diff options
Diffstat (limited to 'fs/kernfs')
| -rw-r--r-- | fs/kernfs/dir.c | 9 | ||||
| -rw-r--r-- | fs/kernfs/file.c | 28 | ||||
| -rw-r--r-- | fs/kernfs/inode.c | 159 | ||||
| -rw-r--r-- | fs/kernfs/kernfs-internal.h | 7 | ||||
| -rw-r--r-- | fs/kernfs/mount.c | 1 | ||||
| -rw-r--r-- | fs/kernfs/symlink.c | 3 |
6 files changed, 111 insertions, 96 deletions
diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c index 6e7fd37615f8..cf4c636ff4da 100644 --- a/fs/kernfs/dir.c +++ b/fs/kernfs/dir.c @@ -1046,13 +1046,17 @@ static int kernfs_iop_rmdir(struct inode *dir, struct dentry *dentry) } static int kernfs_iop_rename(struct inode *old_dir, struct dentry *old_dentry, - struct inode *new_dir, struct dentry *new_dentry) + struct inode *new_dir, struct dentry *new_dentry, + unsigned int flags) { struct kernfs_node *kn = old_dentry->d_fsdata; struct kernfs_node *new_parent = new_dir->i_private; struct kernfs_syscall_ops *scops = kernfs_root(kn)->syscall_ops; int ret; + if (flags) + return -EINVAL; + if (!scops || !scops->rename) return -EPERM; @@ -1076,9 +1080,6 @@ const struct inode_operations kernfs_dir_iops = { .permission = kernfs_iop_permission, .setattr = kernfs_iop_setattr, .getattr = kernfs_iop_getattr, - .setxattr = kernfs_iop_setxattr, - .removexattr = kernfs_iop_removexattr, - .getxattr = kernfs_iop_getxattr, .listxattr = kernfs_iop_listxattr, .mkdir = kernfs_iop_mkdir, diff --git a/fs/kernfs/file.c b/fs/kernfs/file.c index e1574008adc9..2bcb86e6e6ca 100644 --- a/fs/kernfs/file.c +++ b/fs/kernfs/file.c @@ -840,21 +840,35 @@ repeat: mutex_lock(&kernfs_mutex); list_for_each_entry(info, &kernfs_root(kn)->supers, node) { + struct kernfs_node *parent; struct inode *inode; - struct dentry *dentry; + /* + * We want fsnotify_modify() on @kn but as the + * modifications aren't originating from userland don't + * have the matching @file available. Look up the inodes + * and generate the events manually. + */ inode = ilookup(info->sb, kn->ino); if (!inode) continue; - dentry = d_find_any_alias(inode); - if (dentry) { - fsnotify_parent(NULL, dentry, FS_MODIFY); - fsnotify(inode, FS_MODIFY, inode, FSNOTIFY_EVENT_INODE, - NULL, 0); - dput(dentry); + parent = kernfs_get_parent(kn); + if (parent) { + struct inode *p_inode; + + p_inode = ilookup(info->sb, parent->ino); + if (p_inode) { + fsnotify(p_inode, FS_MODIFY | FS_EVENT_ON_CHILD, + inode, FSNOTIFY_EVENT_INODE, kn->name, 0); + iput(p_inode); + } + + kernfs_put(parent); } + fsnotify(inode, FS_MODIFY, inode, FSNOTIFY_EVENT_INODE, + kn->name, 0); iput(inode); } diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c index 63b925d5ba1e..a1982118f92f 100644 --- a/fs/kernfs/inode.c +++ b/fs/kernfs/inode.c @@ -28,9 +28,6 @@ static const struct inode_operations kernfs_iops = { .permission = kernfs_iop_permission, .setattr = kernfs_iop_setattr, .getattr = kernfs_iop_getattr, - .setxattr = kernfs_iop_setxattr, - .removexattr = kernfs_iop_removexattr, - .getxattr = kernfs_iop_getxattr, .listxattr = kernfs_iop_listxattr, }; @@ -122,7 +119,7 @@ int kernfs_iop_setattr(struct dentry *dentry, struct iattr *iattr) return -EINVAL; mutex_lock(&kernfs_mutex); - error = inode_change_ok(inode, iattr); + error = setattr_prepare(dentry, iattr); if (error) goto out; @@ -138,17 +135,12 @@ out: return error; } -static int kernfs_node_setsecdata(struct kernfs_node *kn, void **secdata, +static int kernfs_node_setsecdata(struct kernfs_iattrs *attrs, void **secdata, u32 *secdata_len) { - struct kernfs_iattrs *attrs; void *old_secdata; size_t old_secdata_len; - attrs = kernfs_iattrs(kn); - if (!attrs) - return -ENOMEM; - old_secdata = attrs->ia_secdata; old_secdata_len = attrs->ia_secdata_len; @@ -160,71 +152,6 @@ static int kernfs_node_setsecdata(struct kernfs_node *kn, void **secdata, return 0; } -int kernfs_iop_setxattr(struct dentry *unused, struct inode *inode, - const char *name, const void *value, - size_t size, int flags) -{ - struct kernfs_node *kn = inode->i_private; - struct kernfs_iattrs *attrs; - void *secdata; - int error; - u32 secdata_len = 0; - - attrs = kernfs_iattrs(kn); - if (!attrs) - return -ENOMEM; - - if (!strncmp(name, XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN)) { - const char *suffix = name + XATTR_SECURITY_PREFIX_LEN; - error = security_inode_setsecurity(inode, suffix, - value, size, flags); - if (error) - return error; - error = security_inode_getsecctx(inode, - &secdata, &secdata_len); - if (error) - return error; - - mutex_lock(&kernfs_mutex); - error = kernfs_node_setsecdata(kn, &secdata, &secdata_len); - mutex_unlock(&kernfs_mutex); - - if (secdata) - security_release_secctx(secdata, secdata_len); - return error; - } else if (!strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN)) { - return simple_xattr_set(&attrs->xattrs, name, value, size, - flags); - } - - return -EINVAL; -} - -int kernfs_iop_removexattr(struct dentry *dentry, const char *name) -{ - struct kernfs_node *kn = dentry->d_fsdata; - struct kernfs_iattrs *attrs; - - attrs = kernfs_iattrs(kn); - if (!attrs) - return -ENOMEM; - - return simple_xattr_set(&attrs->xattrs, name, NULL, 0, XATTR_REPLACE); -} - -ssize_t kernfs_iop_getxattr(struct dentry *unused, struct inode *inode, - const char *name, void *buf, size_t size) -{ - struct kernfs_node *kn = inode->i_private; - struct kernfs_iattrs *attrs; - - attrs = kernfs_iattrs(kn); - if (!attrs) - return -ENOMEM; - - return simple_xattr_get(&attrs->xattrs, name, buf, size); -} - ssize_t kernfs_iop_listxattr(struct dentry *dentry, char *buf, size_t size) { struct kernfs_node *kn = dentry->d_fsdata; @@ -241,7 +168,7 @@ static inline void set_default_inode_attr(struct inode *inode, umode_t mode) { inode->i_mode = mode; inode->i_atime = inode->i_mtime = - inode->i_ctime = current_fs_time(inode->i_sb); + inode->i_ctime = current_time(inode); } static inline void set_inode_attr(struct inode *inode, struct iattr *iattr) @@ -376,3 +303,83 @@ int kernfs_iop_permission(struct inode *inode, int mask) return generic_permission(inode, mask); } + +static int kernfs_xattr_get(const struct xattr_handler *handler, + struct dentry *unused, struct inode *inode, + const char *suffix, void *value, size_t size) +{ + const char *name = xattr_full_name(handler, suffix); + struct kernfs_node *kn = inode->i_private; + struct kernfs_iattrs *attrs; + + attrs = kernfs_iattrs(kn); + if (!attrs) + return -ENOMEM; + + return simple_xattr_get(&attrs->xattrs, name, value, size); +} + +static int kernfs_xattr_set(const struct xattr_handler *handler, + struct dentry *unused, struct inode *inode, + const char *suffix, const void *value, + size_t size, int flags) +{ + const char *name = xattr_full_name(handler, suffix); + struct