| Message ID | 20190527110702.3962-2-zyan@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [1/2] ceph: rename struct ceph_acls_info to ceph_acl_sec_ctx | expand |
On Mon, 2019-05-27 at 19:07 +0800, Yan, Zheng wrote: > When creating new file/directory, uses dentry_init_security() to prepare > selinux context for the new inode, then sends openc/mkdir request to MDS, > together with selinux xattr. > > Signed-off-by: "Yan, Zheng" <zyan@redhat.com> You should probably cc linux-security-module@vger.kernel.org. > --- > fs/ceph/Kconfig | 12 +++++ > fs/ceph/caps.c | 1 + > fs/ceph/dir.c | 12 +++++ > fs/ceph/file.c | 3 ++ > fs/ceph/inode.c | 1 + > fs/ceph/super.h | 19 +++++++ > fs/ceph/xattr.c | 141 ++++++++++++++++++++++++++++++++++++++++++------ > 7 files changed, 172 insertions(+), 17 deletions(-) > > diff --git a/fs/ceph/Kconfig b/fs/ceph/Kconfig > index 52095f473464..5a665c126a7c 100644 > --- a/fs/ceph/Kconfig > +++ b/fs/ceph/Kconfig > @@ -35,3 +35,15 @@ config CEPH_FS_POSIX_ACL > groups beyond the owner/group/world scheme. > > If you don't know what Access Control Lists are, say N > + > +config CEPH_FS_SECURITY_LABEL > + bool "CephFS Security Labels" > + depends on CEPH_FS && SECURITY > + help > + Security labels support alternative access control models > + implemented by security modules like SELinux. This option > + enables an extended attribute handler for file security > + labels in the Ceph filesystem. > + > + If you are not using a security module that requires using > + extended attributes for file security labels, say N. > diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c > index 7754d7679122..50409d9fdc90 100644 > --- a/fs/ceph/caps.c > +++ b/fs/ceph/caps.c > @@ -3156,6 +3156,7 @@ static void handle_cap_grant(struct inode *inode, > ci->i_xattrs.blob = ceph_buffer_get(xattr_buf); > ci->i_xattrs.version = version; > ceph_forget_all_cached_acls(inode); > + ceph_security_invalidate_secctx(inode); > } > } > > diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c > index 14d795e5fa73..b282d076dc9e 100644 > --- a/fs/ceph/dir.c > +++ b/fs/ceph/dir.c > @@ -839,6 +839,9 @@ static int ceph_mknod(struct inode *dir, struct dentry *dentry, > err = ceph_pre_init_acls(dir, &mode, &as_ctx); > if (err < 0) > goto out; > + err = ceph_security_init_secctx(dentry, mode, &as_ctx); > + if (err < 0) > + goto out; > > dout("mknod in dir %p dentry %p mode 0%ho rdev %d\n", > dir, dentry, mode, rdev); > @@ -884,6 +887,7 @@ static int ceph_symlink(struct inode *dir, struct dentry *dentry, > struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); > struct ceph_mds_client *mdsc = fsc->mdsc; > struct ceph_mds_request *req; > + struct ceph_acl_sec_ctx as_ctx = {}; > int err; > > if (ceph_snap(dir) != CEPH_NOSNAP) > @@ -894,6 +898,10 @@ static int ceph_symlink(struct inode *dir, struct dentry *dentry, > goto out; > } > > + err = ceph_security_init_secctx(dentry, S_IFLNK | S_IRWXUGO, &as_ctx); > + if (err < 0) > + goto out; > + > dout("symlink in dir %p dentry %p to '%s'\n", dir, dentry, dest); > req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SYMLINK, USE_AUTH_MDS); > if (IS_ERR(req)) { > @@ -919,6 +927,7 @@ static int ceph_symlink(struct inode *dir, struct dentry *dentry, > out: > if (err) > d_drop(dentry); > + ceph_release_acl_sec_ctx(&as_ctx); > return err; > } > > @@ -953,6 +962,9 @@ static int ceph_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) > err = ceph_pre_init_acls(dir, &mode, &as_ctx); > if (err < 0) > goto out; > + err = ceph_security_init_secctx(dentry, mode, &as_ctx); > + if (err < 0) > + goto out; > > req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); > if (IS_ERR(req)) { > diff --git a/fs/ceph/file.c b/fs/ceph/file.c > index 5975345753d7..a7080783fe20 100644 > --- a/fs/ceph/file.c > +++ b/fs/ceph/file.c > @@ -453,6 +453,9 @@ int ceph_atomic_open(struct inode *dir, struct dentry *dentry, > err = ceph_pre_init_acls(dir, &mode, &as_ctx); > if (err < 0) > return err; > + err = ceph_security_init_secctx(dentry, mode, &as_ctx); > + if (err < 0) > + goto out_ctx; > } > > /* do the open */ > diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c > index 30d0cdc21035..125ac54b5841 100644 > --- a/fs/ceph/inode.c > +++ b/fs/ceph/inode.c > @@ -891,6 +891,7 @@ static int fill_inode(struct inode *inode, struct page *locked_page, > iinfo->xattr_data, iinfo->xattr_len); > ci->i_xattrs.version = le64_to_cpu(info->xattr_version); > ceph_forget_all_cached_acls(inode); > + ceph_security_invalidate_secctx(inode); > xattr_blob = NULL; > } > > diff --git a/fs/ceph/super.h b/fs/ceph/super.h > index d7520ccf27e9..9c82d213a5ab 100644 > --- a/fs/ceph/super.h > +++ b/fs/ceph/super.h > @@ -932,6 +932,10 @@ struct ceph_acl_sec_ctx { > #ifdef CONFIG_CEPH_FS_POSIX_ACL > void *default_acl; > void *acl; > +#endif > +#ifdef CONFIG_CEPH_FS_SECURITY_LABEL > + void *sec_ctx; > + u32 sec_ctxlen; > #endif > struct ceph_pagelist *pagelist; > }; > @@ -950,6 +954,21 @@ static inline bool ceph_security_xattr_wanted(struct inode *in) > } > #endif > > +#ifdef CONFIG_CEPH_FS_SECURITY_LABEL > +extern int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, > + struct ceph_acl_sec_ctx *ctx); > +extern void ceph_security_invalidate_secctx(struct inode *inode); > +#else > +static inline int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, > + struct ceph_acl_sec_ctx *ctx) > +{ > + return 0; > +} > +static inline void ceph_security_invalidate_secctx(struct inode *inode) > +{ > +} > +#endif > + > void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx); > > /* acl.c */ > diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c > index 518a5beed58c..fea70696f375 100644 > --- a/fs/ceph/xattr.c > +++ b/fs/ceph/xattr.c > @@ -8,6 +8,7 @@ > #include <linux/ceph/decode.h> > > #include <linux/xattr.h> > +#include <linux/security.h> > #include <linux/posix_acl_xattr.h> > #include <linux/slab.h> > > @@ -17,26 +18,9 @@ > static int __remove_xattr(struct ceph_inode_info *ci, > struct ceph_inode_xattr *xattr); > > -static const struct xattr_handler ceph_other_xattr_handler; > - > -/* > - * List of handlers for synthetic system.* attributes. Other > - * attributes are handled directly. > - */ > -const struct xattr_handler *ceph_xattr_handlers[] = { > -#ifdef CONFIG_CEPH_FS_POSIX_ACL > - &posix_acl_access_xattr_handler, > - &posix_acl_default_xattr_handler, > -#endif > - &ceph_other_xattr_handler, > - NULL, > -}; > - > static bool ceph_is_valid_xattr(const char *name) > { > return !strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN) || > - !strncmp(name, XATTR_SECURITY_PREFIX, > - XATTR_SECURITY_PREFIX_LEN) || > !