diff options
Diffstat (limited to 'fs/nilfs2/cpfile.c')
| -rw-r--r-- | fs/nilfs2/cpfile.c | 38 |
1 files changed, 21 insertions, 17 deletions
diff --git a/fs/nilfs2/cpfile.c b/fs/nilfs2/cpfile.c index 218b3441850..e90b60dfced 100644 --- a/fs/nilfs2/cpfile.c +++ b/fs/nilfs2/cpfile.c @@ -40,10 +40,7 @@ nilfs_cpfile_checkpoints_per_block(const struct inode *cpfile) static unsigned long nilfs_cpfile_get_blkoff(const struct inode *cpfile, __u64 cno) { - __u64 tcno; - - BUG_ON(cno == 0); /* checkpoint number 0 is invalid */ - tcno = cno + NILFS_MDT(cpfile)->mi_first_entry_offset - 1; + __u64 tcno = cno + NILFS_MDT(cpfile)->mi_first_entry_offset - 1; do_div(tcno, nilfs_cpfile_checkpoints_per_block(cpfile)); return (unsigned long)tcno; } @@ -96,7 +93,7 @@ nilfs_cpfile_block_sub_valid_checkpoints(const struct inode *cpfile, struct nilfs_checkpoint *cp = kaddr + bh_offset(bh); unsigned int count; - BUG_ON(le32_to_cpu(cp->cp_checkpoints_count) < n); + WARN_ON(le32_to_cpu(cp->cp_checkpoints_count) < n); count = le32_to_cpu(cp->cp_checkpoints_count) - n; cp->cp_checkpoints_count = cpu_to_le32(count); return count; @@ -178,6 +175,8 @@ static inline int nilfs_cpfile_delete_checkpoint_block(struct inode *cpfile, * %-ENOMEM - Insufficient amount of memory available. * * %-ENOENT - No such checkpoint. + * + * %-EINVAL - invalid checkpoint. */ int nilfs_cpfile_get_checkpoint(struct inode *cpfile, __u64 cno, @@ -191,8 +190,9 @@ int nilfs_cpfile_get_checkpoint(struct inode *cpfile, void *kaddr; int ret; - BUG_ON(cno < 1 || cno > nilfs_mdt_cno(cpfile) || - (cno < nilfs_mdt_cno(cpfile) && create)); + if (unlikely(cno < 1 || cno > nilfs_mdt_cno(cpfile) || + (cno < nilfs_mdt_cno(cpfile) && create))) + return -EINVAL; down_write(&NILFS_MDT(cpfile)->mi_sem); @@ -288,12 +288,11 @@ int nilfs_cpfile_delete_checkpoints(struct inode *cpfile, unsigned long tnicps; int ret, ncps, nicps, count, i; - if ((start == 0) || (start > end)) { - printk(KERN_CRIT "%s: start = %llu, end = %llu\n", - __func__, - (unsigned long long)start, - (unsigned long long)end); - BUG(); + if (unlikely(start == 0 || start > end)) { + printk(KERN_ERR "%s: invalid range of checkpoint numbers: " + "[%llu, %llu)\n", __func__, + (unsigned long long)start, (unsigned long long)end); + return -EINVAL; } /* cannot delete the latest checkpoint */ @@ -323,7 +322,7 @@ int nilfs_cpfile_delete_checkpoints(struct inode *cpfile, cpfile, cno, cp_bh, kaddr); nicps = 0; for (i = 0; i < ncps; i++, cp = (void *)cp + cpsz) { - BUG_ON(nilfs_checkpoint_snapshot(cp)); + WARN_ON(nilfs_checkpoint_snapshot(cp)); if (!nilfs_checkpoint_invalid(cp)) { nilfs_checkpoint_set_invalid(cp); nicps++; @@ -393,6 +392,8 @@ static ssize_t nilfs_cpfile_do_get_cpinfo(struct inode *cpfile, __u64 *cnop, int n, ret; int ncps, i; + if (cno == 0) + return -ENOENT; /* checkpoint number 0 is invalid */ down_read(&NILFS_MDT(cpfile)->mi_sem); for (n = 0; cno < cur_cno && n < nci; cno += ncps) { @@ -532,9 +533,6 @@ int nilfs_cpfile_delete_checkpoint(struct inode *cpfile, __u64 cno) ssize_t nci; int ret; - /* checkpoint number 0 is invalid */ - if (cno == 0) - return -ENOENT; nci = nilfs_cpfile_do_get_cpinfo(cpfile, &tcno, &ci, 1); if (nci < 0) return nci; @@ -582,6 +580,8 @@ static int nilfs_cpfile_set_snapshot(struct inode *cpfile, __u64 cno) void *kaddr; int ret; + if (cno == 0) + return -ENOENT; /* checkpoint number 0 is invalid */ down_write(&NILFS_MDT(cpfile)->mi_sem); ret = nilfs_cpfile_get_checkpoint_block(cpfile, cno, 0, &cp_bh); @@ -698,6 +698,8 @@ static int nilfs_cpfile_clear_snapshot(struct inode *cpfile, __u64 cno) void *kaddr; int ret; + if (cno == 0) + return -ENOENT; /* checkpoint number 0 is invalid */ down_write(&NILFS_MDT(cpfile)->mi_sem); ret = nilfs_cpfile_get_checkpoint_block(cpfile, cno, 0, &cp_bh); @@ -813,6 +815,8 @@ int nilfs_cpfile_is_snapshot(struct inode *cpfile, __u64 cno) void *kaddr; int ret; + if (cno == 0) + return -ENOENT; /* checkpoint number 0 is invalid */ down_read(&NILFS_MDT(cpfile)->mi_sem); ret = nilfs_cpfile_get_checkpoint_block(cpfile, cno, 0, &bh); |