MODULE_ALIAS("ext3");
#define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type)
+
+static inline void __ext4_read_bh(struct buffer_head *bh, int op_flags,
+ bh_end_io_t *end_io)
+{
+ /*
+ * buffer's verified bit is no longer valid after reading from
+ * disk again due to write out error, clear it to make sure we
+ * recheck the buffer contents.
+ */
+ clear_buffer_verified(bh);
+
+ bh->b_end_io = end_io ? end_io : end_buffer_read_sync;
+ get_bh(bh);
+ submit_bh(REQ_OP_READ, op_flags, bh);
+}
+
+void ext4_read_bh_nowait(struct buffer_head *bh, int op_flags,
+ bh_end_io_t *end_io)
+{
+ BUG_ON(!buffer_locked(bh));
+
+ if (ext4_buffer_uptodate(bh)) {
+ unlock_buffer(bh);
+ return;
+ }
+ __ext4_read_bh(bh, op_flags, end_io);
+}
+
+int ext4_read_bh(struct buffer_head *bh, int op_flags, bh_end_io_t *end_io)
+{
+ BUG_ON(!buffer_locked(bh));
+
+ if (ext4_buffer_uptodate(bh)) {
+ unlock_buffer(bh);
+ return 0;
+ }
+
+ __ext4_read_bh(bh, op_flags, end_io);
+
+ wait_on_buffer(bh);
+ if (buffer_uptodate(bh))
+ return 0;
+ return -EIO;
+}
+
+int ext4_read_bh_lock(struct buffer_head *bh, int op_flags, bool wait)
+{
+ if (trylock_buffer(bh)) {
+ if (wait)
+ return ext4_read_bh(bh, op_flags, NULL);
+ ext4_read_bh_nowait(bh, op_flags, NULL);
+ return 0;
+ }
+ if (wait) {
+ wait_on_buffer(bh);
+ if (buffer_uptodate(bh))
+ return 0;
+ return -EIO;
+ }
+ return 0;
+}
+
/*
- * This works like sb_bread() except it uses ERR_PTR for error
+ * This works like __bread_gfp() except it uses ERR_PTR for error
* returns. Currently with sb_bread it's impossible to distinguish
* between ENOMEM and EIO situations (since both result in a NULL
* return.
*/
-struct buffer_head *
-ext4_sb_bread(struct super_block *sb, sector_t block, int op_flags)
+static struct buffer_head *__ext4_sb_bread_gfp(struct super_block *sb,
+ sector_t block, int op_flags,
+ gfp_t gfp)
{
- struct buffer_head *bh = sb_getblk(sb, block);
+ struct buffer_head *bh;
+ int ret;
+ bh = sb_getblk_gfp(sb, block, gfp);
if (bh == NULL)
return ERR_PTR(-ENOMEM);
if (ext4_buffer_uptodate(bh))
return bh;
- ll_rw_block(REQ_OP_READ, REQ_META | op_flags, 1, &bh);
- wait_on_buffer(bh);
- if (buffer_uptodate(bh))
- return bh;
- put_bh(bh);
- return ERR_PTR(-EIO);
+
+ ret = ext4_read_bh_lock(bh, REQ_META | op_flags, true);
+ if (ret) {
+ put_bh(bh);
+ return ERR_PTR(ret);
+ }
+ return bh;
+}
+
+struct buffer_head *ext4_sb_bread(struct super_block *sb, sector_t block,
+ int op_flags)
+{
+ return __ext4_sb_bread_gfp(sb, block, op_flags, __GFP_MOVABLE);
+}
+
+struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb,
+ sector_t block)
+{
+ return __ext4_sb_bread_gfp(sb, block, 0, 0);
+}
+
+void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block)
+{
+ struct buffer_head *bh = sb_getblk_gfp(sb, block, 0);
+
+ if (likely(bh)) {
+ ext4_read_bh_lock(bh, REQ_RAHEAD, false);
+ brelse(bh);
+ }
}
static int ext4_verify_csum_type(struct super_block *sb,
spin_unlock(&sbi->s_md_lock);
}
+/*
+ * This writepage callback for write_cache_pages()
+ * takes care of a few cases after page cleaning.
+ *
+ * write_cache_pages() already checks for dirty pages
+ * and calls clear_page_dirty_for_io(), which we want,
+ * to write protect the pages.
+ *
+ * However, we may have to redirty a page (see below.)
