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Diffstat (limited to 'fs/nilfs2/dir.c')
-rw-r--r--fs/nilfs2/dir.c60
1 files changed, 39 insertions, 21 deletions
diff --git a/fs/nilfs2/dir.c b/fs/nilfs2/dir.c
index e506f4f71..908ebbf0a 100644
--- a/fs/nilfs2/dir.c
+++ b/fs/nilfs2/dir.c
@@ -42,6 +42,28 @@
#include "nilfs.h"
#include "page.h"
+static inline unsigned int nilfs_rec_len_from_disk(__le16 dlen)
+{
+ unsigned int len = le16_to_cpu(dlen);
+
+#if (PAGE_SIZE >= 65536)
+ if (len == NILFS_MAX_REC_LEN)
+ return 1 << 16;
+#endif
+ return len;
+}
+
+static inline __le16 nilfs_rec_len_to_disk(unsigned int len)
+{
+#if (PAGE_SIZE >= 65536)
+ if (len == (1 << 16))
+ return cpu_to_le16(NILFS_MAX_REC_LEN);
+
+ BUG_ON(len > (1 << 16));
+#endif
+ return cpu_to_le16(len);
+}
+
/*
* nilfs uses block-sized chunks. Arguably, sector-sized ones would be
* more robust, but we have what we have
@@ -140,10 +162,9 @@ out:
/* Too bad, we had an error */
Ebadsize:
- nilfs_error(sb, "nilfs_check_page",
+ nilfs_error(sb,
"size of directory #%lu is not a multiple of chunk size",
- dir->i_ino
- );
+ dir->i_ino);
goto fail;
Eshort:
error = "rec_len is smaller than minimal";
@@ -157,19 +178,18 @@ Enamelen:
Espan:
error = "directory entry across blocks";
bad_entry:
- nilfs_error(sb, "nilfs_check_page", "bad entry in directory #%lu: %s - "
- "offset=%lu, inode=%lu, rec_len=%d, name_len=%d",
- dir->i_ino, error, (page->index<<PAGE_SHIFT)+offs,
- (unsigned long) le64_to_cpu(p->inode),
+ nilfs_error(sb,
+ "bad entry in directory #%lu: %s - offset=%lu, inode=%lu, rec_len=%d, name_len=%d",
+ dir->i_ino, error, (page->index << PAGE_SHIFT) + offs,
+ (unsigned long)le64_to_cpu(p->inode),
rec_len, p->name_len);
goto fail;
Eend:
p = (struct nilfs_dir_entry *)(kaddr + offs);
- nilfs_error(sb, "nilfs_check_page",
- "entry in directory #%lu spans the page boundary"
- "offset=%lu, inode=%lu",
- dir->i_ino, (page->index<<PAGE_SHIFT)+offs,
- (unsigned long) le64_to_cpu(p->inode));
+ nilfs_error(sb,
+ "entry in directory #%lu spans the page boundary offset=%lu, inode=%lu",
+ dir->i_ino, (page->index << PAGE_SHIFT) + offs,
+ (unsigned long)le64_to_cpu(p->inode));
fail:
SetPageError(page);
return false;
@@ -267,8 +287,7 @@ static int nilfs_readdir(struct file *file, struct dir_context *ctx)
struct page *page = nilfs_get_page(inode, n);
if (IS_ERR(page)) {
- nilfs_error(sb, __func__, "bad page in #%lu",
- inode->i_ino);
+ nilfs_error(sb, "bad page in #%lu", inode->i_ino);
ctx->pos += PAGE_SIZE - offset;
return -EIO;
}
@@ -278,8 +297,7 @@ static int nilfs_readdir(struct file *file, struct dir_context *ctx)
NILFS_DIR_REC_LEN(1);
for ( ; (char *)de <= limit; de = nilfs_next_entry(de)) {
if (de->rec_len == 0) {
- nilfs_error(sb, __func__,
- "zero-length directory entry");
+ nilfs_error(sb, "zero-length directory entry");
nilfs_put_page(page);
return -EIO;
}
@@ -345,7 +363,7 @@ nilfs_find_entry(struct inode *dir, const struct qstr *qstr,
kaddr += nilfs_last_byte(dir, n) - reclen;
while ((char *) de <= kaddr) {
if (de->rec_len == 0) {
- nilfs_error(dir->i_sb, __func__,
+ nilfs_error(dir->i_sb,
"zero-length directory entry");
nilfs_put_page(page);
goto out;
@@ -360,7 +378,7 @@ nilfs_find_entry(struct inode *dir, const struct qstr *qstr,
n = 0;
/* next page is past the blocks we've got */
if (unlikely(n > (dir->i_blocks >> (PAGE_SHIFT - 9)))) {
- nilfs_error(dir->i_sb, __func__,
+ nilfs_error(dir->i_sb,
"dir %lu size %lld exceeds block count %llu",
dir->i_ino, dir->i_size,
(unsigned long long)dir->i_blocks);
@@ -469,7 +487,7 @@ int nilfs_add_link(struct dentry *dentry, struct inode *inode)
goto got_it;
}
if (de->rec_len == 0) {
- nilfs_error(dir->i_sb, __func__,
+ nilfs_error(dir->i_sb,
"zero-length directory entry");
err = -EIO;
goto out_unlock;
@@ -541,7 +559,7 @@ int nilfs_delete_entry(struct nilfs_dir_entry *dir, struct page *page)
while ((char *)de < (char *)dir) {
if (de->rec_len == 0) {
- nilfs_error(inode->i_sb, __func__,
+ nilfs_error(inode->i_sb,
"zero-length directory entry");
err = -EIO;
goto out;
@@ -628,7 +646,7 @@ int nilfs_empty_dir(struct inode *inode)
while ((char *)de <= kaddr) {
if (de->rec_len == 0) {
- nilfs_error(inode->i_sb, __func__,
+ nilfs_error(inode->i_sb,
"zero-length directory entry (kaddr=%p, de=%p)",
kaddr, de);
goto not_empty;