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[79.17.30.229]) by smtp.gmail.com with ESMTPSA id 8-20020a05600c020800b003b4935f04a4sm7726062wmi.5.2022.12.17.10.48.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 17 Dec 2022 10:48:05 -0800 (PST) From: "Fabio M. De Francesco" To: Evgeniy Dushistov , Al Viro , Ira Weiny , linux-kernel@vger.kernel.org, bpf@vger.kernel.org, linux-fsdevel@vger.kernel.org Cc: "Fabio M. De Francesco" Subject: [PATCH v3 2/3] fs/ufs: Change the signature of ufs_get_page() Date: Sat, 17 Dec 2022 19:47:48 +0100 Message-Id: <20221217184749.968-3-fmdefrancesco@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20221217184749.968-1-fmdefrancesco@gmail.com> References: <20221217184749.968-1-fmdefrancesco@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Change the signature of ufs_get_page() in order to prepare this function to the conversion to the use of kmap_local_page(). Change also those call sites which are required to conform its invocations to the new signature. Cc: Ira Weiny Suggested-by: Al Viro Signed-off-by: Fabio M. De Francesco --- fs/ufs/dir.c | 49 +++++++++++++++++++++---------------------------- 1 file changed, 21 insertions(+), 28 deletions(-) diff --git a/fs/ufs/dir.c b/fs/ufs/dir.c index 69f78583c9c1..9fa86614d2d1 100644 --- a/fs/ufs/dir.c +++ b/fs/ufs/dir.c @@ -185,7 +185,7 @@ static bool ufs_check_page(struct page *page) return false; } =20 -static struct page *ufs_get_page(struct inode *dir, unsigned long n) +static void *ufs_get_page(struct inode *dir, unsigned long n, struct page = **p) { struct address_space *mapping =3D dir->i_mapping; struct page *page =3D read_mapping_page(mapping, n, NULL); @@ -195,8 +195,10 @@ static struct page *ufs_get_page(struct inode *dir, un= signed long n) if (!ufs_check_page(page)) goto fail; } + *p =3D page; + return page_address(page); } - return page; + return ERR_CAST(page); =20 fail: ufs_put_page(page); @@ -227,15 +229,12 @@ ufs_next_entry(struct super_block *sb, struct ufs_dir= _entry *p) =20 struct ufs_dir_entry *ufs_dotdot(struct inode *dir, struct page **p) { - struct page *page =3D ufs_get_page(dir, 0); - struct ufs_dir_entry *de =3D NULL; + struct ufs_dir_entry *de =3D ufs_get_page(dir, 0, p); =20 - if (!IS_ERR(page)) { - de =3D ufs_next_entry(dir->i_sb, - (struct ufs_dir_entry *)page_address(page)); - *p =3D page; - } - return de; + if (!IS_ERR(de)) + return ufs_next_entry(dir->i_sb, de); + else + return NULL; } =20 /* @@ -273,11 +272,10 @@ struct ufs_dir_entry *ufs_find_entry(struct inode *di= r, const struct qstr *qstr, start =3D 0; n =3D start; do { - char *kaddr; - page =3D ufs_get_page(dir, n); - if (!IS_ERR(page)) { - kaddr =3D page_address(page); - de =3D (struct ufs_dir_entry *) kaddr; + char *kaddr =3D ufs_get_page(dir, n, &page); + + if (!IS_ERR(kaddr)) { + de =3D (struct ufs_dir_entry *)kaddr; kaddr +=3D ufs_last_byte(dir, n) - reclen; while ((char *) de <=3D kaddr) { if (ufs_match(sb, namelen, name, de)) @@ -328,12 +326,10 @@ int ufs_add_link(struct dentry *dentry, struct inode = *inode) for (n =3D 0; n <=3D npages; n++) { char *dir_end; =20 - page =3D ufs_get_page(dir, n); - err =3D PTR_ERR(page); - if (IS_ERR(page)) - goto out; + kaddr =3D ufs_get_page(dir, n, &page); + if (IS_ERR(kaddr)) + return PTR_ERR(kaddr); lock_page(page); - kaddr =3D page_address(page); dir_end =3D kaddr + ufs_last_byte(dir, n); de =3D (struct ufs_dir_entry *)kaddr; kaddr +=3D PAGE_SIZE - reclen; @@ -395,7 +391,6 @@ int ufs_add_link(struct dentry *dentry, struct inode *i= node) /* OFFSET_CACHE */ out_put: ufs_put_page(page); -out: return err; out_unlock: unlock_page(page); @@ -429,6 +424,7 @@ ufs_readdir(struct file *file, struct dir_context *ctx) unsigned chunk_mask =3D ~(UFS_SB(sb)->s_uspi->s_dirblksize - 1); bool need_revalidate =3D !inode_eq_iversion(inode, file->f_version); unsigned flags =3D UFS_SB(sb)->s_flags; + struct page *page; =20 UFSD("BEGIN\n"); =20 @@ -439,16 +435,14 @@ ufs_readdir(struct file *file, struct dir_context *ct= x) char *kaddr, *limit; struct ufs_dir_entry *de; =20 - struct page *page =3D ufs_get_page(inode, n); - - if (IS_ERR(page)) { + kaddr =3D ufs_get_page(inode, n, &page); + if (IS_ERR(kaddr)) { ufs_error(sb, __func__, "bad page in #%lu", inode->i_ino); ctx->pos +=3D PAGE_SIZE - offset; return -EIO; } - kaddr =3D page_address(page); if (unlikely(need_revalidate)) { if (offset) { offset =3D ufs_validate_entry(sb, kaddr, offset, chunk_mask); @@ -595,12 +589,11 @@ int ufs_empty_dir(struct inode * inode) for (i =3D 0; i < npages; i++) { char *kaddr; struct ufs_dir_entry *de; - page =3D ufs_get_page(inode, i); =20 - if (IS_ERR(page)) + kaddr =3D ufs_get_page(inode, i, &page); + if (IS_ERR(kaddr)) continue; =20 - kaddr =3D page_address(page); de =3D (struct ufs_dir_entry *)kaddr; kaddr +=3D ufs_last_byte(inode, i) - UFS_DIR_REC_LEN(1); =20 --=20 2.39.0