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authorLinus Torvalds <torvalds@linux-foundation.org>2013-07-14 11:42:26 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-14 11:42:26 -0700
commit41d9884c44237cd66e2bdbc412028b29196b344c (patch)
tree7a386f6de2f07c01f87f3a16965c9bb8b40f63c1 /fs
parent63345b4794aef4ebe16502cfe35b02bc9822d763 (diff)
parentdae3794fd603b92dcbac2859fe0bc7fe129a5188 (diff)
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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull more vfs stuff from Al Viro: "O_TMPFILE ABI changes, Oleg's fput() series, misc cleanups, including making simple_lookup() usable for filesystems with non-NULL s_d_op, which allows us to get rid of quite a bit of ugliness" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: sunrpc: now we can just set ->s_d_op cgroup: we can use simple_lookup() now efivarfs: we can use simple_lookup() now make simple_lookup() usable for filesystems that set ->s_d_op configfs: don't open-code d_alloc_name() __rpc_lookup_create_exclusive: pass string instead of qstr rpc_create_*_dir: don't bother with qstr llist: llist_add() can use llist_add_batch() llist: fix/simplify llist_add() and llist_add_batch() fput: turn "list_head delayed_fput_list" into llist_head fs/file_table.c:fput(): add comment Safer ABI for O_TMPFILE
Diffstat (limited to 'fs')
-rw-r--r--fs/configfs/dir.c13
-rw-r--r--fs/efivarfs/inode.c14
-rw-r--r--fs/file_table.c31
-rw-r--r--fs/libfs.c3
-rw-r--r--fs/namei.c2
-rw-r--r--fs/open.c4
6 files changed, 24 insertions, 43 deletions
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index 5e7c60c1cb63..277bd1be21fd 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -660,19 +660,15 @@ static int create_default_group(struct config_group *parent_group,
struct config_group *group)
{
int ret;
- struct qstr name;
struct configfs_dirent *sd;
/* We trust the caller holds a reference to parent */
struct dentry *child, *parent = parent_group->cg_item.ci_dentry;
if (!group->cg_item.ci_name)
group->cg_item.ci_name = group->cg_item.ci_namebuf;
- name.name = group->cg_item.ci_name;
- name.len = strlen(name.name);
- name.hash = full_name_hash(name.name, name.len);
ret = -ENOMEM;
- child = d_alloc(parent, &name);
+ child = d_alloc_name(parent, group->cg_item.ci_name);
if (child) {
d_add(child, NULL);
@@ -1650,7 +1646,6 @@ int configfs_register_subsystem(struct configfs_subsystem *subsys)
{
int err;
struct config_group *group = &subsys->su_group;
- struct qstr name;
struct dentry *dentry;
struct dentry *root;
struct configfs_dirent *sd;
@@ -1667,12 +1662,8 @@ int configfs_register_subsystem(struct configfs_subsystem *subsys)
mutex_lock_nested(&root->d_inode->i_mutex, I_MUTEX_PARENT);
- name.name = group->cg_item.ci_name;
- name.len = strlen(name.name);
- name.hash = full_name_hash(name.name, name.len);
-
err = -ENOMEM;
- dentry = d_alloc(root, &name);
+ dentry = d_alloc_name(root, group->cg_item.ci_name);
if (dentry) {
d_add(dentry, NULL);
diff --git a/fs/efivarfs/inode.c b/fs/efivarfs/inode.c
index 7e787fb90293..07ab49745e31 100644
--- a/fs/efivarfs/inode.c
+++ b/fs/efivarfs/inode.c
@@ -155,20 +155,8 @@ static int efivarfs_unlink(struct inode *dir, struct dentry *dentry)
return 0;
};
-/*
- * Handle negative dentry.
- */
-static struct dentry *efivarfs_lookup(struct inode *dir, struct dentry *dentry,
- unsigned int flags)
-{
- if (dentry->d_name.len > NAME_MAX)
- return ERR_PTR(-ENAMETOOLONG);
- d_add(dentry, NULL);
- return NULL;
-}
-
const struct inode_operations efivarfs_dir_inode_operations = {
- .lookup = efivarfs_lookup,
+ .lookup = simple_lookup,
.unlink = efivarfs_unlink,
.create = efivarfs_create,
};
diff --git a/fs/file_table.c b/fs/file_table.c
index 08e719b884ca..b44e4c559786 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -265,18 +265,15 @@ static void __fput(struct file *file)
mntput(mnt);
}
-static DEFINE_SPINLOCK(delayed_fput_lock);
-static LIST_HEAD(delayed_fput_list);
+static LLIST_HEAD(delayed_fput_list);
static void delayed_fput(struct work_struct *unused)
{
- LIST_HEAD(head);
- spin_lock_irq(&delayed_fput_lock);
- list_splice_init(&delayed_fput_list, &head);
- spin_unlock_irq(&delayed_fput_lock);
- while (!list_empty(&head)) {
- struct file *f = list_first_entry(&head, struct file, f_u.fu_list);
- list_del_init(&f->f_u.fu_list);
- __fput(f);
+ struct llist_node *node = llist_del_all(&delayed_fput_list);
+ struct llist_node *next;
+
+ for (; node; node = next) {
+ next = llist_next(node);
+ __fput(llist_entry(node, struct file, f_u.fu_llist));
}
}
@@ -306,18 +303,22 @@ void fput(struct file *file)
{
if (atomic_long_dec_and_test(&file->f_count)) {
struct task_struct *task = current;
- unsigned long flags;
file_sb_list_del(file);
if (likely(!in_interrupt() && !(task->flags & PF_KTHREAD))) {
init_task_work(&file->f_u.fu_rcuhead, ____fput);
if (!task_work_add(task, &file->f_u.fu_rcuhead, true))
return;
+ /*
+ * After this task has run exit_task_work(),
+ * task_work_add() will fail. free_ipc_ns()->
+ * shm_destroy() can do this. Fall through to delayed
+ * fput to avoid leaking *file.
+ */
}
- spin_lock_irqsave(&delayed_fput_lock, flags);
- list_add(&file->f_u.fu_list, &delayed_fput_list);
- schedule_work(&delayed_fput_work);
- spin_unlock_irqrestore(&delayed_fput_lock, flags);
+
+ if (llist_add(&file->f_u.fu_llist, &delayed_fput_list))
+ schedule_work(&delayed_fput_work);
}
}
diff --git a/fs/libfs.c b/fs/libfs.c
index c3a0837fb861..3a3a9b53bf5a 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -61,7 +61,8 @@ struct dentry *simple_lookup(struct inode *dir, struct dentry *dentry, unsigned
if (dentry->d_name.len > NAME_MAX)
return ERR_PTR(-ENAMETOOLONG);
- d_set_d_op(dentry, &simple_dentry_operations);
+ if (!dentry->d_sb->s_d_op)
+ d_set_d_op(dentry, &simple_dentry_operations);
d_add(dentry, NULL);
return NULL;
}
diff --git a/fs/namei.c b/fs/namei.c
index b2beee7a733f..8b61d103a8a7 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2977,7 +2977,7 @@ static struct file *path_openat(int dfd, struct filename *pathname,
file->f_flags = op->open_flag;
- if (unlikely(file->f_flags & O_TMPFILE)) {
+ if (unlikely(file->f_flags & __O_TMPFILE)) {
error = do_tmpfile(dfd, pathname, nd, flags, op, file, &opened);
goto out;
}
diff --git a/fs/open.c b/fs/open.c
index fca72c4d3f17..9156cb050d08 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -840,8 +840,8 @@ static inline int build_open_flags(int flags, umode_t mode, struct open_flags *o
if (flags & __O_SYNC)
flags |= O_DSYNC;
- if (flags & O_TMPFILE) {
- if (!(flags & O_CREAT))
+ if (flags & __O_TMPFILE) {
+ if ((flags & O_TMPFILE_MASK) != O_TMPFILE)
return -EINVAL;
acc_mode = MAY_OPEN | ACC_MODE(flags);
} else if (flags & O_PATH) {