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) || > !strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); > } > @@ -1196,6 +1180,110 @@ bool ceph_security_xattr_deadlock(struct inode *in) > spin_unlock(&ci->i_ceph_lock); > return ret; > } > + > +#ifdef CONFIG_CEPH_FS_SECURITY_LABEL > +int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, > + struct ceph_acl_sec_ctx *as_ctx) > +{ > + struct ceph_pagelist *pagelist = as_ctx->pagelist; > + const char *name; > + size_t name_len; > + int err; > + > + err = security_dentry_init_security(dentry, mode, &dentry->d_name, > + &as_ctx->sec_ctx, > + &as_ctx->sec_ctxlen); > + if (err < 0) { > + err = 0; /* do nothing */ > + goto out; > + } > + ^^^ Should we WARN_ONCE if the above happens? > + err = -ENOMEM; > + if (!pagelist) { > + pagelist = ceph_pagelist_alloc(GFP_KERNEL); > + if (!pagelist) > + goto out; > + err = ceph_pagelist_reserve(pagelist, PAGE_SIZE); > + if (err) > + goto out; > + ceph_pagelist_encode_32(pagelist, 1); > + } > + > + /* > + * FIXME: Make security_dentry_init_security() generic. Currently > + * It only supports single security module and only selinux has > + * dentry_init_security hook. > + */ > + name = XATTR_NAME_SELINUX; > + name_len = strlen(name); Yuck, but it seems like a reasonable hack for now. I'm not sure what else we could reasonably do here. We definitely want to send the info alongside the initial create request. > + err = ceph_pagelist_reserve(pagelist, > + 4 * 2 + name_len + as_ctx->sec_ctxlen); > + if (err) > + goto out; > + > + if (as_ctx->pagelist) { > + /* update count of KV pairs */ > + BUG_ON(pagelist->length <= sizeof(__le32)); > + if (list_is_singular(&pagelist->head)) { > + le32_add_cpu((__le32*)pagelist->mapped_tail, 1); > + } else { > + struct page *page = list_first_entry(&pagelist->head, > + struct page, lru); > + void *addr = kmap_atomic(page); > + le32_add_cpu((__le32*)addr, 1); > + kunmap_atomic(addr); > + } > + } else { > + as_ctx->pagelist = pagelist; > + } > + > + ceph_pagelist_encode_32(pagelist, name_len); > + ceph_pagelist_append(pagelist, name, name_len); > + > + ceph_pagelist_encode_32(pagelist, as_ctx->sec_ctxlen); > + ceph_pagelist_append(pagelist, as_ctx->sec_ctx, as_ctx->sec_ctxlen); > + > + err = 0; > +out: > + if (pagelist && !as_ctx->pagelist) > + ceph_pagelist_release(pagelist); > + return err; > +} > + > +void ceph_security_invalidate_secctx(struct inode *inode) > +{ > + security_inode_invalidate_secctx(inode); > +} > + > +static int ceph_xattr_set_security_label(const struct xattr_handler *handler, > + struct dentry *unused, struct inode *inode, > + const char *key, const void *buf, > + size_t buflen, int flags) > +{ > + if (security_ismaclabel(key)) { > + const char *name = xattr_full_name(handler, key); > + return __ceph_setxattr(inode, name, buf, buflen, flags); > + } > + return -EOPNOTSUPP; > +} > + > +static int ceph_xattr_get_security_label(const struct xattr_handler *handler, > + struct dentry *unused, struct inode *inode, > + const char *key, void *buf, size_t buflen) > +{ > + if (security_ismaclabel(key)) { nit: whitespace damage above > + const char *name = xattr_full_name(handler, key); > + return __ceph_getxattr(inode, name, buf, buflen); > + } > + return -EOPNOTSUPP; > +} > + > +static const struct xattr_handler ceph_security_label_handler = { > + .prefix = XATTR_SECURITY_PREFIX, > + .get = ceph_xattr_get_security_label, > + .set = ceph_xattr_set_security_label, > +}; > +#endif > #endif > > void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx) > @@ -1203,7 +1291,26 @@ void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx) > #ifdef CONFIG_CEPH_FS_POSIX_ACL > posix_acl_release(as_ctx->acl); > posix_acl_release(as_ctx->default_acl); > +#endif > +#ifdef CONFIG_CEPH_FS_SECURITY_LABEL > + security_release_secctx(as_ctx->sec_ctx, as_ctx->sec_ctxlen); > #endif > if (as_ctx->pagelist) > ceph_pagelist_release(as_ctx->pagelist); > } > + > +/* > + * List of handlers for synthetic system.