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-rw-r--r--fs/ext3/acl.c281
1 files changed, 0 insertions, 281 deletions
diff --git a/fs/ext3/acl.c b/fs/ext3/acl.c
deleted file mode 100644
index 8bbaf5bcf982..000000000000
--- a/fs/ext3/acl.c
+++ /dev/null
@@ -1,281 +0,0 @@
-/*
- * linux/fs/ext3/acl.c
- *
- * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
- */
-
-#include "ext3.h"
-#include "xattr.h"
-#include "acl.h"
-
-/*
- * Convert from filesystem to in-memory representation.
- */
-static struct posix_acl *
-ext3_acl_from_disk(const void *value, size_t size)
-{
- const char *end = (char *)value + size;
- int n, count;
- struct posix_acl *acl;
-
- if (!value)
- return NULL;
- if (size < sizeof(ext3_acl_header))
- return ERR_PTR(-EINVAL);
- if (((ext3_acl_header *)value)->a_version !=
- cpu_to_le32(EXT3_ACL_VERSION))
- return ERR_PTR(-EINVAL);
- value = (char *)value + sizeof(ext3_acl_header);
- count = ext3_acl_count(size);
- if (count < 0)
- return ERR_PTR(-EINVAL);
- if (count == 0)
- return NULL;
- acl = posix_acl_alloc(count, GFP_NOFS);
- if (!acl)
- return ERR_PTR(-ENOMEM);
- for (n=0; n < count; n++) {
- ext3_acl_entry *entry =
- (ext3_acl_entry *)value;
- if ((char *)value + sizeof(ext3_acl_entry_short) > end)
- goto fail;
- acl->a_entries[n].e_tag = le16_to_cpu(entry->e_tag);
- acl->a_entries[n].e_perm = le16_to_cpu(entry->e_perm);
- switch(acl->a_entries[n].e_tag) {
- case ACL_USER_OBJ:
- case ACL_GROUP_OBJ:
- case ACL_MASK:
- case ACL_OTHER:
- value = (char *)value +
- sizeof(ext3_acl_entry_short);
- break;
-
- case ACL_USER:
- value = (char *)value + sizeof(ext3_acl_entry);
- if ((char *)value > end)
- goto fail;
- acl->a_entries[n].e_uid =
- make_kuid(&init_user_ns,
- le32_to_cpu(entry->e_id));
- break;
- case ACL_GROUP:
- value = (char *)value + sizeof(ext3_acl_entry);
- if ((char *)value > end)
- goto fail;
- acl->a_entries[n].e_gid =
- make_kgid(&init_user_ns,
- le32_to_cpu(entry->e_id));
- break;
-
- default:
- goto fail;
- }
- }
- if (value != end)
- goto fail;
- return acl;
-
-fail:
- posix_acl_release(acl);
- return ERR_PTR(-EINVAL);
-}
-
-/*
- * Convert from in-memory to filesystem representation.
- */
-static void *
-ext3_acl_to_disk(const struct posix_acl *acl, size_t *size)
-{
- ext3_acl_header *ext_acl;
- char *e;
- size_t n;
-
- *size = ext3_acl_size(acl->a_count);
- ext_acl = kmalloc(sizeof(ext3_acl_header) + acl->a_count *
- sizeof(ext3_acl_entry), GFP_NOFS);
- if (!ext_acl)
- return ERR_PTR(-ENOMEM);
- ext_acl->a_version = cpu_to_le32(EXT3_ACL_VERSION);
- e = (char *)ext_acl + sizeof(ext3_acl_header);
- for (n=0; n < acl->a_count; n++) {
- const struct posix_acl_entry *acl_e = &acl->a_entries[n];
- ext3_acl_entry *entry = (ext3_acl_entry *)e;
- entry->e_tag = cpu_to_le16(acl_e->e_tag);
- entry->e_perm = cpu_to_le16(acl_e->e_perm);
- switch(acl_e->e_tag) {
- case ACL_USER:
- entry->e_id = cpu_to_le32(
- from_kuid(&init_user_ns, acl_e->e_uid));
- e += sizeof(ext3_acl_entry);
- break;
- case ACL_GROUP:
- entry->e_id = cpu_to_le32(
- from_kgid(&init_user_ns, acl_e->e_gid));
- e += sizeof(ext3_acl_entry);
- break;
-
- case ACL_USER_OBJ:
- case ACL_GROUP_OBJ:
- case ACL_MASK:
- case ACL_OTHER:
- e += sizeof(ext3_acl_entry_short);
- break;
-
- default:
- goto fail;
- }
- }
- return (char *)ext_acl;
-
-fail:
- kfree(ext_acl);
- return ERR_PTR(-EINVAL);
-}
-
-/*
- * Inode operation get_posix_acl().
