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2011-07-20switch vfs_path_lookup() to struct pathAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20kill lookup_create()Al Viro
folded into the only caller (kern_path_create()) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20make sure that nsproxy_cache is initialized early enoughAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20new helpers: kern_path_create/user_path_createAl Viro
combination of kern_path_parent() and lookup_create(). Does *not* expose struct nameidata to caller. Syscalls converted to that... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20kill LOOKUP_CONTINUEAl Viro
LOOKUP_PARENT is equivalent to it now Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20nfs_open_context doesn't need struct path eitherAl Viro
just dentry, please... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20kill IPERM_FLAG_RCUAl Viro
not used anymore Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20->permission() sanitizing: don't pass flags to exec_permission()Al Viro
pass mask instead; kill security_inode_exec_permission() since we can use security_inode_permission() instead. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20->permission() sanitizing: don't pass flags to ->inode_permission()Al Viro
pass that via mask instead. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20->permission() sanitizing: don't pass flags to ->permission()Al Viro
not used by the instances anymore. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20->permission() sanitizing: don't pass flags to generic_permission()Al Viro
redundant; all callers get it duplicated in mask & MAY_NOT_BLOCK and none of them removes that bit. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20->permission() sanitizing: don't pass flags to ->check_acl()Al Viro
not used in the instances anymore. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20->permission() sanitizing: MAY_NOT_BLOCKAl Viro
Duplicate the flags argument into mask bitmap. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20kill check_acl callback of generic_permission()Al Viro
its value depends only on inode and does not change; we might as well store it in ->i_op->check_acl and be done with that. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20lockless get_write_access/deny_write_accessAl Viro
new helpers: atomic_inc_unless_negative()/atomic_dec_unless_positive() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20kill file_permission() completelyAl Viro
convert the last remaining caller to inode_permission() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20consolidate BINPRM_FLAGS_ENFORCE_NONDUMP handlingAl Viro
new helper: would_dump(bprm, file). Checks if we are allowed to read the file and if we are not - sets ENFORCE_NODUMP. Exported, used in places that previously open-coded the same logics. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20new helper: iterate_supers_type()Al Viro
Call the given function for all superblocks of given type. Function gets a superblock (with s_umount locked shared) and (void *) argument supplied by caller of iterator. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20fs: add a DCACHE_NEED_LOOKUP flag for d_flagsJosef Bacik
Btrfs (and I'd venture most other fs's) stores its indexes in nice disk order for readdir, but unfortunately in the case of anything that stats the files in order that readdir spits back (like oh say ls) that means we still have to do the normal lookup of the file, which means looking up our other index and then looking up the inode. What I want is a way to create dummy dentries when we find them in readdir so that when ls or anything else subsequently does a stat(), we already have the location information in the dentry and can go straight to the inode itself. The lookup stuff just assumes that if it finds a dentry it is done, it doesn't perform a lookup. So add a DCACHE_NEED_LOOKUP flag so that the lookup code knows it still needs to run i_op->lookup() on the parent to get the inode for the dentry. I have tested this with btrfs and I went from something that looks like this http://people.redhat.com/jwhiter/ls-noreada.png To this http://people.redhat.com/jwhiter/ls-good.png Thats a savings of 1300 seconds, or 22 minutes. That is a significant savings. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-19rcu: Fix RCU_BOOST race handling current->rcu_read_unlock_specialPaul E. McKenney