+ */
+static int ext4_journalled_writepage_callback(struct page *page,
+ struct writeback_control *wbc,
+ void *data)
+{
+ transaction_t *transaction = (transaction_t *) data;
+ struct buffer_head *bh, *head;
+ struct journal_head *jh;
+
+ bh = head = page_buffers(page);
+ do {
+ /*
+ * We have to redirty a page in these cases:
+ * 1) If buffer is dirty, it means the page was dirty because it
+ * contains a buffer that needs checkpointing. So the dirty bit
+ * needs to be preserved so that checkpointing writes the buffer
+ * properly.
+ * 2) If buffer is not part of the committing transaction
+ * (we may have just accidentally come across this buffer because
+ * inode range tracking is not exact) or if the currently running
+ * transaction already contains this buffer as well, dirty bit
+ * needs to be preserved so that the buffer gets writeprotected
+ * properly on running transaction's commit.
+ */
+ jh = bh2jh(bh);
+ if (buffer_dirty(bh) ||
+ (jh && (jh->b_transaction != transaction ||
+ jh->b_next_transaction))) {
+ redirty_page_for_writepage(wbc, page);
+ goto out;
+ }
+ } while ((bh = bh->b_this_page) != head);
+
+out:
+ return AOP_WRITEPAGE_ACTIVATE;
+}
+
+static int ext4_journalled_submit_inode_data_buffers(struct jbd2_inode *jinode)
+{
+ struct address_space *mapping = jinode->i_vfs_inode->i_mapping;
+ struct writeback_control wbc = {
+ .sync_mode = WB_SYNC_ALL,
+ .nr_to_write = LONG_MAX,
+ .range_start = jinode->i_dirty_start,
+ .range_end = jinode->i_dirty_end,
+ };
+
+ return write_cache_pages(mapping, &wbc,
+ ext4_journalled_writepage_callback,
+ jinode->i_transaction);
+}
+
+static int ext4_journal_submit_inode_data_buffers(struct jbd2_inode *jinode)
+{
+ int ret;
+
+ if (ext4_should_journal_data(jinode->i_vfs_inode))
+ ret = ext4_journalled_submit_inode_data_buffers(jinode);
+ else
+ ret = jbd2_journal_submit_inode_data_buffers(jinode);
+
+ return ret;
+}
+
+static int ext4_journal_finish_inode_data_buffers(struct jbd2_inode *jinode)
+{
+ int ret = 0;
+
+ if (!ext4_should_journal_data(jinode->i_vfs_inode))
+ ret = jbd2_journal_finish_inode_data_buffers(jinode);
+
+ return ret;
+}
+
static bool system_going_down(void)
{
return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF
Opt_dioread_nolock, Opt_dioread_lock,
Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable,
Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache,
- Opt_prefetch_block_bitmaps,
+ Opt_prefetch_block_bitmaps, Opt_no_fc,
};
static const match_table_t tokens = {
{Opt_init_itable, "init_itable=%u"},
{Opt_init_itable, "init_itable"},
{Opt_noinit_itable, "noinit_itable"},
+ {Opt_no_fc, "no_fc"},
{Opt_max_dir_size_kb, "max_dir_size_kb=%u"},
{Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
{Opt_test_dummy_encryption, "test_dummy_encryption"},
#define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3)
#define MOPT_STRING 0x0400
#define MOPT_SKIP 0x0800
+#define MOPT_2 0x1000
static const struct mount_opts {
int token;
{Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET},
{Opt_prefetch_block_bitmaps, EXT4_MOUNT_PREFETCH_BLOCK_BITMAPS,
MOPT_SET},
+ {Opt_no_fc, EXT4_MOUNT2_JOURNAL_FAST_COMMIT,
+ MOPT_CLEAR | MOPT_2 | MOPT_EXT4_ONLY},
{Opt_err, 0, 0}
};
WARN_ON(1);
return -1;
}
- if (arg != 0)
- sbi->s_mount_opt |= m->mount_opt;
- else
- sbi->s_mount_opt &= ~m->mount_opt;
+ if (m->flags & MOPT_2) {
+ if (arg != 0)
+ sbi->s_mount_opt2 |= m->mount_opt;
