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linux-sg2042
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kill struct opendata 

Just pass struct file *.  Methods are happier that way...
There's no need to return struct file * from finish_open() now,
so let it return int.  Next: saner prototypes for parts in
namei.c

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-06-22 12:40:19 +04:00
parent a4a3bdd778
commit 30d9049474
15 changed files with 81 additions and 98 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/filesystems/Locking
View File

@ -63,7 +63,7 @@ ata *);
int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start, u64 len);
void (*update_time)(struct inode *, struct timespec *, int);
int (*atomic_open)(struct inode *, struct dentry *,
struct opendata *, unsigned open_flag,
struct file *, unsigned open_flag,
umode_t create_mode, int *opened);
locking rules:

2
Documentation/filesystems/vfs.txt
View File

@ -365,7 +365,7 @@ struct inode_operations {
int (*removexattr) (struct dentry *, const char *);
void (*update_time)(struct inode *, struct timespec *, int);
int (*atomic_open)(struct inode *, struct dentry *,
struct opendata *, unsigned open_flag,
struct file *, unsigned open_flag,
umode_t create_mode, int *opened);
};

15
fs/9p/vfs_inode.c
View File

@ -858,12 +858,11 @@ error:
static int
v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
struct opendata *od, unsigned flags, umode_t mode,
struct file *file, unsigned flags, umode_t mode,
int *opened)
{
int err;
u32 perm;
struct file *filp;
struct v9fs_inode *v9inode;
struct v9fs_session_info *v9ses;
struct p9_fid *fid, *inode_fid;
@ -880,7 +879,7 @@ v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
/* Only creates */
if (!(flags & O_CREAT) || dentry->d_inode) {
finish_no_open(od, res);
finish_no_open(file, res);
return 1;
}
@ -918,16 +917,14 @@ v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
v9inode->writeback_fid = (void *) inode_fid;
}
mutex_unlock(&v9inode->v_mutex);
filp = finish_open(od, dentry, generic_file_open, opened);
if (IS_ERR(filp)) {
err = PTR_ERR(filp);
err = finish_open(file, dentry, generic_file_open, opened);
if (err)
goto error;
}
filp->private_data = fid;
file->private_data = fid;
#ifdef CONFIG_9P_FSCACHE
if (v9ses->cache)
v9fs_cache_inode_set_cookie(dentry->d_inode, filp);
v9fs_cache_inode_set_cookie(dentry->d_inode, file);
#endif
*opened |= FILE_CREATED;

15
fs/9p/vfs_inode_dotl.c
View File

@ -242,14 +242,13 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
static int
v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
struct opendata *od, unsigned flags, umode_t omode,
struct file *file, unsigned flags, umode_t omode,
int *opened)
{
int err = 0;
gid_t gid;
umode_t mode;
char *name = NULL;
struct file *filp;
struct p9_qid qid;
struct inode *inode;
struct p9_fid *fid = NULL;
@ -270,7 +269,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
/* Only creates */
if (!(flags & O_CREAT) || dentry->d_inode) {
finish_no_open(od, res);
finish_no_open(file, res);
return 1;
}
@ -357,15 +356,13 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
}
mutex_unlock(&v9inode->v_mutex);
/* Since we are opening a file, assign the open fid to the file */
filp = finish_open(od, dentry, generic_file_open, opened);
if (IS_ERR(filp)) {
err = PTR_ERR(filp);
err = finish_open(file, dentry, generic_file_open, opened);
if (err)
goto err_clunk_old_fid;
}
filp->private_data = ofid;
file->private_data = ofid;
#ifdef CONFIG_9P_FSCACHE
if (v9ses->cache)
v9fs_cache_inode_set_cookie(inode, filp);
v9fs_cache_inode_set_cookie(inode, file);
#endif
*opened |= FILE_CREATED;
out:

