litmus-rt.git - The LITMUS^RT kernel.

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author	Linus Torvalds <torvalds@linux-foundation.org>	2010-01-06 23:26:42 -0500
committer	Linus Torvalds <torvalds@linux-foundation.org>	2010-01-06 23:26:42 -0500
commit	2c1f1895ef2aa8f0e5497893eff71304aef332e1 (patch)
tree	c7e17f739b121f5db12608117b757065e08a23f0 /include/linux/libata.h
parent	635b3c9d5508d1dfe02ee5f882becea37e294111 (diff)
parent	a81406b4143ff07e586bbe03c50f089da94eefe1 (diff)

Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6

* 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: drm/radeon/kms: rs600: use correct mask for SW interrupt gpu/drm/radeon/radeon_irq.c: move a dereference below a NULL test drm/radeon/radeon_device.c: move a dereference below a NULL test drm/radeon/radeon_fence.c: move a dereference below the NULL test drm/radeon/radeon_connectors.c: add a NULL test before dereference drm/radeon/kms: fix memory leak drm/kms: Fix &&/|| confusion in drm_fb_helper_connector_parse_command_line() drm/edid: Fix CVT width/height decode drm/edid: Skip empty CVT codepoints drm: remove address mask param for drm_pci_alloc() drm/radeon/kms: add missing breaks in i2c and ss lookups drm/radeon/kms: add primary dac adj values table drm/radeon/kms: fallback to default connector table

Diffstat (limited to 'include/linux/libata.h')

0 files changed, 0 insertions, 0 deletions

#include <linux/mount.h> #include <linux/file.h> #include <linux/fs.h> #include <linux/proc_ns.h> #include <linux/magic.h> #include <linux/ktime.h> #include <linux/seq_file.h> #include <linux/user_namespace.h> #include <linux/nsfs.h> static struct vfsmount *nsfs_mnt; static long ns_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg); static const struct file_operations ns_file_operations = { .llseek = no_llseek, .unlocked_ioctl = ns_ioctl, }; static char *ns_dname(struct dentry *dentry, char *buffer, int buflen) { struct inode *inode = d_inode(dentry); const struct proc_ns_operations *ns_ops = dentry->d_fsdata; return dynamic_dname(dentry, buffer, buflen, "%s:[%lu]", ns_ops->name, inode->i_ino); } static void ns_prune_dentry(struct dentry *dentry) { struct inode *inode = d_inode(dentry); if (inode) { struct ns_common *ns = inode->i_private; atomic_long_set(&ns->stashed, 0); } } const struct dentry_operations ns_dentry_operations = { .d_prune = ns_prune_dentry, .d_delete = always_delete_dentry, .d_dname = ns_dname, }; static void nsfs_evict(struct inode *inode) { struct ns_common *ns = inode->i_private; clear_inode(inode); ns->ops->put(ns); } static void *__ns_get_path(struct path *path, struct ns_common *ns) { struct vfsmount *mnt = nsfs_mnt; struct qstr qname = { .name = "", }; struct dentry *dentry; struct inode *inode; unsigned long d; rcu_read_lock(); d = atomic_long_read(&ns->stashed); if (!d) goto slow; dentry = (struct dentry *)d; if (!lockref_get_not_dead(&dentry->d_lockref)) goto slow; rcu_read_unlock(); ns->ops->put(ns); got_it: path->mnt = mntget(mnt); path->dentry = dentry; return NULL; slow: rcu_read_unlock(); inode = new_inode_pseudo(mnt->mnt_sb); if (!inode) { ns->ops->put(ns); return ERR_PTR(-ENOMEM); } inode->i_ino = ns->inum; inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); inode->i_flags |= S_IMMUTABLE; inode->i_mode = S_IFREG | S_IRUGO; inode->i_fop = &ns_file_operations; inode->i_private = ns; dentry = d_alloc_pseudo(mnt->mnt_sb, &qname); if (!dentry) { iput(inode); return ERR_PTR(-ENOMEM); } d_instantiate(dentry, inode); dentry->d_fsdata = (void *)ns->ops; d = atomic_long_cmpxchg(&ns->stashed, 0, (unsigned long)dentry); if (d) { d_delete(dentry); /* make sure ->d_prune() does nothing */ dput(dentry); cpu_relax(); return ERR_PTR(-EAGAIN); } goto got_it; } void *ns_get_path(struct path *path, struct task_struct *task, const struct proc_ns_operations *ns_ops) { struct ns_common *ns; void *ret; again: ns = ns_ops->get(task); if (!ns) return ERR_PTR(-ENOENT); ret = __ns_get_path(path, ns); if (IS_ERR(ret) && PTR_ERR(ret) == -EAGAIN) goto again; return ret; } int open_related_ns(struct ns_common *ns, struct ns_common *(*get_ns)(struct ns_common *ns)) { struct path path = {}; struct file *f; void *err; int fd; fd = get_unused_fd_flags(O_CLOEXEC); if (fd < 0) return fd; while (1) { struct ns_common *relative; relative = get_ns(ns); if (IS_ERR(relative)) { put_unused_fd(fd); return PTR_ERR(relative); } err = __ns_get_path(&path, relative); if (IS_ERR(err) && PTR_ERR(err) == -EAGAIN) continue; break; } if (IS_ERR(err)) { put_unused_fd(fd); return PTR_ERR(err); } f = dentry_open(&path, O_RDONLY, current_cred()); path_put(&path); if (IS_ERR(f)) { put_unused_fd(fd); fd = PTR_ERR(f); } else fd_install(fd, f); return fd; } static long ns_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) { struct ns_common *ns = get_proc_ns(file_inode(filp)); switch (ioctl) { case NS_GET_USERNS: return open_related_ns(ns, ns_get_owner); case NS_GET_PARENT: if (!ns->ops->get_parent) return -EINVAL; return open_related_ns(ns, ns->ops->get_parent); default: return -ENOTTY; } } int ns_get_name(char *buf, size_t size, struct task_struct *task, const struct proc_ns_operations *ns_ops) { struct ns_common *ns; int res = -ENOENT; ns = ns_ops->get(task); if (ns) {


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