* attributes. Other > + * attributes are handled directly. > + */ > +const struct xattr_handler *ceph_xattr_handlers[] = { > +#ifdef CONFIG_CEPH_FS_POSIX_ACL > + &posix_acl_access_xattr_handler, > + &posix_acl_default_xattr_handler, > +#endif > +#ifdef CONFIG_CEPH_FS_SECURITY_LABEL > + &ceph_security_label_handler, > +#endif > + &ceph_other_xattr_handler, > + NULL, > +}; Aside from minor nits above: Reviewed-by: Jeff Layton <jlayton@redhat.com>
diff --git a/fs/ceph/Kconfig b/fs/ceph/Kconfig index 52095f473464..5a665c126a7c 100644 --- a/fs/ceph/Kconfig +++ b/fs/ceph/Kconfig @@ -35,3 +35,15 @@ config CEPH_FS_POSIX_ACL groups beyond the owner/group/world scheme. If you don't know what Access Control Lists are, say N + +config CEPH_FS_SECURITY_LABEL + bool "CephFS Security Labels" + depends on CEPH_FS && SECURITY + help + Security labels support alternative access control models + implemented by security modules like SELinux. This option + enables an extended attribute handler for file security + labels in the Ceph filesystem. + + If you are not using a security module that requires using + extended attributes for file security labels, say N. diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index 7754d7679122..50409d9fdc90 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -3156,6 +3156,7 @@ static void handle_cap_grant(struct inode *inode, ci->i_xattrs.blob = ceph_buffer_get(xattr_buf); ci->i_xattrs.version = version; ceph_forget_all_cached_acls(inode); + ceph_security_invalidate_secctx(inode); } } diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index 14d795e5fa73..b282d076dc9e 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -839,6 +839,9 @@ static int ceph_mknod(struct inode *dir, struct dentry *dentry, err = ceph_pre_init_acls(dir, &mode, &as_ctx); if (err < 0) goto out; + err = ceph_security_init_secctx(dentry, mode, &as_ctx); + if (err < 0) + goto out; dout("mknod in dir %p dentry %p mode 0%ho rdev %d\n", dir, dentry, mode, rdev); @@ -884,6 +887,7 @@ static int ceph_symlink(struct inode *dir, struct dentry *dentry, struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); struct ceph_mds_client *mdsc = fsc->mdsc; struct ceph_mds_request *req; + struct ceph_acl_sec_ctx as_ctx = {}; int err; if (ceph_snap(dir) != CEPH_NOSNAP) @@ -894,6 +898,10 @@ static int ceph_symlink(struct inode *dir, struct dentry *dentry, goto out; } + err = ceph_security_init_secctx(dentry, S_IFLNK | S_IRWXUGO, &as_ctx); + if (err < 0) + goto out; + dout("symlink in dir %p dentry %p to '%s'\n", dir, dentry, dest); req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SYMLINK, USE_AUTH_MDS); if (IS_ERR(req)) { @@ -919,6 +927,7 @@ static int ceph_symlink(struct inode *dir, struct dentry *dentry, out: if (err) d_drop(dentry); + ceph_release_acl_sec_ctx(&as_ctx); return err; } @@ -953,6 +962,9 @@ static int ceph_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) err = ceph_pre_init_acls(dir, &mode, &as_ctx); if (err < 0) goto out; + err = ceph_security_init_secctx(dentry, mode, &as_ctx); + if (err < 0) + goto out; req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); if (IS_ERR(req)) { diff --git a/fs/ceph/file.c b/fs/ceph/file.c index 5975345753d7..a7080783fe20 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -453,6 +453,9 @@ int ceph_atomic_open(struct inode *dir, struct dentry *dentry, err = ceph_pre_init_acls(dir, &mode, &as_ctx); if (err < 0) return err; + err = ceph_security_init_secctx(dentry, mode, &as_ctx); + if (err < 0) + goto out_ctx; } /* do the open */ diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index 30d0cdc21035..125ac54b5841 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -891,6 +891,7 @@ static int fill_inode(struct inode *inode, struct page *locked_page, iinfo->xattr_data, iinfo->xattr_len); ci->i_xattrs.version = le64_to_cpu(info->xattr_version); ceph_forget_all_cached_acls(inode); + ceph_security_invalidate_secctx(inode); xattr_blob = NULL; } diff --git a/fs/ceph/super.h b/fs/ceph/super.h index d7520ccf27e9..9c82d213a5ab 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -932,6 +932,10 @@ struct ceph_acl_sec_ctx { #ifdef CONFIG_CEPH_FS_POSIX_ACL void *default_acl; void *acl; +#endif +#ifdef CONFIG_CEPH_FS_SECURITY_LABEL + void *sec_ctx; + u32 sec_ctxlen; #endif struct ceph_pagelist *pagelist; }; @@ -950,6 +954,21 @@ static inline bool ceph_security_xattr_wanted(struct inode *in) } #endif +#ifdef CONFIG_CEPH_FS_SECURITY_LABEL +extern int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, + struct ceph_acl_sec_ctx *ctx); +extern void ceph_security_invalidate_secctx(struct inode *inode); +#else +static inline int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, + struct ceph_acl_sec_ctx *ctx) +{ + return 0; +} +static inline void ceph_security_invalidate_secctx(struct inode *inode) +{ +} +#endif + void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx); /* acl.c */ diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c index 518a5beed58c..fea70696f375 100644 --- a/fs/ceph/xattr.c +++ b/fs/ceph/xattr.c @@ -8,6 +8,7 @@ #include <linux/ceph/decode.h> #include <linux/xattr.h> +#include <linux/security.h> #include <linux/posix_acl_xattr.h> #include <linux/slab.h> @@ -17,26 +18,9 @@ static int __remove_xattr(struct ceph_inode_info *ci, struct ceph_inode_xattr *xattr); -static const struct xattr_handler ceph_other_xattr_handler; - -/* - * List of handlers for synthetic system.* attributes. Other - * attributes are handled directly. - */ -const struct xattr_handler *ceph_xattr_handlers[] = { -#ifdef CONFIG_CEPH_FS_POSIX_ACL - &posix_acl_access_xattr_handler, - &posix_acl_default_xattr_handler, -#endif - &ceph_other_xattr_handler, - NULL, -}; - static bool ceph_is_valid_xattr(const char *name) { return !strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN) || - !strncmp(name, XATTR_SECURITY_PREFIX, - XATTR_SECURITY_PREFIX_LEN) || !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) || !strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); } @@ -1196,6 +1180,110 @@ bool ceph_security_xattr_deadlock(struct inode *in) spin_unlock(&ci->i_ceph_lock); return ret; } + +#ifdef CONFIG_CEPH_FS_SECURITY_LABEL +int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, + struct ceph_acl_sec_ctx *as_ctx) +{ + struct ceph_pagelist *pagelist = as_ctx->pagelist; + const char *name; + size_t name_len; + int err; + + err = security_dentry_init_security(dentry, mode, &dentry->d_name, + &as_ctx->sec_ctx, + &as_ctx->sec_ctxlen); + if (err < 0) { + err = 0; /* do nothing */ + goto out; + } + + err = -ENOMEM; + if (!pagelist) { + pagelist = ceph_pagelist_alloc(GFP_KERNEL); + if (!pagelist) + goto out; + err = ceph_pagelist_reserve(pagelist, PAGE_SIZE); + if (err) + goto