generic_write_checks(): drop isblk argument

all remaining callers are passing 0; some just obscure that fact.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

14 files changed, 36 insertions, 60 deletions

diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index d7fcb775311e..b5b020ace1b3 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -409,7 +409,7 @@ v9fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
         size_t count = iov_iter_count(from);
         int err = 0;
 
-        retval = generic_write_checks(file, &origin, &count, 0);
+        retval = generic_write_checks(file, &origin, &count);
         if (retval)
                 return retval;
 
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index cdc801c85105..691a84a81e09 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1747,7 +1747,7 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
         mutex_lock(&inode->i_mutex);
 
         current->backing_dev_info = inode_to_bdi(inode);
-        err = generic_write_checks(file, &pos, &count, S_ISBLK(inode->i_mode));
+        err = generic_write_checks(file, &pos, &count);
         if (err) {
                 mutex_unlock(&inode->i_mutex);
                 goto out;
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 56237ea5fc22..761841903160 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -953,7 +953,7 @@ static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from)
         /* We can write back this queue in page reclaim */
         current->backing_dev_info = inode_to_bdi(inode);
 
-        err = generic_write_checks(file, &pos, &count, S_ISBLK(inode->i_mode));
+        err = generic_write_checks(file, &pos, &count);
         if (err)
                 goto out;
 
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 3c5c9bc5cbaf..4202e74b2db5 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -2580,7 +2580,7 @@ ssize_t cifs_user_writev(struct kiocb *iocb, struct iov_iter *from)
          */
 
         len = iov_iter_count(from);
-        rc = generic_write_checks(file, &iocb->ki_pos, &len, 0);
+        rc = generic_write_checks(file, &iocb->ki_pos, &len);
         if (rc)
                 return rc;
 
@@ -2684,7 +2684,7 @@ cifs_writev(struct kiocb *iocb, struct iov_iter *from)
         mutex_lock(&inode->i_mutex);
 
         count = iov_iter_count(from);
-        rc = generic_write_checks(file, &iocb->ki_pos, &count, 0);
+        rc = generic_write_checks(file, &iocb->ki_pos, &count);
         if (rc)
                 goto out;
 
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index f7cca423dded..1f0afc181b7b 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -171,7 +171,7 @@ ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
                 }
         }
 
-        ret = generic_write_checks(file, &iocb->ki_pos, &length, 0);
+        ret = generic_write_checks(file, &iocb->ki_pos, &length);
         if (ret)
                 goto out;
 
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 3d355e946991..4c04a8144a75 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1167,7 +1167,7 @@ static ssize_t fuse_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
         /* We can write back this queue in page reclaim */
         current->backing_dev_info = inode_to_bdi(inode);
 
-        err = generic_write_checks(file, &pos, &count, S_ISBLK(inode->i_mode));
+        err = generic_write_checks(file, &pos, &count);
         if (err)
                 goto out;
 
@@ -1420,7 +1420,7 @@ static ssize_t fuse_direct_write_iter(struct kiocb *iocb, struct iov_iter *from)
 
         /* Don't allow parallel writes to the same file */
         mutex_lock(&inode->i_mutex);
-        res = generic_write_checks(file, &iocb->ki_pos, &count, 0);
+        res = generic_write_checks(file, &iocb->ki_pos, &count);
         if (!res) {
                 iov_iter_truncate(from, count);
                 res = fuse_direct_io(&io, from, &iocb->ki_pos, FUSE_DIO_WRITE);
@@ -2841,7 +2841,7 @@ fuse_direct_IO(struct kiocb *iocb, struct iov_iter *iter, loff_t offset)
                 io->done = &wait;
 
         if (iov_iter_rw(iter) == WRITE) {
-                ret = generic_write_checks(file, &pos, &count, 0);
+                ret = generic_write_checks(file, &pos, &count);
                 if (!ret) {
                         iov_iter_truncate(iter, count);
                         ret = fuse_direct_io(io, iter, &pos, FUSE_DIO_WRITE);
diff --git a/fs/ncpfs/file.c b/fs/ncpfs/file.c
index 479bf8db264e..ab6363b16556 100644
--- a/fs/ncpfs/file.c
+++ b/fs/ncpfs/file.c
@@ -177,7 +177,7 @@ ncp_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
         void *bouncebuffer;
 
