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Date: Mon, 14 Dec 2009 10:05:50 -0800
From: Greg KH <gregkh@...e.de>
To: linux-kernel@...r.kernel.org,
Andrew Morton <akpm@...ux-foundation.org>,
torvalds@...ux-foundation.org, stable@...nel.org, lwn@....net
Subject: Re: Linux 2.6.32.1
diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt
index 6d94e06..af6885c 100644
--- a/Documentation/filesystems/ext4.txt
+++ b/Documentation/filesystems/ext4.txt
@@ -153,8 +153,8 @@ journal_dev=devnum When the external journal device's major/minor numbers
identified through its new major/minor numbers encoded
in devnum.
-noload Don't load the journal on mounting. Note that
- if the filesystem was not unmounted cleanly,
+norecovery Don't load the journal on mounting. Note that
+noload if the filesystem was not unmounted cleanly,
skipping the journal replay will lead to the
filesystem containing inconsistencies that can
lead to any number of problems.
@@ -353,6 +353,12 @@ noauto_da_alloc replacing existing files via patterns such as
system crashes before the delayed allocation
blocks are forced to disk.
+discard Controls whether ext4 should issue discard/TRIM
+nodiscard(*) commands to the underlying block device when
+ blocks are freed. This is useful for SSD devices
+ and sparse/thinly-provisioned LUNs, but it is off
+ by default until sufficient testing has been done.
+
Data Mode
=========
There are 3 different data modes:
diff --git a/Makefile b/Makefile
index f5cdb72..d0d7e9c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
VERSION = 2
PATCHLEVEL = 6
SUBLEVEL = 32
-EXTRAVERSION =
+EXTRAVERSION = .1
NAME = Man-Eating Seals of Antiquity
# *DOCUMENTATION*
diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c
index c968cc3..554626e 100644
--- a/drivers/scsi/hosts.c
+++ b/drivers/scsi/hosts.c
@@ -180,14 +180,20 @@ void scsi_remove_host(struct Scsi_Host *shost)
EXPORT_SYMBOL(scsi_remove_host);
/**
- * scsi_add_host - add a scsi host
+ * scsi_add_host_with_dma - add a scsi host with dma device
* @shost: scsi host pointer to add
* @dev: a struct device of type scsi class
+ * @dma_dev: dma device for the host
+ *
+ * Note: You rarely need to worry about this unless you're in a
+ * virtualised host environments, so use the simpler scsi_add_host()
+ * function instead.
*
* Return value:
* 0 on success / != 0 for error
**/
-int scsi_add_host(struct Scsi_Host *shost, struct device *dev)
+int scsi_add_host_with_dma(struct Scsi_Host *shost, struct device *dev,
+ struct device *dma_dev)
{
struct scsi_host_template *sht = shost->hostt;
int error = -EINVAL;
@@ -207,6 +213,7 @@ int scsi_add_host(struct Scsi_Host *shost, struct device *dev)
if (!shost->shost_gendev.parent)
shost->shost_gendev.parent = dev ? dev : &platform_bus;
+ shost->dma_dev = dma_dev;
error = device_add(&shost->shost_gendev);
if (error)
@@ -262,7 +269,7 @@ int scsi_add_host(struct Scsi_Host *shost, struct device *dev)
fail:
return error;
}
-EXPORT_SYMBOL(scsi_add_host);
+EXPORT_SYMBOL(scsi_add_host_with_dma);
static void scsi_host_dev_release(struct device *dev)
{
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 562d8ce..f913f1e 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -2408,7 +2408,7 @@ lpfc_create_port(struct lpfc_hba *phba, int instance, struct device *dev)
vport->els_tmofunc.function = lpfc_els_timeout;
vport->els_tmofunc.data = (unsigned long)vport;
- error = scsi_add_host(shost, dev);
+ error = scsi_add_host_with_dma(shost, dev, &phba->pcidev->dev);
if (error)
goto out_put_shost;
diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c
index a39addc..507ccc6 100644
--- a/drivers/scsi/megaraid/megaraid_sas.c
+++ b/drivers/scsi/megaraid/megaraid_sas.c
@@ -3032,7 +3032,7 @@ megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
int error = 0, i;
void *sense = NULL;
dma_addr_t sense_handle;
- u32 *sense_ptr;
+ unsigned long *sense_ptr;
memset(kbuff_arr, 0, sizeof(kbuff_arr));
@@ -3109,7 +3109,7 @@ megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
}
sense_ptr =
- (u32 *) ((unsigned long)cmd->frame + ioc->sense_off);
+ (unsigned long *) ((unsigned long)cmd->frame + ioc->sense_off);
*sense_ptr = sense_handle;
}
@@ -3140,8 +3140,8 @@ megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
* sense_ptr points to the location that has the user
* sense buffer address
*/
- sense_ptr = (u32 *) ((unsigned long)ioc->frame.raw +
- ioc->sense_off);
+ sense_ptr = (unsigned long *) ((unsigned long)ioc->frame.raw +
+ ioc->sense_off);
if (copy_to_user((void __user *)((unsigned long)(*sense_ptr)),
sense, ioc->sense_len)) {
diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index fbcb82a..21e2bc4 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -1654,7 +1654,8 @@ qla24xx_vport_create(struct fc_vport *fc_vport, bool disable)
fc_vport_set_state(fc_vport, FC_VPORT_LINKDOWN);
}
- if (scsi_add_host(vha->host, &fc_vport->dev)) {
+ if (scsi_add_host_with_dma(vha->host, &fc_vport->dev,
+ &ha->pdev->dev)) {
DEBUG15(printk("scsi(%ld): scsi_add_host failure for VP[%d].\n",
vha->host_no, vha->vp_idx));
goto vport_create_failed_2;
diff --git a/drivers/scsi/scsi_lib_dma.c b/drivers/scsi/scsi_lib_dma.c
index ac6855c..dcd1285 100644
--- a/drivers/scsi/scsi_lib_dma.c
+++ b/drivers/scsi/scsi_lib_dma.c
@@ -23,7 +23,7 @@ int scsi_dma_map(struct scsi_cmnd *cmd)
int nseg = 0;
if (scsi_sg_count(cmd)) {
- struct device *dev = cmd->device->host->shost_gendev.parent;
+ struct device *dev = cmd->device->host->dma_dev;
nseg = dma_map_sg(dev, scsi_sglist(cmd), scsi_sg_count(cmd),
cmd->sc_data_direction);
@@ -41,7 +41,7 @@ EXPORT_SYMBOL(scsi_dma_map);
void scsi_dma_unmap(struct scsi_cmnd *cmd)
{
if (scsi_sg_count(cmd)) {
- struct device *dev = cmd->device->host->shost_gendev.parent;
+ struct device *dev = cmd->device->host->dma_dev;
dma_unmap_sg(dev, scsi_sglist(cmd), scsi_sg_count(cmd),
cmd->sc_data_direction);
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 1d04189..f3032c9 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -761,7 +761,13 @@ static unsigned long ext4_bg_num_gdb_meta(struct super_block *sb,
static unsigned long ext4_bg_num_gdb_nometa(struct super_block *sb,
ext4_group_t group)
{
- return ext4_bg_has_super(sb, group) ? EXT4_SB(sb)->s_gdb_count : 0;
+ if (!ext4_bg_has_super(sb, group))
+ return 0;
+
+ if (EXT4_HAS_INCOMPAT_FEATURE(sb,EXT4_FEATURE_INCOMPAT_META_BG))
+ return le32_to_cpu(EXT4_SB(sb)->s_es->s_first_meta_bg);
+ else
+ return EXT4_SB(sb)->s_gdb_count;
}
/**
diff --git a/fs/ext4/block_validity.c b/fs/ext4/block_validity.c
index 50784ef..dc79b75 100644
--- a/fs/ext4/block_validity.c
+++ b/fs/ext4/block_validity.c
@@ -160,7 +160,7 @@ int ext4_setup_system_zone(struct super_block *sb)
if (ext4_bg_has_super(sb, i) &&
((i < 5) || ((i % flex_size) == 0)))
add_system_zone(sbi, ext4_group_first_block_no(sb, i),
- sbi->s_gdb_count + 1);
+ ext4_bg_num_gdb(sb, i) + 1);
gdp = ext4_get_group_desc(sb, i, NULL);
ret = add_system_zone(sbi, ext4_block_bitmap(sb, gdp), 1);
if (ret)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 8825515..bd2a9dd 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -703,6 +703,13 @@ struct ext4_inode_info {
struct list_head i_aio_dio_complete_list;
/* current io_end structure for async DIO write*/
ext4_io_end_t *cur_aio_dio;
+
+ /*
+ * Transactions that contain inode's metadata needed to complete
+ * fsync and fdatasync, respectively.
+ */
+ tid_t i_sync_tid;
+ tid_t i_datasync_tid;
};
/*
@@ -750,6 +757,7 @@ struct ext4_inode_info {
#define EXT4_MOUNT_DELALLOC 0x8000000 /* Delalloc support */
#define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000 /* Abort on file data write */
#define EXT4_MOUNT_BLOCK_VALIDITY 0x20000000 /* Block validity checking */
+#define EXT4_MOUNT_DISCARD 0x40000000 /* Issue DISCARD requests */
#define clear_opt(o, opt) o &= ~EXT4_MOUNT_##opt
#define set_opt(o, opt) o |= EXT4_MOUNT_##opt
diff --git a/fs/ext4/ext4_jbd2.h b/fs/ext4/ext4_jbd2.h
index a286598..1892a77 100644
--- a/fs/ext4/ext4_jbd2.h
+++ b/fs/ext4/ext4_jbd2.h
@@ -49,7 +49,7 @@
#define EXT4_DATA_TRANS_BLOCKS(sb) (EXT4_SINGLEDATA_TRANS_BLOCKS(sb) + \
EXT4_XATTR_TRANS_BLOCKS - 2 + \
- 2*EXT4_QUOTA_TRANS_BLOCKS(sb))
+ EXT4_MAXQUOTAS_TRANS_BLOCKS(sb))
/*
* Define the number of metadata blocks we need to account to modify data.
@@ -57,7 +57,7 @@
* This include super block, inode block, quota blocks and xattr blocks
*/
#define EXT4_META_TRANS_BLOCKS(sb) (EXT4_XATTR_TRANS_BLOCKS + \
- 2*EXT4_QUOTA_TRANS_BLOCKS(sb))
+ EXT4_MAXQUOTAS_TRANS_BLOCKS(sb))
/* Delete operations potentially hit one directory's namespace plus an
* entire inode, plus arbitrary amounts of bitmap/indirection data. Be
@@ -92,6 +92,7 @@
* but inode, sb and group updates are done only once */
#define EXT4_QUOTA_INIT_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_INIT_ALLOC*\
(EXT4_SINGLEDATA_TRANS_BLOCKS(sb)-3)+3+DQUOT_INIT_REWRITE) : 0)
+
#define EXT4_QUOTA_DEL_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_DEL_ALLOC*\
(EXT4_SINGLEDATA_TRANS_BLOCKS(sb)-3)+3+DQUOT_DEL_REWRITE) : 0)
#else
@@ -99,6 +100,9 @@
#define EXT4_QUOTA_INIT_BLOCKS(sb) 0
#define EXT4_QUOTA_DEL_BLOCKS(sb) 0
#endif
+#define EXT4_MAXQUOTAS_TRANS_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_TRANS_BLOCKS(sb))
+#define EXT4_MAXQUOTAS_INIT_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_INIT_BLOCKS(sb))
+#define EXT4_MAXQUOTAS_DEL_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_DEL_BLOCKS(sb))
int
ext4_mark_iloc_dirty(handle_t *handle,
@@ -254,6 +258,19 @@ static inline int ext4_jbd2_file_inode(handle_t *handle, struct inode *inode)
return 0;
}
+static inline void ext4_update_inode_fsync_trans(handle_t *handle,
+ struct inode *inode,
+ int datasync)
+{
+ struct ext4_inode_info *ei = EXT4_I(inode);
+
+ if (ext4_handle_valid(handle)) {
+ ei->i_sync_tid = handle->h_transaction->t_tid;
+ if (datasync)
+ ei->i_datasync_tid = handle->h_transaction->t_tid;
+ }
+}
+
/* super.c */
int ext4_force_commit(struct super_block *sb);
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 715264b..8b8bae4 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -1761,7 +1761,9 @@ int ext4_ext_walk_space(struct inode *inode, ext4_lblk_t block,
while (block < last && block != EXT_MAX_BLOCK) {
num = last - block;
/* find extent for this block */
+ down_read(&EXT4_I(inode)->i_data_sem);
path = ext4_ext_find_extent(inode, block, path);
+ up_read(&EXT4_I(inode)->i_data_sem);
if (IS_ERR(path)) {
err = PTR_ERR(path);
path = NULL;
@@ -2074,7 +2076,7 @@ static int ext4_remove_blocks(handle_t *handle, struct inode *inode,
ext_debug("free last %u blocks starting %llu\n", num, start);
for (i = 0; i < num; i++) {
bh = sb_find_get_block(inode->i_sb, start + i);
- ext4_forget(handle, 0, inode, bh, start + i);
+ ext4_forget(handle, metadata, inode, bh, start + i);
}
ext4_free_blocks(handle, inode, start, num, metadata);
} else if (from == le32_to_cpu(ex->ee_block)
@@ -2167,7 +2169,7 @@ ext4_ext_rm_leaf(handle_t *handle, struct inode *inode,
correct_index = 1;
credits += (ext_depth(inode)) + 1;
}
- credits += 2 * EXT4_QUOTA_TRANS_BLOCKS(inode->i_sb);
+ credits += EXT4_MAXQUOTAS_TRANS_BLOCKS(inode->i_sb);
err = ext4_ext_truncate_extend_restart(handle, inode, credits);
if (err)
@@ -3064,6 +3066,8 @@ ext4_ext_handle_uninitialized_extents(handle_t *handle, struct inode *inode,
if (flags == EXT4_GET_BLOCKS_DIO_CONVERT_EXT) {
ret = ext4_convert_unwritten_extents_dio(handle, inode,
path);
+ if (ret >= 0)
+ ext4_update_inode_fsync_trans(handle, inode, 1);
goto out2;
}
/* buffered IO case */
@@ -3091,6 +3095,8 @@ ext4_ext_handle_uninitialized_extents(handle_t *handle, struct inode *inode,
ret = ext4_ext_convert_to_initialized(handle, inode,
path, iblock,
max_blocks);
+ if (ret >= 0)
+ ext4_update_inode_fsync_trans(handle, inode, 1);
out:
if (ret <= 0) {
err = ret;
@@ -3329,10 +3335,16 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
allocated = ext4_ext_get_actual_len(&newex);
set_buffer_new(bh_result);
- /* Cache only when it is _not_ an uninitialized extent */
- if ((flags & EXT4_GET_BLOCKS_UNINIT_EXT) == 0)
+ /*
+ * Cache the extent and update transaction to commit on fdatasync only
+ * when it is _not_ an uninitialized extent.
+ */
+ if ((flags & EXT4_GET_BLOCKS_UNINIT_EXT) == 0) {
ext4_ext_put_in_cache(inode, iblock, allocated, newblock,
EXT4_EXT_CACHE_EXTENT);
+ ext4_update_inode_fsync_trans(handle, inode, 1);
+ } else
+ ext4_update_inode_fsync_trans(handle, inode, 0);
out:
if (allocated > max_blocks)
allocated = max_blocks;
@@ -3720,10 +3732,8 @@ int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
* Walk the extent tree gathering extent information.
* ext4_ext_fiemap_cb will push extents back to user.
*/
- down_read(&EXT4_I(inode)->i_data_sem);
error = ext4_ext_walk_space(inode, start_blk, len_blks,
ext4_ext_fiemap_cb, fieinfo);
- up_read(&EXT4_I(inode)->i_data_sem);
}
return error;
diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c
index 2b15312..d6049e4 100644
--- a/fs/ext4/fsync.c
+++ b/fs/ext4/fsync.c
@@ -51,25 +51,30 @@
int ext4_sync_file(struct file *file, struct dentry *dentry, int datasync)
{
struct inode *inode = dentry->d_inode;
+ struct ext4_inode_info *ei = EXT4_I(inode);
journal_t *journal = EXT4_SB(inode->i_sb)->s_journal;
- int err, ret = 0;
+ int ret;
+ tid_t commit_tid;
J_ASSERT(ext4_journal_current_handle() == NULL);
trace_ext4_sync_file(file, dentry, datasync);
+ if (inode->i_sb->s_flags & MS_RDONLY)
+ return 0;
+
ret = flush_aio_dio_completed_IO(inode);
if (ret < 0)
- goto out;
+ return ret;
+
+ if (!journal)
+ return simple_fsync(file, dentry, datasync);
+
/*
- * data=writeback:
+ * data=writeback,ordered:
* The caller's filemap_fdatawrite()/wait will sync the data.
- * sync_inode() will sync the metadata
- *
- * data=ordered:
- * The caller's filemap_fdatawrite() will write the data and
- * sync_inode() will write the inode if it is dirty. Then the caller's
- * filemap_fdatawait() will wait on the pages.
+ * Metadata is in the journal, we wait for proper transaction to
+ * commit here.
*
* data=journal:
* filemap_fdatawrite won't do anything (the buffers are clean).
@@ -79,32 +84,13 @@ int ext4_sync_file(struct file *file, struct dentry *dentry, int datasync)
* (they were dirtied by commit). But that's OK - the blocks are
* safe in-journal, which is all fsync() needs to ensure.
*/
- if (ext4_should_journal_data(inode)) {
- ret = ext4_force_commit(inode->i_sb);
- goto out;
- }
+ if (ext4_should_journal_data(inode))
+ return ext4_force_commit(inode->i_sb);
- if (!journal)
- ret = sync_mapping_buffers(inode->i_mapping);
-
- if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
- goto out;
-
- /*
- * The VFS has written the file data. If the inode is unaltered
- * then we need not start a commit.
- */
- if (inode->i_state & (I_DIRTY_SYNC|I_DIRTY_DATASYNC)) {
- struct writeback_control wbc = {
- .sync_mode = WB_SYNC_ALL,
- .nr_to_write = 0, /* sys_fsync did this */
- };
- err = sync_inode(inode, &wbc);
- if (ret == 0)
- ret = err;
- }
-out:
- if (journal && (journal->j_flags & JBD2_BARRIER))
+ commit_tid = datasync ? ei->i_datasync_tid : ei->i_sync_tid;
+ if (jbd2_log_start_commit(journal, commit_tid))
+ jbd2_log_wait_commit(journal, commit_tid);
+ else if (journal->j_flags & JBD2_BARRIER)
blkdev_issue_flush(inode->i_sb->s_bdev, NULL);
return ret;
}
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 2c8caa5..1dae9a4 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1021,10 +1021,12 @@ static int ext4_ind_get_blocks(handle_t *handle, struct inode *inode,
if (!err)
err = ext4_splice_branch(handle, inode, iblock,
partial, indirect_blks, count);
- else
+ if (err)
goto cleanup;
set_buffer_new(bh_result);
+
+ ext4_update_inode_fsync_trans(handle, inode, 1);
got_it:
map_bh(bh_result, inode->i_sb, le32_to_cpu(chain[depth-1].key));
if (count > blocks_to_boundary)
@@ -1052,7 +1054,7 @@ qsize_t ext4_get_reserved_space(struct inode *inode)
EXT4_I(inode)->i_reserved_meta_blocks;
spin_unlock(&EXT4_I(inode)->i_block_reservation_lock);
- return total;
+ return (total << inode->i_blkbits);
}
/*
* Calculate the number of metadata blocks need to reserve
@@ -1534,6 +1536,16 @@ static int do_journal_get_write_access(handle_t *handle,
return ext4_journal_get_write_access(handle, bh);
}
+/*
+ * Truncate blocks that were not used by write. We have to truncate the
+ * pagecache as well so that corresponding buffers get properly unmapped.
+ */
+static void ext4_truncate_failed_write(struct inode *inode)
+{
+ truncate_inode_pages(inode->i_mapping, inode->i_size);
+ ext4_truncate(inode);
+}
+
static int ext4_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
@@ -1599,7 +1611,7 @@ retry:
ext4_journal_stop(handle);
if (pos + len > inode->i_size) {
- ext4_truncate(inode);
+ ext4_truncate_failed_write(inode);
/*
* If truncate failed early the inode might
* still be on the orphan list; we need to
@@ -1709,7 +1721,7 @@ static int ext4_ordered_write_end(struct file *file,
ret = ret2;
if (pos + len > inode->i_size) {
- ext4_truncate(inode);
+ ext4_truncate_failed_write(inode);
/*
* If truncate failed early the inode might still be
* on the orphan list; we need to make sure the inode
@@ -1751,7 +1763,7 @@ static int ext4_writeback_write_end(struct file *file,
ret = ret2;
if (pos + len > inode->i_size) {
- ext4_truncate(inode);
+ ext4_truncate_failed_write(inode);
/*
* If truncate failed early the inode might still be
* on the orphan list; we need to make sure the inode
@@ -1814,7 +1826,7 @@ static int ext4_journalled_write_end(struct file *file,
if (!ret)
ret = ret2;
if (pos + len > inode->i_size) {
- ext4_truncate(inode);
+ ext4_truncate_failed_write(inode);
/*
* If truncate failed early the inode might still be
* on the orphan list; we need to make sure the inode
@@ -2788,7 +2800,7 @@ static int ext4_da_writepages_trans_blocks(struct inode *inode)
* number of contiguous block. So we will limit
* number of contiguous block to a sane value
*/
- if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
+ if (!(EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL) &&
(max_blocks > EXT4_MAX_TRANS_DATA))
max_blocks = EXT4_MAX_TRANS_DATA;
@@ -3091,7 +3103,7 @@ retry:
* i_size_read because we hold i_mutex.
*/
if (pos + len > inode->i_size)
- ext4_truncate(inode);
+ ext4_truncate_failed_write(inode);
}
if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
@@ -4120,6 +4132,8 @@ static void ext4_clear_blocks(handle_t *handle, struct inode *inode,
__le32 *last)
{
__le32 *p;
+ int is_metadata = S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode);
+
if (try_to_extend_transaction(handle, inode)) {
if (bh) {
BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
@@ -4150,11 +4164,11 @@ static void ext4_clear_blocks(handle_t *handle, struct inode *inode,
*p = 0;
tbh = sb_find_get_block(inode->i_sb, nr);
- ext4_forget(handle, 0, inode, tbh, nr);
+ ext4_forget(handle, is_metadata, inode, tbh, nr);
}
}
- ext4_free_blocks(handle, inode, block_to_free, count, 0);
+ ext4_free_blocks(handle, inode, block_to_free, count, is_metadata);
}
/**
@@ -4781,8 +4795,8 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
struct ext4_iloc iloc;
struct ext4_inode *raw_inode;
struct ext4_inode_info *ei;
- struct buffer_head *bh;
struct inode *inode;
+ journal_t *journal = EXT4_SB(sb)->s_journal;
long ret;
int block;
@@ -4793,11 +4807,11 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
return inode;
ei = EXT4_I(inode);
+ iloc.bh = 0;
ret = __ext4_get_inode_loc(inode, &iloc, 0);
if (ret < 0)
goto bad_inode;
- bh = iloc.bh;
raw_inode = ext4_raw_inode(&iloc);
inode->i_mode = le16_to_cpu(raw_inode->i_mode);
inode->i_uid = (uid_t)le16_to_cpu(raw_inode->i_uid_low);
@@ -4820,7 +4834,6 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
if (inode->i_mode == 0 ||
!(EXT4_SB(inode->i_sb)->s_mount_state & EXT4_ORPHAN_FS)) {
/* this inode is deleted */
- brelse(bh);
ret = -ESTALE;
goto bad_inode;
}
@@ -4848,11 +4861,35 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
ei->i_data[block] = raw_inode->i_block[block];
INIT_LIST_HEAD(&ei->i_orphan);
+ /*
+ * Set transaction id's of transactions that have to be committed
+ * to finish f[data]sync. We set them to currently running transaction
+ * as we cannot be sure that the inode or some of its metadata isn't
+ * part of the transaction - the inode could have been reclaimed and
+ * now it is reread from disk.
