Move functions for handling orphan inodes into a new file
fs/ext4/orphan.c to have them in one place and somewhat reduce size of
other files. No code changes.
Signed-off-by: Jan Kara <jack@xxxxxxx>
---
fs/ext4/Makefile | 2 +-
fs/ext4/ext4.h | 9 +-
fs/ext4/namei.c | 174 ------------------------------
fs/ext4/orphan.c | 315 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
fs/ext4/super.c | 140 +------------------------
5 files changed, 324 insertions(+), 316 deletions(-)
create mode 100644 fs/ext4/orphan.c
diff --git a/fs/ext4/Makefile b/fs/ext4/Makefile
index 75285ea9aa05..477de2db9d4a 100644
--- a/fs/ext4/Makefile
+++ b/fs/ext4/Makefile
@@ -8,7 +8,7 @@ ext4-y := balloc.o bitmap.o dir.o file.o fsync.o ialloc.o inode.o page-io.o \
ioctl.o namei.o super.o symlink.o hash.o resize.o extents.o \
ext4_jbd2.o migrate.o mballoc.o block_validity.o move_extent.o \
mmp.o indirect.o extents_status.o xattr.o xattr_user.o \
- xattr_trusted.o inline.o readpage.o
+ xattr_trusted.o inline.o readpage.o orphan.o
ext4-$(CONFIG_EXT4_FS_POSIX_ACL) += acl.o
ext4-$(CONFIG_EXT4_FS_SECURITY) += xattr_security.o
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 01916e21b8fa..2a69a5e9017a 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2335,8 +2335,6 @@ extern int ext4_ind_migrate(struct inode *inode);
/* namei.c */
extern int ext4_dirent_csum_verify(struct inode *inode,
struct ext4_dir_entry *dirent);
-extern int ext4_orphan_add(handle_t *, struct inode *);
-extern int ext4_orphan_del(handle_t *, struct inode *);
extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
__u32 start_minor_hash, __u32 *next_hash);
extern int search_dir(struct buffer_head *bh,
@@ -2469,6 +2467,7 @@ extern int ext4_update_rocompat_feature(handle_t *handle,
struct super_block *sb, __u32 rocompat);
extern int ext4_update_incompat_feature(handle_t *handle,
struct super_block *sb, __u32 incompat);
+extern int ext4_feature_set_ok(struct super_block *sb, int readonly);
extern ext4_fsblk_t ext4_block_bitmap(struct super_block *sb,
struct ext4_group_desc *bg);
extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb,
@@ -2968,6 +2967,12 @@ extern int ext4_bio_write_page(struct ext4_io_submit *io,
/* mmp.c */
extern int ext4_multi_mount_protect(struct super_block *, ext4_fsblk_t);
+/* orphan.c */
+extern int ext4_orphan_add(handle_t *, struct inode *);
+extern int ext4_orphan_del(handle_t *, struct inode *);
+extern void ext4_orphan_cleanup(struct super_block *sb,
+ struct ext4_super_block *es);
+
/*
* Add new method to test whether block and inode bitmaps are properly
* initialized. With uninit_bg reading the block from disk is not enough
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 225890c8289e..b38b2d068ef0 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -2829,180 +2829,6 @@ int ext4_empty_dir(struct inode *inode)
return 1;
}
-/*
- * ext4_orphan_add() links an unlinked or truncated inode into a list of
- * such inodes, starting at the superblock, in case we crash before the
- * file is closed/deleted, or in case the inode truncate spans multiple
- * transactions and the last transaction is not recovered after a crash.
- *
- * At filesystem recovery time, we walk this list deleting unlinked
- * inodes and truncating linked inodes in ext4_orphan_cleanup().
- *
- * Orphan list manipulation functions must be called under i_mutex unless
- * we are just creating the inode or deleting it.
- */
-int ext4_orphan_add(handle_t *handle, struct inode *inode)
-{
- struct super_block *sb = inode->i_sb;
- struct ext4_sb_info *sbi = EXT4_SB(sb);
- struct ext4_iloc iloc;
- int err = 0, rc;
- bool dirty = false;
-
- if (!sbi->s_journal || is_bad_inode(inode))
- return 0;
-
- WARN_ON_ONCE(!(inode->i_state & (I_NEW | I_FREEING)) &&
- !mutex_is_locked(&inode->i_mutex));
- /*
- * Exit early if inode already is on orphan list. This is a big speedup
- * since we don't have to contend on the global s_orphan_lock.
