ext4: fix the number of credits needed for acl ops with inline data

Operations which modify extended attributes may need extra journal
credits if inline data is used, since there is a chance that some
extended attributes may need to get pushed to an external attribute
block.

Changes to reflect this was made in xattr.c, but they were missed in
fs/ext4/acl.c.  To fix this, abstract the calculation of the number of
credits needed for xattr operations to an inline function defined in
ext4_jbd2.h, and use it in acl.c and xattr.c.

Also move the function declarations used in inline.c from xattr.h
(where they are non-obviously hidden, and caused problems since
ext4_jbd2.h needs to use the function ext4_has_inline_data), and move
them to ext4.h.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Tao Ma <boyu.mt@taobao.com>
Reviewed-by: Jan Kara <jack@suse.cz>

diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index 406cf8b..39a54a0 100644 (file)
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -325,7 +325,7 @@ ext4_acl_chmod(struct inode *inode)
                return error;
 retry:
        handle = ext4_journal_start(inode, EXT4_HT_XATTR,
-                       EXT4_DATA_TRANS_BLOCKS(inode->i_sb));
+                                   ext4_jbd2_credits_xattr(inode));
        if (IS_ERR(handle)) {
                error = PTR_ERR(handle);
                ext4_std_error(inode->i_sb, error);
@@ -423,7 +423,7 @@ ext4_xattr_set_acl(struct dentry *dentry, const char *name, const void *value,
 
 retry:
        handle = ext4_journal_start(inode, EXT4_HT_XATTR,
-                                   EXT4_DATA_TRANS_BLOCKS(inode->i_sb));
+                                   ext4_jbd2_credits_xattr(inode));
        if (IS_ERR(handle)) {
                error = PTR_ERR(handle);
                goto release_and_out;

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index a5ae87c..61ecf05 100644 (file)
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2456,6 +2456,75 @@ extern const struct file_operations ext4_file_operations;
 extern loff_t ext4_llseek(struct file *file, loff_t offset, int origin);
 extern void ext4_unwritten_wait(struct inode *inode);
 
+/* inline.c */
+extern int ext4_has_inline_data(struct inode *inode);
+extern int ext4_get_inline_size(struct inode *inode);
+extern int ext4_get_max_inline_size(struct inode *inode);
+extern int ext4_find_inline_data_nolock(struct inode *inode);
+extern void ext4_write_inline_data(struct inode *inode,
+                                  struct ext4_iloc *iloc,
+                                  void *buffer, loff_t pos,
+                                  unsigned int len);
+extern int ext4_prepare_inline_data(handle_t *handle, struct inode *inode,
+                                   unsigned int len);
+extern int ext4_init_inline_data(handle_t *handle, struct inode *inode,
+                                unsigned int len);
+extern int ext4_destroy_inline_data(handle_t *handle, struct inode *inode);
+
+extern int ext4_readpage_inline(struct inode *inode, struct page *page);
+extern int ext4_try_to_write_inline_data(struct address_space *mapping,
+                                        struct inode *inode,
+                                        loff_t pos, unsigned len,
+                                        unsigned flags,
+                                        struct page **pagep);
+extern int ext4_write_inline_data_end(struct inode *inode,
+                                     loff_t pos, unsigned len,
+                                     unsigned copied,
+                                     struct page *page);
+extern struct buffer_head *
+ext4_journalled_write_inline_data(struct inode *inode,
+                                 unsigned len,
+                                 struct page *page);
+extern int ext4_da_write_inline_data_begin(struct address_space *mapping,
+                                          struct inode *inode,
+                                          loff_t pos, unsigned len,
+                                          unsigned flags,
+                                          struct page **pagep,
+                                          void **fsdata);
+extern int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos,
+                                        unsigned len, unsigned copied,
+                                        struct page *page);
+extern int ext4_try_add_inline_entry(handle_t *handle, struct dentry *dentry,
+                                    struct inode *inode);
+extern int ext4_try_create_inline_dir(handle_t *handle,
+                                     struct inode *parent,
+                                     struct inode *inode);
+extern int ext4_read_inline_dir(struct file *filp,
+                               void *dirent, filldir_t filldir,
+                               int *has_inline_data);
+extern struct buffer_head *ext4_find_inline_entry(struct inode *dir,
+                                       const struct qstr *d_name,
+                                       struct ext4_dir_entry_2 **res_dir,
+                                       int *has_inline_data);
+extern int ext4_delete_inline_entry(handle_t *handle,
+                                   struct inode *dir,
+                                   struct ext4_dir_entry_2 *de_del,
+                                   struct buffer_head *bh,
+                                   int *has_inline_data);
+extern int empty_inline_dir(struct inode *dir, int *has_inline_data);
+extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode,
+                                       struct ext4_dir_entry_2 **parent_de,
+                                       int *retval);
+extern int ext4_inline_data_fiemap(struct inode *inode,
+                                  struct fiemap_extent_info *fieinfo,
+                                  int *has_inline);
+extern int ext4_try_to_evict_inline_data(handle_t *handle,
+                                        struct inode *inode,
+                                        int needed);
+extern void ext4_inline_data_truncate(struct inode *inode, int *has_inline);
+
+extern int ext4_convert_inline_data(struct inode *inode);
+
 /* namei.c */
 extern const struct inode_operations ext4_dir_inode_operations;
 extern const struct inode_operations ext4_special_inode_operations;

diff --git a/fs/ext4/ext4_jbd2.h b/fs/ext4/ext4_jbd2.h
index c1fc2dc..4c216b1 100644 (file)
--- a/fs/ext4/ext4_jbd2.h
+++ b/fs/ext4/ext4_jbd2.h
@@ -104,6 +104,20 @@
 #define EXT4_MAXQUOTAS_INIT_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_INIT_BLOCKS(sb))
 #define EXT4_MAXQUOTAS_DEL_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_DEL_BLOCKS(sb))
 
