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-rw-r--r--fs/nilfs2/Kconfig25
-rw-r--r--fs/nilfs2/bmap.c5
-rw-r--r--fs/nilfs2/cpfile.c5
-rw-r--r--fs/nilfs2/dat.c9
-rw-r--r--fs/nilfs2/dir.c1
-rw-r--r--fs/nilfs2/mdt.c4
-rw-r--r--fs/nilfs2/segment.c44
-rw-r--r--fs/nilfs2/super.c2
-rw-r--r--fs/nilfs2/the_nilfs.h2
9 files changed, 60 insertions, 37 deletions
diff --git a/fs/nilfs2/Kconfig b/fs/nilfs2/Kconfig
new file mode 100644
index 00000000000..72da095d400
--- /dev/null
+++ b/fs/nilfs2/Kconfig
@@ -0,0 +1,25 @@
+config NILFS2_FS
+ tristate "NILFS2 file system support (EXPERIMENTAL)"
+ depends on BLOCK && EXPERIMENTAL
+ select CRC32
+ help
+ NILFS2 is a log-structured file system (LFS) supporting continuous
+ snapshotting. In addition to versioning capability of the entire
+ file system, users can even restore files mistakenly overwritten or
+ destroyed just a few seconds ago. Since this file system can keep
+ consistency like conventional LFS, it achieves quick recovery after
+ system crashes.
+
+ NILFS2 creates a number of checkpoints every few seconds or per
+ synchronous write basis (unless there is no change). Users can
+ select significant versions among continuously created checkpoints,
+ and can change them into snapshots which will be preserved for long
+ periods until they are changed back to checkpoints. Each
+ snapshot is mountable as a read-only file system concurrently with
+ its writable mount, and this feature is convenient for online backup.
+
+ Some features including atime, extended attributes, and POSIX ACLs,
+ are not supported yet.
+
+ To compile this file system support as a module, choose M here: the
+ module will be called nilfs2. If unsure, say N.
diff --git a/fs/nilfs2/bmap.c b/fs/nilfs2/bmap.c
index 36df60b6d8a..99d58a028b9 100644
--- a/fs/nilfs2/bmap.c
+++ b/fs/nilfs2/bmap.c
@@ -568,6 +568,7 @@ void nilfs_bmap_abort_update_v(struct nilfs_bmap *bmap,
}
static struct lock_class_key nilfs_bmap_dat_lock_key;
+static struct lock_class_key nilfs_bmap_mdt_lock_key;
/**
* nilfs_bmap_read - read a bmap from an inode
@@ -603,7 +604,11 @@ int nilfs_bmap_read(struct nilfs_bmap *bmap, struct nilfs_inode *raw_inode)
bmap->b_ptr_type = NILFS_BMAP_PTR_VS;
bmap->b_last_allocated_key = 0;
bmap->b_last_allocated_ptr = NILFS_BMAP_INVALID_PTR;
+ lockdep_set_class(&bmap->b_sem, &nilfs_bmap_mdt_lock_key);
break;
+ case NILFS_IFILE_INO:
+ lockdep_set_class(&bmap->b_sem, &nilfs_bmap_mdt_lock_key);
+ /* Fall through */
default:
bmap->b_ptr_type = NILFS_BMAP_PTR_VM;
bmap->b_last_allocated_key = 0;
diff --git a/fs/nilfs2/cpfile.c b/fs/nilfs2/cpfile.c
index 7d49813f66d..aec942cf79e 100644
--- a/fs/nilfs2/cpfile.c
+++ b/fs/nilfs2/cpfile.c
@@ -307,7 +307,7 @@ int nilfs_cpfile_delete_checkpoints(struct inode *cpfile,
ret = nilfs_cpfile_get_checkpoint_block(cpfile, cno, 0, &cp_bh);
if (ret < 0) {
if (ret != -ENOENT)
- goto out_header;
+ break;
/* skip hole */
ret = 0;
continue;
@@ -340,7 +340,7 @@ int nilfs_cpfile_delete_checkpoints(struct inode *cpfile,
continue;
printk(KERN_ERR "%s: cannot delete block\n",
__func__);
- goto out_header;
+ break;
}
}
@@ -358,7 +358,6 @@ int nilfs_cpfile_delete_checkpoints(struct inode *cpfile,
kunmap_atomic(kaddr, KM_USER0);
}
- out_header:
brelse(header_bh);
out_sem:
diff --git a/fs/nilfs2/dat.c b/fs/nilfs2/dat.c
index 0b2710e2d56..8927ca27e6f 100644
--- a/fs/nilfs2/dat.c
+++ b/fs/nilfs2/dat.c
@@ -134,15 +134,6 @@ void nilfs_dat_commit_start(struct inode *dat, struct nilfs_palloc_req *req,
entry = nilfs_palloc_block_get_entry(dat, req->pr_entry_nr,
req->pr_entry_bh, kaddr);
entry->de_start = cpu_to_le64(nilfs_mdt_cno(dat));
- if (entry->de_blocknr != cpu_to_le64(0) ||
- entry->de_end != cpu_to_le64(NILFS_CNO_MAX)) {
- printk(KERN_CRIT
- "%s: vbn = %llu, start = %llu, end = %llu, pbn = %llu\n",
- __func__, (unsigned long long)req->pr_entry_nr,
- (unsigned long long)le64_to_cpu(entry->de_start),