The RCU_BOOST commits for TREE_PREEMPT_RCU introduced an other-task write to a new RCU_READ_UNLOCK_BOOSTED bit in the task_struct structure's ->rcu_read_unlock_special field, but, as noted by Steven Rostedt, without correctly synchronizing all accesses to ->rcu_read_unlock_special. This could result in bits in ->rcu_read_unlock_special being spuriously set and cleared due to conflicting accesses, which in turn could result in deadlocks between the rcu_node structure's ->lock and the scheduler's rq and pi locks. These deadlocks would result from RCU incorrectly believing that the just-ended RCU read-side critical section had been preempted and/or boosted. If that RCU read-side critical section was executed with either rq or pi locks held, RCU's ensuing (incorrect) calls to the scheduler would cause the scheduler to attempt to once again acquire the rq and pi locks, resulting in deadlock. More complex deadlock cycles are also possible, involving multiple rq and pi locks as well as locks from multiple rcu_node structures. This commit fixes synchronization by creating ->rcu_boosted field in task_struct that is accessed and modified only when holding the ->lock in the rcu_node structure on which the task is queued (on that rcu_node structure's ->blkd_tasks list). This results in tasks accessing only their own current->rcu_read_unlock_special fields, making unsynchronized access once again legal, and keeping the rcu_read_unlock() fastpath free of atomic instructions and memory barriers. The reason that the rcu_read_unlock() fastpath does not need to access the new current->rcu_boosted field is that this new field cannot be non-zero unless the RCU_READ_UNLOCK_BLOCKED bit is set in the current->rcu_read_unlock_special field. Therefore, rcu_read_unlock() need only test current->rcu_read_unlock_special: if that is zero, then current->rcu_boosted must also be zero. This bug does not affect TINY_PREEMPT_RCU because this implementation of RCU accesses current->rcu_read_unlock_special with irqs disabled, thus preventing races on the !SMP systems that TINY_PREEMPT_RCU runs on. Maybe-reported-by: Dave Jones <davej@redhat.com> Maybe-reported-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Reported-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
2011-07-19bcma: allow enabling PLLRafał Miłecki
Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-19bcma: allow setting FAST clockmode for a coreRafał Miłecki
Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-19bcma: trivial: add helpers for masking/settingRafał Miłecki
Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-19bcma: move define of BCMA_CLKCTLST registerRafał Miłecki
Recent experiments have shown many cores share 0x1E0 register used for clock management. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-19cfg80211: allow userspace to control supported rates in scanJohannes Berg
Some P2P scans are not allowed to advertise 11b rates, but that is a rather special case so instead of having that, allow userspace to request the rate sets (per band) that are advertised in scan probe request frames. Since it's needed in two places now, factor out some common code parsing a rate array. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-19bcma: define IO status registerRafał Miłecki
Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-19ieee80211: add few wmm tspec valuesKalle Valo
These are needed by ath6kl for parsing tspec status from an IE. Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-19bcma: handle alternative SPROM locationRafał Miłecki
Some cards do not use additional 0x30 offset for SPROM location. We do not know the real condition for it yet, make it BCM4331 specific for now. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-19netfilter: nfnetlink_queue: batch verdict supportFlorian Westphal
Introduces a new nfnetlink type that applies a given verdict to all queued packets with an id <= the id in the verdict message. If a mark is provided it is applied to all matched packets. This reduces the number of verdicts that have to be sent. Applications that make use of this feature need to maintain a timeout to send a batchverdict periodically to avoid starvation. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Patrick McHardy <kaber@trash.net>
2011-07-18IB/mlx4: Use flow counters on IBoE portsOr Gerlitz
Allocate flow counter per Ethernet/IBoE port, and attach this counter to all the QPs created on that port. Based on patch by Eli Cohen <eli@mellanox.co.il>. Signed-off-by: Or Gerlitz <ogerlitz@mellanox.co.il> Signed-off-by: Roland Dreier <roland@purestorage.com>
2011-07-18IB/pma: Add include file for IBA performance counters definitionsOr Gerlitz
Move the various definitions and mad structures needed for software implementation of IBA PM agent from the ipath and qib drivers into a single include file, which in turn could be used by more consumers. Signed-off-by: Or Gerlitz <ogerlitz@mellanox.co.il> Signed-off-by: Roland Dreier <roland@purestorage.com>
2011-07-18mlx4_core: Add network flow countersOr Gerlitz
ConnectX devices support a set of flow counters that can be attached to a set containing one or more QPs. Each such counter tracks receive and transmit packets and bytes of these QPs. This patch queries the device to check support for counters, handles initialization of the HCA to enable counters, and initializes a bitmap allocator to control counter allocations. Derived from patch by Eli Cohen <eli@mellanox.co.il>. Signed-off-by: Or Gerlitz <ogerlitz@mellanox.co.il> Signed-off-by: Roland Dreier <roland@purestorage.com>
2011-07-18mlx4_core: Fix location of counter index in QP context structOr Gerlitz
Fix the address handle portion of the QP context structure to have the correct bit location for the counter index field. Signed-off-by: Eli Cohen <eli@mellanox.co.il> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.co.il> Signed-off-by: Roland Dreier <roland@purestorage.com>
2011-07-18mlx4_core: Read extended capabilities into the flags fieldOr Gerlitz
Query another dword containing up to 32 extended device capabilities and merge it into struct mlx4_caps.flags. Update the code that handles the current extended device capabilities (e.g UDP RSS, WoL, vep steering, etc) to use the extended device cap flags field instead of a field per extended capability. Initial patch done by Eli Cohen <eli@mellanox.co.il>. Signed-off-by: Or Gerlitz <ogerlitz@mellanox.co.il> Signed-off-by: Roland Dreier <roland@purestorage.com>
2011-07-18mlx4_core: Extend capability flags to 64 bitsOr Gerlitz
The latest firmware adds a second dword containing more device flags, so extend the device capabilities flags field from 32 to 64 bits. Derived from patch by Eli Cohen <eli@mellanox.co.il> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.co.il> Signed-off-by: Roland Dreier <roland@purestorage.com>
2011-07-18IB/core: Add GID change eventOr Gerlitz
Add IB GID change event type. This is needed for IBoE when the HW driver updates the GID (e.g when new VLANs are added/deleted) table and the change should be reflected to the IB core cache. Signed-off-by: Eli Cohen <eli@mellanox.co.il> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.co.il> Signed-off-by: Roland Dreier <roland@purestorage.com>
2011-07-18xen/trace: use class for multicall traceJeremy Fitzhardinge
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2011-07-18xen/trace: convert mmu events to use DECLARE_EVENT_CLASS()/DEFINE_EVENT()Jeremy Fitzhardinge
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2011-07-18xen/trace: add tlb flush tracepointsJeremy Fitzhardinge
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2011-07-18xen/trace: add segment desc tracingJeremy Fitzhardinge
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2011-07-18xen/trace: add xen_pgd_(un)pin tracepointsJeremy Fitzhardinge
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2011-07-18xen/trace: add ptpage alloc/release tracepointsJeremy Fitzhardinge
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2011-07-18xen/trace: add mmu tracepointsJeremy Fitzhardinge
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2011-07-18xen/trace: add multicall tracingJeremy Fitzhardinge
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2011-07-18trace/xen: add skeleton for Xen trace eventsJeremy Fitzhardinge
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2011-07-18dt: include linux/errno.h in linux/of_address.hGrant Likely
of_address.h makes reference to some of the error code #defines, so it needs to include errno.h. If CONFIG_PCI is not selected, then some files will fail to compile. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-07-18of/address: Add of_find_matching_node_by_address helperGrant Likely
of_find_matching_node_by_address() can be used to find a device tree node for a device at a specific address. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-07-18connector: add an event for monitoring process tracersVladimir Zapolskiy
This change adds a procfs connector event, which is emitted on every successful process tracer attach or detach. If some process connects to other one, kernelspace connector reports process id and thread group id of both these involved processes. On disconnection null process id is returned. Such an event allows to create a simple automated userspace mechanism to be aware about processes connecting to others, therefore predefined process policies can be applied to them if needed. Note, a detach signal is emitted only in case, if a tracer process explicitly executes PTRACE_DETACH request. In other cases like tracee or tracer exit detach event from proc connector is not reported. Signed-off-by: Vladimir Zapolskiy <vzapolskiy@gmail.com> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Oleg Nesterov <oleg@redhat.com>
2011-07-18ssb: SPROM: add LED duty cycle fieldsRafał Miłecki
Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-18include/linux/sdla.h: remove the prototype of sdla()WANG Cong
`make headers_check` complains that linux-2.6/usr/include/linux/sdla.h:116: userspace cannot reference function or variable defined in the kernel this is due to that there is no such a kernel function, void sdla(void *cfg_info, char *dev, struct frad_conf *conf, int quiet); I don't know why we have it in a kernel header, so remove it. Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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