diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/Kconfig | 7 | ||||
| -rw-r--r-- | fs/ext2/super.c | 7 | ||||
| -rw-r--r-- | fs/ext4/super.c | 9 |
3 files changed, 18 insertions, 5 deletions
diff --git a/fs/Kconfig b/fs/Kconfig index 9774588da60e..bc821a86d965 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -58,6 +58,13 @@ config FS_DAX_PMD depends on ZONE_DEVICE depends on TRANSPARENT_HUGEPAGE +# Selected by DAX drivers that do not expect filesystem DAX to support +# get_user_pages() of DAX mappings. I.e. "limited" indicates no support +# for fork() of processes with MAP_SHARED mappings or support for +# direct-I/O to a DAX mapping. +config FS_DAX_LIMITED + bool + endif # BLOCK # Posix ACL utility routines diff --git a/fs/ext2/super.c b/fs/ext2/super.c index db5f9daa7780..0a638e79bf7c 100644 --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -962,8 +962,11 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) if (sbi->s_mount_opt & EXT2_MOUNT_DAX) { err = bdev_dax_supported(sb, blocksize); - if (err) - goto failed_mount; + if (err) { + ext2_msg(sb, KERN_ERR, + "DAX unsupported by block device. Turning off DAX."); + sbi->s_mount_opt &= ~EXT2_MOUNT_DAX; + } } /* If the blocksize doesn't match, re-read the thing.. */ diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 421222ec3509..39bf464c35f1 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -3712,11 +3712,14 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) if (ext4_has_feature_inline_data(sb)) { ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" " that may contain inline data"); - goto failed_mount; + sbi->s_mount_opt &= ~EXT4_MOUNT_DAX; } err = bdev_dax_supported(sb, blocksize); - if (err) - goto failed_mount; + if (err) { + ext4_msg(sb, KERN_ERR, + "DAX unsupported by block device. Turning off DAX."); + sbi->s_mount_opt &= ~EXT4_MOUNT_DAX; + } } if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { |