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stop passing nameidata * to ->d_revalidate()

Browse Source 
Just the lookup flags.  Die, bastard, die...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-06-10 16:03:43 -04:00
parent fa3c56bbda
commit 0b728e1911
25 changed files with 74 additions and 84 deletions
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2
Documentation/filesystems/Locking
View File

@ -9,7 +9,7 @@ be able to use diff(1).
--------------------------- dentry_operations --------------------------
prototypes:
int (*d_revalidate)(struct dentry *, struct nameidata *);
int (*d_revalidate)(struct dentry *, unsigned int);
int (*d_hash)(const struct dentry *, const struct inode *,
struct qstr *);
int (*d_compare)(const struct dentry *, const struct inode *,

5
Documentation/filesystems/porting
View File

@ -431,3 +431,8 @@ release it yourself.
d_alloc_root() is gone, along with a lot of bugs caused by code
misusing it. Replacement: d_make_root(inode). The difference is,
d_make_root() drops the reference to inode if dentry allocation fails.
--
[mandatory]
The witch is dead! Well, 1/3 of it, anyway. ->d_revalidate() does *not*
take struct nameidata anymore; just the flags.

8
Documentation/filesystems/vfs.txt
View File

@ -902,7 +902,7 @@ the VFS uses a default. As of kernel 2.6.22, the following members are
defined:
struct dentry_operations {
int (*d_revalidate)(struct dentry *, struct nameidata *);
int (*d_revalidate)(struct dentry *, unsigned int);
int (*d_hash)(const struct dentry *, const struct inode *,
struct qstr *);
int (*d_compare)(const struct dentry *, const struct inode *,
@ -921,11 +921,11 @@ struct dentry_operations {
dcache. Most filesystems leave this as NULL, because all their
dentries in the dcache are valid
d_revalidate may be called in rcu-walk mode (nd->flags & LOOKUP_RCU).
d_revalidate may be called in rcu-walk mode (flags & LOOKUP_RCU).
If in rcu-walk mode, the filesystem must revalidate the dentry without
blocking or storing to the dentry, d_parent and d_inode should not be
used without care (because they can go NULL), instead nd->inode should
be used.
used without care (because they can change and, in d_inode case, even
become NULL under us).
If a situation is encountered that rcu-walk cannot handle, return
-ECHILD and it will be called again in ref-walk mode.

4
fs/9p/vfs_dentry.c
View File

@ -100,13 +100,13 @@ static void v9fs_dentry_release(struct dentry *dentry)
}
}
static int v9fs_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
static int v9fs_lookup_revalidate(struct dentry *dentry, unsigned int flags)
{
struct p9_fid *fid;
struct inode *inode;
struct v9fs_inode *v9inode;
if (nd->flags & LOOKUP_RCU)
if (flags & LOOKUP_RCU)
return -ECHILD;
inode = dentry->d_inode;

6
fs/afs/dir.c
View File

@ -23,7 +23,7 @@ static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry,
struct nameidata *nd);
static int afs_dir_open(struct inode *inode, struct file *file);
static int afs_readdir(struct file *file, void *dirent, filldir_t filldir);
static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd);
static int afs_d_revalidate(struct dentry *dentry, unsigned int flags);
static int afs_d_delete(const struct dentry *dentry);
static void afs_d_release(struct dentry *dentry);
static int afs_lookup_filldir(void *_cookie, const char *name, int nlen,
@ -598,7 +598,7 @@ static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry,
* - NOTE! the hit can be a negative hit too, so we can't assume we have an
* inode
*/
static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd)
static int afs_d_revalidate(struct dentry *dentry, unsigned int flags)
{
struct afs_vnode *vnode, *dir;
struct afs_fid uninitialized_var(fid);
@ -607,7 +607,7 @@ static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd)
void *dir_version;
int ret;
if (nd->flags & LOOKUP_RCU)
if (flags & LOOKUP_RCU)
return -ECHILD;
vnode = AFS_FS_I(dentry->d_inode);

6
fs/ceph/dir.c
View File

@ -1042,12 +1042,12 @@ static int dir_lease_is_valid(struct inode *dir, struct dentry *dentry)
/*
* Check if cached dentry can be trusted.
*/
static int ceph_d_revalidate(struct dentry *dentry, struct nameidata *nd)
static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags)
{
int valid = 0;
struct inode *dir;
if (nd && nd->flags & LOOKUP_RCU)
if (flags & LOOKUP_RCU)
return -ECHILD;
dout("d_revalidate %p '%.*s' inode %p offset %lld\n", dentry,
@ -1094,7 +1094,7 @@ static void ceph_d_release(struct dentry *dentry)
}
static int ceph_snapdir_d_revalidate(struct dentry *dentry,
struct nameidata *nd)
unsigned int flags)
{
/*
* Eventually, we'll want to revalidate snapped metadata

