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| author | Theodore Ts'o <tytso@mit.edu> | 2014-03-24 14:09:06 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2014-03-24 14:09:06 -0400 |
| commit | ed3654eb981fd44694b4d2a636e13f998bc10e7f (patch) | |
| tree | 133c6cd3044dc9aa628065550b873ba86d79c2f3 /fs | |
| parent | c4f65706056e9f0c2cf126b29c6920a179d91150 (diff) | |
| download | op-kernel-dev-ed3654eb981fd44694b4d2a636e13f998bc10e7f.zip op-kernel-dev-ed3654eb981fd44694b4d2a636e13f998bc10e7f.tar.gz | |
ext4: optimize Hurd tests when reading/writing inodes
Set a in-memory superblock flag to indicate whether the file system is
designed to support the Hurd.
Also, add a sanity check to make sure the 64-bit feature is not set
for Hurd file systems, since i_file_acl_high conflicts with a
Hurd-specific field.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ext4/ext4.h | 2 | ||||
| -rw-r--r-- | fs/ext4/inode.c | 9 | ||||
| -rw-r--r-- | fs/ext4/super.c | 10 |
3 files changed, 15 insertions, 6 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index f4f889e..e01135d 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -1001,6 +1001,8 @@ struct ext4_inode_info { #define EXT4_MOUNT2_STD_GROUP_SIZE 0x00000002 /* We have standard group size of blocksize * 8 blocks */ +#define EXT4_MOUNT2_HURD_COMPAT 0x00000004 /* Support HURD-castrated + file systems */ #define clear_opt(sb, opt) EXT4_SB(sb)->s_mount_opt &= \ ~EXT4_MOUNT_##opt diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index ed2c13a..b5e182a 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -4168,8 +4168,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino) EXT4_INODE_GET_XTIME(i_atime, inode, raw_inode); EXT4_EINODE_GET_XTIME(i_crtime, ei, raw_inode); - if (EXT4_SB(inode->i_sb)->s_es->s_creator_os != - cpu_to_le32(EXT4_OS_HURD)) { + if (likely(!test_opt2(inode->i_sb, HURD_COMPAT))) { inode->i_version = le32_to_cpu(raw_inode->i_disk_version); if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE) { if (EXT4_FITS_IN_INODE(raw_inode, ei, i_version_hi)) @@ -4345,8 +4344,7 @@ static int ext4_do_update_inode(handle_t *handle, goto out_brelse; raw_inode->i_dtime = cpu_to_le32(ei->i_dtime); raw_inode->i_flags = cpu_to_le32(ei->i_flags & 0xFFFFFFFF); - if (EXT4_SB(inode->i_sb)->s_es->s_creator_os != - cpu_to_le32(EXT4_OS_HURD)) + if (likely(!test_opt2(inode->i_sb, HURD_COMPAT))) raw_inode->i_file_acl_high = cpu_to_le16(ei->i_file_acl >> 32); raw_inode->i_file_acl_lo = cpu_to_le32(ei->i_file_acl); @@ -4391,8 +4389,7 @@ static int ext4_do_update_inode(handle_t *handle, raw_inode->i_block[block] = ei->i_data[block]; } - if (EXT4_SB(inode->i_sb)->s_es->s_creator_os != - cpu_to_le32(EXT4_OS_HURD)) { + if (likely(!test_opt2(inode->i_sb, HURD_COMPAT))) { raw_inode->i_disk_version = cpu_to_le32(inode->i_version); if (ei->i_extra_isize) { if (EXT4_FITS_IN_INODE(raw_inode, ei, i_version_hi)) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 5a51af7..f3c6670 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -3580,6 +3580,16 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) "feature flags set on rev 0 fs, " "running e2fsck is recommended"); + if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { + set_opt2(sb, HURD_COMPAT); + if (EXT4_HAS_INCOMPAT_FEATURE(sb, + EXT4_FEATURE_INCOMPAT_64BIT)) { + ext4_msg(sb, KERN_ERR, + "The Hurd can't support 64-bit file systems"); + goto failed_mount; + } + } + if (IS_EXT2_SB(sb)) { if (ext2_feature_set_ok(sb)) ext4_msg(sb, KERN_INFO, "mounting ext2 file system " |
