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author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-14 12:59:42 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-14 12:59:42 -0800 |
commit | ae9a8c4bdc91202b4236372eed53c54d2297c71b (patch) | |
tree | 4596680ee808334d246ad2f93bdd743d76c3741a /fs/ext4/ioctl.c | |
parent | 32190f0afbf4f1c0a9142e5a886a078ee0b794fd (diff) | |
parent | 232530680290ba94ca37852ab10d9556ea28badf (diff) | |
download | talos-op-linux-ae9a8c4bdc91202b4236372eed53c54d2297c71b.tar.gz talos-op-linux-ae9a8c4bdc91202b4236372eed53c54d2297c71b.zip |
Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 updates from Ted Ts'o:
- Add support for online resizing of file systems with bigalloc
- Fix a two data corruption bugs involving DAX, as well as a corruption
bug after a crash during a racing fallocate and delayed allocation.
- Finally, a number of cleanups and optimizations.
* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: improve smp scalability for inode generation
ext4: add support for online resizing with bigalloc
ext4: mention noload when recovering on read-only device
Documentation: fix little inconsistencies
ext4: convert timers to use timer_setup()
jbd2: convert timers to use timer_setup()
ext4: remove duplicate extended attributes defs
ext4: add ext4_should_use_dax()
ext4: add sanity check for encryption + DAX
ext4: prevent data corruption with journaling + DAX
ext4: prevent data corruption with inline data + DAX
ext4: fix interaction between i_size, fallocate, and delalloc after a crash
ext4: retry allocations conservatively
ext4: Switch to iomap for SEEK_HOLE / SEEK_DATA
ext4: Add iomap support for inline data
iomap: Add IOMAP_F_DATA_INLINE flag
iomap: Switch from blkno to disk offset
Diffstat (limited to 'fs/ext4/ioctl.c')
-rw-r--r-- | fs/ext4/ioctl.c | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c index 75d83471f65c..b7558f292420 100644 --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -15,6 +15,7 @@ #include <linux/mount.h> #include <linux/file.h> #include <linux/quotaops.h> +#include <linux/random.h> #include <linux/uuid.h> #include <linux/uaccess.h> #include <linux/delay.h> @@ -99,7 +100,6 @@ static long swap_inode_boot_loader(struct super_block *sb, int err; struct inode *inode_bl; struct ext4_inode_info *ei_bl; - struct ext4_sb_info *sbi = EXT4_SB(sb); if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode)) return -EINVAL; @@ -158,10 +158,8 @@ static long swap_inode_boot_loader(struct super_block *sb, inode->i_ctime = inode_bl->i_ctime = current_time(inode); - spin_lock(&sbi->s_next_gen_lock); - inode->i_generation = sbi->s_next_generation++; - inode_bl->i_generation = sbi->s_next_generation++; - spin_unlock(&sbi->s_next_gen_lock); + inode->i_generation = prandom_u32(); + inode_bl->i_generation = prandom_u32(); ext4_discard_preallocations(inode); @@ -291,10 +289,20 @@ flags_err: if (err) goto flags_out; - if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) + if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { + /* + * Changes to the journaling mode can cause unsafe changes to + * S_DAX if we are using the DAX mount option. + */ + if (test_opt(inode->i_sb, DAX)) { + err = -EBUSY; + goto flags_out; + } + err = ext4_change_inode_journal_flag(inode, jflag); - if (err) - goto flags_out; + if (err) + goto flags_out; + } if (migrate) { if (flags & EXT4_EXTENTS_FL) err = ext4_ext_migrate(inode); @@ -862,12 +870,6 @@ group_add_out: int err = 0, err2 = 0; ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; - if (ext4_has_feature_bigalloc(sb)) { - ext4_msg(sb, KERN_ERR, - "Online resizing not (yet) supported with bigalloc"); - return -EOPNOTSUPP; - } - if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, sizeof(__u64))) { return -EFAULT; |