paraslash/attribute.c, branch v0.3

Fix com_init() in case arguments are given.

2009-07-11T19:01:27Z

As the ->name field of struct afs_table was only initialized in the afs process, com_init(), which gets forked from the server process, did not see the table names and would segfault due to a NULL pointer dereference if table names were given as arguments. Fix it by initializing the ->name fields in the definition of the afs_tables array. This bug was introduced in commit 53d503ce back in 2007...

Fix various dead stores found by the clang static analyzer.

2009-03-18T22:05:22Z

attribute.c: Trivial docu fix.

2009-02-04T21:32:34Z

Various small cleanups and documentation improvements.

2009-01-11T23:43:21Z

Change year of copyright from 2008 to 2009.

2009-01-10T00:53:18Z

Replace MAX, MIN, ABS macros by type-checking variants.

2008-12-01T15:51:37Z

Taken from the Linux kernel. These macros also evaluate each parameter only once. Fix up all resulting gcc warnings.

Fix -Wdeclaration-after-statement warnings.

2008-11-29T21:20:47Z

This option is new in gcc-4, so do not activate it by default.

Fix lsatt command.

2008-03-29T11:42:54Z

Complete the afs callback conversion.

2008-03-24T23:18:01Z

This makes it possible for the callbacks to pass a partial result buffer through the command handler <-> callback socket. This removes a serious limitation of previous paraslash-0.3.x versions: As callbacks could not send data directly to the command handler they had to store the full command output in a buffer. This buffer was sent to the command handler after the callback returns. The problem with this approach is that it caused the callbacks to allocate large amounts of memory. If that amount exceeded what can be stored in a shared memory area (32MB on Linux), the command even failed. The fix consists of adding a max_size field and a max_size_handler function pointer to the para_buffer structure. Whenever para_printf() would need to allocate more memory than specified by max_size, it calls the max_size_handler which is supposed to send out the data. para_printf then prints the requested data into the old but now empty buffer. Almost all users set the max_size_handler to pass_buffer_as_shm(), a helper function implemented in afs.c that copies the buffer to a shared memory area and sends its identifier through the socket.

make send_callback_request() and friends take a result handler.

2008-03-24T14:20:28Z

This is a first step to overcome a design flaw in the afs callback code: The output of the commands is currently stored in an osl object that is copied to a shared memory area whose shmid is passed back to the command handler via the local socket. This method limits the size of the command output to the maximal size that can be stored in a shared memory area which is not enough to hold large outputs like that of ls -c. This patch allows the command handlers to pass a result handler function instead of an osl object. This result handler is called for each shared memory area that gets sent through the local socket. Further patches will change the callbacks so that they pass multiple result buffers instead of returning a single buffer. This has the additional advantage that partial command output produced by the callback can be sent even before the callback returns. This parital output is seen immediately by the command handler.