- *
- * inode->i_mutex: don't care
- */
-struct posix_acl *
-ext3_get_acl(struct inode *inode, int type)
-{
- int name_index;
- char *value = NULL;
- struct posix_acl *acl;
- int retval;
-
- switch (type) {
- case ACL_TYPE_ACCESS:
- name_index = EXT3_XATTR_INDEX_POSIX_ACL_ACCESS;
- break;
- case ACL_TYPE_DEFAULT:
- name_index = EXT3_XATTR_INDEX_POSIX_ACL_DEFAULT;
- break;
- default:
- BUG();
- }
-
- retval = ext3_xattr_get(inode, name_index, "", NULL, 0);
- if (retval > 0) {
- value = kmalloc(retval, GFP_NOFS);
- if (!value)
- return ERR_PTR(-ENOMEM);
- retval = ext3_xattr_get(inode, name_index, "", value, retval);
- }
- if (retval > 0)
- acl = ext3_acl_from_disk(value, retval);
- else if (retval == -ENODATA || retval == -ENOSYS)
- acl = NULL;
- else
- acl = ERR_PTR(retval);
- kfree(value);
-
- if (!IS_ERR(acl))
- set_cached_acl(inode, type, acl);
-
- return acl;
-}
-
-/*
- * Set the access or default ACL of an inode.
- *
- * inode->i_mutex: down unless called from ext3_new_inode
- */
-static int
-__ext3_set_acl(handle_t *handle, struct inode *inode, int type,
- struct posix_acl *acl)
-{
- int name_index;
- void *value = NULL;
- size_t size = 0;
- int error;
-
- switch(type) {
- case ACL_TYPE_ACCESS:
- name_index = EXT3_XATTR_INDEX_POSIX_ACL_ACCESS;
- if (acl) {
- error = posix_acl_equiv_mode(acl, &inode->i_mode);
- if (error < 0)
- return error;
- else {
- inode->i_ctime = CURRENT_TIME_SEC;
- ext3_mark_inode_dirty(handle, inode);
- if (error == 0)
- acl = NULL;
- }
- }
- break;
-
- case ACL_TYPE_DEFAULT:
- name_index = EXT3_XATTR_INDEX_POSIX_ACL_DEFAULT;
- if (!S_ISDIR(inode->i_mode))
- return acl ? -EACCES : 0;
- break;
-
- default:
- return -EINVAL;
- }
- if (acl) {
- value = ext3_acl_to_disk(acl, &size);
- if (IS_ERR(value))
- return (int)PTR_ERR(value);
- }
-
- error = ext3_xattr_set_handle(handle, inode, name_index, "",
- value, size, 0);
-
- kfree(value);
-
- if (!error)
- set_cached_acl(inode, type, acl);
-
- return error;
-}
-
-int
-ext3_set_acl(struct inode *inode, struct posix_acl *acl, int type)
-{
- handle_t *handle;
- int error, retries = 0;
-
-retry:
- handle = ext3_journal_start(inode, EXT3_DATA_TRANS_BLOCKS(inode->i_sb));
- if (IS_ERR(handle))
- return PTR_ERR(handle);
- error = __ext3_set_acl(handle, inode, type, acl);
- ext3_journal_stop(handle);
- if (error == -ENOSPC && ext3_should_retry_alloc(inode->i_sb, &retries))
- goto retry;
- return error;
-}
-
-/*
- * Initialize the ACLs of a new inode. Called from ext3_new_inode.
- *
- * dir->i_mutex: down
- * inode->i_mutex: up (access to inode is still exclusive)
- */
-int
-ext3_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
-{
- struct posix_acl *default_acl, *acl;
- int error;
-
- error = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
- if (error)
- return error;
-
- if (default_acl) {
- error = __ext3_set_acl(handle, inode, ACL_TYPE_DEFAULT,
- default_acl);
- posix_acl_release(default_acl);
- }
- if (acl) {
- if (!error)
- error = __ext3_set_acl(handle, inode, ACL_TYPE_ACCESS,
- acl);
- posix_acl_release(acl);
- }
- return error;
-}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.