8
fs/ceph/dir.c
View File

@ -635,7 +635,7 @@ static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
}
int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
struct opendata *od, unsigned flags, umode_t mode,
struct file *file, unsigned flags, umode_t mode,
int *opened)
{
int err;
@ -649,7 +649,7 @@ int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
if (err < 0)
return err;
return ceph_lookup_open(dir, dentry, od, flags, mode, opened);
return ceph_lookup_open(dir, dentry, file, flags, mode, opened);
}
if (d_unhashed(dentry)) {
@ -663,12 +663,12 @@ int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
/* We don't deal with positive dentries here */
if (dentry->d_inode) {
finish_no_open(od, res);
finish_no_open(file, res);
return 1;
}
*opened |= FILE_CREATED;
err = ceph_lookup_open(dir, dentry, od, flags, mode, opened);
err = ceph_lookup_open(dir, dentry, file, flags, mode, opened);
dput(res);
return err;

7
fs/ceph/file.c
View File

@ -214,12 +214,11 @@ out:
* ceph_release gets called). So fear not!
*/
int ceph_lookup_open(struct inode *dir, struct dentry *dentry,
struct opendata *od, unsigned flags, umode_t mode,
struct file *file, unsigned flags, umode_t mode,
int *opened)
{
struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
struct ceph_mds_client *mdsc = fsc->mdsc;
struct file *file = NULL;
struct ceph_mds_request *req;
struct dentry *ret;
int err;
@ -248,9 +247,7 @@ int ceph_lookup_open(struct inode *dir, struct dentry *dentry,
err = ceph_handle_notrace_create(dir, dentry);
if (err)
goto out;
file = finish_open(od, req->r_dentry, ceph_open, opened);
if (IS_ERR(file))
err = PTR_ERR(file);
err = finish_open(file, req->r_dentry, ceph_open, opened);
out:
ret = ceph_finish_lookup(req, dentry, err);
ceph_mdsc_put_request(req);

2
fs/ceph/super.h
View File

@ -807,7 +807,7 @@ extern int ceph_copy_from_page_vector(struct page **pages,
extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags);
extern int ceph_open(struct inode *inode, struct file *file);
extern int ceph_lookup_open(struct inode *dir, struct dentry *dentry,
struct opendata *od, unsigned flags,
struct file *od, unsigned flags,
umode_t mode, int *opened);
extern int ceph_release(struct inode *inode, struct file *filp);

2
fs/cifs/cifsfs.h
View File

@ -47,7 +47,7 @@ extern struct inode *cifs_root_iget(struct super_block *);
extern int cifs_create(struct inode *, struct dentry *, umode_t,
struct nameidata *);
extern int cifs_atomic_open(struct inode *, struct dentry *,
struct opendata *, unsigned, umode_t,
struct file *, unsigned, umode_t,
int *);
extern struct dentry *cifs_lookup(struct inode *, struct dentry *,
struct nameidata *);

9
fs/cifs/dir.c
View File

@ -378,7 +378,7 @@ out:
int
cifs_atomic_open(struct inode *inode, struct dentry *direntry,
struct opendata *od, unsigned oflags, umode_t mode,
struct file *file, unsigned oflags, umode_t mode,
int *opened)
{
int rc;
@ -405,7 +405,7 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
if (IS_ERR(res))
return PTR_ERR(res);
finish_no_open(od, res);
finish_no_open(file, res);
return 1;
}
@ -431,9 +431,8 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
if (rc)
goto out;
filp = finish_open(od, direntry, generic_file_open, opened);
if (IS_ERR(filp)) {
rc = PTR_ERR(filp);
rc = finish_open(file, direntry, generic_file_open, opened);
if (rc) {
CIFSSMBClose(xid, tcon, fileHandle);
goto out;
}

