static ext4_fsblk_t ext4_find_goal(struct inode *inode, ext4_lblk_t block,
Indirect *partial)
{
- struct ext4_block_alloc_info *block_i;
-
- block_i = EXT4_I(inode)->i_block_alloc_info;
-
/*
- * try the heuristic for sequential allocation,
- * failing that at least try to get decent locality.
+ * XXX need to get goal block from mballoc's data structures
*/
- if (block_i && (block == block_i->last_alloc_logical_block + 1)
- && (block_i->last_alloc_physical_block != 0)) {
- return block_i->last_alloc_physical_block + 1;
- }
return ext4_find_near(inode, partial);
}
{
int i;
int err = 0;
- struct ext4_block_alloc_info *block_i;
ext4_fsblk_t current_block;
- block_i = EXT4_I(inode)->i_block_alloc_info;
/*
* If we're splicing into a [td]indirect block (as opposed to the
* inode) then we need to get write access to the [td]indirect block
*(where->p + i) = cpu_to_le32(current_block++);
}
- /*
- * update the most recently allocated logical & physical block
- * in i_block_alloc_info, to assist find the proper goal block for next
- * allocation
- */
- if (block_i) {
- block_i->last_alloc_logical_block = block + blks - 1;
- block_i->last_alloc_physical_block =
- le32_to_cpu(where[num].key) + blks - 1;
- }
-
/* We are done with atomic stuff, now do the rest of housekeeping */
inode->i_ctime = ext4_current_time(inode);
goto cleanup;
/*
- * Okay, we need to do block allocation. Lazily initialize the block
- * allocation info here if necessary
+ * Okay, we need to do block allocation.
*/
- if (S_ISREG(inode->i_mode) && (!ei->i_block_alloc_info))
- ext4_init_block_alloc_info(inode);
-
goal = ext4_find_goal(inode, iblock, partial);
/* the number of blocks need to allocate for [d,t]indirect blocks */
/* Maximum number of blocks we map for direct IO at once. */
#define DIO_MAX_BLOCKS 4096
-static int ext4_get_block(struct inode *inode, sector_t iblock,
- struct buffer_head *bh_result, int create)
+int ext4_get_block(struct inode *inode, sector_t iblock,
+ struct buffer_head *bh_result, int create)
{
handle_t *handle = ext4_journal_current_handle();
int ret = 0, started = 0;
unlock_page(page);
ext4_journal_stop(handle);
page_cache_release(page);
+ /*
+ * block_write_begin may have instantiated a few blocks
+ * outside i_size. Trim these off again. Don't need
+ * i_size_read because we hold i_mutex.
+ */
+ if (pos + len > inode->i_size)
+ vmtruncate(inode, inode->i_size);
}
if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
ret = ext4_jbd2_file_inode(handle, inode);
if (ret == 0) {
- /*
- * generic_write_end() will run mark_inode_dirty() if i_size
- * changes. So let's piggyback the i_disksize mark_inode_dirty
- * into that.
- */
loff_t new_i_size;
new_i_size = pos + copied;
- if (new_i_size > EXT4_I(inode)->i_disksize)
- EXT4_I(inode)->i_disksize = new_i_size;
+ if (new_i_size > EXT4_I(inode)->i_disksize) {
+ ext4_update_i_disksize(inode, new_i_size);
+ /* We need to mark inode dirty even if
+ * new_i_size is less that inode->i_size
+ * bu greater than i_disksize.(hint delalloc)
+ */
+ ext4_mark_inode_dirty(handle, inode);
+ }
+
ret2 = generic_write_end(file, mapping, pos, len, copied,
page, fsdata);
copied = ret2;
loff_t new_i_size;
new_i_size = pos + copied;
- if (new_i_size > EXT4_I(inode)->i_disksize)
- EXT4_I(inode)->i_disksize = new_i_size;
+ if (new_i_size > EXT4_I(inode)->i_disksize) {
+ ext4_update_i_disksize(inode, new_i_size);
+ /* We need to mark inode dirty even if
+ * new_i_size is less that inode->i_size
+ * bu greater than i_disksize.(hint delalloc)
+ */
+ ext4_mark_inode_dirty(handle, inode);
+ }
ret2 = generic_write_end(file, mapping, pos, len, copied,
page, fsdata);
int ret = 0, ret2;
int partial = 0;
unsigned from, to;
+ loff_t new_i_size;
from = pos & (PAGE_CACHE_SIZE - 1);
to = from + len;
to, &partial, write_end_fn);
if (!partial)
SetPageUptodate(page);
- if (pos+copied > inode->i_size)
+ new_i_size = pos + copied;
+ if (new_i_size > inode->i_size)
i_size_write(inode, pos+copied);
EXT4_I(inode)->i_state |= EXT4_STATE_JDATA;
- if (inode->i_size > EXT4_I(inode)->i_disksize) {
- EXT4_I(inode)->i_disksize = inode->i_size;
+ if (new_i_size > EXT4_I(inode)->i_disksize) {
+ ext4_update_i_disksize(inode, new_i_size);
ret2 = ext4_mark_inode_dirty(handle, inode);
if (!ret)
ret = ret2;
if (disksize > i_size_read(inode))
disksize = i_size_read(inode);
if (disksize > EXT4_I(inode)->i_disksize) {
- /*
- * XXX: replace with spinlock if seen contended -bzzz
- */
- down_write(&EXT4_I(inode)->i_data_sem);
- if (disksize > EXT4_I(inode)->i_disksize)
- EXT4_I(inode)->i_disksize = disksize;
- up_write(&EXT4_I(inode)->i_data_sem);
-
- if (EXT4_I(inode)->i_disksize == disksize) {
- ret = ext4_mark_inode_dirty(handle, inode);
- return ret;
- }
+ ext4_update_i_disksize(inode, disksize);
+ ret = ext4_mark_inode_dirty(handle, inode);
+ return ret;
}
ret = 0;
}
unlock_page(page);
ext4_journal_stop(handle);
page_cache_release(page);
+ /*
+ * block_write_begin may have instantiated a few blocks
+ * outside i_size. Trim these off again. Don't need
+ * i_size_read because we hold i_mutex.
