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-rw-r--r--fs/logfs/Kconfig4
-rw-r--r--fs/logfs/compr.c2
-rw-r--r--fs/logfs/dev_bdev.c83
-rw-r--r--fs/logfs/dev_mtd.c80
-rw-r--r--fs/logfs/dir.c104
-rw-r--r--fs/logfs/file.c28
-rw-r--r--fs/logfs/gc.c2
-rw-r--r--fs/logfs/inode.c48
-rw-r--r--fs/logfs/journal.c5
-rw-r--r--fs/logfs/logfs.h10
-rw-r--r--fs/logfs/readwrite.c121
-rw-r--r--fs/logfs/segment.c63
-rw-r--r--fs/logfs/super.c50
13 files changed, 311 insertions, 289 deletions
diff --git a/fs/logfs/Kconfig b/fs/logfs/Kconfig
index daf9a9b32dd..09ed066c022 100644
--- a/fs/logfs/Kconfig
+++ b/fs/logfs/Kconfig
@@ -1,6 +1,6 @@
config LOGFS
- tristate "LogFS file system (EXPERIMENTAL)"
- depends on (MTD || BLOCK) && EXPERIMENTAL
+ tristate "LogFS file system"
+ depends on (MTD || BLOCK)
select ZLIB_INFLATE
select ZLIB_DEFLATE
select CRC32
diff --git a/fs/logfs/compr.c b/fs/logfs/compr.c
index 44bbfd249ab..961f02b86d9 100644
--- a/fs/logfs/compr.c
+++ b/fs/logfs/compr.c
@@ -81,7 +81,7 @@ error:
int __init logfs_compr_init(void)
{
- size_t size = max(zlib_deflate_workspacesize(),
+ size_t size = max(zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL),
zlib_inflate_workspacesize());
stream.workspace = vmalloc(size);
if (!stream.workspace)
diff --git a/fs/logfs/dev_bdev.c b/fs/logfs/dev_bdev.c
index 92ca6fbe09b..76279e11982 100644
--- a/fs/logfs/dev_bdev.c
+++ b/fs/logfs/dev_bdev.c
@@ -10,38 +10,27 @@
#include <linux/blkdev.h>
#include <linux/buffer_head.h>
#include <linux/gfp.h>
+#include <linux/prefetch.h>
#define PAGE_OFS(ofs) ((ofs) & (PAGE_SIZE-1))
-static void request_complete(struct bio *bio, int err)
-{
- complete((struct completion *)bio->bi_private);
-}
-
static int sync_request(struct page *page, struct block_device *bdev, int rw)
{
struct bio bio;
struct bio_vec bio_vec;
- struct completion complete;
bio_init(&bio);
+ bio.bi_max_vecs = 1;
bio.bi_io_vec = &bio_vec;
bio_vec.bv_page = page;
bio_vec.bv_len = PAGE_SIZE;
bio_vec.bv_offset = 0;
bio.bi_vcnt = 1;
- bio.bi_idx = 0;
- bio.bi_size = PAGE_SIZE;
bio.bi_bdev = bdev;
- bio.bi_sector = page->index * (PAGE_SIZE >> 9);
- init_completion(&complete);
- bio.bi_private = &complete;
- bio.bi_end_io = request_complete;
-
- submit_bio(rw, &bio);
- generic_unplug_device(bdev_get_queue(bdev));
- wait_for_completion(&complete);
- return test_bit(BIO_UPTODATE, &bio.bi_flags) ? 0 : -EIO;
+ bio.bi_iter.bi_sector = page->index * (PAGE_SIZE >> 9);
+ bio.bi_iter.bi_size = PAGE_SIZE;
+
+ return submit_bio_wait(rw, &bio);
}
static int bdev_readpage(void *_sb, struct page *page)
@@ -67,22 +56,18 @@ static DECLARE_WAIT_QUEUE_HEAD(wq);
static void writeseg_end_io(struct bio *bio, int err)
{
const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
- struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1;
+ struct bio_vec *bvec;
+ int i;
struct super_block *sb = bio->bi_private;
struct logfs_super *super = logfs_super(sb);
- struct page *page;
BUG_ON(!uptodate); /* FIXME: Retry io or write elsewhere */
BUG_ON(err);
- BUG_ON(bio->bi_vcnt == 0);
- do {
- page = bvec->bv_page;
- if (--bvec >= bio->bi_io_vec)
- prefetchw(&bvec->bv_page->flags);
-
- end_page_writeback(page);
- page_cache_release(page);
- } while (bvec >= bio->bi_io_vec);
+
+ bio_for_each_segment_all(bvec, bio, i) {
+ end_page_writeback(bvec->bv_page);
+ page_cache_release(bvec->bv_page);
+ }
bio_put(bio);
if (atomic_dec_and_test(&super->s_pending_writes))
wake_up(&wq);
@@ -95,12 +80,11 @@ static int __bdev_writeseg(struct super_block *sb, u64 ofs, pgoff_t index,
struct address_space *mapping = super->s_mapping_inode->i_mapping;
struct bio *bio;
struct page *page;
- struct request_queue *q = bdev_get_queue(sb->s_bdev);
- unsigned int max_pages = queue_max_hw_sectors(q) >> (PAGE_SHIFT - 9);
+ unsigned int max_pages;
int i;
- if (max_pages > BIO_MAX_PAGES)
- max_pages = BIO_MAX_PAGES;
+ max_pages = min(nr_pages, (size_t) bio_get_nr_vecs(super->s_bdev));
+
bio = bio_alloc(GFP_NOFS, max_pages);
BUG_ON(!bio);
@@ -108,10 +92,9 @@ static int __bdev_writeseg(struct super_block *sb, u64 ofs, pgoff_t index,
if (i >= max_pages) {
/* Block layer cannot split bios :( */
bio->bi_vcnt = i;
- bio->bi_idx = 0;
- bio->bi_size = i * PAGE_SIZE;
+ bio->bi_iter.bi_size = i * PAGE_SIZE;
bio->bi_bdev = super->s_bdev;
- bio->bi_sector = ofs >> 9;
+ bio->bi_iter.bi_sector = ofs >> 9;
bio->bi_private = sb;
bio->bi_end_io = writeseg_end_io;
atomic_inc(&super->s_pending_writes);
@@ -136,10 +119,9 @@ static int __bdev_writeseg(struct super_block *sb, u64 ofs, pgoff_t index,
unlock_page(page);
}
bio->bi_vcnt = nr_pages;
- bio->bi_idx = 0;
- bio->bi_size = nr_pages * PAGE_SIZE;
+ bio->bi_iter.bi_size = nr_pages * PAGE_SIZE;
bio->bi_bdev = super->s_bdev;
- bio->bi_sector = ofs >> 9;
+ bio->bi_iter.bi_sector = ofs >> 9;
bio->bi_private = sb;
bio->bi_end_io = writeseg_end_io;
atomic_inc(&super->s_pending_writes);
@@ -168,7 +150,6 @@ static void bdev_writeseg(struct super_block *sb, u64 ofs, size_t len)
}
len = PAGE_ALIGN(len);
__bdev_writeseg(sb, ofs, ofs >> PAGE_SHIFT, len >> PAGE_SHIFT);
- generic_unplug_device(bdev_get_queue(logfs_super(sb)->s_bdev));
}
@@ -191,12 +172,11 @@ static int do_erase(struct super_block *sb, u64 ofs, pgoff_t index,
{
struct logfs_super *super = logfs_super(sb);
struct bio *bio;
- struct request_queue *q = bdev_get_queue(sb->s_bdev);
- unsigned int max_pages = queue_max_hw_sectors(q) >> (PAGE_SHIFT - 9);
+ unsigned int max_pages;
int i;
- if (max_pages > BIO_MAX_PAGES)
- max_pages = BIO_MAX_PAGES;
+ max_pages = min(nr_pages, (size_t) bio_get_nr_vecs(super->s_bdev));
+
bio = bio_alloc(GFP_NOFS, max_pages);
BUG_ON(!bio);
@@ -204,10 +184,9 @@ static int do_erase(struct super_block *sb, u64 ofs, pgoff_t index,
if (i >= max_pages) {
/* Block layer cannot split bios :( */
bio->bi_vcnt = i;
- bio->bi_idx = 0;
- bio->bi_size = i * PAGE_SIZE;
+ bio->bi_iter.bi_size = i * PAGE_SIZE;
bio->bi_bdev = super->s_bdev;
- bio->bi_sector = ofs >> 9;
+ bio->bi_iter.bi_sector = ofs >> 9;
bio->bi_private = sb;
bio->bi_end_io = erase_end_io;
atomic_inc(&super->s_pending_writes);
@@ -226,10 +205,9 @@ static int do_erase(struct super_block *sb, u64 ofs, pgoff_t index,
bio->bi_io_vec[i].bv_offset = 0;
}
bio->bi_vcnt = nr_pages;
- bio->bi_idx = 0;
- bio->bi_size = nr_pages * PAGE_SIZE;
+ bio->bi_iter.bi_size = nr_pages * PAGE_SIZE;
bio->bi_bdev = super->s_bdev;
- bio->bi_sector = ofs >> 9;
+ bio->bi_iter.bi_sector = ofs >> 9;
bio->bi_private = sb;
bio->bi_end_io = erase_end_io;
atomic_inc(&super->s_pending_writes);
@@ -300,7 +278,7 @@ static int bdev_write_sb(struct super_block *sb, struct page *page)
static void bdev_put_device(struct logfs_super *s)
{
- close_bdev_exclusive(s->s_bdev, FMODE_READ|FMODE_WRITE);
+ blkdev_put(s->s_bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
}
static int bdev_can_write_buf(struct super_block *sb, u64 ofs)
@@ -325,13 +303,14 @@ int logfs_get_sb_bdev(struct logfs_super *p, struct file_system_type *type,
{
struct block_device *bdev;
- bdev = open_bdev_exclusive(devname, FMODE_READ|FMODE_WRITE, type);
+ bdev = blkdev_get_by_path(devname, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
+ type);
if (IS_ERR(bdev))
return PTR_ERR(bdev);
if (MAJOR(bdev->bd_dev) == MTD_BLOCK_MAJOR) {
int mtdnr = MINOR(bdev->bd_dev);
- close_bdev_exclusive(bdev, FMODE_READ|FMODE_WRITE);
+ blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
return logfs_get_sb_mtd(p, mtdnr);
}
diff --git a/fs/logfs/dev_mtd.c b/fs/logfs/dev_mtd.c
index 7466e9dcc8c..9c501449450 100644
--- a/fs/logfs/dev_mtd.c
+++ b/fs/logfs/dev_mtd.c
@@ -13,13 +13,14 @@
#define PAGE_OFS(ofs) ((ofs) & (PAGE_SIZE-1))
-static int mtd_read(struct super_block *sb, loff_t ofs, size_t len, void *buf)
+static int logfs_mtd_read(struct super_block *sb, loff_t ofs, size_t len,
+ void *buf)
{
struct mtd_info *mtd = logfs_super(sb)->s_mtd;
size_t retlen;
int ret;
- ret = mtd->read(mtd, ofs, len, &retlen, buf);
+ ret = mtd_read(mtd, ofs, len, &retlen, buf);
BUG_ON(ret == -EINVAL);
if (ret)
return ret;
@@ -31,7 +32,8 @@ static int mtd_read(struct super_block *sb, loff_t ofs, size_t len, void *buf)
return 0;
}
-static int mtd_write(struct super_block *sb, loff_t ofs, size_t len, void *buf)
+static int loffs_mtd_write(struct super_block *sb, loff_t ofs, size_t len,
+ void *buf)
{
struct logfs_super *super = logfs_super(sb);
struct mtd_info *mtd = super->s_mtd;
@@ -47,7 +49,7 @@ static int mtd_write(struct super_block *sb, loff_t ofs, size_t len, void *buf)
BUG_ON(len > PAGE_CACHE_SIZE);
page_start = ofs & PAGE_CACHE_MASK;
page_end = PAGE_CACHE_ALIGN(ofs + len) - 1;
- ret = mtd->write(mtd, ofs, len, &retlen, buf);
+ ret = mtd_write(mtd, ofs, len, &retlen, buf);
if (ret || (retlen != len))
return -EIO;
@@ -60,14 +62,15 @@ static int mtd_write(struct super_block *sb, loff_t ofs, size_t len, void *buf)
* asynchronous properties. So just to prevent the first implementor of such
* a thing from breaking logfs in 2350, we do the usual pointless dance to
* declare a completion variable and wait for completion before returning
- * from mtd_erase(). What an excercise in futility!
+ * from logfs_mtd_erase(). What an exercise in futility!
*/
static void logfs_erase_callback(struct erase_info *ei)
{
complete((struct completion *)ei->priv);
}
-static int mtd_erase_mapping(struct super_block *sb, loff_t ofs, size_t len)
+static int logfs_mtd_erase_mapping(struct super_block *sb, loff_t ofs,
+ size_t len)
{
struct logfs_super *super = logfs_super(sb);
struct address_space *mapping = super->s_mapping_inode->i_mapping;
@@ -84,7 +87,7 @@ static int mtd_erase_mapping(struct super_block *sb, loff_t ofs, size_t len)
return 0;
}
-static int mtd_erase(struct super_block *sb, loff_t ofs, size_t len,
+static int logfs_mtd_erase(struct super_block *sb, loff_t ofs, size_t len,
int ensure_write)
{
struct mtd_info *mtd = logfs_super(sb)->s_mtd;
@@ -102,30 +105,29 @@ static int mtd_erase(struct super_block *sb, loff_t ofs, size_t len,
ei.len = len;
ei.callback = logfs_erase_callback;
ei.priv = (long)&complete;
- ret = mtd->erase(mtd, &ei);
+ ret = mtd_erase(mtd, &ei);
if (ret)
return -EIO;
wait_for_completion(&complete);
if (ei.state != MTD_ERASE_DONE)
return -EIO;
- return mtd_erase_mapping(sb, ofs, len);
+ return logfs_mtd_erase_mapping(sb, ofs, len);
}
-static void mtd_sync(struct super_block *sb)
+static void logfs_mtd_sync(struct super_block *sb)
{
struct mtd_info *mtd = logfs_super(sb)->s_mtd;
- if (mtd->sync)
- mtd->sync(mtd);
+ mtd_sync(mtd);
}
-static int mtd_readpage(void *_sb, struct page *page)
+static int logfs_mtd_readpage(void *_sb, struct page *page)
{
struct super_block *sb = _sb;
int err;
- err = mtd_read(sb, page->index << PAGE_SHIFT, PAGE_SIZE,
+ err = logfs_mtd_read(sb, page->index << PAGE_SHIFT, PAGE_SIZE,
page_address(page));
if (err == -EUCLEAN || err == -EBADMSG) {
/* -EBADMSG happens regularly on power failures */
@@ -143,18 +145,15 @@ static int mtd_readpage(void *_sb, struct page *page)
return err;
}
-static struct page *mtd_find_first_sb(struct super_block *sb, u64 *ofs)
+static struct page *logfs_mtd_find_first_sb(struct super_block *sb, u64 *ofs)
{
struct logfs_super *super = logfs_super(sb);
struct address_space *mapping = super->s_mapping_inode->i_mapping;
- filler_t *filler = mtd_readpage;
+ filler_t *filler = logfs_mtd_readpage;
struct mtd_info *mtd = super->s_mtd;
- if (!mtd->block_isbad)
- return NULL;
-
*ofs = 0;
- while (mtd->block_isbad(mtd, *ofs)) {
+ while (mtd_block_isbad(mtd, *ofs)) {
*ofs += mtd->erasesize;
if (*ofs >= mtd->size)
return NULL;
@@ -163,18 +162,15 @@ static struct page *mtd_find_first_sb(struct super_block *sb, u64 *ofs)
return read_cache_page(mapping, *ofs >> PAGE_SHIFT, filler, sb);
}
-static struct page *mtd_find_last_sb(struct super_block *sb, u64 *ofs)
+static struct page *logfs_mtd_find_last_sb(struct super_block *sb, u64 *ofs)
{
struct logfs_super *super = logfs_super(sb);
struct address_space *mapping = super->s_mapping_inode->i_mapping;
- filler_t *filler = mtd_readpage;
+ filler_t *filler = logfs_mtd_readpage;
struct mtd_info *mtd = super->s_mtd;
- if (!mtd->block_isbad)
- return NULL;
-
*ofs = mtd->size - mtd->erasesize;
- while (mtd->block_isbad(mtd, *ofs)) {
+ while (mtd_block_isbad(mtd, *ofs)) {
*ofs -= mtd->erasesize;
if (*ofs <= 0)
return NULL;
@@ -184,7 +180,7 @@ static struct page *mtd_find_last_sb(struct super_block *sb, u64 *ofs)
return read_cache_page(mapping, *ofs >> PAGE_SHIFT, filler, sb);
}
-static int __mtd_writeseg(struct super_block *sb, u64 ofs, pgoff_t index,
+static int __logfs_mtd_writeseg(struct super_block *sb, u64 ofs, pgoff_t index,
size_t nr_pages)
{
