[10/20] xfs: create separate name hash function for xattrs

Message ID	171069247813.2685643.380949365170709573.stgit@frogsfrogsfrogs (mailing list archive)
State	New, archived
Headers	show Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 312761CF89; Sun, 17 Mar 2024 16:36:26 +0000 (UTC) Date: Sun, 17 Mar 2024 09:36:26 -0700 Subject: [PATCH 10/20] xfs: create separate name hash function for xattrs From: "Darrick J. Wong" <djwong@kernel.org> To: aalbersh@redhat.com, djwong@kernel.org, cem@kernel.org, ebiggers@kernel.org Cc: fsverity@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org Message-ID: <171069247813.2685643.380949365170709573.stgit@frogsfrogsfrogs> In-Reply-To: <171069247657.2685643.11583844772215446491.stgit@frogsfrogsfrogs> References: <171069247657.2685643.11583844772215446491.stgit@frogsfrogsfrogs> User-Agent: StGit/0.19 Precedence: bulk MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit
Series	[01/20] xfsprogs: add parent pointer support to attribute code \| expand [01/20] xfsprogs: add parent pointer support to attribute code [02/20] xfsprogs: define parent pointer xattr format [03/20] xfsprogs: Add xfs_verify_pptr [04/20] fs: add FS_XFLAG_VERITY for verity files [05/20] xfs: add attribute type for fs-verity [06/20] xfs: add fs-verity ro-compat flag [07/20] xfs: add inode on-disk VERITY flag [08/20] xfs: add fs-verity support [09/20] xfs: advertise fs-verity being available on filesystem [10/20] xfs: create separate name hash function for xattrs [11/20] xfs: use merkle tree offset as attr hash [12/20] xfs: enable ro-compat fs-verity flag [13/20] libfrog: add fsverity to xfs_report_geom output [14/20] xfs_db: introduce attr_modify command [15/20] xfs_db: make attr_set/remove/modify be able to handle fs-verity attrs [16/20] man: document attr_modify command [17/20] xfs_db: dump verity features and metadata [18/20] xfs_db: dump merkle tree data [19/20] xfs_repair: junk fsverity xattrs when unnecessary [20/20] mkfs.xfs: add verity parameter