         ncp_dbg(1, "enter %pD2\n", file);
-        errno = generic_write_checks(file, &pos, &count, 0);
+        errno = generic_write_checks(file, &pos, &count);
         if (errno)
                 return errno;
         iov_iter_truncate(from, count);
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 06503bc604e1..5ddd77acb3f7 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -977,7 +977,7 @@ ssize_t nfs_file_direct_write(struct kiocb *iocb, struct iov_iter *iter,
         dfprintk(FILE, "NFS: direct write(%pD2, %zd@%Ld)\n",
                 file, count, (long long) pos);
 
-        result = generic_write_checks(file, &pos, &count, 0);
+        result = generic_write_checks(file, &pos, &count);
         if (result)
                 goto out;
 
diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
index 77087d5ad458..cec4ec3c1ede 100644
--- a/fs/ntfs/file.c
+++ b/fs/ntfs/file.c
@@ -345,7 +345,7 @@ static ssize_t ntfs_prepare_file_for_write(struct kiocb *iocb,
                         "0x%llx, count 0x%zx.", vi->i_ino,
                         (unsigned)le32_to_cpu(ni->type),
                         (unsigned long long)iocb->ki_pos, count);
-        err = generic_write_checks(file, &iocb->ki_pos, &count, S_ISBLK(vi->i_mode));
+        err = generic_write_checks(file, &iocb->ki_pos, &count);
         if (unlikely(err))
                 goto out;
         iov_iter_truncate(from, count);
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 0a6ec7e6efd8..1c11314946cb 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -2374,8 +2374,7 @@ relock:
         /* communicate with ocfs2_dio_end_io */
         ocfs2_iocb_set_rw_locked(iocb, rw_level);
 
-        ret = generic_write_checks(file, ppos, &count,
-                                   S_ISBLK(inode->i_mode));
+        ret = generic_write_checks(file, ppos, &count);
         if (ret)
                 goto out_dio;
 
diff --git a/fs/udf/file.c b/fs/udf/file.c
index 35e81ed99405..6834509a7e5a 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -151,7 +151,7 @@ static ssize_t udf_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
         } else
                 up_write(&iinfo->i_data_sem);
 
-        retval = generic_write_checks(file, &iocb->ki_pos, &count, 0);
+        retval = generic_write_checks(file, &iocb->ki_pos, &count);
         if (retval)
                 goto out;
 
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 44856c3b9617..43c0e6686c47 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -554,7 +554,7 @@ xfs_file_aio_write_checks(
         int                     error = 0;
 
 restart:
-        error = generic_write_checks(file, pos, count, S_ISBLK(inode->i_mode));
+        error = generic_write_checks(file, pos, count);
         if (error)
                 return error;
 
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 72e3759de8c3..492948ea4c9b 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2566,7 +2566,7 @@ extern int sb_min_blocksize(struct super_block *, int);
 
 extern int generic_file_mmap(struct file *, struct vm_area_struct *);
 extern int generic_file_readonly_mmap(struct file *, struct vm_area_struct *);
-int generic_write_checks(struct file *file, loff_t *pos, size_t *count, int isblk);
+int generic_write_checks(struct file *file, loff_t *pos, size_t *count);
 extern ssize_t generic_file_read_iter(struct kiocb *, struct iov_iter *);
 extern ssize_t __generic_file_write_iter(struct kiocb *, struct iov_iter *);
 extern ssize_t generic_file_write_iter(struct kiocb *, struct iov_iter *);
diff --git a/mm/filemap.c b/mm/filemap.c
index a794a7f98743..dfc573c6ec25 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2260,7 +2260,7 @@ EXPORT_SYMBOL(read_cache_page_gfp);
  * Returns appropriate error code that caller should return or
  * zero in case that write should be allowed.
  */
-inline int generic_write_checks(struct file *file, loff_t *pos, size_t *count, int isblk)
+inline int generic_write_checks(struct file *file, loff_t *pos, size_t *count)
 {
         struct inode *inode = file->f_mapping->host;
         unsigned long limit = rlimit(RLIMIT_FSIZE);
@@ -2268,20 +2268,17 @@ inline int generic_write_checks(struct file *file, loff_t *pos, size_t *count, i
         if (unlikely(*pos < 0))
                 return -EINVAL;
 
-        if (!isblk) {
-                /* FIXME: this is for backwards compatibility with 2.4 */
-                if (file->f_flags & O_APPEND)
-                        *pos = i_size_read(inode);
+        /* FIXME: this is for backwards compatibility with 2.4 */
+        if (file->f_flags & O_APPEND)
+                *pos = i_size_read(inode);
 
-                if (limit != RLIM_INFINITY) {
-                        if (*pos >= limit) {
-                                send_sig(SIGXFSZ, current, 0);
-                                return -EFBIG;
-                        }
-                        if (*count > limit - (typeof(limit))*pos) {
-                                *count = limit - (typeof(limit))*pos;
-                        }
+        if (limit != RLIM_INFINITY) {
+                if (*pos >= limit) {
+                        send_sig(SIGXFSZ, current, 0);
+                        return -EFBIG;
                 }
+                if (*count > limit - (typeof(limit))*pos)
+                        *count = limit - (typeof(limit))*pos;
         }
 
         /*
@@ -2289,12 +2286,10 @@ inline int generic_write_checks(struct file *file, loff_t *pos, size_t *count, i
          */
         if (unlikely(*pos + *count > MAX_NON_LFS &&
                                 !(file->f_flags & O_LARGEFILE))) {
-                if (*pos >= MAX_NON_LFS) {
+                if (*pos >= MAX_NON_LFS)
                         return -EFBIG;
-                }
-                if (*count > MAX_NON_LFS - (unsigned long)*pos) {
+                if (*count > MAX_NON_LFS - (unsigned long)*pos)
                         *count = MAX_NON_LFS - (unsigned long)*pos;
-                }
         }
 
         /*
@@ -2304,33 +2299,15 @@ inline int generic_write_checks(struct file *file, loff_t *pos, size_t *count, i
          * exceeded without writing data we send a signal and return EFBIG.
          * Linus frestrict idea will clean these up nicely..
          */
-        if (likely(!isblk)) {
-                if (unlikely(*pos >= inode->i_sb->s_maxbytes)) {
-                        if (*count || *pos > inode->i_sb->s_maxbytes) {
-                                return -EFBIG;
-                        }
-                        /* zero-length writes at ->s_maxbytes are OK */
-                }
-
-                if (unlikely(*pos + *count > inode->i_sb->s_maxbytes))
-                        *count = inode->i_sb->s_maxbytes - *pos;
-        } else {
-#ifdef CONFIG_BLOCK
-                loff_t isize;
-                if (bdev_read_only(I_BDEV(inode)))
-                        return -EPERM;
-                isize = i_size_read(inode);
-                if (*pos >= isize) {
-                        if (*count || *pos > isize)
-                                return -ENOSPC;
+        if (unlikely(*pos >= inode->i_sb->s_maxbytes)) {
+                if (*count || *pos > inode->i_sb->s_maxbytes) {
+                        return -EFBIG;
                 }
-
-                if (*pos + *count > isize)
-                        *count = isize - *pos;
-#else
-                return -EPERM;
-#endif
+                /* zero-length writes at ->s_maxbytes are OK */
         }
+
+        if (unlikely(*pos + *count > inode->i_sb->s_maxbytes))
+                *count = inode->i_sb->s_maxbytes - *pos;
         return 0;
 }
 EXPORT_SYMBOL(generic_write_checks);
@@ -2644,7 +2621,7 @@ ssize_t generic_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
         size_t count = iov_iter_count(from);
 
         mutex_lock(&inode->i_mutex);
-        ret = generic_write_checks(file, &iocb->ki_pos, &count, 0);
+        ret = generic_write_checks(file, &iocb->ki_pos, &count);
         if (!ret && count) {
                 iov_iter_truncate(from, count);
                 ret = __generic_file_write_iter(iocb, from);