- (unsigned long long)le64_to_cpu(entry->de_end),
- (unsigned long long)le64_to_cpu(entry->de_blocknr));
- }
entry->de_blocknr = cpu_to_le64(blocknr);
kunmap_atomic(kaddr, KM_USER0);
diff --git a/fs/nilfs2/dir.c b/fs/nilfs2/dir.c
index 54100acc110..1a4fa04cf07 100644
--- a/fs/nilfs2/dir.c
+++ b/fs/nilfs2/dir.c
@@ -43,7 +43,6 @@
*/
#include <linux/pagemap.h>
-#include <linux/smp_lock.h>
#include "nilfs.h"
#include "page.h"
diff --git a/fs/nilfs2/mdt.c b/fs/nilfs2/mdt.c
index 3d3ddb3f517..2dfd47714ae 100644
--- a/fs/nilfs2/mdt.c
+++ b/fs/nilfs2/mdt.c
@@ -412,8 +412,10 @@ nilfs_mdt_write_page(struct page *page, struct writeback_control *wbc)
return 0; /* Do not request flush for shadow page cache */
if (!sb) {
writer = nilfs_get_writer(NILFS_MDT(inode)->mi_nilfs);
- if (!writer)
+ if (!writer) {
+ nilfs_put_writer(NILFS_MDT(inode)->mi_nilfs);
return -EROFS;
+ }
sb = writer->s_super;
}
diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index aa977549919..51ff3d0a4ee 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -1829,26 +1829,13 @@ static int nilfs_segctor_write(struct nilfs_sc_info *sci,
err = nilfs_segbuf_write(segbuf, &wi);
res = nilfs_segbuf_wait(segbuf, &wi);
- err = unlikely(err) ? : res;
- if (unlikely(err))
+ err = err ? : res;
+ if (err)
return err;
}
return 0;
}
-static int nilfs_page_has_uncleared_buffer(struct page *page)
-{
- struct buffer_head *head, *bh;
-
- head = bh = page_buffers(page);
- do {
- if (buffer_dirty(bh) && !list_empty(&bh->b_assoc_buffers))
- return 1;
- bh = bh->b_this_page;
- } while (bh != head);
- return 0;
-}
-
static void __nilfs_end_page_io(struct page *page, int err)
{
if (!err) {
@@ -1872,13 +1859,26 @@ static void nilfs_end_page_io(struct page *page, int err)
if (!page)
return;
- if (buffer_nilfs_node(page_buffers(page)) &&
- nilfs_page_has_uncleared_buffer(page))
- /* For b-tree node pages, this function may be called twice
- or more because they might be split in a segment.
- This check assures that cleanup has been done for all
- buffers in a split btnode page. */
+ if (buffer_nilfs_node(page_buffers(page)) && !PageWriteback(page)) {
+ /*
+ * For b-tree node pages, this function may be called twice
+ * or more because they might be split in a segment.
+ */
+ if (PageDirty(page)) {
+ /*
+ * For pages holding split b-tree node buffers, dirty
+ * flag on the buffers may be cleared discretely.
+ * In that case, the page is once redirtied for
+ * remaining buffers, and it must be cancelled if
+ * all the buffers get cleaned later.
+ */
+ lock_page(page);
+ if (nilfs_page_buffers_clean(page))
+ __nilfs_clear_page_dirty(page);
+ unlock_page(page);
+ }
return;
+ }
__nilfs_end_page_io(page, err);
}
@@ -1940,7 +1940,7 @@ static void nilfs_segctor_abort_write(struct nilfs_sc_info *sci,
}
if (bh->b_page != fs_page) {
nilfs_end_page_io(fs_page, err);
- if (unlikely(fs_page == failed_page))
+ if (fs_page && fs_page == failed_page)
goto done;
fs_page = bh->b_page;
}
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 8e2ec43b18f..151964f0de4 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -416,8 +416,10 @@ int nilfs_attach_checkpoint(struct nilfs_sb_info *sbi, __u64 cno)
if (unlikely(err))
goto failed;
+ down_read(&nilfs->ns_segctor_sem);
err = nilfs_cpfile_get_checkpoint(nilfs->ns_cpfile, cno, 0, &raw_cp,
&bh_cp);
+ up_read(&nilfs->ns_segctor_sem);
if (unlikely(err)) {
if (err == -ENOENT || err == -EINVAL) {
printk(KERN_ERR
diff --git a/fs/nilfs2/the_nilfs.h b/fs/nilfs2/the_nilfs.h
index e8adbffc626..1b9caafb866 100644
--- a/fs/nilfs2/the_nilfs.h
+++ b/fs/nilfs2/the_nilfs.h
@@ -253,7 +253,7 @@ nilfs_detach_writer(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi)
static inline void nilfs_put_sbinfo(struct nilfs_sb_info *sbi)
{
- if (!atomic_dec_and_test(&sbi->s_count))
+ if (atomic_dec_and_test(&sbi->s_count))
kfree(sbi);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-30 23:23:46 +0000