diff --git a/db/hash.c b/db/hash.c index 05a94f24..df214c16 100644 --- a/db/hash.c +++ b/db/hash.c @@ -73,7 +73,7 @@ hash_f( if (use_dir2_hash) hashval = libxfs_dir2_hashname(mp, &xname); else - hashval = libxfs_da_hashname(xname.name, xname.len); + hashval = libxfs_attr_hashname(0, xname.name, xname.len); dbprintf("0x%x\n", hashval); } @@ -306,7 +306,7 @@ collide_xattrs( unsigned long i; int error; - old_hash = libxfs_da_hashname((uint8_t *)name, namelen); + old_hash = libxfs_attr_hashname(0, (uint8_t *)name, namelen); if (fd >= 0) { /* diff --git a/db/metadump.c b/db/metadump.c index a656ef57..95f58363 100644 --- a/db/metadump.c +++ b/db/metadump.c @@ -823,6 +823,7 @@ handle_duplicate_name(xfs_dahash_t hash, size_t name_len, unsigned char *name) static inline xfs_dahash_t dirattr_hashname( bool is_dirent, + unsigned int attr_flags, const uint8_t *name, int namelen) { @@ -835,12 +836,13 @@ dirattr_hashname( return libxfs_dir2_hashname(mp, &xname); } - return libxfs_da_hashname(name, namelen); + return libxfs_attr_hashname(attr_flags, name, namelen); } static void generate_obfuscated_name( xfs_ino_t ino, + unsigned int attr_flags, int namelen, unsigned char *name) { @@ -866,9 +868,9 @@ generate_obfuscated_name( /* Obfuscate the name (if possible) */ - hash = dirattr_hashname(ino != 0, name, namelen); + hash = dirattr_hashname(ino != 0, attr_flags, name, namelen); obfuscate_name(hash, namelen, name, ino != 0); - ASSERT(hash == dirattr_hashname(ino != 0, name, namelen)); + ASSERT(hash == dirattr_hashname(ino != 0, attr_flags, name, namelen)); /* * Make sure the name is not something already seen. If we @@ -945,7 +947,7 @@ process_sf_dir( if (metadump.obfuscate) generate_obfuscated_name( libxfs_dir2_sf_get_ino(mp, sfp, sfep), - namelen, &sfep->name[0]); + 0, namelen, &sfep->name[0]); sfep = (xfs_dir2_sf_entry_t *)((char *)sfep + libxfs_dir2_sf_entsize(mp, sfp, namelen)); @@ -1071,8 +1073,8 @@ process_sf_attr( } if (metadump.obfuscate) { - generate_obfuscated_name(0, asfep->namelen, - &asfep->nameval[0]); + generate_obfuscated_name(0, asfep->flags, + asfep->namelen, &asfep->nameval[0]); memset(&asfep->nameval[asfep->namelen], 'v', asfep->valuelen); } @@ -1283,7 +1285,7 @@ process_dir_data_block( if (metadump.obfuscate) generate_obfuscated_name(be64_to_cpu(dep->inumber), - dep->namelen, &dep->name[0]); + 0, dep->namelen, &dep->name[0]); dir_offset += length; ptr += length; /* Zero the unused space after name, up to the tag */ @@ -1452,8 +1454,9 @@ process_attr_block( break; } if (metadump.obfuscate) { - generate_obfuscated_name(0, local->namelen, - &local->nameval[0]); + generate_obfuscated_name(0, entry->flags, + local->namelen, + &local->nameval[0]); memset(&local->nameval[local->namelen], 'v', be16_to_cpu(local->valuelen)); } @@ -1475,8 +1478,9 @@ process_attr_block( break; } if (metadump.obfuscate) { - generate_obfuscated_name(0, remote->namelen, - &remote->name[0]); + generate_obfuscated_name(0, entry->flags, + remote->namelen, + &remote->name[0]); add_remote_vals(be32_to_cpu(remote->valueblk), be32_to_cpu(remote->valuelen)); } diff --git a/libxfs/libxfs_api_defs.h b/libxfs/libxfs_api_defs.h index 9d2084e2..ccc92a83 100644 --- a/libxfs/libxfs_api_defs.h +++ b/libxfs/libxfs_api_defs.h @@ -44,6 +44,7 @@ #define xfs_attr_set libxfs_attr_set #define xfs_attr_sf_firstentry libxfs_attr_sf_firstentry #define xfs_attr_shortform_verify libxfs_attr_shortform_verify +#define xfs_attr_hashname libxfs_attr_hashname #define __xfs_bmap_add_free __libxfs_bmap_add_free #define xfs_bmap_validate_extent libxfs_bmap_validate_extent diff --git a/libxfs/xfs_attr.c b/libxfs/xfs_attr.c index 30cf3688..aca65971 100644 --- a/libxfs/xfs_attr.c +++ b/libxfs/xfs_attr.c @@ -234,6 +234,16 @@ 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. * @@ -264,7 +274,8 @@ 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; @@ -938,7 +949,8 @@ 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/libxfs/xfs_attr.h b/libxfs/xfs_attr.h index af92cc57..30cf51f3 100644 --- a/libxfs/xfs_attr.h +++ b/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/libxfs/xfs_attr_leaf.c b/libxfs/xfs_attr_leaf.c index 663347b1..2459a1e7 100644 --- a/libxfs/xfs_attr_leaf.c +++ b/libxfs/xfs_attr_leaf.c @@ -909,8 +909,8 @@ 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/repair/attr_repair.c b/repair/attr_repair.c index 25588b3b..9c41cb21 100644 --- a/repair/attr_repair.c +++ b/repair/attr_repair.c @@ -492,8 +492,10 @@ process_leaf_attr_local( * ordering anyway in case both the name value and the * hashvalue were wrong but matched. Unlikely, however. */ - if (be32_to_cpu(entry->hashval) != libxfs_da_hashname( - &local->nameval[0], local->namelen) || + if (be32_to_cpu(entry->hashval) != + libxfs_attr_hashname(entry->flags, + &local->nameval[0], + local->namelen) || be32_to_cpu(entry->hashval) < last_hashval) { do_warn( _("bad hashvalue for attribute entry %d in attr block %u, inode %" PRIu64 "\n"), @@ -537,7 +539,8 @@ process_leaf_attr_remote( !libxfs_attr_namecheck(mp, remotep->name, remotep->namelen, flags) || be32_to_cpu(entry->hashval) != - libxfs_da_hashname((unsigned char *)&remotep->name[0], + libxfs_attr_hashname(entry->flags, + (unsigned char *)&remotep->name[0], remotep->namelen) || be32_to_cpu(entry->hashval) < last_hashval || be32_to_cpu(remotep->valueblk) == 0) {

[10/20] xfs: create separate name hash function for xattrs

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