diff mbox series

[37/40] xfs: create separate name hash function for xattrs

Message ID 171069246501.2684506.2064171073014791566.stgit@frogsfrogsfrogs (mailing list archive)
State New
Headers show
Series [01/40] fsverity: remove hash page spin lock | expand

Commit Message

Darrick J. Wong March 17, 2024, 4:33 p.m. UTC 
From: Darrick J. Wong <djwong@kernel.org>

Create a new hashing function for extended attribute names.  The next
patch needs this so it can modify the hash strategy for verity xattrs.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
---
 fs/xfs/libxfs/xfs_attr.c      |   16 ++++++++++++++--
 fs/xfs/libxfs/xfs_attr.h      |    3 +++
 fs/xfs/libxfs/xfs_attr_leaf.c |    4 ++--
 fs/xfs/scrub/attr.c           |    8 +++++---
 fs/xfs/xfs_attr_item.c        |    3 ++-
 fs/xfs/xfs_attr_list.c        |    3 ++-
 6 files changed, 28 insertions(+), 9 deletions(-)

Comments

Andrey Albershteyn March 18, 2024, 5:53 p.m. UTC | #1 
On 2024-03-17 09:33:02, Darrick J. Wong wrote:
> From: Darrick J. Wong <djwong@kernel.org>
> 
> Create a new hashing function for extended attribute names.  The next
> patch needs this so it can modify the hash strategy for verity xattrs.
> 
> Signed-off-by: Darrick J. Wong <djwong@kernel.org>