+ */
+ if (pos + len > inode->i_size)
+ vmtruncate(inode, inode->i_size);
}
if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
EXT4_I(inode)->i_disksize = new_i_size;
}
up_write(&EXT4_I(inode)->i_data_sem);
+ /* We need to mark inode dirty even if
+ * new_i_size is less that inode->i_size
+ * bu greater than i_disksize.(hint delalloc)
+ */
+ ext4_mark_inode_dirty(handle, inode);
}
}
ret2 = generic_write_end(file, mapping, pos, len, copied,
*/
down_write(&ei->i_data_sem);
- ext4_discard_reservation(inode);
+ ext4_discard_preallocations(inode);
/*
* The orphan list entry will now protect us from any crash which
ext4_journal_stop(handle);
}
-static ext4_fsblk_t ext4_get_inode_block(struct super_block *sb,
- unsigned long ino, struct ext4_iloc *iloc)
-{
- ext4_group_t block_group;
- unsigned long offset;
- ext4_fsblk_t block;
- struct ext4_group_desc *gdp;
-
- if (!ext4_valid_inum(sb, ino)) {
- /*
- * This error is already checked for in namei.c unless we are
- * looking at an NFS filehandle, in which case no error
- * report is needed
- */
- return 0;
- }
-
- block_group = (ino - 1) / EXT4_INODES_PER_GROUP(sb);
- gdp = ext4_get_group_desc(sb, block_group, NULL);
- if (!gdp)
- return 0;
-
- /*
- * Figure out the offset within the block group inode table
- */
- offset = ((ino - 1) % EXT4_INODES_PER_GROUP(sb)) *
- EXT4_INODE_SIZE(sb);
- block = ext4_inode_table(sb, gdp) +
- (offset >> EXT4_BLOCK_SIZE_BITS(sb));
-
- iloc->block_group = block_group;
- iloc->offset = offset & (EXT4_BLOCK_SIZE(sb) - 1);
- return block;
-}
-
/*
* ext4_get_inode_loc returns with an extra refcount against the inode's
* underlying buffer_head on success. If 'in_mem' is true, we have all
static int __ext4_get_inode_loc(struct inode *inode,
struct ext4_iloc *iloc, int in_mem)
{
- ext4_fsblk_t block;
- struct buffer_head *bh;
+ struct ext4_group_desc *gdp;
+ struct buffer_head *bh;
+ struct super_block *sb = inode->i_sb;
+ ext4_fsblk_t block;
+ int inodes_per_block, inode_offset;
+
+ iloc->bh = 0;
+ if (!ext4_valid_inum(sb, inode->i_ino))
+ return -EIO;
- block = ext4_get_inode_block(inode->i_sb, inode->i_ino, iloc);
- if (!block)
+ iloc->block_group = (inode->i_ino - 1) / EXT4_INODES_PER_GROUP(sb);
+ gdp = ext4_get_group_desc(sb, iloc->block_group, NULL);
+ if (!gdp)
return -EIO;
- bh = sb_getblk(inode->i_sb, block);
+ /*
+ * Figure out the offset within the block group inode table
+ */
+ inodes_per_block = (EXT4_BLOCK_SIZE(sb) / EXT4_INODE_SIZE(sb));
+ inode_offset = ((inode->i_ino - 1) %
+ EXT4_INODES_PER_GROUP(sb));
+ block = ext4_inode_table(sb, gdp) + (inode_offset / inodes_per_block);
+ iloc->offset = (inode_offset % inodes_per_block) * EXT4_INODE_SIZE(sb);
+
+ bh = sb_getblk(sb, block);
if (!bh) {
- ext4_error (inode->i_sb, "ext4_get_inode_loc",
- "unable to read inode block - "
- "inode=%lu, block=%llu",
- inode->i_ino, block);
+ ext4_error(sb, "ext4_get_inode_loc", "unable to read "
+ "inode block - inode=%lu, block=%llu",
+ inode->i_ino, block);
return -EIO;
}
