10 Aug, 2010
2 commits
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Make sure we check the truncate constraints early on in ->setattr by adding
those checks to inode_change_ok. Also clean up and document inode_change_ok
to make this obvious.As a fallout we don't have to call inode_newsize_ok from simple_setsize and
simplify it down to a truncate_setsize which doesn't return an error. This
simplifies a lot of setattr implementations and means we use truncate_setsize
almost everywhere. Get rid of fat_setsize now that it's trivial and mark
ext2_setsize static to make the calling convention obvious.Keep the inode_newsize_ok in vmtruncate for now as all callers need an
audit for its removal anyway.Note: setattr code in ecryptfs doesn't call inode_change_ok at all and
needs a deeper audit, but that is left for later.Signed-off-by: Christoph Hellwig
Signed-off-by: Al Viro -
Replace inode_setattr with opencoded variants of it in all callers. This
moves the remaining call to vmtruncate into the filesystem methods where it
can be replaced with the proper truncate sequence.In a few cases it was obvious that we would never end up calling vmtruncate
so it was left out in the opencoded variant:spufs: explicitly checks for ATTR_SIZE earlier
btrfs,hugetlbfs,logfs,dlmfs: explicitly clears ATTR_SIZE earlier
ufs: contains an opencoded simple_seattr + truncate that sets the filesize just aboveIn addition to that ncpfs called inode_setattr with handcrafted iattrs,
which allowed to trim down the opencoded variant.Signed-off-by: Christoph Hellwig
Signed-off-by: Al Viro
28 May, 2010
1 commit
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Lots of filesystems calls vmtruncate despite not implementing the old
->truncate method. Switch them to use simple_setsize and add some
comments about the truncate code where it seems fitting.Signed-off-by: Christoph Hellwig
Signed-off-by: Nick Piggin
Signed-off-by: Al Viro
04 Mar, 2010
1 commit
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Signed-off-by: Al Viro
12 Jan, 2010
1 commit
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If ->follow_link handler return the error, it should decrement
nd->path refcnt.This patch fix it.
Signed-off-by: OGAWA Hirofumi
Signed-off-by: Steven Whitehouse
08 Jan, 2010
1 commit
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The rename code was taking a resource group lock in cases where
it wasn't actually needed, this caused problems if the rename
was resulting in an inode being unlinked. The patch ensures that
we only take the rgrp lock early if it is really needed.Signed-off-by: Steven Whitehouse
24 Sep, 2009
1 commit
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* remove asm/atomic.h inclusion from linux/utsname.h --
not needed after kref conversion
* remove linux/utsname.h inclusion from files which do not need itNOTE: it looks like fs/binfmt_elf.c do not need utsname.h, however
due to some personality stuff it _is_ needed -- cowardly leave ELF-related
headers and files alone.Signed-off-by: Alexey Dobriyan
Signed-off-by: Linus Torvalds
27 Aug, 2009
2 commits
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Use the more conventional name for the extended attribute
support code. Update all the places which care.Signed-off-by: Steven Whitehouse
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This has been on my list for some time. We need to change the way
in which we handle extended attributes to allow faster file creation
times (by reducing the number of transactions required) and the
extended attribute code is the main obstacle to this.In addition to that, the VFS provides a way to demultiplex the xattr
calls which we ought to be using, rather than rolling our own. This
patch changes the GFS2 code to use that VFS feature and as a result
the code shrinks by a couple of hundred lines or so, and becomes
easier to read.I'm planning on doing further clean up work in this area, but this
patch is a good start. The cleaned up code also uses the more usual
"xattr" shorthand, I plan to eliminate the use of "eattr" eventually
and in the mean time it serves as a flag as to which bits of the code
have been updated.Signed-off-by: Steven Whitehouse
24 Aug, 2009
1 commit
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Also a gfs2_glock_dq() is required here.
Signed-off-by: Roel Kluin
Signed-off-by: Steven Whitehouse
22 May, 2009
3 commits
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Another function which is only called from one ops_inode.c so
we move it and make it static.Signed-off-by: Steven Whitehouse
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Move gfs2_readlinki into ops_inode.c and make it static
Signed-off-by: Steven Whitehouse
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Move gfs2_rmdiri() into ops_inode.c and make it static.
Signed-off-by: Steven Whitehouse
15 Apr, 2009
1 commit
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In certain cases symlinks can appear to have zero size if a lookup
on the inode occurs within a certain (very short) time after the
symlink has been created. The symlink is correctly created on disk
but appears to have zero size when stat()ed. This patch closes the
race and prevents incorrect sizes appearing.Signed-off-by: Steven Whitehouse
24 Mar, 2009
1 commit
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This is the big patch that I've been working on for some time
now. There are many reasons for wanting to make this change
such as:
o Reducing overhead by eliminating duplicated fields between structures
o Simplifcation of the code (reduces the code size by a fair bit)
o The locking interface is now the DLM interface itself as proposed
some time ago.
