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helpers for acl caching + switch to those

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helpers: get_cached_acl(inode, type), set_cached_acl(inode, type, acl),
forget_cached_acl(inode, type).

ubifs/xattr.c needed includes reordered, the rest is a plain switchover.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2009-06-09 12:11:54 -04:00
parent 06b16e9f68
commit 073aaa1b14
10 changed files with 153 additions and 331 deletions
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60
fs/jffs2/acl.c
View File

@@ -156,47 +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 = ACL_NOT_CACHED;
spin_lock(&inode->i_lock);
if (*i_acl != 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 != 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 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, &inode->i_acl);
if (acl != ACL_NOT_CACHED)
return acl;
xprefix = JFFS2_XPREFIX_ACL_ACCESS;
break;
case ACL_TYPE_DEFAULT:
acl = jffs2_iget_acl(inode, &inode->i_default_acl);
if (acl != 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) {
@@ -214,16 +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, &inode->i_acl, acl);
break;
case ACL_TYPE_DEFAULT:
jffs2_iset_acl(inode, &inode->i_default_acl, acl);
break;
}
}
if (!IS_ERR(acl))
set_cached_acl(inode, type, acl);
return acl;
}
@@ -283,16 +253,8 @@ 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, &inode->i_acl, acl);
break;
case ACL_TYPE_DEFAULT:
jffs2_iset_acl(inode, &inode->i_default_acl, acl);
break;
}
}
if (!rc)
set_cached_acl(inode, type, acl);
return rc;
}
@@ -336,7 +298,7 @@ int jffs2_init_acl_pre(struct inode *dir_i, struct inode *inode, int *i_mode)
*i_mode &= ~current_umask();
} else {
if (S_ISDIR(*i_mode))
jffs2_iset_acl(inode, &inode->i_default_acl, acl);
set_cached_acl(inode, ACL_TYPE_DEFAULT, acl);
clone = posix_acl_clone(acl, GFP_KERNEL);
if (!clone)
@@ -347,7 +309,7 @@ int jffs2_init_acl_pre(struct inode *dir_i, struct inode *inode, int *i_mode)
return rc;
}
if (rc > 0)
jffs2_iset_acl(inode, &inode->i_acl, clone);
set_cached_acl(inode, ACL_TYPE_ACCESS, clone);
posix_acl_release(clone);
}