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Diffstat (limited to 'fs/nilfs2/cpfile.c')
-rw-r--r--fs/nilfs2/cpfile.c24
1 files changed, 14 insertions, 10 deletions
diff --git a/fs/nilfs2/cpfile.c b/fs/nilfs2/cpfile.c
index 82462ac..a4c9550 100644
--- a/fs/nilfs2/cpfile.c
+++ b/fs/nilfs2/cpfile.c
@@ -422,20 +422,20 @@ static ssize_t nilfs_cpfile_do_get_cpinfo(struct inode *cpfile, __u64 cno,
return ret;
}
-static ssize_t nilfs_cpfile_do_get_ssinfo(struct inode *cpfile, __u64 cno,
+static ssize_t nilfs_cpfile_do_get_ssinfo(struct inode *cpfile, __u64 *cnop,
struct nilfs_cpinfo *ci, size_t nci)
{
struct buffer_head *bh;
struct nilfs_cpfile_header *header;
struct nilfs_checkpoint *cp;
- __u64 curr, next;
+ __u64 curr = *cnop, next;
unsigned long curr_blkoff, next_blkoff;
void *kaddr;
int n, ret;
down_read(&NILFS_MDT(cpfile)->mi_sem);
- if (cno == 0) {
+ if (curr == 0) {
ret = nilfs_cpfile_get_header_block(cpfile, &bh);
if (ret < 0)
goto out;
@@ -448,8 +448,11 @@ static ssize_t nilfs_cpfile_do_get_ssinfo(struct inode *cpfile, __u64 cno,
ret = 0;
goto out;
}
- } else
- curr = cno;
+ } else if (unlikely(curr == ~(__u64)0)) {
+ ret = 0;
+ goto out;
+ }
+
curr_blkoff = nilfs_cpfile_get_blkoff(cpfile, curr);
ret = nilfs_cpfile_get_checkpoint_block(cpfile, curr, 0, &bh);
if (ret < 0)
@@ -461,7 +464,7 @@ static ssize_t nilfs_cpfile_do_get_ssinfo(struct inode *cpfile, __u64 cno,
nilfs_cpfile_checkpoint_to_cpinfo(cpfile, cp, &ci[n]);
next = le64_to_cpu(cp->cp_snapshot_list.ssl_next);
if (next == 0) {
- curr = next;
+ curr = ~(__u64)0; /* Terminator */
n++;
break;
}
@@ -480,6 +483,7 @@ static ssize_t nilfs_cpfile_do_get_ssinfo(struct inode *cpfile, __u64 cno,
}
kunmap_atomic(kaddr, KM_USER0);
brelse(bh);
+ *cnop = curr;
ret = n;
out:
@@ -494,15 +498,15 @@ static ssize_t nilfs_cpfile_do_get_ssinfo(struct inode *cpfile, __u64 cno,
* @ci:
* @nci:
*/
-ssize_t nilfs_cpfile_get_cpinfo(struct inode *cpfile,
- __u64 cno, int mode,
+
+ssize_t nilfs_cpfile_get_cpinfo(struct inode *cpfile, __u64 *cnop, int mode,
struct nilfs_cpinfo *ci, size_t nci)
{
switch (mode) {
case NILFS_CHECKPOINT:
- return nilfs_cpfile_do_get_cpinfo(cpfile, cno, ci, nci);
+ return nilfs_cpfile_do_get_cpinfo(cpfile, *cnop, ci, nci);
case NILFS_SNAPSHOT:
- return nilfs_cpfile_do_get_ssinfo(cpfile, cno, ci, nci);
+ return nilfs_cpfile_do_get_ssinfo(cpfile, cnop, ci, nci);
default:
return -EINVAL;
}
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