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Merge branch 'work.open3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Browse Source 
Pull vfs open-related updates from Al Viro:

 - "do we need fput() or put_filp()" rules are gone - it's always fput()
   now. We keep track of that state where it belongs - in ->f_mode.

 - int *opened mess killed - in finish_open(), in ->atomic_open()
   instances and in fs/namei.c code around do_last()/lookup_open()/atomic_open().

 - alloc_file() wrappers with saner calling conventions are introduced
   (alloc_file_clone() and alloc_file_pseudo()); callers converted, with
   much simplification.

 - while we are at it, saner calling conventions for path_init() and
   link_path_walk(), simplifying things inside fs/namei.c (both on
   open-related paths and elsewhere).

* 'work.open3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (40 commits)
  few more cleanups of link_path_walk() callers
  allow link_path_walk() to take ERR_PTR()
  make path_init() unconditionally paired with terminate_walk()
  document alloc_file() changes
  make alloc_file() static
  do_shmat(): grab shp->shm_file earlier, switch to alloc_file_clone()
  new helper: alloc_file_clone()
  create_pipe_files(): switch the first allocation to alloc_file_pseudo()
  anon_inode_getfile(): switch to alloc_file_pseudo()
  hugetlb_file_setup(): switch to alloc_file_pseudo()
  ocxlflash_getfile(): switch to alloc_file_pseudo()
  cxl_getfile(): switch to alloc_file_pseudo()
  ... and switch shmem_file_setup() to alloc_file_pseudo()
  __shmem_file_setup(): reorder allocations
  new wrapper: alloc_file_pseudo()
  kill FILE_{CREATED,OPENED}
  switch atomic_open() and lookup_open() to returning 0 in all success cases
  document ->atomic_open() changes
  ->atomic_open(): return 0 in all success cases
  get rid of 'opened' in path_openat() and the helpers downstream
  ...
This commit is contained in:
Linus Torvalds 2018-08-13 19:58:36 -07:00
commit a66b4cd1e7
45 changed files with 382 additions and 587 deletions
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2
Documentation/filesystems/Locking
View File

@ -64,7 +64,7 @@ prototypes:
void (*update_time)(struct inode *, struct timespec *, int);
int (*atomic_open)(struct inode *, struct dentry *,
struct file *, unsigned open_flag,
umode_t create_mode, int *opened);
umode_t create_mode);
int (*tmpfile) (struct inode *, struct dentry *, umode_t);
locking rules:

20
Documentation/filesystems/porting
View File

@ -602,3 +602,23 @@ in your dentry operations instead.
dentry separately, and it now has request_mask and query_flags arguments
to specify the fields and sync type requested by statx. Filesystems not
supporting any statx-specific features may ignore the new arguments.
--
[mandatory]
->atomic_open() calling conventions have changed. Gone is int *opened,
along with FILE_OPENED/FILE_CREATED. In place of those we have
FMODE_OPENED/FMODE_CREATED, set in file->f_mode. Additionally, return
value for 'called finish_no_open(), open it yourself' case has become
0, not 1. Since finish_no_open() itself is returning 0 now, that part
does not need any changes in ->atomic_open() instances.
--
[mandatory]
alloc_file() has become static now; two wrappers are to be used instead.
alloc_file_pseudo(inode, vfsmount, name, flags, ops) is for the cases
when dentry needs to be created; that's the majority of old alloc_file()
users. Calling conventions: on success a reference to new struct file
is returned and callers reference to inode is subsumed by that. On
failure, ERR_PTR() is returned and no caller's references are affected,
so the caller needs to drop the inode reference it held.
alloc_file_clone(file, flags, ops) does not affect any caller's references.
On success you get a new struct file sharing the mount/dentry with the
original, on failure - ERR_PTR().

18
Documentation/filesystems/vfs.txt
View File

@ -386,7 +386,7 @@ struct inode_operations {
ssize_t (*listxattr) (struct dentry *, char *, size_t);
void (*update_time)(struct inode *, struct timespec *, int);
int (*atomic_open)(struct inode *, struct dentry *, struct file *,
unsigned open_flag, umode_t create_mode, int *opened);
unsigned open_flag, umode_t create_mode);
int (*tmpfile) (struct inode *, struct dentry *, umode_t);
};
@ -496,13 +496,15 @@ otherwise noted.
atomic_open: called on the last component of an open. Using this optional
method the filesystem can look up, possibly create and open the file in
one atomic operation. If it cannot perform this (e.g. the file type
turned out to be wrong) it may signal this by returning 1 instead of
usual 0 or -ve . This method is only called if the last component is
negative or needs lookup. Cached positive dentries are still handled by
f_op->open(). If the file was created, the FILE_CREATED flag should be
set in "opened". In case of O_EXCL the method must only succeed if the
file didn't exist and hence FILE_CREATED shall always be set on success.
one atomic operation. If it wants to leave actual opening to the
caller (e.g. if the file turned out to be a symlink, device, or just
something filesystem won't do atomic open for), it may signal this by
returning finish_no_open(file, dentry). This method is only called if
the last component is negative or needs lookup. Cached positive dentries
are still handled by f_op->open(). If the file was created,
FMODE_CREATED flag should be set in file->f_mode. In case of O_EXCL
the method must only succeed if the file didn't exist and hence FMODE_CREATED
shall always be set on success.
tmpfile: called in the end of O_TMPFILE open(). Optional, equivalent to
atomically creating, opening and unlinking a file in given directory.

2
drivers/gpu/drm/drm_lease.c
View File

@ -553,7 +553,7 @@ int drm_mode_create_lease_ioctl(struct drm_device *dev,
/* Clone the lessor file to create a new file for us */
DRM_DEBUG_LEASE("Allocating lease file\n");
lessee_file = filp_clone_open(lessor_file);
lessee_file = file_clone_open(lessor_file);
if (IS_ERR(lessee_file)) {
ret = PTR_ERR(lessee_file);
goto out_lessee;

22
drivers/misc/cxl/api.c
View File

@ -67,10 +67,8 @@ static struct file *cxl_getfile(const char *name,
const struct file_operations *fops,
void *priv, int flags)
{
struct qstr this;
struct path path;
struct file *file;
struct inode *inode = NULL;
struct inode *inode;
int rc;
/* strongly inspired by anon_inode_getfile() */
@ -91,23 +89,11 @@ static struct file *cxl_getfile(const char *name,
goto err_fs;
}
file = ERR_PTR(-ENOMEM);
this.name = name;
this.len = strlen(name);
this.hash = 0;
path.dentry = d_alloc_pseudo(cxl_vfs_mount->mnt_sb, &this);
if (!path.dentry)
file = alloc_file_pseudo(inode, cxl_vfs_mount, name,
flags & (O_ACCMODE | O_NONBLOCK), fops);
if (IS_ERR(file))
goto err_inode;
path.mnt = mntget(cxl_vfs_mount);
d_instantiate(path.dentry, inode);
file = alloc_file(&path, OPEN_FMODE(flags), fops);
if (IS_ERR(file)) {
path_put(&path);
goto err_fs;
}
file->f_flags = flags & (O_ACCMODE | O_NONBLOCK);
file->private_data = priv;
return file;

24
drivers/scsi/cxlflash/ocxl_hw.c
View File

@ -88,10 +88,8 @@ static struct file *ocxlflash_getfile(struct device *dev, const char *name,
const struct file_operations *fops,
void *priv, int flags)
{
struct qstr this;
struct path path;
struct file *file;
struct inode *inode = NULL;
struct inode *inode;
int rc;
if (fops->owner && !try_module_get(fops->owner)) {
@ -116,29 +114,15 @@ static struct file *ocxlflash_getfile(struct device *dev, const char *name,
goto err3;
}
this.name = name;
this.len = strlen(name);
this.hash = 0;
path.dentry = d_alloc_pseudo(ocxlflash_vfs_mount->mnt_sb, &this);
if (!path.dentry) {
dev_err(dev, "%s: d_alloc_pseudo failed\n", __func__);
rc = -ENOMEM;
goto err4;
}
path.mnt = mntget(ocxlflash_vfs_mount);
d_instantiate(path.dentry, inode);
file = alloc_file(&path, OPEN_FMODE(flags), fops);
file = alloc_file_pseudo(inode, ocxlflash_vfs_mount, name,
flags & (O_ACCMODE | O_NONBLOCK), fops);
if (IS_ERR(file)) {
rc = PTR_ERR(file);
dev_err(dev, "%s: alloc_file failed rc=%d\n",
__func__, rc);
path_put(&path);
goto err3;
goto err4;
}
file->f_flags = flags & (O_ACCMODE | O_NONBLOCK);
file->private_data = priv;
out:
return file;

7
fs/9p/vfs_inode.c
View File

@ -859,8 +859,7 @@ struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
static int
v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
struct file *file, unsigned flags, umode_t mode,
int *opened)
struct file *file, unsigned flags, umode_t mode)
{
int err;
u32 perm;
@ -917,7 +916,7 @@ v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
v9inode->writeback_fid = (void *) inode_fid;
}
mutex_unlock(&v9inode->v_mutex);
err = finish_open(file, dentry, generic_file_open, opened);
err = finish_open(file, dentry, generic_file_open);
if (err)
goto error;
@ -925,7 +924,7 @@ v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
v9fs_cache_inode_set_cookie(d_inode(dentry), file);
*opened |= FILE_CREATED;
file->f_mode |= FMODE_CREATED;
out:
dput(res);
return err;

7
fs/9p/vfs_inode_dotl.c
View File

@ -241,8 +241,7 @@ 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 file *file, unsigned flags, umode_t omode,
int *opened)
struct file *file, unsigned flags, umode_t omode)
{
int err = 0;
kgid_t gid;
@ -352,13 +351,13 @@ 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 */
err = finish_open(file, dentry, generic_file_open, opened);
err = finish_open(file, dentry, generic_file_open);
if (err)
goto err_clunk_old_fid;
file->private_data = ofid;
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
v9fs_cache_inode_set_cookie(inode, file);
*opened |= FILE_CREATED;
file->f_mode |= FMODE_CREATED;
out:
v9fs_put_acl(dacl, pacl);
dput(res);

24
fs/aio.c
View File

@ -202,9 +202,7 @@ static const struct address_space_operations aio_ctx_aops;
static struct file *aio_private_file(struct kioctx *ctx, loff_t nr_pages)
{
struct qstr this = QSTR_INIT("[aio]", 5);
struct file *file;
struct path path;
struct inode *inode = alloc_anon_inode(aio_mnt->mnt_sb);
if (IS_ERR(inode))
return ERR_CAST(inode);
@ -213,31 +211,17 @@ static struct file *aio_private_file(struct kioctx *ctx, loff_t nr_pages)
inode->i_mapping->private_data = ctx;
inode->i_size = PAGE_SIZE * nr_pages;
path.dentry = d_alloc_pseudo(aio_mnt->mnt_sb, &this);
if (!path.dentry) {
file = alloc_file_pseudo(inode, aio_mnt, "[aio]",
O_RDWR, &aio_ring_fops);
if (IS_ERR(file))
iput(inode);
return ERR_PTR(-ENOMEM);
}
path.mnt = mntget(aio_mnt);
d_instantiate(path.dentry, inode);
file = alloc_file(&path, FMODE_READ | FMODE_WRITE, &aio_ring_fops);
if (IS_ERR(file)) {
path_put(&path);
return file;
}
file->f_flags = O_RDWR;
return file;
}
static struct dentry *aio_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data)
{
static const struct dentry_operations ops = {
.d_dname = simple_dname,
};
struct dentry *root = mount_pseudo(fs_type, "aio:", NULL, &ops,
struct dentry *root = mount_pseudo(fs_type, "aio:", NULL, NULL,
AIO_RING_MAGIC);
if (!IS_ERR(root))

30
fs/anon_inodes.c
View File

@ -71,8 +71,6 @@ struct file *anon_inode_getfile(const char *name,
const struct file_operations *fops,
void *priv, int flags)
{
struct qstr this;
struct path path;
struct file *file;
if (IS_ERR(anon_inode_inode))
@ -81,40 +79,24 @@ struct file *anon_inode_getfile(const char *name,
if (fops->owner && !try_module_get(fops->owner))
return ERR_PTR(-ENOENT);
/*
* Link the inode to a directory entry by creating a unique name
* using the inode sequence number.
*/
file = ERR_PTR(-ENOMEM);
this.name = name;
this.len = strlen(name);
this.hash = 0;
path.dentry = d_alloc_pseudo(anon_inode_mnt->mnt_sb, &this);
if (!path.dentry)
goto err_module;
path.mnt = mntget(anon_inode_mnt);
/*
* We know the anon_inode inode count is always greater than zero,
* so ihold() is safe.
*/
ihold(anon_inode_inode);
d_instantiate(path.dentry, anon_inode_inode);
file = alloc_file(&path, OPEN_FMODE(flags), fops);
file = alloc_file_pseudo(anon_inode_inode, anon_inode_mnt, name,
flags & (O_ACCMODE | O_NONBLOCK), fops);
if (IS_ERR(file))
goto err_dput;
goto err;
file->f_mapping = anon_inode_inode->i_mapping;
file->f_flags = flags & (O_ACCMODE | O_NONBLOCK);
file->private_data = priv;
return file;
err_dput:
path_put(&path);
err_module:
err:
iput(anon_inode_inode);
module_put(fops->owner);
return file;
}

2
fs/bad_inode.c
View File

@ -134,7 +134,7 @@ static int bad_inode_update_time(struct inode *inode, struct timespec64 *time,
static int bad_inode_atomic_open(struct inode *inode, struct dentry *dentry,
struct file *file, unsigned int open_flag,
umode_t create_mode, int *opened)
umode_t create_mode)
{
return -EIO;
}

2
fs/binfmt_misc.c
View File

@ -205,7 +205,7 @@ static int load_misc_binary(struct linux_binprm *bprm)
goto error;
if (fmt->flags & MISC_FMT_OPEN_FILE) {
interp_file = filp_clone_open(fmt->interp_file);
interp_file = file_clone_open(fmt->interp_file);
if (!IS_ERR(interp_file))
deny_write_access(interp_file);
} else {

7
fs/ceph/file.c
View File

@ -429,8 +429,7 @@ int ceph_open(struct inode *inode, struct file *file)
* file or symlink, return 1 so the VFS can retry.
*/
int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
struct file *file, unsigned flags, umode_t mode,
int *opened)
struct file *file, unsigned flags, umode_t mode)
{
struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
struct ceph_mds_client *mdsc = fsc->mdsc;
@ -507,9 +506,9 @@ int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
dout("atomic_open finish_open on dn %p\n", dn);
if (req->r_op == CEPH_MDS_OP_CREATE && req->r_reply_info.has_create_ino) {
ceph_init_inode_acls(d_inode(dentry), &acls);
*opened |= FILE_CREATED;
file->f_mode |= FMODE_CREATED;
}
err = finish_open(file, dentry, ceph_open, opened);
err = finish_open(file, dentry, ceph_open);
}
out_req:
if (!req->r_err && req->r_target_inode)

3
fs/ceph/super.h
View File

@ -1025,8 +1025,7 @@ extern const struct file_operations ceph_file_fops;
extern int ceph_renew_caps(struct inode *inode);
extern int ceph_open(struct inode *inode, struct file *file);
extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
struct file *file, unsigned flags, umode_t mode,
int *opened);
struct file *file, unsigned flags, umode_t mode);
extern int ceph_release(struct inode *inode, struct file *filp);
extern void ceph_fill_inline_data(struct inode *inode, struct page *locked_page,
char *data, size_t len);

3
fs/cifs/cifsfs.h
View File

@ -65,8 +65,7 @@ extern struct inode *cifs_root_iget(struct super_block *);
extern int cifs_create(struct inode *, struct dentry *, umode_t,
bool excl);
extern int cifs_atomic_open(struct inode *, struct dentry *,
struct file *, unsigned, umode_t,
int *);
struct file *, unsigned, umode_t);
extern struct dentry *cifs_lookup(struct inode *, struct dentry *,
unsigned int);
extern int cifs_unlink(struct inode *dir, struct dentry *dentry);

7
fs/cifs/dir.c
View File

@ -465,8 +465,7 @@ cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid,
int
cifs_atomic_open(struct inode *inode, struct dentry *direntry,
struct file *file, unsigned oflags, umode_t mode,
int *opened)
struct file *file, unsigned oflags, umode_t mode)
{
int rc;
unsigned int xid;
@ -539,9 +538,9 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
}
if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
*opened |= FILE_CREATED;
file->f_mode |= FMODE_CREATED;
rc = finish_open(file, direntry, generic_file_open, opened);
rc = finish_open(file, direntry, generic_file_open);
if (rc) {
if (server->ops->close)
server->ops->close(xid, tcon, &fid);

85
fs/file_table.c
View File

@ -51,6 +51,7 @@ static void file_free_rcu(struct rcu_head *head)
static inline void file_free(struct file *f)
{
security_file_free(f);
percpu_counter_dec(&nr_files);
call_rcu(&f->f_u.fu_rcuhead, file_free_rcu);
}
@ -100,9 +101,8 @@ int proc_nr_files(struct ctl_table *table, int write,
* done, you will imbalance int the mount's writer count
* and a warning at __fput() time.
*/
struct file *get_empty_filp(void)
struct file *alloc_empty_file(int flags, const struct cred *cred)
{
const struct cred *cred = current_cred();
static long old_max;
struct file *f;
int error;
@ -123,11 +123,10 @@ struct file *get_empty_filp(void)
if (unlikely(!f))
return ERR_PTR(-ENOMEM);
percpu_counter_inc(&nr_files);
f->f_cred = get_cred(cred);
error = security_file_alloc(f);
if (unlikely(error)) {
file_free(f);
file_free_rcu(&f->f_u.fu_rcuhead);
return ERR_PTR(error);
}
@ -136,7 +135,10 @@ struct file *get_empty_filp(void)
spin_lock_init(&f->f_lock);
mutex_init(&f->f_pos_lock);
eventpoll_init_file(f);
f->f_flags = flags;
f->f_mode = OPEN_FMODE(flags);
/* f->f_version: 0 */
percpu_counter_inc(&nr_files);
return f;
over:
@ -152,15 +154,15 @@ struct file *get_empty_filp(void)
* alloc_file - allocate and initialize a 'struct file'
*
* @path: the (dentry, vfsmount) pair for the new file
* @mode: the mode with which the new file will be opened
* @flags: O_... flags with which the new file will be opened
* @fop: the 'struct file_operations' for the new file
*/
struct file *alloc_file(const struct path *path, fmode_t mode,
static struct file *alloc_file(const struct path *path, int flags,
const struct file_operations *fop)
{
struct file *file;
file = get_empty_filp();
file = alloc_empty_file(flags, current_cred());
if (IS_ERR(file))
return file;
@ -168,19 +170,56 @@ struct file *alloc_file(const struct path *path, fmode_t mode,
file->f_inode = path->dentry->d_inode;
file->f_mapping = path->dentry->d_inode->i_mapping;
file->f_wb_err = filemap_sample_wb_err(file->f_mapping);
if ((mode & FMODE_READ) &&
if ((file->f_mode & FMODE_READ) &&
likely(fop->read || fop->read_iter))
mode |= FMODE_CAN_READ;
if ((mode & FMODE_WRITE) &&
file->f_mode |= FMODE_CAN_READ;
if ((file->f_mode & FMODE_WRITE) &&
likely(fop->write || fop->write_iter))
mode |= FMODE_CAN_WRITE;
file->f_mode = mode;
file->f_mode |= FMODE_CAN_WRITE;
file->f_mode |= FMODE_OPENED;
file->f_op = fop;
if ((mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ)
if ((file->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ)
i_readcount_inc(path->dentry->d_inode);
return file;
}
EXPORT_SYMBOL(alloc_file);
struct file *alloc_file_pseudo(struct inode *inode, struct vfsmount *mnt,
const char *name, int flags,
const struct file_operations *fops)
{
static const struct dentry_operations anon_ops = {
.d_dname = simple_dname
};
struct qstr this = QSTR_INIT(name, strlen(name));
struct path path;
struct file *file;
path.dentry = d_alloc_pseudo(mnt->mnt_sb, &this);
if (!path.dentry)
return ERR_PTR(-ENOMEM);
if (!mnt->mnt_sb->s_d_op)
d_set_d_op(path.dentry, &anon_ops);
path.mnt = mntget(mnt);
d_instantiate(path.dentry, inode);
file = alloc_file(&path, flags, fops);
if (IS_ERR(file)) {
ihold(inode);
path_put(&path);
}
return file;
}
EXPORT_SYMBOL(alloc_file_pseudo);
struct file *alloc_file_clone(struct file *base, int flags,
const struct file_operations *fops)
{
struct file *f = alloc_file(&base->f_path, flags, fops);
if (!IS_ERR(f)) {
path_get(&f->f_path);
f->f_mapping = base->f_mapping;
}
return f;
}
/* the real guts of fput() - releasing the last reference to file
*/
@ -190,6 +229,9 @@ static void __fput(struct file *file)
struct vfsmount *mnt = file->f_path.mnt;
struct inode *inode = file->f_inode;
if (unlikely(!(file->f_mode & FMODE_OPENED)))
goto out;
might_sleep();
fsnotify_close(file);
@ -207,7 +249,6 @@ static void __fput(struct file *file)
}
if (file->f_op->release)
file->f_op->release(inode, file);
security_file_free(file);
if (unlikely(S_ISCHR(inode->i_mode) && inode->i_cdev != NULL &&
!(file->f_mode & FMODE_PATH))) {
cdev_put(inode->i_cdev);
@ -220,12 +261,10 @@ static void __fput(struct file *file)
put_write_access(inode);
__mnt_drop_write(mnt);
}
file->f_path.dentry = NULL;
file->f_path.mnt = NULL;
file->f_inode = NULL;
file_free(file);
dput(dentry);
mntput(mnt);
out:
file_free(file);
}
static LLIST_HEAD(delayed_fput_list);
@ -300,14 +339,6 @@ void __fput_sync(struct file *file)
EXPORT_SYMBOL(fput);
void put_filp(struct file *file)
{
if (atomic_long_dec_and_test(&file->f_count)) {
security_file_free(file);
file_free(file);
}
}
void __init files_init(void)
{
filp_cachep = kmem_cache_create("filp", sizeof(struct file), 0,

10
fs/fuse/dir.c
View File

@ -399,7 +399,7 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
*/
static int fuse_create_open(struct inode *dir, struct dentry *entry,
struct file *file, unsigned flags,
umode_t mode, int *opened)
umode_t mode)
{
int err;
struct inode *inode;
@ -469,7 +469,7 @@ 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);
err = finish_open(file, entry, generic_file_open, opened);
err = finish_open(file, entry, generic_file_open);
if (err) {
fuse_sync_release(ff, flags);
} else {
@ -489,7 +489,7 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry,
static int fuse_mknod(struct inode *, struct dentry *, umode_t, dev_t);
static int fuse_atomic_open(struct inode *dir, struct dentry *entry,
struct file *file, unsigned flags,
umode_t mode, int *opened)
umode_t mode)
{
int err;
struct fuse_conn *fc = get_fuse_conn(dir);
@ -508,12 +508,12 @@ static int fuse_atomic_open(struct inode *dir, struct dentry *entry,
goto no_open;
/* Only creates */
*opened |= FILE_CREATED;
file->f_mode |= FMODE_CREATED;
if (fc->no_create)
goto mknod;
err = fuse_create_open(dir, entry, file, flags, mode, opened);
err = fuse_create_open(dir, entry, file, flags, mode);
if (err == -ENOSYS) {
fc->no_create = 1;
goto mknod;

32
fs/gfs2/inode.c
View File

@ -580,7 +580,7 @@ static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
struct file *file,
umode_t mode, dev_t dev, const char *symname,
unsigned int size, int excl, int *opened)
unsigned int size, int excl)
{
const struct qstr *name = &dentry->d_name;
struct posix_acl *default_acl, *acl;
@ -626,7 +626,7 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
error = 0;
if (file) {
if (S_ISREG(inode->i_mode))
error = finish_open(file, dentry, gfs2_open_common, opened);
error = finish_open(file, dentry, gfs2_open_common);
else
error = finish_no_open(file, NULL);
}
@ -767,8 +767,8 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
mark_inode_dirty(inode);
d_instantiate(dentry, inode);
if (file) {
*opened |= FILE_CREATED;
error = finish_open(file, dentry, gfs2_open_common, opened);
file->f_mode |= FMODE_CREATED;
error = finish_open(file, dentry, gfs2_open_common);
}
gfs2_glock_dq_uninit(ghs);
gfs2_glock_dq_uninit(ghs + 1);
@ -822,7 +822,7 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
static int gfs2_create(struct inode *dir, struct dentry *dentry,
umode_t mode, bool excl)
{
return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl, NULL);
return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl);
}
/**
@ -830,14 +830,13 @@ static int gfs2_create(struct inode *dir, struct dentry *dentry,
* @dir: The directory inode
* @dentry: The dentry of the new inode
* @file: File to be opened
* @opened: atomic_open flags
*
*
* Returns: errno
*/
static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry,
struct file *file, int *opened)
struct file *file)
{
struct inode *inode;
struct dentry *d;
@ -866,7 +865,7 @@ static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry,
return d;
}
if (file && S_ISREG(inode->i_mode))
error = finish_open(file, dentry, gfs2_open_common, opened);
error = finish_open(file, dentry, gfs2_open_common);
gfs2_glock_dq_uninit(&gh);
if (error) {
@ -879,7 +878,7 @@ static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry,
static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
unsigned flags)
{
return __gfs2_lookup(dir, dentry, NULL, NULL);
return __gfs2_lookup(dir, dentry, NULL);
}
/**
@ -1189,7 +1188,7 @@ static int gfs2_symlink(struct inode *dir, struct dentry *dentry,
if (size >= gfs2_max_stuffed_size(GFS2_I(dir)))
return -ENAMETOOLONG;
return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0, NULL);
return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0);
}
/**
@ -1204,7 +1203,7 @@ static int gfs2_symlink(struct inode *dir, struct dentry *dentry,
static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
{
unsigned dsize = gfs2_max_stuffed_size(GFS2_I(dir));
return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0, NULL);
return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0);
}
/**
@ -1219,7 +1218,7 @@ static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
dev_t dev)
{
return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0, NULL);
return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0);
}
/**
@ -1229,14 +1228,13 @@ static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
* @file: The proposed new struct file
* @flags: open flags
* @mode: File mode
* @opened: Flag to say whether the file has been opened or not
*
* Returns: error code or 0 for success
*/
static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry,
struct file *file, unsigned flags,
umode_t mode, int *opened)
umode_t mode)
{
struct dentry *d;
bool excl = !!(flags & O_EXCL);
@ -1244,13 +1242,13 @@ static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry,
if (!d_in_lookup(dentry))
goto skip_lookup;
d = __gfs2_lookup(dir, dentry, file, opened);
d = __gfs2_lookup(dir, dentry, file);
if (IS_ERR(d))
return PTR_ERR(d);
if (d != NULL)
dentry = d;
if (d_really_is_positive(dentry)) {
if (!(*opened & FILE_OPENED))
if (!(file->f_mode & FMODE_OPENED))
return finish_no_open(file, d);
dput(d);
return 0;
@ -1262,7 +1260,7 @@ static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry,
if (!(flags & O_CREAT))
return -ENOENT;
return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl, opened);
return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl);
}
/*

54
fs/hugetlbfs/inode.c
View File

@ -1310,10 +1310,6 @@ static int get_hstate_idx(int page_size_log)
return h - hstates;
}
static const struct dentry_operations anon_ops = {
.d_dname = simple_dname
};
/*
* Note that size should be aligned to proper hugepage size in caller side,
* otherwise hugetlb_reserve_pages reserves one less hugepages than intended.
@ -1322,19 +1318,18 @@ struct file *hugetlb_file_setup(const char *name, size_t size,
vm_flags_t acctflag, struct user_struct **user,
int creat_flags, int page_size_log)
{
struct file *file = ERR_PTR(-ENOMEM);
struct inode *inode;
struct path path;
struct super_block *sb;
struct qstr quick_string;
struct vfsmount *mnt;
int hstate_idx;
struct file *file;
hstate_idx = get_hstate_idx(page_size_log);
if (hstate_idx < 0)
return ERR_PTR(-ENODEV);
*user = NULL;
if (!hugetlbfs_vfsmount[hstate_idx])
mnt = hugetlbfs_vfsmount[hstate_idx];
if (!mnt)
return ERR_PTR(-ENOENT);
if (creat_flags == HUGETLB_SHMFS_INODE && !can_do_hugetlb_shm()) {
@ -1350,45 +1345,28 @@ struct file *hugetlb_file_setup(const char *name, size_t size,
}
}
sb = hugetlbfs_vfsmount[hstate_idx]->mnt_sb;
quick_string.name = name;
quick_string.len = strlen(quick_string.name);
quick_string.hash = 0;
path.dentry = d_alloc_pseudo(sb, &quick_string);
if (!path.dentry)
goto out_shm_unlock;
d_set_d_op(path.dentry, &anon_ops);
path.mnt = mntget(hugetlbfs_vfsmount[hstate_idx]);
file = ERR_PTR(-ENOSPC);
inode = hugetlbfs_get_inode(sb, NULL, S_IFREG | S_IRWXUGO, 0);
inode = hugetlbfs_get_inode(mnt->mnt_sb, NULL, S_IFREG | S_IRWXUGO, 0);
if (!inode)
goto out_dentry;
goto out;
if (creat_flags == HUGETLB_SHMFS_INODE)
inode->i_flags |= S_PRIVATE;
file = ERR_PTR(-ENOMEM);
if (hugetlb_reserve_pages(inode, 0,
size >> huge_page_shift(hstate_inode(inode)), NULL,
acctflag))
goto out_inode;
d_instantiate(path.dentry, inode);
inode->i_size = size;
clear_nlink(inode);
file = alloc_file(&path, FMODE_WRITE | FMODE_READ,
&hugetlbfs_file_operations);
if (IS_ERR(file))
goto out_dentry; /* inode is already attached */
if (hugetlb_reserve_pages(inode, 0,
size >> huge_page_shift(hstate_inode(inode)), NULL,
acctflag))
file = ERR_PTR(-ENOMEM);
else
file = alloc_file_pseudo(inode, mnt, name, O_RDWR,
&hugetlbfs_file_operations);
if (!IS_ERR(file))
return file;
return file;
out_inode:
iput(inode);
out_dentry:
path_put(&path);
out_shm_unlock:
out:
if (*user) {
user_shm_unlock(size, *user);
*user = NULL;

