diff options
Diffstat (limited to 'fs/kernfs')
| -rw-r--r-- | fs/kernfs/dir.c | 40 | ||||
| -rw-r--r-- | fs/kernfs/file.c | 5 | ||||
| -rw-r--r-- | fs/kernfs/kernfs-internal.h | 8 | ||||
| -rw-r--r-- | fs/kernfs/symlink.c | 5 |
4 files changed, 34 insertions, 24 deletions
diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c index 510b5062ef30..5104cf5d25c5 100644 --- a/fs/kernfs/dir.c +++ b/fs/kernfs/dir.c @@ -324,8 +324,9 @@ const struct dentry_operations kernfs_dops = { .d_release = kernfs_dop_release, }; -struct kernfs_node *kernfs_new_node(struct kernfs_root *root, const char *name, - umode_t mode, unsigned flags) +static struct kernfs_node *__kernfs_new_node(struct kernfs_root *root, + const char *name, umode_t mode, + unsigned flags) { char *dup_name = NULL; struct kernfs_node *kn; @@ -362,6 +363,20 @@ struct kernfs_node *kernfs_new_node(struct kernfs_root *root, const char *name, return NULL; } +struct kernfs_node *kernfs_new_node(struct kernfs_node *parent, + const char *name, umode_t mode, + unsigned flags) +{ + struct kernfs_node *kn; + + kn = __kernfs_new_node(kernfs_root(parent), name, mode, flags); + if (kn) { + kernfs_get(parent); + kn->parent = parent; + } + return kn; +} + /** * kernfs_addrm_start - prepare for kernfs_node add/remove * @acxt: pointer to kernfs_addrm_cxt to be used @@ -386,11 +401,10 @@ void kernfs_addrm_start(struct kernfs_addrm_cxt *acxt) * kernfs_add_one - add kernfs_node to parent without warning * @acxt: addrm context to use * @kn: kernfs_node to be added - * @parent: the parent kernfs_node to add @kn to * - * Get @parent and set @kn->parent to it and increment nlink of the - * parent inode if @kn is a directory and link into the children list - * of the parent. + * The caller must already have initialized @kn->parent. This + * function increments nlink of the parent's inode if @kn is a + * directory and link into the children list of the parent. * * This function should be called between calls to * kernfs_addrm_start() and kernfs_addrm_finish() and should be passed @@ -403,9 +417,9 @@ void kernfs_addrm_start(struct kernfs_addrm_cxt *acxt) * 0 on success, -EEXIST if entry with the given name already * exists. */ -int kernfs_add_one(struct kernfs_addrm_cxt *acxt, struct kernfs_node *kn, - struct kernfs_node *parent) +int kernfs_add_one(struct kernfs_addrm_cxt *acxt, struct kernfs_node *kn) { + struct kernfs_node *parent = kn->parent; bool has_ns = kernfs_ns_enabled(parent); struct kernfs_iattrs *ps_iattr; int ret; @@ -423,8 +437,6 @@ int kernfs_add_one(struct kernfs_addrm_cxt *acxt, struct kernfs_node *kn, return -ENOENT; kn->hash = kernfs_name_hash(kn->name, kn->ns); - kn->parent = parent; - kernfs_get(parent); ret = kernfs_link_sibling(kn); if (ret) @@ -600,7 +612,8 @@ struct kernfs_root *kernfs_create_root(struct kernfs_dir_ops *kdops, void *priv) ida_init(&root->ino_ida); - kn = kernfs_new_node(root, "", S_IFDIR | S_IRUGO | S_IXUGO, KERNFS_DIR); + kn = __kernfs_new_node(root, "", S_IFDIR | S_IRUGO | S_IXUGO, + KERNFS_DIR); if (!kn) { ida_destroy(&root->ino_ida); kfree(root); @@ -648,8 +661,7 @@ struct kernfs_node *kernfs_create_dir_ns(struct kernfs_node *parent, int rc; /* allocate */ - kn = kernfs_new_node(kernfs_root(parent), name, mode | S_IFDIR, - KERNFS_DIR); + kn = kernfs_new_node(parent, name, mode | S_IFDIR, KERNFS_DIR); if (!kn) return ERR_PTR(-ENOMEM); @@ -659,7 +671,7 @@ struct kernfs_node *kernfs_create_dir_ns(struct kernfs_node *parent, /* link in */ kernfs_addrm_start(&acxt); - rc = kernfs_add_one(&acxt, kn, parent); + rc = kernfs_add_one(&acxt, kn); kernfs_addrm_finish(&acxt); if (!rc) diff --git a/fs/kernfs/file.c b/fs/kernfs/file.c index bdd38854ef65..dbf397bfdff2 100644 --- a/fs/kernfs/file.c +++ b/fs/kernfs/file.c @@ -829,8 +829,7 @@ struct kernfs_node *__kernfs_create_file(struct kernfs_node *parent, if (name_is_static) flags |= KERNFS_STATIC_NAME; - kn = kernfs_new_node(kernfs_root(parent), name, - (mode & S_IALLUGO) | S_IFREG, flags); + kn = kernfs_new_node(parent, name, (mode & S_IALLUGO) | S_IFREG, flags); if (!kn) return ERR_PTR(-ENOMEM); @@ -857,7 +856,7 @@ struct kernfs_node *__kernfs_create_file(struct kernfs_node *parent, kn->flags |= KERNFS_HAS_MMAP; kernfs_addrm_start(&acxt); - rc = kernfs_add_one(&acxt, kn, parent); + rc = kernfs_add_one(&acxt, kn); kernfs_addrm_finish(&acxt); if (rc) { diff --git a/fs/kernfs/kernfs-internal.h b/fs/kernfs/kernfs-internal.h index c6ba5bc37a98..eb536b76374a 100644 --- a/fs/kernfs/kernfs-internal.h +++ b/fs/kernfs/kernfs-internal.h @@ -101,11 +101,11 @@ extern const struct inode_operations kernfs_dir_iops; struct kernfs_node *kernfs_get_active(struct kernfs_node *kn); void kernfs_put_active(struct kernfs_node *kn); void kernfs_addrm_start(struct kernfs_addrm_cxt *acxt); -int kernfs_add_one(struct kernfs_addrm_cxt *acxt, struct kernfs_node *kn, - struct kernfs_node *parent); +int kernfs_add_one(struct kernfs_addrm_cxt *acxt, struct kernfs_node *kn); void kernfs_addrm_finish(struct kernfs_addrm_cxt *acxt); -struct kernfs_node *kernfs_new_node(struct kernfs_root *root, const char *name, - umode_t mode, unsigned flags); +struct kernfs_node *kernfs_new_node(struct kernfs_node *parent, + const char *name, umode_t mode, + unsigned flags); /* * file.c diff --git a/fs/kernfs/symlink.c b/fs/kernfs/symlink.c index a03e26036ef9..4d457055acb9 100644 --- a/fs/kernfs/symlink.c +++ b/fs/kernfs/symlink.c @@ -30,8 +30,7 @@ struct kernfs_node *kernfs_create_link(struct kernfs_node *parent, struct kernfs_addrm_cxt acxt; int error; - kn = kernfs_new_node(kernfs_root(parent), name, S_IFLNK|S_IRWXUGO, - KERNFS_LINK); + kn = kernfs_new_node(parent, name, S_IFLNK|S_IRWXUGO, KERNFS_LINK); if (!kn) return ERR_PTR(-ENOMEM); @@ -41,7 +40,7 @@ struct kernfs_node *kernfs_create_link(struct kernfs_node *parent, kernfs_get(target); /* ref owned by symlink */ kernfs_addrm_start(&acxt); - error = kernfs_add_one(&acxt, kn, parent); + error = kernfs_add_one(&acxt, kn); kernfs_addrm_finish(&acxt); if (!error) |