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Code Issues Releases Wiki Activity

reserve_stack(): switch to __nd_alloc_stack() 

expand the call of nd_alloc_stack() into it (and don't
recheck the depth on the second call)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2020-03-03 11:25:31 -05:00
parent 49055906af
commit 4542576b79
1 changed files with 8 additions and 11 deletions
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19
fs/namei.c
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@ -566,15 +566,6 @@ static bool path_connected(struct vfsmount *mnt, struct dentry *dentry)
return is_subdir(dentry, mnt->mnt_root);
}
static inline int nd_alloc_stack(struct nameidata *nd)
{
if (likely(nd->depth != EMBEDDED_LEVELS))
return 0;
if (likely(nd->stack != nd->internal))
return 0;
return __nd_alloc_stack(nd);
}
static void drop_links(struct nameidata *nd)
{
int i = nd->depth;
@ -1586,7 +1577,13 @@ static int reserve_stack(struct nameidata *nd, struct path *link, unsigned seq)
if (unlikely(nd->total_link_count++ >= MAXSYMLINKS))
return -ELOOP;
error = nd_alloc_stack(nd);
if (likely(nd->depth != EMBEDDED_LEVELS))
return 0;
if (likely(nd->stack != nd->internal))
return 0;
error = __nd_alloc_stack(nd);
if (likely(!error))
return 0;
if (error == -ECHILD) {
@ -1597,7 +1594,7 @@ static int reserve_stack(struct nameidata *nd, struct path *link, unsigned seq)
if (unlikely(!grabbed_link))
error = -ECHILD;
if (!error)
error = nd_alloc_stack(nd);
error = __nd_alloc_stack(nd);
}
return error;
}