diff options
Diffstat (limited to 'fs/jfs')
| -rw-r--r-- | fs/jfs/acl.c | 105 | ||||
| -rw-r--r-- | fs/jfs/file.c | 4 | ||||
| -rw-r--r-- | fs/jfs/jfs_acl.h | 7 | ||||
| -rw-r--r-- | fs/jfs/jfs_xattr.h | 2 | ||||
| -rw-r--r-- | fs/jfs/namei.c | 1 | ||||
| -rw-r--r-- | fs/jfs/super.c | 2 | ||||
| -rw-r--r-- | fs/jfs/xattr.c | 108 |
7 files changed, 89 insertions, 140 deletions
diff --git a/fs/jfs/acl.c b/fs/jfs/acl.c index d254d6d3599..e973b85d6af 100644 --- a/fs/jfs/acl.c +++ b/fs/jfs/acl.c @@ -72,7 +72,7 @@ struct posix_acl *jfs_get_acl(struct inode *inode, int type) return acl; } -static int jfs_set_acl(tid_t tid, struct inode *inode, int type, +static int __jfs_set_acl(tid_t tid, struct inode *inode, int type, struct posix_acl *acl) { char *ea_name; @@ -80,21 +80,22 @@ static int jfs_set_acl(tid_t tid, struct inode *inode, int type, int size = 0; char *value = NULL; - if (S_ISLNK(inode->i_mode)) - return -EOPNOTSUPP; - - switch(type) { - case ACL_TYPE_ACCESS: - ea_name = POSIX_ACL_XATTR_ACCESS; - break; - case ACL_TYPE_DEFAULT: - ea_name = POSIX_ACL_XATTR_DEFAULT; - if (!S_ISDIR(inode->i_mode)) - return acl ? -EACCES : 0; - break; - default: - return -EINVAL; + switch (type) { + case ACL_TYPE_ACCESS: + ea_name = POSIX_ACL_XATTR_ACCESS; + rc = posix_acl_equiv_mode(acl, &inode->i_mode); + if (rc < 0) + return rc; + if (rc == 0) + acl = NULL; + break; + case ACL_TYPE_DEFAULT: + ea_name = POSIX_ACL_XATTR_DEFAULT; + break; + default: + return -EINVAL; } + if (acl) { size = posix_acl_xattr_size(acl->a_count); value = kmalloc(size, GFP_KERNEL); @@ -114,65 +115,43 @@ out: return rc; } +int jfs_set_acl(struct inode *inode, struct posix_acl *acl, int type) +{ + int rc; + tid_t tid; + + tid = txBegin(inode->i_sb, 0); + mutex_lock(&JFS_IP(inode)->commit_mutex); + rc = __jfs_set_acl(tid, inode, type, acl); + if (!rc) + rc = txCommit(tid, 1, &inode, 0); + txEnd(tid); + mutex_unlock(&JFS_IP(inode)->commit_mutex); + return rc; +} + int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir) { - struct posix_acl *acl = NULL; + struct posix_acl *default_acl, *acl; int rc = 0; - if (S_ISLNK(inode->i_mode)) - return 0; + rc = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl); + if (rc) + return rc; - acl = jfs_get_acl(dir, ACL_TYPE_DEFAULT); - if (IS_ERR(acl)) - return PTR_ERR(acl); + if (default_acl) { + rc = __jfs_set_acl(tid, inode, ACL_TYPE_DEFAULT, default_acl); + posix_acl_release(default_acl); + } if (acl) { - if (S_ISDIR(inode->i_mode)) { - rc = jfs_set_acl(tid, inode, ACL_TYPE_DEFAULT, acl); - if (rc) - goto cleanup; - } - rc = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode); - if (rc < 0) - goto cleanup; /* posix_acl_release(NULL) is no-op */ - if (rc > 0) - rc = jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, acl); -cleanup: + if (!rc) + rc = __jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, acl); posix_acl_release(acl); - } else - inode->i_mode &= ~current_umask(); + } JFS_IP(inode)->mode2 = (JFS_IP(inode)->mode2 & 0xffff0000) | inode->i_mode; return rc; } - -int jfs_acl_chmod(struct inode *inode) -{ - struct posix_acl *acl; - int rc; - tid_t tid; - - if (S_ISLNK(inode->i_mode)) - return -EOPNOTSUPP; - - acl = jfs_get_acl(inode, ACL_TYPE_ACCESS); - if (IS_ERR(acl) || !acl) - return PTR_ERR(acl); - - rc = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode); - if (rc) - return rc; - - tid = txBegin(inode->i_sb, 0); - mutex_lock(&JFS_IP(inode)->commit_mutex); - rc = jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, acl); - if (!rc) - rc = txCommit(tid, 1, &inode, 0); - txEnd(tid); - mutex_unlock(&JFS_IP(inode)->commit_mutex); - - posix_acl_release(acl); - return rc; -} diff --git a/fs/jfs/file.c