Hello, This is an updated ACL patch that applies cleanly to the new stuff in the unstable tree. Thanks, Josef diff -r e7b93e86f40b acl.c --- a/acl.c Fri Jul 18 12:01:11 2008 -0400 +++ b/acl.c Fri Jul 18 19:34:01 2008 -0400 @@ -20,76 +20,302 @@ #include <linux/string.h> #include <linux/xattr.h> #include <linux/posix_acl_xattr.h> +#include <linux/posix_acl.h> #include <linux/sched.h> + #include "ctree.h" +#include "btrfs_inode.h" #include "xattr.h" -#ifndef is_owner_or_cap -#define is_owner_or_cap(inode) \ - ((current->fsuid == (inode)->i_uid) || capable(CAP_FOWNER)) -#endif + +static void btrfs_update_cached_acl(struct inode *inode, + struct posix_acl **p_acl, + struct posix_acl *acl) +{ + spin_lock(&inode->i_lock); + if (*p_acl && *p_acl != BTRFS_ACL_NOT_CACHED) + posix_acl_release(*p_acl); + *p_acl = posix_acl_dup(acl); + spin_unlock(&inode->i_lock); +} + +static struct posix_acl *btrfs_get_acl(struct inode *inode, int type) +{ + int size, name_index; + char *value = NULL; + struct posix_acl *acl = NULL, **p_acl; + + switch (type) { + case ACL_TYPE_ACCESS: + name_index = BTRFS_XATTR_INDEX_POSIX_ACL_ACCESS; + p_acl = &BTRFS_I(inode)->i_acl; + break; + case ACL_TYPE_DEFAULT: + name_index = BTRFS_XATTR_INDEX_POSIX_ACL_DEFAULT; + p_acl = &BTRFS_I(inode)->i_default_acl; + break; + default: + return ERR_PTR(-EINVAL); + } + + spin_lock(&inode->i_lock); + if (*p_acl != BTRFS_ACL_NOT_CACHED) + acl = posix_acl_dup(*p_acl); + spin_unlock(&inode->i_lock); + + if (acl) + return acl; + + + size = btrfs_xattr_get(inode, name_index, "", NULL, 0); + if (size > 0) { + value = kzalloc(size, GFP_NOFS); + if (!value) + return ERR_PTR(-ENOMEM); + size = btrfs_xattr_get(inode, name_index, "", value, size); + if (size > 0) { + acl = posix_acl_from_xattr(value, size); + btrfs_update_cached_acl(inode, p_acl, acl); + } + kfree(value); + } else if (size == -ENOENT) { + acl = NULL; + btrfs_update_cached_acl(inode, p_acl, acl); + } + + return acl; +} + +static int btrfs_xattr_get_acl(struct inode *inode, int type, + void *value, size_t size) +{ + struct posix_acl *acl; + int ret = 0; + + acl = btrfs_get_acl(inode, type); + + if (IS_ERR(acl)) + return PTR_ERR(acl); + if (acl == NULL) + return -ENODATA; + ret = posix_acl_to_xattr(acl, value, size); + posix_acl_release(acl); + + return ret; +} + +/* + * Needs to be called with fs_mutex held + */ +static int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type) +{ + int ret, name_index = 0, size = 0; + struct posix_acl **p_acl; + char *value = NULL; + mode_t mode; + + if (acl) { + ret = posix_acl_valid(acl); + if (ret < 0) + return ret; + ret = 0; + } + + switch (type) { + case ACL_TYPE_ACCESS: + mode = inode->i_mode; + ret = posix_acl_equiv_mode(acl, &mode); + if (ret < 0) + return ret; + ret = 0; + inode->i_mode = mode; + name_index = BTRFS_XATTR_INDEX_POSIX_ACL_ACCESS; + p_acl = &BTRFS_I(inode)->i_acl; + break; + case ACL_TYPE_DEFAULT: + if (!S_ISDIR(inode->i_mode)) + return acl ? -EINVAL : 0; + name_index = BTRFS_XATTR_INDEX_POSIX_ACL_DEFAULT; + p_acl = &BTRFS_I(inode)->i_default_acl; + break; + default: + return -EINVAL; + } + + if (acl) { + size = posix_acl_xattr_size(acl->a_count); + value = kmalloc(size, GFP_NOFS); + if (!value) { + ret = -ENOMEM; + goto out; + } + + ret = posix_acl_to_xattr(acl, value, size); + if (ret < 0) + goto out; + } + + ret = btrfs_xattr_set(inode, name_index, "", value, size, 0); + +out: + if (value) + kfree(value); + + if (!ret) + btrfs_update_cached_acl(inode, p_acl, acl); + + return ret; +} static int btrfs_xattr_set_acl(struct inode *inode, int type, const void *value, size_t size) { int ret = 0; - struct posix_acl *acl; + struct posix_acl *acl = NULL; - if (!is_owner_or_cap(inode)) - return -EPERM; if (value) { acl = posix_acl_from_xattr(value, size); if (acl == NULL) { value = NULL; size = 0; } else if (IS_ERR(acl)) { - ret = PTR_ERR(acl); - } else { - ret = posix_acl_valid(acl); - posix_acl_release(acl); + return PTR_ERR(acl); } - if (ret) - return ret; } - return btrfs_xattr_set(inode, type, "", value, size, 0); + + ret = btrfs_set_acl(inode, acl, type); + + posix_acl_release(acl); + + return ret; } -static int btrfs_xattr_get_acl(struct inode *inode, int type, - void *value, size_t size) -{ - return btrfs_xattr_get(inode, type, "", value, size); -} + static int btrfs_xattr_acl_access_get(struct inode *inode, const char *name, void *value, size_t size) { - if (*name != ''\0'') - return -EINVAL; - return btrfs_xattr_get_acl(inode, BTRFS_XATTR_INDEX_POSIX_ACL_ACCESS, - value, size); + return btrfs_xattr_get_acl(inode, ACL_TYPE_ACCESS, value, size); } + static int btrfs_xattr_acl_access_set(struct inode *inode, const char *name, const void *value, size_t size, int flags) { - if (*name != ''\0'') - return -EINVAL; - return btrfs_xattr_set_acl(inode, BTRFS_XATTR_INDEX_POSIX_ACL_ACCESS, - value, size); + return btrfs_xattr_set_acl(inode, ACL_TYPE_ACCESS, value, size); } + static int btrfs_xattr_acl_default_get(struct inode *inode, const char *name, void *value, size_t size) { - if (*name != ''\0'') - return -EINVAL; - return btrfs_xattr_get_acl(inode, BTRFS_XATTR_INDEX_POSIX_ACL_DEFAULT, - value, size); + return btrfs_xattr_get_acl(inode, ACL_TYPE_DEFAULT, value, size); } + static int btrfs_xattr_acl_default_set(struct inode *inode, const char *name, const void *value, size_t size, int flags) { - if (*name != ''\0'') - return -EINVAL; - return btrfs_xattr_set_acl(inode, BTRFS_XATTR_INDEX_POSIX_ACL_DEFAULT, - value, size); + return btrfs_xattr_set_acl(inode, ACL_TYPE_DEFAULT, value, size); } + +int btrfs_check_acl(struct inode *inode, int mask) +{ + struct posix_acl *acl; + int error = -EAGAIN; + + acl = btrfs_get_acl(inode, ACL_TYPE_ACCESS); + + if (IS_ERR(acl)) + return PTR_ERR(acl); + if (acl) { + error = posix_acl_permission(inode, acl, mask); + posix_acl_release(acl); + } + + return error; +} + +/* + * btrfs_init_acl is already generally called under