2007-10-09 16:06:20

by Aneesh Kumar K.V

[permalink] [raw]
Subject: [PATCH] ext4: Introduce ext4_inoblk_t

This patch adds a new data type ext4_inoblk_t to represent
the logical file blocks.

This is the preparatory patch to support large files in ext4
The follow up patch with convert the ext4_inode i_blocks to
represent the number of blocks in file system block size. This
changes makes it possible to have a block number 2**32 -1 which
will result in overflow if the block number is represented by
signed long. This patch convert all the block number to type
ext4_inoblk_t which is typedef to __u32

Signed-off-by: Aneesh Kumar K.V <[email protected]>
---
fs/ext4/extents.c | 170 ++++++++------------------------------
fs/ext4/inode.c | 25 +++---
fs/ext4/mballoc.c | 29 +++----
fs/ext4/migrate.c | 24 +++---
include/linux/ext4_fs.h | 20 +++--
include/linux/ext4_fs_extents.h | 25 ++-----
include/linux/ext4_fs_i.h | 5 +-
7 files changed, 96 insertions(+), 202 deletions(-)

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 0ea6122..c83c2ff 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -144,7 +144,7 @@ static int ext4_ext_dirty(handle_t *handle, struct inode *inode,

static ext4_fsblk_t ext4_ext_find_goal(struct inode *inode,
struct ext4_ext_path *path,
- ext4_fsblk_t block)
+ ext4_inoblk_t block)
{
struct ext4_inode_info *ei = EXT4_I(inode);
ext4_fsblk_t bg_start;
@@ -367,13 +367,14 @@ static void ext4_ext_drop_refs(struct ext4_ext_path *path)
* the header must be checked before calling this
*/
static void
-ext4_ext_binsearch_idx(struct inode *inode, struct ext4_ext_path *path, int block)
+ext4_ext_binsearch_idx(struct inode *inode,
+ struct ext4_ext_path *path, ext4_inoblk_t block)
{
struct ext4_extent_header *eh = path->p_hdr;
struct ext4_extent_idx *r, *l, *m;


- ext_debug("binsearch for %d(idx): ", block);
+ ext_debug("binsearch for %lu(idx): ", (unsigned long)block);

l = EXT_FIRST_INDEX(eh) + 1;
r = EXT_LAST_INDEX(eh);
@@ -425,7 +426,8 @@ ext4_ext_binsearch_idx(struct inode *inode, struct ext4_ext_path *path, int bloc
* the header must be checked before calling this
*/
static void
-ext4_ext_binsearch(struct inode *inode, struct ext4_ext_path *path, int block)
+ext4_ext_binsearch(struct inode *inode,
+ struct ext4_ext_path *path, ext4_inoblk_t block)
{
struct ext4_extent_header *eh = path->p_hdr;
struct ext4_extent *r, *l, *m;
@@ -438,7 +440,7 @@ ext4_ext_binsearch(struct inode *inode, struct ext4_ext_path *path, int block)
return;
}

- ext_debug("binsearch for %d: ", block);
+ ext_debug("binsearch for %lu: ", (unsigned long)block);

l = EXT_FIRST_EXTENT(eh) + 1;
r = EXT_LAST_EXTENT(eh);
@@ -494,7 +496,8 @@ int ext4_ext_tree_init(handle_t *handle, struct inode *inode)
}

struct ext4_ext_path *
-ext4_ext_find_extent(struct inode *inode, int block, struct ext4_ext_path *path)
+ext4_ext_find_extent(struct inode *inode, ext4_inoblk_t block,
+ struct ext4_ext_path *path)
{
struct ext4_extent_header *eh;
struct buffer_head *bh;
@@ -979,8 +982,8 @@ repeat:
/* refill path */
ext4_ext_drop_refs(path);
path = ext4_ext_find_extent(inode,
- le32_to_cpu(newext->ee_block),
- path);
+ (ext4_inoblk_t )le32_to_cpu(newext->ee_block),
+ path);
if (IS_ERR(path))
err = PTR_ERR(path);
} else {
@@ -992,8 +995,8 @@ repeat:
/* refill path */
ext4_ext_drop_refs(path);
path = ext4_ext_find_extent(inode,
- le32_to_cpu(newext->ee_block),
- path);
+ (ext4_inoblk_t)le32_to_cpu(newext->ee_block),
+ path);
if (IS_ERR(path)) {
err = PTR_ERR(path);
goto out;
@@ -1023,7 +1026,7 @@ out:
*/
int
ext4_ext_search_left(struct inode *inode, struct ext4_ext_path *path,
- ext4_fsblk_t *logical, ext4_fsblk_t *phys)
+ ext4_inoblk_t *logical, ext4_fsblk_t *phys)
{
struct ext4_extent_idx *ix;
struct ext4_extent *ex;
@@ -1066,7 +1069,7 @@ ext4_ext_search_left(struct inode *inode, struct ext4_ext_path *path,
*/
int
ext4_ext_search_right(struct inode *inode, struct ext4_ext_path *path,
- ext4_fsblk_t *logical, ext4_fsblk_t *phys)
+ ext4_inoblk_t *logical, ext4_fsblk_t *phys)
{
struct buffer_head *bh = NULL;
struct ext4_extent_header *eh;
@@ -1196,7 +1199,7 @@ ext4_ext_next_allocated_block(struct ext4_ext_path *path)
* ext4_ext_next_leaf_block:
* returns first allocated block from next leaf or EXT_MAX_BLOCK
*/
-static unsigned ext4_ext_next_leaf_block(struct inode *inode,
+static ext4_inoblk_t ext4_ext_next_leaf_block(struct inode *inode,
struct ext4_ext_path *path)
{
int depth;
@@ -1214,7 +1217,7 @@ static unsigned ext4_ext_next_leaf_block(struct inode *inode,
while (depth >= 0) {
if (path[depth].p_idx !=
EXT_LAST_INDEX(path[depth].p_hdr))
- return le32_to_cpu(path[depth].p_idx[1].ei_block);
+ return (ext4_inoblk_t)le32_to_cpu(path[depth].p_idx[1].ei_block);
depth--;
}

@@ -1432,7 +1435,8 @@ int ext4_ext_insert_extent(handle_t *handle, struct inode *inode,
struct ext4_extent *ex, *fex;
struct ext4_extent *nearex; /* nearest extent */
struct ext4_ext_path *npath = NULL;
- int depth, len, err, next;
+ int depth, len, err;
+ ext4_inoblk_t next;
unsigned uninitialized = 0;

BUG_ON(ext4_ext_get_actual_len(newext) == 0);
@@ -1577,114 +1581,8 @@ cleanup:
return err;
}