if (!buffer_uptodate(bh)) {
*/
if (in_mem) {
struct buffer_head *bitmap_bh;
- struct ext4_group_desc *desc;
- int inodes_per_buffer;
- int inode_offset, i;
- ext4_group_t block_group;
- int start;
-
- block_group = (inode->i_ino - 1) /
- EXT4_INODES_PER_GROUP(inode->i_sb);
- inodes_per_buffer = bh->b_size /
- EXT4_INODE_SIZE(inode->i_sb);
- inode_offset = ((inode->i_ino - 1) %
- EXT4_INODES_PER_GROUP(inode->i_sb));
- start = inode_offset & ~(inodes_per_buffer - 1);
+ int i, start;
- /* Is the inode bitmap in cache? */
- desc = ext4_get_group_desc(inode->i_sb,
- block_group, NULL);
- if (!desc)
- goto make_io;
+ start = inode_offset & ~(inodes_per_block - 1);
- bitmap_bh = sb_getblk(inode->i_sb,
- ext4_inode_bitmap(inode->i_sb, desc));
+ /* Is the inode bitmap in cache? */
+ bitmap_bh = sb_getblk(sb, ext4_inode_bitmap(sb, gdp));
if (!bitmap_bh)
goto make_io;
brelse(bitmap_bh);
goto make_io;
}
- for (i = start; i < start + inodes_per_buffer; i++) {
+ for (i = start; i < start + inodes_per_block; i++) {
if (i == inode_offset)
continue;
if (ext4_test_bit(i, bitmap_bh->b_data))
break;
}
brelse(bitmap_bh);
- if (i == start + inodes_per_buffer) {
+ if (i == start + inodes_per_block) {
/* all other inodes are free, so skip I/O */
memset(bh->b_data, 0, bh->b_size);
set_buffer_uptodate(bh);
}
make_io:
+ /*
+ * If we need to do any I/O, try to pre-readahead extra
+ * blocks from the inode table.
+ */
+ if (EXT4_SB(sb)->s_inode_readahead_blks) {
+ ext4_fsblk_t b, end, table;
+ unsigned num;
+
+ table = ext4_inode_table(sb, gdp);
+ /* Make sure s_inode_readahead_blks is a power of 2 */
+ while (EXT4_SB(sb)->s_inode_readahead_blks &
+ (EXT4_SB(sb)->s_inode_readahead_blks-1))
+ EXT4_SB(sb)->s_inode_readahead_blks =
+ (EXT4_SB(sb)->s_inode_readahead_blks &
+ (EXT4_SB(sb)->s_inode_readahead_blks-1));
+ b = block & ~(EXT4_SB(sb)->s_inode_readahead_blks-1);
+ if (table > b)
+ b = table;
+ end = b + EXT4_SB(sb)->s_inode_readahead_blks;
+ num = EXT4_INODES_PER_GROUP(sb);
+ if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
+ num -= le16_to_cpu(gdp->bg_itable_unused);
+ table += num / inodes_per_block;
+ if (end > table)
+ end = table;
+ while (b <= end)
+ sb_breadahead(sb, b++);
+ }
+
/*
* There are other valid inodes in the buffer, this inode
* has in-inode xattrs, or we don't have this inode in memory.
submit_bh(READ_META, bh);
wait_on_buffer(bh);
if (!buffer_uptodate(bh)) {
- ext4_error(inode->i_sb, "ext4_get_inode_loc",
- "unable to read inode block - "
- "inode=%lu, block=%llu",
- inode->i_ino, block);
+ ext4_error(sb, __func__,
+ "unable to read inode block - inode=%lu, "
+ "block=%llu", inode->i_ino, block);
brelse(bh);
return -EIO;
}
return inode;
ei = EXT4_I(inode);
-#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL
+#ifdef CONFIG_EXT4_FS_POSIX_ACL
ei->i_acl = EXT4_ACL_NOT_CACHED;
ei->i_default_acl = EXT4_ACL_NOT_CACHED;
#endif
- ei->i_block_alloc_info = NULL;
ret = __ext4_get_inode_loc(inode, &iloc, 0);
if (ret < 0)
projects / linux-2.6-omap-h63xx.git / blobdiff