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  1. 20 11月, 2014 1 次提交
    • C
      f2fs: introduce struct inode_management to wrap inner fields · 67298804
      由 Chao Yu 提交于 
      Now in f2fs, we have three inode cache: ORPHAN_INO, APPEND_INO, UPDATE_INO,
and we manage fields related to inode cache separately in struct f2fs_sb_info
for each inode cache type.
This makes codes a bit messy, so that this patch intorduce a new struct
inode_management to wrap inner fields as following which make codes more neat.

/* for inner inode cache management */
struct inode_management {
	struct radix_tree_root ino_root;	/* ino entry array */
	spinlock_t ino_lock;			/* for ino entry lock */
	struct list_head ino_list;		/* inode list head */
	unsigned long ino_num;			/* number of entries */
};

struct f2fs_sb_info {
	...
	struct inode_management im[MAX_INO_ENTRY];      /* manage inode cache */
	...
}
Signed-off-by: NChao Yu <chao2.yu@samsung.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>
      67298804
  3. 07 11月, 2014 1 次提交
  5. 04 11月, 2014 1 次提交
  7. 01 10月, 2014 1 次提交
    • J
      f2fs: check the use of macros on block counts and addresses · 7cd8558b
      由 Jaegeuk Kim 提交于 
      This patch cleans up the existing and new macros for readability.

Rule is like this.

         ,-----------------------------------------> MAX_BLKADDR -,
         |  ,------------- TOTAL_BLKS ----------------------------,
         |  |                                                     |
         |  ,- seg0_blkaddr   ,----- sit/nat/ssa/main blkaddress  |
block    |  | (SEG0_BLKADDR)  | | | |   (e.g., MAIN_BLKADDR)      |
address  0..x................ a b c d .............................
            |                                                     |
global seg# 0...................... m .............................
            |                       |                             |
            |                       `------- MAIN_SEGS -----------'
            `-------------- TOTAL_SEGS ---------------------------'
                                    |                             |
 seg#                               0..........xx..................

= Note =
 o GET_SEGNO_FROM_SEG0 : blk address -> global segno
 o GET_SEGNO           : blk address -> segno
 o START_BLOCK         : segno -> starting block address
Reviewed-by: NChao Yu <chao2.yu@samsung.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>
      7cd8558b
  9. 20 8月, 2014 1 次提交
  11. 29 7月, 2014 1 次提交
  13. 12 7月, 2014 1 次提交
  15. 20 3月, 2014 1 次提交
  17. 24 2月, 2014 1 次提交
  19. 17 2月, 2014 1 次提交
  21. 22 1月, 2014 2 次提交
  23. 20 1月, 2014 1 次提交
  25. 14 1月, 2014 1 次提交
  27. 06 1月, 2014 1 次提交
  29. 23 12月, 2013 2 次提交
  31. 30 7月, 2013 2 次提交
  33. 28 5月, 2013 1 次提交
  35. 30 4月, 2013 1 次提交
  37. 03 4月, 2013 2 次提交
    • J
      f2fs: change GC bitmaps to apply the section granularity · 5ec4e49f
      由 Jaegeuk Kim 提交于 
      This patch removes a bitmap for victim segments selected by foreground GC, and
modifies the other bitmap for victim segments selected by background GC.

1) foreground GC bitmap
 : We don't need to manage this, since we just only one previous victim section
   number instead of the whole victim history.
   The f2fs uses the victim section number in order not to allocate currently
   GC'ed section to current active logs.

2) background GC bitmap
 : This bitmap is used to avoid selecting victims repeatedly by background GCs.
   In addition, the victims are able to be selected by foreground GCs, since
   there is no need to read victim blocks during foreground GCs.

   By the fact that the foreground GC reclaims segments in a section unit, it'd
   be better to manage this bitmap based on the section granularity.
Reviewed-by: NNamjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: NJaegeuk Kim <jaegeuk.kim@samsung.com>
      5ec4e49f
    • J
      f2fs: introduce TOTAL_SECS macro · 53cf9522
      由 Jaegeuk Kim 提交于 
      Let's use a macro to get the total number of sections.
Reviewed-by: NNamjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: NJaegeuk Kim <jaegeuk.kim@samsung.com>
      53cf9522
  39. 12 2月, 2013 1 次提交
  41. 15 1月, 2013 2 次提交
    • N
      f2fs: fix the debugfs entry creation path · 4589d25d
      由 Namjae Jeon 提交于 
      As the "status" debugfs entry will be maintained for entire F2FS filesystem
irrespective of the number of partitions.
So, we can move the initialization to the init part of the f2fs and destroy will
be done from exit part. After making changes, for individual partition mount -
entry creation code will not be executed.
Signed-off-by: NJianpeng Ma <majianpeng@gmail.com>
Signed-off-by: NNamjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: NAmit Sahrawat <a.sahrawat@samsung.com>
Signed-off-by: NJaegeuk Kim <jaegeuk.kim@samsung.com>
      4589d25d
    • M
      f2fs: add global mutex_lock to protect f2fs_stat_list · 66af62ce
      由 majianpeng 提交于 
      There is an race condition between umounting f2fs and reading f2fs/status, which
results in oops.

Fox example:
Thread A			Thread B
umount f2fs 			cat f2fs/status

f2fs_destroy_stats() {		stat_show() {
				 list_for_each_entry_safe(&f2fs_stat_list)
 list_del(&si->stat_list);
 mutex_lock(&si->stat_lock);
 si->sbi = NULL;
 mutex_unlock(&si->stat_lock);
 kfree(sbi->stat_info);
} 				 mutex_lock(&si->stat_lock) <- si is gone.
				 ...
				}

Solution with a global lock: f2fs_stat_mutex:
Thread A			Thread B
umount f2fs 			cat f2fs/status

f2fs_destroy_stats() {		stat_show() {
 mutex_lock(&f2fs_stat_mutex);
 list_del(&si->stat_list);
 mutex_unlock(&f2fs_stat_mutex);
 kfree(sbi->stat_info);		 mutex_lock(&f2fs_stat_mutex);
}				 list_for_each_entry_safe(&f2fs_stat_list)
				 ...
				 mutex_unlock(&f2fs_stat_mutex);
				}
Signed-off-by: NJianpeng Ma <majianpeng@gmail.com>
[jaegeuk.kim@samsung.com: fix typos, description, and remove the existing lock]
Signed-off-by: NJaegeuk Kim <jaegeuk.kim@samsung.com>
      66af62ce
  43. 04 1月, 2013 1 次提交
  45. 11 12月, 2012 3 次提交