15
fs/fuse/dir.c
View File

@ -370,7 +370,7 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
* 'mknod' + 'open' requests.
*/
static int fuse_create_open(struct inode *dir, struct dentry *entry,
struct opendata *od, unsigned flags,
struct file *file, unsigned flags,
umode_t mode, int *opened)
{
int err;
@ -382,7 +382,6 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry,
struct fuse_open_out outopen;
struct fuse_entry_out outentry;
struct fuse_file *ff;
struct file *file;
forget = fuse_alloc_forget();
err = -ENOMEM;
@ -450,14 +449,12 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry,
d_instantiate(entry, inode);
fuse_change_entry_timeout(entry, &outentry);
fuse_invalidate_attr(dir);
file = finish_open(od, entry, generic_file_open, opened);
if (IS_ERR(file)) {
err = PTR_ERR(file);
err = finish_open(file, entry, generic_file_open, opened);
if (err) {
fuse_sync_release(ff, flags);
} else {
file->private_data = fuse_file_get(ff);
fuse_finish_open(inode, file);
err = 0;
}
return err;
@ -473,7 +470,7 @@ out_err:
static int fuse_mknod(struct inode *, struct dentry *, umode_t, dev_t);
static int fuse_atomic_open(struct inode *dir, struct dentry *entry,
struct opendata *od, unsigned flags,
struct file *file, unsigned flags,
umode_t mode, int *opened)
{
int err;
@ -498,7 +495,7 @@ static int fuse_atomic_open(struct inode *dir, struct dentry *entry,
if (fc->no_create)
goto mknod;
err = fuse_create_open(dir, entry, od, flags, mode, opened);
err = fuse_create_open(dir, entry, file, flags, mode, opened);
if (err == -ENOSYS) {
fc->no_create = 1;
goto mknod;
@ -512,7 +509,7 @@ mknod:
if (err)
goto out_dput;
no_open:
finish_no_open(od, res);
finish_no_open(file, res);
return 1;
}

3
fs/internal.h
View File

@ -82,9 +82,6 @@ extern struct super_block *user_get_super(dev_t);
/*
* open.c
*/
struct opendata {
struct file *filp;
};
struct open_flags {
int open_flag;
umode_t mode;