- */
- if (!list_empty(&EXT4_I(inode)->i_orphan))
- return 0;
-
- /*
- * Orphan handling is only valid for files with data blocks
- * being truncated, or files being unlinked. Note that we either
- * hold i_mutex, or the inode can not be referenced from outside,
- * so i_nlink should not be bumped due to race
- */
- J_ASSERT((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
- S_ISLNK(inode->i_mode)) || inode->i_nlink == 0);
-
- BUFFER_TRACE(sbi->s_sbh, "get_write_access");
- err = ext4_journal_get_write_access(handle, sb, sbi->s_sbh,
- EXT4_JTR_NONE);
- if (err)
- goto out;
-
- err = ext4_reserve_inode_write(handle, inode, &iloc);
- if (err)
- goto out;
-
- mutex_lock(&sbi->s_orphan_lock);
- /*
- * Due to previous errors inode may be already a part of on-disk
- * orphan list. If so skip on-disk list modification.
- */
- if (!NEXT_ORPHAN(inode) || NEXT_ORPHAN(inode) >
- (le32_to_cpu(sbi->s_es->s_inodes_count))) {
- /* Insert this inode at the head of the on-disk orphan list */
- NEXT_ORPHAN(inode) = le32_to_cpu(sbi->s_es->s_last_orphan);
- sbi->s_es->s_last_orphan = cpu_to_le32(inode->i_ino);
- dirty = true;
- }
- list_add(&EXT4_I(inode)->i_orphan, &sbi->s_orphan);
- mutex_unlock(&sbi->s_orphan_lock);
-
- if (dirty) {
- err = ext4_handle_dirty_super(handle, sb);
- rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
- if (!err)
- err = rc;
- if (err) {
- /*
- * We have to remove inode from in-memory list if
- * addition to on disk orphan list failed. Stray orphan
- * list entries can cause panics at unmount time.
- */
- mutex_lock(&sbi->s_orphan_lock);
- list_del(&EXT4_I(inode)->i_orphan);
- mutex_unlock(&sbi->s_orphan_lock);
- }
- }
- jbd_debug(4, "superblock will point to %lu\n", inode->i_ino);
- jbd_debug(4, "orphan inode %lu will point to %d\n",
- inode->i_ino, NEXT_ORPHAN(inode));
-out:
- ext4_std_error(sb, err);
- return err;
-}
-
-/*
- * ext4_orphan_del() removes an unlinked or truncated inode from the list
- * of such inodes stored on disk, because it is finally being cleaned up.
- */
-int ext4_orphan_del(handle_t *handle, struct inode *inode)
-{
- struct list_head *prev;
- struct ext4_inode_info *ei = EXT4_I(inode);
- struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
- __u32 ino_next;
- struct ext4_iloc iloc;
- int err = 0;
-
- if (!sbi->s_journal && !(sbi->s_mount_state & EXT4_ORPHAN_FS))
- return 0;
-
- WARN_ON_ONCE(!(inode->i_state & (I_NEW | I_FREEING)) &&
- !mutex_is_locked(&inode->i_mutex));
- /* Do this quick check before taking global s_orphan_lock. */
- if (list_empty(&ei->i_orphan))
- return 0;
-
- if (handle) {
- /* Grab inode buffer early before taking global s_orphan_lock */
- err = ext4_reserve_inode_write(handle, inode, &iloc);
- }
-
- mutex_lock(&sbi->s_orphan_lock);
- jbd_debug(4, "remove inode %lu from orphan list\n", inode->i_ino);
-
- prev = ei->i_orphan.prev;
- list_del_init(&ei->i_orphan);
-
- /* If we're on an error path, we may not have a valid
- * transaction handle with which to update the orphan list on
- * disk, but we still need to remove the inode from the linked
- * list in memory. */
- if (!handle || err) {
- mutex_unlock(&sbi->s_orphan_lock);
- goto out_err;
- }
-
- ino_next = NEXT_ORPHAN(inode);
- if (prev == &sbi->s_orphan) {
- jbd_debug(4, "superblock will point to %u\n", ino_next);
- BUFFER_TRACE(sbi->s_sbh, "get_write_access");
