diff options
Diffstat (limited to 'fs')
-rw-r--r-- | fs/autofs/autofs_i.h | 1 | ||||
-rw-r--r-- | fs/autofs/inode.c | 2 | ||||
-rw-r--r-- | fs/dcache.c | 24 | ||||
-rw-r--r-- | fs/internal.h | 2 | ||||
-rw-r--r-- | fs/nsfs.c | 3 |
5 files changed, 16 insertions, 16 deletions
diff --git a/fs/autofs/autofs_i.h b/fs/autofs/autofs_i.h index 70c132acdab1..e1091312abe1 100644 --- a/fs/autofs/autofs_i.h +++ b/fs/autofs/autofs_i.h @@ -71,6 +71,7 @@ struct autofs_info { kuid_t uid; kgid_t gid; + struct rcu_head rcu; }; #define AUTOFS_INF_EXPIRING (1<<0) /* dentry in the process of expiring */ diff --git a/fs/autofs/inode.c b/fs/autofs/inode.c index 80597b88718b..fb0225f21c12 100644 --- a/fs/autofs/inode.c +++ b/fs/autofs/inode.c @@ -36,7 +36,7 @@ void autofs_clean_ino(struct autofs_info *ino) void autofs_free_ino(struct autofs_info *ino) { - kfree(ino); + kfree_rcu(ino, rcu); } void autofs_kill_sb(struct super_block *sb) diff --git a/fs/dcache.c b/fs/dcache.c index aac41adf4743..c663c602f9ef 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -344,7 +344,7 @@ static void dentry_free(struct dentry *dentry) } } /* if dentry was never visible to RCU, immediate free is OK */ - if (!(dentry->d_flags & DCACHE_RCUACCESS)) + if (dentry->d_flags & DCACHE_NORCU) __d_free(&dentry->d_u.d_rcu); else call_rcu(&dentry->d_u.d_rcu, __d_free); @@ -1701,7 +1701,6 @@ struct dentry *d_alloc(struct dentry * parent, const struct qstr *name) struct dentry *dentry = __d_alloc(parent->d_sb, name); if (!dentry) return NULL; - dentry->d_flags |= DCACHE_RCUACCESS; spin_lock(&parent->d_lock); /* * don't need child lock because it is not subject @@ -1726,7 +1725,7 @@ struct dentry *d_alloc_cursor(struct dentry * parent) { struct dentry *dentry = d_alloc_anon(parent->d_sb); if (dentry) { - dentry->d_flags |= DCACHE_RCUACCESS | DCACHE_DENTRY_CURSOR; + dentry->d_flags |= DCACHE_DENTRY_CURSOR; dentry->d_parent = dget(parent); } return dentry; @@ -1739,10 +1738,17 @@ struct dentry *d_alloc_cursor(struct dentry * parent) * * For a filesystem that just pins its dentries in memory and never * performs lookups at all, return an unhashed IS_ROOT dentry. + * This is used for pipes, sockets et.al. - the stuff that should + * never be anyone's children or parents. Unlike all other + * dentries, these will not have RCU delay between dropping the + * last reference and freeing them. */ struct dentry *d_alloc_pseudo(struct super_block *sb, const struct qstr *name) { - return __d_alloc(sb, name); + struct dentry *dentry = __d_alloc(sb, name); + if (likely(dentry)) + dentry->d_flags |= DCACHE_NORCU; + return dentry; } EXPORT_SYMBOL(d_alloc_pseudo); @@ -1911,12 +1917,10 @@ struct dentry *d_make_root(struct inode *root_inode) if (root_inode) { res = d_alloc_anon(root_inode->i_sb); - if (res) { - res->d_flags |= DCACHE_RCUACCESS; + if (res) d_instantiate(res, root_inode); - } else { + else iput(root_inode); - } } return res; } @@ -2781,9 +2785,7 @@ static void __d_move(struct dentry *dentry, struct dentry *target, copy_name(dentry, target); target->d_hash.pprev = NULL; dentry->d_parent->d_lockref.count++; - if (dentry == old_parent) - dentry->d_flags |= DCACHE_RCUACCESS; - else + if (dentry != old_parent) /* wasn't IS_ROOT */ WARN_ON(!--old_parent->d_lockref.count); } else { target->d_parent = old_parent; diff --git a/fs/internal.h b/fs/internal.h index 6a8b71643af4..2e7362837a6e 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -89,9 +89,7 @@ extern int sb_prepare_remount_readonly(struct super_block *); extern void __init mnt_init(void); -extern int __mnt_want_write(struct vfsmount *); extern int __mnt_want_write_file(struct file *); -extern void __mnt_drop_write(struct vfsmount *); extern void __mnt_drop_write_file(struct file *); /* diff --git a/fs/nsfs.c b/fs/nsfs.c index 60702d677bd4..30d150a4f0c6 100644 --- a/fs/nsfs.c +++ b/fs/nsfs.c @@ -85,13 +85,12 @@ slow: inode->i_fop = &ns_file_operations; inode->i_private = ns; - dentry = d_alloc_pseudo(mnt->mnt_sb, &empty_name); + dentry = d_alloc_anon(mnt->mnt_sb); if (!dentry) { iput(inode); return ERR_PTR(-ENOMEM); } d_instantiate(dentry, inode); - dentry->d_flags |= DCACHE_RCUACCESS; dentry->d_fsdata = (void *)ns->ops; d = atomic_long_cmpxchg(&ns->stashed, 0, (unsigned long)dentry); if (d) { |