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| author | Dominique Martinet <asmadeus@codewreck.org> | 2022-06-12 16:05:39 +0900 |
|---|---|---|
| committer | Dominique Martinet <dominique.martinet@atmark-techno.com> | 2022-07-02 18:52:21 +0900 |
| commit | dafbe689736f62c696ac64809b17bdc752cfbe76 (patch) | |
| tree | 8a4774deab90c8ae0255de0eed33f57c86433354 /fs/9p/fid.c | |
| parent | 286c171b86ebc693e18b485dde3a3fc470af37bd (diff) | |
| download | linux-dafbe689736f62c696ac64809b17bdc752cfbe76.tar.gz linux-dafbe689736f62c696ac64809b17bdc752cfbe76.tar.bz2 linux-dafbe689736f62c696ac64809b17bdc752cfbe76.zip | |
9p fid refcount: cleanup p9_fid_put calls
Simplify p9_fid_put cleanup path in many 9p functions since the function
is noop on null or error fids.
Also make the *_add_fid() helpers "steal" the fid by nulling its
pointer, so put after them will be noop.
This should lead to no change of behaviour
Link: https://lkml.kernel.org/r/20220612085330.1451496-7-asmadeus@codewreck.org
Reviewed-by: Tyler Hicks <tyhicks@linux.microsoft.com>
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
Diffstat (limited to 'fs/9p/fid.c')
| -rw-r--r-- | fs/9p/fid.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/fs/9p/fid.c b/fs/9p/fid.c index d792499349c4..289a85eae2ae 100644 --- a/fs/9p/fid.c +++ b/fs/9p/fid.c @@ -31,11 +31,15 @@ static inline void __add_fid(struct dentry *dentry, struct p9_fid *fid) * @fid: fid to add * */ -void v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid) +void v9fs_fid_add(struct dentry *dentry, struct p9_fid **pfid) { + struct p9_fid *fid = *pfid; + spin_lock(&dentry->d_lock); __add_fid(dentry, fid); spin_unlock(&dentry->d_lock); + + *pfid = NULL; } /** @@ -72,11 +76,15 @@ static struct p9_fid *v9fs_fid_find_inode(struct inode *inode, kuid_t uid) * */ -void v9fs_open_fid_add(struct inode *inode, struct p9_fid *fid) +void v9fs_open_fid_add(struct inode *inode, struct p9_fid **pfid) { + struct p9_fid *fid = *pfid; + spin_lock(&inode->i_lock); hlist_add_head(&fid->ilist, (struct hlist_head *)&inode->i_private); spin_unlock(&inode->i_lock); + + *pfid = NULL; } @@ -189,13 +197,13 @@ static struct p9_fid *v9fs_fid_lookup_with_uid(struct dentry *dentry, else uname = v9ses->uname; - root_fid = p9_client_attach(v9ses->clnt, NULL, uname, uid, - v9ses->aname); - if (IS_ERR(root_fid)) - return root_fid; + fid = p9_client_attach(v9ses->clnt, NULL, uname, uid, + v9ses->aname); + if (IS_ERR(fid)) + return fid; - p9_fid_get(root_fid); - v9fs_fid_add(dentry->d_sb->s_root, root_fid); + root_fid = p9_fid_get(fid); + v9fs_fid_add(dentry->d_sb->s_root, &fid); } /* If we are root ourself just return that */ if (dentry->d_sb->s_root == dentry) |