-int ext4_ext_walk_space(struct inode *inode, unsigned long block,
- unsigned long num, ext_prepare_callback func,
- void *cbdata)
-{
- struct ext4_ext_path *path = NULL;
- struct ext4_ext_cache cbex;
- struct ext4_extent *ex;
- unsigned long next, start = 0, end = 0;
- unsigned long last = block + num;
- int depth, exists, err = 0;
-
- BUG_ON(func == NULL);
- BUG_ON(inode == NULL);
-
- while (block < last && block != EXT_MAX_BLOCK) {
- num = last - block;
- /* find extent for this block */
- path = ext4_ext_find_extent(inode, block, path);
- if (IS_ERR(path)) {
- err = PTR_ERR(path);
- path = NULL;
- break;
- }
-
- depth = ext_depth(inode);
- BUG_ON(path[depth].p_hdr == NULL);
- ex = path[depth].p_ext;
- next = ext4_ext_next_allocated_block(path);
-
- exists = 0;
- if (!ex) {
- /* there is no extent yet, so try to allocate
- * all requested space */
- start = block;
- end = block + num;
- } else if (le32_to_cpu(ex->ee_block) > block) {
- /* need to allocate space before found extent */
- start = block;
- end = le32_to_cpu(ex->ee_block);
- if (block + num < end)
- end = block + num;
- } else if (block >= le32_to_cpu(ex->ee_block)
- + ext4_ext_get_actual_len(ex)) {
- /* need to allocate space after found extent */
- start = block;
- end = block + num;
- if (end >= next)
- end = next;
- } else if (block >= le32_to_cpu(ex->ee_block)) {
- /*
- * some part of requested space is covered
- * by found extent
- */
- start = block;
- end = le32_to_cpu(ex->ee_block)
- + ext4_ext_get_actual_len(ex);
- if (block + num < end)
- end = block + num;
- exists = 1;
- } else {
- BUG();
- }
- BUG_ON(end <= start);
-
- if (!exists) {
- cbex.ec_block = start;
- cbex.ec_len = end - start;
- cbex.ec_start = 0;
- cbex.ec_type = EXT4_EXT_CACHE_GAP;
- } else {
- cbex.ec_block = le32_to_cpu(ex->ee_block);
- cbex.ec_len = ext4_ext_get_actual_len(ex);
- cbex.ec_start = ext_pblock(ex);
- cbex.ec_type = EXT4_EXT_CACHE_EXTENT;
- }
-
- BUG_ON(cbex.ec_len == 0);
- err = func(inode, path, &cbex, cbdata);
- ext4_ext_drop_refs(path);
-
- if (err < 0)
- break;
- if (err == EXT_REPEAT)
- continue;
- else if (err == EXT_BREAK) {
- err = 0;
- break;
- }
-
- if (ext_depth(inode) != depth) {
- /* depth was changed. we have to realloc path */
- kfree(path);
- path = NULL;
- }
-
- block = cbex.ec_block + cbex.ec_len;
- }
-
- if (path) {
- ext4_ext_drop_refs(path);
- kfree(path);
- }
-
- return err;
-}
-
static void
-ext4_ext_put_in_cache(struct inode *inode, __u32 block,
+ext4_ext_put_in_cache(struct inode *inode, ext4_inoblk_t block,
__u32 len, ext4_fsblk_t start, int type)
{
struct ext4_ext_cache *cex;
@@ -1703,10 +1601,11 @@ ext4_ext_put_in_cache(struct inode *inode, __u32 block,
*/
static void
ext4_ext_put_gap_in_cache(struct inode *inode, struct ext4_ext_path *path,
- unsigned long block)
+ ext4_inoblk_t block)
{
int depth = ext_depth(inode);
- unsigned long lblock, len;
+ unsigned long len;
+ ext4_inoblk_t lblock;
struct ext4_extent *ex;

ex = path[depth].p_ext;
@@ -1743,7 +1642,7 @@ ext4_ext_put_gap_in_cache(struct inode *inode, struct ext4_ext_path *path,
}

static int
-ext4_ext_in_cache(struct inode *inode, unsigned long block,
+ext4_ext_in_cache(struct inode *inode, ext4_inoblk_t block,
struct ext4_extent *ex)
{
struct ext4_ext_cache *cex;
@@ -2238,9 +2137,9 @@ void ext4_ext_release(struct super_block *sb)
* b> Splits in two extents: Write is happening at either end of the extent
* c> Splits in three extents: Somone is writing in middle of the extent
*/
-int ext4_ext_convert_to_initialized(handle_t *handle, struct inode *inode,
+static int ext4_ext_convert_to_initialized(handle_t *handle, struct inode *inode,
struct ext4_ext_path *path,
- ext4_fsblk_t iblock,
+ ext4_inoblk_t iblock,
unsigned long max_blocks)
{
struct ext4_extent *ex, newex;
@@ -2374,7 +2273,7 @@ out:
* mutex_lock(&EXT4_I(inode)->truncate_mutex);
*/
int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
- ext4_fsblk_t iblock,
+ ext4_inoblk_t iblock,
unsigned long max_blocks, struct buffer_head *bh_result,
int create, int extend_disksize)
{
@@ -2387,8 +2286,9 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
struct ext4_allocation_request ar;

__clear_bit(BH_New, &bh_result->b_state);
- ext_debug("blocks %d/%lu requested for inode %u\n", (int) iblock,
- max_blocks, (unsigned) inode->i_ino);
+ ext_debug("blocks %lu/%lu requested for inode %u\n",
+ (unsigned long )iblock, max_blocks,
+ (unsigned) inode->i_ino);

/* check in cache */
goal = ext4_ext_in_cache(inode, iblock, &newex);
@@ -2436,7 +2336,7 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,

ex = path[depth].p_ext;
if (ex) {
- unsigned long ee_block = le32_to_cpu(ex->ee_block);
+ ext4_inoblk_t ee_block = le32_to_cpu(ex->ee_block);
ext4_fsblk_t ee_start = ext_pblock(ex);
unsigned short ee_len;

@@ -2686,7 +2586,8 @@ int ext4_ext_writepage_trans_blocks(struct inode *inode, int num)
long ext4_fallocate(struct inode *inode, int mode, loff_t offset, loff_t len)
{
handle_t *handle;
- ext4_fsblk_t block, max_blocks;
+ ext4_inoblk_t block;
+ unsigned long max_blocks;
ext4_fsblk_t nblocks = 0;
int ret = 0;
int ret2 = 0;
@@ -2731,8 +2632,9 @@ retry:
if (!ret) {
ext4_error(inode->i_sb, "ext4_fallocate",
"ext4_ext_get_blocks returned 0! inode#%lu"
- ", block=%llu, max_blocks=%llu",
- inode->i_ino, block, max_blocks);
+ ", block=%lu, max_blocks=%lu",
+ inode->i_ino, (unsigned long)block,
+ (unsigned long)max_blocks);
ret = -EIO;
ext4_mark_inode_dirty(handle, inode);
ret2 = ext4_journal_stop(handle);
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index de5619f..635b5dc 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -277,7 +277,8 @@ static inline void add_chain(Indirect *p, struct buffer_head *bh, __le32 *v)
*/

static int ext4_block_to_path(struct inode *inode,
- long i_block, int offsets[4], int *boundary)
+ ext4_inoblk_t i_block,
+ ext4_inoblk_t offsets[4], int *boundary)
{
int ptrs = EXT4_ADDR_PER_BLOCK(inode->i_sb);
int ptrs_bits = EXT4_ADDR_PER_BLOCK_BITS(inode->i_sb);
@@ -345,7 +346,8 @@ static int ext4_block_to_path(struct inode *inode,
* Need to be called with
* mutex_lock(&EXT4_I(inode)->truncate_mutex)
*/
-static Indirect *ext4_get_branch(struct inode *inode, int depth, int *offsets,
+static Indirect *ext4_get_branch(struct inode *inode, int depth,
+ ext4_inoblk_t *offsets,
Indirect chain[4], int *err)
{
struct super_block *sb = inode->i_sb;
@@ -434,7 +436,7 @@ static ext4_fsblk_t ext4_find_near(struct inode *inode, Indirect *ind)
* stores it in *@goal and returns zero.
*/

-static ext4_fsblk_t ext4_find_goal(struct inode *inode, long block,
+static ext4_fsblk_t ext4_find_goal(struct inode *inode, ext4_inoblk_t block,
Indirect chain[4], Indirect *partial)
{
struct ext4_block_alloc_info *block_i;
@@ -579,7 +581,7 @@ failed_out:
*/
static int ext4_alloc_branch(handle_t *handle, struct inode *inode,
int indirect_blks, int *blks, ext4_fsblk_t goal,
- int *offsets, Indirect *branch)
+ ext4_inoblk_t *offsets, Indirect *branch)
{
int blocksize = inode->i_sb->s_blocksize;
int i, n = 0;
@@ -669,7 +671,7 @@ failed:
* chain to new block and return 0.
*/
static int ext4_splice_branch(handle_t *handle, struct inode *inode,
- long block, Indirect *where, int num, int blks)
+ ext4_inoblk_t block, Indirect *where, int num, int blks)
{
int i;
int err = 0;
@@ -777,12 +779,12 @@ err_out:
* mutex_lock(&EXT4_I(inode)->truncate_mutex)
*/
int ext4_get_blocks_handle(handle_t *handle, struct inode *inode,
- sector_t iblock, unsigned long maxblocks,
+ ext4_inoblk_t iblock, unsigned long maxblocks,
struct buffer_head *bh_result,
int create, int extend_disksize)
{
int err = -EIO;
- int offsets[4];
+ ext4_inoblk_t offsets[4];
Indirect chain[4];
Indirect *partial;
ext4_fsblk_t goal;
@@ -796,7 +798,8 @@ int ext4_get_blocks_handle(handle_t *handle, struct inode *inode,

J_ASSERT(!(EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL));
J_ASSERT(handle != NULL || create == 0);
- depth = ext4_block_to_path(inode,iblock,offsets,&blocks_to_boundary);
+ depth = ext4_block_to_path(inode, iblock, offsets,
+ &blocks_to_boundary);

if (depth == 0)
goto out;
@@ -2005,7 +2008,7 @@ static inline int all_zeroes(__le32 *p, __le32 *q)
* (no partially truncated stuff there). */

static Indirect *ext4_find_shared(struct inode *inode, int depth,
- int offsets[4], Indirect chain[4], __le32 *top)
+ ext4_inoblk_t offsets[4], Indirect chain[4], __le32 *top)
{
Indirect *partial, *p;
int k, err;
@@ -2330,12 +2333,12 @@ void ext4_truncate(struct inode *inode)
__le32 *i_data = ei->i_data;
int addr_per_block = EXT4_ADDR_PER_BLOCK(inode->i_sb);
struct address_space *mapping = inode->i_mapping;
- int offsets[4];
+ ext4_inoblk_t offsets[4];
Indirect chain[4];
Indirect *partial;
__le32 nr = 0;
int n;
- long last_block;
+ ext4_inoblk_t last_block;
unsigned blocksize = inode->i_sb->s_blocksize;
struct page *page;

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 79a3530..f95e667 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -349,7 +349,7 @@ struct ext4_prealloc_space {
atomic_t pa_count;
unsigned pa_deleted;
ext4_fsblk_t pa_pstart; /* phys. block */
- unsigned long pa_lstart; /* log. block */
+ ext4_inoblk_t pa_lstart; /* log. block */
unsigned short pa_len; /* len of preallocated chunk */
unsigned short pa_free; /* how many blocks are free */
unsigned short pa_linear; /* consumed in one direction
@@ -360,7 +360,7 @@ struct ext4_prealloc_space {


