percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
Get rid of the transfer dquot operation - it is now always called from
the filesystem and if a filesystem really needs it's own (which none
currently does) it can just call into it's own routine directly.
Rename the now static low-level dquot_transfer helper to __dquot_transfer
and vfs_dq_transfer to dquot_transfer to have a consistent namespace,
and make the new dquot_transfer return a normal negative errno value
which all callers expect.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
sparse warns that:
drivers/staging/pohmelfs/inode.c:1797: warning: initialization from incompatible pointer type
so fix pohmelfs_write_inode() to have the expected parameters.
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Since pohmelfs isn't tied to a single block device, it needs to setup a
backing dev like nfs/btrfs/etc do.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
err_out_put is for when the netfs_trans_alloc() succeeded.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
- no one is calling wb_writeback and write_cache_pages with
wbc.nonblocking=1 any more
- lumpy pageout will want to do nonblocking writeback without the
congestion wait
So remove the congestion checks as suggested by Chris.
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Evgeniy Polyakov <zbr@ioremap.net>
Cc: Alex Elder <aelder@sgi.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Acked-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Use new helper __generic_file_aio_write(). Since the fs takes care of syncing
by itself afterwards, there are no more changes needed.
CC: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Jan Kara <jack@suse.cz>
This adds two new exported functions:
- writeback_inodes_sb(), which only attempts to writeback dirty inodes on
this super_block, for WB_SYNC_NONE writeout.
- sync_inodes_sb(), which writes out all dirty inodes on this super_block
and also waits for the IO to complete.
Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
The C99 specification states in section 6.11.5:
The placement of a storage-class specifier other than at the beginning
of the declaration specifiers in a declaration is an obsolescent
feature.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
`!' has a higher precedence than `&' and `|' has a higher precedence than `?'
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/staging/pohmelfs/path_entry.c: In function
'pohmelfs_construct_path_string':
drivers/staging/pohmelfs/path_entry.c:48: error: dereferencing pointer to incomplete type
drivers/staging/pohmelfs/path_entry.c:49: error: dereferencing pointer to incomplete type
drivers/staging/pohmelfs/path_entry.c:50: error: dereferencing pointer to incomplete type
drivers/staging/pohmelfs/path_entry.c: In function 'pohmelfs_path_length':
drivers/staging/pohmelfs/path_entry.c:95: error: dereferencing pointer to incomplete type
drivers/staging/pohmelfs/path_entry.c:96: error: dereferencing pointer to incomplete type
drivers/staging/pohmelfs/path_entry.c:97: error: dereferencing pointer to incomplete type
Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
pohmelfs wants to use CONNECTOR, so it selects CONNECTOR,
but when CONFIG_NET is not enabled, connector.c will not build,
since select does not follow the dependency chain.
Selecting NET is not a good idea, since that would build lots
of code that someone seemingly didn't want to build/store
and kconfig shouldn't do that behind someone's back.
pohmelfs should depend on NET since it uses network interfaces.
pohmelfs also uses CRYTPO and selects 2 cipher symbols, but
it should also select the top-level CRYPTO symbol since
kconfig dependency chains are not followed.
(found by inspection)
This allows the POHMELFS_CRYPTO option to depend only on
POHMELFS and makes the kconfig menu align properly.
Also fix minor typos & line lengths in kconfig help text.
Drop CONFIG_* in kconfig symbols in Kconfig file.
