linux-toradex.git/fs/ext4/resize.c, branch v3.2.25

ext4: fix overhead calculation used by ext4_statfs()

2012-08-02T13:37:45+00:00

commit 952fc18ef9ec707ebdc16c0786ec360295e5ff15 upstream.

Commit f975d6bcc7a introduced bug which caused ext4_statfs() to
miscalculate the number of file system overhead blocks.  This causes
the f_blocks field in the statfs structure to be larger than it should
be.  This would in turn cause the "df" output to show the number of
data blocks in the file system and the number of data blocks used to
be larger than they should be.

Signed-off-by: "Theodore Ts'o" 
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings

ext4: Rename ext4_free_blks_{count,set}() to refer to clusters

2011-09-09T23:08:51+00:00

The field bg_free_blocks_count_{lo,high} in the block group
descriptor has been repurposed to hold the number of free clusters for
bigalloc functions.  So rename the functions so it makes it easier to
read and audit the block allocation and block freeing code.

Note: at this point in bigalloc development we doesn't support
online resize, so this also makes it really obvious all of the places
we need to fix up to add support for online resize.

Signed-off-by: "Theodore Ts'o"

ext4: convert the free_blocks field in s_flex_groups to be free_clusters

2011-09-09T22:58:51+00:00

Convert the free_blocks to be free_clusters to make the final revised
bigalloc changes easier to read/understand.

Signed-off-by: "Theodore Ts'o"

ext4: convert s_{dirty,free}blocks_counter to s_{dirty,free}clusters_counter

2011-09-09T22:56:51+00:00

Convert the percpu counters s_dirtyblocks_counter and
s_freeblocks_counter in struct ext4_super_info to be
s_dirtyclusters_counter and s_freeclusters_counter.

Signed-off-by: "Theodore Ts'o"

ext4: use ext4_kvzalloc()/ext4_kvmalloc() for s_group_desc and s_group_info

2011-08-01T12:45:38+00:00

Signed-off-by: "Theodore Ts'o"

ext4: add missing kfree() on error return path in add_new_gdb()

2011-07-30T16:58:41+00:00

We added some more error handling in b40971426a "ext4: add error
checking to calls to ext4_handle_dirty_metadata()".  But we need to
call kfree() as well to avoid a memory leak.

Signed-off-by: Dan Carpenter 
Signed-off-by: "Theodore Ts'o"

ext4: simplify parameters of reserve_backup_gdb()

2011-07-28T01:23:13+00:00

The reserve_backup_gdb() function only needs the block group number;
there's no need to pass a pointer to struct ext4_new_group_data to it.

Signed-off-by: Yongqiang Yang

ext4: simplify parameters of add_new_gdb()

2011-07-28T01:16:33+00:00

add_new_gdb() only needs the block group number; there is no need to
pass a pointer to struct ext4_new_group_data to add_new_gdb().
Instead of filling in a pointer the struct buffer_head in
add_new_gdb(), it's simpler to have the caller fetch it from the
s_group_desc[] array.

[Fixed error path to handle the case where struct buffer_head *primary
 hasn't been set yet. -- Ted]

Signed-off-by: Yongqiang Yang 
Signed-off-by: "Theodore Ts'o"

ext4: remove lock_buffer in bclean() and setup_new_group_blocks()

2011-07-28T00:40:18+00:00

There is no need to lock the buffers since no one else should be
touching these buffers besides the file system.

Signed-off-by: Yongqiang Yang 
Signed-off-by: "Theodore Ts'o"

ext4: simplify journal handling in setup_new_group_blocks()

2011-07-27T02:24:41+00:00

This patch simplifies journal handling in setup_new_group_blocks().

In previous code, block bitmap is modified everywhere in
setup_new_group_blocks(), ext4_get_write_access() in
extend_or_restart_transaction() is used to guarantee that the block
bitmap stays in the new handle, this makes things complicated.

The previous commit changed things so that the modifications on the
block bitmap are batched and done by ext4_set_bits() at the end of the
for loop.  This allows us to simplify things.

Signed-off-by: Yongqiang Yang 
Signed-off-by: "Theodore Ts'o"