struct ext4_free_extent {
- unsigned long fe_logical;
+ ext4_inoblk_t fe_logical;
ext4_grpblk_t fe_start;
unsigned long fe_group;
unsigned long fe_len;
@@ -2058,13 +2058,13 @@ static int ext4_mb_seq_history_show(struct seq_file *seq, void *v)
"%-5u %-5s %-5u %-6u\n";
sprintf(buf2, "%lu/%d/%[email protected]%lu", hs->result.fe_group,
hs->result.fe_start, hs->result.fe_len,
- hs->result.fe_logical);
+ (unsigned long)hs->result.fe_logical);
sprintf(buf, "%lu/%d/%[email protected]%lu", hs->orig.fe_group,
hs->orig.fe_start, hs->orig.fe_len,
- hs->orig.fe_logical);
+ (unsigned long)hs->orig.fe_logical);
sprintf(buf3, "%lu/%d/%[email protected]%lu", hs->goal.fe_group,
hs->goal.fe_start, hs->goal.fe_len,
- hs->goal.fe_logical);
+ (unsigned long)hs->goal.fe_logical);
seq_printf(seq, fmt, hs->pid, hs->ino, buf, buf3, buf2,
hs->found, hs->groups, hs->cr, hs->flags,
hs->merged ? "M" : "", hs->tail,
@@ -2073,10 +2073,10 @@ static int ext4_mb_seq_history_show(struct seq_file *seq, void *v)
fmt = "%-5u %-8u %-23s %-23s %-23s\n";
sprintf(buf2, "%lu/%d/%[email protected]%lu", hs->result.fe_group,
hs->result.fe_start, hs->result.fe_len,
- hs->result.fe_logical);
+ (unsigned long)hs->result.fe_logical);
sprintf(buf, "%lu/%d/%[email protected]%lu", hs->orig.fe_group,
hs->orig.fe_start, hs->orig.fe_len,
- hs->orig.fe_logical);
+ (unsigned long)hs->orig.fe_logical);
seq_printf(seq, fmt, hs->pid, hs->ino, buf, "", buf2);
} else if (hs->op == EXT4_MB_HISTORY_DISCARD) {
sprintf(buf2, "%lu/%d/%lu", hs->result.fe_group,
@@ -3067,17 +3067,14 @@ static void ext4_mb_normalize_group_request(struct ext4_allocation_context *ac)
static void ext4_mb_normalize_request(struct ext4_allocation_context *ac,
struct ext4_allocation_request *ar)
{
+ unsigned long wind;
+ int bsbits, i;
+ ext4_inoblk_t end;
+ struct list_head *cur;
+ loff_t size, orig_size;
+ ext4_inoblk_t start, orig_start;
struct ext4_inode_info *ei = EXT4_I(ac->ac_inode);
struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb);
- loff_t start;
- loff_t end;
- loff_t size;
- loff_t orig_size;
- loff_t orig_start;
- loff_t wind;
- struct list_head *cur;
- int bsbits;
- int i;

/* do normalize only data requests, metadata requests
do not need preallocation */
diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c
index 3a306b8..ec1b2ee 100644
--- a/fs/ext4/migrate.c
+++ b/fs/ext4/migrate.c
@@ -17,7 +17,7 @@
#include <linux/ext4_fs_extents.h>

struct list_blocks_struct {
- int first_block, last_block;
+ ext4_inoblk_t first_block, last_block;
ext4_fsblk_t first_pblock, last_pblock;
};

@@ -85,7 +85,7 @@ err_out:
return retval;
}
static int update_extent_range(handle_t *handle, struct inode *inode,
- ext4_fsblk_t pblock, int blk_num,
+ ext4_fsblk_t pblock, ext4_inoblk_t blk_num,
struct list_blocks_struct *lb)
{
int retval;
@@ -112,13 +112,13 @@ static int update_extent_range(handle_t *handle, struct inode *inode,
}

static int update_ind_extent_range(handle_t *handle, struct inode *inode,
- ext4_fsblk_t pblock, int *blk_nump,
- struct list_blocks_struct *lb)
+ ext4_fsblk_t pblock, ext4_inoblk_t *blk_nump,
+ struct list_blocks_struct *lb)
{
struct buffer_head *bh;
__le32 *i_data;
int i, retval = 0;
- int blk_count = *blk_nump;
+ ext4_inoblk_t blk_count = *blk_nump;
unsigned long max_entries = inode->i_sb->s_blocksize >> 2;

if (!pblock) {
@@ -150,13 +150,13 @@ static int update_ind_extent_range(handle_t *handle, struct inode *inode,

}
static int update_dind_extent_range(handle_t *handle, struct inode *inode,
- ext4_fsblk_t pblock, int *blk_nump,
- struct list_blocks_struct *lb)
+ ext4_fsblk_t pblock, ext4_inoblk_t *blk_nump,
+ struct list_blocks_struct *lb)
{
struct buffer_head *bh;
__le32 *i_data;
int i, retval = 0;
- int blk_count = *blk_nump;
+ ext4_inoblk_t blk_count = *blk_nump;
unsigned long max_entries = inode->i_sb->s_blocksize >> 2;

if (!pblock) {
@@ -191,13 +191,13 @@ static int update_dind_extent_range(handle_t *handle, struct inode *inode,

