Re: [PATCH v2] f2fs: fix readdir incorrectness
Chang log from v1: o fix another scenario >From 2ee3c8144187ab230d0f47f9b95e5406af87ada8 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Fri, 5 Jul 2013 14:06:04 +0900 Subject: [PATCH] f2fs: fix readdir incorrectness Cc: linux-fsde...@vger.kernel.org, linux-kernel@vger.kernel.org, linux-f2fs-de...@lists.sourceforge.net In the previous Al Viro's readdir patch set, there occurs a bug when running xfstest: 006 as follows. [Error output] alpha size = 4, name length = 6, total files = 4096, nproc=1 1023 files created rm: cannot remove `/mnt/f2fs/permname.15150/a': Directory not empty [Correct output] alpha size = 4, name length = 6, total files = 4096, nproc=1 4097 files created This bug is due to the misupdate of directory position in ctx. So, this patch fixes this. CC: Al Viro Signed-off-by: Jaegeuk Kim --- fs/f2fs/dir.c | 16 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c index 9d1cd42..dffc4f7 100644 --- a/fs/f2fs/dir.c +++ b/fs/f2fs/dir.c @@ -634,19 +634,19 @@ static int f2fs_readdir(struct file *file, struct dir_context *ctx) if (bit_pos >= NR_DENTRY_IN_BLOCK) break; - ctx->pos += bit_pos - start_bit_pos; de = _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 success; - slots = GET_DENTRY_SLOTS(le16_to_cpu(de->name_len)); - bit_pos += slots; + 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_ops; } bit_pos = 0; ctx->pos = (n + 1) * NR_DENTRY_IN_BLOCK; @@ -654,7 +654,7 @@ static int f2fs_readdir(struct file *file, struct dir_context *ctx) f2fs_put_page(dentry_page, 1); dentry_page = NULL; } -success: +stop: if (dentry_page && !IS_ERR(dentry_page)) { kunmap(dentry_page); f2fs_put_page(dentry_page, 1); -- 1.8.3.1.437.g0dbd812 -- Jaegeuk Kim Samsung -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH v2] f2fs: fix readdir incorrectness
Chang log from v1: o fix another scenario From 2ee3c8144187ab230d0f47f9b95e5406af87ada8 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim jaegeuk@samsung.com Date: Fri, 5 Jul 2013 14:06:04 +0900 Subject: [PATCH] f2fs: fix readdir incorrectness Cc: linux-fsde...@vger.kernel.org, linux-kernel@vger.kernel.org, linux-f2fs-de...@lists.sourceforge.net In the previous Al Viro's readdir patch set, there occurs a bug when running xfstest: 006 as follows. [Error output] alpha size = 4, name length = 6, total files = 4096, nproc=1 1023 files created rm: cannot remove `/mnt/f2fs/permname.15150/a': Directory not empty [Correct output] alpha size = 4, name length = 6, total files = 4096, nproc=1 4097 files created This bug is due to the misupdate of directory position in ctx. So, this patch fixes this. CC: Al Viro v...@zeniv.linux.org.uk Signed-off-by: Jaegeuk Kim jaegeuk@samsung.com --- fs/f2fs/dir.c | 16 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c index 9d1cd42..dffc4f7 100644 --- a/fs/f2fs/dir.c +++ b/fs/f2fs/dir.c @@ -634,19 +634,19 @@ static int f2fs_readdir(struct file *file, struct dir_context *ctx) if (bit_pos = NR_DENTRY_IN_BLOCK) break; - ctx-pos += bit_pos - start_bit_pos; 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 success; - slots = GET_DENTRY_SLOTS(le16_to_cpu(de-name_len)); - bit_pos += slots; + 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_ops; } bit_pos = 0; ctx-pos = (n + 1) * NR_DENTRY_IN_BLOCK; @@ -654,7 +654,7 @@ static int f2fs_readdir(struct file *file, struct dir_context *ctx) f2fs_put_page(dentry_page, 1); dentry_page = NULL; } -success: +stop: if (dentry_page !IS_ERR(dentry_page)) { kunmap(dentry_page); f2fs_put_page(dentry_page, 1); -- 1.8.3.1.437.g0dbd812 -- Jaegeuk Kim Samsung -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/