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| author | Tyler Hicks <tyhicks@linux.microsoft.com> | 2022-05-26 19:00:00 -0500 |
|---|---|---|
| committer | Dominique Martinet <dominique.martinet@atmark-techno.com> | 2022-07-02 18:52:21 +0900 |
| commit | cba83f47fc0ef52638870890e9e352afcc56dd73 (patch) | |
| tree | f28cdadf58209e309b3ac2d650186aadff26e6b3 /fs/9p/fid.c | |
| parent | 03c765b0e3b4cb5063276b086c76f7a612856a9a (diff) | |
| download | linux-stable-cba83f47fc0ef52638870890e9e352afcc56dd73.tar.gz linux-stable-cba83f47fc0ef52638870890e9e352afcc56dd73.tar.bz2 linux-stable-cba83f47fc0ef52638870890e9e352afcc56dd73.zip | |
9p: Track the root fid with its own variable during lookups
Improve readability by using a new variable when dealing with the root
fid. The root fid requires special handling in comparison to other fids
used during fid lookup.
Link: https://lkml.kernel.org/r/20220527000003.355812-3-tyhicks@linux.microsoft.com
Signed-off-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 | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/fs/9p/fid.c b/fs/9p/fid.c index baf2b152229e..056b2a7e1964 100644 --- a/fs/9p/fid.c +++ b/fs/9p/fid.c @@ -152,7 +152,7 @@ static struct p9_fid *v9fs_fid_lookup_with_uid(struct dentry *dentry, const unsigned char **wnames, *uname; int i, n, l, clone, access; struct v9fs_session_info *v9ses; - struct p9_fid *fid, *old_fid; + struct p9_fid *fid, *root_fid, *old_fid; v9ses = v9fs_dentry2v9ses(dentry); access = v9ses->flags & V9FS_ACCESS_MASK; @@ -178,8 +178,8 @@ static struct p9_fid *v9fs_fid_lookup_with_uid(struct dentry *dentry, up_read(&v9ses->rename_sem); /* start from the root and try to do a lookup */ - fid = v9fs_fid_find(dentry->d_sb->s_root, uid, any); - if (!fid) { + root_fid = v9fs_fid_find(dentry->d_sb->s_root, uid, any); + if (!root_fid) { /* the user is not attached to the fs yet */ if (access == V9FS_ACCESS_SINGLE) return ERR_PTR(-EPERM); @@ -189,17 +189,18 @@ static struct p9_fid *v9fs_fid_lookup_with_uid(struct dentry *dentry, else uname = v9ses->uname; - fid = p9_client_attach(v9ses->clnt, NULL, uname, uid, - v9ses->aname); - if (IS_ERR(fid)) - return fid; + root_fid = p9_client_attach(v9ses->clnt, NULL, uname, uid, + v9ses->aname); + if (IS_ERR(root_fid)) + return root_fid; - refcount_inc(&fid->count); - v9fs_fid_add(dentry->d_sb->s_root, fid); + refcount_inc(&root_fid->count); + v9fs_fid_add(dentry->d_sb->s_root, root_fid); } /* If we are root ourself just return that */ if (dentry->d_sb->s_root == dentry) - return fid; + return root_fid; + /* * Do a multipath walk with attached root. * When walking parent we need to make sure we @@ -211,7 +212,8 @@ static struct p9_fid *v9fs_fid_lookup_with_uid(struct dentry *dentry, fid = ERR_PTR(n); goto err_out; } - old_fid = fid; + fid = root_fid; + old_fid = root_fid; clone = 1; i = 0; while (i < n) { @@ -220,7 +222,7 @@ static struct p9_fid *v9fs_fid_lookup_with_uid(struct dentry *dentry, * We need to hold rename lock when doing a multipath * walk to ensure none of the patch component change */ - fid = p9_client_walk(fid, l, &wnames[i], clone); + fid = p9_client_walk(old_fid, l, &wnames[i], clone); /* non-cloning walk will return the same fid */ if (fid != old_fid) { p9_client_clunk(old_fid); |