struct logfs_super *super = logfs_super(sb);
@@ -196,8 +192,8 @@ static int __mtd_writeseg(struct super_block *sb, u64 ofs, pgoff_t index,
page = find_lock_page(mapping, index + i);
BUG_ON(!page);
- err = mtd_write(sb, page->index << PAGE_SHIFT, PAGE_SIZE,
- page_address(page));
+ err = loffs_mtd_write(sb, page->index << PAGE_SHIFT, PAGE_SIZE,
+ page_address(page));
unlock_page(page);
page_cache_release(page);
if (err)
@@ -206,7 +202,7 @@ static int __mtd_writeseg(struct super_block *sb, u64 ofs, pgoff_t index,
return 0;
}
-static void mtd_writeseg(struct super_block *sb, u64 ofs, size_t len)
+static void logfs_mtd_writeseg(struct super_block *sb, u64 ofs, size_t len)
{
struct logfs_super *super = logfs_super(sb);
int head;
@@ -227,15 +223,15 @@ static void mtd_writeseg(struct super_block *sb, u64 ofs, size_t len)
len += head;
}
len = PAGE_ALIGN(len);
- __mtd_writeseg(sb, ofs, ofs >> PAGE_SHIFT, len >> PAGE_SHIFT);
+ __logfs_mtd_writeseg(sb, ofs, ofs >> PAGE_SHIFT, len >> PAGE_SHIFT);
}
-static void mtd_put_device(struct logfs_super *s)
+static void logfs_mtd_put_device(struct logfs_super *s)
{
put_mtd_device(s->s_mtd);
}
-static int mtd_can_write_buf(struct super_block *sb, u64 ofs)
+static int logfs_mtd_can_write_buf(struct super_block *sb, u64 ofs)
{
struct logfs_super *super = logfs_super(sb);
void *buf;
@@ -244,7 +240,7 @@ static int mtd_can_write_buf(struct super_block *sb, u64 ofs)
buf = kmalloc(super->s_writesize, GFP_KERNEL);
if (!buf)
return -ENOMEM;
- err = mtd_read(sb, ofs, super->s_writesize, buf);
+ err = logfs_mtd_read(sb, ofs, super->s_writesize, buf);
if (err)
goto out;
if (memchr_inv(buf, 0xff, super->s_writesize))
@@ -255,14 +251,14 @@ out:
}
static const struct logfs_device_ops mtd_devops = {
- .find_first_sb = mtd_find_first_sb,
- .find_last_sb = mtd_find_last_sb,
- .readpage = mtd_readpage,
- .writeseg = mtd_writeseg,
- .erase = mtd_erase,
- .can_write_buf = mtd_can_write_buf,
- .sync = mtd_sync,
- .put_device = mtd_put_device,
+ .find_first_sb = logfs_mtd_find_first_sb,
+ .find_last_sb = logfs_mtd_find_last_sb,
+ .readpage = logfs_mtd_readpage,
+ .writeseg = logfs_mtd_writeseg,
+ .erase = logfs_mtd_erase,
+ .can_write_buf = logfs_mtd_can_write_buf,
+ .sync = logfs_mtd_sync,
+ .put_device = logfs_mtd_put_device,
};
int logfs_get_sb_mtd(struct logfs_super *s, int mtdnr)
diff --git a/fs/logfs/dir.c b/fs/logfs/dir.c
index 409dfd65e9a..6bdc347008f 100644
--- a/fs/logfs/dir.c
+++ b/fs/logfs/dir.c
@@ -71,7 +71,7 @@ static int write_dir(struct inode *dir, struct logfs_disk_dentry *dd,
static int write_inode(struct inode *inode)
{
- return __logfs_write_inode(inode, WF_LOCK);
+ return __logfs_write_inode(inode, NULL, WF_LOCK);
}
static s64 dir_seek_data(struct inode *inode, s64 pos)
@@ -92,7 +92,7 @@ static int beyond_eof(struct inode *inode, loff_t bix)
* so short names (len <= 9) don't even occupy the complete 32bit name
* space. A prime >256 ensures short names quickly spread the 32bit
* name space. Add about 26 for the estimated amount of information
- * of each character and pick a prime nearby, preferrably a bit-sparse
+ * of each character and pick a prime nearby, preferably a bit-sparse
* one.
*/
static u32 hash_32(const char *s, int len, u32 seed)
@@ -177,17 +177,17 @@ static struct page *logfs_get_dd_page(struct inode *dir, struct dentry *dentry)
(filler_t *)logfs_readpage, NULL);
if (IS_ERR(page))
return page;
- dd = kmap_atomic(page, KM_USER0);
+ dd = kmap_atomic(page);
BUG_ON(dd->namelen == 0);
if (name->len != be16_to_cpu(dd->namelen) ||
memcmp(name->name, dd->name, name->len)) {
- kunmap_atomic(dd, KM_USER0);
+ kunmap_atomic(dd);
page_cache_release(page);
continue;
}
- kunmap_atomic(dd, KM_USER0);
+ kunmap_atomic(dd);
return page;
}
return NULL;
@@ -197,7 +197,7 @@ static int logfs_remove_inode(struct inode *inode)
{
int ret;
- inode->i_nlink--;
+ drop_nlink(inode);
ret = write_inode(inode);
LOGFS_BUG_ON(ret, inode->i_sb);
return ret;
@@ -281,17 +281,23 @@ static int logfs_rmdir(struct inode *dir, struct dentry *dentry)
/* FIXME: readdir currently has it's own dir_walk code. I don't see a good
* way to combine the two copies */
-#define IMPLICIT_NODES 2
-static int __logfs_readdir(struct file *file, void *buf, filldir_t filldir)
+static int logfs_readdir(struct file *file, struct dir_context *ctx)
{
- struct inode *dir = file->f_dentry->d_inode;
- loff_t pos = file->f_pos - IMPLICIT_NODES;
+ struct inode *dir = file_inode(file);
+ loff_t pos;
struct page *page;
struct logfs_disk_dentry *dd;
- int full;
+ if (ctx->pos < 0)
+ return -EINVAL;
+
+ if (!dir_emit_dots(file, ctx))
+ return 0;
+
+ pos = ctx->pos - 2;
BUG_ON(pos < 0);
- for (;; pos++) {
+ for (;; pos++, ctx->pos++) {
+ bool full;
if (beyond_eof(dir, pos))
break;
if (!logfs_exist_block(dir, pos)) {
@@ -306,42 +312,17 @@ static int __logfs_readdir(struct file *file, void *buf, filldir_t filldir)
dd = kmap(page);
BUG_ON(dd->namelen == 0);
- full = filldir(buf, (char *)dd->name, be16_to_cpu(dd->namelen),
- pos, be64_to_cpu(dd->ino), dd->type);
+ full = !dir_emit(ctx, (char *)dd->name,
+ be16_to_cpu(dd->namelen),
+ be64_to_cpu(dd->ino), dd->type);
kunmap(page);
page_cache_release(page);
if (full)
break;
}
-
- file->f_pos = pos + IMPLICIT_NODES;
return 0;
}
-static int logfs_readdir(struct file *file, void *buf, filldir_t filldir)
-{
- struct inode *inode = file->f_dentry->d_inode;
- ino_t pino = parent_ino(file->f_dentry);
- int err;
-
- if (file->f_pos < 0)
- return -EINVAL;
-
- if (file->f_pos == 0) {
- if (filldir(buf, ".", 1, 1, inode->i_ino, DT_DIR) < 0)
- return 0;
- file->f_pos++;
- }
- if (file->f_pos == 1) {
- if (filldir(buf, "..", 2, 2, pino, DT_DIR) < 0)
- return 0;
- file->f_pos++;
- }
-
- err = __logfs_readdir(file, buf, filldir);
- return err;
-}
-
static void logfs_set_name(struct logfs_disk_dentry *dd, struct qstr *name)
{
dd->namelen = cpu_to_be16(name->len);
@@ -349,7 +330,7 @@ static void logfs_set_name(struct logfs_disk_dentry *dd, struct qstr *name)
}
static struct dentry *logfs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct page *page;
struct logfs_disk_dentry *dd;
@@ -365,17 +346,15 @@ static struct dentry *logfs_lookup(struct inode *dir, struct dentry *dentry,
return NULL;
}
index = page->index;
- dd = kmap_atomic(page, KM_USER0);
+ dd = kmap_atomic(page);
ino = be64_to_cpu(dd->ino);
