函数源码 |
Source File:include\linux\fscrypt.h |
Create Date:2022-07-29 10:32:14 |
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557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 | /** * fscrypt_prepare_link - prepare to link an inode into a possibly-encrypted directory * @old_dentry: an existing dentry for the inode being linked * @dir: the target directory * @dentry: negative dentry for the target filename * * A new link can only be added to an encrypted directory if the directory's * encryption key is available --- since otherwise we'd have no way to encrypt * the filename. Therefore, we first set up the directory's encryption key (if * not already done) and return an error if it's unavailable. * * We also verify that the link will not violate the constraint that all files * in an encrypted directory tree use the same encryption policy. * * Return: 0 on success, -ENOKEY if the directory's encryption key is missing, * -EXDEV if the link would result in an inconsistent encryption policy, or * another -errno code. */static inline int fscrypt_prepare_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry){ if (IS_ENCRYPTED(dir)) return __fscrypt_prepare_link(d_inode(old_dentry), dir, dentry); return 0;} |