- err = ext4_journal_get_write_access(handle, inode->i_sb,
- sbi->s_sbh, EXT4_JTR_NONE);
- if (err) {
- mutex_unlock(&sbi->s_orphan_lock);
- goto out_brelse;
- }
- sbi->s_es->s_last_orphan = cpu_to_le32(ino_next);
- mutex_unlock(&sbi->s_orphan_lock);
- err = ext4_handle_dirty_super(handle, inode->i_sb);
- } else {
- struct ext4_iloc iloc2;
- struct inode *i_prev =
- &list_entry(prev, struct ext4_inode_info, i_orphan)->vfs_inode;
-
- jbd_debug(4, "orphan inode %lu will point to %u\n",
- i_prev->i_ino, ino_next);
- err = ext4_reserve_inode_write(handle, i_prev, &iloc2);
- if (err) {
- mutex_unlock(&sbi->s_orphan_lock);
- goto out_brelse;
- }
- NEXT_ORPHAN(i_prev) = ino_next;
- err = ext4_mark_iloc_dirty(handle, i_prev, &iloc2);
- mutex_unlock(&sbi->s_orphan_lock);
- }
- if (err)
- goto out_brelse;
- NEXT_ORPHAN(inode) = 0;
- err = ext4_mark_iloc_dirty(handle, inode, &iloc);
-out_err:
- ext4_std_error(inode->i_sb, err);
- return err;
-
-out_brelse:
- brelse(iloc.bh);
- goto out_err;
-}
-
static int ext4_rmdir(struct inode *dir, struct dentry *dentry)
{
int retval;
diff --git a/fs/ext4/orphan.c b/fs/ext4/orphan.c
new file mode 100644
index 000000000000..a192cc2086f9
--- /dev/null
+++ b/fs/ext4/orphan.c
@@ -0,0 +1,315 @@
+/*
+ * Ext4 orphan inode handling
+ */
+#include <linux/fs.h>
+#include <linux/quotaops.h>
+#include <linux/buffer_head.h>
+
+#include "ext4.h"
+#include "ext4_jbd2.h"
+
+/*
+ * ext4_orphan_add() links an unlinked or truncated inode into a list of
+ * such inodes, starting at the superblock, in case we crash before the
+ * file is closed/deleted, or in case the inode truncate spans multiple
+ * transactions and the last transaction is not recovered after a crash.
+ *
+ * At filesystem recovery time, we walk this list deleting unlinked
+ * inodes and truncating linked inodes in ext4_orphan_cleanup().
+ *
+ * Orphan list manipulation functions must be called under i_mutex unless
+ * we are just creating the inode or deleting it.
+ */
+int ext4_orphan_add(handle_t *handle, struct inode *inode)
+{
+ struct super_block *sb = inode->i_sb;
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
+ struct ext4_iloc iloc;
+ int err = 0, rc;
+ bool dirty = false;
+
+ if (!sbi->s_journal || is_bad_inode(inode))
+ return 0;
+
+ WARN_ON_ONCE(!(inode->i_state & (I_NEW | I_FREEING)) &&
+ !mutex_is_locked(&inode->i_mutex));
+ /*
+ * Exit early if inode already is on orphan list. This is a big speedup
+ * since we don't have to contend on the global s_orphan_lock.
+ */
+ if (!list_empty(&EXT4_I(inode)->i_orphan))
+ return 0;
+
+ /*
+ * Orphan handling is only valid for files with data blocks
+ * being truncated, or files being unlinked. Note that we either
+ * hold i_mutex, or the inode can not be referenced from outside,
+ * so i_nlink should not be bumped due to race
+ */
+ J_ASSERT((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
+ S_ISLNK(inode->i_mode)) || inode->i_nlink == 0);
+
+ BUFFER_TRACE(sbi->s_sbh, "get_write_access");
+ err = ext4_journal_get_write_access(handle, sb, sbi->s_sbh,
+ EXT4_JTR_NONE);
+ if (err)
+ goto out;
+
+ err = ext4_reserve_inode_write(handle, inode, &iloc);
+ if (err)
+ goto out;
+
+ mutex_lock(&sbi->s_orphan_lock);
+ /*
+ * Due to previous errors inode may be already a part of on-disk
+ * orphan list. If so skip on-disk list modification.
