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authorLinus Torvalds <torvalds@linux-foundation.org>2010-08-11 09:23:32 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-11 09:23:32 -0700
commit5af568cbd55f60b5a1d174f621b273e4f585dc35 (patch)
tree7cdc1afeb267519133a29ac595df21278c556c8c /fs/proc
parent062e27ec1b49d12bdb1ecc94d74b5fee5a5775db (diff)
parent66a362a2aa8ffa72670259fa15e2a77a01cc2217 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: isofs: Fix lseek() to position beyond 4 GB vfs: remove unused MNT_STRICTATIME vfs: show unreachable paths in getcwd and proc vfs: only add " (deleted)" where necessary vfs: add prepend_path() helper vfs: __d_path: dont prepend the name of the root dentry ia64: perfmon: add d_dname method vfs: add helpers to get root and pwd cachefiles: use path_get instead of lone dget fs/sysv/super.c: add support for non-PDP11 v7 filesystems V7: Adjust sanity checks for some volumes Add v7 alias v9fs: fixup for inode_setattr being removed Manual merge to take Al's version of the fs/sysv/super.c file: it merged cleanly, but Al had removed an unnecessary header include, so his side was better.
Diffstat (limited to 'fs/proc')
-rw-r--r--fs/proc/base.c24
1 files changed, 12 insertions, 12 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index c806dfb24e0..a1c43e7c8a7 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -149,18 +149,13 @@ static unsigned int pid_entry_count_dirs(const struct pid_entry *entries,
return count;
}
-static int get_fs_path(struct task_struct *task, struct path *path, bool root)
+static int get_task_root(struct task_struct *task, struct path *root)
{
- struct fs_struct *fs;
int result = -ENOENT;
task_lock(task);
- fs = task->fs;
- if (fs) {
- read_lock(&fs->lock);
- *path = root ? fs->root : fs->pwd;
- path_get(path);
- read_unlock(&fs->lock);
+ if (task->fs) {
+ get_fs_root(task->fs, root);
result = 0;
}
task_unlock(task);
@@ -173,7 +168,12 @@ static int proc_cwd_link(struct inode *inode, struct path *path)
int result = -ENOENT;
if (task) {
- result = get_fs_path(task, path, 0);
+ task_lock(task);
+ if (task->fs) {
+ get_fs_pwd(task->fs, path);
+ result = 0;
+ }
+ task_unlock(task);
put_task_struct(task);
}
return result;
@@ -185,7 +185,7 @@ static int proc_root_link(struct inode *inode, struct path *path)
int result = -ENOENT;
if (task) {
- result = get_fs_path(task, path, 1);
+ result = get_task_root(task, path);
put_task_struct(task);
}
return result;
@@ -597,7 +597,7 @@ static int mounts_open_common(struct inode *inode, struct file *file,
get_mnt_ns(ns);
}
rcu_read_unlock();
- if (ns && get_fs_path(task, &root, 1) == 0)
+ if (ns && get_task_root(task, &root) == 0)
ret = 0;
put_task_struct(task);
}
@@ -1526,7 +1526,7 @@ static int do_proc_readlink(struct path *path, char __user *buffer, int buflen)
if (!tmp)
return -ENOMEM;
- pathname = d_path(path, tmp, PAGE_SIZE);
+ pathname = d_path_with_unreachable(path, tmp, PAGE_SIZE);
len = PTR_ERR(pathname);
if (IS_ERR(pathname))
goto out;