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| author | Eric Biggers <ebiggers@google.com> | 2016-09-16 00:25:55 +0300 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2016-09-16 00:25:55 +0300 |
| commit | ef1eb3aa50930f026135085cd160b1212cdfe817 (patch) | |
| tree | 12ed99fd9e7dc658b0e1bb0bc78e2ad0bb887dca /fs/f2fs | |
| parent | 53fd7550ec40571e26f730a0d3fc0a5dd93ecda2 (diff) | |
| download | linux-ef1eb3aa50930f026135085cd160b1212cdfe817.tar.xz | |
fscrypto: make filename crypto functions return 0 on success
Several filename crypto functions: fname_decrypt(),
fscrypt_fname_disk_to_usr(), and fscrypt_fname_usr_to_disk(), returned
the output length on success or -errno on failure. However, the output
length was redundant with the value written to 'oname->len'. It is also
potentially error-prone to make callers have to check for '< 0' instead
of '!= 0'.
Therefore, make these functions return 0 instead of a length, and make
the callers who cared about the return value being a length use
'oname->len' instead. For consistency also make other callers check for
a nonzero result rather than a negative result.
This change also fixes the inconsistency of fname_encrypt() actually
already returning 0 on success, not a length like the other filename
crypto functions and as documented in its function comment.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Acked-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/dir.c | 6 | ||||
| -rw-r--r-- | fs/f2fs/namei.c | 6 |
2 files changed, 6 insertions, 6 deletions
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c index 9054aeac8015..8716943335b1 100644 --- a/fs/f2fs/dir.c +++ b/fs/f2fs/dir.c @@ -786,7 +786,7 @@ bool f2fs_fill_dentries(struct dir_context *ctx, struct f2fs_dentry_ptr *d, if (f2fs_encrypted_inode(d->inode)) { int save_len = fstr->len; - int ret; + int err; de_name.name = f2fs_kmalloc(de_name.len, GFP_NOFS); if (!de_name.name) @@ -794,11 +794,11 @@ bool f2fs_fill_dentries(struct dir_context *ctx, struct f2fs_dentry_ptr *d, memcpy(de_name.name, d->filename[bit_pos], de_name.len); - ret = fscrypt_fname_disk_to_usr(d->inode, + err = fscrypt_fname_disk_to_usr(d->inode, (u32)de->hash_code, 0, &de_name, fstr); kfree(de_name.name); - if (ret < 0) + if (err) return true; de_name = *fstr; diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c index 73fa356f8fbb..afd56332d34c 100644 --- a/fs/f2fs/namei.c +++ b/fs/f2fs/namei.c @@ -449,7 +449,7 @@ static int f2fs_symlink(struct inode *dir, struct dentry *dentry, ostr.name = sd->encrypted_path; ostr.len = disk_link.len; err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr); - if (err < 0) + if (err) goto err_out; sd->len = cpu_to_le16(ostr.len); @@ -1048,7 +1048,7 @@ static const char *f2fs_encrypted_get_link(struct dentry *dentry, goto errout; res = fscrypt_fname_disk_to_usr(inode, 0, 0, &cstr, &pstr); - if (res < 0) + if (res) goto errout; /* this is broken symlink case */ @@ -1060,7 +1060,7 @@ static const char *f2fs_encrypted_get_link(struct dentry *dentry, paddr = pstr.name; /* Null-terminate the name */ - paddr[res] = '\0'; + paddr[pstr.len] = '\0'; put_page(cpage); set_delayed_call(done, kfree_link, paddr); |