| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1413782379-11758-7-git-send-email-jaegeuk@kernel.org>
Date: Sun, 19 Oct 2014 22:19:35 -0700
From: Jaegeuk Kim <jaegeuk@...nel.org>
To: linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
linux-f2fs-devel@...ts.sourceforge.net
Cc: Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH 07/11] f2fs: reuse core function in f2fs_readdir for inline_dentry
This patch introduces a core function, f2fs_fill_dentries, to remove
redundant code in f2fs_readdir and f2fs_read_inline_dir.
Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
fs/f2fs/dir.c | 64 +++++++++++++++++++++++++++++++++-----------------------
fs/f2fs/f2fs.h | 3 +++
fs/f2fs/inline.c | 39 +++++++---------------------------
3 files changed, 48 insertions(+), 58 deletions(-)
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index 334e227..721d061 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -705,23 +705,50 @@ bool f2fs_empty_dir(struct inode *dir)
return true;
}
+bool f2fs_fill_dentries(struct dir_context *ctx,
+ const void *bitmap, struct f2fs_dir_entry *dentry,
+ __u8 (*filenames)[F2FS_SLOT_LEN], int max,
+ unsigned int start_pos)
+{
+ unsigned char d_type = DT_UNKNOWN;
+ unsigned int bit_pos;
+ struct f2fs_dir_entry *de = NULL;
+
+ bit_pos = ((unsigned long)ctx->pos % max);
+
+ while (bit_pos < max) {
+ bit_pos = find_next_bit_le(bitmap, max, bit_pos);
+ if (bit_pos >= max)
+ break;
+
+ de = &dentry[bit_pos];
+ if (de->file_type < F2FS_FT_MAX)
+ d_type = f2fs_filetype_table[de->file_type];
+ else
+ d_type = DT_UNKNOWN;
+ if (!dir_emit(ctx, filenames[bit_pos],
+ le16_to_cpu(de->name_len),
+ le32_to_cpu(de->ino), d_type))
+ return true;
+
+ bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
+ ctx->pos = start_pos + bit_pos;
+ }
+ return false;
+}
+
static int f2fs_readdir(struct file *file, struct dir_context *ctx)
{
struct inode *inode = file_inode(file);
unsigned long npages = dir_blocks(inode);
- unsigned int bit_pos = 0;
struct f2fs_dentry_block *dentry_blk = NULL;
- struct f2fs_dir_entry *de = NULL;
struct page *dentry_page = NULL;
struct file_ra_state *ra = &file->f_ra;
unsigned int n = ((unsigned long)ctx->pos / NR_DENTRY_IN_BLOCK);
- unsigned char d_type = DT_UNKNOWN;
if (f2fs_has_inline_dentry(inode))
return f2fs_read_inline_dir(file, ctx);
- bit_pos = ((unsigned long)ctx->pos % NR_DENTRY_IN_BLOCK);
-
/* readahead for multi pages of dir */
if (npages - n > 1 && !ra_has_index(ra, n))
page_cache_sync_readahead(inode->i_mapping, ra, file, n,
@@ -733,28 +760,13 @@ static int f2fs_readdir(struct file *file, struct dir_context *ctx)
continue;
dentry_blk = kmap(dentry_page);
- while (bit_pos < NR_DENTRY_IN_BLOCK) {
- bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
- NR_DENTRY_IN_BLOCK,
- bit_pos);
- if (bit_pos >= NR_DENTRY_IN_BLOCK)
- break;
-
- de = &dentry_blk->dentry[bit_pos];
- if (de->file_type < F2FS_FT_MAX)
- d_type = f2fs_filetype_table[de->file_type];
- else
- d_type = DT_UNKNOWN;
- if (!dir_emit(ctx,
- dentry_blk->filename[bit_pos],
- le16_to_cpu(de->name_len),
- le32_to_cpu(de->ino), d_type))
- goto stop;
- bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
- ctx->pos = n * NR_DENTRY_IN_BLOCK + bit_pos;
- }
- bit_pos = 0;
+ if (f2fs_fill_dentries(ctx,
+ &dentry_blk->dentry_bitmap, dentry_blk->dentry,
+ dentry_blk->filename,
+ NR_DENTRY_IN_BLOCK, n * NR_DENTRY_IN_BLOCK))
+ goto stop;
+
ctx->pos = (n + 1) * NR_DENTRY_IN_BLOCK;
kunmap(dentry_page);
f2fs_put_page(dentry_page, 1);
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 9c4c8d1..3b0f490 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1247,6 +1247,9 @@ extern unsigned char f2fs_filetype_table[F2FS_FT_MAX];
void set_de_type(struct f2fs_dir_entry *, struct inode *);
struct f2fs_dir_entry *find_target_dentry(struct qstr *, int *, const void *,
struct f2fs_dir_entry *, __u8 (*)[F2FS_SLOT_LEN]);
+bool f2fs_fill_dentries(struct dir_context *,
+ const void *, struct f2fs_dir_entry *,
+ __u8 (*)[F2FS_SLOT_LEN], int, unsigned int);
struct page *init_inode_metadata(struct inode *, struct inode *,
const struct qstr *, struct page *);
void update_parent_metadata(struct inode *, struct inode *, unsigned int);
diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c
index 633d5e8..403c8f7 100644
--- a/fs/f2fs/inline.c
+++ b/fs/f2fs/inline.c
@@ -519,49 +519,24 @@ bool f2fs_empty_inline_dir(struct inode *dir)
int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx)
{
struct inode *inode = file_inode(file);
- struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
- unsigned int bit_pos = 0;
struct f2fs_inline_dentry *inline_dentry = NULL;
- struct f2fs_dir_entry *de = NULL;
struct page *ipage = NULL;
- unsigned char d_type = DT_UNKNOWN;
if (ctx->pos == NR_INLINE_DENTRY)
return 0;
- ipage = get_node_page(sbi, inode->i_ino);
+ ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
if (IS_ERR(ipage))
return PTR_ERR(ipage);
- bit_pos = ((unsigned long)ctx->pos % NR_INLINE_DENTRY);
-
inline_dentry = inline_data_addr(ipage);
- while (bit_pos < NR_INLINE_DENTRY) {
- bit_pos = find_next_bit_le(&inline_dentry->dentry_bitmap,
- NR_INLINE_DENTRY,
- bit_pos);
- if (bit_pos >= NR_INLINE_DENTRY)
- break;
-
- de = &inline_dentry->dentry[bit_pos];
- if (de->file_type < F2FS_FT_MAX)
- d_type = f2fs_filetype_table[de->file_type];
- else
- d_type = DT_UNKNOWN;
-
- if (!dir_emit(ctx,
- inline_dentry->filename[bit_pos],
- le16_to_cpu(de->name_len),
- le32_to_cpu(de->ino), d_type))
- goto out;
-
- bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
- ctx->pos = bit_pos;
- }
- ctx->pos = NR_INLINE_DENTRY;
-out:
- f2fs_put_page(ipage, 1);
+ if (!f2fs_fill_dentries(ctx, &inline_dentry->dentry_bitmap,
+ inline_dentry->dentry,
+ inline_dentry->filename,
+ NR_INLINE_DENTRY, 0))
+ ctx->pos = NR_INLINE_DENTRY;
+ f2fs_put_page(ipage, 1);
return 0;
}
--
2.1.1
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists