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Diffstat (limited to 'Documentation/filesystems/ext4/ondisk/eainode.rst')
| -rw-r--r-- | Documentation/filesystems/ext4/ondisk/eainode.rst | 18 |
1 files changed, 0 insertions, 18 deletions
diff --git a/Documentation/filesystems/ext4/ondisk/eainode.rst b/Documentation/filesystems/ext4/ondisk/eainode.rst deleted file mode 100644 index ecc0d01a0a72..000000000000 --- a/Documentation/filesystems/ext4/ondisk/eainode.rst +++ /dev/null @@ -1,18 +0,0 @@ -.. SPDX-License-Identifier: GPL-2.0 - -Large Extended Attribute Values -------------------------------- - -To enable ext4 to store extended attribute values that do not fit in the -inode or in the single extended attribute block attached to an inode, -the EA\_INODE feature allows us to store the value in the data blocks of -a regular file inode. This “EA inode” is linked only from the extended -attribute name index and must not appear in a directory entry. The -inode's i\_atime field is used to store a checksum of the xattr value; -and i\_ctime/i\_version store a 64-bit reference count, which enables -sharing of large xattr values between multiple owning inodes. For -backward compatibility with older versions of this feature, the -i\_mtime/i\_generation *may* store a back-reference to the inode number -and i\_generation of the **one** owning inode (in cases where the EA -inode is not referenced by multiple inodes) to verify that the EA inode -is the correct one being accessed. |