+ */
+ if (journal) {
+ transaction_t *transaction;
+ tid_t tid;
+
+ spin_lock(&journal->j_state_lock);
+ if (journal->j_running_transaction)
+ transaction = journal->j_running_transaction;
+ else
+ transaction = journal->j_committing_transaction;
+ if (transaction)
+ tid = transaction->t_tid;
+ else
+ tid = journal->j_commit_sequence;
+ spin_unlock(&journal->j_state_lock);
+ ei->i_sync_tid = tid;
+ ei->i_datasync_tid = tid;
+ }
+
if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE) {
ei->i_extra_isize = le16_to_cpu(raw_inode->i_extra_isize);
if (EXT4_GOOD_OLD_INODE_SIZE + ei->i_extra_isize >
EXT4_INODE_SIZE(inode->i_sb)) {
- brelse(bh);
ret = -EIO;
goto bad_inode;
}
@@ -4884,10 +4921,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
ret = 0;
if (ei->i_file_acl &&
- ((ei->i_file_acl <
- (le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) +
- EXT4_SB(sb)->s_gdb_count)) ||
- (ei->i_file_acl >= ext4_blocks_count(EXT4_SB(sb)->s_es)))) {
+ !ext4_data_block_valid(EXT4_SB(sb), ei->i_file_acl, 1)) {
ext4_error(sb, __func__,
"bad extended attribute block %llu in inode #%lu",
ei->i_file_acl, inode->i_ino);
@@ -4905,10 +4939,8 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
/* Validate block references which are part of inode */
ret = ext4_check_inode_blockref(inode);
}
- if (ret) {
- brelse(bh);
+ if (ret)
goto bad_inode;
- }
if (S_ISREG(inode->i_mode)) {
inode->i_op = &ext4_file_inode_operations;
@@ -4936,7 +4968,6 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
init_special_inode(inode, inode->i_mode,
new_decode_dev(le32_to_cpu(raw_inode->i_block[1])));
} else {
- brelse(bh);
ret = -EIO;
ext4_error(inode->i_sb, __func__,
"bogus i_mode (%o) for inode=%lu",
@@ -4949,6 +4980,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
return inode;
bad_inode:
+ brelse(iloc.bh);
iget_failed(inode);
return ERR_PTR(ret);
}
@@ -5108,6 +5140,7 @@ static int ext4_do_update_inode(handle_t *handle,
err = rc;
ei->i_state &= ~EXT4_STATE_NEW;
+ ext4_update_inode_fsync_trans(handle, inode, 0);
out_brelse:
brelse(bh);
ext4_std_error(inode->i_sb, err);
@@ -5227,8 +5260,8 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
/* (user+group)*(old+new) structure, inode write (sb,
* inode block, ? - but truncate inode update has it) */
- handle = ext4_journal_start(inode, 2*(EXT4_QUOTA_INIT_BLOCKS(inode->i_sb)+
- EXT4_QUOTA_DEL_BLOCKS(inode->i_sb))+3);
+ handle = ext4_journal_start(inode, (EXT4_MAXQUOTAS_INIT_BLOCKS(inode->i_sb)+
+ EXT4_MAXQUOTAS_DEL_BLOCKS(inode->i_sb))+3);
if (IS_ERR(handle)) {
error = PTR_ERR(handle);
goto err_out;
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index c1cdf61..b63d193 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -221,31 +221,38 @@ setversion_out:
struct file *donor_filp;
int err;
+ if (!(filp->f_mode & FMODE_READ) ||
+ !(filp->f_mode & FMODE_WRITE))
+ return -EBADF;
+
if (copy_from_user(&me,
(struct move_extent __user *)arg, sizeof(me)))
return -EFAULT;
+ me.moved_len = 0;
donor_filp = fget(me.donor_fd);
if (!donor_filp)
return -EBADF;
- if (!capable(CAP_DAC_OVERRIDE)) {
- if ((current->real_cred->fsuid != inode->i_uid) ||
- !(inode->i_mode & S_IRUSR) ||
- !(donor_filp->f_dentry->d_inode->i_mode &
- S_IRUSR)) {
- fput(donor_filp);
- return -EACCES;
- }
+ if (!(donor_filp->f_mode & FMODE_WRITE)) {
+ err = -EBADF;
+ goto mext_out;
}
+ err = mnt_want_write(filp->f_path.mnt);
+ if (err)
+ goto mext_out;
+
err = ext4_move_extents(filp, donor_filp, me.orig_start,
me.donor_start, me.len, &me.moved_len);
- fput(donor_filp);
+ mnt_drop_write(filp->f_path.mnt);
+ if (me.moved_len > 0)
+ file_remove_suid(donor_filp);
if (copy_to_user((struct move_extent *)arg, &me, sizeof(me)))
- return -EFAULT;
-
+ err = -EFAULT;
+mext_out:
+ fput(donor_filp);
return err;
}
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index bba1282..7d71148 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2529,7 +2529,6 @@ static void release_blocks_on_commit(journal_t *journal, transaction_t *txn)
struct ext4_group_info *db;
int err, count = 0, count2 = 0;
struct ext4_free_data *entry;
- ext4_fsblk_t discard_block;
struct list_head *l, *ltmp;
list_for_each_safe(l, ltmp, &txn->t_private_list) {
@@ -2559,13 +2558,19 @@ static void release_blocks_on_commit(journal_t *journal, transaction_t *txn)
page_cache_release(e4b.bd_bitmap_page);
}
ext4_unlock_group(sb, entry->group);
- discard_block = (ext4_fsblk_t) entry->group * EXT4_BLOCKS_PER_GROUP(sb)
- + entry->start_blk
- + le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block);
- trace_ext4_discard_blocks(sb, (unsigned long long)discard_block,
- entry->count);
- sb_issue_discard(sb, discard_block, entry->count);
-
+ if (test_opt(sb, DISCARD)) {
+ ext4_fsblk_t discard_block;
+ struct ext4_super_block *es = EXT4_SB(sb)->s_es;
+
+ discard_block = (ext4_fsblk_t)entry->group *
+ EXT4_BLOCKS_PER_GROUP(sb)
+ + entry->start_blk
+ + le32_to_cpu(es->s_first_data_block);
+ trace_ext4_discard_blocks(sb,
+ (unsigned long long)discard_block,
+ entry->count);
+ sb_issue_discard(sb, discard_block, entry->count);
+ }
kmem_cache_free(ext4_free_ext_cachep, entry);
ext4_mb_release_desc(&e4b);
}
@@ -3006,6 +3011,24 @@ static void ext4_mb_collect_stats(struct ext4_allocation_context *ac)
}
/*
+ * Called on failure; free up any blocks from the inode PA for this
+ * context. We don't need this for MB_GROUP_PA because we only change
+ * pa_free in ext4_mb_release_context(), but on failure, we've already
+ * zeroed out ac->ac_b_ex.fe_len, so group_pa->pa_free is not changed.
+ */
+static void ext4_discard_allocated_blocks(struct ext4_allocation_context *ac)
+{
+ struct ext4_prealloc_space *pa = ac->ac_pa;
+ int len;
+
+ if (pa && pa->pa_type == MB_INODE_PA) {
+ len = ac->ac_b_ex.fe_len;
+ pa->pa_free += len;
+ }
+
+}
+
+/*
* use blocks preallocated to inode
*/
static void ext4_mb_use_inode_pa(struct ext4_allocation_context *ac,
@@ -4290,6 +4313,7 @@ repeat:
ac->ac_status = AC_STATUS_CONTINUE;
goto repeat;
} else if (*errp) {
+ ext4_discard_allocated_blocks(ac);
ac->ac_b_ex.fe_len = 0;
ar->len = 0;
ext4_mb_show_ac(ac);
diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c
index a93d5b8..8646149 100644
--- a/fs/ext4/migrate.c
+++ b/fs/ext4/migrate.c
@@ -238,7 +238,7 @@ static int extend_credit_for_blkdel(handle_t *handle, struct inode *inode)
* So allocate a credit of 3. We may update
* quota (user and group).
*/
- needed = 3 + 2*EXT4_QUOTA_TRANS_BLOCKS(inode->i_sb);
+ needed = 3 + EXT4_MAXQUOTAS_TRANS_BLOCKS(inode->i_sb);
if (ext4_journal_extend(handle, needed) != 0)
retval = ext4_journal_restart(handle, needed);
@@ -477,7 +477,7 @@ int ext4_ext_migrate(struct inode *inode)
handle = ext4_journal_start(inode,
EXT4_DATA_TRANS_BLOCKS(inode->i_sb) +
EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
- 2 * EXT4_QUOTA_INIT_BLOCKS(inode->i_sb)
+ EXT4_MAXQUOTAS_INIT_BLOCKS(inode->i_sb)
+ 1);
if (IS_ERR(handle)) {
retval = PTR_ERR(handle);
diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
index 25b6b14..f5b03a1 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -77,12 +77,14 @@ static int
mext_next_extent(struct inode *inode, struct ext4_ext_path *path,
struct ext4_extent **extent)
{
+ struct ext4_extent_header *eh;
int ppos, leaf_ppos = path->p_depth;
ppos = leaf_ppos;
if (EXT_LAST_EXTENT(path[ppos].p_hdr) > path[ppos].p_ext) {
/* leaf block */
*extent = ++path[ppos].p_ext;
+ path[ppos].p_block = ext_pblock(path[ppos].p_ext);
return 0;
}
@@ -119,9 +121,18 @@ mext_next_extent(struct inode *inode, struct ext4_ext_path *path,
ext_block_hdr(path[cur_ppos+1].p_bh);
}
+ path[leaf_ppos].p_ext = *extent = NULL;
+
+ eh = path[leaf_ppos].p_hdr;
+ if (le16_to_cpu(eh->eh_entries) == 0)
+ /* empty leaf is found */
+ return -ENODATA;
+
/* leaf block */
path[leaf_ppos].p_ext = *extent =
EXT_FIRST_EXTENT(path[leaf_ppos].p_hdr);
+ path[leaf_ppos].p_block =
+ ext_pblock(path[leaf_ppos].p_ext);
return 0;
}
}
@@ -155,40 +166,15 @@ mext_check_null_inode(struct inode *inode1, struct inode *inode2,
}
/**
- * mext_double_down_read - Acquire two inodes' read semaphore
- *
- * @orig_inode: original inode structure
- * @donor_inode: donor inode structure
- * Acquire read semaphore of the two inodes (orig and donor) by i_ino order.
