1. 23 Feb, 2011 3 commits
  2. 22 Feb, 2011 3 commits
  3. 21 Feb, 2011 1 commit
    • Tao Ma's avatar
      ocfs2: Little refactoring against ocfs2_iget. · 6218b90e
      Tao Ma authored
      
      
      ocfs2_iget is used to get/create inode. Only iget5_locked
      will give us an inode = NULL. So move this check ahead of
      ocfs2_read_locked_inode so that we don't need to check
      inode before we read and unlock inode. This is also helpful
      for trace event(see the next patch).
      Signed-off-by: default avatarTao Ma <boyu.mt@taobao.com>
      6218b90e
  4. 22 Feb, 2011 1 commit
  5. 21 Feb, 2011 1 commit
  6. 22 Feb, 2011 6 commits
  7. 21 Feb, 2011 1 commit
    • Tao Ma's avatar
      ocfs2: Remove mlog(0) from fs/ocfs2/localalloc.c · a04733d8
      Tao Ma authored
      
      
      This is the 2nd step to remove the debug info of DISK_ALLOC.
      
      So this patch removes all mlog(0,...) from localalloc.c and adds
      the corresponding tracepoints. Different mlogs have different
      solutions.
      1. Some are replaced with trace event directly.
      2. Some are replaced while some new parameters are added.
      3. Some are combined into one trace events.
      4. Some redundant mlogs are removed.
      Signed-off-by: default avatarTao Ma <boyu.mt@taobao.com>
      a04733d8
  8. 22 Feb, 2011 1 commit
    • Tao Ma's avatar
      ocfs2: Remove mlog(0) from fs/ocfs2/alloc.c · a09d09b8
      Tao Ma authored
      This is the first try of replacing debug mlog(0,...) to
      trace events. Wengang has did some work in his original
      patch
      http://oss.oracle.com/pipermail/ocfs2-devel/2009-November/005513.html
      
      
      But he didn't finished it.
      
      So this patch removes all mlog(0,...) from alloc.c and adds
      the corresponding trace events. Different mlogs have different
      solutions.
      1. Some are replaced with trace event directly.
      2. Some are replaced and some new parameters are added since
         I think we need to know the btree owner in that case.
      3. Some are combined into one trace events.
      4. Some redundant mlogs are removed.
      What's more, it defines some event classes so that we can use
      them later.
      
      Cc: Wengang Wang <wen.gang.wang@oracle.com>
      Signed-off-by: default avatarTao Ma <boyu.mt@taobao.com>
      a09d09b8
  9. 21 Feb, 2011 1 commit
  10. 07 Mar, 2011 1 commit
    • Tao Ma's avatar
      ocfs2: Remove EXIT from masklog. · c1e8d35e
      Tao Ma authored
      
      
      mlog_exit is used to record the exit status of a function.
      But because it is added in so many functions, if we enable it,
      the system logs get filled up quickly and cause too much I/O.
      So actually no one can open it for a production system or even
      for a test.
      
      This patch just try to remove it or change it. So:
      1. if all the error paths already use mlog_errno, it is just removed.
         Otherwise, it will be replaced by mlog_errno.
      2. if it is used to print some return value, it is replaced with
         mlog(0,...).
      mlog_exit_ptr is changed to mlog(0.
      All those mlog(0,...) will be replaced with trace events later.
      Signed-off-by: default avatarTao Ma <boyu.mt@taobao.com>
      c1e8d35e
  11. 21 Feb, 2011 1 commit
    • Tao Ma's avatar
      ocfs2: Remove ENTRY from masklog. · ef6b689b
      Tao Ma authored
      
      
      ENTRY is used to record the entry of a function.
      But because it is added in so many functions, if we enable it,
      the system logs get filled up quickly and cause too much I/O.
      So actually no one can open it for a production system or even
      for a test.
      
      So for mlog_entry_void, we just remove it.
      for mlog_entry(...), we replace it with mlog(0,...), and they
      will be replace by trace event later.
      Signed-off-by: default avatarTao Ma <boyu.mt@taobao.com>
      ef6b689b
  12. 15 Mar, 2011 20 commits
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 · 422e6c4b
      Linus Torvalds authored
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (57 commits)
        tidy the trailing symlinks traversal up
        Turn resolution of trailing symlinks iterative everywhere
        simplify link_path_walk() tail
        Make trailing symlink resolution in path_lookupat() iterative
        update nd->inode in __do_follow_link() instead of after do_follow_link()
        pull handling of one pathname component into a helper
        fs: allow AT_EMPTY_PATH in linkat(), limit that to CAP_DAC_READ_SEARCH
        Allow passing O_PATH descriptors via SCM_RIGHTS datagrams
        readlinkat(), fchownat() and fstatat() with empty relative pathnames
        Allow O_PATH for symlinks
        New kind of open files - "location only".
        ext4: Copy fs UUID to superblock
        ext3: Copy fs UUID to superblock.
        vfs: Export file system uuid via /proc/<pid>/mountinfo
        unistd.h: Add new syscalls numbers to asm-generic
        x86: Add new syscalls for x86_64
        x86: Add new syscalls for x86_32
        fs: Remove i_nlink check from file system link callback
        fs: Don't allow to create hardlink for deleted file
        vfs: Add open by file handle support
        ...
      422e6c4b
    • Trond Myklebust's avatar
      VFS: Fix the nfs sillyrename regression in kernel 2.6.38 · c83ce989
      Trond Myklebust authored
      
