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| author |   Al Viro <viro@zeniv.linux.org.uk> | 2011-03-09 23:04:47 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2011-03-14 09:15:27 -0400 |
| commit | 5b6ca027d85b7438c84b78a54ccdc2e53f2909cd (patch) | |
| tree | e35b870101fbc6a2ea6e0399429d9c23707697f3 /include/linux/namei.h | |
| parent | untangle do_lookup() (diff) | |
| download | wireguard-linux-5b6ca027d85b7438c84b78a54ccdc2e53f2909cd.tar.xz wireguard-linux-5b6ca027d85b7438c84b78a54ccdc2e53f2909cd.zip | |
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/namei.h')
| -rw-r--r-- | include/linux/namei.h | 1 |
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 *); |