From d984561b326cd0fe0d1183d11b9b4fa1d011d21d Mon Sep 17 00:00:00 2001 From: Jeff Mahoney Date: Mon, 30 Mar 2009 14:02:35 -0400 Subject: reiserfs: eliminate per-super xattr lock With the switch to using inode->i_mutex locking during lookups/creation in the xattr root, the per-super xattr lock is no longer needed. This patch removes it. Signed-off-by: Jeff Mahoney Signed-off-by: Linus Torvalds --- fs/reiserfs/xattr_acl.c | 74 ++++++++++++++++++++++--------------------------- 1 file changed, 33 insertions(+), 41 deletions(-) (limited to 'fs/reiserfs/xattr_acl.c') diff --git a/fs/reiserfs/xattr_acl.c b/fs/reiserfs/xattr_acl.c index 9128e4d5ba6..d63b2c5850c 100644 --- a/fs/reiserfs/xattr_acl.c +++ b/fs/reiserfs/xattr_acl.c @@ -172,6 +172,29 @@ static void *posix_acl_to_disk(const struct posix_acl *acl, size_t * size) return ERR_PTR(-EINVAL); } +static inline void iset_acl(struct inode *inode, struct posix_acl **i_acl, + struct posix_acl *acl) +{ + spin_lock(&inode->i_lock); + if (*i_acl != ERR_PTR(-ENODATA)) + posix_acl_release(*i_acl); + *i_acl = posix_acl_dup(acl); + spin_unlock(&inode->i_lock); +} + +static inline struct posix_acl *iget_acl(struct inode *inode, + struct posix_acl **i_acl) +{ + struct posix_acl *acl = ERR_PTR(-ENODATA); + + spin_lock(&inode->i_lock); + if (*i_acl != ERR_PTR(-ENODATA)) + acl = posix_acl_dup(*i_acl); + spin_unlock(&inode->i_lock); + + return acl; +} + /* * Inode operation get_posix_acl(). * @@ -199,11 +222,11 @@ struct posix_acl *reiserfs_get_acl(struct inode *inode, int type) return ERR_PTR(-EINVAL); } - if (IS_ERR(*p_acl)) { - if (PTR_ERR(*p_acl) == -ENODATA) - return NULL; - } else if (*p_acl != NULL) - return posix_acl_dup(*p_acl); + acl = iget_acl(inode, p_acl); + if (acl && !IS_ERR(acl)) + return acl; + else if (PTR_ERR(acl) == -ENODATA) + return NULL; size = reiserfs_xattr_get(inode, name, NULL, 0); if (size < 0) { @@ -229,7 +252,7 @@ struct posix_acl *reiserfs_get_acl(struct inode *inode, int type) } else { acl = posix_acl_from_disk(value, retval); if (!IS_ERR(acl)) - *p_acl = posix_acl_dup(acl); + iset_acl(inode, p_acl, acl); } kfree(value); @@ -300,16 +323,8 @@ reiserfs_set_acl(struct inode *inode, int type, struct posix_acl *acl) kfree(value); - if (!error) { - /* Release the old one */ - if (!IS_ERR(*p_acl) && *p_acl) - posix_acl_release(*p_acl); - - if (acl == NULL) - *p_acl = ERR_PTR(-ENODATA); - else - *p_acl = posix_acl_dup(acl); - } + if (!error) + iset_acl(inode, p_acl, acl); return error; } @@ -404,9 +419,7 @@ int reiserfs_cache_default_acl(struct inode *inode) if (reiserfs_posixacl(inode->i_sb) && !IS_PRIVATE(inode)) { struct posix_acl *acl; reiserfs_read_lock_xattr_i(inode); - reiserfs_read_lock_xattrs(inode->i_sb); acl = reiserfs_get_acl(inode, ACL_TYPE_DEFAULT); - reiserfs_read_unlock_xattrs(inode->i_sb); reiserfs_read_unlock_xattr_i(inode); ret = (acl && !IS_ERR(acl)); if (ret) @@ -429,9 +442,7 @@ int reiserfs_acl_chmod(struct inode *inode) return 0; } - reiserfs_read_lock_xattrs(inode->i_sb); acl = reiserfs_get_acl(inode, ACL_TYPE_ACCESS); - reiserfs_read_unlock_xattrs(inode->i_sb); if (!acl) return 0; if (IS_ERR(acl)) @@ -442,17 +453,8 @@ int reiserfs_acl_chmod(struct inode *inode) return -ENOMEM; error = posix_acl_chmod_masq(clone, inode->i_mode); if (!error) { - int lock = !has_xattr_dir(inode); reiserfs_write_lock_xattr_i(inode); - if (lock) - reiserfs_write_lock_xattrs(inode->i_sb); - else - reiserfs_read_lock_xattrs(inode->i_sb); error = reiserfs_set_acl(inode, ACL_TYPE_ACCESS, clone); - if (lock) - reiserfs_write_unlock_xattrs(inode->i_sb); - else - reiserfs_read_unlock_xattrs(inode->i_sb); reiserfs_write_unlock_xattr_i(inode); } posix_acl_release(clone); @@ -480,14 +482,9 @@ posix_acl_access_set(struct inode *inode, const char *name, static int posix_acl_access_del(struct inode *inode, const char *name) { struct reiserfs_inode_info *reiserfs_i = REISERFS_I(inode); - struct posix_acl **acl = &reiserfs_i->i_acl_access; if (strlen(name) != sizeof(POSIX_ACL_XATTR_ACCESS) - 1) return -EINVAL; - if (!IS_ERR(*acl) && *acl) { - posix_acl_release(*acl); - *acl = ERR_PTR(-ENODATA); - } - + iset_acl(inode, &reiserfs_i->i_acl_access, ERR_PTR(-ENODATA)); return 0; } @@ -533,14 +530,9 @@ posix_acl_default_set(struct inode *inode, const char *name, static int posix_acl_default_del(struct inode *inode, const char *name) { struct reiserfs_inode_info *reiserfs_i = REISERFS_I(inode); - struct posix_acl **acl = &reiserfs_i->i_acl_default; if (strlen(name) != sizeof(POSIX_ACL_XATTR_DEFAULT) - 1) return -EINVAL; - if (!IS_ERR(*acl) && *acl) { - posix_acl_release(*acl); - *acl = ERR_PTR(-ENODATA); - } - + iset_acl(inode, &reiserfs_i->i_acl_default, ERR_PTR(-ENODATA)); return 0; } -- cgit v1.2.3