Looks good to me:
Reviewed-by: Andrey Albershteyn <aalbersh@redhat.com>

> ---
>  fs/xfs/libxfs/xfs_attr.c      |   16 ++++++++++++++--
>  fs/xfs/libxfs/xfs_attr.h      |    3 +++
>  fs/xfs/libxfs/xfs_attr_leaf.c |    4 ++--
>  fs/xfs/scrub/attr.c           |    8 +++++---
>  fs/xfs/xfs_attr_item.c        |    3 ++-
>  fs/xfs/xfs_attr_list.c        |    3 ++-
>  6 files changed, 28 insertions(+), 9 deletions(-)
> 
> 
> diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
> index b7aa1bc12fd1..b1fa45197eac 100644
> --- a/fs/xfs/libxfs/xfs_attr.c
> +++ b/fs/xfs/libxfs/xfs_attr.c
> @@ -238,6 +238,16 @@ xfs_attr_get_ilocked(
>  	return xfs_attr_node_get(args);
>  }
>  
> +/* Compute hash for an extended attribute name. */
> +xfs_dahash_t
> +xfs_attr_hashname(
> +	unsigned int		attr_flags,
> +	const uint8_t		*name,
> +	unsigned int		namelen)
> +{
> +	return xfs_da_hashname(name, namelen);
> +}
> +
>  /*
>   * Retrieve an extended attribute by name, and its value if requested.
>   *
> @@ -268,7 +278,8 @@ xfs_attr_get(
>  
>  	args->geo = args->dp->i_mount->m_attr_geo;
>  	args->whichfork = XFS_ATTR_FORK;
> -	args->hashval = xfs_da_hashname(args->name, args->namelen);
> +	args->hashval = xfs_attr_hashname(args->attr_filter, args->name,
> +					  args->namelen);
>  
>  	/* Entirely possible to look up a name which doesn't exist */
>  	args->op_flags = XFS_DA_OP_OKNOENT;
> @@ -942,7 +953,8 @@ xfs_attr_set(
>  
>  	args->geo = mp->m_attr_geo;
>  	args->whichfork = XFS_ATTR_FORK;
> -	args->hashval = xfs_da_hashname(args->name, args->namelen);
> +	args->hashval = xfs_attr_hashname(args->attr_filter, args->name,
> +					  args->namelen);
>  
>  	/*
>  	 * We have no control over the attribute names that userspace passes us
> diff --git a/fs/xfs/libxfs/xfs_attr.h b/fs/xfs/libxfs/xfs_attr.h
> index 92711c8d2a9f..19db6c1cc71f 100644
> --- a/fs/xfs/libxfs/xfs_attr.h
> +++ b/fs/xfs/libxfs/xfs_attr.h
> @@ -619,4 +619,7 @@ extern struct kmem_cache *xfs_attr_intent_cache;
>  int __init xfs_attr_intent_init_cache(void);
>  void xfs_attr_intent_destroy_cache(void);
>  
> +xfs_dahash_t xfs_attr_hashname(unsigned int attr_flags,
> +		const uint8_t *name_string, unsigned int name_length);
> +
>  #endif	/* __XFS_ATTR_H__ */
> diff --git a/fs/xfs/libxfs/xfs_attr_leaf.c b/fs/xfs/libxfs/xfs_attr_leaf.c
> index ac904cc1a97b..fcece25fd13e 100644
> --- a/fs/xfs/libxfs/xfs_attr_leaf.c
> +++ b/fs/xfs/libxfs/xfs_attr_leaf.c
> @@ -911,8 +911,8 @@ xfs_attr_shortform_to_leaf(
>  		nargs.namelen = sfe->namelen;
>  		nargs.value = &sfe->nameval[nargs.namelen];
>  		nargs.valuelen = sfe->valuelen;
> -		nargs.hashval = xfs_da_hashname(sfe->nameval,
> -						sfe->namelen);
> +		nargs.hashval = xfs_attr_hashname(sfe->flags, sfe->nameval,
> +						  sfe->namelen);
>  		nargs.attr_filter = sfe->flags & XFS_ATTR_NSP_ONDISK_MASK;
>  		error = xfs_attr3_leaf_lookup_int(bp, &nargs); /* set a->index */
>  		ASSERT(error == -ENOATTR);
> diff --git a/fs/xfs/scrub/attr.c b/fs/xfs/scrub/attr.c
> index c69dee281984..e7d50589f72d 100644
> --- a/fs/xfs/scrub/attr.c
> +++ b/fs/xfs/scrub/attr.c
> @@ -253,7 +253,6 @@ xchk_xattr_listent(
>  		.dp			= context->dp,
>  		.name			= name,
>  		.namelen		= namelen,
> -		.hashval		= xfs_da_hashname(name, namelen),
>  		.trans			= context->tp,
>  		.valuelen		= valuelen,
>  	};
> @@ -263,6 +262,7 @@ xchk_xattr_listent(
>  
>  	sx = container_of(context, struct xchk_xattr, context);
>  	ab = sx->sc->buf;
> +	args.hashval = xfs_attr_hashname(flags, name, namelen);
>  
>  	if (xchk_should_terminate(sx->sc, &error)) {
>  		context->seen_enough = error;
> @@ -600,7 +600,8 @@ xchk_xattr_rec(
>  			xchk_da_set_corrupt(ds, level);
>  			goto out;
>  		}
> -		calc_hash = xfs_da_hashname(lentry->nameval, lentry->namelen);
> +		calc_hash = xfs_attr_hashname(ent->flags, lentry->nameval,
> +				lentry->namelen);
>  	} else {
>  		rentry = (struct xfs_attr_leaf_name_remote *)
>  				(((char *)bp->b_addr) + nameidx);
> @@ -608,7 +609,8 @@ xchk_xattr_rec(
>  			xchk_da_set_corrupt(ds, level);
>  			goto out;
>  		}
> -		calc_hash = xfs_da_hashname(rentry->name, rentry->namelen);
> +		calc_hash = xfs_attr_hashname(ent->flags, rentry->name,
> +				rentry->namelen);
>  	}
>  	if (calc_hash != hash)
>  		xchk_da_set_corrupt(ds, level);
> diff --git a/fs/xfs/xfs_attr_item.c b/fs/xfs/xfs_attr_item.c
> index 703770cf1482..4d8264f0a537 100644
> --- a/fs/xfs/xfs_attr_item.c
> +++ b/fs/xfs/xfs_attr_item.c
> @@ -536,7 +536,8 @@ xfs_attri_recover_work(
>  	args->whichfork = XFS_ATTR_FORK;
>  	args->name = nv->name.i_addr;
>  	args->namelen = nv->name.i_len;
> -	args->hashval = xfs_da_hashname(args->name, args->namelen);
> +	args->hashval = xfs_attr_hashname(attrp->alfi_attr_filter, args->name,
> +					  args->namelen);
>  	args->attr_filter = attrp->alfi_attr_filter & XFS_ATTRI_FILTER_MASK;
>  	args->op_flags = XFS_DA_OP_RECOVERY | XFS_DA_OP_OKNOENT |
>  			 XFS_DA_OP_LOGGED;
> diff --git a/fs/xfs/xfs_attr_list.c b/fs/xfs/xfs_attr_list.c
> index fa74378577c5..96169474d023 100644
> --- a/fs/xfs/xfs_attr_list.c
> +++ b/fs/xfs/xfs_attr_list.c
> @@ -135,7 +135,8 @@ xfs_attr_shortform_list(
>  		}
>  
>  		sbp->entno = i;
> -		sbp->hash = xfs_da_hashname(sfe->nameval, sfe->namelen);
> +		sbp->hash = xfs_attr_hashname(sfe->flags, sfe->nameval,
> +					      sfe->namelen);
>  		sbp->name = sfe->nameval;
>  		sbp->namelen = sfe->namelen;
>  		/* These are bytes, and both on-disk, don't endian-flip */
>
diff mbox series