connector.c:(.text+0x46003): undefined reference to `kfree_skb'
connector.c:(.text+0x460a6): undefined reference to `kfree_skb'
connector.c:(.text+0x4612b): undefined reference to `kfree_skb'
(.text+0x4624f): undefined reference to `netlink_has_listeners'
(.text+0x4629b): undefined reference to `__alloc_skb'
(.text+0x462ea): undefined reference to `kfree_skb'
(.text+0x46308): undefined reference to `skb_put'
(.text+0x46385): undefined reference to `netlink_broadcast'
(.text+0x7b574): undefined reference to `sock_release'
(.text+0x7b8dd): undefined reference to `sock_create'
(.text+0x7b984): undefined reference to `kernel_connect'
(.text+0x7ba4c): undefined reference to `sock_release'
net.c:(.text+0x7bda4): undefined reference to `kernel_recvmsg'
(.text+0x7ef42): undefined reference to `kernel_sendmsg'
(.text+0x7f057): undefined reference to `kernel_sendpage'
(.text+0x7f1e8): undefined reference to `kernel_sendmsg'
connector.c:(.devinit.text+0x5b): undefined reference to `init_net'
connector.c:(.devinit.text+0x60): undefined reference to `netlink_kernel_create'
connector.c:(.devinit.text+0xc9): undefined reference to `netlink_kernel_release'
connector.c:(.devexit.text+0x2c): undefined reference to `netlink_kernel_release'
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/staging/pohmelfs/inode.c:917: warning: format '%u' expects type 'unsigned int', but argument 4 has type 'size_t'
drivers/staging/pohmelfs/inode.c:1036: warning: format '%u' expects type 'unsigned int', but argument 7 has type 'size_t'
drivers/staging/pohmelfs/trans.c:164: warning: format '%u' expects type 'unsigned int', but argument 5 has type '__kernel_size_t'
drivers/staging/pohmelfs/trans.c:170: warning: format '%u' expects type 'unsigned int', but argument 7 has type '__kernel_size_t'
drivers/staging/pohmelfs/trans.c:517: warning: format '%u' expects type 'unsigned int', but argument 6 has type '__kernel_size_t'
drivers/staging/pohmelfs/trans.c:600: warning: format '%u' expects type 'unsigned int', but argument 6 has type '__kernel_size_t'
drivers/staging/pohmelfs/trans.c:610: warning: format '%u' expects type 'unsigned int', but argument 7 has type '__kernel_size_t'
Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: Frank Seidel <frank@f-seidel.de>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
on Sparc64:
drivers/staging/pohmelfs/net.c:33: error: implicit declaration of function 'vmalloc'
drivers/staging/pohmelfs/net.c:42: error: implicit declaration of function 'vfree'
Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch adds Kconfig and Makefile entries and exports to
VFS functions to be used by POHMELFS.
Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch implements transaction processing helpers
used to allocate/free/insert/remove and other operations
with the transctions.
Each transction is an object, which may embed multiple commands
completed atomically. When server fails the whole transaction will be
replied against it (or different server) later. This approach allows to
maintain high data integrity and do not desynchronize filesystem state
in case of network or server failures.
Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This is a main network processing patch. It includes
both low-level socket machinery, zero-copy sending helpers,
receiving and parsing callbacks and mainly logical
commands handlers.
POHMELFS uses async network approach, when every command
can be separated from its answer and received after some
time after the request during which another lots of commands
can be injected into the network and replies to them received.
With read operation balancing between multiple hosts it is possible
that operations will arrive out of order and this is handled
by the transaction mechanism described partially here.
Having a transaction to guard the set of logically compound operations
allows to send data without thinking about its status and using
zero-copy sending mechanism, since transaction will receive explicit
acks from the servers when they are completed.
This patch also contains header with network srtuctures, commands
and short comments on how they are used.
Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
POHMELFS utilizes writeback cache, which is built on top of MO(E)SI-like
coherency protocol. This patch includes its implementation and cache
object processing helpers (like allocation and completion callbacks).
POHMELFS uses scalable cached read/write locking. No additional requests
are performed if lock is granted to the filesystem. The same protocol
is used by the server to on-demand flushing of the client's cache (for
example when server wants to update local data).
Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This is the main patch which implements inode operations
(like reading and writing) and superblock processing
(filesystem registration, initial autoconfiguration
with the server like permissions, size of the exported
dir, amount of the objects created and so on).
POHMELFS relies on system's writeback cache mechanism
shown here, as long as cache coherency protocol described
later.
Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch implementes all supported directory operations
like directory reading, object lookup, creation, removal
and so on.
Currently object removal is not optimized at all.
Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
POHMELFS is able to encrypt the whole network channel or
attach the strong checksum to own packets to catch faulty media.
This patch implements crypto initialization, its autoconfiguration
and sync with the server.
Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch includes POHMELFS configuration interface based
on the netlink kernel connector. This interface allows to create
configuration groups in the kerenel indexed by mount ID option.
Each configuration group can include multiple servers to work
with and various operation parameters.
Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