+ */
+ if (!NEXT_ORPHAN(inode) || NEXT_ORPHAN(inode) >
+ (le32_to_cpu(sbi->s_es->s_inodes_count))) {
+ /* Insert this inode at the head of the on-disk orphan list */
+ NEXT_ORPHAN(inode) = le32_to_cpu(sbi->s_es->s_last_orphan);
+ sbi->s_es->s_last_orphan = cpu_to_le32(inode->i_ino);
+ dirty = true;
+ }
+ list_add(&EXT4_I(inode)->i_orphan, &sbi->s_orphan);
+ mutex_unlock(&sbi->s_orphan_lock);
+
+ if (dirty) {
+ err = ext4_handle_dirty_super(handle, sb);
+ rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
+ if (!err)
+ err = rc;
+ if (err) {
+ /*
+ * We have to remove inode from in-memory list if
+ * addition to on disk orphan list failed. Stray orphan
+ * list entries can cause panics at unmount time.
+ */
+ mutex_lock(&sbi->s_orphan_lock);
+ list_del(&EXT4_I(inode)->i_orphan);
+ mutex_unlock(&sbi->s_orphan_lock);
+ }
+ }
+ jbd_debug(4, "superblock will point to %lu\n", inode->i_ino);
+ jbd_debug(4, "orphan inode %lu will point to %d\n",
+ inode->i_ino, NEXT_ORPHAN(inode));
+out:
+ ext4_std_error(sb, err);
+ return err;
+}
+
+/*
+ * ext4_orphan_del() removes an unlinked or truncated inode from the list
+ * of such inodes stored on disk, because it is finally being cleaned up.
+ */
+int ext4_orphan_del(handle_t *handle, struct inode *inode)
+{
+ struct list_head *prev;
+ struct ext4_inode_info *ei = EXT4_I(inode);
+ struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
+ __u32 ino_next;
+ struct ext4_iloc iloc;
+ int err = 0;
+
+ if (!sbi->s_journal && !(sbi->s_mount_state & EXT4_ORPHAN_FS))
+ return 0;
+
+ WARN_ON_ONCE(!(inode->i_state & (I_NEW | I_FREEING)) &&
+ !mutex_is_locked(&inode->i_mutex));
+ /* Do this quick check before taking global s_orphan_lock. */
+ if (list_empty(&ei->i_orphan))
+ return 0;
+
+ if (handle) {
+ /* Grab inode buffer early before taking global s_orphan_lock */
+ err = ext4_reserve_inode_write(handle, inode, &iloc);
+ }
+
+ mutex_lock(&sbi->s_orphan_lock);
+ jbd_debug(4, "remove inode %lu from orphan list\n", inode->i_ino);
+
+ prev = ei->i_orphan.prev;
+ list_del_init(&ei->i_orphan);
+
+ /* If we're on an error path, we may not have a valid
+ * transaction handle with which to update the orphan list on
+ * disk, but we still need to remove the inode from the linked
+ * list in memory. */
+ if (!handle || err) {
+ mutex_unlock(&sbi->s_orphan_lock);
+ goto out_err;
+ }
+
+ ino_next = NEXT_ORPHAN(inode);
+ if (prev == &sbi->s_orphan) {
+ jbd_debug(4, "superblock will point to %u\n", ino_next);
+ BUFFER_TRACE(sbi->s_sbh, "get_write_access");
+ err = ext4_journal_get_write_access(handle, inode->i_sb,
+ sbi->s_sbh, EXT4_JTR_NONE);
+ if (err) {
+ mutex_unlock(&sbi->s_orphan_lock);
+ goto out_brelse;
+ }
+ sbi->s_es->s_last_orphan = cpu_to_le32(ino_next);
+ mutex_unlock(&sbi->s_orphan_lock);
+ err = ext4_handle_dirty_super(handle, inode->i_sb);
+ } else {
+ struct ext4_iloc iloc2;
+ struct inode *i_prev =
+ &list_entry(prev, struct ext4_inode_info, i_orphan)->vfs_inode;
+
+ jbd_debug(4, "orphan inode %lu will point to %u\n",
+ i_prev->i_ino, ino_next);
+ err = ext4_reserve_inode_write(handle, i_prev, &iloc2);
+ if (err) {
+ mutex_unlock(&sbi->s_orphan_lock);
+ goto out_brelse;
+ }
+ NEXT_ORPHAN(i_prev) = ino_next;
+ err = ext4_mark_iloc_dirty(handle, i_prev, &iloc2);
+ mutex_unlock(&sbi->s_orphan_lock);
+ }