      
      The new vfs locking scheme introduced in 2.6.38 breaks NFS sillyrename
      because the latter relies on being able to determine the parent
      directory of the dentry in the ->iput() callback in order to send the
      appropriate unlink rpc call.
      
      Looking at the code that cares about races with dput(), there doesn't
      seem to be anything that specifically uses d_parent as a test for
      whether or not there is a race:
        - __d_lookup_rcu(), __d_lookup() all test for d_hashed() after d_parent
        - shrink_dcache_for_umount() is safe since nothing else can rearrange
          the dentries in that super block.
        - have_submount(), select_parent() and d_genocide() can test for a
          deletion if we set the DCACHE_DISCONNECTED flag when the dentry
          is removed from the parent's d_subdirs list.
      Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
      Cc: stable@kernel.org (2.6.38, needs commit c826cb7d
      
       "dcache.c:
      	create helper function for duplicated functionality" )
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      c83ce989
    • Linus Torvalds's avatar
      dcache.c: create helper function for duplicated functionality · c826cb7d
      Linus Torvalds authored
      
      
      This creates a helper function for he "try to ascend into the parent
      directory" case, which was written out in triplicate before.  With all
      the locking and subtle sequence number stuff, we really don't want to
      duplicate that kind of code.
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      c826cb7d
    • Al Viro's avatar
      tidy the trailing symlinks traversal up · 574197e0
      Al Viro authored
      
      
      * pull the handling of current->total_link_count into
      __do_follow_link()
      * put the common "do ->put_link() if needed and path_put() the link"
        stuff into a helper (put_link(nd, link, cookie))
      * rename __do_follow_link() to follow_link(), while we are at it
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      574197e0
    • Al Viro's avatar
      Turn resolution of trailing symlinks iterative everywhere · b356379a
      Al Viro authored
      
      
      The last remaining place (resolution of nested symlink) converted
      to the loop of the same kind we have in path_lookupat() and
      path_openat().
      
      Note that we still *do* have a recursion in pathname resolution;
      can't avoid it, really.  However, it's strictly for nested symlinks
      now - i.e. ones in the middle of a pathname.
      
      link_path_walk() has lost the tail now - it always walks everything
      except the last component.
      
      do_follow_link() renamed to nested_symlink() and moved down.
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      b356379a
    • Al Viro's avatar
      simplify link_path_walk() tail · ce052544
      Al Viro authored
      
      
      Now that link_path_walk() is called without LOOKUP_PARENT
      only from do_follow_link(), we can simplify the checks in
      last component handling.  First of all, checking if we'd
      arrived to a directory is not needed - the caller will check
      it anyway.  And LOOKUP_FOLLOW is guaranteed to be there,
      since we only get to that place with nd->depth > 0.
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      ce052544
    • Al Viro's avatar
      Make trailing symlink resolution in path_lookupat() iterative · bd92d7fe
      Al Viro authored
      
      
      Now the only caller of link_path_walk() that does *not* pass
      LOOKUP_PARENT is do_follow_link()
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      bd92d7fe
    • Al Viro's avatar
      update nd->inode in __do_follow_link() instead of after do_follow_link() · b21041d0
      Al Viro authored
      
      
      ... and note that we only need to do it for LAST_BIND symlinks
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      b21041d0
    • Al Viro's avatar
      pull handling of one pathname component into a helper · ce57dfc1
      Al Viro authored
      
      
      new helper: walk_component().  Handles everything except symlinks;
      returns negative on error, 0 on success and 1 on symlinks we decided
      to follow.  Drops out of RCU mode on such symlinks.
      
      link_path_walk() and do_last() switched to using that.
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      ce57dfc1
    • Aneesh Kumar K.V's avatar
      fs: allow AT_EMPTY_PATH in linkat(), limit that to CAP_DAC_READ_SEARCH · 11a7b371
      Aneesh Kumar K.V authored
      
