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authorAl Viro <viro@zeniv.linux.org.uk>2011-03-11 12:08:24 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2011-03-14 09:15:28 -0400
commit73d049a40fc6269189c4e2ba6792cb5dd054883c (patch)
treea713747cd06926ad89bfa9b36ea13dd20bbc507f /arch/um/drivers/mconsole_kern.c
parent5b6ca027d85b7438c84b78a54ccdc2e53f2909cd (diff)
open-style analog of vfs_path_lookup()
new function: file_open_root(dentry, mnt, name, flags) opens the file vfs_path_lookup would arrive to. Note that name can be empty; in that case the usual requirement that dentry should be a directory is lifted. open-coded equivalents switched to it, may_open() got down exactly one caller and became static. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/um/drivers/mconsole_kern.c')
-rw-r--r--arch/um/drivers/mconsole_kern.c21
1 files changed, 2 insertions, 19 deletions
diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c
index 975613b23dcf..c70e047eed72 100644
--- a/arch/um/drivers/mconsole_kern.c
+++ b/arch/um/drivers/mconsole_kern.c
@@ -124,35 +124,18 @@ void mconsole_log(struct mc_request *req)
124#if 0 124#if 0
125void mconsole_proc(struct mc_request *req) 125void mconsole_proc(struct mc_request *req)
126{ 126{
127 struct nameidata nd;
128 struct vfsmount *mnt = current->nsproxy->pid_ns->proc_mnt; 127 struct vfsmount *mnt = current->nsproxy->pid_ns->proc_mnt;
129 struct file *file; 128 struct file *file;
130 int n, err; 129 int n;
131 char *ptr = req->request.data, *buf; 130 char *ptr = req->request.data, *buf;
132 mm_segment_t old_fs = get_fs(); 131 mm_segment_t old_fs = get_fs();
133 132
134 ptr += strlen("proc"); 133 ptr += strlen("proc");
135 ptr = skip_spaces(ptr); 134 ptr = skip_spaces(ptr);
136 135
137 err = vfs_path_lookup(mnt->mnt_root, mnt, ptr, LOOKUP_FOLLOW, &nd); 136 file = file_open_root(mnt->mnt_root, mnt, ptr, O_RDONLY);
138 if (err) {
139 mconsole_reply(req, "Failed to look up file", 1, 0);
140 goto out;
141 }
142
143 err = may_open(&nd.path, MAY_READ, O_RDONLY);
144 if (result) {
145 mconsole_reply(req, "Failed to open file", 1, 0);
146 path_put(&nd.path);
147 goto out;
148 }
149
150 file = dentry_open(nd.path.dentry, nd.path.mnt, O_RDONLY,
151 current_cred());
152 err = PTR_ERR(file);
153 if (IS_ERR(file)) { 137 if (IS_ERR(file)) {
154 mconsole_reply(req, "Failed to open file", 1, 0); 138 mconsole_reply(req, "Failed to open file", 1, 0);
155 path_put(&nd.path);
156 goto out; 139 goto out;
157 } 140 }
158 141