+ else
+ sbi->s_mount_opt2 &= ~m->mount_opt;
+ } else {
+ if (arg != 0)
+ sbi->s_mount_opt |= m->mount_opt;
+ else
+ sbi->s_mount_opt &= ~m->mount_opt;
+ }
}
return 1;
}
SEQ_OPTS_PUTS("dax=inode");
}
+ if (test_opt2(sb, JOURNAL_FAST_COMMIT))
+ SEQ_OPTS_PUTS("fast_commit");
+
ext4_show_quota_options(seq, sb);
return 0;
}
logical_sb_block = sb_block;
}
- if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) {
+ bh = ext4_sb_bread_unmovable(sb, logical_sb_block);
+ if (IS_ERR(bh)) {
ext4_msg(sb, KERN_ERR, "unable to read superblock");
+ ret = PTR_ERR(bh);
+ bh = NULL;
goto out_fail;
}
/*
#ifdef CONFIG_EXT4_FS_POSIX_ACL
set_opt(sb, POSIX_ACL);
#endif
+ if (ext4_has_feature_fast_commit(sb))
+ set_opt2(sb, JOURNAL_FAST_COMMIT);
/* don't forget to enable journal_csum when metadata_csum is enabled. */
if (ext4_has_metadata_csum(sb))
set_opt(sb, JOURNAL_CHECKSUM);
brelse(bh);
logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE;
offset = do_div(logical_sb_block, blocksize);
- bh = sb_bread_unmovable(sb, logical_sb_block);
- if (!bh) {
+ bh = ext4_sb_bread_unmovable(sb, logical_sb_block);
+ if (IS_ERR(bh)) {
ext4_msg(sb, KERN_ERR,
"Can't read superblock on 2nd try");
+ ret = PTR_ERR(bh);
+ bh = NULL;
goto failed_mount;
}
es = (struct ext4_super_block *)(bh->b_data + offset);
/* Pre-read the descriptors into the buffer cache */
for (i = 0; i < db_count; i++) {
block = descriptor_loc(sb, logical_sb_block, i);
- sb_breadahead_unmovable(sb, block);
+ ext4_sb_breadahead_unmovable(sb, block);
}
for (i = 0; i < db_count; i++) {
struct buffer_head *bh;
block = descriptor_loc(sb, logical_sb_block, i);
- bh = sb_bread_unmovable(sb, block);
- if (!bh) {
+ bh = ext4_sb_bread_unmovable(sb, block);
+ if (IS_ERR(bh)) {
ext4_msg(sb, KERN_ERR,
"can't read group descriptor %d", i);
db_count = i;
+ ret = PTR_ERR(bh);
+ bh = NULL;
goto failed_mount2;
}
rcu_read_lock();
sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM;
clear_opt(sb, JOURNAL_CHECKSUM);
clear_opt(sb, DATA_FLAGS);
+ clear_opt2(sb, JOURNAL_FAST_COMMIT);
sbi->s_journal = NULL;
needs_recovery = 0;
goto no_journal;
set_task_ioprio(sbi->s_journal->j_task, journal_ioprio);
sbi->s_journal->j_commit_callback = ext4_journal_commit_callback;
+ sbi->s_journal->j_submit_inode_data_buffers =
+ ext4_journal_submit_inode_data_buffers;
+ sbi->s_journal->j_finish_inode_data_buffers =
+ ext4_journal_finish_inode_data_buffers;
no_journal:
if (!test_opt(sb, NO_MBCACHE)) {
journal->j_commit_interval = sbi->s_commit_interval;
journal->j_min_batch_time = sbi->s_min_batch_time;
journal->j_max_batch_time = sbi->s_max_batch_time;
+ ext4_fc_init(sb, journal);
write_lock(&journal->j_state_lock);
if (test_opt(sb, BARRIER))
goto out_bdev;
}
journal->j_private = sb;
- ll_rw_block(REQ_OP_READ, REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer);
- wait_on_buffer(journal->j_sb_buffer);
- if (!buffer_uptodate(journal->j_sb_buffer)) {
+ if (ext4_read_bh_lock(journal->j_sb_buffer, REQ_META | REQ_PRIO, true)) {
ext4_msg(sb, KERN_ERR, "I/O error on journal device");
goto out_journal;
}
/* Quotafile not on the same filesystem? */
if (path->dentry->d_sb != sb)
return -EXDEV;
+
+ /* Quota already enabled for this file? */
+ if (IS_NOQUOTA(d_inode(path->dentry)))
+ return -EBUSY;
+
/* Journaling quota? */
if (EXT4_SB(sb)->s_qf_names[type]) {
/* Quotafile not in fs root? */
projects / linux-2.6-microblaze.git / blobdiff