forked from Minki/linux
Pull request from git://github.com/prasad-joshi/logfs_upstream.git
There are few important bug fixes for LogFS
Shortlog:
Joern Engel (5):
logfs: Prevent memory corruption
logfs: remove useless BUG_ON
logfs: Free areas before calling generic_shutdown_super()
logfs: Grow inode in delete path
Logfs: Allow NULL block_isbad() methods
Prasad Joshi (5):
logfs: update page reference count for pined pages
logfs: take write mutex lock during fsync and sync
logfs: set superblock shutdown flag after generic sb shutdown
logfs: Propagate page parameter to __logfs_write_inode
MAINTAINERS: Add Prasad Joshi in LogFS maintiners
Diffstat:
MAINTAINERS | 1 +
fs/logfs/dev_mtd.c | 26 +++++++++++-------------
fs/logfs/dir.c | 2 +-
fs/logfs/file.c | 2 +
fs/logfs/gc.c | 2 +-
fs/logfs/inode.c | 4 ++-
fs/logfs/journal.c | 1 -
fs/logfs/logfs.h | 5 +++-
fs/logfs/readwrite.c | 51 +++++++++++++++++++++++++++++++++----------------
fs/logfs/segment.c | 51 ++++++++++++++++++++++++++++++++++++++-----------
fs/logfs/super.c | 3 +-
11 files changed, 99 insertions(+), 49 deletions(-)
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Merge tag 'for-linus' of git://github.com/prasad-joshi/logfs_upstream
There are few important bug fixes for LogFS
* tag 'for-linus' of git://github.com/prasad-joshi/logfs_upstream:
Logfs: Allow NULL block_isbad() methods
logfs: Grow inode in delete path
logfs: Free areas before calling generic_shutdown_super()
logfs: remove useless BUG_ON
MAINTAINERS: Add Prasad Joshi in LogFS maintiners
logfs: Propagate page parameter to __logfs_write_inode
logfs: set superblock shutdown flag after generic sb shutdown
logfs: take write mutex lock during fsync and sync
logfs: Prevent memory corruption
logfs: update page reference count for pined pages
Fix up conflict in fs/logfs/dev_mtd.c due to semantic change in what
"mtd->block_isbad" means in commit f2933e86ad: "Logfs: Allow NULL
block_isbad() methods" clashing with the abstraction changes in the
commits 7086c19d07: "mtd: introduce mtd_block_isbad interface" and
d58b27ed58: "logfs: do not use 'mtd->block_isbad' directly".
This resolution takes the semantics from commit f2933e86ad, and just
makes mtd_block_isbad() return zero (false) if the 'block_isbad'
function is NULL. But that also means that now "mtd_can_have_bb()"
always returns 0.
Now, "mtd_block_markbad()" will obviously return an error if the
low-level driver doesn't support bad blocks, so this is somewhat
non-symmetric, but it actually makes sense if a NULL "block_isbad"
function is considered to mean "I assume that all my blocks are always
good".
This commit is contained in:
Linus Torvalds
commit
d3712b9dfc
@ -4140,6 +4140,7 @@ F: fs/partitions/ldm.*
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LogFS
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M: Joern Engel <joern@logfs.org>
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M: Prasad Joshi <prasadjoshi.linux@gmail.com>
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L: logfs@logfs.org
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W: logfs.org
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S: Maintained
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@ -71,7 +71,7 @@ static int write_dir(struct inode *dir, struct logfs_disk_dentry *dd,
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static int write_inode(struct inode *inode)
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{
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return __logfs_write_inode(inode, WF_LOCK);
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return __logfs_write_inode(inode, NULL, WF_LOCK);
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}
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static s64 dir_seek_data(struct inode *inode, s64 pos)
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@ -230,7 +230,9 @@ int logfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
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return ret;
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mutex_lock(&inode->i_mutex);
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logfs_get_wblocks(sb, NULL, WF_LOCK);
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logfs_write_anchor(sb);
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logfs_put_wblocks(sb, NULL, WF_LOCK);
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mutex_unlock(&inode->i_mutex);
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return 0;
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@ -367,7 +367,7 @@ static struct gc_candidate *get_candidate(struct super_block *sb)
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int i, max_dist;
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struct gc_candidate *cand = NULL, *this;
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max_dist = min(no_free_segments(sb), LOGFS_NO_AREAS);
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max_dist = min(no_free_segments(sb), LOGFS_NO_AREAS - 1);
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for (i = max_dist; i >= 0; i--) {
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this = first_in_list(&super->s_low_list[i]);
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@ -286,7 +286,7 @@ static int logfs_write_inode(struct inode *inode, struct writeback_control *wbc)
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if (logfs_inode(inode)->li_flags & LOGFS_IF_STILLBORN)
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return 0;
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ret = __logfs_write_inode(inode, flags);
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ret = __logfs_write_inode(inode, NULL, flags);
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LOGFS_BUG_ON(ret, inode->i_sb);
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return ret;
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}
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@ -363,7 +363,9 @@ static void logfs_init_once(void *_li)
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static int logfs_sync_fs(struct super_block *sb, int wait)
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{
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logfs_get_wblocks(sb, NULL, WF_LOCK);
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logfs_write_anchor(sb);
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logfs_put_wblocks(sb, NULL, WF_LOCK);
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return 0;
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}
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@ -612,7 +612,6 @@ static size_t __logfs_write_je(struct super_block *sb, void *buf, u16 type,
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if (len == 0)
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return logfs_write_header(super, header, 0, type);
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BUG_ON(len > sb->s_blocksize);
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compr_len = logfs_compress(buf, data, len, sb->s_blocksize);
