davidxu d2b97b9193 When a thread is blocked in direct write state, it only sets PIPE_DIRECTW ... flag but not PIPE_WANTW, but FIFO pipe code does not understand this internal state, when a FIFO peer reader closes the pipe, it wants to notify the writer, it checks PIPE_WANTW, if not set, it skips calling wakeup(), so blocked writer never noticed the case, but in general, the writer should return from the syscall with EPIPE error code and may get SIGPIPE signal. Setting the PIPE_WANTW fixed problem, or you can turn off direct write, it should fix the problem too. This bug is found by PR/170203. Another bug in FIFO pipe code is when peer closes the pipe, another end which is being blocked in select() or poll() is not notified, it missed to call pipeselwakeup(). Third problem is found in poll regression test, the existing code can not pass 6b,6c,6d tests, but FreeBSD-4 works. This commit does not fix the problem, I still need to study more to find the cause. PR: 170203 Tested by: Garrett Copper < yanegomi at gmail dot com >		2012-07-31 02:00:37 +00:00
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cd9660	Use NULL instead of 0 for pointers	2012-07-22 15:40:31 +00:00
coda	Replace the MNT_VNODE_FOREACH interface with MNT_VNODE_FOREACH_ALL.	2012-04-17 16:28:22 +00:00
deadfs	Add function vop_rename_fail(9) that performs needed cleanup for locks	2010-04-02 14:03:01 +00:00
devfs	Extend the KPI to lock and unlock f_offset member of struct file. It	2012-07-02 21:01:03 +00:00
ext2fs	Use NULL instead of 0 for pointers	2012-07-22 15:40:31 +00:00
fdescfs	Use NULL instead of 0	2012-03-13 10:04:13 +00:00
fifofs	When a thread is blocked in direct write state, it only sets PIPE_DIRECTW	2012-07-31 02:00:37 +00:00
hpfs	Use C99-style initialization for struct dirent in preparation for	2012-05-25 09:16:59 +00:00
msdosfs	Use NULL instead of 0 for pointers	2012-07-22 15:40:31 +00:00
nandfs	Catch a corner case where ssegs could be 0 and thus i would be 0 and	2012-05-28 16:33:58 +00:00
nfs	A problem with the NFSv4 server was reported by Andrew Leonard	2012-05-17 21:52:17 +00:00
nfsclient	Do not override an error from uiomove() with (non-)error result from	2012-07-02 09:53:08 +00:00
nfsserver	Fix two cases in the new NFS server where a tsleep() is	2012-05-12 22:20:55 +00:00
ntfs	Remove a check on MNTK_UPDATE that is not really necessary as it is	2012-07-10 00:23:25 +00:00
nullfs	Remove unused thread argument to vrecycle().	2012-04-23 14:10:34 +00:00
nwfs	Rename cache_lookup_times() to cache_lookup() and retire the old API and	2012-02-06 17:00:28 +00:00
portalfs	Use NULL instead of 0 for pointers	2012-07-22 15:40:31 +00:00
procfs	Add procfs to jail-mountable filesystems.	2012-02-29 00:30:18 +00:00
pseudofs	Apply inlined vn_vget_ino() algorithm for ".." lookup in pseudofs.	2012-03-05 11:38:02 +00:00
smbfs	Simply error handling by moving the allocation of np down to where it is	2012-07-16 22:07:29 +00:00
tmpfs	Remove unused thread argument to vrecycle().	2012-04-23 14:10:34 +00:00
udf	Use NULL instead of 0 for pointers	2012-07-22 15:40:31 +00:00
unionfs	Skip directory entries with zero inode number during traversal.	2012-05-16 10:44:09 +00:00