- */
-static void
-mext_double_down_read(struct inode *orig_inode, struct inode *donor_inode)
-{
- struct inode *first = orig_inode, *second = donor_inode;
-
- /*
- * Use the inode number to provide the stable locking order instead
- * of its address, because the C language doesn't guarantee you can
- * compare pointers that don't come from the same array.
- */
- if (donor_inode->i_ino < orig_inode->i_ino) {
- first = donor_inode;
- second = orig_inode;
- }
-
- down_read(&EXT4_I(first)->i_data_sem);
- down_read(&EXT4_I(second)->i_data_sem);
-}
-
-/**
- * mext_double_down_write - Acquire two inodes' write semaphore
+ * double_down_write_data_sem - Acquire two inodes' write lock of i_data_sem
*
* @orig_inode: original inode structure
* @donor_inode: donor inode structure
- * Acquire write semaphore of the two inodes (orig and donor) by i_ino order.
+ * Acquire write lock of i_data_sem of the two inodes (orig and donor) by
+ * i_ino order.
*/
static void
-mext_double_down_write(struct inode *orig_inode, struct inode *donor_inode)
+double_down_write_data_sem(struct inode *orig_inode, struct inode *donor_inode)
{
struct inode *first = orig_inode, *second = donor_inode;
@@ -203,32 +189,18 @@ mext_double_down_write(struct inode *orig_inode, struct inode *donor_inode)
}
down_write(&EXT4_I(first)->i_data_sem);
- down_write(&EXT4_I(second)->i_data_sem);
+ down_write_nested(&EXT4_I(second)->i_data_sem, SINGLE_DEPTH_NESTING);
}
/**
- * mext_double_up_read - Release two inodes' read semaphore
+ * double_up_write_data_sem - Release two inodes' write lock of i_data_sem
*
* @orig_inode: original inode structure to be released its lock first
* @donor_inode: donor inode structure to be released its lock second
- * Release read semaphore of two inodes (orig and donor).
+ * Release write lock of i_data_sem of two inodes (orig and donor).
*/
static void
-mext_double_up_read(struct inode *orig_inode, struct inode *donor_inode)
-{
- up_read(&EXT4_I(orig_inode)->i_data_sem);
- up_read(&EXT4_I(donor_inode)->i_data_sem);
-}
-
-/**
- * mext_double_up_write - Release two inodes' write semaphore
- *
- * @orig_inode: original inode structure to be released its lock first
- * @donor_inode: donor inode structure to be released its lock second
- * Release write semaphore of two inodes (orig and donor).
- */
-static void
-mext_double_up_write(struct inode *orig_inode, struct inode *donor_inode)
+double_up_write_data_sem(struct inode *orig_inode, struct inode *donor_inode)
{
up_write(&EXT4_I(orig_inode)->i_data_sem);
up_write(&EXT4_I(donor_inode)->i_data_sem);
@@ -661,6 +633,7 @@ mext_calc_swap_extents(struct ext4_extent *tmp_dext,
* @donor_inode: donor inode
* @from: block offset of orig_inode
* @count: block count to be replaced
+ * @err: pointer to save return value
*
* Replace original inode extents and donor inode extents page by page.
* We implement this replacement in the following three steps:
@@ -671,33 +644,33 @@ mext_calc_swap_extents(struct ext4_extent *tmp_dext,
* 3. Change the block information of donor inode to point at the saved
* original inode blocks in the dummy extents.
*
- * Return 0 on success, or a negative error value on failure.
+ * Return replaced block count.
*/
static int
mext_replace_branches(handle_t *handle, struct inode *orig_inode,
struct inode *donor_inode, ext4_lblk_t from,
- ext4_lblk_t count)
+ ext4_lblk_t count, int *err)
{
struct ext4_ext_path *orig_path = NULL;
struct ext4_ext_path *donor_path = NULL;
struct ext4_extent *oext, *dext;
struct ext4_extent tmp_dext, tmp_oext;
ext4_lblk_t orig_off = from, donor_off = from;
- int err = 0;
int depth;
int replaced_count = 0;
int dext_alen;
- mext_double_down_write(orig_inode, donor_inode);
+ /* Protect extent trees against block allocations via delalloc */
+ double_down_write_data_sem(orig_inode, donor_inode);
/* Get the original extent for the block "orig_off" */
- err = get_ext_path(orig_inode, orig_off, &orig_path);
- if (err)
+ *err = get_ext_path(orig_inode, orig_off, &orig_path);
+ if (*err)
goto out;
/* Get the donor extent for the head */
- err = get_ext_path(donor_inode, donor_off, &donor_path);
- if (err)
+ *err = get_ext_path(donor_inode, donor_off, &donor_path);
+ if (*err)
goto out;
depth = ext_depth(orig_inode);
oext = orig_path[depth].p_ext;
@@ -707,9 +680,9 @@ mext_replace_branches(handle_t *handle, struct inode *orig_inode,
dext = donor_path[depth].p_ext;
tmp_dext = *dext;
- err = mext_calc_swap_extents(&tmp_dext, &tmp_oext, orig_off,
+ *err = mext_calc_swap_extents(&tmp_dext, &tmp_oext, orig_off,
donor_off, count);
- if (err)
+ if (*err)
goto out;
/* Loop for the donor extents */
@@ -718,7 +691,7 @@ mext_replace_branches(handle_t *handle, struct inode *orig_inode,
if (!dext) {
ext4_error(donor_inode->i_sb, __func__,
"The extent for donor must be found");
- err = -EIO;
+ *err = -EIO;
goto out;
} else if (donor_off != le32_to_cpu(tmp_dext.ee_block)) {
ext4_error(donor_inode->i_sb, __func__,
@@ -726,20 +699,20 @@ mext_replace_branches(handle_t *handle, struct inode *orig_inode,
"extent(%u) should be equal",
donor_off,
le32_to_cpu(tmp_dext.ee_block));
- err = -EIO;
+ *err = -EIO;
goto out;
}
/* Set donor extent to orig extent */
- err = mext_leaf_block(handle, orig_inode,
+ *err = mext_leaf_block(handle, orig_inode,
orig_path, &tmp_dext, &orig_off);
- if (err < 0)
+ if (*err)
goto out;
/* Set orig extent to donor extent */
- err = mext_leaf_block(handle, donor_inode,
+ *err = mext_leaf_block(handle, donor_inode,
donor_path, &tmp_oext, &donor_off);
- if (err < 0)
+ if (*err)
goto out;
dext_alen = ext4_ext_get_actual_len(&tmp_dext);
@@ -753,35 +726,25 @@ mext_replace_branches(handle_t *handle, struct inode *orig_inode,
if (orig_path)
ext4_ext_drop_refs(orig_path);
- err = get_ext_path(orig_inode, orig_off, &orig_path);
- if (err)
+ *err = get_ext_path(orig_inode, orig_off, &orig_path);
+ if (*err)
goto out;
depth = ext_depth(orig_inode);
oext = orig_path[depth].p_ext;
- if (le32_to_cpu(oext->ee_block) +
- ext4_ext_get_actual_len(oext) <= orig_off) {
- err = 0;
- goto out;
- }
tmp_oext = *oext;
if (donor_path)
ext4_ext_drop_refs(donor_path);
- err = get_ext_path(donor_inode, donor_off, &donor_path);
- if (err)
+ *err = get_ext_path(donor_inode, donor_off, &donor_path);
+ if (*err)
goto out;
depth = ext_depth(donor_inode);
dext = donor_path[depth].p_ext;
- if (le32_to_cpu(dext->ee_block) +
- ext4_ext_get_actual_len(dext) <= donor_off) {
- err = 0;
- goto out;
- }
tmp_dext = *dext;
- err = mext_calc_swap_extents(&tmp_dext, &tmp_oext, orig_off,
+ *err = mext_calc_swap_extents(&tmp_dext, &tmp_oext, orig_off,
donor_off, count - replaced_count);
- if (err)
+ if (*err)
goto out;
}
@@ -795,8 +758,12 @@ out:
kfree(donor_path);
}
- mext_double_up_write(orig_inode, donor_inode);
- return err;
+ ext4_ext_invalidate_cache(orig_inode);
+ ext4_ext_invalidate_cache(donor_inode);
+
+ double_up_write_data_sem(orig_inode, donor_inode);
+
+ return replaced_count;
}
/**
@@ -808,16 +775,17 @@ out:
* @data_offset_in_page: block index where data swapping starts
* @block_len_in_page: the number of blocks to be swapped
* @uninit: orig extent is uninitialized or not
+ * @err: pointer to save return value
*
* Save the data in original inode blocks and replace original inode extents
* with donor inode extents by calling mext_replace_branches().
- * Finally, write out the saved data in new original inode blocks. Return 0
- * on success, or a negative error value on failure.
+ * Finally, write out the saved data in new original inode blocks. Return
+ * replaced block count.
*/
static int
move_extent_per_page(struct file *o_filp, struct inode *donor_inode,
pgoff_t orig_page_offset, int data_offset_in_page,
- int block_len_in_page, int uninit)
+ int block_len_in_page, int uninit, int *err)
{
struct inode *orig_inode = o_filp->f_dentry->d_inode;
struct address_space *mapping = orig_inode->i_mapping;
@@ -829,9 +797,11 @@ move_extent_per_page(struct file *o_filp, struct inode *donor_inode,
long long offs = orig_page_offset << PAGE_CACHE_SHIFT;
unsigned long blocksize = orig_inode->i_sb->s_blocksize;
unsigned int w_flags = 0;
- unsigned int tmp_data_len, data_len;
+ unsigned int tmp_data_size, data_size, replaced_size;
void *fsdata;
- int ret, i, jblocks;
+ int i, jblocks;
+ int err2 = 0;
+ int replaced_count = 0;
int blocks_per_page = PAGE_CACHE_SIZE >> orig_inode->i_blkbits;
/*
@@ -841,8 +811,8 @@ move_extent_per_page(struct file *o_filp, struct inode *donor_inode,
jblocks = ext4_writepage_trans_blocks(orig_inode) * 2;
handle = ext4_journal_start(orig_inode, jblocks);
if (IS_ERR(handle)) {
- ret = PTR_ERR(handle);
- return ret;
+ *err = PTR_ERR(handle);
+ return 0;
}
if (segment_eq(get_fs(), KERNEL_DS))
@@ -858,39 +828,36 @@ move_extent_per_page(struct file *o_filp, struct inode *donor_inode,
* Just swap data blocks between orig and donor.
*/
if (uninit) {
- ret = mext_replace_branches(handle, orig_inode,
- donor_inode, orig_blk_offset,
- block_len_in_page);
-
- /* Clear the inode cache not to refer to the old data */
- ext4_ext_invalidate_cache(orig_inode);
- ext4_ext_invalidate_cache(donor_inode);
+ replaced_count = mext_replace_branches(handle, orig_inode,
+ donor_inode, orig_blk_offset,
+ block_len_in_page, err);
goto out2;
}
offs = (long long)orig_blk_offset << orig_inode->i_blkbits;
- /* Calculate data_len */
+ /* Calculate data_size */
if ((orig_blk_offset + block_len_in_page - 1) ==
((orig_inode->i_size - 1) >> orig_inode->i_blkbits)) {
/* Replace the last block */
- tmp_data_len = orig_inode->i_size & (blocksize - 1);
+ tmp_data_size = orig_inode->i_size & (blocksize - 1);
/*
- * If data_len equal zero, it shows data_len is multiples of
+ * If data_size equal zero, it shows data_size is multiples of
* blocksize. So we set appropriate value.
*/
- if (tmp_data_len == 0)
- tmp_data_len = blocksize;
+ if (tmp_data_size == 0)
+ tmp_data_size = blocksize;
- data_len = tmp_data_len +
+ data_size = tmp_data_size +
((block_len_in_page - 1) << orig_inode->i_blkbits);
- } else {
- data_len = block_len_in_page << orig_inode->i_blkbits;
- }
+ } else
+ data_size = block_len_in_page << orig_inode->i_blkbits;
+
+ replaced_size = data_size;
- ret = a_ops->write_begin(o_filp, mapping, offs, data_len, w_flags,
+ *err = a_ops->write_begin(o_filp, mapping, offs, data_size, w_flags,
&page, &fsdata);
- if (unlikely(ret < 0))
+ if (unlikely(*err < 0))
goto out;
if (!PageUptodate(page)) {
@@ -911,14 +878,17 @@ move_extent_per_page(struct file *o_filp, struct inode *donor_inode,
/* Release old bh and drop refs */
try_to_release_page(page, 0);
- ret = mext_replace_branches(handle, orig_inode, donor_inode,
- orig_blk_offset, block_len_in_page);
- if (ret < 0)
- goto out;
-
- /* Clear the inode cache not to refer to the old data */
- ext4_ext_invalidate_cache(orig_inode);
- ext4_ext_invalidate_cache(donor_inode);
+ replaced_count = mext_replace_branches(handle, orig_inode, donor_inode,
+ orig_blk_offset, block_len_in_page,
+ &err2);
+ if (err2) {
+ if (replaced_count) {
+ block_len_in_page = replaced_count;
+ replaced_size =
+ block_len_in_page << orig_inode->i_blkbits;
+ } else
+ goto out;
+ }
if (!page_has_buffers(page))
create_empty_buffers(page, 1 << orig_inode->i_blkbits, 0);
@@ -928,16 +898,16 @@ move_extent_per_page(struct file *o_filp, struct inode *donor_inode,
bh = bh->b_this_page;
for (i = 0; i < block_len_in_page; i++) {
- ret = ext4_get_block(orig_inode,
+ *err = ext4_get_block(orig_inode,
(sector_t)(orig_blk_offset + i), bh, 0);
- if (ret < 0)
+ if (*err < 0)
goto out;
if (bh->b_this_page != NULL)
bh = bh->b_this_page;
}
- ret = a_ops->write_end(o_filp, mapping, offs, data_len, data_len,
+ *err = a_ops->write_end(o_filp, mapping, offs, data_size, replaced_size,
page, fsdata);
page = NULL;
@@ -951,7 +921,10 @@ out:
out2:
ext4_journal_stop(handle);
- return ret < 0 ? ret : 0;
+ if (err2)
+ *err = err2;
+
+ return replaced_count;
}
/**
@@ -962,7 +935,6 @@ out2:
* @orig_start: logical start offset in block for orig
* @donor_start: logical start offset in block for donor
* @len: the number of blocks to be moved
- * @moved_len: moved block length
*
* Check the arguments of ext4_move_extents() whether the files can be
* exchanged with each other.
