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d624c96fb3
This adds roll-forward routines to recover fsynced data. - F2FS uses basically roll-back model with checkpointing. - In order to implement fsync(), there are two approaches as follows. 1. A roll-back model with checkpointing at every fsync() : This is a naive method, but suffers from very low performance. 2. A roll-forward model : F2FS adopts this model where all the fsynced data should be recovered, which were written after checkpointing was done. In order to figure out the data, F2FS keeps a "fsync" mark in direct node blocks. In addition, F2FS remains the location of next node block in each direct node block for reconstructing the chain of node blocks during the recovery. - In order to enhance the performance, F2FS keeps a "dentry" mark also in direct node blocks. If this is set during the recovery, F2FS replays adding a dentry. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com> |
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| .. | ||
| acl.c | ||
| acl.h | ||
| checkpoint.c | ||
| data.c | ||
| dir.c | ||
| f2fs.h | ||
| file.c | ||
| gc.c | ||
| gc.h | ||
| hash.c | ||
| inode.c | ||
| namei.c | ||
| node.c | ||
| node.h | ||
| recovery.c | ||
| segment.c | ||
| segment.h | ||
| super.c | ||
| xattr.c | ||
| xattr.h | ||