/* * sysfs.h - sysfs support declarations. * * Copyright (C) 2005-2014 Nippon Telegraph and Telephone Corporation. * Copyright (C) 2014 HGST, Inc., a Western Digital Company. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * Written by Vyacheslav Dubeyko */ #ifndef _NILFS_SYSFS_H #define _NILFS_SYSFS_H #include #define NILFS_ROOT_GROUP_NAME "nilfs2" /* * struct nilfs_sysfs_dev_subgroups - device subgroup kernel objects * @sg_superblock_kobj: /sys/fs///superblock * @sg_superblock_kobj_unregister: completion state * @sg_segctor_kobj: /sys/fs///segctor * @sg_segctor_kobj_unregister: completion state * @sg_mounted_snapshots_kobj: /sys/fs///mounted_snapshots * @sg_mounted_snapshots_kobj_unregister: completion state * @sg_checkpoints_kobj: /sys/fs///checkpoints * @sg_checkpoints_kobj_unregister: completion state * @sg_segments_kobj: /sys/fs///segments * @sg_segments_kobj_unregister: completion state */ struct nilfs_sysfs_dev_subgroups { /* /sys/fs///superblock */ struct kobject sg_superblock_kobj; struct completion sg_superblock_kobj_unregister; /* /sys/fs///segctor */ struct kobject sg_segctor_kobj; struct completion sg_segctor_kobj_unregister; /* /sys/fs///mounted_snapshots */ struct kobject sg_mounted_snapshots_kobj; struct completion sg_mounted_snapshots_kobj_unregister; /* /sys/fs///checkpoints */ struct kobject sg_checkpoints_kobj; struct completion sg_checkpoints_kobj_unregister; /* /sys/fs///segments */ struct kobject sg_segments_kobj; struct completion sg_segments_kobj_unregister; }; #define NILFS_COMMON_ATTR_STRUCT(name) \ struct nilfs_##name##_attr { \ struct attribute attr; \ ssize_t (*show)(struct kobject *, struct attribute *, \ char *); \ ssize_t (*store)(struct kobject *, struct attribute *, \ const char *, size_t); \ } NILFS_COMMON_ATTR_STRUCT(feature); #define NILFS_DEV_ATTR_STRUCT(name) \ struct nilfs_##name##_attr { \ struct attribute attr; \ ssize_t (*show)(struct nilfs_##name##_attr *, struct the_nilfs *, \ char *); \ ssize_t (*store)(struct nilfs_##name##_attr *, struct the_nilfs *, \ const char *, size_t); \ } NILFS_DEV_ATTR_STRUCT(dev); NILFS_DEV_ATTR_STRUCT(segments); NILFS_DEV_ATTR_STRUCT(mounted_snapshots); NILFS_DEV_ATTR_STRUCT(checkpoints); NILFS_DEV_ATTR_STRUCT(superblock); NILFS_DEV_ATTR_STRUCT(segctor); #define NILFS_CP_ATTR_STRUCT(name) \ struct nilfs_##name##_attr { \ struct attribute attr; \ ssize_t (*show)(struct nilfs_##name##_attr *, struct nilfs_root *, \ char *); \ ssize_t (*store)(struct nilfs_##name##_attr *, struct nilfs_root *, \ const char *, size_t); \ } NILFS_CP_ATTR_STRUCT(snapshot); #define NILFS_ATTR(type, name, mode, show, store) \ static struct nilfs_##type##_attr nilfs_##type##_attr_##name = \ __ATTR(name, mode, show, store) #define NILFS_INFO_ATTR(type, name) \ NILFS_ATTR(type, name, 0444, NULL, NULL) #define NILFS_RO_ATTR(type, name) \ NILFS_ATTR(type, name, 0444, nilfs_##type##_##name##_show, NULL) #define NILFS_RW_ATTR(type, name) \ NILFS_ATTR(type, name, 0644, \ nilfs_##type##_##name##_show, \ nilfs_##type##_##name##_store) #define NILFS_FEATURE_INFO_ATTR(name) \ NILFS_INFO_ATTR(feature, name) #define NILFS_FEATURE_RO_ATTR(name) \ NILFS_RO_ATTR(feature, name) #define NILFS_FEATURE_RW_ATTR(name) \ NILFS_RW_ATTR(feature, name) #define NILFS_DEV_INFO_ATTR(name) \ NILFS_INFO_ATTR(dev, name) #define NILFS_DEV_RO_ATTR(name) \ NILFS_RO_ATTR(dev, name) #define NILFS_DEV_RW_ATTR(name) \ NILFS_RW_ATTR(dev, name) #define NILFS_SEGMENTS_RO_ATTR(name) \ NILFS_RO_ATTR(segments, name) #define NILFS_SEGMENTS_RW_ATTR(name) \ NILFS_RW_ATTR(segs_info, name) #define NILFS_MOUNTED_SNAPSHOTS_RO_ATTR(name) \ NILFS_RO_ATTR(mounted_snapshots, name) #define NILFS_CHECKPOINTS_RO_ATTR(name) \ NILFS_RO_ATTR(checkpoints, name) #define NILFS_CHECKPOINTS_RW_ATTR(name) \ NILFS_RW_ATTR(checkpoints, name) #define NILFS_SNAPSHOT_INFO_ATTR(name) \ NILFS_INFO_ATTR(snapshot, name) #define NILFS_SNAPSHOT_RO_ATTR(name) \ NILFS_RO_ATTR(snapshot, name) #define NILFS_SNAPSHOT_RW_ATTR(name) \ NILFS_RW_ATTR(snapshot, name) #define NILFS_SUPERBLOCK_RO_ATTR(name) \ NILFS_RO_ATTR(superblock, name) #define NILFS_SUPERBLOCK_RW_ATTR(name) \ NILFS_RW_ATTR(superblock, name) #define NILFS_SEGCTOR_INFO_ATTR(name) \ NILFS_INFO_ATTR(segctor, name) #define NILFS_SEGCTOR_RO_ATTR(name) \ NILFS_RO_ATTR(segctor, name) #define NILFS_SEGCTOR_RW_ATTR(name) \ NILFS_RW_ATTR(segctor, name) #define NILFS_FEATURE_ATTR_LIST(name) \ (&nilfs_feature_attr_##name.attr) #define NILFS_DEV_ATTR_LIST(name) \ (&nilfs_dev_attr_##name.attr) #define NILFS_SEGMENTS_ATTR_LIST(name) \ (&nilfs_segments_attr_##name.attr) #define NILFS_MOUNTED_SNAPSHOTS_ATTR_LIST(name) \ (&nilfs_mounted_snapshots_attr_##name.attr) #define NILFS_CHECKPOINTS_ATTR_LIST(name) \ (&nilfs_checkpoints_attr_##name.attr) #define NILFS_SNAPSHOT_ATTR_LIST(name) \ (&nilfs_snapshot_attr_##name.attr) #define NILFS_SUPERBLOCK_ATTR_LIST(name) \ (&nilfs_superblock_attr_##name.attr) #define NILFS_SEGCTOR_ATTR_LIST(name) \ (&nilfs_segctor_attr_##name.attr) #endif /* _NILFS_SYSFS_H */ r>tree098a7c0ca4fceb8a65cb1f693c9d71990388933d /tools/testing/selftests/memfd parenta0615a16f7d0ceb5804d295203c302d496d8ee91 (diff)

powerpc/mm: Fix spurrious segfaults on radix with autonuma

When autonuma (Automatic NUMA balancing) marks a PTE inaccessible it clears all the protection bits but leave the PTE valid. With the Radix MMU, an attempt at executing from such a PTE will take a fault with bit 35 of SRR1 set "SRR1_ISI_N_OR_G". It is thus incorrect to treat all such faults as errors. We should pass them to handle_mm_fault() for autonuma to deal with. The case of pages that are really not executable is handled by the existing test for VM_EXEC further down. That leaves us with catching the kernel attempts at executing user pages. We can catch that earlier, even before we do find_vma. It is never valid on powerpc for the kernel to take an exec fault to begin with. So fold that test with the existing test for the kernel faulting on kernel addresses to bail out early. Fixes: 1d18ad026844 ("powerpc/mm: Detect instruction fetch denied and report") Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

Diffstat (limited to 'tools/testing/selftests/memfd')