Patch

diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index b7aa1bc12fd1..b1fa45197eac 100644
--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -238,6 +238,16 @@  xfs_attr_get_ilocked(
 	return xfs_attr_node_get(args);
 }
 
+/* Compute hash for an extended attribute name. */
+xfs_dahash_t
+xfs_attr_hashname(
+	unsigned int		attr_flags,
+	const uint8_t		*name,
+	unsigned int		namelen)
+{
+	return xfs_da_hashname(name, namelen);
+}
+
 /*
  * Retrieve an extended attribute by name, and its value if requested.
  *
@@ -268,7 +278,8 @@  xfs_attr_get(
 
 	args->geo = args->dp->i_mount->m_attr_geo;
 	args->whichfork = XFS_ATTR_FORK;
-	args->hashval = xfs_da_hashname(args->name, args->namelen);
+	args->hashval = xfs_attr_hashname(args->attr_filter, args->name,
+					  args->namelen);
 
 	/* Entirely possible to look up a name which doesn't exist */
 	args->op_flags = XFS_DA_OP_OKNOENT;
@@ -942,7 +953,8 @@  xfs_attr_set(
 
 	args->geo = mp->m_attr_geo;
 	args->whichfork = XFS_ATTR_FORK;
-	args->hashval = xfs_da_hashname(args->name, args->namelen);
+	args->hashval = xfs_attr_hashname(args->attr_filter, args->name,
+					  args->namelen);
 
 	/*
 	 * We have no control over the attribute names that userspace passes us
diff --git a/fs/xfs/libxfs/xfs_attr.h b/fs/xfs/libxfs/xfs_attr.h
index 92711c8d2a9f..19db6c1cc71f 100644
--- a/fs/xfs/libxfs/xfs_attr.h
+++ b/fs/xfs/libxfs/xfs_attr.h
@@ -619,4 +619,7 @@  extern struct kmem_cache *xfs_attr_intent_cache;
 int __init xfs_attr_intent_init_cache(void);
 void xfs_attr_intent_destroy_cache(void);
 