8
fs/cifs/dir.c
View File

@ -700,9 +700,9 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
}
static int
cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd)
cifs_d_revalidate(struct dentry *direntry, unsigned int flags)
{
if (nd && (nd->flags & LOOKUP_RCU))
if (flags & LOOKUP_RCU)
return -ECHILD;
if (direntry->d_inode) {
@ -731,7 +731,7 @@ cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd)
* This may be nfsd (or something), anyway, we can't see the
* intent of this. So, since this can be for creation, drop it.
*/
if (!nd)
if (!flags)
return 0;
/*
@ -739,7 +739,7 @@ cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd)
* case sensitive name which is specified by user if this is
* for creation.
*/
if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
return 0;
if (time_after(jiffies, direntry->d_time + HZ) || !lookupCacheEnabled)

6
fs/coda/dir.c
View File

@ -46,7 +46,7 @@ static int coda_rename(struct inode *old_inode, struct dentry *old_dentry,
static int coda_readdir(struct file *file, void *buf, filldir_t filldir);
/* dentry ops */
static int coda_dentry_revalidate(struct dentry *de, struct nameidata *nd);
static int coda_dentry_revalidate(struct dentry *de, unsigned int flags);
static int coda_dentry_delete(const struct dentry *);
/* support routines */
@ -536,12 +536,12 @@ static int coda_venus_readdir(struct file *coda_file, void *buf,
}
/* called when a cache lookup succeeds */
static int coda_dentry_revalidate(struct dentry *de, struct nameidata *nd)
static int coda_dentry_revalidate(struct dentry *de, unsigned int flags)
{
struct inode *inode;
struct coda_inode_info *cii;
if (nd->flags & LOOKUP_RCU)
if (flags & LOOKUP_RCU)
return -ECHILD;
inode = de->d_inode;

20
fs/ecryptfs/dentry.c
View File

@ -32,7 +32,7 @@
/**
* ecryptfs_d_revalidate - revalidate an ecryptfs dentry
* @dentry: The ecryptfs dentry
* @nd: The associated nameidata
* @flags: lookup flags
*
* Called when the VFS needs to revalidate a dentry. This
* is called whenever a name lookup finds a dentry in the
@ -42,32 +42,20 @@
* Returns 1 if valid, 0 otherwise.
*
*/
static int ecryptfs_d_revalidate(struct dentry *dentry, struct nameidata *nd)
static int ecryptfs_d_revalidate(struct dentry *dentry, unsigned int flags)
{
struct dentry *lower_dentry;
struct vfsmount *lower_mnt;
struct dentry *dentry_save = NULL;
struct vfsmount *vfsmount_save = NULL;
int rc = 1;
if (nd && nd->flags & LOOKUP_RCU)
if (flags & LOOKUP_RCU)
return -ECHILD;
lower_dentry = ecryptfs_dentry_to_lower(dentry);
lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry);
if (!lower_dentry->d_op || !lower_dentry->d_op->d_revalidate)
goto out;
if (nd) {
dentry_save = nd->path.dentry;
vfsmount_save = nd->path.mnt;
nd->path.dentry = lower_dentry;
nd->path.mnt = lower_mnt;
}
rc = lower_dentry->d_op->d_revalidate(lower_dentry, nd);
if (nd) {
nd->path.dentry = dentry_save;
nd->path.mnt = vfsmount_save;
}
rc = lower_dentry->d_op->d_revalidate(lower_dentry, flags);
if (dentry->d_inode) {
struct inode *lower_inode =
ecryptfs_inode_to_lower(dentry->d_inode);

