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| author | Al Viro <viro@zeniv.linux.org.uk> | 2020-01-09 22:12:40 +0300 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2020-02-27 22:43:56 +0300 |
| commit | 239eb983383b1b140e588fe8f1c7d1ce953285f6 (patch) | |
| tree | d29fd0ea84a07e0264c5f63a2c445a0a48612873 | |
| parent | bd7c4b508344680c843e2d2436d56b9fc8aedc9d (diff) | |
| download | linux-239eb983383b1b140e588fe8f1c7d1ce953285f6.tar.xz | |
atomic_open(): saner calling conventions (return dentry on success)
Currently it either returns -E... or puts (nd->path.mnt,dentry)
into *path and returns 0. Make it return ERR_PTR(-E...) or
dentry; adjust the caller. Fewer arguments and it's easier
to keep track of *path contents that way.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | fs/namei.c | 41 |
1 files changed, 24 insertions, 17 deletions
diff --git a/fs/namei.c b/fs/namei.c index c104ec75faef..5f8b791a6d6e 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -3087,10 +3087,10 @@ static int may_o_create(const struct path *dir, struct dentry *dentry, umode_t m * * Returns an error code otherwise. */ -static int atomic_open(struct nameidata *nd, struct dentry *dentry, - struct path *path, struct file *file, - const struct open_flags *op, - int open_flag, umode_t mode) +static struct dentry *atomic_open(struct nameidata *nd, struct dentry *dentry, + struct file *file, + const struct open_flags *op, + int open_flag, umode_t mode) { struct dentry *const DENTRY_NOT_SET = (void *) -1UL; struct inode *dir = nd->path.dentry->d_inode; @@ -3131,17 +3131,15 @@ static int atomic_open(struct nameidata *nd, struct dentry *dentry, } if (file->f_mode & FMODE_CREATED) fsnotify_create(dir, dentry); - if (unlikely(d_is_negative(dentry))) { + if (unlikely(d_is_negative(dentry))) error = -ENOENT; - } else { - path->dentry = dentry; - path->mnt = nd->path.mnt; - return 0; - } } } - dput(dentry); - return error; + if (error) { + dput(dentry); + dentry = ERR_PTR(error); + } + return dentry; } /* @@ -3236,11 +3234,20 @@ static int lookup_open(struct nameidata *nd, struct path *path, } if (dir_inode->i_op->atomic_open) { - error = atomic_open(nd, dentry, path, file, op, open_flag, - mode); - if (unlikely(error == -ENOENT) && create_error) - error = create_error; - return error; + dentry = atomic_open(nd, dentry, file, op, open_flag, mode); + if (IS_ERR(dentry)) { + error = PTR_ERR(dentry); + if (unlikely(error == -ENOENT) && create_error) + error = create_error; + return error; + } + if (file->f_mode & FMODE_OPENED) { + dput(dentry); + return 0; + } + path->mnt = nd->path.mnt; + path->dentry = dentry; + return 0; } no_open: |