+xfs_dahash_t xfs_attr_hashname(unsigned int attr_flags,
+		const uint8_t *name_string, unsigned int name_length);
+
 #endif	/* __XFS_ATTR_H__ */
diff --git a/fs/xfs/libxfs/xfs_attr_leaf.c b/fs/xfs/libxfs/xfs_attr_leaf.c
index ac904cc1a97b..fcece25fd13e 100644
--- a/fs/xfs/libxfs/xfs_attr_leaf.c
+++ b/fs/xfs/libxfs/xfs_attr_leaf.c
@@ -911,8 +911,8 @@  xfs_attr_shortform_to_leaf(
 		nargs.namelen = sfe->namelen;
 		nargs.value = &sfe->nameval[nargs.namelen];
 		nargs.valuelen = sfe->valuelen;
-		nargs.hashval = xfs_da_hashname(sfe->nameval,
-						sfe->namelen);
+		nargs.hashval = xfs_attr_hashname(sfe->flags, sfe->nameval,
+						  sfe->namelen);
 		nargs.attr_filter = sfe->flags & XFS_ATTR_NSP_ONDISK_MASK;
 		error = xfs_attr3_leaf_lookup_int(bp, &nargs); /* set a->index */
 		ASSERT(error == -ENOATTR);
diff --git a/fs/xfs/scrub/attr.c b/fs/xfs/scrub/attr.c
index c69dee281984..e7d50589f72d 100644
--- a/fs/xfs/scrub/attr.c
+++ b/fs/xfs/scrub/attr.c
@@ -253,7 +253,6 @@  xchk_xattr_listent(
 		.dp			= context->dp,
 		.name			= name,
 		.namelen		= namelen,
-		.hashval		= xfs_da_hashname(name, namelen),
 		.trans			= context->tp,
 		.valuelen		= valuelen,
 	};
@@ -263,6 +262,7 @@  xchk_xattr_listent(
 
 	sx = container_of(context, struct xchk_xattr, context);
 	ab = sx->sc->buf;
+	args.hashval = xfs_attr_hashname(flags, name, namelen);
 
 	if (xchk_should_terminate(sx->sc, &error)) {
 		context->seen_enough = error;
@@ -600,7 +600,8 @@  xchk_xattr_rec(
 			xchk_da_set_corrupt(ds, level);
 			goto out;
 		}
-		calc_hash = xfs_da_hashname(lentry->nameval, lentry->namelen);
+		calc_hash = xfs_attr_hashname(ent->flags, lentry->nameval,
+				lentry->namelen);
 	} else {
 		rentry = (struct xfs_attr_leaf_name_remote *)
 				(((char *)bp->b_addr) + nameidx);
@@ -608,7 +609,8 @@  xchk_xattr_rec(
 			xchk_da_set_corrupt(ds, level);
 			goto out;
 		}
-		calc_hash = xfs_da_hashname(rentry->name, rentry->namelen);
+		calc_hash = xfs_attr_hashname(ent->flags, rentry->name,
+				rentry->namelen);
 	}
 	if (calc_hash != hash)
 		xchk_da_set_corrupt(ds, level);
diff --git a/fs/xfs/xfs_attr_item.c b/fs/xfs/xfs_attr_item.c
index 703770cf1482..4d8264f0a537 100644
--- a/fs/xfs/xfs_attr_item.c
+++ b/fs/xfs/xfs_attr_item.c
@@ -536,7 +536,8 @@  xfs_attri_recover_work(
 	args->whichfork = XFS_ATTR_FORK;
 	args->name = nv->name.i_addr;
 	args->namelen = nv->name.i_len;
-	args->hashval = xfs_da_hashname(args->name, args->namelen);
+	args->hashval = xfs_attr_hashname(attrp->alfi_attr_filter, args->name,
+					  args->namelen);
 	args->attr_filter = attrp->alfi_attr_filter & XFS_ATTRI_FILTER_MASK;
 	args->op_flags = XFS_DA_OP_RECOVERY | XFS_DA_OP_OKNOENT |
 			 XFS_DA_OP_LOGGED;
diff --git a/fs/xfs/xfs_attr_list.c b/fs/xfs/xfs_attr_list.c
index fa74378577c5..96169474d023 100644
--- a/fs/xfs/xfs_attr_list.c
+++ b/fs/xfs/xfs_attr_list.c
@@ -135,7 +135,8 @@  xfs_attr_shortform_list(
 		}
 
 		sbp->entno = i;
-		sbp->hash = xfs_da_hashname(sfe->nameval, sfe->namelen);
+		sbp->hash = xfs_attr_hashname(sfe->flags, sfe->nameval,
+					      sfe->namelen);
 		sbp->name = sfe->nameval;
 		sbp->namelen = sfe->namelen;
 		/* These are bytes, and both on-disk, don't endian-flip */