- kunmap_atomic(dd, KM_USER0);
+ kunmap_atomic(dd);
page_cache_release(page);
inode = logfs_iget(dir->i_sb, ino);
- if (IS_ERR(inode)) {
+ if (IS_ERR(inode))
printk(KERN_ERR"LogFS: Cannot read inode #%llx for dentry (%lx, %lx)n",
ino, dir->i_ino, index);
- return ERR_CAST(inode);
- }
return d_splice_alias(inode, dentry);
}
@@ -404,12 +383,12 @@ static int logfs_write_dir(struct inode *dir, struct dentry *dentry,
if (!page)
return -ENOMEM;
- dd = kmap_atomic(page, KM_USER0);
+ dd = kmap_atomic(page);
memset(dd, 0, sizeof(*dd));
dd->ino = cpu_to_be64(inode->i_ino);
dd->type = logfs_type(inode);
logfs_set_name(dd, &dentry->d_name);
- kunmap_atomic(dd, KM_USER0);
+ kunmap_atomic(dd);
err = logfs_write_buf(dir, page, WF_LOCK);
unlock_page(page);
@@ -435,7 +414,7 @@ static int __logfs_create(struct inode *dir, struct dentry *dentry,
ta = kzalloc(sizeof(*ta), GFP_KERNEL);
if (!ta) {
- inode->i_nlink--;
+ drop_nlink(inode);
iput(inode);
return -ENOMEM;
}
@@ -458,7 +437,7 @@ static int __logfs_create(struct inode *dir, struct dentry *dentry,
abort_transaction(inode, ta);
li->li_flags |= LOGFS_IF_STILLBORN;
/* FIXME: truncate symlink */
- inode->i_nlink--;
+ drop_nlink(inode);
iput(inode);
goto out;
}
@@ -484,7 +463,7 @@ out:
return ret;
}
-static int logfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+static int logfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
{
struct inode *inode;
@@ -503,8 +482,8 @@ static int logfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
return __logfs_create(dir, dentry, inode, NULL, 0);
}
-static int logfs_create(struct inode *dir, struct dentry *dentry, int mode,
- struct nameidata *nd)
+static int logfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
+ bool excl)
{
struct inode *inode;
@@ -519,7 +498,7 @@ static int logfs_create(struct inode *dir, struct dentry *dentry, int mode,
return __logfs_create(dir, dentry, inode, NULL, 0);
}
-static int logfs_mknod(struct inode *dir, struct dentry *dentry, int mode,
+static int logfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
dev_t rdev)
{
struct inode *inode;
@@ -555,22 +534,14 @@ static int logfs_symlink(struct inode *dir, struct dentry *dentry,
return __logfs_create(dir, dentry, inode, target, destlen);
}
-static int logfs_permission(struct inode *inode, int mask)
-{
- return generic_permission(inode, mask, NULL);
-}
-
static int logfs_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
struct inode *inode = old_dentry->d_inode;
- if (inode->i_nlink >= LOGFS_LINK_MAX)
- return -EMLINK;
-
inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
ihold(inode);
- inode->i_nlink++;
+ inc_nlink(inode);
mark_inode_dirty_sync(inode);
return __logfs_create(dir, dentry, inode, NULL, 0);
@@ -586,9 +557,9 @@ static int logfs_get_dd(struct inode *dir, struct dentry *dentry,
if (IS_ERR(page))
return PTR_ERR(page);
*pos = page->index;
- map = kmap_atomic(page, KM_USER0);
+ map = kmap_atomic(page);
memcpy(dd, map, sizeof(*dd));
- kunmap_atomic(map, KM_USER0);
+ kunmap_atomic(map);
page_cache_release(page);
return 0;
}
@@ -818,14 +789,13 @@ const struct inode_operations logfs_dir_iops = {
.mknod = logfs_mknod,
.rename = logfs_rename,
.rmdir = logfs_rmdir,
- .permission = logfs_permission,
.symlink = logfs_symlink,
.unlink = logfs_unlink,
};
const struct file_operations logfs_dir_fops = {
.fsync = logfs_fsync,
.unlocked_ioctl = logfs_ioctl,
- .readdir = logfs_readdir,
+ .iterate = logfs_readdir,
.read = generic_read_dir,
.llseek = default_llseek,
};
diff --git a/fs/logfs/file.c b/fs/logfs/file.c
index e86376b87af..8538752df2f 100644
--- a/fs/logfs/file.c
+++ b/fs/logfs/file.c
@@ -159,7 +159,8 @@ static int logfs_writepage(struct page *page, struct writeback_control *wbc)
return __logfs_writepage(page);
}
-static void logfs_invalidatepage(struct page *page, unsigned long offset)
+static void logfs_invalidatepage(struct page *page, unsigned int offset,
+ unsigned int length)
{
struct logfs_block *block = logfs_block(page);
@@ -183,7 +184,7 @@ static int logfs_releasepage(struct page *page, gfp_t only_xfs_uses_this)
long logfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
struct logfs_inode *li = logfs_inode(inode);
unsigned int oldflags, flags;
int err;
@@ -196,7 +197,7 @@ long logfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
if (IS_RDONLY(inode))
return -EROFS;
- if (!is_owner_or_cap(inode))
+ if (!inode_owner_or_capable(inode))
return -EACCES;
err = get_user(flags, (int __user *)arg);
@@ -219,11 +220,22 @@ long logfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
}
}
-int logfs_fsync(struct file *file, int datasync)
+int logfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
{
struct super_block *sb = file->f_mapping->host->i_sb;
+ struct inode *inode = file->f_mapping->host;
+ int ret;
+
+ ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+ if (ret)
+ return ret;
+ mutex_lock(&inode->i_mutex);
+ logfs_get_wblocks(sb, NULL, WF_LOCK);
logfs_write_anchor(sb);
+ logfs_put_wblocks(sb, NULL, WF_LOCK);
+ mutex_unlock(&inode->i_mutex);
+
return 0;
}
@@ -252,15 +264,15 @@ const struct inode_operations logfs_reg_iops = {
};
const struct file_operations logfs_reg_fops = {
- .aio_read = generic_file_aio_read,
- .aio_write = generic_file_aio_write,
+ .read_iter = generic_file_read_iter,
+ .write_iter = generic_file_write_iter,
.fsync = logfs_fsync,
.unlocked_ioctl = logfs_ioctl,
.llseek = generic_file_llseek,
.mmap = generic_file_readonly_mmap,
.open = generic_file_open,
- .read = do_sync_read,
- .write = do_sync_write,
+ .read = new_sync_read,
+ .write = new_sync_write,
};
const struct address_space_operations logfs_reg_aops = {
diff --git a/fs/logfs/gc.c b/fs/logfs/gc.c
index caa4419285d..d4efb061bdc 100644
--- a/fs/logfs/gc.c
+++ b/fs/logfs/gc.c
@@ -367,7 +367,7 @@ static struct gc_candidate *get_candidate(struct super_block *sb)
int i, max_dist;
struct gc_candidate *cand = NULL, *this;
- max_dist = min(no_free_segments(sb), LOGFS_NO_AREAS);
+ max_dist = min(no_free_segments(sb), LOGFS_NO_AREAS - 1);
for (i = max_dist; i >= 0; i--) {
this = first_in_list(&super->s_low_list[i]);
diff --git a/fs/logfs/inode.c b/fs/logfs/inode.c
index d8c71ece098..af49e2d6941 100644
--- a/fs/logfs/inode.c
+++ b/fs/logfs/inode.c
@@ -33,7 +33,7 @@
* are being written out - and waiting for GC to make progress, naturally.
