/* * mmap.c * * Copyright (C) 1995, 1996 by Volker Lendecke * Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache * */ #include #include #include #include #include #include #include #include #include #include #include #include #include "ncp_fs.h" /* * Fill in the supplied page for mmap * XXX: how are we excluding truncate/invalidate here? Maybe need to lock * page? */ static int ncp_file_mmap_fault(struct vm_area_struct *area, struct vm_fault *vmf) { struct inode *inode = file_inode(area->vm_file); char *pg_addr; unsigned int already_read; unsigned int count; int bufsize; int pos; /* XXX: loff_t ? */ /* * ncpfs has nothing against high pages as long * as recvmsg and memset works on it */ vmf->page = alloc_page(GFP_HIGHUSER); if (!vmf->page) return VM_FAULT_OOM; pg_addr = kmap(vmf->page); pos = vmf->pgoff << PAGE_SHIFT; count = PAGE_SIZE; /* what we can read in one go */ bufsize = NCP_SERVER(inode)->buffer_size; already_read = 0; if (ncp_make_open(inode, O_RDONLY) >= 0) { while (already_read < count) { int read_this_time; int to_read; to_read = bufsize - (pos % bufsize); to_read = min_t(unsigned int, to_read, count - already_read); if (ncp_read_kernel(NCP_SERVER(inode), NCP_FINFO(inode)->file_handle, pos, to_read, pg_addr + already_read, &read_this_time) != 0) { read_this_time = 0; } pos += read_this_time; already_read += read_this_time; if (read_this_time < to_read) { break; } } ncp_inode_close(inode); } if (already_read < PAGE_SIZE) memset(pg_addr + already_read, 0, PAGE_SIZE - already_read); flush_dcache_page(vmf->page); kunmap(vmf->page); /* * If I understand ncp_read_kernel() properly, the above always * fetches from the network, here the analogue of disk. * -- nyc */ count_vm_event(PGMAJFAULT); mem_cgroup_count_vm_event(area->vm_mm, PGMAJFAULT); return VM_FAULT_MAJOR; } static const struct vm_operations_struct ncp_file_mmap = { .fault = ncp_file_mmap_fault, }; /* This is used for a general mmap of a ncp file */ int ncp_mmap(struct file *file, struct vm_area_struct *vma) { struct inode *inode = file_inode(file); ncp_dbg(1, "called\n"); if (!ncp_conn_valid(NCP_SERVER(inode))) return -EIO; /* only PAGE_COW or read-only supported now */ if (vma->vm_flags & VM_SHARED) return -EINVAL; /* we do not support files bigger than 4GB... We eventually supports just 4GB... */ if (vma_pages(vma) + vma->vm_pgoff > (1U << (32 - PAGE_SHIFT))) return -EFBIG; vma->vm_ops = &ncp_file_mmap; file_accessed(file); return 0; } >fs/nfsd/nfs3acl.c
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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2017-01-17 13:46:29 +0000
committerHerbert Xu <herbert@gondor.apana.org.au>2017-01-23 22:41:33 +0800
commit11e3b725cfc282efe9d4a354153e99d86a16af08 (patch)
tree8b5b9e0e1bcae1ab98ee652ffb7b13b05c209bd6 /fs/nfsd/nfs3acl.c
parentd6040764adcb5cb6de1489422411d701c158bb69 (diff)
crypto: arm64/aes-blk - honour iv_out requirement in CBC and CTR modes
Update the ARMv8 Crypto Extensions and the plain NEON AES implementations in CBC and CTR modes to return the next IV back to the skcipher API client. This is necessary for chaining to work correctly. Note that for CTR, this is only done if the request is a round multiple of the block size, since otherwise, chaining is impossible anyway. Cc: <stable@vger.kernel.org> # v3.16+ Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'fs/nfsd/nfs3acl.c')