5
fs/internal.h
View File

@ -93,7 +93,7 @@ extern void chroot_fs_refs(const struct path *, const struct path *);
/*
* file_table.c
*/
extern struct file *get_empty_filp(void);
extern struct file *alloc_empty_file(int, const struct cred *);
/*
* super.c
@ -125,8 +125,7 @@ int do_fchmodat(int dfd, const char __user *filename, umode_t mode);
int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
int flag);
extern int open_check_o_direct(struct file *f);
extern int vfs_open(const struct path *, struct file *, const struct cred *);
extern int vfs_open(const struct path *, struct file *);
/*
* inode.c

225
fs/namei.c
View File

@ -2028,6 +2028,8 @@ static int link_path_walk(const char *name, struct nameidata *nd)
{
int err;
if (IS_ERR(name))
return PTR_ERR(name);
while (*name=='/')
name++;
if (!*name)
@ -2125,12 +2127,15 @@ static int link_path_walk(const char *name, struct nameidata *nd)
}
}
/* must be paired with terminate_walk() */
static const char *path_init(struct nameidata *nd, unsigned flags)
{
const char *s = nd->name->name;
if (!*s)
flags &= ~LOOKUP_RCU;
if (flags & LOOKUP_RCU)
rcu_read_lock();
nd->last_type = LAST_ROOT; /* if there are only slashes... */
nd->flags = flags | LOOKUP_JUMPED | LOOKUP_PARENT;
@ -2143,7 +2148,6 @@ static const char *path_init(struct nameidata *nd, unsigned flags)
nd->path = nd->root;
nd->inode = inode;
if (flags & LOOKUP_RCU) {
rcu_read_lock();
nd->seq = __read_seqcount_begin(&nd->path.dentry->d_seq);
nd->root_seq = nd->seq;
nd->m_seq = read_seqbegin(&mount_lock);
@ -2159,21 +2163,15 @@ static const char *path_init(struct nameidata *nd, unsigned flags)
nd->m_seq = read_seqbegin(&mount_lock);
if (*s == '/') {
if (flags & LOOKUP_RCU)
rcu_read_lock();
set_root(nd);
if (likely(!nd_jump_root(nd)))
return s;
nd->root.mnt = NULL;
rcu_read_unlock();
return ERR_PTR(-ECHILD);
} else if (nd->dfd == AT_FDCWD) {
if (flags & LOOKUP_RCU) {
struct fs_struct *fs = current->fs;
unsigned seq;
rcu_read_lock();
do {
seq = read_seqcount_begin(&fs->seq);
nd->path = fs->pwd;
@ -2195,16 +2193,13 @@ static const char *path_init(struct nameidata *nd, unsigned flags)
dentry = f.file->f_path.dentry;
if (*s) {
if (!d_can_lookup(dentry)) {
fdput(f);
return ERR_PTR(-ENOTDIR);
}
if (*s && unlikely(!d_can_lookup(dentry))) {
fdput(f);
return ERR_PTR(-ENOTDIR);
}
nd->path = f.file->f_path;
if (flags & LOOKUP_RCU) {
rcu_read_lock();
nd->inode = nd->path.dentry->d_inode;
nd->seq = read_seqcount_begin(&nd->path.dentry->d_seq);
} else {
@ -2272,24 +2267,15 @@ static int path_lookupat(struct nameidata *nd, unsigned flags, struct path *path
const char *s = path_init(nd, flags);
int err;
if (IS_ERR(s))
return PTR_ERR(s);
if (unlikely(flags & LOOKUP_DOWN)) {
if (unlikely(flags & LOOKUP_DOWN) && !IS_ERR(s)) {
err = handle_lookup_down(nd);
if (unlikely(err < 0)) {
terminate_walk(nd);
return err;
}
if (unlikely(err < 0))
s = ERR_PTR(err);
}
while (!(err = link_path_walk(s, nd))
&& ((err = lookup_last(nd)) > 0)) {
s = trailing_symlink(nd);
if (IS_ERR(s)) {
err = PTR_ERR(s);
break;
}
}
if (!err)
err = complete_walk(nd);
@ -2336,10 +2322,7 @@ static int path_parentat(struct nameidata *nd, unsigned flags,
struct path *parent)
{
const char *s = path_init(nd, flags);
int err;
if (IS_ERR(s))
return PTR_ERR(s);
err = link_path_walk(s, nd);
int err = link_path_walk(s, nd);
if (!err)
err = complete_walk(nd);
if (!err) {
@ -2666,15 +2649,10 @@ path_mountpoint(struct nameidata *nd, unsigned flags, struct path *path)
{
const char *s = path_init(nd, flags);
int err;
if (IS_ERR(s))
return PTR_ERR(s);
while (!(err = link_path_walk(s, nd)) &&
(err = mountpoint_last(nd)) > 0) {
s = trailing_symlink(nd);
if (IS_ERR(s)) {
err = PTR_ERR(s);
break;
}
}
if (!err) {
*path = nd->path;
@ -3027,17 +3005,16 @@ static int may_o_create(const struct path *dir, struct dentry *dentry, umode_t m
* Returns 0 if successful. The file will have been created and attached to
* @file by the filesystem calling finish_open().
*
* Returns 1 if the file was looked up only or didn't need creating. The
* caller will need to perform the open themselves. @path will have been
* updated to point to the new dentry. This may be negative.
* If the file was looked up only or didn't need creating, FMODE_OPENED won't
* be set. The caller will need to perform the open themselves. @path will
* have been updated to point to the new dentry. This may be negative.
*
* Returns an error code otherwise.
*/
static int atomic_open(struct nameidata *nd, struct dentry *dentry,
struct path *path, struct file *file,
const struct open_flags *op,
int open_flag, umode_t mode,
int *opened)
int open_flag, umode_t mode)
{
struct dentry *const DENTRY_NOT_SET = (void *) -1UL;
struct inode *dir = nd->path.dentry->d_inode;
@ -3052,39 +3029,38 @@ static int atomic_open(struct nameidata *nd, struct dentry *dentry,
file->f_path.dentry = DENTRY_NOT_SET;
file->f_path.mnt = nd->path.mnt;
error = dir->i_op->atomic_open(dir, dentry, file,
open_to_namei_flags(open_flag),
mode, opened);
open_to_namei_flags(open_flag), mode);
d_lookup_done(dentry);
if (!error) {
/*
* We didn't have the inode before the open, so check open
* permission here.
*/
int acc_mode = op->acc_mode;
if (*opened & FILE_CREATED) {
WARN_ON(!(open_flag & O_CREAT));
fsnotify_create(dir, dentry);
acc_mode = 0;
}
error = may_open(&file->f_path, acc_mode, open_flag);
if (WARN_ON(error > 0))
error = -EINVAL;
} else if (error > 0) {
if (WARN_ON(file->f_path.dentry == DENTRY_NOT_SET)) {
if (file->f_mode & FMODE_OPENED) {
/*
* We didn't have the inode before the open, so check open
* permission here.
*/
int acc_mode = op->acc_mode;
if (file->f_mode & FMODE_CREATED) {
WARN_ON(!(open_flag & O_CREAT));
fsnotify_create(dir, dentry);
acc_mode = 0;
}
error = may_open(&file->f_path, acc_mode, open_flag);
if (WARN_ON(error > 0))
error = -EINVAL;
} else if (WARN_ON(file->f_path.dentry == DENTRY_NOT_SET)) {
error = -EIO;
} else {
if (file->f_path.dentry) {
dput(dentry);
dentry = file->f_path.dentry;
}
if (*opened & FILE_CREATED)
if (file->f_mode & FMODE_CREATED)
fsnotify_create(dir, dentry);
if (unlikely(d_is_negative(dentry))) {
error = -ENOENT;
} else {
path->dentry = dentry;
path->mnt = nd->path.mnt;
return 1;
return 0;
}
}
}
@ -3095,25 +3071,22 @@ static int atomic_open(struct nameidata *nd, struct dentry *dentry,
/*
* Look up and maybe create and open the last component.
*
* Must be called with i_mutex held on parent.
* Must be called with parent locked (exclusive in O_CREAT case).
*
* Returns 0 if the file was successfully atomically created (if necessary) and
* opened. In this case the file will be returned attached to @file.
* Returns 0 on success, that is, if
* the file was successfully atomically created (if necessary) and opened, or
* the file was not completely opened at this time, though lookups and
* creations were performed.
* These case are distinguished by presence of FMODE_OPENED on file->f_mode.
* In the latter case dentry returned in @path might be negative if O_CREAT
* hadn't been specified.
*
* Returns 1 if the file was not completely opened at this time, though lookups
* and creations will have been performed and the dentry returned in @path will
* be positive upon return if O_CREAT was specified. If O_CREAT wasn't
* specified then a negative dentry may be returned.
*
* An error code is returned otherwise.
*
* FILE_CREATE will be set in @*opened if the dentry was created and will be
* cleared otherwise prior to returning.
* An error code is returned on failure.
*/
static int lookup_open(struct nameidata *nd, struct path *path,
