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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/fs/jffs2/acl.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/fs/jffs2/acl.c')
-rw-r--r--ANDROID_3.4.5/fs/jffs2/acl.c415
1 files changed, 0 insertions, 415 deletions
diff --git a/ANDROID_3.4.5/fs/jffs2/acl.c b/ANDROID_3.4.5/fs/jffs2/acl.c
deleted file mode 100644
index 922f146e..00000000
--- a/ANDROID_3.4.5/fs/jffs2/acl.c
+++ /dev/null
@@ -1,415 +0,0 @@
-/*
- * JFFS2 -- Journalling Flash File System, Version 2.
- *
- * Copyright © 2006 NEC Corporation
- *
- * Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
- *
- * For licensing information, see the file 'LICENCE' in this directory.
- *
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/fs.h>
-#include <linux/sched.h>
-#include <linux/time.h>
-#include <linux/crc32.h>
-#include <linux/jffs2.h>
-#include <linux/xattr.h>
-#include <linux/posix_acl_xattr.h>
-#include <linux/mtd/mtd.h>
-#include "nodelist.h"
-
-static size_t jffs2_acl_size(int count)
-{
- if (count <= 4) {
- return sizeof(struct jffs2_acl_header)
- + count * sizeof(struct jffs2_acl_entry_short);
- } else {
- return sizeof(struct jffs2_acl_header)
- + 4 * sizeof(struct jffs2_acl_entry_short)
- + (count - 4) * sizeof(struct jffs2_acl_entry);
- }
-}
-
-static int jffs2_acl_count(size_t size)
-{
- size_t s;
-
- size -= sizeof(struct jffs2_acl_header);
- 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;
- }
-}
-
-static struct posix_acl *jffs2_acl_from_medium(void *value, size_t size)
-{
- void *end = value + size;
- struct jffs2_acl_header *header = value;
- struct jffs2_acl_entry *entry;
- struct posix_acl *acl;
- uint32_t ver;
- int i, count;
-
- if (!value)
- return NULL;
- if (size < sizeof(struct jffs2_acl_header))
- return ERR_PTR(-EINVAL);
- ver = je32_to_cpu(header->a_version);
- if (ver != JFFS2_ACL_VERSION) {
- JFFS2_WARNING("Invalid ACL version. (=%u)\n", ver);
- return ERR_PTR(-EINVAL);
- }
-
- value += sizeof(struct jffs2_acl_header);
- count = jffs2_acl_count(size);
- if (count < 0)
- return ERR_PTR(-EINVAL);
- if (count == 0)
- return NULL;
-
- acl = posix_acl_alloc(count, GFP_KERNEL);
- if (!acl)
- return ERR_PTR(-ENOMEM);
-
- for (i=0; i < count; i++) {
- entry = value;
- if (value + sizeof(struct jffs2_acl_entry_short) > end)
- goto fail;
- acl->a_entries[i].e_tag = je16_to_cpu(entry->e_tag);
- acl->a_entries[i].e_perm = je16_to_cpu(entry->e_perm);
- switch (acl->a_entries[i].e_tag) {
- case ACL_USER_OBJ:
- case ACL_GROUP_OBJ:
- case ACL_MASK:
- case ACL_OTHER:
- value += sizeof(struct jffs2_acl_entry_short);
- acl->a_entries[i].e_id = ACL_UNDEFINED_ID;
- break;
-
- case ACL_USER:
- case ACL_GROUP:
- value += sizeof(struct jffs2_acl_entry);
- if (value > end)
- goto fail;
- acl->a_entries[i].e_id = je32_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);
-}
-
-static void *jffs2_acl_to_medium(const struct posix_acl *acl, size_t *size)
-{
- struct jffs2_acl_header *header;
- struct jffs2_acl_entry *entry;
- void *e;
- size_t i;
-
- *size = jffs2_acl_size(acl->a_count);
- header = kmalloc(sizeof(*header) + acl->a_count * sizeof(*entry), GFP_KERNEL);
- if (!header)
- return ERR_PTR(-ENOMEM);
- header->a_version = cpu_to_je32(JFFS2_ACL_VERSION);
- e = header + 1;
- for (i=0; i < acl->a_count; i++) {
- entry = e;
- entry->e_tag = cpu_to_je16(acl->a_entries[i].e_tag);
- entry->e_perm = cpu_to_je16(acl->a_entries[i].e_perm);
- switch(acl->a_entries[i].e_tag) {
- case ACL_USER:
- case ACL_GROUP:
- entry->e_id = cpu_to_je32(acl->a_entries[i].e_id);
- e += sizeof(struct jffs2_acl_entry);
- break;
-
- case ACL_USER_OBJ:
- case ACL_GROUP_OBJ:
- case ACL_MASK:
- case ACL_OTHER:
- e += sizeof(struct jffs2_acl_entry_short);
- break;
-
- default:
- goto fail;
- }
- }
- return header;
- fail:
- kfree(header);
- return ERR_PTR(-EINVAL);
-}
-
-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:
- xprefix = JFFS2_XPREFIX_ACL_ACCESS;
- break;
- case ACL_TYPE_DEFAULT:
- xprefix = JFFS2_XPREFIX_ACL_DEFAULT;
- break;
- default:
- BUG();
- }
- rc = do_jffs2_getxattr(inode, xprefix, "", NULL, 0);
- if (rc > 0) {
- value = kmalloc(rc, GFP_KERNEL);
- if (!value)
- return ERR_PTR(-ENOMEM);
- rc = do_jffs2_getxattr(inode, xprefix, "", value, rc);
- }
- if (rc > 0) {
- acl = jffs2_acl_from_medium(value, rc);
- } else if (rc == -ENODATA || rc == -ENOSYS) {
- acl = NULL;
- } else {
- acl = ERR_PTR(rc);
- }
- if (value)
- kfree(value);
- if (!IS_ERR(acl))
- set_cached_acl(inode, type, acl);
- return acl;
-}
-
-static int __jffs2_set_acl(struct inode *inode, int xprefix, struct posix_acl *acl)
-{
- char *value = NULL;
- size_t size = 0;
- int rc;
-
- if (acl) {
- value = jffs2_acl_to_medium(acl, &size);
- if (IS_ERR(value))
- return PTR_ERR(value);
- }
- rc = do_jffs2_setxattr(inode, xprefix, "", value, size, 0);
- if (!value && rc == -ENODATA)
- rc = 0;
- kfree(value);
-
- return rc;
-}
-
-static int jffs2_set_acl(struct inode *inode, int type, struct posix_acl *acl)
-{
- int rc, xprefix;
-
- if (S_ISLNK(inode->i_mode))
- return -EOPNOTSUPP;
-
- switch (type) {
- case ACL_TYPE_ACCESS:
- xprefix = JFFS2_XPREFIX_ACL_ACCESS;
- if (acl) {
- umode_t mode = inode->i_mode;
- rc = posix_acl_equiv_mode(acl, &mode);
- if (rc < 0)
- return rc;
- if (inode->i_mode != mode) {
- struct iattr attr;
-
- 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;
- }
- if (rc == 0)
- acl = NULL;
- }
- break;
- case ACL_TYPE_DEFAULT:
- xprefix = JFFS2_XPREFIX_ACL_DEFAULT;
- if (!S_ISDIR(inode->i_mode))
- return acl ? -EACCES : 0;
- break;
- default:
- return -EINVAL;
- }
- rc = __jffs2_set_acl(inode, xprefix, acl);
- if (!rc)
- set_cached_acl(inode, type, acl);
- return rc;
-}
-
-int jffs2_init_acl_pre(struct inode *dir_i, struct inode *inode, umode_t *i_mode)
-{
- struct posix_acl *acl;
- int rc;
-
- cache_no_acl(inode);
-
- if (S_ISLNK(*i_mode))
- return 0; /* Symlink always has no-ACL */
-
- acl = jffs2_get_acl(dir_i, ACL_TYPE_DEFAULT);
- if (IS_ERR(acl))
- return PTR_ERR(acl);
-
- if (!acl) {
- *i_mode &= ~current_umask();
- } else {
- if (S_ISDIR(*i_mode))
- set_cached_acl(inode, ACL_TYPE_DEFAULT, acl);
-
- rc = posix_acl_create(&acl, GFP_KERNEL, i_mode);
- if (rc < 0)
- return rc;
- if (rc > 0)
- set_cached_acl(inode, ACL_TYPE_ACCESS, acl);
-
- posix_acl_release(acl);
- }
- return 0;
-}
-
-int jffs2_init_acl_post(struct inode *inode)
-{
- int rc;
-
- if (inode->i_default_acl) {
- rc = __jffs2_set_acl(inode, JFFS2_XPREFIX_ACL_DEFAULT, inode->i_default_acl);
- if (rc)
- return rc;
- }
-
- if (inode->i_acl) {
- rc = __jffs2_set_acl(inode, JFFS2_XPREFIX_ACL_ACCESS, inode->i_acl);
- if (rc)
- return rc;
- }
-
- return 0;
-}
-
-int jffs2_acl_chmod(struct inode *inode)
-{
- struct posix_acl *acl;
- int rc;
-
- if (S_ISLNK(inode->i_mode))
- return -EOPNOTSUPP;
- acl = jffs2_get_acl(inode, ACL_TYPE_ACCESS);
- if (IS_ERR(acl) || !acl)
- return PTR_ERR(acl);
- rc = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
- if (rc)
- return rc;
- rc = jffs2_set_acl(inode, ACL_TYPE_ACCESS, acl);
- posix_acl_release(acl);
- return rc;
-}
-
-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);
-
- if (list && retlen <= list_size)
- strcpy(list, POSIX_ACL_XATTR_ACCESS);
- return retlen;
-}
-
-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);
-
- if (list && retlen <= list_size)
- strcpy(list, POSIX_ACL_XATTR_DEFAULT);
- return retlen;
-}
-
-static int jffs2_acl_getxattr(struct dentry *dentry, const char *name,
- void *buffer, size_t size, int type)
-{
- struct posix_acl *acl;
- int rc;
-
- if (name[0] != '\0')
- return -EINVAL;
-
- acl = jffs2_get_acl(dentry->d_inode, type);
- if (IS_ERR(acl))
- return PTR_ERR(acl);
- if (!acl)
- return -ENODATA;
- rc = posix_acl_to_xattr(acl, buffer, size);
- posix_acl_release(acl);
-
- return rc;
-}
-
-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 (name[0] != '\0')
- return -EINVAL;
- if (!inode_owner_or_capable(dentry->d_inode))
- return -EPERM;
-
- if (value) {
- acl = posix_acl_from_xattr(value, size);
- if (IS_ERR(acl))
- return PTR_ERR(acl);
- if (acl) {
- rc = posix_acl_valid(acl);
- if (rc)
- goto out;
- }
- } else {
- acl = NULL;
- }
- rc = jffs2_set_acl(dentry->d_inode, type, acl);
- out:
- posix_acl_release(acl);
- return rc;
-}
-
-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_getxattr,
- .set = jffs2_acl_setxattr,
-};
-
-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_getxattr,
- .set = jffs2_acl_setxattr,
-};