}
static int update_tind_extent_range(handle_t *handle, struct inode *inode,
- ext4_fsblk_t pblock, int *blk_nump,
- struct list_blocks_struct *lb)
+ ext4_fsblk_t pblock, ext4_inoblk_t *blk_nump,
+ struct list_blocks_struct *lb)
{
struct buffer_head *bh;
__le32 *i_data;
int i, retval = 0;
- int blk_count = *blk_nump;
+ ext4_inoblk_t blk_count = *blk_nump;
unsigned long max_entries = inode->i_sb->s_blocksize >> 2;

if (!pblock) {
@@ -445,7 +445,7 @@ int ext4_ext_migrate(struct inode * inode, struct file * filp,
handle_t *handle;
int retval = 0, i;
__le32 *i_data;
- int blk_count = 0;
+ ext4_inoblk_t blk_count = 0;
struct ext4_inode_info *ei;
struct inode *tmp_inode = NULL;
struct list_blocks_struct lb;
diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h
index 6a0909f..74a5def 100644
--- a/include/linux/ext4_fs.h
+++ b/include/linux/ext4_fs.h
@@ -68,11 +68,11 @@

struct ext4_allocation_request {
struct inode *inode; /* target inode for block we're allocating */
- ext4_fsblk_t logical; /* logical block in target inode */
+ ext4_inoblk_t logical; /* logical block in target inode */
ext4_fsblk_t goal; /* phys. target (a hint) */
- ext4_fsblk_t lleft; /* the closest logical allocated block to the left */
+ ext4_inoblk_t lleft; /* the closest logical allocated block to the left */
ext4_fsblk_t pleft; /* phys. block for ^^^ */
- ext4_fsblk_t lright; /* the closest logical allocated block to the right */
+ ext4_inoblk_t lright; /* the closest logical allocated block to the right */
ext4_fsblk_t pright; /* phys. block for ^^^ */
unsigned long len; /* how many blocks we want to allocate */
unsigned long flags; /* flags. see above EXT4_MB_HINT_* */
@@ -966,7 +966,7 @@ int ext4_forget(handle_t *handle, int is_metadata, struct inode *inode,
struct buffer_head * ext4_getblk (handle_t *, struct inode *, long, int, int *);
struct buffer_head * ext4_bread (handle_t *, struct inode *, int, int, int *);
int ext4_get_blocks_handle(handle_t *handle, struct inode *inode,
- sector_t iblock, unsigned long maxblocks, struct buffer_head *bh_result,
+ ext4_inoblk_t iblock, unsigned long maxblocks, struct buffer_head *bh_result,
int create, int extend_disksize);

extern void ext4_read_inode (struct inode *);
@@ -1099,7 +1099,7 @@ extern const struct inode_operations ext4_fast_symlink_inode_operations;
extern int ext4_ext_tree_init(handle_t *handle, struct inode *);
extern int ext4_ext_writepage_trans_blocks(struct inode *, int);
extern int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
- ext4_fsblk_t iblock,
+ ext4_inoblk_t iblock,
unsigned long max_blocks, struct buffer_head *bh_result,
int create, int extend_disksize);
extern void ext4_ext_truncate(struct inode *, struct page *);
@@ -1115,11 +1115,13 @@ ext4_get_blocks_wrap(handle_t *handle, struct inode *inode, sector_t block,
int retval;
mutex_lock(&EXT4_I(inode)->truncate_mutex);
if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL) {
- retval = ext4_ext_get_blocks(handle, inode, block, max_blocks,
- bh, create, extend_disksize);
+ retval = ext4_ext_get_blocks(handle, inode,
+ (ext4_inoblk_t)block, max_blocks,
+ bh, create, extend_disksize);
} else {
- retval = ext4_get_blocks_handle(handle, inode, block, max_blocks,
- bh, create, extend_disksize);
+ retval = ext4_get_blocks_handle(handle, inode,
+ (ext4_inoblk_t)block, max_blocks,
+ bh, create, extend_disksize);
}
mutex_unlock(&EXT4_I(inode)->truncate_mutex);

diff --git a/include/linux/ext4_fs_extents.h b/include/linux/ext4_fs_extents.h
index 149fd4b..9c9cf10 100644
--- a/include/linux/ext4_fs_extents.h
+++ b/include/linux/ext4_fs_extents.h
@@ -124,20 +124,6 @@ struct ext4_ext_path {
#define EXT4_EXT_CACHE_GAP 1
#define EXT4_EXT_CACHE_EXTENT 2

-/*
- * to be called by ext4_ext_walk_space()
- * negative retcode - error
- * positive retcode - signal for ext4_ext_walk_space(), see below
- * callback must return valid extent (passed or newly created)
- */
-typedef int (*ext_prepare_callback)(struct inode *, struct ext4_ext_path *,
- struct ext4_ext_cache *,
- void *);
-
-#define EXT_CONTINUE 0
-#define EXT_BREAK 1
-#define EXT_REPEAT 2
-

#define EXT_MAX_BLOCK 0xffffffff

@@ -233,10 +219,11 @@ extern int ext4_ext_try_to_merge(struct inode *inode,
struct ext4_extent *);
extern unsigned int ext4_ext_check_overlap(struct inode *, struct ext4_extent *, struct ext4_ext_path *);
extern int ext4_ext_insert_extent(handle_t *, struct inode *, struct ext4_ext_path *, struct ext4_extent *);
-extern int ext4_ext_walk_space(struct inode *, unsigned long, unsigned long, ext_prepare_callback, void *);
-extern struct ext4_ext_path * ext4_ext_find_extent(struct inode *, int, struct ext4_ext_path *);
-
-extern int ext4_ext_search_left(struct inode *, struct ext4_ext_path *, ext4_fsblk_t *, ext4_fsblk_t *);
-extern int ext4_ext_search_right(struct inode *, struct ext4_ext_path *, ext4_fsblk_t *, ext4_fsblk_t *);
+extern struct ext4_ext_path * ext4_ext_find_extent(struct inode *, ext4_inoblk_t,
+ struct ext4_ext_path *);
+extern int ext4_ext_search_left(struct inode *, struct ext4_ext_path *,
+ ext4_inoblk_t *, ext4_fsblk_t *);
+extern int ext4_ext_search_right(struct inode *, struct ext4_ext_path *,
+ ext4_inoblk_t *, ext4_fsblk_t *);
#endif /* _LINUX_EXT4_EXTENTS */

diff --git a/include/linux/ext4_fs_i.h b/include/linux/ext4_fs_i.h
index 2317242..5f136ba 100644
--- a/include/linux/ext4_fs_i.h
+++ b/include/linux/ext4_fs_i.h
@@ -27,6 +27,9 @@ typedef int ext4_grpblk_t;
/* data type for filesystem-wide blocks number */
typedef unsigned long long ext4_fsblk_t;

+/* data type for inode block number */
+typedef __u32 ext4_inoblk_t;
+
struct ext4_reserve_window {
ext4_fsblk_t _rsv_start; /* First byte reserved */
ext4_fsblk_t _rsv_end; /* Last byte reserved or 0 */
@@ -67,7 +70,7 @@ struct ext4_block_alloc_info {
*/
struct ext4_ext_cache {
ext4_fsblk_t ec_start;
- __u32 ec_block;
+ ext4_inoblk_t ec_block;
__u32 ec_len; /* must be 32bit to return holes */
__u32 ec_type;
};
--
1.5.3.4.206.g58ba4-dirty


2007-10-10 00:48:15

by Theodore Ts'o

[permalink] [raw]
Subject: Re: [PATCH] ext4: Introduce ext4_inoblk_t

On Tue, Oct 09, 2007 at 09:36:12PM +0530, Aneesh Kumar K.V wrote:
> This patch adds a new data type ext4_inoblk_t to represent
> the logical file blocks.

I'd suggest ext4_lblk_t instead of ext4_inoblk_t. It's not at all
obvious what "inode block" means. "Logical block" makes a lot more
sense.

Personally, I was never synced with ext4_fsblk_t myself; I think
ext4_pblk_t would make a lot more sense.

- Ted