*
* So we cannot just call iget() or some variant of it, but first have to check
- * wether the inode in question might be in I_FREEING state. Therefore we
+ * whether the inode in question might be in I_FREEING state. Therefore we
* maintain our own per-sb list of "almost deleted" inodes and check against
* that list first. Normally this should be at most 1-2 entries long.
*
@@ -93,7 +93,7 @@ static struct inode *__logfs_iget(struct super_block *sb, ino_t ino)
/* inode->i_nlink == 0 can be true when called from
* block validator */
/* set i_nlink to 0 to prevent caching */
- inode->i_nlink = 0;
+ clear_nlink(inode);
logfs_inode(inode)->li_flags |= LOGFS_IF_ZOMBIE;
iget_failed(inode);
if (!err)
@@ -141,19 +141,41 @@ struct inode *logfs_safe_iget(struct super_block *sb, ino_t ino, int *is_cached)
return __logfs_iget(sb, ino);
}
+static void logfs_i_callback(struct rcu_head *head)
+{
+ struct inode *inode = container_of(head, struct inode, i_rcu);
+ kmem_cache_free(logfs_inode_cache, logfs_inode(inode));
+}
+
static void __logfs_destroy_inode(struct inode *inode)
{
struct logfs_inode *li = logfs_inode(inode);
BUG_ON(li->li_block);
list_del(&li->li_freeing_list);
- kmem_cache_free(logfs_inode_cache, li);
+ call_rcu(&inode->i_rcu, logfs_i_callback);
+}
+
+static void __logfs_destroy_meta_inode(struct inode *inode)
+{
+ struct logfs_inode *li = logfs_inode(inode);
+ BUG_ON(li->li_block);
+ call_rcu(&inode->i_rcu, logfs_i_callback);
}
static void logfs_destroy_inode(struct inode *inode)
{
struct logfs_inode *li = logfs_inode(inode);
+ if (inode->i_ino < LOGFS_RESERVED_INOS) {
+ /*
+ * The reserved inodes are never destroyed unless we are in
+ * unmont path.
+ */
+ __logfs_destroy_meta_inode(inode);
+ return;
+ }
+
BUG_ON(list_empty(&li->li_freeing_list));
spin_lock(&logfs_inode_lock);
li->li_refcount--;
@@ -186,13 +208,12 @@ static void logfs_init_inode(struct super_block *sb, struct inode *inode)
li->li_height = 0;
li->li_used_bytes = 0;
li->li_block = NULL;
- inode->i_uid = 0;
- inode->i_gid = 0;
+ i_uid_write(inode, 0);
+ i_gid_write(inode, 0);
inode->i_size = 0;
inode->i_blocks = 0;
inode->i_ctime = CURRENT_TIME;
inode->i_mtime = CURRENT_TIME;
- inode->i_nlink = 1;
li->li_refcount = 1;
INIT_LIST_HEAD(&li->li_freeing_list);
@@ -281,12 +302,12 @@ static int logfs_write_inode(struct inode *inode, struct writeback_control *wbc)
if (logfs_inode(inode)->li_flags & LOGFS_IF_STILLBORN)
return 0;
- ret = __logfs_write_inode(inode, flags);
+ ret = __logfs_write_inode(inode, NULL, flags);
LOGFS_BUG_ON(ret, inode->i_sb);
return ret;
}
-/* called with inode_lock held */
+/* called with inode->i_lock held */
static int logfs_drop_inode(struct inode *inode)
{
struct logfs_super *super = logfs_super(inode->i_sb);
@@ -318,7 +339,7 @@ static void logfs_set_ino_generation(struct super_block *sb,
mutex_unlock(&super->s_journal_mutex);
}
-struct inode *logfs_new_inode(struct inode *dir, int mode)
+struct inode *logfs_new_inode(struct inode *dir, umode_t mode)
{
struct super_block *sb = dir->i_sb;
struct inode *inode;
@@ -358,7 +379,9 @@ static void logfs_init_once(void *_li)
static int logfs_sync_fs(struct super_block *sb, int wait)
{
+ logfs_get_wblocks(sb, NULL, WF_LOCK);
logfs_write_anchor(sb);
+ logfs_put_wblocks(sb, NULL, WF_LOCK);
return 0;
}
@@ -366,8 +389,8 @@ static void logfs_put_super(struct super_block *sb)
{
struct logfs_super *super = logfs_super(sb);
/* kill the meta-inodes */
- iput(super->s_master_inode);
iput(super->s_segfile_inode);
+ iput(super->s_master_inode);
iput(super->s_mapping_inode);
}
@@ -394,5 +417,10 @@ int logfs_init_inode_cache(void)
void logfs_destroy_inode_cache(void)
{
+ /*
+ * Make sure all delayed rcu free inodes are flushed before we
+ * destroy cache.
+ */
+ rcu_barrier();
kmem_cache_destroy(logfs_inode_cache);
}
diff --git a/fs/logfs/journal.c b/fs/logfs/journal.c
index f46ee8b0e13..2a09b8d7398 100644
--- a/fs/logfs/journal.c
+++ b/fs/logfs/journal.c
@@ -565,7 +565,7 @@ static void write_wbuf(struct super_block *sb, struct logfs_area *area,
index = ofs >> PAGE_SHIFT;
page_ofs = ofs & (PAGE_SIZE - 1);
- page = find_lock_page(mapping, index);
+ page = find_or_create_page(mapping, index, GFP_NOFS);
BUG_ON(!page);
memcpy(wbuf, page_address(page) + page_ofs, super->s_writesize);
unlock_page(page);
@@ -612,7 +612,6 @@ static size_t __logfs_write_je(struct super_block *sb, void *buf, u16 type,
if (len == 0)
return logfs_write_header(super, header, 0, type);
- BUG_ON(len > sb->s_blocksize);
compr_len = logfs_compress(buf, data, len, sb->s_blocksize);
if (compr_len < 0 || type == JE_ANCHOR) {
memcpy(data, buf, len);
@@ -828,7 +827,7 @@ void do_logfs_journal_wl_pass(struct super_block *sb)
super->s_journal_seg[i] = segno;
super->s_journal_ec[i] = ec;
logfs_set_segment_reserved(sb, segno);
- err = btree_insert32(head, segno, (void *)1, GFP_KERNEL);
+ err = btree_insert32(head, segno, (void *)1, GFP_NOFS);
BUG_ON(err); /* mempool should prevent this */
err = logfs_erase_segment(sb, segno, 1);
BUG_ON(err); /* FIXME: remount-ro would be nicer */
diff --git a/fs/logfs/logfs.h b/fs/logfs/logfs.h
index 57afd4a6fab..5f093760946 100644
--- a/fs/logfs/logfs.h
+++ b/fs/logfs/logfs.h
@@ -506,7 +506,7 @@ extern const struct file_operations logfs_reg_fops;
extern const struct address_space_operations logfs_reg_aops;
int logfs_readpage(struct file *file, struct page *page);
long logfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
-int logfs_fsync(struct file *file, int datasync);
+int logfs_fsync(struct file *file, loff_t start, loff_t end, int datasync);
/* gc.c */
u32 get_best_cand(struct super_block *sb, struct candidate_list *list, u32 *ec);
@@ -520,7 +520,7 @@ extern const struct super_operations logfs_super_operations;
struct inode *logfs_iget(struct super_block *sb, ino_t ino);
struct inode *logfs_safe_iget(struct super_block *sb, ino_t ino, int *cookie);
void logfs_safe_iput(struct inode *inode, int cookie);
-struct inode *logfs_new_inode(struct inode *dir, int mode);
+struct inode *logfs_new_inode(struct inode *dir, umode_t mode);
struct inode *logfs_new_meta_inode(struct super_block *sb, u64 ino);
struct inode *logfs_read_meta_inode(struct super_block *sb, u64 ino);
int logfs_init_inode_cache(void);
@@ -528,7 +528,7 @@ void logfs_destroy_inode_cache(void);
void logfs_set_blocks(struct inode *inode, u64 no);
/* these logically belong into inode.c but actually reside in readwrite.c */
int logfs_read_inode(struct inode *inode);
-int __logfs_write_inode(struct inode *inode, long flags);
+int __logfs_write_inode(struct inode *inode, struct page *, long flags);
void logfs_evict_inode(struct inode *inode);
/* journal.c */
@@ -577,6 +577,8 @@ void initialize_block_counters(struct page *page, struct logfs_block *block,
__be64 *array, int page_is_empty);
int logfs_exist_block(struct inode *inode, u64 bix);
int get_page_reserve(struct inode *inode, struct page *page);
+void logfs_get_wblocks(struct super_block *sb, struct page *page, int lock);
+void logfs_put_wblocks(struct super_block *sb, struct page *page, int lock);
extern struct logfs_block_ops indirect_block_ops;
/* segment.c */
@@ -594,6 +596,7 @@ int logfs_init_mapping(struct super_block *sb);
