From 321290241e84a3a2cfc30b65fc6e79ecd266e420 Mon Sep 17 00:00:00 2001 From: David Oberhollenzer Date: Sun, 21 Jul 2019 13:30:34 +0200 Subject: Keep track of xattr key & value references AFTER deduplication This commit adds a reference count functionality to the string table implementation and uses this functionality in the fstree code to count how often each key and value is referenced by the deduplicated Xattr blocks. This is needed to support deduplication through out-of-band storage of xattrs. Signed-off-by: David Oberhollenzer --- lib/fstree/xattr.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) (limited to 'lib/fstree') diff --git a/lib/fstree/xattr.c b/lib/fstree/xattr.c index 38f7703..4597d9d 100644 --- a/lib/fstree/xattr.c +++ b/lib/fstree/xattr.c @@ -102,11 +102,24 @@ static int cmp_u64(const void *lhs, const void *rhs) void fstree_xattr_reindex(fstree_t *fs) { + uint32_t key_idx, value_idx; + size_t i, index = 0; tree_xattr_t *it; - size_t index = 0; - for (it = fs->xattr; it != NULL; it = it->next) + str_table_reset_ref_count(&fs->xattr_keys); + str_table_reset_ref_count(&fs->xattr_values); + + for (it = fs->xattr; it != NULL; it = it->next) { it->index = index++; + + for (i = 0; i < it->num_attr; ++i) { + key_idx = (it->ref[i] >> 32) & 0x00000000FFFFFFFF; + value_idx = it->ref[i] & 0x00000000FFFFFFFF; + + str_table_add_ref(&fs->xattr_keys, key_idx); + str_table_add_ref(&fs->xattr_values, value_idx); + } + } } void fstree_xattr_deduplicate(fstree_t *fs) -- cgit v1.2.3