1. 18 Mar, 2004 19 commits
    • Alexander Viro's avatar
      [PATCH] add file_accessed() helper · 5f9861a6
      Alexander Viro authored
      New inlined helper - file_accessed(file) (wrapper for update_atime())
      5f9861a6
    • Alexander Viro's avatar
      [PATCH] missing check in do_add_mount() · d2a4a177
      Alexander Viro authored
      Make sure that we don't end up with symlink mounted over something
      
      (mount --bind is safe since we use LOOKUP_FOLLOW in pathname resolution
      there).
      d2a4a177
    • David S. Miller's avatar
      Merge nuts.davemloft.net:/disk1/BK/sparcwork-2.6 · 4143a413
      David S. Miller authored
      into nuts.davemloft.net:/disk1/BK/sparc-2.6
      4143a413
    • William Lee Irwin III's avatar
      bce3bd85
    • Jason Wever's avatar
    • David Howells's avatar
      [PATCH] FD_CLOEXEC fcntl cleanup · dc5178fa
      David Howells authored
      This fixes a minor problem with fcntl.
      
      get_close_on_exec() uses FD_ISSET() to determine the fd state, but this
      is not guaranteed to be either 0 of FD_CLOEXEC.  Make that explicit.
      
      Also, the argument of set_close_on_exec() is being AND'ed with the
      literal constant 1.  Make it use an explicit FD_CLOEXEC test.
      dc5178fa
    • Linus Torvalds's avatar
      Make ppc64 __FD_ISSET() return a proper boolean return value. · 437117bf
      Linus Torvalds authored
      (The broken macro only triggers for non-gcc compiles, but
      still..)
      437117bf
    • Bartlomiej Zolnierkiewicz's avatar
      [PATCH] add missing MODULE_DEVICE_TABLE() to IDE PCI drivers · 2b34fa5f
      Bartlomiej Zolnierkiewicz authored
      Original patch from Hannes Reinecke <hare@suse.de>.
      
      This is required to have modular IDE drivers announce themselves
      properly in modules.pcimap.
      2b34fa5f
    • Linus Torvalds's avatar
      1ddcf61a
    • Rusty Russell's avatar
      [PATCH] Implement migrate_all_tasks · ae01bd8f
      Rusty Russell authored
      Implement migrate_all_tasks() which moves tasks off cpu while machine
      is stopped.
      ae01bd8f
    • Rusty Russell's avatar
      [PATCH] Export cpu notifiers and do locking. · 30d67695
      Rusty Russell authored
      The registration and unregistration of CPU notifiers should be done
      under the cpucontrol sem.  They should also be exported.
      30d67695
    • Alexander Viro's avatar
      [PATCH] hpfs: general cleanup · ea747b67
      Alexander Viro authored
      include files moved to fs/hpfs/, gratitious #include removed, stuff that
      doesn't have to be global made static, misindented chunk of
      hpfs_readdir() put in place, etc.
      ea747b67
    • Alexander Viro's avatar
      [PATCH] hpfs: fix locking scheme · 9c96c8be
      Alexander Viro authored
      	Fixed the locking scheme.  The need of extra locking was caused by
      the fact that hpfs_write_inode() must update directory entry; since HPFS
      directories are implemented as b-trees, we must provide protection both
      against rename() (to make sure that we update the entry in right directory)
      and against rebalancing of the parent.
      
      	Old scheme had both deadlocks and races - to start with, we had no
      protection against rename()/unlink()/rmdir(), since (a) locking parent
      was done without any warranties that it will remain our parent and (b)
      check that we still have a directory entry (== have positive nlink) was
      done before we tried to lock the parent.  Moreover, iget serialization
      killed two steps ago gave immediate deadlocks if iget() of parent had
      triggered another hpfs_write_inode().
      
      	New scheme introduces another per-inode semaphore (hpfs-only,
      obviously) protecting the reference to parent.  It's taken on
      rename/rmdir/unlink victims and inode being moved by rename.  Old semaphores
      are taken only on parent(s) and only after we grab one(s) of the new kind.
      hpfs_write_inode() gets the new semaphore on our inode, checks nlink and
      if it's non-zero grabs parent and takes the old semaphore on it.
      
