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authorAl Viro <viro@zeniv.linux.org.uk>2011-03-10 07:04:47 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2011-03-14 16:15:27 +0300
commit5b6ca027d85b7438c84b78a54ccdc2e53f2909cd (patch)
treee35b870101fbc6a2ea6e0399429d9c23707697f3 /include/linux
parent5a18fff2090c3af830d699c8ccb230498a1e37e5 (diff)
downloadlinux-5b6ca027d85b7438c84b78a54ccdc2e53f2909cd.tar.xz
reduce vfs_path_lookup() to do_path_lookup()
New lookup flag: LOOKUP_ROOT. nd->root is set (and held) by caller, path_init() starts walking from that place and all pathname resolution machinery never drops nd->root if that flag is set. That turns vfs_path_lookup() into a special case of do_path_lookup() *and* gets us down to 3 callers of link_path_walk(), making it finally feasible to rip the handling of trailing symlink out of link_path_walk(). That will not only simply the living hell out of it, but make life much simpler for unionfs merge. Trailing symlink handling will become iterative, which is a good thing for stack footprint in a lot of situations as well. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/namei.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/namei.h b/include/linux/namei.h
index 72ffd62ac736..83cd6e5cd7dc 100644
--- a/include/linux/namei.h
+++ b/include/linux/namei.h
@@ -63,6 +63,7 @@ enum {LAST_NORM, LAST_ROOT, LAST_DOT, LAST_DOTDOT, LAST_BIND};
#define LOOKUP_RENAME_TARGET 0x0800
#define LOOKUP_JUMPED 0x1000
+#define LOOKUP_ROOT 0x2000
extern int user_path_at(int, const char __user *, unsigned, struct path *);