void logfs_sync_area(struct logfs_area *area);
void logfs_sync_segments(struct super_block *sb);
void freeseg(struct super_block *sb, u32 segno);
+void free_areas(struct super_block *sb);
/* area handling */
int logfs_init_areas(struct super_block *sb);
@@ -618,7 +621,6 @@ static inline int logfs_buf_recover(struct logfs_area *area, u64 ofs,
struct page *emergency_read_begin(struct address_space *mapping, pgoff_t index);
void emergency_read_end(struct page *page);
void logfs_crash_dump(struct super_block *sb);
-void *memchr_inv(const void *s, int c, size_t n);
int logfs_statfs(struct dentry *dentry, struct kstatfs *stats);
int logfs_check_ds(struct logfs_disk_super *ds);
int logfs_write_sb(struct super_block *sb);
diff --git a/fs/logfs/readwrite.c b/fs/logfs/readwrite.c
index 6127baf0e18..48140315f62 100644
--- a/fs/logfs/readwrite.c
+++ b/fs/logfs/readwrite.c
@@ -119,14 +119,14 @@ static void logfs_disk_to_inode(struct logfs_disk_inode *di, struct inode*inode)
inode->i_mode = be16_to_cpu(di->di_mode);
li->li_height = di->di_height;
li->li_flags = be32_to_cpu(di->di_flags);
- inode->i_uid = be32_to_cpu(di->di_uid);
- inode->i_gid = be32_to_cpu(di->di_gid);
+ i_uid_write(inode, be32_to_cpu(di->di_uid));
+ i_gid_write(inode, be32_to_cpu(di->di_gid));
inode->i_size = be64_to_cpu(di->di_size);
logfs_set_blocks(inode, be64_to_cpu(di->di_used_bytes));
inode->i_atime = be64_to_timespec(di->di_atime);
inode->i_ctime = be64_to_timespec(di->di_ctime);
inode->i_mtime = be64_to_timespec(di->di_mtime);
- inode->i_nlink = be32_to_cpu(di->di_refcount);
+ set_nlink(inode, be32_to_cpu(di->di_refcount));
inode->i_generation = be32_to_cpu(di->di_generation);
switch (inode->i_mode & S_IFMT) {
@@ -156,8 +156,8 @@ static void logfs_inode_to_disk(struct inode *inode, struct logfs_disk_inode*di)
di->di_height = li->li_height;
di->di_pad = 0;
di->di_flags = cpu_to_be32(li->li_flags);
- di->di_uid = cpu_to_be32(inode->i_uid);
- di->di_gid = cpu_to_be32(inode->i_gid);
+ di->di_uid = cpu_to_be32(i_uid_read(inode));
+ di->di_gid = cpu_to_be32(i_gid_read(inode));
di->di_size = cpu_to_be64(i_size_read(inode));
di->di_used_bytes = cpu_to_be64(li->li_used_bytes);
di->di_atime = timespec_to_be64(inode->i_atime);
@@ -244,8 +244,7 @@ static void preunlock_page(struct super_block *sb, struct page *page, int lock)
* is waiting for s_write_mutex. We annotate this fact by setting PG_pre_locked
* in addition to PG_locked.
*/
-static void logfs_get_wblocks(struct super_block *sb, struct page *page,
- int lock)
+void logfs_get_wblocks(struct super_block *sb, struct page *page, int lock)
{
struct logfs_super *super = logfs_super(sb);
@@ -260,8 +259,7 @@ static void logfs_get_wblocks(struct super_block *sb, struct page *page,
}
}
-static void logfs_put_wblocks(struct super_block *sb, struct page *page,
- int lock)
+void logfs_put_wblocks(struct super_block *sb, struct page *page, int lock)
{
struct logfs_super *super = logfs_super(sb);
@@ -424,7 +422,7 @@ static void inode_write_block(struct logfs_block *block)
if (inode->i_ino == LOGFS_INO_MASTER)
logfs_write_anchor(inode->i_sb);
else {
- ret = __logfs_write_inode(inode, 0);
+ ret = __logfs_write_inode(inode, NULL, 0);
/* see indirect_write_block comment */
BUG_ON(ret);
}
@@ -481,7 +479,7 @@ static int inode_write_alias(struct super_block *sb,
val = inode_val0(inode);
break;
case INODE_USED_OFS:
- val = cpu_to_be64(li->li_used_bytes);;
+ val = cpu_to_be64(li->li_used_bytes);
break;
case INODE_SIZE_OFS:
val = cpu_to_be64(i_size_read(inode));
@@ -519,9 +517,9 @@ static int indirect_write_alias(struct super_block *sb,
ino = page->mapping->host->i_ino;
logfs_unpack_index(page->index, &bix, &level);
- child = kmap_atomic(page, KM_USER0);
+ child = kmap_atomic(page);
val = child[pos];
- kunmap_atomic(child, KM_USER0);
+ kunmap_atomic(child);
err = write_one_alias(sb, ino, bix, level, pos, val);
if (err)
return err;
@@ -560,8 +558,13 @@ static void inode_free_block(struct super_block *sb, struct logfs_block *block)
static void indirect_free_block(struct super_block *sb,
struct logfs_block *block)
{
- ClearPagePrivate(block->page);
- block->page->private = 0;
+ struct page *page = block->page;
+
+ if (PagePrivate(page)) {
+ ClearPagePrivate(page);
+ page_cache_release(page);
+ set_page_private(page, 0);
+ }
__free_block(sb, block);
}
@@ -650,8 +653,11 @@ static void alloc_data_block(struct inode *inode, struct page *page)
logfs_unpack_index(page->index, &bix, &level);
block = __alloc_block(inode->i_sb, inode->i_ino, bix, level);
block->page = page;
+
SetPagePrivate(page);
- page->private = (unsigned long)block;
+ page_cache_get(page);
+ set_page_private(page, (unsigned long) block);
+
block->ops = &indirect_block_ops;
}
@@ -667,9 +673,9 @@ static void alloc_indirect_block(struct inode *inode, struct page *page,
alloc_data_block(inode, page);
block = logfs_block(page);
- array = kmap_atomic(page, KM_USER0);
+ array = kmap_atomic(page);
initialize_block_counters(page, block, array, page_is_empty);
- kunmap_atomic(array, KM_USER0);
+ kunmap_atomic(array);
}
static void block_set_pointer(struct page *page, int index, u64 ptr)
@@ -679,10 +685,10 @@ static void block_set_pointer(struct page *page, int index, u64 ptr)
u64 oldptr;
BUG_ON(!block);
- array = kmap_atomic(page, KM_USER0);
+ array = kmap_atomic(page);
oldptr = be64_to_cpu(array[index]);
array[index] = cpu_to_be64(ptr);
- kunmap_atomic(array, KM_USER0);
+ kunmap_atomic(array);
SetPageUptodate(page);
block->full += !!(ptr & LOGFS_FULLY_POPULATED)
@@ -695,9 +701,9 @@ static u64 block_get_pointer(struct page *page, int index)
__be64 *block;
u64 ptr;
- block = kmap_atomic(page, KM_USER0);
+ block = kmap_atomic(page);
ptr = be64_to_cpu(block[index]);
- kunmap_atomic(block, KM_USER0);
+ kunmap_atomic(block);
return ptr;
}
@@ -844,7 +850,7 @@ static u64 seek_holedata_loop(struct inode *inode, u64 bix, int data)
}
slot = get_bits(bix, SUBLEVEL(level));
- rblock = kmap_atomic(page, KM_USER0);
+ rblock = kmap_atomic(page);
while (slot < LOGFS_BLOCK_FACTOR) {
if (data && (rblock[slot] != 0))
break;
@@ -855,12 +861,12 @@ static u64 seek_holedata_loop(struct inode *inode, u64 bix, int data)
bix &= ~(increment - 1);
}
if (slot >= LOGFS_BLOCK_FACTOR) {
- kunmap_atomic(rblock, KM_USER0);
+ kunmap_atomic(rblock);
logfs_put_read_page(page);
return bix;
}
bofs = be64_to_cpu(rblock[slot]);
- kunmap_atomic(rblock, KM_USER0);
+ kunmap_atomic(rblock);
logfs_put_read_page(page);
if (!bofs) {
BUG_ON(data);
@@ -1570,11 +1576,15 @@ int logfs_write_buf(struct inode *inode, struct page *page, long flags)
static int __logfs_delete(struct inode *inode, struct page *page)
{
long flags = WF_DELETE;
+ int err;
inode->i_ctime = inode->i_mtime = CURRENT_TIME;
if (page->index < I0_BLOCKS)
return logfs_write_direct(inode, page, flags);
+ err = grow_inode(inode, page->index, 0);
+ if (err)
+ return err;
return logfs_write_rec(inode, page, page->index, 0, flags);
}
@@ -1616,14 +1626,14 @@ int logfs_rewrite_block(struct inode *inode, u64 bix, u64 ofs,
err = logfs_write_buf(inode, page, flags);
if (!err && shrink_level(gc_level) == 0) {
/* Rewrite cannot mark the inode dirty but has to
- * write it immediatly.