+ if (err)
+ goto out_brelse;
+ NEXT_ORPHAN(inode) = 0;
+ err = ext4_mark_iloc_dirty(handle, inode, &iloc);
+out_err:
+ ext4_std_error(inode->i_sb, err);
+ return err;
+
+out_brelse:
+ brelse(iloc.bh);
+ goto out_err;
+}
+
+static int ext4_quota_on_mount(struct super_block *sb, int type)
+{
+ return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type],
+ EXT4_SB(sb)->s_jquota_fmt, type);
+}
+
+/* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at
+ * the superblock) which were deleted from all directories, but held open by
+ * a process at the time of a crash. We walk the list and try to delete these
+ * inodes at recovery time (only with a read-write filesystem).
+ *
+ * In order to keep the orphan inode chain consistent during traversal (in
+ * case of crash during recovery), we link each inode into the superblock
+ * orphan list_head and handle it the same way as an inode deletion during
+ * normal operation (which journals the operations for us).
+ *
+ * We only do an iget() and an iput() on each inode, which is very safe if we
+ * accidentally point at an in-use or already deleted inode. The worst that
+ * can happen in this case is that we get a "bit already cleared" message from
+ * ext4_free_inode(). The only reason we would point at a wrong inode is if
+ * e2fsck was run on this filesystem, and it must have already done the orphan
+ * inode cleanup for us, so we can safely abort without any further action.
+ */
+void ext4_orphan_cleanup(struct super_block *sb,
+ struct ext4_super_block *es)
+{
+ unsigned int s_flags = sb->s_flags;
+ int nr_orphans = 0, nr_truncates = 0;
+#ifdef CONFIG_QUOTA
+ int i;
+#endif
+ if (!es->s_last_orphan) {
+ jbd_debug(4, "no orphan inodes to clean up\n");
+ return;
+ }
+
+ if (bdev_read_only(sb->s_bdev)) {
+ ext4_msg(sb, KERN_ERR, "write access "
+ "unavailable, skipping orphan cleanup");
+ return;
+ }
+
+ /* Check if feature set would not allow a r/w mount */
+ if (!ext4_feature_set_ok(sb, 0)) {
+ ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to "
+ "unknown ROCOMPAT features");
+ return;
+ }
+
+ if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) {
+ /* don't clear list on RO mount w/ errors */
+ if (es->s_last_orphan && !(s_flags & MS_RDONLY)) {
+ ext4_msg(sb, KERN_INFO, "Errors on filesystem, "
+ "clearing orphan list.\n");
+ es->s_last_orphan = 0;
+ }
+ jbd_debug(1, "Skipping orphan recovery on fs with errors.\n");
+ return;
+ }
+
+ if (s_flags & MS_RDONLY) {
+ ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs");
+ sb->s_flags &= ~MS_RDONLY;
+ }
+#ifdef CONFIG_QUOTA
+ /* Needed for iput() to work correctly and not trash data */
+ sb->s_flags |= MS_ACTIVE;
+ /* Turn on quotas so that they are updated correctly */
+ for (i = 0; i < EXT4_MAXQUOTAS; i++) {
+ if (EXT4_SB(sb)->s_qf_names[i]) {
+ int ret = ext4_quota_on_mount(sb, i);
+ if (ret < 0)
+ ext4_msg(sb, KERN_ERR,
+ "Cannot turn on journaled "
+ "quota: error %d", ret);
+ }
+ }
+#endif
+
+ while (es->s_last_orphan) {
+ struct inode *inode;
+
+ inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan));
+ if (IS_ERR(inode)) {
+ es->s_last_orphan = 0;
+ break;
+ }
+
+ list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan);
+ dquot_initialize(inode);
+ if (inode->i_nlink) {
+ if (test_opt(sb, DEBUG))
+ ext4_msg(sb, KERN_DEBUG,
