linux.git/fs/f2fs/node.c, branch v4.5

f2fs: fix wrong memory condition check

2016-01-11T23:56:43+00:00

This patch fixes wrong decision for avaliable_free_memory.
The return valus is already set as false, so we should consider true condition
below only.

Signed-off-by: Jaegeuk Kim

f2fs: avoid unnecessary f2fs_balance_fs calls

2016-01-08T19:45:22+00:00

Only when node page is newly dirtied, it needs to check whether we need to do
f2fs_gc.

Signed-off-by: Jaegeuk Kim

f2fs: introduce __get_node_page to reuse common code

2016-01-08T19:45:20+00:00

There are duplicated code in between get_node_page and get_node_page_ra,
introduce __get_node_page to includes common parts of these two, and
export get_node_page and get_node_page_ra by reusing __get_node_page.

Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: check node id earily when readaheading node page

2016-01-08T19:45:16+00:00

Add node id check in ra_node_page and get_node_page_ra like get_node_page.

Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

Revert "f2fs: check the node block address of newly allocated nid"

2016-01-07T03:15:49+00:00

Original issue is fixed by:

  f2fs: cover more area with nat_tree_lock

This reverts commit 24928634f81b1592e83b37dcd89ed45c28f12feb.

f2fs: cover more area with nat_tree_lock

2016-01-07T03:15:48+00:00

There was a subtle bug on nat cache management which incurs wrong nid allocation
or wrong block addresses when try_to_free_nats is triggered heavily.
This patch enlarges the previous coverage of nat_tree_lock to avoid data race.

Signed-off-by: Jaegeuk Kim

f2fs: write pending bios when cp_error is set

2015-12-31T21:08:02+00:00

When testing ioc_shutdown, put_super is able to be hanged by waiting for
writebacking pages as follows.

INFO: task umount:2723 blocked for more than 120 seconds.
      Tainted: G           O    4.4.0-rc3+ #8
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
umount          D ffff88000859f9d8     0  2723   2110 0x00000000
 ffff88000859f9d8 0000000000000000 0000000000000000 ffffffff81e11540
 ffff880078c225c0 ffff8800085a0000 ffff88007fc17440 7fffffffffffffff
 ffffffff818239f0 ffff88000859fb48 ffff88000859f9f0 ffffffff8182310c
Call Trace:
 [] ? bit_wait+0x50/0x50
 [] schedule+0x3c/0x90
 [] schedule_timeout+0x2d9/0x430
 [] ? mark_held_locks+0x6f/0xa0
 [] ? ktime_get+0x7d/0x140
 [] ? bit_wait+0x50/0x50
 [] ? kvm_clock_get_cycles+0x25/0x30
 [] ? ktime_get+0xac/0x140
 [] ? bit_wait+0x50/0x50
 [] io_schedule_timeout+0xa4/0x110
 [] bit_wait_io+0x35/0x50
 [] __wait_on_bit+0x5d/0x90
 [] wait_on_page_bit+0xcb/0xf0
 [] ? autoremove_wake_function+0x40/0x40
 [] truncate_inode_pages_range+0x4bc/0x840
 [] truncate_inode_pages_final+0x4d/0x60
 [] f2fs_evict_inode+0x75/0x400 [f2fs]
 [] evict+0xbc/0x190
 [] iput+0x229/0x2c0
 [] f2fs_put_super+0x105/0x1a0 [f2fs]
 [] generic_shutdown_super+0x6a/0xf0
 [] kill_block_super+0x27/0x70
 [] kill_f2fs_super+0x20/0x30 [f2fs]
 [] deactivate_locked_super+0x43/0x70
 [] deactivate_super+0x5c/0x60
 [] cleanup_mnt+0x3f/0x90
 [] __cleanup_mnt+0x12/0x20
 [] task_work_run+0x73/0xa0
 [] exit_to_usermode_loop+0xcc/0xd0
 [] syscall_return_slowpath+0xcc/0xe0
 [] int_ret_from_sys_call+0x25/0x9f

Signed-off-by: Jaegeuk Kim

f2fs: let user being aware of IO error

2015-12-30T18:14:15+00:00

Sometimes we keep dumb when IO error occur in lower layer device, so user
will not receive any error return value for some operation, but actually,
the operation did not succeed.

This sould be avoided, so this patch reports such kind of error to user.

Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: return early when trying to read null nid

2015-12-30T18:14:12+00:00

If get_node_page() gets zero nid, we can return early without getting a wrong
page. For example, get_dnode_of_data() can try to do that.

Signed-off-by: Jaegeuk Kim

f2fs: record node block allocation in dnode_of_data

2015-12-30T18:14:07+00:00

This patch introduces recording node block allocation in dnode_of_data.
This information helps to figure out whether any node block is allocated during
specific file operations.

Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim