in the backend::
req->control_flags |= REQ_CONTROL_ASYNC;
@ -450,7 +450,7 @@ and read it. Yes, that means you!).
Notice the union? That's how Samba4 allows a single NTVFS backend
interface to handle the several different ways of doing a write
operation in the SMB protocol. Now lets look at one section of that
union:
union::
/* SMBwriteX interface */
struct {
@ -473,7 +473,7 @@ union:
see the "in" and "out" sections? The "in" section is for parameters
that the SMB client sends on the wire as part of the request. The smbd
front end parse code parses the wire request and fills in all those
parameters. It then calls the NTVFS interface which looks like this:
parameters. It then calls the NTVFS interface which looks like this::
NTSTATUS (*write)(struct request_context *req, union smb_write *io);