X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=fs%2Fjffs2%2Facl.c;h=54a92fd02bbd63b2d75543f59bd816b4d738e2e4;hb=3975d16760d4be7402d1067c548c30c427971331;hp=d98713777a1b62f2aa12f659dd872616d2dbeb4a;hpb=e6305c43eda10ebfd2ad9e35d6e172ccc7bb3695;p=safe%2Fjmp%2Flinux-2.6 diff --git a/fs/jffs2/acl.c b/fs/jffs2/acl.c index d987137..54a92fd 100644 --- a/fs/jffs2/acl.c +++ b/fs/jffs2/acl.c @@ -38,12 +38,12 @@ static int jffs2_acl_count(size_t size) size_t s; size -= sizeof(struct jffs2_acl_header); - s = size - 4 * sizeof(struct jffs2_acl_entry_short); - if (s < 0) { + if (size < 4 * sizeof(struct jffs2_acl_entry_short)) { if (size % sizeof(struct jffs2_acl_entry_short)) return -1; return size / sizeof(struct jffs2_acl_entry_short); } else { + s = size - 4 * sizeof(struct jffs2_acl_entry_short); if (s % sizeof(struct jffs2_acl_entry)) return -1; return s / sizeof(struct jffs2_acl_entry) + 4; @@ -156,48 +156,25 @@ static void *jffs2_acl_to_medium(const struct posix_acl *acl, size_t *size) return ERR_PTR(-EINVAL); } -static struct posix_acl *jffs2_iget_acl(struct inode *inode, struct posix_acl **i_acl) -{ - struct posix_acl *acl = JFFS2_ACL_NOT_CACHED; - - spin_lock(&inode->i_lock); - if (*i_acl != JFFS2_ACL_NOT_CACHED) - acl = posix_acl_dup(*i_acl); - spin_unlock(&inode->i_lock); - return acl; -} - -static void jffs2_iset_acl(struct inode *inode, struct posix_acl **i_acl, struct posix_acl *acl) -{ - spin_lock(&inode->i_lock); - if (*i_acl != JFFS2_ACL_NOT_CACHED) - posix_acl_release(*i_acl); - *i_acl = posix_acl_dup(acl); - spin_unlock(&inode->i_lock); -} - static struct posix_acl *jffs2_get_acl(struct inode *inode, int type) { - struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); struct posix_acl *acl; char *value = NULL; int rc, xprefix; + acl = get_cached_acl(inode, type); + if (acl != ACL_NOT_CACHED) + return acl; + switch (type) { case ACL_TYPE_ACCESS: - acl = jffs2_iget_acl(inode, &f->i_acl_access); - if (acl != JFFS2_ACL_NOT_CACHED) - return acl; xprefix = JFFS2_XPREFIX_ACL_ACCESS; break; case ACL_TYPE_DEFAULT: - acl = jffs2_iget_acl(inode, &f->i_acl_default); - if (acl != JFFS2_ACL_NOT_CACHED) - return acl; xprefix = JFFS2_XPREFIX_ACL_DEFAULT; break; default: - return ERR_PTR(-EINVAL); + BUG(); } rc = do_jffs2_getxattr(inode, xprefix, "", NULL, 0); if (rc > 0) { @@ -215,16 +192,8 @@ static struct posix_acl *jffs2_get_acl(struct inode *inode, int type) } if (value) kfree(value); - if (!IS_ERR(acl)) { - switch (type) { - case ACL_TYPE_ACCESS: - jffs2_iset_acl(inode, &f->i_acl_access, acl); - break; - case ACL_TYPE_DEFAULT: - jffs2_iset_acl(inode, &f->i_acl_default, acl); - break; - } - } + if (!IS_ERR(acl)) + set_cached_acl(inode, type, acl); return acl; } @@ -249,7 +218,6 @@ static int __jffs2_set_acl(struct inode *inode, int xprefix, struct posix_acl *a static int jffs2_set_acl(struct inode *inode, int type, struct posix_acl *acl) { - struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); int rc, xprefix; if (S_ISLNK(inode->i_mode)) @@ -266,8 +234,9 @@ static int jffs2_set_acl(struct inode *inode, int type, struct posix_acl *acl) if (inode->i_mode != mode) { struct iattr attr; - attr.ia_valid = ATTR_MODE; + attr.ia_valid = ATTR_MODE | ATTR_CTIME; attr.ia_mode = mode; + attr.ia_ctime = CURRENT_TIME_SEC; rc = jffs2_do_setattr(inode, &attr); if (rc < 0) return rc; @@ -285,20 +254,12 @@ static int jffs2_set_acl(struct inode *inode, int type, struct posix_acl *acl) return -EINVAL; } rc = __jffs2_set_acl(inode, xprefix, acl); - if (!rc) { - switch(type) { - case ACL_TYPE_ACCESS: - jffs2_iset_acl(inode, &f->i_acl_access, acl); - break; - case ACL_TYPE_DEFAULT: - jffs2_iset_acl(inode, &f->i_acl_default, acl); - break; - } - } + if (!rc) + set_cached_acl(inode, type, acl); return rc; } -static int jffs2_check_acl(struct inode *inode, int mask) +int jffs2_check_acl(struct inode *inode, int mask) { struct posix_acl *acl; int rc; @@ -314,19 +275,12 @@ static int jffs2_check_acl(struct inode *inode, int mask) return -EAGAIN; } -int jffs2_permission(struct inode *inode, int mask) -{ - return generic_permission(inode, mask, jffs2_check_acl); -} - int jffs2_init_acl_pre(struct inode *dir_i, struct inode *inode, int *i_mode) { - struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); struct posix_acl *acl, *clone; int rc; - f->i_acl_default = NULL; - f->i_acl_access = NULL; + cache_no_acl(inode); if (S_ISLNK(*i_mode)) return 0; /* Symlink always has no-ACL */ @@ -336,10 +290,10 @@ int jffs2_init_acl_pre(struct inode *dir_i, struct inode *inode, int *i_mode) return PTR_ERR(acl); if (!acl) { - *i_mode &= ~current->fs->umask; + *i_mode &= ~current_umask(); } else { if (S_ISDIR(*i_mode)) - jffs2_iset_acl(inode, &f->i_acl_default, acl); + set_cached_acl(inode, ACL_TYPE_DEFAULT, acl); clone = posix_acl_clone(acl, GFP_KERNEL); if (!clone) @@ -350,7 +304,7 @@ int jffs2_init_acl_pre(struct inode *dir_i, struct inode *inode, int *i_mode) return rc; } if (rc > 0) - jffs2_iset_acl(inode, &f->i_acl_access, clone); + set_cached_acl(inode, ACL_TYPE_ACCESS, clone); posix_acl_release(clone); } @@ -359,17 +313,16 @@ int jffs2_init_acl_pre(struct inode *dir_i, struct inode *inode, int *i_mode) int jffs2_init_acl_post(struct inode *inode) { - struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); int rc; - if (f->i_acl_default) { - rc = __jffs2_set_acl(inode, JFFS2_XPREFIX_ACL_DEFAULT, f->i_acl_default); + if (inode->i_default_acl) { + rc = __jffs2_set_acl(inode, JFFS2_XPREFIX_ACL_DEFAULT, inode->i_default_acl); if (rc) return rc; } - if (f->i_acl_access) { - rc = __jffs2_set_acl(inode, JFFS2_XPREFIX_ACL_ACCESS, f->i_acl_access); + if (inode->i_acl) { + rc = __jffs2_set_acl(inode, JFFS2_XPREFIX_ACL_ACCESS, inode->i_acl); if (rc) return rc; } @@ -377,18 +330,6 @@ int jffs2_init_acl_post(struct inode *inode) return 0; } -void jffs2_clear_acl(struct jffs2_inode_info *f) -{ - if (f->i_acl_access && f->i_acl_access != JFFS2_ACL_NOT_CACHED) { - posix_acl_release(f->i_acl_access); - f->i_acl_access = JFFS2_ACL_NOT_CACHED; - } - if (f->i_acl_default && f->i_acl_default != JFFS2_ACL_NOT_CACHED) { - posix_acl_release(f->i_acl_default); - f->i_acl_default = JFFS2_ACL_NOT_CACHED; - } -} - int jffs2_acl_chmod(struct inode *inode) { struct posix_acl *acl, *clone; @@ -410,8 +351,8 @@ int jffs2_acl_chmod(struct inode *inode) return rc; } -static size_t jffs2_acl_access_listxattr(struct inode *inode, char *list, size_t list_size, - const char *name, size_t name_len) +static size_t jffs2_acl_access_listxattr(struct dentry *dentry, char *list, + size_t list_size, const char *name, size_t name_len, int type) { const int retlen = sizeof(POSIX_ACL_XATTR_ACCESS); @@ -420,8 +361,8 @@ static size_t jffs2_acl_access_listxattr(struct inode *inode, char *list, size_t return retlen; } -static size_t jffs2_acl_default_listxattr(struct inode *inode, char *list, size_t list_size, - const char *name, size_t name_len) +static size_t jffs2_acl_default_listxattr(struct dentry *dentry, char *list, + size_t list_size, const char *name, size_t name_len, int type) { const int retlen = sizeof(POSIX_ACL_XATTR_DEFAULT); @@ -430,12 +371,16 @@ static size_t jffs2_acl_default_listxattr(struct inode *inode, char *list, size_ return retlen; } -static int jffs2_acl_getxattr(struct inode *inode, int type, void *buffer, size_t size) +static int jffs2_acl_getxattr(struct dentry *dentry, const char *name, + void *buffer, size_t size, int type) { struct posix_acl *acl; int rc; - acl = jffs2_get_acl(inode, type); + if (name[0] != '\0') + return -EINVAL; + + acl = jffs2_get_acl(dentry->d_inode, type); if (IS_ERR(acl)) return PTR_ERR(acl); if (!acl) @@ -446,26 +391,15 @@ static int jffs2_acl_getxattr(struct inode *inode, int type, void *buffer, size_ return rc; } -static int jffs2_acl_access_getxattr(struct inode *inode, const char *name, void *buffer, size_t size) -{ - if (name[0] != '\0') - return -EINVAL; - return jffs2_acl_getxattr(inode, ACL_TYPE_ACCESS, buffer, size); -} - -static int jffs2_acl_default_getxattr(struct inode *inode, const char *name, void *buffer, size_t size) -{ - if (name[0] != '\0') - return -EINVAL; - return jffs2_acl_getxattr(inode, ACL_TYPE_DEFAULT, buffer, size); -} - -static int jffs2_acl_setxattr(struct inode *inode, int type, const void *value, size_t size) +static int jffs2_acl_setxattr(struct dentry *dentry, const char *name, + const void *value, size_t size, int flags, int type) { struct posix_acl *acl; int rc; - if (!is_owner_or_cap(inode)) + if (name[0] != '\0') + return -EINVAL; + if (!is_owner_or_cap(dentry->d_inode)) return -EPERM; if (value) { @@ -480,38 +414,24 @@ static int jffs2_acl_setxattr(struct inode *inode, int type, const void *value, } else { acl = NULL; } - rc = jffs2_set_acl(inode, type, acl); + rc = jffs2_set_acl(dentry->d_inode, type, acl); out: posix_acl_release(acl); return rc; } -static int jffs2_acl_access_setxattr(struct inode *inode, const char *name, - const void *buffer, size_t size, int flags) -{ - if (name[0] != '\0') - return -EINVAL; - return jffs2_acl_setxattr(inode, ACL_TYPE_ACCESS, buffer, size); -} - -static int jffs2_acl_default_setxattr(struct inode *inode, const char *name, - const void *buffer, size_t size, int flags) -{ - if (name[0] != '\0') - return -EINVAL; - return jffs2_acl_setxattr(inode, ACL_TYPE_DEFAULT, buffer, size); -} - -struct xattr_handler jffs2_acl_access_xattr_handler = { +const struct xattr_handler jffs2_acl_access_xattr_handler = { .prefix = POSIX_ACL_XATTR_ACCESS, + .flags = ACL_TYPE_DEFAULT, .list = jffs2_acl_access_listxattr, - .get = jffs2_acl_access_getxattr, - .set = jffs2_acl_access_setxattr, + .get = jffs2_acl_getxattr, + .set = jffs2_acl_setxattr, }; -struct xattr_handler jffs2_acl_default_xattr_handler = { +const struct xattr_handler jffs2_acl_default_xattr_handler = { .prefix = POSIX_ACL_XATTR_DEFAULT, + .flags = ACL_TYPE_DEFAULT, .list = jffs2_acl_default_listxattr, - .get = jffs2_acl_default_getxattr, - .set = jffs2_acl_default_setxattr, + .get = jffs2_acl_getxattr, + .set = jffs2_acl_setxattr, };