+ * write it immediately.
* Q: Can't we just create an alias for the inode
* instead? And if not, why not?
*/
if (inode->i_ino == LOGFS_INO_MASTER)
logfs_write_anchor(inode->i_sb);
else {
- err = __logfs_write_inode(inode, flags);
+ err = __logfs_write_inode(inode, page, flags);
}
}
}
@@ -1873,13 +1883,19 @@ int logfs_truncate(struct inode *inode, u64 target)
logfs_get_wblocks(sb, NULL, 1);
err = __logfs_truncate(inode, size);
if (!err)
- err = __logfs_write_inode(inode, 0);
+ err = __logfs_write_inode(inode, NULL, 0);
logfs_put_wblocks(sb, NULL, 1);
}
- if (!err)
- err = vmtruncate(inode, target);
+ if (!err) {
+ err = inode_newsize_ok(inode, target);
+ if (err)
+ goto out;
+ truncate_setsize(inode, target);
+ }
+
+ out:
/* I don't trust error recovery yet. */
WARN_ON(err);
return err;
@@ -1901,8 +1917,11 @@ static void move_page_to_inode(struct inode *inode, struct page *page)
li->li_block = block;
block->page = NULL;
- page->private = 0;
- ClearPagePrivate(page);
+ if (PagePrivate(page)) {
+ ClearPagePrivate(page);
+ page_cache_release(page);
+ set_page_private(page, 0);
+ }
}
static void move_inode_to_page(struct page *page, struct inode *inode)
@@ -1918,8 +1937,12 @@ static void move_inode_to_page(struct page *page, struct inode *inode)
BUG_ON(PagePrivate(page));
block->ops = &indirect_block_ops;
block->page = page;
- page->private = (unsigned long)block;
- SetPagePrivate(page);
+
+ if (!PagePrivate(page)) {
+ SetPagePrivate(page);
+ page_cache_get(page);
+ set_page_private(page, (unsigned long) block);
+ }
block->inode = NULL;
li->li_block = NULL;
@@ -1944,9 +1967,9 @@ int logfs_read_inode(struct inode *inode)
if (IS_ERR(page))
return PTR_ERR(page);
- di = kmap_atomic(page, KM_USER0);
+ di = kmap_atomic(page);
logfs_disk_to_inode(di, inode);
- kunmap_atomic(di, KM_USER0);
+ kunmap_atomic(di);
move_page_to_inode(inode, page);
page_cache_release(page);
return 0;
@@ -1965,9 +1988,9 @@ static struct page *inode_to_page(struct inode *inode)
if (!page)
return NULL;
- di = kmap_atomic(page, KM_USER0);
+ di = kmap_atomic(page);
logfs_inode_to_disk(inode, di);
- kunmap_atomic(di, KM_USER0);
+ kunmap_atomic(di);
move_inode_to_page(page, inode);
return page;
}
@@ -1994,6 +2017,9 @@ static int do_write_inode(struct inode *inode)
/* FIXME: transaction is part of logfs_block now. Is that enough? */
err = logfs_write_buf(master_inode, page, 0);
+ if (err)
+ move_page_to_inode(inode, page);
+
logfs_put_write_page(page);
return err;
}
@@ -2021,13 +2047,13 @@ static void logfs_mod_segment_entry(struct super_block *sb, u32 segno,
if (write)
alloc_indirect_block(inode, page, 0);
- se = kmap_atomic(page, KM_USER0);
+ se = kmap_atomic(page);
change_se(se + child_no, arg);
if (write) {
logfs_set_alias(sb, logfs_block(page), child_no);
BUG_ON((int)be32_to_cpu(se[child_no].valid) > super->s_segsize);
}
- kunmap_atomic(se, KM_USER0);
+ kunmap_atomic(se);
logfs_put_write_page(page);
}
@@ -2103,14 +2129,14 @@ void logfs_set_segment_unreserved(struct super_block *sb, u32 segno, u32 ec)
ec_level);
}
-int __logfs_write_inode(struct inode *inode, long flags)
+int __logfs_write_inode(struct inode *inode, struct page *page, long flags)
{
struct super_block *sb = inode->i_sb;
int ret;
- logfs_get_wblocks(sb, NULL, flags & WF_LOCK);
+ logfs_get_wblocks(sb, page, flags & WF_LOCK);
ret = do_write_inode(inode);
- logfs_put_wblocks(sb, NULL, flags & WF_LOCK);
+ logfs_put_wblocks(sb, page, flags & WF_LOCK);
return ret;
}
@@ -2154,8 +2180,8 @@ void logfs_evict_inode(struct inode *inode)
do_delete_inode(inode);
}
}
- truncate_inode_pages(&inode->i_data, 0);
- end_writeback(inode);
+ truncate_inode_pages_final(&inode->i_data);
+ clear_inode(inode);
/* Cheaper version of write_inode. All changes are concealed in
* aliases, which are moved back. No write to the medium happens.
