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| author | Theodore Ts'o <tytso@mit.edu> | 2011-09-03 18:22:38 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2011-09-03 18:22:38 -0400 |
| commit | 56889787cfa77dfd96f0b3a3e6a4f26c2e4a5134 (patch) | |
| tree | 5fb1be2d593fae0bb1a566397c58dc4f7ce010f2 /fs/ext4/ext4.h | |
| parent | 2be4751b21ae1cacb002da48cfc5bf6743fee8c1 (diff) | |
| download | linux-3.10-56889787cfa77dfd96f0b3a3e6a4f26c2e4a5134.tar.gz linux-3.10-56889787cfa77dfd96f0b3a3e6a4f26c2e4a5134.tar.bz2 linux-3.10-56889787cfa77dfd96f0b3a3e6a4f26c2e4a5134.zip | |
ext4: improve handling of conflicting mount options
If the user explicitly specifies conflicting mount options for
delalloc or dioread_nolock and data=journal, fail the mount, instead
of printing a warning and continuing (since many user's won't look at
dmesg and notice the warning).
Also, print a single warning that data=journal implies that delayed
allocation is not on by default (since it's not supported), and
furthermore that O_DIRECT is not supported. Improve the text in
Documentation/filesystems/ext4.txt so this is clear there as well.
Similarly, if the dioread_nolock mount option is specified when the
file system block size != PAGE_SIZE, fail the mount instead of
printing a warning message and ignoring the mount option.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/ext4.h')
| -rw-r--r-- | fs/ext4/ext4.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index ccfa81f33bb..48ae98819d3 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -922,6 +922,9 @@ struct ext4_inode_info { #define EXT4_MOUNT_DISCARD 0x40000000 /* Issue DISCARD requests */ #define EXT4_MOUNT_INIT_INODE_TABLE 0x80000000 /* Initialize uninitialized itables */ +#define EXT4_MOUNT2_EXPLICIT_DELALLOC 0x00000001 /* User explicitly + specified delalloc */ + #define clear_opt(sb, opt) EXT4_SB(sb)->s_mount_opt &= \ ~EXT4_MOUNT_##opt #define set_opt(sb, opt) EXT4_SB(sb)->s_mount_opt |= \ |