fs_mutex, so the locking + * stuff has been fixed to work with that. If the locking stuff changes, we + * need to re-evaluate the acl locking stuff. + */ +int btrfs_init_acl(struct inode *inode, struct inode *dir) +{ + struct posix_acl *acl = NULL; + int ret = 0; + + /* this happens with subvols */ + if (!dir) + return 0; + + if (!S_ISLNK(inode->i_mode)) { + if (IS_POSIXACL(dir)) { + acl = btrfs_get_acl(dir, ACL_TYPE_DEFAULT); + if (IS_ERR(acl)) + return PTR_ERR(acl); + } + + if (!acl) + inode->i_mode &= ~current->fs->umask; + } + + if (IS_POSIXACL(dir) && acl) { + struct posix_acl *clone; + mode_t mode; + + if (S_ISDIR(inode->i_mode)) { + ret = btrfs_set_acl(inode, acl, ACL_TYPE_DEFAULT); + if (ret) + goto failed; + } + clone = posix_acl_clone(acl, GFP_NOFS); + ret = -ENOMEM; + if (!clone) + goto failed; + + mode = inode->i_mode; + ret = posix_acl_create_masq(clone, &mode); + if (ret >= 0) { + inode->i_mode = mode; + if (ret > 0) { + /* we need an acl */ + ret = btrfs_set_acl(inode, clone, + ACL_TYPE_ACCESS); + } + } + } +failed: + posix_acl_release(acl); + + return ret; +} + +int btrfs_acl_chmod(struct inode *inode) +{ + struct posix_acl *acl, *clone; + int ret = 0; + + if (S_ISLNK(inode->i_mode)) + return -EOPNOTSUPP; + + if (!IS_POSIXACL(inode)) + return 0; + + acl = btrfs_get_acl(inode, ACL_TYPE_ACCESS); + if (IS_ERR(acl) || !acl) + return PTR_ERR(acl); + + clone = posix_acl_clone(acl, GFP_KERNEL); + posix_acl_release(acl); + if (!clone) + return -ENOMEM; + + ret = posix_acl_chmod_masq(clone, inode->i_mode); + if (!ret) + ret = btrfs_set_acl(inode, clone, ACL_TYPE_ACCESS); + + posix_acl_release(clone); + + return ret; +} + struct xattr_handler btrfs_xattr_acl_default_handler = { .prefix = POSIX_ACL_XATTR_DEFAULT, .list = btrfs_xattr_generic_list, diff -r e7b93e86f40b btrfs_inode.h --- a/btrfs_inode.h Fri Jul 18 12:01:11 2008 -0400 +++ b/btrfs_inode.h Fri Jul 18 19:34:01 2008 -0400 @@ -36,6 +36,9 @@ struct btrfs_inode { struct inode vfs_inode; struct btrfs_ordered_inode_tree ordered_tree; + struct posix_acl *i_acl; + struct posix_acl *i_default_acl; + /* * transid of the trans_handle that last modified this inode */ diff -r e7b93e86f40b ctree.h --- a/ctree.h Fri Jul 18 12:01:11 2008 -0400 +++ b/ctree.h Fri Jul 18 19:34:01 2008 -0400 @@ -41,6 +41,8 @@ struct btrfs_ordered_sum; struct btrfs_ordered_sum; #define BTRFS_MAGIC "_B5RfS_M" + +#define BTRFS_ACL_NOT_CACHED ((void *)-1) #define BTRFS_MAX_LEVEL 8 @@ -1671,4 +1673,9 @@ u64 btrfs_parse_size(char *str); u64 btrfs_parse_size(char *str); int btrfs_parse_options(struct btrfs_root *root, char *options); int btrfs_sync_fs(struct super_block *sb, int wait); + +/* acl.c */ +int btrfs_check_acl(struct inode *inode, int mask); +int btrfs_init_acl(struct inode *inode, struct inode *dir); +int btrfs_acl_chmod(struct inode *inode); #endif diff -r e7b93e86f40b inode.c --- a/inode.c Fri Jul 18 12:01:11 2008 -0400 +++ b/inode.c Fri Jul 18 19:34:01 2008 -0400 @@ -36,6 +36,7 @@ #include <linux/bit_spinlock.h> #include <linux/version.h> #include <linux/xattr.h> +#include <linux/posix_acl.h> #include "ctree.h" #include "disk-io.h" #include "transaction.h" @@ -1440,6 +1441,9 @@ static int btrfs_setattr(struct dentry * } out: err = inode_setattr(inode, attr); + + if (!err && ((attr->ia_valid & ATTR_MODE))) + err = btrfs_acl_chmod(inode); fail: return err; } @@ -2058,6 +2062,12 @@ static int btrfs_mknod(struct inode *dir if (IS_ERR(inode)) goto out_unlock; + err = btrfs_init_acl(inode, dir); + if (err) { + drop_inode = 1; + goto out_unlock; + } + btrfs_set_trans_block_group(trans, inode); err = btrfs_add_nondir(trans, dentry, inode, 0); if (err) @@ -2112,6 +2122,12 @@ static int btrfs_create(struct inode *di err = PTR_ERR(inode); if (IS_ERR(inode)) goto out_unlock; + + err = btrfs_init_acl(inode, dir); + if (err) { + drop_inode = 1; + goto out_unlock; + } btrfs_set_trans_block_group(trans, inode); err = btrfs_add_nondir(trans, dentry, inode, 0); @@ -2235,6 +2251,11 @@ static int btrfs_mkdir(struct inode *dir } drop_on_err = 1; + + err = btrfs_init_acl(inode, dir); + if (err) + goto out_fail; + inode->i_op = &btrfs_dir_inode_operations; inode->i_fop = &btrfs_dir_file_operations; btrfs_set_trans_block_group(trans, inode); @@ -2893,6 +2914,8 @@ struct inode *btrfs_alloc_inode(struct s return NULL; ei->last_trans = 0; btrfs_ordered_inode_tree_init(&ei->ordered_tree); + ei->i_acl = BTRFS_ACL_NOT_CACHED; + ei->i_default_acl = BTRFS_ACL_NOT_CACHED; return &ei->vfs_inode; } @@ -2901,6 +2924,13 @@ void btrfs_destroy_inode(struct inode *i struct btrfs_ordered_extent *ordered; WARN_ON(!list_empty(&inode->i_dentry)); WARN_ON(inode->i_data.nrpages); + + if (BTRFS_I(inode)->i_acl && + BTRFS_I(inode)->i_acl != BTRFS_ACL_NOT_CACHED) + posix_acl_release(BTRFS_I(inode)->i_acl); + if (BTRFS_I(inode)->i_default_acl && + BTRFS_I(inode)->i_default_acl != BTRFS_ACL_NOT_CACHED) + posix_acl_release(BTRFS_I(inode)->i_default_acl); while(1) { ordered = btrfs_lookup_first_ordered_extent(inode, (u64)-1); @@ -3096,6 +3126,12 @@ static int btrfs_symlink(struct inode *d if (IS_ERR(inode)) goto out_unlock; + err = btrfs_init_acl(inode, dir); + if (err) { + drop_inode = 1; + goto out_unlock; + } + btrfs_set_trans_block_group(trans, inode); err = btrfs_add_nondir(trans, dentry, inode, 0); if (err) @@ -3176,7 +3212,7 @@ static int btrfs_permission(struct inode { if (btrfs_test_flag(inode, READONLY) && (mask & MAY_WRITE)) return -EACCES; - return generic_permission(inode, mask, NULL); + return generic_permission(inode, mask, btrfs_check_acl); } static struct inode_operations btrfs_dir_inode_operations = { @@ -3258,6 +3294,10 @@ static struct inode_operations btrfs_spe .getattr = btrfs_getattr, .setattr = btrfs_setattr, .permission = btrfs_permission, + .setxattr = generic_setxattr, + .getxattr = generic_getxattr, + .listxattr = btrfs_listxattr, + .removexattr = generic_removexattr, }; static struct inode_operations