+ "%s: truncating inode %lu to %lld bytes",
+ __func__, inode->i_ino, inode->i_size);
+ jbd_debug(2, "truncating inode %lu to %lld bytes\n",
+ inode->i_ino, inode->i_size);
+ mutex_lock(&inode->i_mutex);
+ truncate_inode_pages(inode->i_mapping, inode->i_size);
+ ext4_truncate(inode);
+ mutex_unlock(&inode->i_mutex);
+ nr_truncates++;
+ } else {
+ if (test_opt(sb, DEBUG))
+ ext4_msg(sb, KERN_DEBUG,
+ "%s: deleting unreferenced inode %lu",
+ __func__, inode->i_ino);
+ jbd_debug(2, "deleting unreferenced inode %lu\n",
+ inode->i_ino);
+ nr_orphans++;
+ }
+ iput(inode); /* The delete magic happens here! */
+ }
+
+#define PLURAL(x) (x), ((x) == 1) ? "" : "s"
+
+ if (nr_orphans)
+ ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted",
+ PLURAL(nr_orphans));
+ if (nr_truncates)
+ ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up",
+ PLURAL(nr_truncates));
+#ifdef CONFIG_QUOTA
+ /* Turn quotas off */
+ for (i = 0; i < EXT4_MAXQUOTAS; i++) {
+ if (sb_dqopt(sb)->files[i])
+ dquot_quota_off(sb, i);
+ }
+#endif
+ sb->s_flags = s_flags; /* Restore MS_RDONLY status */
+}
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 0f577e45de5d..a8ea6e00b23f 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -77,7 +77,6 @@ static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags,
const char *dev_name, void *data);
static inline int ext2_feature_set_ok(struct super_block *sb);
static inline int ext3_feature_set_ok(struct super_block *sb);
-static int ext4_feature_set_ok(struct super_block *sb, int readonly);
static void ext4_destroy_lazyinit_thread(void);
static void ext4_unregister_li_request(struct super_block *sb);
static void ext4_clear_request_list(void);
@@ -1035,7 +1034,6 @@ static int ext4_write_info(struct super_block *sb, int type);
static int ext4_quota_on(struct super_block *sb, int type, int format_id,
struct path *path);
static int ext4_quota_off(struct super_block *sb, int type);
-static int ext4_quota_on_mount(struct super_block *sb, int type);
static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data,
size_t len, loff_t off);
static ssize_t ext4_quota_write(struct super_block *sb, int type,
@@ -2127,132 +2125,6 @@ static int ext4_check_descriptors(struct super_block *sb,
return 1;
}
-/* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at
- * the superblock) which were deleted from all directories, but held open by
- * a process at the time of a crash. We walk the list and try to delete these
- * inodes at recovery time (only with a read-write filesystem).
- *
- * In order to keep the orphan inode chain consistent during traversal (in
- * case of crash during recovery), we link each inode into the superblock
- * orphan list_head and handle it the same way as an inode deletion during
- * normal operation (which journals the operations for us).
- *
- * We only do an iget() and an iput() on each inode, which is very safe if we
- * accidentally point at an in-use or already deleted inode. The worst that
- * can happen in this case is that we get a "bit already cleared" message from
- * ext4_free_inode(). The only reason we would point at a wrong inode is if
- * e2fsck was run on this filesystem, and it must have already done the orphan
- * inode cleanup for us, so we can safely abort without any further action.
