return entry;
}
+static void *read_all_xattrs(struct inode *inode, struct page *ipage)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ struct f2fs_xattr_header *header;
+ size_t size = PAGE_SIZE, inline_size = 0;
+ void *txattr_addr;
+
+ inline_size = inline_xattr_size(inode);
+
+ txattr_addr = kzalloc(inline_size + size, GFP_KERNEL);
+ if (!txattr_addr)
+ return NULL;
+
+ /* read from inline xattr */
+ if (inline_size) {
+ struct page *page = NULL;
+ void *inline_addr;
+
+ if (ipage) {
+ inline_addr = inline_xattr_addr(ipage);
+ } else {
+ page = get_node_page(sbi, inode->i_ino);
+ if (IS_ERR(page))
+ goto fail;
+ inline_addr = inline_xattr_addr(page);
+ }
+ memcpy(txattr_addr, inline_addr, inline_size);
+ f2fs_put_page(page, 1);
+ }
+
+ /* read from xattr node block */
+ if (F2FS_I(inode)->i_xattr_nid) {
+ struct page *xpage;
+ void *xattr_addr;
+
+ /* The inode already has an extended attribute block. */
+ xpage = get_node_page(sbi, F2FS_I(inode)->i_xattr_nid);
+ if (IS_ERR(xpage))
+ goto fail;
+
+ xattr_addr = page_address(xpage);
+ memcpy(txattr_addr + inline_size, xattr_addr, PAGE_SIZE);
+ f2fs_put_page(xpage, 1);
+ }
+
+ header = XATTR_HDR(txattr_addr);
+
+ /* never been allocated xattrs */
+ if (le32_to_cpu(header->h_magic) != F2FS_XATTR_MAGIC) {
+ header->h_magic = cpu_to_le32(F2FS_XATTR_MAGIC);
+ header->h_refcount = cpu_to_le32(1);
+ }
+ return txattr_addr;
+fail:
+ kzfree(txattr_addr);
+ return NULL;
+}
+
+static inline int write_all_xattrs(struct inode *inode, __u32 hsize,
+ void *txattr_addr, struct page *ipage)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ size_t inline_size = 0;
+ void *xattr_addr;
+ struct page *xpage;
+ nid_t new_nid = 0;
+ int err;
+
+ inline_size = inline_xattr_size(inode);
+
+ if (hsize > inline_size && !F2FS_I(inode)->i_xattr_nid)
+ if (!alloc_nid(sbi, &new_nid))
+ return -ENOSPC;
+
+ /* write to inline xattr */
+ if (inline_size) {
+ struct page *page = NULL;
+ void *inline_addr;
+
+ if (ipage) {
+ inline_addr = inline_xattr_addr(ipage);
+ } else {
+ page = get_node_page(sbi, inode->i_ino);
+ if (IS_ERR(page)) {
+ alloc_nid_failed(sbi, new_nid);
+ return PTR_ERR(page);
+ }
+ inline_addr = inline_xattr_addr(page);
+ }
+ memcpy(inline_addr, txattr_addr, inline_size);
+ f2fs_put_page(page, 1);
+
+ /* no need to use xattr node block */
+ if (hsize <= inline_size) {
+ err = truncate_xattr_node(inode, ipage);
+ alloc_nid_failed(sbi, new_nid);
+ return err;
+ }
+ }
+
+ /* write to xattr node block */
+ if (F2FS_I(inode)->i_xattr_nid) {
+ xpage = get_node_page(sbi, F2FS_I(inode)->i_xattr_nid);
+ if (IS_ERR(xpage)) {
+ alloc_nid_failed(sbi, new_nid);
+ return PTR_ERR(xpage);
+ }
+ BUG_ON(new_nid);
+ } else {
+ struct dnode_of_data dn;
+ set_new_dnode(&dn, inode, NULL, NULL, new_nid);
+ xpage = new_node_page(&dn, XATTR_NODE_OFFSET, ipage);
+ if (IS_ERR(xpage)) {
+ alloc_nid_failed(sbi, new_nid);
+ return PTR_ERR(xpage);
+ }
+ alloc_nid_done(sbi, new_nid);
+ }
+
+ xattr_addr = page_address(xpage);
+ memcpy(xattr_addr, txattr_addr + inline_size, PAGE_SIZE -
+ sizeof(struct node_footer));
+ set_page_dirty(xpage);
+ f2fs_put_page(xpage, 1);
+
+ /* need to checkpoint during fsync */
+ F2FS_I(inode)->xattr_ver = cur_cp_version(F2FS_CKPT(sbi));
+ return 0;
+}
+
int f2fs_getxattr(struct inode *inode, int name_index, const char *name,
void *buffer, size_t buffer_size)
{
- struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
- struct f2fs_inode_info *fi = F2FS_I(inode);
struct f2fs_xattr_entry *entry;
- struct page *page;
+ void *base_addr;
int error = 0;
size_t value_len, name_len;
return -EINVAL;
name_len = strlen(name);
- if (!fi->i_xattr_nid)
- return -ENODATA;
-
- page = get_node_page(sbi, fi->i_xattr_nid);
- if (IS_ERR(page))
- return PTR_ERR(page);
+ base_addr = read_all_xattrs(inode, NULL);
+ if (!base_addr)
+ return -ENOMEM;
- entry = __find_xattr(page_address(page), name_index, name_len, name);
+ entry = __find_xattr(base_addr, name_index, name_len, name);
if (IS_XATTR_LAST_ENTRY(entry)) {
error = -ENODATA;
goto cleanup;
error = value_len;
cleanup:
- f2fs_put_page(page, 1);
+ kzfree(base_addr);
return error;
}
ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
{
struct inode *inode = dentry->d_inode;
- struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
- struct f2fs_inode_info *fi = F2FS_I(inode);
struct f2fs_xattr_entry *entry;
- struct page *page;
void *base_addr;
int error = 0;
size_t rest = buffer_size;
- if (!fi->i_xattr_nid)
- return 0;
-
- page = get_node_page(sbi, fi->i_xattr_nid);
- if (IS_ERR(page))
- return PTR_ERR(page);
- base_addr = page_address(page);
+ base_addr = read_all_xattrs(inode, NULL);
+ if (!base_addr)
+ return -ENOMEM;
list_for_each_xattr(entry, base_addr) {
const struct xattr_handler *handler =
}
error = buffer_size - rest;
cleanup:
- f2fs_put_page(page, 1);
+ kzfree(base_addr);
return error;
}
{
struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
struct f2fs_inode_info *fi = F2FS_I(inode);
- struct f2fs_xattr_header *header = NULL;
struct f2fs_xattr_entry *here, *last;
- struct page *page;
void *base_addr;
- int error, found, free, newsize;
+ int found, newsize;
size_t name_len;
- char *pval;
int ilock;
+ __u32 new_hsize;
+ int error = -ENOMEM;
if (name == NULL)
return -EINVAL;
name_len = strlen(name);
- if (name_len > F2FS_NAME_LEN || value_len > MAX_VALUE_LEN)
+ if (name_len > F2FS_NAME_LEN || value_len > MAX_VALUE_LEN(inode))
return -ERANGE;
f2fs_balance_fs(sbi);
ilock = mutex_lock_op(sbi);
- if (!fi->i_xattr_nid) {
- /* Allocate new attribute block */
- struct dnode_of_data dn;
- nid_t new_nid;
-
- if (!alloc_nid(sbi, &new_nid)) {
- error = -ENOSPC;
- goto exit;
- }
- set_new_dnode(&dn, inode, NULL, NULL, new_nid);
- mark_inode_dirty(inode);
-
- page = new_node_page(&dn, XATTR_NODE_OFFSET, ipage);
- if (IS_ERR(page)) {
- alloc_nid_failed(sbi, new_nid);
- error = PTR_ERR(page);
- goto exit;
- }
-
- alloc_nid_done(sbi, new_nid);
- base_addr = page_address(page);
- header = XATTR_HDR(base_addr);
- header->h_magic = cpu_to_le32(F2FS_XATTR_MAGIC);
- header->h_refcount = cpu_to_le32(1);
- } else {
- /* The inode already has an extended attribute block. */
- page = get_node_page(sbi, fi->i_xattr_nid);
- if (IS_ERR(page)) {
- error = PTR_ERR(page);
- goto exit;
- }
-
- base_addr = page_address(page);
- header = XATTR_HDR(base_addr);
- }
-
- if (le32_to_cpu(header->h_magic) != F2FS_XATTR_MAGIC) {
- error = -EIO;
- goto cleanup;
- }
+ base_addr = read_all_xattrs(inode, ipage);
+ if (!base_addr)
+ goto exit;
/* find entry with wanted name. */
here = __find_xattr(base_addr, name_index, name_len, name);
/* 1. Check space */
if (value) {
- /* If value is NULL, it is remove operation.
+ int free;
+ /*
+ * If value is NULL, it is remove operation.
* In case of update operation, we caculate free.
*/
- free = MIN_OFFSET - ((char *)last - (char *)header);
+ free = MIN_OFFSET(inode) - ((char *)last - (char *)base_addr);
if (found)
free = free - ENTRY_SIZE(here);
if (free < newsize) {
error = -ENOSPC;
- goto cleanup;
+ goto exit;
}
}
/* 2. Remove old entry */
if (found) {
- /* If entry is found, remove old entry.
+ /*
+ * If entry is found, remove old entry.
* If not found, remove operation is not needed.
*/
struct f2fs_xattr_entry *next = XATTR_NEXT_ENTRY(here);
memset(last, 0, oldsize);
}
+ new_hsize = (char *)last - (char *)base_addr;
+
/* 3. Write new entry */
if (value) {
- /* Before we come here, old entry is removed.
- * We just write new entry. */
+ char *pval;
+ /*
+ * Before we come here, old entry is removed.
+ * We just write new entry.
+ */
memset(last, 0, newsize);
last->e_name_index = name_index;
last->e_name_len = name_len;
pval = last->e_name + name_len;
memcpy(pval, value, value_len);
last->e_value_size = cpu_to_le16(value_len);
+ new_hsize += newsize;
}
- set_page_dirty(page);
- f2fs_put_page(page, 1);
+ error = write_all_xattrs(inode, new_hsize, base_addr, ipage);
+ if (error)
+ goto exit;
if (is_inode_flag_set(fi, FI_ACL_MODE)) {
inode->i_mode = fi->i_acl_mode;
clear_inode_flag(fi, FI_ACL_MODE);
}
- /* store checkpoint version for conducting checkpoint during fsync */
- fi->xattr_ver = cur_cp_version(F2FS_CKPT(sbi));
-
if (ipage)
update_inode(inode, ipage);
else
update_inode_page(inode);
- mutex_unlock_op(sbi, ilock);
-
- return 0;
-cleanup:
- f2fs_put_page(page, 1);
exit:
mutex_unlock_op(sbi, ilock);
+ kzfree(base_addr);
return error;
}
projects / sdk / emulator / emulator-kernel.git / commitdiff