diff options
Diffstat (limited to 'drivers/base/devtmpfs.c')
-rw-r--r-- | drivers/base/devtmpfs.c | 72 |
1 files changed, 33 insertions, 39 deletions
diff --git a/drivers/base/devtmpfs.c b/drivers/base/devtmpfs.c index 03a7c7902fcd..6dd1a8860f1c 100644 --- a/drivers/base/devtmpfs.c +++ b/drivers/base/devtmpfs.c @@ -175,18 +175,17 @@ static int dev_mkdir(const char *name, umode_t mode) { struct dentry *dentry; struct path path; - int err; dentry = kern_path_create(AT_FDCWD, name, &path, LOOKUP_DIRECTORY); if (IS_ERR(dentry)) return PTR_ERR(dentry); - err = vfs_mkdir(&nop_mnt_idmap, d_inode(path.dentry), dentry, mode); - if (!err) + dentry = vfs_mkdir(&nop_mnt_idmap, d_inode(path.dentry), dentry, mode); + if (!IS_ERR(dentry)) /* mark as kernel-created inode */ d_inode(dentry)->i_private = &thread; done_path_create(&path, dentry); - return err; + return PTR_ERR_OR_ZERO(dentry); } static int create_path(const char *nodepath) @@ -260,15 +259,12 @@ static int dev_rmdir(const char *name) dentry = kern_path_locked(name, &parent); if (IS_ERR(dentry)) return PTR_ERR(dentry); - if (d_really_is_positive(dentry)) { - if (d_inode(dentry)->i_private == &thread) - err = vfs_rmdir(&nop_mnt_idmap, d_inode(parent.dentry), - dentry); - else - err = -EPERM; - } else { - err = -ENOENT; - } + if (d_inode(dentry)->i_private == &thread) + err = vfs_rmdir(&nop_mnt_idmap, d_inode(parent.dentry), + dentry); + else + err = -EPERM; + dput(dentry); inode_unlock(d_inode(parent.dentry)); path_put(&parent); @@ -325,6 +321,8 @@ static int handle_remove(const char *nodename, struct device *dev) { struct path parent; struct dentry *dentry; + struct kstat stat; + struct path p; int deleted = 0; int err; @@ -332,32 +330,28 @@ static int handle_remove(const char *nodename, struct device *dev) if (IS_ERR(dentry)) return PTR_ERR(dentry); - if (d_really_is_positive(dentry)) { - struct kstat stat; - struct path p = {.mnt = parent.mnt, .dentry = dentry}; - err = vfs_getattr(&p, &stat, STATX_TYPE | STATX_MODE, - AT_STATX_SYNC_AS_STAT); - if (!err && dev_mynode(dev, d_inode(dentry), &stat)) { - struct iattr newattrs; - /* - * before unlinking this node, reset permissions - * of possible references like hardlinks - */ - newattrs.ia_uid = GLOBAL_ROOT_UID; - newattrs.ia_gid = GLOBAL_ROOT_GID; - newattrs.ia_mode = stat.mode & ~0777; - newattrs.ia_valid = - ATTR_UID|ATTR_GID|ATTR_MODE; - inode_lock(d_inode(dentry)); - notify_change(&nop_mnt_idmap, dentry, &newattrs, NULL); - inode_unlock(d_inode(dentry)); - err = vfs_unlink(&nop_mnt_idmap, d_inode(parent.dentry), - dentry, NULL); - if (!err || err == -ENOENT) - deleted = 1; - } - } else { - err = -ENOENT; + p.mnt = parent.mnt; + p.dentry = dentry; + err = vfs_getattr(&p, &stat, STATX_TYPE | STATX_MODE, + AT_STATX_SYNC_AS_STAT); + if (!err && dev_mynode(dev, d_inode(dentry), &stat)) { + struct iattr newattrs; + /* + * before unlinking this node, reset permissions + * of possible references like hardlinks + */ + newattrs.ia_uid = GLOBAL_ROOT_UID; + newattrs.ia_gid = GLOBAL_ROOT_GID; + newattrs.ia_mode = stat.mode & ~0777; + newattrs.ia_valid = + ATTR_UID|ATTR_GID|ATTR_MODE; + inode_lock(d_inode(dentry)); + notify_change(&nop_mnt_idmap, dentry, &newattrs, NULL); + inode_unlock(d_inode(dentry)); + err = vfs_unlink(&nop_mnt_idmap, d_inode(parent.dentry), + dentry, NULL); + if (!err || err == -ENOENT) + deleted = 1; } dput(dentry); inode_unlock(d_inode(parent.dentry)); |