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authorVyacheslav Dubeyko <slava@dubeyko.com>2013-11-13 03:11:09 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2013-11-13 07:09:32 +0400
commit95e0d7dbb9b28ab0dfad7c7316066b05e1f1d4cd (patch)
tree09f42df8169a4fbf3e2f60cb1b36c1e83c8d9019 /fs/hfsplus/super.c
parent099e9245e04d50bb12ed621b4fa61df0a4c9dba9 (diff)
downloadlinux-95e0d7dbb9b28ab0dfad7c7316066b05e1f1d4cd.tar.xz
hfsplus: implement attributes file creation functionality
Implement functionality of creation AttributesFile metadata file on HFS+ volume in the case of absence of it. It makes trying to open AttributesFile's B-tree during mount of HFS+ volume. If HFS+ volume hasn't AttributesFile then a pointer on AttributesFile's B-tree keeps as NULL. Thereby, when it is discovered absence of AttributesFile on HFS+ volume in the begin of xattr creation operation then AttributesFile will be created. The creation of AttributesFile will have success in the case of availability (2 * clump) free blocks on HFS+ volume. Otherwise, creation operation is ended with error (-ENOSPC). Signed-off-by: Vyacheslav Dubeyko <slava@dubeyko.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@infradead.org> Acked-by: Hin-Tak Leung <htl10@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/hfsplus/super.c')
-rw-r--r--fs/hfsplus/super.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index 4c4d142cf890..80875aa640ef 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -474,12 +474,14 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
pr_err("failed to load catalog file\n");
goto out_close_ext_tree;
}
+ atomic_set(&sbi->attr_tree_state, HFSPLUS_EMPTY_ATTR_TREE);
if (vhdr->attr_file.total_blocks != 0) {
sbi->attr_tree = hfs_btree_open(sb, HFSPLUS_ATTR_CNID);
if (!sbi->attr_tree) {
pr_err("failed to load attributes file\n");
goto out_close_cat_tree;
}
+ atomic_set(&sbi->attr_tree_state, HFSPLUS_VALID_ATTR_TREE);
}
sb->s_xattr = hfsplus_xattr_handlers;