      
      We don't want to allow creation of private hardlinks by different application
      using the fd passed to them via SCM_RIGHTS. So limit the null relative name
      usage in linkat syscall to CAP_DAC_READ_SEARCH
      Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
      11a7b371
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://xenbits.xen.org/people/sstabellini/linux-pvhvm · 76ca0783
      Linus Torvalds authored
      * 'for-linus' of git://xenbits.xen.org/people/sstabellini/linux-pvhvm:
        xen: suspend: remove xen_hvm_suspend
        xen: suspend: pull pre/post suspend hooks out into suspend_info
        xen: suspend: move arch specific pre/post suspend hooks into generic hooks
        xen: suspend: refactor non-arch specific pre/post suspend hooks
        xen: suspend: add "arch" to pre/post suspend hooks
        xen: suspend: pass extra hypercall argument via suspend_info struct
        xen: suspend: refactor cancellation flag into a structure
        xen: suspend: use HYPERVISOR_suspend for PVHVM case instead of open coding
        xen: switch to new schedop hypercall by default.
        xen: use new schedop interface for suspend
        xen: do not respond to unknown xenstore control requests
        xen: fix compile issue if XEN is enabled but XEN_PVHVM is disabled
        xen: PV on HVM: support PV spinlocks and IPIs
        xen: make the ballon driver work for hvm domains
        xen-blkfront: handle Xen major numbers other than XENVBD
        xen: do not use xen_info on HVM, set pv_info name to "Xen HVM"
        xen: no need to delay xen_setup_shutdown_event for hvm guests anymore
      76ca0783
    • Linus Torvalds's avatar
      Merge branches 'stable/ia64', 'stable/blkfront-cleanup' and 'stable/cleanup'... · 27d2a8b9
      Linus Torvalds authored
      Merge branches 'stable/ia64', 'stable/blkfront-cleanup' and 'stable/cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
      
      * 'stable/ia64' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
        xen: ia64 build broken due to "xen: switch to new schedop hypercall by default."
      
      * 'stable/blkfront-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
        xen: Union the blkif_request request specific fields
      
      * 'stable/cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
        xen: annotate functions which only call into __init at start of day
        xen p2m: annotate variable which appears unused
        xen: events: mark cpu_evtchn_mask_p as __refdata
      27d2a8b9
    • Linus Torvalds's avatar
      Merge branch 'stable/irq.cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen · 010b8f4e
      Linus Torvalds authored
      * 'stable/irq.cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
        xen: events: remove dom0 specific xen_create_msi_irq
        xen: events: use xen_bind_pirq_msi_to_irq from xen_create_msi_irq
        xen: events: push set_irq_msi down into xen_create_msi_irq
        xen: events: update pirq_to_irq in xen_create_msi_irq
        xen: events: refactor xen_create_msi_irq slightly
        xen: events: separate MSI PIRQ allocation from PIRQ binding to IRQ
        xen: events: assume PHYSDEVOP_get_free_pirq exists
        xen: pci: collapse apic_register_gsi_xen_hvm and xen_hvm_register_pirq
        xen: events: return irq from xen_allocate_pirq_msi
        xen: events: drop XEN_ALLOC_IRQ flag to xen_allocate_pirq_msi
        xen: events: do not leak IRQ from xen_allocate_pirq_msi when no pirq available.
        xen: pci: only define xen_initdom_setup_msi_irqs if CONFIG_XEN_DOM0
      010b8f4e
    • Linus Torvalds's avatar
      Merge branches 'stable/irq.rework' and 'stable/pcifront-fixes' of... · 397fae08
      Linus Torvalds authored
      Merge branches 'stable/irq.rework' and 'stable/pcifront-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
      
      * 'stable/irq.rework' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
        xen/irq: Cleanup up the pirq_to_irq for DomU PV PCI passthrough guests as well.
        xen: Use IRQF_FORCE_RESUME
        xen/timer: Missing IRQF_NO_SUSPEND in timer code broke suspend.
        xen: Fix compile error introduced by "switch to new irq_chip functions"
        xen: Switch to new irq_chip functions
        xen: Remove stale irq_chip.end
        xen: events: do not free legacy IRQs
        xen: events: allocate GSIs and dynamic IRQs from separate IRQ ranges.
        xen: events: add xen_allocate_irq_{dynamic, gsi} and xen_free_irq
        xen:events: move find_unbound_irq inside CONFIG_PCI_MSI
        xen: handled remapped IRQs when enabling a pcifront PCI device.
        genirq: Add IRQF_FORCE_RESUME
      
      * 'stable/pcifront-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
        pci/xen: When free-ing MSI-X/MSI irq->desc also use generic code.
        pci/xen: Cleanup: convert int** to int[]
        pci/xen: Use xen_allocate_pirq_msi instead of xen_allocate_pirq
        xen-pcifront: Sanity check the MSI/MSI-X values
        xen-pcifront: don't use flush_scheduled_work()
      397fae08
    • Linus Torvalds's avatar
      Merge branches 'stable/p2m-identity.v4.9.1' and 'stable/e820' of... · c7146dd0
      Linus Torvalds authored
      Merge branches 'stable/p2m-identity.v4.9.1' and 'stable/e820' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
      
