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Date: Tue, 10 Dec 2013 13:06:31 -0800
From: "Darrick J. Wong" <darrick.wong@...cle.com>
To: Zheng Liu <gnehzuil.liu@...il.com>
Cc: linux-ext4@...r.kernel.org, "Theodore Ts'o" <tytso@....edu>,
Zheng Liu <wenqing.lz@...bao.com>
Subject: Re: [PATCH v3 22/30] tune2fs: add inline_data feature in tune2fs
On Fri, Dec 06, 2013 at 05:58:09PM +0800, Zheng Liu wrote:
> From: Zheng Liu <wenqing.lz@...bao.com>
>
> This commit make us switch on/off inline_data feature in tune2fs. Now
> inline_data can be enabled without ext_attr. Hence we don't check it.
> As doing in mke2fs we need to check inode size when we want to enable
> it.
>
> Signed-off-by: Theodore Ts'o <tytso@....edu>
> Signed-off-by: Zheng Liu <wenqing.lz@...bao.com>
> ---
> misc/tune2fs.8.in | 3 ++
> misc/tune2fs.c | 96 +++++++++++++++++++++++++++++++++++++++++++++++++++--
> 2 files changed, 97 insertions(+), 2 deletions(-)
>
> diff --git a/misc/tune2fs.8.in b/misc/tune2fs.8.in
> index 55c6dd9..8d56cdd 100644
> --- a/misc/tune2fs.8.in
> +++ b/misc/tune2fs.8.in
> @@ -531,6 +531,9 @@ Setting the filesystem feature is equivalent to using the
> .B \-j
> option.
> .TP
> +.B inline_data
> +Allow data to be stored in the inode and extended attribute area.
> +.TP
> .B large_file
> Filesystem can contain files that are greater than 2GB. (Modern kernels
> set this feature automatically when a file > 2GB is created.)
> diff --git a/misc/tune2fs.c b/misc/tune2fs.c
> index 95c1886..d205df5 100644
> --- a/misc/tune2fs.c
> +++ b/misc/tune2fs.c
> @@ -92,6 +92,7 @@ static unsigned long new_inode_size;
> static char *ext_mount_opts;
> static int usrquota, grpquota;
> static int rewrite_checksums;
> +static int disable_inline_data;
>
> int journal_size, journal_flags;
> char *journal_device;
> @@ -140,7 +141,8 @@ static __u32 ok_features[3] = {
> EXT2_FEATURE_INCOMPAT_FILETYPE |
> EXT3_FEATURE_INCOMPAT_EXTENTS |
> EXT4_FEATURE_INCOMPAT_FLEX_BG |
> - EXT4_FEATURE_INCOMPAT_MMP,
> + EXT4_FEATURE_INCOMPAT_MMP |
> + EXT4_FEATURE_INCOMPAT_INLINE_DATA,
> /* R/O compat */
> EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
> EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
> @@ -162,7 +164,8 @@ static __u32 clear_ok_features[3] = {
> /* Incompat */
> EXT2_FEATURE_INCOMPAT_FILETYPE |
> EXT4_FEATURE_INCOMPAT_FLEX_BG |
> - EXT4_FEATURE_INCOMPAT_MMP,
> + EXT4_FEATURE_INCOMPAT_MMP |
> + EXT4_FEATURE_INCOMPAT_INLINE_DATA,
> /* R/O compat */
> EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
> EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
> @@ -745,6 +748,68 @@ static void rewrite_metadata_checksums(ext2_filsys fs)
> ext2fs_mark_super_dirty(fs);
> }
>
> +/*
> + * Allocate a block for all inodes with inline data.
> + */
> +static void expand_inodes(ext2_filsys fs)
> +{
> + int inode_size = EXT2_INODE_SIZE(fs->super);
> + struct ext2_inode *inode;
> + ext2_inode_scan scan;
> + errcode_t retval;
> + ext2_ino_t ino;
> +
> + retval = ext2fs_open_inode_scan(fs, 0, &scan);
> + if (retval) {
> + com_err("expand_inline_data", retval,
> + "while opening inode scan");
> + exit(1);
> + }
> +
> + retval = ext2fs_get_mem(inode_size, &inode);
> + if (retval) {
> + com_err("expand_inline_data", retval,
> + "while allocating memory");
> + exit(1);
> + }
> +
> + do {
> + retval = ext2fs_get_next_inode_full(scan, &ino, inode,
> + inode_size);
> + if (retval) {
> + com_err("expand_inline_data", retval,
> + "while getting next inode");
> + exit(1);
> + }
> + if (!ino)
> + break;
> + if (!ext2fs_test_inode_bitmap2(fs->inode_map, ino))
> + continue;
> + if (!(inode->i_flags & EXT4_INLINE_DATA_FL))
> + continue;
> + retval = ext2fs_inline_data_expand(fs, ino);
> + if (retval) {
> + com_err("expand_inline_data", retval,
> + "while expanding inode %lu", ino);
> + exit(1);
> + }
> + } while (ino);
> +
> + ext2fs_free_mem(&inode);
> + ext2fs_close_inode_scan(scan);
> +}
> +
> +static void expand_inline_data(ext2_filsys fs)
> +{
> + ext2fs_read_bitmaps(fs);
> + expand_inodes(fs);
> + ext2fs_mark_ib_dirty(fs);
> + ext2fs_mark_bb_dirty(fs);
> + ext2fs_mmp_update2(fs, 1);
> + fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
> + ext2fs_mark_super_dirty(fs);
> +}
> +
> static void enable_uninit_bg(ext2_filsys fs)
> {
> struct ext2_group_desc *gd;
> @@ -1083,6 +1148,31 @@ mmp_error:
> disable_uninit_bg(fs,
> EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
>
> + if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
> + EXT4_FEATURE_INCOMPAT_INLINE_DATA)) {
> + /*
> + * Check inode size. If inode size is 128, tell user that
> + * inline data is useless.
> + */
> + if (EXT2_INODE_SIZE(fs->super) == EXT2_GOOD_OLD_INODE_SIZE) {
> + fputs(_("The inode size is too small to "
> + "store inline data.\n"), stderr);
> + return 1;
> + }
> + }
> +
> + if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
> + EXT4_FEATURE_INCOMPAT_INLINE_DATA)) {
> + if (mount_flags & EXT2_MF_MOUNTED) {
> + fputs(_("The inline data feature can't be clear if "
"can't be cleared"
--D
> + "the filesystem is mounted\n"), stderr);
> + return 1;
> + }
> + if (check_fsck_needed(fs))
> + return 1;
> + disable_inline_data = 1;
> + }
> +
> if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
> EXT4_FEATURE_RO_COMPAT_QUOTA)) {
> /*
> @@ -2708,6 +2798,8 @@ retry_open:
> }
> if (rewrite_checksums)
> rewrite_metadata_checksums(fs);
> + if (disable_inline_data)
> + expand_inline_data(fs);
> if (I_flag) {
> if (mount_flags & EXT2_MF_MOUNTED) {
> fputs(_("The inode size may only be "
> --
> 1.7.9.7
>
> --
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