o Fewer lookups of glocks when processing replies from the DLM
o Fewer memory allocations/deallocations for each glock
o Scope to do further optimisations in the future (but this patch is
more than big enough for now!)Please note that (a) this patch relates to the lock_dlm module and
not the DLM itself, that is still a separate module; and (b) that
we retain the ability to build GFS2 as a standalone single node
filesystem with out requiring the DLM.This patch needs a lot of testing, hence my keeping it I restarted
my -git tree after the last merge window. That way, this has the maximum
exposure before its merged. This is (modulo a few minor bug fixes) the
same patch that I've been posting on and off the the last three months
and its passed a number of different tests so far.Signed-off-by: Steven Whitehouse
05 Jan, 2009
5 commits
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The final field in gfs2_dinode_host was the i_flags field. Thats
renamed to i_diskflags in order to avoid confusion with the existing
inode flags, and moved into the inode proper at a suitable location
to avoid creating a "hole".At that point struct gfs2_dinode_host is no longer needed and as
promised (quite some time ago!) it can now be removed completely.Signed-off-by: Steven Whitehouse
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This patch moved the i_size field from the gfs2_dinode_host and
following the ext3 convention renames it i_disksize.Signed-off-by: Steven Whitehouse
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This moves the directory entry count into the proper inode.
Potentially we could get this to share the space used by
something else in the future, but this is one more step
on the way to removing the gfs2_dinode_host structure.Signed-off-by: Steven Whitehouse
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Move the contents of some headers which contained very
little into more sensible places, and remove the original
header files. This should make it easier to find things.Signed-off-by: Steven Whitehouse
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This patch implements the FIEMAP ioctl for GFS2. We can use the generic
code (aside from a lock order issue, solved as per Ted Tso's suggestion)
for which I've introduced a new variant of the generic function. We also
have one exception to deal with, namely stuffed files, so we do that
"by hand", setting all the required flags.This has been tested with a modified (I could only find an old version) of
Eric's test program, and appears to work correctly.This patch does not currently support FIEMAP of xattrs, but the plan is to add
that feature at some future point.Signed-off-by: Steven Whitehouse
Cc: Theodore Tso
Cc: Eric Sandeen
23 Oct, 2008
1 commit
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New flag: LOOKUP_EXCL. Set before doing the final step of pathname
resolution on the paths that have LOOKUP_CREATE and O_EXCL.Signed-off-by: Al Viro
27 Aug, 2008
1 commit
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This patch fixes a locking issue in the rename code by ensuring that we hold
the per sb rename lock over both directory and "other" renames which involve
different parent directories.At the same time, this moved the (only called from one place) function
gfs2_ok_to_move into the file that its called from, so we can mark it
static. This should make a code a bit easier to follow.Signed-off-by: Steven Whitehouse
Cc: Peter Staubach
13 Aug, 2008
1 commit
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This patch fixes a problem whereby simultaneous unlink, rmdir,
rename and link operations (e.g. rm -fR *) from multiple nodes
on the same GFS2 file system can cause kernel panics, hangs,
and/or memory corruption. It also gets rid of all the non-rgrp
calls to gfs2_glock_nq_m.Signed-off-by: Bob Peterson
Signed-off-by: Steven Whitehouse
27 Jul, 2008
2 commits
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Signed-off-by: Al Viro
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* kill nameidata * argument; map the 3 bits in ->flags anybody cares
about to new MAY_... ones and pass with the mask.
* kill redundant gfs2_iop_permission()
* sanitize ecryptfs_permission()
* fix remaining places where ->permission() instances might barf on new
MAY_... found in mask.The obvious next target in that direction is permission(9)
folded fix for nfs_permission() breakage from Miklos Szeredi
Signed-off-by: Al Viro
03 Jul, 2008
1 commit
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GFS2 calls permission() to verify permissions after locks on the files
have been taken.For this it's sufficient to call gfs2_permission() instead. This
results in the following changes:- IS_RDONLY() check is not performed
- IS_IMMUTABLE() check is not performed
- devcgroup_inode_permission() is not called
- security_inode_permission() is not calledIS_RDONLY() should be unnecessary anyway, as the per-mount read-only
flag should provide protection against read-only remounts during
operations. do_gfs2_set_flags() has been fixed to perform
mnt_want_write()/mnt_drop_write() to protect against remounting
read-only.IS_IMMUTABLE has been added to gfs2_permission()
Repeating the security checks seems to be pointless, as they don't
normally change, and if they do, it's independent of the filesystem
state.Signed-off-by: Miklos Szeredi
Signed-off-by: Steven Whitehouse
31 Mar, 2008
5 commits
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This patch streamlines the quota checking in the "no quota" case by
making the check inline in the calling function, thus reducing the
number of function calls. Eventually we might be able to remove the
checks from the gfs2_quota_lock() and gfs2_quota_check() functions, but
currently we can't as there are a very few places in the code which need
to call these functions directly still.Signed-off-by: Steven Whitehouse
Cc: Abhijith Das -
gfs2_alloc_get may fail so we have to check it to prevent
NULL pointer dereference.Signed-off-by: Cyrill Gorcunov
Signed-off-by: Steven Whitehouse -
struct inode_operations gfs2_dev_iops is always the same as gfs2_file_iops,
since Jan 2006, when GFS2 merged into mainstream kernel.So one of them could be removed.