      * 'stable/p2m-identity.v4.9.1' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
        xen/m2p: Check whether the MFN has IDENTITY_FRAME bit set..
        xen/m2p: No need to catch exceptions when we know that there is no RAM
        xen/debug: WARN_ON when identity PFN has no _PAGE_IOMAP flag set.
        xen/debugfs: Add 'p2m' file for printing out the P2M layout.
        xen/setup: Set identity mapping for non-RAM E820 and E820 gaps.
        xen/mmu: WARN_ON when racing to swap middle leaf.
        xen/mmu: Set _PAGE_IOMAP if PFN is an identity PFN.
        xen/mmu: Add the notion of identity (1-1) mapping.
        xen: Mark all initial reserved pages for the balloon as INVALID_P2M_ENTRY.
      
      * 'stable/e820' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
        xen/e820: Don't mark balloon memory as E820_UNUSABLE when running as guest and fix overflow.
        xen/setup: Inhibit resource API from using System RAM E820 gaps as PCI mem gaps.
      c7146dd0
    • Al Viro's avatar
      Allow passing O_PATH descriptors via SCM_RIGHTS datagrams · 326be7b4
      Al Viro authored
      
      
      Just need to make sure that AF_UNIX garbage collector won't
      confuse O_PATHed socket on filesystem for real AF_UNIX opened
      socket.
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      326be7b4
    • Al Viro's avatar
      readlinkat(), fchownat() and fstatat() with empty relative pathnames · 65cfc672
      Al Viro authored
      
      
      For readlinkat() we simply allow empty pathname; it will fail unless
      we have dfd equal to O_PATH-opened symlink, so we are outside of
      POSIX scope here.  For fchownat() and fstatat() we allow AT_EMPTY_PATH;
      let the caller explicitly ask for such behaviour.
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      65cfc672
    • Al Viro's avatar
      Allow O_PATH for symlinks · bcda7652
      Al Viro authored
      
      
      At that point we can't do almost nothing with them.  They can be opened
      with O_PATH, we can manipulate such descriptors with dup(), etc. and
      we can see them in /proc/*/{fd,fdinfo}/*.
      
      We can't (and won't be able to) follow /proc/*/fd/* symlinks for those;
      there's simply not enough information for pathname resolution to go on
      from such point - to resolve a symlink we need to know which directory
      does it live in.
      
      We will be able to do useful things with them after the next commit, though -
      readlinkat() and fchownat() will be possible to use with dfd being an
      O_PATH-opened symlink and empty relative pathname.  Combined with
      open_by_handle() it'll give us a way to do realink-by-handle and
      lchown-by-handle without messing with more redundant syscalls.
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      bcda7652
    • Al Viro's avatar
      New kind of open files - "location only". · 1abf0c71
      Al Viro authored
      
      
      New flag for open(2) - O_PATH.  Semantics:
      	* pathname is resolved, but the file itself is _NOT_ opened
      as far as filesystem is concerned.
      	* almost all operations on the resulting descriptors shall
      fail with -EBADF.  Exceptions are:
      	1) operations on descriptors themselves (i.e.
      		close(), dup(), dup2(), dup3(), fcntl(fd, F_DUPFD),
      		fcntl(fd, F_DUPFD_CLOEXEC, ...), fcntl(fd, F_GETFD),
      		fcntl(fd, F_SETFD, ...))
      	2) fcntl(fd, F_GETFL), for a common non-destructive way to
      		check if descriptor is open
      	3) "dfd" arguments of ...at(2) syscalls, i.e. the starting
      		points of pathname resolution
      	* closing such descriptor does *NOT* affect dnotify or
      posix locks.
      	* permissions are checked as usual along the way to file;
      no permission checks are applied to the file itself.  Of course,
      giving such thing to syscall will result in permission checks (at
      the moment it means checking that starting point of ....at() is
      a directory and caller has exec permissions on it).
      
      fget() and fget_light() return NULL on such descriptors; use of
      fget_raw() and fget_raw_light() is needed to get them.  That protects
      existing code from dealing with those things.
      
      There are two things still missing (they come in the next commits):
      one is handling of symlinks (right now we refuse to open them that
      way; see the next commit for semantics related to those) and another
      is descriptor passing via SCM_RIGHTS datagrams.
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      1abf0c71
    • Aneesh Kumar K.V's avatar
      ext4: Copy fs UUID to superblock · f2fa2ffc
      Aneesh Kumar K.V authored
      
      
      File system UUID is made available to application
      via  /proc/<pid>/mountinfo
      Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      f2fa2ffc