      	Order among the semaphores of the same kind is arbitrary - the only
      function that might take more than one of the same kind is hpfs_rename()
      and it's serialized by VFS.
      
      	We might get away with only one semaphore, but then the ordering
      issues would bite us big way - we would have to make sure that child is
      always locked before parent (hpfs_write_inode() leaves no other choice)
      and while that's easy to do for almost all operations, rename() is a bitch -
      as always.  And per-superblock rwsem giving rename() vs. write_inode()
      exclusion on hpfs would make the entire thing too baroque for my taste.
      	->readdir() takes no locks at all (protection against directory
      modifications is provided by VFS exclusion), ditto for ->lookup().
      	->llseek() on directories switched to use of (VFS) ->i_sem, so
      it's safe from directory modifications and ->readdir() is safe from it -
      no hpfs locks are needed here.
      9c96c8be
    • Alexander Viro's avatar
      [PATCH] hpfs: deadlock fixes · d9013aae
      Alexander Viro authored
      We used to have GFP_KERNEL kmalloc() done by the code that held hpfs
      lock on directory.  That could trigger a call of hpfs_write_inode() and
      deadlock; fixed by switch to GFP_NOFS.  Same for hpfs inodes themselves
      - hpfs_write_inode() calls iget() and that could trigger both the
      deadlocks (avoidable with very baroque locking scheme) and stack
      overflows (unavoidable unless we kill potential recursion here).
      d9013aae
    • Alexander Viro's avatar
      [PATCH] hpfs: hpfs iget locking cleanup · 772fd530
      Alexander Viro authored
      Killed the nightmares in hpfs iget handling.  Since in some (fairly
      frequent) cases hpfs_read_inode() could avoid any IO (basically, lookup
      hitting a native HPFS regular file can get all data from directory
      entry) hpfs had a flag passed to that sucker.  Said flag had been
      protected by a semaphore lookalike made out of spit and duct-tape and
      callers of iget looked like
      
      	hpfs_lock_iget(sb, flag);
      	result = iget(sb, ino);
      	hpfs_unlock_iget(sb);
      
      Since now we are calling hpfs_read_inode() directly (note that calling
      it without hpfs_lock_iget() would simply break) we can forget all that
      crap and get rid of the flag - caller knows what it wants to call.
      
      BTW, that had killed one of the last sleep_on() users in fs/*/*.
      772fd530
    • Alexander Viro's avatar
      [PATCH] hpfs: hpfs iget locking cleanup preparation · b5b83bae
      Alexander Viro authored
      	Preparation to hpfs iget locking cleanup - remaining iget() callers
      replaced with explicit iget_locked() + call hpfs_read_inode()/unlock_new_inode()
      if inode is new.
      b5b83bae
    • Alexander Viro's avatar
      [PATCH] hpfs: new/read/write_inode() cleanups · eb3a6d15
      Alexander Viro authored
      	1) common initialization for all paths in hpfs_read_inode() taken into
      a separate helper (hpfs_init_inode())
      	2) hpfs mkdir(),create(),mknod() and symlink() do not bother with
      iget() anymore - they call new_inode(), do initializations and insert new
      inode into icache.  Handling of OOM failures cleaned up - if we can't
      allocate in-core inode, bail instead of corrupting the filesystem.
      Allocating in-core inode early also avoids one of the deadlocks here
      (hpfs_write_inode() from memory pressure by kmem_cache_alloc() could
      deadlock on attempt to lock our directory).
      	3) hpfs_write_inode() marks the inode dirty again in case if it
      fails to iget() its parent directory.  Again, OOM could trigger fs corruption
      here.
      eb3a6d15
    • Alexander Viro's avatar
      [PATCH] hpfs: clean up lock ordering · fde48def
      Alexander Viro authored
      	hpfs_{lock,unlock}_{2,3}inodes() killed; all places that take more than
      one lock have ->i_sem held by VFS on all inodes involved and all hpfs per-inode
      locks are of the same type.  IOW, we can replace these guys with multiple
      hpfs_lock_inode() - order doesn't matter here.
      fde48def
    • Alexander Viro's avatar
      [PATCH] hpfs: namei.c failure case cleanups · c4357dfe
      Alexander Viro authored
      Failure exits in hpfs/namei.c merged and cleaned up.
      c4357dfe
  2. 17 Mar, 2004 21 commits