Commit Graph

19 Commits

Author SHA1 Message Date
thorpej 80cc38a1af Fix a partial construction problem that can cause race conditions
between creation of a file descriptor and close(2) when using kernel
assisted threads.  What we do is stick descriptors in the table, but
mark them as "larval".  This causes essentially everything to treat
it as a non-existent descriptor, except for fdalloc(), which sees a
filled slot so that it won't (incorrectly) allocate it again.  When
a descriptor is fully constructed, the code that has constructed it
marks it as "mature" (which actually clears the "larval" flag), and
things continue to work as normal.

While here, gather all the code that gets a descriptor from the table
into a fd_getfile() function, and call it, rather than having the
same (sometimes incorrect) code copied all over the place.
2001-06-14 20:32:41 +00:00
mrg 6a89288a37 use _KERNEL_OPT. 2001-05-30 11:37:21 +00:00
jdolecek b6d1d4db02 Change the first arg to fileops fo_stat routine to struct file *, adjust
callers and appropriate routines to cope. This makes fo_stat more
consistent with rest of fileops routines and also makes the fo_stat
match FreeBSD as an added bonus.
Discussed with Luke Mewburn on tech-kern@.
2001-04-09 10:22:00 +00:00
jdolecek 16b1272b3f Add new 'stat' fileop and call the stat function via f_ops rather
than directly.
For compat syscalls, also add necessary FILE_USE()/FILE_UNUSE().
Now that soo_stat() gets a proc arg, pass it on to usrreq function.
2001-04-07 09:00:57 +00:00
jdolecek 73f3cd8c7e LKMify 2000-11-29 21:51:49 +00:00
pk 9c601e5c64 lstat: since namei() returns an error (EISDIR) if there is no parent to lock,
retry the lookup without LOCKPARENT if that happens. This is safe, since
need to have LOCKPARENT only if the vnode is of type VLNK.
2000-07-26 11:43:07 +00:00
augustss a82aeb5508 Kill register declarations. 2000-03-30 11:24:16 +00:00
thorpej e3669c3393 Add "use counting" to file entries. When closing a file, and it's reference
count is 0, wait for use count to drain before finishing the close.

This is necessary in order for multiple processes to safely share file
descriptor tables.
1999-05-05 20:01:01 +00:00
wrstuden eb10774f2b Explicitly mask mode returned in old stat structure to 16 bits. Also correct
comment (we're converting from a new to an old struct stat).
1999-03-30 00:13:57 +00:00
fvdl e5bc90f40c Merge with Lite2 + local changes 1998-03-01 02:20:01 +00:00
thorpej 00fa9be52f Include the UNION option header. 1998-02-19 00:35:26 +00:00
christos 537eb26ac2 add stat12 compatibility calls and rename ostat to stat43 1997-10-16 23:50:36 +00:00
fvdl 93b08eefc2 u_long -> off_t, I missed the big endian case. From Juergen Hannken-Illjes 1997-10-10 13:03:32 +00:00
fvdl 811fbe17b5 Add getdirentries backward compat syscall. Provide common function to
signal cookie overflow during emulated getdents and friends.
1997-10-10 01:46:59 +00:00
christos ca0d389297 PR/3701: Arne H. Juul: olstat can't stat "/", because it still pretended
that symlinks don't have inodes.
1997-06-06 19:36:31 +00:00
christos 6cbf515e30 Fix compiler warnings 1996-03-14 19:31:45 +00:00
mycroft 245f292fed Prefix names of system call implementation functions with `sys_'. 1995-10-07 06:25:19 +00:00
thorpej 7160dfc805 Make system calls conform to a standard prototype and bring those
prototypes into scope.
1995-09-19 21:57:36 +00:00
christos dcb2a50b2b - Extracted all compat routines from the kern directory and moved here.
- Created compat_util.c and compat_util.h to be used by the compatibility
  modules, so they don't duplicate the same code.
- Added prototypes to the stackgap allocation routines.
1995-06-24 20:15:55 +00:00