#include <linux/reiserfs_acl.h>
#include <asm/uaccess.h>
-static int reiserfs_set_acl(struct inode *inode, int type,
+static int reiserfs_set_acl(struct reiserfs_transaction_handle *th,
+ struct inode *inode, int type,
struct posix_acl *acl);
static int
xattr_set_acl(struct inode *inode, int type, const void *value, size_t size)
{
struct posix_acl *acl;
- int error;
-
+ int error, error2;
+ struct reiserfs_transaction_handle th;
+ size_t jcreate_blocks;
if (!reiserfs_posixacl(inode->i_sb))
return -EOPNOTSUPP;
if (!is_owner_or_cap(inode))
} else
acl = NULL;
- error = reiserfs_set_acl(inode, type, acl);
+ /* Pessimism: We can't assume that anything from the xattr root up
+ * has been created. */
+
+ jcreate_blocks = reiserfs_xattr_jcreate_nblocks(inode) +
+ reiserfs_xattr_nblocks(inode, size) * 2;
+
+ reiserfs_write_lock(inode->i_sb);
+ error = journal_begin(&th, inode->i_sb, jcreate_blocks);
+ if (error == 0) {
+ error = reiserfs_set_acl(&th, inode, type, acl);
+ error2 = journal_end(&th, inode->i_sb, jcreate_blocks);
+ if (error2)
+ error = error2;
+ }
+ reiserfs_write_unlock(inode->i_sb);
release_and_out:
posix_acl_release(acl);
* BKL held [before 2.5.x]
*/
static int
-reiserfs_set_acl(struct inode *inode, int type, struct posix_acl *acl)
+reiserfs_set_acl(struct reiserfs_transaction_handle *th, struct inode *inode,
+ int type, struct posix_acl *acl)
{
char *name;
void *value = NULL;
return (int)PTR_ERR(value);
}
- error = __reiserfs_xattr_set(inode, name, value, size, 0);
+ error = reiserfs_xattr_set_handle(th, inode, name, value, size, 0);
/*
* Ensure that the inode gets dirtied if we're only using
/* dir->i_mutex: locked,
* inode is new and not released into the wild yet */
int
-reiserfs_inherit_default_acl(struct inode *dir, struct dentry *dentry,
+reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th,
+ struct inode *dir, struct dentry *dentry,
struct inode *inode)
{
struct posix_acl *acl;
/* Copy the default ACL to the default ACL of a new directory */
if (S_ISDIR(inode->i_mode)) {
- err = reiserfs_set_acl(inode, ACL_TYPE_DEFAULT, acl);
+ err = reiserfs_set_acl(th, inode, ACL_TYPE_DEFAULT,
+ acl);
if (err)
goto cleanup;
}
/* If we need an ACL.. */
if (need_acl > 0) {
- err =
- reiserfs_set_acl(inode, ACL_TYPE_ACCESS,
- acl_copy);
+ err = reiserfs_set_acl(th, inode,
+ ACL_TYPE_ACCESS,
+ acl_copy);
if (err)
goto cleanup_copy;
}
return err;
}
-/* Looks up and caches the result of the default ACL.
- * We do this so that we don't need to carry the xattr_sem into
- * reiserfs_new_inode if we don't need to */
+/* This is used to cache the default acl before a new object is created.
+ * The biggest reason for this is to get an idea of how many blocks will
+ * actually be required for the create operation if we must inherit an ACL.
+ * An ACL write can add up to 3 object creations and an additional file write
+ * so we'd prefer not to reserve that many blocks in the journal if we can.
+ * It also has the advantage of not loading the ACL with a transaction open,
+ * this may seem silly, but if the owner of the directory is doing the
+ * creation, the ACL may not be loaded since the permissions wouldn't require
+ * it.
+ * We return the number of blocks required for the transaction.
+ */
int reiserfs_cache_default_acl(struct inode *inode)
{
- int ret = 0;
- if (reiserfs_posixacl(inode->i_sb) && !IS_PRIVATE(inode)) {
- struct posix_acl *acl;
- acl = reiserfs_get_acl(inode, ACL_TYPE_DEFAULT);
- ret = (acl && !IS_ERR(acl));
- if (ret)
- posix_acl_release(acl);
+ struct posix_acl *acl;
+ int nblocks = 0;
+
+ if (IS_PRIVATE(inode))
+ return 0;
+
+ acl = reiserfs_get_acl(inode, ACL_TYPE_DEFAULT);
+
+ if (acl && !IS_ERR(acl)) {
+ int size = reiserfs_acl_size(acl->a_count);
+
+ /* Other xattrs can be created during inode creation. We don't
+ * want to claim too many blocks, so we check to see if we
+ * we need to create the tree to the xattrs, and then we
+ * just want two files. */
+ nblocks = reiserfs_xattr_jcreate_nblocks(inode);
+ nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
+
+ REISERFS_I(inode)->i_flags |= i_has_xattr_dir;
+
+ /* We need to account for writes + bitmaps for two files */
+ nblocks += reiserfs_xattr_nblocks(inode, size) * 4;
+ posix_acl_release(acl);
}
- return ret;
+ return nblocks;
}
int reiserfs_acl_chmod(struct inode *inode)
if (!clone)
return -ENOMEM;
error = posix_acl_chmod_masq(clone, inode->i_mode);
- if (!error)
- error = reiserfs_set_acl(inode, ACL_TYPE_ACCESS, clone);
+ if (!error) {
+ struct reiserfs_transaction_handle th;
+ size_t size = reiserfs_xattr_nblocks(inode,
+ reiserfs_acl_size(clone->a_count));
+ reiserfs_write_lock(inode->i_sb);
+ error = journal_begin(&th, inode->i_sb, size * 2);
+ if (!error) {
+ int error2;
+ error = reiserfs_set_acl(&th, inode, ACL_TYPE_ACCESS,
+ clone);
+ error2 = journal_end(&th, inode->i_sb, size * 2);
+ if (error2)
+ error = error2;
+ }
+ reiserfs_write_unlock(inode->i_sb);
+ }
posix_acl_release(clone);
return error;
}
projects / linux-2.6-omap-h63xx.git / blobdiff