b/fs/jfs/file.c index dd7442c5835..794da944d5c 100644 --- a/fs/jfs/file.c +++ b/fs/jfs/file.c @@ -19,6 +19,7 @@ #include <linux/mm.h> #include <linux/fs.h> +#include <linux/posix_acl.h> #include <linux/quotaops.h> #include "jfs_incore.h" #include "jfs_inode.h" @@ -131,7 +132,7 @@ int jfs_setattr(struct dentry *dentry, struct iattr *iattr) mark_inode_dirty(inode); if (iattr->ia_valid & ATTR_MODE) - rc = jfs_acl_chmod(inode); + rc = posix_acl_chmod(inode, inode->i_mode); return rc; } @@ -143,6 +144,7 @@ const struct inode_operations jfs_file_inode_operations = { .setattr = jfs_setattr, #ifdef CONFIG_JFS_POSIX_ACL .get_acl = jfs_get_acl, + .set_acl = jfs_set_acl, #endif }; diff --git a/fs/jfs/jfs_acl.h b/fs/jfs/jfs_acl.h index ad84fe50ca9..489f993b7b1 100644 --- a/fs/jfs/jfs_acl.h +++ b/fs/jfs/jfs_acl.h @@ -21,8 +21,8 @@ #ifdef CONFIG_JFS_POSIX_ACL struct posix_acl *jfs_get_acl(struct inode *inode, int type); +int jfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); int jfs_init_acl(tid_t, struct inode *, struct inode *); -int jfs_acl_chmod(struct inode *inode); #else @@ -32,10 +32,5 @@ static inline int jfs_init_acl(tid_t tid, struct inode *inode, return 0; } -static inline int jfs_acl_chmod(struct inode *inode) -{ - return 0; -} - #endif #endif /* _H_JFS_ACL */ diff --git a/fs/jfs/jfs_xattr.h b/fs/jfs/jfs_xattr.h index e9e100fd7c0..e8d717dabca 100644 --- a/fs/jfs/jfs_xattr.h +++ b/fs/jfs/jfs_xattr.h @@ -61,6 +61,8 @@ extern ssize_t jfs_getxattr(struct dentry *, const char *, void *, size_t); extern ssize_t jfs_listxattr(struct dentry *, char *, size_t); extern int jfs_removexattr(struct dentry *, const char *); +extern const struct xattr_handler *jfs_xattr_handlers[]; + #ifdef CONFIG_JFS_SECURITY extern int jfs_init_security(tid_t, struct inode *, struct inode *, const struct qstr *); diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c index aa8a3370631..d59c7defb1e 100644 --- a/fs/jfs/namei.c +++ b/fs/jfs/namei.c @@ -1524,6 +1524,7 @@ const struct inode_operations jfs_dir_inode_operations = { .setattr = jfs_setattr, #ifdef CONFIG_JFS_POSIX_ACL .get_acl = jfs_get_acl, + .set_acl = jfs_set_acl, #endif }; diff --git a/fs/jfs/super.c b/fs/jfs/super.c index 6669aa2042c..e2b7483444f 100644 --- a/fs/jfs/super.c +++ b/fs/jfs/super.c @@ -44,6 +44,7 @@ #include "jfs_imap.h" #include "jfs_acl.h" #include "jfs_debug.h" +#include "jfs_xattr.h" MODULE_DESCRIPTION("The Journaled Filesystem (JFS)"); MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM"); @@ -522,6 +523,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent) */ sb->s_op = &jfs_super_operations; sb->s_export_op = &jfs_export_operations; + sb->s_xattr = jfs_xattr_handlers; #ifdef CONFIG_QUOTA sb->dq_op = &dquot_operations; sb->s_qcop = &dquot_quotactl_ops; diff --git a/fs/jfs/xattr.c b/fs/jfs/xattr.c index d3472f4cd53..5324e4e2b99 100644 --- a/fs/jfs/xattr.c +++ b/fs/jfs/xattr.c @@ -666,81 +666,12 @@ static int ea_put(tid_t tid, struct inode *inode, struct ea_buffer *ea_buf, } /* - * can_set_system_xattr - * - * This code is specific to the system.* namespace. It contains policy - * which doesn't belong in the main xattr codepath. - */ -static int can_set_system_xattr(struct inode *inode, const char *name, - const void *value, size_t value_len) -{ -#ifdef CONFIG_JFS_POSIX_ACL - struct posix_acl *acl; - int rc; - - if (!inode_owner_or_capable(inode)) - return -EPERM; - - /* - * POSIX_ACL_XATTR_ACCESS is tied to i_mode - */ - if (strcmp(name, POSIX_ACL_XATTR_ACCESS) == 0) { - acl = posix_acl_from_xattr(&init_user_ns, value, value_len); - if (IS_ERR(acl)) { - rc = PTR_ERR(acl); - printk(KERN_ERR "posix_acl_from_xattr returned %d\n", - rc); - return rc; - } - if (acl) { - rc = posix_acl_equiv_mode(acl, &inode->i_mode); - posix_acl_release(acl); - if (rc < 0) { - printk(KERN_ERR - "posix_acl_equiv_mode returned %d\n", - rc); - return rc; - } - mark_inode_dirty(inode); - } - /* - * We're changing the ACL. Get rid of the cached one - */ - forget_cached_acl(inode, ACL_TYPE_ACCESS); - - return 0; - } else if (strcmp(name, POSIX_ACL_XATTR_DEFAULT) == 0) { - acl = posix_acl_from_xattr(&init_user_ns, value, value_len); - if (IS_ERR(acl)) { - rc = PTR_ERR(acl); - printk(KERN_ERR "posix_acl_from_xattr returned %d\n", - rc); - return rc; - } - posix_acl_release(acl); - - /* - * We're changing the default ACL. Get rid of the cached one - */ - forget_cached_acl(inode, ACL_TYPE_DEFAULT); - - return 0; - } -#endif /* CONFIG_JFS_POSIX_ACL */ - return -EOPNOTSUPP; -} - -/* * Most of the permission checking is done by xattr_permission in the vfs. - * The local file system is responsible for handling the system.* namespace. * We also need to verify that this is a namespace that we recognize. */ static int can_set_xattr(struct inode *inode, const char *name, const void *value, size_t value_len) { - if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) - return can_set_system_xattr(inode, name, value, value_len); - if (!strncmp(name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN)) { /* * This makes sure that we aren't trying to set an @@ -748,7 +679,7 @@ static int can_set_xattr(struct inode *inode, const char *name, * with "os2." */ if (is_known_namespace(name + XATTR_OS2_PREFIX_LEN)) - return -EOPNOTSUPP; + return -EOPNOTSUPP; return 0; } @@ -913,6 +844,14 @@ int jfs_setxattr(struct dentry *dentry, const char *name, const void *value, if ((rc = can_set_xattr(inode, name, value, value_len))) return rc; + /* + * If this is a request for a synthetic attribute in the system.* + * namespace use the generic infrastructure to resolve a handler + * for it via sb->s_xattr. + */ + if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) + return generic_setxattr(dentry, name, value, value_len, flags); + if (value == NULL) { /* empty EA, do not remove */ value = ""; value_len = 0; @@ -986,6 +925,14 @@ ssize_t jfs_getxattr(struct dentry *dentry, const char *name, void *data, { int err; + /* + * If this is a request for a synthetic attribute in the system.* + * namespace use the generic infrastructure to resolve a handler + * for it via sb->s_xattr. + */ + if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) + return generic_getxattr(dentry, name, data, buf_size); + if (strncmp(name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN) == 0) { /* * skip past "os2." prefix @@ -1077,6 +1024,14 @@ int jfs_removexattr(struct dentry *dentry, const char *name) if ((rc = can_set_xattr(inode, name, NULL, 0))) return rc; + /* + * If this is a request for a synthetic attribute in the system.* + * namespace use the generic infrastructure to resolve a handler + * for it via sb->s_xattr. + */ + if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) + return generic_removexattr(dentry, name); + tid = txBegin(inode->i_sb, 0); mutex_lock(&ji->commit_mutex); rc = __jfs_setxattr(tid, dentry->d_inode, name, NULL, 0, XATTR_REPLACE); @@ -1088,6 +1043,19 @@ int jfs_removexattr(struct dentry *dentry, const char *name) return rc; } +/* + * List of handlers for synthetic system.* attributes. All real ondisk + * attributes are handled directly. + */ +const struct xattr_handler *jfs_xattr_handlers[] = { +#ifdef JFS_POSIX_ACL + &posix_acl_access_xattr_handler, + &posix_acl_default_xattr_handler, +#endif + NULL, +}; + + #ifdef CONFIG_JFS_SECURITY static int jfs_initxattrs(struct inode *inode, const struct xattr *xattr_array, void *fs_info) |