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if (compr_len < 0 || type == JE_ANCHOR) {
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memcpy(data, buf, len);
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@ -528,7 +528,7 @@ void logfs_destroy_inode_cache(void);
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void logfs_set_blocks(struct inode *inode, u64 no);
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/* these logically belong into inode.c but actually reside in readwrite.c */
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int logfs_read_inode(struct inode *inode);
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int __logfs_write_inode(struct inode *inode, long flags);
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int __logfs_write_inode(struct inode *inode, struct page *, long flags);
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void logfs_evict_inode(struct inode *inode);
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/* journal.c */
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@ -577,6 +577,8 @@ void initialize_block_counters(struct page *page, struct logfs_block *block,
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__be64 *array, int page_is_empty);
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int logfs_exist_block(struct inode *inode, u64 bix);
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int get_page_reserve(struct inode *inode, struct page *page);
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void logfs_get_wblocks(struct super_block *sb, struct page *page, int lock);
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void logfs_put_wblocks(struct super_block *sb, struct page *page, int lock);
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extern struct logfs_block_ops indirect_block_ops;
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/* segment.c */
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@ -594,6 +596,7 @@ int logfs_init_mapping(struct super_block *sb);
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void logfs_sync_area(struct logfs_area *area);
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void logfs_sync_segments(struct super_block *sb);
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void freeseg(struct super_block *sb, u32 segno);
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void free_areas(struct super_block *sb);
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/* area handling */
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int logfs_init_areas(struct super_block *sb);
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@ -244,8 +244,7 @@ static void preunlock_page(struct super_block *sb, struct page *page, int lock)
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* is waiting for s_write_mutex. We annotate this fact by setting PG_pre_locked
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* in addition to PG_locked.
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*/
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static void logfs_get_wblocks(struct super_block *sb, struct page *page,
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int lock)
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void logfs_get_wblocks(struct super_block *sb, struct page *page, int lock)
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{
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struct logfs_super *super = logfs_super(sb);
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@ -260,8 +259,7 @@ static void logfs_get_wblocks(struct super_block *sb, struct page *page,
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}
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}
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static void logfs_put_wblocks(struct super_block *sb, struct page *page,
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int lock)
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void logfs_put_wblocks(struct super_block *sb, struct page *page, int lock)
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{
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struct logfs_super *super = logfs_super(sb);
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@ -424,7 +422,7 @@ static void inode_write_block(struct logfs_block *block)
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if (inode->i_ino == LOGFS_INO_MASTER)
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logfs_write_anchor(inode->i_sb);
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else {
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ret = __logfs_write_inode(inode, 0);
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ret = __logfs_write_inode(inode, NULL, 0);
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/* see indirect_write_block comment */
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BUG_ON(ret);
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}
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@ -560,8 +558,13 @@ static void inode_free_block(struct super_block *sb, struct logfs_block *block)
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static void indirect_free_block(struct super_block *sb,
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struct logfs_block *block)
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{
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ClearPagePrivate(block->page);
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block->page->private = 0;
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struct page *page = block->page;
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if (PagePrivate(page)) {
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ClearPagePrivate(page);
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page_cache_release(page);
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set_page_private(page, 0);
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}
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__free_block(sb, block);
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}
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@ -650,8 +653,11 @@ static void alloc_data_block(struct inode *inode, struct page *page)
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logfs_unpack_index(page->index, &bix, &level);
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block = __alloc_block(inode->i_sb, inode->i_ino, bix, level);
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block->page = page;
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SetPagePrivate(page);
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page->private = (unsigned long)block;
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page_cache_get(page);
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set_page_private(page, (unsigned long) block);
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block->ops = &indirect_block_ops;
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}
