From c5971b8c6354a95c9ee7eb722928af5000bac247 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Thu, 5 Mar 2020 11:41:29 -0500 Subject: take post-lookup part of do_last() out of loop now we can have open_last_lookups() directly from the loop in path_openat() - the rest of do_last() never returns a symlink to follow, so we can bloody well leave the loop first. Rename the rest of that thing from do_last() to do_open() and make it return an int. Signed-off-by: Al Viro --- fs/namei.c | 21 +++++++++------------ 1 file changed, 9 insertions(+), 12 deletions(-) (limited to 'fs') diff --git a/fs/namei.c b/fs/namei.c index e737d884592d..329ade345e62 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -3220,31 +3220,26 @@ finish_lookup: /* * Handle the last step of open() */ -static const char *do_last(struct nameidata *nd, +static int do_open(struct nameidata *nd, struct file *file, const struct open_flags *op) { int open_flag = op->open_flag; bool do_truncate; int acc_mode; - const char *link; int error; - link = open_last_lookups(nd, file, op); - if (unlikely(link)) - return link; - if (!(file->f_mode & FMODE_CREATED)) audit_inode(nd->name, nd->path.dentry, 0); if (open_flag & O_CREAT) { if (d_is_dir(nd->path.dentry)) - return ERR_PTR(-EISDIR); + return -EISDIR; error = may_create_in_sticky(nd->dir_mode, nd->dir_uid, d_backing_inode(nd->path.dentry)); if (unlikely(error)) - return ERR_PTR(error); + return error; } if ((nd->flags & LOOKUP_DIRECTORY) && !d_can_lookup(nd->path.dentry)) - return ERR_PTR(-ENOTDIR); + return -ENOTDIR; do_truncate = false; acc_mode = op->acc_mode; @@ -3255,7 +3250,7 @@ static const char *do_last(struct nameidata *nd, } else if (d_is_reg(nd->path.dentry) && open_flag & O_TRUNC) { error = mnt_want_write(nd->path.mnt); if (error) - return ERR_PTR(error); + return error; do_truncate = true; } error = may_open(&nd->path, acc_mode, open_flag); @@ -3271,7 +3266,7 @@ static const char *do_last(struct nameidata *nd, } if (do_truncate) mnt_drop_write(nd->path.mnt); - return ERR_PTR(error); + return error; } struct dentry *vfs_tmpfile(struct dentry *dentry, umode_t mode, int open_flag) @@ -3374,8 +3369,10 @@ static struct file *path_openat(struct nameidata *nd, } else { const char *s = path_init(nd, flags); while (!(error = link_path_walk(s, nd)) && - (s = do_last(nd, file, op)) != NULL) + (s = open_last_lookups(nd, file, op)) != NULL) ; + if (!error) + error = do_open(nd, file, op); terminate_walk(nd); } if (likely(!error)) { -- cgit 1.4.1