12
fs/fat/namei_vfat.c
View File

@ -41,9 +41,9 @@ static int vfat_revalidate_shortname(struct dentry *dentry)
return ret;
}
static int vfat_revalidate(struct dentry *dentry, struct nameidata *nd)
static int vfat_revalidate(struct dentry *dentry, unsigned int flags)
{
if (nd && nd->flags & LOOKUP_RCU)
if (flags & LOOKUP_RCU)
return -ECHILD;
/* This is not negative dentry. Always valid. */
@ -52,9 +52,9 @@ static int vfat_revalidate(struct dentry *dentry, struct nameidata *nd)
return vfat_revalidate_shortname(dentry);
}
static int vfat_revalidate_ci(struct dentry *dentry, struct nameidata *nd)
static int vfat_revalidate_ci(struct dentry *dentry, unsigned int flags)
{
if (nd && nd->flags & LOOKUP_RCU)
if (flags & LOOKUP_RCU)
return -ECHILD;
/*
@ -74,7 +74,7 @@ static int vfat_revalidate_ci(struct dentry *dentry, struct nameidata *nd)
* This may be nfsd (or something), anyway, we can't see the
* intent of this. So, since this can be for creation, drop it.
*/
if (!nd)
if (!flags)
return 0;
/*
@ -82,7 +82,7 @@ static int vfat_revalidate_ci(struct dentry *dentry, struct nameidata *nd)
* case sensitive name which is specified by user if this is
* for creation.
*/
if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
return 0;
return vfat_revalidate_shortname(dentry);

4
fs/fuse/dir.c
View File

@ -154,7 +154,7 @@ u64 fuse_get_attr_version(struct fuse_conn *fc)
* the lookup once more. If the lookup results in the same inode,
* then refresh the attributes, timeouts and mark the dentry valid.
*/
static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
static int fuse_dentry_revalidate(struct dentry *entry, unsigned int flags)
{
struct inode *inode;
@ -174,7 +174,7 @@ static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
if (!inode)
return 0;
if (nd && (nd->flags & LOOKUP_RCU))
if (flags & LOOKUP_RCU)
return -ECHILD;
fc = get_fuse_conn(inode);

6
fs/gfs2/dentry.c
View File

@ -25,7 +25,7 @@
/**
* gfs2_drevalidate - Check directory lookup consistency
* @dentry: the mapping to check
* @nd:
* @flags: lookup flags
*
* Check to make sure the lookup necessary to arrive at this inode from its
* parent is still good.
@ -33,7 +33,7 @@
* Returns: 1 if the dentry is ok, 0 if it isn't
*/
static int gfs2_drevalidate(struct dentry *dentry, struct nameidata *nd)
static int gfs2_drevalidate(struct dentry *dentry, unsigned int flags)
{
struct dentry *parent;
struct gfs2_sbd *sdp;
@ -44,7 +44,7 @@ static int gfs2_drevalidate(struct dentry *dentry, struct nameidata *nd)
int error;
int had_lock = 0;
if (nd && nd->flags & LOOKUP_RCU)
if (flags & LOOKUP_RCU)
return -ECHILD;
parent = dget_parent(dentry);

4
fs/hfs/sysdep.c
View File

@ -13,12 +13,12 @@
/* dentry case-handling: just lowercase everything */
static int hfs_revalidate_dentry(struct dentry *dentry, struct nameidata *nd)
static int hfs_revalidate_dentry(struct dentry *dentry, unsigned int flags)
{
struct inode *inode;
int diff;
if (nd->flags & LOOKUP_RCU)
if (flags & LOOKUP_RCU)
return -ECHILD;
inode = dentry->d_inode;

6
fs/jfs/namei.c
View File

@ -1570,7 +1570,7 @@ static int jfs_ci_compare(const struct dentry *parent,
return result;
}
static int jfs_ci_revalidate(struct dentry *dentry, struct nameidata *nd)
static int jfs_ci_revalidate(struct dentry *dentry, unsigned int flags)
{
/*
* This is not negative dentry. Always valid.
@ -1589,7 +1589,7 @@ static int jfs_ci_revalidate(struct dentry *dentry, struct nameidata *nd)
* This may be nfsd (or something), anyway, we can't see the
* intent of this. So, since this can be for creation, drop it.
*/
if (!nd)
if (!flags)
return 0;
/*
@ -1597,7 +1597,7 @@ static int jfs_ci_revalidate(struct dentry *dentry, struct nameidata *nd)
* case sensitive name which is specified by user if this is
* for creation.
*/
if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
return 0;
return 1;
}

2
fs/namei.c
View File

@ -465,7 +465,7 @@ static int unlazy_walk(struct nameidata *nd, struct dentry *dentry)
static inline int d_revalidate(struct dentry *dentry, struct nameidata *nd)
{
return dentry->d_op->d_revalidate(dentry, nd);
return dentry->d_op->d_revalidate(dentry, nd ? nd->flags : 0);
}
/**

6
fs/ncpfs/dir.c
View File

@ -72,7 +72,7 @@ const struct inode_operations ncp_dir_inode_operations =
/*
* Dentry operations routines
*/
static int ncp_lookup_validate(struct dentry *, struct nameidata *);
static int ncp_lookup_validate(struct dentry *, unsigned int);
static int ncp_hash_dentry(const struct dentry *, const struct inode *,
struct qstr *);
static int ncp_compare_dentry(const struct dentry *, const struct inode *,
@ -290,7 +290,7 @@ leave_me:;
static int
ncp_lookup_validate(struct dentry *dentry, struct nameidata *nd)
ncp_lookup_validate(struct dentry *dentry, unsigned int flags)
{
struct ncp_server *server;
struct dentry *parent;
@ -302,7 +302,7 @@ ncp_lookup_validate(struct dentry *dentry, struct nameidata *nd)
if (dentry == dentry->d_sb->s_root)
return 1;
if (nd->flags & LOOKUP_RCU)
if (flags & LOOKUP_RCU)
return -ECHILD;
parent = dget_parent(dentry);

10
fs/nfs/dir.c
View File

@ -1098,9 +1098,8 @@ int nfs_neg_need_reval(struct inode *dir, struct dentry *dentry,
* If the parent directory is seen to have changed, we throw out the
* cached dentry and do a new lookup.
*/
static int nfs_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
static int nfs_lookup_revalidate(struct dentry *dentry, unsigned int flags)
{
unsigned int flags = nd->flags;
struct inode *dir;
struct inode *inode;
struct dentry *parent;
@ -1339,7 +1338,7 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru
}
#ifdef CONFIG_NFS_V4
static int nfs4_lookup_revalidate(struct dentry *, struct nameidata *);
static int nfs4_lookup_revalidate(struct dentry *, unsigned int);
const struct dentry_operations nfs4_dentry_operations = {
.d_revalidate = nfs4_lookup_revalidate,
@ -1491,9 +1490,8 @@ static int nfs_atomic_open(struct inode *dir, struct dentry *dentry,
return finish_no_open(file, res);
}
static int nfs4_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
static int nfs4_lookup_revalidate(struct dentry *dentry, unsigned int flags)
{
unsigned int flags = nd->flags;
struct dentry *parent = NULL;
struct inode *inode;
struct inode *dir;
@ -1537,7 +1535,7 @@ static int nfs4_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
no_open_dput:
dput(parent);
no_open:
return nfs_lookup_revalidate(dentry, nd);
return nfs_lookup_revalidate(dentry, flags);
}
#endif /* CONFIG_NFSV4 */

5
fs/ocfs2/dcache.c
View File

@ -49,14 +49,13 @@ void ocfs2_dentry_attach_gen(struct dentry *dentry)
}
static int ocfs2_dentry_revalidate(struct dentry *dentry,
struct nameidata *nd)
static int ocfs2_dentry_revalidate(struct dentry *dentry, unsigned int flags)
{
struct inode *inode;
int ret = 0; /* if all else fails, just return false */
struct ocfs2_super *osb;
if (nd && nd->flags & LOOKUP_RCU)
if (flags & LOOKUP_RCU)
return -ECHILD;
inode = dentry->d_inode;

22
fs/proc/base.c
View File

@ -1601,13 +1601,13 @@ int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
* made this apply to all per process world readable and executable
* directories.
*/
int pid_revalidate(struct dentry *dentry, struct nameidata *nd)
int pid_revalidate(struct dentry *dentry, unsigned int flags)
{
struct inode *inode;
struct task_struct *task;
const struct cred *cred;
if (nd && nd->flags & LOOKUP_RCU)
if (flags & LOOKUP_RCU)
return -ECHILD;
inode = dentry->d_inode;
@ -1781,7 +1781,7 @@ static int proc_fd_link(struct dentry *dentry, struct path *path)
return proc_fd_info(dentry->d_inode, path, NULL);
}
static int tid_fd_revalidate(struct dentry *dentry, struct nameidata *nd)
static int tid_fd_revalidate(struct dentry *dentry, unsigned int flags)
{
struct inode *inode;
struct task_struct *task;
@ -1789,7 +1789,7 @@ static int tid_fd_revalidate(struct dentry *dentry, struct nameidata *nd)
struct files_struct *files;
const struct cred *cred;
if (nd && nd->flags & LOOKUP_RCU)
if (flags & LOOKUP_RCU)
return -ECHILD;
inode = dentry->d_inode;
@ -1868,7 +1868,7 @@ static struct dentry *proc_fd_instantiate(struct inode *dir,
d_set_d_op(dentry, &tid_fd_dentry_operations);
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
if (tid_fd_revalidate(dentry, NULL))
if (tid_fd_revalidate(dentry, 0))
error = NULL;
out:
@ -2003,7 +2003,7 @@ static int dname_to_vma_addr(struct dentry *dentry,
return 0;
}
static int map_files_d_revalidate(struct dentry *dentry, struct nameidata *nd)
static int map_files_d_revalidate(struct dentry *dentry, unsigned int flags)
{
unsigned long vm_start, vm_end;
bool exact_vma_exists = false;
@ -2013,7 +2013,7 @@ static int map_files_d_revalidate(struct dentry *dentry, struct nameidata *nd)
struct inode *inode;
int status = 0;
if (nd && nd->flags & LOOKUP_RCU)
if (flags & LOOKUP_RCU)
return -ECHILD;
if (!capable(CAP_SYS_ADMIN)) {
@ -2371,7 +2371,7 @@ static struct dentry *proc_fdinfo_instantiate(struct inode *dir,
d_set_d_op(dentry, &tid_fd_dentry_operations);
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
if (tid_fd_revalidate(dentry, NULL))
if (tid_fd_revalidate(dentry, 0))
error = NULL;
out:
@ -2430,7 +2430,7 @@ static struct dentry *proc_pident_instantiate(struct inode *dir,
d_set_d_op(dentry, &pid_dentry_operations);
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
if (pid_revalidate(dentry, NULL))
if (pid_revalidate(dentry, 0))
error = NULL;
out:
return error;
@ -3237,7 +3237,7 @@ static struct dentry *proc_pid_instantiate(struct inode *dir,
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
if (pid_revalidate(dentry, NULL))
if (pid_revalidate(dentry, 0))
error = NULL;
out:
return error;
@ -3508,7 +3508,7 @@ static struct dentry *proc_task_instantiate(struct inode *dir,
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
if (pid_revalidate(dentry, NULL))
if (pid_revalidate(dentry, 0))
error = NULL;
out:
return error;

2
fs/proc/internal.h
View File

@ -142,7 +142,7 @@ typedef struct dentry *instantiate_t(struct inode *, struct dentry *,
int proc_fill_cache(struct file *filp, void *dirent, filldir_t filldir,
const char *name, int len,
instantiate_t instantiate, struct task_struct *task, const void *ptr);
int pid_revalidate(struct dentry *dentry, struct nameidata *nd);
int pid_revalidate(struct dentry *dentry, unsigned int flags);
struct inode *proc_pid_make_inode(struct super_block * sb, struct task_struct *task);
extern const struct dentry_operations pid_dentry_operations;
int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat);

2
fs/proc/namespaces.c
View File

@ -56,7 +56,7 @@ static struct dentry *proc_ns_instantiate(struct inode *dir,
d_set_d_op(dentry, &pid_dentry_operations);
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
if (pid_revalidate(dentry, NULL))
if (pid_revalidate(dentry, 0))
error = NULL;
out:
return error;

4
fs/proc/proc_sysctl.c
View File

@ -794,9 +794,9 @@ static const struct inode_operations proc_sys_dir_operations = {
.getattr = proc_sys_getattr,
};
static int proc_sys_revalidate(struct dentry *dentry, struct nameidata *nd)
static int proc_sys_revalidate(struct dentry *dentry, unsigned int flags)
{
if (nd->flags & LOOKUP_RCU)
if (flags & LOOKUP_RCU)
return -ECHILD;
return !PROC_I(dentry->d_inode)->sysctl->unregistering;
}

2
fs/reiserfs/xattr.c
View File

@ -942,7 +942,7 @@ int reiserfs_permission(struct inode *inode, int mask)
return generic_permission(inode, mask);
}
static int xattr_hide_revalidate(struct dentry *dentry, struct nameidata *nd)
static int xattr_hide_revalidate(struct dentry *dentry, unsigned int flags)
{
return -EPERM;
}

4
fs/sysfs/dir.c
View File

@ -303,12 +303,12 @@ static int sysfs_dentry_delete(const struct dentry *dentry)
return !!(sd->s_flags & SYSFS_FLAG_REMOVED);
}
static int sysfs_dentry_revalidate(struct dentry *dentry, struct nameidata *nd)
static int sysfs_dentry_revalidate(struct dentry *dentry, unsigned int flags)
{
struct sysfs_dirent *sd;
int is_dir;
if (nd->flags & LOOKUP_RCU)
if (flags & LOOKUP_RCU)
return -ECHILD;
sd = dentry->d_fsdata;

2
include/linux/dcache.h
View File

@ -144,7 +144,7 @@ enum dentry_d_lock_class
};
struct dentry_operations {
int (*d_revalidate)(struct dentry *, struct nameidata *);
int (*d_revalidate)(struct dentry *, unsigned int);
int (*d_hash)(const struct dentry *, const struct inode *,
struct qstr *);
int (*d_compare)(const struct dentry *, const struct inode *,