[v3,06/17] sockfs: Get rid of getxattr iop

Message ID	1464598653-3656-7-git-send-email-agruenba@redhat.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <linux-security-module-owner@kernel.org> From: Andreas Gruenbacher <agruenba@redhat.com> To: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Andreas Gruenbacher <agruenba@redhat.com>, linux-fsdevel@vger.kernel.org, Tyler Hicks <tyhicks@canonical.com>, ecryptfs@vger.kernel.org, Miklos Szeredi <miklos@szeredi.hu>, linux-unionfs@vger.kernel.org, Mimi Zohar <zohar@linux.vnet.ibm.com>, linux-ima-devel@lists.sourceforge.net, linux-security-module@vger.kernel.org, David Howells <dhowells@redhat.com>, Serge Hallyn <serge.hallyn@canonical.com>, Dmitry Kasatkin <dmitry.kasatkin@gmail.com>, Paul Moore <paul@paul-moore.com>, Stephen Smalley <sds@tycho.nsa.gov>, Eric Paris <eparis@parisplace.org>, Casey Schaufler <casey@schaufler-ca.com>, Oleg Drokin <oleg.drokin@intel.com>, Andreas Dilger <andreas.dilger@intel.com> Subject: [PATCH v3 06/17] sockfs: Get rid of getxattr iop Date: Mon, 30 May 2016 10:57:22 +0200 Message-Id: <1464598653-3656-7-git-send-email-agruenba@redhat.com> In-Reply-To: <1464598653-3656-1-git-send-email-agruenba@redhat.com> References: <1464598653-3656-1-git-send-email-agruenba@redhat.com> Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk

diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c index 2436ad5..4cef6a6 100644 --- a/arch/ia64/kernel/perfmon.c +++ b/arch/ia64/kernel/perfmon.c @@ -611,8 +611,8 @@ static const struct dentry_operations pfmfs_dentry_operations; static struct dentry * pfmfs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) { - return mount_pseudo(fs_type, "pfm:", NULL, &pfmfs_dentry_operations, - PFMFS_MAGIC); + return mount_pseudo(fs_type, "pfm:", NULL, NULL, + &pfmfs_dentry_operations, PFMFS_MAGIC); } static struct file_system_type pfm_fs_type = { diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index bff8922..118658a 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -511,6 +511,7 @@ static struct dentry *drm_fs_mount(struct file_system_type *fs_type, int flags, return mount_pseudo(fs_type, "drm:", &drm_fs_sops, + NULL, &drm_fs_dops, 0x010203ff); } diff --git a/fs/aio.c b/fs/aio.c index fb8e45b..5003cb8 100644 --- a/fs/aio.c +++ b/fs/aio.c @@ -239,7 +239,7 @@ static struct dentry *aio_mount(struct file_system_type *fs_type, static const struct dentry_operations ops = { .d_dname = simple_dname, }; - return mount_pseudo(fs_type, "aio:", NULL, &ops, AIO_RING_MAGIC); + return mount_pseudo(fs_type, "aio:", NULL, NULL, &ops, AIO_RING_MAGIC); } /* aio_setup diff --git a/fs/anon_inodes.c b/fs/anon_inodes.c index 80ef38c..5e1aeea1 100644 --- a/fs/anon_inodes.c +++ b/fs/anon_inodes.c @@ -41,7 +41,7 @@ static const struct dentry_operations anon_inodefs_dentry_operations = { static struct dentry *anon_inodefs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) { - return mount_pseudo(fs_type, "anon_inode:", NULL, + return mount_pseudo(fs_type, "anon_inode:", NULL, NULL, &anon_inodefs_dentry_operations, ANON_INODE_FS_MAGIC); } diff --git a/fs/block_dev.c b/fs/block_dev.c index 71ccab1..acabeaa 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -658,7 +658,7 @@ static struct dentry *bd_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) { struct dentry *dent; - dent = mount_pseudo(fs_type, "bdev:", &bdev_sops, NULL, BDEVFS_MAGIC); + dent = mount_pseudo(fs_type, "bdev:", &bdev_sops, NULL, NULL, BDEVFS_MAGIC); if (dent) dent->d_sb->s_iflags |= SB_I_CGROUPWB; return dent; diff --git a/fs/btrfs/tests/btrfs-tests.c b/fs/btrfs/tests/btrfs-tests.c index f54bf45..ebecf33 100644 --- a/fs/btrfs/tests/btrfs-tests.c +++ b/fs/btrfs/tests/btrfs-tests.c @@ -40,7 +40,7 @@ static struct dentry *btrfs_test_mount(struct file_system_type *fs_type, void *data) { return mount_pseudo(fs_type, "btrfs_test:", &btrfs_test_super_ops, - NULL, BTRFS_TEST_MAGIC); + NULL, NULL, BTRFS_TEST_MAGIC); } static struct file_system_type test_type = { diff --git a/fs/libfs.c b/fs/libfs.c index 3db2721..89341ad 100644 --- a/fs/libfs.c +++ b/fs/libfs.c @@ -206,7 +206,7 @@ static const struct super_operations simple_super_operations = { * will never be mountable) */ struct dentry *mount_pseudo(struct file_system_type *fs_type, char *name, - const struct super_operations *ops, + const struct super_operations *ops, const struct xattr_handler **xattr, const struct dentry_operations *dops, unsigned long magic) { struct super_block *s; @@ -223,6 +223,7 @@ struct dentry *mount_pseudo(struct file_system_type *fs_type, char *name, s->s_blocksize_bits = PAGE_SHIFT; s->s_magic = magic; s->s_op = ops ? ops : &simple_super_operations; + s->s_xattr = xattr; s->s_time_gran = 1; root = new_inode(s); if (!root) diff --git a/fs/nsfs.c b/fs/nsfs.c index 8f20d60..e151cc3 100644 --- a/fs/nsfs.c +++ b/fs/nsfs.c @@ -154,7 +154,7 @@ static const struct super_operations nsfs_ops = { static struct dentry *nsfs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) { - return mount_pseudo(fs_type, "nsfs:", &nsfs_ops, + return mount_pseudo(fs_type, "nsfs:", &nsfs_ops, NULL, &ns_dentry_operations, NSFS_MAGIC); } static struct file_system_type nsfs = { diff --git a/fs/pipe.c b/fs/pipe.c index 0d3f516..035fa6f 100644 --- a/fs/pipe.c +++ b/fs/pipe.c @@ -1143,7 +1143,7 @@ static const struct super_operations pipefs_ops = { static struct dentry *pipefs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) { - return mount_pseudo(fs_type, "pipe:", &pipefs_ops, + return mount_pseudo(fs_type, "pipe:", &pipefs_ops, NULL, &pipefs_dentry_operations, PIPEFS_MAGIC); } diff --git a/include/linux/fs.h b/include/linux/fs.h index dd28814..a1f69bd 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2059,6 +2059,7 @@ struct super_block *sget(struct file_system_type *type, int flags, void *data); extern struct dentry *mount_pseudo(struct file_system_type *, char *, const struct super_operations *ops, + const struct xattr_handler **xattr, const struct dentry_operations *dops, unsigned long); diff --git a/net/socket.c b/net/socket.c index 9b3dca6..be5463f 100644 --- a/net/socket.c +++ b/net/socket.c @@ -320,11 +320,38 @@ static const struct dentry_operations sockfs_dentry_operations = { .d_dname = sockfs_dname, }; +static int sockfs_xattr_get(const struct xattr_handler *handler, + struct dentry *dentry, struct inode *inode, + const char *suffix, void *value, size_t size) +{ + if (value) { + if (dentry->d_name.len + 1 > size) + return -ERANGE; + memcpy(value, dentry->d_name.name, dentry->d_name.len + 1); + } + return dentry->d_name.len + 1; +} + +#define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname" +#define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX) +#define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1) + +static const struct xattr_handler sockfs_xattr_handler = { + .name = XATTR_NAME_SOCKPROTONAME, + .get = sockfs_xattr_get, +}; + +static const struct xattr_handler *sockfs_xattr_handlers[] = { + &sockfs_xattr_handler, + NULL +}; + static struct dentry *sockfs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) { return mount_pseudo(fs_type, "socket:", &sockfs_ops, - &sockfs_dentry_operations, SOCKFS_MAGIC); + sockfs_xattr_handlers, + &sockfs_dentry_operations, SOCKFS_MAGIC); } static struct vfsmount *sock_mnt __read_mostly; @@ -463,23 +490,6 @@ static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) return NULL; } -#define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname" -#define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX) -#define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1) -static ssize_t sockfs_getxattr(struct dentry *dentry, struct inode *inode, - const char *name, void *value, size_t size) -{ - if (!strcmp(name, XATTR_NAME_SOCKPROTONAME)) { - if (value) { - if (dentry->d_name.len + 1 > size) - return -ERANGE; - memcpy(value, dentry->d_name.name, dentry->d_name.len + 1); - } - return dentry->d_name.len + 1; - } - return -EOPNOTSUPP; -} - static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer, size_t size) { @@ -509,7 +519,7 @@ static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer, } static const struct inode_operations sockfs_inode_ops = { - .getxattr = sockfs_getxattr, + .getxattr = generic_getxattr, .listxattr = sockfs_listxattr, };

[v3,06/17] sockfs: Get rid of getxattr iop

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