@@ -970,8 +942,8 @@ out2:
*/
static int
mext_check_arguments(struct inode *orig_inode,
- struct inode *donor_inode, __u64 orig_start,
- __u64 donor_start, __u64 *len, __u64 moved_len)
+ struct inode *donor_inode, __u64 orig_start,
+ __u64 donor_start, __u64 *len)
{
ext4_lblk_t orig_blocks, donor_blocks;
unsigned int blkbits = orig_inode->i_blkbits;
@@ -985,6 +957,13 @@ mext_check_arguments(struct inode *orig_inode,
return -EINVAL;
}
+ if (donor_inode->i_mode & (S_ISUID|S_ISGID)) {
+ ext4_debug("ext4 move extent: suid or sgid is set"
+ " to donor file [ino:orig %lu, donor %lu]\n",
+ orig_inode->i_ino, donor_inode->i_ino);
+ return -EINVAL;
+ }
+
/* Ext4 move extent does not support swapfile */
if (IS_SWAPFILE(orig_inode) || IS_SWAPFILE(donor_inode)) {
ext4_debug("ext4 move extent: The argument files should "
@@ -1025,13 +1004,6 @@ mext_check_arguments(struct inode *orig_inode,
return -EINVAL;
}
- if (moved_len) {
- ext4_debug("ext4 move extent: moved_len should be 0 "
- "[ino:orig %lu, donor %lu]\n", orig_inode->i_ino,
- donor_inode->i_ino);
- return -EINVAL;
- }
-
if ((orig_start > EXT_MAX_BLOCK) ||
(donor_start > EXT_MAX_BLOCK) ||
(*len > EXT_MAX_BLOCK) ||
@@ -1232,16 +1204,16 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp,
return -EINVAL;
}
- /* protect orig and donor against a truncate */
+ /* Protect orig and donor inodes against a truncate */
ret1 = mext_inode_double_lock(orig_inode, donor_inode);
if (ret1 < 0)
return ret1;
- mext_double_down_read(orig_inode, donor_inode);
+ /* Protect extent tree against block allocations via delalloc */
+ double_down_write_data_sem(orig_inode, donor_inode);
/* Check the filesystem environment whether move_extent can be done */
ret1 = mext_check_arguments(orig_inode, donor_inode, orig_start,
- donor_start, &len, *moved_len);
- mext_double_up_read(orig_inode, donor_inode);
+ donor_start, &len);
if (ret1)
goto out;
@@ -1355,36 +1327,39 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp,
seq_start = le32_to_cpu(ext_cur->ee_block);
rest_blocks = seq_blocks;
- /* Discard preallocations of two inodes */
- down_write(&EXT4_I(orig_inode)->i_data_sem);
- ext4_discard_preallocations(orig_inode);
- up_write(&EXT4_I(orig_inode)->i_data_sem);
-
- down_write(&EXT4_I(donor_inode)->i_data_sem);
- ext4_discard_preallocations(donor_inode);
- up_write(&EXT4_I(donor_inode)->i_data_sem);
+ /*
+ * Up semaphore to avoid following problems:
+ * a. transaction deadlock among ext4_journal_start,
+ * ->write_begin via pagefault, and jbd2_journal_commit
+ * b. racing with ->readpage, ->write_begin, and ext4_get_block
+ * in move_extent_per_page
+ */
+ double_up_write_data_sem(orig_inode, donor_inode);
while (orig_page_offset <= seq_end_page) {
/* Swap original branches with new branches */
- ret1 = move_extent_per_page(o_filp, donor_inode,
+ block_len_in_page = move_extent_per_page(
+ o_filp, donor_inode,
orig_page_offset,
data_offset_in_page,
- block_len_in_page, uninit);
- if (ret1 < 0)
- goto out;
- orig_page_offset++;
+ block_len_in_page, uninit,
+ &ret1);
+
/* Count how many blocks we have exchanged */
*moved_len += block_len_in_page;
+ if (ret1 < 0)
+ break;
if (*moved_len > len) {
ext4_error(orig_inode->i_sb, __func__,
"We replaced blocks too much! "
"sum of replaced: %llu requested: %llu",
*moved_len, len);
ret1 = -EIO;
- goto out;
+ break;
}
+ orig_page_offset++;
data_offset_in_page = 0;
rest_blocks -= block_len_in_page;
if (rest_blocks > blocks_per_page)
@@ -1393,6 +1368,10 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp,
block_len_in_page = rest_blocks;
}
+ double_down_write_data_sem(orig_inode, donor_inode);
+ if (ret1 < 0)
+ break;
+
/* Decrease buffer counter */
if (holecheck_path)
ext4_ext_drop_refs(holecheck_path);
@@ -1414,6 +1393,11 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp,
}
out:
+ if (*moved_len) {
+ ext4_discard_preallocations(orig_inode);
+ ext4_discard_preallocations(donor_inode);
+ }
+
if (orig_path) {
ext4_ext_drop_refs(orig_path);
kfree(orig_path);
@@ -1422,7 +1406,7 @@ out:
ext4_ext_drop_refs(holecheck_path);
kfree(holecheck_path);
}
-
+ double_up_write_data_sem(orig_inode, donor_inode);
ret2 = mext_inode_double_unlock(orig_inode, donor_inode);
if (ret1)
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 6d2c1b8..17a17e1 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1292,9 +1292,6 @@ errout:
* add_dirent_to_buf will attempt search the directory block for
* space. It will return -ENOSPC if no space is available, and -EIO
* and -EEXIST if directory entry already exists.
- *
- * NOTE! bh is NOT released in the case where ENOSPC is returned. In
- * all other cases bh is released.
*/
static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
struct inode *inode, struct ext4_dir_entry_2 *de,
@@ -1315,14 +1312,10 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
top = bh->b_data + blocksize - reclen;
while ((char *) de <= top) {
if (!ext4_check_dir_entry("ext4_add_entry", dir, de,
- bh, offset)) {
- brelse(bh);
+ bh, offset))
return -EIO;
- }
- if (ext4_match(namelen, name, de)) {
- brelse(bh);
+ if (ext4_match(namelen, name, de))
return -EEXIST;
- }
nlen = EXT4_DIR_REC_LEN(de->name_len);
rlen = ext4_rec_len_from_disk(de->rec_len, blocksize);
if ((de->inode? rlen - nlen: rlen) >= reclen)
@@ -1337,7 +1330,6 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
err = ext4_journal_get_write_access(handle, bh);
if (err) {
ext4_std_error(dir->i_sb, err);
- brelse(bh);
return err;
}
@@ -1377,7 +1369,6 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
err = ext4_handle_dirty_metadata(handle, dir, bh);
if (err)
ext4_std_error(dir->i_sb, err);
- brelse(bh);
return 0;
}
@@ -1471,7 +1462,9 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry,
if (!(de))
return retval;
- return add_dirent_to_buf(handle, dentry, inode, de, bh);
+ retval = add_dirent_to_buf(handle, dentry, inode, de, bh);
+ brelse(bh);
+ return retval;
}
/*
@@ -1514,8 +1507,10 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
if(!bh)
return retval;
retval = add_dirent_to_buf(handle, dentry, inode, NULL, bh);
- if (retval != -ENOSPC)
+ if (retval != -ENOSPC) {
+ brelse(bh);
return retval;
+ }
if (blocks == 1 && !dx_fallback &&
EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX))
@@ -1528,7 +1523,9 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
de = (struct ext4_dir_entry_2 *) bh->b_data;
de->inode = 0;
de->rec_len = ext4_rec_len_to_disk(blocksize, blocksize);
- return add_dirent_to_buf(handle, dentry, inode, de, bh);
+ retval = add_dirent_to_buf(handle, dentry, inode, de, bh);
+ brelse(bh);
+ return retval;
}
/*
@@ -1561,10 +1558,8 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
goto journal_error;
err = add_dirent_to_buf(handle, dentry, inode, NULL, bh);
- if (err != -ENOSPC) {
- bh = NULL;
+ if (err != -ENOSPC)
goto cleanup;
- }
/* Block full, should compress but for now just split */
dxtrace(printk(KERN_DEBUG "using %u of %u node entries\n",
@@ -1657,7 +1652,6 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
if (!de)
goto cleanup;
err = add_dirent_to_buf(handle, dentry, inode, de, bh);
- bh = NULL;
goto cleanup;
journal_error:
@@ -1775,7 +1769,7 @@ static int ext4_create(struct inode *dir, struct dentry *dentry, int mode,
retry:
handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
- 2*EXT4_QUOTA_INIT_BLOCKS(dir->i_sb));
+ EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb));
if (IS_ERR(handle))
return PTR_ERR(handle);
@@ -1809,7 +1803,7 @@ static int ext4_mknod(struct inode *dir, struct dentry *dentry,
retry:
handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
- 2*EXT4_QUOTA_INIT_BLOCKS(dir->i_sb));
+ EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb));
if (IS_ERR(handle))
return PTR_ERR(handle);
@@ -1846,7 +1840,7 @@ static int ext4_mkdir(struct inode *dir, struct dentry *dentry, int mode)
retry:
handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
- 2*EXT4_QUOTA_INIT_BLOCKS(dir->i_sb));
+ EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb));
if (IS_ERR(handle))
return PTR_ERR(handle);
@@ -2259,7 +2253,7 @@ static int ext4_symlink(struct inode *dir,
retry:
handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
EXT4_INDEX_EXTRA_TRANS_BLOCKS + 5 +
- 2*EXT4_QUOTA_INIT_BLOCKS(dir->i_sb));
+ EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb));
if (IS_ERR(handle))
return PTR_ERR(handle);
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 3cfc343..3b2c554 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -247,7 +247,7 @@ static int setup_new_group_blocks(struct super_block *sb,