48
fs/namei.c
View File

@ -2194,7 +2194,7 @@ static int may_o_create(struct path *dir, struct dentry *dentry, umode_t mode)
}
static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
struct path *path, struct opendata *od,
struct path *path, struct file *file,
const struct open_flags *op,
bool *want_write, bool need_lookup,
int *opened)
@ -2269,9 +2269,9 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
if (nd->flags & LOOKUP_DIRECTORY)
open_flag |= O_DIRECTORY;
od->filp->f_path.dentry = DENTRY_NOT_SET;
od->filp->f_path.mnt = nd->path.mnt;
error = dir->i_op->atomic_open(dir, dentry, od, open_flag, mode,
file->f_path.dentry = DENTRY_NOT_SET;
file->f_path.mnt = nd->path.mnt;
error = dir->i_op->atomic_open(dir, dentry, file, open_flag, mode,
opened);
if (error < 0) {
if (create_error && error == -ENOENT)
@ -2287,13 +2287,13 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
}
if (error) { /* returned 1, that is */
if (WARN_ON(od->filp->f_path.dentry == DENTRY_NOT_SET)) {
if (WARN_ON(file->f_path.dentry == DENTRY_NOT_SET)) {
filp = ERR_PTR(-EIO);
goto out;
}
if (od->filp->f_path.dentry) {
if (file->f_path.dentry) {
dput(dentry);
dentry = od->filp->f_path.dentry;
dentry = file->f_path.dentry;
}
goto looked_up;
}
@ -2302,7 +2302,7 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
* We didn't have the inode before the open, so check open permission
* here.
*/
filp = od->filp;
filp = file;
error = may_open(&filp->f_path, acc_mode, open_flag);
if (error) {
fput(filp);
@ -2350,7 +2350,7 @@ looked_up:
* was performed, only lookup.
*/
static struct file *lookup_open(struct nameidata *nd, struct path *path,
struct opendata *od,
struct file *file,
const struct open_flags *op,
bool *want_write, int *opened)
{
@ -2370,7 +2370,7 @@ static struct file *lookup_open(struct nameidata *nd, struct path *path,
goto out_no_open;
if ((nd->flags & LOOKUP_OPEN) && dir_inode->i_op->atomic_open) {
return atomic_open(nd, dentry, path, od, op, want_write,
return atomic_open(nd, dentry, path, file, op, want_write,
need_lookup, opened);
}
@ -2420,7 +2420,7 @@ out_dput:
* Handle the last step of open()
*/
static struct file *do_last(struct nameidata *nd, struct path *path,
struct opendata *od, const struct open_flags *op,
struct file *file, const struct open_flags *op,
int *opened, const char *pathname)
{
struct dentry *dir = nd->path.dentry;
@ -2497,7 +2497,7 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
retry_lookup:
mutex_lock(&dir->d_inode->i_mutex);
filp = lookup_open(nd, path, od, op, &want_write, opened);
filp = lookup_open(nd, path, file, op, &want_write, opened);
mutex_unlock(&dir->d_inode->i_mutex);
if (filp) {
@ -2604,13 +2604,15 @@ finish_open_created:
error = may_open(&nd->path, acc_mode, open_flag);
if (error)
goto exit;
od->filp->f_path.mnt = nd->path.mnt;
filp = finish_open(od, nd->path.dentry, NULL, opened);
if (IS_ERR(filp)) {
if (filp == ERR_PTR(-EOPENSTALE))
file->f_path.mnt = nd->path.mnt;
error = finish_open(file, nd->path.dentry, NULL, opened);
if (error) {
filp = ERR_PTR(error);
if (error == -EOPENSTALE)
goto stale_open;
goto out;
}
filp = file;
opened:
error = open_check_o_direct(filp);
if (error)
@ -2663,17 +2665,17 @@ static struct file *path_openat(int dfd, const char *pathname,
struct nameidata *nd, const struct open_flags *op, int flags)
{
struct file *base = NULL;
struct opendata od;
struct file *file;
struct file *res;
struct path path;
int opened = 0;
int error;
od.filp = get_empty_filp();
if (!od.filp)
file = get_empty_filp();
if (!file)
return ERR_PTR(-ENFILE);
od.filp->f_flags = op->open_flag;
file->f_flags = op->open_flag;
error = path_init(dfd, pathname, flags | LOOKUP_PARENT, nd, &base);
if (unlikely(error))
@ -2684,7 +2686,7 @@ static struct file *path_openat(int dfd, const char *pathname,
if (unlikely(error))
goto out_filp;
res = do_last(nd, &path, &od, op, &opened, pathname);
res = do_last(nd, &path, file, op, &opened, pathname);
while (unlikely(!res)) { /* trailing symlink */
struct path link = path;
void *cookie;
@ -2699,7 +2701,7 @@ static struct file *path_openat(int dfd, const char *pathname,
error = follow_link(&link, nd, &cookie);
if (unlikely(error))
goto out_filp;
res = do_last(nd, &path, &od, op, &opened, pathname);
res = do_last(nd, &path, file, op, &opened, pathname);
put_link(nd, &link, cookie);
}
out:
@ -2708,7 +2710,7 @@ out:
if (base)
fput(base);
if (!(opened & FILE_OPENED))
put_filp(od.filp);
put_filp(file);
if (res == ERR_PTR(-EOPENSTALE)) {
if (flags & LOOKUP_RCU)
res = ERR_PTR(-ECHILD);