btrfs_symlink_inode_operations = { .readlink = generic_readlink, diff -r e7b93e86f40b super.c --- a/super.c Fri Jul 18 12:01:11 2008 -0400 +++ b/super.c Fri Jul 18 19:34:01 2008 -0400 @@ -67,7 +67,7 @@ enum { enum { Opt_degraded, Opt_subvol, Opt_device, Opt_nodatasum, Opt_nodatacow, Opt_max_extent, Opt_max_inline, Opt_alloc_start, Opt_nobarrier, - Opt_ssd, Opt_thread_pool, Opt_err, + Opt_ssd, Opt_thread_pool, Opt_noacl, Opt_err, }; static match_table_t tokens = { @@ -82,7 +82,8 @@ static match_table_t tokens = { {Opt_alloc_start, "alloc_start=%s"}, {Opt_thread_pool, "thread_pool=%d"}, {Opt_ssd, "ssd"}, - {Opt_err, NULL} + {Opt_noacl, "noacl"}, + {Opt_err, NULL}, }; u64 btrfs_parse_size(char *str) @@ -213,6 +214,9 @@ int btrfs_parse_options(struct btrfs_roo "btrfs: allocations start at %llu\n", info->alloc_start); } + break; + case Opt_noacl: + root->fs_info->sb->s_flags &= ~MS_POSIXACL; break; default: break; @@ -300,6 +304,7 @@ static int btrfs_fill_super(struct super sb->s_op = &btrfs_super_ops; sb->s_xattr = btrfs_xattr_handlers; sb->s_time_gran = 1; + sb->s_flags |= MS_POSIXACL; tree_root = open_ctree(sb, fs_devices, (char *)data); diff -r e7b93e86f40b xattr.c --- a/xattr.c Fri Jul 18 12:01:11 2008 -0400 +++ b/xattr.c Fri Jul 18 19:34:01 2008 -0400 @@ -26,25 +26,27 @@ #include "transaction.h" #include "xattr.h" #include "disk-io.h" + static struct xattr_handler *btrfs_xattr_handler_map[] = { [BTRFS_XATTR_INDEX_USER] = &btrfs_xattr_user_handler, #ifdef CONFIG_FS_POSIX_ACL -// [BTRFS_XATTR_INDEX_POSIX_ACL_ACCESS] = &btrfs_xattr_acl_access_handler, -// [BTRFS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &btrfs_xattr_acl_default_handler, + [BTRFS_XATTR_INDEX_POSIX_ACL_ACCESS] = &btrfs_xattr_acl_access_handler, + [BTRFS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &btrfs_xattr_acl_default_handler, #endif [BTRFS_XATTR_INDEX_TRUSTED] = &btrfs_xattr_trusted_handler, [BTRFS_XATTR_INDEX_SECURITY] = &btrfs_xattr_security_handler, -// [BTRFS_XATTR_INDEX_SYSTEM] = &btrfs_xattr_system_handler, + [BTRFS_XATTR_INDEX_SYSTEM] = &btrfs_xattr_system_handler, }; + struct xattr_handler *btrfs_xattr_handlers[] = { &btrfs_xattr_user_handler, #ifdef CONFIG_FS_POSIX_ACL -// &btrfs_xattr_acl_access_handler, -// &btrfs_xattr_acl_default_handler, + &btrfs_xattr_acl_access_handler, + &btrfs_xattr_acl_default_handler, #endif &btrfs_xattr_trusted_handler, &btrfs_xattr_security_handler, -// &btrfs_xattr_system_handler, + &btrfs_xattr_system_handler, NULL, }; @@ -237,10 +239,14 @@ int btrfs_xattr_set(struct inode *inode, mod = 1; goto out; } - } else if (flags & XATTR_REPLACE) { - /* we couldn''t find the attr to replace, so error out */ - ret = -ENODATA; - goto out; + } else { + btrfs_release_path(root, path); + + if (flags & XATTR_REPLACE) { + /* we couldn''t find the attr to replace */ + ret = -ENODATA; + goto out; + } } /* ok we have to create a completely new xattr */ -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html