- */
-static void ext4_orphan_cleanup(struct super_block *sb,
- struct ext4_super_block *es)
-{
- unsigned int s_flags = sb->s_flags;
- int nr_orphans = 0, nr_truncates = 0;
-#ifdef CONFIG_QUOTA
- int i;
-#endif
- if (!es->s_last_orphan) {
- jbd_debug(4, "no orphan inodes to clean up\n");
- return;
- }
-
- if (bdev_read_only(sb->s_bdev)) {
- ext4_msg(sb, KERN_ERR, "write access "
- "unavailable, skipping orphan cleanup");
- return;
- }
-
- /* Check if feature set would not allow a r/w mount */
- if (!ext4_feature_set_ok(sb, 0)) {
- ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to "
- "unknown ROCOMPAT features");
- return;
- }
-
- if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) {
- /* don't clear list on RO mount w/ errors */
- if (es->s_last_orphan && !(s_flags & MS_RDONLY)) {
- ext4_msg(sb, KERN_INFO, "Errors on filesystem, "
- "clearing orphan list.\n");
- es->s_last_orphan = 0;
- }
- jbd_debug(1, "Skipping orphan recovery on fs with errors.\n");
- return;
- }
-
- if (s_flags & MS_RDONLY) {
- ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs");
- sb->s_flags &= ~MS_RDONLY;
- }
-#ifdef CONFIG_QUOTA
- /* Needed for iput() to work correctly and not trash data */
- sb->s_flags |= MS_ACTIVE;
- /* Turn on quotas so that they are updated correctly */
- for (i = 0; i < EXT4_MAXQUOTAS; i++) {
- if (EXT4_SB(sb)->s_qf_names[i]) {
- int ret = ext4_quota_on_mount(sb, i);
- if (ret < 0)
- ext4_msg(sb, KERN_ERR,
- "Cannot turn on journaled "
- "quota: error %d", ret);
- }
- }
-#endif
-
- while (es->s_last_orphan) {
- struct inode *inode;
-
- inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan));
- if (IS_ERR(inode)) {
- es->s_last_orphan = 0;
- break;
- }
-
- list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan);
- dquot_initialize(inode);
- if (inode->i_nlink) {
- if (test_opt(sb, DEBUG))
- ext4_msg(sb, KERN_DEBUG,
- "%s: truncating inode %lu to %lld bytes",
- __func__, inode->i_ino, inode->i_size);
- jbd_debug(2, "truncating inode %lu to %lld bytes\n",
- inode->i_ino, inode->i_size);
- mutex_lock(&inode->i_mutex);
- truncate_inode_pages(inode->i_mapping, inode->i_size);
- ext4_truncate(inode);
- mutex_unlock(&inode->i_mutex);
- nr_truncates++;
- } else {
- if (test_opt(sb, DEBUG))
- ext4_msg(sb, KERN_DEBUG,
- "%s: deleting unreferenced inode %lu",
- __func__, inode->i_ino);
- jbd_debug(2, "deleting unreferenced inode %lu\n",
- inode->i_ino);
- nr_orphans++;
- }
- iput(inode); /* The delete magic happens here! */
- }
-
-#define PLURAL(x) (x), ((x) == 1) ? "" : "s"
-
- if (nr_orphans)
- ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted",
- PLURAL(nr_orphans));
- if (nr_truncates)
- ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up",
- PLURAL(nr_truncates));
-#ifdef CONFIG_QUOTA
- /* Turn quotas off */
- for (i = 0; i < EXT4_MAXQUOTAS; i++) {
- if (sb_dqopt(sb)->files[i])
- dquot_quota_off(sb, i);
- }
-#endif
- sb->s_flags = s_flags; /* Restore MS_RDONLY status */
-}
-
/*
* Maximal extent format file size.
* Resulting logical blkno at s_maxbytes must fit in our on-disk
@@ -2766,7 +2638,7 @@ static struct kobj_type ext4_feat_ktype = {
* Returns 1 if this filesystem can be mounted as requested,
* 0 if it cannot be.
*/
-static int ext4_feature_set_ok(struct super_block *sb, int readonly)
+int ext4_feature_set_ok(struct super_block *sb, int readonly)
{
if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) {
ext4_msg(sb, KERN_ERR,
@@ -5244,16 +5116,6 @@ static int ext4_write_info(struct super_block *sb, int type)
}
/*
- * Turn on quotas during mount time - we need to find
- * the quota file and such...
- */
-static int ext4_quota_on_mount(struct super_block *sb, int type)
-{
- return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type],
- EXT4_SB(sb)->s_jquota_fmt, type);
-}
-
-/*
* Standard function to be called on quota_on
*/
static int ext4_quota_on(struct super_block *sb, int type, int format_id,
--
2.1.4
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