+static inline int ext4_jbd2_credits_xattr(struct inode *inode)
+{
+       int credits = EXT4_DATA_TRANS_BLOCKS(inode->i_sb);
+
+       /*
+        * In case of inline data, we may push out the data to a block,
+        * so we need to reserve credits for this eventuality
+        */
+       if (ext4_has_inline_data(inode))
+               credits += ext4_writepage_trans_blocks(inode) + 1;
+       return credits;
+}
+
+
 /*
  * Ext4 handle operation types -- for logging purposes
  */

diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 2efc560..cc31da0 100644 (file)
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -1165,16 +1165,9 @@ ext4_xattr_set(struct inode *inode, int name_index, const char *name,
 {
        handle_t *handle;
        int error, retries = 0;
-       int credits = EXT4_DATA_TRANS_BLOCKS(inode->i_sb);
+       int credits = ext4_jbd2_credits_xattr(inode);
 
 retry:
-       /*
-        * In case of inline data, we may push out the data to a block,
-        * So reserve the journal space first.
-        */
-       if (ext4_has_inline_data(inode))
-               credits += ext4_writepage_trans_blocks(inode) + 1;
-
        handle = ext4_journal_start(inode, EXT4_HT_XATTR, credits);
        if (IS_ERR(handle)) {
                error = PTR_ERR(handle);

diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h
index 69eda78..aa25deb 100644 (file)
--- a/fs/ext4/xattr.h
+++ b/fs/ext4/xattr.h
@@ -125,74 +125,6 @@ extern int ext4_xattr_ibody_inline_set(handle_t *handle, struct inode *inode,
                                       struct ext4_xattr_info *i,
                                       struct ext4_xattr_ibody_find *is);
 
-extern int ext4_has_inline_data(struct inode *inode);
-extern int ext4_get_inline_size(struct inode *inode);
-extern int ext4_get_max_inline_size(struct inode *inode);
-extern int ext4_find_inline_data_nolock(struct inode *inode);
-extern void ext4_write_inline_data(struct inode *inode,
-                                  struct ext4_iloc *iloc,
-                                  void *buffer, loff_t pos,
-                                  unsigned int len);
-extern int ext4_prepare_inline_data(handle_t *handle, struct inode *inode,
-                                   unsigned int len);
-extern int ext4_init_inline_data(handle_t *handle, struct inode *inode,
-                                unsigned int len);
-extern int ext4_destroy_inline_data(handle_t *handle, struct inode *inode);
-
-extern int ext4_readpage_inline(struct inode *inode, struct page *page);
-extern int ext4_try_to_write_inline_data(struct address_space *mapping,
-                                        struct inode *inode,
-                                        loff_t pos, unsigned len,
-                                        unsigned flags,
-                                        struct page **pagep);
-extern int ext4_write_inline_data_end(struct inode *inode,
-                                     loff_t pos, unsigned len,
-                                     unsigned copied,
-                                     struct page *page);
-extern struct buffer_head *
-ext4_journalled_write_inline_data(struct inode *inode,
-                                 unsigned len,
-                                 struct page *page);
-extern int ext4_da_write_inline_data_begin(struct address_space *mapping,
-                                          struct inode *inode,
-                                          loff_t pos, unsigned len,
-                                          unsigned flags,
-                                          struct page **pagep,
-                                          void **fsdata);
-extern int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos,
-                                        unsigned len, unsigned copied,
-                                        struct page *page);
-extern int ext4_try_add_inline_entry(handle_t *handle, struct dentry *dentry,
-                                    struct inode *inode);
-extern int ext4_try_create_inline_dir(handle_t *handle,
-                                     struct inode *parent,
-                                     struct inode *inode);
-extern int ext4_read_inline_dir(struct file *filp,
-                               void *dirent, filldir_t filldir,
-                               int *has_inline_data);
-extern struct buffer_head *ext4_find_inline_entry(struct inode *dir,
-                                       const struct qstr *d_name,
-                                       struct ext4_dir_entry_2 **res_dir,
-                                       int *has_inline_data);
-extern int ext4_delete_inline_entry(handle_t *handle,
-                                   struct inode *dir,
-                                   struct ext4_dir_entry_2 *de_del,
-                                   struct buffer_head *bh,
-                                   int *has_inline_data);
-extern int empty_inline_dir(struct inode *dir, int *has_inline_data);
-extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode,
-                                       struct ext4_dir_entry_2 **parent_de,
-                                       int *retval);
-extern int ext4_inline_data_fiemap(struct inode *inode,
-                                  struct fiemap_extent_info *fieinfo,
-                                  int *has_inline);
-extern int ext4_try_to_evict_inline_data(handle_t *handle,
-                                        struct inode *inode,
-                                        int needed);
-extern void ext4_inline_data_truncate(struct inode *inode, int *has_inline);
-
-extern int ext4_convert_inline_data(struct inode *inode);
-
 #ifdef CONFIG_EXT4_FS_SECURITY
 extern int ext4_init_security(handle_t *handle, struct inode *inode,
                              struct inode *dir, const struct qstr *qstr);