struct file *file,
const struct open_flags *op,
bool got_write, int *opened)
bool got_write)
{
struct dentry *dir = nd->path.dentry;
struct inode *dir_inode = dir->d_inode;
@ -3126,7 +3099,7 @@ static int lookup_open(struct nameidata *nd, struct path *path,
if (unlikely(IS_DEADDIR(dir_inode)))
return -ENOENT;
*opened &= ~FILE_CREATED;
file->f_mode &= ~FMODE_CREATED;
dentry = d_lookup(dir, &nd->last);
for (;;) {
if (!dentry) {
@ -3188,7 +3161,7 @@ static int lookup_open(struct nameidata *nd, struct path *path,
if (dir_inode->i_op->atomic_open) {
error = atomic_open(nd, dentry, path, file, op, open_flag,
mode, opened);
mode);
if (unlikely(error == -ENOENT) && create_error)
error = create_error;
return error;
@ -3211,7 +3184,7 @@ static int lookup_open(struct nameidata *nd, struct path *path,
/* Negative dentry, just create the file */
if (!dentry->d_inode && (open_flag & O_CREAT)) {
*opened |= FILE_CREATED;
file->f_mode |= FMODE_CREATED;
audit_inode_child(dir_inode, dentry, AUDIT_TYPE_CHILD_CREATE);
if (!dir_inode->i_op->create) {
error = -EACCES;
@ -3230,7 +3203,7 @@ static int lookup_open(struct nameidata *nd, struct path *path,
out_no_open:
path->dentry = dentry;
path->mnt = nd->path.mnt;
return 1;
return 0;
out_dput:
dput(dentry);
@ -3241,8 +3214,7 @@ static int lookup_open(struct nameidata *nd, struct path *path,
* Handle the last step of open()
*/
static int do_last(struct nameidata *nd,
struct file *file, const struct open_flags *op,
int *opened)
struct file *file, const struct open_flags *op)
{
struct dentry *dir = nd->path.dentry;
int open_flag = op->open_flag;
@ -3308,17 +3280,17 @@ static int do_last(struct nameidata *nd,
inode_lock(dir->d_inode);
else
inode_lock_shared(dir->d_inode);
error = lookup_open(nd, &path, file, op, got_write, opened);
error = lookup_open(nd, &path, file, op, got_write);
if (open_flag & O_CREAT)
inode_unlock(dir->d_inode);
else
inode_unlock_shared(dir->d_inode);
if (error <= 0) {
if (error)
goto out;
if (error)
goto out;
if ((*opened & FILE_CREATED) ||
if (file->f_mode & FMODE_OPENED) {
if ((file->f_mode & FMODE_CREATED) ||
!S_ISREG(file_inode(file)->i_mode))
will_truncate = false;
@ -3326,7 +3298,7 @@ static int do_last(struct nameidata *nd,
goto opened;
}
if (*opened & FILE_CREATED) {
if (file->f_mode & FMODE_CREATED) {
/* Don't check for write permission, don't truncate */
open_flag &= ~O_TRUNC;
will_truncate = false;
@ -3395,20 +3367,15 @@ static int do_last(struct nameidata *nd,
error = may_open(&nd->path, acc_mode, open_flag);
if (error)
goto out;
BUG_ON(*opened & FILE_OPENED); /* once it's opened, it's opened */
error = vfs_open(&nd->path, file, current_cred());
BUG_ON(file->f_mode & FMODE_OPENED); /* once it's opened, it's opened */
error = vfs_open(&nd->path, file);
if (error)
goto out;
*opened |= FILE_OPENED;
opened:
error = open_check_o_direct(file);
if (!error)
error = ima_file_check(file, op->acc_mode, *opened);
error = ima_file_check(file, op->acc_mode);
if (!error && will_truncate)
error = handle_truncate(file);
out:
if (unlikely(error) && (*opened & FILE_OPENED))
fput(file);
if (unlikely(error > 0)) {
WARN_ON(1);
error = -EINVAL;
@ -3458,7 +3425,7 @@ EXPORT_SYMBOL(vfs_tmpfile);
static int do_tmpfile(struct nameidata *nd, unsigned flags,
const struct open_flags *op,
struct file *file, int *opened)
struct file *file)
{
struct dentry *child;
struct path path;
@ -3480,12 +3447,7 @@ static int do_tmpfile(struct nameidata *nd, unsigned flags,
if (error)
goto out2;
file->f_path.mnt = path.mnt;
error = finish_open(file, child, NULL, opened);
if (error)
goto out2;
error = open_check_o_direct(file);
if (error)
fput(file);
error = finish_open(file, child, NULL);
out2:
mnt_drop_write(path.mnt);
out:
@ -3499,7 +3461,7 @@ static int do_o_path(struct nameidata *nd, unsigned flags, struct file *file)
int error = path_lookupat(nd, flags, &path);
if (!error) {
audit_inode(nd->name, path.dentry, 0);
error = vfs_open(&path, file, current_cred());
error = vfs_open(&path, file);
path_put(&path);
}
return error;
@ -3508,59 +3470,40 @@ static int do_o_path(struct nameidata *nd, unsigned flags, struct file *file)
static struct file *path_openat(struct nameidata *nd,
const struct open_flags *op, unsigned flags)
{
const char *s;
struct file *file;
int opened = 0;
int error;
file = get_empty_filp();
file = alloc_empty_file(op->open_flag, current_cred());
if (IS_ERR(file))
return file;
file->f_flags = op->open_flag;
if (unlikely(file->f_flags & __O_TMPFILE)) {
error = do_tmpfile(nd, flags, op, file, &opened);
goto out2;
}
if (unlikely(file->f_flags & O_PATH)) {
error = do_tmpfile(nd, flags, op, file);
} else if (unlikely(file->f_flags & O_PATH)) {
error = do_o_path(nd, flags, file);
if (!error)
opened |= FILE_OPENED;
goto out2;
}
s = path_init(nd, flags);
if (IS_ERR(s)) {
put_filp(file);
return ERR_CAST(s);
}
while (!(error = link_path_walk(s, nd)) &&
(error = do_last(nd, file, op, &opened)) > 0) {
nd->flags &= ~(LOOKUP_OPEN|LOOKUP_CREATE|LOOKUP_EXCL);
s = trailing_symlink(nd);
if (IS_ERR(s)) {
error = PTR_ERR(s);
break;
} else {
const char *s = path_init(nd, flags);
while (!(error = link_path_walk(s, nd)) &&
(error = do_last(nd, file, op)) > 0) {
nd->flags &= ~(LOOKUP_OPEN|LOOKUP_CREATE|LOOKUP_EXCL);
s = trailing_symlink(nd);
}
terminate_walk(nd);
}
terminate_walk(nd);
out2:
if (!(opened & FILE_OPENED)) {
BUG_ON(!error);
put_filp(file);
if (likely(!error)) {
if (likely(file->f_mode & FMODE_OPENED))
return file;
WARN_ON(1);
error = -EINVAL;
}
if (unlikely(error)) {
if (error == -EOPENSTALE) {
if (flags & LOOKUP_RCU)
error = -ECHILD;
else
error = -ESTALE;
}
file = ERR_PTR(error);
fput(file);
if (error == -EOPENSTALE) {
if (flags & LOOKUP_RCU)
error = -ECHILD;
else
error = -ESTALE;
}
return file;
return ERR_PTR(error);
}
struct file *do_filp_open(int dfd, struct filename *pathname,

14
fs/nfs/dir.c
View File

@ -1434,12 +1434,11 @@ static int do_open(struct inode *inode, struct file *filp)
static int nfs_finish_open(struct nfs_open_context *ctx,
struct dentry *dentry,
struct file *file, unsigned open_flags,
int *opened)
struct file *file, unsigned open_flags)
{
int err;
err = finish_open(file, dentry, do_open, opened);
err = finish_open(file, dentry, do_open);
if (err)
goto out;
if (S_ISREG(file->f_path.dentry->d_inode->i_mode))
@ -1452,7 +1451,7 @@ static int nfs_finish_open(struct nfs_open_context *ctx,
int nfs_atomic_open(struct inode *dir, struct dentry *dentry,
struct file *file, unsigned open_flags,
umode_t mode, int *opened)
umode_t mode)
{
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
struct nfs_open_context *ctx;
@ -1461,6 +1460,7 @@ int nfs_atomic_open(struct inode *dir, struct dentry *dentry,
struct inode *inode;
unsigned int lookup_flags = 0;
bool switched = false;
int created = 0;
int err;
/* Expect a negative dentry */
@ -1521,7 +1521,9 @@ int nfs_atomic_open(struct inode *dir, struct dentry *dentry,
goto out;
trace_nfs_atomic_open_enter(dir, ctx, open_flags);
inode = NFS_PROTO(dir)->open_context(dir, ctx, open_flags, &attr, opened);
inode = NFS_PROTO(dir)->open_context(dir, ctx, open_flags, &attr, &created);
if (created)
file->f_mode |= FMODE_CREATED;
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
trace_nfs_atomic_open_exit(dir, ctx, open_flags, err);
@ -1546,7 +1548,7 @@ int nfs_atomic_open(struct inode *dir, struct dentry *dentry,
goto out;
}
err = nfs_finish_open(ctx, ctx->dentry, file, open_flags, opened);
err = nfs_finish_open(ctx, ctx->dentry, file, open_flags);
trace_nfs_atomic_open_exit(dir, ctx, open_flags, err);
put_nfs_open_context(ctx);
out:

