ext3: Use bitops to read/modify EXT3_I(inode)->i_state

At several places we modify EXT3_I(inode)->i_state without holding i_mutex
(ext3_release_file, ext3_bmap, ext3_journalled_writepage, ext3_do_update_inode,
...). These modifications are racy and we can lose updates to i_state. So
convert handling of i_state to use bitops which are atomic.

Signed-off-by: Jan Kara <jack@suse.cz>

1 files changed, 7 insertions, 7 deletions

diff --git a/fs/ext3/xattr.c b/fs/ext3/xattr.c
index 66895ccf76c7..2d2fb2a85961 100644
--- a/fs/ext3/xattr.c
+++ b/fs/ext3/xattr.c
@@ -274,7 +274,7 @@ ext3_xattr_ibody_get(struct inode *inode, int name_index, const char *name,
         void *end;
         int error;
 
-        if (!(EXT3_I(inode)->i_state & EXT3_STATE_XATTR))
+        if (!ext3_test_inode_state(inode, EXT3_STATE_XATTR))
                 return -ENODATA;
         error = ext3_get_inode_loc(inode, &iloc);
         if (error)
@@ -403,7 +403,7 @@ ext3_xattr_ibody_list(struct dentry *dentry, char *buffer, size_t buffer_size)
         void *end;
         int error;
 
-        if (!(EXT3_I(inode)->i_state & EXT3_STATE_XATTR))
+        if (!ext3_test_inode_state(inode, EXT3_STATE_XATTR))
                 return 0;
         error = ext3_get_inode_loc(inode, &iloc);
         if (error)
@@ -882,7 +882,7 @@ ext3_xattr_ibody_find(struct inode *inode, struct ext3_xattr_info *i,
         is->s.base = is->s.first = IFIRST(header);
         is->s.here = is->s.first;
         is->s.end = (void *)raw_inode + EXT3_SB(inode->i_sb)->s_inode_size;
-        if (EXT3_I(inode)->i_state & EXT3_STATE_XATTR) {
+        if (ext3_test_inode_state(inode, EXT3_STATE_XATTR)) {
                 error = ext3_xattr_check_names(IFIRST(header), is->s.end);
                 if (error)
                         return error;
@@ -914,10 +914,10 @@ ext3_xattr_ibody_set(handle_t *handle, struct inode *inode,
         header = IHDR(inode, ext3_raw_inode(&is->iloc));
         if (!IS_LAST_ENTRY(s->first)) {
                 header->h_magic = cpu_to_le32(EXT3_XATTR_MAGIC);
-                EXT3_I(inode)->i_state |= EXT3_STATE_XATTR;
+                ext3_set_inode_state(inode, EXT3_STATE_XATTR);
         } else {
                 header->h_magic = cpu_to_le32(0);
-                EXT3_I(inode)->i_state &= ~EXT3_STATE_XATTR;
+                ext3_clear_inode_state(inode, EXT3_STATE_XATTR);
         }
         return 0;
 }
@@ -967,10 +967,10 @@ ext3_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
         if (error)
                 goto cleanup;
 
-        if (EXT3_I(inode)->i_state & EXT3_STATE_NEW) {
+        if (ext3_test_inode_state(inode, EXT3_STATE_NEW)) {
                 struct ext3_inode *raw_inode = ext3_raw_inode(&is.iloc);
                 memset(raw_inode, 0, EXT3_SB(inode->i_sb)->s_inode_size);
-                EXT3_I(inode)->i_state &= ~EXT3_STATE_NEW;
+                ext3_clear_inode_state(inode, EXT3_STATE_NEW);
         }
 
         error = ext3_xattr_ibody_find(inode, &i, &is);