expfs.c (b52878275ce54b5d3a654ed24dfb169c1c501998) expfs.c (304e9c83e80d5cbe20ab64ffa1fac9fc51d30bc9)
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) Neil Brown 2002
4 * Copyright (C) Christoph Hellwig 2007
5 *
6 * This file contains the code mapping from inodes to NFS file handles,
7 * and for mapping back from file handles to dentries.
8 *

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376 fid->i32.parent_gen = parent->i_generation;
377 len = 4;
378 type = FILEID_INO32_GEN_PARENT;
379 }
380 *max_len = len;
381 return type;
382}
383
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) Neil Brown 2002
4 * Copyright (C) Christoph Hellwig 2007
5 *
6 * This file contains the code mapping from inodes to NFS file handles,
7 * and for mapping back from file handles to dentries.
8 *

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376 fid->i32.parent_gen = parent->i_generation;
377 len = 4;
378 type = FILEID_INO32_GEN_PARENT;
379 }
380 *max_len = len;
381 return type;
382}
383
384/**
385 * exportfs_encode_inode_fh - encode a file handle from inode
386 * @inode: the object to encode
387 * @fid: where to store the file handle fragment
388 * @max_len: maximum length to store there
389 * @flags: properties of the requested file handle
390 *
391 * Returns an enum fid_type or a negative errno.
392 */
384int exportfs_encode_inode_fh(struct inode *inode, struct fid *fid,
393int exportfs_encode_inode_fh(struct inode *inode, struct fid *fid,
385 int *max_len, struct inode *parent)
394 int *max_len, struct inode *parent, int flags)
386{
387 const struct export_operations *nop = inode->i_sb->s_export_op;
388
395{
396 const struct export_operations *nop = inode->i_sb->s_export_op;
397
398 /*
399 * If a decodeable file handle was requested, we need to make sure that
400 * filesystem can decode file handles.
401 */
402 if (nop && !(flags & EXPORT_FH_FID) && !nop->fh_to_dentry)
403 return -EOPNOTSUPP;
404
389 if (nop && nop->encode_fh)
390 return nop->encode_fh(inode, fid->raw, max_len, parent);
391
392 return export_encode_fh(inode, fid, max_len, parent);
393}
394EXPORT_SYMBOL_GPL(exportfs_encode_inode_fh);
395
396/**

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413 p = dget_parent(dentry);
414 /*
415 * note that while p might've ceased to be our parent already,
416 * it's still pinned by and still positive.
417 */
418 parent = p->d_inode;
419 }
420
405 if (nop && nop->encode_fh)
406 return nop->encode_fh(inode, fid->raw, max_len, parent);
407
408 return export_encode_fh(inode, fid, max_len, parent);
409}
410EXPORT_SYMBOL_GPL(exportfs_encode_inode_fh);
411
412/**

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429 p = dget_parent(dentry);
430 /*
431 * note that while p might've ceased to be our parent already,
432 * it's still pinned by and still positive.
433 */
434 parent = p->d_inode;
435 }
436
421 error = exportfs_encode_inode_fh(inode, fid, max_len, parent);
437 error = exportfs_encode_inode_fh(inode, fid, max_len, parent, flags);
422 dput(p);
423
424 return error;
425}
426EXPORT_SYMBOL_GPL(exportfs_encode_fh);
427
428struct dentry *
429exportfs_decode_fh_raw(struct vfsmount *mnt, struct fid *fid, int fh_len,

--- 166 unchanged lines hidden --- 		438 dput(p);
439
440 return error;
441}
442EXPORT_SYMBOL_GPL(exportfs_encode_fh);
443
444struct dentry *
445exportfs_decode_fh_raw(struct vfsmount *mnt, struct fid *fid, int fh_len,

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