2
fs/nfs/nfs4_fs.h
View File

@ -258,7 +258,7 @@ extern const struct dentry_operations nfs4_dentry_operations;
/* dir.c */
int nfs_atomic_open(struct inode *, struct dentry *, struct file *,
unsigned, umode_t, int *);
unsigned, umode_t);
/* super.c */
extern struct file_system_type nfs4_fs_type;

2
fs/nfs/nfs4proc.c
View File

@ -2951,7 +2951,7 @@ static int _nfs4_do_open(struct inode *dir,
}
}
if (opened && opendata->file_created)
*opened |= FILE_CREATED;
*opened = 1;
if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
*ctx_th = opendata->f_attr.mdsthreshold;

2
fs/nfsd/vfs.c
View File

@ -763,7 +763,7 @@ nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type,
goto out_nfserr;
}
host_err = ima_file_check(file, may_flags, 0);
host_err = ima_file_check(file, may_flags);
if (host_err) {
fput(file);
goto out_nfserr;

88
fs/open.c
View File

@ -724,27 +724,13 @@ SYSCALL_DEFINE3(fchown, unsigned int, fd, uid_t, user, gid_t, group)
return ksys_fchown(fd, user, group);
}
int open_check_o_direct(struct file *f)
{
/* NB: we're sure to have correct a_ops only after f_op->open */
if (f->f_flags & O_DIRECT) {
if (!f->f_mapping->a_ops || !f->f_mapping->a_ops->direct_IO)
return -EINVAL;
}
return 0;
}
static int do_dentry_open(struct file *f,
struct inode *inode,
int (*open)(struct inode *, struct file *),
const struct cred *cred)
int (*open)(struct inode *, struct file *))
{
static const struct file_operations empty_fops = {};
int error;
f->f_mode = OPEN_FMODE(f->f_flags) | FMODE_LSEEK |
FMODE_PREAD | FMODE_PWRITE;
path_get(&f->f_path);
f->f_inode = inode;
f->f_mapping = inode->i_mapping;
@ -753,7 +739,7 @@ static int do_dentry_open(struct file *f,
f->f_wb_err = filemap_sample_wb_err(f->f_mapping);
if (unlikely(f->f_flags & O_PATH)) {
f->f_mode = FMODE_PATH;
f->f_mode = FMODE_PATH | FMODE_OPENED;
f->f_op = &empty_fops;
return 0;
}
@ -780,7 +766,7 @@ static int do_dentry_open(struct file *f,
goto cleanup_all;
}
error = security_file_open(f, cred);
error = security_file_open(f);
if (error)
goto cleanup_all;
@ -788,6 +774,8 @@ static int do_dentry_open(struct file *f,
if (error)
goto cleanup_all;
/* normally all 3 are set; ->open() can clear them if needed */
f->f_mode |= FMODE_LSEEK | FMODE_PREAD | FMODE_PWRITE;
if (!open)
open = f->f_op->open;
if (open) {
@ -795,6 +783,7 @@ static int do_dentry_open(struct file *f,
if (error)
goto cleanup_all;
}
f->f_mode |= FMODE_OPENED;
if ((f->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ)
i_readcount_inc(inode);
if ((f->f_mode & FMODE_READ) &&
@ -809,9 +798,16 @@ static int do_dentry_open(struct file *f,
file_ra_state_init(&f->f_ra, f->f_mapping->host->i_mapping);
/* NB: we're sure to have correct a_ops only after f_op->open */
if (f->f_flags & O_DIRECT) {
if (!f->f_mapping->a_ops || !f->f_mapping->a_ops->direct_IO)
return -EINVAL;
}
return 0;
cleanup_all:
if (WARN_ON_ONCE(error > 0))
error = -EINVAL;
fops_put(f->f_op);
if (f->f_mode & FMODE_WRITER) {
put_write_access(inode);
@ -847,19 +843,12 @@ static int do_dentry_open(struct file *f,
* Returns zero on success or -errno if the open failed.
*/
int finish_open(struct file *file, struct dentry *dentry,
int (*open)(struct inode *, struct file *),
int *opened)
int (*open)(struct inode *, struct file *))
{
int error;
BUG_ON(*opened & FILE_OPENED); /* once it's opened, it's opened */
BUG_ON(file->f_mode & FMODE_OPENED); /* once it's opened, it's opened */
file->f_path.dentry = dentry;
error = do_dentry_open(file, d_backing_inode(dentry), open,
current_cred());
if (!error)
*opened |= FILE_OPENED;
return error;
return do_dentry_open(file, d_backing_inode(dentry), open);
}
EXPORT_SYMBOL(finish_open);
@ -874,13 +863,13 @@ EXPORT_SYMBOL(finish_open);
* NB: unlike finish_open() this function does consume the dentry reference and
* the caller need not dput() it.
*
* Returns "1" which must be the return value of ->atomic_open() after having
* Returns "0" which must be the return value of ->atomic_open() after having
* called this function.
*/
int finish_no_open(struct file *file, struct dentry *dentry)
{
file->f_path.dentry = dentry;
return 1;
return 0;
}
EXPORT_SYMBOL(finish_no_open);
@ -896,8 +885,7 @@ EXPORT_SYMBOL(file_path);
* @file: newly allocated file with f_flag initialized
* @cred: credentials to use
*/
int vfs_open(const struct path *path, struct file *file,
const struct cred *cred)
int vfs_open(const struct path *path, struct file *file)
{
struct dentry *dentry = d_real(path->dentry, NULL, file->f_flags, 0);
@ -905,7 +893,7 @@ int vfs_open(const struct path *path, struct file *file,
return PTR_ERR(dentry);
file->f_path = *path;
return do_dentry_open(file, d_backing_inode(dentry), NULL, cred);
return do_dentry_open(file, d_backing_inode(dentry), NULL);
}
struct file *dentry_open(const struct path *path, int flags,
@ -919,19 +907,11 @@ struct file *dentry_open(const struct path *path, int flags,
/* We must always pass in a valid mount pointer. */
BUG_ON(!path->mnt);
f = get_empty_filp();
f = alloc_empty_file(flags, cred);
if (!IS_ERR(f)) {
f->f_flags = flags;
error = vfs_open(path, f, cred);
if (!error) {
/* from now on we need fput() to dispose of f */
error = open_check_o_direct(f);
if (error) {
fput(f);
f = ERR_PTR(error);
}
} else {
put_filp(f);
error = vfs_open(path, f);
if (error) {
fput(f);
f = ERR_PTR(error);
}
}
@ -1063,26 +1043,6 @@ struct file *file_open_root(struct dentry *dentry, struct vfsmount *mnt,
}
EXPORT_SYMBOL(file_open_root);
struct file *filp_clone_open(struct file *oldfile)
{
struct file *file;
int retval;
file = get_empty_filp();
if (IS_ERR(file))
return file;
file->f_flags = oldfile->f_flags;
retval = vfs_open(&oldfile->f_path, file, oldfile->f_cred);
if (retval) {
put_filp(file);
return ERR_PTR(retval);
}
return file;
}
EXPORT_SYMBOL(filp_clone_open);
long do_sys_open(int dfd, const char __user *filename, int flags, umode_t mode)
{
struct open_flags op;

43
fs/pipe.c
View File

@ -741,54 +741,33 @@ static struct inode * get_pipe_inode(void)
int create_pipe_files(struct file **res, int flags)
{
int err;
struct inode *inode = get_pipe_inode();
struct file *f;
struct path path;
if (!inode)
return -ENFILE;
err = -ENOMEM;
path.dentry = d_alloc_pseudo(pipe_mnt->mnt_sb, &empty_name);
if (!path.dentry)
goto err_inode;
path.mnt = mntget(pipe_mnt);
d_instantiate(path.dentry, inode);
f = alloc_file(&path, FMODE_WRITE, &pipefifo_fops);
f = alloc_file_pseudo(inode, pipe_mnt, "",
O_WRONLY | (flags & (O_NONBLOCK | O_DIRECT)),
&pipefifo_fops);
if (IS_ERR(f)) {
err = PTR_ERR(f);
goto err_dentry;
free_pipe_info(inode->i_pipe);
iput(inode);
return PTR_ERR(f);
}
f->f_flags = O_WRONLY | (flags & (O_NONBLOCK | O_DIRECT));
f->private_data = inode->i_pipe;
res[0] = alloc_file(&path, FMODE_READ, &pipefifo_fops);
res[0] = alloc_file_clone(f, O_RDONLY | (flags & O_NONBLOCK),
&pipefifo_fops);
if (IS_ERR(res[0])) {
err = PTR_ERR(res[0]);
goto err_file;
put_pipe_info(inode, inode->i_pipe);
fput(f);
return PTR_ERR(res[0]);
}
path_get(&path);
res[0]->private_data = inode->i_pipe;
res[0]->f_flags = O_RDONLY | (flags & O_NONBLOCK);
res[1] = f;
return 0;
err_file:
put_filp(f);
err_dentry:
free_pipe_info(inode->i_pipe);
path_put(&path);
return err;
err_inode:
free_pipe_info(inode->i_pipe);
iput(inode);
return err;
}
static int __do_pipe_flags(int *fd, struct file **files, int flags)