goto exit_bh;
if (IS_ERR(gdb = bclean(handle, sb, block))) {
- err = PTR_ERR(bh);
+ err = PTR_ERR(gdb);
goto exit_bh;
}
ext4_handle_dirty_metadata(handle, NULL, gdb);
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index d4ca92a..9ae5217 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -603,10 +603,6 @@ static void ext4_put_super(struct super_block *sb)
if (sb->s_dirt)
ext4_commit_super(sb, 1);
- ext4_release_system_zone(sb);
- ext4_mb_release(sb);
- ext4_ext_release(sb);
- ext4_xattr_put_super(sb);
if (sbi->s_journal) {
err = jbd2_journal_destroy(sbi->s_journal);
sbi->s_journal = NULL;
@@ -614,6 +610,12 @@ static void ext4_put_super(struct super_block *sb)
ext4_abort(sb, __func__,
"Couldn't clean up the journal");
}
+
+ ext4_release_system_zone(sb);
+ ext4_mb_release(sb);
+ ext4_ext_release(sb);
+ ext4_xattr_put_super(sb);
+
if (!(sb->s_flags & MS_RDONLY)) {
EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
es->s_state = cpu_to_le16(sbi->s_mount_state);
@@ -704,6 +706,8 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)
spin_lock_init(&(ei->i_block_reservation_lock));
INIT_LIST_HEAD(&ei->i_aio_dio_complete_list);
ei->cur_aio_dio = NULL;
+ ei->i_sync_tid = 0;
+ ei->i_datasync_tid = 0;
return &ei->vfs_inode;
}
@@ -899,6 +903,12 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)
if (test_opt(sb, NO_AUTO_DA_ALLOC))
seq_puts(seq, ",noauto_da_alloc");
+ if (test_opt(sb, DISCARD))
+ seq_puts(seq, ",discard");
+
+ if (test_opt(sb, NOLOAD))
+ seq_puts(seq, ",norecovery");
+
ext4_show_quota_options(seq, sb);
return 0;
@@ -1079,7 +1089,8 @@ enum {
Opt_usrquota, Opt_grpquota, Opt_i_version,
Opt_stripe, Opt_delalloc, Opt_nodelalloc,
Opt_block_validity, Opt_noblock_validity,
- Opt_inode_readahead_blks, Opt_journal_ioprio
+ Opt_inode_readahead_blks, Opt_journal_ioprio,
+ Opt_discard, Opt_nodiscard,
};
static const match_table_t tokens = {
@@ -1104,6 +1115,7 @@ static const match_table_t tokens = {
{Opt_acl, "acl"},
{Opt_noacl, "noacl"},
{Opt_noload, "noload"},
+ {Opt_noload, "norecovery"},
{Opt_nobh, "nobh"},
{Opt_bh, "bh"},
{Opt_commit, "commit=%u"},
@@ -1144,6 +1156,8 @@ static const match_table_t tokens = {
{Opt_auto_da_alloc, "auto_da_alloc=%u"},
{Opt_auto_da_alloc, "auto_da_alloc"},
{Opt_noauto_da_alloc, "noauto_da_alloc"},
+ {Opt_discard, "discard"},
+ {Opt_nodiscard, "nodiscard"},
{Opt_err, NULL},
};
@@ -1565,6 +1579,12 @@ set_qf_format:
else
set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC);
break;
+ case Opt_discard:
+ set_opt(sbi->s_mount_opt, DISCARD);
+ break;
+ case Opt_nodiscard:
+ clear_opt(sbi->s_mount_opt, DISCARD);
+ break;
default:
ext4_msg(sb, KERN_ERR,
"Unrecognized mount option \"%s\" "
@@ -1673,14 +1693,14 @@ static int ext4_fill_flex_info(struct super_block *sb)
size_t size;
int i;
- if (!sbi->s_es->s_log_groups_per_flex) {
+ sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex;
+ groups_per_flex = 1 << sbi->s_log_groups_per_flex;
+
+ if (groups_per_flex < 2) {
sbi->s_log_groups_per_flex = 0;
return 1;
}
- sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex;
- groups_per_flex = 1 << sbi->s_log_groups_per_flex;
-
/* We allocate both existing and potentially added groups */
flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) +
((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) <<
@@ -3668,13 +3688,11 @@ static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf)
buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last;
buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) -
percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter);
- ext4_free_blocks_count_set(es, buf->f_bfree);
buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es);
if (buf->f_bfree < ext4_r_blocks_count(es))
buf->f_bavail = 0;
buf->f_files = le32_to_cpu(es->s_inodes_count);
buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter);
- es->s_free_inodes_count = cpu_to_le32(buf->f_ffree);
buf->f_namelen = EXT4_NAME_LEN;
fsid = le64_to_cpup((void *)es->s_uuid) ^
le64_to_cpup((void *)es->s_uuid + sizeof(u64));
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index fed5b01..0257019 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -988,6 +988,10 @@ ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
if (error)
goto cleanup;
+ error = ext4_journal_get_write_access(handle, is.iloc.bh);
+ if (error)
+ goto cleanup;
+
if (EXT4_I(inode)->i_state & EXT4_STATE_NEW) {
struct ext4_inode *raw_inode = ext4_raw_inode(&is.iloc);
memset(raw_inode, 0, EXT4_SB(inode->i_sb)->s_inode_size);
@@ -1013,9 +1017,6 @@ ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
if (flags & XATTR_CREATE)
goto cleanup;
}
- error = ext4_journal_get_write_access(handle, is.iloc.bh);
- if (error)
- goto cleanup;
if (!value) {
if (!is.s.not_found)
error = ext4_xattr_ibody_set(handle, inode, &i, &is);
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index d4cfd6d..8896c1d 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -636,6 +636,10 @@ void jbd2_journal_commit_transaction(journal_t *journal)
JBUFFER_TRACE(jh, "ph3: write metadata");
flags = jbd2_journal_write_metadata_buffer(commit_transaction,
jh, &new_jh, blocknr);
+ if (flags < 0) {
+ jbd2_journal_abort(journal, flags);
+ continue;
+ }
set_bit(BH_JWrite, &jh2bh(new_jh)->b_state);
wbuf[bufs++] = jh2bh(new_jh);
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index fed8538..82c295d 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -78,6 +78,7 @@ EXPORT_SYMBOL(jbd2_journal_errno);
EXPORT_SYMBOL(jbd2_journal_ack_err);
EXPORT_SYMBOL(jbd2_journal_clear_err);
EXPORT_SYMBOL(jbd2_log_wait_commit);
+EXPORT_SYMBOL(jbd2_log_start_commit);
EXPORT_SYMBOL(jbd2_journal_start_commit);
EXPORT_SYMBOL(jbd2_journal_force_commit_nested);
EXPORT_SYMBOL(jbd2_journal_wipe);
@@ -358,6 +359,10 @@ repeat:
jbd_unlock_bh_state(bh_in);
tmp = jbd2_alloc(bh_in->b_size, GFP_NOFS);
+ if (!tmp) {
+ jbd2_journal_put_journal_head(new_jh);
+ return -ENOMEM;
+ }
jbd_lock_bh_state(bh_in);
if (jh_in->b_frozen_data) {
jbd2_free(tmp, bh_in->b_size);
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 75e6e60..0f67914 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2086,11 +2086,18 @@ static inline int is_si_special(const struct siginfo *info)
return info <= SEND_SIG_FORCED;
}
-/* True if we are on the alternate signal stack. */
-
+/*
+ * True if we are on the alternate signal stack.
+ */
static inline int on_sig_stack(unsigned long sp)
{
- return (sp - current->sas_ss_sp < current->sas_ss_size);
+#ifdef CONFIG_STACK_GROWSUP
+ return sp >= current->sas_ss_sp &&
+ sp - current->sas_ss_sp < current->sas_ss_size;
+#else
+ return sp > current->sas_ss_sp &&
+ sp - current->sas_ss_sp <= current->sas_ss_size;
+#endif
}
static inline int sas_ss_flags(unsigned long sp)
diff --git a/include/scsi/osd_protocol.h b/include/scsi/osd_protocol.h
index 2cc8e8b..6856612 100644
--- a/include/scsi/osd_protocol.h
+++ b/include/scsi/osd_protocol.h
@@ -17,6 +17,7 @@
#define __OSD_PROTOCOL_H__
#include <linux/types.h>
+#include <linux/kernel.h>
#include <asm/unaligned.h>
#include <scsi/scsi.h>
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 47941fc..0b4baba 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -677,6 +677,12 @@ struct Scsi_Host {
void *shost_data;
/*
+ * Points to the physical bus device we'd use to do DMA
+ * Needed just in case we have virtual hosts.
+ */
+ struct device *dma_dev;
+
+ /*
* We should ensure that this is aligned, both for better performance
* and also because some compilers (m68k) don't automatically force
* alignment to a long boundary.
@@ -720,7 +726,9 @@ extern int scsi_queue_work(struct Scsi_Host *, struct work_struct *);
extern void scsi_flush_work(struct Scsi_Host *);
extern struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *, int);
-extern int __must_check scsi_add_host(struct Scsi_Host *, struct device *);
+extern int __must_check scsi_add_host_with_dma(struct Scsi_Host *,
+ struct device *,
+ struct device *);
extern void scsi_scan_host(struct Scsi_Host *);
extern void scsi_rescan_device(struct device *);
extern void scsi_remove_host(struct Scsi_Host *);
@@ -731,6 +739,12 @@ extern const char *scsi_host_state_name(enum scsi_host_state);
extern u64 scsi_calculate_bounce_limit(struct Scsi_Host *);
+static inline int __must_check scsi_add_host(struct Scsi_Host *host,
+ struct device *dev)
+{
+ return scsi_add_host_with_dma(host, dev, dev);
+}
+
static inline struct device *scsi_get_device(struct Scsi_Host *shost)
{
return shost->shost_gendev.parent;
--
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