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File locking related bugfixes for v3.15 (pile #2)

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- fix for a long-standing bug in __break_lease that can cause soft lockups
 - renaming of file-private locks to "open file description" locks, and the
   command macros to more visually distinct names.
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Merge tag 'locks-v3.15-2' of git://git.samba.org/jlayton/linux

Pull file locking fixes from Jeff Layton:
 "File locking related bugfixes for v3.15 (pile #2)

   - fix for a long-standing bug in __break_lease that can cause soft
     lockups
   - renaming of file-private locks to "open file description" locks,
     and the command macros to more visually distinct names

  The fix for __break_lease is also in the pile of patches for which
  Bruce sent a pull request, but I assume that your merge procedure will
  handle that correctly.

  For the other patches, I don't like the fact that we need to rename
  this stuff at this late stage, but it should be settled now
  (hopefully)"

* tag 'locks-v3.15-2' of git://git.samba.org/jlayton/linux:
  locks: rename FL_FILE_PVT and IS_FILE_PVT to use "*_OFDLCK" instead
  locks: rename file-private locks to "open file description locks"
  locks: allow __break_lease to sleep even when break_time is 0
This commit is contained in:
Linus Torvalds 2014-04-25 12:40:32 -07:00
commit 625bba662c
7 changed files with 54 additions and 54 deletions
Download patch file Download diff file Expand all files Collapse all files

20
include/uapi/asm-generic/fcntl.h
View file

@ -133,20 +133,20 @@
#endif
/*
* fd "private" POSIX locks.
* Open File Description Locks
*
* Usually POSIX locks held by a process are released on *any* close and are
* Usually record locks held by a process are released on *any* close and are
* not inherited across a fork().
*
* These cmd values will set locks that conflict with normal POSIX locks, but
* are "owned" by the opened file, not the process. This means that they are
* inherited across fork() like BSD (flock) locks, and they are only released
* automatically when the last reference to the the open file against which
* they were acquired is put.
* These cmd values will set locks that conflict with process-associated
* record locks, but are "owned" by the open file description, not the
* process. This means that they are inherited across fork() like BSD (flock)
* locks, and they are only released automatically when the last reference to
* the the open file against which they were acquired is put.
*/
#define F_GETLKP 36
#define F_SETLKP 37
#define F_SETLKPW 38
#define F_OFD_GETLK 36
#define F_OFD_SETLK 37
#define F_OFD_SETLKW 38
#define F_OWNER_TID 0
#define F_OWNER_PID 1