diff options
Diffstat (limited to 'fs/ext4/super.c')
| -rw-r--r-- | fs/ext4/super.c | 50 |
1 files changed, 48 insertions, 2 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index b806e689c4a..6dcbb28dc06 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -36,6 +36,7 @@ #include <linux/namei.h> #include <linux/quotaops.h> #include <linux/seq_file.h> +#include <linux/log2.h> #include <asm/uaccess.h> @@ -734,7 +735,7 @@ enum { Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, - Opt_grpquota, Opt_extents, + Opt_grpquota, Opt_extents, Opt_noextents, }; static match_table_t tokens = { @@ -785,6 +786,7 @@ static match_table_t tokens = { {Opt_usrquota, "usrquota"}, {Opt_barrier, "barrier=%u"}, {Opt_extents, "extents"}, + {Opt_noextents, "noextents"}, {Opt_err, NULL}, {Opt_resize, "resize"}, }; @@ -1120,6 +1122,9 @@ clear_qf_name: case Opt_extents: set_opt (sbi->s_mount_opt, EXTENTS); break; + case Opt_noextents: + clear_opt (sbi->s_mount_opt, EXTENTS); + break; default: printk (KERN_ERR "EXT4-fs: Unrecognized mount option \"%s\" " @@ -1551,6 +1556,12 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent) set_opt(sbi->s_mount_opt, RESERVATION); + /* + * turn on extents feature by default in ext4 filesystem + * User -o noextents to turn it off + */ + set_opt(sbi->s_mount_opt, EXTENTS); + if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum, NULL, 0)) goto failed_mount; @@ -1634,13 +1645,15 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent) sbi->s_inode_size = le16_to_cpu(es->s_inode_size); sbi->s_first_ino = le32_to_cpu(es->s_first_ino); if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || - (sbi->s_inode_size & (sbi->s_inode_size - 1)) || + (!is_power_of_2(sbi->s_inode_size)) || (sbi->s_inode_size > blocksize)) { printk (KERN_ERR "EXT4-fs: unsupported inode size: %d\n", sbi->s_inode_size); goto failed_mount; } + if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) + sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); } sbi->s_frag_size = EXT4_MIN_FRAG_SIZE << le32_to_cpu(es->s_log_frag_size); @@ -1803,6 +1816,13 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent) goto failed_mount3; } + if (ext4_blocks_count(es) > 0xffffffffULL && + !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, + JBD2_FEATURE_INCOMPAT_64BIT)) { + printk(KERN_ERR "ext4: Failed to set 64-bit journal feature\n"); + goto failed_mount4; + } + /* We have now updated the journal if required, so we can * validate the data journaling mode. */ switch (test_opt(sb, DATA_FLAGS)) { @@ -1857,6 +1877,32 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent) } ext4_setup_super (sb, es, sb->s_flags & MS_RDONLY); + + /* determine the minimum size of new large inodes, if present */ + if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { + sbi->s_want_extra_isize = sizeof(struct ext4_inode) - + EXT4_GOOD_OLD_INODE_SIZE; + if (EXT4_HAS_RO_COMPAT_FEATURE(sb, + EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { + if (sbi->s_want_extra_isize < + le16_to_cpu(es->s_want_extra_isize)) + sbi->s_want_extra_isize = + le16_to_cpu(es->s_want_extra_isize); + if (sbi->s_want_extra_isize < + le16_to_cpu(es->s_min_extra_isize)) + sbi->s_want_extra_isize = + le16_to_cpu(es->s_min_extra_isize); + } + } + /* Check if enough inode space is available */ + if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > + sbi->s_inode_size) { + sbi->s_want_extra_isize = sizeof(struct ext4_inode) - + EXT4_GOOD_OLD_INODE_SIZE; + printk(KERN_INFO "EXT4-fs: required extra inode space not" + "available.\n"); + } + /* * akpm: core read_super() calls in here with the superblock locked. * That deadlocks, because orphan cleanup needs to lock the superblock |