out; + ceph_pagelist_encode_32(pagelist, 1); + } + + /* + * FIXME: Make security_dentry_init_security() generic. Currently + * It only supports single security module and only selinux has + * dentry_init_security hook. + */ + name = XATTR_NAME_SELINUX; + name_len = strlen(name); + err = ceph_pagelist_reserve(pagelist, + 4 * 2 + name_len + as_ctx->sec_ctxlen); + if (err) + goto out; + + if (as_ctx->pagelist) { + /* update count of KV pairs */ + BUG_ON(pagelist->length <= sizeof(__le32)); + if (list_is_singular(&pagelist->head)) { + le32_add_cpu((__le32*)pagelist->mapped_tail, 1); + } else { + struct page *page = list_first_entry(&pagelist->head, + struct page, lru); + void *addr = kmap_atomic(page); + le32_add_cpu((__le32*)addr, 1); + kunmap_atomic(addr); + } + } else { + as_ctx->pagelist = pagelist; + } + + ceph_pagelist_encode_32(pagelist, name_len); + ceph_pagelist_append(pagelist, name, name_len); + + ceph_pagelist_encode_32(pagelist, as_ctx->sec_ctxlen); + ceph_pagelist_append(pagelist, as_ctx->sec_ctx, as_ctx->sec_ctxlen); + + err = 0; +out: + if (pagelist && !as_ctx->pagelist) + ceph_pagelist_release(pagelist); + return err; +} + +void ceph_security_invalidate_secctx(struct inode *inode) +{ + security_inode_invalidate_secctx(inode); +} + +static int ceph_xattr_set_security_label(const struct xattr_handler *handler, + struct dentry *unused, struct inode *inode, + const char *key, const void *buf, + size_t buflen, int flags) +{ + if (security_ismaclabel(key)) { + const char *name = xattr_full_name(handler, key); + return __ceph_setxattr(inode, name, buf, buflen, flags); + } + return -EOPNOTSUPP; +} + +static int ceph_xattr_get_security_label(const struct xattr_handler *handler, + struct dentry *unused, struct inode *inode, + const char *key, void *buf, size_t buflen) +{ + if (security_ismaclabel(key)) { + const char *name = xattr_full_name(handler, key); + return __ceph_getxattr(inode, name, buf, buflen); + } + return -EOPNOTSUPP; +} + +static const struct xattr_handler ceph_security_label_handler = { + .prefix = XATTR_SECURITY_PREFIX, + .get = ceph_xattr_get_security_label, + .set = ceph_xattr_set_security_label, +}; +#endif #endif void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx) @@ -1203,7 +1291,26 @@ void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx) #ifdef CONFIG_CEPH_FS_POSIX_ACL posix_acl_release(as_ctx->acl); posix_acl_release(as_ctx->default_acl); +#endif +#ifdef CONFIG_CEPH_FS_SECURITY_LABEL + security_release_secctx(as_ctx->sec_ctx, as_ctx->sec_ctxlen); #endif if (as_ctx->pagelist) ceph_pagelist_release(as_ctx->pagelist); } + +/* + * List of handlers for synthetic system.* attributes. Other + * attributes are handled directly. + */ +const struct xattr_handler *ceph_xattr_handlers[] = { +#ifdef CONFIG_CEPH_FS_POSIX_ACL + &posix_acl_access_xattr_handler, + &posix_acl_default_xattr_handler, +#endif +#ifdef CONFIG_CEPH_FS_SECURITY_LABEL + &ceph_security_label_handler, +#endif + &ceph_other_xattr_handler, + NULL, +};
When creating new file/directory, uses dentry_init_security() to prepare selinux context for the new inode, then sends openc/mkdir request to MDS, together with selinux xattr. Signed-off-by: "Yan, Zheng" <zyan@redhat.com> --- fs/ceph/Kconfig | 12 +++++ fs/ceph/caps.c | 1 + fs/ceph/dir.c | 12 +++++ fs/ceph/file.c | 3 ++ fs/ceph/inode.c | 1 + fs/ceph/super.h | 19 +++++++ fs/ceph/xattr.c | 141 ++++++++++++++++++++++++++++++++++++++++++------ 7 files changed, 172 insertions(+), 17 deletions(-)