Signed-off-by: Denis Cheng
Signed-off-by: Steven Whitehouse -
We've previously been using a "try lock" in readpage on the basis that
it would prevent deadlocks due to the inverted lock ordering (our normal
lock ordering is glock first and then page lock). Unfortunately tests
have shown that this isn't enough. If the glock has a demote request
queued such that run_queue() in the glock code tries to do a demote when
its called under readpage then it will try and write out all the dirty
pages which requires locking them. This then deadlocks with the page
locked by readpage.The solution is to always require two calls into readpage. The first
unlocks the page, gets the glock and returns AOP_TRUNCATED_PAGE, the
second does the actual readpage and unlocks the glock & page as
required.Signed-off-by: Steven Whitehouse
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The blocks counter is almost a duplicate of the i_blocks
field in the VFS inode. The only difference is that i_blocks
can be only 32bits long for 32bit arch without large single file
support. Since GFS2 doesn't handle the non-large single file
case (for 32 bit anyway) this adds a new config dependency on
64BIT || LSF. This has always been the case, however we've never
explicitly said so before.Even if we do add support for the non-LSF case, we will still
not require this field to be duplicated since we will not be
able to access oversized files anyway.So the net result of all this is that we shave 8 bytes from a gfs2_inode
and get our config deps correct.Signed-off-by: Steven Whitehouse
08 Feb, 2008
1 commit
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Convert instances of ERR_PTR(PTR_ERR(p)) to ERR_CAST(p) using:
perl -spi -e 's/ERR_PTR[(]PTR_ERR[(](.*)[)][)]/ERR_CAST(\1)/' `grep -rl 'ERR_PTR[(]*PTR_ERR' fs crypto net security`
Signed-off-by: David Howells
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
25 Jan, 2008
2 commits
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It is possible to reduce the size of GFS2 inodes by taking the i_alloc
structure out of the gfs2_inode. This patch allocates the i_alloc
structure whenever its needed, and frees it afterward. This decreases
the amount of low memory we use at the expense of requiring a memory
allocation for each page or partial page that we write. A quick test
with postmark shows that the overhead is not measurable and I also note
that OCFS2 use the same approach.In the future I'd like to solve the problem by shrinking down the size
of the members of the i_alloc structure, but for now, this reduces the
immediate problem of using too much low-memory on x86 and doesn't add
too much overhead.Signed-off-by: Steven Whitehouse
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This patch fixes a couple of problems which affected the execution of files
on GFS2. The first is that there was a corner case where inodes were not
always uptodate at the point at which permissions checks were being carried
out, this was resulting in refusal of execute permission, but only on the
first lookup, subsequent requests worked correctly. The second was a problem
relating to incorrect updating of file sizes which was introduced with the
write_begin/end code for GFS2 a little while back.Signed-off-by: Steven Whitehouse
Cc: Abhijith Das
10 Oct, 2007
3 commits
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This patch cleans up the code for writing journaled data into the log.
It also removes the need to allocate a small "tag" structure for each
block written into the log. Instead we just keep count of the outstanding
I/O so that we can be sure that its all been written at the correct time.
Another result of this patch is that a number of ll_rw_block() calls
have become submit_bh() calls, closing some races at the same time.Signed-off-by: Steven Whitehouse
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This patch corrects the lock ordering in unlink to be the same as
that in the rest of GFS2, i.e. parent -> child -> rgrp.Signed-off-by: Steven Whitehouse
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When looking at an unrelated problem, I noticed that nfsd does not
set nameidata pointer on create (ie nd is NULL). This should
cause an oops in some cases in which when NFSd is mounted over GFS2.Signed-off-by: Steve French
Signed-off-by: Steven Whitehouse
09 Jul, 2007
3 commits
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This should have been part of the NFS patch #1 but somehow I missed it
when packaging the patches. It is not a critical issue as the others (I
hope). RHEL 5.1 31.el5 kernel runs fine without this change.Our truncate code is chopped into two parts, one for vfs inode changes
(in vmtruncate()) and one of gfs inode (in gfs2_truncatei()). These two
operatons are, unfortunately, not atomic. So it could happens that
vmtruncate() succeeds (inode->i_size is changed) but gfs2_truncatei
fails (say kernel temporarily out of memory). This would leave gfs inode
i_di.di_size out of sync with vfs inode i_size. It will later confuse
gfs2_commit_write() if a write is issued. Last time I checked, it will
cause file corruption.Signed-off-by: S. Wendy Cheng
Signed-off-by: Steven Whitehouse -
A typo caused us to pass a NULL pointer when renaming directories. It
was accidentally introduced in: [GFS2] Clean up inode number handlingSigned-off-by: Steven Whitehouse
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This adds a nanosecond timestamp feature to the GFS2 filesystem. Due
to the way that the on-disk format works, older filesystems will just
appear to have this field set to zero. When mounted by an older version
of GFS2, the filesystem will simply ignore the extra fields so that
it will again appear to have whole second resolution, so that its
trivially backward compatible.Signed-off-by: Steven Whitehouse
