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| author | Hongnan Li <hongnan.li@linux.alibaba.com> | 2022-07-22 16:27:32 +0800 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@linux.alibaba.com> | 2022-07-31 22:26:29 +0800 |
| commit | ecce9212d0fd7a2d4a4998f0c4623a66887e14c8 (patch) | |
| tree | f99c34b9de7778f6fdb7a50c157191816822261c /fs/erofs/dir.c | |
| parent | cc2a171372c68ee64916eb65a962b3aba9ea56ad (diff) | |
| download | linux-ecce9212d0fd7a2d4a4998f0c4623a66887e14c8.tar.bz2 | |
erofs: update ctx->pos for every emitted dirent
erofs_readdir update ctx->pos after filling a batch of dentries
and it may cause dir/files duplication for NFS readdirplus which
depends on ctx->pos to fill dir correctly. So update ctx->pos for
every emitted dirent in erofs_fill_dentries to fix it.
Also fix the update of ctx->pos when the initial file position has
exceeded nameoff.
Fixes: 3e917cc305c6 ("erofs: make filesystem exportable")
Signed-off-by: Hongnan Li <hongnan.li@linux.alibaba.com>
Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Link: https://lore.kernel.org/r/20220722082732.30935-1-jefflexu@linux.alibaba.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Diffstat (limited to 'fs/erofs/dir.c')
| -rw-r--r-- | fs/erofs/dir.c | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/fs/erofs/dir.c b/fs/erofs/dir.c index 723f5223a4fa..ecf28f66b97d 100644 --- a/fs/erofs/dir.c +++ b/fs/erofs/dir.c @@ -22,10 +22,9 @@ static void debug_one_dentry(unsigned char d_type, const char *de_name, } static int erofs_fill_dentries(struct inode *dir, struct dir_context *ctx, - void *dentry_blk, unsigned int *ofs, + void *dentry_blk, struct erofs_dirent *de, unsigned int nameoff, unsigned int maxsize) { - struct erofs_dirent *de = dentry_blk + *ofs; const struct erofs_dirent *end = dentry_blk + nameoff; while (de < end) { @@ -59,9 +58,8 @@ static int erofs_fill_dentries(struct inode *dir, struct dir_context *ctx, /* stopped by some reason */ return 1; ++de; - *ofs += sizeof(struct erofs_dirent); + ctx->pos += sizeof(struct erofs_dirent); } - *ofs = maxsize; return 0; } @@ -95,7 +93,7 @@ static int erofs_readdir(struct file *f, struct dir_context *ctx) "invalid de[0].nameoff %u @ nid %llu", nameoff, EROFS_I(dir)->nid); err = -EFSCORRUPTED; - goto skip_this; + break; } maxsize = min_t(unsigned int, @@ -106,17 +104,17 @@ static int erofs_readdir(struct file *f, struct dir_context *ctx) initial = false; ofs = roundup(ofs, sizeof(struct erofs_dirent)); + ctx->pos = blknr_to_addr(i) + ofs; if (ofs >= nameoff) goto skip_this; } - err = erofs_fill_dentries(dir, ctx, de, &ofs, + err = erofs_fill_dentries(dir, ctx, de, (void *)de + ofs, nameoff, maxsize); -skip_this: - ctx->pos = blknr_to_addr(i) + ofs; - if (err) break; +skip_this: + ctx->pos = blknr_to_addr(i) + maxsize; ++i; ofs = 0; } |