20
fs/nfs/dir.c
View File

@ -112,7 +112,7 @@ const struct inode_operations nfs3_dir_inode_operations = {
#ifdef CONFIG_NFS_V4
static int nfs_atomic_open(struct inode *, struct dentry *,
struct opendata *, unsigned, umode_t,
struct file *, unsigned, umode_t,
int *);
const struct inode_operations nfs4_dir_inode_operations = {
.create = nfs_create,
@ -1389,10 +1389,9 @@ static int do_open(struct inode *inode, struct file *filp)
static int nfs_finish_open(struct nfs_open_context *ctx,
struct dentry *dentry,
struct opendata *od, unsigned open_flags,
struct file *file, unsigned open_flags,
int *opened)
{
struct file *filp;
int err;
if (ctx->dentry != dentry) {
@ -1407,13 +1406,10 @@ static int nfs_finish_open(struct nfs_open_context *ctx,
goto out;
}
filp = finish_open(od, dentry, do_open, opened);
if (IS_ERR(filp)) {
err = PTR_ERR(filp);
err = finish_open(file, dentry, do_open, opened);
if (err)
goto out;
}
nfs_file_set_open_context(filp, ctx);
err = 0;
nfs_file_set_open_context(file, ctx);
out:
put_nfs_open_context(ctx);
@ -1421,7 +1417,7 @@ out:
}
static int nfs_atomic_open(struct inode *dir, struct dentry *dentry,
struct opendata *od, unsigned open_flags,
struct file *file, unsigned open_flags,
umode_t mode, int *opened)
{
struct nfs_open_context *ctx;
@ -1497,7 +1493,7 @@ static int nfs_atomic_open(struct inode *dir, struct dentry *dentry,
nfs_unblock_sillyrename(dentry->d_parent);
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
err = nfs_finish_open(ctx, dentry, od, open_flags, opened);
err = nfs_finish_open(ctx, dentry, file, open_flags, opened);
dput(res);
out:
@ -1509,7 +1505,7 @@ no_open:
if (IS_ERR(res))
goto out;
finish_no_open(od, res);
finish_no_open(file, res);
return 1;
}

20
fs/open.c
View File

@ -781,21 +781,23 @@ static struct file *__dentry_open(struct dentry *dentry, struct vfsmount *mnt,
* If the open callback is set to NULL, then the standard f_op->open()
* filesystem callback is substituted.
*/
struct file *finish_open(struct opendata *od, struct dentry *dentry,
int (*open)(struct inode *, struct file *),
int *opened)
int finish_open(struct file *file, struct dentry *dentry,
int (*open)(struct inode *, struct file *),
int *opened)
{
struct file *res;
BUG_ON(*opened & FILE_OPENED); /* once it's opened, it's opened */
mntget(od->filp->f_path.mnt);
mntget(file->f_path.mnt);
dget(dentry);
res = do_dentry_open(dentry, od->filp->f_path.mnt, od->filp, open, current_cred());
if (!IS_ERR(res))
res = do_dentry_open(dentry, file->f_path.mnt, file, open, current_cred());
if (!IS_ERR(res)) {
*opened |= FILE_OPENED;
return 0;
}
return res;
return PTR_ERR(res);
}
EXPORT_SYMBOL(finish_open);
@ -808,9 +810,9 @@ EXPORT_SYMBOL(finish_open);
* This can be used to set the result of a successful lookup in ->atomic_open().
* The filesystem's atomic_open() method shall return NULL after calling this.
*/
void finish_no_open(struct opendata *od, struct dentry *dentry)
void finish_no_open(struct file *file, struct dentry *dentry)
{
od->filp->f_path.dentry = dentry;
file->f_path.dentry = dentry;
}
EXPORT_SYMBOL(finish_no_open);

11
include/linux/fs.h
View File

@ -427,7 +427,6 @@ struct kstatfs;
struct vm_area_struct;
struct vfsmount;
struct cred;
struct opendata;
extern void __init inode_init(void);
extern void __init inode_init_early(void);
@ -1695,7 +1694,7 @@ struct inode_operations {
u64 len);
int (*update_time)(struct inode *, struct timespec *, int);
int (*atomic_open)(struct inode *, struct dentry *,
struct opendata *, unsigned open_flag,
struct file *, unsigned open_flag,
umode_t create_mode, int *opened);
} ____cacheline_aligned;
@ -2069,10 +2068,10 @@ enum {
FILE_CREATED = 1,
FILE_OPENED = 2
};
extern struct file *finish_open(struct opendata *od, struct dentry *dentry,
int (*open)(struct inode *, struct file *),
int *opened);
extern void finish_no_open(struct opendata *od, struct dentry *dentry);
extern int finish_open(struct file *file, struct dentry *dentry,
int (*open)(struct inode *, struct file *),
int *opened);
extern void finish_no_open(struct file *file, struct dentry *dentry);
/* fs/ioctl.c */