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@ -1570,11 +1576,15 @@ int logfs_write_buf(struct inode *inode, struct page *page, long flags)
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static int __logfs_delete(struct inode *inode, struct page *page)
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{
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long flags = WF_DELETE;
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int err;
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inode->i_ctime = inode->i_mtime = CURRENT_TIME;
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if (page->index < I0_BLOCKS)
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return logfs_write_direct(inode, page, flags);
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err = grow_inode(inode, page->index, 0);
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if (err)
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return err;
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return logfs_write_rec(inode, page, page->index, 0, flags);
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}
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@ -1623,7 +1633,7 @@ int logfs_rewrite_block(struct inode *inode, u64 bix, u64 ofs,
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if (inode->i_ino == LOGFS_INO_MASTER)
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logfs_write_anchor(inode->i_sb);
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else {
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err = __logfs_write_inode(inode, flags);
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err = __logfs_write_inode(inode, page, flags);
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}
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}
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}
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@ -1873,7 +1883,7 @@ int logfs_truncate(struct inode *inode, u64 target)
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logfs_get_wblocks(sb, NULL, 1);
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err = __logfs_truncate(inode, size);
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if (!err)
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err = __logfs_write_inode(inode, 0);
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err = __logfs_write_inode(inode, NULL, 0);
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logfs_put_wblocks(sb, NULL, 1);
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}
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@ -1901,8 +1911,11 @@ static void move_page_to_inode(struct inode *inode, struct page *page)
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li->li_block = block;
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block->page = NULL;
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page->private = 0;
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ClearPagePrivate(page);
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if (PagePrivate(page)) {
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ClearPagePrivate(page);
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page_cache_release(page);
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set_page_private(page, 0);
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}
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}
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static void move_inode_to_page(struct page *page, struct inode *inode)
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@ -1918,8 +1931,12 @@ static void move_inode_to_page(struct page *page, struct inode *inode)
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BUG_ON(PagePrivate(page));
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block->ops = &indirect_block_ops;
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block->page = page;
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page->private = (unsigned long)block;
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SetPagePrivate(page);
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if (!PagePrivate(page)) {
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SetPagePrivate(page);
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page_cache_get(page);
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set_page_private(page, (unsigned long) block);
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}
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block->inode = NULL;
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li->li_block = NULL;
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@ -2106,14 +2123,14 @@ void logfs_set_segment_unreserved(struct super_block *sb, u32 segno, u32 ec)
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ec_level);
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}
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int __logfs_write_inode(struct inode *inode, long flags)
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int __logfs_write_inode(struct inode *inode, struct page *page, long flags)
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{
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struct super_block *sb = inode->i_sb;
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int ret;
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logfs_get_wblocks(sb, NULL, flags & WF_LOCK);
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logfs_get_wblocks(sb, page, flags & WF_LOCK);
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ret = do_write_inode(inode);
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logfs_put_wblocks(sb, NULL, flags & WF_LOCK);
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logfs_put_wblocks(sb, page, flags & WF_LOCK);
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return ret;
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}
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@ -86,7 +86,11 @@ int __logfs_buf_write(struct logfs_area *area, u64 ofs, void *buf, size_t len,
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BUG_ON(!page); /* FIXME: reserve a pool */
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SetPageUptodate(page);
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memcpy(page_address(page) + offset, buf, copylen);
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SetPagePrivate(page);
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if (!PagePrivate(page)) {
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SetPagePrivate(page);
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page_cache_get(page);
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}
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page_cache_release(page);
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buf += copylen;
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@ -110,7 +114,10 @@ static void pad_partial_page(struct logfs_area *area)
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page = get_mapping_page(sb, index, 0);
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BUG_ON(!page); /* FIXME: reserve a pool */
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memset(page_address(page) + offset, 0xff, len);
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SetPagePrivate(page);
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if (!PagePrivate(page)) {
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SetPagePrivate(page);
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page_cache_get(page);
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}
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page_cache_release(page);
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}
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}
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@ -130,7 +137,10 @@ static void pad_full_pages(struct logfs_area *area)
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BUG_ON(!page); /* FIXME: reserve a pool */
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SetPageUptodate(page);
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memset(page_address(page), 0xff, PAGE_CACHE_SIZE);
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SetPagePrivate(page);
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if (!PagePrivate(page)) {
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SetPagePrivate(page);
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page_cache_get(page);
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}
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page_cache_release(page);
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index++;
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no_indizes--;
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@ -485,8 +495,12 @@ static void move_btree_to_page(struct inode *inode, struct page *page,
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mempool_free(item, super->s_alias_pool);
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}
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block->page = page;
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SetPagePrivate(page);
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page->private = (unsigned long)block;
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if (!PagePrivate(page)) {
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SetPagePrivate(page);
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page_cache_get(page);
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set_page_private(page, (unsigned long) block);
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}
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block->ops = &indirect_block_ops;
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initialize_block_counters(page, block, data, 0);
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}
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@ -536,8 +550,12 @@ void move_page_to_btree(struct page *page)
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list_add(&item->list, &block->item_list);
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}
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block->page = NULL;
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ClearPagePrivate(page);
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page->private = 0;
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if (PagePrivate(page)) {
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ClearPagePrivate(page);
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page_cache_release(page);
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set_page_private(page, 0);
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}
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block->ops = &btree_block_ops;
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err = alias_tree_insert(block->sb, block->ino, block->bix, block->level,
|
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block);
|
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@ -702,7 +720,10 @@ void freeseg(struct super_block *sb, u32 segno)
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page = find_get_page(mapping, ofs >> PAGE_SHIFT);
|
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if (!page)
|
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continue;
|
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ClearPagePrivate(page);
|
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if (PagePrivate(page)) {
|
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ClearPagePrivate(page);
|
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page_cache_release(page);
|
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}
|
||||
page_cache_release(page);
|
||||
}
|
||||
}
|
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@ -841,6 +862,16 @@ static void free_area(struct logfs_area *area)
|
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kfree(area);
|
||||
}
|
||||
|
||||
void free_areas(struct super_block *sb)
|
||||
{
|
||||
struct logfs_super *super = logfs_super(sb);
|
||||
int i;
|
||||
|
||||
for_each_area(i)
|
||||
free_area(super->s_area[i]);
|
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free_area(super->s_journal_area);
|
||||
}
|
||||
|
||||
static struct logfs_area *alloc_area(struct super_block *sb)
|
||||
{
|
||||
struct logfs_area *area;
|
||||
@ -923,10 +954,6 @@ err:
|
||||
void logfs_cleanup_areas(struct super_block *sb)
|
||||
{
|
||||
struct logfs_super *super = logfs_super(sb);
|
||||
int i;
|
||||
|
||||
btree_grim_visitor128(&super->s_object_alias_tree, 0, kill_alias);
|
||||
for_each_area(i)
|
||||
free_area(super->s_area[i]);
|
||||
free_area(super->s_journal_area);
|
||||
}
|
||||
|
||||
@ -486,14 +486,15 @@ static void logfs_kill_sb(struct super_block *sb)
|
||||
/* Alias entries slow down mount, so evict as many as possible */
|
||||
sync_filesystem(sb);
|
||||
logfs_write_anchor(sb);
|
||||
free_areas(sb);
|
||||
|
||||
/*
|
||||
* From this point on alias entries are simply dropped - and any
|
||||
* writes to the object store are considered bugs.
|
||||
*/
|
||||
super->s_flags |= LOGFS_SB_FLAG_SHUTDOWN;
|
||||
log_super("LogFS: Now in shutdown\n");
|
||||
generic_shutdown_super(sb);
|
||||
super->s_flags |= LOGFS_SB_FLAG_SHUTDOWN;
|
||||
|
||||
BUG_ON(super->s_dirty_used_bytes || super->s_dirty_free_bytes);
|
||||
|
||||
|
||||
@ -441,7 +441,7 @@ static inline void mtd_resume(struct mtd_info *mtd)
|
||||
static inline int mtd_block_isbad(struct mtd_info *mtd, loff_t ofs)
|
||||
{
|
||||
if (!mtd->block_isbad)
|
||||
return -EOPNOTSUPP;
|
||||
return 0;
|
||||
return mtd->block_isbad(mtd, ofs);
|
||||
}
|
||||
|
||||
@ -489,7 +489,7 @@ static inline int mtd_has_oob(const struct mtd_info *mtd)
|
||||
|
||||
static inline int mtd_can_have_bb(const struct mtd_info *mtd)
|
||||
{
|
||||
return !!mtd->block_isbad;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Kernel-side ioctl definitions */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user