8
include/linux/file.h
View File

@ -17,9 +17,12 @@ extern void fput(struct file *);
struct file_operations;
struct vfsmount;
struct dentry;
struct inode;
struct path;
extern struct file *alloc_file(const struct path *, fmode_t mode,
const struct file_operations *fop);
extern struct file *alloc_file_pseudo(struct inode *, struct vfsmount *,
const char *, int flags, const struct file_operations *);
extern struct file *alloc_file_clone(struct file *, int flags,
const struct file_operations *);
static inline void fput_light(struct file *file, int fput_needed)
{
@ -78,7 +81,6 @@ extern int f_dupfd(unsigned int from, struct file *file, unsigned flags);
extern int replace_fd(unsigned fd, struct file *file, unsigned flags);
extern void set_close_on_exec(unsigned int fd, int flag);
extern bool get_close_on_exec(unsigned int fd);
extern void put_filp(struct file *);
extern int get_unused_fd_flags(unsigned flags);
extern void put_unused_fd(unsigned int fd);

17
include/linux/fs.h
View File

@ -148,6 +148,9 @@ typedef int (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
/* Has write method(s) */
#define FMODE_CAN_WRITE ((__force fmode_t)0x40000)
#define FMODE_OPENED ((__force fmode_t)0x80000)
#define FMODE_CREATED ((__force fmode_t)0x100000)
/* File was opened by fanotify and shouldn't generate fanotify events */
#define FMODE_NONOTIFY ((__force fmode_t)0x4000000)
@ -1776,7 +1779,7 @@ struct inode_operations {
int (*update_time)(struct inode *, struct timespec64 *, int);
int (*atomic_open)(struct inode *, struct dentry *,
struct file *, unsigned open_flag,
umode_t create_mode, int *opened);
umode_t create_mode);
int (*tmpfile) (struct inode *, struct dentry *, umode_t);
int (*set_acl)(struct inode *, struct posix_acl *, int);
} ____cacheline_aligned;
@ -2420,7 +2423,10 @@ extern struct file *filp_open(const char *, int, umode_t);
extern struct file *file_open_root(struct dentry *, struct vfsmount *,
const char *, int, umode_t);
extern struct file * dentry_open(const struct path *, int, const struct cred *);
extern struct file *filp_clone_open(struct file *);
static inline struct file *file_clone_open(struct file *file)
{
return dentry_open(&file->f_path, file->f_flags, file->f_cred);
}
extern int filp_close(struct file *, fl_owner_t id);
extern struct filename *getname_flags(const char __user *, int, int *);
@ -2428,13 +2434,8 @@ extern struct filename *getname(const char __user *);
extern struct filename *getname_kernel(const char *);
extern void putname(struct filename *name);
enum {
FILE_CREATED = 1,
FILE_OPENED = 2
};
extern int finish_open(struct file *file, struct dentry *dentry,
int (*open)(struct inode *, struct file *),
int *opened);
int (*open)(struct inode *, struct file *));
extern int finish_no_open(struct file *file, struct dentry *dentry);
/* fs/ioctl.c */

4
include/linux/ima.h
View File

@ -16,7 +16,7 @@ struct linux_binprm;
#ifdef CONFIG_IMA
extern int ima_bprm_check(struct linux_binprm *bprm);
extern int ima_file_check(struct file *file, int mask, int opened);
extern int ima_file_check(struct file *file, int mask);
extern void ima_file_free(struct file *file);
extern int ima_file_mmap(struct file *file, unsigned long prot);
extern int ima_read_file(struct file *file, enum kernel_read_file_id id);
@ -34,7 +34,7 @@ static inline int ima_bprm_check(struct linux_binprm *bprm)
return 0;
}
static inline int ima_file_check(struct file *file, int mask, int opened)
static inline int ima_file_check(struct file *file, int mask)
{
return 0;
}

2
include/linux/lsm_hooks.h
View File

@ -1569,7 +1569,7 @@ union security_list_options {
int (*file_send_sigiotask)(struct task_struct *tsk,
struct fown_struct *fown, int sig);
int (*file_receive)(struct file *file);
int (*file_open)(struct file *file, const struct cred *cred);
int (*file_open)(struct file *file);
int (*task_alloc)(struct task_struct *task, unsigned long clone_flags);
void (*task_free)(struct task_struct *task);

5
include/linux/security.h
View File

@ -309,7 +309,7 @@ void security_file_set_fowner(struct file *file);
int security_file_send_sigiotask(struct task_struct *tsk,
struct fown_struct *fown, int sig);
int security_file_receive(struct file *file);
int security_file_open(struct file *file, const struct cred *cred);
int security_file_open(struct file *file);
int security_task_alloc(struct task_struct *task, unsigned long clone_flags);
void security_task_free(struct task_struct *task);
int security_cred_alloc_blank(struct cred *cred, gfp_t gfp);
@ -858,8 +858,7 @@ static inline int security_file_receive(struct file *file)
return 0;
}
static inline int security_file_open(struct file *file,
const struct cred *cred)
static inline int security_file_open(struct file *file)
{
return 0;
}

67
ipc/shm.c
View File

@ -1366,15 +1366,14 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg,
struct shmid_kernel *shp;
unsigned long addr = (unsigned long)shmaddr;
unsigned long size;
struct file *file;
struct file *file, *base;
int err;
unsigned long flags = MAP_SHARED;
unsigned long prot;
int acc_mode;
struct ipc_namespace *ns;
struct shm_file_data *sfd;
struct path path;
fmode_t f_mode;
int f_flags;
unsigned long populate = 0;
err = -EINVAL;
@ -1407,11 +1406,11 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg,
if (shmflg & SHM_RDONLY) {
prot = PROT_READ;
acc_mode = S_IRUGO;
f_mode = FMODE_READ;
f_flags = O_RDONLY;
} else {
prot = PROT_READ | PROT_WRITE;
acc_mode = S_IRUGO | S_IWUGO;
f_mode = FMODE_READ | FMODE_WRITE;
f_flags = O_RDWR;
}
if (shmflg & SHM_EXEC) {
prot |= PROT_EXEC;
@ -1447,35 +1446,6 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg,
goto out_unlock;
}
path = shp->shm_file->f_path;
path_get(&path);
shp->shm_nattch++;
size = i_size_read(d_inode(path.dentry));
ipc_unlock_object(&shp->shm_perm);
rcu_read_unlock();
err = -ENOMEM;
sfd = kzalloc(sizeof(*sfd), GFP_KERNEL);
if (!sfd) {
path_put(&path);
goto out_nattch;
}
file = alloc_file(&path, f_mode,
is_file_hugepages(shp->shm_file) ?
&shm_file_operations_huge :
&shm_file_operations);
err = PTR_ERR(file);
if (IS_ERR(file)) {
kfree(sfd);
path_put(&path);
goto out_nattch;
}
file->private_data = sfd;
file->f_mapping = shp->shm_file->f_mapping;
sfd->id = shp->shm_perm.id;
sfd->ns = get_ipc_ns(ns);
/*
* We need to take a reference to the real shm file to prevent the
* pointer from becoming stale in cases where the lifetime of the outer
@ -1485,8 +1455,35 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg,
* We'll deny the ->mmap() if the shm segment was since removed, but to
* detect shm ID reuse we need to compare the file pointers.
*/
sfd->file = get_file(shp->shm_file);
base = get_file(shp->shm_file);
shp->shm_nattch++;
size = i_size_read(file_inode(base));
ipc_unlock_object(&shp->shm_perm);
rcu_read_unlock();
err = -ENOMEM;
sfd = kzalloc(sizeof(*sfd), GFP_KERNEL);
if (!sfd) {
fput(base);
goto out_nattch;
}
file = alloc_file_clone(base, f_flags,
is_file_hugepages(base) ?
&shm_file_operations_huge :
&shm_file_operations);
err = PTR_ERR(file);
if (IS_ERR(file)) {
kfree(sfd);
fput(base);
goto out_nattch;
}
sfd->id = shp->shm_perm.id;
sfd->ns = get_ipc_ns(ns);
sfd->file = base;
sfd->vm_ops = NULL;
file->private_data = sfd;
err = security_mmap_file(file, prot, flags);
if (err)

2
mm/memfd.c
View File

@ -326,7 +326,7 @@ SYSCALL_DEFINE2(memfd_create,
goto err_fd;
}
file->f_mode |= FMODE_LSEEK | FMODE_PREAD | FMODE_PWRITE;
file->f_flags |= O_RDWR | O_LARGEFILE;
file->f_flags |= O_LARGEFILE;
if (flags & MFD_ALLOW_SEALING) {
file_seals = memfd_file_seals_ptr(file);

49
mm/shmem.c
View File

@ -3897,18 +3897,11 @@ EXPORT_SYMBOL_GPL(shmem_truncate_range);
/* common code */
static const struct dentry_operations anon_ops = {
.d_dname = simple_dname
};
static struct file *__shmem_file_setup(struct vfsmount *mnt, const char *name, loff_t size,
unsigned long flags, unsigned int i_flags)
{
struct file *res;
struct inode *inode;
struct path path;
struct super_block *sb;
struct qstr this;
struct file *res;
if (IS_ERR(mnt))
return ERR_CAST(mnt);
@ -3919,41 +3912,21 @@ static struct file *__shmem_file_setup(struct vfsmount *mnt, const char *name, l
if (shmem_acct_size(flags, size))
return ERR_PTR(-ENOMEM);
res = ERR_PTR(-ENOMEM);
this.name = name;
this.len = strlen(name);
this.hash = 0; /* will go */
sb = mnt->mnt_sb;
path.mnt = mntget(mnt);
path.dentry = d_alloc_pseudo(sb, &this);
if (!path.dentry)
goto put_memory;
d_set_d_op(path.dentry, &anon_ops);
res = ERR_PTR(-ENOSPC);
inode = shmem_get_inode(sb, NULL, S_IFREG | 0777, 0, flags);
if (!inode)
goto put_memory;
inode = shmem_get_inode(mnt->mnt_sb, NULL, S_IFREG | S_IRWXUGO, 0,
flags);
if (unlikely(!inode)) {
shmem_unacct_size(flags, size);
return ERR_PTR(-ENOSPC);
}
inode->i_flags |= i_flags;
d_instantiate(path.dentry, inode);
inode->i_size = size;
clear_nlink(inode); /* It is unlinked */
res = ERR_PTR(ramfs_nommu_expand_for_mapping(inode, size));
if (!IS_ERR(res))
res = alloc_file_pseudo(inode, mnt, name, O_RDWR,
&shmem_file_operations);
if (IS_ERR(res))
goto put_path;
res = alloc_file(&path, FMODE_WRITE | FMODE_READ,
&shmem_file_operations);
if (IS_ERR(res))
goto put_path;
return res;
put_memory:
shmem_unacct_size(flags, size);
put_path:
path_put(&path);
iput(inode);
return res;
}

