diff options
45 files changed, 371 insertions, 576 deletions
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking index 37bf0a9de75c..7cca82ed2ed1 100644 --- a/Documentation/filesystems/Locking +++ b/Documentation/filesystems/Locking @@ -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: diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting index 17bb4dc28fae..7b7b845c490a 100644 --- a/Documentation/filesystems/porting +++ b/Documentation/filesystems/porting @@ -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(). diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt index f608180ad59d..85907d5b9c2c 100644 --- a/Documentation/filesystems/vfs.txt +++ b/Documentation/filesystems/vfs.txt @@ -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. diff --git a/drivers/gpu/drm/drm_lease.c b/drivers/gpu/drm/drm_lease.c index d638c0fb3418..b54fb78a283c 100644 --- a/drivers/gpu/drm/drm_lease.c +++ b/drivers/gpu/drm/drm_lease.c @@ -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; diff --git a/drivers/misc/cxl/api.c b/drivers/misc/cxl/api.c index 6b16946f9b05..8fd5ec4d6042 100644 --- a/drivers/misc/cxl/api.c +++ b/drivers/misc/cxl/api.c @@ -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; diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi/cxlflash/ocxl_hw.c index 497a68389461..a43d44e7e7dd 100644 --- a/drivers/scsi/cxlflash/ocxl_hw.c +++ b/drivers/scsi/cxlflash/ocxl_hw.c @@ -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; diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index 42e102e2e74a..85ff859d3af5 100644 --- a/fs/9p/vfs_inode.c +++ b/fs/9p/vfs_inode.c @@ -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; diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c index 7f6ae21a27b3..4823e1c46999 100644 --- a/fs/9p/vfs_inode_dotl.c +++ b/fs/9p/vfs_inode_dotl.c @@ -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); @@ -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)) diff --git a/fs/anon_inodes.c b/fs/anon_inodes.c index 3168ee4e77f4..91262c34b797 100644 --- a/fs/anon_inodes.c +++ b/fs/anon_inodes.c @@ -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)) @@ -82,39 +80,23 @@ struct file *anon_inode_getfile(const char *name, 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; } diff --git a/fs/bad_inode.c b/fs/bad_inode.c index 125e8bbd22a2..8035d2a44561 100644 --- a/fs/bad_inode.c +++ b/fs/bad_inode.c @@ -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; } diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c index 4b5fff31ef27..aa4a7a23ff99 100644 --- a/fs/binfmt_misc.c +++ b/fs/binfmt_misc.c @@ -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 { diff --git a/fs/ceph/file.c b/fs/ceph/file.c index ad0bed99b1d5..e2679e8a2535 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -429,8 +429,7 @@ out: * 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) diff --git a/fs/ceph/super.h b/fs/ceph/super.h index a7077a0c989f..971328b99ede 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -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); diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h index 5f0231803431..f3a78efc3109 100644 --- a/fs/cifs/cifsfs.h +++ b/fs/cifs/cifsfs.h @@ -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); diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c index ddae52bd1993..3713d22b95a7 100644 --- a/fs/cifs/dir.c +++ b/fs/cifs/dir.c @@ -465,8 +465,7 @@ out_err: 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); diff --git a/fs/file_table.c b/fs/file_table.c index 7ec0b3e5f05d..d6eccd04d703 100644 --- a/fs/file_table.c +++ b/fs/file_table.c @@ -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 @@ over: * 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, diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 56231b31f806..c979329311c8 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -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 @@ 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 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; diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c index feda55f67050..648f0ca1ad57 100644 --- a/fs/gfs2/inode.c +++ b/fs/gfs2/inode.c @@ -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 @@ fail: 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 @@ skip_lookup: 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); } /* diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index 40d4c66c7751..346a146c7617 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -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 */ - - return file; + 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; -out_inode: iput(inode); -out_dentry: - path_put(&path); -out_shm_unlock: +out: if (*user) { user_shm_unlock(size, *user); *user = NULL; diff --git a/fs/internal.h b/fs/internal.h index 5645b4ebf494..52a346903748 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -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 diff --git a/fs/namei.c b/fs/namei.c index 734cef54fdf8..278e494bcbd2 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -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 @@ OK: } } +/* 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. - * - * Returns 0 if the file was successfully atomically created (if necessary) and - * opened. In this case the file will be returned attached to @file. + * Must be called with parent locked (exclusive in O_CREAT case). * - * 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. + * 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. * - * 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 @@ no_open: /* 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 @@ no_open: out_no_open: path->dentry = dentry; path->mnt = nd->path.mnt; - return 1; + return 0; out_dput: dput(dentry); @@ -3241,8 +3214,7 @@ out_dput: * 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 @@ finish_open_created: 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, diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 7a9c14426855..f447b1a24350 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -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 @@ out: 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: diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index 137e18abb7e7..51beb6e38c90 100644 --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h @@ -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; diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index f6c4ccd693f4..b790976d3913 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -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; diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index b0555d7d8200..55a099e47ba2 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -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; diff --git a/fs/open.c b/fs/open.c index d0e955b558ad..d98e19239bb7 100644 --- a/fs/open.c +++ b/fs/open.c @@ -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 @@ cleanup_file: * 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; diff --git a/fs/pipe.c b/fs/pipe.c index 39d6f431da83..bdc5d3c0977d 100644 --- a/fs/pipe.c +++ b/fs/pipe.c @@ -741,54 +741,33 @@ fail_inode: 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) diff --git a/include/linux/file.h b/include/linux/file.h index 279720db984a..6b2fb032416c 100644 --- a/include/linux/file.h +++ b/include/linux/file.h @@ -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); diff --git a/include/linux/fs.h b/include/linux/fs.h index 805bf22898cf..7899737a9a3e 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -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 */ diff --git a/include/linux/ima.h b/include/linux/ima.h index 0e4647e0eb60..d9ba3fc363b7 100644 --- a/include/linux/ima.h +++ b/include/linux/ima.h @@ -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; } diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h index 8f1131c8dd54..a8ee106b865d 100644 --- a/include/linux/lsm_hooks.h +++ b/include/linux/lsm_hooks.h @@ -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); diff --git a/include/linux/security.h b/include/linux/security.h index 63030c85ee19..88d30fc975e7 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -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; } diff --git a/ipc/shm.c b/ipc/shm.c index fefa00d310fb..d8a38b3be5dd 100644 --- a/ipc/shm.c +++ b/ipc/shm.c @@ -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; @@ -1447,46 +1446,44 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, goto out_unlock; } - path = shp->shm_file->f_path; - path_get(&path); + /* + * 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 + * file extends beyond that of the shm segment. It's not usually + * possible, but it can happen during remap_file_pages() emulation as + * that unmaps the memory, then does ->mmap() via file reference only. + * 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. + */ + base = get_file(shp->shm_file); shp->shm_nattch++; - size = i_size_read(d_inode(path.dentry)); + 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) { - path_put(&path); + fput(base); goto out_nattch; } - file = alloc_file(&path, f_mode, - is_file_hugepages(shp->shm_file) ? + 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); - path_put(&path); + fput(base); 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 - * file extends beyond that of the shm segment. It's not usually - * possible, but it can happen during remap_file_pages() emulation as - * that unmaps the memory, then does ->mmap() via file reference only. - * 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); + sfd->file = base; sfd->vm_ops = NULL; + file->private_data = sfd; err = security_mmap_file(file, prot, flags); if (err) diff --git a/mm/memfd.c b/mm/memfd.c index 27069518e3c5..2bb5e257080e 100644 --- a/mm/memfd.c +++ b/mm/memfd.c @@ -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); diff --git a/mm/shmem.c b/mm/shmem.c index 41b9bbf24e16..96bcc51fb9ec 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -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; } diff --git a/net/socket.c b/net/socket.c index 8c24d5dc4bc8..792f0313ea91 100644 --- a/net/socket.c +++ b/net/socket.c @@ -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); - - d_instantiate(path.dentry, SOCK_INODE(sock)); + if (!dname) + dname = sock->sk ? sock->sk->sk_prot_creator->name : ""; - 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; } diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c index 74f17376202b..8b8b70620bbe 100644 --- a/security/apparmor/lsm.c +++ b/security/apparmor/lsm.c @@ -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 }; diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h index 354bb5716ce3..e4c1a236976c 100644 --- a/security/integrity/ima/ima.h +++ b/security/integrity/ima/ima.h @@ -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; } diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c index 8bd7a0733e51..deec1804a00a 100644 --- a/security/integrity/ima/ima_appraise.c +++ b/security/integrity/ima/ima_appraise.c @@ -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) || diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c index dca44cf7838e..b286f37712d5 100644 --- a/security/integrity/ima/ima_main.c +++ b/security/integrity/ima/ima_main.c @@ -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) diff --git a/security/security.c b/security/security.c index 68f46d849abe..5dce67070cdf 100644 --- a/security/security.c +++ b/security/security.c @@ -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; diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 2b5ee5fbd652..18006be15713 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -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 */ diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index 19de675d4504..9ab8097dab7c 100644 --- a/security/smack/smack_lsm.c +++ b/security/smack/smack_lsm.c @@ -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; } diff --git a/security/tomoyo/tomoyo.c b/security/tomoyo/tomoyo.c index 213b8c593668..9f932e2d6852 100644 --- a/security/tomoyo/tomoyo.c +++ b/security/tomoyo/tomoyo.c @@ -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(). */ |