/* * linux/fs/hfs/attr.c * * (C) 2003 Ardis Technologies * * Export hfs data via xattr */ #include #include #include "hfs_fs.h" #include "btree.h" enum hfs_xattr_type { HFS_TYPE, HFS_CREATOR, }; static int __hfs_setxattr(struct inode *inode, enum hfs_xattr_type type, const void *value, size_t size, int flags) { struct hfs_find_data fd; hfs_cat_rec rec; struct hfs_cat_file *file; int res; if (!S_ISREG(inode->i_mode) || HFS_IS_RSRC(inode)) return -EOPNOTSUPP; res = hfs_find_init(HFS_SB(inode->i_sb)->cat_tree, &fd); if (res) return res; fd.search_key->cat = HFS_I(inode)->cat_key; res = hfs_brec_find(&fd); if (res) goto out; hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, sizeof(struct hfs_cat_file)); file = &rec.file; switch (type) { case HFS_TYPE: if (size == 4) memcpy(&file->UsrWds.fdType, value, 4); else res = -ERANGE; break; case HFS_CREATOR: if (size == 4) memcpy(&file->UsrWds.fdCreator, value, 4); else res = -ERANGE; break; } if (!res) hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, sizeof(struct hfs_cat_file)); out: hfs_find_exit(&fd); return res; } static ssize_t __hfs_getxattr(struct inode *inode, enum hfs_xattr_type type, void *value, size_t size) { struct hfs_find_data fd; hfs_cat_rec rec; struct hfs_cat_file *file; ssize_t res = 0; if (!S_ISREG(inode->i_mode) || HFS_IS_RSRC(inode)) return -EOPNOTSUPP; if (size) { res = hfs_find_init(HFS_SB(inode->i_sb)->cat_tree, &fd); if (res) return res; fd.search_key->cat = HFS_I(inode)->cat_key; res = hfs_brec_find(&fd); if (res) goto out; hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, sizeof(struct hfs_cat_file)); } file = &rec.file; switch (type) { case HFS_TYPE: if (size >= 4) { memcpy(value, &file->UsrWds.fdType, 4); res = 4; } else res = size ? -ERANGE : 4; break; case HFS_CREATOR: if (size >= 4) { memcpy(value, &file->UsrWds.fdCreator, 4); res = 4; } else res = size ? -ERANGE : 4; break; } out: if (size) hfs_find_exit(&fd); return res; } static int hfs_xattr_get(const struct xattr_handler *handler, struct dentry *unused, struct inode *inode, const char *name, void *value, size_t size) { return __hfs_getxattr(inode, handler->flags, value, size); } static int hfs_xattr_set(const struct xattr_handler *handler, struct dentry *unused, struct inode *inode, const char *name, const void *value, size_t size, int flags) { if (!value) return -EOPNOTSUPP; return __hfs_setxattr(inode, handler->flags, value, size, flags); } static const struct xattr_handler hfs_creator_handler = { .name = "hfs.creator", .flags = HFS_CREATOR, .get = hfs_xattr_get, .set = hfs_xattr_set, }; static const struct xattr_handler hfs_type_handler = { .name = "hfs.type", .flags = HFS_TYPE, .get = hfs_xattr_get, .set = hfs_xattr_set, }; const struct xattr_handler *hfs_xattr_handlers[] = { &hfs_creator_handler, &hfs_type_handler, NULL }; 2443cd5f67fc6ee7c05a88e4996e8177f91b'>uapi/asm-generic/shmbuf.h
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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2017-02-03 17:10:28 +1100
committerMichael Ellerman <mpe@ellerman.id.au>2017-02-08 23:36:29 +1100
commitd7df2443cd5f67fc6ee7c05a88e4996e8177f91b (patch)
tree098a7c0ca4fceb8a65cb1f693c9d71990388933d /include/uapi/asm-generic/shmbuf.h
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 'include/uapi/asm-generic/shmbuf.h')