kernfs_node *kn = inode->i_private; + struct kernfs_iattrs *attrs; + + attrs = kernfs_iattrs(kn); + if (!attrs) + return -ENOMEM; + + return simple_xattr_set(&attrs->xattrs, name, value, size, flags); +} + +const struct xattr_handler kernfs_trusted_xattr_handler = { + .prefix = XATTR_TRUSTED_PREFIX, + .get = kernfs_xattr_get, + .set = kernfs_xattr_set, +}; + +static int kernfs_security_xattr_set(const struct xattr_handler *handler, + struct dentry *unused, struct inode *inode, + const char *suffix, const void *value, + size_t size, int flags) +{ + struct kernfs_node *kn = inode->i_private; + struct kernfs_iattrs *attrs; + void *secdata; + u32 secdata_len = 0; + int error; + + attrs = kernfs_iattrs(kn); + if (!attrs) + return -ENOMEM; + + error = security_inode_setsecurity(inode, suffix, value, size, flags); + if (error) + return error; + error = security_inode_getsecctx(inode, &secdata, &secdata_len); + if (error) + return error; + + mutex_lock(&kernfs_mutex); + error = kernfs_node_setsecdata(attrs, &secdata, &secdata_len); + mutex_unlock(&kernfs_mutex); + + if (secdata) + security_release_secctx(secdata, secdata_len); + return error; +} + +const struct xattr_handler kernfs_security_xattr_handler = { + .prefix = XATTR_SECURITY_PREFIX, + .get = kernfs_xattr_get, + .set = kernfs_security_xattr_set, +}; + +const struct xattr_handler *kernfs_xattr_handlers[] = { + &kernfs_trusted_xattr_handler, + &kernfs_security_xattr_handler, + NULL +}; diff --git a/fs/kernfs/kernfs-internal.h b/fs/kernfs/kernfs-internal.h index 37159235ac10..bfd551bbf231 100644 --- a/fs/kernfs/kernfs-internal.h +++ b/fs/kernfs/kernfs-internal.h @@ -76,17 +76,12 @@ extern struct kmem_cache *kernfs_node_cache; /* * inode.c */ +extern const struct xattr_handler *kernfs_xattr_handlers[]; void kernfs_evict_inode(struct inode *inode); int kernfs_iop_permission(struct inode *inode, int mask); int kernfs_iop_setattr(struct dentry *dentry, struct iattr *iattr); int kernfs_iop_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat); -int kernfs_iop_setxattr(struct dentry *dentry, struct inode *inode, - const char *name, const void *value, - size_t size, int flags); -int kernfs_iop_removexattr(struct dentry *dentry, const char *name); -ssize_t kernfs_iop_getxattr(struct dentry *dentry, struct inode *inode, - const char *name, void *buf, size_t size); ssize_t kernfs_iop_listxattr(struct dentry *dentry, char *buf, size_t size); /* diff --git a/fs/kernfs/mount.c b/fs/kernfs/mount.c index b3d73ad52b22..d5b149a45be1 100644 --- a/fs/kernfs/mount.c +++ b/fs/kernfs/mount.c @@ -158,6 +158,7 @@ static int kernfs_fill_super(struct super_block *sb, unsigned long magic) sb->s_blocksize_bits = PAGE_SHIFT; sb->s_magic = magic; sb->s_op = &kernfs_sops; + sb->s_xattr = kernfs_xattr_handlers; sb->s_time_gran = 1; /* get root inode, initialize and unlock it */ diff --git a/fs/kernfs/symlink.c b/fs/kernfs/symlink.c index 117b8b3416f9..9b43ca02b7ab 100644 --- a/fs/kernfs/symlink.c +++ b/fs/kernfs/symlink.c @@ -134,9 +134,6 @@ static const char *kernfs_iop_get_link(struct dentry *dentry, } const struct inode_operations kernfs_symlink_iops = { - .setxattr = kernfs_iop_setxattr, - .removexattr = kernfs_iop_removexattr, - .getxattr = kernfs_iop_getxattr, .listxattr = kernfs_iop_listxattr, .readlink = generic_readlink, .get_link = kernfs_iop_get_link, |