net: Copy inner L3 and L4 headers as unaligned on GRE TEB

[uclinux-h8/linux.git] / fs / fuse / file.c

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 570ca40..b03d253 100644 (file)
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -207,7 +207,7 @@ int fuse_open_common(struct inode *inode, struct file *file, bool isdir)
                return err;
 
        if (lock_inode)
-               mutex_lock(&inode->i_mutex);
+               inode_lock(inode);
 
        err = fuse_do_open(fc, get_node_id(inode), file, isdir);
 
@@ -215,7 +215,7 @@ int fuse_open_common(struct inode *inode, struct file *file, bool isdir)
                fuse_finish_open(inode, file);
 
        if (lock_inode)
-               mutex_unlock(&inode->i_mutex);
+               inode_unlock(inode);
 
        return err;
 }
@@ -413,9 +413,9 @@ static int fuse_flush(struct file *file, fl_owner_t id)
        if (err)
                return err;
 
-       mutex_lock(&inode->i_mutex);
+       inode_lock(inode);
        fuse_sync_writes(inode);
-       mutex_unlock(&inode->i_mutex);
+       inode_unlock(inode);
 
        req = fuse_get_req_nofail_nopages(fc, file);
        memset(&inarg, 0, sizeof(inarg));
@@ -450,7 +450,7 @@ int fuse_fsync_common(struct file *file, loff_t start, loff_t end,
        if (is_bad_inode(inode))
                return -EIO;
 
-       mutex_lock(&inode->i_mutex);
+       inode_lock(inode);
 
        /*
         * Start writeback against all dirty pages of the inode, then
@@ -486,7 +486,7 @@ int fuse_fsync_common(struct file *file, loff_t start, loff_t end,
                err = 0;
        }
 out:
-       mutex_unlock(&inode->i_mutex);
+       inode_unlock(inode);
        return err;
 }
 
@@ -1160,7 +1160,7 @@ static ssize_t fuse_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
                return generic_file_write_iter(iocb, from);
        }
 
-       mutex_lock(&inode->i_mutex);
+       inode_lock(inode);
 
        /* We can write back this queue in page reclaim */
        current->backing_dev_info = inode_to_bdi(inode);
@@ -1210,7 +1210,7 @@ static ssize_t fuse_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
        }
 out:
        current->backing_dev_info = NULL;
-       mutex_unlock(&inode->i_mutex);
+       inode_unlock(inode);
 
        return written ? written : err;
 }
@@ -1322,10 +1322,10 @@ ssize_t fuse_direct_io(struct fuse_io_priv *io, struct iov_iter *iter,
 
        if (!cuse && fuse_range_is_writeback(inode, idx_from, idx_to)) {
                if (!write)
-                       mutex_lock(&inode->i_mutex);
+                       inode_lock(inode);
                fuse_sync_writes(inode);
                if (!write)
-                       mutex_unlock(&inode->i_mutex);
+                       inode_unlock(inode);
        }
 
        while (count) {
@@ -1413,14 +1413,14 @@ static ssize_t fuse_direct_write_iter(struct kiocb *iocb, struct iov_iter *from)
                return -EIO;
 
        /* Don't allow parallel writes to the same file */
-       mutex_lock(&inode->i_mutex);
+       inode_lock(inode);
        res = generic_write_checks(iocb, from);
        if (res > 0)
                res = fuse_direct_io(&io, from, &iocb->ki_pos, FUSE_DIO_WRITE);
        fuse_invalidate_attr(inode);
        if (res > 0)
                fuse_write_update_size(inode, iocb->ki_pos);
-       mutex_unlock(&inode->i_mutex);
+       inode_unlock(inode);
 
        return res;
 }
@@ -2231,20 +2231,77 @@ static sector_t fuse_bmap(struct address_space *mapping, sector_t block)
        return err ? 0 : outarg.block;
 }
 
+static loff_t fuse_lseek(struct file *file, loff_t offset, int whence)
+{
+       struct inode *inode = file->f_mapping->host;
+       struct fuse_conn *fc = get_fuse_conn(inode);
+       struct fuse_file *ff = file->private_data;
+       FUSE_ARGS(args);
+       struct fuse_lseek_in inarg = {
+               .fh = ff->fh,
+               .offset = offset,
+               .whence = whence
+       };
+       struct fuse_lseek_out outarg;
+       int err;
+
+       if (fc->no_lseek)
+               goto fallback;
+
+       args.in.h.opcode = FUSE_LSEEK;
+       args.in.h.nodeid = ff->nodeid;
+       args.in.numargs = 1;
+       args.in.args[0].size = sizeof(inarg);
+       args.in.args[0].value = &inarg;
+       args.out.numargs = 1;
+       args.out.args[0].size = sizeof(outarg);
+       args.out.args[0].value = &outarg;
+       err = fuse_simple_request(fc, &args);
+       if (err) {
+               if (err == -ENOSYS) {
+                       fc->no_lseek = 1;
+                       goto fallback;
+               }
+               return err;
+       }
+
+       return vfs_setpos(file, outarg.offset, inode->i_sb->s_maxbytes);
+
+fallback:
+       err = fuse_update_attributes(inode, NULL, file, NULL);
+       if (!err)
+               return generic_file_llseek(file, offset, whence);
+       else
+               return err;
+}
+
 static loff_t fuse_file_llseek(struct file *file, loff_t offset, int whence)
 {
        loff_t retval;
        struct inode *inode = file_inode(file);
 
-       /* No i_mutex protection necessary for SEEK_CUR and SEEK_SET */
-       if (whence == SEEK_CUR || whence == SEEK_SET)
-               return generic_file_llseek(file, offset, whence);
-
-       mutex_lock(&inode->i_mutex);
-       retval = fuse_update_attributes(inode, NULL, file, NULL);
-       if (!retval)
+       switch (whence) {
+       case SEEK_SET:
+       case SEEK_CUR:
+                /* No i_mutex protection necessary for SEEK_CUR and SEEK_SET */
                retval = generic_file_llseek(file, offset, whence);
-       mutex_unlock(&inode->i_mutex);
+               break;
+       case SEEK_END:
+               inode_lock(inode);
+               retval = fuse_update_attributes(inode, NULL, file, NULL);
+               if (!retval)
+                       retval = generic_file_llseek(file, offset, whence);
+               inode_unlock(inode);
+               break;
+       case SEEK_HOLE:
+       case SEEK_DATA:
+               inode_lock(inode);
+               retval = fuse_lseek(file, offset, whence);
+               inode_unlock(inode);
+               break;
+       default:
+               retval = -EINVAL;
+       }
 
        return retval;
 }
@@ -2887,7 +2944,7 @@ static long fuse_file_fallocate(struct file *file, int mode, loff_t offset,
                return -EOPNOTSUPP;
 
        if (lock_inode) {
-               mutex_lock(&inode->i_mutex);
+               inode_lock(inode);
                if (mode & FALLOC_FL_PUNCH_HOLE) {
                        loff_t endbyte = offset + length - 1;
                        err = filemap_write_and_wait_range(inode->i_mapping,
@@ -2933,7 +2990,7 @@ out:
                clear_bit(FUSE_I_SIZE_UNSTABLE, &fi->state);
 
        if (lock_inode)
-               mutex_unlock(&inode->i_mutex);
+               inode_unlock(inode);
 
        return err;
 }