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| author | Theodore Ts'o <tytso@mit.edu> | 2013-04-04 06:04:52 +0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2013-04-04 06:04:52 +0400 |
| commit | 996bb9fddd5b68d1dfb5e27d30ca2c7a72448596 (patch) | |
| tree | a066fe717c593c2189f886612fbe1282cfb7fdcc /fs/ext4/ioctl.c | |
| parent | d76a3a77113db020d9bb1e894822869410450bd9 (diff) | |
| download | linux-996bb9fddd5b68d1dfb5e27d30ca2c7a72448596.tar.xz | |
ext4: support simple conversion of extent-mapped inodes to use i_blocks
In order to make it simpler to test the code which support
i_blocks/indirect-mapped inodes, support the conversion of inodes
which are less than 12 blocks and which are contained in no more than
a single extent.
The primary intended use of this code is to converting freshly created
zero-length files and empty directories.
Note that the version of chattr in e2fsprogs 1.42.7 and earlier has a
check that prevents the clearing of the extent flag. A simple patch
which allows "chattr -e <file>" to work will be checked into the
e2fsprogs git repository.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/ioctl.c')
| -rw-r--r-- | fs/ext4/ioctl.c | 20 |
1 files changed, 8 insertions, 12 deletions
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c index 721f4d33e148..a07b7bc0856a 100644 --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -83,17 +83,8 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) if (!capable(CAP_SYS_RESOURCE)) goto flags_out; } - if (oldflags & EXT4_EXTENTS_FL) { - /* We don't support clearning extent flags */ - if (!(flags & EXT4_EXTENTS_FL)) { - err = -EOPNOTSUPP; - goto flags_out; - } - } else if (flags & EXT4_EXTENTS_FL) { - /* migrate the file */ + if ((flags ^ oldflags) & EXT4_EXTENTS_FL) migrate = 1; - flags &= ~EXT4_EXTENTS_FL; - } if (flags & EXT4_EOFBLOCKS_FL) { /* we don't support adding EOFBLOCKS flag */ @@ -137,8 +128,13 @@ flags_err: err = ext4_change_inode_journal_flag(inode, jflag); if (err) goto flags_out; - if (migrate) - err = ext4_ext_migrate(inode); + if (migrate) { + if (flags & EXT4_EXTENTS_FL) + err = ext4_ext_migrate(inode); + else + err = ext4_ind_migrate(inode); + } + flags_out: mutex_unlock(&inode->i_mutex); mnt_drop_write_file(filp); |