29
net/socket.c
View File

@ -388,39 +388,20 @@ static struct file_system_type sock_fs_type = {
struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname)
{
struct qstr name = { .name = "" };
struct path path;
struct file *file;
if (dname) {
name.name = dname;
name.len = strlen(name.name);
} else if (sock->sk) {
name.name = sock->sk->sk_prot_creator->name;
name.len = strlen(name.name);
}
path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name);
if (unlikely(!path.dentry)) {
sock_release(sock);
return ERR_PTR(-ENOMEM);
}
path.mnt = mntget(sock_mnt);
if (!dname)
dname = sock->sk ? sock->sk->sk_prot_creator->name : "";
d_instantiate(path.dentry, SOCK_INODE(sock));
file = alloc_file(&path, FMODE_READ | FMODE_WRITE,
&socket_file_ops);
file = alloc_file_pseudo(SOCK_INODE(sock), sock_mnt, dname,
O_RDWR | (flags & O_NONBLOCK),
&socket_file_ops);
if (IS_ERR(file)) {
/* drop dentry, keep inode for a bit */
ihold(d_inode(path.dentry));
path_put(&path);
/* ... and now kill it properly */
sock_release(sock);
return file;
}
sock->file = file;
file->f_flags = O_RDWR | (flags & O_NONBLOCK);
file->private_data = sock;
return file;
}

4
security/apparmor/lsm.c
View File

@ -395,7 +395,7 @@ static int apparmor_inode_getattr(const struct path *path)
return common_perm_cond(OP_GETATTR, path, AA_MAY_GETATTR);
}
static int apparmor_file_open(struct file *file, const struct cred *cred)
static int apparmor_file_open(struct file *file)
{
struct aa_file_ctx *fctx = file_ctx(file);
struct aa_label *label;
@ -414,7 +414,7 @@ static int apparmor_file_open(struct file *file, const struct cred *cred)
return 0;
}
label = aa_get_newest_cred_label(cred);
label = aa_get_newest_cred_label(file->f_cred);
if (!unconfined(label)) {
struct inode *inode = file_inode(file);
struct path_cond cond = { inode->i_uid, inode->i_mode };

4
security/integrity/ima/ima.h
View File

@ -238,7 +238,7 @@ int ima_appraise_measurement(enum ima_hooks func,
struct integrity_iint_cache *iint,
struct file *file, const unsigned char *filename,
struct evm_ima_xattr_data *xattr_value,
int xattr_len, int opened);
int xattr_len);
int ima_must_appraise(struct inode *inode, int mask, enum ima_hooks func);
void ima_update_xattr(struct integrity_iint_cache *iint, struct file *file);
enum integrity_status ima_get_cache_status(struct integrity_iint_cache *iint,
@ -254,7 +254,7 @@ static inline int ima_appraise_measurement(enum ima_hooks func,
struct file *file,
const unsigned char *filename,
struct evm_ima_xattr_data *xattr_value,
int xattr_len, int opened)
int xattr_len)
{
return INTEGRITY_UNKNOWN;
}

4
security/integrity/ima/ima_appraise.c
View File

@ -212,7 +212,7 @@ int ima_appraise_measurement(enum ima_hooks func,
struct integrity_iint_cache *iint,
struct file *file, const unsigned char *filename,
struct evm_ima_xattr_data *xattr_value,
int xattr_len, int opened)
int xattr_len)
{
static const char op[] = "appraise_data";
const char *cause = "unknown";
@ -231,7 +231,7 @@ int ima_appraise_measurement(enum ima_hooks func,
cause = iint->flags & IMA_DIGSIG_REQUIRED ?
"IMA-signature-required" : "missing-hash";
status = INTEGRITY_NOLABEL;
if (opened & FILE_CREATED)
if (file->f_mode & FMODE_CREATED)
iint->flags |= IMA_NEW_FILE;
if ((iint->flags & IMA_NEW_FILE) &&
(!(iint->flags & IMA_DIGSIG_REQUIRED) ||

16
security/integrity/ima/ima_main.c
View File

@ -168,7 +168,7 @@ void ima_file_free(struct file *file)
static int process_measurement(struct file *file, const struct cred *cred,
u32 secid, char *buf, loff_t size, int mask,
enum ima_hooks func, int opened)
enum ima_hooks func)
{
struct inode *inode = file_inode(file);
struct integrity_iint_cache *iint = NULL;
@ -294,7 +294,7 @@ static int process_measurement(struct file *file, const struct cred *cred,
if (rc == 0 && (action & IMA_APPRAISE_SUBMASK)) {
inode_lock(inode);
rc = ima_appraise_measurement(func, iint, file, pathname,
xattr_value, xattr_len, opened);
xattr_value, xattr_len);
inode_unlock(inode);
}
if (action & IMA_AUDIT)
@ -338,7 +338,7 @@ int ima_file_mmap(struct file *file, unsigned long prot)
if (file && (prot & PROT_EXEC)) {
security_task_getsecid(current, &secid);
return process_measurement(file, current_cred(), secid, NULL,
0, MAY_EXEC, MMAP_CHECK, 0);
0, MAY_EXEC, MMAP_CHECK);
}
return 0;
@ -364,13 +364,13 @@ int ima_bprm_check(struct linux_binprm *bprm)
security_task_getsecid(current, &secid);
ret = process_measurement(bprm->file, current_cred(), secid, NULL, 0,
MAY_EXEC, BPRM_CHECK, 0);
MAY_EXEC, BPRM_CHECK);
if (ret)
return ret;
security_cred_getsecid(bprm->cred, &secid);
return process_measurement(bprm->file, bprm->cred, secid, NULL, 0,
MAY_EXEC, CREDS_CHECK, 0);
MAY_EXEC, CREDS_CHECK);
}
/**
@ -383,14 +383,14 @@ int ima_bprm_check(struct linux_binprm *bprm)
* On success return 0. On integrity appraisal error, assuming the file
* is in policy and IMA-appraisal is in enforcing mode, return -EACCES.
*/
int ima_file_check(struct file *file, int mask, int opened)
int ima_file_check(struct file *file, int mask)
{
u32 secid;
security_task_getsecid(current, &secid);
return process_measurement(file, current_cred(), secid, NULL, 0,
mask & (MAY_READ | MAY_WRITE | MAY_EXEC |
MAY_APPEND), FILE_CHECK, opened);
MAY_APPEND), FILE_CHECK);
}
EXPORT_SYMBOL_GPL(ima_file_check);
@ -493,7 +493,7 @@ int ima_post_read_file(struct file *file, void *buf, loff_t size,
func = read_idmap[read_id] ?: FILE_CHECK;
security_task_getsecid(current, &secid);
return process_measurement(file, current_cred(), secid, buf, size,
MAY_READ, func, 0);
MAY_READ, func);
}
static int __init init_ima(void)

4
security/security.c
View File

@ -970,11 +970,11 @@ int security_file_receive(struct file *file)
return call_int_hook(file_receive, 0, file);
}
int security_file_open(struct file *file, const struct cred *cred)
int security_file_open(struct file *file)
{
int ret;
ret = call_int_hook(file_open, 0, file, cred);
ret = call_int_hook(file_open, 0, file);
if (ret)
return ret;

4
security/selinux/hooks.c
View File

@ -3862,7 +3862,7 @@ static int selinux_file_receive(struct file *file)
return file_has_perm(cred, file, file_to_av(file));
}
static int selinux_file_open(struct file *file, const struct cred *cred)
static int selinux_file_open(struct file *file)
{
struct file_security_struct *fsec;
struct inode_security_struct *isec;
@ -3886,7 +3886,7 @@ static int selinux_file_open(struct file *file, const struct cred *cred)
* new inode label or new policy.
* This check is not redundant - do not remove.
*/
return file_path_has_perm(cred, file, open_file_to_av(file));
return file_path_has_perm(file->f_cred, file, open_file_to_av(file));
}
/* task security operations */

6
security/smack/smack_lsm.c
View File

@ -1927,9 +1927,9 @@ static int smack_file_receive(struct file *file)
*
* Returns 0
*/
static int smack_file_open(struct file *file, const struct cred *cred)
static int smack_file_open(struct file *file)
{
struct task_smack *tsp = cred->security;
struct task_smack *tsp = file->f_cred->security;
struct inode *inode = file_inode(file);
struct smk_audit_info ad;
int rc;
@ -1937,7 +1937,7 @@ static int smack_file_open(struct file *file, const struct cred *cred)
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_PATH);
smk_ad_setfield_u_fs_path(&ad, file->f_path);
rc = smk_tskacc(tsp, smk_of_inode(inode), MAY_READ, &ad);
rc = smk_bu_credfile(cred, file, MAY_READ, rc);
rc = smk_bu_credfile(file->f_cred, file, MAY_READ, rc);
return rc;
}

2
security/tomoyo/tomoyo.c
View File

@ -320,7 +320,7 @@ static int tomoyo_file_fcntl(struct file *file, unsigned int cmd,
*
* Returns 0 on success, negative value otherwise.
*/
static int tomoyo_file_open(struct file *f, const struct cred *cred)
static int tomoyo_file_open(struct file *f)
{
int flags = f->f_flags;
/* Don't check read permission here if called from do_execve(). */