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| author | Al Viro <viro@zeniv.linux.org.uk> | 2018-05-03 09:45:06 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2018-05-26 14:20:50 -0400 |
| commit | 888e2b03ef56694290e58bd9ac23f8033bf6369f (patch) | |
| tree | 71b2bfef0e1a8c09b47ceac8d1f94411499e5c94 | |
| parent | 0168b9e38c4213e162b15444c071d4198ff470e8 (diff) | |
| download | linux-888e2b03ef56694290e58bd9ac23f8033bf6369f.tar.bz2 | |
switch the rest of procfs lookups to d_splice_alias()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | fs/proc/generic.c | 3 | ||||
| -rw-r--r-- | fs/proc/proc_sysctl.c | 15 |
2 files changed, 13 insertions, 5 deletions
diff --git a/fs/proc/generic.c b/fs/proc/generic.c index 2078e70e1595..b77034a694ef 100644 --- a/fs/proc/generic.c +++ b/fs/proc/generic.c @@ -256,8 +256,7 @@ struct dentry *proc_lookup_de(struct inode *dir, struct dentry *dentry, if (!inode) return ERR_PTR(-ENOMEM); d_set_d_op(dentry, &proc_misc_dentry_ops); - d_add(dentry, inode); - return NULL; + return d_splice_alias(inode, dentry); } read_unlock(&proc_subdir_lock); return ERR_PTR(-ENOENT); diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c index 8989936f2995..4d765e5e91ed 100644 --- a/fs/proc/proc_sysctl.c +++ b/fs/proc/proc_sysctl.c @@ -554,9 +554,8 @@ static struct dentry *proc_sys_lookup(struct inode *dir, struct dentry *dentry, if (!inode) goto out; - err = NULL; d_set_d_op(dentry, &proc_sys_dentry_operations); - d_add(dentry, inode); + err = d_splice_alias(inode, dentry); out: if (h) @@ -684,6 +683,7 @@ static bool proc_sys_fill_cache(struct file *file, if (IS_ERR(child)) return false; if (d_in_lookup(child)) { + struct dentry *res; inode = proc_sys_make_inode(dir->d_sb, head, table); if (!inode) { d_lookup_done(child); @@ -691,7 +691,16 @@ static bool proc_sys_fill_cache(struct file *file, return false; } d_set_d_op(child, &proc_sys_dentry_operations); - d_add(child, inode); + res = d_splice_alias(inode, child); + d_lookup_done(child); + if (unlikely(res)) { + if (IS_ERR(res)) { + dput(child); + return false; + } + dput(child); + child = res; + } } } inode = d_inode(child); |