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| author |   Jaegeuk Kim <jaegeuk@kernel.org> | 2019-10-18 10:06:40 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2019-11-07 10:40:59 -0800 |
| commit | f5a53edcf01eae21dc3ef1845515229e8459e5cc (patch) | |
| tree | bd7e880c73aad8ae2afb9105c226902632399593 /fs/f2fs/file.c | |
| parent | f2fs: avoid kernel panic on corruption test (diff) | |
| download | linux-dev-f5a53edcf01eae21dc3ef1845515229e8459e5cc.tar.xz linux-dev-f5a53edcf01eae21dc3ef1845515229e8459e5cc.zip | |
f2fs: support aligned pinned file
This patch supports 2MB-aligned pinned file, which can guarantee no GC at all
by allocating fully valid 2MB segment.
Check free segments by has_not_enough_free_secs() with large budget.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/file.c')
| -rw-r--r-- | fs/f2fs/file.c | 42 |
1 files changed, 37 insertions, 5 deletions
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 29bc0a542759..c31a5bbc8090 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -1545,12 +1545,44 @@ static int expand_inode_data(struct inode *inode, loff_t offset, if (off_end) map.m_len++; - if (f2fs_is_pinned_file(inode)) - map.m_seg_type = CURSEG_COLD_DATA; + if (!map.m_len) + return 0; + + if (f2fs_is_pinned_file(inode)) { + block_t len = (map.m_len >> sbi->log_blocks_per_seg) << + sbi->log_blocks_per_seg; + block_t done = 0; + + if (map.m_len % sbi->blocks_per_seg) + len += sbi->blocks_per_seg; + + map.m_len = sbi->blocks_per_seg; +next_alloc: + if (has_not_enough_free_secs(sbi, 0, + GET_SEC_FROM_SEG(sbi, overprovision_segments(sbi)))) { + mutex_lock(&sbi->gc_mutex); + err = f2fs_gc(sbi, true, false, NULL_SEGNO); + if (err && err != -ENODATA && err != -EAGAIN) + goto out_err; + } - err = f2fs_map_blocks(inode, &map, 1, (f2fs_is_pinned_file(inode) ? - F2FS_GET_BLOCK_PRE_DIO : - F2FS_GET_BLOCK_PRE_AIO)); + down_write(&sbi->pin_sem); + map.m_seg_type = CURSEG_COLD_DATA_PINNED; + f2fs_allocate_new_segments(sbi, CURSEG_COLD_DATA); + err = f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_DIO); + up_write(&sbi->pin_sem); + + done += map.m_len; + len -= map.m_len; + map.m_lblk += map.m_len; + if (!err && len) + goto next_alloc; + + map.m_len = done; + } else { + err = f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO); + } +out_err: if (err) { pgoff_t last_off; |