inode->i_fop = &no_open_fops;
inode->__i_nlink = 1;
inode->i_opflags = 0;
+ if (sb->s_xattr)
+ inode->i_opflags |= IOP_XATTR;
i_uid_write(inode, 0);
i_gid_write(inode, 0);
atomic_set(&inode->i_writecount, 0);
{
struct hlist_head *head = inode_hashtable + hash(sb, hashval);
struct inode *inode;
-
+again:
spin_lock(&inode_hash_lock);
inode = find_inode(sb, head, test, data);
spin_unlock(&inode_hash_lock);
if (inode) {
wait_on_inode(inode);
+ if (unlikely(inode_unhashed(inode))) {
+ iput(inode);
+ goto again;
+ }
return inode;
}
destroy_inode(inode);
inode = old;
wait_on_inode(inode);
+ if (unlikely(inode_unhashed(inode))) {
+ iput(inode);
+ goto again;
+ }
}
return inode;
{
struct hlist_head *head = inode_hashtable + hash(sb, ino);
struct inode *inode;
-
+again:
spin_lock(&inode_hash_lock);
inode = find_inode_fast(sb, head, ino);
spin_unlock(&inode_hash_lock);
if (inode) {
wait_on_inode(inode);
+ if (unlikely(inode_unhashed(inode))) {
+ iput(inode);
+ goto again;
+ }
return inode;
}
destroy_inode(inode);
inode = old;
wait_on_inode(inode);
+ if (unlikely(inode_unhashed(inode))) {
+ iput(inode);
+ goto again;
+ }
}
return inode;
}
struct inode *ilookup5(struct super_block *sb, unsigned long hashval,
int (*test)(struct inode *, void *), void *data)
{
- struct inode *inode = ilookup5_nowait(sb, hashval, test, data);
-
- if (inode)
+ struct inode *inode;
+again:
+ inode = ilookup5_nowait(sb, hashval, test, data);
+ if (inode) {
wait_on_inode(inode);
+ if (unlikely(inode_unhashed(inode))) {
+ iput(inode);
+ goto again;
+ }
+ }
return inode;
}
EXPORT_SYMBOL(ilookup5);
{
struct hlist_head *head = inode_hashtable + hash(sb, ino);
struct inode *inode;
-
+again:
spin_lock(&inode_hash_lock);
inode = find_inode_fast(sb, head, ino);
spin_unlock(&inode_hash_lock);
- if (inode)
+ if (inode) {
wait_on_inode(inode);
+ if (unlikely(inode_unhashed(inode))) {
+ iput(inode);
+ goto again;
+ }
+ }
return inode;
}
EXPORT_SYMBOL(ilookup);
}
EXPORT_SYMBOL(bmap);
+/*
+ * Update times in overlayed inode from underlying real inode
+ */
+static void update_ovl_inode_times(struct dentry *dentry, struct inode *inode,
+ bool rcu)
+{
+ if (!rcu) {
+ struct inode *realinode = d_real_inode(dentry);
+
+ if (unlikely(inode != realinode) &&
+ (!timespec_equal(&inode->i_mtime, &realinode->i_mtime) ||
+ !timespec_equal(&inode->i_ctime, &realinode->i_ctime))) {
+ inode->i_mtime = realinode->i_mtime;
+ inode->i_ctime = realinode->i_ctime;
+ }
+ }
+}
+
/*
* With relative atime, only update atime if the previous atime is
* earlier than either the ctime or mtime or if at least a day has
* passed since the last atime update.
*/
-static int relatime_need_update(struct vfsmount *mnt, struct inode *inode,
- struct timespec now)
+static int relatime_need_update(const struct path *path, struct inode *inode,
+ struct timespec now, bool rcu)
{
- if (!(mnt->mnt_flags & MNT_RELATIME))
+ if (!(path->mnt->mnt_flags & MNT_RELATIME))
return 1;
+
+ update_ovl_inode_times(path->dentry, inode, rcu);
/*
* Is mtime younger than atime? If yes, update atime:
*/
* This function automatically handles read only file systems and media,
* as well as the "noatime" flag and inode specific "noatime" markers.
*/
-bool atime_needs_update(const struct path *path, struct inode *inode)
+bool __atime_needs_update(const struct path *path, struct inode *inode,
+ bool rcu)
{
struct vfsmount *mnt = path->mnt;
struct timespec now;
if ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))
return false;
- now = current_fs_time(inode->i_sb);
+ now = current_time(inode);
- if (!relatime_need_update(mnt, inode, now))
+ if (!relatime_need_update(path, inode, now, rcu))
return false;
if (timespec_equal(&inode->i_atime, &now))
struct inode *inode = d_inode(path->dentry);
struct timespec now;
- if (!atime_needs_update(path, inode))
+ if (!__atime_needs_update(path, inode, false))
return;
if (!sb_start_write_trylock(inode->i_sb))
* We may also fail on filesystems that have the ability to make parts
* of the fs read only, e.g. subvolumes in Btrfs.
*/
- now = current_fs_time(inode->i_sb);
+ now = current_time(inode);
update_time(inode, &now, S_ATIME);
__mnt_drop_write(mnt);
skip_update:
if (IS_NOCMTIME(inode))
return 0;
- now = current_fs_time(inode->i_sb);
+ now = current_time(inode);
if (!timespec_equal(&inode->i_mtime, &now))
sync_it = S_MTIME;
mapping_set_gfp_mask(inode->i_mapping, GFP_USER);
}
EXPORT_SYMBOL(inode_nohighmem);
+
+/**
+ * current_time - Return FS time
+ * @inode: inode.
+ *
+ * Return the current time truncated to the time granularity supported by
+ * the fs.
+ *
+ * Note that inode and inode->sb cannot be NULL.
+ * Otherwise, the function warns and returns time without truncation.
+ */
+struct timespec current_time(struct inode *inode)
+{
+ struct timespec now = current_kernel_time();
+
+ if (unlikely(!inode->i_sb)) {
+ WARN(1, "current_time() called with uninitialized super_block in the inode");
+ return now;
+ }
+
+ return timespec_trunc(now, inode->i_sb->s_time_gran);
+}
+EXPORT_SYMBOL(current_time);