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fsverity: optimize fsverity_cleanup_inode() on non-verity files

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Make fsverity_cleanup_inode() an inline function that checks for
non-NULL ->i_verity_info, then (if needed) calls
__fsverity_cleanup_inode() to do the real work.  This reduces the
overhead on non-verity files.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Dave Chinner <dchinner@redhat.com>
Link: https://lore.kernel.org/r/20221214224304.145712-4-ebiggers@kernel.org
This commit is contained in:
Eric Biggers 2022-12-14 14:43:03 -08:00
parent 01d90c07a5
commit 9642946c6c
2 changed files with 15 additions and 9 deletions
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10
fs/verity/open.c
View File

@ -348,18 +348,12 @@ int __fsverity_prepare_setattr(struct dentry *dentry, struct iattr *attr)
}
EXPORT_SYMBOL_GPL(__fsverity_prepare_setattr);
/**
* fsverity_cleanup_inode() - free the inode's verity info, if present
* @inode: an inode being evicted
*
* Filesystems must call this on inode eviction to free ->i_verity_info.
*/
void fsverity_cleanup_inode(struct inode *inode)
void __fsverity_cleanup_inode(struct inode *inode)
{
fsverity_free_info(inode->i_verity_info);
inode->i_verity_info = NULL;
}
EXPORT_SYMBOL_GPL(fsverity_cleanup_inode);
EXPORT_SYMBOL_GPL(__fsverity_cleanup_inode);
int __init fsverity_init_info_cache(void)
{

14
include/linux/fsverity.h
View File

@ -150,7 +150,19 @@ int fsverity_get_digest(struct inode *inode,
int __fsverity_file_open(struct inode *inode, struct file *filp);
int __fsverity_prepare_setattr(struct dentry *dentry, struct iattr *attr);
void fsverity_cleanup_inode(struct inode *inode);
void __fsverity_cleanup_inode(struct inode *inode);
/**
* fsverity_cleanup_inode() - free the inode's verity info, if present
* @inode: an inode being evicted
*
* Filesystems must call this on inode eviction to free ->i_verity_info.
*/
static inline void fsverity_cleanup_inode(struct inode *inode)
{
if (inode->i_verity_info)
__fsverity_cleanup_inode(inode);
}
/* read_metadata.c */