@@ -2169,7 +2195,6 @@ void logfs_evict_inode(struct inode *inode)
return;
}
- BUG_ON(inode->i_ino < LOGFS_RESERVED_INOS);
page = inode_to_page(inode);
BUG_ON(!page); /* FIXME: Use emergency page */
logfs_put_write_page(page);
@@ -2225,10 +2250,10 @@ int logfs_inode_write(struct inode *inode, const void *buf, size_t count,
if (!page)
return -ENOMEM;
- pagebuf = kmap_atomic(page, KM_USER0);
+ pagebuf = kmap_atomic(page);
memcpy(pagebuf, buf, count);
flush_dcache_page(page);
- kunmap_atomic(pagebuf, KM_USER0);
+ kunmap_atomic(pagebuf);
if (i_size_read(inode) < pos + LOGFS_BLOCKSIZE)
i_size_write(inode, pos + LOGFS_BLOCKSIZE);
diff --git a/fs/logfs/segment.c b/fs/logfs/segment.c
index 9d518735325..7f9b096d8d5 100644
--- a/fs/logfs/segment.c
+++ b/fs/logfs/segment.c
@@ -62,7 +62,8 @@ static struct page *get_mapping_page(struct super_block *sb, pgoff_t index,
page = read_cache_page(mapping, index, filler, sb);
else {
page = find_or_create_page(mapping, index, GFP_NOFS);
- unlock_page(page);
+ if (page)
+ unlock_page(page);
}
return page;
}
@@ -86,7 +87,11 @@ int __logfs_buf_write(struct logfs_area *area, u64 ofs, void *buf, size_t len,
BUG_ON(!page); /* FIXME: reserve a pool */
SetPageUptodate(page);
memcpy(page_address(page) + offset, buf, copylen);
- SetPagePrivate(page);
+
+ if (!PagePrivate(page)) {
+ SetPagePrivate(page);
+ page_cache_get(page);
+ }
page_cache_release(page);
buf += copylen;
@@ -110,7 +115,10 @@ static void pad_partial_page(struct logfs_area *area)
page = get_mapping_page(sb, index, 0);
BUG_ON(!page); /* FIXME: reserve a pool */
memset(page_address(page) + offset, 0xff, len);
- SetPagePrivate(page);
+ if (!PagePrivate(page)) {
+ SetPagePrivate(page);
+ page_cache_get(page);
+ }
page_cache_release(page);
}
}
@@ -130,7 +138,10 @@ static void pad_full_pages(struct logfs_area *area)
BUG_ON(!page); /* FIXME: reserve a pool */
SetPageUptodate(page);
memset(page_address(page), 0xff, PAGE_CACHE_SIZE);
- SetPagePrivate(page);
+ if (!PagePrivate(page)) {
+ SetPagePrivate(page);
+ page_cache_get(page);
+ }
page_cache_release(page);
index++;
no_indizes--;
@@ -485,8 +496,12 @@ static void move_btree_to_page(struct inode *inode, struct page *page,
mempool_free(item, super->s_alias_pool);
}
block->page = page;
- SetPagePrivate(page);
- page->private = (unsigned long)block;
+
+ if (!PagePrivate(page)) {
+ SetPagePrivate(page);
+ page_cache_get(page);
+ set_page_private(page, (unsigned long) block);
+ }
block->ops = &indirect_block_ops;
initialize_block_counters(page, block, data, 0);
}
@@ -529,15 +544,19 @@ void move_page_to_btree(struct page *page)
BUG_ON(!item); /* mempool empty */
memset(item, 0, sizeof(*item));
- child = kmap_atomic(page, KM_USER0);
+ child = kmap_atomic(page);
item->val = child[pos];
- kunmap_atomic(child, KM_USER0);
+ kunmap_atomic(child);
item->child_no = pos;
list_add(&item->list, &block->item_list);
}
block->page = NULL;
- ClearPagePrivate(page);
- page->private = 0;
+
+ if (PagePrivate(page)) {
+ ClearPagePrivate(page);
+ page_cache_release(page);
+ set_page_private(page, 0);
+ }
block->ops = &btree_block_ops;
err = alias_tree_insert(block->sb, block->ino, block->bix, block->level,
block);
@@ -702,7 +721,10 @@ void freeseg(struct super_block *sb, u32 segno)
page = find_get_page(mapping, ofs >> PAGE_SHIFT);
if (!page)
continue;
- ClearPagePrivate(page);
+ if (PagePrivate(page)) {
+ ClearPagePrivate(page);
+ page_cache_release(page);
+ }
page_cache_release(page);
}
}
@@ -841,6 +863,16 @@ static void free_area(struct logfs_area *area)
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]);
+ free_area(super->s_journal_area);
+}
+
static struct logfs_area *alloc_area(struct super_block *sb)
{
struct logfs_area *area;
@@ -853,9 +885,10 @@ static struct logfs_area *alloc_area(struct super_block *sb)
return area;
}
-static void map_invalidatepage(struct page *page, unsigned long l)
+static void map_invalidatepage(struct page *page, unsigned int o,
+ unsigned int l)
{
- BUG();
+ return;
}
static int map_releasepage(struct page *page, gfp_t g)
@@ -923,10 +956,6 @@ 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);
}
diff --git a/fs/logfs/super.c b/fs/logfs/super.c
index 33435e4b14d..54360293bcb 100644
--- a/fs/logfs/super.c
+++ b/fs/logfs/super.c
@@ -13,6 +13,7 @@
#include <linux/bio.h>
#include <linux/slab.h>
#include <linux/blkdev.h>
+#include <linux/module.h>
#include <linux/mtd/mtd.h>
#include <linux/statfs.h>
#include <linux/buffer_head.h>
@@ -91,28 +92,6 @@ void logfs_crash_dump(struct super_block *sb)
}
/*
- * TODO: move to lib/string.c
- */
-/**
- * memchr_inv - Find a character in an area of memory.
- * @s: The memory area
- * @c: The byte to search for
- * @n: The size of the area.
- *
- * returns the address of the first character other than @c, or %NULL
- * if the whole buffer contains just @c.
- */
-void *memchr_inv(const void *s, int c, size_t n)
-{
- const unsigned char *p = s;
- while (n-- != 0)
- if ((unsigned char)c != *p++)
- return (void *)(p - 1);
-
- return NULL;
-}
-
-/*
* FIXME: There should be a reserve for root, similar to ext2.
*/
int logfs_statfs(struct dentry *dentry, struct kstatfs *stats)
@@ -336,11 +315,9 @@ static int logfs_get_sb_final(struct super_block *sb)
if (IS_ERR(rootdir))
goto fail;
- sb->s_root = d_alloc_root(rootdir);
- if (!sb->s_root) {
- iput(rootdir);
+ sb->s_root = d_make_root(rootdir);
+ if (!sb->s_root)
goto fail;
- }
/* at that point we know that ->put_super() will be called */
super->s_erase_page = alloc_pages(GFP_KERNEL, 0);
@@ -480,10 +457,6 @@ static int logfs_read_sb(struct super_block *sb, int read_only)
!read_only)
return -EIO;
- mutex_init(&super->s_dirop_mutex);
- mutex_init(&super->s_object_alias_mutex);
- INIT_LIST_HEAD(&super->s_freeing_list);
-
ret = logfs_init_rw(sb);
if (ret)
return ret;
@@ -511,14 +484,15 @@ 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);
@@ -545,7 +519,7 @@ static struct dentry *logfs_get_sb_device(struct logfs_super *super,
log_super("LogFS: Start mount %x\n", mount_count++);
err = -EINVAL;
- sb = sget(type, logfs_sb_test, logfs_sb_set, super);
+ sb = sget(type, logfs_sb_test, logfs_sb_set, flags | MS_NOATIME, super);
if (IS_ERR(sb)) {
super->s_devops->put_device(super);
kfree(super);
@@ -566,8 +540,8 @@ static struct dentry *logfs_get_sb_device(struct logfs_super *super,
* the filesystem incompatible with 32bit systems.
*/
sb->s_maxbytes = (1ull << 43) - 1;
+ sb->s_max_links = LOGFS_LINK_MAX;
sb->s_op = &logfs_super_operations;
- sb->s_flags = flags | MS_NOATIME;
err = logfs_read_sb(sb, sb->s_flags & MS_RDONLY);
if (err)
@@ -601,6 +575,10 @@ static struct dentry *logfs_mount(struct file_system_type *type, int flags,
if (!super)
return ERR_PTR(-ENOMEM);
+ mutex_init(&super->s_dirop_mutex);
+ mutex_init(&super->s_object_alias_mutex);
+ INIT_LIST_HEAD(&super->s_freeing_list);
+
if (!devname)
err = logfs_get_sb_bdev(super, type, devname);
else if (strncmp(devname, "mtd", 3))
@@ -630,6 +608,7 @@ static struct file_system_type logfs_fs_type = {
.fs_flags = FS_REQUIRES_DEV,
};
+MODULE_ALIAS_FS("logfs");
static int __init logfs_init(void)
{
@@ -647,7 +626,10 @@ static int __init logfs_init(void)
if (ret)
goto out2;
- return register_filesystem(&logfs_fs_type);
+ ret = register_filesystem(&logfs_fs_type);
+ if (!ret)
+ return 0;
+ logfs_destroy_inode_cache();
out2:
logfs_compr_exit();
out1:
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-05 12:58:42 +0000